WO2011033559A1

WO2011033559A1 - Cogeneration power plant and biomass reforming combined cycle plant

Info

Publication number: WO2011033559A1
Application number: PCT/JP2009/004640
Authority: WO
Inventors: 高橋文夫; 難波孝次; 幡宮重雄; 柴田貴範
Original assignee: 株式会社日立製作所
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2011-03-24
Also published as: JP5331890B2; JPWO2011033559A1

Abstract

Provided is a cogeneration power plant wherein the amount of waste heat due to heated effluent discharged to the external environment can be reduced. The cogeneration power plant is equipped with a boiling water nuclear power plant and a hot water generator. Steam generated from a reactor is supplied to a high pressure turbine and a low pressure turbine, and power is generated by rotating a generator. The hot water generator has a hot water pipe connected to the cooling water discharge pipe of a condenser which condenses exhaust steam of the low pressure turbine, and a plurality of heaters and steam heat pumps are installed in the hot water pipe. Vapor extraction from the low pressure turbine is supplied to the plurality of heaters and heats the cooling water introduced by the hot water pipe. Vapor extraction from the high pressure turbine is supplied to other heaters provided in the hot water pipe, and the hot water is further heated by the heaters to produce subcritical water. Vapor extraction from the high pressure turbine is compressed by the steam heat pumps and the hot water is further heated by the compressed steam.

Description

Cogeneration plant and biomass reforming combined power plant

The present invention relates to a cogeneration power plant and a cogeneration biomass reforming combined plant, and more particularly, to a cogeneration power plant and a biomass reforming combined power plant suitable for using a thermal power plant and a nuclear power plant.

External heat engines such as thermal power plants and nuclear power plants are based on Rankine cycle. The Rankine cycle is a cycle in which condensable vapor is used as a working medium, and consists of the following four processes. (1) Heat feed water to generate hot water. (2) The hot water is further heated to generate steam. (3) The steam is sent to the turbine and expanded to obtain power. (4) Condensate steam to supply water. In a normal power plant, these four processes are assigned to each device as follows. In the power plant, (1) and (2) are responsible for boilers and steam generators such as nuclear reactors for boiling water nuclear power plants, (3) for steam turbines, and (4) for condensers. The working medium is circulated constantly.

A regeneration process is usually used as a method for improving the efficiency of the Rankine cycle. In the regeneration process, heating of the feed water in the process (1) is performed using steam extracted from the turbine, and heat is recovered by extraction from the turbine. Although the turbine output decreases with the bleed air, the recovered heat is effectively used for heating the feed water, so that the thermal efficiency is improved. Moreover, in order to suppress the wetness in a turbine, the reheating process which reheats a steam in the middle of expansion | swelling of the steam in process (3) is normally used. As an additional effect, thermal efficiency and power are increased.

For external combustion engines that use condensable steam as the working medium, a steam engine that realizes a more efficient Carnot cycle is Iwanami Lecture, Basic Engineering 8, Thermodynamics III, pp. 231 to 252 (Ono Shu, Iwanami Shoten) (Issued Jan. 7, 1971)) (in particular, see pages 234 to 236, see FIG. 6.3). In this steam engine, instead of the Rankine cycle process (1), hot water is generated by compressing feed water generated by condensation of steam and uncondensed steam together. This process is called a compression liquefaction process.

Among the conventional technologies described above, in the regeneration process, the maximum thermal efficiency can be theoretically obtained by making the steam extraction points of the turbine from a continuous number of steam extraction points. However, in practice, the steam extraction point must be finite, and there remains room for improving the thermal efficiency in the regeneration process.

Japanese Patent Application Laid-Open No. 2008-2413 describes an example of a steam heat pump system in FIG. This steam heat pump includes an evaporator, a plurality of compressors, and a plurality of cooling towers. The plurality of compressors are connected in series with each other by connecting a steam inlet of a compressor located downstream to a steam outlet of the compressor located upstream. Each cooling tower is disposed between the compressors. The steam generated in the evaporator is compressed by the most upstream compressor, the temperature rises, and is cooled by the cooling tower. The steam cooled in the cooling tower is compressed by another compressor located downstream, the temperature rises, and is supplied to the other cooling tower to be cooled. Thus, in the steam heat pump, the compression of the steam by the compressor and the cooling of the compressed steam by the cooling tower are repeated.

Japanese Patent Application Laid-Open No. 5-65808 describes a co-heated steam turbine plant. This co-heat steam turbine plant supplies steam generated in a boiler to a turbine, rotates a generator to generate electric power, and uses steam exhausted from the turbine as a high-pressure process steam supply destination and a low-pressure process steam supply destination. Supply each. The steam supplied to the high pressure process steam supply destination compresses the steam exhausted from the turbine with a compressor.

In Japanese Utility Model Laid-Open No. 1-123001, steam supplied from a condenser is compressed by a single-stage compressor, and the compressed steam is supplied to a four-stage water heater from a plurality of locations in the axial direction of the compressor. A thermal power plant is described.

In recent years, the use of high-temperature and high-pressure subcritical water or supercritical water has attracted attention for reforming biomass and waste. In particular, subcritical water has the highest ionic product per unit volume and is said to be suitable for reforming biomass and waste.

Japanese Patent Application Laid-Open No. 2008-296192 describes a circulation type continuous subcritical water reaction treatment apparatus. In this circulation type continuous subcritical water reaction treatment apparatus, slurry liquid containing liquid, solid and gel raw materials in a raw material tank is supplied from a supply tank having a stirrer to a heater part of a subcritical water reactor. Supply. This slurry liquid is heated by the heating medium supplied from the boiler by the heater member to be in a subcritical water state. This slurry liquid is led to the gas-liquid separator part of the subcritical water reactor.

U.S. Pat. No. 7,476,296 describes an apparatus for converting organic and waste materials into useful products. This equipment can be used to remove various wastes such as organs, livestock manure, municipal sewage sludge, tires and plastics, gas, oil, specialty chemicals and carbon with acceptable cost and high energy efficiency without generating odors. Produces useful materials including solids. The apparatus includes a heater that produces a mixture of liquid and vaporized oil from an organic liquid, a reactor that converts the mixture to a carbon solid and a hydrocarbon / gas mixture, a first cooler that receives the carbon solid, and a hydrocarbon / gas. A second cooler is provided for receiving the mixture.

JP 59-12605A proposes a cogeneration system using a nuclear reactor. In this combined heat and power generation system, high-temperature cooling water generated in a nuclear reactor is guided to a steam generator to generate steam, and this steam is guided to a high-pressure turbine and a low-pressure turbine to generate power. The steam exhausted from the low-pressure turbine is condensed into water by the condenser. This water is supplied to the steam generator through a water supply pipe, but is heated by a five-stage water heater in the middle. In these feed water heaters, steam extracted from the high-pressure turbine or the low-pressure turbine is supplied to each feed water heater as a heating source. A closed loop connecting the two-stage low-pressure feed water heater and other heat exchangers to which the extraction steam from the low-pressure turbine is supplied is formed, and other heat supplied to the heat exchanger by a heat medium circulating in the closed loop. The medium is heated.

In addition, in the waste treatment and resource / energy conversion by subcritical water reaction (Hiroyuki Yoshida, CMC Publishing (2007)), the temperature range of subcritical water is 120 ° C to 370 ° C (5 pages, Fig. 4). The ion product per volume becomes maximum at around 250 ° C. (page 4, FIG. 3), and is described as being suitable for the reforming reaction.

JP 2008-2413 A Japanese Patent Laid-Open No. 5-65808 Japanese Utility Model Publication No. 1-130001 JP 2008-296192 A US Pat. No. 7,476,296 JP 59-126055

The theoretical maximum thermal efficiency may be obtained in the compression liquefaction process. However, it is a gas in the steam engine that realizes the Carnot cycle described in Thermodynamics III, pages 234 to 236 and Fig. 6.3 (Take Ono, Iwanami Shoten, published on January 7, 1971). Compressed in a mixed state of steam and liquid feed water. When compression is performed in such a state where the gas and the liquid are mixed, the density ratio of the gas and the liquid is large, the uniformity of the density is not maintained, and the compression efficiency is lowered. In the steam engine described in FIG. 6.3, it is necessary to compress the mixed steam and feed water at a high pressure ratio in order to obtain hot water only by the compression liquefaction process. For this reason, a cylinder type compressor is used in the steam engine. This compresses only one of the reciprocating motions of the piston in the cylinder, so that a steady operation is impossible due to pulsation. In addition, it is difficult to increase the capacity of the cylinder type, and it is difficult to apply to a commercial power plant in terms of capacity.

Japanese Patent Application Laid-Open No. 2008-2413 and Japanese Utility Model Laid-Open No. 1-112301 do not refer to a cogeneration plant. The co-heated steam turbine plant described in Japanese Patent Laid-Open No. 5-65808 supplies steam exhausted from the turbine to a high-pressure process steam supply destination and a low-pressure process steam supply destination, respectively. However, Japanese Patent Laid-Open No. 5-65808 does not mention supply of hot water.

If hot water generated during regeneration in a cogeneration plant and hot water generated during compression liquefaction, i.e. subcritical water, can be used for biomass reforming, waste heat from the cogeneration plant , And hot water with high power and utility value can be supplied.

Japanese Patent Application Laid-Open No. 2008-296192 and US Pat. No. 7,476,296 describe a reforming process using subcritical water produced by a boiler, but do not mention a cogeneration plant. In the combined heat and power generation system using a nuclear reactor described in Japanese Patent Laid-Open No. 59-125005, heat circulating in a closed loop formed by connecting a two-stage low-pressure feed water heater and other heat exchangers is used. The other heat medium supplied to the heat exchanger is heated by the medium. In such a system configuration, the heating efficiency of the other heat medium is poor, and the temperature of the other heat medium cannot be increased.

An object of the present invention is to provide a cogeneration plant that can reduce the amount of waste heat discharged from the condenser to the external environment and supply hot water.

A feature of the present invention that achieves the above-described object is that a steam generator that converts water into steam, a turbine that is supplied with steam from the steam generator, a condenser that condenses steam exhausted from the turbine, and hot water A generator,
The hot water generator is connected to the first piping connected to the second piping, the first piping for guiding the water extracted from the turbine, and the water guided by the first piping. And having a plurality of heating devices for heating with steam supplied by the second pipe.

Water is heated by the steam extracted from the turbine and supplied to each heating device provided in the first pipe, and hot water that is subcritical water is generated. Since the steam supplied from each heating device provided in the first pipe is extracted from the turbine, the amount of steam exhausted to the condenser is reduced, and cooling water (exhaust from the condenser to the external environment ( The amount of waste heat due to warm wastewater is reduced.

