A combined smoke sampling device

Abstract

The utility model discloses a combined type smoke dust sampling device, including installation storehouse and sampling pipe group, and installation storehouse is equipped with connecting hole, heating tube, automatic sampling subassembly, filter membrane sampling subassembly and jet pump, heating tube is equipped with heating rod in, and the bottom surface is connected automatic sampling subassembly, automatic sampling subassembly connects filter membrane sampling subassembly, and filter membrane sampling subassembly bottom is equipped with the gas outlet, the suction port of jet pump is connected with the gas outlet of filter membrane sampling subassembly through the pipe fitting, sampling pipe group sets up in the outside of installation storehouse, and the end is connected with heating tube, the utility model provides combined type smoke dust sampling device, integrates automatic sampling subassembly and filter membrane sampling subassembly, realizes manual and automatic sampling simultaneously, can reduce error when improving efficiency, promotes the subsequent detection accuracy, and heating dehumidification, jet pump suction force guarantees the efficient stable sampling, and the compact structure is convenient to operate, ensures the reliable data, is applicable to industrial pollution source monitoring.

Description

Technical Field

[0001] This utility model relates to the technical field of dust detection equipment, specifically to a combined dust sampling device. Background Technology

[0002] With increasing global emphasis on air pollution control, accurate monitoring of particulate matter, especially PM2.5, has become a core requirement for environmental management. Since 2015, China has implemented the "Air Pollution Prevention and Control Action Plan" and the "Emission Standards for Air Pollutants from Industrial Sources," explicitly requiring industrial enterprises to install dust detection equipment and encouraging the development of high-precision dust meters. Among these methods, the membrane gravimetric method is recognized by China, the United States, and the European Union as the "gold standard" for PM2.5 monitoring due to its high accuracy. This method calculates dust concentration by precisely weighing the difference in mass of the filter membrane before and after sampling. It requires a balance with microgram-level sensitivity under constant temperature and humidity conditions to ensure data reliability.

[0003] Current dust monitoring requires a dual-validation system combining manual analysis methods (such as gravimetric analysis) and automated analysis methods (such as micro-oscillation balance). However, the traditional filter membrane gravimetric method suffers from three main problems in practical applications: human error, environmental interference, and efficiency and cost. Sampling, transportation, and weighing all rely on manual labor, which can easily introduce contamination or bias. Furthermore, the moisture content in the sample is easily affected by humidity changes, reducing data accuracy. Manual operation is also cumbersome and time-consuming, making it difficult to obtain accurate test results promptly. In addition, the long-term stability of automated equipment requires periodic calibration based on the gravimetric method, which cannot guarantee accuracy. In summary, existing dust sampling equipment is a single-sample device, cumbersome to operate, and with unstable accuracy. There is an urgent need for a device that can integrate different sampling methods to improve sampling efficiency while reducing human error. Summary of the Invention

[0004] To address the shortcomings of existing detection equipment, which requires cumbersome manual operation, suffers from large errors, and is susceptible to interference from humidity, resulting in low overall efficiency, while automation cannot guarantee accuracy, this utility model provides a combined smoke and dust sampling device that integrates sampling methods, reduces errors, and enables rapid and efficient sampling.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A combined smoke and dust sampling device includes an installation chamber and a sampling tube assembly. The installation chamber has a connection hole on its side and houses a heating tube, an automatic sampling component, a filter membrane sampling component, and a jet pump. One end of the heating tube is embedded in the connection hole and contains a heating rod. The bottom surface of the heating tube away from the connection hole is connected to the automatic sampling component. The bottom of the automatic sampling component is connected to the filter membrane sampling component, which has an air outlet at its bottom. The air inlet of the jet pump is connected to the air outlet of the filter membrane sampling component via a pipe. The sampling tube assembly is located outside the installation chamber and its end is connected to the heating tube.

[0007] How to use:

[0008] The jet pump uses existing conventional products. Before use, connect the nozzle at the sampling location of the jet pump to the factory's high-pressure gas supply line or the outlet of the extraction pump. Then connect the outlet of the jet pump to the fittings. The automatic sampling component is a sampling method included in the automatic analysis method, which can automatically collect the flow rate and concentration of flue gas. The filter membrane sampling component is a sampling method included in the manual analysis method. First, weigh the filter membrane sampling component using a balance, and then install it into the device. Taking chimney detection as an example, extend the end of the sampling fitting and the connecting fitting at the outlet of the jet pump into the chimney, turn on the heating rod, and then use the high-pressure gas supply line or extraction pump to... High-speed airflow enters the jet pump, creating a vacuum inside and generating suction. The sampling tube assembly draws the flue gas from the chimney into the sampling tube assembly, then into the heating tube for heating and dehumidification. The dehumidified flue gas then enters the automatic sampling component for sampling, obtaining flow rate data and dust concentration values. The flue gas then enters the filter membrane sampling component for re-sampling, obtaining a sample. After sampling, the flue gas is returned to the chimney through the pipe at the outlet of the jet pump, thus completing the sampling process. The sampled filter membrane sampling component is then weighed again using a balance. The sampling values ​​are then calculated by comparing the filter membrane sampling components before and after sampling, thus completing the efficient sampling operation.

