High-sulfur tail gas desulfurization tower with function of avoiding inner wall crystallization

Abstract

The utility model provides a high-sulfur tail gas desulfurization tower with a function of avoiding crystallization of an inner wall, which relates to the technical field of high-sulfur tail gas desulfurization and comprises a desulfurization tower body, and a pretreatment mechanism is arranged on the outer side of the desulfurization tower body; the pretreatment mechanism comprises a treatment box, the left side face of the treatment box fixedly communicates with a first air inlet pipe, the front face of the treatment box is fixedly connected with a bypass suction pump, and the power input end of the bypass suction pump penetrates through the treatment box and extends into the treatment box. According to the high-sulfur tail gas desulfurization tower with the function of avoiding crystallization of the inner wall, the water suction pump and the first multi-way spray pipe are arranged, water at the bottom of the treatment box can be pumped out by the water suction pump, and the water is re-guided into the treatment box through the first multi-way spray pipe to be sprayed; the tail gas contains a certain amount of sulfur trioxide, and the sulfur trioxide is extremely easy to react with water, so that dilute sulphuric acid can be efficiently formed, and the dilute sulphuric acid is neutralized by calcium oxide.

Description

Technical Field

[0001] This utility model relates to a desulfurization tower, specifically a high-sulfur tail gas desulfurization tower with the function of avoiding crystallization on the inner wall, belonging to the field of high-sulfur tail gas desulfurization technology. Background Technology

[0002] High-sulfur tail gas desulfurization refers to the removal of sulfides from tail gas through a series of technical means to reduce air pollution. This process is usually applied in the industrial field, especially in the process of burning sulfur-containing fuels, such as in thermal power plants and steel plants, to reduce the harm of sulfur dioxide to the environment. Desulfurization technology can be divided into different types such as dry method, wet method and semi-dry method.

[0003] Currently, while existing high-sulfur tail gas desulfurization towers can effectively desulfurize tail gas, they are prone to developing large amounts of hard, hydrated calcium sulfate crystals on their inner walls. These crystals are extremely difficult to break down, requiring a pneumatic pick, and can only operate normally for about a week, severely impacting production. The main reason is the severe lack of seed crystals during the reaction between the calcium hydroxide slurry and sulfur dioxide inside the tower. This causes calcium sulfate molecules to climb and grow rapidly, eventually forming hard calcium sulfate crystals, significantly affecting the unit's performance. Therefore, this paper proposes a high-sulfur tail gas desulfurization tower with a function to prevent inner wall crystal formation. Utility Model Content

[0004] This invention proposes a high-sulfur tail gas desulfurization tower with the function of preventing crystallization on the inner wall, in order to solve the problem that a large amount of hard calcium sulfate crystals easily form on the inner wall of the desulfurization tower in the prior art.

[0005] This utility model is achieved through the following technical solution: a high-sulfur tail gas desulfurization tower with the function of avoiding crystallization on the inner wall, including a desulfurization tower body, and a pretreatment mechanism is provided on the outside of the desulfurization tower body;

[0006] The pretreatment mechanism includes a treatment box, a first air inlet pipe fixedly connected to the left side of the treatment box, a rotary pump fixedly connected to the front of the treatment box, the input end of the rotary pump power passing through the treatment box and extending into the interior of the treatment box, the output end of the rotary pump power fixedly connected to a rotary pipe, the right end of the rotary pipe fixedly connected to the outer surface of the desulfurization tower body, a water pump fixedly connected to the front of the treatment box, the input end of the water pump power passing through the treatment box and extending into the interior of the treatment box, the output end of the water pump power fixedly connected to a first multi-way nozzle, the outer surface of the first multi-way nozzle fixedly connected to the inner wall of the treatment box, and a partition plate fixedly connected to the inner wall of the treatment box.

[0007] A connecting component is provided on the outside of the desulfurization tower body, and a desulfurization component is provided on the outside of the desulfurization tower body.