Preferably, the hot water generator condenses the steam in the condenser and guides the cooling water discharged from the condenser, and the first pipe that is provided in the first pipe and guides the steam extracted from the turbine. There are two pipes and a plurality of heating devices that are connected to the second pipe and are provided in the first pipe and that heat the cooling water guided by the first pipe with steam supplied through the second pipe. Since the cooling water discharged from the condenser is hot water, the amount of waste heat due to the cooling water discharged to the external environment is further reduced.

According to the present invention, it is possible to reduce the amount of waste heat due to warm wastewater discharged to the external environment.

It is a block diagram of the cogeneration plant of Example 1 which is one suitable Example of this invention. It is a detailed block diagram of the vapor | steam heat pump apparatus shown in FIG. It is a TS diagram regarding a simple Rankine cycle. It is a Tq · S diagram for a simple Rankine cycle. It is a TS diagram regarding a regenerated Rankine cycle. It is a Tq * S diagram regarding a regenerated Rankine cycle. It is a TS diagram regarding a hot-water combined supply cycle. It is a Tq * S diagram regarding a hot-water combined supply cycle. It is a block diagram of the cogeneration plant of Example 2 which is another Example of this invention. It is a block diagram of the cogeneration plant of Example 3 which is another Example of this invention. It is a block diagram of the biomass reforming combined power plant of Example 4 which is another Example of this invention. It is a detailed block diagram of the biomass reforming apparatus shown in FIG. It is a block diagram of the cogeneration plant of Example 5 which is another Example of this invention. It is a block diagram of the cogeneration plant of Example 6 which is another Example of this invention.

The inventors examined a combined heat and power generation plant that can reduce the amount of waste heat from the discharged hot effluent and raise the temperature of the resulting hot water accordingly.

The inventors first considered expanding each theory of the simple Rankine cycle and the regenerated Rankine cycle to a combined hot water supply capable of explicitly handling the cooling water temperature. A TS diagram for a simple Rankine cycle is shown in FIG. 3, and a Tq · S diagram for a simple Rankine cycle is shown in FIG. A TS diagram for the regenerated Rankine cycle is shown in FIG. 5, and a Tq · S diagram for the regenerated Rankine cycle is shown in FIG. Further, FIG. 7 shows a TS diagram regarding the hot water combined cycle, and FIG. 8 shows a Tq · S diagram regarding the hot water combined cycle. 4 and 6, the origins of the entropy of the cooling water and the entropy of the steam on the horizontal axis are different. In FIG. 8, the origin of the entropy of cooling water and the entropy of steam on the horizontal axis is the same.

The TS diagram represents the change in the entropy of the vapor of temperature T and unit mass, that is, the specific entropy. The Tq · S diagram shows a Tq · S diagram using entropy q · S multiplied by specific flow q instead of specific entropy S. Here, the specific flow rate q was standardized assuming that the amount of steam generated in the boiler is 1. In FIGS. 6 and 8, the reduction in the flow rate of the turbine stage due to the bleed air is taken into consideration, and the power generation output when the amount of steam generated in the boiler (steam generating device) is 1 as the ABCD area is shown. In FIG. 6 and FIG. 8, the specific flow rate of the cooling water is normalized by assuming the amount of steam generated in the boiler to be 1.

First, a simple Rankine cycle will be described with reference to FIGS. If the state of the cooling water in the condenser is added to the TS diagram (FIG. 3), the cooling water inflow becomes point Xc and the cooling water outflow becomes point Xh. FIG. 3 is a formal representation and has no physical meaning as it is. On the other hand, in the Tq · S diagram (FIG. 4), the specific flow rate of the cooling water is normalized assuming that the amount of steam generated in the boiler is 1. The route XcXh substantially matches the route DA. This is because the amount of heat Qda exhausted to the condenser due to steam discharged from the turbine is the product of the change width of entropy q · S and the temperature, but the cooling water temperature is approximately equal to the condensing temperature and is a heat receiver. This is because the change width of the entropy q · S of the cooling water supplied to the condenser matches the exhaust heat side.

In the regenerated Rankine cycle, steam is extracted from the middle of the adiabatic expansion of steam in the path CD shown in FIG. 5, and the feed water is heated by the extracted steam in the path AB. The vapor side of (FIG. 6) approaches a parallelogram. The electrical output is proportional to the area of the path ABCD. When the specific flow rate is the same, the regenerated Rankine cycle has a reduced output but improved thermal efficiency compared to a simple Rankine cycle. The regeneration Rankine cycle path DA is shorter than a simple Rankine cycle. Thereby, in the regeneration Rankine cycle, the amount of heat exhausted to the condenser is reduced.

In the regeneration Rankine cycle, the amount of heat exhausted to the condenser could be further reduced by increasing the amount of steam extracted from the path CD, compared to the simple Rankine cycle. If the amount of steam extracted in the path CD is further increased, the amount of heat exhausted by the steam exhausted from the turbine to the condenser can be further reduced.

In the example of the combined hot water supply cycle shown in FIGS. 7 and 8, hot water is produced separately from the feed water supplied to the steam generator, and the hot water is supplied to the outside. The heating of this hot water is similar to the heating of the feed water. In addition, steam extracted from the middle of the adiabatic expansion of steam is used. In this example, all the exhaust heat to the condenser is recovered, and hot water having the same temperature as the steam generator is obtained. In this hot water co-feed cycle, as shown in the TS diagram (FIG. 7), both the hot water and the feed water are in the liquid phase, and the specific entropies coincide if the temperature T is equal. For this reason, in the hot water combined supply cycle, the amount of cooling water supplied to the condenser is reduced compared to the regeneration Rankine cycle so that it is almost equal to the amount of water supplied. Cooling water (for example, seawater) supplied to the condenser by the amount of heat exhausted from the turbine by steam exhausted from the turbine is heated to the temperature T0 and then heated by the extracted steam in the same manner as the water supply. The

This process is shown in the Tq · S diagram (Fig. 8). Due to steam extraction in the middle of the path CD, the amount of heat exhausted from the turbine to the condenser becomes small, and the point D substantially coincides with the point A. That is, a substantially triangular area surrounded by the path ABCDA is an electrical output to be obtained. The area of this ABCD is about 1/2 of the regenerated Rankine cycle, and the electric output is also 1/2. However, the combined hot water supply cycle shown in FIGS. 7 and 8 can supply hot water generated from the cooling water supplied to the condenser. This is done by heating the cooling water of the condenser with the extracted steam from the middle of the adiabatic expansion of the steam to generate hot water, and supplying the generated hot water to the outside. That is, while hot water is heated to a temperature lower than the steam temperature of the steam generator, the steam generated by the steam generator is used as a high-temperature heat source, and cooling water supplied to the condenser is used as a low-temperature heat source to generate power. The steam is used as a high temperature heat source, and the cooling water that condenses the steam extracted from the middle of the adiabatic expansion is used as a low temperature heat source for power generation. In the combined hot water cycle, the cooling water that condenses the steam extracted from the middle of the adiabatic expansion contributes to the power generation in the power plant and becomes hot water. It is theoretically the same if a compression liquefaction process is used instead of the regeneration process.

Furthermore, the hot water obtained by the above hot water combined supply cycle is subcritical water (120 ° C. to 370 ° C.) and can be used for reforming biomass and the like. This reforming method applies a semi-batch suitable for cogeneration and recovers all products in the solid, dissolved, fat or gas state. The reforming reaction is generally an endothermic reaction, and the recovered exhaust heat is stored in the reformed product.

Embodiments of the present invention reflecting the above-described examination results will be described below.

A cogeneration plant according to Embodiment 1 which is a preferred embodiment of the present invention will be described with reference to FIGS. The cogeneration plant 1 of this embodiment includes a boiling water nuclear power plant 2 and a hot water generator 21.

The boiling water nuclear power plant 2 includes a nuclear reactor 3 that is a steam generator, a high-pressure turbine (first turbine) 4, a low-pressure turbine (second turbine) 5 having a lower pressure than the high-pressure turbine 4, a condenser 8, and low-pressure

feed water Heaters

9 and 10, a high-pressure feed water heater 11, and a feed water pump 13 are provided. The nuclear reactor 3 is connected to a high pressure turbine 4 and a low pressure turbine 5 by a main steam pipe 7. A reheater 6 is provided in the main steam pipe 7 between the high pressure turbine 4 and the low pressure turbine 5. A pipe 20 connected to the nuclear reactor 3 is connected to the reheater 6. A water supply pipe 12 connects the condenser 8 and the reactor 3. The feed water pipe 12 is provided with low pressure

feed water heaters

9 and 10, a feed water pump 13 and a high pressure feed water heater 11 in this order from upstream to downstream. The extraction pipe 17 is connected to a turbine casing (not shown) of the low-pressure turbine 5 and further connected to the low-pressure feed water heater 9. The extraction pipe 18 is connected to the turbine casing of the low pressure turbine 5 and the low pressure feed water heater 10. The extraction pipe 17 is connected to the turbine casing on the rear stage side of the low-pressure turbine 5 with respect to the extraction pipe 18. The extraction pipe 19 is connected to a turbine casing (not shown) of the high-pressure turbine 4 and the high-pressure feed water heater 11. The condenser 8 is provided with a large number of heat transfer tubes 14. A cooling water supply pipe 15 and a cooling water discharge pipe 16 are connected to each heat transfer pipe 14.

The hot water generator 21 includes a pump 23, heaters (heating devices) 24, 25, and 26 that are heat exchangers, and a steam heat pump device (heating device) 36. The pump 23, the

heaters

24, 25, and 26 that are heat exchangers, and the steam heat pump device 36 are provided in the hot water pipe (first pipe) 22 in this order from the upstream. The heater 24 is connected to the extraction pipe 17 by an extraction pipe (second pipe) 27 and communicates with the low-pressure turbine 5. The heater 25 is connected to the extraction pipe 18 by an extraction pipe (second pipe) 28 and communicates with the low-pressure turbine 5. The heater 26 is connected to the extraction pipe 19 by an extraction pipe (second pipe) 29 and communicates with the high-pressure turbine 4. The condensed water pipe 30 connected to the heater 24 is connected to the feed water pipe 10 between the low pressure feed water heater 9 and the low pressure feed water heater 10. A condensed water pipe 31 connected to the low-pressure feed water heater 9 is connected to the condensed water pipe 30. A condensed water pipe 32 connected to the heater 25 is connected between the low-pressure feed water heater 10 and the feed water pump 13 to the feed water pipe 10. A condensed water pipe 33 connected to the low-pressure feed water heater 10 is connected to the condensed water pipe 32. The condensed water pipe 34 connected to the heater 26 is connected to the water supply pipe 10 downstream of the high-pressure feed water heater 11. A condensed water pipe 35 connected to the high-pressure feed water heater 11 is connected to the condensed water pipe 34.

