A new flue gas sampling device

Abstract

The utility model discloses a novel flue gas collection device, including probe rod connecting piece, heating pipe, clamp, blowback connecting piece and heating rod, one end of probe rod connecting piece is connected with the sampling pipe, and the other end periphery is equipped with flange A, one end of heating pipe is equipped with steam -water separating pipe, and the other end passes through clamp and connects blowback connecting piece, wherein heating pipe still is equipped with flange B, flange B and flange A are connected through the bolt setting, make steam -water separating pipe set up in the middle of probe rod connecting piece, heating rod passes through blowback connecting piece, heating pipe, steam -water separating pipe in proper order, and the end extends to the probe rod connecting piece. The utility model integrates heating pipe, steam -water separating pipe and heating rod, realizes synchronous rapid dehumidification when high humidity flue gas collection, avoids the complicated operation of traditional high temperature gasification pretreatment, and promotes the detection precision, and flange and clamp can dismantle design and maintain conveniently, and heating rod penetrates the whole and realizes integrated heating, and the structure is compact, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection testing equipment technology, specifically to a novel flue gas sampling device. Background Technology

[0002] Environmental pollution from industrial boilers, power plant boilers, and industrial kilns is becoming increasingly prominent, with dust pollution being particularly severe. In recent years, dust control has primarily relied on baghouse dust collectors or electrostatic precipitators combined with wet desulfurization or wet electrostatic precipitators. This results in a complex situation where dust emissions from pollution sources exhibit low concentrations and high humidity, making online monitoring challenging. Existing mainstream online monitoring products require high-temperature gasification pretreatment of the extracted high-humidity dust to eliminate the influence of high humidity on measurements. However, this pretreatment involves collecting the dust first and then performing high-temperature gasification, which is time-consuming and complex. Furthermore, high-temperature gasification pretreatment may lead to secondary volatilization or adsorption loss of low-concentration dust, affecting the determination of the true emission concentration. Therefore, based on these issues, there is an urgent need to improve existing sampling devices. Summary of the Invention

[0003] To address the shortcomings of existing high-humidity dust collection devices, which require pretreatment, are time-consuming, complex to operate, and can affect the measurement of actual emission concentrations, this invention provides a novel flue gas collection device that integrates high-humidity dust collection and dehumidification, reduces overall time consumption, is easy to operate, and minimizes the impact on the measurement of actual emission concentrations.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A novel flue gas collection device includes a probe connector, a heating tube, a clamp, a backflush connector, and a heating rod. One end of the probe connector is connected to a sampling tube, and the other end has a flange A on its outer periphery. One end of the heating tube has a steam-water separation tube, and the other end is connected to the backflush connector via a clamp. The end of the heating tube near the steam-water separation tube also has a flange B. Flange B is connected to flange A by bolts, positioning the steam-water separation tube in the middle of the probe connector, with the end face of the probe connector coinciding with the end face of the heating tube. The heating rod passes sequentially through the backflush connector, the heating tube, and the steam-water separation tube, extending its end into the probe connector.

[0006] Furthermore, the backflush connector includes a connecting pipe, one end of which is connected to the heating pipe via a clamp, and a Venturi tube is connected to the side of the connecting pipe. A retaining sleeve is connected to the heating rod to mate with the connecting pipe, and the retaining sleeve is detachably connected to the connecting pipe. The connecting pipe is quickly connected to the heating pipe via the clamp, and the heating rod is limited by the retaining sleeve to ensure stable heating. The Venturi tube efficiently guides the dehumidified flue gas into the gas chamber of the detection equipment, utilizing its negative pressure effect to improve airflow efficiency and prevent flue gas stagnation. The backflush connector is connected to the heating pipe via the clamp for easy disassembly and maintenance, the retaining sleeve ensures stable installation of the heating rod, and the Venturi tube structure facilitates smooth entry of flue gas into the gas chamber of the detection equipment, improving sampling efficiency and enhancing measurement accuracy and reliability.

[0007] Furthermore, a pair of front end caps are symmetrically provided at the end of the connecting pipe. The front end caps are openings in the caps to serve as quick interfaces for external pipelines; wherein: the front end caps provided in this application are a 1 / 8 front end cap and a φ8mm compression sleeve front end cap. The two front end caps are symmetrically provided to facilitate the adaptation of the air circuit interface. The 1 / 8 front end cap can be connected to the backflush air circuit, followed by structural purging to reduce contamination. The lower φ8mm compression sleeve front end cap is used to seal and fix the venturi tube.

