CN220207212U - Monitoring system for assisting industrial enterprise in traceability of emission of volatile organic compounds - Google Patents
Monitoring system for assisting industrial enterprise in traceability of emission of volatile organic compounds Download PDFInfo
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- CN220207212U CN220207212U CN202320399193.7U CN202320399193U CN220207212U CN 220207212 U CN220207212 U CN 220207212U CN 202320399193 U CN202320399193 U CN 202320399193U CN 220207212 U CN220207212 U CN 220207212U
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 39
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 157
- 238000005070 sampling Methods 0.000 claims abstract description 67
- 239000002912 waste gas Substances 0.000 claims abstract description 22
- 239000003570 air Substances 0.000 claims description 104
- 238000001514 detection method Methods 0.000 claims description 25
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 claims description 22
- 239000012080 ambient air Substances 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 10
- 239000003463 adsorbent Substances 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 150000002894 organic compounds Chemical class 0.000 claims 1
- 239000010815 organic waste Substances 0.000 abstract description 22
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000010220 Pearson correlation analysis Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A monitoring system for assisting industrial enterprise volatile organic compound emission traceability belongs to the field of atmospheric environment monitoring and treatment. The system utilizes a fixed source waste gas sampling module and a sensitive point location environment air sampling module to synchronously collect organic waste gas of each pollution source and sensitive point location, and through buffer storage setting, component concentration of volatile organic compounds of each emission source and sensitive point location is monitored step by step, so as to assist in identifying possible environmental risks in the industrial enterprise production process. The system has the advantages of simple structure, convenience in use and convenience in maintenance, can quickly help industrial enterprises and environmental management departments, effectively and automatically identify the emission source of volatile organic compounds, greatly improves the efficiency of environmental management, and simultaneously reduces the leakage safety risk possibly existing in the process of using organic raw materials for enterprises.
Description
Technical Field
The utility model belongs to the field of atmospheric environment monitoring and treatment, and particularly relates to a monitoring system for assisting industrial enterprises in tracing the emission of volatile organic compounds.
Background
Volatile organic compounds (Volatile Organic Compounds, VOCs) are used as precursors for generating organic aerosols and ozone, and become an important pollution source for influencing the improvement of the quality of the environmental air in China. Meanwhile, the components of the substances are complex, and the substances generally have strong pungent smell, and are the main sources of various environmental information visit cases. A great deal of research shows that the current VOCs pollution in China mainly comes from the industrial field. However, the production process of industrial enterprises is complex, the links related to the use of organic raw materials are numerous, and the emission of VOCs can be generated in the synthetic production of any product and the storage and transfer of raw materials. Especially for the nodes which relate to VOCs emission in fine chemical industry, petrochemical industry and other industries, even tens of thousands are reached. Under the condition, once the problems of abnormal terminal treatment facilities, insufficient supervision, failure of sewage disposal facilities and the like occur, the problems can cause the out-of-standard emission of VOCs, and further the risks are formed for the peripheral areas of industrial enterprises, the sensory stimulation of peripheral residents is caused, the health hazard is formed, and meanwhile, the improvement of the regional ambient air is deeply influenced. However, due to poor visibility of VOCs emission, strong correlation among emission sources, high pollution transmission speed and changeable paths, the high emission point of VOCs is difficult to be found in time. The high intensity VOCs emitted by the sensitive spot cannot be rapidly correlated to each pollution source, resulting in a relatively delayed improvement of the ambient air. Therefore, a set of monitoring system for assisting the traceability of the emission of the volatile organic compounds of the industrial enterprises is developed, and the pollution sources of the volatile organic compounds of the sensitive points are accurately identified based on the monitoring data, so that the monitoring system has important significance for the environmental management work of the industrial enterprises.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a monitoring system for assisting the traceability of the emission of volatile organic compounds of industrial enterprises.
