Inlet adjusting device for flue gas catalytic denitration

Abstract

The utility model relates to flue gas purification adjusting device technical field, specifically is a kind of flue gas catalytic denitration with entry regulating device, including installation pipe, valve plate is rotatably connected on installation pipe, filter structure is equipped on installation pipe, filter structure includes installation frame, installation frame is detachably connected on installation pipe, filter screen is fixedly connected on installation frame, two guide frames are fixedly connected on installation pipe, guide block is slidably connected on guide frame, fixed link is slidably connected between two guide blocks, slope is equipped on fixed link, spring is fixedly connected between fixed link and guide block, one installation frame is rotatably connected with screw rod, one guide block is threadedly connected with screw rod. Dust particles in flue gas can be intercepted by filter screen, avoid dust accumulation to influence the close contact of valve plate and semicircular sealing strip, guarantee sealing effect, reduce the strength of dust scouring valve plate at the same time, prolong the service life of valve plate.

Description

Technical Field

[0001] This utility model relates to a regulating device, specifically an inlet regulating device for flue gas catalytic denitrification, belonging to the technical field of flue gas purification regulating devices. Background Technology

[0002] Flue gas catalytic denitrification is an industrial method for controlling NO. x The key technology for emission reduction lies in the use of vanadium-titanium catalysts at 280-420℃ to allow NO to be reduced. x It reacts with reducing agents such as ammonia and urea pyrolysis gas to produce harmless N2 and H2O. The stability of the flue gas parameters (flow rate, temperature, reducing agent concentration, dust content) at the inlet of the denitrification reactor directly affects the catalytic efficiency and catalyst life. For example, uneven flow rate can lead to catalyst wear or incomplete reaction. Therefore, an inlet regulating device is required. The device consists of a flow guiding component (to homogenize the flow rate) and a flow control component (to regulate the total flow rate, with an electric damper as the core) to ensure stable operation of the system under different operating conditions.

[0003] However, the valve plate, the core component of existing electric dampers, will wear out faster due to the high-speed impact of fly ash and other particles in long-term high-temperature and high-dust flue gas environments. In particular, the edges and sealing surfaces are prone to damage, which shortens the service life and damages the sealing performance. At the same time, some dust will adhere to the surface of the valve plate and the gap between the valve plate and the frame and accumulate. On the one hand, it will hinder the flexible rotation of the valve plate and reduce the accuracy of flow regulation. On the other hand, it will further expand the sealing gap. Utility Model Content

[0004] The purpose of this invention is to provide an inlet regulating device for flue gas catalytic denitrification in order to solve the above problems. The filter screen can intercept dust particles in the flue gas, reduce the direct adhesion of dust to the valve plate surface, avoid dust accumulation affecting the tight contact between the valve plate and the semi-circular sealing strip, ensure the sealing effect, and at the same time reduce the intensity of dust scouring the valve plate at high speed, thus extending the service life of the valve plate.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an inlet regulating device for flue gas catalytic denitrification, comprising an installation pipe, a valve plate rotatably connected to the installation pipe, a filter structure provided on the installation pipe, the filter structure including an installation frame, an installation frame detachably connected to the installation pipe, a filter screen fixedly connected to the installation frame, two guide frames fixedly connected to the installation pipe, guide blocks slidably connected to the guide frames, a fixed rod slidably connected between the two guide blocks, an inclined surface provided on the fixed rod, a spring fixedly connected between the fixed rod and the guide blocks, a lead screw rotatably connected to one of the installation frames, and a threaded connection between one of the guide blocks and the lead screw.

[0006] Preferably, a guide shaft is fixedly connected to another guide frame, another guide block is slidably connected to the guide shaft, and a rotating block is fixedly connected to the lead screw.

[0007] Preferably, a sealing ring is fixedly connected to the mounting frame, and the sealing ring abuts against the mounting tube.

[0008] Preferably, the fixing rod is fixed by a blocking structure, the blocking structure including a fixing shaft.

[0009] Preferably, a fixed shaft is fixedly connected to the fixed rod, and a baffle is rotatably connected to the fixed shaft.

[0010] Preferably, a fixing block is fixedly connected to the mounting pipe, and the fixing block is provided with a fixing groove.

[0011] Preferably, two semi-circular sealing strips are fixedly connected to the mounting pipe, and the valve plate abuts against the two sealing strips.

