CN106996883A - Desulphurization for Coal-fired Power Plant equipment performance tests flue gas droplet sampling apparatus and the method for sampling - Google Patents
Desulphurization for Coal-fired Power Plant equipment performance tests flue gas droplet sampling apparatus and the method for sampling Download PDFInfo
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- CN106996883A CN106996883A CN201710424666.3A CN201710424666A CN106996883A CN 106996883 A CN106996883 A CN 106996883A CN 201710424666 A CN201710424666 A CN 201710424666A CN 106996883 A CN106996883 A CN 106996883A
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- 238000005070 sampling Methods 0.000 title claims abstract description 208
- 239000003546 flue gas Substances 0.000 title claims abstract description 132
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000011056 performance test Methods 0.000 title description 6
- 239000011521 glass Substances 0.000 claims abstract description 52
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 36
- 230000000694 effects Effects 0.000 claims abstract description 26
- 239000004809 Teflon Substances 0.000 claims abstract description 11
- 229920006362 Teflon® Polymers 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000002474 experimental method Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 7
- 230000023556 desulfurization Effects 0.000 claims description 5
- 230000003189 isokinetic effect Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000007799 cork Substances 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 4
- 229910001425 magnesium ion Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
Abstract
The invention discloses a kind of Desulphurization for Coal-fired Power Plant equipment performance experiment flue gas droplet sampling apparatus and method of sampling, the problem of solving big error that existing droplet sampling apparatus is present and not high sampling quality.In flue gas droplet sampling bottle（2）Left end be provided with stainless steel sampling mouth（5）, in flue gas droplet sampling bottle（2）Right-hand member taper it is open in activity be plugged with closed taper droplet trapping condensing bulb（6）, condensing bulb is trapped in closed taper droplet（6）Left side on be provided with spiral glass pipe（7）, in closed taper droplet trapping bottle（6）Right side on be provided with escape pipe（8）, in flue gas sampling power set（16）On be provided with flue gas survey kinetic pressure balancing communicating pipe（17）And Pitot tube（18）, Pitot tube（18）Air inlet be stainless steel suction nozzle with being coated with teflon coatings（5）On same longitudinal section.The sampling of kinetic pressure balancing constant speed droplet is realized, droplet content measuring quality is improved.
Description
Technical field
It is more particularly to a kind of to be carried out to coal-fired power plant's wet desulphurization equipment the present invention relates to a kind of droplet sampling apparatus
During performance test, the device and the method for sampling of droplet sampling are carried out in flue gas.
Background technology
In the process of running, boiler combustion can produce substantial amounts of flue dust, SO for coal-fired station2And nitrogen oxides.For
The purpose of environment protection emission is reached, electric cleaner is respectively provided between boiler and chimney, for removing in boiler smoke
Flue dust；Desulfuration absorbing tower is provided with again, for absorbing the SO in flue gas2.It is current fire coal using wet method flue gas-desulfurizing absorption tower
The sulfur method that thermal power plant is generally used, but wet method flue gas-desulfurizing absorption tower is in the process of running, and easily producing particle diameter is
Dissolved with sulfuric acid, sulfate, SO in 10-60 microns of droplet, the droplet2Deng material, when the droplet containing these corrosive deposits with
When being arranged outside the flowing of flue gas, the fouling corrosion of boiler tail blower fan, heat exchanger, flue and chimney can be caused, is directly influenced
The safe and stable operation of Power Plant, and these droplets enter air after, secondary pollution can be caused to environment.Therefore, thermoelectricity
Factory's smoke-gas wet desulfurization proposes demisting requirement in technique to absorption tower, and flue gas is before desulfurizer is left, it is necessary to carry out demisting
Processing.Demister is the capital equipment for carrying out demisting in desulphurization plant to flue gas, and it can directly affect desulfurizer except fog effect
The continuous reliability service of each system, its performance quality is more related to the size of the desulfuration efficiency of desulphurization plant.At present, to power plant
Except the examination of fog effect is determined, mainly by flue gas slurry drops content number complete what is determined, and in flue gas
The means of slurry drops assay, are realized by droplet sampling apparatus.The method that droplet concentration is tested in engineering is main
Use：Magnesium ion trace method, i.e., carry out droplet sampling at demister exiting flue gas road using predicted velocity method, specific real
The process applied is：At the thieff hatch of demister exhaust pass, flue gas flow rate measure is first carried out by gridding method, is tied according to determining
Really, then to flue gas sampling equipment flow set is carried out, finally, under conditions of the firm discharge value of setting, to some fixing point
