CN107013503B - Reverse blowing cleaning system and cleaning method for air inlet filter element of gas turbine - Google Patents
Reverse blowing cleaning system and cleaning method for air inlet filter element of gas turbine Download PDFInfo
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- CN107013503B CN107013503B CN201710439775.2A CN201710439775A CN107013503B CN 107013503 B CN107013503 B CN 107013503B CN 201710439775 A CN201710439775 A CN 201710439775A CN 107013503 B CN107013503 B CN 107013503B
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- pressure measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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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
- F02C7/055—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with intake grids, screens or guards
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
Abstract
The invention discloses a reverse blowing cleaning system of an air inlet filter element of a gas turbine, which comprises a filter element, wherein the filter element is arranged in the filter, the filter is arranged at the position of an air inlet area of an air inlet pipeline of a gas compressor, front side pressure measuring points and rear side pressure measuring points for testing air pressure are respectively arranged on the front side and the rear side of the filter element, and a reverse blowing period calculating module controls the action of a filter element reverse blowing device through an upper computer according to the difference value of data of the front side pressure measuring points and the rear side pressure measuring points of the filter element. And discloses a cleaning method by adopting the system. The invention solves the problem of energy waste caused by the fact that the existing back-blowing device of the gas turbine inlet filter operates in a fixed operation period. The filter element back-flushing device is opened when needed.
Description
Technical Field
The invention belongs to the field of application of operation and maintenance technologies of gas turbines, and particularly relates to a back-blowing cleaning system and a cleaning method for an air inlet filter element of a gas turbine.
Background
In order to improve the inflow air quality of the gas turbine combined cycle generator set during operation and avoid the reduction of the running performance of the set caused by the surface scale deposition, efficiency and pneumatic performance reduction of the compressor blade, a gas filter is arranged at the inlet of the compressor of the gas turbine. With the extension of the running time, the filter screen of the air inlet filter of the air compressor can be gradually blocked by particulate matters in the air, so that the pressure difference between the front and the rear of the filter screen of the air compressor is gradually increased, the accumulated ash is blown off by using a back blowing device regularly, otherwise, the air inlet pressure and the flow are influenced, and the economy of the unit is reduced. However, the working air flow of the blowback device is derived from the compressed air in the power plant, and the generation of the compressed air requires the consumption of electric energy. Therefore, the back-flushing device cannot be used uninterruptedly, otherwise, the energy consumption is huge.
Because the air inlet filter is formed by a group of filter elements which are arranged along the vertical direction, particles in the air are easier to deposit and adhere on the filter elements at the middle and lower parts under the action of gravity and a flow field, the filter elements at different positions are blocked to different degrees along with continuous operation of a unit, in general, the filters at the middle part and the lower part are easier to block, and the distribution conditions of blocked areas in the filter groups of different areas and different types of units are often different, but in actual operation, the blowback device of the traditional air inlet filter system can only uniformly open the blowback devices of all the filter elements to carry out blowback due to the fact that the filter elements at which area are blocked seriously cannot be judged, so that the waste of compressed air and energy sources is caused. Meanwhile, the blowback device of the traditional air inlet filter system cannot judge the optimal opportunity of blowback, only can set fixed time for blowback, and the fixed time of blowback is determined more randomly, lacks theoretical basis, often causes frequent blowback to waste energy or low blowback frequency to reduce the economy of the unit.
Disclosure of Invention
The invention provides a back-flushing cleaning system for an air inlet filter element of a gas turbine, which enables a filter element back-flushing device to be started when needed, and avoids the waste caused by the traditional periodic starting.
Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a gas turbine air inlet filter core blowback clearance system, includes the filter core, the filter core is installed in the filter, and the filter is installed in the air inlet area position of compressor air inlet line, both sides all are provided with the front side pressure measurement point and the back side pressure measurement point that are used for testing air pressure respectively around the filter core, and blowback cycle calculation module is according to the difference of the data of filter core front side pressure measurement point and back side pressure measurement point through host computer control filter core blowback device action.
