JP2017142026A - Method and system for manufacturing heated water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a system for manufacturing heated water effectively utilizing waste heat using a heat pump.SOLUTION: A system for manufacturing heated water 10 has a heat pump 13 absorbing heat from waste heated water, utilizes the heat absorbed by the heat pump 13 as a heating source for heating treatment water, and includes a heat transfer device 14 having a mixing container 141 storing a heat medium, separation means 142 for separating the flowing-out heat medium into two or more so as to each fall in a prescribed flow amount of the heat medium, first circulation means 143 for returning the first heat medium to the mixing container 141 after wasting the heat absorbed by the heat pump 13 to the separated first heat medium, and second circulation means 144 for returning the second heat medium to the mixing container 141 after heating the treatment water by the separated second heat medium.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heating water manufacturing method and manufacturing system, and in particular, a heating water manufacturing method that efficiently uses heat energy by using exhaust heat from exhaust heat water generated in a factory as a heating source. And a manufacturing system.

  A water treatment system such as a pure water production system has various elements for water treatment, for example, ion exchange means, reverse osmosis membrane (RO membrane), filtration means, etc. arranged in a predetermined order to treat the water to be treated. Treated water of desired water quality is obtained by sequential treatment. At this time, the treated water supplied at each treated water or use point is treated water at various temperatures according to demands such as heating and heating depending on the improvement of the treatment efficiency and usage.

  At that time, when heating is necessary, it is generally heated to a desired temperature using a preheater, a heater, or the like. On the other hand, in a water treatment system or in a factory or the like having other equipment, the generated heat is often simply released to the outside and exhausted. As described above, when the exhaust heat treatment is performed on the one hand and the heating (endothermic) process is performed on the other hand, if these are performed independently, energy is wasted.

  Therefore, various devices and the like that use such exhaust heat to heat treated water and effectively use energy have been studied and developed. In particular, when utilizing such exhaust heat, a heat pump is preferably used because of its excellent energy efficiency.

  As such a technique, for example, in a reverse osmosis membrane apparatus in an ultrapure water production plant, for the purpose of improving the permeate amount, stabilizing the amount of water collected, and ensuring a constant temperature at the point of use of production water as ultrapure water, etc. The heat source recovers low-temperature exhaust heat from the reverse osmosis membrane device concentrated water or used production water at the point of use as a heating source, and effectively uses it to heat the raw water to be treated to about 25-30 ° C. An osmotic membrane device system is known (see Patent Document 1).

  Further, in a water treatment system having a plurality of piping sections that connect a plurality of devices adjacent to each other, a heat pump that absorbs heat from one piping section and discharges the absorbed heat to at least one other piping section. A water treatment system that has high energy efficiency and enables stable temperature control is also known (see Patent Document 2).

JP-A-63-4808 International Publication No. 2012/057098

  As described above, a pure water production apparatus that uses exhaust heat effectively using a heat pump is known, but since both use heat exchangers for heat transfer, in heat exchange by the heat exchangers There was a problem that the heat transfer rate did not improve beyond a certain level. Moreover, in heat exchange by a heat exchanger, it is necessary to make the flow rate of the heat medium equal to each other, and the use conditions may be limited in its use.

  Accordingly, the present invention provides a heating water manufacturing system that effectively uses waste heat using a heat pump, improves the heat transfer efficiency by the heat medium, and has a few restrictions on use conditions such as the flow rate of the heat medium, The purpose is to provide a manufacturing method.

  As a result of intensive studies, the present inventors improve the heat transfer efficiency of the heat medium by mixing when using a heat transfer device having two or more heat medium circulation paths between the heat pump and the treatment water. The present invention has been completed.

  That is, the heated water production system of the present invention is a heated water production system that has a heat pump that absorbs heat from waste heat water, and uses the heat absorbed by the heat pump as a heating source for heating treated water, A mixing container for storing the medium, a separating means for separating the heat medium flowing out of the mixing container into two or more so as to become a heat medium having a predetermined flow rate, and a first heat medium separated by the separating means After the heat absorbed by the heat pump is exhausted, the treated water is heated by a first circulation means for returning the first heat medium to the mixing container and a second heat medium separated by the separation means. And a second circulation means for returning the second heat medium to the mixing container, and a heat transfer device.

