Coal tar production waste gas treatment device

Abstract

The utility model relates to the technical field of coal tar production environment-friendly equipment, in particular to a coal tar production waste gas treatment device which comprises a spraying tank, an aeration pipe is fixedly connected to one side of the bottom of the spraying tank, a first gas outlet pipe is fixedly connected to the top of the spraying tank, and the other end of the aeration pipe is connected with a first filter and a second filter respectively. The circulating box is fixedly connected with a pump, the input end of the pump penetrates through the circulating box, the output end of the pump is fixedly connected with a spraying pipe, the spraying pipe penetrates through the upper portion of the spraying tank, the first air outlet pipe is connected with a third filter and a fourth filter through a second three-way electromagnetic valve, and the third filter and the fourth filter are fixedly connected with one end of a second air inlet pipe. According to the waste gas treatment device, different components in waste gas generated in coal tar production are treated respectively, the utilization rate of absorption liquid is increased, peculiar smell in the waste gas is treated, and the waste gas treatment device is more environment-friendly after being discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment for coal tar production, in particular to a waste gas treatment device for coal tar production. Background Art

[0002] Coal tar is a by-product of coalification during the coking process. It has a pungent odor and is a dark brown viscous liquid. Coal tar is an organic mixture composed mainly of cyclic and heterocyclic compounds. Waste gas is generated during the production process. The main pollutants of these waste gases include hydrogen sulfide, phenols, benzene, ammonia and other organic waste gases. Currently, combustion purification method, condensation purification method, liquid absorption method, adsorption method, etc. are commonly used. Among them, the liquid absorption method uses an absorbent to absorb harmful substances in the waste gas into the liquid, thereby achieving the purpose of purifying the waste gas. However, the current liquid absorption equipment does not carry out targeted treatment for the components of the waste gas. The absorption liquid is used to absorb both organic waste gas and solid impurities, resulting in the absorption liquid being too turbid when it is not saturated with adsorption and cannot be used further. The utilization rate is low, and the absorption liquid cannot further treat the gas odor. A certain odor still exists after discharge. Therefore, further improvements are needed to address this shortcoming. Utility Model Content

[0003] In response to the above technical problems, the utility model provides a device for classifying and treating waste gas produced by coal tar according to its different components.

[0004] In order to solve the above technical problems, the utility model discloses a coal tar production waste gas treatment device, comprising a spray tank, a first air inlet pipe, one side of the bottom of the spray tank is fixedly connected to an aeration pipe, and the top is fixedly connected to a first air outlet pipe, one end of the aeration pipe passes through the spray tank and extends to the inside, and the other end is fixedly connected to the output end of the first filter and the second filter respectively, the first air inlet pipe is fixedly connected to the input end of the first filter and the second filter respectively through a first three-way solenoid valve, the bottom of one side of the spray tank is connected to a circulation box through a pipe, and the top of the circulation box is fixedly connected to the first filter. A pump is fixedly connected, and the input end of the pump passes through the circulation box and extends inward. The output end of the pump is fixedly connected to a spray pipe, and the spray pipe passes through the upper part of the spray tank and extends inward. The first air outlet pipe is fixedly connected to the input ends of the third filter and the fourth filter respectively through the second three-way solenoid valve. The output ends of the third filter and the fourth filter are fixedly connected to one end of the second air inlet pipe. The other end of the second air inlet pipe is fixedly connected to the lower part of the deodorizing tank and extends inward. The upper part of the deodorizing tank is fixedly connected to an atomizing pipe, and the top is fixedly connected to the second air outlet pipe.

[0005] Furthermore, an aeration head is fixedly connected to the lower portion of the aeration pipe located in the spray tank.

[0006] Furthermore, a spray head is fixedly connected to the lower portion of the spray pipe located in the spray tank.

[0007] Furthermore, an air outlet head is fixedly connected to the upper portion of the second air inlet pipe located inside the deodorizing tank.

[0008] Furthermore, an atomizing nozzle is fixedly connected to the lower portion of the atomizing pipe.

[0009] Furthermore, the output end of the first filter is fixedly connected to a first valve, and the output end of the second filter is fixedly connected to a second valve.

[0010] Furthermore, the output end of the third filter is fixedly connected to a third valve, and the output end of the fourth filter is fixedly connected to a fourth valve.

[0011] Furthermore, the input end of the pump is detachably connected to a filter head.

[0012] Furthermore, the filter elements in the third filter and the fourth filter are made of activated carbon.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The utility model classifies and treats solid particles such as smoke, acidic gases, organic solvents and odors according to the different components of the waste gas generated by coal tar production, thereby improving the utilization rate of each treatment material and increasing the treatment effect of the waste gas, preventing the absorption liquid from absorbing both solid particles and acidic gases, etc., causing the absorption liquid to be too turbid and unusable when it is not saturated with adsorption.

