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Soybean oil absorption liquid for VOC waste gas treatment, absorption method and separation and recovery method

A waste gas treatment, soybean oil technology, applied in the direction of gas treatment, separation method, dispersed particle separation, etc., can solve the problems that limit the large-scale application of oil-water mixed absorption liquid, cumbersome recovery process, difficult regeneration, etc., and achieve easy implementation and good absorption effect, the effect of reducing the preparation cost

Inactive Publication Date: 2019-12-31
义乌韦陀环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure organic solvent (oil) absorbing liquid has the defects of flammability, high viscosity and high price, which seriously limits the large-scale application of pure organic solvent absorbing liquid; water and surfactant mixed as absorbing liquid will reduce the absorption of VOC Smaller, the cost is higher in practical application; the oil-water mixed absorption liquid shows a stable emulsion state due to the large amount of surfactant, and the physical oil-water separator cannot effectively separate it, and chemical reagents need to be added to break the emulsion before separation The oil phase is produced, and then the regeneration of the oil phase is realized, resulting in cumbersome recovery process, high cost, difficult regeneration, and secondary pollution; it also limits the large-scale application of oil-water mixed absorption liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Soybean oil absorption solution: 10 parts by mass of soybean oil are added to the mixer, followed by adding 80 parts by mass of No. 5 white oil, 8.7 parts by mass of calcium chloride, 0.5 parts by mass of flash point enhancer, and 0.2 parts by mass of active White clay and 0.6 parts by mass of ethylene glycol siloxane were stirred for 1 hour.

[0028] Absorption method: Pass air containing 1000ppm VOC into the prepared VOC absorption liquid, keep stirring, and ultrasonically vibrate. After testing, under this condition, the adsorption rate of the absorption liquid to VOC reaches 95.3%, and the gas at the gas outlet meets the national standard.

[0029] Separation and recovery of absorption liquid: After 24 hours of use, VOC desorption is carried out on the soybean oil absorption liquid. After 24 hours of use, the soybean oil absorption liquid is heated to 80°C, and the VOC is desorbed by decompression condensation. The soybean oil absorption liquid after desorption was...

Embodiment 2

[0031] Soybean oil absorption solution: 30 parts by mass of soybean oil are added to the mixer, followed by adding 65 parts by mass of No. 7 white oil, 4 parts by mass of calcium chloride, 0.05 parts by mass of flash point enhancer, 0.5 parts by mass of active clay and 0.45 parts by mass of polydimethylsiloxane, stirred for 1 hour.

[0032] Absorption method: with embodiment 1. After testing, under this condition, the adsorption rate of the absorption liquid to VOC reaches 95.5%, and the gas at the gas outlet meets the national standard.

[0033] Separation and recovery of absorption liquid: same as embodiment 1. The soybean oil absorption liquid after desorption was used again, and after 20 times of use, its adsorption rate for VOC still reached 94.3%.

Embodiment 3

[0035] Soybean oil absorption solution: 50 parts by mass of soybean oil are added to the mixer, followed by adding 40 parts by mass of No. 3 white oil, 9 parts by mass of calcium chloride, 0.15 parts by mass of flash point enhancer, and 0.55 parts by mass of active clay and 0.3 parts by mass of polyoxypropylene oxide glyceryl ether were stirred for 1 hour.

[0036] Absorption method: with embodiment 1. After testing, the adsorption rate of the absorption liquid to VOC under this condition reaches 92.2%, and the gas at the gas outlet meets the national standard.

[0037] Separation and recovery of absorption liquid: same as embodiment 1. The soybean oil absorption liquid after desorption was used again, and after 20 times of use, its adsorption rate for VOC still reached 91.3%.

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Abstract

Belonging to the technical field of VOC waste gas treatment, the invention particularly relates to a soybean oil absorption liquid for VOC waste gas treatment, an absorption method and a separation and recovery method. The soybean oil absorption liquid comprises, by mass, 10-50% of soybean oil, 40-80% of white oil and 4-10% of calcium chloride. The absorption method includes: introducing air containing VOC waste gas into the soybean oil absorption liquid, conducting stirring continuously, and then carrying out ultrasonic oscillation. According to the separation and recovery method, the soybeanoil absorption liquid absorbing VOC waste gas for 24h or more is subjected to reduced pressure condensation. The soybean oil absorption liquid provided by the invention has the characteristics of lowviscosity, good absorption effect, strong practicability, low cost, easy separation and recovery, recyclability, noninflammability, simple operation and safe use, and is suitable for large-scale application to VOC waste gas treatment.

Description

technical field [0001] The invention belongs to the technical field of VOC waste gas treatment, and in particular relates to a soybean oil absorption liquid, an absorption method and a separation and recovery method for VOC waste gas treatment. Background technique [0002] VOC exhaust gas mainly refers to the kind of volatile organic compounds that will cause harm in the exhaust gas. Most of them are toxic and seriously endanger human health. It includes benzene series, organic chlorides, Freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds, etc. At present, the treatment methods of VOC in exhaust gas are mainly divided into chemical destruction and physical adsorption (absorption). [0003] Chemical destruction methods such as combustion, catalytic oxidation, and biological methods can oxidize VOC into carbon dioxide and water to achieve the purpose of purifying exhaust gas. However, in the actual treatment process, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/26
CPCB01D53/1425B01D53/1487B01D53/1493B01D53/263B01D2252/504B01D2252/60B01D2257/708B01D2257/80Y02A50/20
Inventor 张朝峰张永锋杨汉忠高崔荣谢海涛杨杭生肖吉游遨岳秀林子杰
Owner 义乌韦陀环保科技有限公司
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