[0008] The connecting assembly includes a second air inlet pipe. The right end of the second air inlet pipe is fixedly connected to the outer surface of the desulfurization tower body. A docking cylinder is fixedly connected to the outer surface of the second air inlet pipe. An air outlet pipe is slidably connected to the inner wall of the docking cylinder. The left end of the air outlet pipe is fixedly connected to the right side of the treatment box. A first sealing gasket is fixedly connected to the left side of the second air inlet pipe. The left side of the first sealing gasket contacts the right side of the air outlet pipe. The outer surface of the first sealing gasket contacts the inner wall of the docking cylinder. Six bolts are threadedly connected to the inner wall of the second air inlet pipe. The left end of each bolt is threadedly connected to the inner wall of the air outlet pipe.

[0009] The desulfurization assembly includes a liquid pump, the outer surface of which is fixedly connected to the outer surface of the desulfurization tower body. The power input end of the liquid pump passes through the desulfurization tower body and extends into the interior of the desulfurization tower body. The power output end of the liquid pump is fixedly connected to a second multi-way nozzle, the outer surface of which is fixedly connected to the inner wall of the desulfurization tower body.

[0010] The bottom surface of the desulfurization tower body is fixedly connected to four first support legs, and the bottom surface of each first support leg is fixedly connected to a first base.

[0011] The bottom surface of the processing box is fixedly connected to four second support legs, and the bottom surface of each second support leg is fixedly connected to a second base. The inner wall of the processing box is slidably connected to a sealing cover.

[0012] A second sealing gasket is fixedly connected to the upper surface of the desulfurization tower body, and six positioning blocks are fixedly connected to the outer surface of the desulfurization tower body.

[0013] This invention provides a desulfurization tower for high-sulfur tail gas that prevents internal wall crystallization, and its beneficial effects are as follows:

[0014] 1. This high-sulfur tail gas desulfurization tower with the function of avoiding internal wall crystallization is equipped with a water pump and a first multi-way spray pipe. The water pump can extract water from the bottom of the treatment tank and redirect it back into the treatment tank for spraying through the first multi-way spray pipe. When the water is sprayed on the introduced tail gas, since the tail gas contains a certain amount of sulfur trioxide, which readily reacts with water, it can efficiently form dilute sulfuric acid. This dilute sulfuric acid is neutralized with calcium oxide, and the resulting calcium sulfate slurry is used as a seed crystal. It is injected into the desulfurization tower body through a transfer pump and transfer pipe to provide a template for calcium sulfate molecules, inducing them to grow in a directional manner on the seed crystal surface, thereby reducing calcium sulfate crystallization on the tower wall or in the equipment inside the tower.

[0015] 2. This high-sulfur tail gas desulfurization tower with the function of preventing internal wall crystallization can be easily connected to the desulfurization tower body by setting a second inlet pipe, connecting cylinder, outlet pipe, first sealing gasket and bolts, so as to facilitate pretreatment work and facilitate the transmission of tail gas, thereby helping to prevent internal wall crystallization. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the desulfurization tower body structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the processing box structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the processing box of this utility model;

[0019] Figure 4 This is a cross-sectional view of the docking cylinder of this utility model.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. Desulfurization tower body;

[0022] 2. Pretreatment mechanism; 201. Treatment box; 202. First air inlet pipe; 203. Transfer pump; 204. Transfer pipe; 205. Water pump; 206. First multi-way nozzle; 207. Divider plate;

[0023] 3. Connecting components; 301. Second air inlet pipe; 302. Connecting cylinder; 303. Air outlet pipe; 304. First sealing gasket; 305. Bolt;

[0024] 4. Desulfurization assembly; 401. Liquid pump; 402. Second multi-way nozzle;

[0025] 5. First support leg; 6. First base; 7. Second support leg; 8. Second base; 9. Second sealing gasket; 10. Positioning block; 11. Sealing cover. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0027] Please see Figures 1-4 This utility model embodiment provides a high-sulfur tail gas desulfurization tower with the function of avoiding crystallization on the inner wall, including a desulfurization tower body 1, and a pretreatment mechanism 2 is provided on the outside of the desulfurization tower body 1.

