Sulfonated tail gas treatment device

Abstract

The utility model relates to a sulfonated tail gas treatment device which comprises a tail gas pipe used for conveying sulfonated tail gas; the flow divider is arranged at the gas outlet end of the tail gas pipe, a gas guide channel is arranged in the flow divider, mixing channels are arranged in the flow divider and located at the two ends of the gas guide channel in a communicating mode, a flow dividing cavity is arranged in the flow divider and located on one side of the gas guide channel in a communicating mode, and the gas outlet end of the tail gas pipe extends into the flow dividing cavity. A gap between the outer wall of the tail gas pipe and the inner wall of the shunting cavity forms a shunting channel to control shunting of the sulfonated tail gas; after sulfonation tail gas is humidified by utilizing air, water mist is contacted with particulate matters to wet the particulate matters and form acid drops, so that the particulate matters are more easily removed, and in the process, not only can solid particulate matters be removed, but also pollutants such as SO2 can be effectively removed.

Description

Technical Field

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

[0002] In the sulfonation reactor, SO3 (diluted with dry air) is used as the sulfonating agent to sulfonate organic materials such as alkylbenzene, fatty alcohol or fatty alcohol polyoxyethylene ether to obtain the sulfonated material of the sulfonation reactor. The sulfonated material of the sulfonation reactor is subjected to gas-liquid separation in a gas-liquid static separator, and the obtained gas phase material is the sulfonated tail gas. The sulfonated tail gas contains air and entrained SO2, SO3, sulfate and other substances, which need to be treated before meeting the emission standards. The current treatment process mainly involves removing sulfate mist and SO3 from the sulfonated tail gas through an electrostatic demister, and then removing SO2 through an alkali washing tower before meeting the emission standards.

[0003] However, in the process of treating sulfonated tail gas with the existing technology, the electrostatic precipitator is often not effective, resulting in the sulfate particles carried in the tail gas of the electrostatic precipitator entering the alkali washing tower, causing the alkali washing tower to produce a large amount of foam, which affects the absorption of SO2 and causes a large amount of spray water consumption. The presence of a large amount of organic matter in the recovered liquid of the alkali washing tower also increases the difficulty of post-treatment. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a sulfonation tail gas treatment device. The specific technical scheme is as follows:

[0005] A sulfonation tail gas treatment device, comprising:

[0006] Tail gas pipe, used for conveying sulfonated tail gas;

[0007] A flow divider is arranged at the outlet end of the tail gas pipe, an air guide channel is arranged in the flow divider, a mixing channel is arranged in the flow divider and at both ends of the air guide channel, a flow divider cavity is arranged in the flow divider and at one side of the air guide channel, the outlet end of the tail gas pipe extends into the flow divider cavity, and a gap between the outer wall of the tail gas pipe and the inner wall of the flow divider cavity forms a flow divider channel to control the flow diversion of the sulfonated tail gas;

[0008] An air outer pipe is arranged outside the diverter, and the air outer pipe is connected with the mixing channel to allow air to mix with the diverted sulfonated tail gas;

[0009] The mixer is arranged on a side of the flow divider away from the tail gas pipe, the mixer is connected to the gas outlet end of the mixing channel, and a fixed pipe connected to the electrostatic demister is arranged at the bottom of one side of the mixer.

[0010] As an improvement of the above technical solution, a narrow portion is provided on the mixing channel, and the narrow portion is connected to the air outer tube.

[0011] As an improvement of the above technical solution, the air outlet direction of the mixing channel is tangent to the inner wall of the mixer.

[0012] As an improvement of the above technical solution, the side of the diversion cavity opposite to the exhaust pipe outlet end is in an arc-shaped structure.

[0013] As an improvement of the above technical solution, the two groups of mixing channels are arranged parallel to each other.

[0014] Beneficial effects of the utility model:

[0015] In the electrode capture stage of the electrostatic precipitator, the high-voltage electrostatic field charges the particles in the air and attracts them to the electrode plate. After the sulfonated tail gas is humidified by air, the water mist contacts the particles, moistening them and forming acid droplets, making them easier to remove. This process can not only remove solid particles, but also effectively remove pollutants such as SO2.

[0016] The sulfonated exhaust gas is blocked by the inner wall of the diversion chamber, so that the sulfonated exhaust gas is diverted into the diversion channel under obstruction, and then enters the air guide channel through the diversion channel, and is then transported to the mixing channel for preliminary mixing with the air. The air is transported to the mixing channel by an air outer pipe. The diverted sulfonated exhaust gas is easier to mix with the air, and finally enters the mixer to achieve secondary mixing, which can improve the mixing effect of air and sulfonated exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the overall structure of the utility model;

[0018] Figure 2 It is the front view of the overall structure of the utility model.