[0009] Furthermore, the automatic sampling component includes a Venturi tube, a flow meter, a detection chamber, and a light-scattering laser dust collector. The detection chamber is fixedly installed in the installation compartment, with an air inlet at the top and an air outlet at the bottom connected to the filter membrane sampling component. One end of the Venturi tube is connected to a heating tube, the other end is connected to the air inlet of the detection chamber, and the side is connected to a flow meter for flow detection. The light-scattering laser dust collector is located in the detection chamber. To facilitate production and reduce costs, a commercially available product is used for the light-scattering laser dust collector. During sampling, the flue gas is dehumidified by the heating tube before entering the Venturi tube. The gas velocity is measured by the flow meter, and then the gas enters the detection chamber where the light-scattering laser dust collector detects the dust concentration in real time, achieving accurate measurement. This method requires no manual intervention and can simultaneously output flow rate and dust concentration data, improving sampling efficiency. By cooperating with the data collected by the filter membrane sampling component, the reliability of the automatic monitoring data can be ensured. At the same time, the light scattering technology has a fast response speed, and combined with the Venturi tube voltage stabilization design, it effectively reduces the interference of airflow fluctuations on the measurement, making the automatic sampling results more stable.

[0010] Furthermore, the light scattering laser dust collector is equipped with an electronic display screen, which is embedded in the detection chamber for easy viewing of detection data. The electronic display screen of the light scattering laser dust collector can display dust concentration data in the detection chamber in real time, facilitating on-site viewing and recording by operators. Visualization of the detection process reduces data reading errors, enhances the human-machine interface of the equipment, and improves sampling efficiency and user experience.

[0011] Furthermore, the filter membrane sampling assembly is a disc filter with a filter membrane installed in the middle. The air inlet is connected to the air outlet of the detection chamber, and the air outlet is connected to the air intake of the jet pump through a pipe. The filter membrane can be disassembled, removed, or replaced. The disc filter design of the filter membrane sampling assembly facilitates quick disassembly and replacement of the filter membrane, simplifies the manual sampling process, and ensures sufficient contact between the filter membrane and the airflow, improving particulate matter collection efficiency. Its modular structure facilitates weighing operations before and after sampling and avoids manual installation errors. Combined with automatic sampling data, it achieves dual calibration, which can improve detection accuracy and operational convenience.

[0012] Furthermore, the sampling tube assembly includes a connecting tube and a sampling tube; one end of the connecting tube mates with the heating tube, and the other end connects to the sampling tube, with a flange sleeved around the outer periphery of the connecting tube; the connecting hole of the mounting chamber has a threaded connecting rod corresponding to the flange, and a nut is threaded onto the threaded connecting rod. The improved sampling tube assembly adopts a mating structure of flange and threaded connecting rod, which allows for a quick and sealed connection between the connecting tube and the heating tube by tightening the nut. This ensures the stability and airtightness of the sampling gas path, simplifies the disassembly and assembly process, and avoids the problems of loosening or leakage in traditional hose connections. It is particularly suitable for high-temperature and high-humidity flue environments, improving sampling stability and ease of operation.

[0013] Furthermore, the sampling tube is an L-shaped bend. The L-shaped bend facilitates flexible insertion into the flue or chimney, adapting to different installation angles and space constraints, improving the convenience and applicability of the sampling operation. It also effectively reduces airflow disturbance, allowing flue gas to enter the sampling system smoothly, improving sampling uniformity and accuracy, and reducing interference from the external environment on the sampling process.

[0014] Furthermore, a sealing ring is provided between the connecting pipe and the heating pipe. The added sealing ring effectively prevents smoke leakage or external air mixing during sampling, ensuring the airflow path is sealed, thereby improving the accuracy and stability of the sampling data, while reducing measurement errors caused by air leakage and enhancing the reliability of the device.