As a still further technical scheme of the invention: the filter element is divided into a plurality of areas from top to bottom, pressure measuring points are arranged on the front side and the rear side of each area, the data of the front side pressure measuring point is the average value of the pressure measuring point data of each area on the front side of the filter element, and the data of the rear side pressure measuring point is the average value of the pressure measuring point data of each area on the rear side of the filter element.
As a still further technical scheme of the invention: the rear side of the filter element of each region also comprises a Pitot tube and a wind speed tester which are used for measuring the air flow rate behind the filter element of the region, each region is provided with a filter element blowback device corresponding to each region, the Pitot tube and the wind speed tester transmit measured data to a blowback region searching module, and the blowback region searching module controls the filter element blowback devices corresponding to each region to work through an upper computer after judging.
As a still further technical scheme of the invention: the back-blowing area searching module judges that the back-blowing area searching module compares the air flow velocity v1 behind the filter element in the upper part, the air flow velocity v2 behind the filter element in the middle part and the air flow velocity v3 behind the filter element in the lower part, and finds out the minimum value, so that signals are transmitted to the upper computer, and the upper computer selects the filter element back-blowing device in the corresponding area to carry out targeted back-blowing on the corresponding area.
As a still further technical scheme of the invention: and the pressure measuring points at the front side and the rear side of each region are transmitted to a blowback period calculation module through a pressure difference meter.
As a still further technical scheme of the invention: the filter element is divided into three areas from top to bottom, namely an upper area, a middle area and a lower area; the front and rear positions of each region of the filter element are respectively provided with a pressure measuring point, and the front side pressure measuring point I and the rear side pressure measuring point I are respectively arranged on the front side and the rear side of the upper region; the front side pressure measurement point II and the rear side pressure measurement point II are respectively arranged on the front side and the rear side of the middle area; front side pressure measuring points III and rear side pressure measuring points III are respectively arranged on the front side and the rear side of the lower region; the rear side of each region of the filter element is provided with a corresponding filter element back-blowing device, the filter element back-blowing device comprises an upper filter element back-blowing device, a middle filter element back-blowing device and a lower filter element back-blowing device, the upper filter element back-blowing device is arranged in the upper region, the middle filter element back-blowing device is arranged in the middle region, and the lower filter element back-blowing device is arranged in the lower region; the blowback period calculation module compares the difference value between the average value of the data acquired by the front side pressure measuring point I, the front side pressure measuring point II and the front side pressure measuring point III and the average value of the data acquired by the rear side pressure measuring point I, the rear side pressure measuring point II and the rear side pressure measuring point III, and respectively controls the filter element blowback device through the upper computer after judgment and calculation.
As a still further technical scheme of the invention: the three pitot tubes are respectively an upper pitot tube, a middle pitot tube and a lower pitot tube, and are sequentially arranged in the corresponding upper region, middle region and lower region from top to bottom; the upper pitot tube is connected to the upper wind speed tester, the middle pitot tube is connected to the middle wind speed tester, and the lower pitot tube is connected to the lower wind speed tester; the upper wind speed tester, the middle wind speed tester and the lower wind speed tester are all connected to a blowback area searching module, and the blowback area searching module is connected to an upper computer.
