CN206540759U - Online sample gas pretreating system - Google Patents
Online sample gas pretreating system Download PDFInfo
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- CN206540759U CN206540759U CN201720213212.7U CN201720213212U CN206540759U CN 206540759 U CN206540759 U CN 206540759U CN 201720213212 U CN201720213212 U CN 201720213212U CN 206540759 U CN206540759 U CN 206540759U
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- pipeline
- purge gas
- gas
- sample gas
- drying
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Abstract
The utility model provides online sample gas pretreating system, and it includes drying pipeline, blowback pipeline and fluid conduit, wherein：The drying pipeline sets gradually sample gas inlet, stop valve, automatic drainage filter, drying tube, dew point hygrometer, the outlet of sample gas；The blowback pipeline includes purge gas air inlet pipeline and purge gas outlet pipe, and the purge gas air inlet pipeline sets flowmeter, drier, compressed air inlet；The purge gas outlet pipe sets compressed air outlet, pressure regulation button, negtive-pressure implement.In the system, by the reasonable setting of drying pipeline, blowback pipeline, fluid conduit and control system, make in the online preprocessing process of sample gas, degranulation is removed from air-flow, acid mist, vapor are without losing analyte gas, and it does not interfere with SO2It is that accurate measurement provides safeguard Deng gas content.
Description
Technical field
The utility model is related to flue gas sample gas disposal technical field, specifically, is related to online sample gas pretreating system.
Background technology
Existing flue gas processing device to flue gas when carrying out on-line analysis, it usually needs flue gas sample gas is carried out necessary
Pretreatment, while the level of the sulfur dioxide and nitrogen oxides in sample gas is not influenceed, when standard condenser can not be dried to enough
Low dew point is to reduce during sour dew point, and traditional pretreatment system can not meet the requirement；On the other hand, in flue gas on-line continuous
In monitoring system, when need to be pre-processed to high flow capacity, high humility sample gas, acid mist, the moisture in gas in sample gas are effectively removed, together
When retain need monitor gas component, such as SO2、NO、CO、O2, the composition such as HCl and HF, be also traditional flue gas pretreatment
What system can not accomplish.
Utility model content
In order to solve the problem of current flue gas on-line continuous monitoring system is present, the utility model provides a kind of online sample gas
Pretreatment system, its specific technical scheme is as follows：
Online sample gas pretreating system, it includes drying pipeline, blowback pipeline and fluid conduit, wherein：
The drying pipeline include be sequentially connected sample gas inlet 2, stop valve 3, automatic drainage filter 4, drying tube 5,
Dew point hygrometer 6, sample gas outlet 7；
The blowback pipeline includes purge gas air inlet pipeline and purge gas outlet pipe, the purge gas air inlet pipe
Road sets compressed air inlet 16, drier 15, flowmeter 14；The purge gas outlet pipe sets negtive-pressure implement 13, pressure regulation
Button 9, compressed air outlet 8；The purge gas air inlet pipeline is connected to the dry of drying pipeline with purge gas outlet pipe
The two ends of dry pipe 5；
The fluid conduit has two-way：The automatic drainage filter 4 of drying pipeline, pipeline access jet are wherein started from all the way
Pump A10, the jet pump A10 set three-way interface, and one connects the pipeline drawn into automatic drainage filter 4；Two-way is run in water
Mouth A17；Purge gas outlet pipe is stated in threeway access；
Another road fluid conduit is drawn from purge gas outlet pipe, the pipe between negtive-pressure implement 13 and pressure regulation button 9
Set jet pump B11, the jet pump B11 that three-way interface, a logical and two-way access purge gas outlet pipe are set in road；Three
Lead to the mouth of a river B12 that runs in.
Further, heat tracing pipe 1 is set at the sample gas inlet 2.
Further, the system also includes PLC control system, and the gas dewpoint that the PLC system exports 7 to sample gas enters
Row monitoring, if dew point value is too high, PLC can produce alarm signal, and set PID control loops, adjust the temperature of drying tube 5
With the drainage period time interval of automatic drainage filter 4.
Online sample gas pretreating system provided by the utility model, with advantages below：
First：In the system, by the reasonable setting of drying pipeline, blowback pipeline, fluid conduit and control system, make sample
In the online preprocessing process of gas, degranulation is removed from air-flow, acid mist, vapor are without losing analyte gas, and it will not shadow
Ring SO2Content.In low sulfur content application, traditional condenser can lose up to 90% analyte gas, therefore cannot be used for
Accurate measurement, can not be used for minimum discharge monitoring and use；The system can retain 90% analyte gas, be accurate measurement
Provide safeguard.
Second:Purge gas in air enters after drier from the outlet of sample gas, can cool down the partially dried device.Reversely
Air-flow flows along drier, forms thermograde.When purge gas is by drier, preferable sample gas air inlet is reached by heating
Temperature.Thermograde can remove vapor rapidly, and reduce final dew point.If blowback air temperature begins to decline setting temperature
Below degree, System Backplane can be begun to warm up.The heat in backboard is passed to by aluminium heat block the package of drier.Purge gas
Flow through drier shell and heat is obtained from shell.The final temperature of purge gas, and the company of holding can be tightly controlled by this process
Continuous thermograde.
