CN1724348A - Process for preparing active carbon using tea processing refuse as raw material - Google Patents
Process for preparing active carbon using tea processing refuse as raw material Download PDFInfo
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- CN1724348A CN1724348A CN 200510021238 CN200510021238A CN1724348A CN 1724348 A CN1724348 A CN 1724348A CN 200510021238 CN200510021238 CN 200510021238 CN 200510021238 A CN200510021238 A CN 200510021238A CN 1724348 A CN1724348 A CN 1724348A
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Abstract
A process for preparing activated carbon from tea leftover includes such steps as screening or shaping raw material, carbonizing, activating and post-treating. Its advantages are high de-coloring power, high pore volume, large specific surface area, and high purity.
Description
Technical field
The present invention relates to preparation method of active carbon, particularly relating to a kind of tankage with production tealeaves is the feedstock production process of active carbon.
Background technology
Gac is widely used in fields such as oil, medicine, chemical industry, food, national defense industry, safety precaution, environment protection.According to rough Statistics, national gac annual production reaches more than 250,000 tons, and the raw material of making gac is also varied, and wooden, ature of coal, shell etc. are arranged.Have four big advantages though the gac of wood material production is compared with the gac of other raw material production: total hole volume is big, specific surface area is big, and reactive behavior is big, and impurity is few, but to sacrifice the forest reserves and to destroy environment is that cost is produced gac, can not be fit to the needs of social sustainable development.
For protecting forest resources, improve environmental quality, country expressly provides, forbids the excessive and random lumbering forest, so the raw material of wood activated charcoal is day by day poor.For this reason, must seek the alternative materials of Activated Carbon Production, and at east China, middle part, southwest and south China wide geographic area, the Tea Production resource is all quite abundant, annual all with a large amount of tankage in the Tea Production, these offals are not owing to being used for tea making again, and are therefore many at present as fertilizer.Yet, we find by lot of experiments, the tankage of producing tealeaves but are the good raw materials of producing gac, and the gac of producing with it has the advantages that pore volume is big, specific surface area big, activity is high, impurity is few, and its quality is better than the absorption property of the gac of conventional wooden raw material production.If developed, not only can make high grade activated carbon, and have favorable economic benefit and social benefit.
Summary of the invention
The object of the present invention is to provide a kind of is the feedstock production process of active carbon by the tankage of producing tealeaves.It is the destruction of the forest reserves that caused of feedstock production gac that this method efficiently solves with wooden, and with the gac that this method is produced have that pore volume is big, specific surface area big, active high, impurity is few, absorption property is high characteristics.
The objective of the invention is that following technical scheme realizes by implementing.
With the Tea Processing tankage is the feedstock production process of active carbon, it is characterized in that comprising following processing step:
A, raw material screening or material forming: with raw material chopping, cross mesh sieve, remove choose behind the foreign material≤raw material of 0.5cm * lcm is as material; Perhaps the aforementioned material that filters out is dried to water content earlier less than 20%, standby after the molding device extrusion molding again;
Described molding device is selected extruser or hydraulic extrusion press for use.
B, charing: will place charring furnace through the material after steps A screening or the moulding, and under 200～600 ℃ temperature, destructive distillation per ton 2～4 hours reaches at 70～90% o'clock to the charing degree and gets carbonized material through extrusion molding;
Described pyrogenous optimum temperature range is 300～450 ℃.
The present invention also can increase by a step operation before carrying out step B, and be about to the material that obtains through steps A and carry out dip treating with the mixing solutions of phosphoric acid and hydrogen peroxide, material wherein per ton relatively, the amount of phosphoric acid is 50～100Kg, the amount of hydrogen peroxide is 3～20Kg.
C, activation: the carbonized material that step B makes is put into activation furnace, got activated material in 2～4 hours with superheated vapour activation per ton under 400～850 ℃ temperature;
The optimal activation temperature of described carbonized material is 400～600 ℃.
Described charring furnace or activation furnace are selected flattening oven, rotary kiln, continuous tunnel furnace, vertical heater, double stove or smoldering stove for use.
D, aftertreatment: the activated material that step C is made is through broken, washing, dry or in first pickling before the washing, promptly obtain gac again after washing and drying; the gained gac is classified sieve or milled processed after, further make indefinite form granulated active carbon and powdered carbon respectively.
The productive rate of described gac is 12.5～25%.
After testing, every technical parameter of the prepared gac of the present invention is as follows:
To 0.15 methylene blue decolorizing ability: 120ml/g～300ml/g
Caramel decolorizing ability 100～130%
Iodine number: 1000mg/g～1400mg/g
Specific surface area: 1000cm
2/ g～2000cm
2/ g
Total hole volume: 0.55cm
3/ g～1.25cm
3/ g
Total iron content :≤0.05%
Ash :≤3.5%
Intensity: 80～95%
pH： 4～9
The invention has the advantages that:
It is the destruction of the forest reserves that caused of feedstock production gac that the present invention efficiently solves with wooden, and not only have all advantages of wood activated charcoal with the gac that this method is made, and under equal processing condition, its decolorizing ability can improve more than 20%, also have the characteristics that pore volume is higher, specific surface area is bigger and foreign matter content is lower simultaneously, particularly importantly develop the new raw material of making high grade activated carbon, more reasonably utilized resource.
