Recovery desulfurization tower for sulfur dioxide in sulfuric acid tail gas

Abstract

The invention discloses a desulfurization tower for recycling sulfur dioxide in sulfuric acid tail gas, which comprises a tower body filled with ammonia water, a gas inlet pipe, an efficient activated carbon layer, a movable ring plate, a hose, a vent hole, a stirring piece, a rotating plate, a limiting frame, a rotating plate and a fixed column, the movable ring plate reciprocates to pull the hose to move, so that the position of the hose is changed, sulfuric acid tail gas enters different positions in the tower body and reacts with ammonia water, and recovery of sulfur dioxide is completed; the rotating plate rotates to act on the inclined fixing column, so that the movable annular plate which reciprocates back and forth in the horizontal direction reciprocates up and down at a certain height in the vertical direction on one hand, and reciprocates and rotates at a certain horizontal angle on the other hand, and the moving distance, position and angle of the hose are all changed; contact reaction of sulfuric acid tail gas and ammonia water is increased, and recovery efficiency of sulfur dioxide is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of the structure of a recovery desulfurization tower, and specifically to a sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas. Background Art

[0002] Sulfur dioxide in the tail gas of sulfuric acid production mainly comes from the following processes: by-products of raw material combustion: sulfur dioxide is generated by burning pyrite or sulfur; or incomplete process conversion: the conversion rate and absorption rate of sulfur dioxide to sulfur trioxide are both lower than 100%, and the unreacted sulfur dioxide and sulfur trioxide remain in the tail gas; or acid mist entrainment: when sulfuric acid absorbs sulfur trioxide, a small amount of sulfuric acid is entrained to form acid mist; to ensure the separation of sulfur dioxide in the sulfuric acid tail gas, generally a recovery desulfurization tower device is used, and the sulfuric acid tail gas contacts and reacts with the reaction liquid (usually ammonia water), so as to separate sulfur dioxide.

[0003] In the existing recovery desulfurization tower, the tail gas is released into the recovery desulfurization tower with ammonia water through an inlet pipe, but the position of the inlet pipe is fixed, resulting in a short residence time of the gas in the ammonia water, and the reaction position of the gas and ammonia water is also fixed, so that the contact efficiency between the gas and the liquid is not high, and the recovery efficiency of sulfur dioxide cannot be improved.

[0004] Therefore, we propose a sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas. Summary of the Invention

[0005] The purpose of the present invention is to provide a sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides a sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas, including a tower body filled with ammonia water, and an inlet pipe is arranged in the tower body; It further includes: a plurality of high-efficiency activated carbon layers are installed in the inlet pipe, a movable ring plate is movably arranged in the tower body, a plurality of loose hoses are communicated between the movable ring plate and the inlet pipe, air holes are opened on the hoses and the movable ring plate, a stirring member is driven to rotate in the tower body, a rotating plate is fixedly connected to the bottom end of the stirring member, a limit frame distributed obliquely is slidably matched with the tower body through a limiting member, and a sliding member is arranged between the limit frame and the rotating plate; A rotating plate rotated by the sliding member, a plurality of fixed columns arranged obliquely are fixedly connected to the inner wall of the movable ring plate, and the rotating plate is meshed and cooperated with the plurality of fixed columns.

[0007] Further, a first support plate and a second support plate are fixedly connected to the middle of the limit frame, and the end of the second support plate is in pressing fit with the movable ring plate.

[0008] Further, the limiting member includes a fixing plate fixedly connected to the intake pipe. A sleeve that is slidably engaged with the second support plate is fixedly connected to the top of the fixing plate. The intake pipe is a rigid intake pipe.

[0009] Further, the sliding member includes a self-rotating rod rotatably connected to the first support plate. One end of the self-rotating rod is fixedly connected to the rotating plate, and the other end passes through the limiting frame and is fixedly connected to a helical gear. An inclined toothed plate that meshes with the helical gear is rotatably connected to the end of the rotating plate. The inclined toothed plate slides within the limiting frame.

[0010] Further, the end of the self-rotating rod extends out of the central axis of the rotating plate. The inner wall of the movable ring plate is fixedly connected with limiting sliding plates distributed obliquely. The inclination angle of the limiting sliding plates is consistent with the inclination angle of the plurality of fixed columns.

[0011] Further, a plurality of fitting grooves that engage with the fixed columns are formed at the edge of the rotating plate. The side of the rotating plate close to the inner wall of the movable ring plate is arc-shaped. The rotating plate is away from the limiting sliding plate.

[0012] Further, a connecting plate is fixedly connected to the bottom of the first support plate. A pressing plate that is slidably engaged with the limiting sliding plate is fixedly connected to the connecting plate. The top of the pressing plate is at an angle consistent with the inclination angle of the limiting sliding plate.

