Phosphoric acid tail gas treatment equipment

Abstract

The utility model relates to the field of waste gas treatment, and discloses phosphoric acid tail gas treatment equipment which comprises an inlet water seal, an alternate treatment assembly is installed at the top of the inlet water seal, an overhaul assembly is installed in the alternate treatment assembly, and the alternate treatment assembly comprises two gas inlet pipes. The left side of the air inlet pipe is fixedly connected to the output end of the inlet water seal, the outside of the air inlet pipe is fixedly connected with a first valve, the right side of the air inlet pipe is fixedly connected with a treatment body, the output end of the treatment body is fixedly connected with an air outlet pipe, and the outside of the air outlet pipe is fixedly connected with a second valve. According to the utility model, by adopting a one-use and one-standby mode, when one treatment body works, flue gas enters the treatment body through the inlet water seal and the gas inlet pipe for purification treatment, when flushing is needed, the valve I on the gas inlet pipe is used for controlling and switching to the other treatment body for normal work, and the two devices are operated alternately without shutdown, so that the flushing efficiency is improved. The working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment, in particular to phosphoric acid tail gas treatment equipment. Background Art

[0002] Phosphoric acid tail gas treatment is an important environmental protection measure in the wet-process phosphoric acid production process. During the wet-process phosphoric acid production process, fluorine-containing gases, sulfur dioxide, ammonia and some acidic gases will be discharged with the tail gas, causing pollution to the atmospheric environment and harming human health. The treatment of phosphoric acid tail gas is particularly important. Common phosphoric acid tail gas treatment methods include absorption, adsorption, chemical reaction and condensation. The absorption method uses alkaline solution to absorb harmful gases in the tail gas, and neutralizes or removes the harmful components through chemical reaction. It is widely used for the removal of fluoride and sulfur dioxide.

[0003] The adsorption method uses activated carbon, zeolite and other adsorbents to absorb harmful components in the exhaust gas, and is particularly suitable for the treatment of ammonia, fluoride, etc. The chemical reaction method treats the acidic gas in the exhaust gas by chemically reacting with the reactant to generate harmless substances. The condensation method uses temperature changes to condense the moisture and harmful gases in the exhaust gas to achieve a purification effect. In order to improve the exhaust gas treatment effect, multi-stage purification technology can also be used to combine different treatment methods. Through strict exhaust gas treatment, it can not only effectively reduce air pollution, but also achieve resource recycling and utilization, which is conducive to the sustainable development of the phosphoric acid industry.

[0004] Among them, wet electrostatic precipitator is a common waste gas treatment method. It charges the particles in the airflow through the electric field, and then captures and adsorbs the particles into the liquid through the collision of the electric field force and the liquid spray, thereby achieving the effect of purifying the gas. After using it for a period of time, the internally adsorbed substances need to be flushed. However, during the traditional treatment method, the wet electrostatic precipitator needs to be shut down and the waste gas treatment needs to be suspended, which will affect the treatment efficiency and prolong the treatment time. Therefore, a phosphoric acid tail gas treatment equipment is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a phosphoric acid tail gas treatment device, which aims to improve the problem that in the traditional treatment method, the wet electrostatic precipitator needs to be shut down and the exhaust gas treatment needs to be suspended, which will affect the treatment efficiency and prolong the treatment time.

[0006] In order to achieve the above object, the utility model adopts the following technical solution: a phosphoric acid tail gas treatment device, comprising an inlet water seal, an alternating treatment component installed on the top of the inlet water seal, and an inspection component installed inside the alternating treatment component;

[0007] The alternating treatment component includes two air inlet pipes, the left side of the air inlet pipe is fixedly connected to the output end of the inlet water seal, the outside of the air inlet pipe is fixedly connected to valve one, the right side of the air inlet pipe is fixedly connected to the treatment body, the output end of the treatment body is fixedly connected to the air outlet pipe, the outside of the air outlet pipe is fixedly connected to valve two, an outlet water seal is fixedly connected between the output ends of the two air outlet pipes, the bottom of the treatment body is fixedly connected to a return pipe, the output end of the return pipe is fixedly connected to a water tank, the inside of the water tank is fixedly connected to a water supply pipe, the outside of the water supply pipe is fixedly connected to valve three, and the top of the water supply pipe is fixedly connected to the top of the treatment body.