Embodiment
Embodiment 1
A kind of is the feedstock production process of active carbon with the Tea Processing tankage, it is characterized in that wrapping following processing step:
A, raw material screening: choose 10 tons of Tea Processing tankage, mesh sieve is crossed in chopping, filters out disintegrating slag, obtains≤9.5 tons of the materials of 0.5cm * 1cm.
B, charing: will screen good material and join in the vertical retort, reinforced at every turn 500Kg, per hour discharging once, discharging limit, limit is reinforced, and under 450 ℃ temperature dry distillation charring 20 hours, 2.95 tons of carbonized materials, the technical parameter that records is as follows:
Fugitive constituent 24.0%, ash 1.8%, moisture content 2.60%, fixed carbon 71.60%.
C, activation: 2.95 tons of carbonized materials that will make are put into rotary activated furnace, activate 14 hours with superheated vapour under 760 ℃ temperature and get activated material.
D, aftertreatment: with the activated material that makes through broken, wash, be drying to obtain gac 918Kg; The classified screening of prepared gac being obtained granularity is 8 * 30 purpose granulated active carbon 750Kg again, screen underflow 168Kg; Again the 168Kg screen underflow is ground after further washing, oven dry powdered carbon 158Kg.
After testing, the technical parameter of gained indefinite form granulated active carbon is as follows:
Iodine number 1148.5mg/g
To 0.15 methylene blue decolorizing ability 195ml/g
Specific surface area 1465cm
2/ g
Total hole volume 0.75cm
3/ g (pore volume 0.45cm wherein
3/ g)
Total iron content 0.04%
Ash 2.50%
Intensity 85%
PH value 9
The technical parameter of gained powdered carbon is as follows:
To 0.15 methylene blue decolorizing ability 210ml/g
Specific surface area 1530cm
2/ g
Total iron content 0.016%
Ash 2.10%
PH value 6
Embodiment 2
A kind of is the feedstock production process of active carbon with the Tea Processing tankage, it is characterized in that comprising following processing step:
A, raw material typing and dipping: raw material is shredded, cross mesh sieve, remove choose behind the disintegrating slag≤raw material of 0.5cm * 1cm is dried water content less than 20% simultaneously as material, get 1 ton of the material handled well, added 20Kg hydrogen peroxide and 80Kg phosphoric acid mixed solution dipping 12 hours.
B, charing: impregnated material is put in the flat charring furnace, and dry distillation charring got carbonized material in 60 minutes under 280～300 ℃ temperature.
C, activation: the carbonized material that makes is put into the two-row activation furnace, under 450 ℃ temperature, activate 3 hours with superheated vapour earlier and get activated material, again activated material is put into pond for recovering immediately, add the residual phosphoric acid in hot water dissolving's activated material, reclaim phosphoric acid, phosphoric acid not in the activated material in the pond.
D, aftertreatment: the activated material that will remove phosphoric acid moves into rinsing bath, with hot water rinsing 6 times, dries then, grinds, and gets powdered carbon 200Kg.
After testing, the technical parameter of gained powdered carbon is as follows:
To the blue decolorizing ability 270ml/g of 0.15 methyl
Total iron content 0.030%
Ash 3.20%
PH value 4.2.
Claims (6)
1, be the feedstock production process of active carbon with the Tea Processing tankage, it is characterized in that comprising that following processing step is as follows:
A, raw material screening or material forming: raw material chopping is sieved, remove choose behind the foreign material≤raw material of 0.5cm * 1cm is as material; Perhaps the aforementioned material that filters out is dried to water content earlier less than 20%, standby after the molding device extrusion molding again;
B, charing: will place charring furnace through the material after steps A screening or the moulding, and under 200～600 ℃ temperature, destructive distillation per ton 2～4 hours reaches at 70～90% o'clock to the charing degree and gets carbonized material through extrusion molding;
C, activation: the carbonized material that step B makes is put into activation furnace, got activated material in 2～4 hours with superheated vapour activation per ton under 400～850 ℃ temperature;
D, aftertreatment: the activated material that step C is made is through broken, washing, dry or in first pickling before the washing, promptly obtain gac again after washing and drying; the gained gac is classified sieve or milled processed after, further make indefinite form granulated active carbon and powdered carbon respectively.
2, the method for claim 1 is characterized in that described molding device selects extruser or hydraulic extrusion press for use.
