A tail gas recovery sampling device
By introducing sampling structures and sealing components into the exhaust gas recovery device, the problem of the inability to sample in existing devices has been solved, achieving zero-leakage collection of exhaust gas and process data support, thereby improving the effect of reaction process optimization and environmentally friendly emissions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBI ZHONGHAO NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-31
AI Technical Summary
Existing exhaust gas recovery devices lack sampling capabilities, making it impossible to obtain gas samples from different reaction stages and treatment processes, which affects the optimization of reaction processes and the effective control of environmental emissions.
A tail gas recovery and sampling device was designed. It uses a blower to generate a negative pressure difference to extract gas and sets up a sampling structure on the sealing cover. By using the cooperation of the sampling connector and the sealing component, it can achieve zero tail gas leakage in non-sampling state and gas collection during sampling.
It achieves zero leakage of exhaust gas in non-sampling conditions, and can directly collect raw gas samples from the reaction equipment to provide data support for process adjustment and reduce production downtime.
Smart Images
Figure CN224581223U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical reaction equipment technology, and in particular to a tail gas recovery and sampling device. Background Technology
[0002] In chemical production processes, chemical reactions often produce large amounts of exhaust gas, which frequently contains dust, suspended particles, and toxic and harmful gases. Direct emission of these gases can cause serious environmental pollution, and the high temperature and pressure characteristics of the exhaust gas can also affect the stable operation of reaction equipment. To address these issues, various exhaust gas recovery and treatment devices have emerged in the prior art. For example, Chinese utility model patent CN206045710U discloses an exhaust gas recovery device that uses an induced draft fan to extract exhaust gas from the reaction tower, filters dust particles through a dust removal unit, and then sprays the gas through a deodorization unit to remove harmful components, ultimately achieving purified exhaust gas emission. Simultaneously, it can effectively regulate the pressure and temperature within the reaction tower, playing a positive role in environmental protection and stable equipment operation.
[0003] However, existing exhaust gas recovery devices mainly focus on the purification and emission of exhaust gases, only able to filter dust and harmful gases, but unable to perform targeted sampling and analysis of gases generated during chemical reactions. In actual chemical production, parameters such as the composition and concentration changes of exhaust gases are important indicators of reaction progress, determining whether the reaction is complete, assessing product purity, and optimizing process conditions. For example, by analyzing the content of specific components in the exhaust gas, it is possible to monitor in real time whether the reaction has reached the expected stage and adjust parameters such as reaction temperature and pressure in a timely manner; at the same time, sampling and testing the exhaust gas before emission can verify whether the purification treatment effect meets environmental standards.
[0004] The existing equipment lacks sampling capabilities, making it impossible to obtain gas samples from different reaction stages and processing steps. This makes it difficult to accurately grasp the changing patterns of exhaust gas composition through laboratory analysis, which in turn affects the optimization and adjustment of the reaction process and the effective control of environmental emissions. Utility Model Content
[0005] This invention proposes a tail gas recovery and sampling device, which solves the problem that existing devices lack sampling functions and cannot obtain gas samples.
[0006] The technical solution of this utility model is implemented as follows: A tail gas recovery and sampling device includes an induced draft fan and a sealing cover. The sealing cover is connected to the gas output end of the reaction equipment, and the induced draft fan is connected to the sealing cover via a gas delivery pipeline. A sampling structure is provided on the sealing cover. The sampling structure includes a sampling connector and a connector plug. The sampling connector is located on the sealing cover, and the connector plug is elastically connected to the sealing cover, with the connector plug engaging with the sampling connector. The induced draft fan generates a negative pressure difference to extract the gases and vapors produced during the reaction process and deliver them to the tail gas treatment system, preventing fugitive emissions of gases from the reaction vessel and spillage of reactants. Furthermore, the sampling structure on the sealing cover allows personnel to easily obtain the gases produced by the chemical reaction. The combination of the sampling connector and the plug ensures zero tail gas leakage in non-sampling conditions and allows for direct collection of raw gas samples from the reaction equipment during sampling, enabling analysis of the concentration of unreacted raw materials and providing direct data support for process adjustments.