[0008] Furthermore, the steam-water separator tube is internally equipped with several staggered metal water guide plates, and its bottom surface has strip-shaped water outlet holes. These staggered metal water guide plates effectively increase the contact area between the flue gas and the tube wall, promoting moisture condensation and flow along the guide plates to the bottom, where it is discharged through the strip-shaped water outlet holes. This not only improves dehumidification efficiency and reduces moisture interference with subsequent detection, but also ensures the accuracy of dust concentration measurement in the flue gas. Simultaneously, the metal material possesses excellent corrosion resistance and thermal conductivity, extending its service life.

[0009] Furthermore, flange B is welded and fixed to the outer circumference of the heating pipe; the heating pipe adopts a double-layer metal tube. The welding and fixing of flange B to the outer circumference of the heating pipe enhances the stability and sealing of the connection structure, ensuring no leakage during flue gas transmission. The double-layer metal tube design of the heating pipe not only improves the high-temperature resistance and corrosion resistance of the device but also effectively reduces heat loss and improves heating efficiency.

[0010] Furthermore, sealing rings are provided on the connecting surfaces at both ends of the heating tube. The two ends of the heating tube are connected to the probe connector and the backflush connector respectively through the sealing rings, which can ensure overall sealing, effectively prevent leakage of high-humidity flue gas and interference from external air, improve heating and dehumidification efficiency, avoid measurement errors caused by air leakage, extend the service life of the equipment, and make the sampling data more stable and reliable.

[0011] Furthermore, the sampling tube is L-shaped. The L-shaped structure of the sampling tube allows for flexible adjustment of the insertion angle and direction according to on-site conditions, improving the applicability and ease of installation of the device. It also helps avoid areas of airflow disturbance within the flue, achieving more uniform and stable flue gas collection and reducing sampling errors.

[0012] Furthermore, it also includes a jet pump, which is welded to the side of the heating tube. The jet pump uses a commercially available product. Before use, the nozzle of the jet pump is connected to the factory's high-pressure gas supply line or the outlet of the suction pump, and an existing pipe is connected to the outlet of the jet pump. The end of the pipe is then placed at the sampling position, and the air inlet of the jet pump and the outlet of the backflush connector are both connected to the air chamber of the existing detection equipment. During use, the jet pump is turned on, and the jet pump uses the jet principle to create negative pressure in the air chamber, which in turn creates negative pressure inside the backflush connector, driving the flue gas to flow into the air chamber for detection. After the flue gas detection is completed, the jet pump returns the flue gas to the sampling position. This design is compact, easy to install, and can effectively improve flue gas delivery efficiency.

[0013] How to use:

[0014] The air outlet of the backflush connector is connected to the air chamber of the existing detection equipment. The sampling tube of the device is extended to the flue gas collection position. When in use, the heating rod is turned on for heating, and the sampling tube collects flue gas. The collected high-humidity flue gas is initially heated in the probe connector. After heating, it enters the steam-water separation tube, where steam-water separation is performed simultaneously with heating. The flue gas after steam-water separation enters the heating tube for reheating, which can evaporate the water vapor more fully. Afterward, the flue gas enters the air chamber of the existing detection equipment through the backflush connector for detection.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] 1. This utility model achieves rapid dehumidification directly during the high-humidity flue gas collection process by integrating a heating tube, a steam-water separation tube, and a heating rod. This avoids the problems of long time consumption and complicated operation of traditional high-temperature gasification pretreatment. The collected samples can be directly used for testing, and the accuracy of subsequent testing is also improved. The detachable flange connection and clamp design facilitates the installation and maintenance of the device. The heating rod runs through the entire structure to achieve integrated heating. The structure is compact, easy to operate, and can be directly connected to existing testing equipment. It is suitable for monitoring high-humidity, low-concentration dust emissions and combines high efficiency, accuracy, and practicality.

[0017] 2. This utility model improves the ease of connection and sealing of the device through quick-connect clamps, venturi tube flow guidance, ferrule limiting, and double front end cap design, enhancing heating stability and gas delivery efficiency. It also adapts to various interface specifications, simplifying the operation process and improving sampling accuracy, detection reliability, and applicability to multiple scenarios. The staggered metal water guide plates inside the steam-water separation tube effectively increase the contact area between the flue gas and the tube wall, promoting the condensation of moisture in the flue gas and its flow along the water guide plates to the bottom, where it is discharged through the strip-shaped water outlet, thus improving dehumidification and reducing moisture interference with subsequent detection.

