Method and device for preparing low-moisture-content and low-acidity bio-oil through fast pyrolysis

A technology with low water content and bio-oil, which is applied in the preparation of biofuels, liquid hydrocarbon mixtures, and the petroleum industry. It can solve the problems of high water and acid content and difficult separation, and achieve the reduction of water content and acidity, and good dehydration and acid removal. , Improve the effect of calorific value and chemical application value

Inactive Publication Date: 2013-04-24
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method and device for preparing bio-oil with low water content and low acidity by rapid pyrolysis, so as to solve the problems of high water and acid content and difficult separation in bio-oil prepared by rapid pyrolysis of biomass

Method used

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  • Method and device for preparing low-moisture-content and low-acidity bio-oil through fast pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The biomass raw material is larch species, with a moisture content of 8.7% and a particle size of 0.9-1.2mm. First turn off the vacuum pump 9, heat the pyrolysis reactor 1 to 450°C, turn on the vacuum pump 9, turn on the first-stage condenser 4, the second-stage condenser 8 and the third-stage condenser 12, and continuously add the above-mentioned granular larch material to the heat The reactor 1 is decomposed, and the liquid in the temporary storage tank 10 enters the oil storage tank 14 through the one-way valve 11, and after feeding for 1 hour, the reaction ends. It is measured that the moisture content of the liquid in the vinegar liquid storage tank 13 is 60%, and the pH=3.5; the pH value of the oil storage tank 14 is 6.2, and the moisture content is 7.8%.

Embodiment 2

[0075] The biomass raw material is corn stalks with a moisture content of 7.9% and a particle size of 0.6-0.9mm. First turn off the vacuum pump 9, heat the pyrolysis reactor 1 to 550°C, turn on the vacuum pump 9, turn on the first-stage condenser 4, the second-stage condenser 8 and the third-stage condenser 12, and continuously add the above-mentioned granular larch material to the heat The reactor 1 is decomposed, and the liquid in the temporary storage tank 10 enters the oil storage tank 14 through the one-way valve 11, and after feeding for 1 hour, the reaction ends. It is measured that the moisture content of the liquid in the vinegar storage tank 13 is 65%, and the pH value is 3.3; the pH value in the oil storage tank 14 is 6.5, and the moisture content is 8.2%.

[0076] In one embodiment of the device of the present invention, the model of the pyrolysis reactor used is BJFU-FPOA-220, designed by Beijing Forestry University and produced by Beijing Kunlun Yongtai Technolog...

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Abstract

The invention relates to a method and a device for preparing low-moisture-content and low-acidity bio-oil through fast pyrolysis, and belongs to the technical field of biomass recycling and energy regeneration equipment. The method is characterized in that through control, the condensing temperature and the separation function of an organic steam permeable membrane separator are combined, so that the purpose of favorable dehydration and deacidification is achieved, and the late-stage refined dehydration and deacidification treatment of bio-oil is avoided. The device has the advantages that the moisture content and the acidity of the bio-oil collected finally are reduced greatly, the heat value and the chemical engineering application value of the bio-oil can be improved, and the application field of the bio-oil is expanded.

Description

technical field [0001] The invention relates to a method and a device for rapidly pyrolyzing bio-oil with low water content and low acidity, and belongs to the technical field of biomass regeneration and utilization and energy conversion equipment. Background technique [0002] Biomass, as a renewable and clean green energy, has a very broad application prospect. Biomass fast pyrolysis technology is a new type of biomass energy conversion technology that began in the 1970s. It adopts medium reaction temperature under the condition of isolation of air or a small amount of air, and uses short steam residence time to quickly pyrolyze biomass materials, and then undergoes quenching and concentration, and finally dark brown bio-oil is obtained. However, the bio-oil obtained by the conventional rapid pyrolysis of biomass has a high water content and high acidity, which has a great impact on its application as a biofuel or chemical raw material, especially in the synthesis of chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10B53/02C10B57/10
CPCY02E50/10
Inventor 常建民王文亮白甜甜田红星
Owner BEIJING FORESTRY UNIVERSITY
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