As a further technical scheme of the invention: the calculation and judgment method of the blowback period calculation module is as follows: firstly, calculating real-time differential pressure delta p of the filter element front and back according to the difference value between the region front side pressure measuring point and the region rear side pressure measuring point f ' in combination with the current barometric pressure value p 0 From the known differential pressure delta p between the front and rear of the rated filter element f Calculating the inlet pressure p of the compressor under the pressure difference between the front and the rear of the rated filter element in Compressor inlet pressure p under current actual filter element front-rear pressure difference in '：
p in ＝p 0 -Δp f (1)
p in '＝p 0 -Δp f ' (2)
Therefore, the inlet pressure loss delta p of the compressor caused by the pressure difference between the front and the rear of the current actual filter element in The following are provided:
Δp in ＝p in -p in ' (3)
due to gas turbine inlet, i.e. compressor outlet pressure p out The pressure ratio pi of the rated filter element at the front-back differential pressure is obtained by keeping the pressure at the same value no matter at any inlet pressure c Pressure ratio pi of actual filter element under front-rear pressure difference c '：
Further solving the specific work loss delta W caused by the pressure difference between the front and the rear of the current actual filter element of the air compressor C Specific work W under rated pressure difference C Is the relation of:
wherein k is an adiabatic index, i.e., the ratio of the specific heat capacity at constant pressure to the specific heat capacity at constant capacity;
the relative amount of change in power is further available:
wherein P is C For rated power of the compressor under differential pressure of front and rear of filter element, delta P C The power loss of the compressor under the differential pressure of the front and rear of the current actual filter element can be converted into the power loss cost delta C of the compressor through electricity price C ；
At the same time, the real-time cost C which is needed to bear if the filter element blowback is carried out from the current moment is calculated s ：
C s ＝qQ r C e (8)
Wherein Q is the compressed air quantity required by back blowing, Q r C for generating the electric quantity required by the compressed air e The online electricity price is obtained;
finally, comparing the power loss cost delta C of the compressor caused by the front-rear differential pressure of the current filter element C Comprehensive real-time cost C needed to bear with back flushing of filter element s Size of the space, if C s ＞ΔC C The cost of back blowing of the filter element at the current moment is higher than the cost of performance reduction of the air compressor, and the back blowing is unnecessary, so that the process of calculating the above from the beginning at the next moment is started; if C s ≤ΔC C And the fact that the performance reduction cost of the air compressor reaches a critical value or exceeds the real-time comprehensive cost of back flushing of the filter element is indicated, back flushing is needed to be performed immediately, and an instruction signal for back flushing of the filter element is fed back to the upper computer immediately.
A cleaning method adopting a gas turbine air inlet filter element back-blowing cleaning system mainly comprises the following steps: firstly, calculating to obtain a pressure measuring point of a front side area of the filter element and a pressure measuring point of a rear side area of the filter element, measuring real-time differential pressure of the front and rear sides of the filter element, inputting the differential pressure into a back-flushing period calculation module, and then calculating to obtain the power loss cost of the compressor; and when judging that the power loss cost of the compressor caused by the front-rear pressure difference of the current filter element is greater than the comprehensive real-time cost Cs needing to be born by the back blowing of the filter element, the back blowing period calculation module transmits a signal to the upper computer, and the upper computer controls the filter element back blower device to work.
Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1) The invention aims to solve the problem of energy waste caused by the fact that the existing back blowing device of the gas turbine inlet filter operates in a fixed operation period.
2) The invention can make the collection of the differential pressure value before and after the filter screen more accurate based on the multipoint differential pressure measurement method, can accurately calculate the back blowing period by combining with the calculation method of the power loss cost of the air compressor, enables the filter element back blowing device to be opened when required, and avoids the waste caused by the traditional periodic opening.
3) The invention can find out which part of the filter element is blocked to seriously influence the operation of the unit based on the multipoint flow measurement, thereby carrying out targeted back flushing on the part of the filter element. Therefore, the fully-opened operation mode of the traditional filter element blowback device is avoided, the loss is reduced, and the energy is saved.
Drawings
FIG. 1 is a schematic diagram of a back-blowing cleaning system for an air inlet filter element of a gas turbine according to an embodiment of the invention.
FIG. 2 is a flowchart illustrating a determination of a blowback period calculation module in a blowback cleaning system for an intake filter element of a gas turbine according to an embodiment of the present invention.
