JP2023067442A - Steam supply equipment - Google Patents

Abstract

To provide steam supply equipment enabling reduction of the amount of CO2 emission and capable of stably supplying high-temperature steam.SOLUTION: Steam supply equipment 30 according to an embodiment pertains to a power generation facility 10 that includes a boiler 11, a steam turbine 12, a power generator 13, a condenser 14, and a feed-water pump 15. The steam supply equipment 30 comprises: a heat pump system 40 including an evaporator 41, a refrigerant compressor 42, a heat exchanger 43, and an expansion section 44; a water supply pipe 43a for introducing water into the heat exchanger 43; a steam discharge pipe 43b for discharging steam from the heat exchanger 43, the steam being generated by heating the water from the water supply pipe 43a by a refrigerant; a fluid introduction pipe 41a for introducing fluid giving heat to the refrigerant in the evaporator 41, into the evaporator 41; a fluid discharge pipe 41b for discharging the fluid from the evaporator 41; and a steam extraction pipe 60 for extracting steam from the steam turbine 12, wherein the steam introduced to the steam discharge pipe 43b and the steam extraction pipe 60 is introduced to a steam utilization section 80.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to steam supply equipment.

Manufacturing plants use a large amount of steam when manufacturing products. In such a manufacturing plant, for example, steam extracted from an in-house power generation facility is introduced into the manufacturing plant.

FIG. 12 is a system diagram of a conventional private power generation facility 300. As shown in FIG. As shown in FIG. 12 , the private power generation facility 300 includes a boiler 310 , a steam turbine 311 , a generator 312 , a condenser 313 , a feedwater pump 314 and an extraction pipe 315 .

The steam generated by the boiler 310 is introduced into the steam turbine 311 and rotationally drives the steam turbine 311 by expansion work. A generator 312 connected to the steam turbine 311 is rotationally driven together with the steam turbine 311 to generate power.

The steam exhausted from the steam turbine 311 is cooled by the cooling water 313a in the condenser 313 and becomes condensed water. The condensate is pressurized by the feedwater pump 314 and introduced into the boiler 310 .

Also, steam extracted from a predetermined turbine stage of the steam turbine 311 is introduced into the extraction pipe 315 . After the pressure and temperature of the extracted steam are adjusted, it is sent to the manufacturing process 316 of the manufacturing plant, for example.

Here, so-called fossil fuels such as coal, heavy oil, and natural gas are generally used as fuel for the boiler 310 . _CO2 produced by burning fossil fuels contributes to global warming. Therefore, it is required to reduce the amount of fossil fuels burned.

Moreover, as conventional steam generating equipment, there is steam generating equipment using a heat pump cycle. Since this steam generation facility does not have a boiler, it does not emit _CO2 .

FIG. 13 is a system diagram of a conventional steam generation facility 330 using a heat pump cycle. As shown in FIG. 13 , steam generation equipment 330 includes a compressor 320 , a condenser 321 , an expansion valve 322 and an evaporator 323 . Compressor 320 is driven by drive device 320a, for example.

A refrigerant flows through the heat pump cycle. In the evaporator 323, the refrigerant takes heat from the introduced external fluid 323a and evaporates. The temperature of the external fluid 323b that has passed through the evaporator 323 is lower than the temperature of the introduced external fluid 323a. Waste heat from a factory or the like is used as the external fluid.

The low pressure refrigerant vapor evaporated in the evaporator 323 becomes high temperature and high pressure in the compressor 320 . The vapor of the refrigerant that has become high temperature and high pressure in the compressor 320 is introduced into the condenser 321 . The vapor of the refrigerant releases heat to water 321a introduced into the condenser 321 and is cooled. The water 321 a boils to become steam 321 b and is discharged from the condenser 321 .

The refrigerant whose temperature has decreased in the condenser 321 is throttle-expanded by the expansion valve 322 . Then, the refrigerant that has become liquid due to the reduction in pressure and temperature is guided to the evaporator 323 .

The conventional steam generation facility 330 using the heat pump cycle described above is employed in a relatively small steam utilization facility.

Japanese Patent No. 4982985

In the private power generation facility, steam corresponding to, for example, 10 to 95% of the main steam introduced into the steam turbine 311 is extracted by an extraction pipe 315 and supplied to a manufacturing process 316 such as a manufacturing plant. Thus, relatively large amounts of steam are used in manufacturing process 316 .

In addition, in the conventional private power generation facility 300 that uses the extracted steam for the manufacturing process 316, fuel is consumed in the boiler 310 considering the flow rate of the extracted steam. That is, since all the extracted steam is generated in the boiler 310, the amount of _CO2 emissions increases according to the flow rate of the extracted steam.

Further, in order to stably generate the above-described steam flow rate in the conventional steam generation facility 330 using a heat pump cycle, it is necessary to increase the refrigerant flow rate. As a result, the driving power consumption of the driving device 320a of the compressor 320 that compresses the refrigerant increases.

Further, since water 321a is converted into steam 321b in the condenser 321, the evaporator 323 always requires a large amount of high-temperature external fluid 323a. However, it is difficult for the single steam generating facility 330 using the above-described conventional heat pump cycle to stably supply the entire amount of steam used in the manufacturing plant.

The problem to be solved by the present invention is to provide a steam supply facility capable of reducing CO ₂ emissions and stably supplying high-temperature steam.

The steam supply facility of the embodiment includes a boiler that generates steam, a steam turbine driven by the generated steam, a generator that generates power by driving the steam turbine, and a condenser that condenses the steam discharged from the steam turbine. and attached to a power generation facility equipped with a feedwater pump for pressure-feeding condensate to the boiler.

The steam supply equipment includes an evaporator that evaporates the refrigerant, a refrigerant compressor that compresses the evaporated refrigerant, a heat exchanger that radiates the heat of the compressed refrigerant, and an expansion section that expands the radiated refrigerant, and the refrigerant circulates. A heat pump system, a steam extraction pipe for extracting steam from the steam turbine, a water supply pipe for introducing water into the heat exchanger, and heat generated by applying the amount of heat radiated by the refrigerant to the water introduced from the water supply pipe. a steam discharge pipe for discharging the vapor from the heat exchanger, a fluid introduction pipe for introducing into the evaporator a fluid that gives heat to the refrigerant in the evaporator, and a fluid discharge pipe for discharging the fluid from the evaporator and The steam supply facility supplies the steam introduced into the extraction pipe and the steam discharge pipe to the steam utilization section.

