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Environmental-protection process for purifying tail gas in production of amino acid

An amino acid and tail gas technology, applied in chemical instruments and methods, combined devices, applications, etc., can solve the problems of difficult reuse or reprocessing, low utilization value of calcium sulfate, and high maintenance costs, achieve optimal desulfurization and denitrification effect, improve The effect of industrial added value and reduction of industrial energy consumption

Active Publication Date: 2015-06-24
齐齐哈尔龙江阜丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wet flue gas desulfurization method has desulfurization and the use value of calcium sulfate is not high, resulting in difficulties in reuse or reprocessing, complex processes, and high maintenance costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An environmentally friendly process for purifying amino acid production tail gas, the process comprises the following steps:

[0022] 1) Dust removal and demisting: the tail gas is first sprayed to cool down and remove dust, so that the temperature of the tail gas is lowered to below 35°C, and then demisted by an electric demister;

[0023] 2) Desulfurization and destocking: Lay the chemical preparation on the lower part of the inner wall of the pipeline with a thickness of 10cm, contact the demisted tail gas with the chemical preparation for 15 minutes, then enter the microbial reaction chamber, and spray the compound bacterial agent, the spraying amount is 100mL / N M 3 , the reaction time is 24h, and finally the tail gas passes through the microfiltration membrane to remove residual microorganisms and discharge gas; the microbial preparation can be reused; the microfiltration membrane is a ceramic microfiltration membrane with a molecular weight cut-off of 5000Da;

...

Embodiment 2

[0031] An environmentally friendly process for purifying amino acid production tail gas, the process comprises the following steps:

[0032] 1) Dust removal and demisting: the tail gas is first sprayed to cool down and remove dust, so that the temperature of the tail gas is lowered to below 35°C, and then demisted by an electric demister;

[0033] 2) Desulfurization and desulphurization: the tail gas after defogging is in contact with chemical preparations for 20 minutes, then enters the microbial reaction chamber, and sprays compound bacterial agents with a spraying volume of 200mL / NM 3Tail gas, the reaction time is 24h, and finally the tail gas passes through the microfiltration membrane to remove residual microorganisms and discharge gas; the microbial preparation can be reused; the microfiltration membrane is a ceramic microfiltration membrane with a molecular weight cut-off of 5000Da;

[0034] 3) Fertilizer preparation: After using the chemical preparation for half a mont...

Embodiment 3

[0040] Exhaust gas purification effect test: choose the boiler exhaust gas prepared by our company to prepare amino acids, and use the process of Example 1 to treat it. The units of various pollutants are mg / Nm 3 , the specific results are shown in Table 1:

[0041] Table 1

[0042] pollutant type NOx SO 2 soot before processing 511 1209 177 after treatment 17 44 5

[0043] Conclusion: After purification treatment, the concentration of various pollutants is greatly reduced, fully complying with the emission standards.

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Abstract

The invention belongs to the technical field of environmental protection and discloses an environmental-protection process for purifying the tail gas in production of amino acid. The environmental-protection process comprises the steps of removing dust and mist, desulfurizing, denitrating and preparing fertilizers. The environmental-protection process disclosed by the invention has the advantages that the operation is simple and feasible, the investment cost is low, and the treating effect is good; and the fertilizers are utilized and prepared simultaneously, so that the purpose of changing wastes into valuables is realized and two purposes are achieved by one action.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an environmental protection process for purifying tail gas from amino acid production. Background technique [0002] In the process of fermentation and preparation of amino acids, a large amount of tail gas will be produced, which is mainly boiler tail gas. Boiler exhaust gas is mainly a mixture of gas and smoke, which is the main cause of air pollution in residential areas. The composition of the flue gas is very complex. The gas includes water vapor, sulfur dioxide, hydrocarbons, and nitrogen oxides. The smoke includes fuel ash, coal particles, oil droplets, and high-temperature cracking products. Therefore, the pollution of flue gas to the environment is the compound pollution of various poisons. The harmfulness of smoke to the human body is related to the size of the particles. The most harmful to the human body is the floating dust with a dia...

Claims

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Application Information

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IPC IPC(8): B01D50/00B01D53/75C05G1/06
Inventor 王均成宫文哲程文焕宋海波张传森丁兆堂卢松徐彩凤
Owner 齐齐哈尔龙江阜丰生物科技有限公司
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