CN213421061U - Dry quenching boiler equipment and sewage discharge system thereof - Google Patents

Abstract

The application provides a dry quenching boiler device and a blowdown system thereof, the blowdown system comprises a first blowdown pipeline, a second blowdown pipeline and a control unit, wherein the first blowdown pipeline is respectively connected with a steam drum and a first blowdown processing device, and the first blowdown pipeline is provided with a first valve for connecting or disconnecting the first blowdown pipeline and a second valve for adjusting the flow of fluid; the second sewage discharge pipeline is respectively connected with the process pipeline and the second sewage discharge treatment device, and a third valve for switching on or switching off the second sewage discharge pipeline is arranged on the second sewage discharge pipeline; the control unit is used for keeping the first valve in a continuous opening state and controlling the second valve to adjust the flow of the fluid in the first sewage pipeline according to the quality parameter of the fluid in the steam drum; and controlling the opening of the third valve every a first preset time interval, and controlling the closing of the third valve after a second preset time interval. By applying the method and the device, the automatic pollution discharge level of the coke dry quenching boiler can be improved, and the labor intensity of workers is reduced.

Description

Dry quenching boiler equipment and sewage discharge system thereof

Technical Field

The application relates to the technical field of coke quenching, in particular to dry quenching boiler equipment and a sewage discharge system thereof.

Background

At present, for the existing domestic dry quenching boiler equipment, when a blowdown system of the existing dry quenching boiler equipment is adopted to blowdown a boiler, an operator usually starts the blowdown system manually and opens a blowdown valve to blowdown. Therefore, the workload of operators is increased, the production cost is increased, and the requirements of people on automatic and intelligent manufacturing cannot be met.

Disclosure of Invention

The application aims at solving at least one of the technical problems in the prior art, provides the dry quenching boiler equipment and the sewage system thereof, can improve the automatic sewage level of the dry quenching boiler, and reduces the labor intensity of workers.

To achieve the object of the present application, a first aspect provides a blowdown system for a dry quenching boiler apparatus, including a first blowdown line, a second blowdown line, and a control unit, wherein,

the first sewage discharge pipeline is respectively connected with a steam drum of the dry quenching boiler equipment and a first sewage discharge treatment device, and a first valve and a second valve are arranged on the first sewage discharge pipeline, wherein the first valve is used for connecting or disconnecting the first sewage discharge pipeline; the second valve is used for regulating the flow of the fluid in the first sewage pipeline;

the second sewage discharge pipeline is respectively connected with at least one process pipeline of the dry quenching boiler equipment, which is connected with the steam drum, and a second sewage discharge treatment device, and a third valve is arranged on the second sewage discharge pipeline and used for switching on or switching off the second sewage discharge pipeline;

the control unit is used for keeping the first valve in a continuous opening state and controlling the second valve to adjust the flow of the fluid in the first sewage pipeline according to the quality parameter of the fluid in the steam drum; and controlling the third valve to be opened every a first preset time interval, and controlling the third valve to be closed after a second preset time interval.

Optionally, the steam generator further comprises a fluid quality monitoring device, wherein the fluid quality monitoring device is used for detecting the quality parameter of the fluid in the steam drum in real time and sending the detected quality parameter of the fluid to the control unit;

the control unit is used for comparing the detected quality parameter of the fluid with a set value of the quality parameter, and controlling the second valve to adjust the flow of the fluid in the first sewage pipeline according to the comparison result.

Optionally, the quality parameter of the fluid comprises the salinity of the water; the fluid quality monitoring device comprises a water quality monitoring device, and the water quality monitoring device is used for obtaining the salt content of water by monitoring the conductivity of the water in the steam drum.

Optionally, the first valve and the third valve each comprise an electrically operated shut-off valve.

Optionally, the second valve comprises a flow regulating valve.

Optionally, the number of the process pipelines is multiple, the number of the second sewage pipes is the same as that of the process pipelines, the second sewage pipes are connected in a one-to-one correspondence manner, and each second sewage pipe is provided with the third valve.

