Waste heat furnace pipeline ash deposition cleaning device

Abstract

The utility model discloses an accumulated ash cleaning device for a waste heat furnace pipeline, which belongs to the technical field of coking equipment, aims to efficiently clean the waste heat furnace pipeline, and adopts the technical scheme that the device comprises a conical head, a spiral blade, an ash poking furnace gun and a handle, the ash poking furnace gun and the handle are both made of round pipes, and the conical head is fixed at the front end of the ash poking furnace gun; the rear end of the ash poking furnace gun is connected with the front end of the handle, the rear end of the handle is connected with the high-pressure air pipe, a plurality of air outlet holes are formed in the side wall of the ash poking furnace gun, and the spiral blade is wound and fixed on the outer wall of the front end of the ash poking furnace gun. Sulfur micro powder is scraped and cleaned off from the pipe wall through reciprocating movement of the conical head and the spiral blade, meanwhile, dust is blown away through high-pressure gas sprayed out of the gas outlet hole 7, and the situation that a gun head is clamped and locked due to the fact that the dust is gathered in a pipeline can be effectively prevented. By means of the device, the cleaning efficiency of the waste heat furnace pipeline can be improved, and smooth sulfuric acid production is guaranteed.

Description

Technical Field

[0001] The utility model relates to a dust cleaning device for a waste heat furnace pipeline of a sulfuric acid production line in a coal chemical enterprise, belonging to the technical field of coking equipment. Background Art

[0002] In the field of coal chemical technology, the production of sulfuric acid is one of the key factors related to the increase of production and efficiency and the reduction of production costs of modern coal chemical enterprises. The concentrated sulfuric acid produced can meet the daily production consumption in the plant area, reduce external procurement, and reduce the cost per ton of coke. In the process of sulfuric acid production, the SO2 gas generated by the combustion of the incinerator (the combustion of elemental sulfur in the air to generate SO2) and the flow foam that cannot be fully burned in the incinerator form sulfur powder. The sulfur powder is extracted into the waste heat furnace (waste heat boiler) by the negative pressure of the SO2 fan, and the waste heat is transferred to the water supply drum through the flue gas channel and the heat transfer element (heat pipe) to generate steam, and the steam is provided for the production area through the steam external network pipeline. Since the elemental sulfur in the sulfur powder generated in the incinerator is easily adsorbed on the inner wall of the pipeline to form S8 molecular crystals, the elemental sulfur powder adsorbed on the outside of the crystal causes blockage inside the pipeline, making the SO2 gas in the pipeline sluggish, reducing the heat transfer efficiency, and reducing the steam production, which seriously affects the stability and smoothness of subsequent acid production. Therefore, it is necessary to clean the waste heat furnace pipeline in a timely and regular manner.

[0003] The existing cleaning method is to insert a φ40 steel chisel into the waste heat furnace pipeline from the cleaning hole behind the furnace to clear the pipeline. Since the S8 molecular crystals formed by elemental sulfur stick to the inner wall of the pipeline, the dust channel is narrow when the steel chisel is used to clear the pipeline, which can easily cause the steel chisel head to get stuck and cannot be pulled out. Forcibly pulling out the steel chisel can easily cause the pipeline to deform and damage, and the dust is easily squeezed by the steel chisel to form a backlog locally, making subsequent processing more difficult. Due to the above reasons, the existing cleaning method cannot efficiently clean the waste heat furnace pipeline, and it is necessary to passively shut down the machine to clean the blocked pipeline, which seriously affects the smooth progress of sulfuric acid production. Utility Model Content

[0004] The utility model aims to provide a waste heat furnace pipeline dust cleaning device to address the drawbacks of the prior art, so as to efficiently clean the waste heat furnace pipeline and ensure the smooth progress of sulfuric acid production.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for cleaning ash accumulation in a waste heat furnace pipeline comprises a cone head, a spiral blade, an ash-poking gun and a handle, wherein the ash-poking gun and the handle are both made of round tubes, the cone head is fixed at the front end of the ash-poking gun, the rear end of the ash-poking gun is connected to the front end of the handle, the rear end of the handle is connected to the high-pressure air pipe, a plurality of air outlets are provided on the side wall of the ash-poking gun, and the spiral blade is wound around and fixed on the outer wall of the front end of the ash-poking gun.

