CN101985355A - Method and device for preparing activated carbon by using sludge - Google Patents
Method and device for preparing activated carbon by using sludge Download PDFInfo
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- CN101985355A CN101985355A CN2010105741308A CN201010574130A CN101985355A CN 101985355 A CN101985355 A CN 101985355A CN 2010105741308 A CN2010105741308 A CN 2010105741308A CN 201010574130 A CN201010574130 A CN 201010574130A CN 101985355 A CN101985355 A CN 101985355A
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Abstract
The invention discloses a method for preparing activated carbon by using sludge. The method comprises the following steps: proportionally adding an activating agent in dehydrated sludge containing about 80% of water for dipping and drying; feeding the mixture of the sludge and the activating agent in an activating device, wherein low-oxygen high-temperature smoke obtained by controlled oxygen combustion is adopted as an activating medium, the temperature is lower than 600 DEG C and the oxygen-containing amount is less than 4%; and washing and drying to prepare dried activated carbon, wherein the heat source used for drying the sludge after being dipped and drying the activated carbon after being activated and washed adopts high-temperature smoke after activation, and the temperature of the high-temperature smoke is generally lower than 500 DEG C. The invention also discloses a device for preparing the activated carbon by using sludge. The device comprises a mixed dipping kettle, a drier used after the sludge is dipped, a carbonization and activation device, a washing kettle and an activated carbon drier. In the invention, the low-oxygen high-temperature smoke serves as the activating medium and the dehydrated sludge is directly dipped, thereby simplifying the process of using the sludge to prepare the activated carbon, gradually using the heat energy of the high-temperature smoke according to grades and reducing the cost of using the sludge to prepare the activated carbon.
Description
Technical field
The present invention relates to the processing method that a kind of dewatered sludge prepares gac; relate in particular to a kind of utilize high-temperature flue gas as thermal source, activated media and protection gas will moisture 80% dewatered sludge directly prepare process of active carbon and device, with improve efficiency of energy utilization, reduction mud prepares the gac cost.
Background technology
Be accompanied by the fast development of global economy and the people growing interest to environment, sewage load increases at a high speed, has caused the rapid expansion of sludge yield.At present, China's annual discharging dewatered sludge is about 5,000,000 tons, and in continuous increase, as deal with improperly and can cause serious secondary pollution, the investment and the working cost of sludge treatment are huge simultaneously, account for 25%～65% of investment of entire sewage factory and working cost, become the heavy burden that sewage work faces.
Gac is as a kind of adsorption catalysis material; water insoluble and organic solvent; easily regeneration; organic or inorganic material in gas, the solution and colloidal solid etc. there is very strong adsorptive power; have enough chemical stabilities and acidproof, alkaline-resisting, thermotolerance, be used widely at numerous areas such as oil, chemical industry, food, light industry, national defence, environment protection.Containing more carbon in the mud, is that raw material can make carbon-bearing adsorbent by modification with mud under certain high temperature.The sorbent material that makes has very high COD clearance, it is a kind of treatment of Organic Wastewater agent of excellent property, adsorb saturated sorbent material if can not regenerate, can under control tail gas condition, burn, the injurious factor in the primary sludge is decomposed by exhaustive oxidation as fuel.
Existing chemical method mud prepares in the activated carbon process, and the dry earlier washing of dewatered sludge is flooded, with high temperature inert gas (CO again
2Or N
2) for the sludge carbonization activation provides heat, and as protection gas.So the pyritous rare gas element has both increased facility investment generally by adopting other fuel indirect heating to obtain, many again energy consumptions have increased the manufacturing cost of gac, and complex process has hindered the industrial applications that mud prepares gac.
The present invention is that about 80% dewatered sludge is a raw material with water ratio, and drying and direct impregnation adopts high-temperature low-oxygen stack gas for activated media and for the sludge carbonization activation provides required heat has not reduced the consumption of high-grade energy, has reduced running cost.Because flue gas has certain oxygen level, under the hot conditions, the oxygen of trace can reach the purpose of preoxidation mud, increases the Sludge Surface activity, promotes the quality of activated carbon product.
