CN102432004A - Active carbon for deeply purifying drinking water and preparation method thereof - Google Patents
Active carbon for deeply purifying drinking water and preparation method thereof Download PDFInfo
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- CN102432004A CN102432004A CN2011102834339A CN201110283433A CN102432004A CN 102432004 A CN102432004 A CN 102432004A CN 2011102834339 A CN2011102834339 A CN 2011102834339A CN 201110283433 A CN201110283433 A CN 201110283433A CN 102432004 A CN102432004 A CN 102432004A
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Abstract
The invention discloses active carbon for deeply purifying drinking water and a preparation method thereof. The method comprises the following steps: (1) mixing anthracite and coking coal, and successively crushing and milling to obtain mixed powder; (2) briquetting the mixed powder to obtain a block material; and (3) carrying out carbonization and activation on the block material to obtain the active carbon. The active carbon for deeply purifying drinking water and the preparation method using anthracite as a main raw material aim at the disadvantages of products and production methods in the prior art and combine the domestic current situation of raw material coal resources. The prepared active carbon has the advantages of good performance, low cost, and good effect of deeply purifying the drinking water, and is top grade active carbon for deeply purifying drinking water.
Description
Technical field
The present invention relates to a kind of gac and preparation method thereof, particularly a kind of used for purifying drinking water gac and preparation method thereof.
Background technology
China is one of 13 countries of in the world poor-water at present; " Chinese environmental performance evaluation " report according to the up-to-date announcement of the Organization for Economic Cooperation and Development; 75% the water body of surpassing of Chinese city of flowing through at present is not suitable for drinking, and the detection water quality of river more than 30% belongs to bad V class.Along with industrial development, the contaminated degree of urban life drinking water source is increasingly sharpened, and simultaneously along with growth in the living standard, people are more and more stricter to the requirement and the drinking water quality standard of drinking water quality.
Therefore gac has stronger adsorptive power to dissolved organic matter in the water owing to have huge specific surface area and flourishing gap structure, is applicable to drinking water deep purification.
Domestic still useless in the special-purpose activated charcoal of drinking water deep purification.And the activated carbon product that adopt in market mainly contains two types, is promptly processed by the columnar activated carbon fragmentation, perhaps adopts the direct broken gac of raw coal, and this two series products is used for the drinking water deep processing and all has insoluble drawback.Fail to reach fully the standard of Drinking Water purifying treatment with gac.The operation that domestic preparative column shaped activated carbon adopts usually is: 1, abrasive dust, carry out abrasive dust with feed coal through pulverizing mill; 2, press strip moulding is with coal dust, coal tar (sticker) and less water stirring, mixing, press strip moulding; 3, charing is with the molding mass charing; 4, activation adds Stepple furnace with carbonized material and carries out activation; 5, fragmentation is with the columnar activated carbon after the activation broken (sieve into the indefinite form granulated active carbon and be used for drink water purifying).(publication number GK87100558)
Produce columnar activated carbon and have following problem: 1, complex manufacturing, broken yield is low, and production cost is high relatively; 2, owing to must use the coal tar wet goods as cakingagent, therefore also make tar resource effectively not utilize, production process is big to environmental influence.
The operation of the direct broken gac of domestic preparation raw coal is: 1, fragmentation is broken into the desired granularity particle of product (size range is 1-8mm) with feed coal; 2, charing or calcining; 3, activation with broken raw coal direct activation, or is carried out activation with the coal after the charing calcining.(the patent No.: ZL97111096.4) (a kind of indefinite form granulated active carbon and method of manufacture made from hard coal thereof).There are shortcomings such as bulk density is light, physical strength is low in the direct broken gac of raw coal that this method is produced.
More than the gacs of two kinds of methods preparation, be used for drinking water deep purification, be difficult in have than the long life condition under, tap water up to standard is provided.Domestic is that the gac of feedstock production mainly is above two kinds of gacs with the Taixi anthracite.Abroad, drink water purifying mainly adopts the broken gac of briquetting.Because the briquetting Activated Carbon Production requires the feed coal processability good, the briquetting gac that the water purification that temporary at home useless hard coal is a feedstock production is special-purpose.
