CN114014394A - Waste liquid heat pump evaporation system and control method, control equipment and medium thereof - Google Patents
Waste liquid heat pump evaporation system and control method, control equipment and medium thereof Download PDFInfo
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- CN114014394A CN114014394A CN202111306187.4A CN202111306187A CN114014394A CN 114014394 A CN114014394 A CN 114014394A CN 202111306187 A CN202111306187 A CN 202111306187A CN 114014394 A CN114014394 A CN 114014394A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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Abstract
The present disclosure relates to a method for controlling a waste liquid heat pump evaporation system, a control device and a medium. The method comprises the following steps: determining, at the control device, whether the evaporator is in a warm-up state; in response to determining that the evaporator is in a warm-up state, if it is determined that the acquired temperature of the electric heater is lower than a predetermined saturation temperature value, heating the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or causing the vapor pressure within the electric heater to increase so that the vapor pressure is maintained at a predetermined saturation pressure value; in response to determining that the evaporator is in a production operating state and the retrieved pressure of the evaporator is below the predetermined operating pressure value, causing the pressure of the steam for supplemental heating from the heating steam line to be controlled by the compressor outlet pressure. The present disclosure enables quick and smooth adjustment of pressure and temperature within the evaporator, and the manner of adjustment is flexible.
Description
Technical Field
The present disclosure relates generally to heat pump evaporation processing technology, and in particular, to a method for controlling a waste liquid heat pump evaporation system, a control apparatus, and a medium.
Background
Waste liquid heat pump evaporation systems are commonly used to separate hazardous materials from waste liquids. The waste liquid heat pump evaporation system mainly carries out evaporation operation on waste liquid in an evaporator so that the waste liquid is subjected to saturated boiling and is separated into secondary steam and concentrated liquid.
In conventional solutions for controlling waste liquid heat pump evaporation systems, the steam is generally heated by a heater only during the preheating phase, and during the production operation of the evaporator, the steam is no longer heated, but the secondary steam generated by the evaporator is compressed by a compressor, the pressure of the secondary steam is increased to make the saturation temperature of the secondary steam exceed the boiling point of the waste liquid, and then the compressed steam is sent back to the heating chamber of the evaporator as heating steam, so as to control the temperature in the evaporator. However, the control manner in which the secondary vapor generated by the evaporator is compressed by the compressor only to raise its pressure so that its saturation temperature exceeds the boiling point of the waste liquid during the operation of the evaporator is limited in the range in which it can be adjusted, and there is a lack of flexibility, and particularly when the temperature in the evaporator is too low, it is difficult to adjust the pressure and temperature in the evaporator quickly and smoothly to be maintained at desired values.
In summary, the conventional solution for controlling the waste liquid heat pump evaporation system has a limited adjustment range and is not flexible enough, and when the temperature in the evaporator is too low, it is difficult to quickly and smoothly adjust the pressure and temperature in the evaporator to be kept at desired values.
Disclosure of Invention
The present disclosure provides a method for controlling a waste liquid heat pump evaporation system, a control apparatus, and a medium, which can quickly and smoothly adjust the pressure and temperature in an evaporator, and which is flexible in adjustment manner.
According to a first aspect of the present disclosure, a method for controlling a waste liquid heat pump evaporation system is provided. The waste liquid heat pump evaporation system at least comprises a feeding pump, an evaporator, a reboiler, an electric heater, a compressor and control equipment, wherein the waste liquid is sent to the evaporator and the reboiler after passing through the feeding pump, and the compressor is used for compressing secondary steam generated by the evaporator so as to send the compressed steam back to the evaporator. The method for controlling the waste liquid heat pump evaporation system comprises the following steps: determining, at the control device, whether the evaporator is in a warm-up state; in response to determining that the evaporator is in a warm-up state, determining whether the acquired temperature of the electric heater is below a predetermined saturation temperature value; in response to determining that the obtained temperature of the electric heater is lower than a predetermined saturation temperature value, heating the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or causing the vapor pressure within the electric heater to increase so that the vapor pressure is maintained at a predetermined saturation pressure value; in response to determining that the evaporator is in a production operating state and the retrieved pressure of the evaporator is below a predetermined first pressure setpoint, the pressure of the steam for supplemental heating from the heating steam line is controlled by the compressor outlet pressure.
According to a second aspect of the present invention there is also provided a waste liquid heat pump evaporation system, the system comprising: a feed pump for providing the waste liquid to the evaporator and the reboiler; the evaporator is used for carrying out evaporation operation on the waste liquid in the evaporator so as to generate secondary steam and concentrated liquid; the reboiler is used for providing heat for the waste liquid in the evaporator and the reboiler; the compressor is used for compressing the secondary steam generated by the evaporator so as to send the compressed secondary steam back to the evaporator for heating the waste liquid in the evaporator; the electric heater is used for providing a heat source for preheating the waste liquid and supplementing heat for the evaporator, and a heating steam pipeline is arranged between the reboiler and the electric heater and used for providing steam for preheating or supplementing heat from the electric heater to the reboiler; and a control device comprising at least one processing unit and at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, the instructions when executed by the at least one processing unit, cause the control device to perform the method of the first aspect of the disclosure.
According to a third aspect of the present invention, there is also provided a control apparatus. The control device comprises at least one processing unit and at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, which when executed by the at least one processing unit, cause the control device to perform the method of the first aspect of the present disclosure.
According to a fourth aspect of the present disclosure, there is also provided a computer-readable storage medium. The computer readable storage medium has stored thereon machine executable instructions which, when executed, cause a machine to perform the method of the first aspect of the disclosure.
