VOC (volatile organic compound) gas treatment device for coal-to-liquid rectification

Abstract

The utility model discloses a VOC (volatile organic compound) gas treatment device for coal-to-liquid rectification, which comprises a tank body, a spacer bush is arranged on the inner axis of the tank body, a spiral sheet is arranged between the spacer bush and the inner wall of the tank body, and the spiral sheet, the tank body and the spacer bush define a spiral airflow channel; a liquid supply pipe is arranged in the spacer bush in the axis direction, the lower portion of the liquid supply pipe is connected with a water pump, the water pump is fixedly connected with the bottom of the tank body, the pipe wall of the liquid supply pipe is communicated with a plurality of branch pipes, the branch pipes penetrate through the spacer bush, stretch into the airflow channel and are spirally distributed in the airflow channel, and spraying holes are evenly distributed in the pipe sections, located in the airflow channel, of the branch pipes; and the upper part of the tank body is provided with an air inlet corresponding to the airflow channel and an air outlet corresponding to the spacer bush. The VOC gas treatment device is remarkable in use effect, the contact time of VOC gas and washing liquid is prolonged, and then the VOC gas can be quickly and efficiently treated through filtration of the activated carbon layer and demisting of the wire mesh demister.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a VOC gas treatment device for coal-to-oil rectification. Background Technique

[0002] VOC waste gas is a kind of volatile organic compound waste gas. The control technologies for VOC waste gas treatment include combustion method, photocatalysis method, activated carbon adsorption method, absorption method, condensation method, biological treatment method, etc. Among them, the absorption method is to spray an adsorption solution in combination with VOC waste gas to remove harmful components, reduce the concentration of VOC gas, and achieve the up-to-standard discharge of waste gas;

[0003] The patent with the authorization announcement number CN218459084U discloses a VOC waste gas treatment spray scrubbing tower, including a base. The top of the base is provided with a spray scrubbing tower main body, and a partition is installed at the bottom end inside the spray scrubbing tower main body. A flow retarder seat is installed at the top of the partition. By setting a partition, during use, the interior of the spray scrubbing tower main body can be divided into two spray scrubbing areas by the partition, and in cooperation with the action of two groups of VOC waste gas inlet pipes, the VOC waste gas can be shunted. At the same time, by setting a first spray pipe, a second spray pipe and a third spray pipe, the spraying range of the VOC waste gas is improved. However, the VOC waste gas is introduced into the spray scrubbing area through the inlet pipe, and the contact time between the VOC waste gas and the spray scrubbing liquid is short. Subsequently, the VOC waste gas flows upward, and the use effect is average and needs to be improved. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects, provide a VOC gas treatment device for coal-to-oil rectification, with remarkable use effect, increase the contact time between the VOC gas and the washing liquid, and then through the filtration of the activated carbon layer and the demisting of the wire mesh demister, it can quickly and efficiently treat the VOC gas, and can effectively solve the problems in the background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: A VOC gas treatment device for coal-to-oil rectification, including a tank body. An inner sleeve is provided along the axis inside the tank body. The upper end of the inner sleeve is fixedly connected to the top wall of the tank body, and the lower end of the inner sleeve is open. A spiral sheet is provided between the inner sleeve and the inner wall of the tank body. The spiral sheet and the tank body and the inner sleeve enclose a spiral air flow channel; A liquid supply pipe is provided along the axis direction inside the inner sleeve. The lower part of the liquid supply pipe is connected to a water pump, and the water pump is fixedly connected to the bottom of the tank body. The pipe wall of the liquid supply pipe is communicated with a plurality of branch pipes. The plurality of branch pipes penetrate through the inner sleeve and extend into the air flow channel and are spirally distributed in the air flow channel. The pipe sections of the branch pipes located in the air flow channel are evenly provided with spraying holes; An air inlet corresponding to the air flow channel is provided at the upper part of the tank body, and an exhaust port corresponding to the inner sleeve is also provided at the upper part of the tank body.

