Sealing joint of denitration CEMS flue gas sampling system
By designing a cross-shaped, curved edge clamping hoop and filter membrane structure, combined with a spiral electric heating tube, the problems of easy corrosion and clogging of the sealing joints were solved, achieving long-term sealing and anti-clogging effects for the denitrification CEMS flue gas sampling system.
Patent Information
- Application Number
- CN202520748755.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-04-21
AI Technical Summary
The existing denitrification CEMS flue gas sampling system's sealing joints are susceptible to corrosion and blockage, resulting in insufficient sealing performance. In particular, in high dust environments, particulate matter can accumulate and NH3 can react with SO3/HCl to form ammonium bisulfate or ammonium chloride crystals, leading to decreased sealing performance and blockage.
A sealing joint with cross-shaped flanges and adjustment components was designed. The sealing performance is maintained by the clamping clamp and adjustment components, and a filter membrane is set in the joint body to intercept particulate matter. At the same time, the spiral electric heating tube can prevent crystal deposition. Heat-resistant materials and heat insulation structure are used to maintain the sealing performance.
It achieves long-term sealing performance in high-dust environments, prevents clogging, ensures stable operation of the denitrification CEMS flue gas sampling system, and provides better sealing performance and anti-clogging effect.
Smart Images
Figure CN223839938U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of sealing joint technology, specifically a sealing joint for a denitrification CEMS flue gas sampling system. Background Technology
[0002] The denitrification CEMS flue gas sampling system is a key piece of equipment used for continuous monitoring of pollutant emissions after denitrification (SCR / SNCR) in industrial flue gas from coal-fired power plants, steel mills, cement plants, and other industrial facilities. This system measures parameters such as NOx (NO / NO2), NH3 (escaping ammonia), O2, humidity, and flow rate in real time to ensure environmental compliance and provide data support for optimizing the denitrification process. Sealing joints are essential connecting parts in the denitrification CEMS flue gas sampling system, used to connect gas supply pipes to each other, and to the inlet nozzles of the detection equipment.
[0003] Existing sealing joints mainly consist of a pipe body fitted onto the gas supply pipe and / or inlet nozzle. Sealing relies primarily on sealing materials. However, in practical applications, it has been found that with prolonged use, the sealing material inevitably becomes corroded and deformed by the denitrification CEMS flue gas, leading to a decrease in sealing performance. When the flue gas has a high dust content, particulate matter easily accumulates in the joint gaps, especially in areas with lower flow velocities. Escaping NH3 reacts with SO3 / HCl in the flue gas to form ammonium bisulfate (ABS) or ammonium chloride, which crystallize and deposit in low-temperature areas such as joints, thus clogging the sealing joint. Utility Model Content
[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a sealing joint for a denitrification CEMS flue gas sampling system, which solves the technical problems mentioned in the background art, such as insufficient sealing and easy clogging of existing denitrification CEMS flue gas sampling system sealing joints.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0006] A sealing connector for a denitrification CEMS flue gas sampling system includes a connector body. Both ends of the connector body have annular insertion grooves. Both ends of the connector body are fitted with clamping clamps. The clamping clamps have a first raised edge and a second raised edge formed at their respective ends, and the first and second raised edges are arranged intersectingly. An adjusting component is provided between the first and second raised edges to push the first or second raised edge, thereby tightening the clamping clamp and further adjusting the tightening during application to ensure the sealing performance of the connector. A filter membrane is provided at the port inside the insertion groove of the connector body to intercept particulate matter in the denitrification CEMS flue gas and alleviate the clogging problem of the sealing connector.
[0007] Furthermore, the connector body includes an inner tube, an outer tube, and a connecting part between the two, with a insertion groove formed at each end of the connecting part between the inner tube and the outer tube.
[0008] Furthermore, both the first and second raised edges are inclined or arc-shaped.
[0009] Furthermore, a strip-shaped notch is provided on the side where the first curved edge is located, and the second curved edge passes through the strip-shaped notch on the first curved edge.
[0010] Furthermore, the adjustment assembly includes a fixing block fixedly connected to the first or second raised edge, a screw threaded through the fixing block and threadedly connected to the fixing block, an abutment block rotatably connected to the head end of the screw, and a knob fixed to the end of the screw facing away from the abutment block.
[0011] Furthermore, filter membranes are fitted onto both ends of the inner tube.
[0012] Furthermore, a sealing ring is provided inside the insertion slot.
[0013] Furthermore, the sealing ring is provided with a concave curved surface on the side facing the insertion slot port.
