CN112228175A - Heating system for realizing activation of purified molecular sieve by utilizing low-grade steam of thermal power generating unit - Google Patents

Heating system for realizing activation of purified molecular sieve by utilizing low-grade steam of thermal power generating unit Download PDF

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Publication number
CN112228175A
CN112228175A CN202011164601.8A CN202011164601A CN112228175A CN 112228175 A CN112228175 A CN 112228175A CN 202011164601 A CN202011164601 A CN 202011164601A CN 112228175 A CN112228175 A CN 112228175A
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China
Prior art keywords
molecular sieve
steam
air
outlet
power generating
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Pending
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CN202011164601.8A
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Chinese (zh)
Inventor
吕凯
马汀山
居文平
王妍
张建元
黄嘉驷
林轶
王春燕
刘学亮
王东晔
郑天帅
杨利
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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 CN202011164601.8A priority Critical patent/CN112228175A/en
Publication of CN112228175A publication Critical patent/CN112228175A/en
Pending legal-status Critical Current

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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
    • 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
    • F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01B23/10—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
    • 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
    • F01K1/00—Steam accumulators
    • F01K1/04—Steam accumulators for storing steam in a liquid, e.g. Ruth's type
    • 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
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/008—Use of steam accumulators of the Ruth type for storing steam in water; Regulating thereof
    • 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
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/14—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
    • 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
    • F01K7/16—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 only of turbine type
    • F01K7/22—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 only of turbine type the turbines having inter-stage steam 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention discloses a heating system for realizing activation of a purified molecular sieve by utilizing low-grade steam of a thermal power generating unit, which comprises a coal-fired power generating unit and an air purified molecular sieve activation system; part of exhaust steam of a pressure cylinder in the coal-fired power generating unit is used as a heat source and enters an air purification molecular sieve activation system; the air purification molecular sieve activation system is connected with the liquid compressed air energy storage system and is used for removing moisture, carbon dioxide and other impurities in the air; and the outlet of the liquid compressed air energy storage system is connected with the liquid compressed air energy release system. The invention adopts low-quality steam of a thermal power generating unit to realize the adsorption capacity of the air purification molecular sieve, and air enters the air purification molecular sieve after flowing through the finned heat exchanger and being heated so as to be activated. Compared with the traditional electric heating mode, the mode that extraction steam which does work at the steam turbine generator unit is used as a heat source is adopted, the operation cost is greatly reduced, the electric output of the steam turbine generator unit can be reduced to a certain degree while the output of a boiler is unchanged, and the deep peak regulation service of the thermal power unit is facilitated.

Description

Heating system for realizing activation of purified molecular sieve by utilizing low-grade steam of thermal power generating unit
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of power transmission, and particularly relates to a heating system for realizing activation of a purified molecular sieve by using low-grade steam of a thermal power generating unit.
[ background of the invention ]
By 2019, the cumulative installed capacities of photovoltaic power and wind power respectively reach 2.05 hundred million kilowatts and 2.1 hundred million kilowatts, and account for 10.2 percent and 10.4 percent of the total installed capacity (20.1 hundred million kilowatts); the annual total power generation amount respectively reaches 2243 and 4057 hundred million kilowatts, which account for 3 percent and 5.5 percent of the annual total power generation amount (73253 hundred million kilowatts), and the new energy power is rapidly developed in the future, so that the thermal power generating unit is required to further excavate the peak regulation potential on the basis of the current. The renewable energy source electric energy with the characteristics of volatility and intermittence is connected to the power grid on a large scale, and higher requirements are provided for peak clipping, valley filling, safety and stability of the power grid. The construction of large-scale energy storage devices improves the operation flexibility and safety of the power system, and is an effective way for solving the problem of high-proportion consumption of new energy.
At present, the energy storage technology mainly comprises pumped storage, compressed air storage and electrochemical storage. The pumped storage technology is mature, the efficiency is high, but the problems of geographical position limitation and the like exist, and the large-scale popularization is difficult; the electrochemical battery energy storage technology has the advantages of fast response, small volume and short construction period, but has the defects of short overall service life, large industrial pollution and the like. The liquid compressed air energy storage technology has the characteristics of long service life, small environmental pollution, low operation and maintenance cost and the like, and has large-scale popularization and application potential.
