CN113648746B - Pulse injection method for gas turbine - Google Patents
Pulse injection method for gas turbine Download PDFInfo
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- CN113648746B CN113648746B CN202110942691.7A CN202110942691A CN113648746B CN 113648746 B CN113648746 B CN 113648746B CN 202110942691 A CN202110942691 A CN 202110942691A CN 113648746 B CN113648746 B CN 113648746B
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- heater
- pulse
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- air
- filter unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
Abstract
The utility model provides a pulse jetting device for gas turbine, includes filter unit, be equipped with in the filter unit and strain a section of thick bamboo, strain a section of thick bamboo top and be equipped with the spray tube, strain a section of thick bamboo below and be equipped with and turn over the board heater, turn over the board heater and be connected with the cylinder of fixed mounting in filter unit, the cylinder is connected through solenoid valve and PLC control system, PLC control system still is connected with pulse valve, dew point meter, warm and humid acidimeter, differential pressure transformer respectively with arrange in and strain 2 pressure sensing diaphragms at a section of thick bamboo upper and lower both ends and be connected, the spray tube is connected with arranging the outside pulse valve of filter unit in, solenoid valve and pulse valve all are connected with compressed air. The device can be started according to different meteorological conditions and different blowing modes, so that the air filter can normally operate under meteorological conditions such as rain, snow, fog and the like, the safe operation of the gas turbine is effectively guaranteed, and the device has the characteristics of good blowing effect, strong environmental adaptability and energy conservation.
Description
Technical Field
The invention relates to a pulse blowing method for a gas turbine.
Background
The gas turbine is one of internal combustion engines, and converts internal energy of fuel into electric energy by combusting the fuel and pushing an impeller to rotate and generate electricity by air compressed by an air compressor. In the process of energy conversion, a gas turbine sucks a large amount of air, and dust and pollutants in the air make the gas turbine easily damaged by erosion, scaling, melting, corrosion and the like, so that serious consequences such as rotor thermal unbalance vibration, turbine blade creep deformation and fracture, thermal coating abrasion, blade abrasion, combustion chamber part burning loss and the like are caused. At present, the gas turbine adopts a mode of configuring a plurality of filters in front of a compressor to purify air, and requires long-time continuous operation. One of the common forms is to configure a set of pulse blowing devices to blow off dust accumulated on filter cartridges, so as to prolong the service life of the filter cartridges and ensure long-term stable operation of a gas turbine generator set. The typical control modes are three, one is manual opening; one is timing starting; one is to arrange a detection device for detecting the pressure difference between the upstream and the downstream of the filter, and when the pressure difference reaches a set value, pulse back blowing is started.
The common defects of the methods are poor reliability and energy conservation, and particularly when the high-humidity environment such as rain, snow or haze is met, water vapor can be condensed on the filter cylinder and is fused with accumulated dust to form paste or even ice, so that the power of the filter cylinder rapidly rises, pulse injection cannot blow off, and the resistance of the gas turbine rapidly rises to a trip set value, so that a production stop accident is caused.
Disclosure of Invention
The invention aims to provide a pulse injection device for a gas turbine, which can ensure that an air filter can normally operate under meteorological conditions such as rain, snow, fog and the like, and effectively ensure the safe operation of the gas turbine, so as to solve the problems in the background technology.
The technical scheme adopted for achieving the purpose is that the pulse injection method for the gas turbine can be achieved on a pulse injection device, the pulse injection device comprises a filter unit, a filter cylinder is arranged in the filter unit, a spray pipe is arranged above the filter cylinder, a turning plate heater is arranged below the filter cylinder, the turning plate heater is connected with an air cylinder fixedly installed in the filter unit, the air cylinder is connected with a PLC control system through an electromagnetic valve, the PLC control system is also connected with a pulse valve, a dew point meter, a hygrothermograph and a differential pressure transformer respectively, the differential pressure transformer is connected with 2 pressure sensing membranes arranged on the upper stream and the lower stream of the filter cylinder respectively, the spray pipe is connected with the pulse valve arranged outside the filter unit, and the electromagnetic valve and the pulse valve are both connected with compressed air;
the blowing modes of the pulse blowing device comprise a first mode and a second mode:
when t is satisfied Dew point Not more than 0 ℃ or t Environment(s) -t Dew point At 5 ℃ or below, a first starting mode:
when the pressure difference delta p reaches a preset value delta p1, the turning plate heater is started and heated for T time, meanwhile, the air cylinder drives the turning plate heater to rotate to enable the angle alpha to reach a preset angle alpha 1, the PLC control system starts a pulse valve to enable air flow to be sprayed out from a spray hole in the spray pipe towards the filter cylinder, and dust in the filter cylinder is blown off to finish self-cleaning;
when t is not satisfied Dew point Not more than 0 ℃ or t Environment(s) -t Dew point At 5 ℃ or less, starting the mode II:
when the pressure difference delta p reaches a preset value delta p2, heating is not started, the air cylinder drives the flap heater to rotate to enable the angle alpha to reach a preset angle alpha 1, the PLC control system starts the pulse valve to enable air flow to be sprayed out from a spray hole in the spray pipe, dust in the filter cylinder is blown off, and self-cleaning is completed; and Δ p1 < Δ p2.