[0007] In the above-mentioned waste heat furnace pipeline ash cleaning device, a guard plate is fixed between the ash-poking gun and the handle. The guard plate is a circular plate with a diameter larger than the diameter of the waste heat furnace pipeline. The inner cavities of the ash-poking gun and the handle are connected through the center hole of the guard plate.

[0008] In the above-mentioned waste heat furnace pipeline ash cleaning device, the multiple air outlet holes on the side wall of the ash-poking furnace gun are evenly distributed in the gaps between the spiral blades.

[0009] The above-mentioned waste heat furnace pipeline dust cleaning device, the handle is a crank, and the rear end of the handle is connected to the high-pressure air pipe through a universal pipe joint.

[0010] In the above waste heat furnace pipeline dust cleaning device, the diameter of the spiral blade gradually decreases from front to back.

[0011] The above-mentioned waste heat furnace pipeline ash cleaning device, the cone head, spiral blades, ash furnace gun, guard plate, handle and universal pipe joint are all made of 20# low carbon steel.

[0012] The utility model utilizes the reciprocating movement of the cone head and the spiral blades to scrape the sulfur powder off the pipe wall, and at the same time utilizes the high-pressure gas ejected from the air outlet 7 to blow away the dust, which can effectively prevent the dust from accumulating in the pipe and causing the gun head to be stuck and locked. The device can improve the cleaning efficiency of the waste heat furnace pipe and ensure the smooth progress of sulfuric acid production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a partial enlarged picture of the ash stove gun;

[0016] Figure 3 It is a connection diagram of the ash stove gun, guard plate and handle.

[0017] The numbers in the figure are as follows: 1. cone head, 2. spiral blade, 3. ash furnace gun, 4. guard plate, 5. handle, 6. universal pipe joint, 7. air outlet. DETAILED DESCRIPTION

[0018] The utility model aims at solving the problem of difficulty in cleaning the waste heat furnace pipeline of an acid incinerator and provides a waste heat furnace pipeline dust cleaning device. The device has a simple structure and is easy to use. It can effectively remove dust accumulated on the inner wall of the waste heat furnace pipeline, prevent pipeline blockage, reduce the flow resistance of SO2 process gas, improve the utilization rate of waste heat, and ensure the output of steam in the drum.

[0019] See also Figure 1The utility model mainly includes a cone head 1, a spiral blade 2, an ash stove gun 3, a guard plate 4, a handle 5 and a universal pipe joint 6. The ash stove gun 3 and the handle 5 are both made of round tubes, and the handle 5 is a crank. The front end of the ash stove gun 3 is fixedly connected to the cone head 1, the rear end of the ash stove gun 3 is connected to the front end of the handle 5, and the rear end of the handle 5 is connected to the high-pressure air pipe through the universal pipe joint 6. The spiral blade 2 is wound on the outer wall of the front end of the ash stove gun 3, and a plurality of air outlet holes 7 are arranged on the side wall of the ash stove gun 3. The plurality of air outlet holes 7 are evenly distributed in the gap of the spiral blade 2. The guard plate 4 is a circular plate, which is located at the connection between the ash stove gun 3 and the handle 5. The front side of the guard plate 4 is connected to the ash stove gun 3, and the rear side is connected to the handle 5. The inner cavity of the ash stove gun 3 and the handle 5 is connected through the central hole of the guard plate 4. The material of the cone head 1, the spiral blade 2, the ash stove gun 3, the guard plate 4, the handle 5 and the universal pipe joint 6 are all 20# low carbon steel.

[0020] Working principle of the utility model: During the sulfuric acid production process, sulfur powder is adsorbed on the inner wall of the waste heat furnace pipeline and exists in the form of crystalline sulfur, which has the characteristics of strong adsorption and strong corrosiveness. When it is necessary to clean the waste heat furnace pipeline, the device is inserted into the waste heat furnace pipeline from the cleaning hole behind the furnace. The cone head 1 moves back and forth to scrape the sulfur powder off the pipe wall. At the same time, the high-pressure gas ejected from the air outlet 7 cooperates with the spiral blade 2 to blow away the dust and avoid dust accumulation and gun blockage. When the ash furnace gun 3 is operated to withdraw, the dust is taken out of the waste heat furnace pipeline. Repeat the above process until the waste heat furnace pipeline is cleaned. The cone head 1 is installed at the front end of the ash furnace gun 3, which is conducive to the advancement of the ash furnace gun 3. The spiral blade 2 flush with the outer diameter of the cone head 1 can process the fallen sulfur powder in sections and push the sulfur powder to move with the ash furnace gun 3. The guard plate 4 facilitates the operator to apply axial thrust to the ash lance 3. The guard plate 4 also has a limiting function, which can prevent the ash lance 3 from being inserted too far into the waste heat furnace pipeline and unable to be withdrawn. Therefore, the diameter of the guard plate is required to be larger than the diameter of the waste heat furnace pipeline. The handle 5 facilitates the operator to rotate the ash lance 3, improves the cleaning effect, and avoids the situation where the gun head is stuck and locked due to excessive accumulation of materials in the waste heat furnace pipeline. In order to facilitate the rotation of the ash lance 3, a universal pipe joint 6 is installed at the rear end of the handle 5. When the ash lance 3 and the handle 5 rotate, the high-pressure air pipe does not need to rotate with them.

