Anti-blocking efficient oxidizing air spray gun

Abstract

The application provides an anti-blocking efficient oxidizing air spray gun, which comprises an out-of-tower oxidizing air pipe, a flushing water interface, a rotary joint inlet flange, a rotary joint, a rotary joint outlet flange, a steering handle, a steering spray gun, a mechanical seal, a sealing flange, a sleeve flange, a bottom support, a sliding sleeve, a one-way valve, an agitator impeller, a tower wall and a bottom plate, one end of the steering spray gun is sequentially connected with the rotary joint inlet flange, the rotary joint, the rotary joint outlet flange, the out-of-tower oxidizing air pipe and the flushing water interface, the other end is sequentially provided with the steering handle, the mechanical seal, the sealing flange and the sleeve flange, the steering spray gun in the tower wall is sequentially provided with the sliding sleeve and the one-way valve, the bottom support is arranged between the sliding sleeve and the bottom plate, and the agitator impeller is arranged above the steering spray gun in the tower wall, so that the problems in the prior art that the spray gun is not conducive to the oxidation reaction in the pulp pool and the spray gun support is easy to loosen and cause the gun to shake, break and fall off during operation are solved.

Description

[Technical Field]

[0001] This invention relates to the technical field of wet desulfurization oxidation air systems, and in particular to the technical field of a clog-resistant and highly efficient oxidation air spray gun. [Background Technology]

[0002] In the limestone-gypsum wet desulfurization process, oxidizing air is usually injected into the slurry pool of the absorption tower by an oxidation blower, which oxidizes the calcium sulfite in the slurry pool into calcium sulfate, and finally the calcium sulfate crystallizes and precipitates gypsum in the slurry pool. Currently, the main methods used in engineering to uniformly diffuse oxidation air into the slurry tank are pipeline networks and spray guns. The pipeline network method involves uniformly laying oxidation air pipelines across almost the entire cross-section of the absorption tower slurry tank. The pipelines are submerged at a certain height in the slurry tank, and the pipelines have evenly downward-facing openings. Oxidation air is ejected under pressure through the openings, filling the entire slurry tank and completing the oxidation process. The spray gun method involves evenly dividing the main oxidation air pipeline into several oxidation air spray guns. The spray guns are arranged in front of the blades of the side-entry agitator. The oxidation air is injected vertically downward into the slurry tank through the spray guns. At the spray gun outlet, it is shredded by the high-speed rotating blades of the side-entry agitator and pushed into the central area of ​​the slurry tank, completing the oxidation process. For example, Chinese Patent CN 102008884 B discloses an oxidation spray gun ammonia addition and side-entry stirring type ammonia desulfurization system, which achieves rapid diffusion and uniform distribution of oxidation air and ammonia through the side-entry agitator installed next to the oxidation spray gun.

[0003] However, existing technologies still have some drawbacks: the complex structure of the pipeline-type oxidation air duct, with its large contact area with the slurry, makes it prone to problems such as unstable fixation, breakage, detachment, blockage, and scaling during operation, seriously affecting the operation of the desulfurization system. Therefore, its installation requirements are high and maintenance is difficult. To avoid pipeline blockage, the oxidation blower usually needs to be kept running continuously, which places stringent requirements on the reliability of the blower. When oxidizing air is sprayed vertically downwards in front of the agitator blades through the spray gun, on the one hand, the oxidizing air enters the mixing tank and moves upwards at a high speed due to buoyancy, resulting in a short residence time in the slurry tank, which is not conducive to its oxidation reaction in the slurry tank. On the other hand, the vertical section of the spray gun is supported on the inner wall of the absorption tower slurry tank, which places high requirements on the reliability of the fixed support. During operation, the clamps are prone to loosening due to slurry disturbance, which can lead to the spray gun being thrown off or broken. [Summary of the Invention]

[0004] The purpose of this invention is to solve the problems in the prior art and to propose a clog-resistant and efficient oxidation air spray gun. It aims to solve the problems in the prior art where the spray gun sprays oxidation air vertically downward in front of the agitator blades, which is not conducive to the oxidation reaction in the slurry tank, and the fixed support of the spray gun is easy to loosen during operation, causing the gun to fall off and break.