[0015] Furthermore, a retaining sleeve is fixedly provided near the end of the heating rod. The retaining sleeve is embedded in the end of the heating tube, allowing the heating rod to extend into the interior of the heating tube. The heating rod is fixed inside the heating tube by the retaining sleeve, ensuring stable operation of the heating element and facilitating maintenance and replacement. At the same time, the connection structure between the heating tube and the mounting chamber enhances sealing, preventing flue gas leakage, making heating and dehumidification more uniform and efficient, eliminating humidity interference with sampling, and effectively improving the accuracy of sampling data.

[0016] Furthermore, a pressure relief valve is also provided at the top of the heating tube. During the heating process, when the internal pressure of the tube exceeds the safe range, the pressure relief valve automatically releases excess pressure to prevent equipment damage or sampling abnormalities caused by overpressure, ensuring the safety and stability of the device operation, avoiding the impact of pressure fluctuations on sampling accuracy, and extending the service life of the device.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. This utility model provides a combined flue gas sampling device that integrates an automatic sampling component and a filter membrane sampling component, enabling simultaneous sampling using both manual and automatic analysis methods to reduce human error; heating and dehumidifying the flue gas via a heating tube reduces humidity interference and improves detection accuracy; a jet pump, in conjunction with high-pressure gas supply, creates vacuum suction, making the sampling process efficient and stable; the overall structure is compact and easy to operate, implementing a dual verification system to ensure data reliability, and is suitable for the precise monitoring needs of industrial pollution sources.

[0019] 2. The automatic sampling component of this utility model adopts a venturi tube, a flow meter and a light scattering laser dust meter to realize real-time measurement of flow rate and concentration. It has fast response and accurate data, and the embedded electronic display screen is convenient for on-site viewing, enhancing the ease of operation. The filter membrane sampling component adopts a detachable disc filter, which is easy to replace and weigh, reduces human error, and improves sampling efficiency and equipment reuse rate.

[0020] 3. This utility model sampling device achieves rapid and sealed installation of the sampling tube assembly through the cooperation of flange pipe and threaded connecting rod, improving airtightness and stability, and adapting to complex flue environments; the L-shaped sampling bend facilitates flexible insertion, reduces airflow disturbance, and improves sampling uniformity and accuracy; a sealing ring is set at the connection to prevent flue gas leakage and ensure data reliability; the heating rod adopts a clamp fixing structure, which enhances heating stability and facilitates replacement, while a pressure relief valve is set at the top of the heating tube to ensure safe operation of the device at high temperatures, which can effectively extend the service life of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a partial cross-sectional view of the structure of this utility model.

[0023] Figure 3 This is a cross-sectional structural diagram of the filter membrane sampling component of this utility model.

[0024] Figure 4 This is a cross-sectional structural schematic diagram of the jet pump of this utility model.

[0025] Attached image labels:

[0026] Installation compartment—1, threaded connecting rod—11, nut—12, sampling tube assembly—2, connecting tube—21, sampling tube—22, flange tube—23, heating tube—3, heating rod—31, ferrule—32, pressure relief valve—33, automatic sampling assembly—4, venturi tube—41, flow meter—42, detection chamber—43, light scattering laser dust meter—44, electronic display screen—45, filter membrane sampling assembly—5, jet pump—6, sealing ring—7. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Example 1: A combined smoke and dust sampling device includes an installation chamber 1 and a sampling tube assembly 2. The installation chamber 1 has a connection hole on its side and is equipped with a heating tube 3, an automatic sampling component 4, a filter membrane sampling component 5, and a jet pump 6. One end of the heating tube 3 is embedded in the connection hole and has a heating rod 31 inside. The bottom surface of the side away from the connection hole is connected to the automatic sampling component 4. The bottom of the automatic sampling component 4 is connected to the filter membrane sampling component 5, and the bottom of the filter membrane sampling component 5 has an air outlet. The air inlet of the jet pump 6 is connected to the air outlet of the filter membrane sampling component 5 through a pipe. The sampling tube assembly 2 is located on the outside of the installation chamber 1 and its end is connected to the heating tube 3.