1 is a system diagram of a steam-power generation facility equipped with the steam supply facility of the first embodiment; FIG. FIG. 2 is a system diagram of a steam-power generation facility provided with another steam supply facility of the first embodiment; FIG. 2 is a system diagram of a steam-power generation facility equipped with a steam supply facility according to a second embodiment; FIG. 10 is a system diagram of a steam-power generation facility equipped with a steam supply facility according to a third embodiment; It is a system diagram of a steam-power generation facility equipped with a steam supply facility of a fourth embodiment. FIG. 11 is a system diagram of a steam-power generation facility equipped with a steam supply facility according to a fifth embodiment; 1 is a system diagram of a steam-power generation facility comprising a combined power generation facility and a steam supply facility of the first embodiment; FIG. FIG. 11 is a system diagram of a steam-power generation facility equipped with a steam supply facility according to a seventh embodiment; FIG. 11 is a system diagram of a steam-power generation facility equipped with a steam supply facility of an eighth embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is a system diagram of steam equipment provided with boiler steam supply equipment and the steam supply equipment of 1st Embodiment. FIG. 11 is a diagram schematically showing the configuration of a temperature-pressure adjusting mechanism and a steam utilization section provided in the steam supply facility shown in FIG. 10; It is a system diagram of the conventional private power generation equipment. It is a system diagram of the conventional steam generation equipment using a heat pump cycle.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a system diagram of a steam-power generation facility 1 equipped with a steam supply facility 30 of the first embodiment.

As shown in FIG. 1 , the steam-power generation facility 1 includes a power generation facility 10 having a power generation function and a steam supply facility 30 that supplies steam to a steam utilization section 80 .

First, the power generation equipment 10 will be described.

The power generation facility 10 includes a boiler 11 , a steam turbine 12 , a generator 13 , a condenser 14 and a feedwater pump 15 . These are sequentially connected via piping.

The boiler 11 is a steam generator that generates steam. The boiler 11 has, for example, a combustor (not shown). The boiler 11 generates steam using combustion gas generated in the combustor as a heat source. As fuel for the boiler 11, so-called fossil fuels such as coal, heavy oil, and natural gas are generally used.

The steam turbine 12 is driven by steam generated by the boiler 11 . The generator 13 is connected to the steam turbine 12 and generates power by driving the steam turbine 12 .

The condenser 14 condenses the steam discharged from the steam turbine 12 into condensed water. The condenser 14 includes a cooling medium introduction pipe 14a that introduces a cooling medium for cooling the steam, and a cooling medium discharge pipe 14b that discharges the cooling medium that has cooled the steam. The feed water pump 15 pumps the condensate to the boiler 11 .

In the power generation facility 10 described above, steam generated by the boiler 11 is introduced into the steam turbine 12 . The steam turbine 12 is rotationally driven by the expansion work of the introduced steam. A generator 13 connected to the steam turbine 12 is rotationally driven together with the steam turbine 12 to generate power.

Steam discharged from the steam turbine 12 is directed to a condenser 14 . The steam guided to the condenser 14 is cooled by the cooling medium introduced from the cooling medium introduction pipe 14a to become condensed water. The cooling medium that has cooled the steam is discharged from the cooling medium discharge pipe 14b. The temperature of the cooling medium discharged from the cooling medium discharge pipe 14b is higher than the temperature of the cooling medium introduced from the cooling medium introduction pipe 14a.

Condensate formed in the condenser 14 is pressurized by the feed water pump 15 and introduced into the boiler 11 .

Next, the steam supply facility 30 will be described.

The steam supply facility 30 includes a heat pump system 40 , a steam compressor 45 and an extraction pipe 60 .

The heat pump system 40 includes an evaporator 41 , a refrigerant compressor 42 , a heat exchanger 43 and an expansion section 44 . These are sequentially connected via piping. A refrigerant circulates in the piping. The refrigerant compressor 42 has a driving device 42a.

The evaporator 41 evaporates the liquid refrigerant by heat exchange between the fluid introduced from the outside and the refrigerant. The evaporator 41 includes a fluid introduction pipe 41a and a fluid discharge pipe 41b. The fluid introduction pipe 41 a introduces into the evaporator 41 a fluid that gives heat to the refrigerant flowing through the refrigerant pipe. The fluid discharge pipe 41 b discharges the fluid obtained by heating the refrigerant from the evaporator 41 .

The temperature of the refrigerant discharged from the fluid discharge pipe 41b is lower than the temperature of the refrigerant introduced from the fluid introduction pipe 41a. Further, the fluid is introduced from the outside into the fluid introduction pipe 41a by a pumping device such as a pump (not shown).

Here, examples of the fluid introduced into the evaporator 41 from the fluid introduction pipe 41a include seawater, river water, and air. Alternatively, exhaust gas from the boiler 11 may be used as the fluid introduced into the evaporator 41 . Note that the fluid introduced into the evaporator 41 is not limited to these, and any fluid having a temperature higher than the temperature of the refrigerant flowing through the evaporator 41 may be used. That is, the fluid that is introduced into the evaporator 41 may be any fluid that has a heat quantity enough to evaporate the refrigerant in the evaporator 41 .

When the fluid is the same medium as the cooling medium of the condenser 14, for example, part of the cooling medium discharged from the cooling medium discharge pipe 14b of the condenser 14 is introduced into the fluid introduction pipe 41a together with the fluid. good too. Mixing a hotter coolant than the fluid improves the coefficient of performance (COP) of the heat pump system 40 .

Further, when the fluid is the same medium as the cooling medium of the condenser 14, for example, the fluid discharged from the fluid discharge pipe 41b of the evaporator 41 may be introduced into the cooling medium introduction pipe 14a together with the cooling medium. When the temperature of the fluid discharged from the fluid discharge pipe 41b is lower than the temperature of the cooling medium, the temperature of the cooling medium introduced into the condenser 14 becomes lower. This improves the thermal efficiency of the power generation equipment 10 .

The refrigerant compressor 42 compresses the refrigerant evaporated in the evaporator 41 into a high-temperature, high-pressure refrigerant. The refrigerant compressor 42 is driven by a driving device 42a.

