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An organic waste gas recovery and treatment process and complete set of equipment

A technology for recovery and treatment of organic waste gas, applied in gas treatment, steam condensation, separation methods, etc., can solve problems such as gas cannot be compressed and condensed, difficult to condense, system collapse, etc.

Active Publication Date: 2020-10-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of certain non-condensable gases in the process of processing (methane, ethane, propane, etc. are difficult to condense under normal pressure and temperature), such gases cannot be compressed and condensed, and will accumulate in the processing device after long-term operation, eventually leading to system failure. collapse
[0007] In summary, the prior art has not yet dealt with the treatment process and technology for both high-concentration VOCs and sulfur-containing malodorous gases

Method used

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  • An organic waste gas recovery and treatment process and complete set of equipment
  • An organic waste gas recovery and treatment process and complete set of equipment
  • An organic waste gas recovery and treatment process and complete set of equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0103] Vaulted tanks in the heavy oil tank farm emit organic waste gas from time to time. The source of exhaust gas is the oil gas produced by the volatilization of oil in the heavy oil vault tank. The main pollutant composition (in terms of concentration) in the exhaust gas is the volatilized gas of alkane components, and the concentration of non-methane total hydrocarbons reaches 1.3×104mg / m 3 , of which alkanes account for 86%, most of which are condensable alkanes (carbon number about 5), with a concentration of 9600mg / m 3 , Aromatic compound 8200mg / m 3 , in which the non-condensable gas is mainly the pyrolysis product of the reaction process, about 3400mg / m 3 , average gas flow rate 10Nm 3 / h. The process equipment adopts figure 2 The process flow shown, where the membrane area is 35m 2 , the primary membrane is in the form of a roll-type membrane module, with an area of ​​30m 2 , secondary membrane 5m 2 Disc components are used. Activated carbon adsorption tank ...

Embodiment 2

[0109] Treat the exhaust gas from the catalytic cracking unit of the refinery and the breathing valve of the waste oil storage tank. The waste gas consists of 93% nitrogen and 7% hydrocarbons. Hydrocarbons mainly include alkanes, olefins, aromatics, ethers, and halogenated hydrocarbons, as well as sulfur-containing components such as hydrogen sulfide and mercaptans. The average gas flow rate is 100Nm 3 / h, device membrane area 130m 2 , primary membrane 100m 2 , which are five roll-type membrane modules connected in parallel, and the secondary membrane is a disc-type membrane module with a filling area of ​​30m 2 . The volume of each activated carbon adsorption tank is 4.5m 3 , using coconut shell activated carbon loaded with basic functional groups, the particle size is 2mm. Process device parameters such as temperature, pressure, flow rate, etc. are shown in Table 3. The total gas composition, total non-methane hydrocarbons and the concentration of representative compon...

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Abstract

The invention relates to an organic waste gas recovery treatment process and complete equipment. The complete equipment includes: an oil product storage tank, an alkali solution absorption unit, a gas blending tank, a three-phase separator, a primary membrane unit, an active carbon adsorption unit, a vacuum pump, a compressive condensation unit, a secondary membrane unit, a gas liquid separation tank, and an oil absorption column. In the method, firstly, sulfur-containing compounds in waste gas are removed through alkali-washing technology, and then through secondary membrane separation, a processing circulation and a compressive condensation unit are separated so as to avoid back-mixing of concentrated gas. The active carbon adsorption unit is used for recycling high-concentration VOCs from the waste gas. Through combination of oil absorption and the compressive condensation circulation, the process can absorb non-condensable gas without volatilization of an absorbent, so that a problem that the non-condensable gas cannot be recovered in the prior art is solved. The process can increase recovery rate and exhaust gas indices and meanwhile effectively reduces energy consumption, thus further developing application range of membrane technology. The process and the complete equipment have great application prospect in the field of organic gas recovery and treatment.

Description

technical field [0001] The invention relates to an organic waste gas recovery and treatment process and a complete set of equipment, which are mainly used in the treatment of sulfur-containing malodorous gas and high-concentration volatile organic compounds (VOCs) discharged by petrochemical refining and chemical enterprises in the process of production, oil product storage and transportation, loading and unloading Waste gas treatment and recycling. Background technique [0002] With the improvement of the country's economic level and the transformation of people's ideas, the environmental protection indicators of refining and chemical enterprises such as oil refining and chemical industry have been continuously improved. Refining and chemical enterprises have a large amount of volatilized organic compounds in the process of production, storage and transportation, which causes great environmental pollution and waste of resources. Among them, the volatile gases in the heavy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/48B01D53/04B01D53/22B01D53/14B01D5/00
CPCB01D5/00B01D53/226B01D53/229B01D53/48B01D53/78B01D2253/102B01D2259/40083
Inventor 魏昕栾金义杨永强杨丽卢姝
Owner CHINA PETROLEUM & CHEM CORP
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