Summary of the invention
The mud that the invention provides a kind of economy, energy-saving and environmental protection prepares process of active carbon and device; utilize activated media, the protection gas of high-temperature low-oxygen flue gas as sludge carbonization; for the preoxidation of raw material provides oxygen part; and provide the thermal source of carbonization-activation; reduce the consumption of high-grade energy, the complicacy of technology and the manufacturing cost of active sludge carbon, improved the integration that rate of energy and mud prepare activated carbon system.
The present invention adopts following technical scheme:
A kind of dewatered sludge prepares the processing method of gac, and step is as follows:
Step 1 directly with after activator mixes, floods 10 ~ 24 hours by 10:1 ~ 4, is sent into moisture 75% ~ 85% wet mud drying machine and is carried out drying,
Step 2 is sent into carbonization activator and is activated, and activated media is control oxygen incendiary high-temperature low-oxygen flue gas, and oxygen level is less than 4%,
Send into the washing still after step 3 activation and carry out acid elution, dry then,
Step 4 is sent into the gac drying machine at last and is carried out drying, obtains the dry product gac.
A kind ofly implement the device that above-mentioned mud prepares gac, comprise the hybrid infusion still, drying machine behind the mud dipping, carbonization activator, the washing still, the gac drying machine, on carbonization activator, be provided with control oxygen incendiary high-temperature low-oxygen gas approach and activation back exhanst gas outlet, on mud dipping after drying machine and gac drying machine, establish the 1st activation back gas approach respectively, the 2nd activation back gas approach and the 1st dry back exhanst gas outlet, the 2nd dry back exhanst gas outlet, the exhanst gas outlet of carbonization activator respectively be located at mud dipping after drying machine and link to each other with the 1st activation back gas approach and the 2nd activation back gas approach on the gac drying machine, the 1st dry back exhanst gas outlet emptying on the mud dipping after drying machine and the 2nd dry back exhanst gas outlet emptying on the gac drying machine, the outlet of hybrid infusion still links to each other with the import of mud dipping after drying machine, the outlet of mud dipping after drying machine links to each other with the carbonization activator import, the carbonization activator outlet links to each other with the import of washing still, the outlet of washing still links to each other with the import of gac drying machine.
Compared with prior art, the present invention has the following advantages:
1, the present invention adopts flue gas as sludge carbonization activatory thermal source, and effectively utilizes the fume afterheat after the activation, has improved energy utilization rate, has reduced the cost that energy consumption and mud prepare gac.
Protection gas, activated media when 2, the present invention adopts the flue gas of high temperature low oxygen content to activate as sludge carbonization, the active sludge carbon manufacturing process has been simplified in the application of saving pure gas.
3, the present invention adopt low oxygen content flue gas for mud preoxidation provides the oxygen branch, make the surfactivity of mud granule increase, the easier feed particles inside that is deep into of activation makes the prosperity of gac hole.
4, the present invention's water ratio is that about 80% dewatered sludge directly prepares gac, saves the dry link when mud prepared gac in the past, has reduced energy consumption, has simplified active sludge carbon preparation technology.
5, the present invention has simplified the active sludge carbon manufacturing process, and system is highly integrated, simple to operateization.
6, the gac safety of prepared of the present invention, stable, pollution-free makes mud really reach the requirement of stabilization, innoxious, resource utilization.
Description of drawings:
Fig. 1 is the processing method that dewatered sludge of the present invention prepares gac.
Among Fig. 1,1, dipping still 2, mud dipping after drying machine 3, carbonization activator 4, washing still 5, gac drying machine.