[0012] Preferably, the valve plate is driven by a drive structure, the drive structure including a drive shaft, the drive shaft being fixedly connected to the valve plate, and the drive shaft being rotatably connected to the mounting tube.

[0013] Preferably, a mounting box is fixedly connected to the mounting tube, the drive shaft is rotatably connected to the mounting box, a worm gear is fixedly connected to the drive shaft, and a worm is meshed on the worm gear.

[0014] Preferably, the worm gear is rotatably connected to the mounting box, and a driving component is mounted on the mounting box, through which the worm gear is driven.

[0015] The beneficial effects of this utility model are as follows: a valve plate is rotatably connected to the mounting tube, a filter structure is provided on the mounting tube, a mounting frame is detachably connected to the mounting tube, a filter screen is fixedly connected to the mounting frame, two guide frames are fixedly connected to the mounting tube, guide blocks are slidably connected to the guide frames, a fixed rod is slidably connected between the two guide blocks, the fixed rod is provided with an inclined surface, a spring is fixedly connected between the fixed rod and the guide blocks, a lead screw is rotatably connected to one of the mounting frames, and one of the guide blocks is threadedly connected to the lead screw. The filter screen can intercept dust particles in the flue gas, reduce the direct adhesion of dust to the surface of the valve plate, avoid dust accumulation affecting the tight contact between the valve plate and the semi-circular sealing strip, ensure the sealing effect, and at the same time reduce the intensity of high-speed dust erosion of the valve plate, extending the service life of the valve plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 3 This is a schematic diagram of the connection structure between the lead screw and the guide frame of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure between the mounting frame and the mounting tube of this utility model.

[0020] In the diagram: 1. Mounting pipe; 2. Filter structure; 201. Mounting frame; 202. Filter screen; 203. Sealing ring; 204. Guide frame; 205. Guide block; 206. Fixing rod; 207. Inclined surface; 208. Spring; 209. Guide shaft; 210. Lead screw; 3. Blocking structure; 301. Fixing shaft; 302. Baffle; 303. Fixing block; 304. Fixing groove; 4. Drive structure; 401. Drive shaft; 402. Mounting box; 403. Worm gear; 404. Worm; 405. Drive component; 5. Sealing strip; 6. Valve plate. 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] Please see Figures 1-4 As shown, an inlet regulating device for flue gas catalytic denitrification includes an installation pipe 1, a valve plate 6 rotatably connected to the installation pipe 1, a filter structure 2 provided on the installation pipe 1, the filter structure 2 including an installation frame 201, the installation frame 201 detachably connected to the installation pipe 1, a filter screen 202 fixedly connected to the installation frame 201, two guide frames 204 fixedly connected to the installation pipe 1, guide blocks 205 slidably connected to the guide frames 204, a fixing rod 206 slidably connected between the two guide blocks 205, an inclined surface 207 provided on the fixing rod 206, a spring 208 fixedly connected between the fixing rod 206 and the guide blocks 205, a lead screw 210 rotatably connected to one of the installation frames 201, and one of the guide blocks 205 threadedly connected to the lead screw 210.

[0023] As a technical optimization of this utility model, a guide shaft 209 is fixedly connected to another guide frame 204, and another guide block 205 is slidably connected to the guide shaft 209. A rotating block is fixedly connected to the lead screw 210. First, the mounting frame 201 is aligned with the installation position of the mounting tube 1 and pushed in. During the process, the edge of the mounting frame 201 abuts against the inclined surface 207 of the fixing rod 206, forcing the fixing rod 206 to slide along the guide block 205 to both sides and compress the spring 208. When the mounting frame 201 slides to the point where the sealing ring 203 is in close contact with the mounting tube 1, the setting of the sealing ring 203 ensures that the flue gas will not leak from the installation gap, improving the sealing performance of the device. At this time, the fixing rod 206 slides in the opposite direction under the action of the spring 208's restoring force. When it slides to a certain position, it is aligned with the mounting tube 1. The frame 201 is used for blocking and limiting. Rotating the screw 210 drives one side guide block 205 to slide along the guide frame 204, and the other side guide block 205 slides synchronously along the guide shaft 209, ensuring that the fixed rod 206 moves smoothly and abuts against the mounting frame 201, thereby making the sealing ring 203 abut against the mounting tube 1 more tightly, further improving the sealing effect. During use, the filter screen 202 can intercept dust particles in the flue gas, reduce dust directly adhering to the surface of the valve plate 6, avoid dust accumulation affecting the tight contact between the valve plate 6 and the semi-circular sealing strip 5, ensure the sealing effect, and at the same time reduce the intensity of dust scouring the valve plate 6 at high speed, extending the service life of the valve plate 6. The sealing ring 203 is fixedly connected to the mounting frame 201, and the sealing ring 203 abuts against the mounting tube 1.

