CN206891804U - Sulfur trioxide in flue gas sampling system - Google Patents
Sulfur trioxide in flue gas sampling system Download PDFInfo
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- CN206891804U CN206891804U CN201720798369.0U CN201720798369U CN206891804U CN 206891804 U CN206891804 U CN 206891804U CN 201720798369 U CN201720798369 U CN 201720798369U CN 206891804 U CN206891804 U CN 206891804U
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Abstract
A kind of flue gas inspection device is the utility model is related to, specifically discloses a kind of sulfur trioxide in flue gas sampling system, including sampling gun, condensate collection device, absorption bottle, liquid drop separator, wet flow indicator, the sampling pump being sequentially connected by flue.The utility model has the advantages that：1）A kind of efficient sulfur trioxide in flue gas sampling system is provided, realizes quick, the accurate detection of sulfur trioxide content in boiler smoke.2）Sampling gun structure is improved, the sampling gun is not provided with heat-insulation layer and heating tape, greatly reduces the weight and volume of sampling gun, and beneficial to the fault restoration of sampling gun；And realize that the heat energy for making full use of flue gas carries out heat tracing, reduce heat tracing energy expenditure；Sampling gun overall structure is ingenious to simplify, easy to operate, beneficial to industrially promoting.
Description
Technical field
Flue gas inspection device is the utility model is related to, especially a kind of dress for being used to measure sulfur trioxide content in flue gas
Put.
Background technology
Contain sulfur trioxide in the flue gas of discharged from coal-fired boiler, particularly with the sulphur coal for having installed SCR additional, three in flue gas
Sulfur oxide easily combines to form sulfuric acid vapor with the vapor in flue gas, and is condensed in wall temperature less than at dew point, forms acid corrosion
And fouling, while the sulfur trioxide in flue gas is also easy to be combined generation hydrogen sulfate with the escape ammonia in denitration outlet flue gas
Ammonia, the blocking of the equipment such as air preheater is easily caused under cryogenic.
Sulfur trioxide in flue gas is control effectively, the accurate sulfur trioxide concentration detected in flue gas is key,
But sulfur trioxide content in flue gas is less that larger challenge is proposed to accurate measurement.
Utility model content
For the sulfur trioxide content in efficient, accurate measurement flue gas, the utility model provides a kind of sulfur trioxide in flue gas
Sampling system.
Technical scheme is used by the utility model solves its technical problem：Sulfur trioxide in flue gas sampling system, including
The sampling gun that is sequentially connected by flue, condensate collection device, absorption bottle, liquid drop separator, wet flow indicator, sampling
Pump.
Sampling gun mainly ensures flue gas before condensing unit is entered, and sulfur trioxide is not condensed, adsorbed together in flue gas
When ensure that the flue gas under long-time measuring condition stably enters condensate collection device, condensate collection device is mainly in guarantee flue gas
The condensation of sulfur trioxide is without allowing condensation vapor in flue gas, it is proposed that condensate collection device temperature control is advisable at 65~85 DEG C；
Absorption bottle is inhaled pernicious gas primarily to reduce harm of the sulfur dioxide to sampling pump and operating personnel in flue gas
Receive；Liquid drop separator main function is the excess moisture in separating flue；Wet flow indicator and sampling pump are mainly used for extracting
Flue gas and accurately measure, the two can also be replaced with single intelligent sampling pump.It is cold in order to ensure the stable absorption of sulfur trioxide
The bath temperature optimum temperature of solidifying device is 65~80 DEG C, condenses 3~6mm of optimum diameter of collecting pipe, the optimal stream of sampling pump
Amount scope is 1~10L/min.
As further improvement of the utility model, the structure of the sampling gun is：Including sampling pipe and it is arranged at sampling
Filter cylinder on pipe；Sampling pipe is divided into front-end sampling pipe and rear end sampling pipe by filter cylinder, is set on the outside of the sampling pipe and filter cylinder
Lagging casing is equipped with, the lagging casing has been internally formed exhaust gases passes, heat tracing gas approach is provided with the lagging casing
Pipe and heat tracing smoke outlet tube, flue gas can from heat tracing flue gas inlet tube enter exhaust gases passes in, and from heat tracing smoke outlet tube from
Open exhaust gases passes.