[0021] The ash stove gun 3 is welded and fixed to the cone head 1, the diameter of the spiral blade 2 gradually decreases from front to back, four air outlet holes 7 are arranged in each gap of the spiral blade 2, the ash stove gun 3 and the handle 5 are welded and fixed to the guard plate 4, and the ash stove gun 3 rotates forward to effectively avoid the cone head 1 from being stuck and locked, and a universal pipe joint 6 is arranged behind the handle 5 to prevent the high-pressure air pipe from curling and affecting the rotating operation, and reduce the loss of the high-pressure air pipe (hose).

[0022] Parameters of main components: ash stove gun (outer diameter 32mm, length 4400mm), cone head (diameter 55mm, length 100mm), spiral blade (maximum diameter 55mm, length 80mm, pitch 100mm, number of turns 10), guard plate (diameter 80mm, thickness 10mm), handle (diameter 25mm, length 50mm), universal pipe joint (DN50), the ash stove gun body has 28 air holes (diameter 3mm), to ensure the strength of the gun body, the material is 20# low carbon steel.

[0023] The utility model can clean the sulfur micropowder in the waste heat furnace pipeline in the furnace, ensure the normal pressure and flow rate of SO2 gas in the waste heat furnace, and improve the stability of the subsequent equipment of the acid-making waste heat furnace. The reasonable application of the device reduces the amount of sulfur micropowder attached to the waste heat furnace pipeline, reduces the corrosion of the waste heat furnace pipeline, and prolongs the service life of the equipment. At the same time, it greatly improves the efficiency of heat recovery and the output of hot water and steam, and reduces production costs.

Claims

1. A waste heat furnace pipeline dust cleaning device, characterized in that: The structure comprises a cone head (1), a spiral blade (2), an ash stove gun (3) and a handle (5), wherein the ash stove gun (3) and the handle (5) are both made of a round tube, the cone head (1) is fixed at the front end of the ash stove gun (3), the rear end of the ash stove gun (3) is connected to the front end of the handle (5), the rear end of the handle (5) is connected to a high-pressure air pipe, a plurality of air outlet holes (7) are provided on the side wall of the ash stove gun (3), and the spiral blade (2) is wound around and fixed on the outer wall of the front end of the ash stove gun (3).

2. The waste heat furnace pipeline dust cleaning device according to claim 1 is characterized in that: A guard plate (4) is fixed between the ash furnace gun (3) and the handle (5); the guard plate (4) is a circular plate, the diameter of which is larger than the diameter of the waste heat furnace pipeline; the inner cavities of the ash furnace gun (3) and the handle (5) are connected through the central hole of the guard plate (4).

3. A waste heat furnace pipeline dust cleaning device according to claim 1 or 2, characterized in that: The plurality of air outlet holes (7) on the side wall of the ash-poking furnace gun (3) are evenly distributed in the gaps between the spiral blades (2).

4. The waste heat furnace pipeline dust cleaning device according to claim 3 is characterized in that: The handle (5) is a crank, and the rear end of the handle (5) is connected to the high-pressure air pipe via a universal pipe joint (6).

5. The waste heat furnace pipeline dust cleaning device according to claim 4 is characterized in that: The diameter of the spiral blade (2) gradually decreases from front to back.

6. The waste heat furnace pipeline dust cleaning device according to claim 5 is characterized in that: The cone head (1), spiral blade (2), ash furnace gun (3), guard plate (4), handle (5) and universal pipe joint (6) are all made of 20# low carbon steel.

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