[0005] To achieve the above objectives, this invention proposes a clog-resistant and highly efficient oxidation air spray gun, comprising an external oxidation air duct, a flushing water interface, a rotary joint inlet flange, a rotary joint, a rotary joint outlet flange, a steering handle, a steering spray gun, a mechanical seal, a sealing flange, a sleeve flange, a bottom support, a sliding sleeve, a one-way valve, an agitator impeller, a tower wall, and a bottom plate. The flushing water interface is located on the outside of the tower wall, and the external oxidation air duct is disposed between the flushing water interface and the tower wall and connected to the flushing water interface. The end of the external oxidation air duct away from the flushing water interface is sequentially connected to... The device includes a rotary joint inlet flange, a rotary joint, and a rotary joint outlet flange. A steering spray gun is connected to the end of the rotary joint outlet flange furthest from the rotary joint. A steering handle is mounted on the steering spray gun. A mechanical seal, a sealing flange, and a sleeve flange are sequentially connected to the end of the steering spray gun located outside the tower wall on the side furthest from the rotary joint outlet flange. A sliding sleeve and a one-way valve are sequentially connected to the portion of the steering spray gun located inside the tower wall. A bottom support is provided between the sliding sleeve and the bottom plate. The agitator impeller is located above the steering spray gun on the inner side of the tower wall.

[0006] Preferably, the rotary joint is horizontally installed on the outside of the tower wall. The rotary joint is an integrated sealed structure made of 2205 stainless steel, including a fixed end and a rotary end that can rotate relative to each other. The rotation range of the rotary end is 0° to 90°. The fixed end and the rotary end are fixed together by a self-contained buckle. The fixed end is connected to the external oxidation air duct through the inlet flange of the 2205 stainless steel rotary joint and is fixedly installed as a whole. The rotary end is connected to the steering spray gun through the outlet flange of the 2205 stainless steel rotary joint. The whole can rotate, which makes it easier to turn the steering spray gun.

[0007] Preferably, the steering spray gun is made of 2205 stainless steel and includes a horizontal pipe section and a tail pipe section. The horizontal pipe section is partially located on the outside of the tower wall and partially on the inside of the tower wall. The tail of the horizontal pipe section is 90° bent. The tail pipe section is located on the inside of the tower wall and has a length greater than 150mm. The tail end face of the tail pipe section forms an angle of 30° to 45° with the horizontal end face. The one-way valve is installed on the tail pipe section and is located directly below the agitator impeller. This ensures the normal operation of the spray gun. The 2205 stainless steel material enhances the spray gun's compressive strength and corrosion resistance.

[0008] Preferably, the mechanical seal, sealing flange, and sleeve flange are all made of 2205 stainless steel. The mechanical seal, sealing flange, and sleeve flange are connected by flanges. The sleeve flange is welded to the outside of the tower wall. The horizontal pipe section passes through the center of the assembly formed by the mechanical seal, sealing flange, and sleeve flange. The flange connection is simple to operate, easy to install, and can withstand greater pressure.

[0009] Preferably, the sliding sleeve, bottom support, and base plate are welded together, and the horizontal pipe section passes through the sliding sleeve. The length of the sliding sleeve is 100mm-150mm, and the inner diameter of the sliding sleeve is 4mm-6mm larger than the outer diameter of the horizontal pipe section. The sliding sleeve is made of corrosion-resistant and wear-resistant stainless steel, which can make the sliding sleeve and the horizontal pipe section more firmly installed on the inner side of the tower wall. The wear-resistant stainless steel material can increase the service life of the sliding sleeve.