Another feature of the present utility model is that sampling gun is transformed, the sulfur trioxide sampling gun of our uses of past
Structure is as shown in Fig. 2 mainly include sampling pipe 1, filter cylinder 2, heat tracing pipe.
During sampling, flue gas enters in sampling pipe 1 at the front end inlet of sampling pipe 1, is filtered out by filter cylinder 2 in flue gas
After dust, enter from the rear end of sampling pipe 1 in condensate collection device, complete sampling.
Due to SO3Sampling can be condensed in the form of sulfuric acid vapor or sulfuric acid mist being transferred in apparatus measures terminal procedures
On pipe 1 and filter cylinder 2, cause sampling error and the strong corrosion to equipment, therefore to avoid SO3It is cold in sampling pipe 1 and filter cylinder 2
It is solidifying, need to carry out heat tracing in sampling process, existing typical method is to carry out companion to sampling process using the heat tracing pipe shown in Fig. 1
Heat.
Heat tracing pipe is made up of the heating tape of inside and outside heat-insulation layer and shell, and its principle is the electric heating using heating tape
Effect is heated to sampling pipe 1, and the stabilization of temperature is realized using heat-insulation layer.And heat-insulation layer has larger density and thickness
Degree, this causes whole sampling gun very heavy, and the installation, dismounting and debugging maintenance to sampling gun bring very big difficulty；And if
Once internal heating tape breaks down extremely difficult reparation.
Inventor proposes in the utility model, flue gas to be measured can be used to carry out heat tracing to sampling process in itself.Specifically make
Used time, a part of flue gas to be measured is entered by heat tracing flue gas inlet tube in exhaust gases passes, and left from heat tracing smoke outlet tube
Exhaust gases passes, because this partial fume and the flue-gas temperature to be measured in sampling pipe are essentially identical（Derive from boiler flue
Flue gas to be measured）, therefore exchanged heat in exhaust gases passes with the flue gas in sampling pipe, dissipating for flue gas heat in sampling pipe can be reduced
Stall rate, plus the auxiliary of certain insulation effect of lagging casing, it can largely prevent the temperature of flue gas in sampling pipe
Degree is rapid to be reduced, and can preferably prevent SO3Condensed in transmitting procedure.
The characteristics of sampling gun is to eliminate thick and heavy heat-insulation layer and internal heating tape, is carried out in itself using flue gas to be measured
Heat tracing, solves sampling gun heaviness, installation, dismounting and debugging maintenance are difficult, and if once internal heating tape breaks down
The problem of by extremely difficult reparation.On the other hand, it is used for heat tracing in itself using flue gas to be measured, takes full advantage of flue gas possessed itself
Heat, greatly reduce the energy expenditure needed for heat tracing.
The mode for making flue gas be flowed in exhaust gases passes has a lot, and simplest method for example stretches heat tracing flue gas inlet tube
Enter in boiler flue, set the equipment such as aspiration pump that the flue gas in flue is pumped into exhaust gases passes at heat tracing smoke outlet tube,
So that flue gas flows in exhaust gases passes.
As further improvement of the utility model, the lagging casing includes front end lagging casing and rear end insulation is outer
Shell, the front end lagging casing are arranged at the outside of front-end sampling pipe, the rear end lagging casing be arranged at filter cylinder cylinder and
The outside of rear end sampling pipe.Because easy dust stratification needs often to change, integrally-built lagging casing can cause sampling gun filter cylinder
The inconvenience that filter cylinder is changed（Such as need that filter cylinder could be changed after first lagging casing is dismantled）, the design side of this programme lagging casing
Formula is easy to carry out easy dismounting to sampling gun consequently facilitating the replacing of filter cylinder, and need to only pull down front-end sampling pipe during replacing can will
Filter cylinder is extracted out or installation, filter cylinder are changed very convenient.
