CN210199047U - On-line monitoring system for extracting polluted gas in soil remediation process - Google Patents
On-line monitoring system for extracting polluted gas in soil remediation process Download PDFInfo
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- CN210199047U CN210199047U CN201920551536.0U CN201920551536U CN210199047U CN 210199047 U CN210199047 U CN 210199047U CN 201920551536 U CN201920551536 U CN 201920551536U CN 210199047 U CN210199047 U CN 210199047U
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Abstract
The embodiment of the utility model discloses extract gaseous pollutants on-line monitoring system among soil remediation process, on-line monitoring system includes continuous collection monitoring system and automatic data acquisition system. The system can automatically monitor, measure and count the extracted gas phase part (non-methane total hydrocarbon, benzene and benzene series), can ensure that each item of data is timely, effectively and continuously monitored and recorded, can provide detailed and reliable data for project supervision, can also provide detailed data for later acceptance and can also establish an optimal scheme for next repair.
Description
Technical Field
The utility model relates to an environmental protection technical field, concretely relates to soil remediation in-process extracts gaseous pollutants on-line monitoring system.
Background
Contaminated soil remediation methods are numerous, and among them, the in situ remediation method is an important soil remediation method. Compared with other repairing methods, the in-situ repairing is more convenient and faster, and the repairing cost is saved. Firstly, the pollutants are directly decomposed or recovered without digging soil by a well setting mode and by means of chemistry, biology and the like, the operation and repair of the polluted site can be realized, and the method is very suitable for the polluted sites such as oil refineries, gas stations and the like. Secondly, the in-situ remediation does not need the transfer of the polluted soil, thereby reducing the secondary pollution.
The in-situ remediation technology of the polluted soil is mature day by day, and corresponding extraction technology can be selected in a targeted manner according to the current pollution situation of different sites, for example, the gas phase extraction technology and the multiphase extraction technology can be adopted for the soil polluted by light hydrocarbon and benzene series of petroleum.
In-situ gas phase extraction is an in-situ unsaturated zone soil remediation technology, a well is drilled on the ground surface, a well sleeve is used for filtering in the range of an underground polluted zone, the ground surface is sealed, a pipeline is installed at a well mouth and connected with extraction equipment, vacuum is formed through an extraction fan to generate vacuum pressure and pollutant concentration gradient, volatile organic matters in soil are extracted out of the ground surface, and then environmental protection treatment is carried out through a polluted gas treatment system.
In-situ multiphase extraction is also carried out by well drilling, arranging a filter screen underground for isolation, connecting a wellhead with an extraction device through a pipeline, and simultaneously pumping out gas and liquid in a polluted area, including volatile organic compounds (petroleum light hydrocarbon, benzene and benzene series), petroleum and non-aqueous phase liquid in soil from underground to the ground for environment-friendly treatment.
In the vapor extraction and multi-phase extraction processes, the amount of the produced polluted gas needs to be counted to master the environment condition of the repair site and the repair treatment effect, and the repair effect is evaluated, so that the method is an important step and means related to the progress of the whole repair project.
The corresponding schemes adopted in the prior art include:
1. monitoring by using handheld instruments such as a portable VOC detector, a portable gas chromatograph-mass spectrometer and the like;
2. and (5) detecting in a laboratory. And (4) sampling by using the gas sampling bag, and then sending the sample to a laboratory for assay to obtain various monitoring data.
Monitoring data can be obtained quickly by using a portable instrument for monitoring. The staff holds the portable instrument by hand to each sampling place to monitor, and can obtain various data rapidly. However, the portable instrument cannot realize continuous monitoring, and human errors are large.
The laboratory detects, uses the gas sampling bag sample, send laboratory chemical examination, can obtain accurate result. However, each assay is long, expensive, and cannot be continuously monitored, the sample may be exposed to air during the sampling process, and the human impact is large.
Accordingly, there is a need for improvements in existing detection means and systems to overcome the above-mentioned problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide an extract gaseous pollutants on-line monitoring system in soil repair process, this system can carry out automatic monitoring, measurement and statistics to the gaseous phase part (non-methane total hydrocarbon, benzene and benzene series thing) of extracting, can guarantee that each item data obtains timely, effective, continuous control and record, can provide detailed reliable data for the project management, also for the acceptance later provides detailed data, can also formulate the optimal scheme to repairing on next step. Therefore, the repair progress can be monitored in real time, the repair efficiency is improved, and the repair cost is saved.