[0029] How to use:

[0030] The jet pump 6 uses existing conventional products. Before use, connect the nozzle at the sampling position of the jet pump 6 to the factory's high-pressure gas supply line or the outlet of the extraction pump. Then connect the outlet of the jet pump 6 to pipe 21. The automatic sampling component 4 is a sampling method included in the automatic analysis method, which can automatically collect the flow rate and concentration of flue gas. The filter membrane sampling component 5 is a sampling method included in the manual analysis method. First, weigh the filter membrane sampling component 5 using a balance, and then install it into the device. Taking chimney sampling as an example, insert the sampling pipe 22 and the end of the connecting pipe to the outlet of the jet pump 6 into the chimney. Turn on the heating rod 31, and then use the high-pressure gas supply line or extraction pump. The pump supplies air, and the high-speed airflow enters the jet pump 6, creating a vacuum inside, which in turn generates suction. The sampling tube group 2 draws the flue gas from the chimney into the sampling tube group 2, and then into the heating tube 3 for heating and dehumidification. The dehumidified flue gas enters the automatic sampling component 4 for sampling, obtaining flow data and dust concentration values. The flue gas enters the filter membrane sampling component 5 for re-sampling, obtaining a sample. After sampling, the flue gas is sent back to the chimney through the pipe fitting at the outlet of the jet pump 6, thus completing the sampling. The sampled filter membrane sampling component 5 is weighed again using a balance. Then, the sampling values ​​are obtained by calculating the values ​​of the filter membrane sampling component 5 before and after sampling, thus completing the efficient sampling operation.

[0031] Example 2: The difference from Example 1 is that the automatic sampling component 4 includes a Venturi tube 41, a flow meter 42, a detection chamber 43, and a light scattering laser dust collector 44. The detection chamber 43 is fixedly installed in the installation compartment 1, with an air inlet at the top and an air outlet at the bottom connected to the filter membrane sampling component 5. One end of the Venturi tube 41 is connected to the heating tube 3, and the other end is connected to the air inlet of the detection chamber 43. The flow meter 42 for flow detection is connected to the side. The light scattering laser dust collector 44 is set in the detection chamber 43. To facilitate production and reduce costs, the light scattering laser dust collector 44 uses a commercially available product. During sampling, the flue gas is dehumidified by a heating tube and then enters the Venturi tube 41. The gas flow rate is measured by a flow meter 42, and then the gas enters the detection chamber 43 where the light scattering laser dust collector 44 detects the dust concentration in real time, achieving accurate measurement. This method requires no manual intervention and can simultaneously output flow rate and dust concentration data, improving sampling efficiency. By cooperating with the data collection of the filter membrane sampling component 5, the reliability of the automatic monitoring data can be ensured. At the same time, the light scattering technology has a fast response speed, and combined with the voltage stabilization design of the Venturi tube 41, it effectively reduces the interference of airflow fluctuations on the measurement, making the automatic sampling results more stable.

[0032] The sampling tube assembly 2 includes a connecting tube 21 and a sampling tube 22. One end of the connecting tube 21 is fitted with the heating tube 3, and the other end is connected to the sampling tube 22. A flange tube 23 is also fitted around the outer periphery of the connecting tube 21. A threaded connecting rod 11 corresponding to the flange tube 23 is provided around the connecting hole of the mounting chamber 1, and a nut 12 is threaded onto the threaded connecting rod 11. The improved sampling tube assembly 2 adopts a mating structure of flange tube 23 and threaded connecting rod 11. By tightening the nut 12, a quick and sealed connection between the connecting tube 21 and the heating tube 3 can be achieved. This ensures the stability and airtightness of the sampling gas path, simplifies the disassembly and assembly process, and avoids the problems of loosening or leakage in traditional hose connections. It is especially suitable for high-temperature and high-humidity flue environments, improving sampling stability and ease of operation.

[0033] Example 3: The difference from Example 2 is that the light scattering laser dust collector 44 is equipped with an electronic display screen 45, which is embedded in the detection chamber 43 for easy viewing of detection data. The electronic display screen 45 of the light scattering laser dust collector 44 can display the dust concentration data in the detection chamber 43 in real time, which is convenient for operators to view and record on-site. The visualization of the detection process reduces data reading errors, enhances the human-machine interaction performance of the equipment, and improves sampling efficiency and user experience.

[0034] The sampling tube 22 is an L-shaped bend. The L-shaped bend of the sampling tube 22 facilitates flexible insertion into the flue or chimney, adapts to different installation angles and space constraints, improves the convenience and applicability of the sampling operation, effectively reduces airflow disturbance, allows flue gas to enter the sampling system smoothly, improves sampling uniformity and accuracy, and also reduces the interference of the external environment on the sampling process.

[0035] A sealing ring 7 is also provided between the connecting pipe 21 and the heating pipe 3. The added sealing ring 7 effectively prevents the leakage of flue gas or the mixing of external air during the sampling process, ensuring the airtightness of the airflow path, thereby improving the accuracy and stability of the sampling data, while reducing measurement errors caused by air leakage and enhancing the reliability of the device.