Position carries out flue gas droplet sampling；That is, the glass droplet being connected on thief rod is trapped into sampling head, is arranged on some fixing point position
Flue gas droplet sampling is carried out, and the pumping end of smoke dust sampler is connected to by power pipe of sampling, flue gas droplet sampling is carried out.Cigarette
The trapping that droplet in gas passes through certain time（Pumping）It is sucked into glass droplet trapping sampling head, droplet hits cold with flue gas
Coagulate in glass droplet trapping sampling head drainer body, after the completion of sampling, the trapping sampling condensation of glass droplet is rinsed with distilled water
Mg2+ concentration in tank, constant volume post analysis droplet；The Mg2+ concentration in slurries filtrate is analyzed simultaneously, finally, according to two Mg2+
Concentration value, calculates droplet concentration.The subject matter that this sampling determination method is present is：（1）Sampling can not realize kinetic pressure balancing
Continuous automatic following sample, because coal-burning boiler operating mode is at any time in change, when flue gas droplet is sampled, the stream of flue gas sampling equipment
Amount setting is determined in advance, and flow velocity when flue gas flow rate parameter is with actual samples is inconsistent, in addition, demister exhaust pass
Tortuous, flue cross section product is big, and flue gas is in turbulence state, and flowed fluctuation is larger, it is this preset flue gas flow rate method be can not
Obtain accurate sampled value；（2）When the operating mode of boiler changes, sampling can not in time be corrected with operating mode, make experiment
Data have great uncertain；（3）The glass sampling device of flue gas fog drip gathering device is easily touched in sampling process
Crash through it is broken, cause sampling fail；（4）When long-time droplet is sampled, the flue gas condensing water in pipeline is back to the trapping of flue gas droplet
In bottle, the distortion of sampling droplet is caused；（5）Droplet trapping sampling bottle sampling mouth is non-exchange, it is impossible to according to sampling operating mode not
With replacing is adjusted, sampling precision is influenceed.
Existing droplet sampler is made up of three section transparent glass tubes, and glass is fixedly installed on first segment glass tube
Spiral glass pipe passage is provided with suction nozzle, second section glass tube, buffer cavity, three sections are set in Section of three glass tube
Glass tube socket connection together, and is fixed by adhesive tape, and connect three section glass tubes are fixed on into an iron during sampling
On, and be inserted into the flue of desulfurizing tower outlet.The method of sampling is predicted velocity method, in order to it is accurate adopt droplet sample, it is necessary to
According to different flue gas flow rates, the sampling mouth of different sampling flow and respective diameters is set to flue gas sampler, due to this kind of mist
The bore for dripping the sampling suction nozzle of trap is fired for glass, it is difficult to reach size and essence of the flue gas sampler to suction nozzle of sampling
Degree is required, and because the bore of the sampling suction nozzle of the spray trap can not be selected on demand, prevents it from coming by exhaust gas volumn
Adjustment sampling air inlet bore, it is impossible to control the droplet sampling time；Carry out certain difficulty to droplet sample strip.Further, since in flue
Numerous supporting steel frames are provided with, glass fog drip gathering device occurs and branch when extracting flue after the completion of insertion and sampling, easily
Support steelframe, which collides, causes breakage, and loss is brought to test job；Simultaneously as there are two rings during three section glass tube connections
Shape gap, leaks out because the change of glass tube inside and outside differential pressure easily causes annulus, has influence on the accurate sampling of droplet；Due to droplet
Sampler is connected on flue gas sampling power set, and aspiration pump is provided with flue gas sampling power set, in order to improve
Droplet sampling quality, it is desirable to which the draft of aspiration pump will realize kinetic pressure balancing, existing skill with the air pressure at spray trap suction nozzle
Art is applied forecasting flow velocity method, i.e., the pressure of each point on sampling face in flue is first tested by gridding method, calculates and determines flue gas flow rate,
And the flow of sampling kinetic pump flue gas sampler is set, in droplet sampling process, the draft of flue gas sampler flow is constant
, because the pressure and flow velocity of flue gas in flue are that, with operating mode dynamic change, original the whole of droplet trapping sampling apparatus is adopted
Sample process, it is impossible to completed under condition of dynamic balance, relatively large deviation is caused to droplet sampling；Because droplet trapping needs to adopt for a long time
Sample, fog drip gathering device aspirates nearly saturation wet flue gas, the sampling exhaust tube of droplet trapping sampling head-tail for a long time in flue
It is that flue is exposed on road partially due to the temperature difference is difficult to avoid producing condensed water, condensed water is from the pipe of connection flue gas sampling power set
It is back in droplet trapping sampling head, causes droplet trapping sampling inaccurate or even failure, directly affect whole result of the test.
