CN102151558A - Method for producing efficient absorbent by utilizing pyrolysis method - Google Patents
Method for producing efficient absorbent by utilizing pyrolysis method Download PDFInfo
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- CN102151558A CN102151558A CN 201110065054 CN201110065054A CN102151558A CN 102151558 A CN102151558 A CN 102151558A CN 201110065054 CN201110065054 CN 201110065054 CN 201110065054 A CN201110065054 A CN 201110065054A CN 102151558 A CN102151558 A CN 102151558A
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- solids
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- efficiency adsorbent
- rice husk
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Abstract
The invention mainly aims to provide a method for producing an efficient absorbent by utilizing a pyrolysis method. Through the method, pyrolysis solids can be recovered and reused. In order to realize the aim, the invention adopts the technical scheme that the method for producing the efficient absorbent by utilizing the pyrolysis method comprises the following steps: a, conveying rice hull into a thermal cracking furnace for thermal cracking and collecting solids generated by the thermal cracking; b, adding zinc salt into the collected solids for activation under the oxygen-free condition; and c, filtering the activated solids and washing the solids to be neutral to obtain the efficient absorbent. According to the processing method, after being collected, the solids generated by the thermal cracking are further activated to obtain the efficient absorbent with both the hydrophilcity and the lipophilicity. Compared with the common active carbon, the absorption effect of the absorbent is improved by 10 percent; and through the reutilization of the solids, the environmental pollution is reduced, and the production efficiency is also improved.
Description
Technical field
The present invention relates to a kind of pyrolysismethod and produce the method for high-efficiency adsorbent, specifically is a kind of processing method of producing high-efficiency adsorbent with rice husk.
Background technology
The main component of rice husk is carbon and silicon, after handling through pyrolysis liquefaction, can form siliceous and pyrolysis solids charcoal, silicon possess hydrophilic property in this pyrolysis solids, and charcoal has lipophile.Pyrolysis liquefaction is meant under complete anoxic or oxygen content situation seldom, rice husk is heated fast and pyrolysis is a kind of mixed vapour and a spot of pyrolysis solids, the wherein rapid condensation of mixed vapour and become a kind of primary liquid fuel, and the pyrolysis solids is directly as offal treatment, and this has just caused very big waste to resource.
Summary of the invention
Main purpose of the present invention provides the method that a kind of pyrolysismethod is produced high-efficiency adsorbent, and this method can be carried out recycling to the pyrolysis solids.
In order to realize the foregoing invention purpose, the technical solution adopted in the present invention is: a kind of pyrolysismethod is produced the method for high-efficiency adsorbent, may further comprise the steps:
A, rice husk delivered to carry out thermal cracking in the pyrocrack furnace, and collect the solids that thermal cracking produces;
Under b, the oxygen free condition, in the solids of collecting, add zinc salt and carry out activation processing;
C, the solids of activated processing is filtered, and washing is to neutral high-efficiency adsorbent.
According to processing method of the present invention, the solids that thermal cracking produces is collected further activation processing of back, both possess hydrophilic properties have just been obtained, has oil loving high-efficiency adsorbent again, this adsorbents adsorb effect is compared common activated carbon and has been improved 10%, the utilization again of solids has reduced environmental pollution, has also improved productivity effect simultaneously.
The specific embodiment
A kind of pyrolysismethod is produced the method for high-efficiency adsorbent, may further comprise the steps:
A, rice husk delivered to carry out thermal cracking in the pyrocrack furnace, and collect the solids that thermal cracking produces.This step promptly is the thermal cracking processes of rice husk, and rice husk is heated fast and pyrolysis is a kind of mixed vapour and a spot of pyrolysis solids, the wherein rapid condensation of mixed vapour and become a kind of primary liquid fuel, and the pyrolysis solids then collects to be done activation and handles.
Under b, the oxygen free condition, in the solids of collecting, add zinc salt and carry out activation processing.Activation processing is the adsorbent process that its aperture forms under the zinc salt effect, and the aperture forms can improve its adsorption capacity.
C, the solids of activated processing is filtered, and washing is to neutral high-efficiency adsorbent.This step is that unnecessary activator is removed by filter, and the activator that water will remain in the adsorbent cleans up, the solids that obtains at last is exactly a high-efficiency adsorbent, this adsorbents adsorb effect is compared common activated carbon and has been improved 10%, the utilization again of solids has reduced environmental pollution, has also improved productivity effect simultaneously.
Before being carried out thermal cracking, rice husk earlier rice husk is done pulverization process.Rice husk is crushed to the material of a certain size particle diameter, helps improving the effect of thermal cracking like this.
Described thermal cracking temperature is 400～600 ℃, and the time is 1～5 second.Here be to utilize the air-flow transport control system that the operation of thermal cracking is controlled.Rice husk is cracked into steam and small fraction of solid rapidly under this temperature, the gas phase time of staying of thermal cracking is difficult for long, otherwise solids can further be heated and destroyed after the cracking.
Described zinc salt is a zinc chloride, and zinc oxide concentration is 15～30%, and the mass ratio of described solids and zinc chloride is 0.5～2.Utilize zinc chloride to make solids form hole, make the solids of carbon containing synthesize nonvolatile polycondensation carbon, thereby produce the adsorbent of loose structure prosperity by effects such as dehydration, condensation, profit rise.So, adding activator, adsorbent can produce the porous of structure prosperity, and absorption property will improve.
Described activation temperature is 400～600 ℃, and the time is 1～2 hour.With this understanding, the activation of adsorbent reaches optimum adsorption effect.