The evaluation index of drinking water deep purification gac mainly refers to iodine number, Socryl Blue BRL adsorptive value, intensity, to proportion, its floatability etc., to confirm the quality of charcoal absorption performance and physical and chemical performance.
Summary of the invention
The purpose of this invention is to provide a kind of water purification with gac and preparation method thereof.
A kind of water purification provided by the invention is used preparation method of active carbon, comprises the steps:
(1) hard coal and coking coal mix and obtain mixed powder through broken and powder process successively;
(2) said mixed powder is carried out compound stalk forming and get the briquetting material;
(3) said briquetting material promptly gets said gac through charing and activation successively.
Sorbing material by the hard coal preparation is main with micropore, and the coal that metamorphic grade is low is main with mesopore, can promote the pore structure of sorbing material to grow through the coal blending technology, and when promoting that micropore is abundant, mesopore is also flourishing.In the aforesaid method, hard coal does not have agglutinating value(of coal), through allocating high close-burning coking coal into, has improved anthracitic compound stalk forming ability.
Among the above-mentioned preparation method, the ratio of quality and the number of copies of said hard coal and said coking coal can be (7-8): (1-3), specifically can be 7: 2.5,7: 1 or 8: 2.
Among the above-mentioned preparation method, mass content is 200 mesh sieves that pass through more than 99% in the said mixed powder.
Among the above-mentioned preparation method, also can comprise in said mixed powder the step that adds additive in the step (2), said additive and said anthracitic ratio of quality and the number of copies can be (0.3-0.8): (7-8), specifically can be 0.3: 7,0.7: 7 or 0.5: 8.
Among the above-mentioned preparation method, said additive can be pitch.
Among the above-mentioned preparation method, the pressure of said compound stalk forming can be 20MPa-30MPa, specifically can be 20MPa, 25MPa or 30MPa, and high-pressure molding equipment capable of using carries out compound stalk forming to said mixed powder.
Among the above-mentioned preparation method, the whole temperature of charing described in the step (3) can be 500 ℃-650 ℃, specifically can be 500 ℃, 580 ℃ or 650 ℃; The time of said charing can be 30min-90min, specifically can be 40min, 60min or 90min; The temperature rise rate of said charing can be 4 ℃/min-8 ℃/min, specifically can be 4 ℃/min, 6 ℃/min or 8 ℃/min.
Among the above-mentioned preparation method, activatory temperature described in the step (3) can be 700 ℃-950 ℃, specifically can be 700 ℃, 800 ℃ or 950 ℃; The said activatory time can be 120min-200min, specifically can be 120min, 170min or 200min.
The invention provides gac by method for preparing.
The special-purpose briquetting gac of this tap water is compared with the existing gac that is used for drinking water deep purification of existing market has following advantage:
The present invention has the following advantages:
(1) raw material resources: the Taixi anthracite aboundresources is the main raw materials for production of China's active carbon from coal.
(2) preparation method: with the hard coal is raw material, makes through processes such as compound stalk forming, charing, activation, and process is simple, is easy to realize, low than column property gac running cost, and resource utilization is high, is fit to scale operation.
(3) product performance: the gac of the present invention's preparation has characteristics such as loading capacity is big, physical strength good, bulk density height, is suitable for the deep purifying of tap water, and has reached international similar with top grade level in the product.
(4) industrial application: with respect to being used for the drinking water deep purification gac on the existing market, this good product performance, cost be low, have drinking water deep purification function preferably, is the drink water purifying special-purpose activated charcoal of higher class.
Embodiment
Employed experimental technique is ordinary method like no specified otherwise among the following embodiment.
Used material, reagent etc. like no specified otherwise, all can obtain from commercial sources among the following embodiment.
