A system for multipath long distance sampling for analysis of organic and inorganic components

Abstract

This invention discloses a system for multi-channel long-distance sampling for organic and inorganic component analysis, comprising a sampling system, a directional valve, and an analysis system. The sampling system and the analysis system are connected via at least one directional valve. The sampling system includes multiple sampling channels, each equipped with a filter and a flow meter for collecting gas and delivering it to the directional valve. The directional valve has a cavity and a hollow rotating arm. The hollow rotating arm of the directional valve connects one of the sampling channels to the analysis system by rotation, allowing one sampled gas to be delivered to the analysis system for organic and inorganic component analysis. The analysis system can be integrated for simultaneous organic and inorganic component analysis, or it can be configured as separate organic analysis systems for organic component analysis and inorganic analysis systems for inorganic component analysis. This invention offers advantages such as wide detection area, low cost, and diverse detection methods.

Description

Technical Field

[0001] This invention relates to the field of gas sampling and analysis technology, specifically to a system for analyzing organic and inorganic components through multi-channel long-distance sampling. Background Technology

[0002] Traditional monitoring systems suffer from long sampling times, few sampling points, and limited detection methods, failing to meet real-world management requirements.

[0003] Chinese invention patent CN104090077A, published on October 8, 2014, discloses a multi-channel circulating sampling gas analysis system and control method with channel self-checking function. The system includes at least a sample gas channel, a sampling channel, an analysis channel, an emission channel, a purge channel, and a controller. The sampling channel and the emission channel share the same sample gas channels. The controller controls two-position three-way solenoid valves to switch between sampling and emission, enabling cyclic sampling and analysis of multiple sample gases. The analysis channel and the emission channel are equipped with flow switches. The controller's channel self-checking module judges the combined control of the solenoid valves and pumps and the high and low states of the flow switches to determine whether each channel is blocked or leaking, thus achieving automatic inspection of the sample gas flow channels. This patent designs a channel self-test function for checking blockages and leaks in the system pipeline. However, multiple manual shut-off valves and solenoid valves are arranged on the sample gas channel for opening and closing the sample gas channel. As the number of sample gas channels increases, the product cost and the probability of solenoid valve failure increase significantly. On the other hand, the sample gas channel in this patent is connected to both the emission channel and the sampling channel. The separate setting of the two channels also increases the product cost to some extent.

[0004] There is an urgent need for an online monitoring system that can cover a wide area, be low in cost, and be able to detect and trace the sources of VOCs and odorous gases in the industrial park in a timely manner. This system would provide technical support and decision support for government departments to carry out refined management of environmental pollution in industrial parks, achieve refined management of volatile organic compounds, and solve the problems of safety management and odor nuisance in the park. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a system for analyzing organic and inorganic components through multi-channel long-distance sampling, which satisfies the requirements of multi-channel long-distance pre-sampling and enables the analysis of organic and inorganic components in the sampled gas.

[0006] The technical solution provided by this invention is as follows: A system for analyzing organic and inorganic components through multi-channel long-distance sampling includes a sampling system, a directional valve, and an analysis system, wherein the sampling system and the analysis system are connected by at least one directional valve.

[0007] The sampling system includes multiple sampling channels, each including a sampling inlet and a sampling outlet, as well as a filter and a flow meter arranged in the sampling channel. The sampling inlet is connected to the sampling outlet in sequence via the filter and the flow meter.

[0008] The directional valve has multiple inlet ports, each connected to the sampling outlet of the sampling system. The directional valve also includes a hollow rotating arm, a first outlet, a second outlet, a cavity, and a controller. The first end of the hollow rotating arm is connected to the first outlet. The hollow rotating arm is rotatably arranged in the center of the cavity and communicatively connected to the controller. The controller controls the rotation of the hollow rotating arm so that the second end of the hollow rotating arm can be switched to connect to the multiple inlet ports. The multiple inlet ports and the second outlet are arranged on the cavity and connected through the cavity. The second outlet is connected to a discharge channel. The input end of the analysis system is connected to the first sample outlet, and the output end of the analysis system is connected to the discharge channel.

