CN107100742B - A method of filter core back-blowing device is controlled using pressure differential method - Google Patents

A method of filter core back-blowing device is controlled using pressure differential method Download PDF

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Publication number
CN107100742B
CN107100742B CN201710438886.1A CN201710438886A CN107100742B CN 107100742 B CN107100742 B CN 107100742B CN 201710438886 A CN201710438886 A CN 201710438886A CN 107100742 B CN107100742 B CN 107100742B
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China
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filter core
pressure
blowback
blowing device
region
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CN107100742A (en
Inventor
许昊煜
阮圣奇
吴仲
宋勇
任磊
王松浩
陈裕
陈开峰
邵飞
蒋怀锋
胡中强
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China Datang Corp Science and Technology Research Institute Co Ltd East China Branch
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China Datang Corp Science and Technology Research Institute Co Ltd East China Branch
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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
    • F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/607—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure
    • F05D2270/3011—Inlet pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure
    • F05D2270/3015—Pressure differential pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a kind of methods using pressure differential method control filter core back-blowing device, key step is as follows: being respectively arranged pressure-measuring-point before and after filter core first, the real-time differential pressure Δ p before and after filter core is calculated according to pressure-measuring-point on front side of region and the difference between the backside pressure measuring point of regionf', according to front and back differential pressure Δ pfThe amount of power dissipation Δ P of currently practical filter core group pre-post difference pressure compressorC, compressor power cost depletions Δ C can be converted to by electricity priceC；If then calculating from current time and carrying out the real-time cost C that filter core blowback needs to undertakes: finally compare Δ CCWith CsBetween size, work as Cs≤ΔCCIt needs to carry out blowback immediately, the command signal for carrying out filter core blowback is fed back into host computer immediately at this time.The period of blowback is accurately calculated the present invention is based on multiple spot pressure difference mensuration and in conjunction with compressor power cost depletions calculation method, opens filter core back-blowing device when needed, avoids waste caused by traditional use periodically turns on.

Description

A method of filter core back-blowing device is controlled using pressure differential method
Technical field
The invention belongs to the operation and maintenance technical applications of gas turbine, specifically, being related to a kind of using pressure differential method The method for controlling filter core back-blowing device.
Background technique
In order to improve the inflow air quality of gas turbine combined cycle power plant unit at runtime, compressor blade is avoided The reduction of unit runnability, is equipped at the compressor inlet of combustion engine caused by surface dirt, efficiency and aeroperformance decline Air filter.With the extension of runing time, compressor air inlet machine strainer screen can be blocked gradually by the particulate matter in air, be drawn Pressure difference will be gradually increased before and after playing strainer screen, be needed periodically back-blowing device to be used to blow off dust stratification, otherwise be will affect air inlet Pressure and flow are to reduce unit economy.But compressed air of the working air current of back-blowing device in power plant, it produces Raw compressed air needs to consume electric energy.Therefore back-blowing device cannot be uninterruptedly used, otherwise huge energy consumption.
Since the filter core that air intake filter is arranged along vertical direction by one group forms, and the particle in air exists It can be easier under the action of gravity and flow field in depositing, being attached to, on the filter core of lower part, therefore with the continuous fortune of unit The degree of row, the filter core blocking of different location is different, and in general, the filter of middle part and lower part is easier to block, and different Area, different model unit filter group in blocking region distribution situation it is often different, but in actual operation, tradition into The back-blowing device of gas filtration system can only be unified due to can not judge to be blocked seriously by the filter core in which region by all filters The fully open carry out blowback of the back-blowing device of core, causes the waste of compressed air and the energy.At the same time, conventional gas introduction filters The back-blowing device of system can not also judge the best opportunity of blowback, can only set regular time and carry out blowback, and blowback is consolidated The determination fixed time is more random, is theoretically unsound, often lead to blowback excessively frequently and waste of energy also or blowback frequency Too low my economy to reduce unit of rate.
Summary of the invention
The present invention provides a kind of method using pressure differential method control filter core back-blowing device, can based on multiple spot pressure difference mensuration So that the acquisition of differential pressure value is more accurate before and after strainer, can accurately be calculated in conjunction with compressor power cost depletions calculation method The period of blowback out opens filter core back-blowing device when needed, avoids wave caused by traditional use periodically turns on Take.
Technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A method of filter core back-blowing device being controlled using pressure differential method, key step is as follows:
Step 1: pressure-measuring-point is respectively arranged before and after filter core, according to pressure-measuring-point on front side of region and region backside pressure Difference between measuring point calculates the real-time differential pressure Δ p before and after filter coref', in conjunction with current atmospheric pressure force value p0, by known specified Differential pressure Δ p before and after filter core groupfCalculate the compressor intake pressure p under the pressure difference of specified filter core group front and backinAnd currently practical filter Compressor intake pressure p before and after core group under pressure differencein'；According to front and back differential pressure Δ pfCalculate currently practical filter core group pre-post difference Depress the amount of power dissipation Δ P of compressorC, compressor power cost depletions Δ C can be converted to by electricity priceC；
If carrying out the real-time cost C that filter core blowback needs to undertake step 2: calculating from current times:
Cs=qQrCe
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network；
Step 3: comparison compressor power cost depletions Δ C as caused by differential pressure before and after current filter core groupCWith filter core blowback The real-time cost C of the synthesis for needing to undertakesBetween size, if Cs> Δ CC, then illustrate the cost ratio of current time filter core blowback The cost of Capability of Compressor decline is higher, temporarily unnecessary to carry out blowback, then enters next moment, mistake more than ab iitio Journey；If Cs≤ΔCC, then illustrate that Capability of Compressor decline cost reaches critical value or has been more than the real-time comprehensive of filter core group blowback Synthesis originally, needs to carry out blowback immediately, and the command signal for carrying out filter core blowback is fed back to host computer immediately at this time.
As further technical solution of the invention: the compressor power cost depletions Δ CCSpecific algorithm is as follows: The real-time differential pressure before and after filter core is calculated according to pressure-measuring-point on front side of region and the difference between the backside pressure measuring point of region first Δpf', in conjunction with current atmospheric pressure force value p0, by differential pressure Δ p before and after known specified filter core groupfCalculate specified filter core group front and back Compressor intake pressure p under pressure differenceinAnd the compressor intake pressure p before and after currently practical filter core group under pressure differencein':
pin=p0-Δpf (1)
pin'=p0-Δpf' (2)
Then the compressor intake pressure as caused by pressure difference before and after currently practical filter core group loses Δ pinIt is as follows:
Δpin=pin-pin' (3)
Due to gas turbine inlet, that is, compressor delivery pressure poutNo matter holding one is required under any inlet pressure It causes, thus obtains the pressure ratio π of specified filter core group pre-post difference pressurecAnd the pressure ratio π before and after practical filter core group under pressure differencec':
It further seeks losing Δ W than function caused by the currently practical filter core group front and back pressure difference of compressorCUnder rated differential head Than function WCRelationship:
Wherein k is adiabatic exponent, i.e. the ratio between specific heat at constant pressure and specific heat at constant volume；
The relative variation of power further can be obtained:
Wherein PCThe power of compressor, Δ P are depressed for specified filter core group pre-post differenceCFor differential pressure before and after currently practical filter core group The amount of power dissipation of lower compressor can be converted to compressor power cost depletions Δ C by electricity priceC；
If then calculating from current time and carrying out the real-time cost C that filter core blowback needs to undertakes:
Cs=qQrCe (8)
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network.
As further technical solution of the invention: the filter core is divided into several regions from top to bottom, before each region Two sides are provided with pressure-measuring-point, average value and filter of the blowback period computing module according to areal pressure measuring point each on front side of filter core afterwards The mean value calculation of each areal pressure measuring point goes out differential pressure before and after filter core group on rear side of core.
As further technical solution of the invention: further including for measuring this on rear side of the filter core in each region The Pitot tube and wind speed tester of air velocity after the filter core of region, and there is corresponding filter core back-blowing device in each region, The data of measurement are passed to blowback range searching module by Pitot tube and wind speed tester, are led to after the judgement of blowback range searching module Cross the corresponding filter core back-blowing device work in each region of PC control.
