A method of heat -solving power generation and comprehensive utilization of rice shells

Abstract

The invention relates to a rice husk pyrolysis electric power generating and comprehensive utilization method, and belongs to the field of biomass energy chemistry. The method comprises following steps: 1, biomass pyrolysis generation of pyrolysis gas and pyrolytic carbon; 2, synchronous oxygen removing, tar reduction, and phenol enrichment; 3, pyrolysis gas heat exchange cooling heat recycling, and separation of phenol containing waste water; 4, electrostatic tar capturing pyrolysis gas purifying, and tar enrichment; 5, pyrolytic carbon is adopted for dispersion of tar, synchronous water gasreaction, and steam reforming production of hydrogen-enriched gas; 6, reaction waste residue is taken as a biomass nanometer silica preparation raw material; and 7, preparation of phenolic resin adhesive from the phenol containing waste water. According to the method, hydrogen in water is adopted to solving problems of using of biomass as an energy that hydrogen content is low and oxygen content is high; pyrolysis and steam reforming two step method is adopted to prepare hydrogen-enriched high-energy combustion gas, electric power generation and heat supply are realized; at the same time, thephenol containing waste water is enriched to produce biomass phenol base adhesive, so that environment pollution caused by chemical phenol is reduced, cost is reduced, waste is changed into valuables;by-product natural nanometer silica is obtained, and an ultra wear resistance material is provided for green aviation tyres.

Description

technical field [0001] The invention belongs to the field of biomass energy chemical industry, and specifically discloses a method for power generation and comprehensive utilization by pyrolysis of rice husk. Background technique [0002] Rice husk pyrolysis power generation has become a preferred project strongly supported by the national and local governments, and has been promoted and applied at home and abroad. Among the many pyrolysis equipment, the most widely used in the market is the downdraft pyrolysis tower. The rice husk is added from the upper part and goes down through the drying zone, pyrolysis zone, and cooling zone. To generate electricity, the pyrolytic charcoal is discharged from the bottom of the pyrolysis tower after cooling down. But there are still following problems: [0003] (1) During the pyrolysis process of rice husk, the cooling area of ​​the pyrolysis tower is immersed in the water pool, the cold water cools down, the temperature of pyrolysis g...

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Problems solved by technology

[0003] (1) During the pyrolysis process of rice husk, the cooling area of ​​the pyrolysis tower is immersed in the water pool, the cold water cools down, the temperature of pyrolysis gas and pyrolysis carbon is reduced from 600°C to 700°C to 300°C to 400°C, and most of the heat is lost. wasted energy

[0004] (2) The pyrolysis gas contains tar. After being washed and purified, it is introduced into a generator for combustion and power generation, resulting in a large amount of wastewater containing phenolic tar, which cannot be treated and evaporates continuously in the water storage tank, seriously polluting the environment.

[0005] (3) After washing with water, the pyrolysis gas is cooled from 300°C to 400°C to less than 50°C, and the heat is taken away by the waste water, which wastes part of the energy

[0006] (4) Except for a small part of pyrolytic carbon used in steel mills, it has not become an industrial product that can be used so far, and it has become a solid waste that pollutes the environment

The composition of tar is complex, the molecular weight is different, and the separation is very difficult

[0008] (6) The oxygen content in the pyrolysis gas cannot be controlled, and the electrostatic coke catcher cannot be used, and there is a danger of explosion. Only water washing can be used to purify and decoke, resulting in a large amount of phenol-containing wastewater