Stationary pollution source volatile organic compound sampling probe

Abstract

The utility model relates to the technical field of environmental monitoring sampling, and discloses a stationary pollution source volatile organic compound sampling probe which comprises a probe main body, a shunting bin is fixedly mounted at the top of the probe main body, and the probe main body is communicated with the shunting bin through a U-shaped flow guide pipe; the top of the flow dividing bin is connected with a filtering and sampling cavity through a quick-release connector, the concentration of sample gas is adjusted through a structure arranged in the concentration matching box, particulate matters and high-molecular-weight impurities in the sample gas are filtered out through the structure in the filtering and sampling cavity, after the concentration of the sample gas is adjusted and adsorption is carried out for a period of time, an adsorption pipe into which the sample gas enters is switched, and then the sample gas is filtered out. The adsorption pipes adsorbing the sample gas are heated through the second heating device, then the gas is released, the released gas can be used for monitoring, the two adsorption pipes are alternately used, the sample gas can be enriched when the gas is released, the efficiency is improved, and the situation that online monitoring is affected due to sudden change of the concentration of the sample gas can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring sampling technology, specifically a sampling probe for volatile organic compounds from stationary pollution sources. Background Technology

[0002] Online monitoring of VOCs from stationary pollution sources is crucial for controlling air pollution. Traditional dilution-based sampling probes suffer from problems such as excessively high dilution ratios, insufficient monitoring accuracy at low-concentration outlets, and clogging under high humidity and dust conditions. Furthermore, sudden concentration changes caused by fluctuations in operating conditions often lead to monitoring response delays, affecting data real-time performance and accuracy. In existing technologies, some sampling devices utilize simple ceramic filters or single dilution techniques to address complex operating conditions; however, the inconvenience of ceramic filter replacement and low sample gas pretreatment efficiency still limit monitoring effectiveness. Utility Model Content

[0003] The purpose of this invention is to provide a sampling probe for volatile organic compounds from stationary pollution sources, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a sampling probe for volatile organic compounds from a fixed pollution source, comprising a probe body, a diversion chamber fixedly installed on the top of the probe body, the probe body and the diversion chamber being connected by a U-shaped guide tube, a filter injection chamber connected to the top of the diversion chamber via a quick-release connector, an exhaust pipe connected to the top of the filter injection chamber, a concentration matching box connected to the end of the exhaust pipe away from the filter injection chamber, a three-way pipe connected to the output end of the concentration matching box via a pipe, and an adsorption tube one and an adsorption tube two connected to the other two ends of the three-way pipe respectively, an electric valve being provided at the connection between the adsorption tube one, the adsorption tube two and the three-way pipe, and a heating device two being fitted on the outer wall of the adsorption tube one and the adsorption tube two.

[0005] Furthermore, a ceramic filter is snapped into the filtration injection chamber, and an O-ring is provided inside the filtration injection chamber, with the O-ring fitted onto the bottom of the ceramic filter.

[0006] Furthermore, the concentration matching box is equipped with a vacuum generator and a sonic orifice. The input end of the vacuum generator is connected to the exhaust pipe, the output end of the vacuum generator is connected to the input end of the sonic orifice, and the output end of the sonic orifice is connected to the end of a three-way pipe through a pipe.

[0007] Furthermore, two U-shaped guide tubes are provided, and a heating device is provided on the curved section of the U-shaped guide tube.

[0008] Furthermore, an anti-clogging tube is connected to the side of the probe body, a screw conveyor is installed inside the anti-clogging tube, and a sewage pipe is connected to the bottom of the anti-clogging tube, with the sewage pipe located near the end of the anti-clogging tube away from the probe body.

[0009] Furthermore, the probe body has an integrally formed horn-shaped channel inside, which is located between the anti-blocking tube and the U-shaped guide tube, and the horn-shaped channel is in the shape of a horn with two small openings connected at the top and bottom.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. The concentration of the sample gas is adjusted by the structure set in the concentration matching chamber. Particulate matter and high molecular weight impurities in the sample gas are filtered out by the structure in the sample inlet chamber. After the concentration of the sample gas is adjusted, it is guided by the three-way tube to adsorption tube one or adsorption tube two, and then adsorbed and enriched by adsorption tube one or adsorption tube two. After the adsorption time at one end, the adsorption tube into which the sample gas enters is switched. The adsorption tube that has adsorbed the sample gas is heated by heating device two, and then the gas is released. The released gas can be used for monitoring. The two adsorption tubes are used alternately, which can enrich the sample gas during the release of gas, improve efficiency, and avoid the impact of sudden changes in sample gas concentration on online monitoring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Structural diagram of the rear view;

[0014] Figure 3 This utility model Figure 1 A structural schematic diagram of the front sectional view;

[0015] Figure 4 This utility model Figure 1 A structural schematic diagram of the right-side sectional view.