As further technical solution of the invention: the blowback range searching module deterministic process is as follows, blowback area Air velocity v1, the air velocity v2 after central region filter core and lower area filter after domain search module comparison top filter core Air velocity v3 after core, finds out minimum value therein, so that signal is passed to host computer, the corresponding region of upper computer selecting Filter core back-blowing device to corresponding region carry out pointedly blowback.
As further technical solution of the invention: the pressure-measuring-point of side passes through differential manometer before and after described each region It is connected to blowback period computing module.
As further technical solution of the invention: the filter core is divided into three regions, respectively top from top to bottom Region, central region and lower area；The front-rear position in each region of filter core is mounted on pressure-measuring-point, the upper area Front and rear sides be respectively front side pressure-measuring-point one and backside pressure measuring point one；Before the front and rear sides of the central region are respectively Lateral pressure measurement two and backside pressure measuring point two；The front and rear sides of the lower area are respectively arranged with front side three He of pressure-measuring-point Backside pressure measuring point three；It is mounted on corresponding filter core back-blowing device on rear side of each region of filter core, the filter core is anti- Blowing apparatus includes top filter core back-blowing device, middle part filter core back-blowing device and lower part filter core back-blowing device, top filter core blowback dress It sets and is mounted on upper area, middle part filter core back-blowing device is mounted on central region, and lower part filter core back-blowing device is mounted on lower region Domain；Blowback period computing module compares the front side pressure-measuring-point one, front side pressure-measuring-point two and front side pressure-measuring-point three and acquires The average value of data and backside pressure measuring point one, backside pressure measuring point two and backside pressure measuring point three acquire data average value it Between difference, and carry out controlling filter core back-blowing device respectively by host computer after judgement calculating.
As further technical solution of the invention: there are three the Pitot tube is arranged altogether, be respectively top Pitot tube, Middle part Pitot tube and lower part Pitot tube, three Pitot tubes be sequentially arranged at from top to bottom corresponding upper area, central region and Lower area；Top Pitot tube is connected to top wind speed tester, and middle part Pitot tube is connected to middle part wind speed tester, lower part skin Trustship is connected to lower part wind speed tester；Top wind speed tester, middle part wind speed tester and lower part wind speed tester are all connected with To blowback range searching module, blowback range searching module is connected to host computer.
Beneficial effect
Compared with the prior art, the invention has the benefit that
1) the present invention is based on multiple spot pressure difference mensurations may make the acquisition of strainer front and back differential pressure value more accurate, can combine The period of blowback is accurately calculated in compressor power cost depletions calculation method, opens filter core back-blowing device when needed It opens, avoids waste caused by traditional use periodically turns on.
2) present invention is measured based on multi-point flux simultaneously, and the filter core blocking that can find out which part in filter core group is serious Unit operation is influenced, to targetedly carry out blowback to the part filter core.It is complete so as to avoid conventional bowl back-blowing device The method of operation opened reduces loss, has saved the energy.
Detailed description of the invention
Fig. 1 is a kind of structure of the cleaning system for the method that filter core back-blowing device is controlled using pressure differential method of the embodiment of the present invention Schematic diagram.
Fig. 2 is a kind of flow diagram for the method that filter core back-blowing device is controlled using pressure differential method of the embodiment of the present invention.
In figure: 1- pressure-measuring-point one, 2- pressure-measuring-point two, 3- pressure-measuring-point three, 4- pressure-measuring-point four, 5- pressure-measuring-point Five, 6- pressure-measuring-point six, the top 7- Pitot tube, the middle part 8- Pitot tube, the lower part 9- Pitot tube, the top 10- filter core back-blowing device, Filter core back-blowing device in the middle part of 11-, the lower part 12- filter core back-blowing device, 13- differential manometer, the lower part 14- wind speed tester, the middle part 15- wind Fast tester, the top 16- wind speed tester, 17- blowback period computing module, 18- blowback range searching module, 19- host computer, 20- admission line, 21- air intlet, 22- filter.
Specific embodiment
Present invention will now be described in detail with reference to the accompanying drawings..