[0014] Furthermore, the connector body has an annular cavity inside its wall, a spiral electric heating tube is installed inside the cavity, and the connector body is covered with heat insulation material.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] (1) This utility model has insertion slots at both ends of the connector body for inserting gas pipes, gas inlets of testing equipment, etc. Compared with the single-tube structure of existing conventional sealing connectors, gas is transported from the inner ventilation channel, which will not cause significant impact on the contact surface of the two, and the connection sealing performance is better. In addition, this utility model has clamping hoops at both ends of the connector body, and the clamping hoops have cross-arranged first and second raised edges, and an adjustment component is provided between the first and second raised edges. During installation, the clamping hoops are initially tightened to meet the sealing requirements of the sealing connector. During the use of the denitrification CEMS flue gas sampling system, if the sealing effect decreases, the clamping hoops can be further tightened by pushing the first or second raised edge through the adjustment component to restore the sealing effect. Therefore, compared with the existing sealing connectors of denitrification CEMS flue gas sampling systems, this utility model can guarantee the sealing performance of the sealing connector for a longer period of time.
[0017] (2) By setting a filter membrane at the port inside the insertion groove of the connector body, the present invention can intercept particulate matter in the denitrification CEMS flue gas outside the air passage, thereby alleviating the blockage problem of the sealed connector.
[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of the end face of the present invention;
[0021] Figure 3 This is a vertical center plane cross-sectional view of the present invention in Embodiment 1;
[0022] Figure 4 This is a vertical center plane cross-sectional view of the present invention in Embodiment 2;
[0023] Figure 5 This is a vertical center plane cross-sectional view of the present invention in Embodiment 3.
[0024] Reference numerals: 1. Connector body; 11. Inner tube; 12. Vent duct; 13. Insertion groove; 14. Outer tube; 15. Receiving cavity; 2. Clamping clamp; 21. First raised edge; 22. Second raised edge; 23. Fixing block; 24. Screw; 25. Abutting block; 26. Knob; 3. Filter membrane; 4. Spiral electric heating tube; 5. Sealing ring. Detailed Implementation
[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.
[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0028] Example 1: Please refer to the appendix for details. Figure 1 -Appendix Figure 3 A sealing connector for a denitrification CEMS flue gas sampling system, comprising:
[0029] The connector body 1 is a tubular structure with an "I"-shaped cross-section, including an inner tube 11, an outer tube 14, and a connecting part between the two. Neither end of the connecting part extends to the ends of the inner tube 11 or the outer tube 14, so that an annular insertion groove 13 is formed at each end of the connecting part between the inner tube 11 and the outer tube 14, which can be inserted into the gas supply pipe, the air inlet of the testing equipment, etc. The inner side of the inner tube 11 serves as a ventilation channel 12 for conveying denitrification CEMS flue gas.
[0030] A clamping hoop 2 is fitted onto both ends of the connector body 1. The two ends of the clamping hoop 2 are a first raised edge 21 and a second raised edge 22, which are arranged intersectingly. A strip-shaped notch is opened in the middle of the width direction of the side where the first raised edge 21 is located, and the strip-shaped notch extends along its length direction. The width of the side where the second raised edge 22 is located is smaller than the width of the first raised edge 21, and the second raised edge 22 passes through the strip-shaped notch on the first raised edge 21. The first raised edge 21 and the second raised edge 22 have different orientations, and both the first raised edge 21 and the second raised edge 22 are inclined or arc-shaped. A fixing block 23 is fixed to the end of the first raised edge 21. A screw 24 is provided through the fixing block 23 and is threadedly connected to the fixing block 23. The head end of the screw 24 faces the connector body 1 and is rotatably connected to an abutment block 25 that abuts against the second raised edge 22. A knob 26 is fixed to the end of the screw 24 that faces away from the abutment block 25.
[0031] The filter membrane 3 is fitted onto both sides of the inner tube 11 and is used to intercept particulate matter in the denitrification CEMS flue gas.
[0032] In application, insert the gas supply pipe, the air inlet of the testing equipment, etc., into the insertion slot 13, and then tighten the knob 26. This moves the screw 24 closer to the joint body 1, causing the contact block 25 to move accordingly. The contact block 25 abuts against and pushes the second raised edge 22. Under the action of the inclined or arc-shaped surface, the second raised edge 22 moves away from the first raised edge 21, achieving the purpose of tightening the clamp 2. This allows the inner tube body 11, outer tube body 14 to fit tightly with the gas supply pipe, the air inlet of the testing equipment, etc., thus completing the installation of the sealing joint. In subsequent applications, even if the sealing effect between the joint body 1 and the gas supply pipe, the air inlet of the testing equipment, etc. decreases, by further tightening the knob 26, the contact block 25 can be further pushed against the second raised edge 22, restoring the sealing effect between the joint body 1 and the gas supply pipe, the air inlet of the testing equipment, etc. Thus, the sealing joint of this utility model can maintain good sealing performance during use in the denitrification CEMS flue gas sampling system. Furthermore, the filter membrane 3 can intercept particulate matter in the flue gas from the denitrification CEMS, thereby alleviating the clogging problem of the sealing joint.