[0008] As a further description of the above technical solution:

[0009] The inspection assembly includes an inspection door and an outer shell. The bottom of the inspection door is rotatably connected to the outside of the processing body. The upper side of the inspection door is fixedly connected to a fixed block. The inner side of the outer shell is fixedly connected to the outside of the processing body. The inner bottom wall of the outer shell is fixedly connected to a sleeve frame. The inner wall of the sleeve frame is slidably connected to a pull rod. The middle of the pull rod is fixedly connected to a baffle. The top of the baffle is fixedly connected to a spring. The left and right sides of the sleeve frame are fixedly connected to sliding rods. The outside of the sliding rod is slidably connected to an insertion rod. A connecting rod is provided between the insertion rod and the baffle.

[0010] As a further description of the above technical solution:

[0011] The processing body is distributed symmetrically front to back, and the water tank is distributed symmetrically front to back.

[0012] As a further description of the above technical solution:

[0013] One end of the connecting rod is rotatably connected to the outside of the baffle, and the other end of the connecting rod is rotatably connected to the top of the insertion rod.

[0014] As a further description of the above technical solution:

[0015] The interior of the spring is sleeved on the exterior of the pull rod, and the top end of the spring is fixedly connected to the top wall of the housing.

[0016] As a further description of the above technical solution:

[0017] The bottom of the baffle is in contact with the top of the sleeve frame, and the outside of the pull rod is slidably connected to the inside of the upper side of the shell.

[0018] As a further description of the above technical solution:

[0019] The outer portion of the insertion rod passes through the interior of the shell and is inserted into the interior of the fixing block.

[0020] As a further description of the above technical solution:

[0021] The inner side of the fixing block is slidably connected to the outer side of the shell.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, by adopting the form of one in use and one in standby, when one of the treatment bodies is working, the flue gas enters the treatment body through the inlet water seal and the air inlet pipe for purification. When flushing is required, the valve on the air inlet pipe is controlled to switch to the other treatment body for normal operation. The two devices operate alternately without shutting down, thereby improving work efficiency.

[0024] 2. In the present invention, by pulling the pull rod under the limit of the collar, the baffle compresses the spring, and at the same time drives the connecting rod to pull the plug rod, and the plug rod is retracted into the shell under the limit of the sliding rod, thereby realizing the rapid unlocking of the maintenance door and facilitating the maintenance work inside the processing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of a phosphoric acid tail gas treatment device proposed in the utility model;

[0026] Figure 2 This is a schematic structural diagram of a treatment body of a phosphoric acid tail gas treatment device proposed in the present invention;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a structural schematic diagram of a rod of a phosphoric acid tail gas treatment device proposed in the utility model.

[0029] Legend:

[0030] 1. Inlet water seal; 2. Inlet pipe; 3. Valve 1; 4. Processing body; 5. Outlet pipe; 6. Valve 2; 7. Outlet water seal; 8. Return pipe; 9. Water tank; 10. Water pipe; 11. Valve 3; 12. Inspection door; 13. Fixing block; 14. Outer casing; 15. Frame; 16. Pull rod; 17. Baffle; 18. Spring; 19. Connecting rod; 20. Insert rod; 21. Sliding rod. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1 - Figure 4 The utility model provides an embodiment of a phosphoric acid tail gas treatment device, comprising an inlet water seal 1, the inlet water seal 1 being an air inlet for the phosphoric acid tail gas, an alternating treatment component being installed on the top of the inlet water seal 1, and an overhaul component being installed inside the alternating treatment component;

[0033] The alternating treatment component includes two air inlet pipes 2, the left side of the air inlet pipe 2 is fixedly connected to the output end of the inlet water seal 1, the outside of the air inlet pipe 2 is fixedly connected to a valve 1 3, the right side of the air inlet pipe 2 is fixedly connected to a treatment body 4, the output end of the treatment body 4 is fixedly connected to an air outlet pipe 5, the outside of the air outlet pipe 5 is fixedly connected to a valve 2 6, an outlet water seal 7 is fixedly connected between the output ends of the two air outlet pipes 5, the bottom of the treatment body 4 is fixedly connected to a return pipe 8, the output end of the return pipe 8 is fixedly connected to a water tank 9, the inside of the water tank 9 is fixedly connected to a water pipe 10, the outside of the water pipe 10 is fixedly connected to a valve 3 11, the top of the water pipe 10 is fixedly connected to the top of the treatment body 4, the air inlet pipe 2 is used to Phosphoric acid tail gas is transported to the treatment body 4. Valve 1 3 is used to control the opening and closing of the air inlet pipe 2. The treatment body 4 is used to treat the phosphoric acid tail gas. The air outlet pipe 5 is used to transport the treated phosphoric acid tail gas to the outlet water seal 7. Valve 2 6 is used to control the opening and closing of the air outlet pipe 5. The outlet water seal 7 is a unified discharge port for the treated phosphoric acid tail gas. The return pipe 8 is used to return water to the water tank 9. The water tank 9 is a container for storing water. The water pipe 10 is used to transport water to the treatment body 4. Valve 3 11 is used to control the opening and closing of the water pipe 10. The treatment body 4 is symmetrically distributed front to back, and the water tank 9 is symmetrically distributed front to back. The two sets of equipment are used to achieve non-stop switching treatment.

