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CN113669120A - A water and heat co-production co-delivery system and working method for the utilization of waste heat of heating steam - Google Patents

A water and heat co-production co-delivery system and working method for the utilization of waste heat of heating steam Download PDF

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Publication number
CN113669120A
CN113669120A CN202111017315.3A CN202111017315A CN113669120A CN 113669120 A CN113669120 A CN 113669120A CN 202111017315 A CN202111017315 A CN 202111017315A CN 113669120 A CN113669120 A CN 113669120A
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Prior art keywords
steam
heat
water
valve
pipeline
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CN202111017315.3A
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Chinese (zh)
Inventor
王妍
吕凯
马汀山
居文平
许朋江
张建元
石慧
薛朝囡
邓佳
王春燕
万小艳
温婷
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Energy Saving Technology Co Ltd
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Priority to CN202111017315.3A priority Critical patent/CN113669120A/en
Publication of CN113669120A publication Critical patent/CN113669120A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/043—Details
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/04—Using steam or condensate extracted or exhausted from steam engine plant for specific purposes other than heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K21/00—Steam engine plants not otherwise provided for
    • F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F01K9/003—Plants characterised by condensers arranged or modified to co-operate with the engines condenser cooling circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0026—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion engines, e.g. for gas turbines or for Stirling engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

本发明公开了一种供热蒸汽余热利用的水、热同产同送系统及工作方法，本发明利用汽轮机组工业蒸汽余热加热海水淡化产品水，利用高温产品水向外输送，实现对外水、热同送。本发明采用汽轮机组的抽汽在蒸汽冷却器中对产品水进行加热，降温后的抽汽送入供汽联箱中，避免了采用减温水直接对蒸汽降温所造成的能量浪费。本发明通过蒸汽冷却器将淡化产品水加热成高温产品水并对外送出，实现了电厂对外水、热同送。与现有的水、热分送系统相比，简化了系统管道布置，降低管道建设和维护成本。

Figure 202111017315

The invention discloses a water and heat co-production and co-delivery system and a working method for utilizing the waste heat of heating steam. The invention utilizes the waste heat of industrial steam of a steam turbine to heat seawater desalination product water, and utilizes the high-temperature product water to be transported to the outside, so as to realize external water, Hot delivery. The invention uses the extraction steam of the steam turbine unit to heat the product water in the steam cooler, and the cooled extraction steam is sent to the steam supply header, thereby avoiding energy waste caused by using desuperheating water to directly cool the steam. The invention heats the desalinated product water into high-temperature product water through a steam cooler and sends it to the outside, so that the power plant can send water and heat to the outside at the same time. Compared with the existing water and heat distribution system, the system piping layout is simplified, and the pipeline construction and maintenance costs are reduced.