[0028] The pretreatment mechanism 2 includes a treatment box 201. A first air inlet pipe 202 is fixedly connected to the left side of the treatment box 201. A transfer pump 203 is fixedly connected to the front of the treatment box 201. Four first support legs 5 are fixedly connected to the bottom surface of the desulfurization tower body 1. A first base 6 is fixedly connected to the bottom surface of each first support leg 5. The four first support legs 5 on the bottom surface of the desulfurization tower body 1 provide stable support, enabling the desulfurization tower body 1 to stand stably. The first base 6 on the bottom surface of each first support leg 5 further increases the contact area with the ground, disperses the weight of the desulfurization tower body 1, reduces the pressure per unit area, and thus enhances the stability of the entire desulfurization tower body 1.

[0029] Please refer to this carefully. Figure 1 and Figure 2 The input end of the power transfer pump 203 passes through the treatment box 201 and extends into the interior of the treatment box 201. The output end of the power transfer pump 203 is fixedly connected to the transfer pipe 204. The right end of the transfer pipe 204 is fixedly connected to the outer surface of the desulfurization tower body 1. A water pump 205 is fixedly connected to the front of the treatment box 201. Four second support legs 7 are fixedly connected to the bottom of the treatment box 201. A second base 8 is fixedly connected to the bottom of each second support leg 7. A sealing cover 11 is slidably connected to the inner wall of the treatment box 201. The four second support legs 7 and the corresponding second base 8 on the bottom of the treatment box 201 play a role in stabilizing the treatment box 201. The sealing cover 11 slidably connected to the inner wall of the treatment box 201 facilitates maintenance and inspection of the interior of the treatment box 201. During normal operation, it can ensure the sealing of the interior of the treatment box 201. At the same time, it can also facilitate the addition of calcium oxide to dilute sulfuric acid for neutralization. The resulting calcium sulfate slurry is used as a seed crystal.

[0030] Please refer to this carefully. Figure 1 and Figure 3 The input end of the water pump 205 passes through the treatment box 201 and extends into the interior of the treatment box 201. The output end of the water pump 205 is fixedly connected to the first multi-way nozzle 206. The outer surface of the first multi-way nozzle 206 is fixedly connected to the inner wall of the treatment box 201. A partition plate 207 is fixedly connected to the inner wall of the treatment box 201. A second sealing gasket 9 is fixedly connected to the upper surface of the desulfurization tower body 1. Six positioning blocks 10 are fixedly connected to the outer surface of the desulfurization tower body 1. The second sealing gasket 9 on the upper surface of the desulfurization tower body 1 helps to ensure sealing when the top of the desulfurization tower body 1 is connected to other equipment or structures to prevent exhaust gas leakage. The six positioning blocks 10 on the outer surface of the desulfurization tower body 1 can be used for positioning during installation or combination with other equipment to improve the accuracy and efficiency of installation.

