A biomass pyrolysis gasification method and biomass pyrolysis system
A technology for pyrolysis gasification and biomass, which is applied in chemical instruments and methods, biofuels, catalysts for physical/chemical processes, etc. It can solve the problem of difficult recovery and recycling of catalysts, low process economy, increased energy consumption and gas consumption, etc. problems, to achieve the effect of shortening the pyrolysis treatment time, increasing the number of layouts, and improving the quality
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[0044] The preparation of the catalyst used in the embodiment
[0045] According to the molar ratio of aluminum nitrate, zirconium oxychloride and lanthanum nitrate 1:0.1:0.01, weigh 1mol of aluminum nitrate, 0.1mol of zirconium oxychloride and 0.01mol of lanthanum nitrate to make 2L solution, mix the solution with 0.5kg silicon carbide The powders were mixed evenly, and then an equal volume of urea solution (4.4 mol) was mixed and stirred by dropping, while keeping the constant temperature of the reaction system at 90°C. During this process, a precipitate was gradually formed. After the reaction was complete, the precipitate was separated by centrifugation, and the precipitate was filtered and washed with deionized water to neutrality. The precipitate was dried at 90°C for 6h, and then burned at 950°C for 20h. After natural cooling, extrude and granulate, the maximum particle size is 1mm, and dry for later use. The resulting catalyst is defined as Al 1.0 Zr 0.1 La 0.01 o ...
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[0047] The dried biomass raw material enters the feeding screw 3 through the primary star valve 2, and is mixed with the microwave catalyst Al falling from the return pipe 16. 1.0 Zr 0.1 La 0.01 o 1.85 / SiC are mixed and preheated in the feeding screw 3 according to the ratio of 1:1. When the material system reaches 260°C, it enters the pyrolysis reaction chamber 5 through the secondary star valve 4, and falls to the rotating disc under the action of gravity. 8 Carry out pyrolysis and gasification reaction, the treatment temperature is 800°C, and the power density is 20×10 5 W / m 3 , the reaction time is 0.5 minutes, and the feed rate is 10kg / h. After catalytic cracking, the raw material is converted into most of the pyrolysis volatile products and a small amount of semi-coke, of which pyrolysis volatiles account for 90%, semi-coke accounts for 10%, and pyrolysis volatiles include about 10% condensable components. The generated pyrolysis volatiles are released from the pyr...
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