CN103880007B - Utilize gac or activated coke and preparation facilities thereof and method prepared by oily sludge - Google Patents
Utilize gac or activated coke and preparation facilities thereof and method prepared by oily sludge Download PDFInfo
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- CN103880007B CN103880007B CN201410152789.2A CN201410152789A CN103880007B CN 103880007 B CN103880007 B CN 103880007B CN 201410152789 A CN201410152789 A CN 201410152789A CN 103880007 B CN103880007 B CN 103880007B
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- flue gas
- gac
- activated coke
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- temperature flue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The present invention provide a kind of utilize oily sludge to prepare gac or activated coke, it is made up of group part of following weight part: oily sludge 15-45 part, carbonaceous material 30-60 part, adjusting material 15-35 part; Wherein, described carbonaceous material is the mixture of one or more in bituminous coal, hard coal, coking coal and charcoal, and described adjusting material at least comprises the one in following component: pitch, tar, resin, starch. Oily sludge in the present invention belongs to the regeneration of waste, decreases the generation of industrial refuse, and also for the preparation method of the process of waste, gac or activated coke provides a full technical strategies, other raw materials are also wide material sources, cheap.
Description
Technical field
The present invention relates to chemical field, particularly relate to composition and its preparation method of a kind of gac or activated coke.
Background technology
At present, along with the progress of science and technology, the amount of the oily sludge of petrochemical industry discharge gets more and more, excess sludge discharges in a large number, pollute environment, the discharge how reducing oily sludge becomes the big difficult problem of puzzlement petrochemical industry technician, the oily sludge that oily sludge is different with common, the features such as oily sludge has oleaginousness height, temperature height, contained sewage sludge viscosity is big, mobility is poor, emulsification is serious. Prior art adopt usually biological treatment, ozone, chlorine oxidation process remove COD technology, but because condensed oil sewage complicated component, all do not reach better effects, as adopted big tank precipitation technology, then cost is too high, management also has difficulties, and therefore, how oily sludge being carried out advanced treatment and to be recycled is problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of utilize oily sludge to prepare gac or activated coke, its cost is low, result of use good.
Present invention also offers the preparation facilities of a kind of described gac or activated coke and method, described device and method are simple, and well by heat recovery, the running cost of equipment can be significantly reduced, reach object that is energy-conservation and minimizing high-temperature gas discharge simultaneously.
Utilize gac or an activated coke prepared by oily sludge, it be made up of group part of following weight part:
Oily sludge 15-45 part, carbonaceous material 30-60 part, adjusting material 15-35 part; Wherein, described carbonaceous material is the mixture of one or more in bituminous coal, hard coal, coking coal and charcoal, and described adjusting material at least comprises the one in following component: pitch, tar, resin, starch.
Of the present invention utilize oily sludge to prepare gac or activated coke, wherein said oily sludge is the waste of petrochemical industry; Described carbonaceous material is fineness is 200-325 object powder, fixed carbon content >=60% wherein, described carbonaceous material be following several in one: mass ratio is the bituminous coal of 7:3 and the mixture of coking coal, mass ratio is the charcoal of 7:3 and the mixture of coking coal, and mass ratio is the hard coal of 8:2 and the mixture of bituminous coal.
Of the present invention utilize oily sludge to prepare gac or activated coke, wherein said pitch is the coal tar pitch of softening temperature more than 80 DEG C, described tar is coal tar, asphalt content >=50% in described coal tar, water-content≤10%, described resin is resol, and described starch is yam starch.
Of the present invention utilize oily sludge to prepare gac or activated coke, wherein said adjusting material to be mass ratio the be pitch of 1:9 and the mixture of tar or mass ratio be the resin of 4:1 and the mixture of starch.
The device of a kind of gac for the preparation of utilizing oily sludge to prepare or activated coke, kneading machine, tablets press, dryer, charring furnace and the activation furnace comprising incinerator, waste heat boiler, gas cleaning integrating device and be connected successively by pipeline, described dryer is provided with oven dry smoke inlet, described charring furnace is provided with flammable exhanst gas outlet, described activation furnace is provided with the first high-temperature flue gas outlet and steam-in;
Being provided with flammable smoke inlet and the outlet of the 2nd high-temperature flue gas on described incinerator, described flammable smoke inlet is connected with described flammable exhanst gas outlet; Described waste heat boiler is provided with the first high-temperature flue gas entry, the 2nd high-temperature flue gas entry, vapour outlet and third high temperature exhanst gas outlet, described first high-temperature flue gas entry is connected with the first high-temperature flue gas outlet, described 2nd high-temperature flue gas entry is connected with described 2nd high-temperature flue gas outlet, and described vapour outlet is connected with described steam-in; Described gas cleaning integrating device is provided with third high temperature smoke inlet and the outlet of the 4th high-temperature flue gas, described third high temperature smoke inlet is connected with described third high temperature exhanst gas outlet, described 4th high-temperature flue gas outlet is connected with fume emission pipeline, it is provided with induced draft fan, the outlet of described induced draft fan is also connected with the oven dry smoke inlet of described dryer by drying flue gas pipeline, and described oven dry flue gas pipeline is provided with gas blower.
