CN106644494A - Method and apparatus for evaluating moisture resistance of air intake filter of gas turbine - Google Patents
Method and apparatus for evaluating moisture resistance of air intake filter of gas turbine Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention discloses a method and apparatus for evaluating the moisture resistance of the air intake filter of a gas turbine. According to the method, humidified air is made to pass through the intake air filter, so that resistance delta P of the intake air filter is measured; the resistance delta P is modified into delta P 1.203 according to a formula 1; the intake air filter is graded according to the change value of the delta P 1.203 in a certain time or time for the delta P 1.203 to reach a certain numerical value; the moisture resistance of the air intake filter is evaluated. Such method and apparatus provided by the invention are put forward for the first time both at home and abroad; and on the basis of the filter itself, the process of the change of the filter with the time under the stress of high-humidity air is quantified, and therefore, the moisture resistance of the air intake filter is evaluated. The method is suitable for the evaluation of general ventilation filters. The method is of great significance to solving of a moisture plugging problem faced by the intake air filter of the gas turbine and the regulation of air filter manufacturers.
Description
Technical field
The present invention relates to gas turbine air induction system field, can expand to the rotation using general ventilation filter
A kind of fields such as machinery, HVAC, and in particular to method and apparatus of evaluation combustion engine turbine air intake filtration device anti humility performance.
Background technology
Tradition evaluates the method for general ventilation filter and according to essentially according to GB14295 (air cleaner), EN779
(measure of general ventilation filter-strainability), ASHRAE52.2 are (according to the general ventilation filter of efficiency test of granular size
The method of device) and the standard such as ISO29461-1-2013 (measure of general ventilation filter-strainability), with filter paper technology
With the progress of production technology, the evaluation method such as resistance, efficiency and dust containing capacity cannot meet the reality of production in traditional standard
Need, especially when filter is used in the environment of higher levels of humidity when.
Combustion engine air intake filtration device enters unique one defence line of combustion engine as outside air, to combustion engine safe operation and
Operating efficiency has very important impact.China's ground combustion machine be mainly distributed on oil and gas pipes along the line and Beijing-Tianjin, the Yangtze River Delta,
The areas such as Pearl River Delta, its inlet air filter system generally existing meets wet weather resistance drastically elevated phenomenon, causes combustion engine to be forced
Load down runs or shuts down.
It is to lack method and the standard that filter anti humility performance is evaluated all the time to trace it to its cause, and causes pin of having no idea
To high humidity environment evaluation or from the preferable filter of anti humility performance.When the poor filter of anti humility performance in low temperature season and
When high humidity weather runs, the liquid droplet being blocked when the filter due to high velocity air and throttle effect separate out aqueous water
Comprehensive function, causes the filter differential pressure short time significantly to raise, and has a strong impact on unit safety economical operation.
The evaluation method of filter anti humility performance is no matter international or belong to blank at home, therefore the method for this patent
" wet stifled " difficult problem, the production of specification air cleaner manufacturing firm faced to solution combustion engine air intake filter is all with important
Meaning.
The content of the invention
For existing filter detection technique and the disappearance of evaluation criterion, an object of the present disclosure is that offer one kind can
The method for evaluating combustion engine inlet air filter anti humility performance, starts with itself from filter, quantifies filter resistance empty by high humidity
Process over time when gas is coerced, with this quality of ratings filter anti humility performance is carried out；
Second purpose of the invention is to provide a kind of device for evaluating combustion engine turbine air intake filtration device anti humility performance.