3, the method for claim 1, it is characterized in that before carrying out step B, a step operation that increases is: the material that will obtain through steps A carries out dip treating with the mixing solutions of phosphoric acid and hydrogen peroxide, material wherein per ton relatively, the amount of phosphoric acid is 50～100Kg, and the amount of hydrogen peroxide is 3～20Kg.
4, the method for claim 1, the activation temperature that it is characterized in that described carbonized material is 400～600 ℃.
5, the method for claim 1 is characterized in that described charring furnace or activation furnace select flattening oven, rotary kiln, continuous tunnel furnace, vertical heater, double stove or smoldering stove for use.
6, the method for claim 1 is characterized in that described pyrogenous temperature range is 300～450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100212383A CN1301214C (en) | 2005-07-11 | 2005-07-11 | Process for preparing active carbon using tea processing refuse as raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100212383A CN1301214C (en) | 2005-07-11 | 2005-07-11 | Process for preparing active carbon using tea processing refuse as raw material |
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|---|---|
| CN1724348A true CN1724348A (en) | 2006-01-25 |
| CN1301214C CN1301214C (en) | 2007-02-21 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890334A (en) * | 2010-07-12 | 2010-11-24 | 苏晓文 | Preparation method of tea activated carbon |
| CN101992202B (en) * | 2009-08-17 | 2013-05-01 | 中国科学院过程工程研究所 | Method for treating biomass process residues |
| CN103265027A (en) * | 2013-05-24 | 2013-08-28 | 中国计量学院 | Dry distillation carbonization-momentary activation method for continuously producing active carbon by physical method |
| CN104312601A (en) * | 2014-09-28 | 2015-01-28 | 上海理工大学 | Preparation method of high-strength biomass carbonaceous fuel |
| CN106467296A (en) * | 2015-08-13 | 2017-03-01 | 明道学校财团法人明道大学 | Tea carbon and preparation method thereof |
| CN107286970A (en) * | 2016-04-01 | 2017-10-24 | 勐海茶业有限责任公司 | A kind of tea grounds smokeless char and preparation method thereof |
| CN107699262A (en) * | 2017-09-28 | 2018-02-16 | 周华民 | One plant tea charcoal and preparation method thereof |
| CN108439404A (en) * | 2018-06-25 | 2018-08-24 | 重庆工商大学 | A kind of method that beverage tea grounds activated carbon is prepared based on potassium carbonate method and products thereof and application |
| CN109052393A (en) * | 2018-10-22 | 2018-12-21 | 福建安溪东南活性炭有限公司 | A kind of preparation method of old tea tree active carbon |
| CN112758927A (en) * | 2020-12-22 | 2021-05-07 | 福建省农业科学院茶叶研究所 | Preparation method of tea stem-based activated carbon with high specific surface area |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034173A (en) * | 1988-01-12 | 1989-07-26 | 徐庭中 | Automatic speed regulating and labour saving arc type crank for bicycles |
-
2005
- 2005-07-11 CN CNB2005100212383A patent/CN1301214C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992202B (en) * | 2009-08-17 | 2013-05-01 | 中国科学院过程工程研究所 | Method for treating biomass process residues |
| CN101890334A (en) * | 2010-07-12 | 2010-11-24 | 苏晓文 | Preparation method of tea activated carbon |
| CN103265027A (en) * | 2013-05-24 | 2013-08-28 | 中国计量学院 | Dry distillation carbonization-momentary activation method for continuously producing active carbon by physical method |
| CN104312601A (en) * | 2014-09-28 | 2015-01-28 | 上海理工大学 | Preparation method of high-strength biomass carbonaceous fuel |
| CN106467296A (en) * | 2015-08-13 | 2017-03-01 | 明道学校财团法人明道大学 | Tea carbon and preparation method thereof |
| CN107286970A (en) * | 2016-04-01 | 2017-10-24 | 勐海茶业有限责任公司 | A kind of tea grounds smokeless char and preparation method thereof |
| CN107286970B (en) * | 2016-04-01 | 2021-08-03 | 勐海茶业有限责任公司 | Tea residue smokeless carbon and preparation method thereof |
| CN107699262A (en) * | 2017-09-28 | 2018-02-16 | 周华民 | One plant tea charcoal and preparation method thereof |
| CN108439404A (en) * | 2018-06-25 | 2018-08-24 | 重庆工商大学 | A kind of method that beverage tea grounds activated carbon is prepared based on potassium carbonate method and products thereof and application |
| CN109052393A (en) * | 2018-10-22 | 2018-12-21 | 福建安溪东南活性炭有限公司 | A kind of preparation method of old tea tree active carbon |
| CN109052393B (en) * | 2018-10-22 | 2022-08-30 | 福建安溪东南活性炭有限公司 | Preparation method of old tea tree activated carbon |
| CN112758927A (en) * | 2020-12-22 | 2021-05-07 | 福建省农业科学院茶叶研究所 | Preparation method of tea stem-based activated carbon with high specific surface area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301214C (en) | 2007-02-21 |
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