The air purification molecular sieve is one of key equipment of a liquid compressed air energy storage system coupled with a thermal power generating unit, is used for adsorbing moisture, carbon dioxide, acetylene and the like in purified air, is vertically arranged, and mainly comprises a molecular sieve adsorption tank (one transportation and one standby), heating equipment, related auxiliary pipelines, valves and the like. In the energy storage stage, high-pressure air enters a molecular sieve for adsorption; in the energy release stage, the molecular sieve releases pressure to normal pressure, the air is subjected to high-temperature air hot blowing treatment by the electric heater, the adsorption capacity in the adsorption tank is reduced, and therefore impurities such as water drops, carbon dioxide and acetylene adsorbed on the molecular sieve are released and discharged to the atmosphere along with hot blowing airflow and subsequent cold blowing airflow, and the purified molecular sieve is activated to be used in the next energy storage stage.
At present, the most common 'activation' mode is an electric heating mode, namely, a set of electric heating equipment is arranged, and air enters the molecular sieve hot blowing treatment after being heated by the electric heating equipment. The mode adopts electric power as an 'activation' heat source, and the system is simple, but has the defects of high energy consumption and the like.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a heating system for realizing the activation of a purified molecular sieve by using low-grade steam of a thermal power generating unit.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
utilize low-grade steam of thermal power generating unit to realize purification molecular sieve activation's heating system includes:
part of exhaust steam of a pressure cylinder in the coal-fired power generator unit is used as a heat source and enters an air purification molecular sieve activation system;
the air purification molecular sieve activation system is connected with the liquid compressed air energy storage system and is used for removing moisture, carbon dioxide and other impurities in the air; and the outlet of the liquid compressed air energy storage system is connected with the liquid compressed air energy release system.
The invention further improves the following steps:
the coal-fired power generating set comprises a boiler, wherein a new steam outlet of the boiler is connected with a steam inlet of a high-pressure cylinder, a steam outlet of the high-pressure cylinder is connected with an inlet of a reheater of the boiler, an outlet of the reheater of the boiler is connected with a steam inlet of a medium-pressure cylinder, the steam outlet of the medium-pressure cylinder is divided into two paths, one path is connected with a hot side inlet of a steam-gas heat exchanger of an air purification molecular sieve activation system through a first valve group, the other path is connected with a steam inlet of a low-pressure cylinder, and the steam outlet of the low-pressure cylinder is sequentially connected with a condenser, a condensate pump, a low-pressure heater group, a water; the outlet of the high-pressure heater group is connected with the boiler; the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder are coaxially connected and drive the generator to generate electricity together.
The air purification molecular sieve activation system comprises a steam-gas heat exchanger and an air purification molecular sieve; the hot side outlet of the steam-gas heat exchanger is connected with a condenser through a drain pump; the inlet of the air purification molecular sieve is connected with an air cooler of a liquid compressed air energy storage system, and the outlet of the air purification molecular sieve is connected with a refrigeration expander; the heat source of the air purification molecular sieve is from a steam-gas heat exchanger.
And one part of the exhaust gas of the liquid compressed air energy release system is discharged to the atmosphere, the other part of the exhaust gas enters a fan, an outlet of the fan is connected with a cold side inlet of the steam-gas heat exchanger through a cold air pipe, and a cold side outlet of the steam-gas heat exchanger is connected with the air purification molecular sieve through a hot air pipe to supply heat for the air purification molecular sieve.
And a second valve group is also arranged on a pipeline between the drain pump and the condenser.
The liquid compressed air energy storage system comprises an air compressor, an outlet of the air compressor is connected with an air cooler, an outlet of the air cooler is connected with an air purification molecular sieve activation system, an outlet of the air purification molecular sieve activation system is sequentially connected with a refrigeration expansion machine and a gas-liquid separator, a liquid outlet of the gas-liquid separator is connected with an inlet of a liquefied air storage device, and an outlet of the liquefied air storage device is connected with a liquid compressed air energy release system.
