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A method for purifying tail gas from fermented feed production

A fermented feed and tail gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of large tail gas emissions and unsafe discharge, and achieve no secondary pollution, high efficiency and environmental protection, secondary pollution, low cost effect

Active Publication Date: 2021-10-26
SHANDONG LUHUA GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This simple treatment method is difficult to completely treat the odorous substances in the tail gas of fermented feed, and the exhaust gas emission during the drying process is very large, and only one alkali washing and one spraying cannot meet the requirements of safe discharge

Method used

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  • A method for purifying tail gas from fermented feed production
  • A method for purifying tail gas from fermented feed production
  • A method for purifying tail gas from fermented feed production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for purifying tail gas produced by fermenting peanut meal, the steps are as follows:

[0036] (1) Dust removal by bag filter: During the drying process of fermented feed, the tail gas dried by the boiling dryer is subjected to primary dust removal through the bag filter under the action of the exhaust fan;

[0037] (2) Alkali absorption: The tail gas treated in step (1) is passed into the lye spray room, the top of the lye spray room is equipped with an atomizing nozzle, the lower layer is the lye circulation pool, and the lye circulation pool passes through the lye Add the pump to connect to the lye storage tank; the tail gas enters from the side of the lye spray room, and is sprayed and absorbed by the densely arranged atomizing nozzles on the top to remove irritating acid gases such as hydrogen sulfide and organic acids, and perform secondary dust removal at the same time;

[0038] Wherein, the lye pH value in the control lye circulation pool is 9.5, and the...

Embodiment 2

[0068] The purification method of fermented sesame meal production tail gas, the steps are as follows:

[0069] (1) Dust removal by bag filter: During the drying process of fermented feed, the exhaust gas dried by the boiling dryer will pass through the bag filter for primary dust removal under the action of the exhaust fan;

[0070] (2) lye absorption: the tail gas treated in step (1) is passed into the lye spray chamber, the top of the lye spray chamber is equipped with atomizing nozzles, and the lower layer is the lye circulation tank, and the lye circulation tank passes through the lye liquid The addition pump is connected to the lye storage tank; the exhaust gas enters from the side of the lye spray chamber, and is sprayed and absorbed by the densely arranged atomizing nozzles on the top to remove irritating acid gases such as hydrogen sulfide and organic acid, and conduct secondary dust removal at the same time;

[0071] Among them, the pH value of the alkali liquor in t...

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Abstract

The invention belongs to the technical field of tail gas treatment, in particular to a method for purifying tail gas from fermented feed production. The present invention adopts a four-step continuous treatment method, that is, dust, volatile organic acids, hydrogen sulfide gas, alcohol, ester and other odorous gases are respectively purified by bag dust removal, lye absorption, high-pressure spray adsorption, and biological liquid spray. The process of the invention has high tail gas odor removal rate, low cost, high efficiency, environmental protection and no secondary pollution, and is suitable for large-scale popularization and application in the fermented feed industry.

Description

technical field [0001] The invention belongs to the technical field of tail gas treatment, in particular to a method for purifying tail gas from fermented feed production. Background technique [0002] During the feed fermentation process, a large amount of organic acids such as acetic acid and lactic acid, as well as volatile odor gases such as hydrogen sulfide, mercaptan and ammonia will be produced. Especially during the drying process of fermented feed, a large amount of volatile substances are emitted along with water vapor and dust. If not handled properly, it will cause certain pollution to the environment and seriously affect the environment of surrounding residents. With the gradual enhancement of people's awareness of environmental protection, the standards and supervision of industrial exhaust emissions have become more stringent. Direct discharge of fermented feed production tail gas without treatment will be prohibited and punished by relevant regulatory author...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D50/00B01D53/75B01D53/79B01D53/40B01D53/96B01D53/84B01D53/44B01D53/14
CPCB01D53/75B01D53/79B01D53/40B01D53/96B01D53/84B01D53/44B01D53/1493B01D53/1487B01D2251/95B01D2251/304B01D2251/306B01D2251/404B01D2251/602B01D2251/604B01D2251/606B01D2252/2053B01D2257/304B01D2257/708B01D2258/02B01D50/60Y02A50/20
Inventor 辛旭峰杜祖波徐会茹李卫青李秋王珊珊
Owner SHANDONG LUHUA GROUP
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