Preheating device for waste gas treatment

Abstract

The utility model discloses a preheating device for waste gas treatment in the related technical field of waste gas treatment preheating, which comprises a waste gas pretreatment cylinder and a main preheating box, a control box is arranged on the outer wall of the waste gas pretreatment cylinder, the top of the waste gas pretreatment cylinder is of a cone structure, and the upper end of the cone is connected with a treatment discharge main pipe. And the other end of the treatment discharge main pipe is connected with two discharge branch pipes, control valves are installed on the discharge branch pipes, and the other ends of the two discharge branch pipes are connected with the first drying box and the second drying box correspondingly. Waste gas is firstly introduced into the preheating circulating pipe of the main preheating box, the waste gas subjected to earlier stage treatment is preheated, temperature guarantee is provided for follow-up treatment, meanwhile, the temperature of the waste gas subjected to earlier stage treatment can be reduced, heat energy in the waste gas is effectively recycled, the waste gas is introduced into the waste gas pretreatment barrel, and the waste gas is recycled. Water-soluble substances in the waste gas can be effectively removed, and the waste gas is primarily treated.

Description

Technical Field

[0001] This utility model belongs to the technical field of waste gas treatment preheating, specifically, it relates to a preheating device for waste gas treatment. Background Technology

[0002] Waste gas treatment mainly refers to the treatment of industrial waste gases generated in industrial sites, such as particulate matter, flue gas, odorous gases, and toxic and harmful gases. Common waste gas purification methods include factory flue gas purification, workshop dust gas purification, organic waste gas purification, odor removal, acid and alkali waste gas purification, and chemical waste gas purification. Existing waste gas treatment devices typically spray water mist onto the waste gas for pre-treatment. The water mist dissolves pollutants in the waste gas, facilitating subsequent filtration and purification, thus improving treatment efficiency. However, the high humidity after water mist spraying can negatively impact subsequent waste gas treatment processes.

[0003] In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a preheating device for waste gas treatment. The basic concept of the technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows:

[0005] A preheating device for waste gas treatment includes a waste gas pretreatment cylinder and a main preheating box. A control box is installed on the outer wall of the waste gas pretreatment cylinder. The top of the waste gas pretreatment cylinder has a conical structure, and the upper end of the cone is connected to the main treatment discharge pipe. The other end of the main treatment discharge pipe is connected to two discharge branch pipes. A control valve is installed on each discharge branch pipe. The other ends of the two discharge branch pipes are respectively connected to a drying chamber one and a drying chamber two. Humidity sensors are installed on the discharge end pipes of the drying chamber one and the drying chamber two. The drying chamber is connected in three phases, and the three drying chambers are arranged in parallel with a drying direct exhaust pipe. The dried gas is supplied to the main preheating chamber. The discharge pipe of the main preheating chamber is connected to the auxiliary preheating chamber and the preheating direct exhaust pipe. The preheating direct exhaust pipe is connected to the preheating discharge pipe. A preheating circulation pipe is provided in the main preheating chamber. The discharge end of the preheating circulation pipe is connected to the preheating gas outlet pipe. The other end of the preheating gas outlet pipe extends to the bottom of the waste gas pretreatment cylinder, so that the waste gas can fully contact the liquid in the waste gas treatment cylinder.

[0006] As a further embodiment of this utility model: the other end of the preheating circulation pipe is a preheating air inlet, and a heat-conducting baffle is provided inside the main preheating box on the inner side of the preheating circulation pipe. A baffle is provided offset inside the heat-conducting baffle. The baffle can prolong the time of the pretreated gas in the main preheating box, thereby improving the preheating effect.

[0007] As a further improvement of this utility model: a corrugated plate demister is provided near the upper part of the exhaust gas pretreatment cylinder, and an inlet and an outlet are provided on the outer wall of the exhaust gas pretreatment cylinder for replenishing and replacing the liquid in the exhaust gas pretreatment cylinder.