In order to achieve the above object, an embodiment of the present invention provides an online monitoring system for extracting polluted gas in a soil remediation process, wherein the online monitoring system comprises a continuous collection monitoring system and an automatic data collection system.
Furthermore, the continuous acquisition monitoring system comprises an online gas chromatographic analyzer, a zero-order air generator, a hydrogen generator, a polluted gas analyzer, a polluted gas parameter measuring instrument, a polluted gas sampling box and a polluted gas heating sampling tube.
Furthermore, the online gas chromatographic analyzer comprises a gas chromatographic column box, a hydrogen flame ionization detector, a gas path control system and a computer control system. The online gas chromatographic analyzer adopts an exquisite structural design, and the size of a standard cabinet can completely meet the online use requirement.
The hydrogen Flame Ionization Detector (FID) is typically a destructive, mass type detector. The sample gas enters from the bottom of the combustion chamber and is mixed with hydrogen, the mixed gas and the entering oxygen (combustion-supporting air) are combusted, the temperature is about 2100 ℃, the organic matters entering the flame are subjected to pyrolysis and oxidation reaction to generate free radicals, the free radicals react with oxygen to generate ions, and the number of the generated ions is related to the mass of carbon atoms entering the flame in unit time. Under the action of an external electric field, the ions form an ion current which is in direct proportion to the concentration of the volatile organic compounds.
The hydrogen flame ionization detector is mainly characterized by having response to almost all volatile organic compounds, almost having equal response to all hydrocarbon compounds (carbon number is more than or equal to 3) and almost having equal relative response value to homologues (carbon number is more than or equal to 3) in hydrocarbon organic matters containing heteroatoms. The method brings great convenience for the quantification of the compound, and has the characteristics of high sensitivity, small base flow, wide linear range, small dead volume and quick response.
Gas Chromatography (GC) mainly uses differences in boiling point, polarity and adsorption properties of substances to separate mixtures. The sample gas is carried into the chromatographic column by carrier gas (high-purity nitrogen gas), the column contains a solid fixed phase, and because the boiling points, polarities or adsorption properties of all components in the sample gas are different, the components of the sample gas are repeatedly distributed or adsorbed/desorbed in motion due to the flowing of the carrier gas, so that the components with high concentration in the carrier gas flow out of the chromatographic column firstly, and flow out after the components with high concentration are distributed in the fixed phase, thereby realizing the component separation of the sample gas, and the separated components respectively enter the FID for measurement.
The zero order air generator is a device for purifying a source of air, which generates zero order air of less than 0.1ppm hydrocarbons (in methane) by catalytic cracking of total hydrocarbons in compressed air. In a heated catalyst containing a platinum palladium carrier, hydrocarbons are converted to carbon dioxide and water, providing clean, dry, hydrocarbon-free combustion air and aerodynamic switching of a ten-way valve for the FID detector.
Further, the pressure stability precision of the hydrogen generator is better than 0.001MPa, such as 0.0002-0.0008 MPa.
The hydrogen generator adopts a high-sensitivity fuzzy control system and an automatic flow tracking system, so that the pressure stability precision range is better than 0.001Mpa, and better performance is obtained. The electrolytic cell adopts transition metal element catalysis technology, and provides high-purity hydrogen for an online gas chromatographic analyzer through multi-stage purification, maintenance-free and automatic water supplement.
Further, the contaminated gas analyzer obtains the concentration of the contaminated gas by irradiating contaminated gas particles with a laser signal source.
The polluted gas analyzer adopts a laser backscattering test principle to complete the determination of the concentration of the polluted gas (dust) in the tested gas pipeline. A high-stability laser signal source embedded in the polluted gas analyzer penetrates through a pipeline to irradiate polluted gas (dust) particles, the irradiated polluted gas (dust) particles reflect laser signals, the intensity of the reflected signals and the concentration of the polluted gas (dust) are changed positively, and the concentration of the polluted gas (dust) in the pipeline can be obtained through calculation.
Further, the polluted gas parameter measuring instrument measures the temperature and the pressure in the polluted gas pipeline and the flow rate and the humidity of the polluted gas.
The polluted gas parameter measuring instrument is a four-in-one type multi-parameter measuring instrument, and can simultaneously measure the parameters in the polluted gas pipeline to obtain continuously recorded data.
