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Atomization combustion method for biomass gas-dissolved pyrolysis oil

A combustion method and pyrolysis oil technology, applied in the direction of combustion methods, burners, lighting and heating equipment, etc., can solve the problems of atomization effect affecting combustion effect, easy flameout, insufficient combustion, etc., to improve the effect of spray atomization , increase the flame temperature, improve the effect of mixing quality

Active Publication Date: 2021-08-20
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN107795982A discloses a mixed combustion process of biomass-dissolved gas pyrolysis oil and pyrolysis gas. The poor atomization effect directly affects the post-combustion effect. When the biomass dissolved gas pyrolysis oil burns, it is easy to extinguish the flame and the combustion is not sufficient.

Method used

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  • Atomization combustion method for biomass gas-dissolved pyrolysis oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] according to figure 1 As shown in the process flow chart, the pyrolysis gas generated during the biomass pyrolysis process is pretreated, and the pyrolysis gas is kept warm to 65°C through the heat preservation device. After removing the residual carbon particles mixed with the pyrolysis gas, the silica gel desiccant is used Dry the pyrolysis gas to a moisture content of 0.5%;

[0045] according to figure 1 In the process flow chart shown, the pyrolysis oil produced in the biomass pyrolysis process is pretreated. Firstly, the large particle impurity components in the pyrolysis oil are removed so that the particle size of the impurities in the pyrolysis oil is less than 10 μm, and then the pyrolysis oil is left to stand Cool down, the temperature of the pyrolysis oil is reduced to 45°C;

[0046] After the pyrolysis oil and pyrolysis gas are pretreated, the pyrolysis gas is pressurized to 4.2 MPa by an air compressor, and the pyrolysis oil is placed in a pressure dissol...

Embodiment 2

[0051] according to figure 1 As shown in the process flow chart, the pyrolysis gas produced in the biomass pyrolysis process is pretreated, and the pyrolysis gas is kept warm to 80°C through the heat preservation device. After removing the residual carbon particles mixed with the pyrolysis gas, the silica gel desiccant is used. Dry the pyrolysis gas to a moisture content of 0.2%;

[0052] according to figure 1 As shown in the process flow chart, the pyrolysis oil produced in the biomass pyrolysis process is pretreated. Firstly, the large particle impurity components in the pyrolysis oil are removed, and after the particle size of the impurities in the pyrolysis oil is less than 8 μm, the standing Cooling down, the temperature of the pyrolysis oil is reduced to 60°C;

[0053] After pretreatment of the pyrolysis oil and pyrolysis gas, the pyrolysis gas is pressurized to 5MPa by an air compressor, and the pyrolysis oil is placed in a pressure dissolved gas tank. The height of t...

Embodiment 3

[0057] according to figure 1 As shown in the process flow chart, the pyrolysis gas generated during the biomass pyrolysis process is pretreated, and the pyrolysis gas is kept at 70°C by the heat preservation device. After removing the residual carbon particles mixed with the pyrolysis gas, the silica gel desiccant is used Dry the pyrolysis gas to a moisture content of 0.8%;

[0058] according to figure 1 As shown in the process flow chart, the pyrolysis oil produced in the biomass pyrolysis process is pretreated. Firstly, the large particle impurity components in the pyrolysis oil are removed, and after the particle size of the impurities in the pyrolysis oil is <6 μm, the standing Cool down, the temperature of the pyrolysis oil is reduced to 50°C;

[0059] After the pyrolysis oil and pyrolysis gas are pretreated, the pyrolysis gas is pressurized to 4.5MPa by an air compressor, and the pyrolysis oil is placed in a pressure dissolved gas tank. The height of the pyrolysis oil ...

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Abstract

The invention belongs to the technical field of biomass gas-dissolved pyrolysis oil combustion, and particularly relates to an atomization combustion method for biomass gas-dissolved pyrolysis oil. The atomization combustion method for the biomass gas-dissolved pyrolytic oil provided by the invention comprises the following steps that pyrolysis gas and pyrolysis oil are subjected to pressurized gas dissolving to obtain gas-dissolved pyrolysis oil; and atomization combustion is conducted on the gas-dissolved pyrolysis oil by using the pyrolysis gas as an atomizing agent. According to the atomization combustion method for the biomass gas-dissolved pyrolysis oil, the pyrolysis gas and the pyrolysis oil are subjected to pressurized gas dissolving to obtain the gas-dissolved pyrolysis oil, under the micro-explosion effect of bubbles, oil drops are subjected to secondary crushing, thus, the particle size is reduced, the total contact surface area of the pyrolysis oil and oxygen is increased, reflow disturbance of tiny liquid drops caused by the instant impact effect of gas phase jet flow is also increased, accordingly, rapid evaporation and diffusion of pyrolysis oil drops are achieved, and the mixing quality of pyrolysis oil and air can be obviously improved; and therefore, the atomization combustion effect of the pyrolysis oil is effectively improved, and the pyrolysis oil can be stably and fully atomized and combusted.

Description

technical field [0001] The invention belongs to the technical field of biomass-dissolved gas pyrolysis oil combustion, and in particular relates to an atomized combustion method of biomass-dissolved gas pyrolysis oil. Background technique [0002] Biomass pyrolysis is an important biomass utilization method, which is of great significance for improving the comprehensive benefits of agriculture and reducing environmental pollution. [0003] Biomass-dissolved gas pyrolysis oil is a kind of biomass pyrolysis carbonization product. 5-15% of the energy in biomass is converted into biomass-dissolved gas pyrolysis oil during the pyrolysis process. The heat of biomass-dissolved gas pyrolysis oil The value is 20-30MJ / Kg. Pyrolysis oil is gaseous at high temperature, and some components condense into dark brown viscous liquid below 200°C. Pyrolysis oil contains harmful substances to human body, such as cyclopentenone, furfural, furfurone and phenol, etc. Derivatives, improper handli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D11/10F23K5/22
CPCF23D11/101F23K5/22Y02E50/10
Inventor 赵立欣姚宗路谢腾霍丽丽贾吉秀郝晓文
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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