Ash removal device

Abstract

The utility model relates to the technical field of dust removers, and discloses a dust cleaning device which comprises a hollow pipe and a working mechanism, the head of one end of the hollow pipe is bent, and a plurality of vent holes are symmetrically drilled in the bent part close to the end part; the working mechanism comprises a rotating part, a nozzle and a flexible nylon rod, the rotating part is in the shape of a hollow cylinder, an air outlet is formed in the side face of the rotating part, the side face of the rotating part is connected with the flexible nylon rod, and the rotating part is arranged at the vent hole of the hollow pipe and rotationally connected with the hollow pipe; one end of the nozzle is bent, and the other end is fixedly connected with the air outlet of the rotating component. The dust hopper is simple in structure and convenient to operate, and can effectively solve the technical problems that the inner wall of the dust hopper of the power plant dust collector is hardened and blocks the dust hopper.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collectors, in particular to a dust cleaning device. Background Art

[0002] When the boiler electrostatic precipitator is operating normally, the temperature of the ash in the ash hopper is relatively high (120-150℃), and the fluidity is strong. The ash naturally flows to the bottom of the ash hopper and is transported away by compressed air. After the unit is shut down, the temperature of the accumulated ash remaining in the ash hopper decreases (to room temperature), and the fluidity weakens. The ash containing sulfides such as ammonium bisulfate has strong adhesion after absorbing moisture in the air, resulting in ash accumulation on the ash hopper wall, which cannot be transported away normally.

[0003] A certain amount of ash is attached to the inner wall of the cold electrostatic precipitator hopper. As the maintenance work is carried out, the induced draft machine will maintain a long-term operating state for ventilation. The accumulated ash in the denitrification system, air preheater, smoke and air duct, etc. will accumulate in the electrostatic precipitator hopper. After each unit shutdown, the amount of ash in the hopper can reach up to 30 tons. These ashes contain ammonia and sulfur. When they encounter cold air, they will produce some ammonium hydrogen sulfate, which will adhere to the inner wall of the hopper. After a long time, they will form a hardening, causing the hopper to be blocked, and it will not be able to be transported to the ash storage through the ash conveying system. Therefore, every time the power plant shuts down the unit for grade maintenance, there will be a large amount of accumulated ash in the dust collector hopper. At the end of the maintenance, since it is impossible to transport it cleanly by conveying ash, the ash in the hopper has been cleaned by opening a hole to manually release the ash. Opening a hole to release the ash will cause a lot of dust on the site, which seriously affects the civilized hygiene on the site. The released ash must be cleaned up, which requires a lot of manpower, material resources and time, and will also affect the maintenance of the next level of equipment. Sometimes, personnel are even required to go down into the ash hopper to manually remove the ash, which not only poses a high safety risk but also causes environmental pollution.

[0004] The prior art provides an air cannon cleaning device for a dust collector hopper (publication number CN218281046U), which includes a steam drum arranged outside the ash hopper, supplying air to an air blowing pipe located inside the ash hopper through an air pipe, the air blowing pipe consisting of a central vertical pipe and a horizontal pipe, one end of the horizontal pipe is connected to the wall of the central vertical pipe, and the other end is connected to the air pipe. Air is blown into the air blowing pipe through the steam drum so that the dust in the ash hopper can be blown away, thereby achieving the purpose of removing accumulated dust.

[0005] This technical solution still has certain technical problems: the gas impact force provided by the boiler drum is too small to clean the hardened ash; the air blowing pipe is installed in a fixed manner, so it can only clean the ash at the bottom of the ash hopper, but cannot clean the ash on the side wall of the ash hopper. Utility Model Content

[0006] The utility model aims to provide a dust cleaning device to solve the technical problem of dust accumulation and hardening on the inner wall of the dust hopper of a power plant dust collector and blocking the hopper.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A dust cleaning device comprises a hollow tube and a working mechanism. The head of one end of the hollow tube is bent, and a plurality of air vents are symmetrically drilled near the end of the bent portion. The working mechanism comprises a rotating component, a nozzle, and a flexible nylon rod. The rotating component is in the shape of a hollow cylinder with air outlet holes on the side, which is connected to the flexible nylon rod. The rotating component is installed at the air outlet of the hollow tube and is rotatably connected to the hollow tube. One end of the nozzle is bent, and the other end is fixedly connected to the air outlet of the rotating component.