[0009] Preferably, the analysis system includes a flow limiting valve, an organic analysis interface, a pressure sensor, a second proportional valve, a sampling pump, an inorganic analysis interface, an organic component detection device, and an inorganic component detection device. The flow limiting valve, organic analysis interface, pressure sensor, second proportional valve, sampling pump, and inorganic analysis interface are connected in series. The organic component detection device is connected to the organic analysis interface, the inorganic component detection device is connected to the inorganic analysis interface, the flow limiting valve is connected to the first sample outlet, and the inorganic analysis interface is connected to the discharge channel.

[0010] Preferably, the system includes a first directional valve and a second directional valve, wherein the first outlet of the first directional valve and the first outlet of the second directional valve are both connected to a flow restrictor valve.

[0011] Preferably, the system includes a first directional valve and a second directional valve, and the analytical system is configured as an organic analytical system for analyzing organic components and an inorganic analytical system for analyzing inorganic components. The organic analysis system includes an organic flow-limiting valve, an organic three-way valve, an organic analysis interface, a pressure sensor, and a second proportional valve, all connected in sequence by ventilation pipes. The inorganic analysis system includes an inorganic flow-limiting valve, an inorganic three-way valve, a sampling pump, and an inorganic analysis interface, all connected in sequence by ventilation pipes. The output end of the organic three-way valve is connected to the organic analysis interface, the output end of the inorganic three-way valve is connected to the sampling pump, the two input ends of the organic three-way valve are respectively connected to the first sample outlet of the first directional valve and the first sample outlet of the second directional valve, the two input ends of the inorganic three-way valve are respectively connected to the first sample outlet of the first directional valve and the first sample outlet of the second directional valve, and the second proportional valve and the inorganic analysis interface are both connected to the discharge channel.

[0012] Preferably, a cleaning system is included, the cleaning system comprising a first proportional valve and a flow restrictor, the first proportional valve being connected to the analysis system and also connected to a zero gas pipeline via the flow restrictor.

[0013] Preferably, a flow tank and a flow sensor are arranged between the analysis system and the discharge channel, and the analysis system is connected to the discharge channel after passing through the flow tank and the flow sensor in sequence.

[0014] Preferably, the filter includes a dust filter and a water filter, the dust filter being connected to the sampling inlet, and the dust filter also being connected to the flow meter via a water filter.

[0015] Preferably, the directional valve includes a heating device for supplying heat to the directional valve, the heating device being arranged at the lower end of the cavity and fixedly connected to the cavity.

[0016] Preferably, both the organic component detection device and the inorganic component detection device are connected to a computer, which is used to analyze the values ​​of pollutants detected by the organic component detection device and the inorganic component detection device.

[0017] As a preferred embodiment, a method for detecting excessive levels of pollutants in retained samples uses the aforementioned system for multi-channel long-distance sampling and analysis of organic and inorganic components to detect pollutants in the sampled gas, obtaining the types of pollutants and the corresponding detection pollution levels, including the following steps: Step 1: Establish a pollutant database, including the types of pollutants and pollution thresholds; Step 2: Obtain the types of pollutants and their corresponding pollution levels; Step 3: Detect the sampling points, compare the detected contamination level of the pollutants with the contamination level threshold in the database, and mark the sampling points. If the detected contamination level of the sampling point is less than or equal to the contamination level threshold, mark the sampling point as a healthy sampling point. If the detected contamination level of the sampling point is greater than the contamination level threshold, mark the sampling point as a contaminated sampling point, and remark the healthy sampling points near the sampling point as pending sampling points. Step 4: Repeat Step 3 to complete the detection of all sampling points, and detect the sampling points to be determined after a time interval T / 2; Step 5: Execute steps 3 and 4 at time intervals T. The beneficial effects of this invention include: 1. The directional valve enables real-time long-distance sampling at multiple sampling points, and the analysis system simultaneously detects and analyzes organic and inorganic components in the sampled gas. The integrated analysis system ensures instrument performance while minimizing costs, or it can be configured separately to distinguish between organic components with shorter detection and analysis cycles and inorganic components with longer detection and analysis cycles, enabling independent process detection and analysis.

