CN112304108B - System and method for utilizing heat of blowing compressed air for combustion engine - Google Patents
System and method for utilizing heat of blowing compressed air for combustion engine Download PDFInfo
- Publication number
- CN112304108B CN112304108B CN202010990294.2A CN202010990294A CN112304108B CN 112304108 B CN112304108 B CN 112304108B CN 202010990294 A CN202010990294 A CN 202010990294A CN 112304108 B CN112304108 B CN 112304108B
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- condensed water
- gas turbine
- refrigerating unit
- lithium bromide
- bromide absorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- 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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a system and a method for utilizing heat of clean-blowing compressed air of a gas turbine, which comprises a condenser, a gas turbine blowing cooler, a lithium bromide absorption refrigerating unit and an expansion water tank, wherein the condenser is connected with the gas turbine blowing cooler; a condensed water outlet of the condenser is divided into two paths which are respectively connected with a condensed water main pipe and a condensed water bypass pipeline; the condensed water bypass pipeline is connected with a condensed water bypass electric valve, a gas turbine purging cooler and a lithium bromide absorption refrigerating unit, the lithium bromide absorption refrigerating unit is connected with an expansion water tank, and the expansion water tank is connected with a water supplementing inlet of the condenser. The invention uses the condensed water as a medium to cool the air blown by the gas turbine, recovers the heat of the blown air to heat the condensed water, and the heated condensed water enters the lithium bromide absorption refrigerating unit, and the refrigerating unit outputs certain cold energy by using the heat of the condensed water, thereby forming an energy utilization system coupled with a cold and heat source, avoiding the waste of energy and increasing the energy utilization rate of the combined cycle combined cooling heating and power unit.
Description
Technical Field
The invention relates to a system and a method for utilizing heat of compressed air blown by a gas turbine.
Background
In recent years, the gas-steam combined cycle unit has the advantages of short construction period, less environmental pollution, high energy utilization rate and the like, so that the installed capacity of the gas-steam combined cycle unit is rapidly increased, the single unit capacity is continuously increased, and the occupied proportion of the gas-steam combined cycle unit in the power generation industry is increased year by year.
In the operation process of the gas turbine, in order to prevent explosion and cool the shutdown nozzle, combustible gas in a gas pipeline which is shut down must be blown and cleaned, and the shutdown nozzle is cooled, so that a part of high-temperature compressed air is extracted from an outlet of a compressor and is used for purging a gas pipeline and a manifold after being cooled, the temperature of exhaust gas of the compressor entering a cooler can reach more than 400 ℃, and the exhaust gas is a heat source with high-quality heat, but the part of heat is not effectively utilized in the actual operation process, but is used for heating circulating cooling water, so that water and electricity are consumed, and the part of high-quality heat source is wasted. Particularly in a combined cycle combined cooling heating and power unit, a lithium bromide absorption refrigerating unit needs to input a large amount of heat, the lithium bromide unit has low requirement on a heat medium, the medium at 85 ℃ can be utilized generally, and if the heat is used for the lithium bromide unit to convert and output air-conditioning water with certain quality for users to use, the aims of changing waste into valuable, saving energy and reducing emission are achieved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a system and a method for utilizing heat of the blowing and cleaning compressed air of a combustion engine, which have the advantages of reasonable structural design, simple operation and reliable performance. For the gas-steam combined cycle unit, condensed water is used as a medium to cool the exhaust gas of a gas turbine compressor, the heat of the clean air is recovered to heat the condensed water, the heated condensed water enters a lithium bromide absorption type refrigerating unit, and the refrigerating unit outputs certain cold energy by using the heat of the condensed water, so that an energy utilization system with coupled cold and heat sources is formed, the waste of energy is avoided, and the energy utilization rate of the combined cycle combined cooling heating and power unit is improved.
