CN111042926A - Gas turbine air intake system - Google Patents
Gas turbine air intake system Download PDFInfo
- Publication number
- CN111042926A CN111042926A CN202010002539.6A CN202010002539A CN111042926A CN 111042926 A CN111042926 A CN 111042926A CN 202010002539 A CN202010002539 A CN 202010002539A CN 111042926 A CN111042926 A CN 111042926A
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- China
- Prior art keywords
- water
- gas turbine
- collecting tank
- water collecting
- box
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/045—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for noise suppression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
- F02C7/052—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with dust-separation devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a gas turbine air inlet system, which comprises a rain cover, a filtering system, a measuring instrument box, a cooling system, a water removing plate and a fan, wherein the rain cover, the filtering system, the measuring instrument box, the cooling system, the water removing plate and the fan are sequentially arranged at an inlet of a gas turbine from far to near; the cooling system consists of an upper water collecting tank, a lower water collecting tank and a circulating water pump, and a drain pipe is arranged between the upper water collecting tank and the lower water collecting tank; a water spraying box is arranged above the upper water collecting tank, a water outlet hole is formed in the lower surface of the water spraying box, the water spraying box is connected with a circulating water pump through a pipeline, and a stuffing box is arranged between the water spraying box and the upper water collecting tank. The invention has the advantages of environmental protection, no pollution, simple system, low cost and wide applicability.
Description
Technical Field
The invention relates to a gas turbine air intake system.
Background
Along with social development, power consumption is rapidly increased, and rapid development of economic society is powerfully supported. In order to meet the huge demand of electricity, most energy consumption varieties are coal and oil, so that the problems of energy crisis and environmental pollution are more serious. Therefore, the replacement of part of coal for power generation by high-quality clean fuel natural gas is a necessary way for realizing energy conservation, emission reduction and sustainable development of energy supply. The gas turbine burning natural gas is the first choice technology which improves the utilization efficiency of energy resources and solves the problem of environmental pollution quite thoroughly. The gas turbine device is a positive displacement power machine, mainly composed of three basic parts of a compressor, a combustion chamber and a gas turbine, the output power of the gas turbine device depends on the ambient temperature to a great extent, and the lower the temperature is, the higher the output power is.
Therefore, under the condition of high-temperature weather, the air inlet cooling equipment additionally arranged on the gas turbine can effectively reduce the operating temperature of the gas turbine compressor, so that more mixed gas can be combusted in the same time, the work output of the gas turbine is improved, and the method is the most rapid and effective method. At present, the gas turbine inlet air cooling technology mainly comprises two types of cooling type cooling and evaporative type cooling. Compared with a refrigeration type cooling mode, the evaporative cooling has the advantages of wide application range, simple system, low investment and the like, but the evaporative cooling is greatly influenced by the temperature of dry and wet air balls. Meanwhile, the existing gas turbine air inlet system has poor adaptability to regions with low relative humidity all the year around, such as Xinjiang.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a gas turbine air inlet system which is high in cooling efficiency, high in economic benefit, economical and environment-friendly.
The technical scheme is as follows: the gas turbine air inlet system comprises a rain cover, a filtering system, a measuring instrument box, a cooling system, a water removing plate and a fan which are sequentially arranged at an inlet of a gas turbine from far to near; the cooling system consists of an upper water collecting tank, a lower water collecting tank and a circulating water pump, and a drain pipe is arranged between the upper water collecting tank and the lower water collecting tank; a water spraying box is arranged above the upper water collecting tank, a water outlet hole is formed in the lower surface of the water spraying box, the water spraying box is connected with a circulating water pump through a pipeline, and a stuffing box is arranged between the water spraying box and the upper water collecting tank.
