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Method for treating sulfur- and hydrocarbon-containing foul waste gas

A treatment method and exhaust gas technology, applied in separation methods, chemical instruments and methods, containers, etc., can solve problems such as danger and safety, and achieve the effects of compensating for temperature reduction, increasing the concentration of regeneration gas, and not producing secondary pollution

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this patent is aimed at the purification of hydrocarbon waste gas with high concentration, there are also the above-mentioned dangerous safety problems caused by excessive heat of adsorption

Method used

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  • Method for treating sulfur- and hydrocarbon-containing foul waste gas
  • Method for treating sulfur- and hydrocarbon-containing foul waste gas
  • Method for treating sulfur- and hydrocarbon-containing foul waste gas

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The concentration of organic sulfide DMDS in the breathing gas of a sulfur-containing sewage tank is 200mg / m 3 , the hydrocarbon concentration is 30% (volume ratio), the absorption liquid adopts catalytic cracking diesel fraction with an initial boiling point of 150°C, and the absorption liquid-gas ratio is 100L / m 3 . The absorbent is cooled to 20°C, the adsorbent is silica gel and activated carbon, and the bed volume ratio is 1:1 for adsorption for 48 hours, then it is heated and regenerated in vacuum, and the regeneration gas returns to the exhaust gas inlet port, and the desorption rate can reach 95%. During regeneration, saturated steam with a temperature of 150°C passes between the adsorbent beds of the adsorption tower. After the exhaust gas is treated by this process, the total hydrocarbon concentration of the outlet gas is less than 120mg / m 3 , DMDS concentration cannot be detected after the absorption tower. Purified gas concentration and total emissions are...

Embodiment 2

[0043] Exhaust gas from a refining and chemical unit, in which the organic sulfide methyl sulfide is 50mg / m 3 , the total hydrocarbon concentration is 60% (volume ratio), and water vapor is 6%. The absorbent is ordinary second-line diesel with an initial boiling point of 190°C. After the diesel oil is cooled, the temperature is 10°C. After heat exchange between the exhaust gas and the rich absorption diesel oil, it enters the absorption tower for absorption, and the absorption liquid-gas ratio is 2L / m 3 , and then enter the adsorption tower for adsorption. The lower layer of the adsorption tower is made of modified silica gel, and the upper layer is activated carbon. The volume ratio of modified silica gel and activated carbon is 2:1. During regeneration, the steam heater temperature is 100°C, and the regeneration cycle is 72h. The regeneration gas is returned to the exhaust gas inlet. After purification by this process, the concentration of hydrocarbons in the exhaust gas ...

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Abstract

The invention discloses a method for treating sulfur- and hydrocarbon-containing foul waste gas. The waste gas enters a heat exchanger for cooling, condensed water is separated, the cooled waste gas enters an absorption tower to be absorbed by an absorbent distillate, a fresh absorbent exchanges heat with a rich absorbent discharged by the absorption tower and then is cooled by a cooling system, and the cooled absorbent enters the absorption tower; and the waste gas subjected to absorptive purification enters an adsorption tower for adsorptive purification, the adsorption tower is segmentally filled and respectively filled with silica gel adsorbents and activated carbon adsorbents, and heat exchangers are arranged among the adsorbents in each segment. The method can thoroughly purify the sulfur- and hydrocarbon-containing foul waste gas discharged by chemical engineering storage tanks, refining devices and the like, and has the advantages of simple treatment process and no potential safety hazard.

Description

technical field [0001] The invention relates to a treatment method for sulfur-containing and hydrocarbon-containing malodorous waste gas, in particular to a treatment method for treating hydrocarbon-containing malodorous waste gas by adopting an absorption and adsorption combined process, which is suitable for oil storage tanks, oily sewage tanks and hydrocarbon processing devices Purification and recycling of malodorous waste gas generated by etc. Background technique [0002] Refinery contains various storage tanks such as sulfur-containing sewage tanks, oil intermediate tanks, etc., which are important sources of odor gas emission. The odor gas emitted contains high concentrations of volatile hydrocarbons, a small amount of hydrogen sulfide, organic sulfide, ammonia Long-term activities of employees in an environment polluted by these substances may cause diseases such as the respiratory system, digestive system, and reproductive system, and may also cause body lesions an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/04B01D53/78B01D53/48B01D53/72B65D90/30
Inventor 郭兵兵刘忠生王海波刘璐任龙朴勇
Owner CHINA PETROLEUM & CHEM CORP
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