[0013] Further, the connecting plate away from the rotating plate is L-shaped to avoid operation interference. The pressing plate is of a T-shaped structure.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The rotating plate makes a circular motion. Under the limiting action of the limiting member, through the first support plate, the second support plate, and the limiting frame, the movable ring plate makes a reciprocating movement back and forth, pulling the hose to move, thereby changing the position of the hose, enabling the sulfuric acid tail gas to enter different positions in the tower body, reacting with ammonia water, and completing the recovery of sulfur dioxide; And by the rotation of the rotating plate acting on the inclined fixed columns, while the movable ring plate making a reciprocating movement back and forth in the horizontal direction, on the one hand, it makes a reciprocating movement up and down at a certain height in the vertical direction, and on the other hand, the movable ring plate makes a reciprocating self-rotating movement at a certain horizontal angle, so that the movement distance, position, and angle of the hose all change, increasing the contact reaction between the sulfuric acid tail gas and ammonia water, and ensuring the recovery efficiency of sulfur dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the cooperation between the internal structure of the tower body of the present invention and the intake pipe; Figure 3 is a schematic diagram of the cooperation structure between the movable ring plate of the present invention and the intake pipe; Figure 4 It is a schematic bottom view of the mating structure between the movable ring plate and the intake pipe of the present invention; Figure 5 It is a schematic view of the structure of the limiting member of the present invention; Figure 6 It is a schematic exploded view of the stirring member and the rotating plate of the present invention; Figure 7 It is a schematic exploded view of the rotating plate and the inclined toothed plate of the present invention; Figure 8 It is a schematic view of the structure of the rotating plate and the limiting frame away from the first support plate of the present invention; Figure 9 It is a schematic view of the mating structure between the inclined toothed plate and the helical gear located within the limiting frame of the present invention; Figure 10 It is a schematic view of the mating structure between the rotating plate, the fixed column, the inclined toothed plate and the helical gear of the present invention; Figure 11 It is a schematic view of the mating structure between the rotating plate, the fixed column and the connecting plate of the present invention; Figure 12 It is a schematic view of the mating structure between the self-rotating rod, the limiting sliding plate and the pressing plate of the present invention; Figure 13 It is a schematic side view of the mating structure between the self-rotating rod, the limiting sliding plate and the pressing plate of the present invention; Figure 14 For the present invention Figure 13 exploded view of the structure.

[0016] In the figure: 1, tower body; 2, intake pipe; 3, movable ring plate; 4, hose; 5, ventilation hole; 6, stirring member; 7, rotating plate; 8, limiting frame; 9, rotating plate; 10, fixed column; 11, first support plate; 12, second support plate; 13, fixing plate; 14, sleeve; 15, self-rotating rod; 16, helical gear; 17, inclined toothed plate; 18, limiting sliding plate; 19, mating groove; 20, connecting plate; 21, pressing plate; 22, motor. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 - 14 , the present invention provides a desulfurization tower for recovering sulfur dioxide in sulfuric acid tail gas, including a tower body 1 filled with ammonia water, and an intake pipe 2 is arranged inside the tower body 1; In this application, the sulfuric acid tail gas enters the tower body 1 with ammonia water through the intake pipe 2. After contacting with the ammonia water, sulfur dioxide in the sulfuric acid tail gas is separated out. The treated gas enters the next treatment process through the outlet pipe (shown in the figure) at the top of the tower body 1; It also includes: multiple high-efficiency activated carbon layers are installed in the intake pipe 2. An active ring plate 3 (with an inner cavity) is movably arranged in the tower body 1. A plurality of loose hoses 4 are connected between the active ring plate 3 and the intake pipe 2. Air holes 5 are formed in the hoses 4 and the active ring plate 3. A stirring member 6 is driven to rotate in the tower body 1. Stirring plates for increasing the stirring efficiency are arranged on the stirring member 6. A rotating plate 7 is fixedly connected to the bottom end of the stirring member 6. A limiting frame 8 distributed obliquely is slidably matched with the tower body 1 through a limiting member. A sliding member is arranged between the limiting frame 8 and the rotating plate 7; A rotating plate 9 rotated by the sliding member. A plurality of fixed columns 10 arranged obliquely are fixedly connected to the inner wall of the active ring plate 3. The rotating plate 9 is engaged with the plurality of fixed columns 10.