[0018] 2. A heating device is installed at the lower end of the directional valve for high-temperature heat tracing, with a maximum temperature of 120℃, which can prevent the adsorption of sample gas and the condensation of condensate.

[0019] 3. Real-time detection of the sampled gas is achieved by pre-sampling each sampling channel. When the hollow rotating arm of the directional valve is connected to one of the sampling channels, the other sampling channels are simultaneously pre-sampled. The collected gas is placed in the cavity and excess gas can be discharged through the second sampling outlet. The pre-sampling of the sampled gas ensures that when the hollow rotating arm switches sampling channels, the switched sampling channel can immediately provide sampling gas, greatly reducing the waiting time for long-distance gas sampling.

[0020] 4. The analysis system is connected to a cleaning system, which performs zero-gas purging before sampling and analysis in each sampling channel. When the zero-gas solenoid valve is opened, the ventilation pipes and switching pipes of the directional valve of the analysis system are purged to avoid mutual interference between sample gases in each sampling channel. Preferably, zero-gas purging is performed at the same time as channel switching to shorten the entire analysis cycle time.

[0021] 5. A flow tank and a flow sensor are installed at the back end of the analysis system to monitor the flow rate of the discharged sampled gas. The airtightness of the system is judged by comparing the discharge flow rate of the sampled gas with the sampling flow rate. When the discharge flow rate of the sampled gas is greater than the sampling flow rate, it indicates that the system has poor airtightness. Attached Figure Description

[0022] Figure 1 This is a system gas path diagram for a multi-channel long-distance sampling system for organic and inorganic component analysis in this invention, using a single directional valve. Figure 2 This invention provides a system gas path diagram for a multi-channel long-distance sampling system for analyzing organic and inorganic components, using two directional valves. Figure 3 This invention provides a system gas path diagram for a multi-channel long-distance sampling system for analyzing organic and inorganic components, which uses two directional valves to alternately connect the organic component analysis system and the inorganic component analysis system.

[0023] The components include: dust filter 1, water filter 2, flow meter 3, cavity 4, sample inlet 5, hollow rotating arm 6, first sample outlet 7, second sample outlet 8, heating device 9, third proportional valve 10, vacuum pump 11, flow limiting valve 12, organic analysis interface 13, pressure sensor 14, second proportional valve 15, sampling pump 16, inorganic analysis interface 17, organic component detection device 18, inorganic component detection device 19, first proportional valve 20, flow restrictor 21, flow tank 22, flow sensor 23, and organic three-way valve 24. 1. Inorganic three-way valve 24-2, cavity 4-1 of the first directional valve, inlet 5-1 of the first directional valve, rotating arm 6-1 of the first directional valve, first outlet 7-1 of the first directional valve, second outlet 8-1 of the first directional valve, heating device 9-1 of the first directional valve, cavity 4-2 of the second directional valve, inlet 5-2 of the second directional valve, rotating arm 6-2 of the second directional valve, first outlet 7-2 of the second directional valve, second outlet 8-2 of the second directional valve, heating device 9-2 of the second directional valve. Detailed Implementation

[0024] If the above objectives have not been achieved, the present invention will be further described below with reference to the accompanying drawings.

[0025] In each embodiment of the present invention, the sampling system and the directional valve have the same connection method, and the only difference is the number of directional valves.

[0026] The present invention discloses a system for analyzing organic and inorganic components through multi-channel long-distance sampling, based on a 32-channel (expandable) directional valve. The 32 sampling channels are arranged on-site and the sampling gas is absorbed by the sampling inlet. After the sampling gas passes through a 5µm dust filter 1 to remove most of the particulate matter, it enters the 1000m (maximum support 1500m) long 8*6 sampling channel at the rear end at a flow rate greater than 5.6L / min. Then, after passing through a water removal filter 2 and a rotor flow meter 3, it enters the cavity of the directional valve with 32 sampling channels from the inlet 5. The controller controls the hollow rotating arm 6 to rotate around the first end of the hollow rotating arm so that the second end of the hollow rotating arm is connected to the inlet of the directional valve. The sampling gas enters from the second end of the hollow rotating arm connected to the inlet 5, passes through the hollow channel of the hollow rotating arm 6, flows out from the first end of the hollow rotating arm, and enters the first outlet 7. The first outlet 7 is connected to the analysis system. The sampling gas flowing out of the sampling port that is not connected to the hollow rotating arm 6 remains in the cavity and flows out from the second sampling port 8 in a timely manner. After passing through the third proportional valve 10 and the vacuum pump 11, it is discharged from the discharge channel to keep the sampling gas in the cavity within a suitable pressure range.