The water outlet holes on the water spraying box are circular holes arranged at equal intervals or are in a screen mesh shape.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) the invention has the advantages of environmental protection, no pollution, simple structure and low cost, and the arrangement of the water spraying box can overcome the problems of uneven pressure and insufficient pressure caused by the traditional nozzle structure and also overcome the problem of nozzle blockage, thereby causing uneven cooling;
(2) in the cooling system, the excessive water after evaporation cooling directly flows to the upper water collecting tank and reaches the lower water collecting tank through the drain pipe for continuous evaporation or other use, and in addition, the floating ball and the overflow pipe can discharge the excessive water in the lower water collecting tank in time;
(3) the multistage filtering system is arranged in front of the cooling system, and the water removal plate is arranged behind the cooling system, so that the dust removal and water removal effects on the inlet air can be better realized, and the damage of dust and water mist in the air to the engine body can be effectively reduced;
(4) the cooling system of the invention can play a good role in cooling and humidifying the inlet air of the gas turbine in the area with lower relative humidity all the year around, and is beneficial to realizing high output of the gas turbine in the peak regulation stage.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the cooling system of the present invention;
FIG. 3 is a schematic diagram of the structure of the packing layer in the stuffing box of the present invention;
FIG. 4 is a graph of inlet air temperature drop and gas turbine output analysis after use of the apparatus of the present invention in a city.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in FIG. 1, the gas turbine device generally comprises a compressor 11, a combustion chamber 12 and a gas turbine 13, and is connected with a generator 14 for generating electricity, the invention is positioned at the front end of the compressor, and guides and pretreats air entering the gas turbine to play roles of dedusting, waterproofing and cooling air inlet. The device comprises a rain cover 1 sequentially arranged at an inlet of a gas turbine compressor 11 from far to near, a filtering system consisting of a primary filter 2, a secondary filter 3 and a fine filter 4, a measuring instrument box 5, a cooling system 6, a dewatering plate 7, a silencer 9 and a fan 10. The gauge box 5 is used for measuring dry bulb temperature, wet bulb temperature, relative humidity, water temperature, inlet air speed of air before and after cooling.
Rain cover 1 is the first defence line of combustion engine air intake system, is formed by a plurality of trapezoidal steel sheet longitudinal connections, and its inside is equipped with the water smoke separator, can prevent effectively from all directions that sleet or large granule dust from getting into inside the gas turbine.
The primary filter 2 positioned behind the rain cover 1 primarily filters inlet air, non-woven fabrics are selected and fixed in a stainless steel frame with good waterproof performance in a wavy manner, and 90% of dust particles with the particle size larger than 5 microns can be filtered and removed; the middle-effect filter 3 positioned behind the primary filter further purifies the air entering the combustion engine, adopts a plate structure, selects nylon as a filter material, and has an average filtration rate of 60-80% for dust particles with the particle size of more than 0.4 mu m; the fine filter 4 is used as the last filter of the intake air filtering system, which is related to the final clean degree of the inlet air, so the filtering precision is the highest, a V-shaped filter is adopted, the superfine glass fiber is used as the filtering material, the average filtering rate of dust particles below 0.4 mu m reaches 90 percent, and clean air is provided for a combustion engine as far as possible. The primary filter 2 and the intermediate filter 3 can reduce the workload of the rear filter to a certain extent and can prolong the service life of the fine filter 4.
As shown in fig. 2, the cooling system 6 includes an upper water collecting tank 25, a lower water collecting tank 15, and a circulating water pump 16, and a drain pipe 26 is provided between the upper water collecting tank 25 and the lower water collecting tank 15. A water spraying box 23 is arranged above the upper water collecting tank 25, a water outlet hole is formed in the lower surface of the water spraying box 23, the water spraying box 23 is connected with the circulating water pump 16 through a water supply pipe 22, and a stuffing box 24 is arranged between the water spraying box 23 and the upper water collecting tank 25. The cooling water is first pumped in by the water pump through the water inlet 19, the water pump is favorable to the water to overcome various resistances and circulate constantly, and the direction, the flow and the speed of the water are adjusted through the valve 20. The flow meter 21 measures the water flow rate. The water outlet holes on the water spraying box 23 are circular holes arranged at equal intervals or are in a screen shape. At present, most cooling systems adopt nozzles for spraying, a plurality of nozzles are needed to be arranged for ensuring that water is uniformly distributed on the whole filler, the cost is increased, and the more the nozzles are, the less the spraying pressure is, the problem of insufficient water pressure can occur, and the spraying effect is influenced; in addition, the nozzle is easy to block, the spraying effect is influenced, and the cooling is not uniform. The water is delivered to the top of the water spraying box 23 by the water supply pipe 22, so that the water firstly reaches the inside of the water spraying box, then the water directly flows into the packing uniformly through the holes at the bottom of the box, a water film uniformly distributed is formed on the flow passage surface of the packing, and meanwhile, the entering air and cooling water perform heat and moisture exchange.