3rd：System provides the gas sampling of heat for high performance gas analysis.In the case where not losing gas molecule
Degranulation, acid mist and aqueous vapor are removed from gas.When water or aqueous vapor intrusion gas analyzer, due to blocking or corroding, many point
Analyzer can run into performance reduction and maintenance issues.System well below condensation point can remove moisture removal in temperature, can typically reach as little as-
25 DEG C of dew point.And the system can be directly mounted at flue, it is not necessary to heat pipeline.It can reach that explosion-proof environment occasion is used.
The product is continuous discharge and the choosing of process monitoring system CEMS ideal.
Brief description of the drawings
Fig. 1 is the gas circuit structure schematic diagram of the online sample gas pretreating system of the utility model.
Label in figure：
1:Heat tracing pipe；2：Sample gas inlet；3：Stop valve；4：Automatic drainage filter；5：Drying tube；6：Dew point hygrometer；7：Sample
Gas is exported；8：Compressed air outlet；9：Pressure regulation button；10：Jet pump A；11：Jet pump B；12：Discharge outlet B；13：Vacuum table；
14：Flowmeter；15：Drier；16：Compressed air inlet；17：Discharge outlet A.
Embodiment
Below in conjunction with the accompanying drawings and embodiment makees further details of theory to online sample gas pretreating system of the present utility model
It is bright.
Reference picture 1, online sample gas pretreating system, it includes drying pipeline, blowback pipeline and fluid conduit, wherein：Institute
State drying pipeline and set gradually sample gas inlet 2, stop valve 3, automatic drainage filter 4, drying tube 5, dew point hygrometer 6, the outlet of sample gas
7；Drying tube 5 is preferred to use membrane type drying tube, installed in the downstream of automatic drainage filter 4.Sample gas enters after drying tube 5, point
In the gas drying tube for flowing to several minor diameters, gas drying tube is arranged in parallel beam, is dried purge gas and is entered drier
Inversely dry membrane tube wall with gas afterwards to contact, selectively the vapor in sample gas is balanced from sample gas by osmotic distillation
And take out of.The difference that gas dries side steam partial pressure inside and outside periosteum drives the vapor in sample gas by tube wall, into drying
Purge gas in, as wet sample gas from air inlet flows to gas outlet, it is outer that moisture is constantly entered pipe by gas drying tube
Drying blowback air.Therefore sample gas is lowered by by its dew point during drier.
Dew point hygrometer 6 is used to protect the dew point inductor of sensitivity not damaged by corrosive gas and condensed water, in real time display
Dew point value, relative humidity/dew point and the temperature of sample gas, and in dew point>Alarm is produced at 5 DEG C.The one of electricity volt pressure of dew point hygrometer
Output is 0-5VDC, corresponding thereto be relative humidity (RH) in air chamber, another voltage output is 0-5VDC, with it
Corresponding is the temperature of gas indoor gas.These signals are transferred to PLC, and then PLC can be calculated according to corresponding calculation formula
Go out corresponding dew point value, and be shown on screen.If the numerical value detected is not in the range of PLC program settings,
System will send alarm signal.
The blowback pipeline includes purge gas air inlet pipeline and purge gas outlet pipe, the purge gas air inlet pipe
Road sets flowmeter 14, drier 15, compressed air inlet 16；The purge gas outlet pipe setting compressed air outlet 8,
Pressure regulation button 9, negtive-pressure implement 13；The purge gas air inlet pipeline is parallel to the drying of drying pipeline with purge gas outlet pipe
The two ends of pipe 5；The fluid conduit starts from the automatic drainage filter 4 of drying pipeline, and sets gradually three-way connection 11, jet
Pump A10, discharge outlet A17；Automatic drainage filter periodically removes the liquid and dust being collected into.Majority of case, these liquid
Usually acid mist and aerosol.Automatic drainage filter carries vacuum drainage performance.Compressed gas is passed through into text using jet pump
Mound pipe produces vacuum, is discharged the liquid collected on filter water trap using vacuum.This is a cyclic process, passes through PLC
Timer controls the on off state of magnetic valve, so as to control compressed gas supplying.The liquid mist being collected into must be discharged to by pipeline
The place of safety.It is recommended that liquid is discharged into the container containing lime stone chip, in order to neutralize the acid solution of discharge.