Optionally, the control unit controls the third valve on each second sewage draining pipeline to gradually open from a closed state to a fully opened state and then gradually close to the closed state at intervals of the first preset time, and the third valve on the previous second sewage draining pipeline is in the closed state and opens the third valve on the next second sewage draining pipeline at intervals of a third preset time.

Optionally, the first sewage disposal device comprises a continuous sewage expander, the second sewage disposal device comprises a periodic sewage expander, and a plurality of the second sewage pipes are connected with the periodic sewage expander through a main pipe.

Optionally, a fourth valve is further disposed on the first sewage discharge pipe, and the fourth valve is disposed on the first sewage discharge pipe, is in a normally open state, and can be manually closed to disconnect the first sewage discharge pipe from the first sewage discharge treatment device;

and a fifth valve is also arranged on the second sewage draining pipeline, is in a normally open state and can be manually closed to disconnect the second sewage draining pipeline from the second sewage draining treatment device.

For the purpose of this application, a second aspect is a dry quenching boiler plant comprising a boiler and a blowdown system as described in the first aspect.

The application has the following beneficial effects:

according to the blowdown system provided by the application, the first valve can be kept in a continuous opening state through the control unit, and the second valve is controlled to adjust the flow of the fluid in the first blowdown pipeline according to the quality parameters of the fluid in the steam drum, so that sewage which does not meet the water quality standard in the steam drum is continuously discharged into the blowdown treatment device, and the quality of water in the steam drum is guaranteed; the control unit can also control the opening of the third valve at intervals of a first preset time, and control the closing of the third valve after the second preset time, so as to periodically discharge impurities, water slag and the like in the boiler, avoid scaling or blockage of a pipeline and avoid the phenomenon of water quality deterioration of the boiler caused by forgetting to discharge sewage by field operators; and the workload of field operators and central control personnel is integrally reduced, the labor intensity is reduced, and the labor cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of an exhaust system according to an embodiment of the present disclosure;

fig. 2 is another structural diagram of a sewage system according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The following describes the technical solutions of the present application and how to solve the above technical problems in specific embodiments with reference to the accompanying drawings.

The embodiment provides a blowdown system, which is applied to a dry quenching boiler device, wherein the dry quenching boiler device can comprise a control system, a boiler system, a blowdown system and the like, and the boiler system can comprise a steam drum 101 and various process pipelines connected with the steam drum 101. The steam drum 101 may also be called a drum or a boiler, and is configured to collect a steam-water mixture, separate the steam from the steam, receive steam generated by an evaporator, a water wall 102, and the like, and deliver saturated steam to a superheater after separation. The evaporator and the water wall 102 can be formed by the above-mentioned various process pipelines, the evaporator is mainly used for generating steam, and can include a light tube evaporator 104 and a finned tube evaporator 105; the water wall 102 is laid on the surface of a furnace wall (an insulation shell of the boiler equipment, which plays the role of heat insulation and sealing) and is mainly used for absorbing heat and reducing the surface temperature of the furnace wall; the superheater mainly heats and dries saturated steam or superheated steam at a certain temperature led out from the steam drum 101 to reach a certain superheated temperature, so that the degree of superheat of the steam is improved, and the enthalpy of the steam is increased. And the steam drum 101 can be connected with the evaporator and the water wall 102 through an ascending pipe and a descending pipe 106 and is connected with the superheater through a hanging pipe 103.

Referring to fig. 1 and 2, the blowdown system of the present embodiment may include a first blowdown line 10, a second blowdown line 20, and a control unit 30, and the first blowdown line 10 and the second blowdown line 20 are controlled by the control unit 30 to implement automatic blowdown of the dry quenching boiler apparatus. Wherein, the first sewage draining pipeline 10 and the control unit 30 (and other devices arranged on the first sewage draining pipeline 10) can be regarded as a continuous sewage draining system to realize automatic continuous sewage draining; the second sewerage pipeline 20 and the control unit 30 (and other devices provided on the second sewerage pipeline 20) are regarded as a periodic sewerage system to achieve automatic periodic sewerage.

