Method for comprehensively utilizing crop straw

A technology for crop straw and straw, which is applied in the field of solid waste resource treatment to achieve the effect of increasing utilization value

A technology for crop straw and straw, which is applied in the field of solid waste resource treatment to achieve the effect of increasing utilization value

CN103255178AInactive Publication Date: 2013-08-21JIANGNAN UNIV
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  • Method for comprehensively utilizing crop straw

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the preparation of gac

[0018] Raw material processing: cleaning and drying the anaerobic fermentation residue of straw. Then, zinc chloride was formulated into a solution of about 50 degrees Baume. After filtering, the pH value is adjusted to 6 with hydrochloric acid, and then poured into the raw materials in a ratio of 3-4, that is, 300-400 catties of adjusted zinc chloride solution is added for every hundred kg of raw materials. Immerse at a temperature above 40-50°C, stir well and let stand for 5 hours, stir again and let stand for 5 hours, so that the zinc chloride solution is completely absorbed, if not fully absorbed, then extend the time.

[0019] Carbonization and activation: Put the mixed raw materials into a carbonization furnace and heat them in a closed carbonization furnace. The carbonization temperature is 300-450°C for about 30-60 minutes. For carbonization, pay attention not to see open flames, and constantly turn over the material to m...

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Abstract

Crop straw is one of the richest biomass energy resources. At present, most straws are consumed in modes of combustion, padding and the like. If the straw is combusted, a great amount of biomass resources are lost, environmental pollution is caused, the traffic security is affected and fire risk is caused. The invention provides a method for realizing resource treatment and comprehensive utilization of the crop straw. According to the method, a part of methane generated through anaerobic fermentation of the crop straw is used as energy and the methane residue is used as the raw material to prepare activated carbon, so that the comprehensive utilization of the crop straw as energy / resource is realized, biomass energy, namely methane and activated carbon, can be obtained, and the utilization value of the crop straw is increased.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing crop stalks to produce energy and resources, and belongs to the technical field of solid waste resource treatment. Specifically, part of the biogas produced by anaerobic fermentation of crop straw is used as energy, and the residual solid of straw anaerobic fermentation—biogas residue is used to prepare activated carbon. Make full use of straw resources. Background technique [0002] Crop stalks are one of the most abundant sources of biomass energy in the world. Our country is very rich in straw resources, producing nearly 700 million tons per year. Straw is mainly composed of cell contents such as cellulose, hemicellulose, soluble protein and sugar. At present, most of the straw is consumed in the form of fuel and litter. Straw burning not only loses a large amount of biological resources and causes environmental pollution, but also produces a large amount of smoke in the intensive st...

Claims

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Application Information

Patent Timeline
21 Aug 2013
Publication
CN103255178A
IPC
C12P5/02; C01B31/08; C01B32/324; C01B32/348
CPC
Y02E50/343; Y02E50/30
Inventors
邹华; 王震