Conversion absorption tower of waste sulfuric acid device

Abstract

The utility model relates to the field of absorption towers, in particular to a waste sulfuric acid device conversion absorption tower which comprises a tower body, an air inlet pipe, two liquid collection boxes and three liquid sprayers, the liquid collection boxes are fixedly installed in the tower body, the two liquid collection boxes are vertically distributed, and the three liquid sprayers are vertically arranged in the tower body. The waste gas entering the tower body firstly passes through the solution in the liquid collecting box, so that chlorine is dissolved in the solution, part of chlorides can also be dissolved in the solution, sodium hydroxide in the solution can react with acidic substances, namely, the waste gas is pretreated, and the chlorides entering a subsequent absorption device are reduced. And diffusion of acid gas in the tower body can be reduced, so that the absorption tower is protected. The liquid collecting box is of a ceramic structure and can be used for a long time, the solution in the liquid collecting box is supplemented through the liquid sprayer, control over equipment is reduced, and the overflowed solution can flow to the bottom of the tower body to be recycled.

Description

Technical Field

[0001] The utility model relates to the field of absorption towers, in particular to a conversion absorption tower for a waste sulfuric acid device. Background Art

[0002] When treating the waste sulfuric acid of organic matter, it needs to go through primary filtration, cooling extraction, secondary filtration, tertiary filtration, and high-temperature concentration; the primary filtration is to dilute the waste sulfuric acid and then filter to remove the insoluble solid impurities to obtain the waste sulfuric acid filtered once; the cooling extraction is to cool and extract the waste sulfuric acid filtered once to remove quinoline, and take the upper liquid to obtain the waste sulfuric acid cooled and extracted; the secondary filtration is to add zinc hydroxide to the waste sulfuric acid cooled and extracted and then filter to obtain the waste sulfuric acid filtered twice and the coarse iron hydroxide; the tertiary filtration is to pass chlorine into the waste sulfuric acid filtered twice and then filter to obtain the waste sulfuric acid filtered three times and zinc chloride pyridinium salt; the high-temperature concentration is to add concentrated sulfuric acid to the waste sulfuric acid filtered three times and then concentrate at high temperature to obtain the treated sulfuric acid, and the tail gas is treated by hot alkali solution spraying. The pollutants in the tail gas are often chlorides, and these chlorides are acidic, and there will be residual chlorine in the tail gas, which will also become acidic when it meets water. When the traditional absorption tower continues to treat this tail gas, it will be easily corroded, and long-term corrosion will cause the absorption tower to calcify and be damaged. In addition, traditional absorption towers have poor chloride treatment effects, causing some chlorides to enter subsequent absorption devices, increasing the cost of waste gas recovery. Utility Model Content

[0003] The utility model aims to provide a conversion absorption tower for a waste sulfuric acid device.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] Provided is a conversion absorption tower for a waste sulfuric acid device, comprising a tower body, an air inlet pipe, two liquid collecting boxes and three liquid sprayers. The liquid collecting boxes are fixedly installed in the tower body, and the two liquid collecting boxes are vertically distributed. The three liquid sprayers are vertically arranged in the tower body, and one of the liquid sprayers is located between the two liquid collecting boxes, and the other two liquid sprayers are located above the topmost liquid collecting box. The three liquid collecting boxes are connected to a liquid supply mechanism through a liquid receiving pipe, the air inlet pipe penetrates into the tower body, and the air outlet of the air inlet pipe contacts with the solution in the liquid collecting box, the top of the tower body is provided with an air outlet 1, the bottom of the tower body is provided with a liquid discharge port, and the liquid discharge port is connected to a liquid return mechanism.

[0006] Furthermore, the liquid collecting box adopts a ceramic structure, and the liquid collecting box is an annular structure, and the middle part of the liquid collecting box is for the air intake pipe to pass through.