As shown in FIG. 2, the steam heat pump device 36 includes

compressors

37A, 37B, 37C and 37D, a motor (drive device) 38,

condensers

41A, 41B, 41C and 41D and

moisture separators

43A, 43B and 43C. Have. The

compressors

37A, 37B, 37C, and 37D are turbo compressors that are rotating compressors having rotating blades. Rotors (not shown) having moving blades of the

compressors

37A, 37B, 37C and 37D are connected to the rotating shaft 40. The rotating shaft 40 is connected to the motor 38 via a gear 39.

The condenser 41A is connected to the first stage compressor 37A by an exhaust pipe 44A. The condenser 41A is connected to the second stage compressor 37B by a supply pipe 45A provided with a moisture separator 43A. The condenser 41B is connected to the compressor 37B by an exhaust pipe 44B. The condenser 41B is connected to the third stage compressor 37C by a supply pipe 45B. A moisture separator 43B is provided in the supply pipe 45B. The condenser 41C is connected to the compressor 37C by an exhaust pipe 44C. The condenser 41C is connected to a fourth-stage compressor 37D as the final stage by a supply pipe 45C. A moisture separator 43C is provided in the supply pipe 45C. The condenser 41D is connected to the compressor 37D by an exhaust pipe 44D. In the steam heat pump device 36, a compressor and a condenser are provided in pairs. The first-stage compressor 37 A located at the most upstream is connected to the turbine casing of the high-pressure turbine 4 by an extraction pipe (second pipe) 48 provided with an on-off valve 54.

A heat transfer tube 42A is provided in the condenser 41A, and a heat transfer tube 42B is provided in the condenser 41B. A heat transfer tube 42C is provided in the condenser 41C, and a heat transfer tube 42D is provided in the condenser 41D. The hot water pipe 22 is connected to the inlet of the heat transfer pipe 42 A downstream of the pump 55 provided in the hot water pipe 22. A pump 55 is disposed downstream of the heater 26. The hot water tube 22 connects the outlet of the heat transfer tube 42A and the inlet of the heat transfer tube 42B, the outlet of the heat transfer tube 42B and the inlet of the heat transfer tube 42C, and the outlet of the heat transfer tube 42C and the heat transfer tube 42D, respectively. The outlet of the heat transfer tube 42 D is also connected to the hot water tube 22. The condensers 41 A, 43 B, 43 C, and 43 D are condensers if attention is paid to the steam exhausted from the compressors, but are heaters if attention is paid to the liquid flowing in the hot water pipe 22.

The condensed water piping 47A provided with the pump 46A is connected to the bottom of the condenser 41A and the condenser 41B. A condensed water pipe 47B provided with a pump 46B is connected to the bottom of the condenser 41B and the condenser 41C. A condensed water pipe 47C provided with a pump 46C is connected to the bottom of the condenser 41C and the condenser 41D. A condensed water pipe 47D provided with a pump 46D is connected to the bottom of the condenser 41D. The condensed water pipe 47 D is connected to the water supply pipe 12 downstream from the connection point between the condensed water pipe 34 and the water supply pipe 12.

Steam generated in the nuclear reactor 3 is supplied to the high-pressure turbine 4 through the main steam pipe 7 and further guided to the reheater 6 and the low-pressure turbine 5. The steam discharged from the high-pressure turbine 4 is heated by the steam generated in the nuclear reactor 3 supplied through the pipe 20 in the reheater 6. Steam whose temperature has risen in the reheater 6 is supplied to the low-pressure turbine 5. The steam supplied to the high-pressure turbine 4 and the low-pressure turbine 5 rotates the high-pressure turbine 4 and the low-pressure turbine 5 whose rotation shafts are connected to each other. A generator (not shown) connected to the rotating shafts of these turbines rotates to generate power.

The steam exhausted from the low-pressure turbine 5 is condensed by the condenser 8 to become water. The condensation of steam in the condenser 8 is performed by supplying cooling water (for example, seawater) to the heat transfer pipe 14 in the condenser 8 through the cooling water supply pipe 15. The cooling water in the heat transfer pipe 14 whose temperature has been increased by condensing the steam is discharged to the sea through the cooling water discharge pipe 16.

Water generated by condensation of steam in the condenser 8 is supplied to the reactor 3 through the water supply pipe 12 as water supply. The feed water discharged from the condenser 8 is guided to the low pressure feed water heater 9. The steam extracted from the low-pressure turbine 4 is supplied to the low-pressure feed water heater 9 through the extraction pipe 17 to heat the feed water supplied to the low-pressure feed water heater 9. The feed water discharged from the low-pressure feed water heater 9 is supplied to the low-pressure feed water heater 10. This feed water is further heated by the steam extracted from the low pressure turbine 4 and supplied to the low pressure feed water heater 10 through the extraction pipe 18. The feed water heated by the low pressure feed water heater 10 is guided to the high pressure feed water heater 11. The feed water is extracted from the high-pressure turbine 4, heated by steam supplied to the high-pressure feed water heater 11 through the extraction pipe 19, and supplied to the nuclear reactor 3.

The steam supplied to the low-pressure feed water heater 9 is condensed by heating the feed water and becomes condensed water. The condensed water is guided to the water supply pipe 12 through the

condensed water pipes

31 and 30. The steam supplied to the low-pressure feed water heater 10 is condensed by heating the feed water to become condensed water. The condensed water is guided to the water supply pipe 12 through the

condensed water pipes

33 and 32. The steam supplied to the high-pressure feed water heater 11 is condensed by heating the feed water to become condensed water. The condensed water is guided to the water supply pipe 12 through the

condensed water pipes

35 and 34.

The

pumps

23 and 55 are driven, and a part of the cooling water discharged from the condenser 8 to the cooling water discharge pipe 16 flows into the hot water pipe 22 and is led to the heater 24. A part of the steam flowing in the extraction pipe 17 is supplied to the heater 24 by the extraction pipe 27 and heats the cooling water in the heater 24. The heated cooling water is supplied to the heater 25. A part of the steam flowing in the extraction pipe 18 is supplied to the heater 25 through the extraction pipe 28 and heats the cooling water in the heater 25. The heated cooling water is further supplied to the heater 26. A part of the steam flowing in the extraction pipe 19 is supplied to the heater 26 by the extraction pipe 29 and heats the cooling water in the heater 26. Since the temperature of each steam flowing in the

extraction pipes

17, 18 and 19 increases in the order of the extraction pipe 17, the extraction pipe 18 and the extraction pipe 19, the cooling water flowing into the hot water pipe 22 is heated by the

heaters

24, 25 and 26. The temperature gradually rises due to heating by, and becomes hot water which is subcritical water.

Heaters

24, 25 and 26 are provided with heat transfer tubes inside. Cooling water guided by the hot water pipe 22 flows through the heat transfer pipe, and steam extracted from the corresponding turbine is supplied to the shell side of each heater. The heat of the steam is transmitted to the cooling water flowing through the heat transfer tube through the heat transfer tube, and the cooling water is heated. The

heaters

24, 25, 26 and the steam heat pump device 36 are both heating devices, but the

heaters

24, 25, 26 and the steam heat pump device 36 have different structures.

The hot water discharged from the heater 26 is supplied to the steam heat pump device 36, and the temperature is further increased. The heating of hot water by the steam heat pump device 36 will be described in detail.

In each of the

compressors

37A, 37B, 37C, and 37D, a rotor having moving blades is rotated by driving a motor 38. The steam extracted from the high-pressure turbine 4 is supplied to the first stage compressor 37 A through the extraction pipe 48. At this time, the on-off valve 54 is open. The steam is compressed by the compressor 37A and the temperature rises. The compressed steam is led into the condenser 41A through the exhaust pipe 44A and cooled by hot water flowing through the heat transfer pipe 42A of the condenser 41A. By this cooling, a part of the vapor in the condenser 41A is condensed to become condensed water 53 and falls to the bottom of the condenser 41A. Since the steam supplied to the condenser 41A is higher than the temperature of the hot water flowing in the heat transfer tube 42A, it is condensed on the outer surface of the heat transfer tube 42A.

The hot water supplied by the hot water pipe 22 and flowing in the heat transfer pipe 42A is heated by cooling the steam in the condenser 41A and further condensing a part of the steam, and the temperature rises. The temperature of the steam in the condenser 41A and the temperature of the hot water in the heat transfer tube 42A are substantially equal, and a thermal equilibrium is approximately maintained between the steam and the hot water.

The uncondensed vapor in the condenser 41A is guided to the compressor 37B through the supply pipe 45A after the moisture is removed by the moisture separator 43A. The volume flow rate of the steam supplied from the condenser 41A to the compressor 37B is reduced by the cooling of the steam by the condenser 41A. The steam is compressed again by the compressor 37B, and the temperature rises. The temperature of the steam exhausted from the compressor 37B is higher than the temperature of the steam exhausted from the compressor 37A. The steam compressed by the compressor 37B is led into the condenser 41B through the exhaust pipe 44B and cooled by hot water flowing through the heat transfer pipe 42B of the condenser 41B. By this cooling, a part of the vapor in the condenser 41B is condensed to become condensed water 53 and falls to the bottom of the condenser 41B. Since the steam supplied to the condenser 41B is higher than the temperature of the hot water flowing in the heat transfer tube 42B, it is condensed on the outer surface of the heat transfer tube 42B.

The hot water discharged from the heat transfer tube 42A and flowing in the heat transfer tube 42B is heated by cooling the steam in the condenser 41B and further condensing a part of the steam, and the temperature further rises. The temperature of the steam in the condenser 41B and the temperature of the hot water in the heat transfer tube 42B are substantially equal, and the thermal equilibrium is approximately maintained.

The uncondensed vapor in the condenser 41B is guided to the compressor 37C through the supply pipe 45B after moisture is removed by the moisture separator 43B. The volume flow rate of the steam supplied from the condenser 41B to the compressor 37C is reduced by the cooling of the steam by the condenser 41B. The steam is compressed again by the compressor 37C and the temperature rises. The temperature of the steam exhausted from the compressor 37C is higher than the temperature of the steam exhausted from the compressor 37B. The steam compressed by the compressor 37C is led into the condenser 41C through the exhaust pipe 44C and cooled by hot water flowing through the heat transfer pipe 42C of the condenser 41C. By this cooling, a part of the vapor in the condenser 41C is condensed to become condensed water 53 and falls to the bottom of the condenser 41C. Since the steam supplied to the condenser 41C is higher than the temperature of the hot water flowing in the heat transfer tube 42C, it is condensed on the outer surface of the heat transfer tube 42C.