  The heated water production method of the present invention is a heated water production method in which heat is absorbed from waste heat water using a heat pump, the heat absorbed is used as a heating source, and heated water is obtained by heating treated water, A separation step of separating the heat medium flowing out from the mixing container into two or more so as to become a heat medium having a predetermined flow rate respectively, and the heat absorbed by the heat pump is exhausted to the first heat medium separated by the separation step. After that, the first heat medium is returned to the mixing container, and the treated water is heated by the second heat medium separated by the separation process, and then the second heat medium. The second circulation step of returning the mixture to the mixing container, the first heat medium heated by the exhaust heat of the first circulation step, and the second cooled by the heating of the second circulation step. And the heating medium are uniformly mixed in the mixing container. A mixing step that is characterized by having a.

  According to the heating water manufacturing system and the heating water manufacturing method of the present invention, the heat exhausted in the factory or the like can be effectively utilized as energy for heating the treated water, and heat transfer can be efficiently performed by mixing the heat medium. Therefore, it is possible to reduce energy loss compared to the prior art and achieve energy saving in the entire manufacturing system.

  Further, according to the heating water manufacturing system and the heating water manufacturing method of the present invention, even when the flow rate of the exhaust heat water serving as the heating source and the flow rate of the heating water are greatly different, the heat transfer between them is affected by the difference in the flow rate. The heat exhausted can be effectively used with a simple configuration.

It is a schematic block diagram of the heating water manufacturing system in the 1st Embodiment of this invention. It is a schematic block diagram of the heating pure water manufacturing apparatus to which the heating water manufacturing system of this invention is applied. It is a figure for demonstrating the flow volume in 1st Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or corresponding components are described with the same reference numerals. In addition, these embodiment is an illustration to the last, Comprising: It is not limited to these description.

(First embodiment)
<Heating water production system>
As shown in FIG. 1, the heated water production system according to an embodiment of the present invention uses the exhaust heat of the exhaust heat water flowing through the exhaust hot water flow channel 11 as a heating source and distributes the treated water flow channel 12. A heated water production system 10 that heats treated water to obtain heated water.

  At this time, the heating water production system 10 uses the heat pump 13 that absorbs heat discharged from the exhaust heat water, and further transfers the heat discharged from the heat pump 13 to the treated water by the heat transfer device 14. To do. Here, the heat transfer device 14 includes a mixing container 141 that stores the heat medium, and a separation unit 142 that separates the heat medium flowing out of the mixing container 141 into two or more so that the heat medium has a predetermined flow rate. After the heat absorbed by the heat pump 13 is exhausted to the first heat medium separated by the separation means 142, the first heat medium is returned to the mixing container 141 and separated by the separation means 142. After the treated water is heated by the second heat medium, the heat transfer device 14 includes the second circulation means 144 that returns the second heat medium to the mixing container 141.

  The exhaust hot water flow path 11 is a flow path through which the exhaust hot water serving as a heating source for heating the treated water in this embodiment flows. The waste heat water is, for example, heated water generated in a factory facility or the like, and the heat of waste heat water used here is preferably exhausted. By using the exhausted heat as a heating source when manufacturing heated water, it is possible to effectively use thermal energy. In addition, the waste heat water utilized at this time should just be what can obtain the heat energy required in order to obtain the heating water which it is going to manufacture.

  The treated water channel 12 is a channel through which treated water to be heated flows, and the treated water for heating is heated by the heat exchanger 144a and flows as heated water. As such a treated water flow path 12, for example, a treated water flow path in the vicinity of a use point in the heating water supply apparatus is preferably exemplified. In this case, the heated water obtained by heating the treated water to a desired temperature can be efficiently supplied to the use point, and the heat energy is not wasted.