Embodiment 1, water purification are with the preparation of gac
(1) fragmentation: with hard coal and coking coal all be broken into the particle that particle diameter is 5mm, then with hard coal and coking coal according to ratio of quality and the number of copies be 7: 2.5 proportioning mix compound; Above-mentioned compound is got mixed powder through ball mill powder process, and wherein the mixed powder more than 99% can pass through 200 mesh sieves;
(2) compound stalk forming: pitch is mixed with the above-mentioned mixed powder that makes; Wherein, Bituminous add-on and anthracitic ratio of quality and the number of copies are 0.7: 7, and the powder that utilizes pair roller high-pressure molding equipment that mixing is obtained then carries out the dry method compound stalk forming and obtains the briquetting material under 20MPa pressure;
(3) charing: the above-mentioned briquetting material that obtains is carried out charing obtain activated material in the external-heating revolving stove, the whole temperature of charing is 580 ℃, and the control temperature rise rate is 4 ℃/min, and carbonization time is 40min;
(4) activation: the above-mentioned activated material that obtains is carried out activation in rotary kiln, activation temperature is 800 ℃, and soak time is 200 minutes, obtains activated material, after fragmentation, screening, obtains the crushed particles activated carbon product again.
The performance perameter of the gac of present embodiment preparation is as shown in table 1.
Embodiment 2, water purification are with the preparation of gac
(1) fragmentation: with hard coal and coking coal all be broken into the particle that particle diameter is 3mm, then with hard coal and coking coal according to ratio of quality and the number of copies be 7: 1 proportioning mix compound; Above-mentioned compound is got mixed powder through ball mill powder process, and wherein the mixed powder more than 99% can pass through 200 mesh sieves;
(2) compound stalk forming: pitch is mixed with the above-mentioned mixed powder that makes; Wherein, Bituminous add-on and anthracitic ratio of quality and the number of copies are 0.3: 7, and the powder that utilizes pair roller high-pressure molding equipment that mixing is obtained then carries out the dry method compound stalk forming and obtains the briquetting material under 30MPa pressure;
(3) charing: the above-mentioned briquetting material that obtains is carried out charing obtain activated material in the external-heating revolving stove, the whole temperature of charing is 500 ℃, and the control temperature rise rate is 6 ℃/min, and carbonization time is 90min;
(4) activation: the above-mentioned activated material that obtains is carried out activation in rotary kiln, activation temperature is 700 ℃, and soak time is 170 minutes, obtains activated material, after fragmentation, screening, obtains the crushed particles activated carbon product again.
The performance perameter of the gac of present embodiment preparation is as shown in table 1.
Embodiment 3, water purification are with the preparation of gac
(1) fragmentation: with hard coal and coking coal all be broken into the particle that particle diameter is 5mm, then with hard coal and coking coal according to ratio of quality and the number of copies be 8: 2 proportioning mix compound; Above-mentioned compound is got mixed powder through ball mill powder process, and wherein the mixed powder more than 99% can pass through 200 mesh sieves;
(2) compound stalk forming: pitch is mixed with the above-mentioned mixed powder that makes; Wherein, Bituminous add-on and anthracitic ratio of quality and the number of copies are 0.5: 8, and the powder that utilizes pair roller high-pressure molding equipment that mixing is obtained then carries out the dry method compound stalk forming and obtains the briquetting material under 25MPa pressure;
(3) charing: the above-mentioned briquetting material that obtains is carried out charing obtain activated material in the external-heating revolving stove, the whole temperature of charing is 650 ℃, and the control temperature rise rate is 8 ℃/min, and carbonization time is 60min;
(4) activation: the above-mentioned activated material that obtains is carried out activation in rotary kiln, activation temperature is 950 ℃, and soak time is 120 minutes, obtains activated material, after fragmentation, screening, obtains the crushed particles activated carbon product again.
The performance perameter of the gac of present embodiment preparation is as shown in table 1.
The performance index of the gac of table 1 national standard top grade article water purification active carbon and embodiment 1-3 preparation
The iodine number of the foregoing description gac, methylene blue number and abrasive wear resistance detect by GB/T7702.7-2008, GB/T7702.6-2008 and GB/T 12496.6-1999 respectively.
Claims (8)
1. a water purification is used preparation method of active carbon, comprises the steps:
(1) hard coal and coking coal mix and obtain mixed powder through broken and powder process successively;
(2) said mixed powder is carried out compound stalk forming and get the briquetting material;
(3) said briquetting material promptly gets said gac through charing and activation successively.
2. method according to claim 1 is characterized in that: the ratio of quality and the number of copies of said hard coal and said coking coal is (7-8): (1-3).