The hot water discharged from the heat transfer tube 42B and flowing in the heat transfer tube 42C is heated by cooling the steam in the condenser 41C and further condensing a part of the steam, and the temperature further rises. The temperature of the steam in the condenser 41C and the temperature of the hot water in the heat transfer tube 42C are approximately equal, and the thermal equilibrium is approximately maintained.

The uncondensed vapor in the condenser 41C is guided to the compressor 37D through the supply pipe 45C after moisture is removed by the moisture separator 43C. The volume flow rate of the steam supplied from the condenser 41C to the compressor 37D is reduced by the cooling of the steam by the condenser 41C. The steam is compressed again by the compressor 37D, and the temperature rises. The temperature of the steam exhausted from the compressor 37D is higher than the temperature of the steam exhausted from the compressor 37C. The steam compressed by the compressor 37D is led into the condenser 41D through the exhaust pipe 44D and cooled by hot water flowing through the heat transfer pipe 42D of the condenser 41D. By this cooling, the vapor in the condenser 41D is condensed to become condensed water 53 and falls to the bottom of the condenser 41D. Since the steam supplied to the condenser 41D is higher than the temperature of the hot water flowing in the heat transfer tube 42D, it is condensed on the outer surface of the heat transfer tube 42D. All the steam supplied into the condenser 41D is condensed in the condenser 41D.

The hot water discharged from the heat transfer tube 42C and flowing in the heat transfer tube 42D is heated by condensing the vapor in the condenser 41D, and the temperature further rises. The temperature of the steam in the condenser 41D and the temperature of the hot water in the heat transfer tube 42D are substantially equal, and the thermal equilibrium is approximately maintained. The hot water (subcritical water) discharged from the heat transfer pipe 42D requires the hot water through the hot water pipe 22 (for example, a biomass reformer or hydrothermal heat of inorganic materials such as nanotubes and zeolite) Synthesizer).

Pumps

46A, 46B, 46C and 46D are driven. The condensed water 53 collected at the bottom of the condenser 41A is boosted by the pump 46A and guided into the condenser 41B through the condensed water piping 47A. The condensed water 53 collected at the bottom of the condenser 41B is boosted by the pump 46B and guided into the condenser 41C through the condensed water piping 47B. The condensed water 53 accumulated at the bottom of the condenser 41C is boosted by the pump 46C and guided into the condenser 41D through the condensed water piping 47C. The condensed water 53 collected at the bottom of the condenser 41D is boosted by the pump 46D and supplied into the feed water pipe 10 through the condensed water pipe 47D. Condensed water 53 having a high temperature in the

condensers

41A, 41B, 41C and 41D is supplied to the nuclear reactor 3 together with water supply.

In this embodiment, since the boiling water nuclear power plant 2 is used, power generation can be performed.

In this embodiment, the cooling water discharged from the condenser 8 is guided to the

heaters

24, 25, and 26 by the hot water pipe 22 and heated in the

heaters

24, 25, and 26 to generate hot water that is subcritical water. is doing. Steam extracted from the low-pressure turbine 5 and the high-pressure turbine 4 is used to generate the hot water. Since it is necessary to cover the amount of extracted steam supplied to the heater 26 in addition to the amount of extracted steam led to the high-pressure feed water heater 11, the amount of steam extracted from the high-pressure turbine 4 increases by the amount of the latter extracted steam. . Since the amount of extracted steam supplied to the

heaters

24 and 25 in addition to the amount of extracted steam introduced to the low-pressure

feed water heaters

9 and 10 is required, the amount of steam extracted from the low-pressure turbine 5 is also the same as the amount of extracted steam of the latter. Increase by the minute. As a result, the amount of steam exhausted from the low-pressure turbine 5 to the condenser 8 is reduced, and the amount of waste heat due to cooling water (hot wastewater) discharged from the condenser 8 to the external environment (for example, the sea) is reduced. The This reduced amount of waste heat is used to generate hot water by the

heaters

24, 25, and 26. Further, in this embodiment, a part of the cooling water whose temperature is increased by condensing the steam exhausted from the low-pressure turbine 5 to the condenser 8 is used as hot water. The amount is reduced, and the amount of waste heat from hot wastewater is further reduced. The use of the cooling water discharged from the condenser 8 also contributes to the generation of hot water. The cooling water (hot drainage) discharged from the condenser 8 to the cooling water discharge pipe 16 as a raw material for hot water is heated in the condenser 8 due to heating by steam condensation. In order to increase the temperature of water to a predetermined temperature as hot water, the amount of extracted steam supplied to the

heaters

24, 25, and 26 can be reduced.

The cogeneration plant 1 of the present embodiment in which the steam extracted from the low pressure turbine 5 and the high pressure turbine 4 is condensed by the

heaters

24, 25, and 26 by the cooling water supplied by the hot water pipe 22 is as follows. It can be said that power generation is based on the new concept described.

The boiling water nuclear power plant 2 uses the steam generated by the reactor 3, that is, the steam generator as a high-temperature heat source, and generates power using the cooling water supplied to the condenser 8 through the cooling water supply pipe 15 as a low-temperature heat source. At the same time, power is generated using the steam as a high-temperature heat source and the cooling water supplied to the

heaters

24, 25, and 26 to condense the steam extracted from the turbine as a low-temperature heat source. In the cogeneration plant 1, the cooling water supplied to the

heaters

24, 25, and 26 contributes to power generation in the boiling water nuclear power plant 2 and is hot water. Such a new concept of power generation in the cogeneration plant 1 reduces the amount of waste heat of the hot effluent discharged from the condenser 8 to the external environment, resulting in the generation of hot water.

In this embodiment, the condensed water respectively generated by the

heaters

24, 25, and 26 is guided to the water supply pipe 12 and supplied to the nuclear reactor 3. For this reason, the amount of heat possessed by these condensed water can be used in the boiling water nuclear power plant 2. Condensed water generated in each condenser of the steam heat pump device 36 is also guided to the water supply pipe 12 and supplied to the nuclear reactor 3. For this reason, the amount of heat possessed by the condensed water can be used in the boiling water nuclear power plant 2. Thus, since the condensed water generated in the hot water generator 21 is returned to the nuclear reactor 3, the thermal efficiency of the boiling water nuclear power plant 2 is improved.

The

extraction pipes

27, 28, and 29 for supplying the extraction steam to each of the

heaters

24, 25, and 26 are not directly connected to the casing of the corresponding turbine. As described above, the extraction steam is supplied to the low-pressure feed water heater 9. The extraction pipe 17 to be supplied is connected to the extraction pipe 18 for supplying the extraction steam to the low-pressure feed water heater 10, and the extraction pipe 19 to supply the extraction steam to the high-pressure feed water heater 11. For this reason, the number of extraction points in the low pressure turbine 5 and the high pressure turbine 4 is reduced, and the extraction structure can be simplified. Further, the length of each of the

bleed pipes

27, 28, and 29 is shortened, and the time required for installing these bleed pipes can be shortened.

The cogeneration plant 1 of this embodiment has a steam heat pump device 36. By installing the steam heat pump device 36, the following effects can be obtained.

First, by providing the steam heat pump device 36, the temperature of the hot water discharged from the steam heat pump device 36 to the hot water pipe 22 can be easily adjusted. That is, the temperature of each steam compressed by each of the

compressors

37A, 37B, 37C, and 37D can be changed by changing the rotation speed of the motor 38. Specifically, when the rotation speed of the motor 38 is small, the temperature of each steam is lowered, and when the rotation speed is increased, the temperature of each steam is lowered. As a result, the temperature of the hot water heated by each of the

condensers

41A, 43B, 43C and 43D of the steam heat pump device 36 can be adjusted by changing the temperature of the steam supplied to each condenser.

Secondly, the number of heaters (including condensers) in the hot water generator 21 can be increased without being restricted by the number of steam extraction points in the high-pressure turbine 4 and the low-pressure turbine 5, Water heating efficiency can be improved. The steam supplied to the steam heat pump device 36 is extracted from one extraction point formed in the turbine casing of the high-pressure turbine 4. A plurality of compressors (for example,

compressors

37A, 37B, 37C, and 37D) are provided for the one extraction point, and condensers (for example,

condensers

41A and 41B) that are heaters for the respective compressors. , 41C and 41D). Thus, by providing the steam heat pump device 36, a plurality of compressors and a plurality of condensers can be provided, so the number of heaters in the hot water generator 21 can be increased and hot water can be increased. Heating efficiency can be improved. Furthermore, the temperature of the hot water generated by the

heaters

24, 25, 26 can be further increased by the steam heat pump device 36.

The installation of the

heaters

24, 25, and 26 is restricted by the number of steam extraction points in the high-pressure turbine 4 and the low-pressure turbine 5. The extraction pipe for supplying the extraction steam to these heaters needs to be connected to the turbine casing at a position between the rotor blades in the axial direction of the turbine in order to avoid a decrease in efficiency of the turbine. In order to obtain extracted steam at different temperatures from a plurality of extracted points, it is necessary to set the extracted points at positions between different moving blades. On the other hand, in the steam heat pump device 36, as described above, the number of compressor stages and the number of condensers can be increased regardless of the number of extraction points provided in the turbine.

A cogeneration plant according to embodiment 2, which is another embodiment of the present invention, will be described with reference to FIG. The cogeneration plant 1A of the present embodiment includes a boiling water nuclear power plant 2 and a hot water generator 21A.

The hot water generator 21A has a configuration in which the

heaters

25 and 26, the

extraction pipes

28 and 29, and the

condensed water pipes

32 and 34 are removed from the hot water generator 21 used in the first embodiment. The other configuration of the hot water generator 21A is the same as that of the hot water generator 21. The steam heat pump device 36 used in the hot water generator 21 A is associated with the number of stages of the compressor and the compressor rather than the steam heat pump device 36 used in the hot water generator 21 because the

heaters

25 and 26 are not installed. The number of condensers to be used is increasing. In the present embodiment, in the steam heat pump device 36, the extraction pipe 48 connected to the first stage compressor 37 A is connected to the extraction pipe 18 connected to the turbine casing of the low-pressure turbine 5. A condensed water pipe 47D is connected to the bottom of the condenser connected to the final stage compressor. An on-off valve 51 is provided in the condensed water pipe 47D. A condensed water pipe 49 connected to the condensed water pipe 47 D upstream of the on-off valve 51 is connected to the water supply pipe 12 between the low-pressure feed water heater 10 and the feed water pump 13. A condensed water pipe 52 connected to the low-pressure feed water heater 10 is connected to the feed water pipe 12. A condensed water pipe 56 connected to the high-pressure feed water heater 11 is connected to the feed water pipe 12.