The technical scheme adopted by the invention for solving the problems is as follows: a system for utilizing heat of clean-blowing compressed air of a gas turbine is characterized by comprising a condenser, a gas turbine blowing cooler, a lithium bromide absorption refrigerating unit and an expansion water tank; the condenser is characterized in that a condensed water outlet of the condenser is sequentially provided with a vacuum valve, a filter screen, a condensed water pump, a check valve and a condensed water outlet electric valve, and the outlet of the condensed water outlet electric valve is divided into two paths which are respectively connected with a condensed water main pipe and a condensed water bypass pipeline; the condensed water bypass pipeline is connected with a condensed water bypass electric valve, a gas turbine purging cooler and a lithium bromide absorption refrigerating unit, the inlet and the outlet of the gas turbine purging cooler are respectively provided with an electric valve for the inlet of the gas turbine purging cooling system and an electric valve for the outlet of the gas turbine purging cooling system, the gas turbine purging cooler is provided with a bypass, a bypass electric valve of a gas turbine purging cooling system is arranged on the bypass of the gas turbine purging cooler, the lithium bromide absorption refrigerating unit is provided with a bypass, a refrigerating unit bypass electric valve is arranged on the bypass of the lithium bromide absorption refrigerating unit, the lithium bromide absorption type refrigerating unit is connected with the expansion tank through an electric valve at the inlet of the expansion tank, an exhaust valve of the expansion tank is installed at the top of the expansion tank, and the expansion tank is connected with a water supplementing inlet of the condenser through an electric water supplementing adjusting valve of the condenser.
In order to ensure the safe and stable operation of the system, two sets of condensed water circulating systems are arranged, namely two sets of condensed water circulating systems are respectively arranged on the vacuum valve, the filter screen, the condensed water pump, the check valve and the condensed water outlet electric valve.
The working method of the combustion engine blowing compressed air heat utilization system is characterized by comprising the following steps:
condensed water in the condenser sequentially passes through a vacuum valve, a filter screen, a condensed water pump, a check valve and a condensed water outlet electric valve and then is divided into two paths, one path of the condensed water enters a waste heat boiler through a condensed water main pipe, the other path of the condensed water enters a condensed water bypass pipeline, and the condensed water bypass electric valve sequentially passes through a gas turbine purging cooling system and a lithium bromide absorption refrigerating unit;
the condensed water enters the gas turbine purging cooler through the electric valve at the inlet of the gas turbine purging cooling system to cool the hot compressed air after the gas turbine purging, and when the gas turbine purging cooler is shut down, the gas turbine purging cooler can be isolated through the electric valve at the bypass of the gas turbine purging cooling system;
after the condensed water passes through the gas turbine purging cooling system, the water temperature of the condensed water is increased more, a hot water source with certain quality is formed, and after the hot water source enters the lithium bromide absorption type refrigerating unit, the lithium bromide absorption type refrigerating unit outputs a cold water source with the equivalent quality, so that the cold and heat source coupling utilization system can be formed by utilizing the part of the cold water source; when the lithium bromide absorption refrigerating unit stops running, the lithium bromide absorption refrigerating unit can be isolated through the bypass electric valve of the refrigerating unit;
after the condensed water passes through the lithium bromide absorption refrigerating unit, the water temperature is reduced to a normal range after the heat of the condensed water is released, then the condensed water enters the expansion tank through the electric valve at the inlet of the expansion tank, and the water level of the condenser is controlled and adjusted through the electric water-supplementing adjusting valve of the condenser.
Compared with the prior art, the invention has the following advantages and effects: the system is simple to modify, the cold and heat source coupling system is simple, the heat with higher quality can be fully utilized, the resource waste is avoided, and the optimal configuration of energy resources is promoted.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: the system comprises a condenser 1, a vacuum valve 2, a filter screen 3, a condensate pump 4, a check valve 5, a condensate outlet electric valve 6, a condensate bypass electric valve 7, a gas turbine purging and cooling system bypass electric valve 8, a gas turbine purging and cooling system inlet electric valve 9, a gas turbine purging and cooling device 10, a gas turbine purging and cooling system outlet electric valve 11, a lithium bromide absorption type refrigerating unit 12, a refrigerating unit bypass electric valve 13, an expansion water tank inlet electric valve 14, an expansion water tank 15, an expansion water tank exhaust valve 16, a condenser water supplementing electric adjusting valve 17, a condensate main pipe 18 and a condensate bypass pipeline 19.