[0034] Reference Figure 1 - Figure 4The maintenance assembly includes an inspection door 12 and a shell 14. The bottom of the inspection door 12 is rotatably connected to the outside of the processing body 4. The upper side of the inspection door 12 is fixedly connected to a fixed block 13. The inner side of the shell 14 is fixedly connected to the outside of the processing body 4. The inner bottom wall of the shell 14 is fixedly connected to a sleeve frame 15. The inner wall of the sleeve frame 15 is slidably connected to a pull rod 16. The middle part of the pull rod 16 is fixedly connected to a baffle 17. The top of the baffle 17 is fixedly connected to a spring 18. The left and right sides of the sleeve frame 15 are fixedly connected to slide rods 21. The slide rod 21 The external sliding connection is provided with an insertion rod 20, and a connecting rod 19 is provided between the insertion rod 20 and the baffle 17. The inspection door 12 is used to facilitate the inspection of the processing body 4. The outer shell 14 is used to connect and protect the internal parts. The sleeve frame 15 is used to limit the moving direction of the pull rod 16 to ensure that the pull rod 16 can only move up and down and will not move around. The pull rod 16 is used to manually pull the baffle 17 to compress the spring 18. The baffle 17 bears the pressure from the spring 18 and drives the pull rod 16 to move. The spring 18 is used to push the baffle The plate 17 resets the pull rod 16, and the connecting rod 19 is used to drive the plug rod 20 to move. The plug rod 20 is used to fix the inspection door 12 on the processing body 4. The slide bar 21 is used to limit the movement direction of the plug rod 20 to ensure that the plug rod 20 can only move left and right and will not move around. One end of the connecting rod 19 is rotatably connected to the outside of the baffle 17, and the other end of the connecting rod 19 is rotatably connected to the top of the plug rod 20 to ensure that the baffle 17 moves and can drive the connecting rod 19 to pull the plug rod 20 to move. The spring 18 is set inside the pull rod On the outside of the rod 16, the top of the spring 18 is fixedly connected to the top wall of the shell 14 to keep the spring 18 stable. The bottom of the baffle 17 abuts against the top of the sleeve 15 to limit the movement distance of the pull rod 16. The outside of the pull rod 16 is slidably connected to the inside of the upper side of the shell 14 to limit the movement direction of the pull rod 16. The outside of the plug rod 20 passes through the inside of the shell 14 and is inserted into the inside of the fixed block 13 to achieve fixation. The inside of the fixed block 13 is slidably connected to the outside of the shell 14 to ensure that the inspection door 12 can be fixed in the specified position.