[0024] As a technical optimization of this utility model, the fixing rod 206 is fixed by the blocking structure 3. The blocking structure 3 includes a fixing shaft 301. The fixing shaft 301 is fixedly connected to the fixing rod 206. A baffle 302 is rotatably connected to the fixing shaft 301. A fixing block 303 is fixedly connected to the mounting tube 1. By pulling the baffle 302, the fixing rod 206 no longer blocks and limits the mounting frame 201. Then, the baffle 302 is rotated so that it rotates around the fixing shaft 301 and is embedded in the fixing groove 304 of the fixing block 303, further locking the position of the fixing rod 206 and preventing the fixing rod 206 from sliding during disassembly. The fixing block 303 is provided with a fixing groove 304. Two semi-circular sealing strips 5 are fixedly connected to the mounting tube 1. The valve plate 6 abuts against the two sealing strips 5.

[0025] As a technical optimization of this utility model, the valve plate 6 is driven by the drive structure 4, which includes a drive shaft 401. The drive shaft 401 is fixedly connected to the valve plate 6 and rotatably connected to the mounting tube 1. The mounting tube 1 is fixedly connected to the mounting box 402. When the valve plate 6 is adjusted, the drive component 405 (preferably a motor) is activated. The drive component 405 drives the worm gear 404 to rotate. Through the meshing transmission between the worm wheel 403 and the worm gear 404, a self-locking function is provided to prevent the valve plate 6 from rotating on its own due to flue gas pressure, thus ensuring adjustment accuracy. The drive shaft 401 is driven to rotate, so that the valve plate 6 is tightly fitted with the two semi-circular sealing strips 5. Alternatively, the flue gas flow can be adjusted by separating the flue gas. After being adjusted by the inlet regulating device (stabilizing the flow rate and filtering dust), the flue gas will enter the denitrification reactor. Under the action of a specific temperature and a catalyst (such as a vanadium-titanium catalyst), it will undergo a selective reduction reaction with a reducing agent (such as ammonia) to convert nitrogen oxides into harmless nitrogen and water, thus completing catalytic denitrification. The drive shaft 401 is rotatably connected to the mounting box 402. A worm gear 403 is fixedly connected to the drive shaft 401. A worm 404 is meshed on the worm gear 403. The worm 404 is rotatably connected to the mounting box 402. A drive component 405 is installed on the mounting box 402. The worm 404 is driven by the drive component 405.