The content of the invention
The invention provides a kind of Desulphurization for Coal-fired Power Plant equipment performance experiment flue gas droplet sampling apparatus and the method for sampling, solution
The error that the existing droplet sampling apparatus of having determined is present is big and the not high technical problem of sampling quality, realizes comparatively ideal dynamic pressure flat
Droplet trapping of weighing is sampled, and omitted flue gas flow rate Prediction program, overcomes flue gas flow rate with error caused by working conditions change.
The present invention is to solve above technical problem by the following technical programs：
A kind of droplet sampling apparatus of coal-fired power plant's wet desulfurization demister, including flue gas sampling power set, sampling gun barrel,
Taper sleeve pipe, coniform rubber stopper, closed taper droplet trapping condensing bulb and flue gas droplet sampling bottle, flue gas sampling power dress
Put and linked together by the rear end of sample power flexible pipe and gun barrel of sampling, the front end for gun barrel of sampling passes through exhaust tube and the cone of sampling
Shape sleeve pipe connection together, is provided with glass air inlet in the left end of flue gas droplet sampling bottle, is socketed with glass air inlet
Mouth of sampling connects flexible pipe, the stainless steel sampling mouth for being coated with teflon coatings is plugged with sampling mouth connection flexible pipe, in flue gas
The right-hand member of droplet sampling bottle is provided with taper opening, and activity is plugged with closed taper droplet and traps condensation in taper is open
Bottle, is provided with spiral glass pipe on the left side of closed taper droplet trapping condensing bulb, is caught in closed taper droplet
Escape pipe is provided with the right side for collecting bottle, spiral glass pipe is arranged in flue gas droplet sampling bottle, in coniform rubber stopper
In be provided with through hole, escape pipe activity is plugged in the left hole of the through hole in coniform rubber stopper, in coniform rubber stopper
Activity is plugged with stainless steel tube in the right hole of the through hole of setting, and hemispherical umbrella crown is provided with the right output port of stainless steel tube,
Coniform rubber stopper activity is plugged in taper sleeve pipe, and hemispherical umbrella crown is provided in taper sleeve pipe, dynamic in flue gas sampling
Flue gas is provided with power apparatus and surveys kinetic pressure balancing communicating pipe, the front end of sampling gun barrel is provided with Pitot tube, Pitot tube and flue gas
The other end for surveying kinetic pressure balancing communicating pipe links together, and the air inlet of Pitot tube is the stainless steel with being coated with teflon coatings
Suction nozzle is on same longitudinal section, and the direction of the air inlet of Pitot tube and the direction of stainless steel suction nozzle are identical
's.
Droplet trapping bottle protective cover is socketed with flue gas droplet sampling bottle.