Figure 202111017315

Description

Water and heat co-production and co-delivery system utilizing waste heat of heating steam and working method
Technical Field
The invention belongs to the field of heat supply and seawater application, and particularly relates to a water and heat co-production and co-delivery system utilizing waste heat of heat supply steam and a working method.
Background
The centralized heating is an organization mode of energy regional production for building a centralized heat source in an industrial production area and an area where urban residents gather and providing production and living heat for enterprises and residents in the area and around the area. The centralized heat supply can save fuel, is easy to be large-sized and mechanized, and can also solve the problems of smoke pollution, ash and slag fuel stacking and the like in a centralized manner, so the system has obvious economic, environmental and social benefits, and is one of the important infrastructures for modern town construction at present.
However, the coverage rate of central heating in China is still at a lower level at present, a central heating system is built only in main towns of northern provinces, and the southern cities and towns and vast rural areas in China basically have no central heating facilities and can only heat by independent heating modes such as a natural gas furnace, an air conditioner, an electric furnace, honeycomb briquette and the like. The urban central heating coverage rate of developed countries such as Finland and Denmark is up to 90%, and the national average level is over 60%. The development of the house and land industry in the future, the improvement of the urbanization rate, the removal of small regional boilers, the construction and the transformation of pipe networks in old urban areas and the like create huge and continuous demands for the central heating market, and the central heating industry in China has very wide development prospects.
On the other hand, with the rapid development of power generation by clean energy such as wind and light, thermal power generating units are gradually shifting from a main position of power supply to a bottom position of power supply in a power system. In order to improve the profitability and the survival competitive power of a power plant, a thermal power generating unit needs to transform from single electric energy supply to an electricity, heat, steam, cold, water and other comprehensive energy supply base, and the diversity of externally supplied products is enriched. For a coastal power plant, seawater desalination and power generation thermodynamic cycle are combined, and the steam required by seawater desalination is provided by using the exhaust steam of the power plant, so that the seawater desalination cost can be greatly reduced, and the profit of the power plant is improved.
The pressure and temperature requirements of an industrial extraction steam source of a coal-fired unit and a heat user cannot be completely matched, and the steam source is usually subjected to temperature reduction and pressure reduction to be suitable parameters and then is supplied out, so that the great waste of steam energy is caused.
Disclosure of Invention
The invention aims to overcome the defects and provides a water and heat co-production and co-delivery system and a working method for utilizing the waste heat of heating steam, so that the co-delivery of external water and heat is realized, and the energy waste is reduced.
In order to achieve the purpose, the water and heat cogeneration and delivery system utilizing the waste heat of the heating steam comprises a boiler, wherein a steam outlet of the boiler is connected with a steam turbine unit through a pipeline, the steam turbine unit is connected with a first generator, a steam exhaust outlet of the steam turbine unit is connected with a condenser and a multi-effect distillation seawater desalination device through a pipeline, the condenser is cooled by seawater, a seawater outlet of the condenser is connected with the multi-effect distillation seawater desalination device through a pipeline, the multi-effect distillation seawater desalination device is used for separating seawater to generate strong brine and product water, a product water outlet of the multi-effect distillation seawater desalination device is connected with a steam cooler and a delivery pipeline, a steam extraction outlet of the steam turbine unit is connected with the steam cooler through a pipeline, a high-temperature product water outlet of the steam cooler is connected with the delivery pipeline, the delivery pipeline is connected with a user side, and a temperature-reducing steam extraction outlet of the steam cooler is connected with a steam supply header through a pipeline, the extracted steam of the steam turbine set is mixed with the desuperheating water and then sent into the steam supply header.
A first valve is arranged on a connecting pipeline between the steam outlet of the steam turbine set and the multi-effect distilled seawater desalination device;
and a second valve is arranged on a connecting pipeline between the seawater outlet of the condenser and the multi-effect distilled seawater desalination device.
A third valve is arranged on a connecting pipeline of the multi-effect distilled seawater desalination device and the steam cooler;
and a fourth valve is arranged on a connecting pipeline of the multi-effect distilled seawater desalting device and the conveying pipeline.
A fifth valve is arranged on a connecting pipeline between the steam extraction outlet of the steam turbine set and the steam cooler;
