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Purifying device and method decarbonizing nitric acid industry tail gas to extract N2O

A technology of industrial tail gas and purification equipment, applied in chemical instruments and methods, separation methods, nitrous oxide, etc., can solve problems such as bad smell, secondary pollution, combustion and explosion accidents, achieve high production capacity, and ensure safe use Product, the effect of eliminating ammonia odor

Pending Publication Date: 2017-05-31
杨刘月
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the waste liquid produced by alkaline washing has caused secondary pollution to the environment
Especially the by-products of nitric acid tail gas decarbonized by ammonia water, if the ammonia component remains, not only the smell is bad, but when it is used in the medical field, it may cause combustion and explosion accidents due to the need to add oxygen

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  • Purifying device and method decarbonizing nitric acid industry tail gas to extract N2O

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implement...

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Abstract

The invention relates to the technical field of chemical substance recycling and provides a purifying device and method decarbonizing nitric acid industry tail gas to extract N2O. The decarbonizing purifying device comprises a dryer provided with water-removing absorbent and pressure swing adsorption equipment provided with decarbonizing absorbent. The method includes: using a washing tower to wash raw material gas, using a buffer tank to remove free moisture in the raw material gas, using first compression cooling device to pressurize the raw material gas, using the dryer to dehydrate the raw material gas, and using the pressure swing absorption equipment to remove non-polar gas in the raw material gas. The method has the advantages that the physical immunity removing and high-pressure throttling refrigeration rectification process is used; compared with a method chemically decarbonizing other tail gas to recycle N2O, the method can avoid waste alkaline liquid secondary pollution and is low in cost and convenient and safe to operate.

Description

technical field [0001] The invention relates to the technical field of chemical substance recovery, in particular, to a method for extracting carbon from nitric acid industrial tail gas and extracting N 2 O purification device and process method. Background technique [0002] Nitrous oxide, also known as nitrous oxide, commonly known as "laughing gas", molecular formula N 2 O. N 2 O is a high-pressure liquefied gas with a boiling point of -88.49°C and a melting point of -90.7°C. It is colorless and has a sweet taste. It is a gaseous oxidant. It is very stable at room temperature and can be decomposed into oxygen and nitrogen at temperatures above 600°C. [0003] N 2 O has a wide range of applications. For example, it can be used as a combustion aid to provide power for rockets, and it can be used in military and aerospace fields; it can be used in the manufacturing processes of integrated circuits, chips, and photovoltaics in the electronics industry; Surgery, gynecolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/02B01D53/047B01D53/26C01B21/22
CPCB01D53/02B01D53/047B01D53/14B01D53/1475B01D53/261C01B21/22B01D2258/02Y02C20/10
Inventor 杨刘月王雪婵王云飞
Owner 杨刘月
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