Treatment And Engineering Practice For Odors Of Fatty Amine Production

Fatty amines are a class of important basic chemical raw materials with a wide range of applications and refer to organic amine compounds with carbon chain lengths in the range of C8-C22.In the process of producing aliphatic amines,a large amount of industrial waste gas containing environmental odor will be produced,including monomethylamine,dimethylamine,trimethylamine and low-carbon chain amines,ammonia etc.Not only the large amount of exhaust gas,high concentration,and these organic ammonia and ammonia,the sniffing value is low,is a typical atmospheric odor pollutants.Therefore,the production of aliphatic amine exhaust gas is currently one of the most urgent problems to be solved atmospheric pollution.It is of great practical significance to develop fatty amine exhaust gas treatment technology with high purification efficiency,stable operation effect,safe operation and recoverable resources at the same time,and it has also become a key issue for the engineering research and development.In view of the high concentration of ammonia,dimethylamine and organic amines in the stench gas produced by the acid production of aliphatic amines and alcohol by the company's acid method,from the perspective of resource recovery and utilization and avoiding the risk of hydrogen explosion,the absorption method And resource recovery process.The spray absorption method was used to treat the production of aliphatic amines.The main influencing factors such as ammonia concentration,gas-water ratio,ammonia absorption tower,and absorption liquid temperature on ammonia and dimethylamine separation and recovery were discussed.The experimental results show that: 1)the higher the content of ammonia or dimethylamine in the inlet gas,the higher the equilibrium concentration of the first-order absorption,and the better the reuse.2)The larger the inlet flow rate,the higher the temperature of the absorption liquid,The higher the hydrogen,the negative effect on ammonia or dimethylamine absorption.3)Increase the absorption level,will increase the absorption rate of ammonia.Taking into account the actual production and environmental management requirements,the optimal absorption level of 4,of which 1 to 3 exchange use,analysis of tail gas back to production;the first 4 using acid spray absorption.4)reduce the intake temperature,can significantly improve the recovery of fatty amine in the exhaust and pollutant removal rate.5)Under the optimal experimental conditions,the recovery rate of ammonia or dimethylamine was over 92%.At the same time,the steady discharge of tail gas was achieved.The results obtained can provide a scientific basis for practical production.On the basis of experiments,the feasibility of the Company's fatty amine waste gas treatment project was evaluated from the aspects of environmental benefits and economic benefits by tracking the implementation and operation of the project and combining with the comprehensive utilization of whole factory exhaust gas.The engineering parameters obtained can be Company production management to provide the basis for the successful construction of this project for other similar domestic enterprises to provide air pollution control engineering application example.