a sixth valve is arranged on a connecting pipeline between the steam extraction outlet of the steam turbine set and the steam supply header;
and a seventh valve is arranged on a connecting pipeline between the steam outlet of the steam cooler and the steam supply header.
The user side comprises a heat exchange device, the heat exchange device is connected with the conveying pipeline, the heat exchange device is used for exchanging heat between high-temperature product water sent by the conveying pipeline and urban heat supply network return water, heat is transferred to the heat supply network water, and the high-temperature product water after heat exchange becomes normal-temperature product water and is supplied to a water plant.
An eighth valve is arranged on a connecting pipeline of the conveying pipeline and the heat exchange device;
and a ninth valve is arranged on a connecting pipeline between the conveying pipeline and the water plant.
The heat-insulating layer is arranged outside the conveying pipeline.
And the condensed water of the multi-effect distilled seawater desalination device enters a condensed water system.
A working method of a water and heat cogeneration and delivery system for utilizing waste heat of heating steam comprises the following steps:
when the seawater desalination device is started, partial temperature-rising seawater at a seawater outlet of the condenser is used as raw seawater to enter the multi-effect seawater distillation desalination device, partial exhaust steam of the steam turbine unit is used as a driving heat source to enter the multi-effect seawater distillation desalination device, and after the multi-stage distillation of the raw seawater and the exhaust steam is completed in the multi-effect seawater distillation desalination device, the seawater is separated to generate strong brine and product water;
when the unit supplies heat to the outside simultaneously, the extracted steam of the steam turbine unit enters a steam cooler to heat product water, the extracted steam after heat exchange enters a steam supply header, and high-temperature product water at the outlet of the steam cooler enters a conveying pipeline and is conveyed to a user side; on the user side, the high-temperature product water exchanges heat with the urban heat supply network backwater in the heat exchange device, heat is transferred to the heat supply network water to become normal-temperature product water, and then the normal-temperature product water is supplied to a water plant or other fresh water users.
When the unit does not supply heat to the outside, the product water at the outlet of the multi-effect distilled seawater desalination device is conveyed into a conveying pipeline to be conveyed to a user side. On the consumer side, the product water is delivered directly to a water plant or other fresh water consumer.
When the seawater desalination device is started, opening a first valve and a second valve;
when the unit supplies heat to the outside at the same time, opening a third valve, a fifth valve, a seventh valve and an eighth valve, and closing a sixth valve, a fourth valve 13 and a ninth valve;
when the unit does not supply heat to the outside, the third valve, the fifth valve, the seventh valve and the eighth valve are closed, and the sixth valve, the fourth valve 13 and the ninth valve are opened.
Compared with the prior art, the invention utilizes the waste heat of the industrial steam of the steam turbine set to heat the seawater desalination product water, and utilizes the high-temperature product water to convey outwards, thereby realizing the simultaneous delivery of the external water and the heat. The invention adopts the extraction steam of the steam turbine set to heat the product water in the steam cooler, and the extracted steam after temperature reduction is sent into the steam supply header, thereby avoiding energy waste caused by directly reducing the temperature of the steam by using the temperature reduction water. The invention heats the desalted product water into high-temperature product water through the steam cooler and sends the high-temperature product water out, thereby realizing the simultaneous delivery of external water and heat by the power plant. Compared with the existing water and heat distribution system, the system simplifies the pipeline arrangement of the system and reduces the pipeline construction and maintenance cost.
Drawings
FIG. 1 is a system diagram of the present invention;
the system comprises a boiler 1, a boiler 2, a steam turbine unit 3, a generator 4, a condenser 5, a steam supply header 6, a multi-effect distillation seawater desalination device 7, a steam cooler 8, a conveying pipeline 9, a heat exchange device 10, a first valve 11, a second valve 12, a third valve 13, a fourth valve 14, a fifth valve 15, a sixth valve 16, a seventh valve 17, an eighth valve 18 and a ninth valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a water and heat cogeneration and delivery system utilizing waste heat of heat supply steam comprises a boiler 1, a steam outlet of the boiler 1 is connected with a steam turbine unit 2 through a pipeline, the steam turbine unit 2 is connected with a first generator 3, a steam exhaust outlet of the steam turbine unit 2 is connected with a condenser 4 and a multi-effect distilled seawater desalination device 6 through a pipeline, the condenser 4 is cooled by seawater, a seawater outlet of the condenser 4 is connected with the multi-effect distilled seawater desalination device 6 through a pipeline, the multi-effect distilled seawater desalination device 6 is used for separating seawater to generate strong brine and product