[0007] Furthermore, a liquid outlet pipe is provided at the bottom of the liquid collecting box, the top of the liquid outlet pipe is connected to the inside of the liquid collecting box, the bottom of the liquid outlet pipe passes through the outer wall of the tower body, a solenoid valve is provided at the bottom of the liquid outlet pipe, and a value detection sensor is provided inside the liquid collecting box. The value detection sensor is used to detect the value of the solution in the liquid collecting box, and the value detection sensor is connected to the controller through a signal line.

[0008] Furthermore, the air inlet pipe includes an L-shaped elbow and two air guide ring pipes. The vertical portion of the L-shaped elbow is inserted in the middle of the liquid collecting box, and the horizontal portion of the L-shaped elbow passes through the outside of the tower body and is connected to the air source. The two air guide ring pipes are respectively immersed in the solutions of the two liquid collecting boxes. A plurality of air outlets are provided on the outer edge of each air guide ring pipe, and the top of the air guide ring pipe is connected to the inside of the L-shaped elbow through a elbow.

[0009] Furthermore, the sprayer includes a main pipeline and multiple branch pipelines, the multiple branch pipelines are all connected to the interior of the main pipeline, multiple nozzles are arranged at the bottom of each branch pipeline, the middle part of the main pipeline is a "mouth" shaped structure, and the L-shaped elbow passes through the middle part of the "mouth" shaped structure.

[0010] Furthermore, an inspection port is fixedly provided on the tower body, an inspection cover is provided on the inspection port, a connecting pipe is provided in the middle of the inspection cover, one end of the connecting pipe is connected to the main pipeline, and the other end of the connecting pipe is connected to the liquid receiving pipe.

[0011] The beneficial effects of the utility model are as follows: the waste sulfuric acid device transforms the absorption tower, and the waste gas entering the tower body first passes through the solution in the liquid collecting box, so that the chlorine gas is dissolved in the solution, and part of the chloride can also be dissolved in the solution, so that the sodium hydroxide in the solution can react with the acidic substance, that is, the waste gas is pre-treated, the waste gas recovery effect is increased, and the chloride entering the subsequent absorption device is reduced. It can also reduce the diffusion of acidic gas in the tower body and protect the absorption tower. The liquid collecting box adopts a ceramic structure and can be used for a long time, and the solution in the liquid collecting box is supplemented by a liquid sprayer, which reduces the control of the equipment, and the overflowed solution can flow to the bottom of the tower body for recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment of the utility model.

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 is a perspective view of the utility model;

[0015] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0016] Figure 4 is a schematic diagram of the three-dimensional structure of the intake pipe;

[0017] Figure 5 is a schematic diagram of the three-dimensional structure of the liquid sprayer;

[0018] In the figure: 1, tower body; 1a, air outlet 1; 1b, inspection port; 1c, liquid discharge port; 2, liquid sprayer; 2a, main pipeline; 2b, branch pipeline; 2c, nozzle; 3, liquid collecting box; 3a, liquid outlet pipe; 4, liquid receiving pipe; 5, air inlet pipe; 5a, L-shaped elbow; 5b, air guide ring pipe; 5b1, air outlet 2; 6, solenoid valve; 7, inspection cover; 7a, connecting pipe. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0020] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0021] Reference Figures 1 to 5 A conversion absorption tower for a waste sulfuric acid device shown in the figure includes a tower body 1, an air inlet pipe 5, two liquid collecting boxes 3 and three liquid sprayers 2. The liquid collecting box 3 is fixedly installed in the tower body 1, and the two liquid collecting boxes 3 are vertically distributed. The three liquid sprayers 2 are vertically arranged in the tower body 1, and one of the liquid sprayers 2 is located between the two liquid collecting boxes 3, and the other two liquid sprayers 2 are located above the top liquid collecting box 3. The three liquid collecting boxes 3 are connected to the liquid supply mechanism through the liquid receiving pipe 4. The liquid supply mechanism is not shown in the figure. The liquid supply mechanism is used to transport the sodium hydroxide solution containing a mass fraction of 20 to 30% into the liquid receiving pipe 4, and then verify the liquid sprayer 2 to spray through the liquid receiving pipe 4. The sprayed liquid sprayer 2 can neutralize the chloride in the gas with acid and alkali. The air inlet pipe 5 penetrates into the tower body 1, and the air outlet of the air inlet pipe 5 contacts the solution in the liquid collecting box 3, so that after the gas enters the tower body 1, it first contacts the solution, so that the chlorine in the gas can be dissolved in the water, and then chloride is generated, and the chloride is neutralized with sodium hydroxide. This method can improve the purification effect of the absorption tower. The top of the tower body 1 is provided with an air outlet 1a, and the purified gas can be discharged along the air outlet 1a. The bottom of the tower body 1 is provided with a drain port 1c, and the drain port 1c is connected to the liquid return mechanism. The liquid return mechanism is not shown in the figure, and the solution discharged along the drain port 1c will be drawn away by the liquid return mechanism. A transfer box is provided between the liquid return mechanism and the liquid supply mechanism, so that the liquid drawn away by the liquid return mechanism will be sprayed out again by the liquid supply mechanism to realize the circulation of the solution. Among them, the transfer box can be supplemented with sodium hydroxide solution by workers.