The heat exchanger 43 generates steam by heat exchange between water introduced from the outside and the refrigerant. The heat exchanger 43 includes a water supply pipe 43a and a steam discharge pipe 43b. The water supply pipe 43a introduces into the heat exchanger water that becomes steam through heat exchange with the refrigerant. Water is introduced from the outside into the water supply pipe 43a by a pumping device such as a pump (not shown).

The steam discharge pipe 43 b discharges the steam generated by imparting the amount of heat radiated by the refrigerant to the water from the heat exchanger 43 and supplies the steam to the steam utilization section 80 . A steam compressor 45 is interposed in the steam discharge pipe 43b.

The expansion section 44 expands the refrigerant that has released heat in the heat exchanger 43 to reduce the temperature and pressure. Note that the refrigerant that has passed through the expansion portion 44 becomes a liquid. The expansion section 44 may have any structure as long as it expands the refrigerant to lower the temperature and pressure. An expansion valve, an orifice, or the like, for example, is used as the expansion portion 44 .

The steam compressor 45 is interposed in the steam discharge pipe 43b. Then, the steam discharged from the heat exchanger 43 is compressed to raise the temperature and pressure. In the steam compressor 45 , the temperature and pressure of steam are adjusted, for example, in consideration of the temperature and pressure of steam required in the steam utilization section 80 . The vapor compressor 45 is driven by a driving device 45a. An electric heater, for example, may be used as means for heating the steam.

Here, as the steam utilization unit 80, for example, a manufacturing process in a manufacturing factory can be exemplified. Note that the steam utilization unit 80 is not limited to this, and is included in the steam utilization unit 80 as long as it is a steam utilization unit that utilizes steam extracted from the steam turbine 12 or the like.

The extraction pipe 60 extracts steam from the steam turbine 12 and supplies it to the steam utilization section 80 . The extraction pipe 60 is connected to the steam turbine 12 so as to extract steam from a predetermined turbine stage in consideration of the temperature and pressure of the steam required in the steam utilization section 80 .

As described above, steam is supplied to the steam utilization section 80 from the steam discharge pipe 43b and the extraction pipe 60. As shown in FIG.

The steam discharge pipe 43b and the extraction pipe 60 may be provided with a temperature-pressure adjustment mechanism (not shown) that finally adjusts the temperature and pressure of the steam to the temperature and pressure required by the steam utilization section 80. . The temperature-pressure adjustment mechanism is composed of, for example, a compressor, a compressor and an electric heater, or a turbine.

Note that when the steam introduced from the steam discharge pipe 43b and the extraction pipe 60 into the steam utilization section 80 is adjusted to satisfy the steam temperature and pressure required by the steam utilization section 80, the temperature-pressure No adjustment mechanism is required.

In the steam supply facility 30 described above, the liquid refrigerant is heated and evaporated by heat exchange with the fluid introduced into the evaporator 41 through the fluid introduction pipe 41a. The fluid obtained by heating the refrigerant is discharged to the outside from the fluid discharge pipe 41b.

The evaporated refrigerant is led to refrigerant compressor 42 . The refrigerant becomes high temperature and high pressure in the refrigerant compressor 42 . The high-temperature, high-pressure refrigerant is introduced into the heat exchanger 43 . The temperature of the refrigerant introduced into the heat exchanger 43 is lowered by heat exchange with water introduced into the heat exchanger 43 from the water supply pipe 43a. On the other hand, in the heat exchanger 43, the water is boiled by the amount of heat given by the refrigerant to become steam.

The refrigerant whose temperature has decreased is guided from the heat exchanger 43 to the expansion section 44 . The refrigerant is throttle-expanded in the expansion section 44 and becomes a low-pressure, low-temperature state. The refrigerant that has passed through the expansion portion 44 becomes liquid.

The liquid refrigerant circulates through the evaporator 41 again.

Here, the steam generated in the heat exchanger 43 is supplied to the steam utilization section 80 through the steam discharge pipe 43b. At that time, the temperature and pressure of the steam flowing through the steam discharge pipe 43b are increased by passing through the steam compressor 45 .

Also, steam extracted from a predetermined turbine stage of the steam turbine 12 is supplied to the steam utilization section 80 through the extraction pipe 60 .

By providing the steam supply facility 30 of the above-described first embodiment, the steam necessary for the steam utilization unit 80 can be supplied from the steam supply facility 30 together with the steam extracted from the steam turbine 12 . Therefore, the flow rate of fossil fuel consumed in the boiler 11 can be reduced compared to the conventional in-house power generation facility in which the entire flow rate of steam required in the steam utilization section 80 is supplied by extraction from the steam turbine 12. .

That is, by providing the steam supply facility 30 , the flow rate of the steam supplied from the steam supply facility 30 can be reduced in the flow rate of the steam generated by the boiler 11 of the power generation facility 10 . As a result, the flow rate of fossil fuel consumed in the boiler 11 can be reduced, and the amount of CO ₂ emissions can be reduced.

Further, in the steam supply facility 30, in the case where the evaporator 41 utilizes the heat quantity of a fluid such as sea water, river water, or the atmosphere, which is natural energy, the heat quantity for evaporating the refrigerant is stably obtained. be able to. As a result, in the heat exchanger 43, the flow rate of steam to be supplied to the steam utilization section 80 can be stably generated. It should be noted that the same effects can be obtained as long as the fluid can be stably supplied other than the above-described fluid made of natural energy.

Furthermore, the steam supply equipment 30 can be easily attached to the existing power generation equipment. As a result, existing power generation equipment can be effectively used, and a highly reliable steam supply function can be provided.

Here, FIG. 2 is a system diagram of the steam-power generation facility 1 provided with another steam supply facility 30 of the first embodiment.

As shown in FIG. 2, the steam supply facility 30 may include a drain pipe 90 that introduces the drain generated after steam is used in the steam utilization section 80 into the fluid introduction pipe 41a. The drain is formed by condensation of the steam introduced into the steam utilization section 80 . The drain is pressure-fed to the fluid introduction pipe 41a by a pump (not shown) or the like.

This configuration is applied when the temperature of the drain introduced into the fluid introduction pipe 41a is higher than the temperature of the fluid introduced into the evaporator 41 from the fluid introduction pipe 41a.

