A detachable flue gas collecting device

Abstract

The utility model discloses a detachable flue gas collection device, including main pipe body and sampling pipe, the main pipe body inside is equipped with heat tracing assembly and gas pipe, its near import end detachably has filter assembly, and import end is equipped with flange plate A, heat tracing assembly is fixed in the main pipe body, and the gas pipe is sealedly connected with filter assembly one end after passing through heat tracing assembly, the flange plate B is set on the sampling pipe, and its end is detachably inserted into the main pipe body and is sealedly connected with filter assembly other end, and flange plate A and flange plate B are connected through bolt. The utility model discloses through flange quick release structure realizes the quick assembly of sampling pipe, filter assembly and gas pipe, and the quick release, is convenient for washing maintenance, and heat tracing assembly carries out non -contact heating to gas pipe, avoids heating element contact flue gas, eliminates the risk of combustible gas sampling combustion and explosion, prevents sample pyrolysis, and guarantees sample authenticity, and modular design improves maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of flue gas collection technology, specifically to a detachable flue gas collection device. Background Technology

[0002] Flue gas sampling is a crucial step in environmental monitoring and industrial process analysis, with the core objective of obtaining representative gas samples with undistorted composition. Currently, conventional flue gas sampling devices mostly employ a fixed structure where the sampling probe, filter, and heating pipeline are integrated or rigidly connected. This design results in poor device flexibility, making it difficult to adapt to the sampling requirements of different flue gas conditions, affecting the accurate positioning of the sampling location and the representativeness of the sample. At the same time, existing devices generally use a heating method where the heating element is in direct contact with the flue gas. For flue gas containing flammable components such as hydrogen, methane, and carbon monoxide, there is a significant safety hazard of combustion or explosion caused by overheating of the heating element surface or the generation of electric sparks.

[0003] In addition, the fixed structure makes the disassembly, cleaning, or replacement of easily contaminated components such as probes, filters, and pipelines extremely inconvenient and cumbersome. Existing technologies struggle to balance sampling safety, sample fidelity, ease of maintenance, and on-site adaptability. Therefore, there is an urgent need to design a flue gas sampling device that can solve these problems. Utility Model Content

[0004] To address the shortcomings of existing flue gas collection devices, such as non-removable components, difficulty in cleaning and maintenance, and safety hazards associated with direct contact with flue gas during heat tracing, this invention provides a detachable flue gas collection device that is easy to disassemble, clean, and maintain, does not involve direct contact with flue gas during heat tracing, and is safe and reliable to use.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A detachable flue gas collection device includes a main pipe and a sampling pipe. The main pipe contains a heat tracing component and a gas delivery pipe. A filter component is detachably mounted on the main pipe near the inlet end. A flange A is provided at the inlet end. The heat tracing component is fixedly mounted inside the main pipe. The gas delivery pipe passes through the heat tracing component and is sealed to one end of the filter component. A flange B is fitted onto the body of the sampling pipe. The end of the sampling pipe is detachably inserted into the main pipe and sealed to the other end of the filter component. Flange A and flange B are fitted together and connected by bolts.

[0006] Furthermore, the heat tracing assembly includes a pair of heat-conducting sleeves, a threaded heating wire, and a temperature controller. The heat-conducting sleeves have a through hole in the center, and the two heat-conducting sleeves are axially spaced inside the main pipe body. Their outer circumferences are fixedly connected to the inner wall of the main pipe body, and the threaded heating wire is spirally wound in the space between the two heat-conducting sleeves. The heating wire has no direct contact with the gas supply pipe. The gas supply pipe passes through the central through hole of the two heat-conducting sleeves in sequence and extends to connect with the filter assembly. The temperature controller is located outside the main pipe body and is electrically connected to the threaded heating wire through a sealing lead wire passing through the wall of the main pipe body to control the heating temperature. Before sampling, the required heating temperature is set by the temperature controller and the threaded heating wire is activated. The heat is efficiently and evenly conducted to the entire wall of the main pipe through the heat-conducting sleeve in close contact with it, thereby indirectly heating the gas delivery pipe that runs through the internal through-hole. This ensures that the flue gas flowing through the gas delivery pipe can be continuously maintained above the set temperature, effectively preventing flue gas condensation. The threaded heating wire is isolated from the flue gas, eliminating the safety hazards caused by direct contact. The heat-conducting sleeve ensures the uniform distribution of heat, effectively avoiding local overcooling or overheating. This not only prevents flue gas condensation distortion but also improves heating safety and sample reliability.