  The treated water flowing through the treated water flow path 12 is not particularly limited as long as it is a liquid. At this time, it is preferable that the treated water is treated in advance and has desired water quality and characteristics before being supplied to the use point. Here, the treated water is preferably pure water, and more preferably ultrapure water.

  For example, when the treated water is pure water, a part of the pure water production apparatus may be used as the treated water flow path 12. As this pure water production apparatus, for example, as shown in FIG. 2, after the raw water is subjected to a pretreatment that combines adsorption removal and filtration, reverse osmosis membrane treatment, ultrafiltration treatment, ion exchange treatment, etc. The apparatus which has the primary pure water apparatus 21 which removes an ionic component and a total organic carbon (TOC) component in combination can be illustrated. And by processing with the primary pure water apparatus 21, the obtained pure water is stored in the pure water tank 22, and the heated water manufacturing system 10 (process water flow path 12) of this invention is allowed to pass through from the pure water tank 22. After being heated, heated pure water is efficiently obtained by the pure water producing apparatus 20 which is treated with the ultrafiltration membrane (UF) 23 and supplied to the place of use (POU) 24. In the pure water production apparatus 20, pure water that has not been used at the place of use (POU) 24 can be returned to the pure water tank 22 and reused.

  As the primary pure water device 21, as is well known, each device that performs reverse osmosis membrane treatment, ultrafiltration treatment, and ion exchange treatment can be applied. At this time, as an ion exchange device, an ion exchange device in which various ion exchange resins such as a cation exchange resin, an anion exchange resin, and a chelate resin are filled in a container according to the quality of water to be treated and pure water to be produced. Used.

  In FIG. 2, only the heating water production system of the present embodiment is described for heating, but a preheater, a heater, or the like used for the production of conventional heated pure water may be provided. That is, the heated water production system may be used as an auxiliary heating device, and heated pure water having a desired temperature may be obtained by a plurality of heating means.

  Here, pure water is exemplified, but in the ultrapure water production apparatus, ultrapure water is similarly prepared in advance, and this is heated to constitute a device for supplying heated ultrapure water. You can also. Furthermore, functional water such as electrolyzed water, ozone water, and hydrogen water can be supplied as heated.

  The heat pump 13 can be used without particular limitation as long as it is a known heat pump that can efficiently perform heat transfer by heat absorption and exhaust heat by using a refrigerant. The heat pump 13 is a device that can efficiently perform heat transfer while circulating a refrigerant (heat transfer medium). In the heat pump 13, the heat energy is removed from the exhaust heat water to cool the exhaust heat water and take away the extra heat by the refrigerant, and an evaporator 131 that obtains the refrigerant vapor and compresses the refrigerant vapor at high temperature and high pressure. A compressor 132 for generating the refrigerant vapor, a condenser 133 for transferring heat from the high-temperature and high-pressure refrigerant vapor to the heat medium of the heat transfer device 14 to obtain a low-temperature and high-pressure liquid refrigerant by cooling, and a low-temperature and high-pressure refrigerant And an expansion valve 134 that is expanded into a low-temperature and low-pressure refrigerant.

  The refrigerant used here may be any refrigerant as long as it can continuously absorb heat and exhaust heat while repeatedly changing the state between the gas state and the liquid state in the heat pump 13 as described above. Fluorocarbon (HCF), natural refrigerant, etc. are mentioned. The actual refrigerant selection is made based on the superiority of the efficiency that satisfies the design temperature.

  The heat transfer device 14 includes a mixing container 141, a separation unit 142, a first circulation unit 143, and a second circulation unit 144, and is an apparatus that can use the heat exhausted from the heat pump 13 for heating the treated water. It is.

  The mixing container 141 is a container for storing a heat medium in a liquid state. As described later, here, the first heat medium that has circulated through the first circulation means 143 and the second circulation means 144 that has circulated through the first circulation means 144 are used. 2 heat medium. By this mixing, the heat medium accommodated in the mixing container 141 is made uniform. For homogenization, it is preferable to provide a stirring blade or the like in the mixing container 141.