[0027] Example 1: like Figure 1As shown, a system for multi-channel long-distance sampling for organic and inorganic component analysis includes a sampling system, a directional valve, and an analysis system. The sampling system and the analysis system are connected via at least one directional valve. The sampling system includes multiple sampling channels, each including a sampling inlet and a sampling outlet, as well as filters and flow meters arranged in the sampling channels. The sampling inlet is connected to the sampling outlet in sequence through a dust filter 1, a water filter 2, and a rotor flow meter 3.

[0028] The directional valve has multiple inlet ports 5, each connected to the sampling outlet of the sampling system. The directional valve also includes a hollow rotating arm 6, a first outlet port 7, a second outlet port 8, a cavity 4, and a controller. The first end of the hollow rotating arm 6 is connected to the first outlet port 7. The hollow rotating arm 6 is rotatably arranged in the middle of the cavity 4 and communicatively connected to the controller. The controller controls the rotation of the hollow rotating arm 6 so that the second end of the hollow rotating arm can be switched to connect to the multiple inlet ports 5. The multiple inlet ports 5 and the second outlet port 8 are arranged on the cavity 4 and connected through the cavity 4. The second outlet port 8 is sequentially connected to a third proportional valve 10, a vacuum pump 11, and then to a discharge channel. The analysis system includes a flow limiting valve 12, an organic analysis interface 13, a pressure sensor 14, a second proportional valve 15, a sampling pump 16, an inorganic analysis interface 17, an organic component detection device 18, and an inorganic component detection device 19. The flow limiting valve 12, organic analysis interface 13, pressure sensor 14, second proportional valve 15, sampling pump 16, and inorganic analysis interface 17 are connected in series. The organic component detection device 18 is connected to the organic analysis interface 13, the inorganic component detection device 19 is connected to the inorganic analysis interface 17, the flow limiting valve 12 is connected to the first sample outlet 7, and the inorganic analysis interface 17 is connected to the discharge channel after the flow tank 22 and the flow sensor 23.

[0029] The system for analyzing organic and inorganic components by multi-channel long-distance sampling includes a cleaning system, which includes a first proportional valve 20 and a flow restrictor 21. The first proportional valve 20 is connected to the analysis system and is also connected to a zero gas pipeline via the flow restrictor 21.

[0030] The directional valve includes a heating device 9 for supplying heat to the directional valve. The heating device 9 is arranged at the lower end of the cavity 4 and is fixedly connected to the cavity 4.

[0031] Both the organic component detection device 18 and the inorganic component detection device 19 are connected to a computer, which is used to analyze the values ​​of pollutants detected by the organic component detection device 18 and the inorganic component detection device 19.

