CN104843699A - Method for preparing formed granular activated carbon for sugar solution decolorization by using waste powdered activated carbon - Google Patents
Method for preparing formed granular activated carbon for sugar solution decolorization by using waste powdered activated carbon Download PDFInfo
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Abstract
The invention discloses a method for preparing formed granular activated carbon for sugar solution decolorization by using waste powdered activated carbon, which comprises the following steps: completely dissolving one or more of soluble starch, polyvinyl alcohol, polyvinyl butyral and polyethyleneglycol in water as an additive, uniformly mixing the additive with coal tar, uniformly mixing waste powdered activated carbon with the mixed solution, cooling to room temperature, carrying out extrusion forming with hydraulic equipment, drying the formed carbon sample in a drying oven, carbonizing the dried formed carbon sample in a carbonization furnace at 500-800 DEG C, putting a right amount of carbonized sample in a rotary furnace, and activating at 700-900 DEG C by a water vapor activation process to obtain the final formed granular activated carbon. The method can prepare the formed granular activated carbon which has the characteristics of high strength, high caramel decolorization rate, high water resistance and the like.
Description
Technical field
The invention belongs to the preparing technical field of Sugarcane juice decolorization shaped granule gac, be specifically related to a kind of method utilizing discarded powdered carbon to prepare Sugarcane juice decolorization shaped granule gac.
Background technology
Gac be widely used in gas phase and liquid phase decolouring, be separated, the aspect such as refine.For one of main application that Sugarcane juice decolorization is gac, the consumption of this kind gac is large.Gac for Sugarcane juice decolorization needs to have higher Sugarcane juice decolorization rate, reach higher Sugarcane juice decolorization rate, then require that gac has more flourishing central hole structure, and prepare the industrial process mainly chemical activation method such as phosphoric acid activation method and zinc chloride activation method with the more flourishing gac of mesopore at present, damage ratio is comparatively large, is difficult to realize cleaner production.
At present, Activated carbon for refining of suger is powdered carbon mainly, and in actual use, powdered carbon is mainly suitable for andnon-continuous operation manner, can not realize the continous way operation of fixed bed.Shaped granule gac can use fixed bed, is conducive to realizing operate continuously.Pressed active carbon not only requires to have flourishing pore texture, higher absorption property, and needs enough intensity, just can be applied in actual continuous operation process.At present, the shaped granule gac that production bore gap structure is more flourishing and intensity is higher mainly adopts the physical activation methods such as steam activation, although the chemical activation methods such as phosphoric acid can produce shaped granule gac, its intensity is difficult to the service requirements reaching fixed bed.But the pore dimension of the gac that vapor activation is produced is less, is usually in range of micropores, and the gac that the physical activation methods such as industrial water vapour are produced does not have caramel decolorizing effect usually, caramel decolouring namely can not be applied to.Therefore, preparation and produce there is higher caramel decolorization rate, a technical barrier that shaped granule gac that intensity is higher is gac field, be the research emphasis of gac academia and the key areas of industry member research and development for a long time.
Existing many preparation methods that patent discloses pressed active carbon, patent (application number 200810055493.3) disclose a kind of take coal dust as raw material, pitch a kind of column pressed active carbon production method that is activator for sizing agent and water vapour, be mainly used in industrially desulfurized, based on microvoid structure, not there is the ability of Sugarcane juice decolorization.Patent (publication number CN1295027A) discloses a kind of pore structure regulate and control method of pressed active carbon.Its method is: in starting material resol, add pore-forming material polyvinyl butyral acetal and polyoxyethylene glycol, utilize steam activation in the supercritical state, producing shaped gac.The method working condition requires strict, and cost is very high, and the gac specific surface area of producing and total pore volume less, pore texture is not too flourishing, and its specific surface area is 1250m
2.g
-1, total pore volume is 0.67cm
3.g
-1.The method can increase the mesopore proportion of pressed active carbon, but Sugarcane juice decolorization poor effect, not there is using value.US Patent No. 6787494 discloses a kind of manufacture method of pressed active carbon.Its method is: in powdery cocoanut active charcoal, add resol, water, methylcellulose gum, methanol mixed extrusion molding, carries out pyrolysis and obtain pressed active carbon under 900 DEG C of conditions.Adopt the intensity of the pressed active carbon prepared by the method high, but pore texture is not too flourishing, based on micropore, does not have Sugarcane juice decolorization ability.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art; the object of this invention is to provide a kind of method utilizing discarded powdered carbon to prepare Sugarcane juice decolorization shaped granule gac; solve the production technology difficult problem that Sugarcane juice decolorization pressed active carbon has high strength and high Caramel adsorption concurrently, product have hole wide comparatively large, for characteristics such as Sugarcane juice decolorizations.