[0008] As a further improvement of this utility model: each of the three drying chambers is equipped with silica gel desiccant, and the first and second drying chambers are connected in parallel in the pipeline to facilitate the replacement of the desiccant in the drying chambers.

[0009] As a further improvement of this utility model: the auxiliary preheating box is an electric heating box, and a temperature sensor is installed on the discharge pipe of the main preheating box to monitor the preheating temperature after being processed by the main preheating box.

[0010] As a further improvement of this utility model: each of the drying oven 1, the drying oven 2, the drying oven 3, the preheating direct discharge pipe, and the preheating discharge pipe is equipped with a control valve to control the on / off status of the corresponding pipe.

[0011] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0012] This invention first introduces the waste gas into the preheating circulation pipe of the main preheating box to preheat the waste gas after the initial treatment, providing temperature assurance for subsequent treatment. At the same time, it can also reduce the temperature of the waste gas in the initial treatment and effectively recover and utilize the heat energy in the waste gas. The waste gas is then introduced into the waste gas pretreatment cylinder, which can effectively remove water-soluble substances from the waste gas and perform preliminary treatment of the waste gas.

[0013] The upper part of the exhaust gas pretreatment cylinder of this utility model is equipped with a corrugated plate demister, which can reduce the humidity of the gas. The gas is discharged through the main discharge pipe after treatment. Drying chamber 1, drying chamber 2, and drying chamber 3 are provided for further drying of the gas. After drying, the gas enters the main preheating chamber for preheating. The device is also equipped with an auxiliary preheating chamber to ensure the preheating effect of exhaust gas treatment.

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

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

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 This is the front view of the present invention;

[0019] Figure 4 This is a schematic diagram of the interior of the main preheating box of this utility model;

[0020] Figure 5 This is a schematic diagram of the interior of the drying oven of this utility model;

[0021] Figure 6 This is a block diagram showing the connection of some components of this utility model.

[0022] In the diagram: 1. Exhaust gas pretreatment cylinder; 2. Liquid inlet; 3. Liquid outlet; 4. Control box; 5. Main preheating box; 6. Drying box one; 7. Drying box two; 8. Drying box three; 9. Auxiliary preheating box; 10. Preheating air inlet; 11. Preheating air outlet pipe; 12. Main discharge pipe; 13. Discharge branch pipe; 14. Control valve; 15. Humidity sensor; 16. Drying direct discharge pipe; 17. Preheating direct discharge pipe; 18. Preheating discharge pipe; 19. Corrugated plate demister; 20. Preheating circulation pipe; 21. Thermal conductive baffle; 22. Baffle plate; 23. Silica gel desiccant; 24. Temperature sensor.

[0023] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] like Figures 1 to 6As shown, a preheating device for waste gas treatment includes a waste gas pretreatment cylinder 1 and a main preheating box 5. A control box 4 is installed on the outer wall of the waste gas pretreatment cylinder 1. The top of the waste gas pretreatment cylinder 1 has a conical structure, and the upper end of the cone is connected to the main discharge pipe 12. The other end of the main discharge pipe 12 is connected to two discharge branch pipes 13. A control valve 14 is installed on the discharge branch pipes 13. The other ends of the two discharge branch pipes 13 are respectively connected to a drying chamber 6 and a drying chamber 7. A humidity sensor 15 is installed on the discharge end pipes of the drying chamber 6 and the drying chamber 7. The pipeline is connected to the drying chamber 3 8. The drying chamber 3 8 is equipped with a drying direct discharge pipe 16 in parallel. The gas after drying is supplied to the main preheating chamber 5. The discharge pipe of the main preheating chamber 5 is connected to the auxiliary preheating chamber 9 and the preheating direct discharge pipe 17 respectively. The preheating direct discharge pipe 17 is connected to the preheating discharge pipe 18. The main preheating chamber 5 is equipped with a preheating circulation pipe 20. The discharge end of the preheating circulation pipe 20 is connected to the preheating gas outlet pipe 11. The other end of the preheating gas outlet pipe 11 extends to the bottom of the waste gas pretreatment cylinder 1 so that the waste gas can fully contact the liquid in the waste gas treatment cylinder.