[0007] Furthermore, the through hole of the heat-conducting sleeve is a threaded through hole; the outer wall of the gas supply pipe is provided with an external thread corresponding to the threaded through hole. The external thread on the outer wall of the gas supply pipe engages with the threaded through hole of the heat-conducting sleeve, realizing the rapid assembly and reliable fixation of the gas supply pipe. The threaded engagement not only ensures close contact between the gas supply pipe and the heating component, optimizing heat conduction efficiency, but also achieves stable positioning through mechanical self-locking, avoiding loosening caused by vibration or temperature difference changes, thus improving the stability and safety of the structure.

[0008] Furthermore, the main pipe has a horizontally penetrating mounting hole on its upper side, through which the filter assembly is detachably installed. The filter assembly includes a mounting shell and a filter cylinder. The mounting shell has an inner cavity in the middle to accommodate the filter cylinder, and connection holes with O-rings at both ends for sealing connection with the sampling tube or gas delivery tube. The filter cylinder can be selected from existing glass fiber filter cylinders, corundum filter cylinders, or polytetrafluoroethylene filter membranes, etc., according to actual collection needs. The mounting shell is inserted horizontally into the main pipe through the mounting hole and is limited by the sampling tube or gas delivery tube connected to its end. When disassembling, the connection between the sampling tube and the mounting shell is first disconnected, and then the entire filter assembly is slid out along the mounting hole, and vice versa. The mounting shell containing the filter cylinder can be installed or removed entirely through the mounting hole on the side of the main pipe, realizing a side-mounted modular design of the filter assembly. It can be easily removed during cleaning and maintenance, and the connection holes on both sides of the mounting shell form a detachable connection with the sampling tube and gas delivery tube, which not only ensures the air circuit is sealed and connected, but also realizes the quick assembly and disassembly of the overall structure.

[0009] Furthermore, the mounting housing is composed of outer shell A and outer shell B mating together. The mating surface of outer shell A is provided with a sealing gasket and several slots, while outer shell B has corresponding locking posts. When the locking posts are inserted into the slots, an interference fit is created, achieving a sealed lock. Connection holes are respectively located on the outer surfaces of outer shell A and outer shell B. The interlocking of the slots in outer shell A and the locking posts in outer shell B forms a quickly detachable filter chamber, facilitating filter cartridge replacement. The connection holes on both sides allow for direct connection to sampling tubes and gas delivery tubes.

[0010] Furthermore, the outer sides of both housing A and housing B are provided with protruding handles. The surfaces of the handles have anti-slip textures, making it easy for operators to grip and apply force during disassembly and assembly. During disassembly and assembly, the handles provide clear points of application, facilitating the removal or installation of the filter assembly as a whole.

[0011] Furthermore, the main body is made of high-temperature resistant stainless steel, and an insulation layer is wrapped around the outside of the stainless steel; a handle is provided on the side of the main body away from the sampling tube. The insulation design of the main body improves the safety of use, and the handle allows for stable force application during installation, disassembly, or transportation of the entire sampling device, facilitating operation.

