Rectification tail gas trapping device

Abstract

The utility model discloses a rectification tail gas trapping device, and belongs to the technical field of tail gas treatment. A rectification tail gas trapping device comprises a trapping cylinder; the adsorption cylinder is fixedly connected in the trapping cylinder; the condensation pipe is fixedly connected in the trapping cylinder, and the condensation pipe is positioned right below the adsorption cylinder; the material receiving box is fixedly connected to the bottom of the trapping barrel; the steam spraying pipe is fixedly connected to the trapping barrel, and the steam spraying pipe is positioned right above the adsorption barrel; the air inlet pipe is fixedly connected to the side wall of the trapping cylinder, and the air inlet pipe is located under the condensation pipe; according to the device, organic materials in the rectification tail gas are captured and recycled through the capturing cylinder, so that the recycling rate of the organic materials can be improved, the waste of products is reduced, the production cost is reduced, meanwhile, the captured tail gas is discharged, harmful organic matters in the tail gas can be reduced, and the pollution to the environment is reduced.

Description

Technical Field

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

[0002] 2,3-Dichloro-5-trifluoromethylpyridine (DCTF) is a very valuable organic intermediate developed in recent years and is widely used in pesticides, medicines, fine chemicals and other fields. In terms of pesticides, it is an intermediate for the production of low-toxic and high-efficiency herbicides, such as acetamiprid and high-efficiency fungicide. It is also a key intermediate for varieties such as high-efficiency insecticide acetamiprid and high-efficiency fungicide fluazifop.

[0003] The refining process of DCTF involves vacuum distillation, steam distillation, and multi-stage distillation. During the refining process, a large amount of volatile non-condensable steam enters the waste gas absorption system. Most of the waste gas is the volatilization of DCTF finished products, which may easily lead to reduced product yields and increased production costs. At the same time, the formation of wastewater and waste salt will increase the treatment cost. At the same time, some unabsorbed organic gases may enter the atmosphere, which may easily cause environmental pollution. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and to propose a distillation tail gas capture device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A distillation tail gas capture device, comprising:

[0007] Capture cylinder;

[0008] An adsorption cylinder is fixedly connected in the capture cylinder;

[0009] A condenser tube is fixedly connected to the collecting cylinder, and the condenser tube is located directly below the adsorption cylinder;

[0010] The material receiving box is fixedly connected to the bottom of the collecting cylinder;

[0011] A steam injection pipe is fixedly connected to the capture cylinder, and the steam injection pipe is located directly above the adsorption cylinder;

[0012] The air inlet pipe is fixedly connected to the side wall of the collecting cylinder, and the air inlet pipe is located directly below the condensing pipe.

[0013] Preferably, an exhaust pipe is fixedly connected to the top of the collection cylinder.

[0014] Preferably, a nozzle is fixedly connected to the steam spray pipe, a plurality of groups of the nozzles are evenly distributed on the steam spray pipe, and the steam outlet ends of the nozzles face the adsorption cylinder.

[0015] Furthermore, a liquid inlet pipe and a liquid discharge pipe are fixedly connected to the side wall of the collecting cylinder, and the liquid discharge pipe and the liquid inlet pipe are both connected to the condenser pipe.

[0016] Preferably, an overflow pipe and a discharge pipe are fixedly connected to the side wall of the material receiving box, and the overflow pipe is located directly above the discharge pipe.

[0017] Furthermore, a liquid level plate is fixedly connected to the side wall of the material receiving box.

[0018] Furthermore, the liquid level plate is a glass plate.

[0019] Furthermore, an adsorption filler is arranged in the adsorption cylinder, and the adsorption filler is any one of macroporous resin and activated carbon.

[0020] Compared with the prior art, the utility model provides a distillation tail gas capture device, which has the following beneficial effects:

[0021] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The utility model captures and recovers the organic materials in the distillation tail gas through the capture cylinder in the device, thereby improving the recovery rate of the organic materials, reducing product waste, and reducing production costs. At the same time, the exhaust gas after capture is discharged, which can reduce harmful organic matter in the exhaust gas and thus reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a distillation tail gas capture device proposed by the utility model;

[0023] Figure 2 The utility model is a cross-sectional view of a distillation tail gas capture device.

[0024] In the figure: 1. Capture cylinder; 101. Steam jet pipe; 1011. Nozzle; 102. Condenser; 1021. Drain pipe; 1022. Liquid inlet pipe; 103. Exhaust pipe; 104. Inlet pipe; 2. Material receiving box; 201. Liquid level plate; 202. Overflow pipe; 203. Drain pipe; 3. Adsorption cylinder. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Embodiment 1:

[0027] Reference Figure 1-Figure 2 , a distillation tail gas capture device, comprising:

[0028] Capture tube 1;

[0029] The adsorption cylinder 3 is fixedly connected in the capture cylinder 1;

[0030] The condenser tube 102 is fixedly connected to the collecting cylinder 1, and the condenser tube 102 is located directly below the adsorption cylinder 3;

[0031] The material receiving box 2 is fixedly connected to the bottom of the collecting cylinder 1;

[0032] The steam injection pipe 101 is fixedly connected to the capture cylinder 1, and the steam injection pipe 101 is located directly above the adsorption cylinder 3;

[0033] The air inlet pipe 104 is fixedly connected to the side wall of the collecting tube 1 , and the air inlet pipe 104 is located directly below the condensing pipe 102 .

