Gas blow-by and liquid accumulation prevention device for exhaust pipeline of acid mist tail gas absorption equipment

Abstract

The utility model relates to a blow-by and liquid accumulation prevention device for an exhaust pipeline of acid mist tail gas absorption equipment, and belongs to the technical field of waste gas treatment equipment. Through the magnetic adsorption effect of the magnetic block and the valve cover in the anti-blow-by assembly and the physical characteristic that the valve cover droops due to the dead weight to be closed and sealed, the problem that a traditional butterfly valve is not tightly closed due to material deformation is solved, poisonous gas is effectively prevented from reversely permeating into a channel for overhauling a fan, the anti-blow-by function is achieved, and the service life of the butterfly valve is prolonged. And meanwhile, the electric heating tube is arranged at the bottom of the square box and used for heating the acid mist tail gas, so that the acid mist tail gas is prevented from being cooled to generate accumulated liquid, and the smoothness of an exhaust channel is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste gas treatment equipment technical field, concretely relates to a kind of acid mist tail gas absorption equipment exhaust line anti-channeling, anti-accumulation device. BACKGROUND

[0002] During the operation of the acid mist tail gas absorption equipment exhaust line, only one of the two systems can operate, and the other system needs to be shut down for standby. With the production, the production switching of the two systems is carried out through the reversing valve according to the production needs. When the fan of one system is running, the fan of the other system needs to stop running for maintenance. During maintenance, it is necessary to ensure that the toxic and harmful gases in the acid mist tail gas absorption equipment exhaust line of the running system cannot channel into the fan of the other system, otherwise it will cause poisoning injury to personnel.

[0003] Currently, large-diameter butterfly valves or check valves are usually used for on-off operation on the market, but there are disadvantages that the plastic material inside the valve deforms and bends during long-term operation, resulting in incomplete closing. During the system switching process, the acid mist tail gas of the running exhaust system channels into the maintenance fan of the shutdown system, causing toxic gas leakage and poisoning injury to maintenance personnel. UTILITY MODEL CONTENTS

[0004] In order to overcome the problem that large-diameter butterfly valves or check valves are usually used for on-off operation in the background art, but there are disadvantages that the plastic material inside the valve deforms and bends during long-term operation, resulting in incomplete closing. During the system switching process, the acid mist tail gas of the running exhaust system channels into the maintenance fan of the shutdown system, causing toxic gas leakage and poisoning injury to maintenance personnel, the utility model provides a kind of acid mist tail gas absorption equipment exhaust line anti-channeling, anti-accumulation device;Through the magnetic adsorption effect of magnetic block and valve cover in anti-channeling component, combined with the physical characteristics of valve cover self-weight sagging closure sealing, the problem of incomplete closing of traditional butterfly valve caused by material deformation is solved, the channel of toxic gas reverse infiltration into maintenance fan is effectively blocked, the anti-channeling function is realized, thereby improving the safety of worker maintenance, maintenance and maintenance equipment, at the same time, electric heating tube is arranged at the bottom of square box for heating acid mist tail gas, to prevent acid mist tail gas from producing accumulation due to cold, to ensure that the exhaust passage is unobstructed.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A device for preventing cross-flow and liquid accumulation in the exhaust pipe of an acid mist tail gas absorption equipment mainly includes an acid mist tail gas spray tower, a first fan, a second fan, an exhaust stack, an anti-cross-flow component, a first exhaust pipe, a second exhaust pipe, a reversing valve, and an electric heating element. The top of the acid mist tail gas spray tower is connected to the air inlet of the first fan and the second fan through a first exhaust pipe with branch pipes. A reversing valve for controlling the exhaust of the first fan or the second fan is installed at the branch pipe connection of the first exhaust pipe. The exhaust ports of the first fan and the second fan are connected through a... The second exhaust pipe of the branch pipe is connected to the exhaust stack. Anti-gas-passing components are installed at the exhaust ports of the first and second fans. The top of the anti-gas-passing components is fixedly connected to the end of the second exhaust pipe. The anti-gas-passing components include a square box, a support cylinder, a short shaft, a valve cover, a magnetic block, and a connecting cylinder. The bottom and top of the square box are provided with connecting cylinders. Two valve covers that can be flipped up and down are installed inside. The bottom of the square box is provided with a support cylinder that is coaxial with the connecting cylinder. Magnetic blocks for attracting the valve cover to close are evenly arranged along the circumference on the inner wall of the support cylinder. Electric heating tubes that are electrically connected to the controller are arranged in a ring at the bottom of the square box.