Furthermore, the polluted gas sampling box comprises a stainless steel sampling probe, a titanium alloy filter, a self-constant temperature heater, a back-flushing gas tank and a back-flushing control electromagnetic valve.
And (3) the polluted gas enters a sampling heating pipe at the rear end of the sampling box through the stainless steel sampling probe and the titanium alloy filter, and the polluted gas is filtered and heated to more than 120 ℃. And a back-flushing gas tank and a back-flushing control electromagnetic valve are adopted to regularly and automatically back-flush the sampling probe and the titanium alloy filter, and a back-flushing heat tracing pipeline is regularly back-flushed, so that the smoothness and cleanness of the whole sampling path are ensured.
Further, the polluted gas heating sampling pipe comprises 2 polytetrafluoroethylene gas pipes, a temperature sensor, a heater and a heat insulation layer.
The pollution gas heating sampling pipe adopts PID heating control, the maximum heating temperature is 180 ℃, and the surface temperature is less than 55 ℃. The inside includes 2 polytetrafluoroethylene trachea, is used for sampling and full system calibration. By adopting a Pt100 temperature sensor, a heater and an insulating layer, for example, the difference between the temperature of each test point and the set temperature can be ensured to be less than 10% of the set value. The pressure resistance of the heating pipeline gas circuit in a cold state can reach more than 0.6 MPa.
The automatic data acquisition system is a monitoring and measurement system for temperature, pressure, flow, VOC and other parameters. And the data is analyzed through database software and configuration software, and a friendly human-computer interface is provided.
To the utility model discloses on-line monitoring system's specific system architecture, for example can also divide into field device, measurement rack subassembly, data acquisition and control system and gas processing system. The field equipment can comprise a polluted gas sampling probe, a polluted gas analyzer, a polluted gas back-blowing fan box, a temperature-pressure-flow three-in-one measuring instrument, a humidity measuring instrument, an oxygen sampling probe and the like; the measurement cabinet assembly can comprise an online gas chromatographic analyzer, a zero-level air generator, a hydrogen generator, a gas control distribution unit, an electrical control unit and the like and is responsible for measurement and control functions; the data acquisition and control system is a data acquisition and control unit and is responsible for controlling system processes such as system sampling, back flushing, alarming and the like; the gas treatment system comprises a freezing type air dryer, an air compressor, an automatic drainage box and the like, and instrument-level compressed air and standard gas are provided for the system.
The data acquisition and control system can adopt the combination of a PLC and an upper computer, the PLC is simultaneously communicated with the upper computer and the online gas chromatographic analyzer to finish the acquisition and report of pollutant concentration data, and the PLC is a core part of data acquisition; the upper computer carries on the online monitoring system software, realize the function such as acquisition, display, storage, processing, transmission, generating report form, printing of the data; and it can support, for example, the HJ/T212 protocol, enabling environmentally friendly office networking.
The embodiment of the utility model provides a still provide a soil remediation in-process extraction gaseous pollutants on-line monitoring method, the method is including using above arbitrary kind the on-line monitoring system carries out the step monitored to gaseous pollutants.
In particular, the method comprises the following steps:
(1) the method comprises the following steps that (1) polluted gas in a pipeline enters a polluted gas sampling box under the action of a suction pump, and the polluted gas sampling box filters and heats the polluted gas to 120 ℃;
(2) heating the whole sampling pipeline through a polluted gas heating sampling pipe; the polluted gas analyzer directly analyzes the concentration of the polluted gas, and measures parameters including the temperature and the pressure in the polluted gas pipeline and the flow rate and the humidity of the polluted gas through a polluted gas parameter measuring instrument;
(3) the filtered and heated polluted gas enters an online gas chromatography analyzer, the components of the polluted gas are separated by the gas chromatography, and the separated polluted gas is combusted by a hydrogen Flame Ionization Detector (FID) to obtain the concentration of each component.
Wherein, the zero-level air generator provides clean and dry combustion-supporting air without hydrocarbon and aerodynamic force switched by the ten-way valve for the FID detector; the hydrogen generator provides high-purity hydrogen for the online gas chromatographic analyzer.
Furthermore, the method also comprises the step of uniformly sorting the data of each part through an automatic data acquisition system.