Embodiment
Embodiment 1:
A kind of dewatered sludge prepares the processing method of gac, and step is as follows:
Step 1 directly with after activator mixes, floods 10 ~ 24 hours by 10:1 ~ 4, is sent into moisture about 80% wet mud drying machine and is carried out drying,
Step 2 is sent into carbonization activator and is activated, and activated media is control oxygen incendiary high-temperature low-oxygen flue gas,
Send into the washing still after step 3 activation and carry out acid elution, dry then,
Step 4 is sent into the gac drying machine at last and is carried out drying, obtains the dry product gac.
Embodiment 2
A kind ofly implement the device that above-mentioned mud prepares gac, comprise hybrid infusion still 1, drying machine 2 behind the mud dipping, carbonization activator 3, washing still 4, gac drying machine 5, on carbonization activator 3, be provided with control oxygen incendiary high-temperature low-oxygen gas approach and activation back exhanst gas outlet, on mud dipping after drying machine 2 and gac drying machine 5, establish the 1st activation back gas approach respectively, the 2nd activation back gas approach and the 1st dry back exhanst gas outlet, the 2nd dry back exhanst gas outlet, the exhanst gas outlet of carbonization activator 3 respectively be located at mud dipping after drying machine 2 and link to each other with the 1st activation back gas approach and the 2nd activation back gas approach on the gac drying machine 5, the 1st dry back exhanst gas outlet emptying on the mud dipping after drying machine 2 and the 2nd dry back exhanst gas outlet emptying on the gac drying machine 5,1 outlet of hybrid infusion still links to each other with 2 imports of mud dipping after drying machine, 2 outlets of mud dipping after drying machine link to each other with carbonization activator 3 imports, carbonization activator 3 outlets link to each other with 4 imports of washing still, 4 outlets of washing still link to each other with 5 imports of gac drying machine.
With reference to the accompanying drawings, the present invention is made more detailed explanation:
With reference to Fig. 1, the wet mud of a kind of 80% dehydration directly prepares the device of gac, comprise hybrid infusion still 1, drying machine 2 behind the mud dipping, carbonization activator 3, washing still 4, gac drying machine 5, on carbonization activator 3, be provided with control oxygen incendiary high-temperature low-oxygen gas approach and activation back exhanst gas outlet, on mud dipping after drying machine 2 and gac drying machine 5, establish the 1st activation back gas approach respectively, the 2nd activation back gas approach and the 1st dry back exhanst gas outlet, the 2nd dry back exhanst gas outlet, the exhanst gas outlet of carbonization activator 3 respectively be located at mud dipping after drying machine 2 and link to each other with the 1st activation back gas approach and the 2nd activation back gas approach on the gac drying machine 5, the 1st dry back exhanst gas outlet emptying on the mud dipping after drying machine 2 and the 2nd dry back exhanst gas outlet emptying on the gac drying machine 5,1 outlet of hybrid infusion still links to each other with 2 imports of mud dipping after drying machine, 2 outlets of mud dipping after drying machine link to each other with carbonization activator 3 imports, carbonization activator 3 outlets link to each other with 4 imports of washing still, 4 outlets of washing still link to each other with 5 imports of gac drying machine.
(activation under the oxygen free condition) is that 80% municipal sludge is sent in the dipping still 1, with ZnCl with water ratio
2Be activator; press the wet mud of impregnating ratio 5:1(: activator) mud was flooded 16 hours in dipping still 1; mud oven dry after 500 ℃ the stack gas waste heat that adopts part to activate will flood in drying machine 2; send into subsequently in the carbonization activator 3 with nitrogen as protection gas; under anoxia condition, carry out carbonization-activation; control sludge activation temperature is 550 ℃, and soak time is 90 minutes.With after scouring, oven dry, obtain the dry product gac, its specific surface area is 493.1m
2/ g, methylene blue adsorption value are 120.1mg/g.
