A method and device for preparing low water content and low acid bio-oil by rapid pyrolysis

A low water content, bio-oil technology, used in the preparation of biofuels, liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of difficult separation, high water and acid content, reduce water content and acidity, good dehydration and acid removal, The effect of expanding the field of application

Inactive Publication Date: 2014-10-22
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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  • A method and device for preparing low water content and low acid bio-oil by rapid pyrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0073] The biomass raw material is larch tree 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 granular larch to the heat In the decomposition reactor 1, the liquid in the temporary storage tank 10 enters the oil storage tank 14 through the one-way valve 11, and the reaction ends after 1 hour of feeding. It is measured that the water content of the liquid in the vinegar storage tank 13 is 60%, and the PH=3.5; the pH value of the oil storage tank 14 is 6.2, and the water 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 granular larch to the heat In the decomposition reactor 1, the liquid in the temporary storage tank 10 enters the oil storage tank 14 through the one-way valve 11, and the reaction ends after 1 hour of feeding. It is measured that the liquid water content 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 water content is 8.2%.

[0076] In an embodiment of the device of the present invention, the model of the pyrolysis reactor used is BJFU-FPOA-220, which is designed by Beijing Forestry University and produced by Beijing Kunlun Yongtai Technology Co., Ltd. The cyclone separat...

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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 preparing bio-oil with low water content and low acidity by rapid pyrolysis, and belongs to the technical field of biomass regeneration and utilization and energy equipment. Background technique [0002] Biomass, as a renewable and clean green energy, has a broad application prospect. The rapid biomass pyrolysis technology is a new type of biomass energy conversion technology that began in the 1970s. It uses a medium reaction temperature under the condition of isolating air or a small amount of air, and uses a short steam residence time to quickly pyrolyze biomass materials, and then quench and concentrate, and finally obtain dark brown bio-oil. However, the high water content and acidity of the bio-oil obtained by the conventional rapid pyrolysis of biomass has a great impact on its application as biofuels or chemical raw materials, especially when the bio-oil is used in the synthesis of adhesives and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10B53/02C10B57/10
CPCY02E50/14Y02E50/10
Inventor 常建民王文亮白甜甜田红星
Owner BEIJING FORESTRY UNIVERSITY
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