A high-temperature in-furnace tube bundle surface decoking device

Abstract

The utility model discloses a kind of high-temperature tube bundle surface decoking devices in furnace, including supporting mechanism, climbing mechanism and knock ash mechanism, the supporting mechanism includes metal pipe, and the metal pipe bottom end solid connection of tightening cover, climbing mechanism, the climbing mechanism includes four plate frames movably arranged in the inside of metal pipe, four springs solidly connected in the outside of plate frame, and the rod cover connected between the inner wall of metal pipe and the outer end of spring.Suit the high-temperature tube bundle outside after metal pipe cover, spring extrusion frame makes pushing wheel tightly high-temperature tube bundle wall surface, then start motor, make pushing wheel eye high-temperature tube bundle wall surface steady climb, during, pushing wheel every rotation a week, its convex part will lift transmission rod, then stretch after pulling spring, make transmission rod bottom end's cone hit high-temperature tube bundle, so that coke block falls off, replace traditional steam soot blowing by mechanical knocking mode, can effectively improve coke block clean rate.

Description

Technical Field

[0001] This utility model relates to the technical field of decoking devices, specifically a decoking device for the surface of high-temperature tube bundles inside a furnace. Background Technology

[0002] The flue gas produced during biomass combustion contains a large amount of fine ash. Due to the high alkali metal content in agricultural and forestry biomass fuels, the ash melting point of the dust in the flue gas is lowered, making the dust "soft and sticky". It is very easy for the dust to adhere to the surface of the superheater tube bundle and form coke when passing through the high-temperature section of the superheater in the boiler.

[0003] To address this issue, the industry commonly uses steam soot blowing devices to remove coke buildup on the tube bundle surface, but this method has proven ineffective in practice. The main reason is that a single steam soot blowing cycle lasts approximately 5 minutes, which is too short to effectively remove surface ash and does not address the coke deposits adhering to the tube bundle surface. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A furnace high-temperature tube bundle surface decoking device includes a support mechanism, a climbing mechanism, and a ash-knocking mechanism. The support mechanism includes a metal tube and a tightening sleeve fixedly connected to the bottom end of the metal tube. The climbing mechanism includes four plates movably disposed inside the metal tube, four springs fixedly connected to the outside of the plates, a rod sleeve connected between the inner wall of the metal tube and the outer end of the springs, a drive wheel rotatably passing through the inner side of the plates, and a motor fixedly connected between the plates and the drive wheel. The ash-knocking mechanism includes a transmission rod fitted to the outside of the drive wheel and rotatably connected to the plates, two cones fixedly connected to the bottom end of the transmission rod, and a tension spring disposed at the top of the drive wheel and connected between the plates and the transmission rod.

[0007] By adopting the above technical solution, after the metal tube is sleeved on the outside of the high-temperature tube bundle, the spring squeezes the plate frame to make the push wheel stick tightly to the wall of the high-temperature tube bundle. Then the motor is started, so that the push wheel eye climbs steadily on the wall of the high-temperature tube bundle. During this process, every time the push wheel rotates, its protruding part will push up the transmission rod. Then the tension spring is stretched and quickly contracted, so that the cone at the bottom of the transmission rod hits the high-temperature tube bundle, thereby causing the coke to fall off. By replacing the traditional steam blowing with mechanical knocking, the coke removal rate can be effectively improved.

[0008] In a preferred embodiment, this utility model can be further configured as four plate frames arranged at equal intervals in a ring. Each plate frame consists of a rectangular plate and four short shafts, which are fixedly connected to the outer wall of the rectangular plate in a matrix.

[0009] In a preferred embodiment, the present invention can be further configured such that: the sleeve is slidably sleeved on the outside of the short shaft, and the spring is movably disposed inside the sleeve.

[0010] In a preferred embodiment, the present invention can be further configured such that: the push wheel is composed of a cam and two magnetic disks, the cam is fixed between the two magnetic disks, and the inner side of the transmission rod is in contact with the outer wall of the cam.