[0026] In use, the mounting frame 201 is first aligned with the mounting position of the mounting tube 1 and pushed in. During this process, the edge of the mounting frame 201 abuts against the inclined surface 207 of the fixing rod 206, forcing the fixing rod 206 to slide along the guide block 205 to both sides and compress the spring 208. When the mounting frame 201 slides until the sealing ring 203 is in tight contact with the mounting tube 1, the sealing ring 203 ensures that flue gas will not leak from the installation gap, improving the sealing performance of the device. At this time, the fixing rod 206 slides in the opposite direction under the restoring force of the spring 208. When it slides to a certain position, it abuts the mounting frame 201. By engaging the limiting mechanism and rotating the lead screw 210, one guide block 205 slides along the guide frame 204, while the other guide block 205 slides synchronously along the guide shaft 209. This ensures the smooth movement of the fixed rod 206, causing it to contact the mounting frame 201. This results in a tighter contact between the sealing ring 203 and the mounting tube 1, further improving the sealing effect. During use, the filter screen 202 intercepts dust particles in the flue gas, reducing direct dust adhesion to the valve plate 6 surface. This prevents dust accumulation from affecting the tight contact between the valve plate 6 and the semi-circular sealing strip 5, ensuring a good sealing effect and reducing dust accumulation. The high-speed scouring of dust reduces the strength of the valve plate 6, extending its service life. When cleaning or replacing the filter screen 202 is required, pulling the baffle 302 causes the fixing rod 206 to no longer block the mounting frame 201. Then, rotating the baffle 302 causes it to rotate around the fixing shaft 301 and embed into the fixing groove 304 of the fixing block 303, further locking the position of the fixing rod 206 and preventing it from sliding during disassembly. When adjusting the valve plate 6, the drive component 405 (preferably a motor) is activated. The drive component 405 drives the worm gear 404 to rotate, thereby adjusting the worm gear 404. The meshing transmission between wheel 403 and worm gear 404 has a self-locking function, preventing valve plate 6 from rotating on its own due to flue gas pressure, ensuring adjustment accuracy, and driving drive shaft 401 to rotate, so that valve plate 6 is tightly fitted or separated from the two semi-circular sealing strips 5, realizing flue gas flow regulation. The flue gas regulated by this inlet regulating device (stabilizing the flow rate and filtering dust) will enter the denitrification reactor. Under the action of a specific temperature and catalyst (such as vanadium-titanium catalyst), it will undergo a selective reduction reaction with reducing agent (such as ammonia) to convert nitrogen oxides into harmless nitrogen and water, thus completing catalytic denitrification.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An inlet regulating device for flue gas catalytic denitrification, comprising an installation pipe (1), wherein a valve plate (6) is rotatably connected to the installation pipe (1), characterized in that: The mounting tube (1) is provided with a filter structure (2), the filter structure (2) includes a mounting frame (201), the mounting tube (1) is detachably connected to the mounting frame (201), the mounting frame (201) is fixedly connected to the mounting frame (201), two guide frames (204) are fixedly connected to the mounting tube (1), guide blocks (205) are slidably connected to the guide frames (204), a fixing rod (206) is slidably connected between the two guide blocks (205), the fixing rod (206) is provided with an inclined surface (207), a spring (208) is fixedly connected between the fixing rod (206) and the guide block (205), a lead screw (210) is rotatably connected to one of the mounting frames (201), and one of the guide blocks (205) is threadedly connected to the lead screw (210).

2. The inlet regulating device for flue gas catalytic denitrification according to claim 1, characterized in that: Another guide frame (204) is fixedly connected to a guide shaft (209), another guide block (205) is slidably connected to the guide shaft (209), and a rotating block is fixedly connected to the lead screw (210).

3. The inlet regulating device for flue gas catalytic denitrification according to claim 2, characterized in that: A sealing ring (203) is fixedly connected to the mounting frame (201), and the sealing ring (203) abuts against the mounting tube (1).

4. The inlet regulating device for flue gas catalytic denitrification according to claim 1, characterized in that: The fixing rod (206) is fixed by a stop structure (3), which includes a fixing shaft (301).

5. The inlet regulating device for flue gas catalytic denitrification according to claim 4, characterized in that: A fixed shaft (301) is fixedly connected to the fixed rod (206), and a baffle (302) is rotatably connected to the fixed shaft (301).

6. The inlet regulating device for flue gas catalytic denitrification according to claim 5, characterized in that: A fixing block (303) is fixedly connected to the mounting pipe (1), and a fixing groove (304) is provided on the fixing block (303).

7. The inlet regulating device for flue gas catalytic denitrification according to claim 6, characterized in that: Two semi-circular sealing strips (5) are fixedly connected to the mounting pipe (1), and the valve plate (6) abuts against the two sealing strips (5).

8. The inlet regulating device for flue gas catalytic denitrification according to claim 1, characterized in that: The valve plate (6) is driven by a drive structure (4), which includes a drive shaft (401). The drive shaft (401) is fixedly connected to the valve plate (6), and the drive shaft (401) is rotatably connected to the mounting tube (1).

9. The inlet regulating device for flue gas catalytic denitrification according to claim 8, characterized in that: An installation box (402) is fixedly connected to the installation tube (1), and the drive shaft (401) is rotatably connected to the installation box (402). A worm gear (403) is fixedly connected to the drive shaft (401), and a worm (404) meshes with the worm gear (403).

10. The inlet regulating device for flue gas catalytic denitrification according to claim 9, characterized in that: The worm gear (404) is rotatably connected to the mounting box (402), and a driving component (405) is mounted on the mounting box (402). The worm gear (404) is driven by the driving component (405).

Images