[0010] Preferably, the steering handle is located on the portion of the horizontal pipe section located on the outer side of the tower wall. The steering handle is located between the outlet flange of the rotary joint and the mechanical seal. The limit range of the steering handle is from directly above to directly to the left of the steering spray gun. When the steering handle is turned to directly above the steering spray gun, the one-way valve and the tail pipe section point vertically upward toward the agitator impeller, which facilitates the rotation of the rotary end, the steering spray gun and the one-way valve through the steering handle to flush the agitator impeller and prevent scaling and clogging.

[0011] Preferably, the steering handle is on the same plane as the horizontal pipe section, the one-way valve, and the tail pipe section, which facilitates the shutdown of the oxidation air system.

[0012] The beneficial effects of this invention are as follows: Compared with the prior art, the present invention provides a simple, stable, and reliable anti-clogging and efficient oxidation air spray gun with fewer components, making it easy to operate and maintain, and less prone to damage that could cause system malfunctions. By setting up a flushing water interface and a one-way valve, the spray gun can be horizontally turned when the oxidation air system is shut down, so that the spray gun outlet direction is closer to the direction of slurry disturbance at the bottom of the agitator blades, which can effectively prevent the spray gun from clogging and avoid affecting system efficiency. The vertically upward layout of the oxidation spray gun allows the sprayed oxidation air to be effectively affected by the stirring jet action of the agitator impeller, enhancing the movement ability of the oxidation air in all directions and making it more dispersed, thus effectively improving the oxidation effect of calcium sulfite. It not only has multiple anti-clogging and anti-scaling functions, but also has excellent oxidation effect, solving the problems of the prior art where the spray gun sprays oxidation air vertically downward in front of the agitator blades, which is not conducive to the oxidation reaction in the slurry pool, and the fixed support of the spray gun is prone to loosening during operation, causing the gun to fall off and break.

[0013] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. [Attached Image Description]

[0014] Figure 1 This is a simplified structural diagram of an anti-clogging and highly efficient oxidation air spray gun according to the present invention.

[0015] Figure 2 This is a detailed structural diagram of an anti-clogging and highly efficient oxidation air spray gun according to the present invention.

[0016] Figure 3 This is a top view of the turning spray gun position during operation of the anti-clogging and high-efficiency oxidation air spray gun of the present invention.

[0017] In the diagram: 1-External oxidation duct, 2-Flushing water interface, 3-Rotary joint inlet flange, 4-Rotary joint, 5-Rotary joint outlet flange, 6-Steering handle, 7-Steering spray gun, 8-Mechanical seal, 9-Sealing flange, 10-Sleeve flange, 11-Bottom support, 12-Sliding sleeve, 13-One-way valve, 14-Agitator impeller, 15-Tower wall, 16-Bottom plate, 41-Fixed end, 42-Rotary end, 71-Horizontal pipe section, 72-Tail pipe section, 721-Included angle.

Detailed Implementation Methods

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0019] See Figure 1 This invention discloses a clog-resistant and highly efficient oxidation air spray gun, comprising an external oxidation air duct 1, a flushing water interface 2, a rotary joint inlet flange 3, a rotary joint 4, a rotary joint outlet flange 5, a steering handle 6, a steering spray gun 7, a mechanical seal 8, a sealing flange 9, a sleeve flange 10, a bottom support 11, a sliding sleeve 12, a one-way valve 13, an agitator impeller 14, a tower wall 15, and a base plate 16. The flushing water interface 2 is located outside the tower wall 15. The external oxidation air duct 1 is disposed between the flushing water interface 2 and the tower wall 15 and connected to the flushing water interface 2. A rotary joint is sequentially connected to the end of the external oxidation air duct 1 away from the flushing water interface 2. The system includes an inlet flange 3, a rotary joint 4, and a rotary joint outlet flange 5. A steering spray gun 7 is connected to the end of the rotary joint outlet flange 5 furthest from the rotary joint 4. A steering handle 6 is mounted on the steering spray gun 7. A mechanical seal 8, a sealing flange 9, and a sleeve flange 10 are sequentially connected to the end of the steering spray gun 7 located outside the tower wall 15 on the side furthest from the rotary joint outlet flange 5. A sliding sleeve 12 and a one-way valve 13 are sequentially connected to the portion of the steering spray gun 7 located inside the tower wall 15. A bottom support 11 is provided between the sliding sleeve 12 and the bottom plate 16. The agitator impeller 14 is positioned above the steering spray gun 7 on the inner side of the tower wall 15.