[0032] Sampling gas is drawn from one sampling channel via a directional valve. After entering the analysis system, the sampling gas sequentially passes through a flow-limiting valve 12, an organic analysis interface 13, a pressure sensor 14, a second proportional valve 15, a sampling pump 16, and an inorganic analysis interface 17. The organic analysis interface 13 is connected to an organic component detection device 18, which employs time-of-flight mass spectrometry. The organic component detection device 18 extracts the sampling gas flowing through the organic analysis interface 13 and detects common volatile organic compounds (VOCs) in the sampling gas, recording the types and levels of pollutants. After passing through the organic analysis interface 13, the sampling gas then passes through the pressure sensor 14 and the second proportional valve 15. The pressure sensor 14 and the second proportional valve 15 are interlocked to maintain the pressure in the ventilation pipeline within a set threshold range. The system rotates according to the pressure value displayed by the pressure sensor 14. The second proportional valve 15 adjusts the pressure of the ventilation pipeline to the threshold range. The sampling gas flowing out of the second proportional valve 15 passes through the sampling pump 16 and then through the inorganic analysis interface 17. The inorganic analysis interface 17 can be connected to one or more inorganic component detection devices 19. The inorganic component detection devices use inorganic meters to detect pollutants containing inorganic components in the sampling gas, record the type of pollutant and the relevant pollution degree. Then the sampling gas passes through the flow tank 22 and the flow sensor 23. The flow sensor 23 is used to monitor the flow rate of the discharged sampling gas. The discharge flow rate of the sampling gas is compared with the sampling flow rate detected by the flow meter in the sampling pipeline for the detection of system airtightness. The discharge flow rate of the sampling gas after passing through the flow limiting valve 12 should be less than the collection flow rate. If the discharge flow rate is greater than the collection flow rate, it indicates that the airtightness of the analysis system is poor and the analysis system needs to be checked.

[0033] The system for analyzing organic and inorganic components through multi-channel long-distance sampling detects pollutants in sampled gases, obtaining the types of pollutants and their corresponding levels of contamination. A method for detecting excessive levels of the pollutants and their corresponding levels of contamination, including the following steps: Step 1: Establish a pollutant database, including the types of pollutants and pollution thresholds; Step 2: Obtain the types of pollutants and their corresponding pollution levels; Step 3: Detect the sampling points, compare the detected contamination level of the pollutants with the contamination level threshold in the database, and mark the sampling points. If the detected contamination level of the sampling point is less than or equal to the contamination level threshold, mark the sampling point as a healthy sampling point. If the detected contamination level of the sampling point is greater than the contamination level threshold, mark the sampling point as a contaminated sampling point, and remark the healthy sampling points near the sampling point as pending sampling points. Step 4: Repeat Step 3 to complete the detection of all sampling points, and detect the sampling points to be determined after a time interval T / 2; Step 5: Execute steps 3 and 4 at time interval T.

[0034] By marking contaminated sampling points to facilitate subsequent cleaning, and marking healthy sampling points in the vicinity of the contaminated sampling points as pending sampling points, and after a round of inspection of all sampling points, the pending sampling points are tested again to ensure that the contaminated sampling points have not spread and contaminated the surrounding sampling points. By conducting self-cleaning and diffusion detection of contaminated sampling points, the degree of contamination in the detection area can be effectively reduced.

[0035] Zero gas purging is required before each round of sampling analysis or after detecting a contaminated sampling point to effectively prevent mutual interference between various contaminants in the channel. Zero gas enters the analysis system through the zero gas pipeline, passing sequentially through the flow restrictor 21 and the first proportional valve 20, and purges the organic component detection device 18, the inorganic component detection device 19 at the back end, the directional valve at the front end, and the ventilation pipeline.

[0036] Example 2: A system for analyzing organic and inorganic components using multi-channel long-distance sampling includes two (or more) directional valves connected in parallel before a flow-limiting valve 12. When one directional valve is performing round-robin sampling, the hollow rotating arm 6 of the other directional valve stops on one sampling channel and blocks that sampling channel with a plug, ensuring that only one sampling channel among all the parallel directional valves receives the sampled gas, which is then delivered to the analysis system via the flow-limiting valve 12. Figure 2 As shown, this embodiment uses a 32-way directional valve for expansion. When there are 60 sampling points on site (more than 32), two 32-way directional valves are arranged in parallel to meet the sampling requirements. The two directional valves include a first directional valve and a second directional valve. The first sampling port 7-1 of the first directional valve and the first sampling port 7-2 of the second directional valve are both connected to the flow limiting valve 12. The same as in Embodiment 1 will not be repeated.

