CN1030065C - Method and equipment for producing active carbon by phosphoric acid method - Google Patents
Method and equipment for producing active carbon by phosphoric acid method Download PDFInfo
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- CN1030065C CN1030065C CN 88102426 CN88102426A CN1030065C CN 1030065 C CN1030065 C CN 1030065C CN 88102426 CN88102426 CN 88102426 CN 88102426 A CN88102426 A CN 88102426A CN 1030065 C CN1030065 C CN 1030065C
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- phosphoric acid
- active carbon
- producing active
- activation
- acid
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Abstract
The present invention relates to a method and equipment for producing active carbon by a phosphoric acid method. The method provides the optimum impregnating ratio of phosphoric acid to carbonaceous raw material and the optimal activation temperature. The rinsing recovery process adopts a mixing intermittent type so as to effectively recover and recycle diluent phosphoric acid. The whole process does not have three-waste discharges basically. A carbonization and activation furnace is made from acid-proof and refractory materials instead of expensive acid-proof metal materials. Moreover, a combustion chamber adopts an underfeed type reverse combustion apparatus, and accordingly, the thermal efficiency is high.
Description
The invention relates to phosphoric acid is activator, prepares process of active carbon with containing carbonaceous raw material, and the carbonization-activation stove that is applicable to this method.But gac with this method production various uses.
The chemical agent activation method is produced gac, and present most popular activator is a zinc chloride.This method advantage is that production technique is simple, easy to operate; The raw material availability height; The product decolorizing ability is strong, is fit to the absorption of liquid phase macromole.But there is also critical defect, as: volatilize zinc chloride and hydrogenchloride in the production process, bring the severe contamination of environment; Simultaneously zinc chloride reclaims difficulty, and the rate of recovery is low, causes that the zinc consumption is high, energy consumption is high, cost is high.And use phosphoric acid to replace zinc chloride to make activator, can overcome above-mentioned shortcoming, but have the other serious problems, and therefore affect its applying of commercial scale production.One, phosphoric acid is than zinc chloride price height, and loss is a bit bigger to the production cost influence; Two, the corrodibility to equipment is big, also do not have the ideal material of ability high temperature phosphorous acid corrosion now, and the acid resistant metal material price is often all very expensive.Japan's " special permission communique " clear 50-33979 number, about once proposing in wood chip gac phosphoric acid activation method one literary composition, with cellulose-based film, plate or meal every between iron plate and phosphate impregnation wood chip, carrying out phosphoric acid method Activated Carbon Production, thereby alleviate the corrosion of phosphoric acid to activation furnace equipment.Yet this method fails fundamentally to solve the acid resisting material problem of activation furnace.
The objective of the invention is to propose a kind of is activator with phosphoric acid, prepares process of active carbon with containing carbonaceous raw material, and is best suited for easy, economic carbonization-activation stove this method, that have the construction of tolerate P-levels acid corrosion material.Use this method production gac and not only can avoid three-waste pollution, and technology is simple, easy to operate, production cost is low.
Main points of the present invention are: carbonaceous raw material, with a certain proportion of phosphoric acid solution dipping, experience processes such as charing, activation, recovery, drying, ball milling then.And the best impregnating ratio of dipping is: 100%H
3PO
4: over dry wood chip=2.5～3: 1, imbibition is than being 100%H
3PO
4: over dry wood chip=1.25～1.5: 1, soak material concentration: H
3PO
4%(g/g): 40.5～51%; Activation temperature is 400～600 ℃, and soak time is 0.5～2 hour.The equipment that cooperating present method to produce gac provides is a flattening oven.It is by the combustion chamber, quirk up and down, and straight quirk, the carbonization-activation chamber, drying shed, flue constitutes.Be provided with in the combustion chamber by adding coal bunker, the auger of delivering coal, the lower feeding back fire device that burning bucket is formed.Above-mentioned each chamber, road and partition wall thereof build up by acidproof, refractory materials.
Accompanying drawing 1 is carbonization-activation stove facade structures synoptic diagram of the present invention.
Accompanying drawing 2 is a carbonization-activation stove A-A cross-sectional view.
The invention will be further described with embodiment below in conjunction with accompanying drawing.
With acidproof, refractory brick, comprise its iron oxide content below 0.4～0.8%, the total content of potassium, sodium, calcium, magnesium oxide is built into the carbonization-activation stove as the accompanying drawing structure at the silica brick below 2%, high alumina brick or schamotte brick.1, combustion chamber, 2, the lower feeding back fire device; 3, following quirk, 4, straight quirk, 5, go up quirk, 6, the carbonization-activation chamber, 7, drying shed, 8, flue, 9, partition plate.(1) is provided with by burning bucket (10), the auger of delivering coal (11), adds the lower feeding back fire device (2) that coal bunker (12), wheel box (13), motor (14) constitute in the combustion chamber.