Technical scheme: in order to realize foregoing invention object, the technical solution used in the present invention is:
Utilize discarded powdered carbon to prepare a method for Sugarcane juice decolorization shaped granule gac, comprise the following steps:
(1) one or several getting in Zulkovsky starch, polyvinyl alcohol, polyvinyl butyral acetal and polyoxyethylene glycol are dissolved in the water completely as additive, additive and coal tar are mixed under the condition of heating;
(2) in a heated condition, additive mixing and stirring in powdered carbon and step (1) is discarded being crushed to 100 ~ 200 objects, wherein, the mass ratio of discarded powdered carbon and coal tar is 1:1 ~ 2.5, and one or several quality sums of Zulkovsky starch, polyvinyl alcohol, polyvinyl butyral acetal, polyoxyethylene glycol and the mass ratio of discarded powdered carbon are 1:1 ~ 6;
(3) use hydraulic efficiency installation extrusion molding under the pressure of 5 ~ 10t after the mixing charcoal sample in step (2) being cooled to room temperature, and be positioned over 100 ~ 150 DEG C of baking oven inner drying 12 ~ 48h;
(4) forming charcoal sample charring furnace in step (3) is carbonized under 500 ~ 800 DEG C of conditions, take out after being down to room temperature and namely obtain carbonizing sample;
(5) charing sample in step (4) is placed in employing vapor activation in rotary kiln to activate under 700 ~ 900 DEG C of conditions, final molding granulated active carbon can be obtained.
Described discarded powdered carbon is the discarded powdered carbon after the application places such as Sugarcane juice decolorization decolours with refining, wastewater treatment, monosodium glutamate, medicine is refining use.
Described coal tar comprises coal-tar heavy oil, coal-tar middle oil and coalite tar.
Described discarded powdered carbon is ature of coal powdered carbon, shell powdered carbon or wood powder shaped activated carbon.
The extrusion molding under the pressure of 10t of charcoal sample, at 110 ~ 150 DEG C of baking oven inner dryings.
Dry charcoal sample charring furnace in step (3) carbonizes at 800 DEG C.
Charing sample is placed in rotary kiln and adopts vapor activation to activate under 850 ~ 900 DEG C of conditions.
Beneficial effect, compared with prior art, the present invention has the following advantages:
1) raw material of producing shaped granulated active carbon is discarded powdered carbon, can realize the recycling of discarded powdered carbon, cuts the waste and pollute, reduce production cost.
2) with the addition of one or several additives in Zulkovsky starch, polyvinyl alcohol, polyvinyl butyral acetal and polyoxyethylene glycol at formative stage, product have hole wide comparatively large, for characteristics such as Sugarcane juice decolorizations.
3) the production technology difficult problem that Sugarcane juice decolorization pressed active carbon has high strength and high Caramel adsorption concurrently is effectively solved, Be very effective, this invention can prepare that intensity is high, water-tolerant, caramel decolorization rate can reach 110% high-performance Sugarcane juice decolorization pressed active carbon.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment 1
By 20g Zulkovsky starch, 28g polyvinyl butyral acetal, for subsequent use as additive in the deionized water of the quality such as 14g polyethylene glycol 6000 is dissolved completely in respectively, under the condition of water bath heating of 80 DEG C, additive and 134g coal-tar heavy oil are uniformly mixed, then add the discarded coal mass active carbon 84g of 100 orders drying to stir and make fully to mix half an hour more than, then said mixture is poured into mould, column charcoal is squeezed under the pressure of 10t, the column charcoal extruded is put into the dry 24h of the baking oven of 110 DEG C, then take out and be down to room temperature and put into retort and be heated to 800 DEG C with the temperature rise rate of 5 DEG C/min, be down to room temperature after insulation 2h charing to take out, above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, 900 DEG C are raised to the temperature rise rate of 5 DEG C/min, disconnect nitrogen simultaneously and pass into 150 DEG C with the speed of 5mL/min, the water vapour of 0.4MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
Embodiment 2
By 14g polyvinyl alcohol, 7g Macrogol 4000, 7g Zulkovsky starch to be dissolved completely in etc. in quality deionized water for subsequent use as additive, under the condition of water bath heating of 100 DEG C, additive and 67g coal-tar heavy oil are uniformly mixed, then add 100 objects dry waste wood gac 42g to stir and make fully to mix half an hour more than, then said mixture is poured into mould, column charcoal is squeezed under the pressure of 10t, the column charcoal extruded is put into the dry 48h of the baking oven of 100 DEG C, then take out and be down to room temperature and put into retort and be heated to 800 DEG C with the temperature rise rate of 10 DEG C/min, be down to room temperature after insulation 2h charing to take out, above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, 850 DEG C are raised to the temperature rise rate of 5 DEG C/min, disconnect nitrogen simultaneously and pass into 130 DEG C with the speed of 10mL/min, the water vapour of 0.3MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
