Investigation On The Using CaO To Recuperate The Combustion Mechanism And Emission Characteristics Of Acid-hydrolytic Biomass Residue

Energy is the basis of economic and social development. Energy crisis is more andmore serious and the world is becoming more and more important to environmentalprotection, So researching and development the renewable energy to replace theoveruse non-renewable resources is becoming a main research by government andscholars. Because of the large pollution of direct combustion, so liquid fuel is one ofthe most widely use of biomass energy technology after hydrolysis preParation ofbiomass. But if the biomass hydrolysis residue remaining will not be able to timelytreatment and the correct use, it will cause the environment pollution and resourcewaste. Investigation on the using CaO to recuperate the combustion mechanism andemission characteristics of acid-hydrolytic biomass residue is very necessary.Based on the acid hydrolysis of biomass residue, furfural residue as the researchobject, Investigation on the using CaO to recuperate the combustion mechanism andemission characteristics of acid-hydrolytic biomass residue Put forward to use theCaO to regulate acidic environment and use of CaO as desulfurizer new train ofthought. Built a miniature combustion simulation test bench, and use it to investigatethe combustion and emission characteristics of the biomass boiler.The study find that with the increase of the amount of CaO, the end of initialtemperature, pyrolysis temperature is increased, calcium oxide block pyrolysis,pyrolysis lag. The CaO can the maximum reaction rate, lag the combustion ignitiontemperature and inhibit the precipitation of volatile. The addition of CaO inhibits thepyrolysis combustion reaction, and that adding amount is larger, the more seriousinhibition. Pyrolysis and combustion process along with the increase of moldingpressure, lag the temperature of the beginning of pyrolysis, ignition, the maximumreaction rate point. The bigger forming pressure, the more obvious deflagration. As the higher the temperature of the combustion reaction, then the mass fraction of sulfurin flue gas is higher. So the lower combustion temperature can reduce the massfraction of sulfur in the flue gas and the sulfur residue in the residue. When thethickness of the fuel layer is400mm and the primary and secondary air flowdistribution ratio is50%, the biomass PartiCles burn fully and the thermal efficiencyis the highest. In good primary and secondary air flow rate, the reason of theincreasing exhaust heat loss is that the exhaust temperature is too high. So in thefuture the design and development of biomass pellet boiler, we should reduce exhaustsmoke heat loss, namely lower excess air coefficient and reduce the air leakage, etc.