Above-mentioned purpose is achieved by the following technical solution：
A kind of method for evaluating combustion engine turbine air intake filtration device anti humility performance：Humidifying air is continued through to be tested
The pressure differential of air intake filter, the real time measure filter air inlet side to be determined and outlet side, i.e., filter intake resistance to be tested
Δ P, then resistance Δ P is modified into Δ P according to formula 11.203, according to air intake filter in setting time Δ P1.203Change
Value or Δ P1.203The time of setting numerical value experience is reached to air intake filter divided rank, evaluate air intake filter anti humility performance；
Formula 1 is as follows：
Wherein, ρ1.203=1.203kg/m3, u1.203=17.853 × 10-6Pas, ρ and u are respectively according to formula 2 and formula
3 calculate：
Wherein, pvCalculated according to formula 4：
Wherein,For the relative humidity of humidifying air, psCalculated according to formula 5：
Wherein, the t and p in formula 2,3,5 represents the temperature and pressure of humidifying air；
The computational methods of n are in the index of above-mentioned formula 1：Measure the volume of air flow q of air intake filter porchvWith enter
Air filter resistance Δ P, according to formula Δ p=c (qv)n, c=k × u2-n×ρn-1, tried to achieve with least square method；Wherein, k is normal
Number.
Further, relative humidity isHumidifying air be through relative humidityNon- humidifying air humidification and obtain, plus
Moisture mlCalculated by formula 6 and determined：
ml=qvρ0(d-d0) (formula 6)
Wherein, qvFor the volume flow of non-humidifying air, d0With the water capacity that d is respectively non-humidifying air and humidifying air,
Pass sequentially through formula 7 and formula 8 is calculated；ρ0For the density of non-humidifying air, it is calculated by formula 9；
Wherein,ps0And psIt is calculated by formula 10 and formula 11：
Wherein, the p in formula 7,8,90With the pressure that p represents respectively non-humidifying air and humidifying air；Formula 10 and public affairs
T in formula 110With the temperature that t represents respectively non-humidifying air and humidifying air.
Further, the relative humidity of humidifying airMore than 95%.
Setting time is preferably 0.5-10 hours, it is also possible to require setting analog value according to actual standard；The setting number
Value is preferably 200-800Pa, it is also possible to require setting respective value according to actual standard.
A kind of device for evaluating combustion engine turbine air intake filtration device anti humility performance：It is pre- including air inlet plenum, humid air
Mixed room, filter pipeline section to be measured, flowmeter and blower fan；Pressure, temperature-humidity sensor are disposed with the air air inlet room,
Connected by pipeline between air inlet plenum and humid air premixer, the air being made up of multiple atomizers is provided with pipeline and is added
Wet device；The filter pipeline section to be measured is connected with humid air premixer, and inside is disposed with filter to be measured, before filter to be measured
Pressure, temperature-humidity sensor are respectively disposed with afterwards；Flowmeter is provided with pipeline after the filter pipeline section to be measured
And blower fan.
Further, the air inlet face of the air inlet plenum is disposed with filter.
Further, it is disposed with primary-air recirculating system in the air air inlet room.
Further, the air humidifier is connected with PID controller.
Further, the arranged direction of atomizer is in opposite direction with Atmospheric Flow.
Further, the filter pipeline section to be measured is provided with observation window.
Further, the blower fan is axial flow blower.
Beneficial effects of the present invention：
1st, the method that the present invention is provided belongs at home and in the world proposition for the first time, starts with itself from filter, measures
Change filter resistance process over time when being coerced by highly humid air, the quality of ratings filter anti humility performance come with this,
The method is applied to the evaluation of general ventilation filter, to solving " wet stifled " difficult problem, specification sky that combustion engine air intake filter faces
The production of air filter manufacturing firm all has great importance；
2nd, the present invention provide device select horizontal system, connection and reasonable arrangement, it is ensured that water smoke fully quickly mixes with air,
It is reliably used for research evaluation combustion engine turbine air intake filtration device anti humility performance.
Description of the drawings
Fig. 1 is the logic diagram of evaluation method of the present invention；
Fig. 2 is the structural representation of evaluating apparatus of the present invention；
Fig. 3 is anti humility performance change curve；
In Fig. 2,1- air inlet faces (arrangement high efficiency particulate air filter)；2- air inlet plenums (can contain primary-air recirculating system)；3- air
Pressure, temperature-humidity sensor；4- atomizers；5-PID controllers；6- humid air premixer；It is pressure before 7- filters, temperature, wet
Degree sensor；8- filter pipeline sections to be measured；9- observation windows；Pressure, temperature-humidity sensor after 10- filters；11- flowmeters；12-
Axial flow blower.
