Treatment device for fluorite drying tail gas

Abstract

The utility model relates to a fluorite drying tail gas treatment device which comprises a bag-type dust collector, an induced draft fan and a chimney, the bag-type dust collector, the induced draft fan and the chimney are communicated through pipelines, a spraying box is arranged on a gas outlet pipeline of the induced draft fan, a gas outlet of the spraying box is connected with a spiral pipe, the spiral pipe is communicated with the chimney through a pipeline, and a liquid inlet source of the spraying box is a circulating water tank. Liquid circulation is formed through a pipeline and a circulating pump, a circulating water tank is of a movable structure, and the circulating water tank is detachably connected with a spraying tank and the circulating pump through a hose and a hoop sleeve, so that on one hand, the problem of large peculiar smell in the fluorite tail gas treatment process can be effectively avoided, and on the other hand, the concentration of non-methane total hydrocarbon organic matter can be reduced; the method is a simple, economical and effective modification measure.

Description

Technical Field

[0001] The utility model belongs to the field of fluorite treatment and relates to tail gas treatment transformation of fluorite drying treatment. Background Art

[0002] Fluorite is the most important upstream raw material in the fluorine chemical industry chain. It is mostly used to prepare hydrofluoric acid, and then further prepare fluorine-containing inorganic salts and fluorine-containing organic chemicals. In the production of hydrofluoric acid, it is required to strictly control the water content of fluorite below a certain level, so the fluorite must be dried. Fluorite drying tail gas contains a large amount of dust and a small amount of sulfur dioxide; the tail gas treatment of the existing process is that the wet fluorite is sent to the tail of the drying furnace by a screw conveyor, and the hot air at the head of the furnace is reversely exchanged with the heat. In order to enhance the heat transfer effect, a shoveling plate is installed in the furnace, but the hot air still contains dust particles. After cyclone dust removal and bag dust removal, it is emptied through the chimney by the induced draft fan. This treatment method will cause the fluorite drying tail gas to contain non-methane total hydrocarbon organic matter. The excessive content of non-methane total hydrocarbon organic matter will cause the fluorite drying tail gas to have a large odor on the one hand, and on the other hand, there will be certain environmental risks and hidden dangers, and there are certain difficulties in the unorganized tail gas emission. How to deal with the emission of fluorite tail gas to meet the standards has become an urgent issue. Utility Model Content

[0003] The utility model provides a device for processing fluorite drying tail gas, which is a modification of the existing fluorite tail gas processing solution.

[0004] The technical solution of the utility model is as follows: a treatment device for fluorite drying tail gas comprises a bag dust collector, an induced draft fan and a chimney. The bag dust collector, the induced draft fan and the chimney are connected via a pipeline. A spray box is arranged on the air outlet pipeline of the induced draft fan. The air outlet of the spray box is connected to a spiral tube. The spiral tube is connected to the chimney via a pipeline. The liquid inlet source of the spray box is a circulating water tank. Liquid circulation is formed through pipelines and a circulating pump. The circulating water tank is a movable structure. The connection with the spray box and the circulating pump adopts a detachable connection of a hose and a hoop.

[0005] Furthermore, the bottom plate of the spray box is inclined.

[0006] Preferably, the spray box nozzle adopts a vortex nozzle.

[0007] Furthermore, a discharge pipe is provided at the bottom of the circulating water tank, a valve is provided on the discharge pipe, and the discharge pipe is used to discharge materials into the sedimentation tank.

[0008] Furthermore, the circulating water tank is electrically driven and is provided with a battery and a control box.

