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A high-concentration intermittent discharge organic waste gas treatment process

A technology of organic waste gas and treatment process, which is applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., and can solve problems such as the inapplicability of high-concentration organic gases

Active Publication Date: 2017-06-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN200810094445.5 discloses a purification device for low-concentration wet scrubbing organic gas. The inventive device includes a washing tower, an oxidation treatment unit and a catalyst adsorption unit. The oxidation treatment unit can oxidize poorly water-soluble VOCs into CO 2 and H 2 O, or partial oxidation treatment for components with higher water solubility, but this method is only applicable to organic gases whose total hydrocarbon concentration ranges from 0.01 to 500ppm in general time, for intermittent emissions, and high-concentration organic gases Not applicable

Method used

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  • A high-concentration intermittent discharge organic waste gas treatment process
  • A high-concentration intermittent discharge organic waste gas treatment process
  • A high-concentration intermittent discharge organic waste gas treatment process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The composition of exhaust gas is H 2 S 2000mg / m 3 , NH 3 2000mg / m 3 , methyl mercaptan 100mg / m 3 , dimethyl sulfide 50mg / m 3 , ethanethiol 60mg / m 3 , volatile organic compounds 6000mg / m 3 ;Exhaust gas flow rate 0~100m 3 / h, average 60m 3 / h; normal temperature and pressure.

[0034] The composition of the absorption liquid is 0.1%wH 2 SO 4 , the oxidant is 5%w sodium hypochlorite, and its flow rate is 0.036m 3 / h.

[0035] Adsorbent is large particle coal-based activated carbon 1m 3 .

[0036] Processing effect:

[0037] Purified gas composition: H 2 S 0.8mg / m 3 , NH 3 2.0mg / m 3 , methyl mercaptan 0.5mg / m 3 , dimethyl sulfide 0.3mg / m 3 , ethanethiol 0.8mg / m 3 , volatile organic compounds 500mg / m 3 . Exhaust gas treatment capacity 1752km 3 / m 3 , see the attached picture for the actual effect figure 2 .

Embodiment 2

[0046] The composition of exhaust gas is H 2 S 1200mg / m 3 , NH 3 2000mg / m 3 , methyl mercaptan 60mg / m 3 , dimethyl sulfide 50mg / m 3 , ethanethiol 60mg / m 3 , volatile organic compounds 3600mg / m 3 ;Exhaust gas flow rate 0~100m 3 / h, average 60m 3 / h; normal temperature and pressure.

[0047] The composition of the absorption liquid is 0.1%wH 2 SO 4 , the oxidant is 5%w sodium chlorate, and its flow rate is 0.045m 3 / h.

[0048] Adsorbent is large particle coal-based activated carbon 1m 3 .

[0049] Processing effect:

[0050] Purified gas composition: H 2 S 0.5mg / m 3 , NH 3 2.0mg / m 3 , methyl mercaptan 0.4mg / m 3 Dimethyl sulfide 0.3mg / m 3 Ethanthiol 0.7mg / m 3 , volatile organic compounds 460mg / m 3 . Exhaust gas treatment capacity 3353km 3 / m 3 , see the attached picture for the actual effect Figure 4 .

Embodiment 3

[0059] The composition of exhaust gas is H 2 S 3000mg / m 3 , NH 3 2000mg / m 3 , methyl mercaptan 200mg / m 3 , dimethyl sulfide 100mg / m 3 , ethanethiol 80mg / m 3 , volatile organic compounds 6000mg / m 3 ;Exhaust gas flow rate 0~100m 3 / h, average 60m 3 / h; normal temperature and pressure.

[0060] The composition of the absorption liquid is 0.1%wH 2 SO 4 , the oxidant is 5%w sodium hypochlorite, and its flow rate is 0.04m 3 / h.

[0061] Adsorbent is large particle coal-based activated carbon 1m 3 .

[0062] Processing effect:

[0063] Purified gas composition: H 2 S 0.8mg / m 3 , NH 3 2.0mg / m 3 , methyl mercaptan 0.6mg / m 3 , dimethyl sulfide 0.3mg / m 3 , ethanethiol 0.8mg / m 3 , volatile organic compounds 500mg / m 3 . Exhaust gas treatment capacity 1528km 3 / m 3 , see the attached picture for the actual effect Figure 6 .

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Abstract

Organic exhaust gas intermittently discharged during a petroleum chemical production process is capable of limiting usage of a general malodorous gas processing technology and an organic gas processing technology, and is capable of leading to environmental pollution. The organic exhaust-gas treatment methods in prior art mainly comprise an adsorption method, an absorption method, a catalysis burning method, a condensation recovery method and a liquid phase catalytic oxidation. The above methods are respectively suitable for different objects, but are not suitable for processing high-density intermittent discharging organic exhaust-gas. A technical scheme of the invention is characterized in that an acidic absorption liquid is employed, an oxidizing agent NaClO or a NaClO3 solution capable of resolving a gas oxidizing agent is taken as an exhaust gas absorption liquid and timely added in the acidic absorption liquid, and then is accessed with an active carbon adsorption reactor after being absorbed, the decomposed gas oxidizing agent and an organic matter in exhaust gas are subjected to an oxidation reaction on an adsorbent, the liquid phase product is generated for purifying gas; the technology has the advantages that the adsorbent can be taken as a buffer container of the organic matter or the oxidizing agent, and is suitable for unstable exhaust gas discharge capacity and concentration.

Description

technical field [0001] The invention relates to a process for treating high-concentration and intermittently discharged organic waste gas, which belongs to the treatment process of organic waste gas, specifically a harmless treatment process for stable oxidation of high-concentration and intermittently discharged organic waste gas at low temperature. Background technique [0002] A large amount of organic waste gas is emitted in the petrochemical production process. The pollutant content in this kind of gas is high, and the emission is unstable or intermittent, which limits the use of general malodorous gas treatment process and organic gas treatment process. Cause environmental pollution, seriously affect the health of employees, and form a safety hazard in the factory area. [0003] Organic waste gas treatment methods mainly include adsorption method, absorption method, catalytic incineration method, condensation recovery method, liquid-phase catalytic oxidation, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/74B01D53/78B01D53/44B01D53/52B01D53/48B01D53/58
Inventor 王昆贾媛媛荣树茂刘发强刘光利梁宝锋文善雄江岩巫树锋李常青何琳张媛李晶蕊李杨
Owner PETROCHINA CO LTD
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