CN112326374A - Portable waste gas sampling and metering system and method - Google Patents
Portable waste gas sampling and metering system and method Download PDFInfo
- Publication number
- CN112326374A CN112326374A CN202011282225.2A CN202011282225A CN112326374A CN 112326374 A CN112326374 A CN 112326374A CN 202011282225 A CN202011282225 A CN 202011282225A CN 112326374 A CN112326374 A CN 112326374A
- Authority
- CN
- China
- Prior art keywords
- gas
- oil
- vacuum pump
- flow
- free vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 42
- 239000002912 waste gas Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 136
- 230000001105 regulatory effect Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims description 29
- 239000003344 environmental pollutant Substances 0.000 claims description 23
- 231100000719 pollutant Toxicity 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 2
- 238000004868 gas analysis Methods 0.000 claims description 2
- 238000007791 dehumidification Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Images
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
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/005—Valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明公开了一种便携式废气采样计量系统及方法，包括样气管道、气体干燥器、样气管道、流量调节阀、气体流量计、电磁阀、无油真空泵、废气排气口、处理器及触控显示屏；样气管道的出口与气体干燥器的入口相连通，气体干燥器的出口经流量调节阀与气体流量计的入口相连通，气体流量计的出口经电磁阀与无油真空泵的入口相连通，无油真空泵的出口与废气排气口相连通，处理器与流量调节阀、气体流量计、电磁阀及无油真空泵相连接，处理器与触控显示屏相连接，该系统及方法能够准确控制废气流量及采集的总废气量，且便于搬运。
The invention discloses a portable waste gas sampling and measuring system and method, comprising a sample gas pipeline, a gas dryer, a sample gas pipeline, a flow regulating valve, a gas flow meter, a solenoid valve, an oil-free vacuum pump, a waste gas exhaust port, a processor and a Touch screen; the outlet of the sample gas pipeline is connected with the inlet of the gas dryer, the outlet of the gas dryer is connected with the inlet of the gas flowmeter through the flow regulating valve, and the outlet of the gas flowmeter is connected with the oil-free vacuum pump through the solenoid valve. The inlet is connected, the outlet of the oil-free vacuum pump is connected with the exhaust gas exhaust port, the processor is connected with the flow regulating valve, the gas flow meter, the solenoid valve and the oil-free vacuum pump, the processor is connected with the touch screen, the system and the The method can accurately control the flow rate of exhaust gas and the total amount of exhaust gas collected, and is easy to handle.
Description
Technical Field
The invention belongs to the technical field of pollutant control, and relates to a portable waste gas sampling and metering system and a method.
Background
The waste gas discharged from coal-fired boilers, metallurgy, waste incineration and fixed pollution sources in the chemical industry contains partial pollutants of various pollutants such as SO2、NOXThe flow and the like can display the content of the discharged pollutants on line in real time, and the on-line monitoring data and the like can basically reflect the discharge concentration and the discharge total amount of the corresponding pollutants; but part of the contaminants, e.g. SO3The online monitoring means such as HCl, condensable particles, dioxin and the like are deficient or the monitoring accuracy does not meet the requirements, so that the online monitoring of the emission concentration cannot be realized.Even if the pollutants with online concentration monitoring are realized, because the online monitoring sampling point can not reflect the concentration distribution of each part of the emission cross section in real time, the representativeness of online monitoring sampling and the accuracy of online monitoring data need to be compared and checked manually at regular intervals, the exhaust gas needs to be extracted, sampled and analyzed manually no matter the online monitoring pollutant concentration is checked or the pollutant concentration which is not monitored online is tested, and the flow control precision of the extracted exhaust gas and the accuracy of the collected total exhaust gas quantity have great influence on the measurement result of the field manual measurement of the pollutant concentration. The existing waste gas sampling and metering device for manually monitoring the concentration of pollutants on site has the following defects: 1) the volume flow of waste gas sampling is small, and the metering error of a common flowmeter is large; 2) the air extraction rate is not accurately controlled, and the fluctuation is large, so that the collection efficiency of the sampling equipment on pollutants is influenced; 3) the air extraction sampling metering equipment has a complex dispersion system, high operation requirement and easy fault occurrence and influences progress; 4) the site conditions are complex, the test position is high, and the instrument is time-consuming and labor-consuming to carry.