[0009] The beneficial effects of the utility model are: on the one hand, it can effectively avoid the problem of strong odor in the process of fluorite tail gas treatment, on the other hand, it can reduce the concentration of non-methane total hydrocarbon organic matter, effectively improve environmental protection emission standards and reduce the harm of odor to the health of workers. The invention is a simple, economical and effective transformation measure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the composition of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1 A treatment device for fluorite drying tail gas comprises a bag dust collector 1, an induced draft fan 2, and a chimney 3. The bag dust collector 1, the induced draft fan 2, and the chimney 3 are connected through a pipeline. A spray box 4 is arranged on the outlet pipeline of the induced draft fan 2, and a vortex nozzle is arranged in the spray box 4. The air outlet of the spray box 4 is connected to a spiral tube 5, and the spiral tube 5 is connected to the chimney 3 through a pipeline. The liquid inlet source of the spray box 4 is a circulating water tank 6. The model of the liquid outlet pipe at the bottom of the spray box 4 is DN200. The bottom of the DN200 is connected to a hose, and the hose is connected to the top of the circulating water tank 6. The side wall of the circulating water tank 6 is connected to a pipeline and a circulating pump 7. The outlet of the circulating pump 7 is connected to the vortex nozzle through a pipeline. The circulating water tank 6 is a movable structure, and the connection with the spray box 4 and the circulating pump 7 adopts a detachable connection of a hose and a hoop. The function of the spiral tube 5 is that the humidity of the spray box 4 is high, and the tail gas becomes saturated gas. The water vapor brought out can be condensed through the spiral tube 5 and return to the spray box 4, and will not condense and accumulate water in the chimney 3 at the bottom of the chimney.

[0012] The bottom plate of the spray box 4 can be tilted to drain quickly and prevent sedimentation. A discharge pipe is provided at the bottom of the circulating water tank 6, and a valve is provided on the discharge pipe. The discharge pipe is used to discharge materials to the sedimentation tank 8. The circulating water tank 6 is preferably electrically driven and is provided with a battery and a control box 9.

[0013] Liquid circulation is formed through the pipeline and the circulating pump 7, and the spray box 4 sprays and removes dust on the tail gas from the induced draft fan 2. The circulating water tank 6 is replaced regularly (prepare 2, one for use and one for backup). The circulating water tank 6 is movable, which is aimed at the transformation of existing technology. The pipeline changes are as little as possible and are set to be movable. When it is far away from the sedimentation tank 8, there is no need to increase the length of the pipeline, which can greatly reduce the transformation cost for chemical companies. The sediment in the sedimentation tank 8 is regularly cleaned to the fluorite warehouse, dried and loaded after drying.

Claims

1. A fluorite drying tail gas treatment device, comprising a bag dust collector (1), an induced draft fan (2), and a chimney (3), wherein the bag dust collector (1), the induced draft fan (2), and the chimney (3) are connected via a pipeline, wherein A spray box (4) is arranged on the air outlet pipe of the induced draft fan (2); the air outlet of the spray box (4) is connected to a spiral pipe (5); the spiral pipe (5) is connected to the chimney (3) via a pipe; the liquid inlet of the spray box (4) is a circulating water tank (6); liquid circulation is formed through the pipe and the circulating pump (7); the circulating water tank (6) is a movable structure, and is connected to the spray box (4) and the circulating pump (7) by a detachable connection of a hose and a hoop.

2. The fluorite drying tail gas treatment device according to claim 1 is characterized in that The bottom plate of the spray box (4) is inclined.

3. The fluorite drying tail gas treatment device according to claim 1 is characterized in that The spray box (4) is used and the spray head is a vortex spray head.

4. The fluorite drying tail gas treatment device according to claim 1 is characterized in that A discharge pipe is provided at the bottom of the circulating water tank (6), a valve is provided on the discharge pipe, and the discharge pipe is used to discharge material into the sedimentation tank (8).

5. The fluorite drying tail gas treatment device according to claim 1 is characterized in that The circulating water tank (6) is electrically driven and is provided with a battery and a control box (9).

6. The fluorite drying tail gas treatment device according to claim 1 is characterized in that The liquid outlet pipe at the bottom of the spray box (4) is DN200.

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