In some embodiments, a heating steam line is configured between the reboiler and the electric heater for providing steam from the electric heater for preheating or for recuperation to the reboiler.
In some embodiments, causing the pressure of the steam for supplemental heating from the heating steam line to be controlled by the compressor outlet pressure comprises: acquiring a pressure detection value of a compressed steam pipeline at the outlet of the compressor; determining whether a pressure detection value of a compressed vapor line at an outlet of the compressor is consistent with a pressure of the vapor for the supplementary heating from the heating vapor line; and adjusting the heating power applied on the heating rod of the electric heater in response to determining that the pressure detection value of the compressed vapor line at the outlet of the compressor does not coincide with the pressure of the vapor for heat supplement from the heating vapor line.
In some embodiments, heating the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or raising the vapor pressure within the electric heater so that the vapor pressure is maintained at the predetermined saturation pressure value comprises: the heating power applied to the heating rod of the electric heater is adjusted via the second controller based on a difference between the temperature of the electric heater and a predetermined saturation temperature value, or based on a difference between the vapor pressure within the electric heater and a predetermined saturation pressure value.
In some embodiments, adjusting, via the second controller, the heating power applied to the heating rod of the electric heater comprises: and adjusting the conduction angles of the three groups of anti-parallel unidirectional silicon controlled rectifiers included by the second control unit based on the difference between the temperature of the electric heater and a preset saturation temperature value or the difference between the steam pressure in the electric heater and a preset saturation pressure value so as to change the current flowing through the heating rod of the electric heater, wherein the three groups of anti-parallel unidirectional silicon controlled rectifiers are electrically connected with the heating rod of the electric heater.
In some embodiments, the method for controlling a waste liquid heat pump evaporation system further comprises: determining whether the pressure in the evaporator is below a predetermined first pressure setpoint; in response to determining that the pressure in the evaporator is below a predetermined first pressure setpoint, adjusting an opening of a heating steam regulating valve to regulate the pressure in the evaporator with steam for supplemental heating from a heating steam line disposed on the heating steam line between the electric heater and the reboiler.
In some embodiments, the method for controlling a waste liquid heat pump evaporation system further comprises: determining whether at least one predetermined pressure condition is satisfied, the predetermined pressure condition comprising at least one of: the detected pressure difference at the inlet and the outlet of the compressor is less than or equal to a preset safety pressure threshold value; the detected compressor outlet pressure exceeds a predetermined range of a second pressure set point; in response to determining that at least one predetermined pressure condition is satisfied, adjusting an opening of a compressor rear end exhaust valve to adjust a compressor outlet pressure via a pressure build-up or an exhaust.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
Fig. 1 shows a schematic diagram of a system for a method of controlling a waste liquid heat pump evaporation system according to an embodiment of the present disclosure.
Fig. 2 shows a flow diagram of a method for controlling a waste liquid heat pump evaporation system according to an embodiment of the present disclosure.
Fig. 3 shows a schematic diagram of a waste liquid heat pump evaporation system according to an embodiment of the present disclosure.
Fig. 4 shows a circuit diagram of a control unit for adjusting the heating power of an electric heater according to an embodiment of the present disclosure.
Fig. 5 shows a circuit diagram of a second control unit for regulating a three-phase load voltage of an electric heater according to an embodiment of the present disclosure.
Fig. 6 shows a flow chart of a method for having the pressure of the steam controlled by the compressor outlet pressure, in accordance with an embodiment of the present disclosure.
FIG. 7 shows a flow chart of a method for regulating compressor outlet pressure according to an embodiment of the present disclosure.
Fig. 8 shows a schematic diagram of a heat pump evaporator for implementing a method of regulating compressor outlet pressure according to an embodiment of the present disclosure.
FIG. 9 schematically illustrates a block diagram of an electronic device suitable for use to implement embodiments of the present disclosure.
Like or corresponding reference characters designate like or corresponding parts throughout the several views.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object.
As described above, in the conventional scheme for controlling the waste liquid heat pump evaporation system, the control manner in which the secondary vapor generated by the evaporator is compressed by the compressor only to raise its pressure so that its saturation temperature exceeds the boiling point of the waste liquid during the operation of the evaporator is limited in the range in which it can be adjusted, and there is a lack of flexibility, particularly when the temperature in the evaporator is too low, it is difficult to adjust the pressure and temperature in the evaporator quickly and smoothly to be maintained at desired values.
To address, at least in part, one or more of the above problems, and other potential problems, an example embodiment of the present disclosure is directed to a method for controlling temperature and pressure within an evaporator of a waste liquid heat pump evaporation system. Heating, by the control device, the demineralized water with the electric heater so that the temperature of the demineralized water maintains a predetermined saturation temperature value, or raising the vapor pressure within the electric heater so that the vapor pressure maintains a predetermined saturation pressure value, when it is determined whether the evaporator is in a warm-up state and the acquired temperature of the electric heater is lower than the predetermined saturation temperature value. The present disclosure can rapidly bring the waste liquid in the evaporator to a predetermined preheat temperature value by raising the vapor pressure in the electric heater and providing it to the reboiler while the evaporator is in a preheat state. In addition, the present disclosure makes the pressure of the steam for heat supplement supplied from the heating steam line to the reboiler controlled by the compressor outlet pressure when it is determined that the evaporator is in a production operation state and the acquired pressure of the evaporator is lower than a predetermined first pressure set value, may ensure that the main steam is the compressed steam and the sub-steam is the steam for heat supplement in the reboiler, and may achieve smooth heat exchange in the reboiler and maintain stable operation of the system by making the qualities of the compressed steam and the steam for heat supplement uniform. Thus, the present disclosure enables quick and smooth adjustment of pressure and temperature within the evaporator, and the manner of adjustment is flexible.