[0011] In a preferred embodiment, this invention can be further configured such that multiple motors are connected in series and electrically connected to an external power supply.

[0012] In a preferred embodiment, the present invention can be further configured such that: both sides of the tightening sleeve are fixedly connected to ash discharge pipes communicating with the inside of the tightening sleeve, and the ash discharge pipes are inclined.

[0013] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0014] 1. In this utility model, after the metal tube is sleeved on the outside of the high-temperature tube bundle, the spring squeezes the plate frame to make the push wheel stick tightly to the wall of the high-temperature tube bundle. Then the motor is started to make the push wheel steadily climb the wall of the high-temperature tube bundle. During this process, every time the push wheel rotates once, its protruding part will push up the transmission rod. Then the tension spring is stretched and quickly contracted, so that the cone at the bottom of the transmission rod hits the high-temperature tube bundle, thereby causing the coke to fall off. By replacing the traditional steam blowing with mechanical knocking, the coke removal rate can be effectively improved.

[0015] 2. In this utility model, the coke blocks knocked down by the cone fall vertically downwards, are then collected by the tightening sleeve, and are then discharged by the ash discharge pipe, so that the weight of the metal pipe does not increase during the climbing process, ensuring that it can climb stably and that the coke removal operation can be carried out stably. Attached Figure Description

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

[0017] Figure 2 This is a perspective view of the support mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the metal tube of this utility model;

[0019] Figure 4 This is an exploded view of the climbing mechanism and the ash-knocking mechanism of this utility model;

[0020] Figure 5 This is a perspective view of the drive wheel of this utility model.

[0021] Figure label:

[0022] 100. Support mechanism; 110. Metal tube; 120. Tightening sleeve;

[0023] 200. Climbing mechanism; 210. Plate frame; 220. Spring; 230. Rod sleeve; 240. Drive wheel; 241. Cam; 242. Magnetic disk; 250. Motor;

[0024] 300. Ash knocking mechanism; 310. Transmission rod; 320. Cone; 330. Tension spring;

[0025] 500. Ash discharge pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0028] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, a coke removal device for the surface of high-temperature tube bundles in a furnace.

[0029] Example 1:

[0030] Combination Figure 1-5 As shown, the present invention provides a furnace high-temperature tube bundle surface decoking device, including a support mechanism 100, a climbing mechanism 200 and a ash knocking mechanism 300. The support mechanism 100 includes a metal tube 110 and a tightening sleeve 120 fixedly connected to the bottom end of the metal tube 110.

[0031] The climbing mechanism 200 includes four plate frames 210 movably disposed inside the metal tube 110, four springs 220 fixed to the outside of the plate frames 210, a rod sleeve 230 connected between the inner wall of the metal tube 110 and the outer end of the springs 220, a push wheel 240 rotatably passing through the inner side of the plate frames 210, and a motor 250 fixed between the plate frames 210 and the push wheel 240.

[0032] The knocking mechanism 300 includes a transmission rod 310 that fits against the outside of the push wheel 240 and is rotatably connected to the plate frame 210, two cones 320 that are fixed to the bottom end of the transmission rod 310, and a tension spring 330 that is disposed on the top of the push wheel 240 and connected between the plate frame 210 and the transmission rod 310.

[0033] Furthermore, the four plate frames 210 are equally spaced and arranged in a ring. Each plate frame 210 consists of a rectangular plate and four short shafts. The four short shafts are fixed to the outer wall of the rectangular plate in a matrix. This layout design allows the multiple plate frames 210 to work together to clamp the high-temperature tube bundle and effectively prevent the metal tube 110 from falling off during the coke removal operation.

[0034] Furthermore, the sleeve 230 is slidably sleeved on the outside of the short shaft, and the spring 220 is movably disposed inside the sleeve 230. This structural design ensures that the plate frame 210 can be smoothly pressed against the high-temperature tube bundle.

