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Method for improving creosote content in biomass molding fuel tar

A technology for briquetting fuel and biomass, which is applied in the field of pyrolysis of biomass briquetting fuel, can solve the problems of environmental pollution, low replacement ratio, waste, etc., and achieve the effects of high efficiency, increasing replacement ratio, and improving utilization efficiency.

Inactive Publication Date: 2015-01-28
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The total relative content of creosote in the tar by-products is less than 80% in the conventional process for preparing shaped carbon (only with hot air as the pyrolysis medium) at present, which causes the substitution ratio of the tar by-products to partially replace phenol in the synthesis reaction of phenolic resin adhesives is not high (less than 25%), tar by-products cannot be fully utilized to form waste, and then cause environmental pollution

Method used

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Examples

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Embodiment 1

[0017] 1. A pyrolysis method for biomass briquettes, which is suitable for the production process of preparing briquettes by pyrolyzing rod-shaped fuels made of pine chips, fir chips and hard miscellaneous wood chips as raw materials under oxygen-containing ambient conditions. Under alkaline air atmosphere conditions V NH3 :V 空气 =(1-3):100, to pyrolyze biomass briquette fuel, the final pyrolysis temperature is 600-850°C, the heating rate of the pyrolysis process is 15-30°C / hour, and the ammonia gas is produced by heating with ammonia water , the heating temperature is 300-500°C. This pyrolysis method can significantly change the composition of biomass briquette pyrolysis tar, and the total relative content of creosote can be increased from less than 80% in the conventional process (only using hot air as the pyrolysis medium) to 85%- 92%, and the substitution ratio of tar by-products in the partial substitution of phenol in the synthesis reaction of phenolic resin adhesives i...

Embodiment 2

[0019] A kind of pyrolysis method of biomass briquette fuel, V under basic air atmosphere condition NH3 :V 空气 =1:100, pyrolyze hard miscellaneous sawdust molding fuel, the final pyrolysis temperature is 600°C, the heating rate of the pyrolysis process is 15°C / hour, and the ammonia gas is produced by heating with ammonia water, and the heating temperature is 300°C. This pyrolysis method can significantly change the composition of biomass briquette pyrolysis tar, wherein the total relative content of creosote can be increased from less than 80%wt in conventional processes (only using hot air as the pyrolysis medium) to 85% wt, the proportion of tar by-products in the partial substitution of phenol in the synthesis of phenolic resin adhesives increased from 25%wt to 30%wt.

Embodiment 3

[0021] A kind of pyrolysis method of biomass briquette, under alkaline air atmosphere condition (V NH3 :V 空气 =2:100), to pyrolyze pine sawdust molding fuel, the final pyrolysis temperature is 700°C, and the heating rate during the pyrolysis process is 20°C / hour, wherein ammonia is produced by heating ammonia water, and the heating temperature is 400°C. This pyrolysis method can significantly change the composition of biomass briquette pyrolysis tar, wherein the total relative content of creosote can be increased from less than 80%wt in conventional technology (only using hot air as pyrolysis medium) to 88% wt, the proportion of tar by-products in the partial substitution of phenol in the synthesis of phenolic resin adhesives increased from 25%wt to 40%wt.

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Abstract

The invention discloses a method for improving creosote content in biomass molding fuel tar and is suitable for a production technology for preparing molding charcoal through the pyrolysis of a rodlike fuel briquetted by the raw materials of pine chips, fir chips and hard mixed wood chips under the condition of an oxygen containing environment. The biomass molding fuel is pyrolyzed under an alkaline air atmosphere (VNH3: V air = (1-3): 100), and ammonia gas is produced in a mode of heating ammonia water. The constituents of the tar pyrolyzed by the biomass molding fuel can be obviously changed by the pyrolysis method. The total creosote relative content can be improved from less than 80wt% to 85-92wt%, the substitution ratio of the tar byproduct in the reaction of substituting part of phenol and synthesizing a phenolic resin adhesive is increased from 25% to 30-50%, the pollution of the tar byproduct to the environment in the production process of the biomass molding fuel can be reduced, and the preparing cost of the phenolic resin adhesive is reduced.

Description

technical field [0001] The invention relates to a pyrolysis method of biomass briquette fuel, in particular to a production process for preparing briquette charcoal by pyrolyzing rod-shaped fuel made of pine wood chips, Chinese fir wood chips and hard miscellaneous wood chips as raw materials under oxygen-containing ambient conditions A method for increasing the creosote content of medium tar. Background technique [0002] my country has abundant biomass resources, and the annual output of solid briquette fuel made from wood chips is about 150,000 tons. It can be further pyrolyzed to produce briquette briquettes, and the resulting tar by-products are about 50,000 tons per year. Ten thousand tons, tar is a black viscous liquid containing some creosote, including phenol, 2-methylphenol, 4-methylphenol, 2-methoxyphenol, 3,4-dimethylphenol, 2-ethylphenol, etc. Phenols are harmful to the environment. Therefore, the development and utilization of tar by-products in the preparation...

Claims

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Application Information

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IPC IPC(8): C10B53/02
CPCC01B32/30C10C1/19Y02E50/10
Inventor 刘石彩杨华黄丽邓先伦蒋剑春
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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