Specific embodiment
Technical scheme is specifically introduced below in conjunction with the accompanying drawings.
A kind of method for evaluating combustion engine turbine air intake filtration device anti humility performance：By the air after humidification through air inlet
Filter, measures air intake filter resistance Δ P, then resistance Δ P is modified into Δ P according to formula 11.203, existed according to air intake filter
Δ P in certain hour1.203Changing value or Δ P1.203The time of certain numerical value experience is reached to air intake filter divided rank,
Evaluate air intake filter anti humility performance.Test surveys data by standard air density 1.203kg/m3It is modified, this density pair
Answer the humidified density reached under saturation state of air of standard state.Verification experimental verification, atmospheric density is in 1.16kg/m3~
1.24kg/m3Between when be not required to amendment.
Formula 1 is as follows：
Wherein, ρ1.203=1.203kg/m3, u1.203=17.853 × 10-6Pas, ρ are temperature t (DEG C), atmospheric pressure p
And relative humidity (Pa)Under atmospheric density (kg/m3), calculated according to formula 2；U is that the power at temperature t (DEG C) glues
Degree (Pas), calculates according to formula 3：
Wherein, pvFor the steam partial pressure in air, calculated according to formula 4：
Wherein,For the relative humidity of humidifying air；
ps(Pa) be air themperature t (DEG C) when saturated vapor pressure, calculated according to formula 5：
Wherein, the t and p in formula 2,3,5 represents the temperature and pressure of humidifying air；
The computational methods of n are in the index of above-mentioned formula 1：Measure the volume of air flow q of air intake filter porchvIt is (single
Position m3/ s) and air intake filter resistance Δ P (unit Pa), according to formula Δ p=c (qv)n, c=k × u2-n×ρn-1, use a most young waiter in a wineshop or an inn
Multiplication is tried to achieve；Wherein, k is constant；μ is aerodynamic force viscosity (unit Pas)；ρ is atmospheric density (units/kg/m3)。
Least square method computational methods are known computational methods, are simply described below：
Former formula is power function
Take the logarithm and obtain：
Ln Δ p=lnk+ (2-n) lnu+ (n-1) ln ρ+nlnqv
Ln Δs p-2lnu+ln ρ=lnk+n (lnqv+lnρ-lnu)
At a temperature of various inlet, it is possible to obtain Δ p, u, ρ and qvTest data；
Can determine simplified linear fit function：
And then n values are tried to achieve by least square solution.
Further, relative humidity isHumidifying air be through relative humidityNon- humidifying air humidification and obtain,
Plus moisture mlCalculated by formula 6 and determined：
ml=qvρ0(d-d0) (formula 6)
Wherein, qvFor the volume flow of non-humidifying air, d0With the water capacity that d is respectively non-humidifying air and humidifying air,
Pass sequentially through formula 7 and formula 8 is calculated；ρ0For the density of non-humidifying air, it is calculated by formula 9；
Wherein,ps0And psIt is calculated by formula 10 and formula 11：
Wherein, the p in formula 7,8,90With the pressure that p represents respectively non-humidifying air and humidifying air；Formula 10 and public affairs
T in formula 110With the temperature that t represents respectively non-humidifying air and humidifying air.
