CN105130517A - Preparation method of novel biochar - Google Patents
Preparation method of novel biochar Download PDFInfo
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- CN105130517A CN105130517A CN201510403349.4A CN201510403349A CN105130517A CN 105130517 A CN105130517 A CN 105130517A CN 201510403349 A CN201510403349 A CN 201510403349A CN 105130517 A CN105130517 A CN 105130517A
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Abstract
The invention relates to a preparation method of novel biochar, which comprises following steps: (1) crushing plant straws into powder, soaking the plant straws and soaking the plant straws in an ammonium acetate water solution at normal temperature, and cooking the plant straws in a mixed liquid prepared from oxalic acid, sodium nitrate, tannin acid and water; (2) washing filter residue in clear water to remove acid on surface of the plant straw powder; (3) cooking the filtrate; (4) mixing a solid substance obtained in the step (3) with carbon powder according to the weight ratio of 100:2.5 uniformly and performing high-temperature treatment; (5) mixing the treated raw materials with activated charcoal according to the weight ratio of 60:2 uniformly, and performing carbonization treatment with nitrogen gas filled into a quartz tube continuously so that the nitrogen gas is circulated in the quartz tube to prepare the biochar. The method for producing the biochar can reach more than 64.5% in carbonization rate of the plant straws, and is reduced by about 10% in energy consumption during the process.
Description
Technical field
The invention belongs to material processing field, be specifically related to a kind of preparation method of new bio carbon.
Background technology
Recently, sight is turned to biological carbon by scientist, has sprouted the conception of creation " technology soil ", ites is desirable to, by improving the intrinsic carbon reserves of soil, to solve current climate change, the energy and Food and water crisis of resource.
In recent years, along with Global climate change, greenhouse gas emission, arable soil is degenerated, the environment of human survival and space are increasingly severe, but the measure taked at present is headache doctor head pin pain doctor pin mostly, and the self-recovery circulation of natural ecosystems still " is got stuck ".
Biological carbon not only can significantly be increase soil fertility, and dead soil is cultivated fertile high-carbon storehouse soil, and the most direct effect significantly improves crop yield and quality exactly, indirectly can also reduce the amount of application of the chemical such as chemical fertilizer, agricultural chemicals.Most critical be carbon effectively absorption solidification in the middle of biological carbon, decrease the discharge of greenhouse gases, and the dependence to petroleum product.Known one ton of biomass can fix 0.726 ton of carbonic acid gas at present.
China's grain realizes good harvest in continuous 9 years, and this is then the good harvest of stalk behind.According to the statistics of National Development and Reform Committee, current China agricultural crop straw can be about 700,000,000 tons by collecting amount.Every harvest season, pile up like a mountain for crop material.
If by these stalks, edible fungi residues also field, the effective measure increase soil input beyond doubt, containing Soil degradation, improve farmland quality.But, due to land policy that China is existing productive unit is split too small, be unfavorable for the use of straw-returning machinery.Totally different weather condition also make the straw-returning scope of application be restricted, and cause current China crop-residue incorporation to be less than 1/3, burnt or discarded amount but more than 50%.A large amount of greenhouse gases of crop straw burning discharge and flue dust, cause Air quality to decline, bring out city haze, affect flight and play degradation series of environmental problems.
But biological carbon adds man-hour now, and carbonation rate is not high, and often below 40%, meanwhile, the carbonization temperature of prior art is higher, and energy waste is larger.
Summary of the invention
The object of this invention is to provide a kind of working method of new bio carbon, by the improvement to technique, the temperature of carbonizing treatment can be reduced.