water, a product water outlet of the multi-effect distilled seawater desalination device 6 is connected with a steam cooler 7 and a delivery pipeline 8, a steam extraction outlet of the steam turbine unit 2 is connected with the steam cooler 7 through a pipeline, a high-temperature product water outlet of the steam cooler 7 is connected with the delivery pipeline 8 through a pipeline, and the delivery pipeline 8 is connected with a user side, the temperature-reducing steam extraction outlet of the steam cooler 7 is connected with the steam supply header 5 through a pipeline, and the extracted steam of the steam turbine set 2 is mixed with the temperature-reducing water and then is sent into the steam supply header 5. The outside of the conveying pipeline 8 is provided with an insulating layer to reduce the heat loss of the high-temperature product water in the conveying process.
A first valve 10 is arranged on a connecting pipeline between the steam outlet of the steam turbine unit 2 and the multi-effect distilled seawater desalination device 6; a second valve 11 is arranged on a connecting pipeline between the seawater outlet of the condenser 4 and the multi-effect distilled seawater desalination device 6. A third valve 12 is arranged on a connecting pipeline between the multi-effect distilled seawater desalination device 6 and the steam cooler 7; a fourth valve 13 is arranged on a connecting pipeline of the multi-effect distilled seawater desalination device 6 and the conveying pipeline 8. A fifth valve 14 is arranged on a connecting pipeline between the steam extraction outlet of the steam turbine unit 2 and the steam cooler 7; a sixth valve 15 is arranged on a connecting pipeline between the steam extraction outlet of the steam turbine set 2 and the steam supply header 5; a seventh valve 16 is arranged on a connecting pipeline of the steam cooler 7 and the steam supply header 5.
The user side includes heat transfer device 9, and heat transfer device 9 connects pipeline 8, and heat transfer device 9 is used for exchanging heat with the high temperature product water that pipeline 8 sent and city heat supply network return water, gives the heat supply network water with heat transfer, and the high temperature product water after the heat transfer becomes normal atmospheric temperature product water, supplies with the water works. An eighth valve 17 is arranged on a connecting pipeline of the conveying pipeline 8 and the heat exchange device 9; a ninth valve 18 is arranged on a connecting pipeline between the conveying pipeline 8 and the water plant.
And the condensed water of the multi-effect distilled seawater desalination device 6 enters a condensed water system.
A working method of a water and heat cogeneration and delivery system for utilizing waste heat of heating steam comprises the following steps:
steam at the outlet of the boiler 1 enters a steam turbine set 2 to do work by expansion to drive a first generator 3 to generate power, and exhaust steam of the steam turbine set 2 enters a condenser 4 to be condensed and then returns to a set condensed water system. When the extracted steam of the steam turbine set and the desuperheating water are mixed to reach the external supply temperature, the mixture enters the steam supply header 5 through the sixth valve 15 and is then supplied out through an external steam supply pipeline.
When the seawater desalination device is started, the first valve 10 and the second valve 11 are opened, part of the heated seawater at the cooling water outlet of the condenser 4 is used as raw seawater to enter the multi-effect distillation seawater desalination device 6, part of exhaust steam of the turbine unit 2 is used as a driving heat source to enter the multi-effect distillation seawater desalination device 6, after multi-stage distillation of the raw seawater and the exhaust steam is completed in the multi-effect distillation seawater desalination device 6, the exhaust steam is condensed to release heat and returns to the outlet of the condenser 4, and the seawater is separated to generate strong brine and product water.
When the unit supplies heat to the outside simultaneously, a third valve 12, a fifth valve 14, a seventh valve 16 and an eighth valve 17 are opened, a sixth valve 15, a fourth valve 13 and a ninth valve 18 are closed, the extracted steam of the steam turbine unit 2 enters a steam cooler 7 to heat product water, the extracted steam after heat exchange enters a steam supply header 5, and high-temperature product water at the outlet of the steam cooler 7 enters a conveying pipeline 8 to be conveyed to a user side; on the user side, the high-temperature product water exchanges heat with the urban heat supply network backwater in the heat exchange device 9, heat is transferred to the heat supply network water to become normal-temperature product water, and then the normal-temperature product water is supplied to a water plant or other fresh water users.
When the unit does not supply heat to the outside, the third valve 12, the fifth valve 14, the seventh valve 16 and the eighth valve 17 are closed, the sixth valve 15, the fourth valve 13 and the ninth valve 18 are opened, and the product water at the outlet of the multi-effect distilled seawater desalination device 6 is sent into the conveying pipeline 8 to be conveyed to the user side. On the consumer side, the product water is delivered to a water plant or other fresh water consumer via a ninth valve 18. The extracted steam of the unit enters the steam supply header 5 through the sixth valve 15 after being cooled by the desuperheating water, and then is supplied out through an external steam supply pipeline.

