Study Of Oriented Gasification Of Biomass And Remaining Waste

Biomass and municipal solid waste (MSW) are two kinds of enormous output and energy-rich solid waste. Annual MSW output in China is about 160 million tons and the rate of resource utilization is below 20%. Annual biomass straw output is about 700 million tons, only 33% of which is used effectively. Meanwhile, energy utilization for these two types of waste has significant social and economic benefits. In this paper, biomass and high-heating-value waste after source separation were made into refuse derived fuel (RDF) together, then oriented gasification process to get high-quality syngas was investigated.Through the sampling and analysis of MSW at seven landfill sites in Liaoning province, component and composition of MSW were obtained. The results show that high calorific waste content is about 20% in total and the heat value of dried sample is over 12MJ/kg, adapting to gasification. By means of thermogravity analyser (TG-DTA), the gasification of biomass mixed separately with paper, plastic (PE) and textile were experimented to obtain the effect of mixture ratio on the way of gasification process and the mixtures gasification kinetic models were built up. The experiments show that higher the C and H content, the more CO and H2 obtaining.The gasification of RDFs with different mixture ratio in the fluidized bed reactor was studied. The results show that the change of steam flow and air flow can affect the H2 and CO content. By adjusting the mixture ratio of two materials, the H2/CO ratio in gas product can reach to 1. During the experiment conditions, the H2/CO ratio equals to 1.077, the most closely to 1 at the RMW and straw mass ratio of 2.The gray correlation degree analysis of biomass and RMW mixture gasification was carried out, and the calculation of comprehensive correlation degree gives the result that mixture ratio is a factor affecting the H2/CO value at large except steam flow, which will cost more.