The cooling water flowing into the hot water pipe 22 is heated by the heater 24, and further heated by the steam compressed by each compressor in each condenser of the steam heat pump device 36, and hot water (subcritical water) having a predetermined temperature. )become. The steam supplied to the first stage compressor 37 A of the steam heat pump device 36 is a part of the steam extracted from the low pressure turbine 5 by the extraction pipe 18. The hot water discharged from the steam heat pump device 36 is guided to a facility that requires hot water through the hot water pipe 22.

This example can also obtain each effect produced in Example 1. As in the first embodiment, the temperature of the steam compressed by each compressor can be changed by controlling the rotation speed of the motor 38. A control device (not shown) controls opening and closing of the on-off

valves

50 and 51 based on the temperature of the condensed water 53 discharged from the condenser connected to the final stage compressor to the condensed water piping 47D. The on-off valve 51 is opened when the on-off valve 50 is closed, and the on-off valve 51 is closed when the on-off valve 50 is opened. If the temperature of the condensed water 53 discharged to the condensed water pipe 47D is equal to or lower than the set temperature, the on-off valve 50 is opened and the on-off valve 51 is closed, and the condensed water 53 is guided to the water supply pipe 12 through the condensed water pipe 49. When the temperature of the condensed water 53 discharged into the condensed water pipe 47D exceeds the set temperature, the on-off valve 50 is closed and the on-off valve 51 is opened, and the condensed water 53 is guided to the water supply pipe 12 through the condensed water pipe 47D. Thus, the discharge destination of the condensed water 53 can be changed based on the temperature of the condensed water 53 discharged from the steam heat pump device 36.

In the present embodiment, since the hot water generator 21A does not have the

heaters

25 and 26 provided in the hot water generator 21, these heaters and the extraction provided in association with these heaters are used. The

tracheas

28 and 29 and the

condensed water pipes

32 and 34 are unnecessary. For this reason, since the drawing of the extraction pipe and the condensed water pipe is reduced, the time required for the construction of the hot water generator 21A is shorter than that of the hot water generator 21.

A cogeneration plant according to embodiment 3, which is another embodiment of the present invention, will be described with reference to FIG. The cogeneration plant 1B of the present embodiment includes a boiling water nuclear power plant 2 and a hot water generator 21B.

The hot water generator 21B has a configuration in which the heater 24, the extraction pipe 27, and the condensed water pipe 30 are removed from the hot water generator 21A used in the second embodiment. Other configurations of the hot water generator 21B are the same as the hot water generator 21A. The steam heat pump device 36 used in the hot water generator 21B is not provided with the heater 24, so that the number of stages of the compressor and the condensation associated with the compressor are higher than those of the steam heat pump device 36 used in the hot water generator 21A. The number of vessels is increasing. In the present embodiment, in the steam heat pump device 36, the extraction pipe 48 connected to the first stage compressor 37 A is connected to the steam space in the condenser 8. A condensed water pipe 57 connected to the low-pressure feed water heater 9 is connected to the feed water pipe 12.

The extraction pipe 48 is not located in the steam space in the condenser 8 but at a certain position of the main steam system having the high pressure turbine 4, the low pressure turbine 5 and the main steam pipe 7 (for example, provided in the casing of the high pressure turbine 4 or the low pressure turbine 5. Connected bleed points).

The steam extracted from the condenser 8 and guided by the extraction pipe 48 is sequentially compressed by each compressor of the steam heat pump device 36. The cooling water flowing into the hot water pipe 22 is heated by steam compressed by each compressor in each condenser of the steam heat pump device 36 to become hot water (subcritical water) having a predetermined temperature. The hot water discharged from the steam heat pump device 36 is guided to a facility that requires hot water through the hot water pipe 22.

This example can obtain each effect produced in Example 2. In the present embodiment, the heater 24 is unnecessary as compared with the second embodiment, so that the time required for the construction of the hot water generator 21B is further shortened than that of the hot water generator 21A.

A biomass reforming combined power plant according to another embodiment of the present invention will be described with reference to FIGS. The biomass reforming combined power plant 60 of this embodiment includes the cogeneration power plant 1 and the biomass reforming device 61. The cogeneration plant 1 used in the present embodiment is the cogeneration plant 1 of the first embodiment. In the biomass reforming combined power plant 60, instead of the cogeneration plant 1, any of the above-mentioned

cogeneration plants

1A and 1B may be used.

In the biomass reforming combined power plant 60, the biomass reforming device 61 is connected to the hot water pipe 22 connected to the outlet side of the steam heat pump device 36 of the hot water generating device 21 included in the cogeneration plant 1.

The biomass reforming device 61 includes a reactor 62, a separator 63, and a cooler 76. A reactor 62 is connected to the hot water pipe 22. The separator 63 is connected to the reactor 62 by a pipe 65 provided with a valve 63. The biomass supply pipe 84 is connected to the reactor 62, and the

recovery pipes

67, 68, and 69 are connected to the separator 63, respectively. The cooler 76 is connected to the separator 63, and the cooling water pipe 80, the condensed water pipe 81, and the recovery pipe 82 are connected to the cooler 76.

The detailed configuration of the biomass reforming apparatus 61 will be described with reference to FIG. The biomass reformer 61 includes a plurality of reactors 62 (for example,

reactors

62a, 62b, and 62c), a plurality of separators 63 (for example,

separators

63a, 63b, and 63c), and a plurality of coolers 76 (for example, cooling).

Devices

76a, 76b, 76c). The

reactors

63a, 63b, 63c are connected to the hot water pipe 22 via

valves

64a, 64b, 64c. The biomass supply pipe 84 is connected to the reactor 63a via the valve 85a, connected to the reactor 63b via the valve 85b, and connected to the reactor 63c via the valve 85c.

The separator 63a is connected to the reactor 63a by a pipe 65a provided with a valve 66a, the separator 63b is connected to the reactor 63b by a pipe 65b provided with a valve 66b, and the separator 63c is provided with a valve 66c. The pipe 65c is connected to the reactor 63c.

Recovery pipes

67, 68 and 69 are connected to the separator 63a. Although not shown,

other recovery pipes

67, 68 and 69 are connected to the separator 63b, and

further recovery pipes

67, 68 and 69 are connected to the separator 63c.

The separator 63a is connected to the pipe 70 via the valve 73a, connected to the pipe 71 via the valve 73b, and further connected to the pipe 72 via the valve 73c. The separator 63b is connected to the pipe 70 via the valve 74a, is connected to the pipe 71 via the valve 74b, and is further connected to the pipe 72 via the valve 74c. The separator 63c is connected to the pipe 70 via the valve 75a, connected to the pipe 71 via the valve 75b, and further connected to the pipe 72 via the valve 75c.

The

coolers

76a, 76b and 76c are provided with

heat transfer tubes

83a, 83b and 83c. A cooling water pipe 80 connects the

heat transfer tubes

83a, 83b, 83c in this order from upstream to downstream. The shell side of the cooler 76 a is connected to the pipe 70 by the pipe 77, the shell side of the cooler 76 b is connected to the pipe 71 by the pipe 78, and the shell side of the cooler 76 c is connected to the pipe 72 by the pipe 79. A condensed water pipe 81a is connected to the cooler 76a. The condensed water piping 81b is connected to the cooler 76a and the cooler 76b. The condensed water piping 81c is connected to the cooler 76b and the cooler 76c. A recovery pipe 82 is connected to each shell side of the

coolers

76a, 76b, and 76c.

∙ As biomass, solid biomass such as wood, vegetation, seeds, seaweed and plastic is assumed. A feature of biomass is that it contains multiple components rather than a single component. Taking wood as an example, wood mainly contains polymer compounds of cellulose, hemicellulose, and lignin, and moisture and a trace amount of metal elements are added to these. Such biomass is filled in the

reactors

62a, 62b, and 62c, respectively. This filled biomass is usually in a state where wood, vegetation, seeds and the like are mixed.

The reforming of biomass with subcritical water mainly includes the first and second processes. The first process is a process in which these miscellaneous components including a polymer compound that is biomass are reduced in molecular weight with high-temperature and high-pressure subcritical water and dissolved in subcritical water. The second process is a process in which high-temperature and high-pressure subcritical water is depressurized and depressurized to separate and recover a low molecular weight and dissolved product.

This biomass reforming method will be specifically described using the biomass reforming apparatus 61 shown in FIG. The valve 85a is opened, the

valves

85b and 85c are closed, and solid biomass pulverized in advance is charged into one reactor 62a through the biomass supply pipe 84. After filling the reactor 62a with biomass, the valve 85a is closed, the valve 64a is opened, and hot water, which is subcritical water, is supplied from the hot water pipe 22 to the reactor 62a filled with solid biomass. The valve 66a is closed. In the reactor 62a, a reforming reaction of solid biomass by hot water occurs. When a predetermined time for completing the reforming reaction has elapsed, the valve 64a is closed and the valve 66a is opened, and hot water and the dissolved product are introduced into the separator 63a. By supplying it into the separator 63a, the volume of the hot water and the dissolved product expands, and the hot water is depressurized and boiled. In addition, the volatile product is gasified in the separator 63a.

Before closing the valve 64a, the valve 85b is opened and the solid biomass pulverized by the biomass supply pipe 84 is supplied to the reactor 62b. After filling the reactor 62b with biomass, the valve 85b is closed. When the valve 64a is closed to open the valve 66a as described above, the valve 64b is opened and hot water is supplied from the hot water pipe 22 to the reactor 62b. The valve 66b is closed. In the reactor 62b, a reforming reaction of solid biomass occurs as in the reactor 62a.