[0007] The connector sealing component includes a sealing tube that is sleeved on the sampling connector. The sealing tube has an outer hole on its side wall, and the sampling connector has an inner hole on its side wall. The inner hole is located below the sealing cap, and a plug is located at the lower end of the sampling connector. In the sampling state, the outer hole and inner hole are aligned; in the non-sampling state, they are misaligned. Adjusting the axial relative position of the sealing tube and the sampling connector allows for adjustment of the inner and outer hole positions. This ensures zero leakage of exhaust gas in the non-sampling state and allows for rapid connection between the inner and outer holes during sampling, enabling direct collection of the original gas sample from the reaction equipment.
[0008] The sealing cap is equipped with an upper retaining ring, which is fitted onto the sealing tube and mates with the outer hole. The upper retaining ring seals the outer hole, preventing exhaust gas from passing through the sealing cap via the outer hole.
[0009] The sealing tube is sealed to the upper baffle ring. This prevents exhaust gas from passing through the sealing cover via the gap between the sealing tube and the upper baffle ring, ensuring the airtightness of the sampling structure.
[0010] The lower end of the sealing tube is equipped with a lower retaining ring, which is sleeved on the sampling connector and mates with the inner hole. The lower retaining ring seals the inner hole, achieving zero leakage of exhaust gas when not sampling.
[0011] The sealing tube and the sampling connector are sealed together. This prevents exhaust gas from passing through the sealing cover via the gap between the sealing tube and the sampling connector, ensuring the airtightness of the sampling structure.
[0012] The upper end of the sealing tube is equipped with a pressing plate, and a spring is installed between the pressing plate and the sealing cap. Under normal conditions, the spring provides elastic force to the pressing plate with the sealing cap as support, so that the outer hole and the inner hole are misaligned, achieving zero leakage of exhaust gas in non-sampling conditions.
[0013] The sealing tube is equipped with a limiting plate located below the outer hole, which mates with the lower surface of the sealing cap. The limiting plate restricts the movement range of the sealing tube, preventing it from detaching from the sampling connector under the action of the spring, thus ensuring the stability of the structure.
[0014] The sampling connector is connected to the sealing cap via a support rod. The sealing tube has a sliding groove, and the support rod slides into the groove. The support rod provides support for the sampling connector, ensuring stable installation of the sampling connector on the sealing cap. The sliding groove prevents interference between the support rod and the sealing tube.
[0015] The gas delivery pipeline includes a corrugated pipe. The corrugated pipe is made of high-temperature and corrosion-resistant material, which facilitates pipe connection and reduces the installation difficulty of the device.
[0016] The beneficial effects of this invention are as follows: By generating a negative pressure difference through an induced draft fan, the gas and vapor produced in the reaction vessel during the production process are extracted and transported to the tail gas treatment system, thus eliminating the unorganized emission of gas from the reaction vessel and the leakage and splashing of reactants; in addition, a sampling structure is set on the sealing cover, which makes it convenient for staff to obtain the gas produced by the chemical reaction through the sampling structure; through the cooperation of the sampling connector and the sealing component, zero leakage of tail gas can be ensured in the non-sampling state, and the original gas sample in the reaction equipment can be directly collected during sampling to analyze the concentration of unreacted raw materials, providing direct data support for process adjustment.
[0017] The flexible sealing device design allows the sampling operation to be completed in just two steps: pressing and releasing. It can be operated by a single person, greatly reducing production downtime. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of a tail gas recovery and sampling device according to the present invention; Figure 2 This is a schematic diagram of the sealing cap and sampling structure; Figure 3 This is a half-section diagram of the sealing cap; Figure 4 This is a schematic diagram of a half-section of the sampling structure.
[0020] In the diagram: 1. Exhaust fan, 2. Gas delivery pipeline, 3. Corrugated pipe, 4. Sealing cap, 5. Joint sealing component, 41. Upper retaining ring, 42. Sampling connector, 43. Support rod, 44. Inner hole, 45. Plug, 51. Pressing plate, 52. Sealing pipe, 53. Slide groove, 54. Outer hole, 55. Limiting plate, 56. Lower retaining ring. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1, as Figure 1 , Figure 2 As shown, a tail gas recovery and sampling device includes an induced draft fan 1 and a sealing cover 4. The sealing cover 4 is connected to the gas output end of the reaction equipment. The induced draft fan 1 is connected to the sealing cover 4 through a gas conveying pipe 2. The sealing cover 4 is provided with a sampling structure. The sampling structure includes a sampling connector 42 and a connector sealing element 5. The sampling connector 42 is disposed on the sealing cover 4, and the connector sealing element 5 is elastically connected to the sealing cover 4, and the connector sealing element 5 and the sampling connector 42 are sealed together. The induced draft fan 1 creates a negative pressure difference between the two ends of the gas conveying pipe 2. The gas generated by the reaction equipment reaches the position of the induced draft fan 1 through the gas conveying pipe 2, and then sends the gas to the tail gas treatment system. After being treated by the tail gas treatment system, it is discharged into the atmosphere. The sealing cover 4 can effectively prevent the leakage of high-temperature steam and prevent material splashing.