By impregnating ratio is 100%H
3PO
4: over dry wood chip=2.5～3: 1 ratio calculates the raw material wood chip consumption of certain water content and concentration expressed in percentage by weight and is 40.5～51% H
3PO
4Solution usage adds respectively in the acid-resistant stoneware container, floods about 8 hours; Put steeping fluid then, the dipping wood chip is added in the carbonization-activation chamber (6) of carbonization-activation stove; By the stack gas that produces in combustion chamber (1) by quirk (3), straight quirk (4) down, go up the impregnant in quirk (5) the indirect heating carbonization-activation chamber (6), heating process temperature raises gradually and makes it charing earlier, when temperature rises to 400～600 ℃, enter activation stage, soak time is 0.5～2 hour; In the carbonization-activation process, available wooden shovel stirs material, makes it to be heated evenly; Material after the activation draws off in the stove and cools off; Deliver to acid-proof ceramics then and reclaim cylinder, add rare H
3PO
4Solution, and feed and to be steam heated to 80～100 ℃, fully stir, left standstill 10～20 minutes, change into phosphoric acid fully to promote the metaphosphoric acid in the gac, emit H
3PO
4Washing lotion recycles.Rinsing is 5～7 times so repeatedly, uses hot water rinsing first and second at last; Can send the gac of cleaning back in the stove drying shed (7); After the oven dry, cooling; Packing; Finish whole process of production.
Produce gac with this law, the over dry wood chip charcoal rate average out to more than 45%, higher by 10% than zinc chloride process.Product foreign matter content inferior quality is good, and particularly the carbonization-activation chamber adopts acid-resistant refractory brick to be built into, and operational tool replaces spade with the wood shovel, has avoided deleterious irony to bring into.Simultaneously because phosphoric acid is just resolving into P more than 800 ℃
2O
5Volatilization, and the temperature of this activation procedure is controlled at 400～600 ℃, so obnoxious flavour is seldom overflowed, the dilute phosphoric acid in the rinsing process is that use is reclaimed in circulation, so the essentially no three waste discharge of whole process of production.
The simple and reliable easy row of the inventive method and equipment, reduced investment, last detective, cost is low.
Claims (4)
1, a kind of method of producing active carbon by phosphoric acid method comprises containing the prescription dipping of carbonaceous raw material with regulation, experiences charing, activation, recovery, drying, mechanical milling process then, it is characterized in that:
Optimum formula is: impregnating ratio: 100%H
3PO
4: over dry wood chip=2.5～3: 1,
Imbibition ratio: 100%H
3PO
4: over dry wood chip=1.25～1.5: 1,
Soak material concentration: H
3PO
4% (g/g): 40.5～51%;
Activation temperature: 400～600 ℃, soak time: 0.5～2 hour.
2,, it is characterized in that removal process adopts to stir intermittent type that the gac after promptly activated is placed in the acid-resistant container, adds rare H by the method for the described producing active carbon by phosphoric acid method of claim 1
3PO
4Solution, and feed and to be steam heated to 80～100 ℃, fully stir, left standstill 10～20 minutes, emit H
3PO
4Washing lotion recycles, and reclaims so repeatedly 5～7 times, uses hot water rinsing one to secondary at last.
3, a kind of equipment of producing active carbon by phosphoric acid method, it is a flattening oven, comprise combustion chamber (1), following quirk (3), straight quirk (4), go up quirk (5), carbonization-activation chamber (6), drying shed (7), flue (8), partition plate (9), it is characterized in that above-mentioned each chamber, road and partition plate thereof build up by acid-proof refractory.
4, by the described producing active carbon by phosphoric acid method equipment of claim 3, it is characterized in that acid-proof refractory is silica brick or high alumina brick or clay matter brick, the content of its ferric oxide is below 0.4～0.8%, and the total content of potassium, sodium, calcium, magnesium oxide is below 2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88102426 CN1030065C (en) | 1988-04-23 | 1988-04-23 | Method and equipment for producing active carbon by phosphoric acid method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88102426 CN1030065C (en) | 1988-04-23 | 1988-04-23 | Method and equipment for producing active carbon by phosphoric acid method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN88102426A CN88102426A (en) | 1988-11-02 |
| CN1030065C true CN1030065C (en) | 1995-10-18 |
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ID=4832159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88102426 Expired - Fee Related CN1030065C (en) | 1988-04-23 | 1988-04-23 | Method and equipment for producing active carbon by phosphoric acid method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030065C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302987C (en) * | 2004-12-28 | 2007-03-07 | 华南理工大学 | Surface-activated carbon fiber and its preparation method |
| KR101628416B1 (en) * | 2008-08-05 | 2016-06-08 | 다우 글로벌 테크놀로지스 엘엘씨 | Lithium metal phosphate/carbon nanocomposites as cathode active materials for rechargeable lithium batteries |
| CN103570016A (en) * | 2013-09-29 | 2014-02-12 | 安徽金叶炭素科技有限公司 | Phosphoric acid process full-automatic post-processing method for powdered activated carbon |
| CN105502382A (en) * | 2014-09-26 | 2016-04-20 | 江西元力怀玉山活性炭有限公司 | Flat plate furnace process for producing active carbon |
| CN105217626A (en) * | 2015-10-10 | 2016-01-06 | 西安工程大学 | A kind of preparation method of nut-shell matrix activated carbon |
-
1988
- 1988-04-23 CN CN 88102426 patent/CN1030065C/en not_active Expired - Fee Related
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| CN88102426A (en) | 1988-11-02 |
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