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1, a system for utilizing heat of clean-blowing compressed air of a combustion engine comprises a condenser 1, a gas turbine purging cooler 10, a lithium bromide absorption refrigerating unit 12 and an expansion water tank 15; a condensed water outlet of the condenser 1 is sequentially provided with a vacuum valve 2, a filter screen 3, a condensed water pump 4, a check valve 5 and a condensed water outlet electric valve 6, and an outlet of the condensed water outlet electric valve 6 is divided into two paths which are respectively connected with a condensed water main pipe 18 and a condensed water bypass pipeline 19; the condensed water bypass electric valve 7 is connected on the condensed water bypass pipeline 19, the system comprises a gas turbine purging cooler 10 and a lithium bromide absorption type refrigerating unit 12, wherein an inlet electric valve 9 of a gas turbine purging cooling system and an outlet electric valve 11 of the gas turbine purging cooling system are respectively installed at an inlet and an outlet of the gas turbine purging cooler 10, the gas turbine purging cooler 10 is provided with a bypass, a gas turbine purging cooling system bypass electric valve 8 is installed on the bypass of the gas turbine purging cooler 10, the lithium bromide absorption type refrigerating unit 12 is provided with a bypass, a refrigerating unit bypass electric valve 13 is installed on the bypass of the lithium bromide absorption type refrigerating unit 12, the lithium bromide absorption type refrigerating unit 12 is connected with an expansion water tank 15 through an expansion water tank inlet electric valve 14, an expansion water tank exhaust valve 16 is installed at the top of the expansion water tank 15, and the expansion water tank 15 is connected with a water replenishing inlet of a condenser 1 through a condenser water replenishing electric adjusting valve 17.
In order to ensure the safe and stable operation of the system, two sets of condensed water circulating systems are arranged, namely a vacuum valve 2, a filter screen 3, a condensed water pump 4, a check valve 5 and a condensed water outlet electric valve 6 are respectively arranged.
The working method comprises the following steps:
condensed water in the condenser 1 sequentially passes through a vacuum valve 2, a filter screen 3, a condensed water pump 4, a check valve 5 and a condensed water outlet electric valve 6 and then is divided into two paths, wherein one path of condensed water enters a waste heat boiler through a condensed water main pipe 18, the other path of condensed water enters a condensed water bypass pipeline 19, and the condensed water passes through a condensed water bypass electric valve 7 and sequentially passes through a gas turbine purging and cooling system and a lithium bromide absorption refrigerating unit 12;
condensed water enters the gas turbine purging cooler 10 through the gas turbine purging cooling system inlet electric valve 9 to cool hot compressed air after gas turbine purging, and when the gas turbine purging cooler 10 is stopped, the gas turbine purging cooler 10 can be isolated through the gas turbine purging cooling system bypass electric valve 8;
after the condensed water passes through the gas turbine purging cooling system, the water temperature of the condensed water is increased more, a hot water source with certain quality is formed, and after the hot water source enters the lithium bromide absorption type refrigerating unit 12, the lithium bromide absorption type refrigerating unit 12 outputs a cold water source with the equivalent quality, so that the cold and heat source coupling utilization system can be formed by utilizing the part of the cold water source; when the lithium bromide absorption refrigerating unit 12 is stopped, the lithium bromide absorption refrigerating unit 12 can be isolated through the refrigerating unit bypass electric valve 13;
after the condensed water passes through the lithium bromide absorption refrigerating unit 12, the water temperature is reduced to a normal range after the heat of the condensed water is released, then the condensed water enters the expansion water tank 15 through the electric valve 14 at the inlet of the expansion water tank, and the water level of the condenser 1 is controlled and regulated through the electric water-supplementing regulating valve 17 of the condenser.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (3)
1. A system for utilizing heat of clean-blowing compressed air of a combustion engine is characterized by comprising a condenser (1), a gas turbine blowing cooler (10), a lithium bromide absorption refrigerating unit (12) and an expansion water tank (15); a condensed water outlet of the condenser (1) is sequentially provided with a vacuum valve (2), a filter screen (3), a condensed water pump (4), a check valve (5) and a condensed water outlet electric valve (6), and an outlet of the condensed water outlet electric valve (6) is divided into two paths which are respectively connected with a condensed water main pipe (18) and a condensed water bypass pipeline (19); the device is characterized in that a condensed water bypass electric valve (7), a gas turbine purging cooler (10) and a lithium bromide absorption refrigerating unit (12) are connected onto the condensed water bypass pipeline (19), a gas turbine purging cooling system inlet electric valve (9) and a gas turbine purging cooling system outlet electric valve (11) are respectively installed at the inlet and the outlet of the gas turbine purging cooler (10), the gas turbine purging cooler (10) is provided with a bypass, a gas turbine purging cooling system bypass electric valve (8) is installed on the bypass of the gas turbine purging cooler (10), the lithium bromide absorption refrigerating unit (12) is provided with a bypass, a refrigerating unit bypass electric valve (13) is installed on the bypass of the lithium bromide absorption refrigerating unit (12), and the lithium bromide absorption refrigerating unit (12) is connected with an expansion water tank (15) through an expansion water tank inlet electric valve (14), expansion tank discharge valve (16) are installed at the top of expansion tank (15), expansion tank (15) are connected with the moisturizing entry of condenser (1) through condenser moisturizing electric adjusting valve (17).