More preferably, the front end lagging casing inside smoke passage passes through with rear end lagging casing inside smoke passage and connected
Pipe connects.In scheme above, due to two independent lagging casings, therefore it is also required on each lagging casing
Corresponding heat tracing flue gas inlet tube and heat tracing smoke outlet tube are set, and this will cause sampling gun complicated, while technique inconvenience
In control.Therefore inventor is connected the exhaust gases passes inside the lagging casing of front and rear end with communicating pipe, into rear end
（Or front end）The flue gas of lagging casing inside smoke passage can enter front end by communicating pipe（Or rear end）Cigarette inside lagging casing
In gas passage, and flowed out from heat tracing smoke outlet tube.
More preferably, in addition to it is arranged on outside lagging casing, for heating the heater of flue gas in exhaust gases passes.Due to
The utility model is eliminated using heat-insulation layer and heating tape, therefore the flue gas in exhaust gases passes necessarily has one in flow process
Determine the energy loss of degree（The external world is lost to mainly due to temperature to cause）.Therefore in order to further strengthen heat tracing effect, make
Flue-gas temperature in sampling pipe is constant, and this programme is adopted by setting heater to heat the flue gas in exhaust gases passes to supplement
Thermal loss during sample, but the control of the maintenance and technical process for the ease of sampling gun, should not be set heater
In exhaust gases passes, therefore heater is arranged on outside exhaust gases passes by this programme.Such as heater can be arranged on to heat tracing cigarette
On gas inlet tube, flue gas enters fashionable to be heated to it.Heater can also be arranged on communicating pipe, flue gas passes through communicating pipe
When it is heated.In this programme, the mode of temperature control lead can be set on corresponding flue gas circulation duct to detect
The temperature conditions of heat tracing flue gas, using the control foundation as heater.
It should be appreciated that the heating tape in heater and conventional method employed in this programme has fundamental difference,
The effect of heating tape is to directly heat the flue gas to be measured in sampling pipe, and it is the unique origin of heat of flue gas to be measured in sampling pipe.
And the purpose that the utility model sets heater is only to make up the energy loss of heat tracing flue gas, the purpose is to improve heat tracing effect
Fruit.This is also the reason for heater can be arranged on outside.
As further improvement of the utility model, the heat tracing flue gas inlet tube is communicated on the sampling pipe of rear end, described
Heat tracing smoke outlet tube is stretched into flue.As noted previously, as contain substantial amounts of solid dirt in flue gas, for a long time as heat tracing
Gas flows in exhaust gases passes easily causes exhaust gases passes dust stratification and blocking, and to prevent from blocking, inventor is by heat tracing flue gas
Inlet tube is communicated on the sampling pipe of rear end, and the flue gas for so entering rear end sampling pipe is all the clean cigarette filtered by filter cylinder
Gas, it is not easy to result in blockage.Inventor stretches into heat tracing smoke outlet tube in flue simultaneously so that the flue gas for completing heat tracing work leads to
Cross heat tracing gas vent return flue to enter in boiler, prevent flue gas to be leaked to the external world and pollute.
More preferably, the heat tracing flue gas inlet tube is communicated on the flue in sampling pump exit.In this programme, by
The flue gas in sampling pipe is derived from heat tracing flue gas, therefore under normal conditions, the air pressure in exhaust gases passes is more than boiler flue
Interior air pressure, therefore heat tracing flue gas can typically be flowed in exhaust gases passes automatically by pressure difference, be finally returned that in flue.But due to
The change of operating mode and difference, when negative pressure is excessive in flue, this pressure difference will reduce, and even resulting in heat tracing flue gas can not be in cigarette
Proper flow in gas passage（Although this case can be improved by being set at heat tracing smoke outlet tube the methods of aspiration pump,
But this undoubtedly makes sampling gun structure more complicated）.Therefore inventor proposes that heat tracing flue gas inlet tube can be communicated in into sampling pumps out
On the flue at mouthful place, providing pressure using sampling pump enables heat tracing flue gas in exhaust gases passes with the flowing of rational speed,
Ensure heat tracing effect.