[0016] In the diagram: 1. Probe body; 2. Flow divider; 3. U-shaped guide tube; 4. Heating device one; 5. Quick-release connector; 6. Filter injection chamber; 601. Ceramic filter; 7. Exhaust pipe; 8. Concentration matching box; 801. Vacuum generator; 802. Sonic orifice; 9. T-connector; 10. Adsorption tube one; 11. Adsorption tube two; 12. Heating device two; 13. Anti-clogging tube; 1301. Drain pipe; 1302. Screw conveyor; 14. Trumpet-shaped channel; 15. Electric valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figures 1-4 This utility model provides a technical solution: a sampling probe for volatile organic compounds from a fixed pollution source, including a probe body 1, a diversion chamber 2 fixedly installed on the top of the probe body 1, the probe body 1 and the diversion chamber 2 being connected by a U-shaped guide tube 3, the top of the diversion chamber 2 being connected to a filter injection chamber 6 via a quick-release connector 5, the top of the filter injection chamber 6 being connected to an exhaust pipe 7, the end of the exhaust pipe 7 away from the filter injection chamber 6 being connected to a concentration matching box 8, the output end of the concentration matching box 8 being connected to a three-way pipe 9 via a pipe, the other two ends of the three-way pipe 9 being connected to an adsorption tube 10 and an adsorption tube 2 11 respectively, an electric valve 15 being provided at the connection between the adsorption tube 10, the adsorption tube 2 11 and the three-way pipe 9, and a heating device 2 12 being sleeved on the outer wall of the adsorption tube 10 and the adsorption tube 2 11, which is connected by the U-shaped guide tube 3. The sample gas entering the probe body 1 is guided to the split chamber 2. The sample gas flows from the split chamber 2 through the quick-release connector 5, the filter sample inlet chamber 6, and the exhaust pipe 7 into the concentration matching box 8. The concentration of the sample gas is adjusted by the structure set in the concentration matching box 8. When the sample gas passes through the filter sample inlet chamber 6, particulate matter and large molecular weight impurities are filtered out by the structure in the filter sample inlet chamber 6. After the sample gas concentration is adjusted, it is guided by the three-way pipe 9 to the adsorption tube 10 or the adsorption tube 2 11. Then it is adsorbed and enriched by the adsorption tube 10 or the adsorption tube 2 11. After the adsorption time at one end, the adsorption tube into which the sample gas enters is switched. The adsorption tube that has adsorbed the sample gas is heated by the heating device 2 12, and then the gas is released. The released gas can be used for monitoring. The two adsorption tubes are used alternately, which can enrich the sample gas when the gas is released, thus improving efficiency.

[0019] A ceramic filter 601 is snapped into the filter injection chamber 6. An O-ring is installed inside the filter injection chamber 6 and is fitted onto the bottom of the ceramic filter 601. The O-ring is used to lock and form a seal between the ceramic filter 601 and the inner wall of the filter injection chamber 6, ensuring that the sample gas passes through the ceramic filter 601 and achieves efficient dust removal and water vapor interception.

[0020] The concentration matching box 8 is equipped with a vacuum generator 801 and a sonic orifice 802. The input end of the vacuum generator 801 is connected to the exhaust pipe 7, and the output end of the vacuum generator 801 is connected to the input end of the sonic orifice 802. The output end of the sonic orifice 802 is connected to the end of the three-way pipe 9 through a pipe. The sample gas is driven into the sonic orifice 802 by the vacuum generator 801. The sonic orifice 802 dilutes the sample gas and mixes the filtered sample gas with compressed air in proportion to complete the precise dilution.

[0021] Two U-shaped guide pipes 3 are provided, and heating device 4 is installed in the curved section of the U-shaped guide pipe 3. The two U-shaped guide pipes 3 are used to increase the channel for the sample gas to enter the diversion chamber 2. The sample gas is heated by heating device 4. After the sample gas is drawn from the high-temperature emission source, if the temperature drops suddenly, the volatile organic compounds in it will condense, resulting in component loss and affecting the accuracy of monitoring data. The gas emitted by solid pollution sources usually contains a large amount of particulate matter. When the sample gas temperature drops, the particulate matter is easy to adhere to the inner wall of the guide pipe, causing pipe blockage and affecting the continuity and accuracy of sampling. The sample gas is transmitted in a stable temperature environment, and the flow rate and flow rate will not be affected by condensation, blockage and other problems, ensuring the smoothness of the sampling process. It can quickly and efficiently transmit the sample gas to the subsequent processing module, meet the real-time requirements of online monitoring, and enable the monitoring equipment to obtain sample gas data in a timely manner, providing timely and effective information for the control of pollution sources. Therefore, heating device 4 is required for heating.

