Harmful flue gas safety protection device

Abstract

The utility model relates to the technical field of harmful flue gas safety protection in acrylonitrile production, in particular to a harmful flue gas safety protection device. According to the harmful flue gas safety protection device, a storage tank is connected with a condensation tank through a washing tower, the condensation tank is connected with a gas phase temporary storage tank through an activated carbon adsorption tower, the gas phase temporary storage tank is connected with the storage tank through a pressure supplementing pipeline, a spraying disc is arranged in the washing tower, and an inclined ventilation plate is arranged in the activated carbon adsorption tower. According to the device, the activated carbon adsorption tower, the gas phase temporary storage tank and the pressure supplementing pipeline are arranged, harmful gas is subjected to adsorption treatment, the treated gas serves as pressure supplementing gas, when the pressure in the storage tank is reduced, pressure supplementing is conducted on the storage tank, the subsequent gas treatment amount is greatly reduced, the utilization of the harmful gas is increased, and the environment is protected. The industrial production is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of harmful smoke safety protection in acrylonitrile production, in particular to a harmful smoke safety protection device. Background Art

[0002] Acrylonitrile (C3H3N) is an important organic chemical widely used in the production of synthetic fibers, synthetic rubber, plastics, etc. Acrylonitrile is synthesized mainly through the propylene ammoxidation method, which reacts propylene and ammonia to produce acrylonitrile under high temperature, high pressure and catalyst conditions.

[0003] During the storage of acrylonitrile, harmful fumes may be volatilized, the main components of which include acrylonitrile, acrolein, hydrogen cyanide, etc. These harmful fumes are very harmful to the human body and the environment. For example, acrylonitrile is irritating and corrosive, acrolein is highly irritating and toxic, and hydrogen cyanide is a highly toxic gas. Existing devices treat harmful gases by washing and condensing, but nitrogen supplementation is required during the treatment process, which leads to an increase in the amount of gas entering the incinerator. While increasing the treatment volume, it also leads to an increase in the final waste gas output. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a harmful flue gas safety protection device, which adsorbs harmful gases through the arrangement of an activated carbon adsorption tower, a gas phase temporary storage tank and a pressure-compensating pipeline. The gas after treatment is used as a pressure-compensating gas. When the pressure in the storage tank is reduced, the storage tank is pressurized, which not only greatly reduces the subsequent gas processing volume, but also increases the utilization of harmful gases, which is beneficial to industrial production. Through the arrangement of a guide ventilation plate, the washing time of harmful gases in the washing tower is increased, which greatly improves the washing efficiency.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The harmful smoke safety protection device comprises a storage tank connected to a condensation tank through a washing tower, the condensation tank is connected to a gas phase temporary storage tank through an activated carbon adsorption tower, the gas phase temporary storage tank is connected to the storage tank through a pressure compensation pipeline, a spray plate is provided inside the washing tower, and an inclined ventilation plate is provided inside the activated carbon adsorption tower.

[0007] There are ventilation holes on the inclined ventilation plate, and an activated carbon outlet is provided on the vertical wall of the activated carbon adsorption tower. The activated carbon outlet is located on the lower side of the inclined ventilation plate, which is convenient for the activated carbon to be discharged by gravity. The gas entering the activated carbon adsorption tower adopts the setting of bottom-in and top-out, which improves the filtration efficiency and facilitates the replacement of activated carbon.

[0008] The gas treated by the activated carbon adsorption tower is temporarily stored in the gas phase temporary storage tank to maintain the pressure balance in the storage tank.

[0009] The storage tank is provided with a one-way air outlet and a safety pressure-compensating port, and the pressure-compensating pipeline is connected to the safety pressure-compensating port.

[0010] The one-way air outlet is connected to the washing tower through an inlet washing tower pipeline, and an impurity discharge pipeline is connected to the bottom of the washing tower.

[0011] A spray plate is arranged inside the washing tower. The washing tower is connected to a circulation pump through a circulation pump inlet pipeline, and the circulation pump is connected to the spray plate through a pipeline.

[0012] A guide ventilation plate is arranged below the spray plate, and ventilation holes and guide edges are arranged on the guide ventilation plate.

[0013] The guide air flow plate is used to increase the washing time of harmful gases in the washing tower.

[0014] A condenser is arranged inside the condensation tank, and the gas phase temporary storage tank is connected with the incinerator through a pipeline.

[0015] The working principle of the utility model is:

[0016] The harmful gas generated in the storage tank enters the washing tower through the one-way air outlet, and the circulating pump and the spray plate start working to wash the harmful gas. The guide ventilation plate is used to increase the washing time of the harmful gas in the washing tower; the gas after washing enters the condenser through the pipeline, the condenser starts working, and then enters the activated carbon adsorption tower for treatment. The gas after treatment enters the gas phase temporary storage tank for temporary storage; when the pressure in the storage tank decreases, the gas in the gas phase temporary storage tank enters the storage tank through the pressure compensation pipeline to replenish it, and the remaining gas enters the incinerator for treatment. Among them, there are ventilation holes on the inclined ventilation plate, and an activated carbon outlet is provided on the vertical wall of the activated carbon adsorption tower. The activated carbon outlet is located on the lower side of the inclined ventilation plate, which is convenient for the activated carbon to be discharged by gravity. The gas entering the activated carbon adsorption tower adopts the setting of bottom-in and top-out, which not only improves the filtration efficiency, but also facilitates the replacement of activated carbon. The gas treated by the activated carbon adsorption tower is temporarily stored in the gas phase temporary storage tank to maintain the pressure balance in the storage tank.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] By adopting the harmful smoke safety protection device of the utility model, harmful gases are adsorbed and treated through the arrangement of an activated carbon adsorption tower, a gas phase temporary storage tank and a pressure-compensating pipeline. The treated gas is used as a pressure-compensating gas. When the pressure in the storage tank is reduced, the storage tank is pressurized, which not only greatly reduces the subsequent gas processing volume, but also increases the utilization of harmful gases, which is beneficial to industrial production. By setting the guide ventilation plate, the washing time of harmful gases in the washing tower is increased, which greatly improves the washing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the harmful smoke safety protection device of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the guide ventilation plate of the utility model;