[0020] See Figure 2The rotary joint 4 is horizontally installed on the outside of the tower wall 15. The rotary joint 4 is an integrated sealed structure made of 2205 stainless steel, including a fixed end 41 and a rotating end 42 that can rotate relative to each other. The rotation range of the rotating end 42 is 0° to 90°. The fixed end 41 and the rotating end 42 are fixed together by a self-contained buckle. The fixed end 41 is connected to the external oxidation air duct 1 through the rotary joint inlet flange 3 made of 2205 stainless steel and is fixedly installed as a whole. The rotating end 42 is connected to the turning spray gun 7 through the rotary joint outlet flange 5 made of 2205 stainless steel and can rotate as a whole, which makes it easier to turn the turning spray gun 7. The directional spray gun 7 is made of 2205 stainless steel and includes a horizontal pipe section 71 and a tail pipe section 72. The horizontal pipe section 71 is partially located on the outside of the tower wall 15 and partially on the inside of the tower wall 15. The tail of the horizontal pipe section 71 is 90° bent. The tail pipe section 72 is located on the inside of the tower wall 15 and has a length greater than 150mm. The tail end face of the tail pipe section 72 forms an angle 721 of 30° to 45° with the horizontal end face. The one-way valve 13 is installed on the tail pipe section 72 and is located directly below the agitator impeller 14. This ensures the normal operation of the spray gun. The 2205 stainless steel material enhances the spray gun's compressive strength and corrosion resistance. The mechanical seal 8, sealing flange 9, and sleeve flange 10 are all made of 2205 stainless steel. They are connected by flanges, with the sleeve flange 10 welded to the outside of the tower wall 15. The horizontal pipe section 71 passes through the center of the assembly formed by the mechanical seal 8, sealing flange 9, and sleeve flange 10. The flange connection is simple to operate, easy to install, and can withstand significant pressure. The sliding sleeve 12, bottom support 11, and base plate 16 are welded together. The horizontal pipe section 71 passes through the sliding sleeve 12, which is 100mm-150mm long. The inner diameter of the sliding sleeve 12 is 4mm-6mm larger than the outer diameter of the horizontal pipe section 71. The sliding sleeve 12 is made of corrosion-resistant and wear-resistant stainless steel, which allows the sliding sleeve 12 and the horizontal pipe section 71 to be more securely installed inside the tower wall 15. The wear-resistant stainless steel also extends the service life of the sliding sleeve 12.

[0021] See Figure 3 The steering handle 6 is located on the portion of the horizontal pipe section 71 located outside the tower wall 15. The steering handle 6 is situated between the rotary joint outlet flange 5 and the mechanical seal 8. The limit of the steering handle 6's movement is from directly above to directly to the left of the steering spray gun 7. When the steering handle 6 is rotated to directly above the steering spray gun 7, the one-way valve 13 and the tail pipe section 72 point vertically upwards toward the agitator impeller 14. This facilitates the flushing of the agitator impeller by rotating the rotary end 42, the steering spray gun 7, and the one-way valve 13 through the steering handle 6, preventing scaling and clogging. The steering handle 6 is on the same plane as the horizontal pipe section 71, the one-way valve 13, and the tail pipe section 72, facilitating the shutdown of the oxidation air system.