The blowback pipeline includes purge gas air inlet pipeline and purge gas outlet pipe, the purge gas air inlet pipe
Road sets compressed air inlet 16, drier 15, flowmeter 14；The purge gas outlet pipe sets negtive-pressure implement 13, pressure regulation
Button 9, compressed air outlet 8；The purge gas air inlet pipeline is connected to the dry of drying pipeline with purge gas outlet pipe
The two ends of dry pipe 5；
The fluid conduit has two-way：The automatic drainage filter 4 of drying pipeline, pipeline access jet are wherein started from all the way
Pump A10, the jet pump A10 set three-way interface, and one connects the pipeline drawn into automatic drainage filter 4；Two-way is run in water
Mouth A17；Purge gas outlet pipe is stated in threeway access；
Another road fluid conduit is drawn from purge gas outlet pipe, the pipe between negtive-pressure implement 13 and pressure regulation button 9
Set jet pump B11, the jet pump B11 that three-way interface, a logical and two-way access purge gas outlet pipe are set in road；Three
Lead to the mouth of a river B12 that runs in.
Protection filter can also be set in the purge gas outlet pipe.The protection filter is preferred to use 0.1 μ
M filtration cores, to remove the particulate and suspension of oiliness and acidity.Preferably tetrafluoro element filters core.The tolerable height of the part
Wet body.Except in addition to particulate, the element can also flocculate liquid suspension and droplet.Heat tracing pipe is set at the sample gas inlet 2
1, for being preheated with sample gas.The system also includes PLC control system, and the PLC system exports 7 gas dewpoint to sample gas
It is monitored, if dew point value is too high, PLC can produce alarm signal, and by pid control circuit, adjust the temperature of drying tube 5
With the drainage period time interval of automatic drainage filter 4.The system uses drying tube dehydration technique, and the technology can be direct
Extraction method is sampled at the beginning, and moisture is removed under gas phase state, it is to avoid sample air cooling is solidifying to form acid mist；Simultaneously because not producing cold
Solidifying water, therefore do not result in the loss of any composition soluble in water, such as SO2、NOX、HCL、HF。
It the foregoing is only better embodiment of the present utility model, it is all to be made according to present utility model application the scope of the claims
Equivalent changes and modifications, should all belong to the covering scope of the utility model patent.
Claims (3)
1. online sample gas pretreating system, it is characterised in that：It includes drying pipeline, blowback pipeline and fluid conduit, wherein：
The drying pipeline includes the sample gas inlet being sequentially connected（2）, stop valve（3）, automatic drainage filter（4）, drying tube
（5）, dew point hygrometer（6）, sample gas outlet（7）；
The blowback pipeline includes purge gas air inlet pipeline and purge gas outlet pipe, and the purge gas air inlet pipeline is set
Put compressed air inlet（16）, drier（15）, flowmeter（14）；The purge gas outlet pipe sets negtive-pressure implement（13）、
Pressure regulation button（9）, compressed air outlet（8）；The purge gas air inlet pipeline is connected to drying with purge gas outlet pipe
The drying tube of pipeline（5）Two ends；
The fluid conduit has two-way：The automatic drainage filter of drying pipeline is wherein started from all the way（4）, pipeline access jet pump
A（10）, the jet pump A（10）Three-way interface is set, and one connects into automatic drainage filter（4）The pipeline of extraction；Two connect
Discharge outlet A（17）；Purge gas outlet pipe is stated in threeway access；
Another road fluid conduit is drawn from purge gas outlet pipe, in negtive-pressure implement（13）With pressure regulation button（9）Between pipe
Jet pump B is set in road（11）, the jet pump B（11）Three-way interface, a logical and two-way access purge gas escape pipe are set
Road；Threeway connection discharge outlet B（12）.
2. online sample gas pretreating system according to claim 1, it is characterised in that：The sample gas inlet（2）Place is set
Heat tracing pipe（1）.
3. online sample gas pretreating system according to claim 1, it is characterised in that：The system also includes PLC and controls system
System, the PLC system is exported to sample gas（7）Gas dewpoint be monitored, if dew point value is too high, PLC can produce report
Alert signal, and PID control loops are set, adjust drying tube（5）Temperature and automatic drainage filter（4）Drainage period when
Between be spaced.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620316441 | 2016-04-17 | ||
| CN2016203164417 | 2016-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206540759U true CN206540759U (en) | 2017-10-03 |
Family
ID=59940953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720213212.7U Active CN206540759U (en) | 2016-04-17 | 2017-03-07 | Online sample gas pretreating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206540759U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333218A (en) * | 2018-04-13 | 2018-07-27 | 福建双环能源科技股份有限公司 | A kind of online gas detection analysis and filtration treatment system |
| CN108525423A (en) * | 2018-06-13 | 2018-09-14 | 锦州华冠环境科技实业股份有限公司 | Flue gas membrane type is dried system |
| CN109856186A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
-
2017
- 2017-03-07 CN CN201720213212.7U patent/CN206540759U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333218A (en) * | 2018-04-13 | 2018-07-27 | 福建双环能源科技股份有限公司 | A kind of online gas detection analysis and filtration treatment system |
| CN108525423A (en) * | 2018-06-13 | 2018-09-14 | 锦州华冠环境科技实业股份有限公司 | Flue gas membrane type is dried system |
| CN109856186A (en) * | 2019-02-01 | 2019-06-07 | 中国石油天然气集团公司 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
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