The Study On Biomass Solidifying Pressure And Mathematical Model

Energy crisis and environmental pollution are common problems faced by the world. The whole world has taken the reproducible energy development as an important task. There are abundant resources of crop residues in our country, such as rice straw and cotton stalks. It was estimated that the amount of crop residues is 6.4×108 t. However, they have not been processed and utilized properly with the development of economy and society in the rural areas. A majority of them is burned on farm which results in serious environmental pollution and biomass resource waste. Therefore, it is important to convert agricultural wastes into solid fuels of high quality by biomass conversion technology for ecological environment and agricultural sustainable development. Bio-energy has been the important energy that the mankind depends on for existence all the time. It is second only to the coal, petroleum, natural gas and occupies the fourth in the energy-consuming general quantity of the world, has the important position in the whole energy system. Biomass solidifying technology has the merits such as easy processing, low cost, good combustibility and high thermal efficiency. The bio-energy would have great prospect in the countries, which are deficient with petroleum and coal.The purpose of this study is to investigate biomass solidifying factors, and groping for solidifying principle. The studies would provide theoretical basis for equipment design and optimization of process parameters and be advantageous to the commercialization of bio-fuels. The main content and conclusions drawn in the dissertation are as follows:1. Compressed the materials of corn straw and peanut hull in different moisture contents and pressures, educed the relation between moisture content and briquette density, analyzed the results and gain the conclusions. The material with moisture content of 15% can be compressed to achieve the biggest density,2. Compressed the materials of peanut hull in different moisture. size and pressure, educed the relation between size and briquette density, analyzed the results and gain the conclusions. The material with size of 0~3cm can be compressed to achieve the biggest density,3. Compressed three different materials in different pressures through solidifying experiment in high pressure and natural conditions , drew out the briquette density versus pressure, elicited quantitative relation; Solved two major difficult problems in the process of bio-fuel solidification. It is the capability of tightness and long time putting.4. Test verification for the fitting of the equation, due to different types of biomass, the complex structure of fitting a specific equation.This research will provide theoretical foundation for the development of biomass solidifying technology with high pressure on natural conditions. This technology will help relieve a series of questions that are brought by the short supply of energy and the environment pollution...