Integration of pyrolysis and gasification of low rank pulverized coal

In order to achieve the objectives of research and development of clean and efficient lowrank coal pyrolysis technology,overcoming the key technologies such as pulverized coal pyrolysis and development of pyrolysis-gasification integration technology pointed out in13 th Five-Year Plan for Coal Deep Processing Industry Demonstration.By expounding the principle for coal pyrolysis and gasification reaction,and the current reality of widespread pyrolysis and gasification separate generation,the integrated technical route was put forward to take quality-divided products,materials reciprocation,heat cycle,modular combination and tower structure as the concept,conceives a lowrank pulverized coal pyrolysis-gasification integration device with double tower structure.Theoretical basis,technological process,component structure and main and auxiliary tower combination scheme of the conception were introduced.The conception device can produce pyrolysis water vapor,low temperature pyrolysis gas,gasification gas,semi-coke and other products on the divided-quality basis from lowrank pulverized coal,and provide conditions for coal cascade extension processing.