A kind of Desulphurization for Coal-fired Power Plant equipment performance tests the flue gas droplet method of sampling：Comprise the following steps：
Before the first step, droplet sampling, in the lab, each part of glass spray trap is respectively washed with demineralized water, cleaned
Finish after combination, 105ODried at a temperature of C 2 hours, it is then, stand-by in drier after being placed on after its completely cooling；
Second step, the combination connection for carrying out droplet sampling apparatus：The glass air inlet set in the left end of flue gas droplet sampling bottle
It is upper to be socketed sampling mouth connection flexible pipe, the stainless steel sampling mouth of teflon coatings is coated with grafting on sampling mouth connection flexible pipe,
The closed taper droplet of activity grafting traps condensing bulb in the taper that the right-hand member of flue gas droplet sampling bottle is set is open, by spiral
Shape glass tube is arranged in flue gas droplet sampling bottle, and escape pipe activity is plugged on to a left side for the through hole set in coniform rubber stopper
In portion hole, activity grafting stainless steel tube in the right hole of the through hole set in coniform rubber stopper, in the right-hand member of stainless steel tube
One hemispherical umbrella crown is set on mouth, and coniform rubber stopper is plugged in taper sleeve pipe, hemispherical umbrella crown is arranged on taper set
Guan Zhong, sets flue gas to survey kinetic pressure balancing communicating pipe on flue gas sampling power set, and Pitot tube is set in the front end of sampling gun barrel；
Before 3rd step, sampling, flue gas sampling amount is calculated by operating mode, exhaust gas volumn, and sets corresponding on big flow flue gas sampler
Sampling time, determine stainless steel sample mouth size dimension；Big flow flue gas automatic sampler can measure test site automatically
Dynamic pressure, static pressure in institute atmospheric pressure and flue, flue-gas temperature, humidity, flue gas flow rate, and according to the size chi of stainless steel sampling mouth
Very little, the automatic revolution speed of adjustment air in good time realizes the tracking isokinetic sampling to flue gas；
4th step, with gridding method arrange sampled point, will sampling gun barrel be inserted into flue, preheating certain time after, you can to open
Begin to have the flue gas droplet of kinetic pressure balancing to sample；
The present invention be applied to coal-fired power plant's wet desulphurization desulphurization plant performance test, realize flue gas droplet it is automatic with
Track, isopiestic equilibrationses and isokinetic sampling, reduce the program of flue fog drip content measuring work, alleviate experiment work intensity,
The testing ground working time is shortened, realizing flue gas droplet trapping sampling head can need to change different bores according to sampling quantity
Sampling mouth, realize kinetic pressure balancing constant speed droplet sampling, improve droplet content measuring quality.
Brief description of the drawings
Fig. 1 is the droplet sampling apparatus combination assembling structure schematic diagram of the present invention；
Fig. 2 is the structural representation of the flue gas droplet sampling bottle 2 of the present invention；
Fig. 3 is the attachment structure schematic diagram of the taper droplet trapping condensing bulb 6 and spiral glass pipe 7 of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
A kind of Desulphurization for Coal-fired Power Plant equipment performance experiment flue gas droplet sampling apparatus, including flue gas sampling power set 16,
Sampling gun barrel 19, taper sleeve pipe 13, coniform rubber stopper 9, closed taper droplet trapping condensing bulb 6 and flue gas droplet sampling bottle
2, flue gas sampling power set 16 are linked together by the rear end of sample power flexible pipe 15 and gun barrel 19 of sampling, gun barrel 19 of sampling
Front end linked together by exhaust tube 14 of sampling with taper sleeve pipe 13, the left end of flue gas droplet sampling bottle 2 is provided with glass
Glass air inlet 3, is socketed with sampling mouth connection flexible pipe 4 on glass air inlet 3, and spraying is plugged with sampling mouth connection flexible pipe 4
There is the stainless steel sampling mouth 5 of teflon coatings, the right-hand member of flue gas droplet sampling bottle 2 is provided with taper opening, it is open in taper
Middle activity is plugged with closed taper droplet trapping condensing bulb 6, is set on the left side of closed taper droplet trapping condensing bulb 6
Spiral glass pipe 7 is equipped with, escape pipe 8, spiral glass pipe are provided with the right side of closed taper droplet trapping bottle 6
7 are arranged in flue gas droplet sampling bottle 2, and through hole 10 is provided with coniform rubber stopper 9, and the activity of escape pipe 8 is plugged on circular cone
In the left hole of through hole 10 in shape rubber stopper 9, activity grafting in the right hole of the through hole 10 set in coniform rubber stopper 9
There is stainless steel tube 11, hemispherical umbrella crown 12 is provided with the right output port of stainless steel tube 11, the coniform activity of rubber stopper 9 is plugged on
In taper sleeve pipe 13, hemispherical umbrella crown 12 is provided in taper sleeve pipe 13, is provided with flue gas sampling power set 16
Flue gas surveys kinetic pressure balancing communicating pipe 17, and the front end of sampling gun barrel 19 is provided with Pitot tube 18, and Pitot tube 18 surveys dynamic pressure with flue gas
The other end of balance communicating pipe 17 is linked together, and the air inlet of Pitot tube 18 is entered with being coated with the stainless steel of teflon coatings
Valve 5 is on same longitudinal section, and the direction of the air inlet of Pitot tube 18 and the direction of stainless steel suction nozzle 5 are identical
's.