By introducing drain having a temperature higher than that of the fluid into the evaporator 41 together with the fluid in this way, a fluid having a temperature higher than that obtained by directly introducing, for example, seawater, river water, or air can be obtained. This improves the coefficient of performance (COP) of the heat pump system 40 .

(Second embodiment)
FIG. 3 is a system diagram of a steam-power generation facility 1 equipped with a steam supply facility 31 of the second embodiment. In the following embodiments, the same components as those of the steam-power generation facility 1 equipped with the steam supply facility 30 of the first embodiment are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified. .

A steam supply facility 31 of the second embodiment has the same configuration as that of the steam supply facility 30 of the first embodiment, except for the fluid introduction system to the fluid introduction pipe 41 a of the evaporator 41 . Therefore, here, the configuration of the fluid introduction system to the fluid introduction pipe 41a will be mainly described.

As shown in FIG. 3 , the inlet end of the fluid introduction pipe 41 a of the evaporator 41 is connected to the outlet end of the cooling medium discharge pipe 14 b of the condenser 14 . A discharge pipe 41c is connected to the fluid introduction pipe 41a. The exit end of the discharge pipe 41c is open to the outside. The discharge pipe 41c discharges part of the cooling medium discharged from the condenser 14 to the outside. The discharge pipe 41c is provided with a flow control valve (not shown) for adjusting the flow rate of the cooling medium to be discharged.

The cooling medium obtained by cooling the steam in the condenser 14 is introduced as a fluid into the evaporator 41 through the fluid introduction pipe 41a. The flow rate of the fluid introduced into the evaporator 41 is adjusted according to, for example, the amount of heat given to the refrigerant in the evaporator 41 .

Here, the cooling medium in the condenser 14 is, for example, seawater, river water, or air. The temperature of the cooling medium discharged from the cooling medium discharge pipe 14b of the condenser 14 is higher than the temperature of the cooling medium flowing into the cooling medium introduction pipe 14a by depriving the steam of the condenser 14 of heat. Therefore, the evaporator 41 is introduced with a fluid (cooling medium) having a temperature higher than that of the fluid directly introduced from the outside.

In the evaporator 41, the liquid refrigerant is heated and evaporated by heat exchange with the fluid introduced into the evaporator 41 through the fluid introduction pipe 41a. The fluid obtained by heating the refrigerant is discharged to the outside from the fluid discharge pipe 41b. The temperature of the fluid discharged from the fluid discharge pipe 41b is lower than the temperature of the fluid introduced from the cooling medium discharge pipe 14b into the fluid introduction pipe 41a.

According to the steam supply facility 31 of the second embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

In addition, in the steam supply facility 31, by using the cooling medium discharged from the condenser 14 as the fluid to be introduced into the evaporator 41, as the fluid, for example, seawater, river water, or air can be used instead of directly introducing A high temperature fluid is obtained. This improves the coefficient of performance (COP) of the heat pump system 40 .

Furthermore, in the steam-power generation facility 1 having the steam supply facility 31, heat is removed from the cooling medium discharged from the condenser 14 in the evaporator 41, thereby discharging the low-temperature cooling medium (fluid) to the outside. As a result, temperature rises in seawater, rivers, air, and the like from which the cooling medium (fluid) is discharged can be suppressed, and effects on the biological environment and weather environment can be prevented.

In the second embodiment, for example, the fluid discharged from the fluid discharge pipe 41b of the evaporator 41 is mixed with the cooling medium of the condenser 14 and introduced into the cooling medium introduction pipe 14a as a mixed cooling medium. good too. When the temperature of the fluid discharged from the fluid discharge pipe 41b is lower than the temperature of the cooling medium introduced into the condenser 14 from the outside, the temperature of the mixed cooling medium introduced into the condenser 14 is It will be lower than the temperature of the cooling medium introduced into the condenser 14 . This improves the thermal efficiency of the power generation equipment 10 .

Note that the steam supply facility 31 may also include a drain pipe 90 for introducing the drain generated after the steam is used in the steam utilization section 80 into the fluid introduction pipe 41a, as shown in FIG. 2 in the first embodiment. good.

(Third Embodiment)
FIG. 4 is a system diagram of a steam-power generation facility 1 equipped with a steam supply facility 32 of the third embodiment.

In the steam supply facility 32 of the third embodiment, except for the fluid introduction system to the fluid introduction pipe 41a of the evaporator 41 and the fluid discharge system from the fluid discharge pipe 41b of the evaporator 41, is the same as the configuration of the steam supply facility 30 in the form of Therefore, here, the configuration of the fluid introduction system to the fluid introduction pipe 41a and the fluid discharge system from the fluid discharge pipe 41b will be mainly described.

As shown in FIG. 4 , the steam turbine 12 is provided with a steam lead-out pipe 100 that leads steam to the evaporator 41 . The inlet end of the fluid introduction pipe 41 a of the evaporator 41 is connected to the outlet end of the vapor outlet pipe 100 . Therefore, the steam extracted from the steam turbine 12 is introduced as a fluid into the evaporator 41 through the fluid introduction pipe 41a. That is, high-temperature steam extracted from the steam turbine 12 is introduced into the evaporator 41 .

Also, the outlet end of the fluid discharge pipe 41 b of the evaporator 41 is connected to the water supply pipe 20 between the condenser 14 and the water supply pump 15 .

In the evaporator 41, the liquid refrigerant is heated and evaporated by heat exchange with the fluid introduced into the evaporator 41 through the fluid introduction pipe 41a. The steam that heats the refrigerant condenses into water. Then, the water passes through the fluid discharge pipe 41 b and is led to the water supply pipe 20 between the condenser 14 and the water supply pump 15 .

According to the steam supply facility 32 of the third embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

Further, in the steam supply facility 32, by using the steam extracted from the steam turbine 12 as the fluid to be introduced into the evaporator 41, the temperature is higher than that obtained by introducing, for example, seawater, river water, or air as the fluid. of fluid is obtained. This improves the coefficient of performance (COP) of the heat pump system 40 .

In the steam supply facility 32, the steam introduced into the evaporator 41 can be returned to the water supply system of the power generation facility 10 as water. Thereby, the amount of circulating water in the water supply system of the power generation equipment 10 can be maintained.