Described front side indicates the left side of Fig. 1 herein, and rear side indicates the right side of Fig. 1；
As shown in Figure 1, a kind of method using pressure differential method control filter core back-blowing device, key step are as follows: step 1: It is respectively arranged pressure-measuring-point before and after filter core 22, according to pressure-measuring-point on front side of region and the difference between the backside pressure measuring point of region Calculate the real-time differential pressure Δ p of 22 front and back of filter coref', in conjunction with current atmospheric pressure force value p0, by 22 groups of front and backs of known specified filter core Differential pressure Δ pfCalculate the compressor intake pressure p under 22 groups of front and back pressure differences of specified filter coreinAnd before currently practical 22 groups of filter core Compressor intake pressure p under pressure difference afterwardsin'；According to front and back differential pressure Δ pfCalculate the 22 groups of pre-post difference pressures of currently practical filter core The amount of power dissipation Δ P of compressorC, compressor power cost depletions Δ C can be converted to by electricity priceC；
If carrying out the real-time cost C that 22 blowback of filter core needs to undertake step 2: calculating from current times:
Cs=qQrCe
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network；
Step 3: comparison compressor power cost depletions Δ C as caused by 22 groups of front and back differential pressures of current filter coreCWith filter core 22 Blowback needs the real-time cost C of synthesis undertakensBetween size, if Cs> Δ CC, then illustrate 22 blowback of current time filter core Cost is higher than the cost that Capability of Compressor declines, temporarily unnecessary to carry out blowback, then enters next moment, more than ab iitio Process；If Cs≤ΔCC, then illustrate that Capability of Compressor decline cost reaches critical value or has been more than 22 groups of blowbacks of filter core Real time comprehensive cost needs to carry out blowback immediately, and the command signal for carrying out 22 blowback of filter core is fed back to host computer immediately at this time.
The compressor power cost depletions Δ CCSpecific algorithm is as follows: first according to pressure-measuring-point on front side of region and region Difference between backside pressure measuring point calculates the real-time differential pressure Δ p of 22 front and back of filter coref', in conjunction with current atmospheric pressure force value p0, by 22 groups of front and back differential pressure Δ p of known specified filter corefCalculate the compressor intake pressure p under 22 groups of front and back pressure differences of specified filter corein And the compressor intake pressure p under currently practical 22 groups of front and back pressure differences of filter corein':
pin=p0-Δpf (1)
pin'=p0-Δpf' (2)
Then the compressor intake pressure as caused by 22 groups of front and back pressure differences of currently practical filter core loses Δ pinIt is as follows:
Δpin=pin-pin' (3)
Due to gas turbine inlet, that is, compressor delivery pressure poutNo matter holding one is required under any inlet pressure It causes, thus obtains the pressure ratio π of 22 groups of pre-post differences of specified filter core pressurecAnd the pressure ratio π under practical 22 groups of front and back pressure differences of filter corec':
It further seeks losing Δ W than function caused by 22 groups of front and back pressure differences of the currently practical filter core of compressorCWith rated differential head It is lower than function WCRelationship:
Wherein k is adiabatic exponent, i.e. the ratio between specific heat at constant pressure and specific heat at constant volume；
The relative variation of power further can be obtained:
Wherein PCThe power of compressor, Δ P are depressed for 22 groups of pre-post differences of specified filter coreCFor 22 groups of front and backs of currently practical filter core The amount of power dissipation of compressor under differential pressure can be converted to compressor power cost depletions Δ C by electricity priceC；
If then calculating from current time and carrying out the real-time cost C that 22 blowback of filter core needs to undertakes:
Cs=qQrCe (8)
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network.
