Tail gas recovery device for acid making

Abstract

The utility model discloses a tail gas recovery device for acid making, which belongs to the technical field of tail gas recovery for acid making and comprises a tower body, a pump body mounted on the outer side of the tower body, a liquid pipe fixed at the output end of the pump body, a mounting ring fixed on the inner side wall of the tower body, an annular pipe mounted inside the mounting ring, and the outer side of the annular pipe is communicated with the top end of the liquid pipe. Spraying heads are evenly arranged in the mounting ring, one end of each spraying head penetrates through and extends to be communicated with the annular pipe, and an outer gear ring is rotationally mounted at the top of the mounting ring. According to the tail gas purification device, tail gas can be purified through a circular water mist net formed by spraying of the spraying heads annularly and evenly installed on the side wall, the direct contact area of the tail gas and the spraying heads is reduced while the tail gas is purified, and when the tail gas purification device is not used, outlets of the spraying heads are shielded and protected through the baffles; the corrosion of the acid-making tail gas to the spraying head is reduced, so that the protection effect of the tail gas recovery device for acid making is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas recovery for acid production, in particular to a tail gas recovery device for acid production. Background Art

[0002] During the sulfur melting process, the air in the quick-melting tank and crude sulfur tank is heated and rises, carrying with it a small amount of sulfur vapor formed during the sulfur melting process, water vapor from the evaporation of water contained in the solid sulfur, and acidic gases such as sulfur dioxide generated during the sulfur melting process. These gases have a strong pungent odor. Because the amount is small, they are currently discharged directly through the chimney during the production process, resulting in poor on-site environment. The exhaust gas needs to be treated and recovered by an acid production exhaust gas recovery unit. Acid production exhaust gas recovery typically includes the following main steps: 1. Exhaust gas collection: Exhaust gas is collected from various stages of the acid production process and transported to the recovery unit through a pipeline system. 2. Preliminary treatment: Dust removal: Dust collectors (such as cyclones and bag filters) are used to remove solid particles from the exhaust gas to prevent wear and blockage of subsequent processing equipment. Cooling: Heat exchangers or spray cooling are used to reduce the exhaust gas temperature to a range suitable for subsequent processing. 3. Purification fluid preparation: The appropriate purification fluid is selected based on the exhaust gas composition and treatment requirements. Common purification solutions include alkaline solutions (such as sodium hydroxide solution and aqueous ammonia) and oxidant solutions (such as hydrogen peroxide solution). Fourth, the purification solution contacts the exhaust gas. Spray towers, packed towers, and other equipment can be used to ensure that the purification solution contacts the exhaust gas through spraying or countercurrent flow. During this contact process, the active ingredients in the purification solution chemically react or physically adsorb with harmful substances in the exhaust gas, thereby removing the harmful substances. For example, the alkaline solution can neutralize the acidic components in the exhaust gas, while the oxidant can oxidize the reducing substances in the exhaust gas. Fifth, separation and recovery: After the contact treatment, the exhaust gas and purification solution mixture enters a separation device, such as a sedimentation tank, centrifuge, or filter, to separate the purified exhaust gas from the purification solution containing the reaction products. The purified exhaust gas can undergo further testing to ensure that it meets emission standards before being discharged. If necessary, further treatment, such as activated carbon adsorption, can be performed to improve the exhaust gas purification level. The purification solution containing the reaction products is recovered. Valuable substances such as sulfates and sulfites can be recovered through precipitation, crystallization, and evaporation. At the same time, the purified liquid is regenerated so that it can be recycled and the cost is reduced.

[0003] For example, the utility model with application number 202021710462.X discloses a molten sulfur tail gas treatment and recovery device for a sulfur-based acid production device. Based on theoretical calculations and usage experience, the exhaust fan is eliminated, and the exhaust gas from the molten sulfur tank can be extracted by utilizing the negative pressure in the washing tower, thereby reducing the power consumption of the entire device and the manpower consumption of cleaning the sulfur accumulated in the fan.

