CN103588200B - Production method of xyloid coal-based shaped active carbon - Google Patents
Production method of xyloid coal-based shaped active carbon Download PDFInfo
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- CN103588200B CN103588200B CN201310543355.0A CN201310543355A CN103588200B CN 103588200 B CN103588200 B CN 103588200B CN 201310543355 A CN201310543355 A CN 201310543355A CN 103588200 B CN103588200 B CN 103588200B
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Abstract
The invention discloses a production method of xyloid coal-based shaped active carbon. The production method comprises the following steps: (1) wood chips and coal powder are mixed according to a ratio, are then taken out after being dipped in phosphoric acid solution, and are plastified in an oil bath pan; the plastifying is completed until the color of the mixture is changed from brown to black and greater viscosity is generated; a plastified product is obtained; (2) the plastified product is quickly transferred onto a mold for forming on a hydropress; a carbon precursor formed object obtained through pressing is put in a drying box for slow drying and hardening at a constant temperature; (3) the formed carbon precursor is carbonized and activated in an activating furnace to prepare the xyloid coal-based shaped active carbon. The production method has the advantages of overcoming the defects such as pollution, high cost, difficulty in transport and preservation, poor stability, poor compatibility and complex technique due to the addition of adhesive in the traditional technique, using the wood chips to take an effect similar to that of the adhesive, and using part wood chips to replace coal powder to reduce the consumption of coal powder resource.
Description
Technical field
What the present invention relates to is the production method of the base molded gac of a kind of xyloid coal, belongs to novel absorbent charcoal compound preparing technical field.
Background technology
Gac is a kind of important materials relating to military affairs, civilian and industrial various fields, and active carbon from coal is the activated carbon product that output is maximum both at home and abroad at present.Preparation technology's flow process of coal-based pressed active carbon, generally: feed coal first broken abrasive dust mixes with cakingagent again, is undertaken shaping, molding mass carbonizes again, activates by molding device.Conventional cakingagent is: coal tar, coal-tar pitch and petroleum pitch.The use of these sizing agents adds production cost on the one hand, and there are some problems.As coal tar pollute large, cost is high, insulation operation, transport and keeping difficulty; Coal-tar pitch poor stability, poisonous frowziness; Petroleum pitch and coal facies capacitive not good.There is sizing agent use cost problem in these preparation methods.
Summary of the invention
What the present invention proposed is the production method of the base molded gac of a kind of xyloid coal, its object is intended to not add sizing agent, sizing agent effect is played with biomass wood chip, prepare the base molded gac of xyloid coal under reducing the condition of coal consumption, the problems such as the sizing agent use cost existed in solution traditional preparation methods, the coal energy are non-renewable simultaneously.
Technical solution of the present invention: the method for the base molded gac of a kind of xyloid coal, is characterized in that: the method comprises following processing step:
(1) wood chip and coal dust are mixed in proportion, take out after dipping in the phosphoric acid solution of mass concentration 30% ~ 50%, put into oil bath pan, be plasticized to mixture color at 150 ~ 190 DEG C and become black by brown, and produce viscosity when being about the viscosity of 1.5Pas, terminate plasticizing, obtain plastifying product;
(2) the plasticizing product obtained is quickly transferred on mould, at hydropress 30MPa forming under the pressure, the carbonaceous forerunner forming composition that compacting obtains is placed in loft drier (temperature 80 ~ 100 DEG C) and carries out slow freeze-day with constant temperature about 1h, sclerosis;
(3) the shaping carbonaceous presoma will prepared, carry out carbonizing (carbonization temperature 300 ~ 500 DEG C in activation furnace, carbonization time 1 ~ 2h) and activation (activation temperature 400 ~ 600 DEG C, soak time 1 ~ 3 h), the obtained base molded gac of xyloid coal, gac diameter 3mm, length 10-20mm, intensity is 80% ~ 90% is not volume unit.[explaining: the measuring method with reference to intensity in GB " GB/T12496.6 wood activated charcoal test method "]
Advantage of the present invention: preparation technology's flow process of traditional coal-based pressed active carbon, add the problems such as sizing agent existence pollution is large, cost is high, be incubated operation, transport and take care of difficulty, poor stability, poisonous frowziness, consistency are not good, and add complex process degree and production cost.Coal dust is Nonrenewable energy resources, and wood chip belongs to renewable energy source, replaces coal dust with part wood chip, reduces coal dust consumed resource, viewed from energy angle, has realistic meaning.The present invention efficiently solves sizing agent and uses problem, and reduces coal consumption.
