Pyrolysis device and pyrolysis method for infrared pyrolysis of red mud catalyzed biomass

Abstract

The invention relates to a pyrolysis device and a pyrolysis method for infrared pyrolysis of red mud catalyzed biomass. The pyrolysis device comprises a gas supply system, a pyrolysis reaction system and a product detection and recovery system. A gas cylinder, a gas mass flowmeter, a mixed gas preheater and a steam generator of the gas supply system are connected through a gas guide pipe. Tubular infrared heating elements of an infrared heating device are arranged around a pyrolysis reactor of the pyrolysis reaction system, a quartz plate with holes is mounted in the center of the pyrolysis reactor, and the product detection and recovery system is used for analyzing gas components on line. With the adoption of the device and the method, rapid temperature rise in the biomass pyrolysis process can be realized, the biomass and the red mud are subjected to innocent treatment through the device and the pyrolysis method based on the device, and high-quality tar and pyrolysis gas are obtained under the action of catalytic pyrolysis.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a pyrolysis device and a pyrolysis method for red mud catalyzed infrared pyrolysis of biomass. Background technique [0002] Red mud is the industrial solid waste discharged when the aluminum industry extracts alumina. With the development of the aluminum industry and the reduction of the grade of bauxite ore, the amount of red mud will increase, and the red mud is an alkaline substance. With the shower of rainwater, the alkali in the red mud will be dissolved, which may pollute the surface water and groundwater. The prospects for the utilization of biomass and red mud in our country are quite promising. [0003] Biomass includes agricultural product processing residues, forestry woody residues, animal manure, etc., and the annual biomass production worldwide is huge, reaching hundreds of billions of tons. my country's biomass resource reserves equivalent to s...

AI Technical Summary

Problems solved by technology

At present, biomass treatment methods are mainly incineration or no treatment. Incineration of biomass is a great waste of hydrocarbon energy in biomass, and it will also cause serious pollution to the atmospheric environment.

The mainstream treatment methods for red mud include dam-building wet storage, recycle part of the lye by natural sedimentation and separation, and dry and dehydrate the red mud for storage. Some enterprises use dry storage, although the storage volume and availability are reduced. Increase the height of stockpiling, but the processing cost increases, and land still needs to be occupied. At the same time, there is sufficient rain in the south, and it is easy to cause land alkalization and water pollution, etc.

[0004] Pyrolysis is a very good method to obtain energy from waste energetic materials. More tar and pyrolysis gas can be obtained through pyrolysis of coal and biomass. Red mud contains Al 2 o 3 , Fe 2 o 3 Some researchers have obtained higher tar yields by separately pyrolyzing biomass and pure metal oxide catalysts, but there is little research and development on biomass and red mud co-pyrolysis devices.

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