Device for treating acidic tail gas by high-temperature dry method

Abstract

The utility model relates to a device for treating acidic tail gas by a high-temperature dry method and belongs to the technical field of waste gas treatment. Comprising a powder collecting device, supporting legs are arranged on the lower portion of the powder collecting device, a cooling device is arranged on the periphery of the powder collecting device, a reaction device is arranged on the top of the powder collecting device, and a hollow tail gas treatment device is arranged on the top of the reaction device. A powder inlet is formed in the upper part of the reaction device, and a tail gas inlet is formed in the lower part of the reaction device; and an outlet of the powder bin is communicated with the powder inlet on the reaction device through a pipeline. According to the device, powder flows from top to bottom, tail gas flows from bottom to top, sufficient reaction of the powder and the tail gas is ensured, and the acid gas removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a high-temperature dry-process acid tail gas treatment device, belonging to the technical field of waste gas treatment. Background Art

[0002] In industries such as chemical processing, metallurgy, and energy, production processes often generate exhaust gases containing large amounts of acidic gases, such as sulfuric acid mist and hydrogen chloride. Directly discharging these acidic gases without treatment can have serious impacts on the environment and human health. Sludge incineration also produces large amounts of acidic exhaust gases. These flue gases are characterized by high humidity, dust, sulfur content, and acidity. High HCl concentrations can cause corrosion to flue gas ducts, equipment, and chimneys. Existing treatment methods include wet and dry methods, with dry treatment technology being widely used due to its small footprint and high efficiency.

[0003] Chinese patent (CN210448717U) discloses a dry powder spraying deacidification device for acidic tail gas, comprising a treatment box, support rods are welded at the four corners of the lower end of the treatment box, and a recovery component is fixedly connected to the lower surface of the treatment box, a cover plate is installed on the upper surface of the treatment box, and a feed port is fixedly installed on the front surface of the treatment box, slide grooves are provided on the front and rear inner walls of the treatment box, and a filter plate is fixedly installed at one end of the interior of the treatment box, a blower is fixedly connected to the side surface of the feed port, a noise reduction component is fixedly installed on the inner wall of the blower, and a cleaning component is slidably connected to the inside of the slide groove. By providing a recovery component, the powder after the reaction can be collected and processed conveniently, and by providing a cleaning component, the inner wall of the treatment box can be cleaned, thereby reducing the workload of the staff, and by providing a noise reduction component, the noise generated by the blower during operation can be reduced, thereby protecting the health of the staff.

[0004] The problem with the above patent is that the acidic exhaust gas flows in a horizontal direction, and the treatment box is also placed horizontally. Therefore, the blower blows the powder into the treatment box in a horizontal direction. However, under the action of gravity, the powder can easily make parabolic motion, resulting in a lot of powder falling into the recovery component before it has time to come into contact with the acidic exhaust gas for neutralization reaction, resulting in insufficient exhaust gas treatment and waste of resources. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the shortcomings of the existing technology and provide a high-temperature dry method for treating acidic tail gas, so as to realize the flow of powder from top to bottom and the flow of tail gas from bottom to top, thereby ensuring the full reaction of powder and tail gas and improving the efficiency of acid removal.

[0006] The utility model describes a high-temperature dry method for treating acidic tail gas, comprising a powder collecting device, a support leg being arranged at the lower portion of the powder collecting device, a cooling device being arranged on the periphery of the powder collecting device, a reaction device being arranged on the top of the powder collecting device, a tail gas treatment device with a hollow interior being arranged on the top of the reaction device, the powder collecting device, the reaction device and the tail gas treatment device being internally connected, a discharge port being arranged at the top of the tail gas treatment device, a powder inlet being arranged at the upper portion of the reaction device, and a tail gas inlet being arranged at the lower portion of the reaction device; and further comprising a powder silo, the outlet of which is connected to the powder inlet on the reaction device via a pipeline.

[0007] A nozzle is arranged in the reaction device, one end of the nozzle is connected with the powder inlet, and a plurality of nozzles are evenly distributed at the bottom of the nozzle.

[0008] A mesh screen mechanism is provided in the tail gas treatment device.

[0009] The bottom of the powder collecting device is conical, and a powder collecting port is provided at the bottom of the powder collecting device.

[0010] The cooling device comprises a cooling water jacket arranged on the periphery of the powder collecting device, a cooling water inlet is arranged at the bottom of the cooling water jacket, and a cooling water outlet is arranged at the top of the cooling water jacket.

[0011] The upper wall of the cooling water jacket is adapted to the outer shape of the powder collecting device.

[0012] A conveying fan is arranged on the pipeline, and an outlet of the conveying fan is connected to the pipeline.

[0013] A pressure alarm and a pressure indicator are provided on the pipeline corresponding to the outlet of the conveying fan.

[0014] The powder silo is uniformly distributed with a first material level sensing device, a second material level sensing device and a third material level sensing device from top to bottom. The first material level sensing device, the second material level sensing device and the third material level sensing device are all used to sense the position of the powder in the powder silo.