[0012] How to use this utility model: During on-site sampling, the sampling tube is first inserted into the flue. The outlet end of the gas delivery pipe is connected to the flue gas analyzer, sampling bag, or sampling bottle via a pipeline. The other end of the analyzer or sampling container is then connected to an external suction pump. The heating assembly is connected to an external power source. The heating assembly is then started to heat the flue gas, and the suction pump is turned on. The negative pressure generated by the suction pump draws the flue gas sequentially into the sampling tube. After passing through the particulate filter, the gas flows through the heated gas delivery pipe inside the main pipe and is finally discharged from the outlet end. The gas then enters the subsequent flue gas analyzer for real-time concentration measurement, or is filled into a sampling bag or sampling bottle and sealed for laboratory analysis. After sampling, the connection is disconnected. During maintenance, the sampling tube can be quickly removed through the separation flange, and the filter assembly and gas delivery pipe can also be extracted for cleaning and maintenance.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. This utility model achieves rapid separation and assembly of the sampling tube, filter assembly, and gas delivery pipe through a flange quick-release structure, facilitating cleaning, replacement, and maintenance, and improving operational efficiency; the heating assembly is located inside the main body and provides non-contact heating of the gas delivery pipe, avoiding direct contact between the heating element and the flue gas, fundamentally eliminating the risk of combustion and explosion during the sampling process of flammable gases such as hydrogen and methane, while preventing pyrolysis of sample components due to local overheating, ensuring the authenticity of the sample and the accuracy of the analysis; the modular design enhances the ease of cleaning and maintenance of the device.

[0014] 2. This utility model achieves safe and uniform heating of the gas delivery pipe by using a threaded heating wire in conjunction with a heat-conducting sleeve, effectively preventing condensation and eliminating safety hazards. The threaded connection between the gas delivery pipe and the heat-conducting sleeve optimizes heat conduction and ensures structural stability. The filter assembly adopts a side-mounted quick-release modular design, combined with a split snap-on mounting shell and a handheld block, making filter replacement and component cleaning extremely convenient. The main body is equipped with a heat insulation layer and a handle, improving operational safety and portability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a structural diagram showing the internal component arrangement of this utility model.

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0018] Attached image labels: Main pipe-1, sampling tube-2, heat tracing assembly-3, heat conducting sleeve-31, threaded heating wire-32, temperature controller-33, gas supply pipe-4, filter assembly-5, mounting shell-51, filter cartridge-52, outer shell A-53, sealing gasket-531, outer shell B-54, locking post-541, hand-held block-55, flange plate A-61, flange plate B-62, bolt-63, handle-7. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Example 1: A detachable flue gas collection device includes a main pipe 1 and a sampling pipe 2. The main pipe 1 is equipped with a heat tracing component 3 and a gas delivery pipe 4 inside. A filter component 5 is detachably installed on the main pipe 1 near the inlet end. A flange plate A61 is provided at the inlet end. The heat tracing component 3 is fixedly installed inside the main pipe 1. The gas delivery pipe 4 passes through the heat tracing component 3 and is sealed to one end of the filter component 5. A flange plate B62 is fitted on the body of the sampling pipe 2. The end of the sampling pipe 2 is detachably inserted into the main pipe 1 and sealed to the other end of the filter component 5. At the same time, the flange plate A61 and the flange plate B62 are fitted together and connected by bolts 63.

[0021] During on-site sampling, the sampling tube 2 is first inserted into the flue. The outlet end of the gas delivery pipe 4 is connected to the flue gas analyzer, sampling bag, or sampling bottle via a pipeline. The other end of the analyzer or sampling container is then connected to an external suction pump. The heating assembly 3 is connected to an external power source. The heating assembly 3 is then started to heat the flue gas, and the suction pump is turned on. The negative pressure generated by the suction pump draws the flue gas sequentially into the sampling tube 2. After passing through the particulate filter assembly 5, the flue gas flows through the heated gas delivery pipe 4 inside the main body 1 and is finally discharged from the outlet end. The flue gas enters the subsequent flue gas analyzer for real-time concentration measurement, or it is filled into a sampling bag or sampling bottle and sealed for laboratory analysis. After sampling, the connection is disconnected. During maintenance, the sampling tube 2 can be quickly removed through the separation flange. At the same time, the filter assembly 5 and the gas delivery pipe 4 can also be extracted for cleaning and maintenance.

