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Treatment method for stinky waste gas containing sulfides and hydrocarbons

A sulfide and exhaust gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as poor stability, tail gas discharge that cannot meet standards, and stricter requirements, so as to reduce load, improve utilization value, and improve The effect of treatment rate

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment process is technologically reasonable. The use of lye to remove hydrogen sulfide and some mercaptans can avoid the impact of these substances on the subsequent treatment process. The requirements of the treatment process are relatively strict, and the final tail gas sometimes fails to meet the emission standards

Method used

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  • Treatment method for stinky waste gas containing sulfides and hydrocarbons
  • Treatment method for stinky waste gas containing sulfides and hydrocarbons
  • Treatment method for stinky waste gas containing sulfides and hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Hydrogen sulfide 2000mg / m3 in waste gas from sour water tank area of ​​an oil refinery 3 , organic sulfide 150mg / m 3 , total hydrocarbon concentration 40×10 4 mg / m 3 , the flow rate is 200Nm 3 / h or so. use as figure 1 In the process flow shown, sodium hydroxide aqueous solution is used as the desulfurization absorption liquid in the desulfurization reactor, and fresh lye is replaced when the pH value of the working liquid drops to 9. The absorption tower is filled with Dg38 packing ring. The absorbent uses catalytic cracking gas oil fraction with a distillation range of 180-380°C, and the sulfur content in terms of sulfur mass is 0.8%. 3 / h at a temperature of 8°C. The rich absorbent discharged from the absorption tower is not regenerated, but directly used as the feed of the hydrotreating unit, which does not affect the normal operation of the hydrotreating unit, and can also increase the diesel yield of the hydrotreating unit.

[0038] After the malodorous ex...

Embodiment 2

[0040] According to the method described in Example 1, the absorption solvent used is FCC diesel with a sulfur content of 1.2%, the temperature of the absorption solvent diesel is 12°C, and other conditions are as described in Example 1.

[0041] After the malodorous waste gas is purified by the above process, the hydrogen sulfide purification rate in the waste gas is 100%, the organic sulfide removal rate is 99.9%, and the total hydrocarbon removal rate is >95%. The device has been continuously operated for 300 days, and the removal rate is stable.

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Abstract

The invention discloses a treatment method for stinky waste gas containing sulfides and hydrocarbons. The sulfides in the waste gas comprise hydrogen sulfide and organic sulfides. A combined treatment process of solvent absorption and alkali liquor absorption is adopted in the waste gas treatment; the absorption solvent adopted in the solvent absorption process is crude diesel oil fraction; the crude diesel oil fraction solvent is cooled to the temperature of between 10 DEG C below zero and 30 DEG C, then enters an absorption tower, and is in countercurrent contact with the stinky waste gas to absorb the hydrocarbons and the organic sulfides therein; the rich absorption solvent discharged from the absorption tower is not regenerated and directly enters a diesel oil hydro-treating device; and the gas phase discharged from the absorption tower enters an alkali liquor absorption device to absorb the hydrogen sulfide and the organic sulfides therein, and is finally emptied through an exhaust tube. The method has the advantages of simple flow, low cost, stable treatment effect and the like.

Description

technical field [0001] The invention relates to a treatment method for multi-component malodorous waste gas containing sulfides and VOCs, especially the physical purification and chemical purification of malodorous waste gas containing harmful components such as hydrogen sulfide, methyl mercaptan and other organic sulfides and hydrocarbons. combined treatment methods. Background technique [0002] In the process of processing crude oil, some facilities in the refinery inevitably emit a large amount of odorous pollutants, especially sulfur-containing sewage storage tanks, semi-finished oil storage tanks, dirty oil storage tanks, sweetening tail gas and other facilities. These facilities discharge The malodorous pollutants include hydrogen sulfide, organic sulfides, benzene series, and other VOCs (volatile organic compounds). Long-term activities of employees in an environment polluted by these substances may cause respiratory, digestive, and reproductive systems. When the po...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/48B01D53/72
Inventor 郭兵兵刘忠生王海波方向晨朴勇刘璐
Owner CHINA PETROLEUM & CHEM CORP
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