Chloromethane tail gas treatment device

Abstract

The utility model relates to the technical field of tail gas treatment devices, in particular to a chloromethane tail gas treatment device, which comprises a spray tower, a packing absorption tower, a desorption tower, a gas storage tank and a first control valve, the gas outlet of the spray tower is communicated with the packing absorption tower through a first pipeline, and the packing absorption tower is communicated with the desorption tower through a second pipeline; the desorption tower is communicated with a first control valve through a fourth pipeline, the first control valve is communicated with a gas storage tank through a sixth pipeline, the first control valve is communicated with a spray tower through a fifth pipeline, the second pipeline is communicated with the fourth pipeline through a third pipeline, a third control valve is arranged at the joint of the second pipeline and the third pipeline, and a first detection meter is arranged on the first pipeline; and a second detection meter is arranged on the fourth pipeline. The chloromethane tail gas treatment device can improve the chloromethane tail gas treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment devices, in particular to a chloromethane tail gas treatment device. Background Art

[0002] Chloromethane tail gas refers to the tail gas emitted in the process of industrial production using chloromethane as raw material or intermediate. This tail gas mainly contains chloromethane and other by-products. It is a colorless and easily liquefied gas, easily soluble in substances such as chloroform and ether, and is flammable and explosive. It also has serious harm to human health. Therefore, a chloromethane tail gas treatment device is needed to prevent chloromethane tail gas from being discharged into the air.

[0003] In the related art, methyl chloride tail gas is treated multiple times before being discharged. For example, application number CN218166485U discloses a methyl chloride tail gas treatment and recovery device, including a spray tower, a falling film absorption tower and a decomposition tower, wherein the spray tower is connected to the falling film absorption tower through a first pipeline, the falling film absorption tower is connected to the decomposition tower through a second pipeline, and the gas outlet at the top of the decomposition tower is connected to a methyl chloride gas storage tank, wherein the spray tower, the falling film absorption tower and the decomposition tower work together to achieve multiple absorption and treatment of the methyl chloride tail gas; however, the content of methyl chloride in the tail gas to be treated is different. When the content of methyl chloride is low, only simple treatment is required to meet the emission standard. At this time, the use of the spray tower, the falling film absorption tower and the decomposition tower may lead to an increase in the processing time. It can be seen that the efficiency of the related art in treating methyl chloride tail gas is low. Utility Model Content

[0004] In order to improve the chloromethane tail gas treatment efficiency, the utility model provides a chloromethane tail gas treatment device.

[0005] In the first aspect, the present application provides a chloromethane tail gas treatment device, which adopts the following technical solution:

[0006] A chloromethane tail gas treatment device comprises a spray tower, a packing absorption tower, a desorption tower, a gas storage tank and a first control valve.

[0007] The gas outlet of the spray tower is connected to the packed absorption tower through a first pipeline, the packed absorption tower is connected to the analysis tower through a second pipeline, the analysis tower is connected to the first control valve through a fourth pipeline, the first control valve is connected to the gas storage tank through a sixth pipeline, the first control valve is connected to the spray tower through a fifth pipeline, the second pipeline is connected to the fourth pipeline through a third pipeline, a third control valve is provided at the connection between the second pipeline and the third pipeline, a first test gauge is provided on the first pipeline, and a second test gauge is provided on the fourth pipeline.

[0008] Furthermore, it also includes a second control valve, which is arranged at the connection between the fifth pipeline and the gas inlet of the spray tower.

[0009] Further, the first detection meter is electrically connected to the third control valve, and the second detection meter is electrically connected to the first control valve and the second control valve.

[0010] Furthermore, the spray tower includes a tower body, a spray main pipe arranged on the outside of the tower body, a first spray branch pipe arranged on the inside of the tower body, a second spray branch pipe arranged on the inside of the tower body and a pump body arranged on the outside of the tower body, the second spray branch pipe is arranged in parallel below the first spray branch pipe, the first spray branch pipe and the second spray branch pipe are both connected to the spray main pipe, the spray main pipe is fixedly connected to the pump body, and nozzles are both arranged on the first spray branch pipe and the second spray branch pipe.

[0011] Furthermore, the nozzle includes a water inlet port and a spiral nozzle, and the spiral nozzle is connected to the first spray branch pipe and the second spray branch pipe through the water inlet port.

[0012] In summary, the utility model includes the following beneficial technical effects:

[0013] 1. The concentration of methyl chloride tail gas after the first treatment is detected in real time by the first detection meter, and the packed absorption tower treats the methyl chloride tail gas for the second time. When the first detection meter detects that the concentration of methyl chloride tail gas after the first treatment is still high, the methyl chloride tail gas is treated for the third time. At the same time, the second detection meter detects the methyl chloride tail gas after the third treatment again. If it still does not meet the emission standards, the cycle treatment is continued until the emission standards are met. When the concentration of methyl chloride tail gas after the first treatment meets the emission standards, the third treatment is not required and the methyl chloride tail gas can be directly collected. When the concentration of the treated methyl chloride tail gas is high, multiple cycle treatments are carried out, and when the concentration is low, it is directly collected and stored, so as to effectively improve the treatment efficiency.