Although an example of introducing the steam extracted from the steam turbine 12 into the evaporator 41 through the steam lead-out pipe 100 is shown here, the configuration is not limited to this. For example, the steam outlet pipe 100 may be provided to connect, for example, the exhaust pipe of the steam turbine 12 and the fluid inlet pipe 41a. In this case, part of the steam exhausted from the steam turbine 12 is introduced into the evaporator 41 through the fluid introduction pipe 41a.

Also in this case, a fluid having a higher temperature than seawater, river water, air, or the like can be introduced into the evaporator 41 as the fluid. This improves the coefficient of performance (COP) of the heat pump system 40 .

(Fourth embodiment)
FIG. 5 is a system diagram of a steam-power generation facility 1 having a steam supply facility 33 of the fourth embodiment.

A steam supply facility 33 of the fourth embodiment has the same configuration as that of the steam supply facility 30 of the first embodiment except that a drain pipe 110 is provided. Therefore, the drain pipe 110 will be mainly described here.

As shown in FIG. 5 , the steam supply facility 33 includes a drain pipe 110 that introduces drain (water) generated after steam is used in the steam utilization section 80 into the water supply pipe 43 a of the heat exchanger 43 . The drain pipe 110 connects a drain recovery portion (not shown) in the steam utilization portion 80 and the water supply pipe 43a.

Note that the drain is water formed by condensation of the steam introduced into the steam utilization section 80 . The temperature of this drain is higher than the temperature of the water supplied to the water supply pipe 43a. The drain is pressure-fed to the water supply pipe 43a by a pump (not shown) or the like.

In the steam supply facility 33, mixed water of water supplied to the water supply pipe 43a and water introduced from the steam utilization section 80 to the water supply pipe 43a through the drain pipe 110 was introduced into the heat exchanger 43. It exchanges heat with high temperature and high pressure refrigerant. The mixed water boils and turns into steam due to the amount of heat given by the refrigerant.

According to the steam supply facility 33 of the fourth embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

Further, in the steam supply facility 33, the temperature of the water introduced from the drain pipe 110 into the water supply pipe 43a is higher than the temperature of the water introduced into the water supply pipe 43a. Therefore, the temperature of the mixed water introduced into the heat exchanger 43 is higher than the temperature of the water introduced from the outside into the water supply pipe 43a.

Therefore, the amount of heat given from the refrigerant to the mixed water in the heat exchanger 43 to generate steam can be reduced. That is, in the refrigerant compressor 42, the power of the driving device 42a can be reduced when the refrigerant is compressed into high-temperature, high-pressure vapor. This improves the coefficient of performance (COP) of the heat pump system 40 .

Further, by using the condensed water of the steam introduced into the steam utilization section 80 as part of the water introduced into the water supply pipe 43a, the amount of water supplied to the water supply pipe 43a from the outside can be reduced.

It should be noted that the steam supply facility 33 of the fourth embodiment may also have the same configuration of the fluid introduction system to the fluid introduction pipe 41a as the steam supply facility 31 (FIG. 3) of the second embodiment. good.

(Fifth embodiment)
FIG. 6 is a system diagram of the steam-power generation facility 1 provided with the steam supply facility 34 of the fifth embodiment.

In the steam supply facility 34 of the fifth embodiment, except for the configuration of the steam supply system that supplies the steam from the extraction pipe 60 and the steam from the steam discharge pipe 43b to the separate steam utilization units 80A and 80B, respectively, The configuration is the same as that of the steam supply facility 30 of the first embodiment. Therefore, the configuration of the steam supply system will be mainly described here.

As shown in FIG. 6 , the steam extracted from the steam turbine 12 is introduced into the steam utilization section 80A via the extraction pipe 60 . Also, the steam generated in the heat exchanger 43 is introduced into the steam utilization section 80B through the steam discharge pipe 43b.

Incidentally, the extraction pipe 60 and the steam discharge pipe 43b may each be provided with a temperature-pressure adjustment mechanism for adjusting the steam to a predetermined temperature and pressure.

According to the steam supply facility 34 of the fifth embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

Further, in the steam supply facility 34, steam can be supplied to different steam utilization units through separate steam supply systems. For example, by installing the heat pump system 40 at a position close to the steam utilization section 80B, heat loss in the steam supply system can be reduced.

In addition, by supplying steam through separate steam supply systems, it is possible to supply steam with different temperatures and pressures to each steam utilization section.

It should be noted that the steam supply facility 34 of the fifth embodiment may also have the same configuration of the fluid introduction system to the fluid introduction pipe 41a as the steam supply facility 31 (FIG. 3) of the second embodiment. good.

(Sixth embodiment)
FIG. 7 is a system diagram of the steam-power generation facility 1 including the combined power generation facility and the steam supply facility 30 of the first embodiment.

Here, the configuration is the same as that of the steam supply facility 30 of the first embodiment except that a combined power generation facility including a gas turbine power generation system 120 and a steam turbine power generation system 130 is provided. Therefore, the combined power generation facility will be mainly described here.

The power generation facility 10 is a combined power generation facility that includes a gas turbine power generation system 120 and a steam turbine power generation system 130 .

The gas turbine power generation system 120 includes an air compressor 121 , a combustor 122 , a gas turbine 123 and a generator 124 .

The air compressor 121 introduces and compresses air, which is atmospheric air. The combustor 122 combusts the air and fuel compressed by the air compressor 121 . The combustor 122 is provided with a fuel supply pipe 122a for supplying fuel. As fuel for the combustor 122, so-called fossil fuels such as coal, heavy oil, and natural gas are generally used.

The gas turbine 123 is driven by combustion gas generated by the combustor 122 . The generator 124 is connected to the gas turbine 123 and generates power by driving the gas turbine 123 .

In addition, exhaust gas from the gas turbine 123 is introduced into a heat recovery steam generator (HRSG) 140 .

The steam turbine power generation system 130 includes a heat recovery steam generator (HRSG) 140 , a steam turbine 12 , a generator 13 , a condenser 14 and a feedwater pump 15 .

The waste heat recovery steam generator 140 generates steam by heat of exhaust gas from the gas turbine 123 . The generated steam is introduced into steam turbine 12 . In the steam turbine power generation system 130, the waste heat recovery boiler 140 has the functions of the boiler 11 described above.

The functions of the steam turbine 12, generator 13, condenser 14, and feedwater pump 15 are as described above.