[0022] Working process of this invention:

[0023] In operation, this invention discloses a high-efficiency, anti-clogging oxidation air spray gun. First, the fixed end 41 of the rotary joint 4 is connected to the external oxidation air duct 1 via the rotary joint inlet flange 3. Then, the rotating end 42 of the rotary joint 4 is connected to the steering spray gun 7 via the rotary joint outlet flange 5. Next, a flushing water interface 2 is connected to the end of the external oxidation air duct 1 furthest from the rotary joint inlet flange 3. A steering handle 6 is installed on the steering spray gun 7. A mechanical seal 8, a sealing flange 9, and a sleeve flange 10 are sequentially connected to the end of the steering spray gun 7 furthest from the rotary joint outlet flange 5. The sleeve flange 10 is welded to the outside of the tower wall 15. Then… The sliding sleeve 12 is welded to the bottom plate 16 on the inner side of the tower wall 15 via the bottom support 11. Finally, the horizontal pipe section 71 of the diverting spray gun 7 is passed through the sleeve flange 10. Part of the horizontal pipe section 71 is located on the outer side of the tower wall 15, and part is located on the inner side of the tower wall 15. A one-way valve 13 is installed on the tail pipe section 72 of the diverting spray gun 7. The one-way valve 13 is located directly below the agitator impeller 14. When the oxidation air spray gun is running, the diverting handle 6 is pulled to the position directly above the diverting spray gun 7, which drives the rotating end 42 of the rotary joint 4 and the diverting spray gun 7 until the one-way valve 13 and the tail pipe section 72 are vertically upward pointing towards the agitator impeller 14. At this time, the oxidation air enters from the top of the oxidation air duct 1 outside the tower, and is sprayed vertically upward through the rotary joint 4, horizontal pipe section 71, one-way valve 13 and tail pipe section 72. When the oxidation air system is shut down, the steering handle 6 is pulled counterclockwise to the horizontal position of the steering spray gun 7, which drives the rotating end 42 of the rotary joint 4 and the steering spray gun 7. Observe from outside the tower towards the center of the slurry pool until the one-way valve 13 and the steering spray gun 7 are in a horizontal state. The present invention has a simple, stable and reliable structure, fewer components, is easy to operate and maintain, and is not easily damaged to cause system abnormalities. By setting a flushing water interface and a one-way valve, the spray gun can still be rotated horizontally when the oxidation air system is shut down. The spray gun's outlet direction is aligned with the direction of slurry disturbance at the bottom of the agitator blades, effectively preventing spray gun clogging and avoiding impact on system efficiency. The vertically upward layout of the oxidation spray gun ensures that the sprayed oxidation air is effectively affected by the agitator impeller's jet action, enhancing the movement of the oxidation air in all directions and resulting in higher dispersion, thus effectively improving the calcium sulfite oxidation effect. It not only has multiple anti-clogging and anti-scaling functions but also has excellent oxidation effect, solving the problems of existing technologies where the spray gun sprays oxidation air vertically downward in front of the agitator blades, which is not conducive to the oxidation reaction in the slurry pool, and the fixed support of the spray gun is prone to loosening during operation, causing the gun to fall off and break.

[0024] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A clog-resistant and highly efficient oxidation air spray gun, characterized in that: The system includes an external oxidation duct (1), a flushing water inlet (2), a rotary joint inlet flange (3), a rotary joint (4), a rotary joint outlet flange (5), a steering handle (6), a steering spray gun (7), a mechanical seal (8), a sealing flange (9), a sleeve flange (10), a bottom support (11), a sliding sleeve (12), a one-way valve (13), an agitator impeller (14), a tower wall (15), and a bottom plate (16). The flushing water inlet (2) is located outside the tower wall (15). The external oxidation duct (1) is located between the flushing water inlet (2) and the tower wall (15) and connected to the flushing water inlet (2). The end of the external oxidation duct (1) away from the flushing water inlet (2) is connected in sequence to the rotary joint inlet flange (3), a rotary joint outlet flange (4), a rotary joint outlet flange (5), a steering handle (6), a steering spray gun (7), a mechanical seal (8), a sealing flange (9), a sleeve flange (10), a bottom support (11), a sliding sleeve (12), a one-way valve (13), an agitator impeller (14), a tower wall (15), and a bottom plate (16). The adapter (4) and the rotary connector outlet flange (5) are connected to a steering spray gun (7) at the end of the rotary connector outlet flange (5) away from the rotary connector (4). A steering handle (6) is set on the steering spray gun (7). The end of the steering spray gun (7) located outside the tower wall (15) is connected in sequence to a mechanical seal (8), a sealing flange (9), and a sleeve flange (10) on the side away from the rotary connector outlet flange (5). The part of the steering spray gun (7) located inside the tower wall (15) is connected in sequence to a sliding sleeve (12) and a one-way valve (13). A bottom support (11) is provided between the sliding sleeve (12) and the bottom plate (16). The agitator impeller (14) is located above the steering spray gun (7) inside the tower wall (5).