Flue gas containing droplet, with certain flow velocity, is entered in flue gas droplet sampling bottle 2 by stainless steel sampling mouth 5, by
In effect of inertia, big drop is knocked on the inwall of flue gas droplet sampling bottle 2 trapping that is separated, and droplet enters spiral shell with flue gas
Shape glass tube 7 is revolved, then by the rotation of spiral glass pipe 7, two grades of liquid droplet captures being centrifuged, flue gas is subsequently entered
In taper droplet trapping condensing bulb 6, further fine drop is trapped by reducing flue gas flow rate, the drop in flue gas is
After three-stage trapping, discharged by the escape pipe 8 of flue gas droplet sampling bottle 2.Coniform rubber stopper 9 facilitates flue gas droplet to adopt
Sample bottle 2 is installed, and makes sampling gas circuit more tight without gas leakage, closes more note between glass and steel sampling gun barrel.Coniform rubber
The other end of plug 9 is provided with a stainless steel tube 11, and the right-hand member of stainless steel tube 11 is provided with hemispherical umbrella crown 12, can prevent
The backflow of condensed water in sampling gun barrel 19；The end outlet of stainless steel tube, that is, the afterbody for gun barrel 19 of sampling is soft by power of sampling
Pipe 15 is connected on the suction inlet pipe of sampling power set 16, when flue gas droplet is sampled and tested, sampling power set 16
Kinetic pressure balancing function, realizes the sampling of flue gas droplet kinetic pressure balancing.
A kind of Desulphurization for Coal-fired Power Plant equipment performance tests the flue gas droplet method of sampling,：Comprise the following steps：
Before the first step, droplet sampling, in the lab, each part of glass spray trap is respectively washed with demineralized water, cleaned
Finish after combination, 105ODried at a temperature of C 2 hours, it is then, stand-by in drier after being placed on after its completely cooling；
Before on-test, glass spray trap is put into clean container and transports testing ground to, after the completion of sampling, by glass mist
Drop trap is removed from droplet sampling gun barrel, is sealed with sealing cork, the air inlet/outlet of seal glass spray trap, with pure
Water purification rinses the outer surface of trap, is dried with net cotton yarn water stain, and glass spray trap is weighed as early as possible, then 105ODried 2 hours at a temperature of C；
Second step, the combination connection for carrying out droplet sampling apparatus：The glass air inlet set in the left end of flue gas droplet sampling bottle 2
Socket sampling mouth connection flexible pipe 4 on 3, is coated with the stainless steel sampling of teflon coatings on sampling mouth connection flexible pipe 4 in grafting
Mouth 5, the closed taper droplet of activity grafting traps condensing bulb 6 in the taper of the right-hand member setting of flue gas droplet sampling bottle 2 is open,
Spiral glass pipe 7 is arranged in flue gas droplet sampling bottle 2, the activity of escape pipe 8 is plugged in coniform rubber stopper 9 and set
Through hole 10 left hole in, activity grafting stainless steel tube 11 in the right hole of the through hole 10 set in coniform rubber stopper 9,
One hemispherical umbrella crown 12 is set in the right output port of stainless steel tube 11, and coniform rubber stopper 9 is plugged in taper sleeve pipe 13, made
Hemispherical umbrella crown 12 is arranged in taper sleeve pipe 13, sets flue gas to survey kinetic pressure balancing communicating pipe on flue gas sampling power set 16
17, in the front end of sampling gun barrel 19, Pitot tube 18 is set；
Before 3rd step, sampling, flue gas sampling amount is calculated by operating mode, exhaust gas volumn, and sets corresponding on big flow flue gas sampler
Sampling time, determine stainless steel sample mouth 5 size dimension；Big flow flue gas automatic sampler can measure test site automatically
Dynamic pressure, static pressure in institute atmospheric pressure and flue, flue-gas temperature, humidity, flue gas flow rate, and according to the size of stainless steel sampling mouth 5
Size, the automatic revolution speed of adjustment air in good time realizes the tracking isokinetic sampling to flue gas；
4th step, with gridding method arrange sampled point, will sampling gun barrel 19 be inserted into flue, preheating certain time after, you can with
Begin with the flue gas droplet sampling of kinetic pressure balancing.
