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Biomass quick catalytic pyrolysis device and method

A technology for catalytic pyrolysis and biomass, which is applied in the field of devices for rapid catalytic pyrolysis of biomass, can solve the problems of high material requirements for moving parts, long gas retention time, difficult condensation of pyrolysis gas, etc., and achieves easy recovery of catalyst, regulation and control. Convenience and loss-reducing effect

Active Publication Date: 2018-09-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing mainstream pyrolysis reaction device: For the fluidized bed reactor, although it has no moving parts, simple structure, reliable operation, and uniform and sufficient collision, it needs a large amount of carrier gas, long gas residence time, and large heat loss. Problems such as difficult condensation of pyrolysis gas, serious wear and tear of the reactor, and large structure; for a moving mechanical reactor, although the structure is compact, the energy consumption is low, and the carrier gas can be used, there are also uneven temperature distribution and material requirements for moving parts. High, serious mechanism wear, poor sealing and other problems

Method used

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  • Biomass quick catalytic pyrolysis device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The cellulose particles with a moisture content of 5% and an average particle size of 1mm are sent to the rotary bed pyrolysis reactor 3 through the hopper 1 and the screw feeding system 2, and the feed rate is 150kg / h; the rotary bed pyrolysis reactor The diameter of the bottom surface of the rotary bed in 3 is 1000mm, the height is 250mm, and the rotation speed is 5.21r / min; the temperature of the flue gas in the heat exchange flue is 560°C, and the pyrolysis reaction temperature is 300°C. It is formed by extrusion of solid phosphoric acid The catalyst with a spherical diameter of 40mm, the filling amount is two-thirds of the rotating bed; after the pyrolysis product is separated from gas and solid and condensed from the pyrolysis gas, the three-phase pyrolysis product of coke, liquid and combustible gas is obtained, and the respective yields are 39%, 49% and 12%. Wherein the yield of target product L-glucosone is 13.8wt%.

Embodiment 2

[0045] The pine wood with a moisture content of 16% is crushed to an average particle size of 1mm, and dried to a moisture content of 8%, and sent to the rotary bed pyrolysis reactor 3 through the hopper 1 and the screw feeding system 2, and the feed amount is 150kg / h; in the rotating bed pyrolysis reactor 3, the diameter of the bottom surface of the rotating bed body is 1000mm, the height is 250mm, and the rotation speed is 5.21r / min; the flue gas temperature in the heat exchange flue is 740°C, and the pyrolysis reaction temperature is 500 ℃, using solid potassium phosphate extruded catalyst with a ball diameter of 30mm, the filling amount is two-thirds of the rotating bed body; after the pyrolysis product is separated from gas and solid and condensed from the pyrolysis gas, coke, liquid and combustible gas are obtained Three-phase pyrolysis products with respective yields of 30%, 47% and 23%. Wherein the relative content of the target product phenolic mixture in the pyrolys...

Embodiment 3

[0047] The bagasse is crushed to an average particle size of 1mm, and dried to a moisture content of 8%, and sent to the rotary bed pyrolysis reactor 3 through the hopper 1 and the screw feeding system 2, and the feed rate is 150kg / h; The diameter of the bottom surface of the rotating bed in the decomposition reactor 3 is 1000mm, the height is 250mm, and the rotation speed is 5.21r / min; the temperature of the flue gas in the heat exchange flue is 580°C, and the pyrolysis reaction temperature is 310°C, activated by steam Activated carbon extruded catalyst with a ball diameter of 40mm, the filling volume is two-thirds of the rotating bed body; after the pyrolysis product is separated from gas and solid and condensed from the pyrolysis gas, the three-phase pyrolysis product of coke, liquid and combustible gas is obtained , with yields of 51%, 36% and 13%, respectively. Wherein the yield of target product 4-ethylphenol is 3.4wt%.

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Abstract

The invention belongs to the technical field of biomass energy utilization, and particularly relates to a biomass quick catalytic pyrolysis device and method. The device comprises a hopper, a feed system, a revolving bed pyrolysis reactor, a gas-solid separation system, a pyrolysis gas condensation system, a flammable gas storage tank, a liquid collecting box, a solid coke collecting box, a burning system and a gas carrying and heat exchanging system, wherein the revolving bed pyrolysis reactor is composed of a revolving bed body, an airtight shell, a heat exchanging flue passage, a drive system, a spherical carrier and the like. After pretreatment, biomass particles enter into the revolving bed body and are subjected to quick catalytic pyrolysis under the effect of a catalyst, and generated pyrolysis gas is subjected to quick condensation to obtain certain bio-oil; non-condensing flammable gas and coke are collected and are used for burning and heat supply to achieve self-heating pyrolysis. The device can prepare high-grade liquid fuel or bio-oil containing rich high value-added chemicals by adjusting reaction working conditions and catalyst types.

Description

technical field [0001] The invention belongs to the technical field of biomass energy utilization, and in particular relates to a device and method for rapid catalytic pyrolysis of biomass. Background technique [0002] Pyrolysis is an important biomass utilization technology. When biomass is pyrolyzed under anaerobic conditions, the solid-liquid-gas three-phase pyrolysis products formed have high grade and application value. However, the selectivity of the reaction pathway in the conventional pyrolysis process of biomass is very poor, and the chemical composition of the generated bio-oil is extremely complex, and more than 400 kinds of organic compounds will be formed, and it has high oxygen content, low calorific value, strong corrosion, poor stability, etc. The disadvantage is that it can only be used as a low-grade liquid fuel in low-demand thermal equipment such as kilns. Moreover, the content of most substances in conventional bio-oil is very low, which makes separat...

Claims

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Application Information

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IPC IPC(8): C10G1/08C10B53/02
CPCC10B53/02C10G1/08Y02E50/10
Inventor 陆强谢文銮郭浩强张镇西杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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