Furthermore, the plate turnover heater comprises a rotating shaft, a turning plate and a connecting rod, wherein one end of the turning plate is connected with the rotating shaft, the other end of the turning plate is connected with the connecting rod, and the connecting rod is connected with the output end of the air cylinder.
Furthermore, the rotating shaft and the turning plates are provided with a plurality of rotating shafts, one ends of the turning plates are correspondingly connected with the rotating shafts, and the other ends of the turning plates are connected with the connecting rods.
Further, the flap heater is arranged at the air inlet in the filtering unit; the heater is integrally installed in a turning plate of the turning plate heater, and the heater and the turning plate form an integral structure; the heating forms of the heater include, but are not limited to, electric heating, steam heating, and compressor bleed air heating.
Advantageous effects
Compared with the prior art, the invention has the following advantages.
The invention has the functions of heating and drying, turning over the board and turning over the throttle and pulse injection, etc., can start according to different meteorological conditions according to different injection modes, make the air cleaner can run normally under meteorological conditions such as rain, snow, fog, etc., guarantee the safe operation of the gas turbine effectively; the invention is suitable for various types of gas turbines, and has the advantages of good injection effect, strong environmental adaptability and energy saving.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a flap heater according to the present invention;
FIG. 3 is a control flow chart of the present invention.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings.
As shown in fig. 1 and 2, a pulse blowing device for a gas turbine comprises a filter unit 10, wherein a filter cylinder 3 is arranged in the filter unit 10, a spray pipe 2 is arranged above the filter cylinder 3, a flap heater 4 is arranged below the filter cylinder 3, the flap heater 4 is connected with a cylinder 5 fixedly installed in the filter unit 10, the cylinder 5 is connected with a PLC control system 7 through an electromagnetic valve 11, the PLC control system 7 is further respectively connected with a pulse valve 1, a dew point meter 6, a hygrothermograph 8 and a differential pressure transformer 9, the differential pressure transformer 9 is respectively connected with 2 pressure sensing membranes 12 arranged on the upper and lower parts of the filter cylinder 3, the spray pipe 2 is connected with the pulse valve 1 arranged outside the filter unit 10, and the electromagnetic valve 11 and the pulse valve 1 are both connected with compressed air.
The flap heater 4 comprises a rotating shaft 401, a flap 402 and a connecting rod 403, wherein one end of the flap 402 is connected with the rotating shaft 401, the other end of the flap 402 is connected with the connecting rod 403, and the connecting rod 403 is connected with the output end of the cylinder 5.
The rotating shaft 401 and the turning plates 402 are respectively provided with a plurality of rotating shafts 401, one ends of the turning plates 402 are correspondingly connected with the rotating shafts 401, and the other ends of the turning plates 402 are respectively connected with the connecting rods 403.
The flap heater 4 is arranged at the air inlet in the filtering unit 10; the heater is integrated in the turning plate 402 of the turning plate heater 4, and the heater and the turning plate 402 form an integral structure; the heating forms of the heater include, but are not limited to, electric heating, steam heating, and compressor bleed air heating.
In the present invention, the filter unit 10 can be used by combining a plurality of filter units; the flap heater 4 consists of a rotating shaft 401, a flap 402 and a connecting rod 403, and a heater is integrated in the flap 402; the connecting rod 403 is connected with the cylinder 5 and can drive the turning plate 402 to turn along the rotating shaft 401.