[0009] The principle of this scheme is: in actual application, the compressed air source is connected to the hollow tube. After the compressed air enters the hollow tube, it is discharged through the vent hole at the end of the hollow tube and enters the rotating component. The rotating component is equipped with a nozzle. After the compressed air is ejected from the nozzle, a reaction force is generated to drive the rotating component to rotate, and at the same time, the flexible nylon rod installed on the rotating component is driven to rotate. Through the rotating stirring action of the flexible nylon rod and the sweeping action of the high-speed airflow, the compacted dust inside the dust collector hopper is loosened and falls to the bottom of the hopper.

[0010] The advantages of this solution are:

[0011] 1. Through the coordinated work of the hollow tube, rotating parts, nozzles, and flexible nylon rods, the ash that is hardened and blocked at the bottom and side walls of the ash hopper is loosened by stirring and knocking the nylon rods. The high-speed airflow then blows away the loosened ash and drops it to the bottom of the ash hopper, which can quickly and effectively clean the hardened and blocked ash at the bottom and side walls of the ash hopper;

[0012] 2. The tool has a simple structure, low production cost, and easy operation, which can greatly reduce the labor intensity and maintenance cost of workers;

[0013] 3. The length of the hollow tube and the flexible nylon rod can be changed according to actual needs to cope with various environmental conditions of different dust accumulation locations and different dust block sizes;

[0014] 4. Long service life, can be used for a long time, the flexible nylon rod has certain elasticity and wear resistance, and will not cause damage to the ash hopper wall.

[0015] Preferably, as an improvement, the air outlet is opened in the middle of the side of the rotating component, a locking seat is fixed at the middle of the side of the rotating component opposite to the air outlet, and the flexible nylon rod is detachably mounted on the rotating component through the locking seat. The design of the replaceable flexible nylon rod also makes the maintenance cost of the tool lower, and can better adapt to cleaning work under various working conditions.

[0016] Preferably, as an improvement, a protective cover is further included, which is two steel discs, respectively installed on both sides of the rotating component and welded to the hollow tube, and the radius of the steel disc is greater than the length of the nozzle and less than the length of the flexible nylon rod. Under the protection of the protective cover, the nozzle will not directly contact the accumulated dust or the ash hopper wall, so as to avoid deformation and damage to the nozzle, and will not affect the work of the flexible nylon rod.

[0017] Preferably, as an improvement, the bending angle of the hollow tube is 90 degrees. A bending angle of 90 degrees is more convenient for operators to operate, and avoids interference between the working mechanism and the hollow tube when the bending angle is too large, and it is not convenient for the cleaning mechanism to extend into the ash hopper when the angle is too small.

[0018] Preferably, as an improvement, the bending angle of the nozzle is 90 degrees. When the bending angle of the nozzle is 90 degrees, the jet direction is exactly the tangent direction of the nozzle rotation trajectory circle, and the compressed gas can provide the maximum reaction force for the rotating part, so that the compressed gas can be used to the maximum extent to ensure the high-speed rotation of the rotating part.

[0019] Preferably, as an improvement, there are four vents with a diameter of 10 mm. The four vents are symmetrically distributed on the hollow tube, which is conducive to the uniform entry of air into the rotating component and the relative balance of the rotating component.

[0020] Preferably, as an improvement, the diameter of the air outlet is 7 mm.

[0021] Preferably, as an improvement, the nozzle is made of a 10*1.5 mm steel pipe, the inner wall diameter of which is 7 mm, adapted to the air outlet on the rotating component.

