Pyrolysis and gasification cracking furnace for solid biomass

Abstract

The invention discloses a pyrolysis and gasification cracking furnace for solid biomass, comprising an upper boiling gasification furnace, a middle catalytic pyrolysis section and a lower fuel gas primary purifying chamber, wherein the boiling gasification furnace is obliquely arranged above the fuel gas primary purifying chamber; a spile fire grate capable of adjusting the inserting depth is arranged at the upper part of the fuel gas primary purifying chamber; a gasification agent inlet and a gasification agent spraying nozzle are arranged at the bottom of the boiling gasification furnace; afuel gas outlet is arranged below the spile fire grate; and a material inlet and an ignition hole are arranged at the upper part of the boiling gasification furnace. The invention can be used for pyrolyzing and gasifying straws and solid wastes of agriculture and forestry and can be also used for incinerating solid domestic wastes in cities and towns and sludge which is dehydrated and dried by sewage treatment plants and acquiring energy sources; tar particles generated by gasification are cracked, large part of carbon dioxide is reduced and the yield of combustible gas can be increased; the fuel gas has high quality and no tar so as to be beneficial to purification; and the gasification temperature is high, so that harmful gases such as dioxin and the like can be avoided.

Description

Technical field: [0001] The invention relates to a solid biomass pyrolysis gasification cracking furnace, which belongs to the technical field of renewable energy conversion. Background technique: [0002] my country produces more than 1.5 billion tons of agricultural and forestry solid waste such as straw, urban solid domestic waste, and dewatered sludge from sewage treatment plants. Except for a few that are used, most of them are randomly incinerated, discarded or landfilled. Solid biomass has become one of the important sources of environmental pollution. At the same time, these wastes are also renewable energy resources, equivalent to more than 600 million tons of standard coal. In recent decades, people have done a lot of work to prevent pollution and obtain energy, and have carried out a series of beneficial attempts, among which large-scale demonstrations mainly include straw and waste power generation projects, and straw gasification centralized gas supply projects....

AI Technical Summary

Problems solved by technology

Generally, in small-scale straw gasification stations, tar and sewage cannot be used and disposed of scientifically, which not only causes waste of resources, but also causes secondary pollution of the environment

Furthermore, due to the limitation of project scale and operating conditions, the gasification efficiency of the device is not high, the gas tar content is high, and the calorific value is low. It is mainly used for residential cooking and small internal combustion power generation projects.

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