[0014] 2. During the spraying process, the spraying is carried out through a spiral nozzle, which effectively improves the spraying effect by increasing the spraying area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a schematic structural diagram of a chloromethane tail gas treatment device.

[0016] Figure 2 The present invention is a schematic structural diagram of a spray tower provided by the utility model.

[0017] Figure 3 The present invention is a schematic structural diagram of a nozzle provided by the utility model.

[0018] The following are the descriptions of the reference numerals:

[0019] 1- spray tower, 101- tower body, 102- spray main pipe, 103- first spray branch pipe, 104- second spray branch pipe, 1041- nozzle, 10411- water inlet port, 10412- spiral nozzle, 10413- fastener, 105- pump body, 2- first test table, 3- first pipeline, 4- packing absorption tower, 5- second pipeline, 6- third pipeline, 7- analysis tower, 8- fourth pipeline, 9- gas storage tank, 10- second test table, 11- sixth pipeline, 12- fifth pipeline, 13- first control valve, 14- second control valve, 15- third control valve. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1 To Attachment Figure 3 This application is described in further detail.

[0021] After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of this application.

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In addition, in the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] The embodiments of the utility model are further described in detail below in conjunction with the accompanying drawings.

[0025] The utility model aims to provide a chloromethane tail gas treatment device, which can determine the corresponding treatment device through a concentration detection meter and a valve, thereby effectively improving the treatment efficiency of the chloromethane tail gas. Embodiment 1:

[0026] like Figure 1 The utility model discloses a chloromethane tail gas treatment device, comprising a spray tower 1, a packing absorption tower 4, a decomposition tower 7, a gas storage tank 9 and a first control valve 13.

[0027] A gas outlet is set at the top of the spray tower 1, and the gas outlet is connected to the bottom of the packed absorption tower 4 through the first pipeline 3. The first pipeline 3 is fixedly connected to the gas outlet of the spray tower 1 and the packed absorption tower 4 respectively. The gas outlet at the top of the packed absorption tower 4 is connected to the analysis tower 7 through the second pipeline 5. The analysis tower 7 is connected to the first control valve 13 through the fourth pipeline 8. The first control valve 13 is connected to the gas storage tank 9 through the sixth pipeline 11 to store the treated methyl chloride tail gas. The first control valve 13 is connected to the spray tower 1 through the fifth pipeline 12. The first test meter 2 is located on the first pipeline 3, and the second test meter 10 is located on the fourth pipeline 8.

[0028] It also includes a second control valve 14 and a third control valve 15. The second control valve 14 is arranged at the connection between the fifth pipeline 12 and the gas inlet of the spray tower 1, and the third control valve 15 is arranged at the connection between the second pipeline 5 and the third pipeline 6. The first control valve 13, the second control valve 14 and the third control valve 15 are arranged to effectively control the flow direction of the chloromethane tail gas.

[0029] The first test meter 2 is electrically connected to the third control valve 15 , and the second test meter 10 is electrically connected to the first control valve 13 and the second control valve 14 .

[0030] Working principle: the methyl chloride tail gas to be treated is input from the gas inlet of the spray tower 1, and the spray tower 1 performs the first treatment, i.e., spray treatment, on the methyl chloride tail gas. The vacuum pump (not shown in the figure) arranged at the top of the spray tower 1 extracts the methyl chloride tail gas after the spray treatment into the first pipeline 3. The first detection meter 2 arranged on the first pipeline 3 detects the concentration of the methyl chloride tail gas. After the detection, the methyl chloride tail gas passes through the packed absorption tower 4. The packed absorption tower 4 performs the second treatment on the methyl chloride tail gas and then enters the second pipeline 5. When the first detection meter 2 determines that the concentration of the methyl chloride tail gas does not meet the emission standard, the third control valve 15 opens the second pipeline 5 leading to the analysis tower 7 and closes the third pipeline 6, so that the methyl chloride tail gas enters the analysis tower 7. When the first detection meter 2 determines that the concentration of the methyl chloride tail gas meets the emission standard, the third control valve 15 opens the third pipeline 6, so that the methyl chloride tail gas enters the third pipeline 6; when the methyl chloride tail gas enters After entering the analysis tower 7, the analysis tower 7 treats the chloromethane tail gas for the third time. After the third treatment, the chloromethane tail gas enters the fourth pipeline 8 and is treated according to process A. Process A is: the second detection meter 10 located on the fourth pipeline 8 detects the chloromethane tail gas again. If it meets the emission standard, the first control valve 13 closes the fifth pipeline 12 and opens the sixth pipeline 11, so that the chloromethane tail gas enters the gas storage tank 9 through the sixth pipeline 11. If it does not meet the emission standard, it is treated according to process B. Process B is: the first control valve 13 opens the fifth pipeline 12 and closes the sixth pipeline 11, and the second control valve 14 opens the air inlet of the spray tower 1 at the same time, so that the chloromethane tail gas enters the spray tower 1 again through the fifth pipeline 12 for circulation treatment; when the chloromethane tail gas enters the third pipeline 6, it enters the fourth pipeline 8 and is treated again according to process A or process B until the chloromethane tail gas is treated, such as Figure 1 shown.