[0006] Preferably, the lower part inside the tank stores the washing liquid, and the lower end of the partition sleeve is higher than the liquid level of the washing liquid; a grille plate is further provided at the bottom of the lower end of the partition sleeve, the liquid supply pipe passes through the grille plate, and an activated carbon layer is provided above the grille plate.

[0007] Preferably, a wire mesh demister is provided in the upper part inside the partition sleeve corresponding to the exhaust port.

[0008] Preferably, a liquid inlet pipe is provided at the lower part of the outer wall of the tank, and a valve is installed on the liquid inlet pipe.

[0009] Preferably, a liquid discharge pipe is provided at the bottom of the tank, and a valve is installed on the liquid discharge pipe.

[0010] Preferably, a liquid level sight glass is provided on the outer wall of the tank.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging spiral fins between the partition sleeve and the inner wall of the tank, the VOC gas flows through the air flow channel, fully contacts with the washing liquid sprayed by the branch pipe in the air flow channel, removes the harmful components in the VOC gas, increases the contact time between the VOC gas and the washing liquid, the washed VOC gas enters the partition sleeve, and after being filtered by the activated carbon layer and demisted by the wire mesh demister again, the VOC gas can be processed quickly and efficiently, and the use effect is remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model.

[0013] In the figure: 1 air inlet, 2 spiral fins, 3 tank, 4 liquid inlet pipe, 5 liquid supply pipe, 6 liquid discharge pipe, 7 water pump, 8 grille plate, 9 activated carbon layer, 10 branch pipe, 11 air flow channel, 12 partition sleeve, 13 exhaust port, 14 wire mesh demister. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The present utility model can be explained in detail through the following embodiments. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or positional relationship, they are only corresponding to the drawings of the present application, for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0015] Please refer to Figure 1, the present utility model provides a technical solution: a VOC gas treatment device for coal-to-oil rectification, including a tank body 3. An inner sleeve 12 is provided along the axis inside the tank body 3. The upper end of the inner sleeve 12 is fixedly connected to the top wall of the tank body 3, and the lower end of the inner sleeve 12 is open. A spiral fin 2 is provided between the inner sleeve 12 and the inner wall of the tank body 3. The spiral fin 2 and the tank body 3 and the inner sleeve 12 enclose a spiral air flow channel 11; A liquid supply pipe 5 is provided along the axis direction inside the inner sleeve 12. The lower part of the liquid supply pipe 5 is connected to a water pump 7, and the water pump 7 is fixedly connected to the bottom of the tank body 3. A plurality of branch pipes 10 are communicated with the pipe wall of the liquid supply pipe 5. The plurality of branch pipes 10 penetrate through the inner sleeve 12 and extend into the air flow channel 11 and are spirally distributed in the air flow channel 11. Spraying holes are evenly distributed on the pipe sections of the branch pipes 10 located in the air flow channel 11; An air inlet 1 corresponding to the air flow channel 11 is provided at the upper part of the tank body 3, and an exhaust port 13 corresponding to the inner sleeve 12 is also provided at the upper part of the tank body 3;

[0016] It can be understood that the VOC gas is blown into the tank body 3 through the air inlet 1 by an external blower. The VOC gas flows through the air flow channel 11. The water pump 7 extracts the washing liquid at the bottom inside the tank body 3 and then pumps it into the plurality of branch pipes 10 through the liquid supply pipe 5. Since the plurality of branch pipes 10 are spirally arranged in the air flow channel 11, the VOC gas in the air flow channel 11 is in full contact with the washing liquid sprayed by the branch pipes 10, increasing the contact time between the VOC gas and the washing liquid, effectively neutralizing and removing the harmful components in the VOC gas. The VOC gas after washing enters the inner sleeve 12 and then is discharged through the exhaust port 13, which can quickly and efficiently treat the VOC gas, and the use effect is remarkable;