Fig. 1 shows a schematic diagram of a system 100 for a method of controlling a waste liquid heat pump evaporation system according to an embodiment of the present disclosure. As shown in fig. 1, the system 100 includes, for example, a control apparatus 110 and a heat pump evaporator 120. Fig. 1 shows a partial structure of the heat pump evaporation device 120. The heat pump evaporation apparatus 120 further includes an evaporator 130, a feed pump, a waste liquid tank (not shown in fig. 1), a reboiler 150, a compressor 140, an electric heater 160, a signal acquisition unit, and the like. The control device 110 may interact with the data acquisition unit, the heat pump evaporator 120, in a wired or wireless manner.
As for the waste liquid tank, it is used for storing waste liquid. The waste liquid in the waste liquid tank is sent to the evaporator 130 and the reboiler 150 via, for example, a feed pump, a feed regulating valve, not shown in fig. 1.
As to the feed pump, it is used to supply the waste liquid to the evaporator and the reboiler. In some embodiments, the waste liquid in the waste liquid tank is sent to the evaporator 130 and the reboiler 150, for example, via a feed pump, a feed regulating valve, a primary preheater, a condensate cooler (not shown in fig. 1).
As for the evaporator 130, it is used to perform an evaporation operation on the waste liquid in the evaporator 130 so that the waste liquid is boiled in saturation and separated into a secondary vapor (vapor phase) and a concentrated liquid (liquid phase). The top of the evaporator 130 is connected to a top reflux line through which distillate can flow into the evaporator 130. The overhead reflux line is provided with an overhead reflux on-off valve and an overhead reflux regulating valve (collectively referred to as "overhead reflux valve", not shown in fig. 1). The flow of the reflux distillate at the top of the tower can be controlled by adjusting the opening of the reflux valve at the top of the tower. The bottom (lower end) of the evaporator 130 is connected to a bottom reflux line and a concentrated solution discharge line. A tower reflux switch valve and a tower reflux regulating valve (collectively called as a "tower reflux valve", not shown in fig. 1) are arranged on the tower reflux line. The column reflux line is used to reflux at least a portion of the distillate to the evaporator via the column reflux valve. The concentrate discharge line is used to allow at least a portion of the evaporator concentrate to exit the evaporator 130. A concentrate discharge regulating valve (not shown in fig. 1) is provided on the concentrate discharge line.
As for the compressor 140, it is communicated with the top end of the evaporator 130 for compressing the secondary vapor outputted from the evaporator 130 so as to increase the temperature and pressure of the secondary vapor. The compressed vapor is sent to the shell side of reboiler 150 to heat the spent liquor.
With respect to reboiler 150, it is used to provide heat to the waste streams of evaporator 130 and reboiler 150. Reboiler 150 may receive compressed vapor from compressor 140 via compressed vapor line 142; steam for supplemental heating from electric heater 160 may also be received via heating steam line 152.
With respect to the electric heater 160, it is used to provide a heat source for preheating the waste liquid and to supplement heat to the evaporator. For example, the electric heater 160 adjusts the heating power applied on the heating rod of the electric heater based on the control of the computing device 110 to adjust the pressure of the steam within the electric heater. A heating steam line 152 is arranged between the reboiler 150 and the electric heater 160 for providing steam from the electric heater 160 to the reboiler 150 for preheating or recuperation.
Regarding the control device 110, it is used to control the electric heater to heat the demineralized water so that the temperature of the demineralized water is maintained at a predetermined saturation temperature value, or to control the vapor pressure within the electric heater so that the vapor pressure is maintained at a predetermined saturation pressure value, upon determining that the acquired temperature of the electric heater is lower than the predetermined saturation temperature value. The control means 110 is also arranged to control the pressure of the steam supplied from the heating steam line to the reboiler by the compressor outlet pressure, upon determining that the evaporator is in production operation and that the retrieved pressure of the evaporator is below a predetermined first pressure setpoint. The control device 110 is also used to set and output a plurality of set values. For example, a saturation pressure setpoint 166 regarding the vapor pressure within the electric heater, a saturation temperature setpoint 164 regarding the temperature within the electric heater. The control device 110 comprises, for example, at least one processing unit and at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, which when executed by the at least one processing unit, is used to control the heat pump evaporation apparatus 120. The control device 110, which may have one or more processing units, includes special purpose processing units such as GPUs, FPGAs, and ASICs, as well as general purpose processing units such as CPUs. In addition, one or more virtual machines may also be running on each control device 110. In some embodiments, the control device 110 is, for example, a PLC for controlling the heat pump evaporator 120, and can be used in three operation modes, i.e., automatic operation, semi-automatic operation, and manual operation. In some embodiments, the control device further comprises a communication system. The communication system is used for transmitting accumulated flow values and electric energy through a communication protocol. In some embodiments, the control device 110 of the heat pump evaporation apparatus 120 further includes a control unit for adjusting the heating power of the electric heater. For example, a second control unit for regulating the three-phase load voltage of the electric heater.
As for the signal acquisition unit, it includes, for example: a second pressure sensor 144 for detecting a pressure detection value of the compressed vapor line at the outlet of the compressor, a first temperature sensor 162 for detecting a temperature of the electric heater, a first pressure sensor 168 for detecting a vapor pressure in the electric heater, a third pressure sensor (not shown in fig. 1) for detecting a pressure of the secondary vapor in the overhead secondary vapor line, a current detection device 172 for detecting a current flowing through the heating rod of the electric heater, and the like.