In order to improve the accuracy of the manual monitoring result of the pollutant emission concentration and enable the test result to represent the actual emission level of pollutants, the accuracy of analyzing and measuring the pollutant sample needs to be improved, and the accuracy of sampling and controlling the waste gas for measuring the pollutant concentration during manual field monitoring and the accuracy of measuring the amount of the sampled waste gas need to be improved. The on-site sampling metering device which is suitable for high-precision metering of low-flow gas and accurate in sampling flow control is developed, and the accuracy of a pollutant concentration measuring result monitored manually is improved; the sampling metering device is portable and flexible, can realize high intelligence and is easy to operate, and not only can greatly reduce the working intensity of field testing personnel, but also can reduce the human error of the field working personnel. Therefore, it is necessary to develop a portable integrated intelligent flow control and metering method and system for small-flow gas, which is suitable for manual sampling and monitoring of the concentration of pollutants in exhaust gas.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art, and providing a portable exhaust sampling and metering system and method, which can accurately control the flow rate of exhaust gas and the total amount of exhaust gas to be collected, and is convenient for transportation.
In order to achieve the purpose, the portable waste gas sampling and metering system comprises a sample gas pipeline, a gas dryer, a sample gas pipeline, a flow regulating valve, a gas flowmeter, an electromagnetic valve, an oil-free vacuum pump, a waste gas exhaust port, a processor and a touch display screen;
the export of appearance gas pipeline is linked together with the entry of gas desicator, and the export of gas desicator is linked together through flow control valve and gas flowmeter's entry, and gas flowmeter's export is linked together through solenoid valve and oil-free vacuum pump's entry, and oil-free vacuum pump's export is linked together with the exhaust gas vent, and the treater is connected with flow control valve, gas flowmeter, solenoid valve and oil-free vacuum pump, and the treater is connected with the touch-control display screen.
And a temperature monitoring instrument is arranged at an inlet of the gas dryer and is connected with the processor.
And a gas pressure monitoring instrument is arranged at an outlet of the oil-free vacuum pump, wherein the gas pressure monitoring instrument is connected with the processor.
The processor is connected with the flow regulating valve, the gas flowmeter, the electromagnetic valve and the oil-free vacuum pump through a first data line.
The processor is connected with the touch display screen through a second data line.
A portable exhaust gas sampling and metering method comprises the following steps:
the user inputs the set target sampling flow through the touch display screen, the electromagnetic valve, the flow regulating valve and the oil-free vacuum pump are opened simultaneously, the rotating speed of the oil-free vacuum pump is gradually increased, the sample gas after waste gas analysis or pollutant absorption enters the gas dryer through the sample gas pipeline for drying and dehumidifying treatment, then enters the gas flowmeter through the flow regulating valve for testing the gas flow and the total accumulated passing gas amount in a time period, then enters the oil-free vacuum pump through the electromagnetic valve, the sample gas output by the oil-free vacuum pump is discharged through the waste gas exhaust port, in the process, the processor regulates the opening degree of the flow regulating valve, the opening degree of the electromagnetic valve and the rotating speed of the oil-free vacuum pump according to the gas flow detected by the gas flowmeter and the set target sampling flow, so that the gas flow detected by the gas flowmeter is the same as the set target sampling flow, after the test is finished, the processor reads the total amount of the gas detected by the gas flowmeter and accumulated to pass through, and then the total amount of the gas is displayed through the touch display.
The invention has the following beneficial effects:
the portable waste gas sampling and metering system and the method of the invention suck the sample gas through the oil-free vacuum pump during the specific operation, the processor controls the flow regulating valve, the electromagnetic valve and the oil-free vacuum pump according to the sample gas flow detected by the gas flowmeter and the set target sampling flow, namely, the combination of coarse adjustment and fine adjustment is adopted, so that the sample gas flow is quickly equal to the set target sampling flow, the pollutant sampling or absorbing device connected at the front end is favorable for trapping pollutants, the pollutant sampling accuracy of the device is improved, after the test time is over, the processor reads the total gas amount accumulated by the sample gas flowmeter and displays the total gas amount through the touch display screen, thereby realizing the accurate control of the waste gas flow and the total collected waste gas amount, and the system has simple structure, convenient carrying and transportation, high integration and intellectualization, and reduces the requirement on the operation proficiency of field testers, human errors in the testing process are effectively reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is the touch-control display screen, 2 is the treater, 3 is temperature monitoring instrument, 4 is the gas desicator, 5 is flow control valve, 6 is gas flowmeter, 7 is gas pressure monitoring instrument, 8 is the solenoid valve, 9 is the oil-free vacuum pump, 10 is exhaust gas port.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the portable exhaust gas sampling and metering system of the present invention includes a sample gas pipeline, a gas dryer 4, a sample gas pipeline, a flow regulating valve 5, a gas flowmeter 6, an electromagnetic valve 8, an oil-free vacuum pump 9, an exhaust gas exhaust port 10, a processor 2 and a touch display screen 1; the export of appearance gas pipeline is linked together with the entry of gas desicator 4, and the export of gas desicator 4 is linked together through flow control valve 5 and gas flowmeter 6's entry, and gas flowmeter 6's export is linked together through solenoid valve 8 and oil-free vacuum pump 9's entry, and oil-free vacuum pump 9's export is linked together with exhaust gas vent 10, and treater 2 is connected with flow control valve 5, gas flowmeter 6, solenoid valve 8 and oil-free vacuum pump 9, and treater 2 is connected with touch display screen 1.