The utility model discloses on-line monitoring system and method have following advantage:
1. the utility model discloses on-line monitoring system uses hydrogen flame ion detector, and the key feature is all responded to almost all volatile organic compounds, and the response to all hydrocarbon compounds (the carbon number is more than or equal to 3) is almost equal, also almost equals to the relative response value of homologue (the carbon number is more than or equal to 3) in the hydrocarbon organic matter that contains the heteroatom. The method brings great convenience for the quantification of the compound, and has the characteristics of high sensitivity, small base flow, wide linear range, small dead volume and quick response.
2. The monitoring system of the embodiment of the utility model is controlled by a computer, which ensures the reliability and repeatability of the instrument; the method can ensure that each item of data is effectively monitored and recorded in time, and provides comprehensive guarantee for the subsequent data analysis and scheme formulation of each product.
3. The monitoring system of the embodiment of the utility model realizes the increase and decrease of the equipment and the setting of the alarm threshold value; the system can be monitored in real time all day long and also can be monitored at fixed points; and provides two different monitoring modes: automatic monitoring and manual monitoring.
4. The utility model discloses monitoring system provides the outage and restarts the function: when the instrument is powered up, the instrument can automatically enter a measuring state; the power-off protection function: the set parameters and measurement results of the instrument are not lost in case of long-term power failure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic structural diagram of an online monitoring system for extracting contaminated gas in a soil remediation process provided by an embodiment of the utility model.
Fig. 2 is a schematic flow chart of an online monitoring method for extracting contaminated gas in a soil remediation process provided by an embodiment of the present invention.
Wherein the reference numerals are:
101. a contaminated gas sampling probe; 102. a contaminated gas analyzer; 103. a polluted gas back-blowing fan box; 104. a temperature, pressure and flow three-in-one measuring instrument; 105. a humidity measuring instrument; 106. an oxygen sampling probe; 107. an oxygen analyzer; 201. an online gas chromatography analyzer; 202. a zero-order air generator; 203. a hydrogen generator; 204. a gas control distribution unit; 205. an electrical control unit; 206. a condenser; 207. a control panel; 208. an air circuit breaker panel; 209. a first peristaltic pump; 210. a second peristaltic pump; 211. a water storage tank; 212. a liquid discharge tank; 213. a UPS battery pack; 301. a data acquisition and control unit; 401. a refrigerated air dryer; 402. an air compressor; 403. an automatic drainage tank; 501. a distribution box between the devices; 601. a suction duct; 602. a contaminated gas sampling box; 603. the contaminated gas heats the sampling tube.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, a schematic structural diagram of an online monitoring system for extracting contaminated gas in a soil remediation process according to an embodiment of the present invention is shown. The on-line monitoring system comprises field equipment, a measuring cabinet assembly, a data acquisition and control system and a gas processing system. The field equipment comprises a polluted gas sampling probe 101, a polluted gas analyzer 102, a polluted gas back blowing fan box 103, a temperature-pressure-flow three-in-one measuring instrument 104, a humidity measuring instrument 105, an oxygen sampling probe 106, an oxygen analyzer 107 and the like; the collected data is collected by the probes, the measuring instruments, and the analyzers to the contaminated gas analyzer 102.
The measurement cabinet assembly comprises an online gas chromatographic analyzer 201, a zero-level air generator 202, a hydrogen generator 203, a gas control distribution unit 204, an electric control unit 205, a condenser 206, a control panel 207 and the like and is responsible for measurement and control functions; the electric control unit 205 is controlled by the air circuit breaker panel 208; the condenser 206 receives the sample gas from the contaminated gas sampling probe 101 and discharges the liquid to a drain tank 212 by means of two peristaltic pumps 209, 210; the waste liquid and exhaust gas generated in the hydrogen generator 203 and the on-line gas chromatograph 201 are also discharged to the drain tank 212. Raw water is also supplied to the hydrogen generator through a water storage tank 211. Further, the gas control distribution unit 204 receives the zero calibration gas and the span calibration gas supplied from the outside, and supplies the calibration gas to the contaminated gas sampling probe 101. The pipelines of the sample gas and the calibration gas are heated by a heat tracing pipe and controlled by a control panel 207, and the control panel 207 is also connected with the polluted gas analyzer 102 by controlling the temperature of a probe. The electric control unit 205 controls the pollution gas analyzer 102 by heat tracing pipe heating, blowback control, probe heating, and the latter exchanges the temperature, pressure, flow, humidity, oxygen, and dust signals obtained by analysis with the electric control unit 205. The electrical control unit 205 also performs backup power supply through the UPS battery pack 213.