A method 200 for controlling a waste liquid heat pump evaporation system according to an embodiment of the present disclosure will be described below in conjunction with fig. 2-5. Fig. 2 shows a flow diagram of a method 200 for controlling a waste liquid heat pump evaporation system according to an embodiment of the present disclosure. Fig. 3 shows a schematic diagram of a waste liquid heat pump evaporation system 300 according to an embodiment of the present disclosure. Fig. 4 shows a circuit diagram of a control unit 400 for adjusting the heating power of an electric heater according to an embodiment of the present disclosure. Fig. 5 shows a circuit diagram of a second control unit for regulating a three-phase load voltage of an electric heater according to an embodiment of the present disclosure. It should be understood that the method 200 may be performed, for example, at the electronic device 900 depicted in fig. 9. May also be implemented at the control device 110 depicted in fig. 1. It should be understood that method 200 may also include additional acts not shown and/or may omit acts shown, as the scope of the disclosure is not limited in this respect.
At step 202, the control device 110 determines whether the evaporator is in a warm-up state. If the control device 110 determines that the evaporator 330 is not in the warm-up state, it jumps to step 208 to determine whether the evaporator is in the production run state.
To facilitate understanding of the method 200 for controlling a waste liquid heat pump evaporation system of the present disclosure, a waste liquid heat pump evaporation system 300 is illustrated below in connection with fig. 3 via a loading, a warm-up start-up (or "warm-up state"), a total reflux process, a production state of distillate and concentrate (or simply "production run state"). More components of the waste liquid heat pump evaporation system 300 are shown in fig. 3 than in fig. 1. The heat pump evaporator 300 includes, for example, a waste liquid tank 302, a feed pump 304, an evaporator 330, a reboiler 342, a compressor 350, an electric heater 360, and the like. It should be understood that the charging, preheating state, and production operation state of the waste liquid heat pump evaporation system 300 are not limited to the following exemplary processes.
For example, if the control device 110 determines that the evaporator 330 is in a warm-up state via feeding from the waste tank 302 to the evaporator 330 such that the liquid level reaches a first predetermined liquid level threshold (e.g., is a predetermined high liquid level set point) or is within an allowable error from the predetermined first liquid level, the control device 110 determines that the evaporator 330 is in a warm-up state. If the control device 110 determines that the evaporator 330 is not in a warm-up state, but in a loading phase, the control device 110 determines that the evaporator 330 is in a warm-up state, via loading of the evaporator 330 from the waste tank 302 to the evaporator 330 such that the liquid level has not reached a first predetermined liquid level threshold (e.g., is a predetermined high liquid level set point).
If the control device 110 determines that the evaporator 330 is not in the warm-up state, it jumps to step 208 to determine whether the evaporator is in the production run state.
At step 204, if the control device 110 determines that the evaporator is in the warm-up state, it is determined whether the acquired temperature of the electric heater is lower than a predetermined saturation temperature value. For example, if the control device 110 acquires the temperature of the electric heater detected via the first temperature sensor 162; and determining whether the acquired temperature of the electric heater is below a predetermined saturation temperature value; if the detected temperature of the electric heater is greater than or equal to the predetermined temperature value, return to value step 202.
At step 206, if the control apparatus 110 determines that the acquired temperature of the electric heater is lower than the predetermined saturation temperature value, the demineralized water is heated using the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or the vapor pressure within the electric heater is increased so that the vapor pressure is maintained at the predetermined saturation pressure value.
It is understood that steam is generated in the heater when the demineralized water is heated, and therefore, there is a correspondence between the saturation temperature of the demineralized water and the saturation pressure of the steam pressure in the heater. Therefore, temperature control of the demineralized water or vapor pressure control within the heater can be achieved such that the temperature of the electric heater is maintained at a predetermined saturation temperature value.
As for the method of maintaining the temperature of the demineralized water at the predetermined saturation temperature value, for example, as shown in fig. 1, the control device 110 determines to apply the calculated heating power to at least one of the three groups of heating rods, based on the temperature of the electric heater detected via the first temperature sensor 162, and on the saturation temperature setpoint 164, which saturation temperature setpoint 164 is set and output, for example, via the control device 110, the applied heating power being calculated based on the difference between the temperature of the electric heater and the setpoint on the saturation temperature.
As for the method of raising the vapor pressure within the electric heater so that the vapor pressure is maintained at the predetermined saturation pressure value, for example, as shown in fig. 1, the control device 110 determines to apply the calculated heating power to at least one of the three groups of heating rods, based on the vapor pressure within the electric heater detected via the first pressure sensor 168, and on the saturation pressure setpoint 166 (which saturation pressure setpoint 166 is set and output via the control device 110, for example), the applied heating power being calculated based on the difference between the vapor pressure within the electric heater and the saturation pressure setpoint.
For example, if the control device 110 determines that the acquired temperature of the electric heater is lower than the predetermined saturation temperature value, the control device 110 generates an output signal for adjusting the heating power of at least one set of heating rods of the electric heater based on the difference between the saturation temperature setpoint and the temperature of the electric heater detected via the first temperature sensor. For example, if the predetermined control device 110 determines that the difference is large, the heating powers calculated based on the differences are simultaneously applied to the three groups of heating rods. If the predetermined control device 110 determines that the difference is small, for example, the calculated heating power based on the difference is applied to a group of heating rods. As shown in fig. 1, three current detection devices 172 respectively detect the currents flowing through the three groups of heating rods. By adopting the means, the method can better control the adjusting speed and the adjusting precision of the temperature of the electric heater.