Accompanying drawing explanation
Accompanying drawing 1 is process flow sheet of the present invention.
Embodiment
As shown in drawings, the method for the base molded gac of a kind of xyloid coal, comprises following processing step:
(1) wood chip and coal dust are mixed in proportion, take out after dipping in the phosphoric acid solution of mass concentration 30% ~ 50%, put into oil bath pan, be plasticized to mixture color at 150 ~ 190 DEG C and become black by brown, and produce viscosity when being about the viscosity of 1.5Pas, terminate plasticizing, obtain plastifying product;
(2) the plasticizing product obtained is quickly transferred on mould, at hydropress 30MPa forming under the pressure, the carbonaceous forerunner forming composition that compacting obtains is placed in loft drier (temperature 80 ~ 100 DEG C) and carries out slow freeze-day with constant temperature about 1h, sclerosis;
(3) the shaping carbonaceous presoma will prepared, carry out carbonizing (carbonization temperature 300 ~ 500 DEG C in activation furnace, carbonization time 1 ~ 2h) and activation (activation temperature 400 ~ 600 DEG C, soak time 1 ~ 3 h), the obtained base molded gac of xyloid coal, gac diameter 3mm, length 10 ~ 20mm, intensity is 80% ~ 90%, 80% ~ 90% is not volume unit.[explaining: the measuring method with reference to intensity in GB " GB/T12496.6 wood activated charcoal test method "]
Described sizing agent is the gluing effect utilizing biomass wood chip to play, and reduces coal consumption simultaneously and does not add sizing agent, do not add sizing agent.
The processing parameter of the shaping carbonaceous presoma of described preparation is: mass concentration is the phosphate impregnation of 30% ~ 50%, dipping temperature is 50 ~ 70 DEG C, and plasticization temperature is 150 ~ 190 DEG C, and the mass ratio of wood chip and coal dust is 1:1 ~ 1:4, the mass ratio of wood chip and phosphoric acid is 1:1 ~ 1:4, forming pressure 30MPa.
The processing parameter that described wood activated charcoal and active carbon from coal combine is: the mass ratio of impregnating ratio and phosphoric acid and shaping carbonaceous presoma is 0:1 ~ 2:1, activation temperature 400 ~ 600 DEG C, soak time 1 h ~ 3 h.
Embodiment 1
Wood dust is broken to 30 orders, coal dust 200 order, in mass ratio after 1:4 mixing in 30% phosphoric acid solution dipping completely after, take out and in oil bath pan, be plasticized to mixture color at 180 DEG C become black by brown, and when producing larger viscosity, terminate plasticizing, obtain plastifying product.The plasticizing product obtained is quickly transferred on mould, shaping on a hydraulic press.In loft drier, carry out slow freeze-day with constant temperature, sclerosis by suppressing the carbonaceous forerunner forming composition obtained, recording shaping carbonaceous presoma intensity is 93%.Shaping carbonaceous presoma to send in tube furnace carbonization-activation under activation temperature 550 DEG C, soak time 2.5 h again, and be prepared into the base molded gac of xyloid coal, diameter 3mm, length 10-20mm, intensity is 88%, methylene blue adsorption value 210mgg
-1, iodine sorption value 865mgg
-1.
The performance index of the base molded gac of xyloid coal are suitably adjusted according to concrete moulding process and activating process parameter.