(under the aerobic conditions, oxygen level 2%) is that 80% municipal sludge is sent in the dipping still 1, with ZnCl with water ratio
2Be activator, press the wet mud of impregnating ratio 5:1(: activator) mud was flooded 16 hours in dipping still 1, mud oven dry after 500 ℃ the stack gas waste heat that adopts part to activate will flood in drying machine 2, send into subsequently in the carbonization activator 3 and to adopt that oxygen level is 2%, temperature is that 600 ℃ high-temperature low-oxygen flue gas carries out carbonization-activation, control sludge activation temperature is 550 ℃, and soak time is 90 minutes.With after scouring, and with the oven dry of 500 ℃ that activated stack gas waste heat, obtain the dry product gac, its specific surface area is 516.1m
2/ g, methylene blue adsorption value are 129.8mg/g, and pore volume is 0.29cm
3/ g, micro pore volume are 0.16cm
3/ g, mean pore size is 3.95nm.
(under the aerobic conditions, oxygen level 4%) is that 80% municipal sludge is sent in the dipping still 1, with ZnCl with water ratio
2Be activator, press the wet mud of impregnating ratio 5:1(: activator) mud was flooded 16 hours in dipping still 1, mud oven dry after 500 ℃ the stack gas waste heat that adopts part to activate will flood in drying machine 2, send into subsequently in the carbonization activator 3 and to adopt that oxygen level is 4%, temperature is that 600 ℃ high-temperature low-oxygen flue gas carries out carbonization-activation, control sludge activation temperature is 550 ℃, and soak time is 90 minutes.With after scouring, and with the oven dry of 500 ℃ that activated stack gas waste heat, obtain the dry product gac, its specific surface area is 512.8m
2/ g, methylene blue adsorption value are 129.1mg/g.
Oxygen can with carbon skeleton surface group generation oxidizing reaction, promote the formation and the development of activated carbon capillary.But when too high oxygen level, Sauerstoffatom and carbon skeleton surface group speed of response are exceedingly fast, many oxygen molecules have little time to be diffused into the charcoal granule interior at all and just react with surface group, the formation and the development of micropore have been limited, simultaneously, also make established micropore wall be burnt, widen, gac specific surface area and micro pore volume can decline to a great extent with the increase of oxygen level, the absorption property variation.
Claims (3)
1. a mud prepares process of active carbon, it is characterized in that step is as follows:
Step 1 directly with after activator mixes, floods 10 ~ 24 hours by the mass ratio of 10:1 ~ 4, is sent into moisture 75% ~ 85% wet mud drying machine and is carried out drying,
Step 2 is sent into carbonization activator and is activated, and activated media is control oxygen incendiary high-temperature low-oxygen flue gas,
Send into the washing still after step 3 activation and carry out acid elution, dry then,
Step 4 is sent into the gac drying machine at last and is carried out drying, obtains the dry product gac.
2. mud according to claim 1 prepares process of active carbon, it is characterized in that, the used activated media of step 3 is that temperature is 450 ~ 650 ℃, oxygen content less than 4% control oxygen incendiary high-temperature low-oxygen flue gas, and the drying medium of step 1 and step 4 is the flue gas from the carbonization activator outlet.
3. implement claim 1 for one kind, 2 described mud prepare the device of active carbon method, it is characterized in that, comprise hybrid infusion still (1), drying machine (2) behind the mud dipping, carbonization activator (3), washing still (4), gac drying machine (5), on carbonization activator (3), be provided with control oxygen incendiary high-temperature low-oxygen gas approach and activation back exhanst gas outlet, on mud dipping after drying machine (2) and gac drying machine (5), establish the 1st activation back gas approach respectively, the 2nd activation back gas approach and the 1st dry back exhanst gas outlet, the 2nd dry back exhanst gas outlet, the exhanst gas outlet of carbonization activator (3) respectively be located at mud dipping after drying machine (2) and gac drying machine (5) on the 1st activation back gas approach and the 2nd activation after gas approach link to each other, the 1st dry back exhanst gas outlet emptying on the mud dipping after drying machine (2) and the 2nd dry back exhanst gas outlet emptying on the gac drying machine (5), hybrid infusion still (1) outlet links to each other with the import of mud dipping after drying machine (2), mud dipping after drying machine (2) outlet links to each other with carbonization activator (3) import, carbonization activator (3) outlet links to each other with the import of washing still (4), washing still (4) outlet links to each other with gac drying machine (5) import.