[0035] Furthermore, the push wheel 240 is composed of a cam 241 and two magnetic disks 242. The cam 241 is fixed between the two magnetic disks 242. The inner side of the transmission rod 310 is in contact with the outer wall of the cam 241. The structural design of the push wheel 240 allows the push wheel 240 to be in close contact with the high-temperature tube bundle, so that the metal tube 110 can climb stably.

[0036] Example 2:

[0037] Combination Figure 1-5 As shown, based on Embodiment 1, multiple motors 250 are connected in series and electrically connected to an external power supply. This structural design improves the user comfort of the device.

[0038] Example 3:

[0039] Combination Figure 1 As shown, in the above embodiment, both sides of the tightening sleeve 120 are fixedly connected to a ash discharge pipe 500 that communicates with the inside of the tightening sleeve 120. The ash discharge pipe 500 is inclined. The ash discharge pipe 500 can remove coke pieces that fall on the high-temperature tube bundle, so that the metal tube 110 can climb without obstruction.

[0040] Working principle and usage process of this utility model:

[0041] When this device is put into actual use, the metal tube 110 is first fitted onto the outside of the high-temperature tube bundle. Then, under the continuous compression of multiple springs 220, the plate frame 210 is tightly magnetically attracted to the surface of the high-temperature tube bundle through the push wheel 240 on it. After the external power supply is connected, multiple motors 250 start synchronously and drive the push wheel 240 to climb upward along the wall of the high-temperature tube bundle.

[0042] During this process, for each rotation of the drive wheel 240, the protruding part of the cam 241 on it will lift the entire transmission rod 310, causing the tension spring 330 to stretch accordingly. When the protruding part of the cam 241 separates from the transmission rod 310, the tension spring 330 will quickly contract, driving the cone 320 to strike the coke block on the outer wall of the high-temperature tube bundle, causing the coke block to fall off. This device replaces the traditional steam blowing with mechanical striking, which can effectively improve the coke block removal rate.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A coke removal device for the surface of high-temperature tube bundles inside a furnace, characterized in that, include: The support mechanism (100) includes a metal tube (110) and a tightening sleeve (120) fixedly connected to the bottom end of the metal tube (110); The climbing mechanism (200) includes four plate frames (210) movably disposed inside the metal tube (110), four springs (220) fixed to the outside of the plate frames (210), a rod sleeve (230) connected between the inner wall of the metal tube (110) and the outer end of the springs (220), a push wheel (240) rotatably passing through the inside of the plate frames (210), and a motor (250) fixed between the plate frames (210) and the push wheel (240). The knocking mechanism (300) includes a transmission rod (310) that fits against the outside of the push wheel (240) and is rotatably connected to the plate frame (210), two cones (320) that are fixed to the bottom end of the transmission rod (310), and a tension spring (330) that is disposed on the top of the push wheel (240) and connected between the plate frame (210) and the transmission rod (310).

2. The furnace high-temperature tube bundle surface decoking device according to claim 1, characterized in that, Four plate frames (210) are equally spaced and arranged in a ring. Each plate frame (210) consists of a rectangular plate and four short axes. The four short axes are fixed to the outer wall of the rectangular plate in a matrix.

3. The furnace high-temperature tube bundle surface decoking device according to claim 2, characterized in that, The sleeve (230) is slidably sleeved on the outside of the short shaft, and the spring (220) is movably disposed inside the sleeve (230).

4. The furnace high-temperature tube bundle surface decoking device according to claim 1, characterized in that, The drive wheel (240) is composed of a cam (241) and two magnetic disks (242). The cam (241) is fixed between the two magnetic disks (242), and the inner side of the transmission rod (310) is in contact with the outer wall of the cam (241).

5. The furnace high-temperature tube bundle surface decoking device according to claim 1, characterized in that, Multiple motors (250) are connected in series and electrically connected to an external power supply.

6. The furnace high-temperature tube bundle surface decoking device according to claim 1, characterized in that, Both sides of the tightening sleeve (120) are fixedly connected to ash discharge pipes (500) that communicate with the inside of the tightening sleeve (120), and the ash discharge pipes (500) are inclined.

Images