Coking deodorization treatment is a difficult problem in the industry. In the process of pressure relief after pressure test, water cooling coke, cyclic overflow and hydraulic decoking, some coking tail gas will be released, forming coking odor and affecting the operating environment.The following is a brief introduction of several common deodorant coking process.

1. absorption method: coking deodorization absorption is the use of gas in the liquid solubility of different to separate and purify the gas mixture of an operation process.It is an important unit in chemical production. It is a quality transfer process between two phases.Coking deodorization absorption method is also often used in the treatment of gaseous pollutants, such as hydrogen sulfide, ammonia and other pollutants of industrial waste gas can be treated by absorption method.

2. adsorption method: coke deodorization adsorption is a complex surface phenomenon.It is the use of porous solid adsorbent to deal with the gaseous (or liquid) mixture, so that a component of the coking deodorization on the solid surface of the unbalanced molecular gravity or chemical bond force is adsorbed on the solid surface, so as to achieve the purpose of separation.At present, adsorption operation has been widely used in the purification of toxic and harmful gases and has become one of the important methods to deal with gaseous pollutants.

It should be noted that coking deodorization adsorption and absorption are different, absorption of molecules in the liquid phase is basically uniform dispersion, and adsorption on the solid surface of the molecule "concentrated" formed the adsorption layer, so from the molecular point of view, it is not uniform process.The principle of gas adsorption is similar to that of liquid adsorption, and it is mainly suitable for the removal of low concentration gaseous pollutants in the mixture in the waste gas treatment.The commonly used gaseous adsorbents are molecular sieve, activated carbon, coke and so on.

3. combustion method: coking deodorization using the combustion process of combustible gas in the exhaust gas, organic steam, fine dust particles into a harmless or easy to remove method.It is characterized by the treatment of low pollutant concentration of waste gas, high purification degree, but also smoke elimination, deodorization.The process is simple and easy to operate.Combustion methods can be divided into three categories: direct combustion, incineration and catalytic combustion.Coking deodorization combustion method must ensure that the combustion is complete, otherwise the formation of combustion products may be more harmful.Therefore, there is sufficient oxygen, sufficient temperature and appropriate residence time, and a high degree of turbulence to ensure the mixing of high temperature gas and exhaust gas.

4. Low temperature plasma degradation method: coking deodorization low temperature plasma degradation of pollutants is the use of these high-energy electrons, free radicals and other active particles and pollutants in the exhaust gas, so that the pollutant molecules decompose in a very short time, and the occurrence of various subsequent reactions to achieve the purpose of coking deodorization.