[0022] Preferably, as an improvement, a ball valve is further included, which is a threaded ball valve installed near the end of the non-bending end of the hollow tube. The flow of compressed air entering the hollow tube is adjusted by the ball valve to control the rotation speed of the flexible nylon rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of Embodiment 1 of the present utility model;

[0024] Figure 2 This is a front view of Embodiment 2 of the present utility model;

[0025] Figure 3 It is a left side view of Embodiment 2 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the locking seat of Example 2 of the utility model. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The reference numerals in the drawings of the specification include: a protective cover 1, a nozzle 2, a rotating component 3, a flexible nylon rod 4, a hollow tube 5, a ball valve 6, and a locking seat 7.

[0029] Example 1

[0030] Example 1 is as shown in the attached Figure 1 As shown:

[0031] A dust cleaning device comprises a hollow tube 5 and a working mechanism. The hollow tube 5 is made of a DN20 galvanized steel tube, one end of which is bent 90 degrees, and four air holes with a diameter of 10 mm are symmetrically drilled near the end of the bent part for compressed air to pass through; the working mechanism comprises a rotating component 3, a nozzle 2, and a flexible nylon rod 4. The rotating component 3 is a hollow cylinder in shape, and an air outlet with a diameter of 7 mm is opened in the middle of the side. The nozzle 2 is made of a 10*1.5mm steel tube, one end of the nozzle 2 is bent 90 degrees, and the other end is fixedly connected to the air outlet of the rotating component 3, and its inner diameter just matches the diameter of the air outlet to ensure that air can pass smoothly; the flexible nylon rod 4 has a diameter of 10 mm and is bonded to the middle of the side of the rotating component 3 opposite to the air outlet. The nozzle 2 sprays a high-speed airflow, which can drive the rotating component 3 to rotate, and the rotating component 3 drives the flexible nylon rod 4 to rotate together.

[0032] The rotating component 3 is installed at the vent hole of the hollow tube 5, the internal hollow part corresponds to the vent hole of the hollow tube 5, the rotating component 3 and the hollow tube 5 are clearance-matched, the rotating component 3 and the hollow tube 5 are rotationally connected, and the rotating component 3 can rotate relative to the hollow tube 5; the left and right plane distance of the inner wall of the rotating component 3 is greater than the diameter of the vent hole to ensure that the rotating component 3 will not block the vent hole, or cause the compressed air passing through the vent hole to leak out of the rotating component 3; a protective cover 1 is also connected to the hollow tube 5, and the protective cover 1 is two steel discs, which are respectively installed on both sides of the rotating component 3 and welded to the hollow tube 5. The radius of the disc is slightly larger than the length of the nozzle 2 and much smaller than the length of the flexible nylon rod 4. When the rotating component 3 rotates, the nozzle 2 is completely blocked by the disc, and the flexible nylon rod 4 is blocked by the disc for no more than 1 / 3 of its length. The hollow tube 5 is also provided with a ball valve 6, which is a DN20 threaded ball valve installed near the end of the non-bent end of the hollow tube 5. By adjusting the ball valve 6, the compressed air entering the hollow tube 5 can be controlled, thereby controlling the rotation speed of the rotating component 3.

[0033] In actual use, the operator first places the cleaning tool to the dust accumulation part in the dust collector hopper, and then connects the compressed air source to one end of the hollow tube 5. The operator controls the start and stop and the speed of the rotating component 3 by operating the ball valve 6 on the hollow tube 5. After the compressed air enters the hollow tube 5, it is discharged through the four vents at the end of the hollow tube 5 and enters the rotating component 3. The rotating component 3 is equipped with a nozzle 2. After the compressed air is ejected from the nozzle 2, a reaction force is generated, which can drive the rotating component 3 to rotate, and at the same time drive the flexible nylon rod 4 installed on the rotating component 3 to rotate. Under the protection of the protective cover 1, the nozzle 2 will not directly contact the dust accumulation, nor will it contact the hopper wall, so as to avoid deformation and damage of the nozzle 2. After the rotating component 3 rotates normally, the operator moves the cleaning tool to contact the dust accumulation in the hopper. The high-speed airflow ejected from the nozzle 2 and the rotating stirring action of the flexible nylon rod 4 loosen the hardened dust in the dust collector hopper and drop it to the bottom of the hopper.