In gas turbine power generation system 120 , air compressed by air compressor 121 is introduced into combustor 122 . Further, fuel is introduced into the combustor 122 through a fuel supply pipe 122a. In combustor 122, the fuel and air are combusted to produce combustion gases.

The combustion gases are introduced into gas turbine 123 . The gas turbine 123 is rotationally driven by the expansion work of the introduced combustion gas. A generator 124 connected to the gas turbine 123 is rotationally driven together with the gas turbine 123 to generate electricity. Exhaust gas discharged from the gas turbine 123 is introduced into the waste heat recovery boiler 140 .

In the steam turbine power generation system 130 , feedwater is pumped to the waste heat recovery boiler 140 by the feedwater pump 15 . In the waste heat recovery boiler 140, the heat of the exhaust gas discharged from the gas turbine 123 boils the feed water into steam. The flue gas that has given heat to the feed water in the waste heat recovery boiler 140 is discharged into the atmosphere.

Steam generated in the heat recovery boiler 140 is introduced into the steam turbine 12 . It should be noted that the action after this is as described above.

Thus, the steam supply facility 30 of the first embodiment can also be applied to combined power generation facilities. In addition, the effect is the same as the effect in the steam supply equipment 30 of 1st Embodiment.

Here, the steam-power generation facility 1 in which the steam supply facility 30 of the first embodiment is attached to the combined power generation facility is exemplified. As the steam supply equipment, the steam supply equipment 31, 32, 33, 34 of the above-described second to fifth embodiments may be provided.

(Seventh embodiment)
FIG. 8 is a system diagram of a steam-power generation facility 1 provided with a steam supply facility 35 of the seventh embodiment.

The steam supply facility 35 of the seventh embodiment has the same configuration as the steam supply facility 30 shown in the sixth embodiment except for the fluid introduction system to the fluid introduction pipe 41a of the evaporator 41. . Therefore, the configuration of the steam supply system will be mainly described here.

The steam-power plant 1 comprises a combined power plant with a gas turbine power system 120 and a steam turbine power system 130 .

As shown in FIG. 8 , the exhaust pipe 141 of the heat recovery boiler 140 is connected to the fluid introduction pipe 41 a of the evaporator 41 . That is, the outlet end of the exhaust pipe 141 is connected to the inlet end of the fluid introduction pipe 41a.

In the steam supply facility 35, exhaust gas discharged from the waste heat recovery boiler 140 passes through an exhaust pipe 141 and a fluid introduction pipe 41a and is introduced into the evaporator 41 as a fluid. That is, the exhaust gas that has given heat to the feed water in the waste heat recovery boiler 140 is introduced from the fluid introduction pipe 41 a as the fluid that is introduced into the evaporator 41 .

According to the steam supply facility 35 of the seventh embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

Also, in the steam supply facility 35, a fluid having a temperature higher than that for introducing seawater, river water, air, or the like can be introduced into the evaporator 41 as the fluid. Therefore, the coefficient of performance (COP) of the heat pump system 40 is improved.

Further, according to the steam supply equipment 36, the heat quantity of the exhaust gas discharged from the waste heat recovery boiler 140 can be effectively used.

(Eighth embodiment)
FIG. 9 is a system diagram of a steam-power generation facility 1 provided with a steam supply facility 36 of the eighth embodiment.

The steam supply facility 36 of the eighth embodiment has the same configuration as the steam supply facility 30 shown in the sixth embodiment except for the fluid introduction system to the fluid introduction pipe 41a of the evaporator 41. . Therefore, the fluid introduction system to the fluid introduction pipe 41a of the evaporator 41 will be mainly described here.

The steam-power plant 1 comprises a combined power plant with a gas turbine power system 120 and a steam turbine power system 130 .

As shown in FIG. 9, the fluid introduction pipe 41a of the evaporator 41 includes a heat exchanger 150. As shown in FIG. An exhaust pipe 141 of the waste heat recovery boiler 140 is connected to the heat exchanger 150 . Then, the exhaust pipe 141 introduces the exhaust gas from the waste heat recovery boiler 140 to the heat exchanger 150 . Note that the heat exchanger 150 functions as an exhaust gas heat exchanger.

The heat exchanger 150 also includes a discharge pipe 151 for discharging the exhaust gas that has given heat to the fluid flowing through the cooling medium introduction pipe 14a.

In the steam supply facility 36 , exhaust gas discharged from the waste heat recovery boiler 140 is introduced into the heat exchanger 150 through the exhaust pipe 141 . The fluid introduced into the cooling medium introduction pipe 14a exchanges heat with the exhaust gas introduced into the heat exchanger 150 and is heated. The heated fluid is introduced into evaporator 41 .

According to the steam supply facility 36 of the eighth embodiment, the same effects as those of the steam supply facility 30 of the first embodiment can be obtained.

In addition, in the steam supply equipment 36, by providing the fluid introduction pipe 41a with the heat exchanger 150 capable of exchanging heat with the exhaust gas from the waste heat recovery boiler 140, the temperature of the fluid introduced into the evaporator 41 can be raised. . Therefore, the coefficient of performance (COP) of the heat pump system 40 is improved.

Further, according to the steam supply equipment 36, the heat quantity of the exhaust gas discharged from the waste heat recovery boiler 140 can be effectively used.

Here, also in the steam supply facility 31 of the second embodiment shown in FIG. 3, the heat exchanger 150 may be provided in the fluid introduction pipe 41a. In this case, the heat exchanger 150 is provided in the fluid introduction pipe 41a positioned between the evaporator 41 and the discharge pipe 41c. Also in the steam supply facility 31, by providing the heat exchanger 150, the same effect as the steam supply facility 36 of the eighth embodiment can be obtained.

(Ninth embodiment)
FIG. 10 is a system diagram of the steam facility 2 including the boiler steam supply facility 160 and the steam supply facility 30 of the first embodiment.

Here, the configuration is the same as that of the steam supply facility 30 of the first embodiment except that the boiler steam supply facility 160 is provided. Therefore, the boiler steam supply facility 160 will be mainly described here.

The boiler steam supply facility 160 is a device that generates steam. The boiler steam supply facility 160 includes a boiler 161 and a boiler steam pipe 162 .

The boiler 161 is a steam generator that generates steam. Boiler 161 includes, for example, a combustor (not shown). The boiler 161 generates steam using combustion gas generated in the combustor as a heat source. As fuel for the boiler 161, so-called fossil fuels such as coal, heavy oil, and natural gas are generally used.