[0015] 2. The utility model connects the first and second filters as well as the third and fourth filters in parallel, which can be used alternately during the production process, making it convenient to clean and replace the filter element in the filter and ensuring the continuity of production; by setting up a circulation box, the absorption liquid can be recycled, thereby improving the utilization rate of the absorption liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the utility model.

[0017] In the figure: 1. Spray tank, 2. Deodorizing tank, 3. Circulation tank, 4. First filter, 5. Second filter, 6. Third filter, 7. Fourth filter, 8. First three-way solenoid valve, 9. Second three-way solenoid valve, 10. First valve, 11. Second valve, 12. Third valve, 13. Fourth valve, 14. Pump, 15. First air inlet pipe, 16. Aeration pipe, 1601, Aeration head, 17. Spray pipe, 1701, Spray head, 18. Second air inlet pipe, 1801, Air outlet head, 19. Atomizing liquid inlet pipe, 1901, Atomizing nozzle, 20. Filter head, 21. First air outlet pipe, 22. Second air outlet pipe. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 The coal tar production waste gas treatment device shown in the figure includes a spray tank 1 and a first air inlet pipe 15. Water or alkaline absorption liquid is contained in the lower part of the spray tank 1. An aeration pipe 16 is fixedly connected to one side of the bottom of the spray tank 1 and a first air outlet pipe 21 is fixedly connected to the top. One end of the aeration pipe 16 passes through the spray tank 1 and extends to the inside, and the other end is fixedly connected to the output end of the first filter 4 and the second filter 5 respectively. The first air inlet pipe 15 is fixedly connected to the input end of the first filter 4 and the second filter 5 respectively through the first three-way solenoid valve 8. The bottom of one side of the spray tank 1 is connected to the circulation box 3 through a pipeline, and the circulation box 3 is fixedly connected to a pump 14 The input end of the pump 14 passes through the circulation box 3 and extends inward, and the output end of the pump 14 is fixedly connected to the spray pipe 17. The spray pipe 17 passes through the upper part of the spray tank 1 and extends inward. The first air outlet pipe 21 is fixedly connected to the input ends of the third filter 6 and the fourth filter 7 respectively through the second three-way solenoid valve 9. The output ends of the third filter 6 and the fourth filter 7 are fixedly connected to one end of the second air inlet pipe 18. The other end of the second air inlet pipe 18 is fixedly connected to the lower part of the deodorizing tank 2 and extends inward. The upper part of the deodorizing tank 2 is fixedly connected to the atomizing pipe 19, and the top is fixedly connected to the second air outlet pipe 22. Coal tar deodorant circulates in the atomizing pipe 19.

[0020] In order to increase the aeration effect when the exhaust gas enters the absorption liquid, an aeration head 1601 is fixedly connected to the lower part of the aeration pipe 16 located in the spray tank 1.

[0021] In order to increase the contact area between the absorption liquid and the exhaust gas, the lower part of the spray pipe 17 located in the spray tank 1 is fixedly connected to a spray head 1701, which can make the absorption liquid more dispersed when spraying.

[0022] In order to increase the contact area between the exhaust gas and the deodorant, an air outlet head 1801 is fixedly connected to the upper portion of the second air inlet pipe 18 located inside the deodorizing tank 2 .

[0023] In order to increase the contact area between the exhaust gas and the deodorant, an atomizing nozzle 1901 is fixedly connected to the lower part of the atomizing tube 19, so that the deodorant contacts the exhaust gas in an atomized manner.

[0024] In order to facilitate alternating use, the output end of the first filter 4 is fixedly connected to a first valve 10 , and the output end of the second filter 5 is fixedly connected to a second valve 11 .

[0025] In order to facilitate alternating use, the output end of the third filter 6 is fixedly connected to a third valve 12 , and the output end of the fourth filter 7 is fixedly connected to a fourth valve 13 .

[0026] In order to prevent impurities in the absorption liquid from clogging the spray head 1701 , a filter head 20 is detachably connected to the input end of the pump 14 .

[0027] In order to absorb organic components and harmful substances in the exhaust gas, the filter elements in the third filter 6 and the fourth filter 7 are made of activated carbon.

[0028] It should be noted that the first three-way solenoid valve 8 and the second three-way solenoid valve 9 in this embodiment are both existing devices, and their specific structures will not be described in detail.