[0015] A pulse jet bag dust removal device is installed on the top of the powder silo.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model ensures the full reaction of powder and exhaust gas and improves the efficiency of acid gas removal by designing the powder to flow from top to bottom and the exhaust gas to flow from bottom to top. The cooling device arranged on the periphery can effectively reduce the temperature of the powder collection device and ensure the stable operation of the system. The design of the reaction device helps to increase the contact area between the powder and the flue gas, thereby improving the reaction efficiency. The discharge port at the top of the exhaust gas treatment device is convenient for monitoring and cleaning, and the support leg design facilitates the installation and maintenance of the equipment. The powder bin outlet is connected to the powder inlet on the reaction device through a pipeline, which facilitates the transportation and supply of powder and improves the continuous operation capability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of Example 1 of the present utility model.

[0019] In the figure: 1. Exhaust gas treatment device; 2. Discharge port; 3. Reactor; 4. Powder inlet; 5. Pressure alarm; 6. Pressure indicator; 7. Conveying fan; 8. Pipeline; 9. Powder silo; 10. First material level sensing device; 11. Second material level sensing device; 12. Third material level sensing device; 13. Support leg; 14. Cooling water outlet; 15. Cooling water jacket; 16. Powder collecting device; 17. Powder collecting port; 18. Cooling water inlet; 19. Exhaust gas inlet; 20. Nozzle; 21. Nozzle. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the embodiments:

[0021] Example 1

[0022] like Figure 1 As shown, the high-temperature dry method acidic tail gas treatment device described in the present invention includes a powder collecting device 16, a support leg 13 is provided at the lower part of the powder collecting device 16, a cooling device is provided on the periphery of the powder collecting device 16, a reaction device 3 is provided on the top of the powder collecting device 16, and an internal hollow tail gas treatment device 1 is provided on the top of the reaction device 3. The powder collecting device 16, the reaction device 3 and the tail gas treatment device 1 are internally connected, a discharge port 2 is provided on the top of the tail gas treatment device 1, a powder inlet 4 is provided on the upper part of the reaction device 3, and a tail gas inlet 19 is provided at the lower part of the reaction device 3; it also includes a powder silo 9, and the outlet of the powder silo 9 is connected to the powder inlet 4 on the reaction device 3 through a pipeline 8.

[0023] By designing the powder to flow from top to bottom and the exhaust gas to flow from bottom to top, the full reaction of the powder and the exhaust gas is ensured, and the efficiency of acid removal is improved. The cooling device arranged on the periphery can effectively reduce the temperature of the powder collection device 16, ensuring stable operation of the system. The design of the reaction device 3 helps to increase the contact area between the powder and the flue gas, thereby improving the reaction efficiency. The discharge port 2 at the top of the exhaust gas treatment device 1 is convenient for monitoring and cleaning, and the support leg 13 is designed to facilitate the installation and maintenance of the equipment. The outlet of the powder bin 9 is connected to the powder inlet 4 on the reaction device 3 through a pipeline 8, which facilitates the transportation and supply of powder and improves the continuous operation capability of the system.

[0024] A nozzle 21 is provided within the reaction device 3. One end of the nozzle 21 is connected to the powder inlet 4. Several nozzles 20 are evenly distributed at the bottom of the nozzle 21. The nozzle 21 is evenly distributed at the bottom of the nozzle 21 and is connected to the powder inlet 4. This helps increase the contact area between the powder and the flue gas, thereby improving reaction efficiency.

[0025] A mesh screen mechanism is provided in the tail gas treatment device 1. The mesh screen can prevent the powder from rising, helping to reduce dust emission during the spraying process of the powder, which is beneficial to environmental protection.

[0026] The bottom of the powder collection device 16 is conical, and a powder collection port 17 is provided at the bottom of the powder collection device 16. The conical design helps concentrate the powder at the bottom, making powder collection more concentrated and efficient, and facilitating collection from the powder collection port 17. The conical bottom can also reduce powder residue at the bottom of the device, ensuring sufficient powder collection and reducing waste.

[0027] The cooling device includes a cooling water jacket 15 disposed around the powder collection device 16. A cooling water inlet 18 is provided at the bottom of the cooling water jacket 15, and a cooling water outlet 14 is provided at the top of the cooling water jacket 15. The cooling water jacket 15 effectively absorbs waste heat within the reactor through a circulating cooling water system, thereby reducing the reactor temperature and improving cooling efficiency.

[0028] The upper wall of the cooling water jacket 15 conforms to the outer periphery of the powder collection device 16. This conformity maximizes the contact area between the cooling water and the outer wall of the device, thereby improving cooling efficiency. This good fit reduces cooling water usage while achieving more efficient cooling.

[0029] A conveying fan 7 is provided on the pipeline 8, and an outlet of the conveying fan 7 is connected to the pipeline 8. The conveying fan 7 can increase the flow speed of the powder, thereby improving the conveying efficiency of the powder and ensuring that the powder can enter the reaction device 3 in a timely and effective manner.