The present invention is achieved through the following technical solutions:
A preparation method for new bio carbon, comprises the following steps:
(1), get straw and be broken into powder, then the ammonium acetate aqueous solution of functional quality mark 4.5% soaks 25-40min at normal temperatures, pressure removes the moisture in plant straw powder, then use formic acid, SODIUMNITRATE, Weibull, water by weight the mixed solution boiling of 6:0.5:2:3 proportions, boiling temperature is 118-125 DEG C, cooking time is 25-40min, filters, obtains filtrate and filter residue;
(2), by filter residue use clear water to wash, wash away the floating acid on stalk powder surface;
(3), by filtrate carry out boiling, remove acid solution and the moisture of the inside, solid residue boiling obtained uses clear water washing, again carries out boiling, is merged by the filter residue that the solids obtained and step (2) obtain, and dries;
(4) solids, step (3) obtained mixes by weight 100:2.5 with carbon dust, use silica tube to carry out pyroprocessing under nitrogen protection at 320-360 DEG C, the treatment time is 10-15min, in temperature-rise period, after temperature rises to 280 DEG C, increasing extent of temperature is 3 DEG C/min;
(5), by the above-mentioned raw material handled well mix with the ratio of gac by weight 60:2, continue to be warming up to 380-420 DEG C and carry out carbonizing treatment, and constantly in silica tube, blast nitrogen, make nitrogen at silica tube internal recycle, make biological carbon.
In step (5), after carbonizing treatment 3-5min, use extrusion machine to extrude raw material, pressure is 2-3.5MPa, and raw material is pressed into bulk.
After step (4) has processed, functional quality mark has been the KMnO of 0.5%
4solution is by raw material soaking and use ultrasonic oscillation 15min, and then the liquor kalii acetici of functional quality mark 2% soaks 20min, dries under nitrogen protection.
A kind of biological carbon using aforesaid method to produce.
Straw during this law is bright is that one or more in branch, soybean stalk, maize straw, wheat stalk, straw mix with arbitrary proportion.
Beneficial effect of the present invention: the present invention is by before carbonizing treatment, straw is processed, Mierocrystalline cellulose is made to carry out separation activation, space between vegetable fibre is increased, mix again after oligomeric carbohydrate in straw being separated simultaneously, the efficiency of carbonization can be promoted, reduce carbonization temperature, can also promote the voidage of biological carbon, the length in space is longer; In carbonization process, in silica tube, blast nitrogen, can recycle heat be made, and straw is heated evenly, heat utilization ratio is higher.When heating and carbonizing treatment, add a small amount of carbon dust, straw-carbonized speed can be promoted, be conducive to the dispersed of more composition, use the carbonation rate of method production biological carbon straw of the present invention to reach more than 66%, use method of the present invention can reduce energy consumption about 12% in the course of processing simultaneously.
Method of the present invention is used to carry out the biological carbon of extrusion production for bulk, extrude after carbonizing treatment carries out several minutes, both the speed of carbonization can not have been slowed down, biological carbon stability after can making extruding is again higher after making relative to biological carbon, not loose, and through the biological carbon of this method process, there is very high absorption property.
After using potassium permanganate and Potassium ethanoate to process in preparation process, the biological carbon made can be made to have the adsorptivity of high heavy metal lead, more than 98.5% is reached to the lead in air or the Plumbum absorption rate in water, stronger relative to existing activated carbon adsorptive capacity, especially the specific absorption of heavy metal lead is had and significantly promote.
Embodiment
Embodiment 1
A preparation method for new bio carbon, comprises the following steps:
(1), get straw and be broken into powder, then the ammonium acetate aqueous solution of functional quality mark 4.5% soaks 25-40min at normal temperatures, pressure removes the moisture in plant straw powder, then use formic acid, SODIUMNITRATE, Weibull, water by weight the mixed solution boiling of 6:0.5:2:3 proportions, boiling temperature is 118-125 DEG C, cooking time is 25-40min, filters, obtains filtrate and filter residue;
(2), by filter residue use clear water to wash, wash away the floating acid on stalk powder surface;
(3), by filtrate carry out boiling, remove acid solution and the moisture of the inside, solid residue boiling obtained uses clear water washing, again carries out boiling, is merged by the filter residue that the solids obtained and step (2) obtain, and dries;
(4) solids, step (3) obtained mixes by weight 100:2.5 with carbon dust, use silica tube to carry out pyroprocessing under nitrogen protection at 320-360 DEG C, the treatment time is 10-15min, in temperature-rise period, after temperature rises to 280 DEG C, increasing extent of temperature is 3 DEG C/min;
(5), by the above-mentioned raw material handled well mix with the ratio of gac by weight 60:2, continue to be warming up to 380-420 DEG C and carry out carbonizing treatment, and constantly in silica tube, blast nitrogen, make nitrogen at silica tube internal recycle, make biological carbon.