  Further, in the mixing container 141, a partition or the like is provided between a section for supplying and mixing the first heat medium and the second heat medium and a section for storing the uniform heat medium and flowing out from the mixing container. You may make it divide. At this time, for example, the place to which the first heat medium and the second heat medium are supplied is positioned away from the partition dividing the partition, and the partition is overflowed to the partition that flows out from the mixing partition or provided in the partition. The heat medium can be made sufficiently uniform by, for example, a configuration in which the heat medium is transferred through the flow path. When the partitions are provided so as to divide the compartments as described above, the heat medium flowing out from the mixing container 141 is sufficiently uniformed, and the temperature of the heat medium is stabilized.

  The material of the mixing container 141 is not particularly limited as long as it can stably store the heat medium and can be circulated. Stainless steel (for example, SUS304) is used from the viewpoint of temperature resistance and corrosion prevention such as rust. Is preferred. The capacity of the mixing container 141 is for the purpose of mixing and storing the first heat medium and the second heat medium, and the capacity for allowing the passing heat medium to stay in the mixing container 141 for 10 to 20 minutes. preferable.

  The separation unit 142 divides the heat medium supplied from the mixing container 141 into two or more flows so that the heat medium has a predetermined flow rate. In the first embodiment, a case where the heat medium is divided into two will be described as an example. The heat medium separated here circulates through a first circulation means 143 and a second circulation means 144, which will be described later, and performs heat transfer.

At this time, separation of the heat medium can be used without particular limitation as long as the heat medium is divided so as to have a predetermined flow rate. Examples of the separation unit 142 include a pump provided in each of the first circulation unit and the second circulation unit. At this time, each pump may be operated by determining an operating condition so that a predetermined flow rate is obtained in each circulation means. For example, when the first circulation unit 143 and the second circulation unit 144 separate the flow rates of the flowing heat medium so as to increase the flow rate in the first circulation unit 143, the first circulation unit 143 and the second circulation unit 144 are separated. The two pumps 142 provided in the second circulation means 144 are relatively larger in suction force to the pump on the first circulation means 143 side having a larger flow rate than the suction force of the pump on the second circulation means 142 side. Then, the flow rate may be adjusted so as to be separated into a desired flow rate. Alternatively, a valve may be provided at the branching portion, and a desired flow rate may be obtained by adjusting the opening of the valve.
This pump is selected to have a pressure setting that takes into account the pressure loss and the like during the passage of water in the subsequent equipment, and the heat medium temperature resistance and transfer performance.

  The first circulation unit 143 is provided so that the first heat medium separated by the separation unit 142 passes through the condenser 133 of the heat pump 13. By passing through the condenser 133, the first heat medium receives the heat exhausted from the heat pump 13 and is heated, and then is returned to the mixing container 141 and circulated.

  On the other hand, the second circulation means 144 passes through the heat exchanger 144a provided so that the second heat medium separated by the separation means 142 can exchange heat with the treated water in the treated water flow path 12. Provided. By passing through the heat exchanger 144a, the second heat medium heats the treated water and loses heat, and then returns to the mixing container 141 and is circulated. The first circulation means 143 and the second circulation means 144 circulate the heat medium while exchanging heat as described above, and are configured by known piping. The inner diameters of these pipes may be appropriately selected according to the flow rate of the heat medium divided by the separation means 142.

  As described above, the first heat medium and the second heat medium returned and circulated by the first circulation means 143 and the second circulation means 144 are mixed and homogenized in the mixing container 141. The uniformized heat medium flows out of the mixing container 141 again, circulates using the above-described separation into the predetermined amount, the first circulation means and the second circulation means, and then mixed. By repeating this operation, the heated water production system 10 can continuously produce heated water heated to a desired temperature.

  In addition, the heat medium used here should just exist in a liquid state, and can heat-transfer in the heat transfer apparatus 14, for example, water is mentioned and it is used as general cooling water The water to be used (clean water, industrial water, etc.) is preferred. Further, an antiseptic, an antibacterial agent and the like may be added to the heat medium.