The boiler steam pipe 162 supplies the steam generated by the boiler 161 to the steam utilization section 80 .

The configuration and action of the steam supply facility 30 are as described above.

In the steam facility 2 , steam generated by the boiler 161 is supplied to the steam utilization section 80 through the boiler steam pipe 162 .

The steam generated in the heat exchanger 43 of the steam supply facility 30 is supplied to the steam utilization section 80 through the steam discharge pipe 43b. At that time, the temperature and pressure of the steam flowing through the steam discharge pipe 43b are increased by passing through the steam compressor 45 .

Here, the boiler steam pipe 162 and the steam discharge pipe 43b may be provided with the aforementioned temperature-pressure adjustment mechanism for adjusting the temperature and pressure of the steam.

Note that when the steam supplied from the boiler steam pipe 162 and the steam discharge pipe 43b to the steam utilization section 80 is adjusted to satisfy the steam temperature and pressure required by the steam utilization section 80, the temperature − A pressure adjustment mechanism becomes unnecessary.

By providing the steam supply facility 30 described above, the steam necessary for the steam utilization unit 80 can be supplied from the steam supply facility 30 together with the steam generated by the boiler steam supply facility 160 . Therefore, the flow rate of fossil fuel consumed in the boiler 161 can be reduced compared to the conventional steam facility in which the entire flow rate of steam required in the steam utilization section 80 is supplied by extraction from the boiler steam supply facility 160. can.

That is, by providing the steam supply facility 30 , the flow rate of the steam supplied from the steam supply facility 30 can be reduced in the flow rate of the steam generated by the boiler 161 of the boiler steam supply facility 160 . As a result, the flow rate of fossil fuel consumed in the boiler 161 can be reduced, and the amount of CO ₂ emissions can be reduced.

Further, in the steam supply equipment 30, in the case where the evaporator 41 uses the heat quantity of a fluid such as seawater, river water, or the atmosphere, which is natural energy, the heat quantity for evaporating the refrigerant is stably generated. can be made As a result, in the heat exchanger 43, a stable flow rate of steam to be supplied to the steam utilization section 80 can be obtained. It should be noted that the same effects can be obtained as long as the fluid can be stably supplied other than the above-described fluid made of natural energy.

Furthermore, the existing steam equipment can be easily attached with the steam supply equipment 30 . As a result, existing steam equipment can be effectively used, and a highly reliable steam supply function can be provided.

Here, the steam facility 2 in which the steam supply facility 30 of the first embodiment is attached to the boiler steam supply facility 160 is exemplified. In the fourth embodiment and fifth embodiment described above, the power generation equipment 10 may be replaced with the boiler steam supply equipment 160 .

Further, for example, exhaust gas from the boiler 161 may be introduced into the fluid introduction pipe 41a as the fluid to be introduced into the evaporator 41, similarly to the steam supply facility 35 of the seventh embodiment. Further, the heat exchanger 150 may be provided in the fluid introduction pipe 41a and the exhaust gas of the boiler 161 may be introduced into the heat exchanger 150, as in the steam supply facility 36 of the eighth embodiment.

The temperature of the fluid introduced into the evaporator 41 can be increased by introducing the exhaust gas from the boiler 161 into the evaporator 41 or by providing the heat exchanger 150 in the fluid introduction pipe 41a. Therefore, the coefficient of performance (COP) of the heat pump system 40 is improved.

Here, an example of the configuration of the temperature-pressure adjustment mechanism 170 when the boiler steam pipe 162 and the steam discharge pipe 43b are provided with the temperature-pressure adjustment mechanism 170 will be described.

FIG. 11 is a diagram schematically showing the configuration of the temperature-pressure adjusting mechanism 170 and the steam utilization section 80 provided in the steam supply facility 30 shown in FIG. Note that FIG. 11 mainly shows the configuration of the temperature-pressure adjusting mechanism 170 and the steam utilization section 80, and other configurations are omitted.

As shown in FIG. 11, the temperature-pressure adjustment mechanism 170 includes a high pressure header 171, a low pressure header 172, and an expansion section 173. As shown in FIG.

A boiler steam pipe 162 is connected to the high pressure header 171 . A steam discharge pipe 43 b is connected to the low pressure header 172 . Also, the high-pressure header 171 and the low-pressure header 172 are connected by a connecting pipe 174 .

The connecting pipe 174 is provided with an expansion portion 173 . For example, an expansion valve, an orifice, or the like is used as the expansion portion 173 . Further, the connecting pipe 174 may be provided with other adjustment mechanisms such as a desuperheater.

The high-pressure header 171 also includes a high-pressure steam supply pipe 175 that supplies steam to the high-pressure steam utilization section 80</b>C of the steam utilization section 80 . The low-pressure header 172 includes a low-pressure steam supply pipe 176 that supplies steam to the low-pressure steam utilization section 80</b>D of the steam utilization section 80 .

In the temperature-pressure adjusting mechanism 170 having such a configuration, the steam generated in the boiler 161 is supplied to the high pressure header 171 through the boiler steam pipe 162 . A part of the steam supplied to the high pressure header 171 is supplied to the high pressure steam utilization section 80C via the high pressure steam supply pipe 175 .

The rest of the steam supplied to the high pressure header 171 is introduced into the low pressure header 172 via the connecting pipe 174 . At this time, the pressure and temperature of the steam decrease as it passes through the expansion section 173 .

On the other hand, steam generated in the heat exchanger 43 is supplied to the low-pressure header 172 through the steam discharge pipe 43b. In the low-pressure header 172, steam in which the steam from the steam discharge pipe 43b and the steam from the connecting pipe 174 are mixed is supplied to the low-pressure steam utilization section 80D via the low-pressure steam supply pipe 176.

In this way, the steam generated in the boiler 161 and the heat exchanger 43 is supplied to the temperature-pressure adjustment mechanism 170 at the pressure required by each of the high-pressure steam utilization section 80C and the low-pressure steam utilization section 80D according to the application. and adjusted to temperature.

Here, in the temperature-pressure adjusting mechanism 170, the configuration including the high-pressure header 171, the low-pressure header 172, and the expanding portion 173 is not limited to this. Other headers may be provided as headers, for example medium pressure headers.