The

valves

73a, 73b, 73c provided in the three pipes connected to the separator 63a are opened. The volatile gas generated in the separator 63a and the steam generated from the hot water by boiling under reduced pressure are separated from the hot water and the product in the separator 63a, cooled through the valve 73a and the

pipes

70 and 77. Is supplied to the container 76a. The separated volatile gas and vapor in the separator 63a pass through the valve 73b and are supplied to the cooler 76b through the

pipes

71 and 78. Further, the separated volatile gas and vapor in the separator 63a are supplied to the cooler 76c through the valves 73c and the

pipes

72 and 79. Cooling water is supplied from the cooling water pipe 80 into the

heat transfer tubes

83a, 83b, 83c in the

coolers

76a, 76b, 76c. For this reason, the vapor | steam which flowed with volatile gas is each condensed with the cooling water in the

coolers

76a, 76b, and 76c. Condensed water generated by this condensation accumulates at the bottom of each of the

coolers

76a, 76b and 76c. The

valves

74a, 74b, 74c, 75a, 75b, and 75c are closed when volatile gas and vapor are discharged from the separator 63a to the respective coolers.

The condensed water in the cooler 76c is collected in the cooler 76b by the condensed water pipe 81c, and is further collected in the cooler 76a by the condensed water pipe 81b together with the condensed water generated in the cooler 76b. The condensed water generated in the cooler 76a and the condensed water collected in the cooler 76a are discharged to the condensed water pipe 81a. Each volatile gas in the

coolers

76a, 76b, and 76c is recovered by a recovery pipe 82.

The discharge of volatile gas and steam to each cooler lowers the internal pressure of the separator 63a and keeps the separator 63a in a low pressure state. Even after discharge of volatile gas and vapor, hot water and products remain in the separator 63a. When time elapses, the temperature of the hot water and the product in the separator 63a decreases to near the temperature of the cooling water supplied to the cooler 76a through the cooling water pipe 80. In the separator 63a, the product dissolved in the hot water is precipitated as fats and oils as the temperature decreases. Oils and fats in the separator 63a are recovered by a recovery pipe 67 connected to the separator 63a, and solids are recovered by a recovery pipe 69 connected to the separator 63a. Hot water and dissolved matter remaining in the separator 63a are recovered by a recovery pipe 68 connected to the separator 63a. The cooling water supplied by the cooling water pipe 80 is heated by each of the

coolers

76a, 76b, and 76c to become hot water. The heat of hot water supplied in this way can be recovered as warm water by a cooler.

When the reforming reaction of the solid biomass in the reactor 62b is completed, the valve 64b is closed and the valve 66b is opened, and hot water and the dissolved product are introduced into the separator 63b. Similarly to the separator 63a, volatile gas and vapor are generated in the separator 63b. After the discharge of the volatile gas and vapor in the separator 63a to the

coolers

76a, 76b, 76c is completed, the

valves

73a, 73b, 73c are closed and the valves 74a, 74b, 74c are opened. The volatile gas and vapor in the separator 63b are supplied to the

coolers

76a, 76b, and 76c to which the cooling water is supplied by the cooling water pipe 80 through the corresponding pipes. Steam is condensed in each cooler, and condensed water is discharged to the condensed water pipe 81a. Each volatile gas in the

coolers

76a, 76b, and 76c is recovered by a recovery pipe 82. Oils and fats in the separator 63b are recovered by a recovery pipe 67 connected to the separator 63b, and solids are recovered by a recovery pipe 69 connected to the separator 63b. Hot water and dissolved matter remaining in the separator 63b are recovered by a recovery pipe 68 connected to the separator 63b.

Before closing the valve 64b, the valve 85c is opened, and the solid biomass pulverized by the biomass supply pipe 84 is supplied to the reactor 62c. After filling the reactor 62c with biomass, the valve 85c is closed. When the valve 64b is closed to open the valve 66b, the valve 64c is opened to supply hot water from the hot water pipe 22 to the reactor 62c. The valve 66c is closed. In the reactor 62c, a reforming reaction of solid biomass occurs as in the reactor 62a.

When the reforming reaction of the solid biomass in the reactor 62c is completed, the valve 64c is closed and the valve 66c is opened, and hot water and the dissolved product are introduced into the separator 63c. Similarly to the separator 63a, volatile gas and vapor are also generated in the separator 63c. After the discharge of the volatile gas and vapor in the separator 63b to the

coolers

76a, 76b, and 76c is completed, the valves 74a, 74b, and 74c are closed and the

valves

75a, 75b, and 75c are opened. The volatile gas and steam in the separator 63c are supplied to the

coolers

76a, 76b, and 76c is recovered by a recovery pipe 82. Oils and fats in the separator 63c are recovered by a recovery pipe 67 connected to the separator 63c, and solids are recovered by a recovery pipe 69 connected to the separator 63c. Hot water and dissolved matter remaining in the separator 63c are recovered by a recovery pipe 68 connected to the separator 63c.

Before closing the valve 64c, for example, the valve 85a is opened and solid biomass pulverized by the biomass supply pipe 84 is supplied to the reactor 62a. After filling the reactor 62a with biomass, the valve 85a is closed. When the valve 64c is closed to open the valve 66c, the valve 64a is opened again to supply hot water from the hot water pipe 22 to the reactor 62a. The valve 66a is closed. As described above, the reforming reaction of the solid biomass using the hot water generated by the hot water generator 21 is sequentially performed in the

reactors

62a, 62b, and 62c.

The volatile gas recovered by the recovery pipe 82 is, for example, methane obtained by decomposing a polymer. The melt | dissolution substance contained in the hot water collect | recovered with the collection piping 68 is saccharides, for example. The solid recovered by the recovery pipe 69 is, for example, a trace amount of metals. The fats and oils recovered by the recovery pipe 67 and the organic compounds such as sugars recovered by the recovery pipe 68 are reformed to ethanol or the like by another process.

This example can obtain the effect produced in Example 1 in the cogeneration plant 1.

The biomass reformer 61 used in the present embodiment can perform the first process by batch processing, that is, by switching the

reactors

62a, 62b, and 62c. For this reason, the hot water (subcritical water) produced | generated by the hot water generator 21 can be supplied to

reactor

62a, 62b, 62c in order, and the hot water produced | generated by the hot water generator 21 can be used effectively. Can be used.

The reason why the

coolers

76a, 76b, and 76c are connected in series will be described. It is preferable to collect each product from the

separators

63a, 63b, and 63c at room temperature. However, it is desirable that the temperature is as high as possible from the viewpoint of recovering heat. Therefore, the

coolers

76a, 76b, and 76c are connected in series, and the volatile gas and the high-temperature steam in one separator (for example, the separator 63a) are supplied to three valves (for example, the

valves

73a, 73b, and 73c). Are substantially simultaneously opened and supplied to the

coolers

76a, 76b and 76c to which the cooling water is supplied by the cooling water pipe 80. The cooling water can be heated by condensing steam in the

coolers

76a, 76b, and 76c, and high-temperature hot water can be obtained. The above three valves (for example, the

valves

73a, 73b, and 73c) are opened and closed in synchronization with the switching operation of the inlet valve and the outlet valve (for example, the

valves

64c and 66c for the reactor 62c) of one reactor. . As a result, any one of the

separators

63a, 63b, and 63c is connected to the

coolers

76a, 76b, and 76c. By connecting one separator to the

coolers

76a, 76b, and 76c in this way, the separator can be quickly brought to room temperature, and the temperature of the hot water discharged from the cooler 76c located on the most downstream side can be increased. .

The biomass reforming apparatus used in the biomass reforming combined power plant 60 of this embodiment is different from the biomass reforming apparatus 61 described in US Pat. No. 7,476,296, instead of the batch processing biomass reforming apparatus 61. This type of biomass reformer may be used.

A cogeneration plant according to another embodiment of the present invention will be described with reference to FIG. The cogeneration plant 1C of the present embodiment includes a boiling water nuclear power plant 2 and a hot water generator 21C. The hot water generator 21C has a configuration in which the hot water pipe 22 is connected to the cooling water supply pipe 15 instead of the cooling water discharge pipe 16 in the hot water generator 21 used in the first embodiment. Other configurations of the hot water generator 21C are the same as those of the hot water generator 21.

The difference from Example 1 will be described. Since the hot water pipe 22 is connected to the cooling water supply pipe 15, the cooling water having a low temperature before being supplied to the heat transfer pipe 14 of the condenser 8 during the operation of the cogeneration plant 1C is supplied with the cooling water. The hot water pipe 22 is supplied from the pipe 15. In the

heaters

24, 25, and 26, the steam extracted from the main steam system of the boiling water nuclear power plant 2 such as the low pressure turbine 5 and the high pressure turbine 4 is heated in the same manner as in the first embodiment. In the present embodiment, since the cooling water having a low temperature is supplied to the hot water pipe 22, the temperature of each steam supplied to the corresponding heater by the

extraction pipes

27, 28, and 29 is the extraction pipe 27 in the first embodiment. , 28, 29 are preferably higher than the temperature of the respective steam supplied to the corresponding heater. For this reason, the extraction pipe 27 connected to the heater 24 is not connected to the extraction pipe 17 but connected to the low-pressure turbine 5 at a position upstream of the connection position of the extraction pipe 17 to the low-pressure turbine 5. The extraction pipe 28 connected to the heater 25 is not the extraction pipe 18 but upstream of the new connection position of the extraction pipe 27 to the low-pressure turbine 5 and upstream of the connection position of the extraction pipe 18 to the low-pressure turbine 5. Connected to the low pressure turbine 5 in position. The extraction pipe 29 connected to the heater 26 is connected to the high-pressure turbine 4 at a position upstream of the connection position of the extraction pipe 19 to the high-pressure turbine 4, not the extraction pipe 19. As described above, the connection position of the

extraction pipes

27, 28, and 29 to the corresponding turbine is also moved to the upstream side in the first embodiment, so that the extraction steam having a higher temperature is transferred to the corresponding heater. Can be supplied. The extraction pipe 48 connected to the steam compressor 37 A of the steam heat pump device 36 is connected to the extraction pipe 29. In the present embodiment, the temperature of the steam supplied to the steam compressor 37A is higher than that in the first embodiment.

Also in this embodiment, hot water (subcritical water) is discharged from the heater 26 to the hot water pipe 22. This hot water is heated by the steam heat pump device 36 to become hot water (subcritical water) having a higher temperature.

This embodiment has the effect of reducing the amount of waste heat generated by using the cooling water discharged from the condenser 8 as the raw material for hot water, and the effect of reducing the extraction point by connecting the extraction tube 27 to the extraction tube 17. Except for this, each effect produced in the first embodiment can be obtained.

In the above-described Examples 2 to 4, the connection of the hot water pipe 22 to the cooling water discharge pipe 16 may be changed to the connection of the hot water pipe 22 to the cooling water supply pipe 15 as in the present embodiment.