<Heating water production method>
The method for producing heated water according to the present invention uses the heat pump to absorb heat from the waste heat water, uses the absorbed heat as a heating source, and heats the treated water by a heated water supply device to obtain heated water. Is the method. In this heating water production method, the heat medium flowing out from the mixing container is separated into two or more so that each heat medium has a predetermined flow rate, and the first heat medium separated in the separation process absorbs heat with the heat pump. After the heat is exhausted, the first heat medium is returned to the mixing container, the treated water is heated by the second heat medium separated by the separation process, and then the second heat medium A second circulation step of returning the mixture to the mixing container, a first heat medium heated by the exhaust heat of the first circulation step, a second heat medium cooled by the heating of the second circulation step, Mixing step of uniformly mixing the components in a mixing container.

  Hereinafter, the heating water manufacturing method will be described by taking the heating water manufacturing system 10 shown in FIG. 1 as an example. The temperature and flow rate of the exhaust heat water, heat medium, and treated water will be described with reference to FIG.

  The method for producing heated water according to an embodiment of the present invention uses the heat exhausted from the exhaust hot water flowing through the exhaust hot water flow path 11 as a heating source, and heats the treated water flowing through the treated water flow path 12. It is a heating water manufacturing method which obtains heating water. Specifically, heat is absorbed from the waste heat water flowing through the waste heat water flow path 11 using the heat pump 13. And a specific heat transfer process is utilized with respect to this heat absorbed, the treated water which distribute | circulates the treated water flow path 12 is heated, and heated water is obtained.

  First, as described above, the heat pump 13 is used to absorb heat from the exhaust heat water flowing through the exhaust heat water flow path 11 by the evaporator 131, and the absorbed heat is exhausted by the condenser 133. This supply / exhaust heat is supply / exhaust heat by a general heat pump. Then, the heat exhausted from the heat pump 13 is used by the heat transfer device 14 to heat the treated water in the heat exchanger 144a, whereby heated water is obtained.

  The operation and action of the heat transfer device 14 are as follows. When the heat medium accommodated in the mixing container 141 flows out of the mixing container 141, it is separated into two or more flows by the separating means 142 so that the heat medium has a predetermined flow rate (separation process).

  Of the heat medium separated here, the heat medium flowing through the first circulation means 143 is referred to as a first heat medium, and the heat medium flowing through the second circulation means 144 is referred to as a second heat medium. The first heat medium receives heat from the heat pump 13 in the condenser 133 of the heat pump 13 by the first circulation means 143, and is returned to the mixing container 141 (first circulation step).

  The second heat medium transfers heat from the second heat medium to the treated water in the heat exchanger 144a provided so that heat exchange is possible between the second circulation means 144 and the treated water flow path 12, and the treated water is treated. Water is heated. At this time, the second heat medium itself is cooled and then returned to the mixing container 141 (second circulation step).

  The first heat medium and the second heat medium returned to the mixing container 141 are mixed and homogenized in the mixing container 141 (mixing step).

  The homogenized heat medium is again subjected to the separation step, the first circulation step, the second circulation step, and the mixing step, so that heated water can be continuously produced and supplied.

Next, the temperature and flow rate of waste heat water, treated water, and heat medium in the heated water production system 10 will be described with reference to FIG.
Here, in the heating water production system 10, when the temperature of the waste heat water flowing through the waste heat water passage 11 and the T _w1, as long as this T _w1 is capable of supplying thermal energy required for heating process water Well, not particularly limited. In addition, the waste heat water temperature _Tw1 is preferably a waste heat water that is generated in a factory and is easy to handle. From such a viewpoint, waste heat water of about 30 to 45 ° C. is preferred, and 30 to 40 degreeC waste heat water is more preferable. Temperature waste heat water after being heat absorption by the heat pump 13 is not particularly limited, for example, those comprising about 5 to 10 ° C. lower temperature than T _w1 can be exemplified.

On the other hand, when the temperature of the treated water is _Th1 , and the temperature of the heated water in which the treated water is heated is _Th2 , the heated water temperature _Th2 is raised to a desired temperature. Here, the desired temperature refers to the temperature of the heating water required in the heating water production system, and is not necessarily the same as the temperature of the heating water finally used.

That is, the temperature _Th2 may be the temperature of the heating water that is finally used, or may be lower or higher than the temperature of the heating water that is used. When it is the temperature of the heating water used, it can be used as it is. If the temperature is lower than the heating water used, a heater may be further provided thereafter so as to heat to a desired temperature. Moreover, when the temperature is higher than the heated water used, when the temperature and the arrival time to the use point are long and the temperature is expected to decrease, the temperature can be expected to decrease. In addition, when temperature is too high, since extra energy consumption is needed by cooling etc., it is unpreferable. Although this _Th2 mainly aims at heating at 40-60 degreeC, according to temperature _Tt1 of the 1st heat medium obtained by the exhaust heat of a heat pump, temperature _{Thh2 of the} heating water obtained is 70 _degreeC It can also be of a degree.

Further, the temperature T _h1 of the treated water may be determined in consideration of the thermal energy received by the treated water from the heat transfer device 14 in order to set the heated water to the target temperature. Although about 20-60 _degreeC is normally used for temperature _{Th1 of} treated water, it is not limited to this.

  The heat transfer device 14 has a good heat transfer efficiency according to the amount of heat exhausted from the condenser 133 of the heat pump 13 and the amount of heat absorbed by the heat exchanger 144a for heating the treated water. And temperature conditions that can be used.

In this heat transfer device 14, the temperature of the heat medium stored in the mixing container 141 is T _t , the temperature of the heat medium obtained by heating the first heat medium through the condenser 133 is T _t1 , when the second heat medium is the temperature of the heat medium obtained is cooled by passing through the heat exchanger 12a _{T t2, and,} the relation of _{T t1> T t> T t2} .

Further, as the flow rate of the heat medium in the heat transfer device 14, when the flow rate per unit time of the first heat medium is V _t1 and the flow rate per unit time of the second heat medium is V _t2 , the above temperature and flow rate Can be expressed as the following equation.
T _t = (T _t1 × V _t1 + T _t2 × V _t2 ) / (V _t1 + V _t2 )

Here, V _t1 is preferably equal to the flow rate V _w per unit time of the exhaust heat water (the flow rate per unit time of the refrigerant circulating in the heat pump is also equivalent), and V _t2 is the treated water. It is preferable to be equivalent to the flow rate V _h per unit time. This is required from the viewpoint of efficiently performing heat transfer in the heat exchanger.

  Usually, when heat transfer is performed by using multiple heat exchangers, the flow rate of waste heat water as a heating source and the flow rate of treated water as a heating target are combined, or a mechanism for adjusting the flow rate is provided. Etc. are necessary. However, in the present invention, the heat transfer device 14 is provided and heat transfer is performed by mixing the heat medium. Therefore, such restrictions and configurations are not necessary, and the exhaust heat water serving as a heating source is not necessary. Even if the flow rate and the flow rate of treated water to be treated are greatly different, the present invention can be applied without any problem.

V _t1 and V _t2 are generally V _t1 ≧ V _t2 , but can be applied at an arbitrary ratio. For example, these flow rate ratios (V _t1 / V _t2 ) are preferably about 1 to 10, and more preferably 1 to 5. In addition, particularly in factories and the like, the flow rate of waste heat water for waste heat is large and the flow rate of treated water is small. Therefore, the heating water production system of the present invention can be easily applied even with such a flow rate ratio. it can.