A circuit diagram of the control unit 400 for adjusting the heating power of the electric heater is explained below with reference to fig. 4. As shown in fig. 4, the three-phase power is connected to the three-phase power input terminals (R terminal, S terminal and T terminal) of a second control unit 460 (for example, but not limited to, a CTM full-isolation three-phase voltage regulating module) via a switch 410 and a fuse 440, and is further connected to the heating rod 450 of the electric heater by the three-phase output terminals (U terminal, V terminal and W terminal) of the second control unit. The three heating rods of the electric heater are connected to each other, for example, in a triangular manner. One phase of the three-phase power is connected to the heat dissipation fan 442 via the switch 412.
The first current detecting means 430, the second current detecting means 432, and the third current detecting means 432 are used to detect currents flowing through the three heating rods of the electric heater, respectively. Detection signals of the first current detection device 430, the second current detection device 432, and the third current detection device 432 are input to the first control unit 420.
The second control unit 510 for adjusting the three-phase load voltage of the electric heater is explained below with reference to fig. 5. As shown in fig. 5, the second control unit 510 is, for example, a CTM full-isolation three-phase voltage regulation module. The second control unit 510 includes, for example, three-phase potential detection, a phase shift circuit, a trigger circuit, and three sets of anti-parallel thyristors. The R end, the S end and the T end are three-phase power supply input ends, and the U end, the V end and the W end are three-phase output ends.
The second control unit 510 is connected with the three groups of heating rods through the three groups of anti-parallel unidirectional silicon controlled rectifiers, stepless regulation of 0-380V voltage is realized by changing the conduction angle of the silicon controlled rectifiers, and then the current flowing through each group of heating rods is regulated, and further the heating output power of the heating rods is controlled, so that the temperature of the heated demineralized water is regulated, the temperature of the demineralized water is kept at a preset saturation temperature value, the steam pressure in the electric heater is regulated, and the steam pressure is kept at a preset saturation pressure value.
By adopting the above means, this disclosure can realize good linear regulation performance and interference killing feature to electric heater's temperature.
At step 208, the control device 110 determines whether the evaporator is in a production operating state and the acquired temperature of the electric heater is below a predetermined saturation temperature value.
At step 210, if the control device 110 determines that the evaporator is in production operation and the retrieved pressure of the evaporator is below a predetermined first pressure setpoint, the pressure of the steam for make-up from the heating steam line is controlled by the compressor outlet pressure.
Taking fig. 3 as an example, in a state where the evaporator 330 is in a production operation state, i.e., a production state of distillate and concentrate, the distillate and the concentrate are continuously discharged for production at the same time, for example. Specifically, the control device 110 starts the feeding pump 304, opens the feeding switch valve 306 and the feeding adjusting valve 308, feeds the distillation column 330, opens the distillate discharging switch valve 314 and the distillate discharging adjusting valve 312, closes the column bottom reflux switch valve 316, and discharges the qualified distillate for production. When the waste liquid in the evaporation tower 330 is evaporated and concentrated to a set concentration or density, the concentrated liquid discharge valve 332 is opened, and the distillate tower bottom reflux switch valve 316 and the distillate tower bottom reflux adjusting valve 318 are opened.
For example, the control device 110 may determine whether the waste liquid heat pump evaporation system is in a production state of distillate and concentrate, i.e., a production operation state, by determining whether the distillate discharge on-off valve 314 and the distillate discharge adjustment valve 312, and the concentrate discharge valve 332 are in an open state. If the control apparatus 110 determines that the distillate drain on/off valve 314 and the distillate drain adjustment valve 312, the concentrate drain valve 332 are in the open state and the temperature of the electric heater is lower than the predetermined saturation temperature value, the pressure of the steam supplied from the heating steam line to the reboiler is controlled by the compressor outlet pressure.
As for the manner in which the pressure of the steam supplied from the heating steam line to the reboiler is controlled by the compressor outlet pressure, it includes, for example: acquiring a pressure detection value of a compressed steam pipeline at the outlet of the compressor; determining whether a pressure detection value of a compressed vapor line at an outlet of the compressor is consistent with a pressure of the vapor for the supplementary heating from the heating vapor line; and adjusting the heating power applied on the heating rod of the electric heater if it is determined that the pressure detection value of the compressed vapor line at the outlet of the compressor is not in conformity with the pressure of the vapor for heat supplement from the heating vapor line. A method for causing the pressure of the steam to be controlled by the compressor outlet pressure will be described below with reference to fig. 6, and will not be described herein again.
In the above-described aspect, when it is determined whether the evaporator is in the warm-up state and the acquired temperature of the electric heater is lower than the predetermined saturation temperature value, the control device heats the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or raises the vapor pressure within the electric heater so that the vapor pressure is maintained at the predetermined saturation pressure value. The present disclosure can rapidly bring the waste liquid in the evaporator to a predetermined preheat temperature value by raising the vapor pressure in the electric heater and providing it to the reboiler while the evaporator is in a preheat state. In addition, the present disclosure can ensure that the main steam in the reboiler is the compressed steam and the sub-steam is the steam for heat supplement by making the quality of the compressed steam and the quality of the steam for heat supplement be consistent when determining that the evaporator is in the production operation state and the obtained pressure of the evaporator is lower than the predetermined first pressure given value, so that the pressure of the steam for heat supplement provided from the heating steam line to the reboiler is controlled by the outlet pressure of the compressor. Thus, the pressure and temperature in the evaporator can be controlled quickly and stably. In addition, under the different states of the evaporator, the control is carried out by different logics, so the control of the present disclosure is more flexible.