Embodiment 2
Wood dust is broken to 40 orders, coal dust 200 order, in mass ratio after 1:3 mixing in 40% phosphoric acid solution dipping completely after, take out and in oil bath pan, be plasticized to mixture color at 190 DEG C become black by brown, and when producing larger viscosity, terminate plasticizing, obtain plastifying product.The plasticizing product obtained is quickly transferred on mould, shaping on a hydraulic press.In loft drier, carry out slow freeze-day with constant temperature, sclerosis by suppressing the carbonaceous forerunner forming composition obtained, recording shaping carbonaceous presoma intensity is 91%.Shaping carbonaceous presoma to send in tube furnace carbonization-activation under activation temperature 500 DEG C, soak time 1.5 h again, and be prepared into the base molded gac of xyloid coal, diameter 3mm, length 10-20mm, intensity is 87%, methylene blue adsorption value 195mgg
-1, iodine sorption value 825mgg
-1.
The performance index of the base molded gac of xyloid coal are suitably adjusted according to concrete moulding process and activating process parameter.
Embodiment 3
Wood dust is broken to 40 orders, coal dust 200 order, in mass ratio after 1:2 mixing in 50% phosphoric acid solution dipping completely after, take out and in oil bath pan, be plasticized to mixture color at 170 DEG C become black by brown, and when producing larger viscosity, terminate plasticizing, obtain plastifying product.The plasticizing product obtained is quickly transferred on mould, shaping on a hydraulic press.In loft drier, carry out slow freeze-day with constant temperature, sclerosis by suppressing the carbonaceous forerunner forming composition obtained, recording shaping carbonaceous presoma intensity is 93%.Shaping carbonaceous presoma to send in tube furnace carbonization-activation under activation temperature 600 DEG C, soak time 2 h again, and be prepared into the base molded gac of xyloid coal, diameter 3mm, length 10-20mm, intensity is 84%, methylene blue adsorption value 165mgg
-1, iodine sorption value 795mgg
-1.
The performance index of the base molded gac of xyloid coal are suitably adjusted according to concrete moulding process and activating process parameter.
Claims (1)
1. the method for the base molded gac of xyloid coal, it is characterized in that: wood dust is broken to 30 orders, coal dust 200 order, flood in 30% phosphoric acid solution after 1:4 mixing in mass ratio completely, take out and in oil bath pan, be plasticized to mixture color at 180 DEG C become black by brown, and when producing larger viscosity, terminate plasticizing, obtain plastifying product; The plasticizing product obtained is quickly transferred on mould, shaping on a hydraulic press; In loft drier, carry out slow freeze-day with constant temperature, sclerosis by suppressing the carbonaceous forerunner forming composition obtained, recording shaping carbonaceous presoma intensity is 93%; Shaping carbonaceous presoma to send in tube furnace carbonization-activation under activation temperature 550 DEG C, soak time 2.5 h again, and be prepared into the base molded gac of xyloid coal, diameter 3mm, length 10-20mm, intensity is 88%, methylene blue adsorption value 210mgg
-1, iodine sorption value 865mgg
-1.
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| CN201310543355.0A CN103588200B (en) | 2013-11-06 | 2013-11-06 | Production method of xyloid coal-based shaped active carbon |
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| CN103588200B true CN103588200B (en) | 2015-06-17 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101516497A (en) * | 2006-08-23 | 2009-08-26 | 碳解决方案公司 | Acid-impregnated activated carbon and methods of forming and using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101516497A (en) * | 2006-08-23 | 2009-08-26 | 碳解决方案公司 | Acid-impregnated activated carbon and methods of forming and using the same |
Non-Patent Citations (1)
| Title |
|---|
| 楼旭春.化学法制备木质成型活性炭的研究.《中国优秀硕士学位论文全文数据库(工程科技I辑)》.2012,(第11期),第20-29页. * |
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Application publication date: 20140219 Assignee: Jiangsu PureStar Environmental Science & Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2019320000039 Denomination of invention: Production method of xyloid coal-based shaped active carbon Granted publication date: 20150617 License type: Common License Record date: 20190319 |
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Application publication date: 20140219 Assignee: Chengde Hua Hua Activated Carbon Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: 2019320000084 Denomination of invention: Production method of xyloid coal-based shaped active carbon Granted publication date: 20150617 License type: Common License Record date: 20190327 |