In addition, instantaneous fluctuations on the heated water side (temperature fluctuations of Th2 and Tt2 that are affected by sudden fluctuations in usage conditions within a short period of time by the user) can be absorbed by the residence volume in the mixing vessel 141, and as a result In particular, the temperature control accuracy of the heated water can be stabilized as compared with the conventional equipment.
Furthermore, by using the heat transfer device 14, even when the usage conditions are greatly changed, such as the circulation flow rate of the heat medium, change of temperature, change of the target such as waste heat water to be used, treated water to be heated, etc. Basically, it can be handled only by changing the circulation means.

  The heating water manufacturing system and the heating water manufacturing method described above can effectively utilize exhaust heat and can efficiently manufacture heating water at low cost.

  About this heating water manufacturing method, more specific conditions are illustrated and demonstrated about preferable temperature and flow volume below.

For example, waste heat water having a temperature of 37 ° C. (T _w1 ) is used, the temperature of the obtained heated water is 45 to 55 ° C. (T _h2 ), and the temperature of the treated water used for producing the heated water is 20 to 55. C. (T _h1 ), flow rate is 110 to 130 m ³ / h (V _h ), and heat pump capable of outputting 2000 to 3500 kW at maximum by supplying power from COP 4 to 10 (for example, plant type or package type) Each condition is illustrated below about the case where a heat pump is operated using a heat recovery high temperature heat pump or the like. In addition, the upper limit value of the above _Th1 and _Th2 is the same as the case of no-load operation in which heating by the heating water production system is not performed during the time when the temperature of the treated water is sufficiently high. It is taken into consideration.

At this time, the heat transfer device 14, 460~580m ³ / h, providing a sufficient amount of heat medium to be circulated at a flow rate of 120~130m ³ / h to the process water flow path 12 side to the heat pump 13 side. As a mixing container, a container having a capacity of 50 m ³ is used, and a stirring means is provided inside so that the first heat medium and the second heat medium can be efficiently and sufficiently mixed. After using clean water as a heat medium and making it a uniform mixed solution in a mixing container, the heat medium is flowed out, and the heat medium is separated and circulated by the separation means at the above flow rate. At this time, a pump (for example, a heat resistant low NPSH pump) provided on the first circulation means side is sent out at a pressure of 0.2 MPa, while a pump (for example, a heat resistant low NPSH pump) provided on the second circulation means side. ), The first heat medium and the second heat medium are circulated in the respective circulation channels.
In the above description, in the pump on the first circulation means side, the flow rate of the heat medium is larger but the delivery pressure is lower than the pump on the second circulation means side. The heat pump is arranged in the vicinity (about several meters) on the same floor with respect to the position, and the heating part (heat exchanger 144a) of the heated water is located at a distant high place (height tens of meters, distance tens to hundreds of meters) ) Is assumed. The delivery pressure may be appropriately set in consideration of the device configuration so that the separated heat medium can be circulated smoothly.

At this time, as the temperature of the heat medium, T _t is 55 to 60 ° C., T _t1 is 55 to 65 ° C., and T _t2 is 35 to 60 ° C., so that exhaust heat can be efficiently used. Thus, heated water having a desired temperature (45 to 55 ° C.) can be obtained. Note that the lower limit value of T _t and T _{t1 and} the upper limit value of T _t and T _t2 are the same temperature, respectively, during the time when the heat transfer device temperature of the treated water is sufficiently high. The case of no-load operation in which heating is not performed by the heated water production system is considered.

  In addition, when a conventionally known heat exchanger is used instead of the heat transfer device 14, heating water can be produced with the same configuration by providing a tank for each circulation path and adjusting the flow rate. However, even if the temperature condition of the heat medium in the circulation path between the heat pump and the heat exchanger is the same (for example, 60 ° C. → 65 ° C.), the circulation path for heating the treated water due to the energy loss due to the heat exchanger It is assumed that the temperature of the heating medium in this is only about 55 ° C., and the heating water to be obtained is about 50 ° C., and heating water having a temperature lower than that of the present invention when the same conditions are used.

  Therefore, the heating water manufacturing system of this embodiment can obtain desired heating water by efficiently using exhaust heat, and can achieve excellent energy saving.