A temperature monitoring instrument 3 is arranged at an inlet of the gas dryer 4, and the temperature monitoring instrument 3 is connected with the processor 2; and a gas pressure monitoring instrument 7 is arranged at the outlet of the oil-free vacuum pump 9, wherein the gas pressure monitoring instrument 7 is connected with the processor 2.
The processor 2 is connected with the flow regulating valve 5, the gas flowmeter 6, the electromagnetic valve 8 and the oil-free vacuum pump 9 through a first data line; the processor 2 is connected with the touch display screen 1 through a second data line.
The portable waste gas sampling and metering method comprises the following steps:
the sample gas after being analyzed by waste gas or absorbed by pollutants enters a gas dryer 4 through a sample gas pipeline, wherein the processor 2 monitors the gas temperature at the inlet of the gas dryer 4 through a temperature monitoring instrument 3, the sample gas is dried and dehumidified through the gas dryer 4, then the flow of the sample gas is regulated through a flow regulating valve 5 and then is input into the flow regulating valve 5, the gas flow and the total accumulated passing gas in the testing time period are measured through a gas flowmeter 6, the sample gas output by the gas flowmeter 6 is subjected to secondary regulation through an electromagnetic valve 8 and then enters an oil-free vacuum pump 9, and finally the sample gas is discharged through a waste gas exhaust port 10;
when the sampling device works, a user inputs a set target sampling flow through the touch display screen 1, simultaneously opens the electromagnetic valve 8, the flow regulating valve 5 and the oil-free vacuum pump 9, gradually increases the rotating speed of the oil-free vacuum pump 9, obtains the temperature, the flow and the pressure of the sample gas, and regulates the opening degree of the electromagnetic valve 8, the opening degree of the flow regulating valve 5 and the rotating speed of the oil-free vacuum pump 9 according to the flow detection value of the sample gas, so that the flow detected by the gas flowmeter 6 is equal to the set target sampling flow until the sampling is finished, displays the total amount of the sample gas through the touch display screen 1, closes the electromagnetic valve 8 and the flow regulating valve 5, and simultaneously stops transporting;
in the sampling process, detect the temperature and the pressure of appearance gas through temperature monitoring instrument 3 and gas pressure monitoring instrument 7, when the temperature of appearance gas exceedes preset temperature range or when the pressure of appearance gas exceedes preset pressure range, then the initiative closes solenoid valve 8, stops transporting oil-free vacuum pump 9 simultaneously to the realization is to measuring equipment's protection.
It should be noted that the present invention takes into full account the gas principal component, e.g., O, during the gas flow measurement process2、N2And CO2And the like, and meanwhile, the flow control accuracy is improved, so that the gas flow metering accuracy is high, the integration level is high, the device is portable, the artificial error in the test process is reduced, and the working strength of instrument carrying is reduced.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282225.2A CN112326374A (en) | 2020-11-16 | 2020-11-16 | Portable waste gas sampling and metering system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282225.2A CN112326374A (en) | 2020-11-16 | 2020-11-16 | Portable waste gas sampling and metering system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112326374A true CN112326374A (en) | 2021-02-05 |
Family
ID=74318809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011282225.2A Pending CN112326374A (en) | 2020-11-16 | 2020-11-16 | Portable waste gas sampling and metering system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112326374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115686092A (en) * | 2022-11-15 | 2023-02-03 | 陕西森兰安全科技有限公司 | Fluid flow adjusting device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5000052A (en) * | 1989-05-17 | 1991-03-19 | Sipin Anatole J | Controlled sampler |
| CN103913355A (en) * | 2014-04-05 | 2014-07-09 | 青岛共好检测技术有限公司 | Sampler for multi-channel gases and particulate matters and using method of sampler |
| CN204085969U (en) * | 2014-10-13 | 2015-01-07 | 北京市环境保护科学研究院 | Gasoloid isokinetic sampling device in speed change air-flow |
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN208270307U (en) * | 2018-06-05 | 2018-12-21 | 上海清如环保科技有限公司 | A kind of online CEMS pretreatment system |