The liquid compressed air energy release system comprises a booster pump, wherein the inlet of the booster pump is connected with the outlet of the liquefied air storage device, and the outlet of the booster pump is sequentially connected with an air heater and an air expansion generator.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts low-quality steam of a thermal power generating unit to realize the adsorption capacity of the air purification molecular sieve, a fan and an air duct are arranged to establish a forced mechanical ventilation system, a finned heat exchanger is arranged, steam at a certain position of a steam-water circulation system of the thermal power generating unit is introduced into the duct, and air enters the air purification molecular sieve after flowing through the finned heat exchanger and being heated so as to be activated. Compared with the traditional electric heating mode, the mode that extraction steam which does work at the steam turbine generator unit is used as a heat source is adopted, the operation cost is greatly reduced, the electric output of the steam turbine generator unit can be reduced to a certain degree while the output of a boiler is unchanged, and the deep peak regulation service of the thermal power unit is facilitated.
[ description of the drawings ]
In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of the system of the present invention.
The system comprises a boiler 1, a high-pressure cylinder 2, a medium-pressure cylinder 3, a low-pressure cylinder 4, a generator 5, a condenser 6, a condensate pump 7, a low-pressure heater group 8, a water feed pump 9, a high-pressure heater group 10, a valve group 11, a fan 12, a steam-gas heat exchanger 13, a drain pump 14, an air compressor 15, an air cooler 16, an air purification molecular sieve 17, a refrigeration expander 18, a gas-liquid separator 19, a liquefied air storage device 20, a liquefied air booster pump 21, an air heater 22, an air expansion generator 23, a second valve group 24, a cold air pipe 25 and a hot air pipe 26.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the heating system for activating the purified molecular sieve by using the low-grade steam of the thermal power generating unit comprises a steam-water thermal circulation system of the coal-fired power generating unit, a liquid compressed air energy storage system, a liquid compressed air energy release system and an air purified molecular sieve activation system.
The steam-water thermal circulation system of the coal-fired power generating set comprises a coal-fired power generating set, wherein part of exhausted steam of a pressure cylinder 3 in the coal-fired power generating set is used as a heat source to enter an air purification molecular sieve activation system;
the coal-fired generating set comprises a boiler 1, wherein a new steam outlet of the boiler 1 is connected with a steam inlet of a high-pressure cylinder 2, a steam exhaust port of the high-pressure cylinder 2 is connected with a reheater inlet of the boiler 1, a reheater outlet of the boiler 1 is connected with a steam inlet of a medium-pressure cylinder 3, the steam exhaust port of the medium-pressure cylinder 3 is divided into two paths, one path is connected with a hot side inlet of a steam-gas heat exchanger 13 of an air purification molecular sieve activation system through a first valve group 11, the other path is connected with a steam inlet of a low-pressure cylinder 4, and the steam exhaust of the low-pressure cylinder 4 is sequentially connected with a condenser 6, a condensate pump 7, a low-pressure heater group 8, a water feed pump group; the outlet of the high-pressure heater group 10 is connected with the boiler 1; the high pressure cylinder 2, the intermediate pressure cylinder 3 and the low pressure cylinder 4 are coaxially connected and drive a generator 5 to generate electricity together.
The air purification molecular sieve activation system is connected with the liquid compressed air energy storage system and is used for removing moisture, carbon dioxide and other impurities in the air; and the outlet of the liquid compressed air energy storage system is connected with the liquid compressed air energy release system.
The air purification molecular sieve activation system comprises a steam-gas heat exchanger 13 and an air purification molecular sieve 17; the hot side outlet of the steam-gas heat exchanger 13 is connected with the condenser 6 through a drain pump 14; the inlet of the air purification molecular sieve 17 is connected with an air cooler 16 of a liquid compressed air energy storage system, and the outlet is connected with a refrigeration expander 18; the heat source for air purification molecular sieve 17 comes from vapor-gas heat exchanger 13.
One part of the exhaust gas of the liquid compressed air energy release system is discharged to the atmosphere, the other part of the exhaust gas enters the fan 12, the outlet of the fan 12 is connected with the cold side inlet of the steam-gas heat exchanger 13 through a cold air pipe 25, and the cold side outlet of the steam-gas heat exchanger 13 is connected with the air purification molecular sieve 17 through a hot air pipe 26 to supply heat for the air purification molecular sieve. A second valve group 24 is also arranged on the pipeline between the drain pump 14 and the condenser 6.
The liquid compressed air energy storage system comprises an air compressor 15, an outlet of the air compressor 15 is connected with an air cooler 16, an outlet of the air cooler 16 is connected with an air purification molecular sieve activation system, an outlet of the air purification molecular sieve activation system is sequentially connected with a refrigeration expander 18 and a gas-liquid separator 19, a liquid outlet of the gas-liquid separator 19 is connected with an inlet of a liquefied air storage device 20, and an outlet of the liquefied air storage device 20 is connected with a liquid compressed air energy release system.