[0018] 3. In this utility model, flange B is welded to the outer circumference of the heating tube, improving the connection stability and sealing performance and preventing flue gas leakage; the heating tube adopts a double-layer metal tube structure, enhancing its high temperature resistance and corrosion resistance, and improving heating efficiency; the sealing at both ends of the heating tube improves the sealing performance, preventing leakage of high-humidity flue gas and interference from external air, and improving dehumidification efficiency and measurement accuracy; the sampling tube has an L-shaped design for easy sampling; the jet pump is welded to the side of the heating tube, and the air inlet is connected to the gas chamber of the detection equipment, using negative pressure to enhance sampling power, improve flue gas delivery efficiency, and has a compact structure, is easy to install, and improves system stability and response speed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram from the main viewpoint of this utility model.

[0021] Figure 3 This is a top-view cross-sectional structural diagram of the steam-water separator pipe of this utility model.

[0022] Attached image labels:

[0023] Probe connector—1, heating tube—2, clamp—3, backflush connector—4, connecting tube—41, venturi tube—42, front end cap—43, heating rod—5, ferrule—51, sampling tube—6, flange A—71, flange B—72, steam-water separator—8, metal water guide plate—81, strip-shaped water outlet—82, sealing ring—9, jet pump—10. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Example 1: A novel flue gas collection device includes a probe connector 1, a heating tube 2, a clamp 3, a backflush connector 4, and a heating rod 5. One end of the probe connector 1 is connected to a sampling tube 6, and the other end is provided with a flange A71. One end of the heating tube 2 is provided with a steam-water separation tube 8, and the other end is connected to the backflush connector 4 through the clamp 3. The end of the heating tube 2 near the steam-water separation tube 8 is also provided with a flange B72. The flange B72 and the flange A71 are connected by bolts, so that the steam-water separation tube 8 is located in the middle of the probe connector 1, and the end face of the probe connector 1 coincides with the end face of the heating tube 2. The heating rod 5 passes through the backflush connector 4, the heating tube 2, and the steam-water separation tube 8 in sequence, and its end extends into the probe connector 1.

[0026] The outlet of the backflush connector 4 is connected to the gas chamber of the existing detection equipment. The sampling tube 6 of the device is extended to the flue gas collection position. When in use, the heating rod 5 is turned on for heating. The sampling tube 6 collects flue gas. The collected high-humidity flue gas is initially heated in the probe connector 1. After heating, it enters the steam-water separation tube 8. Steam-water separation is carried out at the same time as heating. The flue gas after steam-water separation enters the heating tube 2 for reheating, which can evaporate the water vapor more fully. Then the flue gas enters the gas chamber of the existing detection equipment through the backflush connector 4 for detection.

[0027] Example 2: The difference from Example 1 is that the backflush connector 4 includes a connecting pipe 41, one end of which is connected to the heating pipe 2 via a clamp 3, and a Venturi tube 42 is connected to the side of the connecting pipe 41. A retaining sleeve 51, which mates with the connecting pipe 41, is connected to the heating rod 5. The retaining sleeve 51 is detachably connected to the connecting pipe 41. The connecting pipe 41 is quickly connected to the heating pipe 2 via the clamp 3, and the heating rod 5 is limited by the retaining sleeve 51 to ensure stable heating. The Venturi tube 42 efficiently guides the dehumidified flue gas into the gas chamber of the detection equipment, utilizing its negative pressure effect to improve airflow efficiency and prevent flue gas stagnation. The backflush connector 4 is connected to the heating pipe 2 via the clamp 3, facilitating disassembly and maintenance. The retaining sleeve ensures stable installation of the heating rod 5. The structure of the Venturi tube 42 facilitates smooth entry of flue gas into the gas chamber of the detection equipment, improving sampling efficiency and enhancing measurement accuracy and reliability.

[0028] The steam-water separator 8 has several staggered metal water guide plates 81 inside, and a strip-shaped water outlet 82 on its bottom surface. The staggered metal water guide plates 81 inside the steam-water separator 8 effectively increase the contact area between the flue gas and the pipe wall, promote water condensation and flow along the water guide plates to the bottom, and discharge through the strip-shaped water outlet 82. This not only improves the dehumidification effect and reduces the interference of water on subsequent detection, but also ensures the accuracy of dust concentration measurement in the flue gas. At the same time, the metal material has good corrosion resistance and thermal conductivity, extending its service life.

[0029] Example 3: The difference from Example 2 is that a pair of front end caps 43 are symmetrically provided at the end of the connecting pipe 41. Specifically: the upper front end cap is a 1 / 8 front end cap, and the lower front end cap is a φ8mm compression sleeve front end cap. The symmetrical arrangement of the two front end caps 43 facilitates the adaptation of the air circuit interface. The 1 / 8 front end cap can be connected to the factory's backflush air circuit for subsequent structural purging to reduce contamination. The lower φ8mm compression sleeve front end cap is used to seal and fix the venturi tube 42.