[0031] Beneficial effect: The concentration of methyl chloride tail gas after the first treatment is detected in real time by the first detection meter 2, and the packed absorption tower 4 treats the methyl chloride tail gas for the second time. When the first detection meter 2 detects that the concentration of methyl chloride tail gas after the first treatment is still high, the methyl chloride tail gas is treated for the third time. At the same time, the second detection meter 10 detects the methyl chloride tail gas after the third treatment again. If it still does not meet the emission standard, the cycle treatment is continued until the emission standard is met. When the concentration of methyl chloride tail gas after the first treatment meets the emission standard, there is no need to perform the third treatment through the analysis tower 7 and the methyl chloride tail gas can be directly collected; when the concentration of the treated methyl chloride tail gas is high, multiple cycle treatments are performed, and when the concentration is low, it is directly collected and stored, so as to effectively improve the treatment efficiency. Embodiment 2:

[0032] like Figure 2-Figure 3As shown, the spray tower 1 of the utility model includes a tower body 101, a spray main pipe 102 arranged outside the tower body 101, a first spray branch pipe 103 arranged inside the tower body 101, a second spray branch pipe 104 arranged inside the tower body 101 and a pump body 105 arranged outside the tower body 101, the first spray branch pipe 103 and the second spray branch pipe 104 are arranged in parallel, the two ends of the first spray branch pipe 103 and the second spray branch pipe 104 are respectively fixed on both sides of the inside of the tower body 101, and the first spray branch pipe 103 and the second spray branch pipe 104 are respectively fixed on both sides of the inside of the tower body 101. One end is connected with the spray main pipe 102, and the spray main pipe 102 is fixedly connected to the pump body 105 by a fastener (not a fastener 10413). A plurality of nozzles 1041 are arranged on the first spray branch pipe 103 and the second spray branch pipe 104. The nozzles 1041 are connected with the first spray branch pipe 103 and the second spray branch pipe 104 through the water inlet port 10411. The water inlet port 10411 is embedded in the first spray branch pipe 103 and the second spray branch pipe 104. When the methyl chloride tail gas is sprayed, the nozzles 1041 spray. Figure 2 As shown, by setting two spray branch pipes, the contact area between the chloromethyl tail gas and the spray liquid is effectively increased, thereby improving the purification effect.

[0033] The nozzle 1041 includes a water inlet port 10411 and a spiral nozzle 10412. The spiral nozzle 10412 is fixedly connected to the water inlet port 10411 through a fastener 10413. When the methyl chloride tail gas is sprayed, the spray liquid enters the spiral nozzle 10412 through the water inlet port 10411. Figure 3 As shown, the spiral nozzle 10412 has the characteristics of vortex injection, that is, it can perform circular injection in a plane to increase the injection area, effectively increasing the contact area between the spray liquid and the methyl chloride tail gas.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chloromethane tail gas treatment device, comprising a spray tower, a packed absorption tower, a desorption tower, a gas storage tank and a first control valve, characterized in that: The gas outlet of the spray tower is connected to the packed absorption tower through a first pipeline, the packed absorption tower is connected to the analysis tower through a second pipeline, the analysis tower is connected to the first control valve through a fourth pipeline, the first control valve is connected to the gas storage tank through a sixth pipeline, the first control valve is connected to the spray tower through a fifth pipeline, the second pipeline is connected to the fourth pipeline through a third pipeline, a third control valve is provided at the connection between the second pipeline and the third pipeline, a first test gauge is provided on the first pipeline, and a second test gauge is provided on the fourth pipeline.

2. A chloromethane tail gas treatment device according to claim 1, characterized in that: It also includes a second control valve, which is arranged at the connection between the fifth pipeline and the gas inlet of the spray tower.

3. A chloromethane tail gas treatment device according to claim 2, characterized in that: The first detection meter is electrically connected to the third control valve, and the second detection meter is electrically connected to the first control valve and the second control valve.

4. A chloromethane tail gas treatment device according to claim 1, characterized in that: The spray tower includes a tower body, a spray main pipe arranged on the outside of the tower body, a first spray branch pipe arranged on the inside of the tower body, a second spray branch pipe arranged on the inside of the tower body and a pump body arranged on the outside of the tower body. The second spray branch pipe is arranged in parallel below the first spray branch pipe. The first spray branch pipe and the second spray branch pipe are both connected to the spray main pipe, and the spray main pipe is fixedly connected to the pump body. Nozzles are arranged on the first spray branch pipe and the second spray branch pipe.

5. A chloromethane tail gas treatment device according to claim 4, characterized in that: The nozzle comprises a water inlet port and a spiral nozzle, and the spiral nozzle is connected to the first spray branch pipe and the second spray branch pipe through the water inlet port.

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