In flue gas droplet trapping sampling process, gun barrel of sampling（9 overwhelming majority are inserted vertically into flue thieff hatch, when
After sampling for a long time, in sampling gun barrel 19, condensed water is easily formed due to the temperature difference, condensed water contains that a large amount of other are miscellaneous
Matter, samples to form fatal damages to droplet, even results in test failure, the hemispherical umbrella crown 12 of back-flow preventer and coniform
The through hole 10 set in rubber stopper 9, forms isolation and the effect of umbrella on the gas outlet 8 of flue gas droplet sampling bottle 2, makes to adopt
Reflux condensation mode water can not be contacted into flue gas droplet sampling bottle 2 in sample gun barrel 19；When starting droplet sampling, first, by group
It is collectively referred to as the coniform rubber stopper 9 that the flue gas droplet sampling bottle 2 after weight is plugged in sampling gun barrel 19 head for being arranged on Pitot tube
On, the droplet trapping bottle protective cover 1 outside droplet trapping bottle plays a part of protecting flue gas droplet sampling bottle 2 not broken up,
On droplet trapping bottle protective cover 1, the observation window of multiple strips is provided with, it is convenient that sampling situations are observed；It is coated with Teflon
The stainless steel sampling mouth 5 of imperial coating, can be such that the drop in flue gas fully enters in flue gas droplet sampling bottle 2, improve capture rate
And sampling quality.
Claims (3)
1. a kind of droplet sampling apparatus of coal-fired power plant's wet desulfurization demister, including flue gas sampling power set（16）, adopt
Sample gun barrel（19）, taper sleeve pipe（13）, coniform rubber stopper（9）, closed taper droplet trapping condensing bulb（6）With flue gas droplet
Sampling bottle（2）, flue gas sampling power set（16）Pass through power flexible pipe of sampling（15）With sampling gun barrel（19）Rear end be connected to
Together, sampling gun barrel（19）Front end pass through exhaust tube of sampling（14）With taper sleeve pipe（13）Link together, it is characterised in that
In flue gas droplet sampling bottle（2）Left end be provided with glass air inlet（3）, in glass air inlet（3）On be socketed with sampling mouth connect
Connect flexible pipe（4）, in sampling mouth connection flexible pipe（4）On be plugged be coated with teflon coatings stainless steel sampling mouth（5）, in flue gas
Droplet sampling bottle（2）Right-hand member be provided with that taper is open, to be plugged with closed taper droplet trapping cold for activity in taper is open
Solidifying bottle（6）, condensing bulb is trapped in closed taper droplet（6）Left side on be provided with spiral glass pipe（7）, closed
Taper droplet trapping bottle（6）Right side on be provided with escape pipe（8）, spiral glass pipe（7）It is arranged on the sampling of flue gas droplet
Bottle（2）In, in coniform rubber stopper（9）In be provided with through hole（10）, escape pipe（8）Activity is plugged on coniform rubber stopper（9）
In through hole（10）Left hole in, in coniform rubber stopper（9）The through hole of middle setting（10）Right hole in activity be plugged with
Stainless steel tube（11）, in stainless steel tube（11）Right output port on be provided with hemispherical umbrella crown（12）, coniform rubber stopper（9）Activity
It is plugged on taper sleeve pipe（13）In, hemispherical umbrella crown（12）It is provided in taper sleeve pipe（13）In, in flue gas sampling power dress
Put（16）On be provided with flue gas survey kinetic pressure balancing communicating pipe（17）, in sampling gun barrel（19）Front end be provided with Pitot tube（18）,
Pitot tube（18）Kinetic pressure balancing communicating pipe is surveyed with flue gas（17）The other end link together, Pitot tube（18）Air inlet be with
It is coated with the stainless steel suction nozzle of teflon coatings（5）On same longitudinal section, and Pitot tube（18）Air inlet
Direction and stainless steel suction nozzle（5）Direction be identical.