[0036] Example 4: The difference from Example 1 is that the filter membrane sampling assembly 5 is a disc filter, with a filter membrane installed in the middle of the disc filter. The air inlet is connected to the air outlet of the detection chamber 43, and the air outlet is connected to the air intake of the jet pump 6 through a pipe. The filter membrane can be disassembled and replaced. The disc filter design of the filter membrane sampling assembly 5 facilitates quick disassembly and replacement of the filter membrane, simplifying the manual sampling process. It also ensures sufficient contact between the filter membrane and the airflow, improving particulate matter collection efficiency. Its modular structure facilitates weighing operations before and after sampling and avoids manual installation errors. Combined with automatic sampling data, it achieves dual calibration, improving detection accuracy and operational convenience.

[0037] A retainer 32 is fixedly provided near the end of the heating rod 31. The retainer 32 is embedded in the end of the heating tube 3, allowing the heating rod 31 to extend into the interior of the heating tube 3. The heating rod 31 is fixed inside the heating tube 3 by the retainer 32, ensuring stable operation of the heating element and facilitating maintenance and replacement. At the same time, the connection structure between the heating tube and the installation chamber 1 enhances the sealing performance, preventing flue gas leakage, making heating and dehumidification more uniform and efficient, eliminating the interference of humidity on sampling, and effectively improving the accuracy of sampling data.

[0038] The top of the heating tube is also equipped with a pressure relief valve 33. During the heating process, when the internal pressure of the tube exceeds the safe range, the pressure relief valve 33 automatically releases excess pressure to prevent equipment damage or sampling abnormalities caused by overpressure, thus ensuring the safety and stability of the device operation, avoiding the impact of pressure fluctuations on sampling accuracy, and extending the service life of the device.

[0039] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A combined smoke and dust sampling device, characterized in that: The assembly includes an installation chamber (1) and a sampling tube assembly (2). The installation chamber (1) has a connection hole on its side. The installation chamber (1) contains a heating tube (3), an automatic sampling assembly (4), a filter membrane sampling assembly (5), and a jet pump (6). One end of the heating tube (3) is embedded in the connection hole and has a heating rod (31) inside. The bottom surface of the side away from the connection hole is connected to the automatic sampling assembly (4). The bottom of the automatic sampling assembly (4) is connected to the filter membrane sampling assembly (5), and the bottom of the filter membrane sampling assembly (5) has an air outlet. The air inlet of the jet pump (6) is connected to the air outlet of the filter membrane sampling assembly (5) through a pipe. The sampling tube assembly (2) is located on the outside of the installation chamber (1) and its end is connected to the heating tube (3).

2. The combined smoke and dust sampling device as described in claim 1, characterized in that: The automatic sampling assembly (4) includes a venturi tube (41), a flow meter (42), a detection chamber (43), and a light scattering laser dust meter (44). The detection chamber (43) is fixedly installed in the installation compartment (1), with an air inlet at the top and an air outlet at the bottom that connects to the filter membrane sampling assembly (5). One end of the venturi tube (41) is connected to the heating tube (3), and the other end is connected to the air inlet of the detection chamber (43). The side is connected to the flow meter (42) used for flow detection. The light scattering laser dust meter (44) is set inside the detection chamber (43).

3. The combined smoke and dust sampling device as described in claim 2, characterized in that: The filter membrane sampling component (5) is a disc filter with a filter membrane installed in the middle. The air inlet is connected to the air outlet of the detection chamber (43), and the air outlet is connected to the air inlet of the jet pump (6) through a pipe.

4. The combined smoke and dust sampling device as described in claim 1, characterized in that: The sampling tube assembly (2) includes a connecting tube (21) and a sampling tube (22); one end of the connecting tube (21) is connected to the heating tube (3), and the other end is connected to the sampling tube (22), and a flange tube (23) is also fitted around the outer periphery of the connecting tube (21); a threaded connecting rod (11) corresponding to the flange tube (23) is provided around the connecting hole of the installation chamber (1), and a nut (12) is threaded onto the threaded connecting rod (11).

5. The combined smoke and dust sampling device as described in claim 4, characterized in that: The sampling tube (22) is an L-shaped bend.

6. The combined smoke and dust sampling device as described in claim 4, characterized in that: A sealing ring (7) is also provided between the connecting pipe (21) and the heating pipe (3).

7. The combined smoke and dust sampling device as described in claim 1, characterized in that: The heating rod (31) is fixedly provided with a sleeve (32) near its end. The sleeve (32) is embedded in the end of the heating tube (3) and extends the heating rod (31) into the interior of the heating tube (3).

8. The combined smoke and dust sampling device as described in claim 7, characterized in that: The top of the heating element is also equipped with a pressure relief valve (33).

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