[0035] Working principle: When using this device, the phosphoric acid tail gas is uniformly transported to the inlet water seal 1, and then transported to the treatment body 4 by one of the air inlet pipes 2. In conjunction with the treatment body 4, the DC voltage of the high-voltage direct current sent in is 40-60KV. Under the action of this high-voltage electric field, the gas around the corona electrode is ionized. As a result of ionization, electrons and positively charged ions are generated. During the flow of the gas, the phosphorus, sulfur, and hydrogen compounds therein are attracted by the electrons and the positively charged ions to form electron-carrying particles and positively charged particles. Under the action of the high-voltage electric field, these charged particles move toward their relative poles, that is, the negatively charged phosphorus, sulfur, and hydrogen compounds particles move toward the precipitation pole, and the positively charged phosphorus, sulfur, and hydrogen compounds particles move toward the corona pole. In the process of movement, they continuously absorb other phosphorus, sulfur, and hydrogen compounds particles, making them into larger particles, and finally reach the precipitation pole for adsorption and adhere to the pipe wall. The treated exhaust gas is then transported to the outlet water seal 7 through the outlet pipe 5 for unified discharge. When it is necessary to treat the exhaust gas in the treatment body 4, the exhaust gas is discharged uniformly. When cleaning the interior, close valve 1 3 and valve 2 6 on this side, and open valve 1 3 and valve 2 6 on the other side to make the processing body 4 on the other side work, then open valve 3 11 on this side, and transport the water in the water tank 9 to the processing body 4 through the water pipe 10 to flush the inner wall. The flushed water flows back to the water tank 9 through the return pipe 8 to achieve circulation. When it is necessary to inspect the processing body 4, first pull the pull rod 16 under the limit of the sleeve frame 15 to compress the baffle 17 18, at the same time, the connecting rod 19 pulls the plug rod 20 to move inward, retracts the plug rod 20 into the interior of the shell 14 and disengages it from the fixed block 13 to achieve unlocking, then opens the inspection door 12 and starts inspection, when the inspection is completed, closes the inspection door 12, then releases the pull rod 16, the spring 18 will immediately push the baffle 17 to reset the pull rod 16, under the limit of the slide bar 21, the connecting rod 19 pushes the plug rod 20 outward, pops out the plug rod 20 and plugs it into the interior of the fixed block 13 to achieve fixation, and then it can work normally.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A phosphoric acid tail gas treatment device, comprising an inlet water seal (1), characterized in that: An alternating treatment component is installed on the top of the inlet water seal (1), and an inspection component is installed inside the alternating treatment component; The alternating treatment component comprises two air inlet pipes (2), the left side of the air inlet pipe (2) is fixedly connected to the output end of the inlet water seal (1), the outside of the air inlet pipe (2) is fixedly connected to a valve one (3), the right side of the air inlet pipe (2) is fixedly connected to a treatment body (4), the output end of the treatment body (4) is fixedly connected to an air outlet pipe (5), the outside of the air outlet pipe (5) is fixedly connected to a valve two (6), an outlet water seal (7) is fixedly connected between the output ends of the two air outlet pipes (5), the bottom of the treatment body (4) is fixedly connected to a water return pipe (8), the output end of the water return pipe (8) is fixedly connected to a water trough (9), the inside of the water trough (9) is fixedly connected to a water supply pipe (10), the outside of the water supply pipe (10) is fixedly connected to a valve three (11), and the top of the water supply pipe (10) is fixedly connected to the top of the treatment body (4).

2. A phosphoric acid tail gas treatment device according to claim 1, characterized in that: The inspection assembly includes an inspection door (12) and a shell (14), the bottom of the inspection door (12) is rotatably connected to the outside of the processing body (4), the upper side of the inspection door (12) is fixedly connected to a fixed block (13), the inner side of the shell (14) is fixedly connected to the outside of the processing body (4), the inner bottom wall of the shell (14) is fixedly connected to a sleeve (15), the inner wall of the sleeve (15) is slidably connected to a pull rod (16), the middle part of the pull rod (16) is fixedly connected to a baffle (17), the top of the baffle (17) is fixedly connected to a spring (18), the left and right sides of the sleeve (15) are fixedly connected to a slide rod (21), the outside of the slide rod (21) is slidably connected to an insertion rod (20), and a connecting rod (19) is provided between the insertion rod (20) and the baffle (17).

3. The phosphoric acid tail gas treatment equipment according to claim 1, characterized in that: The processing body (4) is symmetrically distributed front to back, and the water tank (9) is symmetrically distributed front to back.

4. The phosphoric acid tail gas treatment equipment according to claim 2, characterized in that: One end of the connecting rod (19) is rotatably connected to the outside of the baffle (17), and the other end of the connecting rod (19) is rotatably connected to the top of the insertion rod (20).

5. The phosphoric acid tail gas treatment equipment according to claim 2, characterized in that: The interior of the spring (18) is sleeved on the exterior of the pull rod (16), and the top end of the spring (18) is fixedly connected to the inner top wall of the housing (14).

6. The phosphoric acid tail gas treatment equipment according to claim 2, characterized in that: The bottom of the baffle (17) is in contact with the top of the sleeve frame (15), and the outside of the pull rod (16) is slidably connected to the inside of the upper side of the shell (14).

7. The phosphoric acid tail gas treatment equipment according to claim 2, characterized in that: The outside of the insertion rod (20) passes through the inside of the housing (14) and is inserted into the inside of the fixing block (13).

8. The phosphoric acid tail gas treatment equipment according to claim 2, characterized in that: The inner side of the fixing block (13) is slidably connected to the outside of the shell (14).

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