Embodiment 2
In step (5), after carbonizing treatment 3-5min, use extrusion machine to extrude raw material, pressure is 3MPa, and raw material is pressed into bulk.Other steps are with embodiment 1.
Embodiment 3
After step (4) has processed, functional quality mark has been the KMnO of 0.5%
4solution is by raw material soaking and use ultrasonic oscillation 15min, and then the liquor kalii acetici of functional quality mark 2% soaks 20min, dries under nitrogen protection.Other steps are with embodiment 1.
Embodiment 4
After step (4) has processed, functional quality mark has been the KMnO of 0.5%
4solution is by raw material soaking and use ultrasonic oscillation 15min, and then the liquor kalii acetici of functional quality mark 2% soaks 20min, dries under nitrogen protection.
In step (5), after carbonizing treatment 3-5min, use extrusion machine to extrude raw material, pressure is 3MPa, and raw material is pressed into bulk.Other steps are with embodiment 1.
A kind of biological carbon using aforesaid method to produce.
Table 1 is for using the biological carbon prepared of each embodiment method to the specific absorption of pollutent:
Table 1
As shown in Table 1, the adsorptive power of biological carbon prepared by the inventive method has obvious lifting relative to existing gac, especially obviously promotes the specific absorption of lead.
Claims (4)
1. a preparation method for new bio carbon, is characterized in that, comprises the following steps:
(1), get straw and be broken into powder, then the ammonium acetate aqueous solution of functional quality mark 4.5% soaks 25-40min at normal temperatures, pressure removes the moisture in plant straw powder, then use formic acid, SODIUMNITRATE, Weibull, water by weight the mixed solution boiling of 6:0.5:2:3 proportions, boiling temperature is 118-125 DEG C, cooking time is 25-40min, filters, obtains filtrate and filter residue;
(2), by filter residue use clear water to wash, wash away the floating acid on stalk powder surface;
(3), by filtrate carry out boiling, remove acid solution and the moisture of the inside, solid residue boiling obtained uses clear water washing, again carries out boiling, is merged by the filter residue that the solids obtained and step (2) obtain, and dries;
(4) solids, step (3) obtained mixes by weight 100:2.5 with carbon dust, use silica tube to carry out pyroprocessing under nitrogen protection at 320-360 DEG C, the treatment time is 10-15min, in temperature-rise period, after temperature rises to 280 DEG C, increasing extent of temperature is 3 DEG C/min;
(5), by the above-mentioned raw material handled well mix with the ratio of gac by weight 60:2, continue to be warming up to 380-420 DEG C and carry out carbonizing treatment, and constantly in silica tube, blast nitrogen, make nitrogen at silica tube internal recycle, make biological carbon.
2. the preparation method of a kind of new bio carbon according to claim 1, is characterized in that: in step (5), after carbonizing treatment 3-5min, and use extrusion machine to extrude raw material, pressure is 2-3.5MPa, and raw material is pressed into bulk.
3. the preparation method of a kind of new bio carbon according to claim 1 and 2, it is characterized in that: after step (4) has processed, functional quality mark is the KMnO of 0.5%
4solution is by raw material soaking and use ultrasonic oscillation 15min, and then the liquor kalii acetici of functional quality mark 2% soaks 20min, dries under nitrogen protection.
4. the biological carbon using one of claim 1-3 method to produce.
