Carbonization processing method of corn stalk

A technology of corn stalks and a processing method is applied in the industrial field of sustainable development and utilization of agricultural resources and environment, which can solve the problems of uneven distribution of biochar pore structure, low resource utilization value, low yield and the like, and achieves improved gasification reaction and efficiency. The effect of micropore formation rate, energy saving and high efficiency

Inactive Publication Date: 2018-11-06
FUNAN SHENGTIAN NEW ENERGY DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Corn stalks are a kind of biological straw with a large yield. The existing biochar preparation using corn stalks as raw materials for carbonization processing has a low yield, low resource utilization value, and uneven distribution of void structures in the processed biochar. When processing biochar, it is necessary to study the relationship between its biological characteristics and pyrolysis temperature in order to save energy and produce better products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A carbonization processing method for corn stalks, comprising the following steps:

[0018] (1) Clean the harvested corn stalks from sludge and impurities, soak them in a sodium sulfite solution with a mass concentration of 0.7% for 2 hours, then take them out and drain the water, dry them at 110°C for 4 hours, cool them down to 30°C, and crush them into granules The diameter is between 1-2mm;

[0019] (2) Put the pulverized material into the carbonization furnace, raise the temperature to 380°C at a rate of 8°C / min, keep warm and carbonize for 1.5 hours, then continue to heat up to 550°C at a rate of 6°C / min, keep warm and carbonize for 30 minutes, Finally, the temperature was lowered to 400°C at a rate of 10°C / min, kept warm and carbonized for 20 minutes, and taken out after natural cooling in the furnace to obtain carbonized materials;

[0020] (3) Put the carbonized material into the tube furnace, feed nitrogen, raise the temperature to 210°C, activate for 5 hours,...

Embodiment 2

[0026] A carbonization processing method for corn stalks, comprising the following steps:

[0027] (1) Clean the harvested corn stalks from sludge and impurities, soak them in a sodium sulfite solution with a mass concentration of 0.8% for 2.5 hours, then take out and drain the water, dry them at 112°C for 4.5 hours, cool down to 33°C, and crush them into grains The diameter is between 1-2mm;

[0028] (2) Put the pulverized material into the carbonization furnace, raise the temperature to 390°C at a rate of 8.5°C / min, keep warm and carbonize for 1.8 hours, then continue to heat up to 580°C at a rate of 6.5°C / min, keep warm for 35 minutes, Finally, the temperature was lowered to 410°C at a rate of 11°C / min, kept warm and carbonized for 25 minutes, and taken out after natural cooling in the furnace to obtain carbonized materials;

[0029] (3) Put the carbonized material into the tube furnace, feed nitrogen, raise the temperature to 220°C, activate for 6 hours, stop heating and ...

Embodiment 3

[0035] A carbonization processing method for corn stalks, comprising the following steps:

[0036] (1) Remove the sludge and impurities from the harvested corn stalks, soak them in a sodium sulfite solution with a mass concentration of 0.9% for 3 hours, then take out and drain the water, dry them at 115°C for 5 hours, cool down to 35°C, and crush them into granules The diameter is between 1-2mm;

[0037] (2) Put the pulverized material into the carbonization furnace, raise the temperature to 400°C at a rate of 9°C / min, keep warm and carbonize for 2.0 hours, then continue to heat up to 600°C at a rate of 7°C / min, keep warm and carbonize for 40 minutes, Finally, the temperature was lowered to 420°C at a rate of 12°C / min, kept warm for 30 minutes, and then taken out after natural cooling in the furnace to obtain carbonized materials;

[0038] (3) Put the carbonized material into the tube furnace, feed nitrogen, raise the temperature to 230°C, activate for 7 hours, stop heating a...

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Abstract

The invention belongs to the field of agricultural resource environment sustainable development utilization industry, and discloses a carbonization processing method of corn stalk. The carbonization processing method comprises following steps: corn stalk is subjected to pretreatment to increase stalk strength and reduce ash content, gradient charing heating is adopted, so that charing effect is improved, and energy is saved; and at last, activation treatment is carried out, so that gasification reaction and micropore formation rates are increased, the prepared biomass charcoal possesses excellent density and pore structures, the specific surface area is as large as 1200m<2> / g, the adsorption capacity is high, the adsorption amount at room temperature is 140mg / g. The carbonization processing method is capable of improving comprehensive performance of processing of corn stalk into biomass charcoal such as the yield; operation is simple; efficiency is high; operation is convenient, safe,and reliable; energy is saved; and the carbonization processing method is worthy of popularization.

Description

technical field [0001] The invention belongs to the industrial technical field of sustainable development and utilization of agricultural resources and environment, and in particular relates to a carbonization processing method of corn stalks. Background technique [0002] Agricultural resources are the general term for agricultural natural resources and agricultural economic resources. Agricultural natural resources include natural environmental elements that can be used in agricultural production, such as land resources, water resources, climate resources, and biological resources. Chinese farmers have a long history of using crop stalks, but due to the low level of agricultural production and low output in the past, the amount of stalks was small. Except for a small amount of straw used for gaskets, feeding livestock, and some used for composting, most of the straw was used as fuel. Lost. With the development of agricultural production, since the 1980s, China's grain ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10L5/44
CPCC10B53/02C10L5/447Y02E50/10Y02E50/30
Inventor 孟凡辉
Owner FUNAN SHENGTIAN NEW ENERGY DEV CO LTD
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