The utility model adopts the technical scheme that: the monitoring system for assisting the industrial enterprise volatile organic compound emission traceability is technically characterized by comprising a fixed source waste gas sampling module and a gas chromatography-mass spectrometry analyzer, wherein the fixed source waste gas sampling module comprises a filter cylinder for receiving volatile organic compound waste gas from a fixed pollution source, the filter cylinder is connected with a cache gas tank through a pipeline, and the cache gas tank is connected with a gas pump communicated with the atmospheric environment through a pipeline; a first group of air valve switches for controlling whether the cache gas tank is in air intake or not are respectively arranged on an inlet end pipeline and an outlet end pipeline of the cache gas tank; the fixed source waste gas detection module comprises a carrier gas bottle, the carrier gas bottle is connected with the inlet end of the buffer gas tank through an output pipeline and used for taking out gas in the buffer gas tank, a pressure stabilizing valve and a gas flowmeter are arranged on a connecting pipeline of the carrier gas bottle and the buffer gas tank, and the output port of the buffer gas tank is connected with the input port of the gas mass spectrometer GC-MS through a pipeline and used for enabling the gas output in the buffer gas tank to enter the gas mass spectrometer GC-MS.
In the scheme, the system further comprises a sensitive point location ambient air sampling module and a sensitive point location ambient air detection module, wherein the sensitive point location ambient air sampling module comprises another filter cylinder connected with the sensitive point location ambient air, the other filter cylinder is connected with the input end of a sampling pipe through a pipeline, the output end of the sampling pipe is connected with another air pump communicated with the atmospheric environment through a pipeline, a second group of air valve switches for controlling whether the sampling pipe is in air intake or not are respectively arranged on the pipeline at the inlet end and the outlet end of the sampling pipe, a three-way valve is arranged on a connecting pipeline between the air valve switch at the inlet of the sampling pipe and is connected with an air blowing branch through the three-way valve, the three-way valve is connected with a high-purity air bottle of the air blowing branch through a pipeline, and an air valve switch for controlling whether high-purity air enters the sampling pipe is arranged on a connecting pipeline of the high-purity air bottle and the three-way valve; the sensitive point location environment air detection module comprises a sensitive point location air carrying bottle, an output pipeline of the sensitive point location air carrying bottle is connected with an inlet of a sampling tube after passing through a pressure stabilizing valve, a gas flowmeter and a pipeline heater, an outlet of the sampling tube is connected with an input port of a gas chromatography-mass spectrometry (GC-MS) through a pipeline, and a third group of gas valve switches for controlling whether gas in the sampling tube enters the gas chromatography-MS are also arranged at the inlet and the outlet of the sampling tube.
In the scheme, the system further comprises a plurality of other fixed source waste gas sampling modules, and pipelines connected with the air pump output ports in the other waste gas sampling modules are connected with each other through three-way valves and then connected with the atmosphere through the pipelines.
In the above scheme, the output pipeline of the fixed source exhaust gas detection module is connected with the output port of the buffer gas tank in each other fixed source exhaust gas detection module through a plurality of three-way valves.
In the scheme, the sampling tube is filled with the adsorbent for enriching the organic matters in the sensitive point positions.
In the scheme, a fan for cooling the thermally desorbed sampling tube is arranged outside the sampling tube.
