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Method for preparing stalk charcoal and stalk vinegar liquid form stalks of cropper

A technology for crop straw and straw charcoal, which is applied in the manufacture of biofuels, pyrolignoic acid, special forms of dry distillation, etc., can solve the problems of environmental pollution, low utilization rate of straw, and poor economic benefits, and achieves increasing soil fertilizer efficiency and improving soil. The effect of hardening

Inactive Publication Date: 2005-01-12
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Technical problem: The purpose of this invention is to provide a method for producing straw charcoal and straw vinegar from crop straws, which solves the shortcomings of low utilization rate of crop straws, poor economic benefits, and environmental pollution.

Method used

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  • Method for preparing stalk charcoal and stalk vinegar liquid form stalks of cropper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put the raw material of rice straw into the retort, use the pyrolysis process with the final carbonization temperature of 300°C and 4.5 hours to produce rice straw charcoal and grass vinegar liquid, the solid is cooled to obtain straw charcoal, and the pyrolysis gas is separated into gas and liquid to obtain straw Vinegar liquid and combustible gas, the combustible gas obtained by gas-liquid separation is returned to the combustion chamber to provide heat source for pyrolysis reaction.

[0013] The yield of straw charcoal is 48.23%, and the yield of grass vinegar is 33.46%.

[0014] The chemical composition of rice straw charcoal prepared by pyrolysis process at 300°C for 4.5 hours:

[0015] Ash 36.23%

[0016] Volatile matter 23.45%

[0017] Fixed Carbon 40.32%

Embodiment 2

[0019] Put the raw material of rice straw into the retort, use the pyrolysis process with the final carbonization temperature of 500°C and 5 hours to prepare rice straw charcoal and grass vinegar liquid, and the solid is cooled in the retort to obtain straw charcoal; the pyrolysis gas is separated by gas and liquid Grass vinegar liquid and combustible gas are obtained, and the combustible gas obtained by gas-liquid separation is returned to the combustion chamber to provide heat source for pyrolysis reaction.

[0020] The yield of straw charcoal was 38.00%, and the yield of grass vinegar was 36.00%. Elemental composition of straw charcoal:

[0021] K 3.10%

[0022] Na 2718.02mg / kg

[0023] Ca 1.30%

[0024] N 8180mg / kg

[0025] Mg 2866.28mg / kg

[0026] Zn 39.18mg / kg

[0027] Fe 818.42mg / kg

[0028] Cu 23.39mg / kg

[0029] P 3957.57mg / kg

[0030] Al 833.41mg / kg

[0031] Ni 16.64mg / kg

[0032] B 60.42mg / kg

[0033] M...

Embodiment 3

[0039] Put the corn stalk raw material into the retort, and use the pyrolysis process with the final carbonization temperature of 500°C and 5 hours to produce corn stalk charcoal and corn stalk vinegar liquid. The solid is cooled to obtain corn stalk charcoal, and the pyrolysis gas is passed through gas-liquid Corn stalk vinegar liquid and combustible gas are obtained through separation, and the combustible gas obtained through gas-liquid separation is sent back to the combustion chamber to provide heat source for pyrolysis reaction.

[0040] The yield of corn stalk charcoal is 30.00%, and the yield of corn stalk vinegar is 37.00%

[0041] Chemical composition of corn stalk charcoal:

[0042] Ash 9.03%

[0043] Volatile 16.16%

[0044] Fixed Carbon 74.81%

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Abstract

A method for preparing straw charcoal and straw vinegar liquid includes placing agricultural straw into retort for pyrolytic reaction of 4-12 h. at 300-600 deg.C under condition of oxygen being isolated or being provided with limitation; obtaining straw charcoal from solids through drying, precharring, charring and calcining; obtaining straw vinegar liquid and combustible gas by arrying out gas-liquid separation of pyrolysis gas and sending combustible gas back to combustion chamber as heating source.

Description

technical field [0001] The invention relates to a method for preparing crop straw charcoal and a corresponding liquid product-straw vinegar liquid through a high-temperature pyrolysis method, and relates to the technical field of comprehensive and efficient utilization of crop straws. [0002] Its characteristic is to use any kind of straw in the crop straw, and make straw charcoal into compound fertilizer for crops and various fruit trees, soil improver for improving soil compaction, adjusting soil moisture, etc., slow-release agent for chemical fertilizers and pesticides, etc.; straw After processing, the vinegar solution can be made into foliar fertilizer for crops and various fruit trees (with the functions of insect control, disease prevention and plant growth regulation), disinfectant and deodorant for livestock and poultry places. Background technique [0003] It is estimated that there are 1.5 billion mu of arable land in my country, and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10C5/00
CPCY02E50/14Y02E50/10
Inventor 张齐生周建斌倪传根
Owner NANJING FORESTRY UNIV
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