The invention has the functions of heating and drying, turnover plate turning and throttling, pulse blowing and the like, and the pressure difference value is preset: delta p1 is less than delta p2, pulse injection can be started according to different injection modes according to different meteorological conditions, the injection modes comprise a first mode and a second mode, and the control flow is shown in figure 3:
the first mode is as follows: starting when the following environmental conditions are met.
t Dew point Not more than 0 ℃ or t Environment(s) -t Dew point ≤5°C；
In the first mode, when the detected pressure difference delta p reaches the preset value delta p1, the turning plate heater starts the heating time T, meanwhile, the air cylinder 5 drives the turning plate heater 4 to rotate to enable the angle alpha to reach the preset angle alpha 1, the PLC control system 7 starts the pulse valve 1 to enable air flow to be sprayed out from the spray hole in the spray pipe 2 towards the filter cartridge 3, dust in the filter cartridge 3 is blown off, and the self-cleaning process is completed.
The mode is a mode for coping with a high-humidity environment, when the environment condition is met, heating is started firstly, the relative humidity of inlet air is reduced, and the moisture of the filter cylinder is dried, so that dust is easy to blow off; secondly, the turning plate heater is turned over, so that the air enters after turning, and the turning plate heater has two benefits, on one hand, partial moisture in the air is separated through turning of the air, on the other hand, the air inlet resistance of the unit is improved, more air enters from other units, so that the air inlet flow of the unit is reduced, and dust is blown off more easily during blowing; thirdly, the preset value delta p1 is less than delta p2, so that the blowing system can blow back in advance compared with the mode II, and the machine tripping fault caused by rapid rise of pressure difference can be avoided more easily.
And a second mode: starting a second mode when the environmental condition of the first mode is not met;
in the second mode, when the detected pressure difference delta p reaches the preset value delta p2, heating is not started, the air cylinder 5 drives the turning plate heater 4 to rotate to enable the angle alpha to reach the preset angle alpha 1, the PLC control system 7 starts the pulse valve 1 to enable air flow to be sprayed out from the spray holes in the spray pipe 2, dust in the filter cylinder 3 is blown off, and the self-cleaning process is completed.
The heater is not started in the mode, so that the energy consumption of the system is reduced; the plate turnover is turned over to improve the blowing effect, the preset value delta p2 is larger than delta p1, the blowing frequency is further reduced, and the energy consumption is effectively reduced.
When the pulse blowing is not started, the turnover angle alpha =90 degrees and the turnover panel is in a fully opened state, and at the moment, the air inlet resistance is lowest, so that the energy-saving and energy-consumption effects are achieved. Because some dust can not be blown off after each blowing, the preset angle alpha can be a plurality of angles through the further invention, the corresponding value K = resistance after blowing/resistance before blowing, and when the value K is smaller than the threshold value Ki, the corresponding turning angle alpha i is obtained. During initial use, jetting is effectual, and the K value is less, can overturn less angle of predetermineeing, along with the K value constantly promotes in the use, and rotation angle constantly increases is favorable to promoting jetting effect, increase of service life. When the K value reaches a certain higher set value Ks, the effect of recovering the performance of the filter cylinder through blowing is very poor, and a filter cylinder replacement signal can be sent at the moment, which is favorable for
Early warning is to replace the filter cartridge in time when production is stopped.
Claims (4)
1. The pulse blowing method for the gas turbine is characterized by being realized on a pulse blowing device, wherein the pulse blowing device comprises a filter unit (10), a filter cylinder (3) is arranged in the filter unit (10), a spray pipe (2) is arranged above the filter cylinder (3), a flap heater (4) is arranged below the filter cylinder (3), the flap heater (4) is connected with an air cylinder (5) fixedly installed in the filter unit (10), the air cylinder (5) is connected with a PLC (programmable logic controller) system (7) through an electromagnetic valve (11), the PLC control system (7) is further connected with a pulse valve (1), a dew point instrument (6), a hygrothermograph (8) and a differential pressure transformer (9), the differential pressure transformer (9) is respectively connected with 2 pressure sensing films (12) arranged on the upper and lower streams of the filter cylinder (3), the spray pipe (2) is connected with the pulse valve (1) arranged outside the filter unit (10), and the electromagnetic valve (11) and the pulse valve (1) are both connected with compressed air;
the blowing modes of the pulse blowing device comprise a first mode and a second mode:
when t is satisfied Dew point Not more than 0 ℃ or t Environment(s) of -t Dew point 5 ℃ or less, starting the first mode:
when the pressure difference delta p reaches a preset value delta p1, the turning plate heater (4) is started and heated for T time, and meanwhile, the air cylinder (5) drives the turning plate heater (4) to rotate to enable the angle alpha to reach a preset angle alpha 1 The PLC control system (7) starts the pulse valve (1) to enable air flow to be sprayed out from the spray holes in the spray pipe (2) towards the filter cylinder (3) and blow off dust in the filter cylinder (3) to finish self-cleaning;
when t is not satisfied Dew point Not more than 0 ℃ or t Environment(s) of -t Dew point At 5 ℃ or less, starting the mode II:
when the pressure difference delta p reaches a preset value delta p2, heating is not started, and the air cylinder (5) drives the turning plate heater (4) to rotate to enable the angle alpha to reach a preset angle alpha 1 The PLC control system (7) starts the pulse valve (1) to enable airflow to be sprayed out from spray holes in the spray pipe (2) and blow off dust in the filter cartridge (3) to finish self-cleaning; and Δ p1 < Δ p2.