[0023] The sampling structure allows staff to directly collect samples of the raw gas generated inside the reaction equipment. The collected gas does not pass through the induced draft fan or purification unit. By analyzing the concentration of unreacted raw materials in the raw gas, direct data support is provided for process adjustments. At the same time, the combination of the sealing pipe and the sampling connector ensures zero leakage of tail gas when not sampling, and allows direct collection of raw gas samples inside the reaction equipment during sampling, preventing tail gas leakage from the sampling structure location.
[0024] Furthermore, such as Figure 4As shown, the connector sealing component 5 includes a sealing tube 52, which is sleeved on the sampling connector 42. The sealing tube 52 has an outer hole 54 on its side wall, and the sampling connector 42 has an inner hole 44 on its side wall. The inner hole 44 is located below the sealing cap 4. The lower end of the sampling connector 42 has a plug 45. In the sampling state, the outer hole 54 and the inner hole 44 are in corresponding positions. In the non-sampling state, the outer hole 54 and the inner hole 44 are misaligned. In this embodiment, the sidewall of the sealing tube 52 is provided with four evenly arranged outer holes 54, and the sidewall of the sampling connector 42 is provided with four evenly arranged inner holes 44. The sealing tube 52 and the sampling connector 42 are slidably fitted together. That is, by adjusting the axial relative position of the connector sealing member 5 on the sampling connector 42, the relative positions of the outer holes 54 and the inner holes 44 can be switched. Specifically, when the connector sealing member 5 moves to the lower side of the sealing cover 4, the outer holes 54 and the inner holes 44 are aligned, and the sampling structure is open. At this time, the exhaust gas reaches the upper side of the sealing cover 4 through the sampling connector 42. When the connector sealing member 5 moves to the upper side of the sealing cover 4, the outer holes 54 and the inner holes 44 are misaligned, and the sampling structure is closed.
[0025] Furthermore, such as Figure 3 As shown, the sealing cover 4 is provided with an upper retaining ring 41, which is sleeved on the sealing tube 52 and mates with the outer hole 54. The upper retaining ring 41 seals the outer hole 54 to prevent exhaust gas from passing through the outer hole 54 and through the sealing cover 4.
[0026] Furthermore, the sealing tube 52 is sealed to the upper retaining ring 41. In this embodiment, the outer side of the sealing tube 52 is provided with an outer sealing ring groove, and a sealing ring is provided inside the outer sealing ring groove. The outer sealing ring groove is located on the upper side of the outer hole 54; this prevents exhaust gas from passing through the gap between the sealing tube 52 and the upper retaining ring 41 and passing through the sealing cover, thus ensuring the sealing of the sampling structure position.
[0027] Furthermore, a lower baffle ring 56 is provided at the lower end of the sealing pipe 5. The lower baffle ring 56 is sleeved on the sampling connector 42 and mates with the inner hole 44. The lower baffle ring 56 seals the inner hole 44, achieving zero leakage of exhaust gas in the non-sampling state.
[0028] Furthermore, the sealing tube 52 and the sampling connector 42 are sealed together. In this embodiment, the inner side of the sealing tube 52 is provided with an inner sealing ring groove, and a sealing ring is provided in the inner sealing ring groove. The inner sealing ring groove is located on the upper side of the outer hole 54; this prevents exhaust gas from passing through the gap between the sealing tube 52 and the sampling connector 42 and passing through the sealing cover, thus ensuring the sealing of the sampling structure position.
[0029] Example 2, based on Example 1, provides a tail gas recovery sampling device. A pressing plate 51 is provided at the upper end of the sealing pipe 52, and a spring is provided between the pressing plate 51 and the sealing cover 4. In this example, the spring is a compression spring. Under normal conditions, the spring provides elastic force to the pressing plate 51 with the sealing cover 4 as support, causing the outer hole 54 and the inner hole 44 to be misaligned, achieving zero leakage of tail gas in the non-sampling state.
