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Method for coproducing methane and solid formed fuel by using herbaceous wood fiber as raw material

A technology of lignocellulosic raw material and solid briquette fuel, which is applied in the direction of solid fuel, fuel, biofuel, etc., to achieve the effects of easy crushing, energy utilization, good use performance and storage performance

Active Publication Date: 2011-05-18
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the shortage of biogas fermentation residue utilization in the prior art, and provide a method of using herbaceous lignocellulosic raw materials to co-produce biogas and solid briquette fuel, so as to improve the energy recovery efficiency of raw materials and solve the problem of biogas fermentation residue Disposal of the problem

Method used

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  • Method for coproducing methane and solid formed fuel by using herbaceous wood fiber as raw material

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Embodiment 1

[0020] Using rice straw as herbaceous lignocellulosic raw material, first crush it with a hay cutter to make the particle size less than 40mm; then carry out biogas fermentation, control the solid concentration of biogas fermentation to 40%, the temperature is 55°C, and the fermentation time is 35 days; after the fermentation is completed Finally, take out the biogas residue, and then use a rotary cylinder dryer and a double-drum re-crusher for drying and secondary crushing, so that the moisture content and particle size are controlled at 6% to 12% and below 5mm respectively; finally, screw extrusion is used to The compression molding machine is used for compression molding, and the molding temperature is adjusted at 220 ° C to 280 ° C; after cooling and packaging, the commercialized solid molding fuel can be obtained.

Embodiment 2

[0022] Corn stalks are used as the herbaceous lignocellulosic raw material, first crushed with a hay cutter to make the particle size less than 40mm; then biogas fermentation is carried out, the solid concentration of the biogas fermentation is controlled at 30%, the temperature is 30°C, and the fermentation time is 45 days; to be fermented After the end, the biogas residue is taken out, and the vertical air dryer and the double-drum re-crusher are used for drying and secondary crushing, so that the moisture content and particle size are controlled at 6% to 12% and below 5mm respectively; finally, the screw extrusion is used The compression molding machine is used for compression molding, and the molding temperature is adjusted at 220 ° C to 280 ° C; after cooling and packaging, the commercialized solid molding fuel can be obtained.

Embodiment 3

[0024] Using hybrid pennisetum as herbaceous lignocellulosic raw material, first crush it with a hay cutter to make the particle size less than 40mm; then carry out biogas fermentation, control the solid concentration of biogas fermentation to 20%, the temperature is 38°C, and the fermentation time is 25 days; After the fermentation is over, take out the biogas residue, and then use a vertical air dryer and a double-drum re-crusher for drying and secondary crushing, so that the moisture content and particle size are controlled at 10% to 20% and below 5mm respectively; finally, the piston is used to The extrusion molding machine performs compression molding, and the molding temperature is adjusted at 140°C to 200°C; after cooling and packaging, the commercialized solid molding fuel can be obtained.

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Abstract

The invention provides a method for coproducing methane and solid formed fuel by using herbaceous wood fibers as a raw material. The method comprises the following steps of: (1) material crushing: reducing the particle size of the herbaceous wood fiber raw material to be below 40 mm; (2) methane fermentation: controlling the solid concentration of methane fermentation to be 20%-40%; (3) methane residue drying, which ensures the water content of the dried methane residues is 6%-20%; (4) secondary crushing: performing the secondary crushing for the dried methane residues to ensure that the particle size is less than 5 mm; (5) compression forming; and (6) cooling and packaging. The method solves the problem of the disposition of the methane residues, realizes full energy utilization of resources and improves the economic benefit of straw utilization.

Description

technical field [0001] The invention belongs to the field of biomass energy, and relates to an energy utilization method of herbaceous lignocellulosic raw materials, and more specifically, relates to a method for simultaneously producing biogas and solid briquettes by using herbal lignocellulosic raw materials. technical background [0002] Herbaceous lignocellulosic raw materials mainly include crop straw (such as rice straw, corn stalk, wheat straw) and some herbaceous plants (such as switchgrass, Digrass, Miscanthus, Pennisetum). In addition to a large number of wild herbaceous plants, my country produces hundreds of millions of tons of straw resources every year. In 2005, the national output of rice straw, corn straw and wheat straw was 211 million tons, 202 million tons and 107 million tons respectively, accounting for 25.10%, 24.00% and 12.73% of the total national straw respectively. At present, the utilization methods of straw mainly include energy utilization, dire...

Claims

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Application Information

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IPC IPC(8): C12P5/02C10L5/44
CPCY02E50/343Y02E50/30Y02E50/10
Inventor 李东孙永明袁振宏孔晓英李连华甄峰李志兵马隆龙王忠铭吕鹏梅庄新姝许敬亮
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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