CN112649569A - Chemical industry park air multipoint sampling monitoring and tracing system and method - Google Patents
Chemical industry park air multipoint sampling monitoring and tracing system and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0047—Organic compounds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display by measuring the rate of variation of the concentration
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Abstract
The invention relates to a system and a method for multi-point sampling monitoring and tracing of air in a chemical industry park, which uninterruptedly collects air at a large number of point positions in the chemical industry park to a central station room through an air pump and a pipeline; furthermore, various high-precision detection devices are used for detecting various pollutants of each pipeline in a centralized and time-sharing manner; further, an hourly pollution cloud map of each pollutant is generated through the generated large amount of detection data; and finally, combining meteorological parameters, forming the hourly pollution cloud pictures into pollution migration animations to be played, and tracing the atmospheric pollution according to the pollution animations. The invention is applied to air monitoring of chemical industry park, can well realize accurate and precise tracing of atmosphere monitoring data, and well saves labor and equipment cost.
Description
Technical Field
The invention belongs to the technical field of environmental protection, relates to a system and a method for automatically detecting environmental air and tracing atmospheric pollution in a chemical industry park, and particularly relates to a system and a method for multipoint sampling monitoring and tracing of air in the chemical industry park.
Background
In the history of the operation and development of a plurality of chemical industry parks, the air quality reduction and the serious influence on the health of sensitive people around the air quality are aeipathia existing for many years, and the main reason is that the air pollution cannot be effectively monitored, so that the source is searched and managed. The traditional air monitoring and tracing of the chemical industry park are generally realized by adopting methods such as manual sampling detection, sniffing, small electrochemical sensor stations, super air monitoring stations, cruise detection vehicles and the like.
However, the small monitoring stations for manual detection, sniffing and electrochemical sensing have the defects of incomplete measurement factors, few point positions, low frequency, poor precision and the like, so that the problems of pollution positioning and tracing cannot be solved all the time; although the environment monitoring super station has high monitoring precision and a plurality of monitoring projects, the source tracing application is also greatly limited due to large investment, less distribution points and high use cost; the cruise vehicle detection also has the defects of few vehicle-mounted equipment, poor data real-time performance, high detection cost, small data quantity, insufficient arrival in a park and the like.
If the source cannot be traced and the pollution source cannot be traced in time, a window breaking effect can be generated, even if the normally-managed enterprises gradually lose the management power, and the enterprises fall into the vicious circle with the aggravated pollution. For many years, a great amount of manpower, material resources and technical means are put into some chemical industry parks, and the supervision and treatment of atmospheric pollution still cannot achieve satisfactory effects.
Disclosure of Invention
The invention aims to provide a system and a method for multi-point sampling monitoring and tracing of air in a chemical industrial park, so that accurate and precise tracing of atmospheric monitoring data is realized, and labor and equipment cost expenses can be saved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a be used for chemical industry garden air multiple spot sampling monitoring and traceability system which characterized in that: the system comprises a data processing display system and a multi-point sampling monitoring system, wherein the multi-point sampling monitoring system is a surface source gridding network consisting of a plurality of monitoring sampling points and at least one central gas station arranged at the centers of the monitoring sampling points, and the central gas station is connected with the data processing display system through an RS-232 or RS-485 digital quantity communication module.
Furthermore, the multipoint sampling monitoring system comprises a plurality of sampling pipelines connected in parallel and a gas distribution control system at the tail end, and gas samples of the sampling pipelines are conveyed to the central gas station in a time-sharing manner one by one through the gas distribution control system; the sampling pipeline comprises an air inlet pipeline and an exhaust pipeline, wherein the air inlet pipeline is sequentially provided with an air inlet, a sampling pump and a one-way valve along the air flow direction, the air inlet pipelines are connected in parallel and then are converged into the air distribution control system, and the exhaust pipeline is connected with the one-way valve and then is converged into an exhaust port; the gas distribution control system is converged into a sample injection pump by each gas inlet pipeline, and the sample injection pump is connected with a plurality of detection devices.
Furthermore, when each sampling point performs time-sharing sampling, the sampling pump on each corresponding sampling pipeline continuously and uninterruptedly works so as to ensure that a real-time gas sample exists in the corresponding air inlet pipeline; opening stop valves on each sampling point and the corresponding independent air inlet pipeline thereof, starting the sample injection pump to work, and conveying the gas sample of the sampling point to a plurality of detection devices in the central gas station for gas sample detection and analysis; meanwhile, sampling pumps corresponding to other sampling points still work continuously, gas samples are conveyed to a gas sample centralized discharge port through corresponding exhaust pipelines with one-way valves, and stop valves corresponding to the sampling points are all closed, so that gas blowby of pipelines of the sampling points is avoided.