The beneficial effects of the utility model are as follows: according to the monitoring system for the emission traceability of the volatile organic compounds of the auxiliary industrial enterprises, organic waste gas of each pollution source and each sensitive point location is synchronously collected by the fixed source waste gas sampling module and the sensitive point location environment air sampling module, and the component concentration of the volatile organic compounds of each emission source and each sensitive point location is monitored step by step through cache setting, so that the possible environmental risk in the production process of the industrial enterprises is identified in an auxiliary mode. The system has the advantages of simple structure, convenience in use and convenience in maintenance, can quickly help industrial enterprises and environmental management departments, effectively and automatically identify the emission source of volatile organic compounds, greatly improves the efficiency of environmental management, and simultaneously reduces the leakage safety risk possibly existing in the process of using organic raw materials for enterprises.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a monitoring system for assisting in tracing the emission of volatile organic compounds from industrial enterprises according to an embodiment of the present utility model;
the numbers in the figures are illustrated as follows: 1-1 first filter cartridge, 1-2 second filter cartridge, 1-3 third filter cartridge, 1-4 fourth filter cartridge, 2-1 first buffer gas tank, 2-2 second buffer gas tank, 2-3 third buffer gas tank, 2-4 sampling tube, 3-1 first air pump, 3-2 second air pump, 3-3 third air pump, 3-4 fourth air pump, 4-1 first pressure gauge, 4-2 second pressure gauge, 4-3 third pressure gauge, 4-4 fourth pressure gauge, 5-1 gas carrying bottle, 5-2 high purity air bottle, 6 pressure stabilizing valve, 7 gas flowmeter, 8-pipe heater, 9 fan, 10-1 first gas valve switch, 10-2 second gas valve switch, 10-3 third gas valve switch, 10-4 fourth gas valve switch, 10-5 fifth gas valve switch 10-6 sixth air valve switch, 10-7 seventh air valve switch, 10-8 eighth air valve switch, 10-9 ninth air valve switch, 10-10 tenth air valve switch, 10-11 eleventh air valve switch, 10-12 twelfth air valve switch, 10-13 thirteenth air valve switch, 10-14 fourteenth air valve switch, 10-15 fifteenth air valve switch, 10-16 sixteenth air valve switch, 10-17 seventeenth air valve switch, 11-1 first three-way valve, 11-2 second three-way valve, 11-3 third three-way valve, 11-4 fourth three-way valve, 11-5 fifth three-way valve, 11-6 sixth three-way valve, 11-7 seventh three-way valve, 11-8 eighth three-way valve, 11-9 ninth three-way valve, 11-10 thirteenth pass valve.
Detailed Description
The foregoing objects, features, and advantages of the utility model will be more readily apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings 1 and detailed description.
The monitoring system for the emission traceability of the volatile organic compounds of the auxiliary industrial enterprises in the embodiment comprises a fixed source waste gas sampling module, a fixed source waste gas detection module, a sensitive point location environment air sampling module, a sensitive point location environment air detection module, a gas chromatography-mass spectrometry analyzer and the like.
The fixed source exhaust gas sampling module in this embodiment includes a first filter cartridge 1-1, organic exhaust gas discharged from the fixed pollution source 1 enters the first filter cartridge 1-1, the first filter cartridge 1-1 is connected with a first buffer gas tank 2-1 through a connecting pipeline, and a third gas valve switch 10-3 is arranged on the connecting pipeline close to the gas inlet of the first buffer gas tank 2-1. The first buffer gas tank 2-1 is connected with the first air pump 3-1 through a pipeline, a fourth air valve switch 10-4 is arranged on the pipeline close to the outlet end of the first buffer gas tank 2-1, and organic waste gas flows through the first air pump 3-1 and the first pressure gauge 4-1 and is discharged to the atmosphere.
The same connection mode is adopted in the embodiment, and other fixed pollution sources can be synchronously sampled in parallel. For example, the organic waste gas discharged from the fixed pollution source 2 enters the second filter cartridge 1-2, the second filter cartridge 1-2 is connected with the second buffer gas tank 2-2 through a connecting pipeline, and a seventh gas valve switch 10-7 for controlling the on-off of the pipeline is arranged on the connecting pipeline close to the gas inlet of the second buffer gas tank 2-2. The second buffer gas tank 2-2 is connected with the second air pump 3-2 through a pipeline, an eighth air valve switch 10-8 is arranged on the pipeline close to the outlet end of the second buffer gas tank 2-2, and the organic waste gas flows through the second air pump 3-2 and the second pressure gauge 4-2 and is discharged to the atmosphere. In this embodiment, the organic waste gas discharged from the fixed pollution source 3 enters the third filter cartridge 1-3, the third filter cartridge 1-3 is connected with the third buffer gas tank 2-3 through a connecting pipeline, and an eleventh gas valve switch 10-11 for controlling the on-off of the pipeline is arranged on the connecting pipeline close to the gas inlet of the third buffer gas tank 2-3. The third buffer gas tank 2-3 is connected with the third air pump 3-3 through a pipeline, a twelfth air valve switch 10-12 is arranged on the pipeline close to the outlet end of the third buffer gas tank 2-3, and the organic waste gas is discharged to the atmosphere after flowing through the third air pump 3-3 and the third pressure gauge 4-3. In this embodiment, only three pipeline structures for fixing pollution sources are used for illustration, and a user can add other fixed pollution sources as required, and the arrangement mode is basically consistent with the above.