The packing in the stuffing box 24 is formed by combining a plurality of layers of corrugated plates in a staggered mode, as shown in figure 3. The adjacent corrugated plates are bonded in a staggered way to form approximately triangular or rhombic flow channels, and the changed channels enable air and water in the flow channels to be subjected to better heat and moisture exchange.
The water discharged from the circulating water pump 16 reaches the water spraying box 23 above the stuffing box 24, water outlet holes are formed in the water spraying box, the water flows into the stuffing box 24 through the water outlet holes, a water film which is uniformly distributed is formed on the flow passage surface of the stuffing, and meanwhile, the entering air and cooling water are subjected to heat and moisture exchange. The upper water collecting tank 25 serves to recover water that has not been evaporated, and the water flows into the lower water collecting tank 15 through the drain pipe 26 and is recycled by the water pump, and the lower water collecting tank 15 is provided with the float 17 and the overflow pipe 18 so that excess water in the water collecting tank can be drained in time.
Because the cooled air can contain vapor and easily causes damage to the equipment of the engine body, a dewatering plate 7 is arranged behind the direct evaporative cooling system, the dewatering plate is usually formed by stacking a plurality of layers of S-shaped plate blocks with the same shape at intervals in parallel, the water in the air cannot be thoroughly removed, in order to more thoroughly remove the water in the air, the dewatering plate adopted by the invention is provided with a plurality of small holes on the basis of the traditional dewatering plate, a molecular sieve 8 is added between the plates at intervals, the molecular sieve is made of porous medium materials, the air treated by the dewatering plate is further dewatered by the molecular sieve between the plate intervals, and the damage to the air compressor is more thoroughly reduced. The silencer 9 is composed of a plurality of porous sound-absorbing boards which are vertically arranged in parallel, and the sound-absorbing materials with low density are arranged in the boards, so that the noise generated by the air flow at the inlet can be effectively eliminated, and the noise with other frequencies can be also weakened to a certain extent.
The gas turbine air inlet system is applied to a 701F4 type gas turbine in a certain city, and the temperature drop and the gas turbine output after the direct evaporative cooling air inlet system is added are analyzed, as shown in figure 4. When the inlet air temperature is higher than 15 ℃, the inlet air cooling system needs to be operated, and according to statistics, 4242h can be used all year round to cool the inlet air system by direct evaporation. In addition, a direct evaporative cooling air inlet system is additionally arranged, so that the maximum temperature drop per month brought by the air inlet temperature of the gas turbine reaches 6.6-17.4 ℃, and the average temperature drop per month is about 2.9-8.2 ℃. In the three months to the november of the statistical year, the gas turbine air inlet system with direct evaporative cooling of the invention is additionally arranged, so that the output of the gas turbine is improved to a certain extent, and the increase rate reaches 3.33% -10.23%, therefore, the conclusion can be drawn that the gas turbine air inlet system of the invention can greatly improve the output of the gas turbine and bring higher economic benefit for a power plant.
Claims (9)
1. The gas turbine air inlet system is characterized by comprising a rain cover (1), a filtering system, a cooling system (6), a water removing plate (7) and a fan (10) which are sequentially arranged at an inlet of a gas turbine from far to near; the cooling system (6) consists of an upper water collecting tank (25), a lower water collecting tank (15) and a circulating water pump (16), and a drain pipe (26) is arranged between the upper water collecting tank and the lower water collecting tank; a water spraying box (23) is arranged above the upper water collecting tank (25), a water outlet hole is formed in the lower surface of the water spraying box (23), the water spraying box is connected with a circulating water pump (16) through a pipeline, and a stuffing box (24) is arranged between the water spraying box and the upper water collecting tank.
2. Gas turbine air inlet system according to claim 1, characterized in that the outlet openings on the watering box (23) are circular holes arranged equidistantly.
3. Gas turbine air inlet system according to claim 1, characterized in that the outlet openings in the sprinkling box (23) are in the form of a screen.
4. A gas turbine air intake system according to claim 1, wherein the packing in the stuffing box (24) is formed by a plurality of layers of corrugated sheets in a staggered combination.
5. Gas turbine air intake system according to claim 1, characterized in that the filter system consists of a primary filter (2), a secondary filter (3) and a fine filter (4).
6. The gas turbine intake system according to claim 1, wherein a float ball (17) and an overflow pipe (18) are provided in the lower water collecting tank (15), and a valve (20) and a flow meter (21) are provided on a connection pipe between the water spraying box and the circulating water pump.