Furthermore, the layout of the sampling points covers all boundaries of the area to be monitored and is arranged to surround enterprises in the area to be monitored, and more than four sampling points are arranged on the periphery of each enterprise; the distance between adjacent sampling points is 400 meters to 500 meters.
Furthermore, the sampling pipeline adopts an ultraviolet-resistant transparent polytetrafluoroethylene tube, and is erected by depending on the existing bridge, culvert, enterprise enclosure and the like in the park.
Further, three sections of pretreatment layers are sequentially arranged on the air inlet from outside to inside; the first-section pretreatment layer is a sampling port end treatment layer and comprises a rainproof inverted cover for preventing rainwater from entering a sampling pipeline and a stainless steel dustproof net for filtering large particles with the diameter larger than 0.3mm, the stainless steel dustproof net is circumferentially fixed along the outer wall of the end part of the sampling port, and the rainproof inverted cover is arranged on the outer side of the stainless steel dustproof net; the second stage of pretreatment layer is a filter treatment layer and comprises a DFU filter which is arranged in the air inlet and is used for filtering particles with the particle size of more than 10 microns; the third pretreatment layer is a water-blocking treatment layer and comprises a water-blocking device for filtering mist water drops, and the inlet end of the water-blocking device is connected with the outlet end of the DFU filter.
Furthermore, the sampling pump and the sample injection pump are high-performance oil-free and water-free vacuum air extraction pumps so as to guarantee long-time reliable work.
Further, the detection device is composed of an inorganic matter detection device and an organic matter detection device, the inorganic matter detection device includes but is not limited to a PM2.5 detection device, a hydrogen sulfide detection device and a Fourier infrared detection device, and the organic matter detection device includes but is not limited to a non-methane total hydrocarbon detection device and a magnetic mass spectrum detection device.
Further, the detection device is composed of an inorganic matter detection device and an organic matter detection device, the inorganic matter detection device includes but is not limited to a PM2.5 detection device, a hydrogen sulfide detection device and a Fourier infrared detection device, and the organic matter detection device includes but is not limited to a non-methane total hydrocarbon detection device and a magnetic mass spectrum detection device.
A method for a chemical industrial park air multi-point sampling monitoring and tracing system comprises the following steps,
step 2, enabling the gas samples of the sampling points to enter various high-precision detection equipment in batches through an air inlet control system, and detecting various pollutants in the gas samples of the sampling points in a time-sharing manner;
The invention has the beneficial effects that:
1. the invention relates to the field of automatic air monitoring of chemical industrial parks, and creatively provides a method for multi-point sampling and centralized detection to further trace the atmospheric pollution, which can use limited funds for the construction of a central station, and can detect a large number of field points in a time-sharing manner through a central line station so as to solve the problems of ' detection ', ' use ', traceability ' and the like of the atmospheric pollution.
2. The multipoint sampling pipeline layout method can uninterruptedly collect air at a large number of point positions of a chemical industry park to a central station room by the comprehensive application of the air pump, the valve and the related pipeline, and can gradually collect and detect various pollutants of each sampling point pipeline in a time-sharing manner by applying a self-research sampling and gas sample distribution control system and combining the corresponding pipeline and detection equipment; therefore, most of known pollutants can be covered, the detection precision meets the management requirement, and the requirement of 'measurement and measurement' is realized. Meanwhile, the automatic monitoring network of the park has reasonable one-time investment and low operation cost so as to realize the requirement of 'being used up'.
3. The invention uses the self-research data processing display system to generate the hourly pollution cloud pictures of each pollutant from the detection data; and combining meteorological parameters, forming the hourly pollution cloud pictures into pollution migration animations for playing, and tracing the atmospheric pollution according to the pollution animations. Therefore, once the ambient air quality is abnormal, the environment air quality can be found and traced immediately, and the key of the tracing is that the sampling measuring point is enough, the detection frequency is secondary enough, and the detection precision is enough.
Drawings
Fig. 1 is a schematic view of sampling points and pipeline layout of a multi-point air sampling system for a chemical industrial park according to the present invention.
Fig. 2 is a schematic view of the operation principle of the pipeline device of the air multipoint sampling system of a certain chemical industry park.
Fig. 3 is a diagram illustrating the latest hour data of a multi-point air sampling system for a chemical industrial park according to the present invention.