[0037] Example 3: like Figure 3 As shown, a system for multi-channel long-distance sampling to analyze organic and inorganic components differs from Embodiment 1 in that it includes a first directional valve and a second directional valve, and the analysis system is divided into an organic analysis system for analyzing organic components and an inorganic analysis system for analyzing inorganic components. The organic analysis system includes a flow-limiting valve 12, an organic three-way valve 24-1, an organic analysis interface 13, a pressure sensor 14, and a second proportional valve 15, all connected in sequence by ventilation pipes. The inorganic analysis system includes a flow-limiting valve 12, an inorganic three-way valve 24-2, a sampling pump 16, and an inorganic analysis interface 17, all connected in sequence by ventilation pipes. The output end of the organic three-way valve 24-1 is connected to the organic analysis interface 13, the output end of the inorganic three-way valve 24-2 is connected to the sampling pump 16, the two input ends of the organic three-way valve 24-1 are respectively connected to the first sample outlet 7-1 of the first directional valve and the first sample outlet 7-2 of the second directional valve, the two input ends of the inorganic three-way valve 24-2 are respectively connected to the first sample outlet 7-1 of the first directional valve and the first sample outlet 7-2 of the second directional valve, and the second proportional valve 15 and the inorganic analysis interface 17 are both connected to the discharge channel.

[0038] The sampling gas from both the first and second directional valves can be delivered to both the inorganic and organic component analysis systems. When multiple sampling points are involved on-site, two directional valves are arranged to meet the sampling requirements. Simultaneously, the sampling gas collected by both directional valves can be used for inorganic and organic component detection. Since the organic component detection device 18 for VOCs detection uses a time-of-flight mass spectrometer capable of outputting data in seconds, its analysis cycle is relatively short. The inorganic instruments in the inorganic component detection device 19 use AQMS series instruments with longer analysis cycles. To improve the analysis efficiency at the sampling points, the inorganic and organic analysis systems can cross-sample from both the first and second directional valves. When the organic analysis system samples the gas... While the organic component VOCs detection system is performing the organic component VOCs detection, the inorganic analysis system is performing the inorganic component detection on the sampled gas. The sampled gas to be detected can come from one sampling channel of the first directional valve, or from the sampling channels of the first and second directional valves respectively. Preferably, when the inorganic component detection device is performing inorganic component detection and analysis, after the first sampling and during the detection and analysis process, the inorganic component detection device will not extract the sampled gas again until the first sampled gas has been detected and analyzed, and then the second sampled gas will be sampled. After the organic component detection device completes the organic component detection and analysis of the sampled gas collected in one sampling channel, it will start the organic component detection and analysis of the sampled gas collected in the next sampling channel.

Claims

1. A system for multichannel long distance sampling for analysis of organic and inorganic components, characterized by, It includes a sampling system, a directional valve, and an analysis system, wherein the sampling system and the analysis system are connected via at least one directional valve. The sampling system includes multiple sampling channels, each sampling channel having a sampling inlet and a sampling outlet, as well as a filter and a flow meter arranged in the sampling channel. The sampling inlet is connected to the sampling outlet in sequence via the filter and the flow meter. The directional valve has multiple inlet ports, each connected to the sampling outlet of the sampling system. The directional valve also includes a hollow rotating arm, a first outlet, a second outlet, a cavity, and a controller. The first end of the hollow rotating arm is connected to the first outlet. The hollow rotating arm is rotatably arranged in the center of the cavity and communicatively connected to the controller. The controller controls the rotation of the hollow rotating arm so that the second end of the hollow rotating arm can be switched to connect to the multiple inlet ports. The multiple inlet ports and the second outlet are arranged on the cavity and connected through the cavity. The second outlet is connected to a discharge channel. The input end of the analysis system is connected to the first sample outlet, and the output end of the analysis system is connected to the discharge channel; The analysis system includes a flow limiting valve, an organic analysis interface, a pressure sensor, a second proportional valve, a sampling pump, an inorganic analysis interface, an organic component detection device, and an inorganic component detection device. The flow limiting valve, organic analysis interface, pressure sensor, second proportional valve, sampling pump, and inorganic analysis interface are connected in series in sequence. The organic component detection device is connected to the organic analysis interface, the inorganic component detection device is connected to the inorganic analysis interface, the flow limiting valve is connected to the first sample outlet, and the inorganic analysis interface is connected to the discharge channel. The organic component detection device extracts the sampling gas flowing through the organic analysis interface; the pressure sensor and the second proportional valve are interlocked, and the second proportional valve is adjusted according to the pressure value detected by the pressure sensor so that the pressure in the ventilation pipeline is maintained within the set threshold range.