[0021] In the figure: 1. Storage tank; 2. Scrubber; 3. Condensation tank; 4. Activated carbon adsorption tower; 5. Gas phase temporary storage tank; 6. Incinerator; 7. One-way air outlet; 8. Safety pressure relief port; 9. Diversion ventilation plate; 10. Circulation pump; 11. Spray plate; 12. Impurity discharge pipe; 13. Scrubber inlet pipe; 14. Circulation pump inlet pipe; 15. Condenser; 16. Inclined ventilation plate; 17. Pressure relief pipe; 18. Vent; 19. Diversion ridge. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, the harmful smoke safety protection device includes a storage tank 1 connected to a condensation tank 3 through a washing tower 2, the condensation tank 3 is connected to a gas phase temporary storage tank 5 through an activated carbon adsorption tower 4, the gas phase temporary storage tank 5 is connected to the storage tank 1 through a pressure compensation pipe 17, a spray plate 11 is provided inside the washing tower 2, and an inclined ventilation plate 16 is provided inside the activated carbon adsorption tower 4. A one-way air outlet 7 and a safety pressure compensation port 8 are provided on the storage tank 1, and the pressure compensation pipe 17 is connected to the safety pressure compensation port 8. The one-way air outlet 7 is connected to the washing tower 2 through a washing tower inlet pipe 13, and an impurity discharge pipe 12 is connected to the bottom of the washing tower 2. A spray plate 11 is provided inside the washing tower 2, and the washing tower 2 is connected to a circulation pump 10 through a circulation pump inlet pipe 14, and the circulation pump 10 is connected to the spray plate 11 through a pipe. The gas treated by the activated carbon adsorption tower 4 is temporarily stored in the gas phase temporary storage tank 5 to maintain the pressure balance in the storage tank 1. As shown Figure 2 As shown, a guide ventilation plate 9 is provided below the spray plate 11, and a vent hole 18 and a guide rib 19 are provided on the guide ventilation plate 9. A condenser 15 is provided inside the condensation tank 3, and the gas phase temporary storage tank 5 is connected to the incinerator 6 through a pipeline.

[0025] The harmful smoke safety protection device, when in operation, comprises the following steps:

[0026] (1) The harmful gas generated in the storage tank 1 enters the washing tower 2 through the one-way gas outlet 7, and the circulating pump 10 and the spray plate 11 start working to wash the harmful gas. The guide ventilation plates 9 are staggered to increase the washing time of the harmful gas in the washing tower 2; (2) The gas after washing enters the condensation tank 3 through the pipeline, and the condenser 15 starts working, and then enters the activated carbon adsorption tower 4 for treatment. The gas after treatment enters the gas phase temporary storage tank 5 for temporary storage; (3) When the pressure in the storage tank 1 decreases, the gas in the gas phase temporary storage tank 5 enters the storage tank through the pressure compensation pipeline 17 to replenish it, and the remaining gas enters the incinerator 6 for treatment.

Claims

1. A harmful smoke safety protection device, characterized in that: The invention comprises a storage tank (1) connected to a condensation tank (3) via a washing tower (2), the condensation tank (3) connected to a gas phase temporary storage tank (5) via an activated carbon adsorption tower (4), the gas phase temporary storage tank (5) connected to the storage tank (1) via a pressure compensation pipeline (17), a spray plate (11) is provided inside the washing tower (2), and an inclined ventilation plate (16) is provided inside the activated carbon adsorption tower (4).

2. The harmful smoke safety protection device according to claim 1 is characterized in that: The storage tank (1) is provided with a one-way air outlet (7) and a safety pressure-compensating port (8), and a pressure-compensating pipe (17) is connected to the safety pressure-compensating port (8).

3. The harmful smoke safety protection device according to claim 2 is characterized in that: The one-way gas outlet (7) is connected to the washing tower (2) via a washing tower inlet pipeline (13), and an impurity discharge pipeline (12) is connected below the washing tower (2).

4. The harmful smoke safety protection device according to claim 1 is characterized in that: The washing tower (2) is provided with a spray plate (11) inside. The washing tower (2) is connected to a circulation pump (10) through a circulation pump inlet pipeline (14), and the circulation pump (10) is connected to the spray plate (11) through a pipeline.

5. The harmful smoke safety protection device according to claim 4 is characterized in that: A guide ventilation plate (9) is provided below the spray plate (11), and a ventilation hole (18) and a guide rib (19) are provided on the guide ventilation plate (9).

6. The harmful smoke safety protection device according to claim 1 is characterized in that: The condensation tank (3) is provided with a condenser (15) inside, and the gas phase temporary storage tank (5) is connected to the incinerator (6) through a pipeline.

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