The liquid compressed air energy release system comprises a booster pump 21, wherein the inlet of the booster pump 21 is connected with the outlet of the liquefied air storage device 20, and the outlet of the booster pump 21 is sequentially connected with an air heater 22 and an air expansion generator 23.
The working process of the invention is as follows:
the new steam at the outlet of the boiler 1 sequentially passes through a high-pressure cylinder 2 of the steam turbine to do work and then returns to a reheater of the boiler 1 to be heated for the second time, then enters an intermediate-pressure cylinder 3 and a low-pressure cylinder 4 to do work to drive a generator 5 to generate power, the exhaust steam of the low-pressure cylinder 4 enters a condenser 6 to be condensed, and then enters the boiler 1 to absorb heat after sequentially passing through a condensate pump 7, a low-pressure heater group 8, a water feed pump group 9 and a high-pressure heater group 10, so that the steam.
The energy storage process of the system is as follows: air is pressurized by an air compressor 15 and then enters an air cooler 16 for cooling, after cooling, the air enters an air purification molecular sieve 17 for removing impurities such as moisture, carbon dioxide and the like and then enters a refrigeration expander 18 for realizing deep cooling, liquid and gas separation of the air is realized in a gas-liquid separator 19, and the liquid enters a liquefied air storage device 20, which is the process of liquefying, compressing and storing energy of the air. The first valve group 11 and the second valve group 24 are closed at this time.
Energy release process of the system: liquefied air at the outlet of the liquefied air storage device 20 is pressurized by a booster pump 21, then is heated by an air heater 22 and then enters an air expansion generator 23 to do work, the exhaust is divided into two paths, one path is exhausted into the atmospheric environment, and the other path is taken as pure air and enters an air purification molecular sieve activation system.
Air purification molecular sieve activation system: a part of the exhaust air of the air expansion generator 23 enters the fan 12 through an air pipe, is pressurized, enters the steam-gas heat exchanger 13 through the cold air pipe 25, absorbs heat, enters the air purification molecular sieve 17, is subjected to hot blowing treatment, and is exhausted to the atmospheric environment. The steam-gas heat exchanger 13 is a tubular heat exchange structure adopting fins to enhance heat exchange, high-temperature steam is introduced into the tube, and cold air passes through the heat exchange tube bundle to realize temperature rise. The first valve group 11 and the second valve group 24 are opened, the steam discharged by the intermediate pressure cylinder 3 is used as a heat source to enter the steam-gas heat exchanger 13, and condensed water after temperature reduction and condensation is pressurized by the drain pump 14 and then returns to the condenser 6, so that the steam-water quality balance is realized.
The low-quality steam of the thermal power generating unit is used as a heat source to recover the adsorption capacity of the air purification molecular sieve, the energy conversion link of a generator in an electric heating mode is eliminated, and the operation cost is greatly reduced.
The principle of the invention is as follows:
the invention provides a heating system for realizing activation of a purified molecular sieve by utilizing low-grade steam of a thermal power generating unit. Compared with the traditional electric heating mode, the mode that extraction steam which does work at the steam turbine generator unit is used as a heat source is adopted, the operation cost is greatly reduced, the electric output of the steam turbine generator unit can be reduced to a certain degree while the output of a boiler is unchanged, and the deep peak regulation service of the thermal power unit is facilitated.
The 'activation' system of the air purification molecular sieve requires that the temperature of hot air is not lower than 170 ℃. Taking a 10MW liquid compressed air energy storage system as an example, the air quantity is 21000Nm3The inlet air temperature was about 20 ℃ and the required heat load was about 1.4 MW.
The low-quality heat source of the steam-water thermodynamic cycle of the thermal power generating unit, such as the exhaust steam of an intermediate pressure cylinder, can meet the requirement of an air purification molecular sieve activation system.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. Utilize thermal power generating unit low-grade steam to realize purification molecular sieve activation's heating system, its characterized in that includes:
part of exhaust steam of a medium pressure cylinder (3) of the coal-fired power generating unit is used as a heat source to enter an air purification molecular sieve activation system;
the air purification molecular sieve activation system is connected with the liquid compressed air energy storage system and is used for removing moisture, carbon dioxide and other impurities in the air; and the outlet of the liquid compressed air energy storage system is connected with the liquid compressed air energy release system.