3. method according to claim 1 and 2 is characterized in that: also comprise the step that in said mixed powder, adds additive in the step (2), said additive and said anthracitic ratio of quality and the number of copies are (0.3-0.8): (7-8).
4. method according to claim 3 is characterized in that: said additive is a pitch.
5. according to arbitrary described method among the claim 1-5, it is characterized in that: the pressure of said compound stalk forming is 20MPa-30MPa.
6. according to arbitrary described method among the claim 1-5, it is characterized in that: the whole temperature of charing described in the step (3) is 500 ℃-650 ℃; The time of said charing is 30min-90min; The temperature rise rate of said charing is 4 ℃/min-8 ℃/min.
7. according to arbitrary described method among the claim 1-6, it is characterized in that: activatory temperature described in the step (3) is 700 ℃-950 ℃; The said activatory time is 120min-200min.
8. the gac that arbitrary said method prepares among the claim 1-7.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103011158A (en) * | 2012-12-07 | 2013-04-03 | 淮北市森化碳吸附剂有限责任公司 | Technique for preparing columnar activated carbon by tar-free binding agent |
| CN103848421A (en) * | 2014-02-20 | 2014-06-11 | 煤炭科学研究总院 | Activated carbon prepared by multiple-hearth furnace for deep purification of drinking water and preparation method or activated carbon |
| CN104383876A (en) * | 2014-10-23 | 2015-03-04 | 山西新华化工有限责任公司 | Preparation method of granular active carbon for sewage treatment |
| CN106044766A (en) * | 2016-05-31 | 2016-10-26 | 神华集团有限责任公司 | Preparation method of coal-based agglomerated activated carbon having high adsorbability and high bulk specific weight |
| CN106241800A (en) * | 2016-08-30 | 2016-12-21 | 宁夏华辉活性炭股份有限公司 | The specially method for preparation of active carbon of effect absorption tetrafluoride charcoal |
| CN107381568A (en) * | 2017-08-31 | 2017-11-24 | 贺守印 | A kind of activated carbon and preparation method thereof |
| CN112657467A (en) * | 2021-02-05 | 2021-04-16 | 贵州敦信科技有限公司 | High-adsorption-performance activated carbon for purifying water and preparation method thereof |
| CN114655955A (en) * | 2022-04-02 | 2022-06-24 | 山西新华防化装备研究院有限公司 | Preparation method of coconut shell based pressed activated carbon |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103011158A (en) * | 2012-12-07 | 2013-04-03 | 淮北市森化碳吸附剂有限责任公司 | Technique for preparing columnar activated carbon by tar-free binding agent |
| CN103848421A (en) * | 2014-02-20 | 2014-06-11 | 煤炭科学研究总院 | Activated carbon prepared by multiple-hearth furnace for deep purification of drinking water and preparation method or activated carbon |
| CN104383876A (en) * | 2014-10-23 | 2015-03-04 | 山西新华化工有限责任公司 | Preparation method of granular active carbon for sewage treatment |
| CN106044766A (en) * | 2016-05-31 | 2016-10-26 | 神华集团有限责任公司 | Preparation method of coal-based agglomerated activated carbon having high adsorbability and high bulk specific weight |
| CN106241800A (en) * | 2016-08-30 | 2016-12-21 | 宁夏华辉活性炭股份有限公司 | The specially method for preparation of active carbon of effect absorption tetrafluoride charcoal |
| CN106241800B (en) * | 2016-08-30 | 2018-08-03 | 宁夏华辉活性炭股份有限公司 | The specially method for preparation of active carbon of effect absorption carbon tetrafluoride |
| CN107381568A (en) * | 2017-08-31 | 2017-11-24 | 贺守印 | A kind of activated carbon and preparation method thereof |
| CN107381568B (en) * | 2017-08-31 | 2019-06-11 | 贺守印 | A kind of active carbon and preparation method thereof |
| CN112657467A (en) * | 2021-02-05 | 2021-04-16 | 贵州敦信科技有限公司 | High-adsorption-performance activated carbon for purifying water and preparation method thereof |
| CN114655955A (en) * | 2022-04-02 | 2022-06-24 | 山西新华防化装备研究院有限公司 | Preparation method of coconut shell based pressed activated carbon |
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