As shown in fig. 1, the first blowdown line 10 is connected to a drum 101 and a first blowdown treatment device 61 of the dry quenching boiler apparatus, respectively, and a first valve 51 and a second valve 52 may be provided on the first blowdown line 10, wherein the first valve 51 is used to connect or disconnect the first blowdown line 10; the second valve 52 is used to regulate the flow rate of the fluid in the first drain line 10. The control unit 30, which may be part of the control system, may be configured to maintain the first valve 51 in a continuously open state, and control the second valve 52 to adjust the flow rate of the fluid in the first sewage pipeline 10 according to the quality parameter of the fluid in the steam drum 101, so as to continuously discharge the sewage in the steam drum 101, which does not meet the water quality standard, into the sewage treatment apparatus, thereby ensuring the quality of the water in the steam drum 101; and the workload of central control personnel is reduced, the labor intensity is reduced, and the labor cost is reduced.

Wherein, first blowdown processing apparatus 61 can be but not limited to including continuous blowdown expander for the continuous blowdown decompression dilatation of boiler, sewage is adiabatic expansion separation for steam and waste hot water in continuous blowdown expander, and through dilatation, step-down, heat exchange in continuous blowdown expander, then discharge, steam can be drawn forth by special pipeline, waste hot water can be discharged away through floater liquid level valve or overflow regulating valve is automatic, heat energy can be retrieved and recycled, continuous blowdown volume can be along with boiler feedwater load change automatically regulated, keep relatively stable blowdown rate.

As shown in fig. 1, the drainage system may further include a fluid quality monitoring device 40, and the fluid quality monitoring device 40 may be configured to detect a quality parameter of the fluid in the steam drum 101 in real time and send the detected quality parameter of the fluid to the control unit 30; then the control unit 30 can compare the detected quality parameter of the fluid with the set value of the quality parameter, and control the second valve 52 to adjust the flow rate of the fluid in the first sewage pipeline 10 according to the comparison result, so as to realize the real-time detection of the fluid (such as water) in the steam pocket 101 by the continuous sewage system, and timely adjust the flow rate of the fluid in the first sewage pipeline 10 according to the detected quality parameter and the set value preset in the control unit 30, that is, the sewage discharge amount can be automatically adjusted according to the online monitoring result of the water in the steam pocket 101, thereby not only ensuring the water quality of the water in the steam pocket 101 to reach the standard, but also preventing the waste of heat energy and water resource caused by excessive sewage discharge.

Further, if the salt content of the water in the steam drum 101 is too high, a large influence may be caused on the steam drum 101 and other devices of the boiler equipment (scale may be generated on the heated surface of the boiler, and due to poor heat conduction performance of the scale, the thermal resistance of the heated surface of the boiler may be increased, so that the heated surface may be heated unevenly or locally overheated, or even explode, as the salt content of the boiler water increases, the water carrying amount of the steam may be significantly increased, the salt content in the steam may also be significantly increased, and the quality of the steam may be deteriorated; fluid quality monitoring device 40 may include water quality monitoring device, and water quality monitoring device can carry out real-time supervision to the salinity of steam pocket 101 normal water, avoids the salinity to increase and causes the harm to boiler equipment. Since the conductivity of the water has a linear relationship with the salinity, and is more convenient to detect, the water quality monitoring device can obtain the salinity of the water by monitoring the conductivity of the water in the steam drum 101.

In a specific embodiment of this embodiment, first valve 51 can include electric stop valve or pneumatic stop valve, also can be the flowmeter, both can be through setting for the biggest discharge capacity of the whole adjustment of the normally open volume of electric stop valve, can be when second valve 52 became invalid again, and the first discharge pipe way 10 of long-range disconnection avoids causing excessive blowdown, causes water waste etc.. The second valve 52 may include a flow regulating valve, a flow meter, etc. to achieve timely regulation of the amount of waste.