2. The heating system for activating the purified molecular sieve by using the low-grade steam of the thermal power generating unit according to claim 1, the coal-fired power generating set is characterized by comprising a boiler (1), wherein a new steam outlet of the boiler (1) is connected with a steam inlet of a high-pressure cylinder (2), a steam exhaust port of the high-pressure cylinder (2) is connected with a reheater inlet of the boiler (1), a reheater outlet of the boiler (1) is connected with a steam inlet of a medium-pressure cylinder (3), the steam exhaust port of the medium-pressure cylinder (3) is divided into two paths, one path is connected with a hot side inlet of a steam-gas heat exchanger (13) of an air purification molecular sieve activation system through a first valve group (11), the other path is connected with a steam inlet of a low-pressure cylinder (4), and the steam exhaust of the low-pressure cylinder (4) is sequentially connected with a condenser (6), a condensate pump (7), a low-pressure heater group (8), a water feed pump group (9) and a high-pressure heater group; the outlet of the high-pressure heater group (10) is connected with the boiler (1); the high pressure cylinder (2), the intermediate pressure cylinder (3) and the low pressure cylinder (4) are coaxially connected and drive the generator (5) to generate electricity together.
3. The heating system for realizing activation of the purified molecular sieve by using low-grade steam of a thermal power generating unit as claimed in claim 2, wherein the air purification molecular sieve activation system comprises a steam-gas heat exchanger (13) and an air purification molecular sieve (17); the hot side outlet of the steam-gas heat exchanger (13) is connected with a condenser (6) through a drain pump (14); the inlet of the air purification molecular sieve (17) is connected with an air cooler (16) of a liquid compressed air energy storage system, and the outlet is connected with a refrigeration expander (18); the heat source of the air purification molecular sieve (17) comes from a steam-gas heat exchanger (13).
4. The heating system for realizing activation of the purified molecular sieve by using the low-grade steam of the thermal power generating unit as claimed in claim 3, wherein a part of the exhaust gas of the liquid compressed air energy release system is discharged to the atmosphere, the other part of the exhaust gas enters the fan (12), the outlet of the fan (12) is connected with the cold side inlet of the steam-gas heat exchanger (13) through a cold air pipe (25), and the cold side outlet of the steam-gas heat exchanger (13) is connected with the air purified molecular sieve (17) through a hot air pipe (26) to supply heat to the air purified molecular sieve.
5. The heating system for realizing the activation of the purified molecular sieve by utilizing the low-grade steam of the thermal power generating unit according to claim 3, wherein a second valve group (24) is further arranged on a pipeline between the drainage pump (14) and the condenser (6).
6. The heating system for realizing activation of the purified molecular sieve by using low-grade steam of a thermal power generating unit according to claim 1, wherein the liquid compressed air energy storage system comprises an air compressor (15), an outlet of the air compressor (15) is connected with an air cooler (16), an outlet of the air cooler (16) is connected with an air purification molecular sieve activation system, an outlet of the air purification molecular sieve activation system is sequentially connected with a refrigeration expander (18) and a gas-liquid separator (19), a liquid outlet of the gas-liquid separator (19) is connected with an inlet of a liquefied air storage device (20), and an outlet of the liquefied air storage device (20) is connected with a liquid compressed air energy release system.
7. The heating system for realizing activation of the purified molecular sieve by using the low-grade steam of the thermal power generating unit as claimed in claim 6, wherein the liquid compressed air energy release system comprises a booster pump (21), an inlet of the booster pump (21) is connected with an outlet of the liquefied air storage device (20), and an outlet of the booster pump (21) is connected with the air heater (22) and the air expansion generator (23) in sequence.
CN202011164601.8A 2020-10-27 2020-10-27 Heating system for realizing activation of purified molecular sieve by utilizing low-grade steam of thermal power generating unit Pending CN112228175A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113917080A (en) * 2021-10-08 2022-01-11 北京航空航天大学 Molecular sieve attenuation performance test equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113917080A (en) * 2021-10-08 2022-01-11 北京航空航天大学 Molecular sieve attenuation performance test equipment
CN113917080B (en) * 2021-10-08 2024-04-19 北京航空航天大学 Molecular sieve decay performance test equipment

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