[0019] In this application, through the contact between the sulfuric acid tail gas and the ammonia water liquid, sulfur dioxide in the tail gas passes through the ammonia water, so that it is separated from the gas, improving the desulfurization efficiency and preventing air pollution; Compared with the prior art, in this application, through the movable hose 4, the contact position between the gas and the liquid changes, making the residence time of the gas in the liquid longer, and the position where the gas stays changes. The specific implementation method is as follows: The motor 22 at the top of the tower body 1 drives the stirring member 6 to rotate slowly in a self-rotation manner, making the rotating plate 7 perform a circular motion. Under the limiting action of the limiting member, the first support plate 11, the second support plate 12 and the limiting frame 8 perform reciprocating activities, so that the active ring plate 3 performs reciprocating activities, pulling the hose 4 to move, thereby changing the position of the hose 4, making the sulfuric acid tail gas enter different positions in the tower body 1 and react with the ammonia water to complete the recovery of sulfur dioxide. Among them, the hose 4 is loose and has a large mutual distance, and will not be pulled excessively or entangled; While performing the circular motion of rotation, the rotating plate 9 is driven to rotate at intervals. The rotating plate 9 acts on the inclined fixed columns 10, so that while the active ring plate 3 performing reciprocating activities in the horizontal direction, on the one hand, it performs reciprocating activities up and down at a certain height in the vertical direction, and on the other hand, the active ring plate 3 performs reciprocating self-rotation activities at a certain horizontal angle; So that the top end of the hose 4 performs large-distance reciprocating activities in the horizontal direction, small-distance reciprocating activities up and down in the vertical direction, and reciprocating circular motion at a certain angle in the horizontal direction, making the moving distance, position and angle of the hose 4 all change, increasing the contact reaction between the sulfuric acid tail gas and the ammonia water, and ensuring the recovery efficiency of sulfur dioxide.

[0020] A first support plate 11 and a second support plate 12 are fixedly connected to the middle of the limit frame 8. The end of the second support plate 12 is in pressing fit with the movable ring plate 3. The end of the second support plate 12 presses against the movable ring plate 3, but the end of the second support plate 12 does not affect the rotation of the movable ring plate 3. The self-rotating rod 15 that rotates with the first support plate 11 presses against the movable ring plate 3 and does not affect the rotation of the movable ring plate 3, so that the activities of the first support plate 11 and the second support plate 12 drive the movable ring plate 3 to reciprocate horizontally; The limiting member includes a fixing plate 13 fixedly connected to the intake pipe 2. A sleeve 14 that is slidably matched with the second support plate 12 is fixedly connected to the top of the fixing plate 13. The intake pipe 2 is a rigid intake pipe 2. Due to the limitation of the fixing plate 13 and the sleeve 14, the first support plate 11, the second support plate 12 and the limit frame 8 move at the same horizontal height and cannot perform vertical height change movements.

[0021] Explanation of the reciprocating movement of the first support plate 11 and the second support plate 12 at the same horizontal height in the horizontal direction: It also includes a self-rotating rod 15 rotatably connected to the first support plate 11. One end of the self-rotating rod 15 is fixedly connected to the rotating plate 9, and the other end passes through the limit frame 8 and is fixedly connected to a helical gear 16. The end of the rotating plate 7 is rotatably connected to an inclined tooth plate 17 that meshes with the helical gear 16, and the inclined tooth plate 17 slides within the limit frame 8.

[0022] The motor 22 is fixed on the outer surface of the tower body 1. The output shaft of the motor 22 passes into the tower body 1 and is fixedly connected to the stirring member 6. The stirring member 6 rotates in place, driving the rotating plate 7 to make a circular motion, so that the inclined tooth plate 17 makes a circular motion. Due to the action of the limiting member, the inclined limit frame 8 is driven to move horizontally, and the inclined tooth plate 17 makes an adaptive slide within the limit frame 8. The first support plate 11 and the second support plate 12 synchronously make reciprocating movements at the same horizontal height in the horizontal direction, thereby driving the movable ring plate 3 to make a reciprocating movement in the horizontal direction; Principle of the reciprocating rotation of the rotating plate 9 on the first support plate 11: The other end passes through the limit frame 8 and is fixedly connected to the helical gear 16. The end of the rotating plate 7 is rotatably connected to an inclined tooth plate 17 that meshes with the helical gear 16. By the reciprocating slide of the inclined tooth plate 17 within the limit frame 8, the inclined tooth plate 17 contacts the helical gear 16, so that the helical gear 16 rotates on the first support plate 11, the self-rotating rod 15 rotates on the first support plate 11, and the rotating plate 9 reciprocates on the first support plate 11; Wherein, both ends of the inclined tooth plate 17 are smooth plates, which is convenient for the sliding inclined tooth plate 17 to mesh with the helical gear 16 and drive the helical gear 16 to rotate.