In the figure: 1-pressure measuring point I, 2-pressure measuring point II, 3-pressure measuring point III, 4-pressure measuring point IV, 5-pressure measuring point five, 6-pressure measuring point six, 7-upper pitot tube, 8-middle pitot tube, 9-lower pitot tube, 10-upper filter element blowback device, 11-middle filter element blowback device, 12-lower filter element blowback device, 13-differential pressure gauge, 14-lower wind speed tester, 15-middle wind speed tester, 16-upper wind speed tester, 17-blowback period calculation module, 18-blowback region search module, 19-upper computer, 20-inlet pipeline, 21-air inlet and 22-filter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The front side as referred to herein means the left side of fig. 1, and the rear side means the right side of fig. 1;
as shown in fig. 1, the back-blowing cleaning system for the air inlet filter element of the gas turbine comprises a filter element 22, a pressure measuring point, a pitot tube, an air speed tester, a filter element back-blowing device, a back-blowing period calculation module 17, a back-blowing area search module 18 and an upper computer 19;
the filter element 22 is arranged in a filter, the filter is arranged at the position of an air inlet area 21 of the air inlet pipeline 20 of the air compressor, and the filter element 22 is divided into three areas from top to bottom, namely an upper area, a middle area and a lower area; the front and rear positions of each region of the filter element 22 are respectively provided with a pressure measuring point, and the front side pressure measuring point 1 and the rear side pressure measuring point 4 are respectively arranged on the front side and the rear side of the upper region; the front side pressure measurement II and the rear side pressure measurement II 5 are respectively arranged on the front side and the rear side of the middle area; front side pressure measuring points III 3 and rear side pressure measuring points III 6 are respectively arranged on the front side and the rear side of the lower region;
the rear side of each region of the filter element 22 is provided with a corresponding filter element back-blowing device, the filter element back-blowing device comprises an upper filter element back-blowing device 10, a middle filter element back-blowing device 11 and a lower filter element back-blowing device 12, the upper filter element back-blowing device 10 is arranged in the upper region, the middle filter element back-blowing device 11 is arranged in the middle region, and the lower filter element back-blowing device 12 is arranged in the lower region;
the data collected by the first front side pressure measuring point 1, the second front side pressure measuring point 2 and the third front side pressure measuring point 3 are transmitted to a differential pressure gauge 13;
the data collected by the first rear side pressure measuring point 4, the second rear side pressure measuring point 5 and the third rear side pressure measuring point 6 are also transmitted to the differential pressure gauge 13;
the differential pressure gauge 13 calculates real-time differential pressure before and after the filter element according to the difference between the average value of the data acquired by the front side pressure measuring point 1, the front side pressure measuring point 2 and the front side pressure measuring point 3 and the average value of the data acquired by the rear side pressure measuring point 4, the rear side pressure measuring point 5 and the rear side pressure measuring point 6, and transmits the data to the blowback period calculating module 17 to judge whether the current time is needed for blowback of the air inlet filter element; the blowback period calculation module 17 is connected to the upper computer 19, and the upper computer 19 controls the operation of the filter element blowback device.
The three pitot tubes are respectively an upper pitot tube 7, a middle pitot tube 8 and a lower pitot tube 9, and are sequentially arranged in the corresponding upper region, middle region and lower region from top to bottom; the upper pitot tube 7 is connected to an upper anemometer 16, the middle pitot tube 7 is connected to a middle anemometer 15, and the lower pitot tube 9 is connected to a lower anemometer 14; the upper wind speed tester 16, the middle wind speed tester 15 and the lower wind speed tester 14 are all connected to a blowback area search module 18, and the blowback area search module 18 is connected to an upper computer 19. The air flow velocity v1 of the upper region on the rear side of the filter element 22 is measured by the upper pitot tube 7 and the upper wind speed tester 16; the air flow velocity v2 of the middle region on the rear side of the filter element 22 was measured using the middle pitot tube 8 and the middle velocimeter 15; the air flow velocity v3 of the lower region at the rear side of the filter element 22 is measured by using the lower pitot tube 9 and the lower velocimeter 14, and three air flow velocity values are input into the blowback region searching module 18 for calculation, so that the blocking condition of different regions of the filter element 22 is determined, and the region with serious blocking is determined. Finally, the upper computer 19 can control the filter element blowback device in the specific area to carry out targeted blowback according to the result of the blowback area searching module 18, so that the operation of the blowback system is more economical, reliable and accurate.