[0022] The probe body 1 has an anti-clogging tube 13 connected to its side. The anti-clogging tube 13 has a screw conveyor 1302 installed inside. The bottom of the anti-clogging tube 13 is connected to a drain pipe 1301. The drain pipe 1301 is located at the end of the anti-clogging tube 13 away from the probe body 1. When a large amount of solid enters the probe body 1, the solid is pushed into the anti-clogging tube 13. The screw conveyor 1302 is turned on to transport the solid to the drain pipe 1301 for discharge, thus preventing the solid from accumulating in the probe body 1 and causing blockage inside the probe body 1, which would prevent the sample gas from entering.

[0023] The probe body 1 has an integrally formed horn-shaped channel 14 inside. The horn-shaped channel 14 is located between the anti-blocking tube 13 and the U-shaped guide tube 3. The horn-shaped channel 14 is in the shape of a horn with two small openings connected at the top and bottom. This design allows the solid to be gradually squeezed after entering the probe body 1, making it easier for the solid to be resisted at the top and then enter the anti-blocking tube 13.

[0024] Working principle: During use, place the probe body 1 at the location to be monitored. The sample gas enters the U-shaped guide tube 3 from the probe body 1. Turn on the heating device 4 to heat the U-shaped guide tube 3, so that the sample gas is heated. The sample gas enters the split chamber 2 from the U-shaped guide tube 3, and then flows sequentially through the quick-release connector 5, the filter inlet chamber 6, and the exhaust pipe 7 into the concentration matching box 8. When the sample gas passes through the filter inlet chamber 6, the ceramic filter 601 in the filter inlet chamber 6 filters out particulate matter and large molecular weight impurities. After the sample gas enters the concentration matching box 8, the vacuum generator 801 drives the sample gas... The sample gas enters the sonic orifice 802, where it is diluted. The filtered sample gas is then mixed with compressed air in a specific ratio to achieve precise dilution. The diluted sample gas is then guided by the three-way tube 9 to the adsorption tube 10. The adsorption tube 10 adsorbs and enriches the sample gas. After a certain time at one end of the adsorption tube, the electric valve 15 on the adsorption tube 10 is closed, and the electric valve 15 on the adsorption tube 2 is opened, allowing the sample gas to enter the adsorption tube 2. At this time, the heating device 2 12 on the adsorption tube 10 is turned on to heat the adsorption tube 10, causing it to release the absorbed sample gas. This portion of the sample gas can then be monitored.

[0025] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A sampling probe for volatile organic compounds from stationary pollution sources, comprising a probe body (1), characterized in that: A flow divider (2) is fixedly installed on the top of the probe body (1). The probe body (1) and the flow divider (2) are connected by a U-shaped guide tube (3). The top of the flow divider (2) is connected to a filter injection chamber (6) via a quick-release connector (5). The top of the filter injection chamber (6) is connected to an exhaust pipe (7). The end of the exhaust pipe (7) away from the filter injection chamber (6) is connected to a concentration matching box (8). The output end of the concentration matching box (8) is connected to a three-way pipe (9) via a pipe. The other two ends of the three-way pipe (9) are respectively connected to an adsorption tube one (10) and an adsorption tube two (11). An electric valve (15) is provided at the connection between the adsorption tube one (10), the adsorption tube two (11) and the three-way pipe (9). A heating device two (12) is fitted on the outer wall of the adsorption tube one (10) and the adsorption tube two (11).

2. The sampling probe for volatile organic compounds from stationary pollution sources according to claim 1, characterized in that: A ceramic filter (601) is snapped into the filtration injection chamber (6), and an O-ring is provided inside the filtration injection chamber (6), with the O-ring fitted onto the bottom of the ceramic filter (601).

3. The sampling probe for volatile organic compounds from stationary pollution sources according to claim 1, characterized in that: The concentration matching box (8) is equipped with a vacuum generator (801) and a sonic orifice (802). The input end of the vacuum generator (801) is connected to the exhaust pipe (7), and the output end of the vacuum generator (801) is connected to the input end of the sonic orifice (802). The output end of the sonic orifice (802) is connected to the end of the tee pipe (9) through a pipe.

4. A sampling probe for volatile organic compounds from stationary pollution sources according to claim 1, characterized in that: Two U-shaped guide pipes (3) are provided, and a heating device (4) is provided on the curved section of the U-shaped guide pipe (3).

5. A sampling probe for volatile organic compounds from stationary pollution sources according to claim 1, characterized in that: The probe body (1) has an anti-blocking pipe (13) connected to its side. The anti-blocking pipe (13) has a screw conveyor (1302) inside it. The bottom of the anti-blocking pipe (13) is connected to a drain pipe (1301). The drain pipe (1301) is located at the end of the anti-blocking pipe (13) away from the probe body (1).

6. A sampling probe for volatile organic compounds from stationary pollution sources according to claim 1, characterized in that: The probe body (1) has an integrally formed horn-shaped channel (14) inside. The horn-shaped channel (14) is located between the anti-blocking tube (13) and the U-shaped guide tube (3), and the horn-shaped channel (14) is in the shape of a horn with two small openings connected at the top and bottom.

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