A kind of device for evaluating combustion engine turbine air intake filtration device anti humility performance, as shown in Fig. 2 including air air inlet
Room, humid air premixer, filter pipeline section to be measured, flowmeter and blower fan；Be disposed with the air air inlet room pressure, temperature,
Humidity sensor, is connected between air inlet plenum and humid air premixer by pipeline, is provided with pipeline by multiple atomizers
The air humidifier of composition；The filter pipeline section to be measured is connected with humid air premixer, and inside is disposed with filter to be measured, treats
Pressure, temperature-humidity sensor are respectively disposed with before and after surveying filter；Pipeline after the filter pipeline section to be measured
Inside it is provided with flowmeter and blower fan.Wherein, the air inlet face of the air inlet plenum is disposed with filter；Cloth in the air air inlet room
It is equipped with primary-air recirculating system；The air humidifier is connected with PID controller；The arranged direction of atomizer and Atmospheric Flow side
To contrary；The filter pipeline section to be measured is provided with observation window；The blower fan is axial flow blower.
Evaluate dynamic high-medium efficient filter case study on implementation：
Using horizontal test bed of the present invention, filter A horizontal positioneds to be evaluated.Indoor intake air temperature is 20 DEG C,
Relative humidity is 65%, sets vent flow as 3400m3/ h, preset air state is 100% relative humidity saturation state.
Add moisture by needed for the device is calculated with control targe air condition according to inlet air humiture, by above-mentioned public affairs
Formula is calculated plus moisture is 6.85kg/h so that inlet air relative humidity reaches 100%.Anti humility performance change curve such as Fig. 3, mistake
Filter A initial differential pressures are 120Pa, and pressure reduction gradually increases to 320Pa after three hour humid air of experience.
Dynamic high-medium efficient filter evaluation index (EF) is as shown in table 1, according to EF=f (Δ p, ml, T), ml=6.85kg/h
When, (this is through big as 150Pa, 300Pa and 500Pa third gear further to set three hours pressure reduction variations numerical value EF0, EF1, EF2
Amount test, recommends numerical value).Such as reached 500Pa less than three hours, then according to reach 500Pa time stepping (time and resistance,
First comer is defined).Three hours pressure reduction raises 200Pa in the moisture-resistant test of filter A, is according to evaluation index moisture-resistant grade is recommended
EF1, anti humility performance is excellent in like product.
The dynamic high-medium efficient filter evaluation index (m of table 1l=6.85kg/h, RH=100%)
| Grade | Three hours pressure reduction changing values (Pa) | Change 500Pa times (h) | Evaluate |
| EF0 | Less than 150 | Excellent+ | |
| EF1 | Less than 300 | It is excellent | |
| EF2 | Less than 500 | Excellent- | |
| EF3 | N/A | 2h≤T<3h | Good+ |
| EF4 | N/A | 1h≤T<2h | It is good |
| EF5 | N/A | 0.5h≤T<1h | Good- |
| EF6 | N/A | <0.5h | Difference |
To sum up, practical application of the present invention includes following four steps, and logic is as shown in Figure 1：
Step 1, determines the test device of this method.General ventilation filter in domestic and international relevant criterion mentioned above
The experimental rig that is arranged horizontally of property test platform.Equally generate electricity at home with more than gas-turbine gas handling system using choosing
Horizontal system is used, the filter in gas handling system is horizontally disposed.Patent of the present invention is with horizontally disposed testing stand to anti humility performance
Test is described, as shown in Figure 2.In testing stand mainly comprising dry air inlet plenum, atomising device, humid air premixer, treat
Survey filter pipeline section and axial flow blower.A whole set of experimental rig adopts negative pressure inlet.In order to ensure that water smoke is fully quickly mixed with air
Close, nozzle spray direction is contrary with dry air airflow direction.Atomising device comprising clean water system, high-pressure hydraulic pump, atomizer,
Sensor (3 and 7) and PID control system.Dry air room (air inlet plenum 2) can be the free air inlet of air, or arrange return air system
System.The section of humid air premixer 6 is for square, or flaring circular cross-section.There are several sections of square air channel pipeline sections in testing stand, install and filter
Pipeline section (filter pipeline section 8 to be measured) the name internal diameter of device is between 616mm～622mm.The minimum length of the pipeline section is at least and treats
Survey filter depth 1.1 times.Other pipeline sections are beneficial on the basis of test.Duct materialses should be conductive and be grounded, and with smooth
Inner surface, and with enough intensity to ensure operating pressure under it is indeformable.In order to observe filter and equipment, test air way
In local can adopt transparent glass or plastic material.