As shown in fig. 2, the second sewage draining line 20 is connected to at least one process line of the dry quenching boiler plant connected to the drum 101 and the second sewage treatment device 62, respectively, and a third valve 53 is provided on the second sewage draining line 20 for switching on or off the second sewage draining line 20. The control unit 30 may control the opening of the third valve 53 every interval for a first preset time period, and control the closing of the third valve 53 after the second preset time period, so as to periodically discharge impurities and water slag inside the boiler into the periodic blowdown expander, so as to avoid scaling or clogging of the pipeline; and the automatic operation of the periodic blowdown system is realized, the phenomenon that the water quality of the boiler is deteriorated due to forgetting to blowdown by field operators is avoided, the workload of the field operators is reduced, the labor intensity is reduced, and the labor cost is reduced.

The process line may be a pipeline constituting the evaporator, the water wall 102, and the suspension pipe 103, or a downcomer 106 connected to the steam drum 101, such as the evaporator, the water wall 102, and the suspension pipe 103. Specifically, as shown in fig. 2, because the area of the water-cooled wall 102 is large, a plurality of (e.g., four) sewage outlets may be arranged on the water-cooled wall 102 to timely discharge sewage from the water-cooled wall 102, so as to prevent a certain part from being blocked; other downcomers 106 connected with the steam drum 101, such as the light pipe evaporator 104, the finned pipe evaporator 105 and the hanging pipe 103, can be respectively provided with one sewage outlet (namely the downcomers 106 can be provided with three sewage outlets in total). Each pipeline provided with the sewage discharge port can be regarded as one process pipeline, the number of the process pipelines can be multiple, the number of the second sewage discharge pipelines 20 can be the same as that of the process pipelines and can be connected in a one-to-one correspondence manner, and each second sewage discharge pipeline 20 is provided with a third valve 53, so that the sewage can be effectively discharged from different positions of the boiler equipment in time.

Further, the third valve 53 may include an electric or pneumatic shut-off valve to enable remote opening and closing, and thus, automation of the periodic blowdown system.

The second pollution discharging processing device 62 may include, but is not limited to, a periodic pollution discharging expander, and a plurality of second pollution discharging pipelines 20 may be connected to the periodic pollution discharging expander through a main pipeline, so as to separate secondary steam and waste hot water from waste hot water containing impurities and water residue discharged periodically by the boiler through pressure reduction and expansion. The secondary steam is discharged into the atmosphere or used as a heat source, and the waste hot water can be discharged into a drainage system through a sewage discharging and cooling pond.

In another embodiment of this embodiment, the control unit 30 can control the third valve 53 on each second sewage pipeline 20 to gradually open from the closed state to the fully opened state and then gradually close to the closed state every a first preset time interval, and the third valve 53 on the previous second sewage pipeline 20 is in the closed state and the third valve 53 on the next second sewage pipeline 20 is opened every a third preset time interval, so as to prevent the third valve 53 from being in the fully opened state for a long time to cause excessive discharge, even discharge greater than water supply, and discharge water near the sewage outlet in a short time.

In another specific embodiment of this embodiment, a fourth valve 54 may be further disposed on the first sewage conduit 10, and the fourth valve 54 is disposed on the first sewage conduit 10, and is in a normally open state, and can be manually closed to disconnect the first sewage conduit 10 from the first sewage treatment device 61; a fifth valve 55 may also be provided on the second trapway 20, and the fifth valve 55 is provided on the second trapway 20 and is normally open and can be manually closed to disconnect the second trapway 20 from the second device 62. Thus, by additionally arranging the fourth valve 54 on the first sewage pipeline 10, and additionally arranging the fifth valve 55 on the second sewage pipeline 20, the fourth valve 54 and the fifth valve 55 can be manual valves, so that when the power system fails, the first sewage pipeline 10 and the second sewage pipeline 20 can be manually disconnected, and excessive discharge caused by the power system failure is prevented.

Based on the same concept of the above-mentioned blowdown system, the embodiment further provides dry quenching boiler equipment, which comprises a boiler and a blowdown system, wherein the blowdown system is the blowdown system of any one of the above-mentioned embodiments.