[0030] The flange B72 is welded and fixed to the outer circumference of the heating pipe 2; the heating pipe 2 adopts a double-layer metal pipe. The flange B72 is welded and fixed to the outer circumference of the heating pipe 2, which enhances the stability and sealing of the connection structure and ensures that there is no leakage during the flue gas transmission process. The double-layer metal pipe design of the heating pipe 2 not only improves the high temperature resistance and corrosion resistance of the device, but also effectively reduces heat loss and improves heating efficiency.

[0031] Example 4: The difference from Example 1 is that the connecting surfaces at both ends of the heating tube 2 are provided with sealing rings 9. The two ends of the heating tube 2 are connected to the probe connector 1 and the backflush connector 4 respectively through the sealing rings 9, which can ensure the overall sealing performance, effectively prevent the leakage of high humidity flue gas and external air interference, improve the heating and dehumidification efficiency, avoid measurement errors caused by air leakage, extend the service life of the equipment, and make the sampling data more stable and reliable.

[0032] The sampling tube 6 is an L-shaped tube. The L-shaped structure of the sampling tube 6 facilitates sampling, improves the applicability and ease of installation of the device, and helps to avoid areas of airflow disturbance in the flue, achieving more uniform and stable flue gas collection and reducing sampling errors.

[0033] It also includes a jet pump 10, which is welded to the side of the heating tube 2. The jet pump 10 is a commercially available product. Before use, the nozzle of the jet pump 10 is connected to the factory's high-pressure gas supply line or the outlet of the suction pump, and an existing pipe is connected to the outlet of the jet pump 10. The end of the pipe is then placed at the sampling position, and the suction port of the jet pump 10 is connected to the air chamber of the existing detection equipment. During use, the jet pump 10 is turned on, and it uses the jet principle to create negative pressure in the air chamber, which in turn creates negative pressure inside the backflush connector, driving the flue gas to flow into the air chamber for detection. After the flue gas detection is completed, the jet pump 10 returns the flue gas to the detection position. This design is compact, easy to install, and effectively improves flue gas delivery efficiency.

[0034] 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.

[0035] 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 novel flue gas collection device, characterized in that: The device includes a probe connector (1), a heating tube (2), a clamp (3), a backflush connector (4), and a heating rod (5). One end of the probe connector (1) is connected to a sampling tube (6), and the other end is provided with a flange A (71). One end of the heating tube (2) is provided with a steam-water separation tube (8), and the other end is connected to the backflush connector (4) through the clamp (3). The end of the heating tube (2) near the steam-water separation tube (8) is also provided with a flange B (72). The flange B (72) and the flange A (71) are connected by bolts, so that the steam-water separation tube (8) is located in the middle of the probe connector (1), and the end face of the probe connector (1) coincides with the end face of the heating tube (2). The heating rod (5) passes through the backflush connector (4), the heating tube (2), and the steam-water separation tube (8) in sequence, and the end extends into the probe connector (1).

2. The novel flue gas collection device as described in claim 1, characterized in that: The backflush connector (4) includes a connecting pipe (41), one end of which is connected to the heating pipe (2) via a clamp (3), and a venturi tube (42) is connected to the side of the connecting pipe (41); a sleeve (51) that matches the connecting pipe (41) is connected to the heating rod (5), and the sleeve (51) is detachably connected to the connecting pipe (41).

3. The novel flue gas collection device as described in claim 2, characterized in that: The connecting pipe (41) is provided with a pair of front end caps (43) symmetrically at its end.

4. A novel flue gas collection device as described in any one of claims 1-3, characterized in that: The steam-water separator (8) has several metal water guide plates (81) arranged in an alternating pattern inside, and strip-shaped water outlet holes (82) on the bottom surface.

5. The novel flue gas collection device as described in claim 1, characterized in that: The flange B (72) is welded and fixed to the outer periphery of the heating tube (2); the heating tube (2) is a double-layer metal tube.

6. The novel flue gas collection device as described in claim 1, characterized in that: The heating tube (2) is provided with sealing rings (9) on the connecting surfaces at both ends.

7. The novel flue gas collection device as described in claim 1, characterized in that: The sampling tube (6) is an L-shaped tube.

8. The novel flue gas collection device as described in claim 1, characterized in that: It also includes a jet pump (10), which is welded to the side of the heating tube (2).

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