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| CN2010105741308A CN101985355B (en) | 2010-12-06 | 2010-12-06 | Method and device for preparing activated carbon by using sludge |
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|---|---|---|---|
| CN2010105741308A CN101985355B (en) | 2010-12-06 | 2010-12-06 | Method and device for preparing activated carbon by using sludge |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267695A (en) * | 2011-07-25 | 2011-12-07 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
| CN103769190A (en) * | 2014-01-27 | 2014-05-07 | 华南理工大学 | Method for preparing auto-doping carbon catalytic material of fuel cell by using excess sludge |
| CN105314807A (en) * | 2015-02-28 | 2016-02-10 | 南京万德斯环保科技有限公司 | Sludge disposal and utilization method based on cyclone drying and coupling pyrolysis technology |
| CN106927462A (en) * | 2017-04-24 | 2017-07-07 | 句容市百诚活性炭有限公司 | A kind of preparation method of active sludge carbon |
| CN107720749A (en) * | 2017-10-28 | 2018-02-23 | 洛阳建材建筑设计研究院有限公司 | A kind of apparatus and method that activated carbon and haydite are produced using sludge |
| CN111056552A (en) * | 2019-12-30 | 2020-04-24 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| CN114293364A (en) * | 2022-01-28 | 2022-04-08 | 华北电力大学（保定） | Carbon fiber activation method and apparatus |
| CN111056552B (en) * | 2019-12-30 | 2024-04-19 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
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| CN101391766A (en) * | 2008-10-21 | 2009-03-25 | 广西大学 | Method for preparing active carbon from pulping paper mill sludge |
| CN101423212A (en) * | 2008-11-25 | 2009-05-06 | 邹炎 | Method for preparing sludge active carbon by using sludge and sludge active carbon |
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| CN101391766A (en) * | 2008-10-21 | 2009-03-25 | 广西大学 | Method for preparing active carbon from pulping paper mill sludge |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267695A (en) * | 2011-07-25 | 2011-12-07 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
| CN102267695B (en) * | 2011-07-25 | 2012-10-17 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
| CN103769190A (en) * | 2014-01-27 | 2014-05-07 | 华南理工大学 | Method for preparing auto-doping carbon catalytic material of fuel cell by using excess sludge |
| CN105314807A (en) * | 2015-02-28 | 2016-02-10 | 南京万德斯环保科技有限公司 | Sludge disposal and utilization method based on cyclone drying and coupling pyrolysis technology |
| CN106927462A (en) * | 2017-04-24 | 2017-07-07 | 句容市百诚活性炭有限公司 | A kind of preparation method of active sludge carbon |
| CN107720749A (en) * | 2017-10-28 | 2018-02-23 | 洛阳建材建筑设计研究院有限公司 | A kind of apparatus and method that activated carbon and haydite are produced using sludge |
| CN107720749B (en) * | 2017-10-28 | 2023-09-19 | 洛阳建材建筑设计研究院有限公司 | Device and method for producing activated carbon and ceramsite by using sludge |
| CN111056552A (en) * | 2019-12-30 | 2020-04-24 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| CN111056552B (en) * | 2019-12-30 | 2024-04-19 | 广东职业技术学院 | Automatic treatment system for converting printing and dyeing sludge into activated carbon |
| CN114293364A (en) * | 2022-01-28 | 2022-04-08 | 华北电力大学（保定） | Carbon fiber activation method and apparatus |
| CN114293364B (en) * | 2022-01-28 | 2023-09-26 | 华北电力大学（保定） | Carbon fiber activation method and equipment |
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