Preliminary Study Of Organic Solid Waste Plasma Pyrolysis In Spout-Fluidized Bed

There are many kinds and huge amount of organic solid wastes in our country,however the quantity and varieties organic of solid wastes recycled in our country islimited. Currently, large fraction of organic solid wastes is disposed of landfill, whichwould lead large area being covered, water and soil pollution, resources wasted andaffect environment landscape. Organic waste plasma Spout-Fluidized bed pyrolysiscan make the waste reduction, recycling and none harmless, which is the developmenttendency of organic solid waste treatment technology. At present, the development ofthe plasma pyrolysis technology is still in the initial phase, it is needed some controlon plasma generator power and pyrolysis reactor structure optimization to improve theenergy utilization radio in the use of energy of the plasma.This project associates plasma pyrolysis technology and Spout-Fluidized bedequipment, and conducts the experiment under normal temperature and hottemperature respectively. Besides make the comparative analysis through changingthe device operating conditions, the article compares the plasma spout-fluidizedbed pyrolysis with tube type furnace pyrolysis and related literature of plasmapyrolysis, which for the preliminary study of organic waste plasma pyrolysistechnology and Spout-Fluidized bed devise.This article comes up with a correlate equation of minimum spouted velocity ofthe devise in normal temperature. And that, in the same bed height and auxiliary gasflow rate, the spouted with center auxiliary gas has littler minimum auxiliary gas thanspouted with horizontal auxiliary gas. In order to improve the energy efficiency of theplasma, quartz sand joined in reactor in hot temperature experiment, After measuring,quartz sand in the device can be heated to900℃, which fully met the materialpyrolysis temperature. In addition, the project calculated the particle circulation rate,particle heating rate and particles heat transfer in the reaction.The gas production calorific values and gas conversion of rise husk plasmapyrolysis with horizontal auxiliary gas respectively are20.6MJ/Nm3and76.7%,which is much more than14.71MJ/Nm3and44.1%of plasma pyrolysis with nohorizontal auxiliary gas, horizontal auxiliary gas can promote the fluidization andcirculation of the material in the reactor, reduce dead zone of the cycle in vertebralparts reactor and greatly improve heat transfer effect. When the horizontal auxiliary iswater vapor, the gas conversion of the reaction is account for82%, which is higher than the numerical value of the reaction with none water vapor. Through theexperiment, the gas conversion and gas production calorific values of the rice huskplasma pyrolysis in Spout-Fluidized bed is several times as many as that of rice husktubular furnace pyrolysis, and there is no tar product in plasma Spout-Fluidized bedpyrolysis. At last, the article make energy balance calculation of the experimental, theenergy utilization ratio of rice husk plasma gasification is account for46%, which ishigher than38%of rice husk plasma pyrolysis.