A kind of combustion engine self-cleaning air intake filter blowback Performance Appraisal System and method
Technical field
The invention patent relates to combustion engine air intake filtration system regions, and in particular to a kind of combustion engine self-cleaning inlet air filtration
Device blowback Performance Appraisal System and method can extend to using fields such as rotating machinery, the HVAC of general ventilation filter.
Background technique
Filter type used in combustion engine inlet air filter system mainly includes static plate frame filter and self-cleaning cylinder
Formula filter.According to compressor running environment and to the specific requirement of air quality, modern gas turbines inlet air filter system one
Well matched quiet, the dynamic filter for setting multistage different filter efficiencies.Under normal circumstances, the pollutant that gas handling system is crossed in air filtering contains
Amount is gradually increased with the growth of runing time, and intake resistance and filter efficiency is caused to gradually rise.In order to reduce air inlet pressure
Influence of the difference to gas turbine performance will do it replacement when static filter reaches default maximum resistance, for dynamic filter,
Certain flow can be sprayed by Pulse anti-blow device and the compressed air of pressure carries out blowback, blown off and adhered in the filter
The pollutants such as dust promote to restore to lower resistance.GTCC power plant network operator sets according to filter resistance and inlet air humidity etc.
The control strategy for determining pulse backblowing or not timing progress blowback in operation, slow down the week that resistance reaches whole resistance to a certain degree
Phase extends service life.
Dynamic cartridge filter has obtained a large amount of application in plant gas.However it is referred to for dynamic cartridge filter
The general evaluation of the performances such as international standard ISO16890 etc., only resistance, efficiency and dust containing capacity, lacks to dynamic barrel type filtering
The evaluation test method of (efficiency change, resistance recovery etc.) performance superiority and inferiority of device, during practical blowback, filter resistance is extensive
The failure phenomenons such as multiple degree difference is larger, and resistance is constant or filter is damaged happen occasionally, and how to evaluate and select to combustion engine user
Puzzlement is caused with dynamic cartridge filter.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of combustion engine self-cleaning air intake filter blowback performance
Evaluation system and method are restored and the relationship ratings filter blowback performance of blowback flow parameter by quantization filter resistance
Superiority and inferiority.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of combustion engine self-cleaning air intake filter blowback Performance Appraisal System, including between the testing stand static pressure that is sequentially communicated,
Upstream pipeline section, tested filter installation pipeline section and downstream pipeline section;Front end filter, hair dirt device are equipped between the testing stand static pressure
With upstream humiture measurement mechanism, it is internally provided with air humidifying device;Be equipped in the upstream pipeline section upstream pressure measuring point and
Upstream corpuscular counter;The device for installing tested filter is equipped in the tested filter installation pipeline section;The downstream
The interior Pulse anti-blow device being equipped with for carrying out blowback to the tested filter being mounted in tested filter installation pipeline section of pipeline section,
Downstream humiture measurement mechanism, downstream pressure measuring point, downstream particulate counter, terminal filter and blower.
Preferably, the tested filter is dynamic cartridge filter.
It is highly preferred that the Pulse anti-blow device includes the controller of pulse backblowing nozzle and control blowback air-flow, pulse
Blowback nozzle is installed in the pipeline section of downstream.
It is highly preferred that the blower is axial flow blower.
It is highly preferred that the hair dirt device and upstream humiture measurement mechanism are set in testing stand static pressure and upstream pipeline section
The exit of connection.
It is highly preferred that front end filter is set to inlet between testing stand static pressure.
It is highly preferred that the upstream pipeline section, tested filter installation pipeline section and downstream pipeline section are square air channel pipeline section.
It is highly preferred that the nominal internal diameter of the tested filter installation pipeline section is 616mm~622mm.
It is highly preferred that the length of the tested filter installation pipeline section is not less than 1.1 times of the filter depth.
It is highly preferred that the pipeline at tested filter is transparent material.
