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Method for treating methionine production technology waste gas

A treatment method and methionine technology, applied in the field of waste gas treatment, can solve the problems of low efficiency and high cost of methionine waste gas treatment technology, and achieve the effects of small investment, low treatment cost and low cost

Inactive Publication Date: 2016-07-20
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for treating methionine waste gas with high efficiency and low cost in view of the problems of low efficiency and high cost of the current methionine waste gas treatment technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The waste gas from the methionine production process was treated according to the above method.

[0025] The concentration of methionine in the waste gas of methionine production process is about 45mg / m 3 , the wind volume is 100m 3 / h, the exhaust gas first passes through the pretreatment scrubber, the absorbent is water, and the spray density is 4m 3 / m 2 .h, the treated exhaust gas enters the molecular cracking system with a power of 3kw and a frequency of 500Hz. After the exhaust gas is degraded by the cracking reaction, it enters the exhaust gas absorption tower for advanced treatment. The absorbent is 5%wt NaOH aqueous solution, and the spray density is 8m 3 / m 2 .h, continue the above process, the effect of the device running for 1 hour is stable, and the removal rate of methionine reaches 96.1%.

Embodiment 2

[0027] The waste gas from the methionine production process was treated according to the above method. The main devices used in this embodiment include: a pretreatment absorption tower, a molecular cracking device, and a tail gas absorption tower.

[0028] The concentration of methionine in the waste gas of methionine production process is about 32mg / m 3 , the wind volume is 100m 3 / h, the exhaust gas first passes through the pretreatment scrubber, the absorbent is ethylene glycol, and the spray density is 8m 3 / m 2 .h, the treated exhaust gas enters the molecular cracking system with a power of 5kw and a frequency of 800Hz. After the exhaust gas is degraded by the cracking reaction, it enters the exhaust gas absorption tower for advanced treatment. The absorbent is 5%wt NaOH aqueous solution, and the spray density is 5m 3 / m 2 .h, continue the above process, the effect of the device running for 1 hour is stable, and the removal rate of methionine reaches 97.7%.

Embodiment 3

[0030] The waste gas from the methionine production process was treated according to the above method. The main devices used in this embodiment include: a pretreatment absorption tower, a molecular cracking device, and a tail gas absorption tower.

[0031] The concentration of methionine in the waste gas of methionine production process is about 49mg / m 3 , the wind volume is 100m 3 / h, the exhaust gas first passes through the pretreatment scrubber, the absorbent is water, and the spray density is 10m 3 / m 2 .h, the treated exhaust gas enters the molecular cracking system with a power of 10kw and a frequency of 1000Hz. After the exhaust gas is degraded by the cracking reaction, it enters the exhaust gas absorption tower for advanced treatment. The absorbent is 5%wt NaOH aqueous solution, and the spray density is 6m 3 / m 2 .h, continue the above process, the effect of the device operation is stable for 1 hour, and the removal rate of methionine reaches 98.9%.

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Abstract

The invention belongs to the field of waste gas treatment and relates to a method for treating methionine production technology waste gas. The method includes enabling the methionine production technology waste gas to pass through a pretreatment absorption tower, a molecular decomposition system and a tail gas absorption tower sequentially, wherein the molecular decomposition system comprises an energy release system and a reactor system, and the energy release system generates a high-energy field in a reactor to enable chemical bonds of contaminants to break and degrade. The method for treating the methionine production technology waste gas has the advantages of simplicity in operation, low treatment cost, low device investment and the like.

Description

technical field [0001] The invention belongs to the field of waste gas treatment and relates to a treatment method for waste gas containing methionine. Background technique [0002] Methionine is widely used in the fields of medicine, food, feed and cosmetics, among which the amount of feed additive is the largest. DL-methionine is one of the basic units of protein, and it is the only amino acid containing sulfur among the essential amino acids. In addition to participating in the transfer of methyl groups in animals, the metabolism of phosphorus and the synthesis of adrenaline, choline and creatine, it is also a synthetic Raw material of protein and cystine. [0003] However, the exhaust gas produced by the methionine production line has a strong stench, which will have a great impact on the production employees and the surrounding residents. If it is not handled properly, it will also receive repeated complaints from the surrounding residents. [0004] At present, the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/14
CPCB01D53/1406B01D53/323B01D2252/2023B01D2252/103
Inventor 徐炎华于鹏李溪
Owner NANJING UNIV OF TECH
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