On the other hand, due in such scheme, heat tracing flue gas inlet tube is to be connected on sampling pipe or flue gas stream to be measured
On threading a pipe, it is meant that the flue gas in a part of sampling pipe, which can enter in heat tracing flue gas inlet tube, turns into heat tracing flue gas, and this can
The sample flow in sampling pipe can be caused not reach testing requirement, therefore inventor sets flow to adjust on heat tracing flue gas inlet tube
Valve is saved to control the flow proportional of flue gas in two pipelines, ensures that sample flow reaches test request.
As further improvement of the utility model, heat tracing dividing plate is provided with the exhaust gases passes.Heat tracing dividing plate is set
Main purpose be to extend flowing time and path of the flue gas in exhaust gases passes, make the heat of heat tracing flue gas and flue gas in sampling pipe
Exchange is more abundant, to obtain more preferably heat tracing effect.
As further improvement of the utility model, pre-dedusting device is provided with front-end sampling pipe.When heat tracing flue gas from
When being introduced at the sampling pipe of rear end, part of smoke detects for terminal device in sampling pipe, and another part is used for heat tracing, to ensure
Flue gas flow for detection reaches testing requirements, need to increase flue gas total flow in sampling pipe.This passes through the flue gas of filter cylinder
Total flow increases, the increase of filter cylinder load, and this may cause during the unitary sampling filter cylinder dust stratification to increase so as to SO in flue gas3
Adsorbance increase, and then influence final detection result.Therefore inventors herein propose and born using pre-dedusting device to mitigate filter cylinder
The scheme of lotus, flue gas first flows through pre-dedusting device and gets rid of fraction solids dust, then is filtered through filter cylinder, is born so as to mitigate filter cylinder
Lotus, it is ensured that SO3Content detection is accurate.Also contribute to further purify heat tracing flue gas simultaneously, prevent exhaust gases passes dust stratification.It is described pre-
Dust arrester can use cyclone separator.
As further improvement of the utility model, the part that the sampling pipe is stretched into flue is inlet tube, it is described enter
Mouth pipe is formed by connecting by more segment pipes by connector.Entrance can be adjusted according to the depth of flue test position in this scenario
The length of pipe, realize boiler internal diverse location SO3The accurate detection of content.
Quartz glass or corundum can be selected in the material of pre-dedusting device described in the utility model and filter cylinder, to reduce material
Itself is to SO3Absorption.
The beneficial effects of the utility model are：1）A kind of efficient sulfur trioxide in flue gas sampling system is provided, is realized
Quick, the accurate detection of sulfur trioxide content in boiler smoke.2）Sampling gun structure is improved, the sampling gun is not provided with
Heat-insulation layer and heating tape, the weight and volume of sampling gun is greatly reduced, and beneficial to the fault restoration of sampling gun；And realize abundant
Heat tracing is carried out using the heat energy of flue gas, reduces heat tracing energy expenditure；Sampling gun overall structure is ingenious to simplify, easy to operate, is beneficial to
Industrially promote.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the sulfur trioxide sampling gun structural representation of prior art.
Fig. 3 is the sulfur trioxide sampling gun structural representation of embodiment two.
Fig. 4 is the sulfur trioxide sampling gun structural representation of embodiment three.
Fig. 5 is the sulfur trioxide sampling gun structural representation of example IV.
In figure mark for：A- sampling guns, b- condensate collection devices, c- absorption bottles, d- liquid drop separators, e- wet type flows
Meter, f- sampling pumps, 1- sampling pipes, 101- front-end sampling pipes, 102- rear ends sampling pipe, 2- filter cylinders, 3- lagging casings, 301- front ends
Lagging casing, 302- rear ends lagging casing, 4- exhaust gases passes, 5- heat tracing flue gas inlet tubes, 6- heat tracing smoke outlet tubes, 7- connections
Pipe, 8- heaters, 9- flow control valves, 10- heat tracing dividing plates, 11- pre-dedusting devices, 12- temperature control leads.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
Embodiment one：
As shown in figure 1, sulfur trioxide in flue gas sampling system includes sampling gun a, the condensation being sequentially connected by flue
Collection device b, absorption bottle c, liquid drop separator d, wet flow indicator e, sampling pump f.