The filter core 22 is mounted in filter, and filter is mounted on the air inlet region 21 of compressor air inlet machine pipeline 20 Position, the filter core 22 are divided into three regions, respectively upper area, central region and lower area from top to bottom；Filter core 22 The front-rear position in each region be mounted on pressure-measuring-point, the front and rear sides of the upper area are respectively front side pressure-measuring-point One 1 and backside pressure measuring point 1；The front and rear sides of the central region are respectively that front side piezometry 22 and backside pressure are surveyed Point 25；The front and rear sides of the lower area are respectively arranged with front side pressure-measuring-point 33 and backside pressure measuring point 36；
Corresponding filter core back-blowing device, the filter core back-blowing device are mounted on rear side of each region of the filter core 22 Including top filter core back-blowing device 10, middle part filter core back-blowing device 11 and lower part filter core back-blowing device 12, top filter core blowback dress It sets 10 and is mounted on upper area, middle part filter core back-blowing device 11 is mounted on central region, and lower part filter core back-blowing device 12 is mounted on Lower area；
The data transmission that the front side pressure-measuring-point 1, front side pressure-measuring-point 22 and front side pressure-measuring-point 33 acquire arrives Differential manometer 13；
The data that the backside pressure measuring point 1, backside pressure measuring point 25 and backside pressure measuring point 36 acquire also transmit To differential manometer 13；
Differential manometer 13 acquires data according to front side pressure-measuring-point 1, front side pressure-measuring-point 22 and front side pressure-measuring-point 33 Average value and backside pressure measuring point 1, backside pressure measuring point 25 and backside pressure measuring point 36 acquire data average value it Between difference calculate the real-time differential pressure before and after filter core, and transfer data to judgement after blowback period computing module 17 and calculate and work as Whether the preceding time needs to carry out air inlet filter core blowback；The blowback period computing module 17 is connected to host computer 19, host computer 19 Control the operating of filter core back-blowing device.
It is top Pitot tube 7, middle part Pitot tube 8 and lower part Pitot tube 9 respectively there are three the Pitot tube is arranged altogether, three A Pitot tube is sequentially arranged at corresponding upper area, central region and lower area from top to bottom；Top Pitot tube 7 is connected to Top wind speed tester 16, middle part Pitot tube 7 are connected to middle part wind speed tester 15, and lower part Pitot tube 9 is connected to lower part wind speed Tester 14；Top wind speed tester 16, middle part wind speed tester 15 and lower part wind speed tester 14 are connected to blowback region Search module 18, blowback range searching module 18 are connected to host computer 19.Pass through top Pitot tube 7 and top wind speed tester 16 Measure the air velocity v1 in 22 upper back region of filter core；After Pitot tube 8 and middle part tachymeter 15 measure filter core 22 in the middle part of use The air velocity v2 in middle side part region；22 back lower region of filter core is measured using lower part Pitot tube 9 and lower part tachymeter 14 Air velocity v3 calculates three air velocity value input blowback range searching modules 18, so that it is determined that filter core 22 is different The stopping state in region determines and blocks serious region.Final host computer 19 can be according to the knot of blowback range searching module 18 The filter core back-blowing device that fruit controls specific region carries out targeted blowback so that the operation of blowback system it is more economical, can It leans on, accurately.
Air velocity v after comparing top filter core by blowback range searching module 181, air after central region filter core Flow velocity v2And the air velocity v after lower area filter core3, minimum value therein is found out, so that signal is passed to host computer 19, host computer 19 selects the filter core back-blowing device in corresponding region to carry out pointedly blowback to corresponding region.
A kind of working principle of the cleaning system using the method using pressure differential method control filter core back-blowing device is as follows, first The difference of pressure-measuring-point and filter core posterior region pressure-measuring-point that filter core front area is calculated measures the reality before and after filter core group When differential pressure, carry out calculating judgement after inputting blowback period computing module 17, cimpressor work caused by pressure difference before and after current filter core group When rate cost depletions are greater than filter core blowback and need the synthesis that undertakes real-time cost Cs, the period of blowback at this time computing module 17 is by signal Host computer is passed to, meets the time of starting blowback control device at this time；Filter core can be divided into according to vertical direction simultaneously multiple Region, and corresponding filter core back-blowing device is installed in different zones, the Pitot tube and wind then set using each region Fast tachymeter measures the wind speed after different zones filter core, and value different in flow rate input blowback range searching module is calculated, from And it determines filter core and blocks serious region；Host computer is in combination with blowback period computing module 17 and blowback range searching module Filter core blowback device device of the signal in specific time control specific region carries out targeted blowback.