The data acquisition and control system is a data acquisition and control unit 301 and is responsible for controlling system processes such as system sampling, back flushing, alarming and the like; which can transmit signals to telecommunications and equipment and other external devices such as printers and the like.
The gas treatment system includes a refrigerated air dryer 401, an air compressor 402, an automatic drain tank 403, etc., provides instrument-level compressed air and standard gas to the system, and is powered through an inter-plant power distribution box 501.
The data acquisition and control unit 301 can adopt a combination of a PLC and an upper computer, the PLC is simultaneously communicated with the upper computer and the online gas chromatographic analyzer 201 to finish the acquisition and report of pollutant concentration data, and the PLC is a core part of data acquisition; the upper computer carries on the online monitoring system software, realize the function such as acquisition, display, storage, processing, transmission, generating report form, printing of the data; and it can support, for example, the HJ/T212 protocol, enabling environmentally friendly office networking.
The utility model discloses on-line monitoring system is used for the automatic monitoring of volatile organic compounds (including non-methane total hydrocarbon, benzene and benzene series thing) etc. and measures parameters such as gas flow rate, temperature simultaneously. The monitoring and measurement of total hydrocarbons, methane and benzene series are completed by adopting the technology of ten-way valve double-tube quantification, chromatographic separation and hydrogen Flame Ionization Detector (FID).
The sampling pump collects a sample to be detected into the quantitative tube, the sample enters the chromatographic column for separation under the pushing of carrier gas, then respectively enters the FID detector and is mixed with hydrogen gas, the mixed gas and the entering oxygen (air) are combusted, and organic matters are ionized in hydrogen flame to form ionic current. The magnitude of the ionic current is proportional to the concentration of the organic matter. The concentration of each component of volatile organic compounds (including non-methane total hydrocarbons, benzene and benzene series) can be respectively obtained.
The technical indexes and performances of the system are as follows:
1. condition of contaminated gas
Temperature: less than or equal to 300 ℃;
pressure: -6kPa to 1 kPa;
flow rate: less than or equal to 40 m/s;
humidity: less than or equal to 40 percent.
2. Environmental conditions
Indoor ambient temperature: 15-35 ℃; outdoor ambient temperature: -20 ℃ to 50 ℃;
atmospheric pressure: 86kPa to 106 kPa;
relative humidity: less than or equal to 85 percent;
3. system requirements
Power supply voltage: AC220V ± 22V (AC 380V is used for larger power consumption);
power supply frequency: 50Hz +/-1 Hz;
rated power consumption: 10000VA (varying depending on heating line length and air compressor configuration);
the dew point of the instrument gas is less than or equal to 4 ℃, the pressure is more than or equal to 0.6MPa, and the flow rate is 2Nm 3/h.
4. Technical index
4.1 non-methane Total hydrocarbons NMHC
Measurement range: 0-300X 10-6 (customizable);
analysis period: less than or equal to 2 min;
detection limit: less than or equal to 0.5 multiplied by 10 < -6 > (calculated by carbon);
qualitative reproducibility: less than or equal to 2 percent (calculated by carbon);
quantitative reproducibility: less than or equal to 2 percent (calculated by carbon);
indicating value error: less than or equal to +/-10 percent;
zero drift: less than or equal to +/-5 percent;
range drift: less than or equal to +/-5 percent;
4.2, component analysis
Measurement of the components: benzene, toluene, m-xylene, p-xylene, o-xylene, 1,2, 3-trimethylbenzene, 1,2, 4-trimethylbenzene, 1,3, 5-trimethylbenzene, ethylbenzene, styrene, and the like, which can be customized;
measurement range: 0-300X 10-6 (customizable);
analysis period: less than or equal to 40min (different analysis periods according to different customized components);
detection limit: less than or equal to 0.5 multiplied by 10 < -6 > (calculated by benzene);
qualitative reproducibility: less than or equal to 3 percent (calculated by benzene);
quantitative reproducibility: less than or equal to 3 percent (calculated by benzene);
indicating value error: less than or equal to +/-10 percent;
zero drift: less than or equal to +/-5 percent;
range drift: less than or equal to +/-5 percent;
4.3, temperature
Measurement range: 0-250/500 ℃;
basic error: less than or equal to plus or minus 0.5 percent;
4.4, pressure
Measurement range: -6- +1 KPa;
basic error: less than or equal to plus or minus 0.5 percent;
4.5 flow rate
Measurement range: 0 to 30/40 m/s;
precision: less than or equal to +/-5 percent;
4.6, humidity
Measurement range: 0-40% V/V;
precision: less than or equal to +/-2 percent.