[0023] Regarding the implementation method in which the rotating plate 9 drives the movable ring plate 3 to move vertically up and down while driving the movable ring plate 3 to make a reciprocating rotation at a certain angle: The end of the self-rotating rod 15 extends out of the central axis of the rotating plate 9. An inclined limiting slide plate 18 is fixedly connected to the inner wall of the movable ring plate 3, and the inclination angle of the limiting slide plate 18 is consistent with the inclination angles of the multiple fixed columns 10; The rotating rotating plate 9 meshes with the multiple fixed columns 10, and the multiple fixed columns 10 make a circular motion, so that the movable ring plate 3 makes a circular motion. And because the multiple fixed columns 10 are arranged at an inclined angle, the movable ring plate 3 moves up and down synchronously; Cooperating with the clamping of the limiting slide plate 18 with the same inclination angle, the stability of the reciprocating up and down movement of the movable ring plate 3 is ensured; Among them, the side of the rotating plate 9 close to the inner wall of the movable ring plate 3 is arc-shaped, and the rotating plate 9 is far away from the limiting slide plate 18 to avoid the rotating plate 9 touching the movable ring plate 3 and the limiting slide plate 18 when the rotating plate 9 rotates.

[0024] Explanation for further ensuring the stable meshing of the rotating plate 9 and the fixed column 10: A connecting plate 20 is fixedly connected to the bottom of the first support plate 11. A pressing plate 21 that is slidably matched with the limiting slide plate 18 is fixedly connected to the connecting plate 20. The top of the pressing plate 21 has an angle consistent with the inclination angle of the limiting slide plate 18. Through the pressing of the bottom surface of the limiting slide plate 18 by the pressing plate 21 and the pressing of the top surface of the limiting slide plate 18 by the self-rotating rod 15, the rotating plate 9 and the fixed column 10 maintain a stable meshing relationship.

[0025] The connecting plate 20 far away from the rotating plate 9 is L-shaped to avoid the connecting plate 20 touching the connecting plate 20. The pressing plate 21 is of a T-shaped structure, increasing the contact surface between the pressing plate 21 and the limiting slide plate 18, and further ensuring the meshing of the rotating plate 9 and the fixed column 10.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas, comprising: A tower body (1) filled with ammonia water, and an air inlet pipe (2) is arranged inside the tower body (1). It is characterized in that it further includes: multiple high-efficiency activated carbon layers are installed inside the air inlet pipe (2), a movable ring plate (3) is movably arranged inside the tower body (1), a plurality of loose hoses (4) are communicated between the movable ring plate (3) and the air inlet pipe (2), air-permeable holes (5) are formed in both the hoses (4) and the movable ring plate (3), a stirring member (6) is driven to rotate inside the tower body (1), a rotating plate (7) is fixedly connected to the bottom end of the stirring member (6), a limiting frame (8) distributed obliquely is slidably matched inside the tower body (1) through a limiting member, and a sliding member is arranged between the limiting frame (8) and the rotating plate (7). A rotating plate (9) rotated by the sliding member, and a plurality of fixed columns (10) arranged obliquely are fixedly connected to the inner wall of the movable ring plate (3), and the rotating plate (9) is meshed and matched with the plurality of fixed columns (10).

2. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 1, characterized in that: A first support plate (11) and a second support plate (12) are fixedly connected to the middle of the limiting frame (8), and the end of the second support plate (12) is in pressing fit with the movable ring plate (3).

3. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 2, characterized in that: The limiting member includes a fixing plate (13) fixedly connected to the air inlet pipe (2), a sleeve (14) slidably matched with the second support plate (12) is fixedly connected to the top of the fixing plate (13), and the air inlet pipe (2) is a rigid air inlet pipe (2).

4. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 2, wherein: The sliding member includes a self-rotating rod (15) rotatably connected to the first support plate (11), one end of the self-rotating rod (15) is fixedly connected to the rotating plate (9), the other end penetrates into the limiting frame (8) and is fixedly connected with a helical gear (16), an inclined toothed plate (17) meshed with the helical gear (16) is rotatably connected to the end of the rotating plate (7), and the inclined toothed plate (17) slides inside the limiting frame (8).

5. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 4, characterized in that: The end of the self-rotating rod (15) extends out of the central axis of the rotating plate (9), a limiting sliding plate (18) distributed obliquely is fixedly connected to the inner wall of the movable ring plate (3), and the inclination angle of the limiting sliding plate (18) is consistent with the inclination angle of the plurality of fixed columns (10).

6. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 5, characterized in that: A plurality of fitting grooves (19) meshed with the fixed columns (10) are formed at the edge of the rotating plate (9), the side surface of the rotating plate (9) close to the inner wall of the movable ring plate (3) is arc-shaped, and the rotating plate (9) is away from the limiting sliding plate (18).

7. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 6, characterized in that: A connecting plate (20) is fixedly connected to the bottom of the first support plate (11), a pressing plate (21) slidably matched with the limiting sliding plate (18) is fixedly connected to the connecting plate (20), and the top of the pressing plate (21) is at an angle consistent with the inclination angle of the limiting sliding plate (18).

8. The sulfur dioxide recovery desulfurization tower for sulfuric acid tail gas according to claim 7, characterized in that: The connecting plate (20) away from the rotating plate (9) is in an L shape, and the pressing plate (21) is in a T-shaped structure.

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