The optimization of the gasifier recovery zone height when working on straw pellets.

Abstract

Analysis of studies of the process of generator gas obtaining from straw allows us to draw a conclusion about the suitability of using straw as a fuel for a gasifier. However, the main obstacle to producing generator gas from straw is the formation of solid agglomerates in the process of producing generator gas. In order to avoid the formation of agglomerates, the researchers went through the creation of complex designs of gasifiers. In addition, it was not possible to completely avoid the formation of agglomerates on the working surfaces of gasifiers, in particular on grates. The article discusses the design of the gasifier, which does not have a grate, and gas is extracted through grooves in the side surface of the recovery zone. The article also presents the results of experimental studies of such a gasifier operation. The influence of the air supply to the gasifier and the height of the recovery zone on the concentration of carbon monoxide in the generator gas was established. It was determined that when the air supply is 3.8 l/s, the optimal height of the recovery zone, at which the maximum output of CO is reached, is 100±2 mm. When the air supply is 8.3 l/s, the optimal height of the recovery zone is 90±2 mm, and when the supply is of 12.8 l/s – 70±2 mm. Experimental studies of the operation of the power plant using generator gas obtained from straw were also carried out.