2. The anti-clogging and high-efficiency oxidation air spray gun according to claim 1, characterized in that: The rotary joint (4) is horizontally installed on the outside of the tower wall (15). The rotary joint (4) is an integrated sealed structure made of 2205 stainless steel, including a fixed end (41) and a rotary end (42) that can rotate relative to each other. The rotation range of the rotary end (42) is 0° to 90°. The fixed end (41) and the rotary end (42) are fixed together by a self-adhesive buckle. The fixed end (41) is connected to the external oxidation air duct (1) through the rotary joint inlet flange (3) made of 2205 stainless steel. The rotary end (42) is connected to the steering spray gun (7) through the rotary joint outlet flange (5) made of 2205 stainless steel.

3. A clog-resistant and highly efficient oxidation air spray gun according to claim 1, characterized in that: The steering spray gun (7) is made of 2205 stainless steel and includes a horizontal pipe section (71) and a tail pipe section (72). The horizontal pipe section (71) is partially located on the outside of the tower wall (15) and partially on the inside of the tower wall (15). The tail of the horizontal pipe section (71) is 90° bent. The tail pipe section (72) is located on the inside of the tower wall (15). The length of the tail pipe section (72) is greater than 150mm. The tail end face of the tail pipe section (72) forms an angle (721) of 30° to 45° with the horizontal end face. The one-way valve (13) is installed on the tail pipe section (72) and is located directly below the impeller (14) of the agitator.

4. A clog-resistant and highly efficient oxidation air spray gun according to claim 3, characterized in that: The mechanical seal (8), sealing flange (9), and sleeve flange (10) are all made of 2205 stainless steel. The mechanical seal (8), sealing flange (9), and sleeve flange (10) are connected by flanges. The sleeve flange (10) is welded to the outside of the tower wall (15). The horizontal pipe section (71) passes through the center of the assembly formed by the mechanical seal (8), sealing flange (9), and sleeve flange (10).

5. A clog-resistant and highly efficient oxidation air spray gun according to claim 3, characterized in that: The sliding sleeve (12), bottom support (11) and base plate (16) are welded together. The horizontal pipe section (71) passes through the sliding sleeve (12). The length of the sliding sleeve (12) is 100mm-150mm. The inner diameter of the sliding sleeve (12) is 4mm-6mm larger than the outer diameter of the horizontal pipe section (71). The sliding sleeve (12) is made of corrosion-resistant and wear-resistant stainless steel.

6. A clog-resistant and highly efficient oxidation air spray gun according to claim 3, characterized in that: The steering handle (6) is located on the part of the horizontal pipe section (71) located outside the tower wall (15). The steering handle (6) is located between the rotary joint outlet flange (5) and the mechanical seal (8). The limit range of the steering handle (6) is from directly above the steering spray gun (7) to directly to the left. When the steering handle (6) is turned to directly above the steering spray gun (7), the one-way valve (13) and the tail pipe section (72) point vertically upward toward the agitator impeller (14).

7. A clog-resistant, high-efficiency oxidation air spray gun according to any one of claims 1 to 6, characterized in that: The steering handle (6) is on the same plane as the horizontal pipe section (71), the one-way valve (13), and the tail pipe section (72).

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