[0033] Example 2: The difference between this example and Example 1 is that:
[0034] In this embodiment, please refer to the appendix for details. Figure 4 A sealing ring 5 is provided inside the insertion groove 13, and the side of the sealing ring 5 facing the port of the insertion groove 13 is set as a concave curved surface. The sealing ring 5 can further ensure the sealing performance of the sealing joint.
[0035] Everything else is the same as in Example 1.
[0036] Example 3: The difference between this example and Example 2 is that:
[0037] In this embodiment, please refer to the appendix for details. Figure 5 The connector body 1 has an annular cavity 15 on its connecting part. A spiral electric heating tube 4 is housed within the cavity 15, and a temperature control device is installed. Related connecting parts can pass through the outer tube 14, which is covered with heat-insulating material. The connector body 1 is made of heat-resistant material (e.g., fluororubber, perfluoroether rubber, etc.). In application, the temperature of the spiral electric heating tube 4 can be controlled above the acid dew point (typically ≥180℃). This heats the inner tube 11, preventing the crystallization and deposition of ammonium salts in the low-temperature zone, thus helping to prevent blockage of the sealing joint. Simultaneously, when the flue gas humidity is high, it prevents moisture from condensing at the joint and combining with dust to form mud-like scale, further preventing blockage of the sealing joint.
[0038] Everything else is the same as in Example 2.
[0039] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.
Claims
1. A sealing joint for a denitrification CEMS flue gas sampling system, characterized in that: The device includes a connector body (1), both ends of which are provided with annular insertion grooves (13). Both ends of the connector body (1) are fitted with clamping hoops (2). The clamping hoops (2) are respectively formed with a first raised edge (21) and a second raised edge (22) at their two ends, and the first raised edge (21) and the second raised edge (22) are arranged in a cross pattern. An adjustment component is provided between the first raised edge (21) and the second raised edge (22) to push the first raised edge (21) or the second raised edge (22) to tighten the clamping hoops (2). The connector body (1) is provided with a filter membrane (3) for intercepting particulate matter in the denitrification CEMS flue gas at the port located inside the insertion groove (13).
2. The sealing joint of the denitrification CEMS flue gas sampling system according to claim 1, characterized in that: The connector body (1) includes an inner tube (11), an outer tube (14) and a connecting part between the two, wherein an insertion groove (13) is formed at each end of the connecting part between the inner tube (11) and the outer tube (14).
3. The sealing joint of the denitrification CEMS flue gas sampling system according to claim 1, characterized in that: The first raised edge (21) and the second raised edge (22) are both inclined or arc-shaped.
4. The sealing joint of the denitrification CEMS flue gas sampling system according to claim 1, characterized in that: A strip-shaped notch is provided on the side where the first curved edge (21) is located, and the second curved edge (22) passes through the strip-shaped notch on the first curved edge (21).
5. A sealing joint for a denitrification CEMS flue gas sampling system according to claim 1, characterized in that: The adjustment assembly includes a fixing block (23) fixedly connected to the first warp edge (21) or the second warp edge (22). A screw (24) is provided through the fixing block (23), and the screw (24) is threadedly connected to the fixing block (23). A contact block (25) is rotatably connected to the head end of the screw (24), and a knob (26) is fixed to the end of the screw (24) facing away from the contact block (25).
6. A sealing joint for a denitrification CEMS flue gas sampling system according to claim 2, characterized in that: Filter membranes (3) are fitted on both sides of the inner tube (11).
7. A sealing joint for a denitrification CEMS flue gas sampling system according to claim 1, characterized in that: A sealing ring (5) is provided inside the insertion slot (13).
8. A sealing joint for a denitrification CEMS flue gas sampling system according to claim 7, characterized in that: The sealing ring (5) is set with a concave curved surface on the side facing the port of the insertion groove (13).
9. A sealing joint for a denitrification CEMS flue gas sampling system according to claim 1, characterized in that: The connector body (1) has an annular cavity (15) inside its wall, and a spiral electric heating tube (4) is provided inside the cavity (15). The connector body (1) is covered with heat insulation material.