Sampling gun a mainly ensures flue gas before condensing unit b is entered, and sulfur trioxide is not condensed, adsorbed in flue gas
Ensure that the flue gas under long-time measuring condition stably enters condensate collection device b simultaneously, condensate collection device b mainly ensures cigarette
The condensation of sulfur trioxide is without allowing condensation vapor in flue gas in gas；Absorption bottle c is primarily to reduce the titanium dioxide in flue gas
Harm of the sulphur to sampling pump and operating personnel, pernicious gas is absorbed；Liquid drop separator d main functions are in separating flue
Excess moisture；Wet flow indicator e and sampling pump f is mainly used for extracting flue gas and accurately measured.
In order to ensure the stable absorption of sulfur trioxide, the bath temperature optimum temperature of condensing unit is 65~80 DEG C, condensation
3~6mm of optimum diameter of collecting pipe, the optimum flow scope of sampling pump are 1~10L/min, measurement result stability and accurate
Degree is lifted on a large scale.
Embodiment two：
Fig. 3 illustrates second of embodiment of the present utility model, right in the present embodiment unlike embodiment one
The structure of sampling gun is transformed.As shown in Fig. 2 sampling gun of the present utility model includes sampling pipe 1 and is arranged at sampling pipe 1
On filter cylinder 2；Sampling pipe 1 is divided into front-end sampling pipe 101 and rear end sampling pipe 102, the end of rear end sampling pipe 102 by filter cylinder 2
It is connected with condensate collection device, condensate collection device is connected by flue with sampling pump；The sampling pipe 1 and filter cylinder 2
Outside is provided with lagging casing 3, and the lagging casing 3 has been internally formed exhaust gases passes 4, companion is provided with the lagging casing 3
Heat smoke inlet tube 5 and heat tracing smoke outlet tube 6.
In use, in the presence of aspiration pump, the flue gas in boiler flue is led to by heat tracing flue gas inlet tube 5 into flue gas
In road 4, and exhaust gases passes 4 are left from heat tracing smoke outlet tube 6, due to the flue-gas temperature base in this partial fume and sampling pipe 1
This is identical（Derive from the flue gas to be measured in boiler flue）, therefore changed in exhaust gases passes 4 with the flue gas in sampling pipe 1
Heat, the lost speed of flue gas heat in sampling pipe 1 can be reduced, can be plus the auxiliary of certain insulation effect of lagging casing 3
Largely preventing the temperature of flue gas in sampling pipe 1 reduces rapidly, can preferably prevent SO3Condensed in transmitting procedure.
It is characterized in eliminating thick and heavy heat-insulation layer and internal heating tape, carries out heat tracing in itself using flue gas to be measured, solve
Existing sampling gun of having determined is heavy, and installation, dismounting and debugging maintenance are difficult, and if once internal heating tape breaks down pole
The problem of hardly possible is repaired.On the other hand, it is used for heat tracing in itself using flue gas to be measured, takes full advantage of flue gas possessed heat itself
Amount, greatly reduces the energy expenditure needed for heat tracing.
Embodiment three：
Fig. 4 illustrates the third embodiment of the present utility model, unlike embodiment one, is incubated in this programme
Shell 3 is not an entirety, and two are divided into being arranged on the front end lagging casing 301 in the outside of front-end sampling pipe 101 and are arranged on
The cylinder of filter cylinder 2 and the rear end lagging casing 302 in the outside of rear end sampling pipe 102, the purpose so designed is to facilitate filter cylinder more
Change, front-end sampling pipe need to be only pulled down during replacing, open cartridge head, it is very convenient.Because this programme forms two solely
Vertical exhaust gases passes, therefore there is provided communicating pipe 7 connect two exhaust gases passes by inventor, it is therefore an objective to it is easy to the control of technique
Make and simplify sampling gun structure and the control of heat tracing flue-gas temperature in exhaust gases passes can also be easy to.