Claims (8)

1. a kind of method using pressure differential method control filter core back-blowing device, it is characterised in that: its key step is as follows:
Step 1: pressure-measuring-point is respectively arranged before and after filter core, according to pressure-measuring-point on front side of region and region backside pressure measuring point Between difference calculate the real-time differential pressure Δ p before and after filter coref', in conjunction with current atmospheric pressure force value p0, by known specified filter core Group front and back differential pressure Δ pfCalculate the compressor intake pressure p under the pressure difference of specified filter core group front and backinAnd currently practical filter core group Compressor intake pressure p under the pressure difference of front and backin'；According to front and back differential pressure Δ pfCalculate currently practical filter core group pre-post difference pressure The amount of power dissipation Δ P of compressorC, compressor power cost depletions Δ C can be converted to by electricity priceC；
If carrying out the real-time cost C that filter core blowback needs to undertake step 2: calculating from current times:
Cs=qQrCe
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network；
Step 3: comparison compressor power cost depletions Δ C as caused by differential pressure before and after current filter core groupCIt is needed with filter core blowback The real-time cost C undertakensBetween size, if Cs> Δ CC, then illustrate the cost of current time filter core blowback than compressor property The cost that can decline is higher, temporarily unnecessary to carry out blowback, then enters next moment, process more than ab iitio；If Cs ≤ΔCC, then illustrate that Capability of Compressor decline cost reaches critical value or has been more than the real time comprehensive cost of filter core group blowback, It needs to carry out blowback immediately, the command signal for carrying out filter core blowback is fed back into host computer immediately at this time.
2. a kind of method using pressure differential method control filter core back-blowing device according to claim 1, which is characterized in that described Compressor power cost depletions Δ CCSpecific algorithm is as follows: first according to pressure-measuring-point on front side of region and region backside pressure measuring point Between difference calculate the real-time differential pressure Δ p before and after filter coref', in conjunction with current atmospheric pressure force value p0, by known specified filter core Group front and back differential pressure Δ pfCalculate the compressor intake pressure p under the pressure difference of specified filter core group front and backinAnd currently practical filter core group Compressor intake pressure p under the pressure difference of front and backin':
pin=p0-Δpf (1)
pin'=p0-Δpf' (2)
Then the compressor intake pressure as caused by pressure difference before and after currently practical filter core group loses Δ pinIt is as follows:
Δpin=pin-pin' (3)
Due to gas turbine inlet, that is, compressor delivery pressure poutNo matter require to be consistent under any inlet pressure, Thus the pressure ratio π of specified filter core group pre-post difference pressure is obtainedcAnd the pressure ratio π before and after practical filter core group under pressure differencec':
It further seeks losing Δ W than function caused by the currently practical filter core group front and back pressure difference of compressorCWith under rated differential head than function WC Relationship:
Wherein k is adiabatic exponent, i.e. the ratio between specific heat at constant pressure and specific heat at constant volume；
The relative variation of power further can be obtained:
Wherein PCThe power of compressor, Δ P are depressed for specified filter core group pre-post differenceCIt depresses and presses for currently practical filter core group pre-post difference The amount of power dissipation of mechanism of qi can be converted to compressor power cost depletions Δ C by electricity priceC；
If then calculating from current time and carrying out the real-time cost C that filter core blowback needs to undertakes:
Cs=qQrCe (8)
Wherein q is air supply needed for blowback, QrFor electricity needed for generation compressed air, CeFor rate for incorporation into the power network.
3. the method according to claim 2 using pressure differential method control filter core back-blowing device, it is characterised in that: the filter core It is divided into several regions from top to bottom, each region front and rear sides are provided with pressure-measuring-point, and the blowback period, computing module was according to filter The mean value calculation of each areal pressure measuring point goes out before and after filter core group on rear side of the average value and filter core of each areal pressure measuring point on front side of core Differential pressure.
4. the method according to claim 3 using pressure differential method control filter core back-blowing device, it is characterised in that: described each It further include the Pitot tube and wind speed tester for measuring the air velocity after the region filter core on rear side of the filter core in region, and every A region has corresponding filter core back-blowing device, Pitot tube and wind speed tester that the data of measurement are passed to blowback region to search Rope module passes through the corresponding filter core back-blowing device work in each region of PC control after the judgement of blowback range searching module.