[0022] Example 2: Unlike Example 1, the heat tracing assembly 3 includes a pair of heat-conducting sleeves 31, a threaded heating wire 32, and a temperature controller 33. The heat-conducting sleeves 31 have a through hole in the center. The two heat-conducting sleeves 31 are axially spaced inside the main body 1, and their outer periphery is fixedly connected to the inner wall of the main body 1. The threaded heating wire 32 is spirally wound in the space between the two heat-conducting sleeves 31. The heating wire has no direct contact with the gas supply pipe 4. The gas supply pipe 4 passes through the central through hole of the two heat-conducting sleeves 31 in sequence and extends to connect with the filter assembly 5. The temperature controller 33 is located outside the main body 1 and is electrically connected to the threaded heating wire 32 through a sealing lead wire passing through the wall of the main body 1 to control the heating temperature. Before sampling, the required heating temperature is set by the temperature controller 33 and the threaded heating wire 32 is activated. The heat is efficiently and evenly conducted to the entire wall of the main body 1 through the heat-conducting sleeve 31 in close contact with it, thereby indirectly heating the gas supply pipe 4 that runs through the internal through hole. This ensures that the flue gas flowing through the gas supply pipe 4 can be continuously maintained above the set temperature, effectively preventing flue gas condensation. The threaded heating wire 32 is isolated from the flue gas, eliminating the safety hazards caused by direct contact. The heat-conducting sleeve 31 ensures the uniform distribution of heat, effectively avoiding local overcooling or overheating. This not only prevents flue gas condensation distortion but also improves heating safety and sample reliability.

[0023] The upper side of the main body 1 is provided with a horizontally through mounting hole, through which the filter assembly 5 is detachably installed into the main body 1; the filter assembly 5 includes a mounting shell 51 and a filter cylinder 52. The mounting shell 51 has an inner cavity in the middle to accommodate the filter cylinder 52, and connection holes with O-rings are provided at both ends for sealing connection with the sampling tube 2 or the gas delivery tube 4. The filter cartridge 52 is selected from existing glass fiber filter cartridges, corundum filter cartridges, or polytetrafluoroethylene filter membranes according to actual collection needs. The mounting shell 51 is inserted horizontally into the main body 1 through the mounting hole and is limited by the sampling tube 2 or gas delivery tube 4 connected to the end. When disassembling, first disconnect the connection between the sampling tube 2 and the mounting shell 51, and then slide the entire filter assembly 5 out along the mounting hole, and vice versa. The mounting shell 51 containing the filter cartridge 52 can be installed or removed as a whole through the mounting hole on the side of the main pipe, realizing the side-mounted modular design of the filter assembly 5. It can be easily removed during cleaning and maintenance. The connecting holes on both sides of the mounting shell 51 form a detachable docking with the sampling tube 2 and the gas delivery tube 4, which not only ensures the air circuit is sealed and connected, but also realizes the quick assembly and disassembly of the overall structure.

[0024] The main body 1 is made of high-temperature resistant stainless steel, and a heat insulation layer is wrapped around the outside of the stainless steel. A handle 7 is provided on the side of the main body 1 away from the sampling tube 2. The heat insulation design of the main body 1 improves the safety of use. When installing, disassembling or moving the entire collection device, the handle 7 can be used to apply force stably, making it easy to operate.

[0025] Example 3: Unlike Example 2, the through hole of the heat-conducting sleeve 31 is a threaded through hole; the outer wall of the gas supply pipe 4 is provided with an external thread corresponding to the threaded through hole. The external thread on the outer wall of the gas supply pipe 4 engages with the threaded through hole of the heat-conducting sleeve 31, realizing the rapid assembly and reliable fixation of the gas supply pipe 4. The threaded engagement not only ensures close contact between the gas supply pipe 4 and the heating component, optimizing heat conduction efficiency, but also achieves stable positioning through mechanical self-locking, avoiding loosening caused by vibration or temperature difference changes, thus improving the stability and safety of the structure.

[0026] The mounting housing 51 is composed of outer shell A53 and outer shell B54 mating together. The mating surface of outer shell A53 is provided with a sealing gasket 531 and several slots. Correspondingly, outer shell B54 is provided with locking posts 541. When the locking posts 541 are inserted into the slots, an interference fit is achieved, resulting in a sealed lock. Connection holes are respectively located on the outer surfaces of outer shell A53 and outer shell B54. The slots of outer shell A53 and the locking posts 541 of outer shell B54 interlock to form a quickly disassembled filter chamber, facilitating the replacement of the filter cartridge 52. The connection holes on both sides allow for direct connection with the sampling tube 2 and the gas delivery tube 4.

