Hydrolysis method of COS in synthesis gas based on high-density circulating fluidization and gasification process

Abstract

The invention provides a hydrolysis method of COS in a synthesis gas based on a high-density circulating fluidization and gasification process. In the hydrolysis method, aiming at the characteristics that the synthesis gas produced by an IGCC (integrated gasification combined cycle) power plant by adopting a whole coal gasification technology of a transportation bed reactor contains 17.0% by volume of H2O, 0.478% by volume of NH3 and 80-120ppm by volume of COS, a DJ-1A multifunctional purifying agent which is produced and developed by Hua Shuo science and technology Co., LTD is adopted, 80-120ppm by volume of COS in the synthesis gas is converted to H2S under the conditions that the temperature is 170-220 DEG C, the pressure is 2.7-3.3MPa and the space velocity is 1000-3000n<-1>, and the volume content of COS at the outlet is less than 10ppm, so as to meet the process requirement. The hydrolysis method of COS has the characteristics that CO+H2O=H2+CO2 shift side reaction is small under the condition of 17.0% by volume of H2O and simultaneously, the influences of impurities in the synthesis gas, such as NH3 and the like, are overcome.

Description

Technical field: [0001] The present invention relates to the technical field of coal gasification and integrated gasification combined cycle (IGCC), in particular to a method for hydrolysis of COS in typical synthesis gas generated based on a high-density circulating fluidized coal gasification process. Background technique: [0002] At present, my country's coal-based energy structure is facing increasing international pressure on environmental protection issues, and there is an urgent need for breakthroughs and innovations in clean coal technology. [0003] my country's clean coal utilization technology is in a rapid development stage, and the integrated gasification combined cycle (IGCC) is generally considered to be one of the most efficient and clean ways to convert coal into electricity. [0004] In the IGCC process, coal is first converted into synthesis gas through a gasifier under certain temperature and pressure conditions. After purification, the generated synthesis gas en...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a method for the hydrolysis of COS, a component of syngas based on high-density circulating fluidized gasification process, for existing catalysts that cannot meet the requirements of COS hydrolysis in high water content and high ammonia content syngas. The volume content of 17.0% H 2 O, 0.478% NH 3 80-120ppm of COS in the synthesis gas is converted into H 2 S, the outlet COS content is less than 10ppm, and at the same time less than 0.5% of the CO in the syngas produces CO+H 2 O==H 2 +CO 2 Conversion side reaction, 0.478% NH 3 No effect on the activity of DJ-1A multifunctional purifier