A cogeneration plant according to another embodiment of the present invention will be described with reference to FIG. The cogeneration plant 1D of the present embodiment includes a boiling water nuclear power plant 2 and a hot water generator 21D. The hot water generator 21D is provided with a return pipe 86 for returning the hot water drainage used in the hot water utilization facility 90 to which hot water is supplied by the hot water pipe 22 in the hot water generator 21 used in the first embodiment. And a configuration connected to the hot water pipe 22. Furthermore, the hot water generator 21 D includes a flow rate adjustment valve 87, a flow meter 88, and a controller 89. Other configurations of the hot water generator 21D are the same as those of the hot water generator 21.

The difference from Example 1 will be described. A return pipe 86 connected to hot water utilization equipment (for example, a biomass reformer or hydrothermal synthesizer) 90 connected to the hot water pipe 22 is connected to the hot water pipe 22 upstream of the pump 23. A flow control valve 87 is provided in the hot water pipe 22 upstream of the connection point between the return pipe 86 and the hot water pipe 22. A flow meter 88 is provided in the hot water pipe 22 between the pump 23 and the heater 24. A controller 89 is connected to the flow control valve 87 and the flow meter 88.

During operation of the cogeneration plant 1D, hot water that is subcritical water is generated by the

heaters

24, 25, and 26 and the steam heat pump device 36 as in the first embodiment. The hot water is supplied to the hot water utilization facility 90 through the hot water pipe 22 and used in the hot water utilization facility 90. The temperature of the hot water used in the hot water utilization facility 90 decreases and is discharged to the return pipe 86 as drainage. This waste water is returned to the hot water pipe 22 through the return pipe 86 and mixed with the cooling water discharged from the condenser 8 to the cooling water discharge pipe 16 flowing in the hot water pipe 22. The wastewater mixed with the cooling water is boosted by the pump 23, supplied to the

heaters

24, 25, etc., and heated together with the cooling water. The temperature of the waste water flowing in the return pipe 86 is higher than the temperature of the cooling water supplied to the condenser 8 by the cooling water supply pipe 15.

In order to adjust the flow rate of hot water supplied to the hot water use facility 90 by the hot water pipe 22 to the flow rate of hot water required by the hot water use facility 90, It is necessary to reduce the flow rate of the cooling water supplied from the cooling water discharge pipe 16 to the hot water pipe 22 by the flow rate. The flow rate of the mixed water of the cooling water and the drainage discharged from the pump 23 is measured by the flow meter 88. The controller 89 inputs the flow rate measured by the flow meter 88, and based on this flow rate, opens the flow rate control valve 87 so that the flow rate of hot water supplied to the hot water utilization facility 90 becomes a flow rate set value. Adjust. When the flow rate of the waste water supplied from the return pipe 86 to the hot water pipe 22 is large by the opening degree control of the flow rate control valve 87, the flow rate of the cooling water supplied from the cooling water discharge pipe 16 to the hot water pipe 22 is reduced and returned. When the flow rate of the waste water supplied from the pipe 86 to the hot water pipe 22 is small, the flow rate of the cooling water supplied from the cooling water discharge pipe 16 to the hot water pipe 22 is increased. The flow rate of the cooling water supplied from the cooling water discharge pipe 16 to the hot water pipe 22 is the flow rate of hot water supplied to the hot water utilization facility 90 by the hot water pipe 22 and discharged from the hot water utilization facility 90 to the return pipe 86. It is the difference from the flow rate of the waste water, and is the amount of hot water consumed in the hot water utilization facility 90.

This example can obtain each effect produced in Example 1. In the present embodiment, since the drainage is supplied from the return pipe 86 to the hot water pipe 22, the flow rate of the cooling water supplied from the cooling water discharge pipe 16 to the hot water pipe 22 is smaller than that in the first embodiment. For this reason, compared with Example 1, the present Example increases the amount of waste heat discharged from the condenser 8 to the external environment.

When the hot water utilization facility 90 shown in FIG. 14 is a biomass reformer (for example, the biomass reformer 61 shown in FIGS. 11 and 12), the cogeneration plant 1D shown in FIG. Is a biomass reforming combined power plant including the cogeneration plant 1D and the biomass reforming device 61. In this combined biomass reforming power plant, the hot water pipe 22 of the cogeneration plant 1D is connected to the

reactors

62a, 62b, 62c of the biomass reforming device 61 as shown in FIG. 12) is connected to the hot water pipe 22 between the pump 23 and the flow rate adjusting valve 87 as a return pipe 86.

Part of the hot water supplied to each of the

reactors

62a, 62b, and 62c is collected from the

separators

63a, 63b, and 63c to the

recovery pipes

67, 68, and 69 together with the recovered products (oil, dissolved matter, solid, etc.). Each is discharged. The remaining hot water vapor discharged from the

separators

63a, 63b, and 63c to the

coolers

76a, 76b, and 76c is condensed by the

coolers

76a, 76b, and 76c to be condensed water, and the condensed water returns as waste water. The hot water pipe 22 is supplied through the pipe 86. Cooling water having a flow rate obtained by subtracting the flow rate of the condensed water discharged from each of the

coolers

76a, 76b, and 76c to the return pipe 86 from the flow rate of hot water respectively supplied to the

reactors

62a, 62b, and 62c The hot water pipe 22 is supplied from the cooling water discharge pipe 16 by controlling the opening degree of the valve 87.

This biomass reforming combined power plant can obtain the above-described effects obtained by the combined heat and power generation plant 1D and the effects brought about by the biomass reforming apparatus 61 in the fourth embodiment.

In the cogeneration plant 1D shown in FIG. 14, the connection of the hot water pipe 22 to the cooling water discharge pipe 16 is changed to the connection of the hot water pipe 22 to the cooling water supply pipe 15 as in the fifth embodiment. Also good.

When the hot water utilization facility 90 shown in FIG. 14 is a hot water utilization facility that uses only the heat of the hot water supplied through the hot water supply pipe 22, the hot water utilization facility 90 returns to the return pipe 86. The flow rate of the discharged waste water is the same as the flow rate of hot water supplied by the hot water pipe 22. When such a hot water utilization facility is used, in the hot water generator 21D of the cogeneration plant 1D, the hot water pipe 22 is connected to the return pipe 86, and the cooling water supply pipe 15 and the cooling water discharge interval 16 are connected. Is not connected to.

In Examples 1 to 6, the boiling water nuclear power plant 2 may be replaced with any other type of nuclear power plant such as a pressurized water nuclear power plant, and a thermal power plant. In the pressurized water nuclear power plant, the steam generator is a steam generator, and in the thermal power plant, the steam generator is a boiler.

The present invention can be applied to a combined heat and power generation plant using a power plant such as a nuclear power plant and a thermal power plant.

1, 1A, 1B, 1C, 1D ... cogeneration plant, 2 ... boiling water nuclear power plant, 3 ... nuclear reactor (steam generator), 4 ... high pressure turbine, 5 ... low pressure turbine, 8 ... condenser, DESCRIPTION OF

SYMBOLS

9,10 ... Low pressure feed water heater, 11 ... High pressure feed water heater, 12 ... Feed water piping, 14 ... Heat transfer pipe, 15 ... Cooling water supply pipe, 16 ... Cooling water discharge pipe, 17, 18, 19, 27, 28, 29 ... Bleeding pipe, 21, 21A, 21B, 21C, 21D ... Hot water generator, 22 ... Hot water pipe, 24, 25, 26 ... Heater, 36 ... Steam heat pump device, 37A, 37B, 37C, 37D ... Compressor , 38 ... motor, 41A, 41B, 41C, 41D ... condenser, 43A, 43B, 43C ... moisture separator, 60 ... biomass reforming combined power plant, 61 ... biomass reforming device, 62, 62a, 62b, 62c ... anti Vessel, 63, 63a, 63 b, 63c ... separator, 76, 76a, 76 b, 76c ... cooler, 86 ... return pipe, 90 ... hot water utilizing facility.