| CN109856222A (en) * | 2018-12-29 | 2019-06-07 | 浙江全世科技有限公司 | A kind of boiler smoke on-line monitoring system |
| CN110243638A (en) * | 2019-05-17 | 2019-09-17 | 华电电力科学研究院有限公司 | A flue gas collection device and method for SCR denitrification device |
| CN111537293A (en) * | 2020-05-13 | 2020-08-14 | 西安热工研究院有限公司 | A system and method for sampling and measuring HCl and/or HBr |
| CN213456320U (en) * | 2020-11-16 | 2021-06-15 | 西安热工研究院有限公司 | Portable waste gas sampling measurement system |
-
2020
- 2020-11-16 CN CN202011282225.2A patent/CN112326374A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5000052A (en) * | 1989-05-17 | 1991-03-19 | Sipin Anatole J | Controlled sampler |
| CN103913355A (en) * | 2014-04-05 | 2014-07-09 | 青岛共好检测技术有限公司 | Sampler for multi-channel gases and particulate matters and using method of sampler |
| CN204085969U (en) * | 2014-10-13 | 2015-01-07 | 北京市环境保护科学研究院 | Gasoloid isokinetic sampling device in speed change air-flow |
| CN105181395A (en) * | 2015-09-10 | 2015-12-23 | 麦克传感器股份有限公司 | Multifunctional intelligent portable air sampler and detecting method thereof |
| CN208270307U (en) * | 2018-06-05 | 2018-12-21 | 上海清如环保科技有限公司 | A kind of online CEMS pretreatment system |
| CN109856222A (en) * | 2018-12-29 | 2019-06-07 | 浙江全世科技有限公司 | A kind of boiler smoke on-line monitoring system |
| CN110243638A (en) * | 2019-05-17 | 2019-09-17 | 华电电力科学研究院有限公司 | A flue gas collection device and method for SCR denitrification device |
| CN111537293A (en) * | 2020-05-13 | 2020-08-14 | 西安热工研究院有限公司 | A system and method for sampling and measuring HCl and/or HBr |
| CN213456320U (en) * | 2020-11-16 | 2021-06-15 | 西安热工研究院有限公司 | Portable waste gas sampling measurement system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115686092A (en) * | 2022-11-15 | 2023-02-03 | 陕西森兰安全科技有限公司 | Fluid flow adjusting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108956876B (en) | A Measurement Time Delay Correction Method of Flue Gas Online Continuous Monitoring System | |
| JP3187434B2 (en) | Method and apparatus for supplying diluted exhaust gas to an exhaust emission analyzer | |
| CN105334147B (en) | Particulate matter on-line monitoring system and method based on β ray methods and light scattering method | |
| CN109765154B (en) | On-line calibration system and calibration method of PM2.5/PM10 light scattering particle monitor | |
| US8531671B1 (en) | Apparatus and methods for determining the concentration of black carbon particles in a combustion exhaust | |
| CN103091134A (en) | Dilution sampling system and sampling method of fixed source particles and volatile organic compounds | |
| CN109030304A (en) | A kind of flue gas minimum discharge micronic dust detection system and detection method | |
| US7343782B2 (en) | System and method for performing quantifiable release spore testing on bioaerosol detection technologies | |
| CN201749074U (en) | Device capable of realizing real-time measurement of cigarette smoke aerosol | |
| CN104777006A (en) | Device for testing dust generation and device and method for evaluating purification effect | |
| CN107356458A (en) | A kind of online air detection sample drying and control system | |
| CN213456320U (en) | Portable waste gas sampling measurement system | |
| CN107132314A (en) | A kind of olfactory sensor array detection equipment and Artificial Olfactory device | |
| CN203231899U (en) | Filter field test bench applied to general ventilation | |
| USH1757H (en) | Method and apparatus for automated isokinetic sampling of combustor flue gases for continuous monitoring of hazardous metal emissions | |
| CN110749706A (en) | A plant canopy volatile organic matter flux measurement device and method | |
| CN202661356U (en) | Instrument for monitoring tiny particulate matters in air | |
| CN1704746A (en) | Device for collecting and monitoring particles of solid source discharged gas | |
| AU753085B3 (en) | Assembly and method for mixing gases | |
| CN206440580U (en) | Airborne dust monitoring system volume control device | |
| CN112326374A (en) | Portable waste gas sampling and metering system and method | |
| CN110849679A (en) | A synchronous sampling device for condensable particulate matter and sulfur trioxide in coal-fired flue gas and its working method | |
| CN203011801U (en) | Online detection device applicable to particulate matters in high-pressure gas pipeline | |
| CN210347252U (en) | Smoke and dust flue gas atmosphere detection device | |
| CN204439428U (en) | A kind of PM2.5 source resolution sampling apparatus based on multidiameter delay FEEDBACK CONTROL |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |