Use of screw extruder in preparing biofuel oil and fuel gas with biomass

A screw extruder and biofuel technology, which is applied in the field of comprehensive utilization of biomass, can solve the problems of low calorific value, high oxygen content, complex structure, etc. Effect

Inactive Publication Date: 2007-10-03
北京瑞增兰宇新能源科技有限公司
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  • Claims
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Problems solved by technology

The general structure of the above reactors is relatively complicated, the operation process is loaded down with trivial details, and the device volume is relatively large; Experimental research...

Method used

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  • Use of screw extruder in preparing biofuel oil and fuel gas with biomass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix and feed crushed rice straw raw material (0.5-0.8mm) with appropriate amount of water (weight ratio 10:3), add continuously from the hopper of the screw extruder, push through the single-screw extruder, and the heating rate is 10-30°C / min, the reaction temperature was controlled at 270°C, and the straw residence time was 20 min. The obtained gas and solid are separated; after the gas is condensed by a condenser, the output of combustible gas accounts for about 55% of the raw material. Bio-fuel is about 19%, calorific value is about 39.8MJ / kg, and oxygen content is less than 6%.

[0016] It can be seen from the accompanying drawings that the chromatographic peaks of the obtained biofuel substantially overlap with the chromatographic peaks of commercially available gasoline, diesel oil, and kerosene mixed samples. According to the results of mass spectrum peak analysis, the main components of the obtained biofuel are:

[0017] (1) Hydrocarbons mainly include: decan...

Embodiment 2

[0021] The crushed corn stalk raw material (1.0-1.5mm) is mixed with an appropriate amount of water and fed evenly (weight ratio 10:5), continuously fed from the hopper of the screw extruder, and pushed through the single-screw extruder, and the heating rate is 10-30°C / min, the temperature is controlled at 320°C, and the residence time is 60min. The obtained gas is separated from the solid; after the gas is condensed by the condenser, the output of combustible gas accounts for about 52% of the raw material, biofuel is about 15%, the calorific value is about 40MJ / kg, and the oxygen content is less than 6%.

Embodiment 3

[0023] Mix crushed soybean stalks (10-15mm) with an appropriate amount of water and feed them uniformly (weight ratio 10:4), add them continuously from the hopper of the screw extruder, push them through the twin-screw extruder, and heat up at a rate of 10-30°C / min, the temperature is controlled at 350°C, and the residence time is 30min. The obtained gas is separated from the solid; after the gas is condensed by the condenser, the output of combustible gas accounts for about 65% of the raw material, biofuel is about 17%, the calorific value is about 38.5MJ / kg, and the oxygen content is less than 6%.

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Abstract

The present invention belongs to the field of comprehensive biomass utilizing technology, and is especially use of screw extruder in preparing biofuel oil and fuel gas with biomass. Screw extruder is utilized in compressing water-containing biomass material, and by means of regulating the staying time of the biomass material in the heating area of the screw extruder, biofuel oil and fuel gas with low oxygen content and high heat value may be produced. In the product, fuel gas accounts for 50-70 % and biofuel oil 10-20 %, and the obtained biofuel oil has heat value of 30-46 MJ/kg and oxygen content less than 6 %.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of biomass, in particular to the application of a screw extruder in the process of thermal conversion of biomass to prepare bio-fuel (including gasoline, diesel and kerosene fractions) and combustible gas. Background technique [0002] Yuan Zhenhong, Wu Chuangzhi and others edited the book "Principles and Technologies of Biomass Energy Utilization" (Chapter 5, Section 1, Pages 149-153), pointing out that at present, the technology of screw extruding biomass is widely used in biomass compression molding. In the process, there is no report on the application of biomass thermochemical conversion process. The device for preparing liquid fuel and combustible gas by thermochemical conversion of biomass is described in detail in the book "Principles and Technologies of Biomass Energy Utilization" (Chapter 8, Section 2, pp. 296-299) edited by Yuan Zhenhong and Wu Chuangzhi. Introduction...

Claims

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Application Information

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IPC IPC(8): C10G1/00
Inventor 杨正宇郭仕鹏王超李玲
Owner 北京瑞增兰宇新能源科技有限公司
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