2. The pulse blowing method for a gas turbine according to claim 1, characterized in that the flap heater (4) comprises a rotating shaft (401), a flap (402) and a connecting rod (403), one end of the flap (402) is connected to the rotating shaft (401), the other end of the flap (402) is connected to the connecting rod (403), and the connecting rod (403) is connected to the output end of the cylinder (5).
3. The pulse blowing method for the gas turbine according to claim 2, wherein there are a plurality of rotating shafts (401) and turning plates (402), one end of each of the turning plates (402) is correspondingly connected to the plurality of rotating shafts (401), and the other end of each of the turning plates (402) is connected to a connecting rod (403).
4. A pulse blowing method for a gas turbine according to claim 2, characterised in that the flap heater (4) is placed at the inlet air in the filter unit (10); a heater is integrally installed in a turning plate (402) of the turning plate heater (4), and the heater and the turning plate (402) form an integral structure; the heating form of the heater is electric heating, steam heating or air-bleed heating of the air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110942691.7A CN113648746B (en) | 2021-08-17 | 2021-08-17 | Pulse injection method for gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110942691.7A CN113648746B (en) | 2021-08-17 | 2021-08-17 | Pulse injection method for gas turbine |
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| CN113648746A CN113648746A (en) | 2021-11-16 |
| CN113648746B true CN113648746B (en) | 2022-12-02 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5261934A (en) * | 1992-03-17 | 1993-11-16 | Nordson Corporation | Powder collection method and apparatus with isolated filter pulsing and compression mounted cartridges |
| EP2075048A1 (en) * | 2007-12-18 | 2009-07-01 | Dall'Oglio, Stefano | Method and biological filtering system with regeneration of filtering |
| CN104514632A (en) * | 2014-11-28 | 2015-04-15 | 成都博世德能源科技股份有限公司 | Rotating vane-type high efficiency air filter unit used for gas turbine |
| CN104533625A (en) * | 2014-11-26 | 2015-04-22 | 成都博世德能源科技股份有限公司 | Efficient energy-saving rotating-vane type air filtration apparatus |
| CN105156213A (en) * | 2015-08-26 | 2015-12-16 | 成都博世德能源科技股份有限公司 | Efficient filtering device for gas turbine |
| CN105221267A (en) * | 2015-08-26 | 2016-01-06 | 成都博世德能源科技股份有限公司 | A kind of vibration counter-blow type filter for gas turbine |
| CN112682176A (en) * | 2020-12-22 | 2021-04-20 | 中国船舶重工集团公司第七0三研究所 | Dust exhaust system and dust exhaust method for gas turbine inlet air filter device |
-
2021
- 2021-08-17 CN CN202110942691.7A patent/CN113648746B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5261934A (en) * | 1992-03-17 | 1993-11-16 | Nordson Corporation | Powder collection method and apparatus with isolated filter pulsing and compression mounted cartridges |
| EP2075048A1 (en) * | 2007-12-18 | 2009-07-01 | Dall'Oglio, Stefano | Method and biological filtering system with regeneration of filtering |
| CN104533625A (en) * | 2014-11-26 | 2015-04-22 | 成都博世德能源科技股份有限公司 | Efficient energy-saving rotating-vane type air filtration apparatus |
| CN104514632A (en) * | 2014-11-28 | 2015-04-15 | 成都博世德能源科技股份有限公司 | Rotating vane-type high efficiency air filter unit used for gas turbine |
| CN105156213A (en) * | 2015-08-26 | 2015-12-16 | 成都博世德能源科技股份有限公司 | Efficient filtering device for gas turbine |
| CN105221267A (en) * | 2015-08-26 | 2016-01-06 | 成都博世德能源科技股份有限公司 | A kind of vibration counter-blow type filter for gas turbine |
| CN112682176A (en) * | 2020-12-22 | 2021-04-20 | 中国船舶重工集团公司第七0三研究所 | Dust exhaust system and dust exhaust method for gas turbine inlet air filter device |
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| CN113648746A (en) | 2021-11-16 |
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