Embodiment 3
By 20g polyvinyl butyral acetal, 20g Zulkovsky starch, 10g polyethylene glycol 6000 to be dissolved completely in etc. in quality deionized water for subsequent use as additive, under the condition of water bath heating of 80 DEG C, additive and 48g coal-tar heavy oil are uniformly mixed, then the waste wood gac 30g adding 100 object dryings stirs and makes fully to mix half an hour more than, then said mixture is poured into mould, column charcoal is squeezed under the pressure of 10t, the column charcoal extruded is put into the dry 24h of the baking oven of 120 DEG C, then take out and be down to room temperature and put into retort and be heated to 800 DEG C with the temperature rise rate of 5 DEG C/min, be down to room temperature after insulation 2h charing to take out, above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, 900 DEG C are raised to the temperature rise rate of 5 DEG C/min, disconnect nitrogen simultaneously and pass into 150 DEG C with the speed of 5mL/min, the water vapour of 0.4MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
Comparative example 1
Under the condition of water bath heating of 90 DEG C, 30g is crushed to the dry waste wood gacs of 100 objects to make fully to mix with more than 48g coal-tar heavy oil mix and blend half an hour, then said mixture is poured into mould, the baking oven inner drying 48h of 100 DEG C is put into after extrusion molding under the pressure of 10t, taking-up is put into retort and is heated to 800 DEG C with the temperature rise rate of 10 DEG C/min after being down to room temperature, after insulation 1h, cooling is taken out, then above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, be raised to 900 DEG C with the temperature rise rate of 10 DEG C/min simultaneously, disconnect nitrogen simultaneously and pass into 150 DEG C with the speed of 5mL/min, the water vapour of 0.4MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
Comparative example 2
20g is crushed to the discarded cocoanut active charcoal of 100 object drying more than half an hour make fully to mix with 40g coal-tar heavy oil mix and blend under 80 DEG C of condition of water bath heating, then said mixture is poured into mould, the baking oven inner drying 48h of 110 DEG C is put into after extrusion molding under the pressure of 10t, taking-up is put into retort and is heated to 800 DEG C with the temperature rise rate of 10 DEG C/min after being down to room temperature, after insulation 2h, cooling is taken out, then above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, be raised to 850 DEG C with the temperature rise rate of 10 DEG C/min simultaneously, disconnect nitrogen simultaneously and pass into 150 DEG C with the speed of 5mL/min, the water vapour of 0.4MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
Comparative example 3
30g is crushed to the dry waste wood gacs of 100 objects make fully to mix with more than 66g coal-tar heavy oil mix and blend half an hour, then said mixture is poured into mould, the baking oven inner drying 48h of 120 DEG C is put into after extrusion molding under the pressure of 10t, taking-up is put into retort and is heated to 800 DEG C with the temperature rise rate of 10 DEG C/min after being down to room temperature, after insulation 2h, cooling is taken out, then above-mentioned carbonized material is placed in atmosphere rotary type resistance furnace and passes into nitrogen protection, be raised to 850 DEG C with the temperature rise rate of 10 DEG C/min simultaneously, disconnect nitrogen simultaneously and pass into 150 DEG C with the speed of 10mL/min, the water vapour of 0.4MPa, disconnect water vapour after insulation 2h to pass into after nitrogen is down to room temperature and can obtain pressed active carbon.Its performance is as shown in table 1.
The performance perameter of each pressed active carbon in table 1 embodiment and comparative example
Note: in table, "/" represents and this value can not be detected.
Claims (7)
1. utilize discarded powdered carbon to prepare a method for Sugarcane juice decolorization shaped granule gac, it is characterized in that, comprise the following steps:
(1) one or several getting in Zulkovsky starch, polyvinyl alcohol, polyvinyl butyral acetal and polyoxyethylene glycol are dissolved in the water completely as additive, additive and coal tar are mixed under the condition of heating;
(2) in a heated condition, additive mixing and stirring in powdered carbon and step (1) is discarded being crushed to 100 ~ 200 objects, wherein, the mass ratio of discarded powdered carbon and coal tar is 1:1 ~ 2.5, and one or several quality sums of Zulkovsky starch, polyvinyl alcohol, polyvinyl butyral acetal, polyoxyethylene glycol and the mass ratio of discarded powdered carbon are 1:1 ~ 6;
(3) use hydraulic efficiency installation extrusion molding under the pressure of 5 ~ 10t after the mixing charcoal sample in step (2) being cooled to room temperature, and be positioned over 100 ~ 150 DEG C of baking oven inner drying 12 ~ 48h;
(4) forming charcoal sample charring furnace in step (3) is carbonized under 500 ~ 800 DEG C of conditions, take out after being down to room temperature and namely obtain carbonizing sample;
(5) charing sample in step (4) is placed in employing vapor activation in rotary kiln to activate under 700 ~ 900 DEG C of conditions, final molding granulated active carbon can be obtained.
2. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: to be Sugarcane juice decolorization decolour with refining, wastewater treatment, monosodium glutamate described discarded powdered carbon, medicine refine application places use after discarded powdered carbon.
3. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: described coal tar comprises coal-tar heavy oil, coal-tar middle oil and coalite tar.
4. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: described discarded powdered carbon is ature of coal powdered carbon, shell powdered carbon or wood powder shaped activated carbon.
5. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: the extrusion molding under the pressure of 10t of charcoal sample, at 110 ~ 150 DEG C of baking oven inner dryings.
6. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: the dry charcoal sample charring furnace in step (3) carbonizes at 800 DEG C.
7. the method that powdered carbon prepares Sugarcane juice decolorization shaped granule gac is discarded in utilization according to claim 1, it is characterized in that: charing sample is placed in rotary kiln and adopts vapor activation to activate under 850 ~ 900 DEG C of conditions.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106865542A (en) * | 2017-02-23 | 2017-06-20 | 成都国化环保科技有限公司 | A kind of activated carbon with hollow morphology |
| CN107185495A (en) * | 2017-07-05 | 2017-09-22 | 浙江省林业科学研究院 | The method and its activation equipment of a kind of useless burgy photo reversal type cellular activated carbon |
| CN107235489A (en) * | 2017-06-27 | 2017-10-10 | 南京林业大学 | A kind of preparation method of high-specific surface area Alveolate activated carbon |
| CN108928972A (en) * | 2018-07-12 | 2018-12-04 | 李晓军 | Have effects that the bioactive water of lower hyperlipidemia, hypertension, hyperglycemia and its production technology |
| CN110357098A (en) * | 2019-07-10 | 2019-10-22 | 南京安捷特环保科技有限公司 | A kind of production method of active carbon by physical |
| CN110655077A (en) * | 2019-11-01 | 2020-01-07 | 海南星光活性炭有限公司 | Preparation method of coconut shell based columnar activated carbon |
| CN111573668A (en) * | 2020-05-22 | 2020-08-25 | 大同煤矿集团有限责任公司 | Activated carbon prepared from waste carbonized material powder and preparation method and application thereof |
| CN115624952A (en) * | 2022-09-15 | 2023-01-20 | 城康材料技术有限公司 | Novel carbon material and preparation method and application thereof |
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| CN106865542A (en) * | 2017-02-23 | 2017-06-20 | 成都国化环保科技有限公司 | A kind of activated carbon with hollow morphology |
| CN107235489A (en) * | 2017-06-27 | 2017-10-10 | 南京林业大学 | A kind of preparation method of high-specific surface area Alveolate activated carbon |
| CN107185495A (en) * | 2017-07-05 | 2017-09-22 | 浙江省林业科学研究院 | The method and its activation equipment of a kind of useless burgy photo reversal type cellular activated carbon |
| CN108928972A (en) * | 2018-07-12 | 2018-12-04 | 李晓军 | Have effects that the bioactive water of lower hyperlipidemia, hypertension, hyperglycemia and its production technology |
| CN110357098A (en) * | 2019-07-10 | 2019-10-22 | 南京安捷特环保科技有限公司 | A kind of production method of active carbon by physical |
| CN110655077A (en) * | 2019-11-01 | 2020-01-07 | 海南星光活性炭有限公司 | Preparation method of coconut shell based columnar activated carbon |
| CN111573668A (en) * | 2020-05-22 | 2020-08-25 | 大同煤矿集团有限责任公司 | Activated carbon prepared from waste carbonized material powder and preparation method and application thereof |
| CN111573668B (en) * | 2020-05-22 | 2023-05-26 | 晋能控股煤业集团有限公司 | Activated carbon prepared from waste carbonized material powder, and preparation method and application thereof |
| CN115624952A (en) * | 2022-09-15 | 2023-01-20 | 城康材料技术有限公司 | Novel carbon material and preparation method and application thereof |
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