The dry quenching boiler equipment provided by the embodiment comprises the blowdown system of any one of the above embodiments, and at least the beneficial effects of the blowdown system can be realized, namely, the first valve 51 can be kept in a continuous opening state through the control unit 30, and the second valve 52 is controlled to adjust the flow rate of the fluid in the first blowdown pipeline 10 according to the quality parameter of the fluid in the steam drum 101, so that the sewage which does not meet the water quality standard in the steam drum 101 can be continuously discharged into the blowdown treatment device, and the quality of the water in the steam drum 101 can be guaranteed; the control unit 30 can also control the opening of the third valve 53 at intervals of a first preset time, and control the closing of the third valve 53 after the second preset time, so as to realize the periodic discharge of impurities, water slag and the like in the boiler, avoid the scaling or blockage of the pipeline and avoid the phenomenon of water quality deterioration of the boiler caused by forgetting to discharge sewage by field operators; and the workload of field operators and central control personnel is integrally reduced, the labor intensity is reduced, and the labor cost is reduced.

It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present application, and that the present application is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the application, and these changes and modifications are to be considered as the scope of the application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (10)

1. A blow-down system applied to dry quenching boiler equipment is characterized by comprising a first blow-down pipeline, a second blow-down pipeline and a control unit, wherein,

the first sewage discharge pipeline is respectively connected with a steam drum of the dry quenching boiler equipment and a first sewage discharge treatment device, and a first valve and a second valve are arranged on the first sewage discharge pipeline, wherein the first valve is used for connecting or disconnecting the first sewage discharge pipeline; the second valve is used for regulating the flow of the fluid in the first sewage pipeline;

the second sewage discharge pipeline is respectively connected with at least one process pipeline of the dry quenching boiler equipment, which is connected with the steam drum, and a second sewage discharge treatment device, and a third valve is arranged on the second sewage discharge pipeline and used for switching on or switching off the second sewage discharge pipeline;

the control unit is used for keeping the first valve in a continuous opening state and controlling the second valve to adjust the flow of the fluid in the first sewage pipeline according to the quality parameter of the fluid in the steam drum; and controlling the third valve to be opened every a first preset time interval, and controlling the third valve to be closed after a second preset time interval.

2. The blowdown system of claim 1, further comprising a fluid quality monitoring device for detecting a quality parameter of the fluid in the drum in real time and sending the detected quality parameter of the fluid to the control unit;

the control unit is used for comparing the detected quality parameter of the fluid with a set value of the quality parameter, and controlling the second valve to adjust the flow of the fluid in the first sewage pipeline according to the comparison result.

3. The waste disposal system of claim 2, wherein the quality parameter of the fluid comprises a salinity of water; the fluid quality monitoring device comprises a water quality monitoring device, and the water quality monitoring device is used for obtaining the salt content of water by monitoring the conductivity of the water in the steam drum.

4. The waste disposal system of claim 1, wherein the first valve and the third valve each comprise an electrically operated shut-off valve.

5. The waste disposal system of claim 1, wherein said second valve comprises a flow regulating valve.

6. The sewage system according to claim 1, wherein the number of the process pipelines is the same as that of the process pipelines, the second sewage pipelines are connected in a one-to-one correspondence manner, and each second sewage pipeline is provided with the third valve.

7. The waste pipe system of claim 6, wherein the control unit controls the third valve of each of the second waste pipes to be opened from a closed state to a fully opened state and then to be closed to the closed state in sequence every interval of the first preset duration, and the third valve of the previous second waste pipe is closed and opened again every interval of a third preset duration.

8. The waste disposal system of any one of claims 1 to 7, wherein the first waste management device comprises a continuous waste expander, the second waste management device comprises a periodic waste expander, and a plurality of the second waste pipes are connected to the periodic waste expander through a main pipe.

9. The waste pipe system as claimed in any one of claims 2 to 7, wherein a fourth valve is provided on the first waste pipe, the fourth valve being normally open and being manually closed to disconnect the first waste pipe from the first waste treatment device;

and a fifth valve is also arranged on the second sewage draining pipeline, is in a normally open state and can be manually closed to disconnect the second sewage draining pipeline from the second sewage draining treatment device.

10. A dry quenching boiler plant comprising a boiler and a blow down system, characterized in that the blow down system is a blow down system according to any of claims 1-9.

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