[0006] The inner wall of the square box is equipped with two sets of rotatable short shafts. The ends of the short shafts are provided with strip-shaped slots along the axial direction. The end of the valve cover is inserted into the strip-shaped slots and fixed with screws.

[0007] The top of the support cylinder is provided with an annular protrusion, and an annular groove for embedding a silicone rubber sealing ring is formed on the annular protrusion.

[0008] The square box is equipped with a detachable sealing cover at the top, and a sealing gasket is provided between the bottom surface of the sealing cover and the top of the square box. A connecting cylinder communicating with the inside of the square box is provided on the sealing cover.

[0009] The branch end of the first exhaust pipe is equipped with a first canvas pipe that connects to the air inlets of the first and second fans, and the exhaust ports of the first and second fans are equipped with second canvas pipes that connect to the bottom end of the connecting cylinder.

[0010] The valve cover end is provided with a silicone rubber gasket.

[0011] The beneficial effects of this utility model are:

[0012] This invention solves the problem of incomplete closure caused by material deformation in traditional butterfly valves by using the magnetic adsorption between the magnetic block and the valve cover in the anti-gas-crossing component, combined with the physical characteristics of the valve cover closing and sealing due to its own weight. It effectively blocks the backflow of toxic gases into the maintenance fan, realizing the anti-gas-crossing function, thereby improving the safety of workers in inspecting, maintaining and repairing equipment. At the same time, an electric heating tube is arranged at the bottom of the square box to heat the acid mist exhaust gas, preventing the acid mist exhaust gas from accumulating liquid due to cooling, and ensuring that the exhaust channel is unobstructed. Attached Figure Description

[0013] Figure 1 is a three-dimensional schematic view of the utility model.

[0014] Figure 2 is a three-dimensional schematic view of the anti-channeling assembly.

[0015] Figure 3 is an exploded view of the anti-channeling assembly.

[0016] Figure 4 is a three-dimensional schematic view of the anti-channeling assembly in an open valve cover state.

[0017] Figure 5 is a planar schematic view of the anti-channeling assembly in a closed valve cover state. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and beneficial effects of the utility model more clear, the preferred embodiments of the utility model will be described in detail below with reference to the drawings, so as to facilitate the understanding of the technical personnel.

[0019] The utility model discloses a kind of acid mist tail gas absorption equipment exhaust pipeline anti-channeling, anti-liquid accumulation device, the acid mist tail gas absorption equipment exhaust pipeline anti-channeling, anti-liquid accumulation device mainly includes acid mist tail gas spray tower 1, first fan 2, second fan 3, exhaust cylinder 4, anti-channeling assembly 5, first exhaust pipe 6, second exhaust pipe 7, reversing valve 8, electric heating tube 9, the top of the acid mist tail gas spray tower 1 is connected with the air inlet of first fan 2 and second fan 3 by the first exhaust pipe 6 of branch pipe, reversing valve 8 for controlling the exhaust of first fan 2 or second fan 3 is installed in the branch pipe connection of first exhaust pipe 6, the air outlet of first fan 2 and second fan 3 is connected with exhaust cylinder 4 by the second exhaust pipe 7 of branch pipe, the air outlet of first fan 2 and second fan 3 is all installed with anti-channeling assembly 5, and the top end of anti-channeling assembly 5 is fixedly connected with the end of second exhaust pipe 7;The anti-channeling assembly 5 includes square box 501, support cylinder 502, short shaft 503, valve cover 504, magnetic block 505, connecting cylinder 506, the bottom and top of the square box 501 are provided with connecting cylinder 506, and two valve covers 504 that can be turned up and down are installed inside, and the bottom of square box 501 is provided with support cylinder 502 with the same axis as connecting cylinder 506, and magnetic block 505 for attracting valve cover 504 to close is evenly arranged on the inner wall of support cylinder 502 in circumferential direction, and electric heating tube 9 electrically connected with controller is annularly arranged on the bottom of square box 501.