[0034] Example 2

[0035] like Figure 2 , Figure 3 As shown, the difference between Example 2 and Example 1 is that a locking seat 7 is welded to the middle of the side of the rotating component 3 opposite to the air outlet, and the flexible nylon rod 4 is detachably mounted on the rotating component 3 through the locking seat 7 and can rotate together with the rotating component 3. Figure 4 As shown, the main body of the locking seat 7 is a hollow cylinder, one end of which is connected to the rotating component 3, and the other end of the head has a thread, which is threadedly connected to a locking nut. The inner wall of the locking nut is away from the threaded end and has two symmetrical limiting protrusions, and a locking steel ball is placed on each of the two limiting protrusions toward the center of the circle.

[0036] In actual use, when the flexible nylon rod 4 needs to be installed on the locking seat 7, the locking nut is removed, the locking steel ball is taken out, the locking nut is put on one end of the flexible nylon rod 4, and then the end of the flexible nylon rod 4 with the locking nut is inserted into the locking seat 7, the locking steel ball is put into the gap between the locking nut and the flexible nylon rod 4, and then the locking nut and the locking seat 7 are connected and tightened. At this time, the locking steel ball is at the top of the thread of the locking seat 7. As the locking nut and the locking seat 7 threads gradually engage, the locking steel ball continues to approach the limiting protrusion until the thread is fully engaged. Since the flexible nylon rod 4 has a certain elasticity, the locking steel ball can be stuck into the limiting protrusion, and the flexible nylon rod 4 is fixed on the locking seat 7. When the flexible nylon rod 7 needs to be removed, the locking nut is loosened from the locking seat 7, the flexible nylon rod 4 and the locking nut are swung in opposite directions until the locking steel ball is loosened, and the locking nut is removed from the flexible nylon rod 4.

[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A dust cleaning device, comprising a hollow tube and a working mechanism, characterized in that: The head of one end of the hollow tube is bent, and a number of air holes are symmetrically drilled near the end of the bent part; the working mechanism includes a rotating component, a nozzle, and a flexible nylon rod. The rotating component is a hollow cylinder with air holes on the side, and the side is connected to the flexible nylon rod. The rotating component is installed at the air hole of the hollow tube and is rotatably connected to the hollow tube; one end of the nozzle is bent, and the other end is fixedly connected to the air hole of the rotating component.

2. A dust cleaning device according to claim 1, characterized in that: The air outlet is arranged in the middle of the side surface of the rotating component, and a locking seat is fixed at the middle of the side surface of the rotating component opposite to the air outlet, and the flexible nylon rod is detachably mounted on the rotating component through the locking seat.

3. A dust cleaning device according to claim 1 or 2, characterized in that: It also includes a protective cover, which is two steel discs, which are respectively installed on both sides of the rotating component and welded to the hollow tube. The radius of the steel disc is greater than the length of the nozzle and less than the length of the flexible nylon rod.

4. A dust cleaning device according to claim 3, characterized in that: The bending angle of the hollow tube is 90 degrees.

5. A dust cleaning device according to claim 4, characterized in that: The nozzle bending angle is 90 degrees.

6. A dust cleaning device according to claim 5, characterized in that: There are 4 vents with a diameter of 10 mm.

7. A dust cleaning device according to claim 6, characterized in that: The diameter of the air outlet hole is 7 mm.

8. A dust cleaning device according to claim 7, characterized in that: The nozzle is made of a 10*1.5mm steel pipe.

9. A dust cleaning device according to claim 8, characterized in that: It also includes a ball valve, which is a threaded ball valve and is installed at a position close to the end of the non-bending end of the hollow tube.

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