Step 2, determines air inlet temperature and flow.The pressure of the temperature and flow effect filter to be measured of inlet air
Difference.This method presses international standard ISO8778, and (temperature is 20 DEG C, relative humidity is 65%, pressure to select standard air state (ANR)
Power is 0.1MPa, the density p=1.185kg/m of air3) on the basis of.Normal air is humidified to be reached after saturation, and temperature is
15.15 DEG C, atmospheric density is 1.203kg/m3.Test to humid air under different temperatures, the amendment of filter pressure difference is shown in above-mentioned
Formula.
The charge flow rate of general ventilation filter is 3400m in domestic and international relevant criterion mentioned above3/h.The present invention
In to general ventilation filter charge flow rate from be 3400m3/ h, experimental result can be used as effective benefit of domestic and international relevant criterion
Fill.
Step 3, is carried out plus moisture control, simulates high humidity environment.Test device of the present invention includes that PID control is humidified and mist
Makeup is put, and is capable of achieving the accurate control that water smoke air is taken in the larger unsaturated humid air of relative humidity, saturated moist air and supersaturation
Make, plus moisture control computational methods are shown in above-mentioned formula.The step is considered and can meet anti-to filter under different humidity
The evaluation of wet performance.Tested according to numerous studies, it is proposed that relative humidity control is more than 95%.
Step 4, filter resistance is quantified over time.After the step of the above three determines, to filter sample to be measured
The logical humid air of product is tested, the variation relation curve of recording filter resistance and time.Name evaluation index is EF, then EF=
f(Δp,ml, T), wherein Δ p is pressure reduction changing value, and the filter efficiency of filter is taken into full account during definition；mlTo add moisture, with ring
Environmental temperature and humidity relation is larger；T is the time for reaching certain resistance, integrated filter filter efficiency and completes this evaluation method and can hold
The time received determines the reasonable value of T.The meaning that filter resistance is quantified over time is to can be used for single inspection
The evaluation of test sample product, can be equally used for the lateral comparison of multiple detection samples.
The method that the present invention is provided is belonged to propose for the first time at home and in the world, started with itself from filter, quantifies
Process over time when filter resistance is coerced by highly humid air, with this quality of ratings filter anti humility performance is carried out, should
Method is applied to the evaluation of general ventilation filter, to solving " wet stifled " difficult problem, specification air that combustion engine air intake filter faces
The production of filter manufacturing firm all has great importance；
The device that the present invention is provided selects horizontal system, connection and reasonable arrangement, it is ensured that water smoke fully quickly mixes with air, can
It is used for research evaluation combustion engine turbine air intake filtration device anti humility performance by ground.
The effect of above-described embodiment be only that explanation the present invention essentiality content, but not with this limit the present invention guarantor
Shield scope.It will be understood by those within the art that, technical scheme can be modified or be equal to replace
Change, without deviating from the essence and protection domain of technical solution of the present invention.
Claims (10)
1. it is a kind of evaluate combustion engine turbine air intake filtration device anti humility performance method, it is characterised in that：Humidifying air is continuous
By air intake filter to be tested, the pressure differential of the real time measure filter air inlet side to be determined and outlet side, i.e., filtration to be tested
Device intake resistance Δ P, then resistance Δ P is modified into Δ P according to formula 11.203, according to air intake filter in setting time Δ
P1.203Changing value or Δ P1.203The time of setting numerical value experience is reached to air intake filter divided rank, evaluate inlet air filtration
Device anti humility performance；Formula 1 is as follows：
Wherein, ρ1.203=1.203kg/m3, u1.203=17.853 × 10-6Pas, ρ and u are counted respectively according to formula 2 and formula 3
Calculate：
Wherein, pvCalculated according to formula 4：
Wherein,For the relative humidity of humidifying air, psCalculated according to formula 5：
Wherein, the t and p in formula 2,3,5 represents the temperature and pressure of humidifying air；
The computational methods of n are in the index of above-mentioned formula 1：Measure the volume of air flow q of air intake filter porchvWith air inlet
Filter Resistance Δ P, according to formula Δ p=c (qv)n, c=k × u2-n×ρn-1, tried to achieve with least square method；Wherein, k is constant.