[0029] The working process of this embodiment is as follows:

[0030] The exhaust gas passes through the first air inlet pipe 15 and the first three-way solenoid valve 8 and enters the first filter 4 or the second filter 5 to filter and remove solid particulate impurities such as smoke and dust in the exhaust gas, and then enters the spray tank 1 through the aeration pipe 16. The exhaust gas is aerated in the absorption liquid through the aeration head 1601 and contacts with the absorption liquid sprayed from the spray head 1701 for deacidification, and then enters the third filter 6 or the fourth filter 7 through the first air outlet pipe 21. The activated carbon in the third filter 6 or the fourth filter 7 is responsible for adsorbing and removing organic components and harmful substances in the exhaust gas. Then the exhaust gas enters the deodorizing tank 2 through the second air inlet pipe 18. The atomizing nozzle 1901 on the upper part of the deodorizing tank 2 releases the deodorant in the atomizing pipe 19 in the form of droplets. The exhaust gas is fully in contact with the atomized deodorant to remove odor, and finally The air is discharged through the second air outlet pipe 22 at the top of the deodorizing tank 2. The circulation box 3 and the pump 14 can recycle the absorption liquid in the spray tank 1 until the absorption liquid is saturated and then replaced. The filter head 20 can prevent impurities in the absorption liquid from clogging the spray head 1701. During daily production, it is only necessary to control the first three-way solenoid valve 8 to use either the first filter 4 or the second filter 5. The same applies to the third filter 6 and the fourth filter 7. When it is necessary to clean or replace the filter element in the first filter 4, the first three-way solenoid valve 8 is controlled to close the channel to the first filter 4 and open the channel to the second filter 5. At the same time, the first valve 10 is closed and the second valve 11 is opened. The filter element in the first filter 4 can be replaced while production is in progress. If it is necessary to replace the second filter 5, the third filter 6, and the fourth filter 7, the above operations can be performed to complete the cleaning or replacement of the filter element.

Claims

1. A coal tar production waste gas treatment device, comprising a spray tank (1) and a first air inlet pipe (15), wherein one side of the bottom of the spray tank (1) is fixedly connected to an aeration pipe (16), and the top of the spray tank (1) is fixedly connected to a first air outlet pipe (21), characterized in that: One end of the aeration pipe (16) passes through the spray tank (1) and extends inward, and the other end is fixedly connected to the output ends of the first filter (4) and the second filter (5), respectively. The first air inlet pipe (15) is fixedly connected to the input ends of the first filter (4) and the second filter (5) through the first three-way solenoid valve (8). The bottom of one side of the spray tank (1) is connected to the circulation box (3) through a pipeline. A pump (14) is fixedly connected to the circulation box (3). The input end of the pump (14) passes through the circulation box (3) and extends inward. The output end of the pump (14) is fixedly connected to the circulation box (3). A spray pipe (17) is provided, the spray pipe (17) passes through the upper part of the spray tank (1) and extends inwardly, the first air outlet pipe (21) is fixedly connected to the input ends of the third filter (6) and the fourth filter (7) respectively through the second three-way solenoid valve (9), the output ends of the third filter (6) and the fourth filter (7) are fixedly connected to one end of the second air inlet pipe (18), the other end of the second air inlet pipe (18) is fixedly connected to the lower part of the deodorizing tank (2) and extends inwardly, the upper part of the deodorizing tank (2) is fixedly connected to an atomizing pipe (19), and the top is fixedly connected to a second air outlet pipe (22).

2. The coal tar production waste gas treatment device according to claim 1, characterized in that: The lower portion of the aeration pipe (16) located inside the spray tank (1) is fixedly connected to an aeration head (1601).

3. The coal tar production waste gas treatment device according to claim 1, characterized in that: The lower portion of the spray pipe (17) located inside the spray tank (1) is fixedly connected to a spray head (1701).

4. The coal tar production waste gas treatment device according to claim 1, characterized in that: An air outlet head (1801) is fixedly connected to the upper portion of the second air inlet pipe (18) located inside the deodorizing tank (2).

5. The coal tar production waste gas treatment device according to claim 1, characterized in that: The lower part of the atomizing pipe (19) is fixedly connected to an atomizing nozzle (1901).

6. The coal tar production waste gas treatment device according to claim 1, characterized in that: The output end of the first filter (4) is fixedly connected to a first valve (10), and the output end of the second filter (5) is fixedly connected to a second valve (11).

7. The coal tar production waste gas treatment device according to claim 1, characterized in that: The output end of the third filter (6) is fixedly connected to a third valve (12), and the output end of the fourth filter (7) is fixedly connected to a fourth valve (13).

8. The coal tar production waste gas treatment device according to claim 1, characterized in that: The input end of the pump (14) is detachably connected to a filter head (20).

9. The coal tar production waste gas treatment device according to claim 1, characterized in that: The filter elements in the third filter (6) and the fourth filter (7) are made of activated carbon.

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