7. The gas turbine air intake system of claim 1, wherein the surfaces of the water-removing plates (7) are provided with perforations, and a molecular sieve (8) is arranged between the wall surfaces of the water-removing plates, and is made of a porous medium material.
8. Gas turbine air inlet system according to claim 1, characterized in that a silencer (9) is provided between the water deflector (7) and the fan (10).
9. Gas turbine air inlet system according to claim 8, characterized in that the silencer (9) consists of parallel partition plates, which are perforated sound-absorbing plates with low-density sound-absorbing material inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002539.6A CN111042926B (en) | 2020-01-02 | 2020-01-02 | Gas turbine air inlet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002539.6A CN111042926B (en) | 2020-01-02 | 2020-01-02 | Gas turbine air inlet system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111042926A true CN111042926A (en) | 2020-04-21 |
| CN111042926B CN111042926B (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010002539.6A Active CN111042926B (en) | 2020-01-02 | 2020-01-02 | Gas turbine air inlet system |
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| Country | Link |
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| CN (1) | CN111042926B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927627A (en) * | 2020-07-15 | 2020-11-13 | 龙游中机新奥智慧能源有限公司 | Cooling and effect improving device for gas inlet system of gas turbine |
| CN114109608A (en) * | 2021-11-29 | 2022-03-01 | 林胜杰 | Gas turbine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201697257U (en) * | 2010-02-01 | 2011-01-05 | 西安工程大学 | Spray-type air cooler and cross-flow high-efficiency chiller capable of direct evaporative cooling |
| CN202024429U (en) * | 2011-03-17 | 2011-11-02 | 西安工程大学 | Four-level direct evaporative cooling air conditioning unit combining high pressure atomizing with dropping and sprinkling padding |
| CN103470379A (en) * | 2013-09-09 | 2013-12-25 | 无锡金龙石化冶金设备制造有限公司 | Combined type energy-saving gas turbine inlet air cooling system |
| CN105840316A (en) * | 2016-06-12 | 2016-08-10 | 华电郑州机械设计研究院有限公司 | System for intake cooling and dehumidification of gas turbine by using LNG cold energy |
| CN107269394A (en) * | 2017-06-20 | 2017-10-20 | 江苏人和环保设备有限公司 | A kind of filter for gas turbine inlet |
| CN208816238U (en) * | 2018-06-21 | 2019-05-03 | 浙江卫星能源有限公司 | A kind of inlet gas cooling device of gas turbine group |
-
2020
- 2020-01-02 CN CN202010002539.6A patent/CN111042926B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201697257U (en) * | 2010-02-01 | 2011-01-05 | 西安工程大学 | Spray-type air cooler and cross-flow high-efficiency chiller capable of direct evaporative cooling |
| CN202024429U (en) * | 2011-03-17 | 2011-11-02 | 西安工程大学 | Four-level direct evaporative cooling air conditioning unit combining high pressure atomizing with dropping and sprinkling padding |
| CN103470379A (en) * | 2013-09-09 | 2013-12-25 | 无锡金龙石化冶金设备制造有限公司 | Combined type energy-saving gas turbine inlet air cooling system |
| CN105840316A (en) * | 2016-06-12 | 2016-08-10 | 华电郑州机械设计研究院有限公司 | System for intake cooling and dehumidification of gas turbine by using LNG cold energy |
| CN107269394A (en) * | 2017-06-20 | 2017-10-20 | 江苏人和环保设备有限公司 | A kind of filter for gas turbine inlet |
| CN208816238U (en) * | 2018-06-21 | 2019-05-03 | 浙江卫星能源有限公司 | A kind of inlet gas cooling device of gas turbine group |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927627A (en) * | 2020-07-15 | 2020-11-13 | 龙游中机新奥智慧能源有限公司 | Cooling and effect improving device for gas inlet system of gas turbine |
| CN111927627B (en) * | 2020-07-15 | 2021-09-07 | 龙游新奥智慧能源有限公司 | Cooling and effect improving device for gas inlet system of gas turbine |
| CN114109608A (en) * | 2021-11-29 | 2022-03-01 | 林胜杰 | Gas turbine |
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| Publication number | Publication date |
|---|---|
| CN111042926B (en) | 2023-06-20 |
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