FIG. 4 is a dynamic display diagram of a pollution cloud of the air multi-point sampling system of a chemical industrial park according to the present invention.
Fig. 5 is a flow chart of a monitoring and tracing method of a multipoint air sampling system for a chemical industrial park according to the present invention.
FIG. 6 is a schematic view of the air inlet structure of a multi-point air sampling system for a chemical industrial park according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The system for monitoring and tracing the air multipoint sampling in the chemical industry park provided by the embodiment comprises a sampling point 2, an erection pipeline 3 (comprising an air inlet pipeline 5 and an exhaust pipeline 8) of the sampling point, a central gas station 4 and a control system for connecting the equipment facilities in series as shown in fig. 1 and fig. 2. The sampling points 2 should be arranged according to the following principle: firstly, all boundaries of the park are covered; secondly, more than 4 sampling points are distributed around the enterprise; thirdly, the distribution of sampling points is as uniform as possible, and the distance between adjacent sampling points is about 400 meters generally, and the maximum distance is not more than 500 meters; fourthly, the sampling pipeline generally adopts an anti-ultraviolet transparent polytetrafluoroethylene tube; the air inlet 6 of the sampling point 2 is provided with three pretreatment layers; the first-section pretreatment layer is a sampling port end and comprises a rainproof inverted cover (used for preventing rainwater from entering a sampling pipeline) and a stainless steel dust screen (used for filtering large particles with the diameter more than 0.3 mm); the second stage of pretreatment layer is in the DFU filter and is used for filtering particles with the particle size of more than 10 microns; the third pretreatment layer is a water stopper and is used for filtering the mist water drops.
The method for monitoring and tracing the source based on the air multi-point sampling for the chemical industry park comprises the following steps,
Step 2, enabling the gas samples of the sampling points to enter various high-precision detection equipment in batches through an air inlet control system, and detecting various pollutants in the gas samples of the sampling points in a time-sharing manner; the detection device comprises inorganic matter detection devices and organic matter detection devices, wherein the inorganic matter detection devices comprise but are not limited to PM2.5 detection devices, hydrogen sulfide detection devices and Fourier infrared detection devices, and the organic matter detection devices comprise but are not limited to non-methane total hydrocarbon detection devices and magnetic mass spectrum detection devices.
Various contaminants are shown in Table 1
| Serial number | Characteristic factor of contamination | Serial number | Characteristic factor of |
| 1 | |
12 | Dichloroethane |
| 2 | |
13 | |
| 3 | |
14 | Benzene and its |
| 4 | CO | 15 | Toluene |
| 5 | O3 | 16 | Xylene |
| 6 | Hydrogen chloride | 17 | Acetone (II) |
| 7 | Ammonia | 18 | |
| 8 | Hydrogen sulfide | 19 | |
| 9 | |
20 | |
| 10 | Non-methane total hydrocarbons | 21 | |
| 11 | Trichloromethane | 22 | Ethylbenzene production |
TABLE 1
as shown in fig. 3, the data processing display system completes data response according to the required data type (latest real-time data and historical data); the response process of the latest real-time data comprises the following steps: the system returns the data stored in the Redis cache, which is all the data of the latest time of all the current monitoring points (but they are not the data of the same time point, because each sampling point is detected in a time-sharing manner, and the data transmission is also sequential, for example, the latest data of the A1 monitoring point is 19:09, and the latest data of the B2 monitoring point may be 18: 56); responding to the historical data, and returning the data stored in the Mysql database by the system, wherein daily average data (generally average data of 24 pieces) and hourly average data (if more than 1 piece exists in the hour) can be transmitted according to requirements;
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a be used for chemical industry garden air multiple spot sampling monitoring and traceability system which characterized in that: the system comprises a data processing display system and a multi-point sampling monitoring system, wherein the multi-point sampling monitoring system is a surface source gridding network consisting of a plurality of monitoring sampling points and at least one central gas station arranged at the centers of the monitoring sampling points, and the central gas station is connected with the data processing display system through an RS-232 or RS-485 digital quantity communication module.
2. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 1, characterized in that: the multipoint sampling monitoring system comprises a plurality of sampling pipelines connected in parallel and a gas distribution control system at the tail end, and gas samples of the sampling pipelines are conveyed to the central gas station in a time-sharing manner successively through the gas distribution control system;
the sampling pipeline comprises an air inlet pipeline and an exhaust pipeline, wherein the air inlet pipeline is sequentially provided with an air inlet, a sampling pump and a one-way valve along the air flow direction, the air inlet pipelines are connected in parallel and then are converged into the air distribution control system, and the exhaust pipeline is connected with the one-way valve and then is converged into an exhaust port;
the gas distribution control system is converged into a sample injection pump by each gas inlet pipeline, and the sample injection pump is connected with a plurality of detection devices.
3. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: when each sampling point carries out time-sharing sampling, the sampling pump on each corresponding sampling pipeline continuously and uninterruptedly works so as to ensure that the corresponding air inlet pipeline has real-time gas samples; opening stop valves on each sampling point and the corresponding independent air inlet pipeline thereof, starting the sample injection pump to work, and conveying the gas sample of the sampling point to a plurality of detection devices in the central gas station for gas sample detection and analysis; meanwhile, sampling pumps corresponding to other sampling points still work continuously, gas samples are conveyed to a gas sample centralized discharge port through corresponding exhaust pipelines with one-way valves, and stop valves corresponding to the sampling points are all closed, so that gas blowby of pipelines of the sampling points is avoided.
4. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: the layout of the sampling points covers all boundaries of the area to be monitored and is arranged to surround enterprises in the area to be monitored, and more than four upper sampling points are arranged on the periphery of each enterprise; the distance between adjacent sampling points is 400 meters to 500 meters.
5. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: the sampling pipeline adopts an ultraviolet-resistant transparent polytetrafluoroethylene tube, and is erected by depending on the existing bridge, culvert, enterprise enclosure and the like in a park.
6. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: the air inlet is sequentially provided with three sections of pretreatment layers from outside to inside; the first-section pretreatment layer is a sampling port end treatment layer and comprises a rainproof inverted cover for preventing rainwater from entering a sampling pipeline and a stainless steel dustproof net for filtering large particles with the diameter larger than 0.3mm, the stainless steel dustproof net is circumferentially fixed along the outer wall of the end part of the sampling port, and the rainproof inverted cover is arranged on the outer side of the stainless steel dustproof net; the second stage of pretreatment layer is a filter treatment layer and comprises a DFU filter which is arranged in the air inlet and is used for filtering particles with the particle size of more than 10 microns; the third pretreatment layer is a water-blocking treatment layer and comprises a water-blocking device for filtering mist water drops, and the inlet end of the water-blocking device is connected with the outlet end of the DFU filter.
7. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: the sampling pump and the sample injection pump are high-performance oil-free and water-free vacuum air extraction pumps so as to ensure long-time reliable work.
8. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 2, characterized in that: the detection device comprises inorganic matter detection devices and organic matter detection devices, wherein the inorganic matter detection devices comprise but are not limited to PM2.5 detection devices, hydrogen sulfide detection devices and Fourier infrared detection devices, and the organic matter detection devices comprise but are not limited to non-methane total hydrocarbon detection devices and magnetic mass spectrum detection devices.
9. The system for chemical industrial park air multipoint sampling monitoring and traceability according to claim 1, characterized in that: the data processing and displaying system comprises a data acquisition instrument, a wireless data transmission module, a networking display platform and the like
The data acquisition instrument is used for acquiring, processing and transmitting monitored data;
the wireless data transmission module is used for reading and transmitting wireless data, and the data transmission is based on mobile, telecommunication or Unicom operators to realize wireless data remote transmission;
the networked display platform refers to a networked computer or other networked platforms, and the monitoring display interface can be accessed by inputting a specific website corresponding to a specific database server.
10. A method for a chemical industrial park air multipoint sampling monitoring and traceability system as claimed in claims 1-9, characterized in that: comprises the following steps of (a) carrying out,
step 1, gridding and dividing an area to be monitored, distributing a multi-point sampling monitoring system in batches, uninterruptedly collecting gas samples of each sampling point in the area to be monitored, and conveying the gas samples to a central gas station;
step 2, enabling the gas samples of the sampling points to enter various high-precision detection equipment in batches through an air inlet control system, and detecting various pollutants in the gas samples of the sampling points in a time-sharing manner;
step 3, generating an hourly pollution cloud chart of each pollutant through a large amount of generated detection data; one cycle time of detecting each sampling point gas sample is calculated according to hours, so the obtained data is called hour data;
step 4, combining meteorological parameters to form an hourly pollution cloud picture into a pollution migration animation for playing, and tracing the atmospheric pollution according to the pollution animation; the meteorological parameters include, but are not limited to, wind direction, temperature and humidity and other data.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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