In addition, another feature of this programme is that heat tracing flue gas is not that exhaust gases passes are directly entered from boiler flue
4, in Fig. 4 it can be seen from heat tracing flue gas inlet tube 5 be provided in the terminal position of rear end sampling pipe 102, which ensures that
Heat tracing flue gas into exhaust gases passes 4 is all the clean flue gas filtered by filter cylinder 2, can effectively prevent the dust stratification of exhaust gases passes 4 from blocking up
Plug.Accordingly, because heat tracing flue gas is directed to the shunting of sampling pipe 1, to ensure that sample flow reaches test request, invention
People is provided with flow control valve 9 on heat tracing flue gas inlet tube 5, to control flue gas in sampling pipe 1 and heat tracing flue gas inlet tube 5
Flow-rate ratio.Meanwhile heat tracing smoke outlet tube 6 is directly accessed boiler flue, prevent heat tracing fume emission from causing dirt to the external world
Dye, the aspiration pump in exit provide power for the flowing of heat tracing flue gas.
In addition, in order to make up the thermal loss during heat tracing flow of flue gas, this programme is in heat tracing flue gas inlet tube 5 and even
Heater 8 is provided with siphunculus 7, to ensure the constant of heat tracing flue-gas temperature, strengthens heat tracing effect.Because heater 8 is set
In the outside of lagging casing 3, therefore it is easy to the fault restoration of sampling gun.Temperature control lead as shown in Figure 4 additionally can be set
12 monitor the temperature conditions of heat tracing flue gas in exhaust gases passes 4, the foundation controlled as heater 8.
Example IV：
Fig. 5 illustrates the 4th kind of embodiment of the present utility model, and from implementing unlike two, this programme leads in flue gas
Heat tracing dividing plate 10 is provided with road, extends path of the flue gas in exhaust gases passes 4, strengthens heat tracing effect.Additionally in front end
A pre-dedusting device 11 is added on probe tube 101（Cyclone separator）, flue gas first flows through pre-dedusting device 11 and gets rid of portion
Divide solid dirt, then filtered through filter cylinder 2, so as to mitigate the load of filter cylinder 2, it is ensured that SO3Content detection is accurate.Simultaneously also contribute into
One step purifies heat tracing flue gas, prevents the dust stratification of exhaust gases passes 4.
Heat tracing flue gas inlet tube 5 is connected with the flue in sampling pump exit in other this programme, it is therefore an objective to profit
Pressure difference is provided for the flowing of heat tracing flue gas with sampling pump, so can dispense heat tracing smoke outlet tube 6 according to actual conditions
Locate the setting of aspiration pump, simplify sampling gun structure.
The material of above-mentioned pre-dedusting device 11 and filter cylinder 2 preferably selects corundum or quartz glass, to reduce material in itself
Absorption to sulfur trioxide, improve accuracy in detection.
Claims (11)
1. sulfur trioxide in flue gas sampling system, it is characterised in that：The sulfur trioxide in flue gas sampling system includes passing through fume pipe
The sampling gun that road is sequentially connected（a）, condensate collection device（b）, absorption bottle（c）, liquid drop separator（d）, wet flow indicator（e）、
Sampling pump（f）.
2. sulfur trioxide in flue gas sampling system according to claim 1, it is characterised in that：The structure of the sampling gun is：
Including sampling pipe（1）Be arranged at sampling pipe（1）On filter cylinder（2）；Sampling pipe（1）By filter cylinder（2）It is divided into front-end sampling pipe
（101）With rear end sampling pipe（102）, the sampling pipe（1）And filter cylinder（2）Outside be provided with lagging casing（3）, the insulation
Shell（3）It has been internally formed exhaust gases passes（4）, the lagging casing（3）On be provided with heat tracing flue gas inlet tube（5）With heat tracing cigarette
Gas outlet（6）, flue gas can be from heat tracing flue gas inlet tube（5）Into exhaust gases passes（4）In, and from heat tracing smoke outlet tube（6）
Leave exhaust gases passes（4）.