2. method according to claim 1, relative humidity isHumidifying air be through relative humidityDo not humidify sky
Gas is humidified and obtained, it is characterised in that：Plus moisture mlCalculated by formula 6 and determined：
ml=qvρ0(d-d0) (formula 6)
Wherein, qvFor the volume flow of non-humidifying air, d0With the water capacity that d is respectively non-humidifying air and humidifying air, successively
It is calculated by formula 7 and formula 8；ρ0For the density of non-humidifying air, it is calculated by formula 9；
Wherein,ps0And psIt is calculated by formula 10 and formula 11：
Wherein, the p in formula 7,8,90With the pressure that p represents respectively non-humidifying air and humidifying air；In formula 10 and formula 11
t0With the temperature that t represents respectively non-humidifying air and humidifying air.
3. method according to claim 2, it is characterised in that：The relative humidity of humidifying airMore than 95%.
4. method according to claim 1, it is characterised in that：The setting time is preferably 0.5-10 hours；It is described to set
Fixed number value is preferably 200-800Pa.
5. it is a kind of evaluate combustion engine turbine air intake filtration device anti humility performance device, it is characterised in that：Including air inlet plenum,
Humid air premixer, filter pipeline section to be measured, flowmeter and blower fan；Pressure, temperature, humidity are disposed with the air air inlet room
Sensor, is connected between air inlet plenum and humid air premixer by pipeline, is provided with pipeline and is made up of multiple atomizers
Air humidifier；The filter pipeline section to be measured is connected with humid air premixer, and inside is disposed with filter to be measured, mistake to be measured
Pressure, temperature-humidity sensor are respectively disposed with before and after filter；Cloth in pipeline after the filter pipeline section to be measured
It is equipped with flowmeter and blower fan.
6. device according to claim 5, it is characterised in that：The air inlet face of the air inlet plenum is disposed with filter.
7. device according to claim 5, it is characterised in that：Primary-air recirculating system is disposed with the air air inlet room.
8. device according to claim 5, it is characterised in that：The air humidifier is connected with PID controller.
9. device according to claim 5, it is characterised in that：The arranged direction of atomizer and Atmospheric Flow direction phase
Instead.
10. device according to claim 5, it is characterised in that：The filter pipeline section to be measured is provided with observation window.
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| CN109300564A (en) * | 2018-09-20 | 2019-02-01 | 中国辐射防护研究院 | A kind of device and method of the blocking of simulation steam and corrosion filter |
| CN113109235A (en) * | 2021-04-21 | 2021-07-13 | 中国建筑科学研究院有限公司 | System and method for testing water resistance performance of filter |
| CN113109235B (en) * | 2021-04-21 | 2023-02-14 | 中国建筑科学研究院有限公司 | System and method for testing water resistance performance of filter |
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| CN106644494B (en) | 2019-03-19 |
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Address after: 210023 No. 10 Wonderland Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee after: North China Electric Power University Patentee after: Guodian Nanjing electric power test & Research Co., Ltd. Address before: 210023 No. 10 Wonderland Road, Qixia District, Nanjing City, Jiangsu Province Co-patentee before: North China Electric Power University Patentee before: Nanjing Power Equipment Quality & Performance Test Center |
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Address after: 210023 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Patentee after: NORTH CHINA ELECTRIC POWER University Address before: 210023 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN NANJING ELECTRIC POWER TEST RESEARCH Co.,Ltd. Patentee before: NORTH CHINA ELECTRIC POWER University |