Fig. 6 shows a flow diagram of a method 600 for causing the pressure of steam to be controlled by the compressor outlet pressure, in accordance with an embodiment of the present disclosure. It should be understood that method 600 may be performed, for example, at electronic device 900 depicted in fig. 9. May also be implemented at the control device 110 depicted in fig. 1. It should be understood that method 600 may also include additional acts not shown and/or may omit acts shown, as the scope of the disclosure is not limited in this respect.
At step 602, the control device 110 obtains a pressure detection value of the compressed vapor line at the compressor outlet. For example, the control device 110 acquires a pressure detection value of the compressed vapor line at the compressor outlet detected via the third pressure sensor 144 at the compressor outlet.
At step 604, the control device 110 determines whether the pressure detection value of the compressed vapor line at the compressor outlet is consistent with the pressure of the vapor from the heating vapor line for supplemental heating. If the control device 110 determines that the pressure detection value of the compressed vapor line at the outlet of the compressor is in agreement with the pressure of the vapor for heat supplement from the heating vapor line, it jumps to step 602.
At step 606, if the control device 110 determines that the pressure detection value of the compressed vapor line at the compressor outlet does not coincide with the pressure of the vapor for heat replenishment from the heating vapor line, the heating power applied on the heating rod of the electric heater is adjusted. For example, the control device 110 adjusts the heating power applied to the heating rod of the electric heater via the second controller based on the difference between the pressure of the steam for heat supplement from the heating steam line and the pressure detection value of the compression steam line at the outlet of the compressor. For example, based on a difference between the pressure of the steam for heat supplement from the heating steam line and the pressure detection value of the compression steam line at the outlet of the compressor, the conduction angles of the three sets of anti-parallel unidirectional silicon controlled rectifiers included in the second control unit are adjusted so as to change the current flowing through the heating rod of the electric heater, and the three sets of anti-parallel unidirectional silicon controlled rectifiers are electrically connected with the heating rod of the electric heater.
By adopting the above means, the steam pressure for heat supplement provided to the reboiler from the heating steam pipeline is kept consistent with the outlet pressure of the compressor, so that the stable heat exchange in the reboiler can be ensured, and the stable operation of the system can be maintained.
It should be understood that there is thermal coupling within the heat pump evaporator, for example, the evaporator pressure and the compressor outlet pressure can affect each other, and conventional methods for controlling the waste liquid heat pump evaporation system typically control one of the evaporator pressure and the compressor outlet pressure separately, which results in undesirable control effects due to the thermal coupling within the heat pump evaporator. For example, the pressure at the outlet and inlet of the compressor is controlled by the frequency conversion and bypass flow regulation of the compressor, which has certain disadvantages, especially for roots type displacement compressors, the frequency conversion regulation can only change the air extraction amount, and the regulation effect on the outlet pressure of the compressor is very weak. For another example, if the gas at the outlet of the compressor is returned to the inlet by using the bypass regulation, and the pressures at the outlet and the inlet of the compressor are controlled by the communication of the inlet and outlet pipelines, such regulation would affect the inlet and outlet pressures of the compressor at the same time, which is not favorable for the stable operation of the system. To overcome the above-described deficiencies, in some embodiments, method 200 further includes an improved method 700 for controlling the pressure at the inlet and outlet of the compressor.
A method 700 for controlling the pressure at the inlet and outlet of the compressor is described below in connection with fig. 7 and 8. FIG. 7 shows a flow chart of a method 700 for regulating compressor outlet pressure according to an embodiment of the present disclosure. Fig. 8 illustrates a schematic diagram of a heat pump evaporator apparatus 800 for implementing a method of regulating compressor outlet pressure according to some embodiments of the present disclosure. It should be understood that method 700 may be performed, for example, at electronic device 900 depicted in fig. 9. May also be implemented at the control device 110 depicted in fig. 1. It should be understood that method 700 may also include additional acts not shown and/or may omit acts shown, as the scope of the present disclosure is not limited in this respect.
Fig. 8 illustrates some of the components of the heat pump evaporator 800, particularly those associated with the method 700. The heat pump evaporator 800 includes, for example, an evaporator 830, a reboiler 850, a compressor 840, an electric heater 860, a second pressure sensor 868, a fourth pressure sensor 842, and a third pressure sensor 846. The fourth pressure sensor 842 is used to detect the pressure of the secondary steam within the overhead secondary steam line (i.e., the pressure value at the inlet of the compressor 840). A third pressure sensor 846 is used to detect the pressure of the compressed vapor within the compressed vapor line 844 at the compressor outlet (i.e., the pressure value at the outlet of the compressor 840). The second pressure sensor 868 detects the pressure of the steam for supplemental heating within the heating steam line 862.
At step 702, the control device 110 determines whether the pressure in the evaporator is below a predetermined first pressure setpoint. The first pressure setpoint 848 is, for example, the operating pressure setpoint at which saturated boiling of the waste liquid in the evaporator occurs. The first pressure set value is set and output by the control device 110, for example.
At step 704, if the control apparatus 110 determines that the pressure in the evaporator is below the predetermined first pressure setpoint, the opening of the heating steam regulating valve is adjusted to regulate the pressure in the evaporator by the steam for make-up from the heating steam line disposed on the heating steam line between the electric heater and the reboiler.
For example, if the control device 110 determines that the pressure in the evaporator is below a predetermined first pressure setpoint, the opening of the heating steam regulating valve 864 arranged on the heating steam line 862 is adjusted via the first valve positioner 866, so that the pressure in the evaporator 830 is regulated by the steam for heat replenishment of the heating steam line 862. In some embodiments, the opening adjustment amount of the heating vapor regulating valve 864 is fed back to the pressure control unit to participate in the outlet pressure and inlet pressure control of the compressor together with the first pressure set point 848.