2. The system for multi-channel long-distance sampling for organic and inorganic component analysis as described in claim 1, characterized in that, It includes a first directional valve and a second directional valve, wherein the first outlet of the first directional valve and the first outlet of the second directional valve are both connected to a flow restrictor valve.

3. A system for the analysis of organic and inorganic components by multipath long distance sampling as claimed in claim 1, wherein, It includes a first directional valve and a second directional valve, and the analysis system is divided into an organic analysis system for analyzing organic components and an inorganic analysis system for analyzing inorganic components. The organic analysis system includes an organic flow-limiting valve, an organic three-way valve, an organic analysis interface, a pressure sensor, and a second proportional valve, all connected in sequence by ventilation pipes. The inorganic analysis system includes an inorganic flow-limiting valve, an inorganic three-way valve, a sampling pump, and an inorganic analysis interface, all connected in sequence by ventilation pipes. The output end of the organic three-way valve is connected to the organic analysis interface, the output end of the inorganic three-way valve is connected to the sampling pump, the two input ends of the organic three-way valve are respectively connected to the first sample outlet of the first directional valve and the first sample outlet of the second directional valve, the two input ends of the inorganic three-way valve are respectively connected to the first sample outlet of the first directional valve and the first sample outlet of the second directional valve, and the second proportional valve and the inorganic analysis interface are both connected to the discharge channel.

4. A system for analyzing organic and inorganic components using multi-channel long-distance sampling as described in any one of claims 1 to 3, characterized in that, The system includes a cleaning system, which comprises a first proportional valve and a flow restrictor. The first proportional valve is connected to the analysis system and is also connected to a zero-gas pipeline via the flow restrictor.

5. A system for analyzing organic and inorganic components using multi-channel long-distance sampling as described in any one of claims 1 to 3, characterized in that, A flow tank and a flow sensor are also arranged between the analysis system and the discharge channel. The analysis system is connected to the discharge channel after passing through the flow tank and the flow sensor in sequence.

6. The system for multi-channel long-distance sampling for organic and inorganic component analysis as described in claim 1, characterized in that, The filter includes a dust filter and a water filter. The dust filter is connected to the sampling inlet, and the dust filter is also connected to the flow meter via a water filter.

7. The system for multi-channel long-distance sampling for organic and inorganic component analysis as described in claim 1, characterized in that, The directional valve includes a heating device for supplying heat to the directional valve, the heating device being arranged at the lower end of the cavity and fixedly connected to the cavity.

8. The system for multi-channel long-distance sampling for organic and inorganic component analysis as described in claim 1, characterized in that, Both the organic component detection device and the inorganic component detection device are connected to a computer, which is used to analyze the values ​​of pollutants detected by the organic component detection device and the inorganic component detection device.

9. A method for detecting excessive levels in retained samples, comprising using a multi-channel long-distance sampling system for analyzing organic and inorganic components as described in any one of claims 1 to 8 to detect pollutants in the sampled gas, obtaining the types of pollutants and the associated detection pollution levels, characterized in that, Including the following steps: Step 1: Establish a pollutant database, including the types of pollutants and pollution thresholds; Step 2: Obtain the types of pollutants and their corresponding pollution levels; Step 3: Detect the sampling points, compare the detected contamination level of the pollutants with the contamination level threshold in the database, and mark the sampling points. If the detected contamination level of the sampling point is less than or equal to the contamination level threshold, mark the sampling point as a healthy sampling point. If the detected contamination level of the sampling point is greater than the contamination level threshold, mark the sampling point as a contaminated sampling point, and remark the healthy sampling points near the sampling point as pending sampling points. Step 4: Repeat Step 3 to complete the detection of all sampling points, and detect the sampling points to be determined after a time interval T / 2; Step 5: Execute steps 3 and 4 at time interval T.

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