  In the above embodiment, the separation unit 141 of the heat transfer device 14 has been described as an example in which the heat medium is separated into two so as to have a predetermined flow rate, but this is separated into three or more heat media. May be. When separating the heat medium into three or more, one is circulated through the first circulation means 143 and one is circulated through the second circulation means 144 under the same conditions as described above. Then, the remaining one heat medium may be returned and circulated to the mixing container 141 in the same manner as the first circulation means 143 or the second circulation means 144 by a third circulation means (not shown).

  At this time, like the first circulation means 143, the third circulation means receives heat energy from two or more places so as to receive waste heat from the waste heat water in other factory equipment and transfers heat. Also good. Further, like the second circulation means 144, the third circulation means may supply the heated water at two or more locations by heating the treated water to produce heated water. Furthermore, you may make it receive heat energy in two or more places, and supply heating water in two or more places.

DESCRIPTION OF SYMBOLS 10 ... Heated water manufacturing system, 11 ... Waste heat water flow path, 12 ... Treated water flow path, 13 ... Heat pump, 131 ... Evaporator, 132 ... Compressor, 133 ... Condenser, 134 ... Expansion valve, 14 ... Heat transfer device, 141 ... mixing container, 142 ... separation means, 143 ... first circulation means, 144 ... second circulation means

Claims (10)

A heating water production system having a heat pump that absorbs heat from waste heat water, and using the heat absorbed by the heat pump as a heating source for heating the treated water,
A mixing container that contains a heat medium, a separating means that separates the heat medium flowing out of the mixing container into two or more so as to become a heat medium having a predetermined flow rate, and a first heat medium separated by the separating means After the heat absorbed by the heat pump is exhausted, the treated water is discharged by a first circulation means for returning the first heat medium to the mixing container and a second heat medium separated by the separation means. A heated water production system comprising: a heat transfer device having a second circulation means for returning the second heat medium to the mixing container after heating.   The heated water production system according to claim 1, wherein the heat medium is water. The separation means sets the flow rate per unit time of the first heat medium (V _t1 ) and the flow rate of the second heat medium per unit time (V _t2 ) different from each other. Item 3. A heated water production system according to item 1 or 2. The separation means _sets a flow rate ratio (V _t1 / V _t2 ) between the flow rate per unit time of the first heat medium (V _t1 ) and the flow rate per unit time of the second heat medium (V _t2 ). It is set as 1-10, The heating water manufacturing system of any one of Claims 1-3 characterized by the above-mentioned. It is a heated water production method for obtaining heat water by performing heat absorption from waste heat water using a heat pump, using the absorbed heat as a heating source, and heating treated water.
A separation step of separating the heat medium flowing out from the mixing container into two or more so as to become a heat medium having a predetermined flow rate, respectively;
A first circulation step of exhausting heat absorbed by the heat pump to the first heat medium separated by the separation step, and then returning the first heat medium to the mixing container;
A second circulation step of heating the treated water with the second heat medium separated by the separation step and then returning the second heat medium to the mixing container;
The first heat medium heated by the exhaust heat of the first circulation step and the second heat medium cooled by the heating of the second circulation step are uniformly mixed in the mixing container. A mixing step;
A method for producing heated water, comprising:   The method for producing heated water according to claim 5, wherein the heat medium is water. The heating according to claim 5 or 6, wherein a flow rate (V _t1 ) per unit time of the first heat medium and a flow rate (V _t2 ) per unit time of the second heat medium are different from each other. Water production method. The flow rate ratio (V _t1 / V _t2 ) between the flow rate per unit time (V _t1 ) of the first heat medium and the flow rate (V _t2 ) per unit time of the second heat medium is 1 to 10 It exists, The heating water manufacturing method of any one of Claims 5-7 characterized by the above-mentioned.   The heated water manufacturing method according to any one of claims 5 to 8, wherein the treated water is pure water or ultrapure water.   The method for producing heated water according to any one of claims 5 to 9, wherein the heated water is 45 to 55 ° C.

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