[0026] The other end of the preheating circulation pipe 20 is a preheating air inlet 10. A heat-conducting baffle 21 is provided inside the preheating circulation pipe 20 in the main preheating box 5. A baffle 22 is provided inside the heat-conducting baffle 21 in a staggered manner. The baffle 22 can extend the time of the pretreated gas in the main preheating box 5, thereby improving the preheating effect.

[0027] A corrugated plate demister 19 is installed near the upper part of the exhaust gas pretreatment cylinder 1. An inlet 2 and a outlet 3 are provided on the outer wall of the exhaust gas pretreatment cylinder 1 for replenishing and replacing the liquid in the exhaust gas pretreatment cylinder 1.

[0028] Silica gel desiccant 23 is installed in drying oven 1 (6), drying oven 2 (7), and drying oven 3 (8). Drying oven 1 (6) and drying oven 2 (7) are connected in parallel in the pipeline to facilitate the replacement of the desiccant in the drying oven.

[0029] The auxiliary preheating box 9 is an electric heating box, and a temperature sensor 24 is installed on the discharge pipe of the main preheating box 5 to monitor the preheating temperature after being processed by the main preheating box 5.

[0030] Control valves 14 are installed on drying oven 1 (6), drying oven 2 (7), drying oven 3 (8), preheating direct discharge pipe 17, and preheating discharge pipe 18 to control the on / off status of the corresponding pipes.

[0031] The working principle of this utility model is as follows: High-temperature exhaust gas is supplied into the preheating circulation pipe 20 of the main preheating box 5 through the preheating inlet 10, and exchanges heat with the inside of the main preheating box 5. The other end of the preheating circulation pipe 20 is connected to the preheating outlet pipe 11, and the other end of the preheating outlet pipe 11 is connected to the exhaust gas pretreatment cylinder 1 and extends to the bottom of the liquid, so that the exhaust gas and the liquid in the exhaust gas pretreatment cylinder 1 can fully contact each other, effectively removing water-soluble substances in the exhaust gas. The exhaust gas rises to the position of the corrugated plate demister 19. The moisture in the gas collides with the corrugated plate and is attached to the surface of the corrugated plate. Due to the inertia of the gas, the droplets that accumulate after colliding with the corrugated plate will become very large. The gravity generated by these large droplets exceeds the resultant force of the gas lift and the surface tension of the liquid, so they will be separated from the corrugated plate, reducing the humidity of the exhaust gas.

[0032] The gas then enters the drying chamber for further drying. Drying chamber 6 and drying chamber 7 typically operate only one set at a time. For example, when drying chamber 6 is operating, the control valve 14 on the discharge branch pipe 13 of drying chamber 6 is open. The humidity sensor 15 at the discharge end of drying chamber 6 detects the drying status of the gas. If the requirements are met, the gas directly enters the main preheating chamber 5 through the drying direct discharge pipe 16 for preheating. If the humidity is too high and does not meet the requirements, it indicates that the silica gel desiccant 23 in drying chamber 6 has weakened its adsorption effect and needs to be replaced. The control valve 14 corresponding to drying chamber 6 is closed, and the corresponding pipeline of drying chamber 7... The control valve 14 on the main preheating chamber is opened, and the gas with high humidity will pass through the drying chamber 8 for further drying. During the gas treatment process, the desiccant can be replaced without stopping the machine. Silica gel desiccant 23 has the advantages of strong hygroscopicity, light weight, non-toxicity, harmlessness, and reusability. The used silica gel desiccant 23 can be placed in an oven to dry it and restore its water absorption capacity. It can be reused multiple times, effectively saving costs. The main preheating chamber 5 is equipped with an auxiliary preheating chamber 9. The auxiliary preheating chamber 9 is an electric heating chamber, which is existing technology. When the preheating temperature of the main preheating chamber 5 cannot meet the preheating temperature, the auxiliary preheating chamber 9 can perform auxiliary preheating.

