WAYS TO IMPROVE THE EFFICIENCY OF THE PROCESS GAS PURIFICATION FROM ACIDIC IMPURITIES

摘要

The most common method of gas purification from acidic impurities is cleaning with amines-natural organic compounds that are derivative of ammonia. Amine purification is a regenerative process. Absorption of acidic pollutants occurs approximately ambient temperature Wednesday, and Amina regeneration occurs at boiling point in stripping column. The disadvantage of the process natural and technological gases from acidic impurities is the large amount of heat required to desorption. The most common and effective method for purification of gas currently cleaning using alkanolaminov. This process differs with the opportunity to achieve a high degree of purification at relatively low cost. Gas purification schemes to reduce heat flow supplied to the bottom of the stripping column, were simulated in the package Unisim Design: standard process flows, Division steam, their combination of recompression. Also offers purification scheme when using a mixture of amines (DEA + MDEA). Method of combining schemes and Division of flow helps reduce the heat load compared with the method of replacing monoethanolamine on 23%, but the method of steam recompression has a lower heat load compared with replacement of monoethanolamine-on 30%.Other options for change process flow diagrams are associated with large capital costs. Thus, the proposed scheme with steam recompression will reduce the heat load with relatively small capital cost.