The configurations of the temperature-pressure adjusting mechanism 170 and the steam utilization section 80 described above can be applied to the first to eighth embodiments described above.

According to the embodiment described above, it is possible to reduce CO ₂ emissions and stably supply high-temperature steam.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 10... Power generation equipment 11, 161... Boiler 12... Steam turbine 13, 124... Generator 14... Condenser 14a... Coolant introduction pipe, 14b... Coolant discharge pipe, 15... Water supply pump, 20... Water supply pipes 30, 31, 32, 33, 34, 35, 36... Steam supply equipment 40... Heat pump system 41... Evaporator 41a... Fluid introduction pipe 41b... Fluid discharge pipe 41c, 151... Discharge pipe, 42...Refrigerant compressor, 42a...Drive device, 43...Heat exchanger, 43a...Water supply pipe, 43b...Steam discharge pipe, 44...Expansion part, 45...Steam compressor, 45a...Drive device, 60...Bleed pipe, 80, 80A, 80B... steam utilization section, 80C... high pressure steam utilization section, 80D... low pressure steam utilization section, 90, 110... drain pipe, 100... steam outlet pipe, 120... gas turbine power generation system, 121... air compressor, DESCRIPTION OF SYMBOLS 122... Combustor 122a... Fuel supply pipe 123... Gas turbine 130... Steam turbine power generation system 140... Waste heat recovery boiler 141... Exhaust pipe 150... Heat exchanger 160... Boiler steam supply equipment 162... Boiler steam pipes 170 Temperature-pressure adjusting mechanism 171 High-pressure header 172 Low-pressure header 173 Expansion section 174 Connecting pipe 175 High-pressure steam supply pipe 176 Low-pressure steam supply pipe.

Claims (11)

A boiler that generates steam, a steam turbine that is driven by the generated steam, a generator that generates power by driving the steam turbine, a condenser that condenses the steam discharged from the steam turbine, and pumps condensate to the boiler. A steam supply facility attached to a power generation facility equipped with a feed water pump that
a heat pump system in which the refrigerant circulates, comprising an evaporator for evaporating the refrigerant, a refrigerant compressor for compressing the evaporated refrigerant, a heat exchanger for dissipating the heat of the compressed refrigerant, and an expansion section for expanding the dissipated refrigerant;
a water supply pipe for introducing water into the heat exchanger;
a steam discharge pipe for discharging, from the heat exchanger, steam generated by applying the amount of heat radiated by the refrigerant to the water introduced from the water supply pipe;
a fluid introduction pipe that introduces into the evaporator a fluid that gives heat to the refrigerant in the evaporator;
a fluid discharge pipe for discharging the fluid from the evaporator;
an extraction pipe for extracting steam from the steam turbine;
A steam supply facility, characterized in that the steam introduced into the steam discharge pipe and the extraction pipe is supplied to a steam utilization section. The fluid introduced into the fluid introduction pipe is a cooling medium that cools steam discharged from the steam turbine in the condenser and discharged from the discharge pipe of the condenser. Item 1. Steam supply equipment according to item 1. 3. The steam supply facility according to claim 1, wherein the drain collected from the steam utilization section is introduced into the fluid introduction pipe. The fluid introduced into the fluid introduction pipe is a discharge cooling medium that cools the steam discharged from the steam turbine in the condenser and discharged from the discharge pipe of the condenser,
2. The steam supply facility according to claim 1, wherein the introduced cooling medium introduced into the condenser includes the discharged cooling medium discharged from the fluid discharge pipe. the fluid introduced into the fluid introduction pipe is part of steam extracted from the steam turbine or steam discharged from the steam turbine;
2. The steam supply facility according to claim 1, wherein an outlet of said fluid discharge pipe is connected to a pipe between said condenser and said water supply pump. 3. The steam supply facility according to claim 1, wherein the drain collected from the steam utilization section is introduced into the water supply pipe. the steam utilization unit comprises a first steam utilization unit and a second steam utilization unit,
The first steam utilization section is supplied with steam from the extraction pipe,
3. The steam supply facility according to claim 1, wherein steam is supplied from said steam discharge pipe to said second steam utilization section. The power generation system includes an air compressor that compresses air, a combustor that burns the compressed air and fuel, and a gas turbine driven by combustion gas generated by the combustor,
8. The steam supply facility according to any one of claims 1 to 7, wherein the boiler is configured by a waste heat recovery boiler that generates steam by heat quantity of exhaust gas from the gas turbine. The power generation system includes an air compressor that compresses air, a combustor that burns the compressed air and fuel, and a gas turbine driven by combustion gas generated by the combustor,
The boiler comprises a waste heat recovery boiler that generates steam from the heat quantity of exhaust gas from the gas turbine,
The fluid introduction pipe is provided with an exhaust gas heat exchanger that exchanges heat with the exhaust gas discharged from the waste heat recovery boiler,
The exhaust gas discharged from the heat recovery steam generator is introduced into the exhaust gas heat exchanger to heat the fluid flowing through the fluid introduction pipe. Steam supply equipment. The power generation system includes an air compressor that compresses air, a combustor that burns the compressed air and fuel, and a gas turbine driven by combustion gas generated by the combustor,
The boiler comprises a waste heat recovery boiler that generates steam from the heat quantity of exhaust gas from the gas turbine,
2. The steam supply system according to claim 1, wherein said fluid introduced into said fluid introduction pipe is exhaust gas discharged from said waste heat recovery boiler. A steam supply facility attached to a steam facility equipped with a boiler for generating steam,
a heat pump system in which the refrigerant circulates, comprising an evaporator for evaporating the refrigerant, a refrigerant compressor for compressing the evaporated refrigerant, a heat exchanger for dissipating the heat of the compressed refrigerant, and an expansion section for expanding the dissipated refrigerant;
a water supply pipe for introducing water into the heat exchanger;
a steam discharge pipe for discharging, from the heat exchanger, steam generated by applying the amount of heat radiated by the refrigerant to the water introduced from the water supply pipe;
a fluid introduction pipe that introduces into the evaporator a fluid that gives heat to the refrigerant in the evaporator;
a fluid discharge pipe for discharging the fluid from the evaporator;
and a boiler steam pipe for leading steam from the boiler,
A steam supply facility, wherein the steam introduced into the boiler steam pipe and the steam discharge pipe is supplied to a steam utilization section.

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