Device for quickly dismounting furnace hood of circulating fluidized bed boiler

Abstract

The utility model discloses a device for quickly dismounting a furnace hood of a circulating fluidized bed boiler in the technical field of boiler equipment installation, which comprises a hood, a plurality of vent holes are formed in the side wall of the hood, iron hooks are connected in the vent holes, iron chains are connected to the iron hooks, a top plate is connected to the top ends of the iron chains, and a jack is connected to the right lower part of the top plate. The jack is connected to the adjustable support, and the adjustable support is located on the periphery of the hood. Through mechanical linkage of the jack and the iron chain, a traditional manual knocking mode is replaced, the dismounting time is greatly shortened, the rapid dismounting effect is achieved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment installation technology, specifically to a device for quickly removing the furnace vent cap of a circulating fluidized bed boiler. Background Technology

[0002] The Zunyi Aluminum Power Plant's thermal system is equipped with two 180t / h medium-temperature, medium-pressure circulating fluidized bed boilers. The boiler combustion process is based on the principle of circulating fluidization, characterized by the circulating combustion of a large amount of high-temperature solid particulate material carrying the fuel. The solid particles fill the entire furnace, resulting in a suspended and strongly mixed combustion environment. Preheated primary fluidizing air is introduced through the air chamber from the bottom of the furnace, passing through the air distribution plate and air cap, causing the material in the furnace to be in a rapid fluidized state. The fuel burns in the inert bed material that fills the entire furnace.

[0003] Each boiler is equipped with 1200 bell-shaped air caps designed by Jinan Boiler Factory, evenly arranged on the air distribution plate. Each air cap consists of an air cap tube seat and a connecting sleeve that penetrates the air distribution plate. The primary air, preheated by the air preheater, is collected and pressurized in the air chamber and then enters the air cap through the air distribution pipe. After being evenly distributed through the exhaust holes of the air cap body, it fluidizes and mixes the bed material inside the furnace for combustion. The air cap is designed with an outer diameter of 100mm, an inner diameter of 50mm, and a height of 150mm. Eight bell-shaped air caps are evenly arranged 10mm from the bottom of the body. The ventilation holes and the hollow interior of the air caps have become increasingly problematic in recent years due to changes in boiler production and operation structure, large fluctuations in boiler load, and the variety of fuels. Each shutdown inspection reveals blockages in most air caps, requiring manual removal and unblocking of the ventilation holes. Currently, the removal method involves manually cleaning the accumulated material from the air distribution plate and then using a sledgehammer to loosen the air cap from the base sleeve by tapping it from side to side before removing the air cap and cleaning the ventilation holes. However, the air caps are difficult to remove after shutdown for two main reasons: First, the gap between the air cap and the tube seat is 2mm. During boiler operation at 880℃-950℃, some air caps and tube seats deform and carbonize, resulting in direct hard contact and immobility. Second, the furnace mainly consists of a mixture of bed material and coal combustion, producing a large amount of fine slag. During rapid load reduction, some of this slag enters the connection between the air cap and the tube seat, undergoing prolonged high-temperature burning, hardening and caking, causing the air cap and tube seat to solidify together. Manual disassembly and cleaning under the above circumstances greatly increases workshop operating costs, and the cleaning work is time-consuming, seriously affecting the boiler maintenance and standby cycle. Utility Model Content

[0004] The present invention aims to provide a device for quickly removing the furnace vent cap of a circulating fluidized bed boiler, so as to solve the problem that the existing vent caps are difficult to remove and clean due to deformation caused by long-term use.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a device for quickly removing the furnace vent cap of a circulating fluidized bed boiler, including a vent cap, with multiple ventilation holes on the side wall of the vent cap, iron hooks connected to the ventilation holes, iron chains connected to the iron hooks, a top plate connected to the top of the multiple iron chains, a jack connected directly below the top plate, and the jack connected to an adjustable bracket located around the vent cap.

[0006] The working principle of this utility model is as follows: Place the adjustable bracket around the vent cap that needs to be disassembled, keeping the vent cap at the center of the adjustable bracket platform. Place the jack on top of the adjustable bracket and the top plate on top of the jack. Connect the multiple iron hooks to the ventilation holes one by one. Then start the jack. The telescopic end of the jack pushes upward, causing the top plate to move upward. At this time, the iron hooks drive the vent cap upward until the vent cap is detached from the tube seat. Stop the jack to complete the disassembly of the vent cap.

[0007] The beneficial effects of this utility model are as follows: 1. By using the mechanical linkage of the jack and the iron chain, the traditional manual hammering method is replaced, significantly shortening the disassembly time (from several hours to tens of minutes), achieving rapid disassembly and reducing the labor intensity of workers. 2. The adjustable bracket can be flexibly adjusted according to the height of the vent cap, suitable for disassembling vent caps of different boiler models, avoiding disassembly difficulties caused by vent cap deformation or material caking. 3. The iron hook is directly connected to the ventilation hole, ensuring even force distribution during the lifting process, reducing mechanical damage to the vent cap and pipe seat, and extending the service life of the equipment. 4. The connection between the iron hook and the through hole indirectly clears the blockage problem of the ventilation hole. 5. This device has a simple and stable structure, requires no high-temperature operation, and reduces safety risks during maintenance.