Claims

A steam generator for converting water into steam, a turbine to which the steam is supplied from the steam generator, a condenser for condensing the steam exhausted from the turbine, and a hot water generator,
The hot water generator is provided in the first pipe connected to the second pipe, a second pipe for guiding the steam extracted from the turbine, a first pipe for guiding water, and the first pipe. And a plurality of heating devices for heating the water guided by the above-mentioned steam supplied by the second pipe.
The second pipe includes a first extraction pipe that guides the steam extracted from the turbine, and a second extraction pipe that guides the steam extracted from the turbine,
The first heating device included in the plurality of heating devices is connected to the first extraction pipe, and the steam heat pump device that is the second heating device included in the plurality of heating devices is more than the first heating device. Provided in the first pipe downstream;
The steam heat pump device forms a pair for each of the plurality of compressors arranged in order to compress the steam guided by the second extraction pipe in order, and the first pipe A plurality of steam cooling units connected to a steam supply pipe for guiding the steam compressed by the pair of compressors, and further heating the heated water flowing in the first pipe by the steam. Having a device,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. The cogeneration plant according to claim 1, wherein the other one of the compressors is connected by a steam exhaust pipe.
The condenser and the steam generator are connected to each other, and the feed water generated by condensing the steam in the condenser is guided to the steam generator, and is connected to the turbine and extracted from the turbine. A third bleed pipe for guiding the steam, a fourth bleed pipe for guiding the steam extracted from the turbine connected to the turbine at a position upstream from a position where the third bleed pipe is connected, A first feed water heater provided on the feed water pipe and connected to the third bleed pipe, and a fourth feed pipe connected to the feed water pipe and connected to the fourth bleed pipe, arranged downstream of the first feed water heater. A second feed water heater,
The cogeneration plant according to claim 2, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe is connected to the fourth extraction pipe.
The turbine includes a high-pressure turbine to which the steam is supplied from the steam generator, and a low-pressure turbine to which the steam exhausted from the high-pressure turbine is supplied;
The second pipe includes a first extraction pipe that guides the steam extracted from the low-pressure turbine, and a second extraction pipe that guides the steam extracted from the high-pressure turbine,
A first heating device included in the plurality of heating devices is connected to the first extraction pipe, and a second heating device included in the plurality of heating devices is downstream of the first heating device and the first heating device. The combined heat and power generation plant according to claim 1, further comprising a pipe and further connected to the second extraction pipe.
The low pressure turbine connected to the low pressure turbine, connected to the low pressure turbine, and connected to the low pressure turbine, connecting the condenser and the steam generator, and leading the feed water generated by condensing the steam in the condenser to the steam generator A third bleed pipe for guiding the steam extracted from the fourth high pressure turbine; a fourth bleed pipe for connecting the steam extracted from the high pressure turbine; and the third bleed pipe provided in the water supply pipe. Is connected to the first feed water heater, and the second feed water heater is provided downstream of the first feed water heater.
The cogeneration plant according to claim 4, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe is connected to the fourth extraction pipe.
One of the plurality of heating devices is a steam heat pump device, the steam heat pump device is arranged downstream of the second heating device, and the second pipe further guides the steam extracted from the high-pressure turbine. Including the fifth bleed tube,
The steam heat pump device forms a pair for each of the plurality of stages of compressors arranged so as to sequentially compress the steam guided by the fifth extraction pipe, and the first pipe A plurality of steam cooling units connected to a steam supply pipe for guiding the steam compressed by the pair of compressors, and further heating the heated water flowing in the first pipe by the steam. Having a device,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. The cogeneration plant according to claim 4, wherein the other one of the compressors is connected by a steam exhaust pipe.
The low pressure turbine connected to the low pressure turbine, connected to the low pressure turbine, and connected to the low pressure turbine, connecting the condenser and the steam generator, and leading the feed water generated by condensing the steam in the condenser to the steam generator A third bleed pipe for guiding the steam extracted from the fourth high pressure turbine; a fourth bleed pipe for connecting the steam extracted from the high pressure turbine; and the third bleed pipe provided in the water supply pipe. Is connected to the first feed water heater, and the second feed water heater is provided downstream of the first feed water heater.
The cogeneration plant according to claim 6, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe and the fifth extraction pipe are connected to the fourth extraction pipe.
The first condensate water pipe connecting the first heating device and the feed water pipe, and the second condensate water pipe connecting the steam cooling device and the feed water pipe of each of the steam heat pump devices. The combined heat and power plant described.
6. The cogeneration plant according to claim 5, comprising: a first condensate water pipe connecting the first heating device and the feed water pipe; and a second condensate water pipe connecting the second heating device and the feed water pipe. .
A first condensed water pipe connecting the first heating device and the feed water pipe; a second condensed water pipe connecting the second heating device and the feed water pipe; and the steam cooling device of each of the steam heat pump devices; The cogeneration plant according to claim 7, further comprising a third condensed water pipe connecting the water supply pipe.
A steam generator that converts water into steam, a main steam pipe that is connected to the steam generator and guides the steam, a main steam system that is supplied with the steam through the main steam pipe, and exhausted from the turbine A condenser for condensing the steam, and a hot water generator,
The hot water generator has a first pipe for guiding water, and a steam heat pump device provided in the first pipe,
A plurality of stages of compression in which the steam heat pump device is arranged to sequentially compress the steam guided by a bleed pipe connected to one of the positions of the main steam system and the steam space of the condenser. And a steam supply pipe for connecting the steam compressed by the compressor forming the pair is connected to each of the plurality of stages of compressors and connected to the steam. A plurality of steam cooling devices for further heating the water flowing in the first pipe,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. A combined heat and power plant, connected to another one of the compressors by a steam exhaust pipe.
The first pipe is connected to the condenser, and is connected to a cooling water supply pipe for supplying cooling water for condensing the steam in the condenser, and to the condenser, and the steam is connected to the condenser. The cogeneration plant according to any one of claims 1 to 11, wherein the cogeneration plant is connected to any one of cooling water discharge pipes that condense the cooling water and guide the cooling water discharged from the condenser.
The hot water generated by the hot water generator connected to the first pipe is connected to the hot water use facility supplied by the first pipe, and is discharged from the heat use facility. The cogeneration plant according to any one of claims 1 to 12, wherein a third pipe that guides part of the waste water is connected to the first pipe upstream of the hot water generator.
The cogeneration plant according to claim 1, wherein the hot water generator is a hot water generator that generates the hot water having a temperature in a range of 120 ° C to 370 ° C.
A steam generator for converting water into steam, a turbine to which the steam is supplied from the steam generator, a condenser for condensing the steam exhausted from the turbine, a hot water generator, and the hot water generator A biomass reformer to which hot water, which is subcritical water generated by the apparatus, is supplied,
The hot water generator is connected to the condenser and supplies a cooling water supply pipe for supplying cooling water to condense the steam in the condenser, and connected to the condenser and the condenser in the condenser A first pipe for leading the cooling water connected to one of the cooling water discharge pipes for condensing the steam and leading the cooling water discharged from the condenser, and a second for guiding the steam extracted from the turbine A plurality of heating devices that are connected to the second pipe and are provided in the first pipe and that heat the cooling water guided by the first pipe with the steam supplied by the second pipe; A biomass reforming combined power plant characterized by that.
The second pipe includes a first extraction pipe that guides the steam extracted from the turbine, and a second extraction pipe that guides the steam extracted from the turbine,
The first heating device included in the plurality of heating devices is connected to the first extraction pipe, and the steam heat pump device that is the second heating device included in the plurality of heating devices is more than the first heating device. Provided in the first pipe downstream;
The steam heat pump device forms a pair for each of the plurality of compressors arranged in order to compress the steam guided by the second extraction pipe in order, and the first pipe A plurality of steams connected to a steam supply pipe for guiding the steam compressed by the compressor formed in a pair, and further heating the heated cooling water flowing in the first pipe by the steam A cooling device,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. The biomass reforming combined power plant according to claim 15, which is connected to another one of the compressors by a steam exhaust pipe.
The condenser and the steam generator are connected to each other, and the feed water generated by condensing the steam in the condenser is guided to the steam generator, and is connected to the turbine and extracted from the turbine. A third bleed pipe for guiding the steam, a fourth bleed pipe for guiding the steam extracted from the turbine connected to the turbine at a position upstream from a position where the third bleed pipe is connected, A first feed water heater provided on the feed water pipe and connected to the third bleed pipe, and a fourth feed pipe connected to the feed water pipe and connected to the fourth bleed pipe, arranged downstream of the first feed water heater. A second feed water heater,
The biomass reforming combined power plant according to claim 16, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe is connected to the fourth extraction pipe.
The turbine includes a high-pressure turbine to which the steam is supplied from the steam generator, and a low-pressure turbine to which the steam exhausted from the high-pressure turbine is supplied;
The second pipe includes a first extraction pipe that guides the steam extracted from the low-pressure turbine, and a second extraction pipe that guides the steam extracted from the high-pressure turbine,
A first heating device included in the plurality of heating devices is connected to the first extraction pipe, and a second heating device included in the plurality of heating devices is downstream of the first heating device and the first heating device. The biomass reforming combined power plant according to claim 15 provided in piping and further connected to said 2nd extraction pipe.
The low pressure turbine connected to the low pressure turbine, connected to the low pressure turbine, and connected to the low pressure turbine, connecting the condenser and the steam generator, and leading the feed water generated by condensing the steam in the condenser to the steam generator A third bleed pipe for guiding the steam extracted from the fourth high pressure turbine; a fourth bleed pipe for connecting the steam extracted from the high pressure turbine; and the third bleed pipe provided in the water supply pipe. Is connected to the first feed water heater, and the second feed water heater is provided downstream of the first feed water heater.
The biomass reforming combined power plant according to claim 18, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe is connected to the fourth extraction pipe.
One of the plurality of heating devices is a steam heat pump device, the steam heat pump device is disposed downstream of the second heating device, and the second pipe further guides the steam extracted from the high-pressure turbine. Including the fifth bleed tube,
The steam heat pump device forms a pair for each of the plurality of stages of compressors arranged so as to sequentially compress the steam guided by the fifth extraction pipe, and the first pipe A plurality of steams connected to a steam supply pipe for guiding the steam compressed by the compressor formed in a pair, and further heating the heated cooling water flowing in the first pipe by the steam A cooling device,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. 19. The combined biomass reforming power plant according to claim 18, connected to another one of the compressors by a steam exhaust pipe.
The low pressure turbine connected to the low pressure turbine, connected to the low pressure turbine, and connected to the low pressure turbine, connecting the condenser and the steam generator, and leading the feed water generated by condensing the steam in the condenser to the steam generator A third bleed pipe for guiding the steam extracted from the fourth high pressure turbine; a fourth bleed pipe for connecting the steam extracted from the high pressure turbine; and the third bleed pipe provided in the water supply pipe. Is connected to the first feed water heater, and the second feed water heater is provided downstream of the first feed water heater.
21. The combined biomass reforming power plant according to claim 20, wherein the first extraction pipe is connected to the third extraction pipe, and the second extraction pipe and the fifth extraction pipe are connected to the fourth extraction pipe.
A steam generator that converts water into steam, a main steam pipe that is connected to the steam generator and guides the steam, a main steam system that is supplied with the steam through the main steam pipe, and exhausted from the turbine A condenser that condenses the steam, a hot water generator, and a biomass reformer that is supplied with hot water that is subcritical water generated by the hot water generator,
The hot water generator is connected to the condenser and supplies a cooling water supply pipe for supplying cooling water to condense the steam in the condenser, and connected to the condenser and the condenser in the condenser A steam pipe connected to one of the cooling water discharge pipes for condensing steam and discharging the cooling water discharged from the condenser, and a steam heat pump device provided in the first pipe for guiding the cooling water And
A plurality of stages of compression in which the steam heat pump device is arranged to sequentially compress the steam guided by a bleed pipe connected to one of the positions of the main steam system and the steam space of the condenser. And a steam supply pipe for connecting the steam compressed by the compressor forming the pair is connected to each of the plurality of stages of compressors and connected to the steam. A plurality of steam cooling devices for further heating the heated cooling water flowing in the first pipe,
Except for the steam cooling device to which the compressed steam is supplied from the compressor at the final stage, the steam cooling device to which the steam supply pipe is connected is other than the compressor to which the steam supply pipe is connected. A biomass reforming combined power plant, which is connected to another one of the compressors by a steam exhaust pipe.
The steam cooling of each of the steam heat pump device, the feed water pipe connecting the condenser and the steam generator, and leading the feed water generated by condensing the steam in the condenser to the steam generator. The biomass reforming combined power plant according to claim 22, further comprising a condensate water pipe connecting the apparatus and the water supply pipe.
The biomass reforming apparatus is supplied with the hot water, and is connected to the reactor for reforming biomass with the hot water, and the hot water and a plurality of products generated by the reforming are supplied. The biomass reforming combined power plant according to claim 15 or 22, comprising a separator to be operated.
The third pipe for guiding drainage that is at least part of the hot water discharged from the biomass reformer is connected to the first pipe upstream from the hot water generator. The biomass reforming combined power plant according to claim 1.
The biomass reforming combined power plant according to claim 15 or 22, wherein the hot water generator is a hot water generator that generates the hot water having a temperature in a range of 120 ° C to 370 ° C.