[0031] Please refer to this carefully. Figure 4A connecting assembly 3 is provided on the outer side of the desulfurization tower body 1. The connecting assembly 3 includes a second inlet pipe 301. The right end of the second inlet pipe 301 is fixedly connected to the outer surface of the desulfurization tower body 1. A docking cylinder 302 is fixedly connected to the outer surface of the second inlet pipe 301. An outlet pipe 303 is slidably connected to the inner wall of the docking cylinder 302. The left end of the outlet pipe 303 is fixedly connected to the right side of the treatment box 201. A first sealing gasket 304 is fixedly connected to the left side of the second inlet pipe 301. The left side of the first sealing gasket 304 contacts the right side of the outlet pipe 303. The outer surface of the first sealing gasket 304 contacts the inner wall of the docking cylinder 302. The inner wall of the inlet pipe 301 is threaded with six bolts 305. The left end of each bolt 305 is threaded to the inner wall of the outlet pipe 303. This connection method ensures that the exhaust gas can be smoothly transmitted from the treatment box 201 to the desulfurization tower body 1. The setting of the docking cylinder 302 allows the outlet pipe 303 to be slidably connected to it, providing a flexible connection method that is easy to install and adjust. Because the bolts 305 are used for connection, when the connection component 3 needs to be maintained or repaired, the staff can easily remove the bolts 305, separate the outlet pipe 303 and the second inlet pipe 301, and then inspect, repair or replace the internal structure.

[0032] Please refer to this carefully. Figure 2 A desulfurization assembly 4 is provided on the outside of the desulfurization tower body 1. The desulfurization assembly 4 includes a liquid pump 401. The outer surface of the liquid pump 401 is fixedly connected to the outer surface of the desulfurization tower body 1. The power input end of the liquid pump 401 passes through the desulfurization tower body 1 and extends into the interior of the desulfurization tower body 1. The power output end of the liquid pump 401 is fixedly connected to a second multi-way nozzle 402. The outer surface of the second multi-way nozzle 402 is fixedly connected to the inner wall of the desulfurization tower body 1. This structural design allows the desulfurization liquid to be effectively extracted and sprayed into the interior of the desulfurization tower body 1 through the second multi-way nozzle 402. The fixed connection between the outer surface of the second multi-way nozzle 402 and the inner wall of the desulfurization tower body 1 ensures the uniformity of spraying, thereby increasing the contact area between the desulfurization liquid and the exhaust gas and enhancing the desulfurization effect.

[0033] In use, the operator first connects the device's transfer pump 203, water pump 205, liquid pump 401, and metering pump on the transfer pipe 204 to the power supply. Then, a specified amount of calcium hydroxide slurry is added to the desulfurization tower body 1 through the liquid inlet pipe for desulfurization. Subsequently, a specified amount of water is added to the treatment tank 201 through the water inlet pipe on the back of the treatment tank 201. Next, the operator connects the first air inlet pipe 202 on the treatment tank 201 to the external exhaust gas power transmission pipeline, and simultaneously turns on the water pump 205. 205 can extract water from the bottom of the treatment tank 201 and redirect it back into the treatment tank 201 for spraying through the first multi-port nozzle 206. When the water is sprayed onto the introduced exhaust gas, since the exhaust gas contains a certain amount of sulfur trioxide, which readily reacts with water to efficiently form dilute sulfuric acid. Because a fixed amount of water is added beforehand, the amount of dilute sulfuric acid produced after the water is drawn to the top of the treatment tank 201 and reacts with the sulfur trioxide can be calculated. After the dilute sulfuric acid is produced, the operator opens the sealing cover 11 and sprays water into the treatment tank 201. Adding a specified ratio of calcium oxide for neutralization, the resulting calcium sulfate slurry serves as a seed crystal. Since the amount of water needed to react with the amount of dilute sulfuric acid, and the amount of calcium oxide needed to neutralize the sulfuric acid to achieve a pH of approximately 4.5, can be calculated and controlled in advance. Furthermore, workers can use a pH meter to assist in pH measurement to avoid errors. Because the amount of material and the amount of substance produced can be calculated and proportioned before work begins, the data is generally accurate. The resulting calcium sulfate slurry accounts for approximately [percentage missing]% of the calcium hydroxide slurry at the bottom of the desulfurization tower body. 1.5. Staff can also calculate what 1.5% of the calcium hydroxide slurry is, and then turn on the transfer pipe 204 and the metering pump. The transfer pipe 204 can draw the calcium sulfate slurry inside the treatment tank 201 into the desulfurization tower body 1. The metering pump can detect the flow rate of the liquid. Staff can determine whether it is the pre-calculated value of 1.5% of the calcium hydroxide slurry. Then, the staff fixes the exhaust purification device on the top of the desulfurization tower body 1. Subsequently, when the exhaust gas is introduced into the desulfurization tower body 1, the staff turns on the liquid pump 401 to carry out the desulfurization work.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of inner wall, comprising a desulfurization tower body (1), characterized in that: A pretreatment mechanism (2) is provided on the outside of the desulfurization tower body (1); The pretreatment mechanism (2) includes a treatment box (201). A first air inlet pipe (202) is fixedly connected to the left side of the treatment box (201). A transfer pump (203) is fixedly connected to the front of the treatment box (201). The input end of the power of the transfer pump (203) passes through the treatment box (201) and extends into the interior of the treatment box (201). The output end of the power of the transfer pump (203) is fixedly connected to a transfer pipe (204). The right end of the transfer pipe (204) is connected to the desulfurization tower body (…). 1) The outer surface is fixedly connected, and a water pump (205) is fixedly connected to the front of the treatment box (201). The input end of the power of the water pump (205) passes through the treatment box (201) and extends into the interior of the treatment box (201). The output end of the power of the water pump (205) is fixedly connected to a first multi-way nozzle (206). The outer surface of the first multi-way nozzle (206) is fixedly connected to the inner wall of the treatment box (201). A partition plate (207) is fixedly connected to the inner wall of the treatment box (201). A connecting component (3) is provided on the outside of the desulfurization tower body (1), and a desulfurization component (4) is provided on the outside of the desulfurization tower body (1).