At step 706, the control device 110 determines whether at least one predetermined pressure condition is met, the predetermined pressure condition including at least one of: the detected pressure difference at the inlet and the outlet of the compressor is less than or equal to a preset safety pressure threshold value; the sensed compressor outlet pressure exceeds a predetermined range of a second pressure set point.
At step 708, if the control apparatus 110 determines that at least one predetermined pressure condition is satisfied, the opening of the compressor back-end discharge valve is adjusted to adjust the compressor outlet pressure via a pressure hold-off or a discharge.
For example, if the control apparatus 110 determines that the difference between the pressure of the secondary steam in the overhead secondary steam line detected by the fourth pressure sensor 842 and the pressure of the compressed steam in the compressed steam line 844 at the compressor outlet detected by the third pressure sensor 846 is less than or equal to a predetermined safety pressure threshold, or the control apparatus 110 determines that the pressure of the compressed steam in the compressed steam line 844 at the compressor outlet detected by the third pressure sensor 846 is outside a predetermined range of the second pressure setpoint 852, the opening of the non-condensable gas discharge regulating valve 856 disposed on the non-condensable gas discharge line 858 is adjusted via the second valve positioner 854 to regulate the compressor outlet pressure via a suppressed pressure or a vent.
In the above scheme, through the pressure of simultaneous control evaporimeter and compressor exit pressure to adjust and control the pressure of evaporimeter through the concurrent control steam, adjust compressor exit pressure with suppressing pressure or exhaust through the aperture of the discharge valve of adjusting the rear end, this disclosure can realize that single parameter is stable to be adjusted and quick response, and the regulating effect is obvious.
FIG. 9 schematically illustrates a block diagram of an electronic device (or computing device) 900 suitable for use to implement embodiments of the present disclosure. The device 900 may be a device for implementing the methods 200, 600, 700 shown in fig. 2, 6, 7. As shown in fig. 9, device 900 includes a Central Processing Unit (CPU)901 that can perform various appropriate actions and processes in accordance with computer program instructions stored in a Read Only Memory (ROM)902 or loaded from a storage unit 908 into a Random Access Memory (RAM) 903. In the RAM903, various programs and data required for the operation of the device 900 can also be stored. The CPU901, ROM902, and RAM903 are connected to each other via a bus 904. An input/output (I/O) interface 905 is also connected to bus 904.
A number of components in the device 900 are connected to the I/O interface 905, including: an input unit 906, an output unit 907, a storage unit 908, a processing unit 901 performs the respective methods and processes described above, e.g. performing the methods 200, 600, 700. For example, in some embodiments, the methods 200, 600, 700 may be implemented as a computer software program stored on a machine-readable medium, such as the storage unit 908. In some embodiments, part or all of the computer program may be loaded and/or installed onto device 900 via ROM902 and/or communications unit 909. When loaded into RAM903 and executed by CPU901, may perform one or more of the operations of methods 200, 600, 700 described above. Alternatively, in other embodiments, the CPU901 may be configured in any other suitable manner (e.g., by way of firmware) to perform one or more of the acts of the methods 200, 400.
It should be further appreciated that the present disclosure may be embodied as methods, apparatus, systems, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for carrying out various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor in a voice interaction device, a processing unit of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
The above are merely alternative embodiments of the present disclosure and are not intended to limit the present disclosure, which may be modified and varied by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A method for controlling a waste liquid heat pump evaporation system, the waste liquid heat pump evaporation system comprising at least a feed pump, an evaporator, a reboiler, an electric heater, a compressor and a control device, the waste liquid being fed via the feed pump to the evaporator and the reboiler, the compressor being adapted to compress a secondary vapor generated by the evaporator so as to feed the compressed vapor back to the evaporator, the method comprising:
determining, at the control device, whether the evaporator is in a warm-up state;
in response to determining that the evaporator is in a warm-up state, determining whether the acquired temperature of the electric heater is below a predetermined saturation temperature value;
in response to determining that the obtained temperature of the electric heater is lower than a predetermined saturation temperature value, heating the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at the predetermined saturation temperature value, or causing the vapor pressure within the electric heater to increase so that the vapor pressure is maintained at a predetermined saturation pressure value;
in response to determining that the evaporator is in a production operating state and the retrieved pressure of the evaporator is below a predetermined first pressure setpoint, causing the pressure of the steam for supplemental heating from the heating steam line to be controlled by the compressor outlet pressure.
2. The process of claim 1, wherein a heating steam line is disposed between the reboiler and the electric heater for providing steam from the electric heater for preheating and for supplemental heating to the reboiler.
3. The method of claim 1, wherein causing the pressure of the steam for the supplemental heating from the heating steam line to be controlled by the compressor outlet pressure comprises:
acquiring a pressure detection value of a compressed steam pipeline at the outlet of the compressor;
determining whether a pressure detection value of a compressed vapor line at an outlet of the compressor is consistent with a pressure of the vapor for the supplementary heating from the heating vapor line; and
in response to determining that the pressure detection value of the compressed vapor line at the outlet of the compressor does not coincide with the pressure of the vapor for heat replenishment from the heating vapor line, adjusting the heating power applied on the heating rod of the electric heater.