5. the method according to claim 4 using pressure differential method control filter core back-blowing device, it is characterised in that: the blowback Range searching module deterministic process is as follows, air velocity v1, central region after blowback range searching module comparison top filter core The air velocity v3 after air velocity v2 and lower area filter core after filter core, finds out minimum value therein, thus by signal Host computer is passed to, the filter core back-blowing device in the corresponding region of upper computer selecting carries out pointedly blowback to corresponding region.
6. the method according to claim 4 using pressure differential method control filter core back-blowing device, it is characterised in that: described each The pressure-measuring-point of region front and back side passes through differential manometer and is transferred to blowback period computing module.
7. the method according to claim 4 using pressure differential method control filter core back-blowing device, it is characterised in that: the filter core It is divided into three regions, respectively upper area, central region and lower area from top to bottom；The anteroposterior position in each region of filter core It sets and is mounted on pressure-measuring-point, the front and rear sides of the upper area are respectively front side pressure-measuring-point one and backside pressure measuring point One；The front and rear sides of the central region are respectively front side piezometry two and backside pressure measuring point two；The lower area Front and rear sides are respectively arranged with front side pressure-measuring-point three and backside pressure measuring point three；It is respectively mounted on rear side of each region of filter core There is corresponding filter core back-blowing device, the filter core back-blowing device includes top filter core back-blowing device, middle part filter core back-blowing device With lower part filter core back-blowing device, top filter core back-blowing device is mounted on upper area, and middle part filter core back-blowing device is mounted on middle part Region, lower part filter core back-blowing device are mounted on lower area；Blowback period computing module compares the front side pressure-measuring-point one, preceding Lateral pressure measuring point two and front side pressure-measuring-point three acquire data average value and backside pressure measuring point one, backside pressure measuring point two and Backside pressure measuring point three acquires the difference between the average value of data, and carries out controlling filter respectively by host computer after judgement calculating Core back-blowing device.
8. the method according to claim 7 using pressure differential method control filter core back-blowing device, it is characterised in that: the skin support Pipe is altogether top Pitot tube, middle part Pitot tube and lower part Pitot tube respectively there are three settings, and three Pitot tubes are from top to bottom successively It is mounted on corresponding upper area, central region and lower area；Top Pitot tube is connected to top wind speed tester, middle part skin Trustship is connected to middle part wind speed tester, and lower part Pitot tube is connected to lower part wind speed tester；Top wind speed tester, middle part wind Fast tester and lower part wind speed tester are connected to blowback range searching module, and blowback range searching module is connected to upper Machine.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611700A1 (en) * 1986-04-08 1987-10-15 Hoelter Heinz Process for cleaning off a hot gas filter
CN1233748A (en) * 1999-04-20 1999-11-03 项家从 Method for continuous back-flushing cleaning in differntial pressure type flow measuring system
CN1995927A (en) * 2006-12-08 2007-07-11 鞍钢股份有限公司 Blasting type back flushing method
CN201482298U (en) * 2009-08-27 2010-05-26 浙江华友钴业股份有限公司 Backflushing system of ceramic filter
CN105201652A (en) * 2015-10-26 2015-12-30 李世銮 Air filter for compressor and gas turbine
CN105903287A (en) * 2016-06-21 2016-08-31 天津宜诺医药工业设计有限公司 Back flushing device for fluidized granulator filter and back flushing method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611700A1 (en) * 1986-04-08 1987-10-15 Hoelter Heinz Process for cleaning off a hot gas filter
CN1233748A (en) * 1999-04-20 1999-11-03 项家从 Method for continuous back-flushing cleaning in differntial pressure type flow measuring system
CN1995927A (en) * 2006-12-08 2007-07-11 鞍钢股份有限公司 Blasting type back flushing method
CN201482298U (en) * 2009-08-27 2010-05-26 浙江华友钴业股份有限公司 Backflushing system of ceramic filter
CN105201652A (en) * 2015-10-26 2015-12-30 李世銮 Air filter for compressor and gas turbine
CN105903287A (en) * 2016-06-21 2016-08-31 天津宜诺医药工业设计有限公司 Back flushing device for fluidized granulator filter and back flushing method thereof

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