[0034] An exhaust pipe 103 is fixedly connected to the top of the collecting cylinder 1 .

[0035] A nozzle 1011 is fixedly connected to the steam spray pipe 101 , and a plurality of groups of nozzles 1011 are evenly distributed on the steam spray pipe 101 , and the steam outlet ends of the nozzles 1011 face the adsorption cylinder 3 .

[0036] A liquid inlet pipe 1022 and a liquid discharge pipe 1021 are fixedly connected to the side wall of the collecting cylinder 1 , and the liquid discharge pipe 1021 and the liquid inlet pipe 1022 are both connected to the condenser pipe 102 .

[0037] An overflow pipe 202 and a discharge pipe 203 are fixedly connected to the side wall of the material receiving box 2 , and the overflow pipe 202 is located directly above the discharge pipe 203 .

[0038] A liquid level plate 201 is fixedly connected to the side wall of the material receiving box 2 .

[0039] The liquid level plate 201 is a glass plate.

[0040] Reference Figure 2 By means of the glass liquid level plate 201 arranged on the receiving box 2, the staff can conveniently observe the liquid level in the box and the stratification of water and captured oil layers.

[0041] The adsorption cylinder 3 is provided with an adsorption filler, and the adsorption filler is any one of macroporous resin and activated carbon.

[0042] Reference Figure 1-Figure 2 During use, the exhaust gas delivery pipe and the air intake pipe 104 are connected, and condensate is input through the liquid inlet pipe 1022. After the condensate passes through the condenser pipe 102, it is discharged from the liquid discharge pipe 1021. At this time, the exhaust gas input through the air intake pipe 104 will pass through the condenser pipe 102 for cooling;

[0043] During the cooling process, the condenser 102 cools the tail gas to remove part of the organic materials, and the remaining gas is adsorbed by the adsorption cylinder 3. The tail gas after adsorption is discharged through the exhaust pipe 103.

[0044] It should be noted that the exhaust pipe 103 can be connected to online monitoring and analysis.

[0045] After cooling for a period of time, steam is sprayed into the collecting tube 1 through the steam spray pipe 101, and the input steam will be sprayed out through the nozzle 1011, and the sprayed steam will blow on the adsorption filler in the adsorption tube 3. After blowing for a period of time, the material on the adsorption filler will be blown off and fall into the receiving box 2 under the condensation action of the condenser pipe 102. When the liquid in the receiving box 2 is full to the upper outlet of the material, the steam condensate overflows and is discharged through the overflow pipe 202. At this time, the amount of organic material in the lower layer of the receiving box 2 is relatively small. As time goes by, the organic material gradually accumulates. When it accumulates to a liquid level that can be effectively collected, it is discharged and collected through the discharge pipe 203.

[0046] It should be noted that during operation, the two sets of collectors are used separately in parallel and can be switched. During the purging process, the inlet of the air intake pipe 104 is connected to the spare collector, and then switched back when the spare collector is purged.

[0047] The organic materials in the distillation tail gas are captured and recovered by the capture tube 1 in the device, thereby improving the recovery rate of organic materials, reducing product waste, and lowering production costs. At the same time, the exhaust gas after capture is discharged, which can reduce harmful organic matter in the exhaust gas and thus reduce pollution to the environment.

[0048] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distillation tail gas capture device, characterized in that: include: Capture tube (1); An adsorption cylinder (3) is fixedly connected to the collection cylinder (1); A condenser tube (102) is fixedly connected to the collection tube (1), and the condenser tube (102) is located directly below the adsorption tube (3); A material receiving box (2) is fixedly connected to the bottom of the collecting cylinder (1); A steam injection pipe (101) is fixedly connected to the capture cylinder (1), and the steam injection pipe (101) is located directly above the adsorption cylinder (3); The air inlet pipe (104) is fixedly connected to the side wall of the collecting tube (1), and the air inlet pipe (104) is located directly below the condensing pipe (102).

2. A distillation tail gas capture device according to claim 1, characterized in that: An exhaust pipe (103) is fixedly connected to the top of the collection cylinder (1).

3. A distillation tail gas capture device according to claim 1, characterized in that: A nozzle (1011) is fixedly connected to the steam spray pipe (101), and a plurality of groups of the nozzles (1011) are evenly distributed on the steam spray pipe (101), and the steam outlet ends of the nozzles (1011) face toward the adsorption cylinder (3).

4. A distillation tail gas capture device according to claim 2, characterized in that: A liquid inlet pipe (1022) and a liquid discharge pipe (1021) are fixedly connected to the side wall of the collecting cylinder (1), and the liquid discharge pipe (1021) and the liquid inlet pipe (1022) are both connected to the condensing pipe (102).

5. A distillation tail gas capture device according to claim 1, characterized in that: An overflow pipe (202) and a discharge pipe (203) are fixedly connected to the side wall of the material receiving box (2), and the overflow pipe (202) is located directly above the discharge pipe (203).

6. A distillation tail gas capture device according to claim 5, characterized in that: A liquid level plate (201) is fixedly connected to the side wall of the material receiving box (2).

7. A distillation tail gas capture device according to claim 6, characterized in that: The liquid level plate (201) is a glass plate.

8. The device for collecting tail gas from distillation according to claim 1, characterized in that: An adsorption filler is arranged in the adsorption cylinder (3), and the adsorption filler is any one of a macroporous resin and activated carbon.

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