[0030] A pressure alarm 5 and a pressure indicator 6 are installed on pipeline 8, corresponding to the outlet of conveying fan 7. These devices allow real-time monitoring of pressure changes at the outlet of conveying fan 7, ensuring that the system operates within a safe pressure range. The pressure alarm 5 sounds an alarm when pipeline pressure is excessively high, enabling timely action to prevent powder blockage and ensure continuous and stable system operation. The pressure indicator 6 provides a visual display of pressure, allowing operators to adjust system operating parameters based on the pressure readings to ensure safe operation.

[0031] A first material level sensing device 10, a second material level sensing device 11, and a third material level sensing device 12 are uniformly distributed from top to bottom within the powder silo 9. Each of the first material level sensing device 10, the second material level sensing device 11, and the third material level sensing device 12 is used to sense the position of the powder within the powder silo 9. The three material level sensing devices can monitor the position of the powder at different heights within the powder silo 9, thereby achieving precise control of the powder position and ensuring a continuous and stable supply of powder.

[0032] A pulse jet bag dust removal device is installed on the top of the powder silo 9. During the feeding of the powder silo 9, the air in the powder silo 9 is discharged to the outside through the pulse jet bag dust removal device to avoid pressurizing the powder silo 9.

[0033] Working process: The powder in the powder silo 9 is transported to the powder inlet 4 on the reaction device 3 by the conveying fan 7. After entering the reaction device 3, the powder is sprayed into the reaction device 3 by the nozzle 20 at the bottom of the nozzle 21 through the nozzle 21 provided in the reaction device 3, and reacts with the acidic tail gas. The tail gas after deacidification rises to the tail gas treatment device 1, and the tail gas is further purified by the mesh screen mechanism. The powder after the reaction falls to the powder collection device 16 for collection.

[0034] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up and down, does not constitute a limitation of the present invention and is only for the convenience of description.

Claims

1. A high-temperature dry process acid tail gas treatment device, characterized in that: The invention comprises a powder collecting device (16), a support leg (13) is provided at the bottom of the powder collecting device (16), a cooling device is provided on the periphery of the powder collecting device (16), a reaction device (3) is provided on the top of the powder collecting device (16), a tail gas treatment device (1) with a hollow interior is provided on the top of the reaction device (3), the powder collecting device (16), the reaction device (3) and the tail gas treatment device (1) are internally connected, a discharge port (2) is provided at the top of the tail gas treatment device (1), a powder inlet (4) is provided at the top of the reaction device (3), and a tail gas inlet (19) is provided at the bottom of the reaction device (3); and the invention also comprises a powder silo (9), the outlet of the powder silo (9) is connected to the powder inlet (4) on the reaction device (3) through a pipeline (8).

2. The high-temperature dry process acid tail gas treatment device according to claim 1, characterized in that: A nozzle (21) is provided in the reaction device (3), one end of the nozzle (21) is connected to the powder inlet (4), and a plurality of nozzles (20) are evenly distributed at the bottom of the nozzle (21).

3. The high-temperature dry process acid tail gas treatment device according to claim 2, characterized in that: A mesh screen mechanism is provided in the tail gas treatment device (1).

4. The high-temperature dry process acid tail gas treatment device according to claim 3, characterized in that: The bottom of the powder collecting device (16) is arranged in a cone shape, and a powder collecting port (17) is arranged at the bottom of the powder collecting device (16).

5. The high-temperature dry process acid tail gas treatment device according to any one of claims 1 to 4, characterized in that: The cooling device comprises a cooling water jacket (15) arranged on the periphery of the powder collecting device (16), a cooling water inlet (18) is arranged at the bottom of the cooling water jacket (15), and a cooling water outlet (14) is arranged at the top of the cooling water jacket (15).

6. The high-temperature dry process acid tail gas treatment device according to claim 5, characterized in that: The upper wall of the cooling water jacket (15) is adapted to the outer peripheral shape of the powder collecting device (16).

7. The high-temperature dry process acid tail gas treatment device according to claim 5, characterized in that: A conveying fan (7) is arranged on the pipeline (8), and an outlet of the conveying fan (7) is connected to the pipeline (8).

8. The high-temperature dry process acid tail gas treatment device according to claim 7, characterized in that: A pressure alarm (5) and a pressure indicator (6) are provided on the pipeline (8) corresponding to the outlet of the conveying fan (7).

9. The high-temperature dry process acid tail gas treatment device according to claim 5, characterized in that: A first material level sensing device (10), a second material level sensing device (11) and a third material level sensing device (12) are uniformly distributed in the powder material bin (9) from top to bottom. The first material level sensing device (10), the second material level sensing device (11) and the third material level sensing device (12) are all used to sense the position of the powder material in the powder material bin (9).

10. The high-temperature dry process acid tail gas treatment device according to claim 9, characterized in that: A pulse jet bag dust removal device is installed on the top of the powder bin (9).

Images