Volatile organic compound (VOCs) waste gas resource utilization method and device

A technology for organic volatiles and waste gas, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. The effect of loss volume

Inactive Publication Date: 2019-05-31
HENAN CHEM IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, alkali absorption is only suitable for the absorption of acidic VOCs gas, and the absorption effect of spray absorption is poor. At the same time, the treatment of adsorption waste residue generated in the adsorption process is still a difficult problem

Method used

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  • Volatile organic compound (VOCs) waste gas resource utilization method and device
  • Volatile organic compound (VOCs) waste gas resource utilization method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The VOCs composition of industrial waste gas is toluene 650mg / m 3 , Benzene 1050 mg / m 3 , xylene 410 mg / m 3 ; The absorbent ionic liquid is 1-butyl-3-methylimidazolium tetrafluoroborate, with a melting point of -82°C, a density of 1.17g / ml, and a viscosity of 233cP. Put the absorbent into the fresh absorbent storage tank 1-9, the amount of the added absorbent is always kept at the upper limit of the liquid level of the fresh absorbent storage tank 1-9, the temperature of the absorbent is controlled at 10-15°C, and the second-stage and second-stage Micro-mixing reactor 1-5, after the operation is stable, start fresh absorbent circulation pump 1-8, flow control 2000L / h, after 1-7 in the secondary absorbent storage tank reaches the upper limit of the absorbent liquid level, start a First-stage second-stage micro-mixing reactor 1-4, after the operation is stable, turn on the second-stage circulating pump 1-6 to control the flow rate of 2000L / h, and turn on the absorbent a...

Embodiment 2

[0036] The VOCs composition of industrial waste gas is n-hexane 777mg / m 3 , pentadiene 380 mg / m 3 , Isooctane 210 mg / m 3 ; The absorbent ionic liquid is 1-butyl-3-methylimidazolium hexafluorophosphate, with a melting point of -8°C, a density of 1.36g / ml, and a viscosity of 312cP. Operate according to the process in Example 1, the temperature of the absorbent is controlled at 20°C, the flow rate of the absorbent is controlled at 1000L / h, and the air volume of the gas is 1000m 3 / h, the temperature of the film scraper evaporator is 80°C, and the vacuum degree is 20-30Kpa. The VOC content in the exhaust gas after treatment is 32mg / m of n-hexane 3 , pentadiene 58mg / m 3 , Isooctane 14.5 mg / m 3

Embodiment 3

[0038] The VOCs composition of industrial waste gas is methanol 2100mg / m 3 , ethanol 1100 mg / m 3 , ethyl acetate 530 mg / m 3 ; The absorbent ionic liquid is 1-propyl-3-methylimidazolium hexafluorophosphate, with a melting point of 40°C. Operate according to the process in Example 1, the temperature of the absorbent is controlled at 60°C, the flow rate of the absorbent is controlled at 2000L / h, and the air volume of the gas is 500m 3 / h, the temperature of the film scraper evaporator is 100°C, and the vacuum degree is 30-35Kpa. The VOC content in the exhaust gas after treatment is methanol 106mg / m 3 , ethanol 65 mg / m 3 , ethyl acetate 25 mg / m 3 .

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Abstract

The invention relates to a volatile organic compound (VOCs) waste gas resource utilization method and device. The method is characterized by comprising the following steps that a fresh absorbent is loaded into a fresh absorbent tank, the amount of the added absorbent is kept at the upper limit of the liquid level of the fresh absorbent tank all the time, a second-level second-order micro-mixing reactor is started, an absorbent circulating pump is started after operation is stable, a first-level second-order micro-mixing reactor is started when the absorbent in the second-order absorbent tank reaches the upper limit of the liquid level, a second-level circulating pump is started after operation is stable, and when the absorbent in a first-level absorbent tank reaches the upper limit of theliquid level, a high-pressure magnetic suspension fan is started to start VOCs absorption; a first-level circulating pump is started, the absorbent is pumped into an inlet of a film scraper evaporator, and the film scraper evaporator starts to be heated; a condenser is started, and an organic solvent obtained after cooling enters a recovered solvent receiving tank; running is conducted continuously according to the process, and the absorbed tail gas reaching the standard is emptied.

Description

technical field [0001] The invention relates to a resource utilization method for recycling organic volatile compound (VOCs) waste gas by absorption method, which belongs to the field of chemical environmental protection, and specifically relates to a resource utilization method and device for organic volatile compound (VOCs) waste gas. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point below 260°C at normal pressure, or all organic compounds with corresponding volatility at normal temperature. Long-term exposure to an environment polluted by volatile organic compounds (VOCs) can cause chronic poisoning, damage the liver and nervous system, cause general weakness, drowsiness, and itchy skin. Benzene and xylene can also damage the hematopoietic system and even cause leukemia. More importantly, studies have shown that VOCs are important precursor...

Claims

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Application Information

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IPC IPC(8): B01D53/14
Inventor 成兰兴王柏楠赵怡丽张圆春赵增兵杨舒程武臻陈波杜玉杰高青环袁竹青周涛祝捷郝一影陈天天侯智勇邵国斌郭歌王运熙苏红丽王泽涛王亚洁
Owner HENAN CHEM IND RES INST
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