4. The method of claim 1, wherein heating the demineralized water with the electric heater so that the temperature of the demineralized water is maintained at a predetermined saturation temperature value, or raising the vapor pressure within the electric heater so that the vapor pressure is maintained at a predetermined saturation pressure value comprises:
the heating power applied to the heating rod of the electric heater is adjusted via the second controller based on a difference between the temperature of the electric heater and a predetermined saturation temperature value, or based on a difference between the vapor pressure within the electric heater and a predetermined saturation pressure value.
5. The method of claim 1, wherein adjusting, via the second controller, heating power applied to a heater rod of the electric heater comprises:
and adjusting the conduction angles of three groups of anti-parallel unidirectional silicon controlled rectifiers included in the second control unit based on the difference between the temperature of the electric heater and a preset saturation temperature value or the difference between the steam pressure in the electric heater and a preset saturation pressure value so as to change the current flowing through the heating rod of the electric heater, wherein the three groups of anti-parallel unidirectional silicon controlled rectifiers are electrically connected with the heating rod of the electric heater.
6. The method of claim 1, further comprising:
determining whether the pressure in the evaporator is below a predetermined first pressure setpoint;
in response to determining that the pressure in the evaporator is below a predetermined first pressure setpoint, adjusting an opening of a heating steam regulating valve disposed on a heating steam line between the electric heater and the reboiler to regulate the pressure in the evaporator with steam for supplemental heating from the heating steam line.
7. The method of claim 6, further comprising:
determining whether at least one predetermined pressure condition is satisfied, the predetermined pressure condition comprising at least one of:
the detected pressure difference at the inlet and the outlet of the compressor is less than or equal to a preset safety pressure threshold value;
the detected compressor outlet pressure exceeds a predetermined range of a second pressure set point;
in response to determining that at least one predetermined pressure condition is satisfied, adjusting an opening of a compressor rear end exhaust valve to adjust a compressor outlet pressure via a pressure build-up or an exhaust.
8. A waste liquid heat pump evaporation system, comprising:
a feed pump for providing the waste liquid to the evaporator and the reboiler;
the evaporator is used for carrying out evaporation operation on the waste liquid in the evaporator so as to generate secondary steam and concentrated liquid;
the reboiler is used for providing heat for the waste liquid in the evaporator and the reboiler;
the compressor is used for compressing the secondary steam generated by the evaporator so as to send the compressed secondary steam back to the evaporator for heating the waste liquid in the evaporator;
the electric heater is used for providing a heat source for preheating the waste liquid and supplementing heat for the evaporator, and a heating steam pipeline is arranged between the reboiler and the electric heater and used for providing steam for preheating or supplementing heat from the electric heater to the reboiler; and
a control device comprising at least one processing unit and at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, which when executed by the at least one processing unit, cause the computing device to perform the method of any of claims 1 to 7.
9. A control device, comprising:
at least one processing unit;
at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, the instructions when executed by the at least one processing unit, cause the control device to perform the method of any of claims 1-7.
10. A computer readable storage medium having stored thereon machine executable instructions which, when executed, cause a machine to perform the method of any one of claims 1 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115643736A (en) * | 2022-12-26 | 2023-01-24 | 湖南大学 | Immersion type cooling device and control method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000282272A (en) * | 1999-03-30 | 2000-10-10 | Osaka Gas Co Ltd | Treatment of waste hydrochloric acid |
| CN104713345A (en) * | 2015-03-31 | 2015-06-17 | 云南师范大学 | Energy-storage solar heat pump drying equipment with double heat sources for heat supply |
| JP2015205240A (en) * | 2014-04-18 | 2015-11-19 | 株式会社ササクラ | Evaporative concentration device and evaporative concentration method |
| CN107062677A (en) * | 2017-03-23 | 2017-08-18 | 李章� | A kind of auxiliary enthalpy increasing heat pump device of low temperature electric |
| CN207899001U (en) * | 2017-10-30 | 2018-09-25 | 吉安市御美丽健康产业股份有限公司 | The film condensing device of calm and peaceful Gallus domesticlus brisson Gly-His-Lys |
| CN207970468U (en) * | 2018-02-11 | 2018-10-16 | 哈尔滨理工大学 | A kind of MVR evaporation concentration systems |
| CN112881594A (en) * | 2020-11-17 | 2021-06-01 | 中国核电工程有限公司 | Performance verification method of nuclear power plant waste liquid treatment device |
-
2021
- 2021-11-05 CN CN202111306187.4A patent/CN114014394A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000282272A (en) * | 1999-03-30 | 2000-10-10 | Osaka Gas Co Ltd | Treatment of waste hydrochloric acid |
| JP2015205240A (en) * | 2014-04-18 | 2015-11-19 | 株式会社ササクラ | Evaporative concentration device and evaporative concentration method |
| CN104713345A (en) * | 2015-03-31 | 2015-06-17 | 云南师范大学 | Energy-storage solar heat pump drying equipment with double heat sources for heat supply |
| CN107062677A (en) * | 2017-03-23 | 2017-08-18 | 李章� | A kind of auxiliary enthalpy increasing heat pump device of low temperature electric |
| CN207899001U (en) * | 2017-10-30 | 2018-09-25 | 吉安市御美丽健康产业股份有限公司 | The film condensing device of calm and peaceful Gallus domesticlus brisson Gly-His-Lys |
| CN207970468U (en) * | 2018-02-11 | 2018-10-16 | 哈尔滨理工大学 | A kind of MVR evaporation concentration systems |
| CN112881594A (en) * | 2020-11-17 | 2021-06-01 | 中国核电工程有限公司 | Performance verification method of nuclear power plant waste liquid treatment device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115643736A (en) * | 2022-12-26 | 2023-01-24 | 湖南大学 | Immersion type cooling device and control method thereof |
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