In this embodiment, a special gas path is also provided for treating the organic waste gas at the sensitive point. The sensitive point location generally refers to a space position which is easy to cause human sensory stimulation or has high standard requirements on the quality of the ambient air, and comprises an office area of an enterprise, a dormitory of staff, a canteen and the like. Organic waste gas output by a sensitive point position enters a fourth filter cylinder 1-4, the fourth filter cylinder 1-4 is connected with a sampling tube 2-4 through a connecting pipeline, the sampling tube 2-4 is connected with a fourth air pump 3-4 through a pipeline, a fifteenth air valve switch 10-15 and a seventh three-way valve 11-7 are arranged on the pipeline close to the outlet end of the fourth filter cylinder 1-4, a c port of the seventh three-way valve 11-7 is connected with a high-purity air cylinder 5-2 through a pipeline, and a seventeenth air valve switch 10-17 is further arranged on the connecting pipeline of the seventh three-way valve 11-7 and the high-purity air cylinder 5-2. The organic waste gas flows through the fourth air pump 3-4 and the fourth pressure gauge 4-4 and is discharged to the atmosphere.
In this embodiment, the output ends of the first air pump 3-1, the second air pump 3-2, the third air pump 3-3 and the fourth air pump 3-4 are communicated with each other through pipelines to provide a channel for discharging organic waste gas to the atmosphere, and the specific structure is as follows: the output pipeline of the first air pump 3-1 is also provided with an eighth three-way valve 11-8, the output pipeline of the second air pump 3-2 is provided with a ninth three-way valve 11-9, and the output pipeline of the third air pump 3-3 is provided with a tenth three-way valve 11-10. The output pipeline of the first air pump 3-1 is connected to the a port of the eighth three-way valve 11-8, the c port of the eighth three-way valve 11-8 is communicated with the atmospheric environment, and the b port of the eighth three-way valve 11-8 is connected with the c port of the ninth three-way valve 11-9 through a pipeline; the port b of the ninth three-way valve 11-9 is connected with the port c of the thirteenth three-way valve 11-10 through a pipeline, and the port b of the tenth three-way valve 11-10 is connected with the output pipeline of the fourth air pump 3-4 through a pipeline. The structure realizes the synchronous collection of the organic waste gas of each pollution source and the sensitive point location, and enables different pollution sources to enter respective buffer gas tanks, thereby creating conditions for the follow-up step-by-step monitoring of volatile organic compounds of each emission source and the sensitive point location.
In the exhaust gas detection module of this embodiment, a gas carrying bottle 5-1 is connected with a first buffer gas bottle 2-1 through a pipeline, a first three-way valve 11-1 is arranged on the pipeline, a pressure stabilizing valve 6 and a gas flowmeter 7 are sequentially arranged on the pipeline connected with the gas carrying bottle 5-1 at an a port of the first three-way valve 11-1, a c port of the first three-way valve 11-1 is connected with the first buffer gas bottle 2-1 through a pipeline, a first gas valve switch 10-1 is arranged near an input port of the first buffer gas bottle 2-1, the first gas valve switch 10-1 is connected with the buffer gas bottle 2-1, a b port of the first three-way valve 11-1 is connected with a sampling pipe 2-4 through a pipeline heater 8, a second three-way valve 11-2 and a fourth three-way valve 11-4 are sequentially arranged on a connecting pipeline of the first three-way valve 11-1 and the pipeline heater 8, a thirteenth gas valve switch 10-13 is arranged near an inlet of the sampling pipe 2-4, a fourteenth gas valve switch 10-14 is arranged near an outlet of the sampling pipe, and a fourteenth gas valve switch 10-14 is connected with a sixth gas valve 11-6 through a port of the pipeline heater 11-4; the pipeline near the outlet end of the first buffer gas tank 2-1 is provided with a second gas valve switch 10-2, the first buffer gas tank 2-1 is connected with a gas chromatography-mass spectrometry analyzer GC-MS through the pipeline, the pipeline of the first buffer gas tank 2-1 and the GC-MS is connected with the a port of the fifth three-way valve 11-5 through the a port and the c port of the third three-way valve 11-3, the c port of the fifth three-way valve 11-5 is connected with the a port of the sixth three-way valve 11-6, and the c port of the sixth three-way valve 11-6 is connected with the input end of the gas chromatography-MS.