Embodiment 1
Pulverization process is done to rice husk by a, elder generation, rice husk is delivered to carried out thermal cracking in the pyrocrack furnace then, and the thermal cracking temperature is 400 ℃, and the time is 5 seconds, and thermal cracking finishes the back and collects the solids that thermal cracking produces;
Under b, the oxygen free condition, add zinc chloride and carry out activation processing in the solids of collecting, wherein zinc oxide concentration is 15%, and the mass ratio of solids and zinc chloride is 0.5, and activation temperature is 400 ℃, and the time is 2 hours.
C, the solids of activated processing is filtered, and be washed with water to neutral high-efficiency adsorbent.
Embodiment 2
Pulverization process is done to rice husk by a, elder generation, rice husk is delivered to carried out thermal cracking in the pyrocrack furnace then, and the thermal cracking temperature is 600 ℃, and the time is 1 second, and thermal cracking finishes the back and collects the solids that thermal cracking produces;
Under b, the oxygen free condition, add zinc chloride and carry out activation processing in the solids of collecting, wherein zinc oxide concentration is 30%, and the mass ratio of solids and zinc chloride is 2, and activation temperature is 600 ℃, and the time is 1 hour.
C, the solids of activated processing is filtered, and be washed with water to neutral high-efficiency adsorbent.
Embodiment 3
Pulverization process is done to rice husk by a, elder generation, rice husk is delivered to carried out thermal cracking in the pyrocrack furnace then, and the thermal cracking temperature is 500 ℃, and the time is 3 seconds, and thermal cracking finishes the back and collects the solids that thermal cracking produces;
Under b, the oxygen free condition, add zinc chloride and carry out activation processing in the solids of collecting, wherein zinc oxide concentration is 25%, and the mass ratio of solids and zinc chloride is 1.2, and activation temperature is 500 ℃, and the time is 1.5 hours.
C, the solids of activated processing is filtered, and be washed with water to neutral high-efficiency adsorbent.
Measured through adsorption experiment by the high-efficiency adsorbent that above examples of implementation obtain, its I value is all greater than 900mg/g, and the methylene blue value is all greater than 90mg/g, and its adsorption effect is compared common active carbon and significantly improved.
Claims (5)
1. a pyrolysismethod is produced the method for high-efficiency adsorbent, may further comprise the steps:
A, rice husk delivered to carry out thermal cracking in the pyrocrack furnace, and collect the solids that thermal cracking produces;
Under b, the oxygen free condition, in the solids of collecting, add zinc salt and carry out activation processing;
C, the solids of activated processing is filtered, and washing is to neutral high-efficiency adsorbent.
2. a kind of pyrolysismethod according to claim 1 is produced the method for high-efficiency adsorbent, it is characterized in that: earlier rice husk was done pulverization process before rice husk is carried out thermal cracking.
3. a kind of pyrolysismethod according to claim 1 is produced the method for high-efficiency adsorbent, and it is characterized in that: described thermal cracking temperature is 400～600 ℃, and the time is 1～5 second.
4. a kind of pyrolysismethod according to claim 1 is produced the method for high-efficiency adsorbent, and it is characterized in that: described zinc salt is a zinc chloride, and zinc oxide concentration is 15～30%, and the mass ratio of described solids and zinc chloride is 0.5～2.
5. a kind of pyrolysismethod according to claim 1 is produced the method for high-efficiency adsorbent, and it is characterized in that: described activation temperature is 400～600 ℃, and the time is 1～2 hour.
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| CN 201110065054 CN102151558A (en) | 2011-03-17 | 2011-03-17 | Method for producing efficient absorbent by utilizing pyrolysis method |
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| CN 201110065054 CN102151558A (en) | 2011-03-17 | 2011-03-17 | Method for producing efficient absorbent by utilizing pyrolysis method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421524A (en) * | 2018-03-27 | 2018-08-21 | 天津大学 | A kind of carried non-crystal Mn oxide, preparation method and the usage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH589007A5 (en) * | 1973-05-04 | 1977-06-30 | Boehlen Bruno | Active carbon prodn. from organic polymers - by carbonisation in presence of zinc chloride |
| CN1319033A (en) * | 1998-09-23 | 2001-10-24 | 农业技术股份有限公司 | Highly activated carbon from caustic digestion of rice hull ash and method |
| CN1587036A (en) * | 2004-07-09 | 2005-03-02 | 华东理工大学 | Use of biomass cracking residual carbon |
| CN1876566A (en) * | 2006-03-24 | 2006-12-13 | 大连理工大学 | Microwave radiation method for preparing active carbon from biomass |
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2011
- 2011-03-17 CN CN 201110065054 patent/CN102151558A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH589007A5 (en) * | 1973-05-04 | 1977-06-30 | Boehlen Bruno | Active carbon prodn. from organic polymers - by carbonisation in presence of zinc chloride |
| CN1319033A (en) * | 1998-09-23 | 2001-10-24 | 农业技术股份有限公司 | Highly activated carbon from caustic digestion of rice hull ash and method |
| CN1587036A (en) * | 2004-07-09 | 2005-03-02 | 华东理工大学 | Use of biomass cracking residual carbon |
| CN1876566A (en) * | 2006-03-24 | 2006-12-13 | 大连理工大学 | Microwave radiation method for preparing active carbon from biomass |
Non-Patent Citations (1)
| Title |
|---|
| 《中南大学博士学位论文》 20100228 杨素文 "生物质真空热解液化制生物油及真空化学活化制活性炭研究" , * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421524A (en) * | 2018-03-27 | 2018-08-21 | 天津大学 | A kind of carried non-crystal Mn oxide, preparation method and the usage |
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Application publication date: 20110817 |