Claims (10)

1.一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，包括锅炉(1)，锅炉(1)的蒸汽出口通过管路连接汽轮机组(2)，汽轮机组(2)连接第一发电机(3)，汽轮机组(2)的排汽出口通过管路连接凝汽器(4)和多效蒸馏海水淡化装置(6)，凝汽器(4)采用海水冷却，凝汽器(4)的海水出口处通过管路连接多效蒸馏海水淡化装置(6)，多效蒸馏海水淡化装置(6)用于将海水分离生成浓盐水及产品水，多效蒸馏海水淡化装置(6)的产品水出口连接蒸汽冷却器(7)和输送管道(8)，汽轮机组(2)的抽汽出口通过管路连接蒸汽冷却器(7)，蒸汽冷却器(7)的高温产品水出口通过管路连接输送管道(8)，输送管道(8)连接用户侧，蒸汽冷却器(7)的减温抽汽出口通过管路连接供汽联箱(5)，汽轮机组(2)的抽汽与减温水混合后送入供汽联箱(5)。1. a water, heat co-production and co-delivery system for heat-supplying steam waste heat utilization, it is characterized in that, comprise boiler (1), and the steam outlet of boiler (1) connects steam turbine unit (2) by pipeline, steam turbine unit (2) ) is connected to the first generator (3), the exhaust steam outlet of the steam turbine unit (2) is connected to the condenser (4) and the multi-effect distillation seawater desalination device (6) through a pipeline, and the condenser (4) is cooled by seawater, The seawater outlet of the condenser (4) is connected to a multi-effect distillation seawater desalination device (6) through a pipeline, and the multi-effect distillation seawater desalination device (6) is used for separating seawater to generate concentrated brine and product water, and the multi-effect distillation seawater desalination device (6) The product water outlet of the device (6) is connected to the steam cooler (7) and the conveying pipeline (8), and the extraction steam outlet of the steam turbine unit (2) is connected to the steam cooler (7) through a pipeline. The product water outlet is connected to the conveying pipe (8) through a pipeline, the conveying pipeline (8) is connected to the user side, and the desuperheating extraction steam outlet of the steam cooler (7) is connected to the steam supply header (5) and the steam turbine unit (2) through a pipeline. ) and the desuperheating water are mixed and sent to the steam supply header (5). 2.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，汽轮机组(2)排汽出口与多效蒸馏海水淡化装置(6)的连接管路上设置有第一阀门(10)；2. a kind of water, heat co-production and co-delivery system for heat-supplying steam waste heat utilization according to claim 1, is characterized in that, the connection of steam turbine unit (2) exhaust outlet and multi-effect distillation seawater desalination device (6) A first valve (10) is arranged on the pipeline; 凝汽器(4)的海水出口与多效蒸馏海水淡化装置(6)的连接管路上设置有第二阀门(11)。A second valve (11) is arranged on the connection pipeline between the seawater outlet of the condenser (4) and the multi-effect distillation seawater desalination device (6). 3.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，多效蒸馏海水淡化装置(6)与蒸汽冷却器(7)的连接管路上设置有第三阀门(12)；3. a kind of water, heat co-production and co-delivery system for heat-supplying steam waste heat utilization according to claim 1, is characterized in that, on the connecting pipeline of multi-effect distillation seawater desalination device (6) and steam cooler (7) A third valve (12) is provided; 多效蒸馏海水淡化装置(6)与输送管道(8)的连接管路上设置有第四阀门(13)。A fourth valve (13) is arranged on the connecting pipeline between the multi-effect distillation seawater desalination device (6) and the conveying pipeline (8). 4.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，汽轮机组(2)抽汽出口与蒸汽冷却器(7)的连接管路上设置有第五阀门(14)；4. A kind of water and heat co-production and co-delivery system for heat-supplying steam waste heat utilization according to claim 1, is characterized in that, the connection pipeline of steam extraction outlet of steam turbine unit (2) and steam cooler (7) is provided with There is a fifth valve (14); 汽轮机组(2)抽汽出口与供汽联箱(5)的连接管路上设置有第六阀门(15)；A sixth valve (15) is provided on the connection pipeline between the steam extraction outlet of the steam turbine unit (2) and the steam supply header (5); 蒸汽冷却器(7)蒸汽出口与供汽联箱(5)的连接管路上设置有第七阀门(16)。A seventh valve (16) is arranged on the connection pipeline between the steam outlet of the steam cooler (7) and the steam supply header (5). 5.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，用户侧包括换热装置(9)，换热装置(9)连接输送管道(8)，换热装置(9)用于将输送管道(8)送来的高温产品水与城市热网回水进行换热，将热量传递给热网水，换热后的高温产品水成为常温产品水，供给水厂。5. The water and heat co-production and co-delivery system according to claim 1, characterized in that, the user side comprises a heat exchange device (9), and the heat exchange device (9) is connected to a conveying pipeline ( 8), the heat exchange device (9) is used to exchange heat between the high-temperature product water sent by the conveying pipeline (8) and the return water of the urban heat network, and transfer the heat to the heat network water, and the high-temperature product water after heat exchange becomes normal temperature. The product water is supplied to the water plant. 