The embodiment can also realize the step-by-step detection of the organic waste gas with multiple pollution sources, for example, the c port of the second three-way valve 11-2 in the embodiment is connected with the input port of the second buffer gas tank 2-2 through a pipeline, the pipeline close to the input port of the buffer gas tank 2-2 is provided with the fifth gas valve switch 10-5, and the output end of the second buffer gas tank 2-2 is connected with the b port of the third three-way valve 11-3 through a pipeline, so that the gas in the gas carrying bottle 5-1 is conveyed into the second buffer gas tank 2-2 after passing through the pressure stabilizing valve 6, the gas flowmeter 7, the first three-way valve 11-1 and the second three-way valve 11-2. The port c of the fourth three-way valve 11-4 is connected with the input port of the third buffer gas tank 2-3 through a pipeline, a ninth gas valve switch 10-9 is arranged on the pipeline close to the input port of the third buffer gas tank 2-3, and the output end of the third buffer gas tank 2-3 is connected with the port b of the fifth through valve 11-5 through a pipeline and is used for inputting the gas in the gas carrying bottle 5-1 into the third buffer gas tank 2-3 after passing through the pressure stabilizing valve 6, the gas flowmeter 7, the first three-way valve 11-1, the second three-way valve 11-2 and the fourth three-way valve 11-4.
When the sensitive point position organic waste gas is detected, gas in the gas carrying bottle 5-1 enters the sampling tube 2-4 through the pressure stabilizing valve 6, the gas flowmeter 7, the pipeline heater 8 and the thirteenth air valve switch 10-13, and then the sampling tube 2-4 enters the gas mass spectrometer (GC-MS) through the fourteenth air valve switch 10-14 and the c port of the sixth three-way valve 11-6 for volatile organic compound component concentration analysis. Meanwhile, high-purity air 5-2 enters the sampling tube 2-4 through a seventeenth air valve switch 10-7 and a seventh three-way valve 11-7 to purge the sampling tube 2-4.
In the exhaust gas detection module of this embodiment, the sampling tube 2-4 is filled with an adsorbent for enriching the organic matters at the sensitive point.
In the exhaust gas detection module of this embodiment, the sampling tube 2-4 is externally provided with a fan 9 for cooling the thermally desorbed sampling tube.
In the GC-MS of the gas chromatography-mass spectrometry analyzer, the concentration of the volatile organic compound components of the pollution source and the sensitive point are monitored by the gas chromatography-mass spectrometry analyzer by means of a computer, and the volume percentage of the volatile organic compound components of each pollution source and each sensitive point is obtained through data maximum normalization; the pearson correlation analysis is adopted to obtain the correlation between the sensitive point location and the emission of each pollution source; and calculating the contribution rate of each pollution source to the sensitive point location by combining with the PMF model. All of the above methods are conventional in the art for treating the concentration of components.
