Low temperature boiler fired with agriculture biomass

Abstract

The article is a summary attempt of the research work carried out by the Institute of Power Engineering (IEn) as part of the BioCHP project. The purpose of the project was to develop and prepare for the implementation of a CHP installation producing electricity and heat from waste micronized biomass burned in a pressure combustion chamber and supplying the gas turbine directly IEn, as a partner of this project, was tasked with developing a boiler technology that can be powered both by a large stream of low-temperature exhaust gases from the turbine and by a small stream of high-temperature exhaust gases resulting from the combustion of biomass in the furnace chamber of that boiler. As a result, a hybrid boiler was designed and built with a pre-combustor equipped with a low temperature combustion chamber eliminating the risk of boiler slagging when burning biomass with a low ash melting point. The article describes the methods that accompanied the boiler design process from the construction of the biomass burner model to the technical design of the biomass burner, low-temperature furnace chamber and the entire boiler with a heat output of 10 MW. Much attention has been paid to how the combustion process is organized in the pre-combustor chamber and the methods of obtaining a stable ignition of the dust-air mixture. Both the starting oil burner and plasma igniters were tested at work. The final result of the work is a working demonstration plant located on the premises of the heating plant in Karczew, where the boiler tests were carried out, which confirmed that it ensures stable heat production from micronized biomass and meets the current emission standards.