2. The system for utilizing heat of the compressed air blown by the combustion engine according to claim 1, wherein two vacuum valves (2), two filter screens (3), two condensate pumps (4), two check valves (5) and two condensate outlet electric valves (6) are respectively arranged.
3. A method of operating a combustion engine purge compressed air heat utilization system as claimed in claim 1 or 2, characterized by the following steps:
condensed water in the condenser (1) sequentially passes through a vacuum valve (2), a filter screen (3), a condensed water pump (4), a check valve (5) and a condensed water outlet electric valve (6) and then is divided into two paths, wherein one path of condensed water enters a waste heat boiler through a condensed water main pipe (18), the other path of condensed water enters a condensed water bypass pipeline (19), and the condensed water bypass electric valve (7) sequentially passes through a gas turbine purging cooling system and a lithium bromide absorption refrigerating unit (12);
condensed water enters a gas turbine purging cooler (10) through a gas turbine purging cooling system inlet electric valve (9) to cool hot compressed air after gas turbine purging, and when the gas turbine purging cooler (10) stops running, the gas turbine purging cooling system bypass electric valve (8) is used for isolating the gas turbine purging cooler (10);
after the condensed water passes through the gas turbine purging and cooling system, the water temperature of the condensed water is increased more, a hot water source with certain quality is formed, and after the hot water source enters the lithium bromide absorption type refrigerating unit (12), the lithium bromide absorption type refrigerating unit (12) outputs a cold water source with the equivalent quality, so that the cold and heat source coupling utilization system is formed by utilizing the part of the cold water source; when the lithium bromide absorption refrigerating unit (12) stops running, the lithium bromide absorption refrigerating unit (12) is isolated through the bypass electric valve (13) of the refrigerating unit;
after condensed water passes through the lithium bromide absorption refrigerating unit (12), the water temperature is reduced to a normal range after heat is released, then the condensed water enters the expansion water tank (15) through the electric valve (14) at the inlet of the expansion water tank, and the water level of the condenser (1) is controlled and adjusted through the electric water-supplementing adjusting valve (17) of the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990294.2A CN112304108B (en) | 2020-09-18 | 2020-09-18 | System and method for utilizing heat of blowing compressed air for combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990294.2A CN112304108B (en) | 2020-09-18 | 2020-09-18 | System and method for utilizing heat of blowing compressed air for combustion engine |
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| CN112304108A CN112304108A (en) | 2021-02-02 |
| CN112304108B true CN112304108B (en) | 2021-12-03 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07305911A (en) * | 1994-05-13 | 1995-11-21 | Tokyo Gas Co Ltd | Waste heat driven absorption refrigerator |
| JP2000146359A (en) * | 1998-11-12 | 2000-05-26 | Toshiba Corp | Cogeneration system |
| CN104632303B (en) * | 2014-12-30 | 2017-07-07 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | The automated intelligent cooling system and method for a kind of gas turbine turbine |
| US10082091B2 (en) * | 2016-08-25 | 2018-09-25 | General Electric Company | Systems and methods to improve shut-down purge flow in a gas turbine system |
| CN207539889U (en) * | 2016-12-16 | 2018-06-26 | 中电投电力工程有限公司 | Gas turbine flue gas residual heat using device |
| CN208040541U (en) * | 2017-11-17 | 2018-11-02 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | Gas turbine cycle flue gas waste heat recovery and inlet gas cooling association system |
| CN109667666B (en) * | 2019-01-08 | 2023-05-09 | 华电电力科学研究院有限公司 | Distributed energy system for solving corrosion and scaling of open cooling system of gas turbine and working method |
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