The working process of the volatile organic compound emission system of the industrial enterprise in the embodiment is as follows:
the waste gas sampling module synchronously collects organic waste gas of a pollution source and a sensitive point, the pollution source organic waste gas 1 firstly removes particles in the waste gas through a filter cylinder 1-1 under the action of an air pump 3-1, the particles flow into a buffer gas tank 2-1, third and fourth air valve switches 10-3 and 10-4 are distributed on two sides of the buffer gas tank 2-1, and after the buffer gas tank 2-1 is filled with gas, the gas enters the air pump 3-1 and is connected with a pressure gauge 4-1, and then is discharged to the atmosphere; when the pressure gauge 4-1 reaches the set value, the third air valve 10-3 and the fourth air valve 10-4 are closed, the air pump 3-1 stops running, and the pollution source waste gas 1 is stored in the buffer gas tank 2-1. According to the same connection mode, the synchronous collection of the organic waste gas with multiple pollution sources can be realized. When the concentration of the organic waste gas at the sensitive point is far lower than that of a pollution source, under the action of a fourth air pump 3-4, the ambient air at the sensitive point firstly removes particles in the waste gas through a filter cylinder 1-4, flows into a sampling pipe 2-4, is filled with an adsorbent in the sampling pipe 2-4, enriches the organic waste gas at the sensitive point, fifteenth air valve switches 10-15 and sixteenth air valve switches 10-16 are distributed on two sides of the sampling pipe 2-4, and after the organic enrichment of the gas filled in the sampling pipe 2-4, the air enters the fourth air pump 3-4, is connected with a fourth pressure gauge 4-4 and is then discharged to the atmosphere.
The waste gas detection module sends the collected organic waste gas of the pollution source and the sensitive point position into a gas chromatography-mass spectrometry (GC-MS) step by step, and the specific implementation process is as follows: the carrier gas pressure stabilizing valve 6 is opened, carrier gas in the carrier gas cylinder 5-1 sequentially passes through the pressure stabilizing valve 6, the gas flowmeter 7, the first three-way valve 11-1 and the first gas valve switch 10-1, pollution source waste gas stored in the buffer gas cylinder 2-1 is carried out, and the carrier gas is sent to a gas chromatography-mass spectrometry (GC-MS) for detection after passing through the second gas valve switch 10-2, the third three-way valves 11-3, the fifth three-way valve 11-5 and the sixth three-way valve 11-6. After the detection period is finished, the first air valve switch 10-1 and the second air valve switch 10-2 are closed, the fifth air valve switch 10-5 and the sixth air valve switch 10-6 are opened, and the gas carrying bottle 5-1 sends the second path of pollution source waste gas into a gas chromatography-mass spectrometry (GC-MS) for detection. According to the same manner, the stepwise detection of multi-pollution source organic waste gas can be realized. When the sensitive point position organic waste gas is detected, the gas carrying bottle 5-1 sequentially passes through the pressure stabilizing valve 6, the gas flowmeter 7, the pipeline heater 8 and the thirteenth air valve switch 10-13 to enter the sampling tube 2-4, wherein the gas carrying bottle is heated in the pipeline heater 8, so that the organic matters enriched in the sampling tube are completely blown out from the adsorption medium, and enter the gas chromatography-mass spectrometry (GC-MS) for detection analysis after passing through the fourteenth air valve switch 10-14 and the sixth three-way valve 11-6. After the detection period is finished, the thirteenth air valve switch 10-13 and the fourteenth air valve switch 10-14 are closed, the seventeenth air valve switch 10-17 and the sixteenth air valve switch 10-16 are opened, so that the high-purity air in the high-purity air cylinder 5-2 enters the sampling tube 2-4 to purge the adsorbent and is discharged into the atmosphere, and meanwhile, the fan 9 is used for cooling the sampling tube 2-4. After the detection of each path of gas by a gas chromatography-mass spectrometry (GC-MS) is finished, the obtained VOCs component and concentration information are delivered to a computer for traceable analysis, the method comprises the steps of processing the concentration of the volatile organic components of the pollution source and the sensitive point, which are obtained by monitoring by the gas chromatography-mass spectrometry, and obtaining the volume percentage of the volatile organic components of each pollution source and the sensitive point through data maximum normalization; the pearson correlation analysis is adopted to obtain the correlation between the sensitive point location and the emission of each pollution source; and calculating the contribution rate of each pollution source to the sensitive point location by adopting a PMF model.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (6)
1. The monitoring system for assisting the industrial enterprise volatile organic compound emission traceability is characterized by comprising a fixed source waste gas sampling module, a fixed source waste gas detection module and a gas chromatography-mass spectrometry analyzer, wherein the fixed source waste gas sampling module comprises a filter cylinder for receiving volatile organic compound waste gas from a fixed pollution source, the filter cylinder is connected with a cache gas tank through a pipeline, and the cache gas tank is connected with a gas pump communicated with the atmospheric environment through a pipeline; a first group of air valve switches for controlling whether the cache gas tank is in air intake or not are respectively arranged on an inlet end pipeline and an outlet end pipeline of the cache gas tank; the fixed source waste gas detection module comprises a carrier gas bottle, the carrier gas bottle is connected with the inlet end of the buffer gas tank through an output pipeline and used for taking out gas in the buffer gas tank, a pressure stabilizing valve and a gas flowmeter are arranged on a connecting pipeline of the carrier gas bottle and the buffer gas tank, and the output port of the buffer gas tank is connected with the input port of the gas mass spectrometer GC-MS through a pipeline and used for enabling the gas output in the buffer gas tank to enter the gas mass spectrometer GC-MS.