6.根据权利要求5所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，输送管道(8)与换热装置(9)的连接管路上设置有第八阀门(17)；6. A water and heat co-production and co-delivery system for heat-supplying steam waste heat utilization according to claim 5, characterized in that, the connection pipeline between the conveying pipeline (8) and the heat exchange device (9) is provided with an eighth valve (17); 输送管道(8)与水厂的连接管路上设置有第九阀门(18)。A ninth valve (18) is arranged on the connecting pipeline between the conveying pipeline (8) and the water plant. 7.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，输送管道(8)外设置有保温层。7 . The water and heat co-production and co-feeding system according to claim 1 , wherein a heat insulating layer is provided outside the conveying pipe ( 8 ). 8 . 8.根据权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统，其特征在于，多效蒸馏海水淡化装置(6)的凝结水进入汽轮机组凝结水系统。8 . The water and heat co-production and co-feeding system for the utilization of waste heat of heating steam according to claim 1 , wherein the condensed water of the multi-effect distillation seawater desalination device (6) enters the condensed water system of the steam turbine unit. 9 . 9.权利要求1所述的一种供热蒸汽余热利用的水、热同产同送系统的工作方法，其特征在于，包括以下步骤：9. the working method of the water, heat co-production co-delivery system of a kind of heat-supplying steam waste heat utilization according to claim 1, is characterized in that, comprises the following steps: 当启动海水淡化装置时，凝汽器(4)冷却水出口处的部分升温海水作为原料海水进入多效蒸馏海水淡化装置(6)中，汽轮机组(2)的部分排汽作为驱动热源进入多效蒸馏海水淡化装置(6)中，原料海水及排汽在多效蒸馏海水淡化装置(6)中完成多级蒸馏后，海水被分离生成浓盐水及产品水；When the seawater desalination device is started, part of the heated seawater at the cooling water outlet of the condenser (4) enters the multi-effect distillation seawater desalination device (6) as raw seawater, and part of the exhaust steam from the steam turbine unit (2) is used as a driving heat source to enter the multi-effect distillation seawater desalination device (6). In the high-efficiency distillation seawater desalination device (6), after the multi-stage distillation of the raw seawater and the exhaust steam is completed in the multi-effect distillation seawater desalination device (6), the seawater is separated to generate concentrated brine and product water; 当机组同时对外供热时，汽轮机组(2)的抽汽进入蒸汽冷却器(7)中加热产品水，换热后的抽汽进入供汽联箱(5)中，蒸汽冷却器(7)出口高温产品水进入输送管道(8)中输送至用户侧；When the unit supplies heat to the outside at the same time, the extraction steam of the steam turbine unit (2) enters the steam cooler (7) to heat the product water, and the extraction steam after heat exchange enters the steam supply header (5), and the steam cooler (7) The outlet high-temperature product water enters the conveying pipeline (8) and is conveyed to the user side; 当机组不对外供热时，多效蒸馏海水淡化装置(6)出口产品水送入输送管道(8)输送至用户侧。When the unit does not supply heat to the outside, the product water exported from the multi-effect distillation seawater desalination device (6) is sent into the conveying pipeline (8) to be conveyed to the user side. 10.根据权利要求9所述的一种供热蒸汽余热利用的水、热同产同送系统的工作方法，其特征在于，当启动海水淡化装置时，打开第一阀门(10)和第二阀门(11)；10. The working method of a water and heat co-production and co-delivery system for heating steam waste heat utilization according to claim 9, characterized in that, when starting the seawater desalination device, the first valve (10) and the second valve are opened. valve (11); 当机组同时对外供热时，打开第三阀门(12)、第五阀门(14)、第七阀门(16)和第八阀门(17)，关闭第六阀门(15)、第四阀门13和第九阀门(18)；When the unit supplies heat to the outside at the same time, open the third valve (12), the fifth valve (14), the seventh valve (16) and the eighth valve (17), close the sixth valve (15), the fourth valve 13 and Ninth valve (18); 当机组不对外供热时，关闭第三阀门(12)、第五阀门(14)、第七阀门(16)和第八阀门(17)，打开第六阀门(15)、第四阀门13和第九阀门(18)。When the unit does not supply heat to the outside, close the third valve (12), the fifth valve (14), the seventh valve (16) and the eighth valve (17), open the sixth valve (15), the fourth valve 13 and Ninth valve (18).
CN202111017315.3A 2021-08-31 2021-08-31 A water and heat co-production co-delivery system and working method for the utilization of waste heat of heating steam Pending CN113669120A (en)

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