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

A biomass and infrared heat technology, applied in the direction of biofuel, coke oven heating, combustible gas purification, etc., can solve the problems of increased processing costs, atmospheric environmental pollution, waste of hydrocarbon energy, etc., to reduce pyrolysis by-products, Good pyrolysis effect and high recovery efficiency

Inactive Publication Date: 2021-06-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 increase

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0036] like Figure 1 to Figure 3 As shown, the red mud catalyzed biomass infrared pyrolysis pyrolysis device according to the present invention has components including a gas supply system, a pyrolysis reaction system, a product detection and recovery system. The specific structure and connection relationship of the components are:

[0037]The gas supply system includes a gas cylinder 1, a gas mass flow meter 2, a steam generator 3, and a mixed gas preheater 4, all of which are connected by a stainless steel air duct with a diameter of 3 to 5 mm. The gas mass flowmeter 2 is connected, the gas mass flowmeter 2 is connected to the inlet pipe of the gas preheater 4 through the gas guide pipe, the steam generator 3 is connected to the second gas mass flowmeter 2-1, and the second gas mass flowmeter 2-1 The other end is connected to the inlet pipe of the mixed gas preheater 4, the outlet pipe of the mixed gas preheater 4 is connected to the inlet of the heater 5, and the outlet o...

Embodiment 2

[0043] An example of a pyrolysis method suitable for the pyrolysis device of the red mud catalytic biomass infrared pyrolysis, the pyrolysis device is connected according to the connection method described in Example 1, and 100 g of dried biomass is added to On the reaction plate 11 of the reactor 8, the gas that enters the gas cylinder 1 is preferably nitrogen, that is, biomass is pyrolyzed under a nitrogen atmosphere, and the gas flow rate is 200ml / min. First, check the airtightness of the device and open the gas outlet valve 22. Adjust the temperature of the mixed gas preheater 4 to 300°C, the temperature of the steam generator 3 to 120°C, and the temperature of the heater 5 to 600°C. When all the adjusted temperatures rise to the adjusted temperature, the biomass in the reactor 8 The pyrolysis reaction starts, and the coke in the obtained product is about 24.33%, the tar product is about 40.82%, and the gas product is about 28.75%.

Embodiment 3

[0045] Another example of a pyrolysis method suitable for the red mud catalyzed biomass infrared pyrolysis pyrolysis device, the pyrolysis device is connected according to the connection method described in Example 1, and the gas in the gas cylinder is preferably nitrogen , that is, pyrolyze under a nitrogen atmosphere, take the nitrogen flow rate of 200ml / min, first check the airtightness of the device, open the gas outlet valve 22, adjust the temperature of the mixed gas preheater 4 to 300°C, and adjust the temperature of the steam generator 3 to 120°C, when all the adjusted temperatures rise to the adjusted temperature, the biomass is crushed to 0.2-0.45mm, the red mud is ground to below 200 mesh, and a total of 200g of dried red mud and biomass are added to the reactor 8 On the reaction plate 11, turn on the heater 5 for pyrolysis, the temperature of the heater 5 is 600°C; the ratio of biomass to red mud is 1:1, the coke in the obtained product is about 25.23%, the tar prod...

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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...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B53/00C10B23/00C10B57/00C10K1/02C10K1/04
CPCC10B53/02C10B53/00C10B23/00C10B57/00C10K1/026C10K1/046Y02E50/10
Inventor 胡二峰田宜水李沫杉伊枭剑马大朝刘壮戴重阳
Owner CHONGQING UNIV
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