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| CN105801283A (en) * | 2016-05-17 | 2016-07-27 | 阜阳大丰收农业种植专业合作社 | Environment-friendly organic biomass fertilizer special for oil peonies |
| CN105819977A (en) * | 2016-05-16 | 2016-08-03 | 阜阳市颍泉区下湾种植专业合作社 | Biomass organic fertilizer for high-rise green plants |
| CN105837381A (en) * | 2016-05-17 | 2016-08-10 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for soil improvement |
| CN105837382A (en) * | 2016-05-17 | 2016-08-10 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for supplementing rice with calcium |
| CN105924322A (en) * | 2016-05-17 | 2016-09-07 | 安徽昊利肥业有限公司 | Biomass organic potash fertilizer |
| CN105936611A (en) * | 2016-06-28 | 2016-09-14 | 温振海 | Biomass organic fertilizer for planting melons and fruits |
| CN105967875A (en) * | 2016-05-17 | 2016-09-28 | 阜阳大丰收农业种植专业合作社 | Biomass organic insecticide fertilizer for oily peonies |
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| CN105967783A (en) * | 2016-05-17 | 2016-09-28 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for improving soil aggregates |
| CN106008097A (en) * | 2016-05-24 | 2016-10-12 | 安徽省康隆农业科技有限公司 | Biomass organic fertilizer for Hangzhou white chrysanthemum planting |
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| CN106007831A (en) * | 2016-05-17 | 2016-10-12 | 安徽昊利肥业有限公司 | Biomass organic synergistic fertilizer |
| CN106008070A (en) * | 2016-05-16 | 2016-10-12 | 阜阳市颍泉区下湾种植专业合作社 | Biomass organic fertilizer for ornamental nursery stocks |
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| CN103566883A (en) * | 2013-10-17 | 2014-02-12 | 复旦大学 | Preparation method of hydrothermal liquefied biochar-based porous carbon and magnetic carbon material and applications of porous carbon and magnetic carbon material |
| CN103990433A (en) * | 2014-04-25 | 2014-08-20 | 重庆文理学院 | Macadamia nut shell/sorghum straw bio-char and preparation method thereof |
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| CN106008070A (en) * | 2016-05-16 | 2016-10-12 | 阜阳市颍泉区下湾种植专业合作社 | Biomass organic fertilizer for ornamental nursery stocks |
| CN105819977A (en) * | 2016-05-16 | 2016-08-03 | 阜阳市颍泉区下湾种植专业合作社 | Biomass organic fertilizer for high-rise green plants |
| CN105967875A (en) * | 2016-05-17 | 2016-09-28 | 阜阳大丰收农业种植专业合作社 | Biomass organic insecticide fertilizer for oily peonies |
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| CN105924322A (en) * | 2016-05-17 | 2016-09-07 | 安徽昊利肥业有限公司 | Biomass organic potash fertilizer |
| CN105801283A (en) * | 2016-05-17 | 2016-07-27 | 阜阳大丰收农业种植专业合作社 | Environment-friendly organic biomass fertilizer special for oil peonies |
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| CN105967784A (en) * | 2016-05-17 | 2016-09-28 | 阜阳大丰收农业种植专业合作社 | Biomass organic fertilizer for improved planting of oily peonies in cold waterlogged paddy field |
| CN105967783A (en) * | 2016-05-17 | 2016-09-28 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for improving soil aggregates |
| CN106008074A (en) * | 2016-05-17 | 2016-10-12 | 安徽昊利肥业有限公司 | Alcohol waste mash biomass organic fertilizer |
| CN106007917A (en) * | 2016-05-17 | 2016-10-12 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for dry farmland soil |
| CN106007831A (en) * | 2016-05-17 | 2016-10-12 | 安徽昊利肥业有限公司 | Biomass organic synergistic fertilizer |
| CN105837381A (en) * | 2016-05-17 | 2016-08-10 | 安徽昊利肥业有限公司 | Biomass organic fertilizer for soil improvement |
| CN106008097A (en) * | 2016-05-24 | 2016-10-12 | 安徽省康隆农业科技有限公司 | Biomass organic fertilizer for Hangzhou white chrysanthemum planting |
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| CN105936611A (en) * | 2016-06-28 | 2016-09-14 | 温振海 | Biomass organic fertilizer for planting melons and fruits |
| CN106116869A (en) * | 2016-06-28 | 2016-11-16 | 温振海 | A kind of revegetation biomass organic fertilizer |
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Application publication date: 20151209 |