A kind of combustion engine self-cleaning air intake filter blowback method of evaluating performance using above-mentioned evaluation system is hindered by building
The composite evaluation function of power recovery coefficient and efficiency retention coefficient evaluates the blowback performance of tested filter, comprising steps of
(1) air parameter in adjustment setting testing stand static pressure, including air themperature, relative humidity, pressure, air are close
Degree;
(2) measure initial resistance of filter and filter efficiency: Selection experiment air quantity measures initial resistance of filter P under the air quantity0
With the filter efficiency η based on 0.4 μm of partial size of dioctyl sebacate aerosol0;
(3) hold dirt test: selection manmade dust, with 140mg/m3Concentration be sent to tested filter, filter resistance is with people
Work dirt constantly accumulates on tested filter and is increased, and resistance rises to whole resistance PfWhen, stop hair dirt;P in this methodf=P0+
300Pa, measuring the filter efficiency under whole resistance is ηf;
(4) pulse backblowing is tested: setting Pulse anti-blow device parameter progress blowback, pulse backblowing gas pressure 0.8MPa,
Pulse width 0.2 second, the pulse spacing 30 seconds;Filter resistance value after record blowback 1 time is PC1, second of blowback is carried out, and
Filter resistance value after recording blowback is PC2, third time blowback is carried out, and recording the filter resistance value after blowback is PC3;
(5) measure blowback after-filter filter efficiency: tested filter is to 0.4 μm of dioctyl sebacate aerosol after blowback
The filter efficiency η of partial sizeC;
(6) blowback performance evaluation:
Resistance recovery coefficient is defined as the resistance after tested filter blowback and initial resistance difference and increases resistance with dirt is held
Ratio, calculation formula are as follows:
Efficiency retention coefficient is defined as the efficiency after tested filter blowback and just ratio of the effect difference with appearance dirt raising efficiency
Value, calculation formula are as follows:
Evaluation index vector is x=(x1,x2)T, index weights vector is w=(w1,w2)T, thus construct overall merit letter
Number is y=f (w, x), in which:
w1For resistance recovery coefficient weighted value, w2For efficiency retention coefficient weighted value, using subjective weighting method, i.e., according to by
The subjective attention degree to two valence indexs of filter user is tried to determine its weight coefficient, w1+w2=1.
The utility model has the advantages that
Dynamic filter blowback performance test evaluation method proposed by the present invention belongs to be proposed for the first time, this method and device
Adjustable inlet air temperature and humidity, deliming performance when evaluation dynamic cartridge filter is run in different humidity environment;Together
When can change Pulse anti-blow device structure and adjustment design parameter, provided for research trends cartridge filter scientific and reasonable
Method has filled up the blank of dynamic cartridge filter evaluation method and test device field.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of combustion engine self-cleaning air intake filter blowback Performance Appraisal System;
Wherein: 1, between testing stand static pressure;2, upstream pipeline section;3, tested filter installs pipeline section;4, downstream pipeline section;5, front end
Filter;6, upstream humiture measurement mechanism;7, dirt device is sent out;8, air humidifying device;9, upstream pressure measuring point;10, dynamic
Cartridge filter;11, Pulse anti-blow device;12, downstream humiture measurement mechanism;13, downstream pressure measuring point;14, end filtration
Device;15, blower;16, upstream corpuscular counter;17, downstream particulate counter;.
Specific embodiment
It is specific with reference to the accompanying drawings and examples to introduce essentiality content of the present invention, but guarantor of the invention is not limited with this
Protect range.
Embodiment 1:
A kind of combustion engine self-cleaning air intake filter blowback Performance Appraisal System, including 1 between the testing stand static pressure that is sequentially communicated,
Upstream pipeline section 2, tested filter installation pipeline section 3 and downstream pipeline section 4;1 is equipped with front end filter 5, hair dirt dress between testing stand static pressure
7 and upstream humiture measurement mechanism 6 are set, air humidifying device 8 is internally provided with;Upstream pressure measuring point 9 is equipped in upstream pipeline section 2
With upstream corpuscular counter 16;The device for installing dynamic cartridge filter 10 is equipped in tested filter installation pipeline section 3;Under
The arteries and veins for carrying out blowback to the dynamic cartridge filter 10 being mounted in tested filter installation pipeline section 3 is equipped in play pipe section 4
Rush back-blowing device 11, downstream humiture measurement mechanism 12, downstream pressure measuring point 13, downstream particulate counter 17, terminal filter
14 and blower 14.Wherein, Pulse anti-blow device includes the controller of pulse backblowing nozzle and control blowback air-flow, pulse backblowing spray
Mouth is installed in the pipeline section of downstream;Blower is axial flow blower;It sends out dirt device and upstream humiture measurement mechanism is set to testing stand static pressure
The interior exit being connected to upstream pipeline section;Front end filter is set to inlet between testing stand static pressure;Upstream pipeline section, tested filtering
It is square air channel pipeline section that device, which installs pipeline section and downstream pipeline section, the nominal internal diameter of tested filter installation pipeline section be 616mm~
622mm, the length of tested filter installation pipeline section are not less than 1.1 times of filter depth.Pipeline at tested filter is
Bright material, convenient for observation.