2. a kind of droplet sampling apparatus of coal-fired power plant's wet desulfurization demister according to claim 1, its feature exists
In in flue gas droplet sampling bottle（2）On be socketed with droplet trapping bottle protective cover（1）.
3. a kind of droplet method of sampling of coal-fired power plant's wet desulfurization demister：Comprise the following steps：
Before the first step, droplet sampling, in the lab, each part of glass spray trap is respectively washed with demineralized water, cleaned
Finish after combination, 105ODried at a temperature of C 2 hours, it is then, stand-by in drier after being placed on after its completely cooling；
Before on-test, glass spray trap is put into clean container and transports testing ground to, after the completion of sampling, by glass mist
Drop trap is removed from droplet sampling gun barrel, is sealed with sealing cork, the air inlet/outlet of seal glass spray trap, with pure
Water purification rinses the outer surface of trap, is dried with net cotton yarn water stain, and glass spray trap is weighed as early as possible, then 105ODried 2 hours at a temperature of C；
Second step, the combination connection for carrying out droplet sampling apparatus：In flue gas droplet sampling bottle（2）Left end set glass air inlet
Mouthful（3）Upper socket sampling mouth connection flexible pipe（4）, in sampling mouth connection flexible pipe（4）Teflon coatings are coated with upper grafting not
Become rusty steel sampling mouth（5）, in flue gas droplet sampling bottle（2）The taper that sets of right-hand member it is open in the closed taper droplet of activity grafting
Trap condensing bulb（6）, by spiral glass pipe（7）It is arranged on flue gas droplet sampling bottle（2）In, by escape pipe（8）Activity grafting
In coniform rubber stopper（9）The through hole of middle setting（10）Left hole in, in coniform rubber stopper（9）The through hole of middle setting（10）
Right hole in activity grafting stainless steel tube（11）, in stainless steel tube（11）Right output port on set a hemispherical umbrella crown
（12）, coniform rubber stopper（9）It is plugged on taper sleeve pipe（13）In, make hemispherical umbrella crown（12）It is arranged on taper sleeve pipe（13）
In, in flue gas sampling power set（16）Upper setting flue gas surveys kinetic pressure balancing communicating pipe（17）, in sampling gun barrel（19）Front end
Pitot tube is set（18）；
Before 3rd step, sampling, flue gas sampling amount is calculated by operating mode, exhaust gas volumn, and sets corresponding on big flow flue gas sampler
Sampling time, determine stainless steel sample mouth（5）Size dimension；Big flow flue gas automatic sampler can measure experiment automatically
Dynamic pressure, static pressure in place atmospheric pressure and flue, flue-gas temperature, humidity, flue gas flow rate, and according to stainless steel sampling mouth（5）'s
Size dimension, the automatic revolution speed of adjustment air in good time realizes the tracking isokinetic sampling to flue gas；
4th step, with gridding method arrange sampled point, by gun barrel of sampling（19）It is inserted into flue, after preheating certain time, you can
Sampled with the flue gas droplet for beginning with kinetic pressure balancing.
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Application publication date: 20170801 |