[0020] During operation, staff switch the exhaust system using reversing valve 8 according to production needs. Taking the system where the first fan 2 is operating and the system where the second fan 3 is shut down for hot standby as an example, after the acid mist exhaust gas is treated with sodium hydroxide solution in the acid mist exhaust gas spray tower 1, it enters the first fan 2 through the first exhaust pipe 6. When the gas passes through the anti-gas-crossing component 5 at the exhaust port of the first fan 2, the valve cover 504 in the anti-gas-crossing component 5 flips outward and opens under the buoyancy of the gas, ensuring smooth airflow. At this time, the valve cover 504 in the anti-gas-crossing component 5 at the exhaust port of the second fan 3 is in a closed and sealed state under the action of its own gravity, magnetic force and the pressure of the reverse gas. This solves the problem of incomplete closure caused by material deformation of traditional butterfly valves, effectively blocks the reverse infiltration of toxic gas into the maintenance fan, realizes the anti-gas-crossing function, and thus ensures that maintenance personnel can carry out normal maintenance and repair work on the shutdown system. At the same time, an electric heating tube 9 is arranged at the bottom of the square box 501 to heat the acid mist exhaust gas, and the heating temperature of the electric heating tube 9 is controlled by the controller to prevent the acid mist exhaust gas from accumulating liquid due to cooling, ensuring that the exhaust channel is unobstructed.

[0021] Two sets of rotatable short shafts 503 are installed on the inner wall of the square box 501. The ends of the short shafts 503 are provided with strip-shaped slots 5031 along the axial direction. The end of the valve cover 504 is inserted into the strip-shaped slots 5031 and fixed with screws. During maintenance, the valve cover 504 can be pulled out from the short shafts by simply loosening the screws, without removing the short shafts 503, which improves the replacement efficiency of the valve cover 504.

[0022] The top of the support cylinder 502 is provided with an annular protrusion 5021, and an annular groove for embedding a silicone rubber sealing ring is provided on the annular protrusion 5021. The silicone rubber sealing ring improves the sealing performance between the valve cover 504 and the support cylinder 502, and prevents harmful gases from entering the maintenance fan during operation, thereby improving the safety of workers in inspecting, maintaining and repairing the equipment.

[0023] The top of the square box 501 is provided with a detachable sealing cover 507. A sealing gasket is provided between the bottom surface of the sealing cover 507 and the top of the square box 501. A connecting cylinder 506 communicating with the inside of the square box 501 is provided on the sealing cover 507. This facilitates the disassembly, replacement, inspection and maintenance of internal parts. At the same time, the sealing gasket ensures airtightness.

[0024] The branch end of the first exhaust pipe 6 is equipped with a first canvas pipe 10 that is connected to the air inlet of the first fan 2 and the second fan 3. The exhaust ports of the first fan 2 and the second fan 3 are equipped with a second canvas pipe 11 that is connected to the bottom end of the connecting cylinder 506. The first canvas pipe 10 and the second canvas pipe 11 have a certain degree of flexibility, which can absorb the vibration and impact generated during the operation of the fan to a certain extent, protect the equipment and reduce noise.

[0025] The valve cover 504 is provided with a silicone rubber pad 508 at the end, further improving the sealing performance, preventing harmful gas from entering the maintenance fan, and ensuring the safety of the workers during maintenance.

[0026] Working process:

[0027] During the working process, the workers switch the exhaust system through the reversing valve 8 according to the production needs. Taking the system running of the first fan 2 and the system shutdown standby of the second fan 3 as an example, the acid mist tail gas is treated by sodium hydroxide solution in the acid mist tail gas spray tower 1, and then enters the first fan 2 through the first exhaust pipe 6. When the gas passes through the anti-gas leakage assembly 5 at the exhaust port of the first fan 2, the valve cover 504 in the anti-gas leakage assembly 5 is turned outward and opened under the buoyancy of the gas, ensuring smooth gas flow. At this time, the valve cover 504 in the anti-gas leakage assembly 5 at the exhaust port of the second fan 3 is in a closed and sealed state under the action of its own gravity, magnetic force and the pressure of the reverse gas, solving the problem of loose closing caused by material deformation of the traditional butterfly valve, effectively blocking the channel of toxic gas reverse infiltration into the maintenance fan, realizing the anti-gas leakage function, and ensuring the normal maintenance and maintenance work of the maintenance personnel on the shutdown system. At the same time, the electric heating pipe 9 is arranged at the bottom of the square box 501 for heating the acid mist tail gas, and the heating temperature of the electric heating pipe 9 is controlled by the controller, preventing the acid mist tail gas from producing liquid accumulation due to cold, and ensuring the smooth exhaust passage.