Referring to fig. 2, a flowchart of a method for determining the calculation by the blowback period calculation module 17 is shown: firstly, calculating the real-time differential pressure delta p before and after the filter element according to the difference value between the average value of the data acquired by the front side pressure measuring point 1, the front side pressure measuring point 2 and the front side pressure measuring point 3 and the average value of the data acquired by the rear side pressure measuring point 4, the rear side pressure measuring point 5 and the rear side pressure measuring point 6 f ' in combination with the current barometric pressure value p 0 From the known differential pressure delta p between the front and rear of the rated filter element f Calculating the inlet pressure p of the compressor under the pressure difference between the front and the rear of the rated filter element in Compressor inlet pressure p under current actual filter element front-rear pressure difference in '：
p in ＝p 0 -Δp f (1)
p in '＝p 0 -Δp f ' (2)
Therefore, the inlet pressure loss delta p of the compressor caused by the pressure difference between the front and the rear of the current actual filter element in The following are provided:
Δp in ＝p in -p in ' (3)
due to gas turbine inlet, i.e. compressor outlet pressure p out The pressure ratio pi of the rated filter element at the front-back differential pressure is obtained by keeping the pressure at the same value no matter at any inlet pressure c Pressure ratio pi of actual filter element under front-rear pressure difference c '：
Further solving the specific work loss delta W caused by the pressure difference between the front and the rear of the current actual filter element of the air compressor C Specific work W under rated pressure difference C Is the relation of:
where k is the adiabatic index, i.e., the ratio of the specific heat capacity at constant pressure to the specific heat capacity at constant capacity.
The relative amount of change in power is further available:
wherein P is C For rated power of the compressor under differential pressure of front and rear of filter element, delta P C The power loss of the compressor under the differential pressure of the front and the rear of the current actual filter element,the power loss cost delta C of the air compressor can be converted into the power loss cost delta C of the air compressor through electricity price C 。
At the same time, the real-time cost C which is needed to bear if the filter element blowback is carried out from the current moment is calculated s ：
C s ＝qQ r C e (8)
Wherein Q is the compressed air quantity required by back blowing, Q r C for generating the electric quantity required by the compressed air e The power price is the internet.
Finally, comparing the power loss cost delta C of the compressor caused by the front-rear differential pressure of the current filter element C Comprehensive real-time cost C needed to bear with back flushing of filter element s Size of the space, if C s ＞ΔC C The cost of back blowing of the filter element at the current moment is higher than the cost of performance reduction of the air compressor, and the back blowing is unnecessary, so that the process of calculating the above from the beginning at the next moment is started. If C s ≤ΔC C And the fact that the performance reduction cost of the air compressor reaches a critical value or exceeds the real-time comprehensive cost of back flushing of the filter element is indicated, back flushing is needed to be performed immediately, and an instruction signal for back flushing of the filter element is fed back to the upper computer immediately.
At the same time, the air flow velocity v after the upper filter element is compared by the back blowing area searching module 18 1 Air flow velocity v after middle zone filter element 2 Air flow velocity v after lower zone cartridge 3 The minimum value is found out, so that a signal is transmitted to the upper computer 19, and the upper computer 19 selects a filter element blowback device in a corresponding area to carry out targeted blowback on the corresponding area.
A cleaning method of back-blowing cleaning system of air inlet filter element of gas turbine includes calculating to obtain difference between pressure measuring point of front side region of filter element and pressure measuring point of back side region of filter element to measure real-time differential pressure before and after filter element, inputting to back-blowing period calculation module to make calculation and judgment, when power loss cost of air compressor caused by differential pressure before and after current filter element is greater than integrated real-time cost Cs needed to bear by back-blowing of filter element, transmitting signal to upper computer by back-blowing period calculation module 17 at this moment, and meeting time for starting back-blowing control device at this moment; meanwhile, the filter element can be divided into a plurality of areas according to the vertical direction, corresponding filter element blowback devices are arranged in different areas, then the pitot tube and the wind speed velocimeter set in each area are used for measuring the wind speed of the filter element in the different areas, and different flow speed values are input into a blowback area searching module for calculation, so that the area with serious filter element blockage is determined; the upper computer simultaneously combines signals of the blowback period calculation module and the blowback area search module to control the filter element blowback device in the specific area to carry out targeted blowback at the specific time.
