Preparation technology of hard charcoal

A preparation process, biochar technology, applied in the field of agricultural resources and environment, can solve the problems of ineffective reduction of heavy metal content, reduction of migration and bioavailability, contamination of operator's clothes, etc., to reduce the content of heavy metals and organic pollutants, Improve the practical value and avoid the effect of staining clothes

Active Publication Date: 2017-08-04
朱拥军 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, the biochar prepared by the existing technology generally changes the form of heavy metals in the soil and passivates them to reduce their migration and bioavailability in the environment, which cannot effectively reduce the content of heavy metals; On the one hand, the biochar prepared by the existing process is black. During transportation and use, the operator is easy to come into contact with the biochar, which will cause the operator's clothes and hands to be stained by the black biochar, which is not easy to wash. Inconvenient to use

Method used

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  • Preparation technology of hard charcoal
  • Preparation technology of hard charcoal
  • Preparation technology of hard charcoal

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preparation example Construction

[0032] The preparation technology of a kind of biological white charcoal that the present invention proposes comprises the following steps:

[0033] Step 1. Raw material pretreatment: Cut the biomass raw material into small pieces and perform cleaning pretreatment; then put the biomass raw material into the catalyst solution with a mass fraction of 5-15%, stir, soak and filter to obtain water and catalyst The biomass raw material; the catalyst solution is a mixed solution composed of manganese dioxide solution, ferric chloride solution, aluminum oxide solution, sodium carbonate solution and rare earth elements in any volume ratio;

[0034] Step 2, initial drying: the biomass raw material obtained in step 1 is placed in a dryer for initial drying, and the temperature of the dryer is controlled at 100-120°C so that the moisture content is lower than 15%;

[0035] Step 3, pulverization: put the biomass raw material that has been dried for the first time into a pulverizer for pulv...

Embodiment 1

[0047] The preparation technology of biological white charcoal provided by the present invention comprises the following steps:

[0048] Step 1. Raw material pretreatment: Cut the biomass raw material into small pieces and perform cleaning pretreatment; then put the biomass raw material into the catalyst solution with a mass fraction of 10%, stir, soak and filter to obtain the raw material containing water and catalyst. Material raw materials; the catalyst solution is a mixed solution composed of manganese dioxide solution, ferric chloride solution, aluminum oxide solution, sodium carbonate solution and rare earth elements in a volume ratio of 2:2:2:2:1;

[0049] Step 2, initial drying: the biomass raw material obtained in step 1 is placed in a dryer for initial drying, and the temperature of the dryer is controlled at 100°C so that the moisture content is lower than 15%;

[0050] Step 3, pulverization: Put the biomass raw material that has been dried for the first time into a...

Embodiment 2

[0058] A preparation process of biological white charcoal, comprising the following steps:

[0059] Step 1. Raw material pretreatment: cut the biomass raw material into small pieces and perform cleaning pretreatment; then put the biomass raw material into the catalyst solution with a mass fraction of 15%, stir, soak and filter to obtain the raw material containing water and catalyst. Material raw materials; catalyst solution is a mixed solution formed by mixing manganese dioxide solution, ferric chloride solution, aluminum oxide solution, sodium carbonate solution and rare earth elements in a volume ratio of 2:1:1:1:1;

[0060] Step 2, initial drying: the biomass raw material obtained in step 1 is placed in a dryer for initial drying, and the temperature of the dryer is controlled at 110°C so that the moisture content is lower than 15%;

[0061] Step 3, crushing: Put the biomass raw material that has been dried for the first time into a pulverizer for pulverization, the speed of...

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Abstract

The invention discloses a preparation technology of hard charcoal, and relates to the technical field of agricultural resources and environments. The preparation technology of the hard charcoal comprises the steps of impregnation of a biomass raw material in a catalyst solution and three-stage pyrolysis charring, the first-stage pyrolysis charring is realized by rising the temperature to a low temperature at a low heating rate and carrying out pre-charring, and the second-stage pyrolysis charring and the third-stage pyrolysis charring are realized by rising the temperature to a high temperature and carrying out charring, so the yield of the hard charcoal is increased, the specific surface area of the hard charcoal is increased, the aperture structure of the hard charcoal is improved, and the practical values of the hard charcoal are greatly improved; and surface oxidation and oxygen insulation cooling are carried out after the pyrolysis charring to oxidize the surface of the charcoal, and oxygen isolation cooling is carried out to reach room temperature in order to obtain the hard charcoal, so the surface of the hard charcoal is off-white, convenient cleaning during transportation and use is realized, and contamination of clothes and hands is avoided.

Description

technical field [0001] The invention belongs to the technical field of agricultural resources and environment, and in particular relates to a preparation process of biological white carbon. Background technique [0002] The waste produced in the process of agricultural and forestry processing worldwide is a huge number. In my country alone, the output of rice husks reached about 40 million tons in 2011, and the output of various crop straws exceeded 700 million tons per year. These crop straws, rice The handling of shells etc. is a problem. Pyrolysis is the conversion of biomass raw materials into other products for utilization through thermal decomposition. The implementation is relatively simple, the energy conversion rate is high, and it is also conducive to the large-scale processing of biomass raw materials. It is an effective solution to the above-mentioned agricultural and forestry waste biomass raw materials. One of the methods. [0003] Biochar is a kind of highly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10B57/08C10B57/10C10B57/06C10B57/00
CPCC10B53/02C10B57/005C10B57/06C10B57/08C10B57/10Y02E50/10
Inventor 张豫朱拥军石荣媛黄小玲
Owner 朱拥军
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