[0022] The liquid collecting box 3 is of a ceramic structure and is an annular structure. The middle of the liquid collecting box 3 is for the air intake pipe 5 to pass through. Since chloride is corrosive, the liquid collecting box 3 can be replaced without ceramics, thereby increasing the service life of the liquid collecting box 3.

[0023] A liquid outlet pipe 3a is provided at the bottom of the liquid collecting box 3, the top of the liquid outlet pipe 3a is connected to the inside of the liquid collecting box 3, the bottom of the liquid outlet pipe 3a passes through the outer wall of the tower body 1, and a solenoid valve 6 is provided at the bottom of the liquid outlet pipe 3a. A PH value detection sensor is provided inside the liquid collecting box 3. The PH value detection sensor is used to detect the PH value of the solution in the liquid collecting box 3. The PH value detection sensor is connected to the controller through a signal line. The PH value detection sensor is not shown in the figure. When the PH value detection sensor detects that the PH value is 7-8, it will transmit a signal to the controller, and the controller will control the solenoid valve 6 to open, and the solution in the liquid collecting box 3 will be discharged outward along the liquid outlet pipe 3a and the solenoid valve 6.

[0024] The air inlet pipe 5 includes an L-shaped elbow 5a and two air guide ring pipes 5b. The vertical part of the L-shaped elbow 5a is inserted in the middle of the liquid collecting box 3. The horizontal part of the L-shaped elbow 5a passes through the outside of the tower body 1 and is connected to the gas source. The two air guide ring pipes 5b are immersed in the solutions of the two liquid collecting boxes 3 respectively. A plurality of air outlets 5b1 are arranged on the outer edge of each air guide ring pipe 5b. The top of the air guide ring pipe 5b is connected to the inside of the L-shaped elbow 5a through the elbow. The L-shaped elbow 5a is inflated, and the air outlet 5b1 on the air guide ring pipe 5b is finally verified to be discharged, so that the exhaust gas can first contact the solution in the liquid collecting box 3. The plurality of air outlets 5b1 make the exhaust more uniform, ensuring that the gas can be more uniform when it diffuses upward from the liquid in the liquid collecting box 3.

[0025] The liquid sprayer 2 includes a main pipeline 2a and a plurality of branch pipelines 2b, the plurality of branch pipelines 2b are connected to the inside of the main pipeline 2a, a plurality of nozzles 2c are arranged at the bottom of each branch pipeline 2b, the middle of the main pipeline 2a is a "mouth" shaped structure, and the L-shaped elbow 5a passes through the middle of the "mouth" shaped structure. Through this structural arrangement, the L-shaped elbow 5a can be located at the center. The liquid discharged along the main pipeline 2a will be dispersed along the branch pipeline 2b, and finally sprayed along the nozzle 2c, and the solution sprayed by the nozzle 2c is in a diffused state.

