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A comprehensive treatment method and treatment device for benzyl alcohol production waste gas

A technology for comprehensive treatment and treatment devices, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation to achieve the effect of avoiding secondary pollution

Active Publication Date: 2021-04-30
HUBEI GREENHOME MATERIALS TECH INC
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a comprehensive treatment method and treatment device for benzyl alcohol production waste gas, so as to solve the waste gas problem in the benzyl alcohol production process and realize technical problems such as zero discharge in the true sense

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  • A comprehensive treatment method and treatment device for benzyl alcohol production waste gas

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Embodiment Construction

[0023] figure 1 It is a structural schematic diagram of the device of the present invention. It can be seen from the figure that the device for comprehensive treatment of waste gas from benzyl alcohol production includes waste gas buffer tank 1, room temperature spray tower 2, freezing spray tower 3, heat exchanger, refrigerator, brine tank, activated carbon absorption tower 5, and liquid alkali absorption tower 6 , wherein the normal temperature spray tower 2, the refrigerated spray tower 3 and the liquid caustic soda absorption tower 6 are filled with regular corrugated ceramic packing 7.

[0024] The exhaust gas buffer tank 1 is connected to the bottom of the normal temperature spray tower 2, the top outlet of the normal temperature spray tower 2 is connected to the bottom of the refrigerated spray tower 3, the top outlet of the refrigerated spray tower 3 is connected to the bottom of the activated carbon absorption tower 5, and the top outlet of the activated carbon absorp...

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Abstract

A method for comprehensive treatment of waste gas from benzyl alcohol production, characterized in that the method comprises the following steps: A: the waste gas produced in the hydrolysis process of benzyl chloride is collected and then absorbed by normal temperature spraying; the waste gas absorbed by normal temperature spraying is The exhaust gas then enters the absorption process of the frozen spray activated carbon particles; the exhaust gas absorbed from the frozen spray enters the activated carbon tower absorption process; D: the exhaust gas absorbed from the activated carbon is then absorbed by the sodium hydroxide liquid with a volume concentration of 48%, all The exhaust gas is completely absorbed, and the generated sodium carbonate is recycled to the hydrolysis reaction of benzyl chloride.

Description

technical field [0001] The invention relates to the field of waste gas treatment in industrial production, in particular to a comprehensive treatment method and a treatment device for benzyl alcohol production waste gas. Background technique [0002] Benzyl alcohol (also known as benzyl alcohol, hydroxytoluene) is a very useful chemical intermediate, widely used in industries such as curing agent, thinner, fragrance and flavor. At present, benzyl chloride is mostly produced by reacting benzyl chloride with soda ash at home and abroad. The reaction will produce a large amount of waste gas, mainly carbon dioxide generated during the hydrolysis process, and a small amount of volatilized benzyl chloride and benzyl alcohol. Due to the strong irritation of benzyl chloride gas , The direct discharge of exhaust gas will not only pollute the atmosphere, but also cause great harm to the human body. At present, the treatment facilities of many manufacturers are difficult to completely...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/18B01D53/04B01D53/78B01D53/62
Inventor 危先龙杨华肖华青熊鲲杜斌
Owner HUBEI GREENHOME MATERIALS TECH INC
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