[0008] Furthermore, the diameter of the iron hook is the same as the diameter of the ventilation hole. This hook diameter ensures a secure connection between the hook and the vent cap, preventing it from falling off during lifting; the close-fitting design reduces wear on the ventilation hole.

[0009] Furthermore, the adjustable support includes a platform and multiple supports, each with multiple screw holes. Multiple hinges are connected to the bottom edges of the platform, and these hinges connect to the horizontal screw holes. The detachable design of the platform and supports allows for quick adjustment of the support height to accommodate wind caps of different heights; it also enables flexible installation in narrow spaces within the furnace, enhancing the device's versatility.

[0010] Furthermore, the bottom end of the top plate is provided with a circular groove, the diameter of which is the same as that of the telescopic end of the jack. This groove's fit snugly against the telescopic end of the jack ensures that the jack's thrust is evenly transmitted to the top plate, preventing the top plate from tilting.

[0011] Furthermore, the iron chain is vertically connected to the top plate. Vertical force prevents the wind cap from tilting and avoids jamming with the pipe seat.

[0012] Furthermore, all the aforementioned chains are of the same length. This ensures that all parts of the hood are lifted synchronously and the force is evenly distributed, while also preventing the hood from twisting or being damaged due to differences in chain length. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to the present invention;

[0014] Figure 2 for Figure 1 Schematic diagram of the structure of the iron hook;

[0015] Figure 3 for Figure 1 A bottom view of the top slab. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method:

[0017] The reference numerals in the accompanying drawings of the instruction manual include: jack 1, top plate 2, circular groove 201, iron chain 3, platform 4, bracket 5, wind cap 6, iron hook 7, and pipe seat 8.

[0018] The basic implementation examples are as follows: Figure 1 -Appendix Figure 3 As shown: A device for quickly removing the furnace vent cap of a circulating fluidized bed boiler includes a vent cap 6, an adjustable bracket 5, and four iron hooks 7. The vent cap 6 is slidably connected to a tube base 8. Four ventilation holes are provided on the side wall of the vent cap 6. The four iron hooks 7 are slidably connected to the four ventilation holes one by one. The other end of the iron hooks 7 is fixedly connected to an iron chain 3. The four iron chains 3 are vertically fixedly connected to a top plate 2. The four iron chains 3 are located at the outer edge of the top plate 2. The four iron chains 3 are of the same length. A circular groove 201 is provided at the bottom end of the top plate 2. The top plate 2 is directly below... The sliding connection includes a jack 1, which is an ultra-thin jack model RSM-100 manufactured by Witel. The diameter of the circular groove 201 is the same as the diameter of the telescopic end of the jack 1. The telescopic end of the jack 1 is slidably connected to the circular groove 201. The adjustable bracket 5 includes a platform 4 and four brackets 5. Each bracket 5 is provided with screw holes. Four hinges are fixedly vertically connected to the bottom of the platform 4. The four hinges are fixedly connected to the four horizontal screw holes with bolts. The jack 1 is placed in the center of the platform 4.

[0019] The specific implementation process is as follows: According to the specific height of the wind cap 6, the four brackets 5 are connected to the platform 4 with bolts so that the platform 4 is at a certain height from the wind cap 6. After installation, the entire adjustable bracket 5 is placed around the wind cap 6 that needs to be disassembled, keeping the wind cap 6 at the center of the adjustable bracket 5 platform 4. The jack 1 is placed at the top center of the platform 4, and the top plate 2 is placed at the top of the jack 1. At this time, the telescopic end of the jack 1 is in contact with the circular groove. The four iron hooks 7 are connected to the four ventilation holes one by one. At this time, the jack 1 is started, and the telescopic end of the jack 1 pushes upward, driving the top plate 2 to move upward. At this time, the iron hooks 7 drive the wind cap 6 to move upward until the wind cap 6 is separated from the pipe seat 8. The jack 1 is stopped, and the disassembly of the wind cap 6 is completed.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for quickly removing the furnace vent cap of a circulating fluidized bed boiler, comprising a vent cap, wherein the side wall of the vent cap is provided with multiple ventilation holes, characterized in that: The ventilation hole is connected to an iron hook, which is connected to an iron chain. The top of the multiple iron chains is connected to a top plate, and a jack is connected directly below the top plate. The jack is connected to an adjustable bracket, which is located around the vent cap.

2. The device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to claim 1, characterized in that: The diameter of the iron hook is the same as the diameter of the ventilation hole.

3. The device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to claim 2, characterized in that: The adjustable bracket includes a platform and multiple supports, each with multiple screw holes. Multiple hinges are connected to the bottom of the platform around its perimeter, and the hinges are connected to the horizontal screw holes.

4. The device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to claim 3, characterized in that: The bottom end of the top plate is provided with a circular groove, the diameter of which is the same as that of the telescopic end of the jack.

5. The device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to claim 4, characterized in that: The iron chain is vertically connected to the top plate.

6. The device for quickly removing the furnace vent cap of a circulating fluidized bed boiler according to claim 5, characterized in that: The lengths of the multiple chains are the same.

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