[0026] The tower body 1 is fixedly provided with an inspection port 1b, and an inspection cover 7 is provided on the inspection port 1b. A connecting pipe 7a is provided in the middle of the inspection cover 7. One end of the connecting pipe 7a is connected to the main pipeline 2a, and the other end of the connecting pipe 7a is connected to the liquid receiving pipe 4. The liquid discharged along the liquid receiving pipe 4 will enter the connecting pipe 7a, and then enter the main pipeline 2a along the connecting pipe 7a. By providing the connecting pipe 7a, the installation and replacement of the main pipeline 2a are made easier.

[0027] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waste sulfuric acid conversion absorption tower, characterized in that: The tower body (1) comprises a tower body (1), an air inlet pipe (5), two liquid collecting boxes (3) and three liquid sprayers (2). The liquid collecting boxes (3) are fixedly installed in the tower body (1), and the two liquid collecting boxes (3) are vertically distributed. The three liquid sprayers (2) are vertically arranged in the tower body (1), and one of the liquid sprayers (2) is located between the two liquid collecting boxes (3), and the other two liquid sprayers (2) are located above the topmost liquid collecting box (3). The three liquid collecting boxes (3) are connected to a liquid supply mechanism via a liquid receiving pipe (4). The air inlet pipe (5) penetrates into the tower body (1), and the air outlet of the air inlet pipe (5) contacts the solution in the liquid collecting box (3). The top of the tower body (1) is provided with an air outlet 1 (1a), and the bottom of the tower body (1) is provided with a liquid discharge port (1c), and the liquid discharge port (1c) is connected to the liquid return mechanism.

2. A waste sulfuric acid conversion absorption tower according to claim 1, characterized in that: The liquid collecting box (3) adopts a ceramic structure and is an annular structure. The middle part of the liquid collecting box (3) is used for the air intake pipe (5) to pass through.

3. A waste sulfuric acid conversion absorption tower as claimed in claim 2, characterized in that: A liquid outlet pipe (3a) is arranged at the bottom of the liquid collecting box (3); the top of the liquid outlet pipe (3a) is connected to the inside of the liquid collecting box (3); the bottom of the liquid outlet pipe (3a) passes through the outer wall of the tower body (1); a solenoid valve (6) is arranged at the bottom of the liquid outlet pipe (3a); a pH value detection sensor is arranged inside the liquid collecting box (3); the pH value detection sensor is used to detect the pH value of the solution in the liquid collecting box (3); and the pH value detection sensor is connected to the controller via a signal line.

4. A waste sulfuric acid conversion absorption tower as claimed in claim 3, characterized in that: The air inlet pipe (5) comprises an L-shaped curved pipe (5a) and two air guide ring pipes (5b); the vertical portion of the L-shaped curved pipe (5a) is inserted into the middle of the liquid collecting box (3); the horizontal portion of the L-shaped curved pipe (5a) passes through the outside of the tower body (1) and is connected to the air source; the two air guide ring pipes (5b) are respectively immersed in the solutions of the two liquid collecting boxes (3); a plurality of air outlets (5b1) are arranged on the outer edge of each air guide ring pipe (5b); and the top of the air guide ring pipe (5b) is connected to the inside of the L-shaped curved pipe (5a) through a curved pipe.

5. A waste sulfuric acid conversion absorption tower as claimed in claim 4, characterized in that: The liquid sprayer (2) comprises a main pipeline (2a) and a plurality of branch pipelines (2b); the plurality of branch pipelines (2b) are all connected to the interior of the main pipeline (2a); a plurality of spray heads (2c) are arranged at the bottom of each branch pipeline (2b); the middle portion of the main pipeline (2a) is a "mouth"-shaped structure; and the L-shaped elbow (5a) passes through the middle portion of the "mouth"-shaped structure.

6. A waste sulfuric acid conversion absorption tower as claimed in claim 5, characterized in that: An inspection port (1b) is fixedly provided on the tower body (1), an inspection cover (7) is provided on the inspection port (1b), a connecting pipe (7a) is provided in the middle of the inspection cover (7), one end of the connecting pipe (7a) is connected to the main pipeline (2a), and the other end of the connecting pipe (7a) is connected to the liquid receiving pipe (4).

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