[0033] This invention first introduces the waste gas into the preheating circulation pipe 20 of the main preheating box 5 to preheat the pre-treated waste gas, providing temperature assurance for subsequent treatment. It also reduces the temperature of the pre-treated waste gas and effectively recovers and utilizes the heat energy in the waste gas. The waste gas is then introduced into the waste gas pretreatment cylinder 1, which effectively removes water-soluble substances and performs preliminary treatment. A corrugated plate demister 19 is installed at the upper part of the waste gas pretreatment cylinder 1 to reduce gas humidity. The gas is discharged through the treatment discharge pipe 12. Drying chambers 6, 7, and 8 are provided for further drying of the gas. After drying, the gas enters the main preheating box 5 for preheating. The device is also equipped with an auxiliary preheating box 9 to ensure the preheating effect of the waste gas treatment.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A preheating device for waste gas treatment, comprising a waste gas pretreatment cylinder (1) and a main preheating box (5), characterized in that, A control box (4) is provided on the outer wall of the exhaust gas pretreatment cylinder (1). The top of the exhaust gas pretreatment cylinder (1) is a cone structure. The upper end of the cone is connected to the treatment discharge main pipe (12). The other end of the treatment discharge main pipe (12) is connected to two discharge branch pipes (13). A control valve (14) is installed on the discharge branch pipe (13). The other ends of the two discharge branch pipes (13) are respectively connected to the drying box one (6) and the drying box two (7). A humidity sensor (15) is installed on the discharge end pipe of the drying box one (6) and the drying box two (7). The discharge end pipe is connected to the drying box three (6) and the drying box two (7). 8) Connected to each other, the drying box three (8) is provided with a drying direct discharge pipe (16) in parallel. The gas after drying is supplied to the main preheating box (5). The discharge pipe of the main preheating box (5) is connected to the auxiliary preheating box (9) and the preheating direct discharge pipe (17) respectively. The preheating direct discharge pipe (17) is connected to the preheating discharge pipe (18). The main preheating box (5) is provided with a preheating circulation pipe (20). The discharge end of the preheating circulation pipe (20) is connected to the preheating gas outlet pipe (11). The other end of the preheating gas outlet pipe (11) extends to the bottom of the waste gas pretreatment cylinder (1).

2. The preheating device for waste gas treatment according to claim 1, characterized in that, The other end of the preheating circulation pipe (20) is a preheating air inlet (10). A heat-conducting baffle (21) is provided inside the preheating circulation pipe (20) in the main preheating box (5). A baffle (22) is provided inside the heat-conducting baffle (21) at an offset position.

3. The preheating device for waste gas treatment according to claim 2, characterized in that, A corrugated plate demister (19) is provided near the upper part of the exhaust gas pretreatment cylinder (1), and an inlet (2) and a outlet (3) are provided on the outer wall of the exhaust gas pretreatment cylinder (1).

4. A preheating device for waste gas treatment according to claim 3, characterized in that, The first drying chamber (6), the second drying chamber (7), and the third drying chamber (8) are all equipped with silica gel desiccant (23). The first drying chamber (6) and the second drying chamber (7) are connected in parallel in the pipeline.

5. A preheating device for waste gas treatment according to claim 4, characterized in that, The auxiliary preheating box (9) is an electric heating box, and a temperature sensor (24) is installed on the discharge pipe of the main preheating box (5).

6. A preheating device for waste gas treatment according to claim 5, characterized in that, Control valves (14) are provided on each of the drying chamber one (6), the drying chamber two (7), the drying chamber three (8), the preheating direct discharge pipe (17), and the preheating discharge pipe (18).

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