The online monitoring system is connected with a polluted gas pipeline for real-time monitoring, can ensure that various data (non-methane total hydrocarbon, benzene and benzene series) are monitored and recorded timely, effectively and continuously, and provides comprehensive guarantee for subsequent data analysis and scheme making.
Example 2
As shown in fig. 2, a schematic flow chart of the online monitoring method for extracting contaminated gas in the soil remediation process according to an embodiment of the present invention is shown.
The method comprises the following steps:
(1) the polluted gas in the suction pipeline 601 enters a polluted gas sampling box 602 under the action of a suction pump, and the polluted gas sampling box 602 filters and heats the polluted gas to 120 ℃;
(2) the whole sampling pipeline is heated by a polluted gas heating sampling pipe 603; the contaminated gas analyzer 102 directly analyzes the concentration of the contaminated gas and measures parameters including the temperature and pressure in the contaminated gas pipeline and the flow rate and humidity of the contaminated gas by the contaminated gas parameter measuring instruments 104, 105;
(3) the filtered and heated contaminated gas enters an online gas chromatograph 201, the gas chromatograph separates the contaminated gas components, and a hydrogen Flame Ionization Detector (FID) burns the separated contaminated gas to obtain the concentration of each component.
(4) The data acquisition and control unit 301 is used to arrange the data of each part uniformly.
Wherein, the zero-level air generator 202 provides clean and dry combustion air without hydrocarbon and aerodynamic force switched by the ten-way valve for the FID detector; the hydrogen generator 203 provides high purity hydrogen gas for an on-line gas chromatograph.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (7)
1. An on-line monitoring system for extracting polluted gas in the soil remediation process is characterized in that the on-line monitoring system comprises a continuous acquisition monitoring system and an automatic data acquisition system,
the continuous acquisition monitoring system comprises an online gas chromatographic analyzer, a zero-order air generator, a hydrogen generator, a polluted gas analyzer, a polluted gas parameter measuring instrument, a polluted gas sampling box and a polluted gas heating sampling tube.
2. The on-line monitoring system of claim 1, wherein the on-line gas chromatograph comprises a gas chromatographic column box, a hydrogen flame ionization detector, a gas path control system, and a computer control system.
3. The on-line monitoring system of claim 2, wherein the pressure stability accuracy of the hydrogen generator is better than 0.001 Mpa.
4. The on-line monitoring system of claim 3, wherein the contaminated gas analyzer obtains the concentration of the contaminated gas by irradiating particles of the contaminated gas with a laser signal source.
5. The on-line monitoring system of claim 4, wherein the contaminated gas parameter measurement instrument measures the temperature, pressure, and flow rate and humidity of the contaminated gas within the contaminated gas pipeline.
6. The on-line monitoring system of claim 5, wherein the contaminated gas sampling box comprises a stainless steel sampling probe, a titanium alloy filter, a self-thermostatic heater, a blowback gas tank, and a blowback control solenoid valve.
7. The on-line monitoring system of claim 6, wherein the contaminated gas heating sampling tube comprises 2 polytetrafluoroethylene gas tubes, a temperature sensor, a heater and an insulating layer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917082A (en) * | 2019-04-22 | 2019-06-21 | 北京金隅红树林环保技术有限责任公司 | Extraction stain gas on-line monitoring system and method during a kind of soil remediation |
| CN113570230A (en) * | 2021-07-21 | 2021-10-29 | 上海亚新建设工程有限公司 | Contaminated land parcel restoration site informatization management method and system |
-
2019
- 2019-04-22 CN CN201920551536.0U patent/CN210199047U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917082A (en) * | 2019-04-22 | 2019-06-21 | 北京金隅红树林环保技术有限责任公司 | Extraction stain gas on-line monitoring system and method during a kind of soil remediation |
| CN113570230A (en) * | 2021-07-21 | 2021-10-29 | 上海亚新建设工程有限公司 | Contaminated land parcel restoration site informatization management method and system |
| CN113570230B (en) * | 2021-07-21 | 2022-06-28 | 上海亚新城市建设有限公司 | Contaminated land parcel restoration site informatization management method and system |
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