[0030] Furthermore, a limiting plate 55 is provided on the sealing tube 52. The limiting plate 55 is located below the outer hole 54 and cooperates with the lower surface of the sealing cover 4. The limiting plate 55 restricts the movement range of the sealing tube 52 to prevent the sealing tube 52 from detaching from the sampling connector 42 under the action of the spring, thus ensuring the stability of the structure.
[0031] Furthermore, the sampling connector 42 is connected to the sealing cap 4 via a support rod 43, and the sealing tube 52 is provided with a sliding groove 53, with the support rod 43 slidingly engaging with the sliding groove 53. In this embodiment, there are four support rods 43, and each support rod 43 is evenly arranged to ensure the installation stability of the sampling connector 42 on the sealing cap 4; the sliding groove 53 is provided to avoid interference between the support rod 43 and the sealing tube 52.
[0032] Furthermore, the gas transmission pipeline 2 includes a corrugated pipe 3. The corrugated pipe 3 is made of high-temperature corrosion resistant material, which facilitates pipe connection of the gas transmission pipeline and reduces the installation difficulty of the device.
[0033] Exhaust gas sampling process: The sampling bottle is inverted on the sampling structure, with the bottle mouth attached to the pressing plate 51. The sampling bottle presses down on the pressing plate 51, and the sealing tube 52 slides down along the sampling connector 42 until the outer hole 54 corresponds to the inner hole 44. The sampling structure is open, and the exhaust gas generated in the reaction equipment enters the sampling bottle through the inner hole 44 and the outer hole 54 to achieve exhaust gas sampling. After sampling is completed, the sampling bottle is released, the pressing plate 51 is released, the connector sealing part 5 returns to its original position under the action of the spring, the outer hole 54 and the inner hole 44 are misaligned again, the sampling structure is closed, and the sealing state is restored.
[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A tail gas recovery sampling device, characterized by, It includes an induced draft fan (1) and a sealing cover (4). The sealing cover (4) is connected to the gas output end of the reaction equipment. The induced draft fan (1) is connected to the sealing cover (4) through a gas delivery pipe (2). The sealing cover (4) is provided with a sampling structure. The sampling structure includes a sampling connector (42) and a connector plug (5). The sampling connector (42) is set on the sealing cover (4). The connector plug (5) is elastically connected to the sealing cover (4). The connector plug (5) is sealed and cooperates with the sampling connector (42).
2. The exhaust gas recovery and sampling device according to claim 1, characterized in that, The connector sealing component (5) includes a sealing tube (52), which is sleeved on the sampling connector (42). The sealing tube (52) has an outer hole (54) on its side wall and an inner hole (44) on its side wall. The inner hole (44) is located below the sealing cap (4). The lower end of the sampling connector (42) has a plug (45). In the sampling state, the outer hole (54) and the inner hole (44) are in the same position. In the non-sampling state, the outer hole (54) and the inner hole (44) are misaligned.
3. The tail gas recovery sampling device of claim 2, wherein, The sealing cap (4) is provided with an upper retaining ring (41), which is fitted on the sealing tube (52) and is in conjunction with the outer hole (54).
4. The exhaust gas recovery and sampling device according to claim 3, characterized in that, The sealing tube (52) and the upper retaining ring (41) are sealed together.
5. The exhaust gas recovery and sampling device according to claim 2, characterized in that, The lower end of the plugging tube (5) is provided with a lower retaining ring (56), which is sleeved on the sampling connector (42) and is engaged with the inner hole (44).
6. The tail gas recovery sampling device of claim 5, wherein, The plugging tube (52) and the sampling connector (42) are sealed together.
7. The exhaust gas recovery sampling device according to any one of claims 1 to 6, characterized in that The upper end of the sealing tube (52) is provided with a pressing plate (51), and a spring is provided between the pressing plate (51) and the sealing cap (4).
8. The tail gas recovery sampling device of claim 7, wherein, The sealing tube (52) is provided with a limiting plate (55), which is located on the lower side of the outer hole (54) and is engaged with the lower surface of the sealing cover (4).
9. The exhaust gas recovery and sampling device according to claim 1 or 8, characterized in that, The sampling connector (42) is connected to the sealing cap (4) via the support rod (43). The sealing tube (52) is provided with a groove (53), and the support rod (43) and the groove (53) slide together.
10. The tail gas recovery sampling device of claim 9, wherein, The gas transmission pipeline (2) includes a bellows (3).