[0019] Figure numerals: 10, tail gas pipe; 20, diverter; 21, air guide channel; 22, mixing channel; 23, diverter chamber; 30, air outer pipe; 40, mixer; 41, fixed pipe; 50, electrostatic precipitator. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] A sulfonated tail gas treatment device comprises: a tail gas pipe 10 for conveying the sulfonated tail gas;

[0022] A splitter 20 is arranged at the outlet end of the tail gas pipe 10, an air guide channel 21 is arranged in the splitter 20, a mixing channel 22 is arranged in the splitter 20 and at both ends of the air guide channel 21, a splitter cavity 23 is arranged in the splitter 20 and at one side of the air guide channel 21, the outlet end of the tail gas pipe 10 extends into the splitter cavity 23, and the gap between the outer wall of the tail gas pipe 10 and the inner wall of the splitter cavity 23 forms a splitter channel to control the splitting of the sulfonated tail gas;

[0023] An air outer pipe 30 is disposed outside the diverter 20, and the air outer pipe 30 is connected to the mixing channel 22 to allow air to mix with the diverted sulfonated tail gas;

[0024] The mixer 40 is disposed on a side of the diverter 20 away from the exhaust pipe 10 . The mixer 40 is connected to the gas outlet end of the mixing channel 22 . A fixed pipe 41 connected to the electrostatic precipitator 50 is disposed at the bottom of one side of the mixer 40 .

[0025] The sulfonated tail gas is input into the diversion chamber 23 of the diverter 20 through the tail gas pipe 10. During the transportation of the sulfonated tail gas in the diverter 20, the inner wall of the diversion chamber 23 is used to block the sulfonated tail gas, so that the sulfonated tail gas is diverted into the diversion channel under obstruction, and then enters the air guide channel 21 through the diversion channel, and is then transported to the mixing channel 22 for preliminary mixing with the air. The air is transported to the mixing channel 22 by the air outer tube 30. The diverted sulfonated tail gas is more easily mixed with the air, and finally enters the mixer 40 to achieve secondary mixing, which can improve the mixing effect of the air and the sulfonated tail gas. After the sulfonated tail gas is humidified by air, the water mist contacts the particulate matter, making them wet and forming acid droplets, which are more easily removed in the electrostatic precipitator 50. This process can not only remove solid particulate matter, but also effectively remove pollutants such as SO2. After the sulfonated tail gas is humidified by air and then passes through the alkali washing tower, the SO2 concentration in the discharged tail gas is less than 1mg / Nm 3 , sulfuric acid mist content is less than 5mg / Nm 3 .

[0026] In one embodiment, a narrow portion is provided on the mixing channel 22, and the narrow portion is connected to the air outer tube 30. Specifically, when the gas encounters the narrowed narrow portion, the flow rate of the sulfonated exhaust gas increases, and the pressure next to the fluid decreases, generating suction. On the one hand, the air is sucked into the mixing channel 22, allowing the air to enter the mixing channel 22 and mix with the sulfonated exhaust gas. On the other hand, the sulfonated gas in the mixing channel 22 is prevented from entering the air outer tube 30.

[0027] In one embodiment, the air outlet direction of the mixing channel 22 is tangent to the inner wall of the mixer 40. After the two airflows in the two groups of mixing channels 22 enter the mixer 40, the two airflows form a lateral cut-in collision to increase the degree of mixing. The airflow flows downward along the mixer, and the airflow can also be made to flow in a rotating manner to form turbulent turbulence, thereby enhancing the mixing ability and further improving the mixing effect of air and sulfonated exhaust gas.

[0028] In one embodiment, the side of the diversion cavity 23 opposite to the exhaust end of the tail pipe 10 is in an arc-shaped structure, which can guide the airflow discharged from the tail pipe 10 and guide it into the diversion channel.

[0029] In one embodiment, the two groups of mixing channels 22 are arranged parallel to each other, which can effectively form a lateral cut-in hedging, thereby increasing the degree of mixing.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sulfonation tail gas treatment device, It is characterized in that include: A tail gas pipe (10) for conveying sulfonated tail gas; A flow splitter (20) is arranged at the outlet end of the tail gas pipe (10), an air guide channel (21) is arranged in the flow splitter (20), mixing channels (22) are arranged in the flow splitter (20) and are located at both ends of the air guide channel (21), a flow splitting cavity (23) is arranged in the flow splitter (20) and is located at one side of the air guide channel (21), the outlet end of the tail gas pipe (10) extends into the flow splitting cavity (23), and the gap between the outer wall of the tail gas pipe (10) and the inner wall of the flow splitting cavity (23) forms a flow splitting channel to control the flow splitting of the sulfonated tail gas; An air outer pipe (30) is arranged outside the diverter (20), and the air outer pipe (30) is connected to the mixing channel (22) to allow air to mix with the diverted sulfonated tail gas; A mixer (40) is arranged on a side of the flow divider (20) away from the tail gas pipe (10), the mixer (40) is connected to the gas outlet end of the mixing channel (22), and a fixed pipe (41) connected to the electrostatic demister (50) is arranged at the bottom of one side of the mixer (40).

2. A sulfonation tail gas treatment device according to claim 1, Features: The mixing passage (22) is provided with a narrow portion, and the narrow portion is communicated with the air outer tube (30).

3. A sulfonation tail gas treatment device according to claim 1, Features: The gas outlet direction of the mixing channel (22) is tangent to the inner wall of the mixer (40).

4. A sulfonation tail gas treatment device according to claim 1, Features: The side of the diversion cavity (23) opposite to the exhaust end of the tail gas pipe (10) is in an arc-shaped structure.

5. A sulfonation tail gas treatment device according to claim 1, Features: The two groups of mixing channels (22) are arranged parallel to each other.

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