2. The system for monitoring the emission traceability of the volatile organic compounds of the industrial enterprises according to claim 1, further comprising a sensitive point location ambient air sampling module and a sensitive point location ambient air detection module, wherein the sensitive point location ambient air sampling module comprises another filter cylinder connected with the sensitive point location ambient air, the other filter cylinder is connected with the input end of a sampling pipe through a pipeline, the output end of the sampling pipe is connected with another air pump communicated with the atmosphere through a pipeline, a second group of air valve switches for controlling whether the sampling pipe is in air intake are respectively arranged on the pipeline at the inlet end and the outlet end of the sampling pipe, a three-way valve is arranged on a connecting pipeline between the air valve switch at the inlet of the sampling pipe and is connected with an air blowing branch through the three-way valve, the three-way valve is connected with a high-purity air bottle of the air blowing branch through a pipeline, and the air valve switch for controlling whether the high-purity air enters the sampling pipe is arranged on the connecting pipeline of the high-purity air bottle and the three-way valve; the sensitive point location environment air detection module comprises a sensitive point location air carrying bottle, an output pipeline of the sensitive point location air carrying bottle is connected with an inlet of a sampling tube after passing through a pressure stabilizing valve, a gas flowmeter and a pipeline heater, an outlet of the sampling tube is connected with an input port of a gas chromatography-mass spectrometry (GC-MS) through a pipeline, and a third group of gas valve switches for controlling whether gas in the sampling tube enters the gas chromatography-MS are also arranged at the inlet and the outlet of the sampling tube.
3. The system for monitoring the traceability of the emission of the volatile organic compounds of the industrial enterprise according to claim 1 or 2, further comprising a plurality of other fixed source exhaust gas sampling modules, wherein the pipelines connected with the output port of the air pump in each other exhaust gas sampling module are connected with each other through a three-way valve and then connected with the atmosphere through the pipelines.
4. The system for assisting industrial enterprise volatile organic compound emission traceable monitoring as claimed in claim 3, wherein the output pipeline of the fixed source exhaust gas detection module is connected with the output port of the buffer gas tank in each other fixed source exhaust gas detection module through a plurality of three-way valves.
5. The system for assisting traceable monitoring of volatile organic compound emission of industrial enterprises according to claim 4, wherein the sampling tube is filled with an adsorbent for enriching organic compounds in sensitive points.
6. The system for assisting traceability of emission of volatile organic compounds in industrial enterprises according to claim 5, wherein a fan for cooling the thermally desorbed sampling tube is arranged outside the sampling tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320399193.7U CN220207212U (en) | 2023-03-07 | 2023-03-07 | Monitoring system for assisting industrial enterprise in traceability of emission of volatile organic compounds |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320399193.7U CN220207212U (en) | 2023-03-07 | 2023-03-07 | Monitoring system for assisting industrial enterprise in traceability of emission of volatile organic compounds |
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| CN220207212U true CN220207212U (en) | 2023-12-19 |
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