3. sulfur trioxide in flue gas sampling system according to claim 2, it is characterised in that：The lagging casing（3）Including
Front end lagging casing（301）With rear end lagging casing（302）, the front end lagging casing（301）It is arranged at front-end sampling pipe
（101）Outside, the rear end lagging casing（302）It is arranged at filter cylinder（2）Cylinder and rear end sampling pipe（102）Outside.
4. sulfur trioxide in flue gas sampling system according to claim 2, it is characterised in that：The heat tracing flue gas inlet tube
（5）It is communicated in rear end sampling pipe（102）Or sampling pump（f）On the flue in exit, the heat tracing smoke outlet tube（6）Stretch
Enter in boiler flue.
5. sulfur trioxide in flue gas sampling system according to claim 3, it is characterised in that：The front end lagging casing
（301）Inside smoke passage and rear end lagging casing（302）Inside smoke passage passes through communicating pipe（7）Connection.
6. sulfur trioxide in flue gas sampling system according to claim 5, it is characterised in that：Also include being arranged on lagging casing
（3）Outside, for heating exhaust gases passes（4）The heater of middle flue gas（8）.
7. sulfur trioxide in flue gas sampling system according to claim 6, it is characterised in that：The heater（8）It is arranged at
Heat tracing flue gas inlet tube（5）And/or communicating pipe（7）On.
8. sulfur trioxide in flue gas sampling system according to claim 4, it is characterised in that：The heat tracing flue gas inlet tube
（5）On be provided with flow control valve（9）.
9. the sulfur trioxide in flue gas sampling system according to any claim in claim 2~8, it is characterised in that：Institute
State heat tracing smoke outlet tube（6）On be provided with aspiration pump.
10. the sulfur trioxide in flue gas sampling system according to any claim in claim 2~8, it is characterised in that：Institute
State exhaust gases passes（4）In be provided with heat tracing dividing plate（10）.
11. the sulfur trioxide in flue gas sampling system according to any claim in claim 2~8, it is characterised in that：Before
Hold sampling pipe（101）On be additionally provided with pre-dedusting device（11）.
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| CN201720798369.0U CN206891804U (en) | 2017-07-04 | 2017-07-04 | Sulfur trioxide in flue gas sampling system |
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| CN108303293A (en) * | 2018-02-09 | 2018-07-20 | 华能国际电力股份有限公司 | The sampling of sulfur trioxide and detecting system and method in a kind of fire coal boiler fume |
| CN108692997A (en) * | 2018-05-07 | 2018-10-23 | 西安交通大学 | A kind of flue gas droplet content test system and its flue gas drop sampler |
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| CN108303293A (en) * | 2018-02-09 | 2018-07-20 | 华能国际电力股份有限公司 | The sampling of sulfur trioxide and detecting system and method in a kind of fire coal boiler fume |
| CN108692997A (en) * | 2018-05-07 | 2018-10-23 | 西安交通大学 | A kind of flue gas droplet content test system and its flue gas drop sampler |
| CN109030122A (en) * | 2018-08-15 | 2018-12-18 | 山东国舜建设集团有限公司 | Wet flue gas condensation water sampler and method are saturated after a kind of wet desulphurization |
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| CN109060461A (en) * | 2018-08-30 | 2018-12-21 | 安徽省佳逸环保科技有限公司 | A kind of anti-clogging smoke dust sampling tube assembly |
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| CN111239327A (en) * | 2020-02-25 | 2020-06-05 | 宁夏恒承电力技术有限公司 | SO (SO)3Concentration testing method and device thereof |
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| CN111721591A (en) * | 2020-05-13 | 2020-09-29 | 华电电力科学研究院有限公司 | Device for heating desulfurized flue gas CEMS sampling pipe by utilizing flue gas waste heat |
| CN111487094A (en) * | 2020-05-25 | 2020-08-04 | 中煤科工集团重庆研究院有限公司 | SO in the exhaust gas3Detection preprocessing system and using method thereof |
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