[0028] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A device for preventing cross-flow of gas and accumulation of liquid in the exhaust pipe of an acid mist tail gas absorption equipment, characterized in that: The aforementioned acid mist tail gas absorption equipment exhaust pipeline anti-gas-crossing and anti-liquid-accumulation device includes an acid mist tail gas spray tower (1), a first fan (2), a second fan (3), an exhaust stack (4), an anti-gas-crossing component (5), a first exhaust pipe (6), a second exhaust pipe (7), a reversing valve (8), and an electric heating tube (9). The top of the acid mist tail gas spray tower (1) is connected to the air inlets of the first fan (2) and the second fan (3) through the first exhaust pipe (6) with a branch pipe. A reversing valve (8) for controlling the exhaust of the first fan (2) or the second fan (3) is installed at the branch pipe connection of the first exhaust pipe (6). The exhaust ports of the first fan (2) and the second fan (3) are connected to the exhaust stack (4) through the second exhaust pipe (7) with a branch pipe. The first fan (2) and the second fan (3) An anti-gas-passing component (5) is installed at each exhaust port. The top of the anti-gas-passing component (5) is fixedly connected to the end of the second exhaust pipe (7). The anti-gas-passing component (5) includes a square box (501), a support cylinder (502), a short shaft (503), a valve cover (504), a magnetic block (505), and a connecting cylinder (506). The bottom and top of the square box (501) are provided with connecting cylinders (506). Two valve covers (504) that can be flipped up and down are installed inside. The bottom of the square box (501) is provided with a support cylinder (502) that is coaxial with the connecting cylinder (506). Magnetic blocks (505) for closing the valve cover (504) are evenly arranged along the circumferential direction on the inner wall of the support cylinder (502). Electric heating tubes (9) that are electrically connected to the controller are arranged in a ring at the bottom of the square box (501).

2. The anti-gas leakage and anti-liquid accumulation device for the exhaust pipeline of an acid mist tail gas absorption equipment as described in claim 1, characterized in that: The inner wall of the square box (501) is equipped with two sets of rotatable short shafts (503). The ends of the short shafts (503) are provided with strip grooves (5031) along the axial direction. The end of the valve cover (504) is inserted into the strip grooves (5031) and fixed with screws.

3. The anti-gas leakage and anti-liquid accumulation device for the exhaust pipeline of an acid mist tail gas absorption equipment as described in claim 1 or 2, characterized in that: The support cylinder (502) is provided with an annular protrusion (5021) at the top, and an annular groove for embedding a silicone rubber sealing ring is provided on the annular protrusion (5021).

4. The anti-gas leakage and anti-liquid accumulation device for the exhaust pipeline of an acid mist tail gas absorption equipment as described in claim 3, characterized in that: The top of the square box (501) is provided with a detachable sealing cover (507). A sealing gasket is provided between the bottom surface of the sealing cover (507) and the top of the square box (501). A connecting cylinder (506) communicating with the inside of the square box (501) is provided on the sealing cover (507).

5. The anti-gas leakage and anti-liquid accumulation device for the exhaust pipeline of an acid mist tail gas absorption equipment as described in claim 1, characterized in that: The first exhaust pipe (6) has a branch pipe end with a first canvas pipe (10) connected to the air inlet of the first fan (2) and the second fan (3), and the exhaust ports of the first fan (2) and the second fan (3) have a second canvas pipe (11) connected to the bottom end of the connecting cylinder (506).

6. The anti-gas leakage and anti-liquid accumulation device for the exhaust pipeline of an acid mist tail gas absorption equipment as described in claim 1 or 2, characterized in that: The valve cover (504) is provided with a silicone rubber pad (508) at its end.

Images