[0004] Similar to the above application, there are still some deficiencies:

[0005] The molten sulfur tail gas treatment and recovery device of this type of sulfur-based acid production unit will firstly experience localized tail gas concentration and high concentration when the tail gas produced by the acid production enters the scrubbing tower. The tail gas cannot fully contact with the purification liquid spray, resulting in a significant reduction in the tail gas treatment effect. Secondly, the tail gas from bottom to top will frequently contact with the spray head during the rising process, causing pollution and even corrosion to the spray head.

[0006] Therefore, a tail gas recovery device for acid production is designed to optimize the above problems. Utility Model Content

[0007] The main purpose of the utility model is to provide an acid-making tail gas recovery device, which can purify the tail gas by using a circular water mist net formed by spraying spray heads evenly installed in a ring shape on the side wall, thereby reducing the direct contact area between the tail gas and the spray head while purifying the tail gas, and using a baffle to shield and protect the outlet of the spray head when not in use, thereby reducing the corrosion of the spray head by the acid-making tail gas, thereby improving the protection effect of the acid-making tail gas recovery device.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A tail gas recovery device for acid production comprises a tower body, a pump body is installed on the outside of the tower body, a liquid pipe is fixed to the output end of the pump body, a mounting ring is fixed to the inner side wall of the tower body, an annular tube is installed inside the mounting ring, and the outer side of the annular tube is connected to the top of the liquid pipe, spray heads are evenly arranged inside the mounting ring, and one end of the spray heads passes through and extends to be connected to the annular tube, an outer gear ring is rotatably installed on the top of the mounting ring, a fixing ring is fixed inside the outer gear ring, and baffles are evenly arranged on the bottom of the fixing ring, a motor is installed on the outside of the tower body, a gear is fixed to the output shaft of the motor, and the gear is meshed with the outer gear ring, a through opening is opened at the connection between the tower body and the gear, an air inlet pipe is installed through one side of the tower body, and an evacuation mechanism is arranged inside the tower body and above the air inlet pipe.

[0010] Preferably, the evacuation mechanism includes a support ring and support rods. The support ring is located inside the tower body. Support rods are evenly arranged inside the support ring. An arc cover is fixed to the top of the support rod, and the arc cover is located above the top of the air inlet pipe.

[0011] Preferably, a mounting block is fixedly installed inside the tower body and at the bottom of the mounting ring, and a guide ring is installed at the end of the mounting block.

[0012] Preferably, a protective layer is provided on both the outer side and the inner side of the arc-shaped cover, and the protective layer is an anti-sticking protective layer.

[0013] Preferably, the air inlet pipe is an L-shaped pipe, and protective pads are provided on the outer sides of the baffles.

[0014] Preferably, a protective shell is provided on one side of the tower body and outside the motor, and a mounting bracket is provided at the bottom of the protective shell.

[0015] Preferably, the guide ring is a conical ring, and the diameter of the top of the guide ring is smaller than the inner diameter of the mounting ring.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides an acid-producing tail gas recovery device. Through the coordinated use of a tower body, a pump body, an air inlet pipe, a mounting ring, an annular pipe, a spray head, an outer gear ring, a fixing ring, a baffle, a motor, a gear, a through port, and a liquid pipe, the tail gas can be purified by utilizing a circular water mist net formed by spraying from a spray head evenly mounted in an annular shape on the side wall. While purifying the tail gas, the direct contact area between the tail gas and the spray head is reduced. When not in use, the baffle is used to shield and protect the outlet of the spray head, reducing corrosion of the spray head by the acid-producing tail gas, thereby improving the protective effect of the acid-producing tail gas recovery device.

[0018] The coordinated use of the support ring, support rod and arc cover allows the exhaust gas to be dispersed and then evenly contact the water mist net formed by the purification liquid, reducing the problem of purification liquid falling directly without contacting the exhaust gas and causing waste. This not only improves the exhaust gas treatment efficiency, but also reduces the waste of purification liquid.