A kind of combustion engine self-cleaning air intake filter blowback method of evaluating performance using above-mentioned evaluation system is hindered by building
The composite evaluation function of power recovery coefficient and efficiency retention coefficient evaluates the blowback performance of tested filter, comprising steps of
(1) air parameter in adjustment setting testing stand static pressure: this method selects on the basis of standard air state, it may be assumed that
Temperature is 20 DEG C, density p=1.185kg/m of relative humidity 65%, pressure 0.1MPa, air3;
(2) measure initial resistance of filter and filter efficiency: this method Selection experiment air quantity is 2500m3/ h measures the air quantity
Lower initial resistance of filter P0With the filter efficiency η for being based on 0.4 μm of partial size of DEHS (dioctyl sebacate) aerosol0;
(3) hold dirt test: using L2 manmade dust as defined in ISO 15957, with 140mg/m3Concentration be sent to tested filtering
Device, filter resistance constantly accumulate on tested filter with manmade dust and are increased, and resistance rises to whole resistance PfWhen, stop hair
Dirt;P in this methodf=P0+ 300Pa, measuring the filter efficiency under whole resistance is ηf;
(4) pulse backblowing is tested: setting Pulse anti-blow device parameter progress blowback, pulse backblowing gas pressure 0.8MPa,
Pulse width 0.2 second, the pulse spacing 30 seconds;Filter resistance value after record blowback 1 time is PC1, second of blowback is carried out, and
Filter resistance value after recording blowback is PC2, third time blowback is carried out, and recording the filter resistance value after blowback is PC3;
(5) measure blowback after-filter filter efficiency: tested filter is to 0.4 μm of dioctyl sebacate aerosol after blowback
The filter efficiency η of partial sizeC;
(6) blowback performance evaluation:
Resistance recovery coefficient is defined as the resistance after tested filter blowback and initial resistance difference and increases resistance with dirt is held
Ratio, calculation formula are as follows:
Efficiency retention coefficient is defined as the efficiency after tested filter blowback and just ratio of the effect difference with appearance dirt raising efficiency
Value, calculation formula are as follows:
Evaluation index vector is x=(x1,x2)T, index weights vector is w=(w1,w2)T, thus construct overall merit letter
Number is y=f (w, x), in which:
w1For resistance recovery coefficient weighted value, w2For efficiency retention coefficient weighted value, using subjective weighting method, i.e., according to by
The subjective attention degree to two valence indexs of filter user is tried to determine its weight coefficient, w1+w2=1.
Embodiment 2:
Using horizontal test bed of the present invention, filter A to be evaluated is horizontal positioned.Indoor intake air temperature is 20 DEG C,
Relative humidity control is 80%, sets vent flow as 2500m3/h。
(1) filter is tested to prepare
It requires that filter A is installed on testing stand according to testing standard, sky blows 15min, filter and various normal mountings
Frame should with air duct excellent sealing, to prevent dust from leaking.
(2) initial resistance, efficiency test
Initial resistance test is done to filter first, is recorded under 25%, 50%, 75%, 100% and 125% nominal air delivery
Initial resistance value, draw resistance and air quantity relation curve.By atmospheric density 1.20kg/m3The case where resistance readings are repaired
Just.Measuring initial resistance of filter is 180Pa.
Then efficiency test is done to sample, opens DEHS aerosol, use 0.4um before and after corpuscular counter testing filters
Population, calculate filter efficiency of the filter under nominal air delivery, measuring filter and just imitating is 75%.Close aerosol and grain
Sub-count equipment.
(3) hold dirt test.It opens hair dirt equipment and tested filter, mistake is sent to concentration 140mg/m3 using L2 manmade dust
Filter Resistance constantly accumulates on tested filter with load dirt and is increased.When resistance rises to whole resistance 480Pa, stop hair
Dirt.
(4) aerosol and particle counting equipment are opened, measuring filter efficiency is 98.5%.
(5) pulse backblowing.Pulse cleaning system is opened, applying 0.8MPa pulse width under nominal air delivery to sample is
The blowback air-flow of 0.2s, blowback first time after-filter resistance are 320pa, and resistance is 300Pa, blowback third after second of blowback
Resistance is 300pa after secondary.
(6) efficiency test.Aerosol and particle counting equipment are opened in filter blowback, and measuring filter efficiency is 89.6%.
Partial size (μm) |
Efficiency before blowback |
Blowback behind efficiency |
0.346 |
98.2 |
87.9 |
0.4 |
98.5 |
89.6 |
0.447 |
98.8 |
91 |
0.592 |
99.1 |
93.5 |
0.794 |
99.5 |
96.1 |
This filter resistance recovery coefficient known to calculating is 0.6.Efficiency retention coefficient is 0.6212.
Is there is the decline of efficiency and resistance after blowback in sample, and filter is in blowback in blowback performance test
Drop in resistance is bigger afterwards, i.e. filter resistance recovery coefficient is bigger, and it is higher to represent its blowback self-cleaning ability;Under blowback behind efficiency
Drop smaller, i.e. efficiency retention coefficient is bigger, and it is better to represent the ability that it keeps itself filter efficiency.
The effect of above-described embodiment is specifically to introduce essentiality content of the invention, but those skilled in the art should know
Protection scope of the present invention should not be confined to the specific embodiment by road.