2. The high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of the inner wall according to claim 1, characterized in that: The connecting assembly (3) includes a second air inlet pipe (301), the right end of which is fixedly connected to the outer surface of the desulfurization tower body (1), a docking cylinder (302) is fixedly connected to the outer surface of the second air inlet pipe (301), an air outlet pipe (303) is slidably connected to the inner wall of the docking cylinder (302), the left end of the air outlet pipe (303) is fixedly connected to the right side of the treatment box (201), a first sealing gasket (304) is fixedly connected to the left side of the second air inlet pipe (301), the left side of the first sealing gasket (304) is in contact with the right side of the air outlet pipe (303), the outer surface of the first sealing gasket (304) is in contact with the inner wall of the docking cylinder (302), and six bolts (305) are threadedly connected to the inner wall of the second air inlet pipe (301), the left end of each bolt (305) is threadedly connected to the inner wall of the air outlet pipe (303).

3. The high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of the inner wall according to claim 1, characterized in that: The desulfurization assembly (4) includes a liquid pump (401), the outer surface of which is fixedly connected to the outer surface of the desulfurization tower body (1). The power input end of the liquid pump (401) passes through the desulfurization tower body (1) and extends into the interior of the desulfurization tower body (1). The power output end of the liquid pump (401) is fixedly connected to a second multi-way nozzle (402), the outer surface of which is fixedly connected to the inner wall of the desulfurization tower body (1).

4. The high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of the inner wall according to claim 1, characterized in that: The bottom surface of the desulfurization tower body (1) is fixedly connected with four first support legs (5), and the bottom surface of each first support leg (5) is fixedly connected with a first base (6).

5. The high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of the inner wall according to claim 1, characterized in that: The bottom surface of the processing box (201) is fixedly connected with four second support legs (7), and the bottom surface of each second support leg (7) is fixedly connected with a second base (8). The inner wall of the processing box (201) is slidably connected with a sealing cover (11).

6. The high-sulfur tail gas desulfurization tower with the function of avoiding the crystallization of inner wall according to claim 1, characterized in that: The upper surface of the desulfurization tower body (1) is fixedly connected with a second sealing gasket (9), and the outer surface of the desulfurization tower body (1) is fixedly connected with six positioning blocks (10).

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