[0019] By using the mounting block and the guide ring in conjunction, the guide ring at the bottom of the mounting block blocks the upstream exhaust gas, changes the upstream path of the exhaust gas, further reduces the direct contact of the exhaust gas with the spray port of the spray head, improves the protection of the spray head, and thus improves the practicality of the exhaust gas recovery device for acid production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front sectional view of the present utility model;

[0021] Figure 2 For the utility model Figure 1 A magnified view of the structure at center A;

[0022] Figure 3 This is a schematic diagram of the connection between the mounting ring and the fixing ring of the present invention;

[0023] Figure 4 This is a schematic diagram of the connection between the outer gear ring and the fixed ring of the present invention.

[0024] In the figure: 1. Tower body; 2. Pump body; 3. Air inlet pipe; 4. Mounting ring; 5. Annular pipe; 6. Spray head; 7. Outer gear ring; 8. Fixed ring; 9. Baffle; 10. Motor; 11. Gear; 12. Port; 13. Evacuation mechanism; 14. Liquid pipe; 15. Support ring; 16. Support rod; 17. Arc cover; 18. Mounting block; 19. Guide ring; 20. Protective shell. DETAILED DESCRIPTION

[0025] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is described in further detail below with reference to embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0026] like Figure 1-Figure 4 As shown, this embodiment provides an acid-making tail gas recovery device, including a tower body 1, a pump body 2 is installed on the outside of the tower body 1, a liquid pipe 14 is fixed to the output end of the pump body 2, a mounting ring 4 is fixed to the inner wall of the tower body 1, an annular tube 5 is installed inside the mounting ring 4, and the outer side of the annular tube 5 is connected to the top of the liquid pipe 14, spray heads 6 are evenly arranged inside the mounting ring 4, and one end of the spray head 6 passes through and extends to be connected to the annular tube 5, an outer gear ring 7 is rotatably installed on the top of the mounting ring 4, a fixing ring 8 is fixed inside the outer gear ring 7, and a baffle 9 is evenly arranged on the bottom of the fixing ring 8, a motor 10 is installed on the outside of the tower body 1, and one end of the tower body 1 A protective shell 20 is provided on the side and outside of the motor 10, and a mounting bracket is provided at the bottom of the protective shell 20. The protective shell 20 protects the motor 10 and the gear 11. The output shaft of the motor 10 is fixed with a gear 11, and the gear 11 is engaged with the outer gear ring 7. A through opening 12 is provided at the connection between the tower body 1 and the gear 11. An air intake pipe 3 is installed through one side of the tower body 1. The air intake pipe 3 is an L-shaped pipe. A protective pad is provided on the outside of the baffle 9. The protective pad moves with the baffle 9 to fit the end of the spray head 6 to protect the spray head 6 and reduce friction damage to the spray head 6. An evacuation mechanism 13 is provided inside the tower body 1 and above the air intake pipe 3.

[0027] Specifically, the tail gas for acid production is transported to the interior of the tower body 1 through the air inlet pipe 3, and flows from bottom to top to the position below the mounting ring 4. The pump body 2 is started so that the purified liquid is transported to the interior of the annular tube 5 through the liquid pipe 14, and the purified liquid is evenly sprayed to the inner ring of the mounting ring 4 through the spray head 6, forming a disc-shaped water mist net, so that the tail gas from bottom to top contacts the purified liquid. When not in use, the motor 10 is started to drive the gear 11 to rotate, and the gear 11 drives the outer gear ring 7, the fixed ring 8 and the baffle 9 to rotate, until the baffle 9 rotates to the end of the spray head 6, thereby protecting and shielding the end of the spray head 6.

[0028] like Figure 1As shown, the evacuation mechanism 13 includes a support ring 15 and a support rod 16. The support ring 15 is located inside the tower body 1. The support rods 16 are evenly arranged inside the support ring 15. An arc cover 17 is fixed to the top of the support rod 16, and the arc cover 17 is located above the top of the intake pipe 3. A protective layer is provided on the outside and inside of the arc cover 17, and the protective layer is an anti-sticking protective layer to reduce the adhesion and corrosion of the exhaust gas to the outside of the intake pipe 3.

