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Device for treating tail gas containing mercaptan and thioether

A technology containing mercaptans and sulfides, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as adverse effects on operators and the environment, handling, and inability to handle sulfides, and reduce long-distance transportation costs. and pipeline corrosion risk, realize the effect of biochemical treatment, and large operation flexibility

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the device can only remove mercaptans and cannot handle thioethers; and the solvent and adsorbent that absorb mercaptans are not treated
Especially for adsorbents, during the replacement process, the adsorbed mercaptans will be partially desorbed, which will emit a lot of malodorous gas, which will have adverse effects on operators and the environment.

Method used

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  • Device for treating tail gas containing mercaptan and thioether
  • Device for treating tail gas containing mercaptan and thioether
  • Device for treating tail gas containing mercaptan and thioether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 The device for treating tail gas containing mercaptan and sulfide includes:

[0045] Liquid caustic soda supply device 1, is used for supplying the sodium hydroxide aqueous solution that mass fraction is 30%;

[0046]The desulfurizing agent supply device 2 is used for supplying the desulfurizing agent solution, the desulfurizing agent supplying device is provided with a desulfurizing agent feeding port and a stirring device, and is connected to a water source through a water inlet valve 21;

[0047] The sweetening tower 3 has an air inlet at the bottom, and the liquid caustic soda supply device 1 and the desulfurizing agent supply device 2 are connected at the top;

[0048] Desulfurization tower 4, the bottom is connected to the top of the sweetening tower 3, the top of the desulfurization tower 4 is connected to the desulfurizing agent supply device 2, and is provided with a gas outlet;

[0049] A liquid caustic soda inlet valve 11 is arranged on the...

Embodiment 2-3

[0074] Except the conditions shown in Table 2, other parameter settings are the same as in Example 1.

Embodiment 1-3

[0076]

[0077] It can be seen from Table 1 that the tail gas treated in Examples 1-3 has a removal rate of mercaptans of 97.4%-99.9%, and a removal rate of sulfides of 84.1%-86.8%. This proves that the device of the present invention can simultaneously remove mercaptans and thioethers, and has high removal efficiency for thioethers and mercaptans.

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PUM

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Abstract

The invention belongs to the technical field of gas separation through gas-liquid contact, and particularly relates to a device for treating tail gas containing mercaptan and thioether. The device for treating the tail gas containing the mercaptan and the thioether comprises a liquid caustic soda supply device; a desulfurizing agent supply device; an air inlet is formed in the bottom of the sweetening tower, and the top is communicated with a liquid caustic soda supply device and a desulfurizer supply device; the bottom of the desulfurization ether tower is communicated with the top of the mercaptan removal tower, the top of the desulfurization ether tower is communicated with a desulfurizer supply device, and the desulfurization ether tower is provided with a gas outlet. When the device is used for treating the tail gas containing mercaptan and thioether, equipment corrosion cannot be caused at the high temperature, meanwhile, the operation flexibility is high, closed operation can be achieved for replacement of a desulfurizing agent, and drifting of odor cannot be generated.

Description

technical field [0001] The invention belongs to the technical field of gas separation by gas-liquid contact, and in particular relates to a device for treating tail gas containing mercaptan and sulfide. Background technique [0002] The petrochemical industry plays a pivotal role in my country's national economy, but at the same time, the petrochemical industry is a "high consumption, high pollution, and high emission" industry, which has caused great pollution to our country's atmospheric environment ("Petrochemical Ecological Industry Park Evaluation Index System and Design of Ecological Industry Chain", Zhao Yu, Energy and Environmental Protection, 2016, Vol. Research on the Emission Model and Treatment Scheme of Organic Volatile Compounds in the District", Wang Jinyue, master's degree thesis of Beijing University of Chemical Technology, 2017, abstract line 1-2, public date December 31, 2017). [0003] Among them, the problem of odor is becoming more and more serious ("Ana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/48B01D53/96
CPCB01D53/75B01D53/78B01D53/48B01D53/96B01D2257/306B01D2251/304B01D2251/604
Inventor 王萍萍陈林文凤柯月亮周美均
Owner CHINA PETROLEUM & CHEM CORP
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