[0027] The outer sides of the outer casings A53 and B54 are provided with protruding handle blocks 55. The surface of the handle blocks 55 has anti-slip texture, which makes it easy for operators to grip and apply force during disassembly and assembly. During disassembly and assembly operations, the handle blocks 55 provide clear points of force application, making it easy to apply force and facilitate the overall removal or installation of the filter assembly 5.

[0028] 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.

[0029] 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 detachable flue gas collection device, characterized in that: The system includes a main body (1) and a sampling tube (2). The main body (1) is equipped with a heat tracing component (3) and a gas delivery pipe (4). A filter component (5) is detachably installed on the main body (1) near the inlet end. A flange plate A (61) is installed at the inlet end. The heat tracing component (3) is fixedly installed inside the main body (1). The gas delivery pipe (4) passes through the heat tracing component (3) and is sealed to one end of the filter component (5). A flange plate B (62) is fitted on the body of the sampling tube (2). The end of the sampling tube (2) is detachably inserted into the main body (1) and sealed to the other end of the filter component (5). At the same time, the flange plate A (61) and the flange plate B (62) are fitted together and connected by bolts (63).

2. The detachable flue gas collection device as described in claim 1, characterized in that: The heat tracing assembly (3) includes a pair of heat-conducting sleeves (31), a threaded heating wire (32), and a temperature controller (33). The heat-conducting sleeves (31) have a through hole in the center. The two heat-conducting sleeves (31) are axially spaced inside the main body (1), and their outer periphery is fixedly connected to the inner wall of the main body (1). The threaded heating wire (32) is spirally wound in the space between the two heat-conducting sleeves (31). The heating wire has no direct contact with the gas supply pipe (4). The gas supply pipe (4) passes through the central through hole of the two heat-conducting sleeves (31) in sequence and extends to connect with the filter assembly (5). The temperature controller (33) is located outside the main body (1) and is electrically connected to the threaded heating wire (32) through a sealing lead wire that passes through the wall of the main body (1) to control the heating temperature.

3. The detachable flue gas collection device as described in claim 2, characterized in that: The through hole of the heat-conducting sleeve (31) is a threaded through hole; the outer wall of the gas supply pipe (4) is provided with an external thread corresponding to the threaded through hole.

4. The detachable flue gas collection device as described in claim 1, characterized in that: The main body (1) has a horizontally through mounting hole on its upper side, through which the filter assembly (5) is detachably installed into the main body (1). The filter assembly (5) includes a mounting shell (51) and a filter cylinder (52). The mounting shell (51) has an inner cavity in the middle to accommodate the filter cylinder (52), and connection holes with O-rings are provided at both ends for sealing connection with the sampling tube (2) or the gas delivery tube (4).

5. The detachable flue gas collection device as described in claim 4, characterized in that: The mounting shell (51) is composed of outer shell A (53) and outer shell B (54) mating together; the mating surface of outer shell A (53) is provided with a sealing gasket (531) and several slots, and the corresponding position of outer shell B (54) is provided with a locking post (541). After the locking post (541) is inserted into the slot, an interference fit is generated to achieve sealing and locking, and the connecting holes are respectively provided on the outer surfaces of outer shell A (53) and outer shell B (54).

6. The detachable flue gas collection device as described in claim 5, characterized in that: The outer sides of the outer casing A (53) and the outer casing B (54) are provided with protruding hand-held blocks (55), and the surface of the hand-held blocks (55) has anti-slip texture, which makes it easy for operators to hold and apply force during disassembly and assembly.

7. The detachable flue gas collection device as described in claim 1, characterized in that: The main body (1) is made of high-temperature resistant stainless steel and is covered with a heat insulation layer on the outside of the stainless steel; a handle (7) is provided on the side of the main body (1) away from the sampling tube (2).

Images