[0029] Specifically, the exhaust gas is transported to the arc cover 17 through the intake pipe 3, so that the exhaust gas stays at the arc cover 17 and flows downward along the inner wall of the arc cover 17, and then flows upward through the gaps between the support rods 16. The exhaust gas is divided by the arc cover 17 and the support rods 16 and flows in all directions, and the dispersed exhaust gas contacts and reacts evenly with the purification liquid.

[0030] like Figure 1 and Figure 2 As shown, a mounting block 18 is fixed inside the tower body 1 and at the bottom of the mounting ring 4, and a guide ring 19 is installed at the end of the mounting block 18. The guide ring 19 is a conical ring, and the diameter of the top of the guide ring 19 is smaller than the diameter inside the mounting ring 4, so that the exhaust gas flows upward along the inside of the guide ring 19, and the diameter of the exhaust gas airflow column formed is smaller than the diameter of the mounting ring 4, thereby reducing the contact frequency of the exhaust gas with the spray head 6.

[0031] Specifically, the guide ring 19 at the bottom of the mounting block 18 blocks the upstream exhaust gas, changes the upstream path of the exhaust gas, further reduces the direct contact of the exhaust gas with the spray port of the spray head 6, and improves the protection of the spray head 6.

[0032] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present invention within the scope disclosed by the present invention, which falls within the protection scope of the present invention.

Claims

1. A tail gas recovery device for acid production, characterized by: The invention comprises a tower body (1), a pump body (2) is installed on the outside of the tower body (1), a liquid pipe (14) is fixed to the output end of the pump body (2), a mounting ring (4) is fixed to the inner wall of the tower body (1), an annular tube (5) is installed inside the mounting ring (4), and the outer side of the annular tube (5) is connected to the top of the liquid pipe (14), spray heads (6) are evenly arranged inside the mounting ring (4), and one end of the spray head (6) is penetrated and extended to be connected to the annular tube (5), and an outer gear ring (7) is rotatably installed on the top of the mounting ring (4). A fixing ring (8) is fixed inside the outer gear ring (7), and baffles (9) are evenly arranged at the bottom of the fixing ring (8). A motor (10) is installed on the outside of the tower body (1), and a gear (11) is fixed to the output shaft of the motor (10), and the gear (11) is meshed with the outer gear ring (7). A through opening (12) is provided at the connection between the tower body (1) and the gear (11), and an air intake pipe (3) is installed through one side of the tower body (1), and an evacuation mechanism (13) is provided inside the tower body (1) and above the air intake pipe (3).

2. The tail gas recovery device for acid production according to claim 1, characterized in that: The evacuation mechanism (13) comprises a support ring (15) and a support rod (16). The support ring (15) is located inside the tower body (1). The support rods (16) are evenly arranged inside the support ring (15). The top ends of the support rods (16) are fixed with arc-shaped covers (17), and the arc-shaped covers (17) are located above the top end of the air inlet pipe (3).

3. The tail gas recovery device for acid production according to claim 1, characterized in that: A mounting block (18) is fixedly installed inside the tower body (1) and at the bottom of the mounting ring (4), and a guide ring (19) is installed at the end of the mounting block (18).

4. The tail gas recovery device for acid production according to claim 2, characterized in that: The outer side and the inner side of the arc-shaped cover (17) are both provided with a protective layer, and the protective layer is an anti-sticking protective layer.

5. The tail gas recovery device for acid production according to claim 1, characterized in that: The air inlet pipe (3) is an L-shaped pipe, and the outer sides of the baffles (9) are all provided with protective pads.

6. The tail gas recovery device for acid production according to claim 1, characterized in that: A protective shell (20) is provided on one side of the tower body (1) and located outside the motor (10), and a mounting frame is provided at the bottom of the protective shell (20).

7. The tail gas recovery device for acid production according to claim 3, characterized in that: The guide ring (19) is a conical ring, and the diameter of the top of the guide ring (19) is smaller than the diameter of the inside of the mounting ring (4).

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