Claims (8)
1. The utility model provides a gas turbine inlet filter core blowback clearance system, includes the filter core, the filter core is installed in the filter, and the filter is installed in the air inlet area position of compressor air inlet line, its characterized in that: the filter element back-blowing device comprises a filter element, a back-blowing period calculation module, a control module and a control module, wherein the front side pressure measuring point and the back side pressure measuring point for testing air pressure are arranged on the front side and the back side of the filter element, and the back-blowing period calculation module controls the filter element back-blowing device to act through an upper computer according to the difference value of the data of the front side pressure measuring point and the data of the back side pressure measuring point of the filter element;
the calculation and judgment method of the blowback period calculation module is as follows: firstly, calculating real-time differential pressure delta p of the filter element front and back according to the difference value between the region front side pressure measuring point and the region rear side pressure measuring point f ' in combination with the current barometric pressure value p 0 From the known differential pressure delta p between the front and rear of the rated filter element f Calculating the inlet pressure p of the compressor under the pressure difference between the front and the rear of the rated filter element in Compressor inlet pressure p under current actual filter element front-rear pressure difference in '：
p in ＝p 0 -Δp f (1)
p in '＝p 0 -Δp f ' (2)
Therefore, the inlet pressure loss delta p of the compressor caused by the pressure difference between the front and the rear of the current actual filter element in The following are provided:
Δp in ＝p in -p in ' (3)
due to gas turbine inlet, i.e. compressor outlet pressure p out It is desirable to maintain uniformity at any inlet pressure,thereby obtaining the pressure ratio pi of the rated filter element under the front-back differential pressure c Pressure ratio pi of actual filter element under front-rear pressure difference c '：
Further solving the specific work loss delta W caused by the pressure difference between the front and the rear of the current actual filter element of the air compressor C Specific work W under rated pressure difference C Is the relation of:
wherein k is an adiabatic index, i.e., the ratio of the specific heat capacity at constant pressure to the specific heat capacity at constant capacity; w (W) C Specific work under rated pressure difference;
the relative amount of change in power is further available:
wherein P is C For rated power of the compressor under differential pressure of front and rear of filter element, delta P C The power loss of the compressor under the differential pressure of the front and rear of the current actual filter element can be converted into the power loss cost delta C of the compressor through electricity price C ；
At the same time, the real-time cost C which is needed to bear if the filter element blowback is carried out from the current moment is calculated s ：
C s ＝qQ r C e (8)
Wherein Q is the compressed air quantity required by back blowing, Q r C for generating the electric quantity required by the compressed air e The online electricity price is obtained; finally, comparing the power loss of the compressor caused by the front-rear differential pressure of the current filter elementConsumption cost delta C C Real-time cost C needed to bear with back flushing of filter element s Size of the space, if C s >ΔC C The cost of back blowing of the filter element at the current moment is higher than the cost of performance reduction of the air compressor, and the back blowing is unnecessary, so that the process of calculating the above from the beginning at the next moment is started; if C s ≤ΔC C And the fact that the performance reduction cost of the air compressor reaches a critical value or exceeds the real-time cost of back flushing of the filter element is indicated, back flushing is needed to be performed immediately, and an instruction signal for back flushing of the filter element is fed back to the upper computer immediately.
2. The gas turbine inlet filter cartridge blowback cleaning system of claim 1, wherein: the filter element is divided into a plurality of areas from top to bottom, pressure measuring points are arranged on the front side and the rear side of each area, the data of the front side pressure measuring point is the average value of the pressure measuring point data of each area on the front side of the filter element, and the data of the rear side pressure measuring point is the average value of the pressure measuring point data of each area on the rear side of the filter element.
3. The gas turbine inlet filter cartridge blowback cleaning system of claim 2, wherein: the rear side of the filter element of each region also comprises a Pitot tube and a wind speed tester which are used for measuring the air flow rate behind the filter element of the region, each region is provided with a filter element blowback device corresponding to each region, the Pitot tube and the wind speed tester transmit measured data to a blowback region searching module, and the blowback region searching module controls the filter element blowback devices corresponding to each region to work through an upper computer after judging.