[0017] Further, the washing liquid is stored in the lower part inside the tank body 3. The lower end of the inner sleeve 12 is higher than the liquid level of the washing liquid, avoiding the washing liquid blocking the lower end opening of the inner sleeve 12 and causing the gas to not pass through; A grid plate 8 is also provided at the bottom of the lower end of the inner sleeve 12. The liquid supply pipe 5 passes through the grid plate 8. An activated carbon layer 9 is provided above the grid plate 8, and the activated carbon layer 9 can adsorb and filter the gas again;

[0018] Further, a wire mesh demister 14 is provided corresponding to the exhaust port 13 in the upper part of the inner sleeve 12 to dry the gas and reduce the water mist;

[0019] Further, a liquid inlet pipe 4 is provided at the lower part of the outer wall of the tank body 3, and a valve is installed on the liquid inlet pipe 4; A drain pipe 6 is provided at the bottom of the tank body 3, and a valve is installed on the drain pipe 6; The liquid inlet pipe 4 is used to supplement the washing liquid to the tank body 3, and the drain pipe 6 is used to discharge the washing liquid, facilitating subsequent maintenance;

[0020] In addition, a liquid level gauge is provided on the outer wall of the tank body 3 to observe the liquid level of the washing liquid and avoid exceeding the lower end of the inner sleeve 12.

[0021] The parts not described in detail in this utility model are prior arts. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, aiming to include all changes falling within the meaning and scope of equivalent elements in the content of this utility model.

Claims

1. A VOC gas treatment device for coal-to-liquid distillation, comprising a tank body (3), characterized in that: A spacer (12) is provided on the inner axis of the tank body (3); the upper end of the spacer (12) is fixedly connected to the top wall of the tank body (3); the lower end of the spacer (12) is open; a spiral sheet (2) is provided between the spacer (12) and the inner wall of the tank body (3); the spiral sheet (2), the tank body (3) and the spacer (12) form a spiral air flow channel (11); a liquid supply pipe (5) is provided on the inner axis of the spacer (12); the lower part of the liquid supply pipe (5) is connected to a water pump (7); the water pump (7) is connected to the tank body (3) The bottom is fixedly connected, the wall of the liquid supply pipe (5) is connected to a plurality of branch pipes (10), the plurality of branch pipes (10) penetrate the spacer sleeve (12) and extend into the air flow channel (11), and are spirally distributed in the air flow channel (11), and the pipe sections of the branch pipes (10) located in the air flow channel (11) are uniformly distributed with spray holes; the upper part of the tank body (3) is provided with an air inlet (1) corresponding to the air flow channel (11), and the upper part of the tank body (3) is also provided with an exhaust port (13) corresponding to the spacer sleeve (12).

2. A VOC gas treatment device for coal-to-liquid distillation according to claim 1, characterized in that: The tank body (3) stores washing liquid in the lower part, and the lower end of the spacer (12) is higher than the liquid level of the washing liquid; a grid plate (8) is also provided at the bottom of the lower end of the spacer (12), and the liquid supply pipe (5) passes through the grid plate (8), and an activated carbon layer (9) is provided on the upper part of the grid plate (8).

3. A VOC gas treatment device for coal-to-liquid distillation according to claim 1, characterized in that: A wire mesh demister (14) is provided at the upper inner portion of the spacer (12) corresponding to the exhaust port (13).

4. A VOC gas treatment device for coal-to-liquid distillation according to claim 1, characterized in that: A liquid inlet pipe (4) is provided at the lower portion of the outer wall of the tank body (3), and a valve is installed in the liquid inlet pipe (4).

5. A VOC gas treatment device for coal-to-liquid distillation according to claim 1, characterized in that: A liquid discharge pipe (6) is provided at the bottom of the tank body (3), and a valve is installed on the liquid discharge pipe (6).

6. A VOC gas treatment device for coal-to-liquid distillation according to claim 1, characterized in that: The outer wall of the tank body (3) is provided with a liquid sight glass.

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