4. A gas turbine inlet filter cartridge blowback cleaning system as recited in claim 3, wherein: the back-blowing area searching module judges that the back-blowing area searching module compares the air flow velocity v1 behind the filter element in the upper part, the air flow velocity v2 behind the filter element in the middle part and the air flow velocity v3 behind the filter element in the lower part, and finds out the minimum value, so that signals are transmitted to the upper computer, and the upper computer selects the filter element back-blowing device in the corresponding area to carry out targeted back-blowing on the corresponding area.
5. A gas turbine inlet filter cartridge blowback cleaning system as claimed in claim 2 or 3 wherein: and the pressure measuring points at the front side and the rear side of each region are transmitted to a blowback period calculation module through a pressure difference meter.
6. A gas turbine inlet filter cartridge blowback cleaning system as recited in claim 3, wherein: the filter element is divided into three areas from top to bottom, namely an upper area, a middle area and a lower area; the front and rear positions of each region of the filter element are respectively provided with a pressure measuring point, and the front side pressure measuring point I and the rear side pressure measuring point I are respectively arranged on the front side and the rear side of the upper region; the front side pressure measurement point II and the rear side pressure measurement point II are respectively arranged on the front side and the rear side of the middle area; front side pressure measuring points III and rear side pressure measuring points III are respectively arranged on the front side and the rear side of the lower region; the rear side of each region of the filter element is provided with a corresponding filter element back-blowing device, the filter element back-blowing device comprises an upper filter element back-blowing device, a middle filter element back-blowing device and a lower filter element back-blowing device, the upper filter element back-blowing device is arranged in the upper region, the middle filter element back-blowing device is arranged in the middle region, and the lower filter element back-blowing device is arranged in the lower region; the blowback period calculation module compares the difference value between the average value of the data acquired by the front side pressure measuring point I, the front side pressure measuring point II and the front side pressure measuring point III and the average value of the data acquired by the rear side pressure measuring point I, the rear side pressure measuring point II and the rear side pressure measuring point III, and respectively controls the filter element blowback device through the upper computer after judgment and calculation.
7. The gas turbine inlet filter cartridge blowback cleaning system of claim 6, wherein: the three pitot tubes are respectively an upper pitot tube, a middle pitot tube and a lower pitot tube, and are sequentially arranged in the corresponding upper region, middle region and lower region from top to bottom; the upper pitot tube is connected to the upper wind speed tester, the middle pitot tube is connected to the middle wind speed tester, and the lower pitot tube is connected to the lower wind speed tester; the upper wind speed tester, the middle wind speed tester and the lower wind speed tester are all connected to a blowback area searching module, and the blowback area searching module is connected to an upper computer.
8. A cleaning method using the gas turbine inlet filter element blowback cleaning system as claimed in any one of claims 1 to 7, wherein: the method mainly comprises the following steps: firstly, calculating to obtain a pressure measuring point of a front side area of a filter element and a pressure measuring point of a rear side area of the filter element, measuring real-time differential pressure of the front and rear sides of the filter element, inputting the differential pressure into a back-flushing period calculation module, and then calculating to obtain the power loss cost delta C of the compressor C The method comprises the steps of carrying out a first treatment on the surface of the When the loss cost of the power of the compressor caused by the front-rear pressure difference of the filter element is larger than the real-time cost Cs needed to bear by the back blowing of the filter element, the back blowing period calculation module transmits signals to the upper computer, and the upper computer controls the filter element back blower device to work.
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| CN109236473A (en) * | 2018-09-26 | 2019-01-18 | 国网河北省电力有限公司电力科学研究院 | Portable cleaning device for gas turbine inlet air filtration system |
| CN113790102B (en) * | 2021-08-31 | 2022-09-13 | 南京瑞华动力科技有限公司 | Intelligent operation and maintenance system of gas turbine air inlet filter |
| CN113623077A (en) * | 2021-09-16 | 2021-11-09 | 四川村田机械制造股份有限公司 | Automatic cleaning device for filter element of gas inlet system of gas turbine |
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