Device of the present invention, also comprises the oily sludge test tank, carbonaceous material test tank and the adjusting material test tank that are connected with described kneading machine respectively by pipeline.
Adopt device of the present invention to prepare the method for gac or activated coke, comprise the steps:
Step one, prepare raw material in proportion, and raw material is carried out pre-treatment, comprising: the pre-treatment of oily sludge: after ageing dehydration in 60 hours, adopt belt press filtration or plate and frame press filtration to dewater further; The pre-treatment of carbonaceous material: pulverize, wear into 200-325 object powder; The pre-treatment of adjusting material: in proportion by the pitch after thawing, tar, resin and starch mixing;
Step 2, all raw materials through pre-treatment are dropped in kneading machine adopt granulator granulation after kneading, dry in dryer after in the charring furnace of 400-600 DEG C dry distillation charring, activated stove obtains product after 700-1200 DEG C of activation treatment again, as in raw material containing hard coal then as described in product be gac, as raw material is made up of one or more in other raw materials except hard coal, then described product is activated coke;
Wherein, make in destructive distillation process produce can enter in incinerator by burning fume, flue gas is led in waste heat boiler after the combustiblesubstance in combustion product gases by described incinerator, flue gas is led in smoke eliminator after utilizing the heat in flue gas by described waste heat boiler, simultaneously, the steam that described waste heat boiler produces enters in described activation furnace, the high-temperature flue gas that described activation furnace produces returns the recycling that described waste heat boiler carries out heat, described flue gas integrated purification device dries flue gas by being formed after the waste heat recovery in flue gas, described oven dry flue gas is drawn by induced draft fan, wherein the oven dry flue gas of 80～90% is to airborne release, the oven dry flue gas of residue 10～20% enters in described dryer by gas blower, the waste heat of flue gas is for described dryer, by the drying materials after described granulation.
The present invention utilizes gac prepared by oily sludge or activated coke difference from prior art to be: the present invention utilizes the waste oily sludge of petrochemical industry to prepare gac or activated coke, oily sludge belongs to the regeneration of waste, decrease the generation of industrial refuse, also it is the process of waste, the preparation method of gac or activated coke provides a full technical strategies, other raw materials are also wide material sources, cheap, " oily sludge 15-45 part, carbonaceous material 30-60 part, adjusting material 15-35 part " Proportionality design can save while raw material, prepare the product cost low, the external crack produced and macropore enrich, result of use is good, create economic benefit.
Device and method of the present invention is adopted to carry out the preparation of gac or activated coke, simple, with the addition of incinerator, waste heat boiler and flue gas integrated purification device, and these three devices are combined with original device, it is designed to the gas circuit of a circulation, the heat that each link produces can be recycled well, significantly reduces the running cost of equipment, reaches object that is energy-conservation and minimizing high-temperature gas discharge simultaneously.
Below in conjunction with accompanying drawing, preparation facilities and the method for the gac of the present invention or activated coke are described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device preparing gac or activated coke of the present invention.
Embodiment
Embodiment 1
Utilize gac or an activated coke prepared by oily sludge, it is made up of group part of following weight part: oily sludge 15 parts, carbonaceous material 60 parts, adjusting material 35 parts; Wherein, carbonaceous material is the mixture of one or more in bituminous coal, hard coal, coking coal and charcoal, and adjusting material at least comprises the one in following component: pitch, tar, resin, starch.
Preferably, oily sludge is the waste of petrochemical industry; Carbonaceous material is fineness is 200-325 object powder, fixed carbon content >=60% wherein, and carbonaceous material is mass ratio is the bituminous coal of 7:3 and the mixture of coking coal. Pitch is the coal tar pitch of softening temperature more than 80 DEG C, and tar is coal tar, asphalt content >=50% in coal tar, water-content≤10%, and resin is resol, and starch is yam starch. Adjusting material is mass ratio is the pitch of 1:9 and the mixture of tar.
Embodiment 2
Utilize gac or an activated coke prepared by oily sludge, it is made up of group part of following weight part: oily sludge 45 parts, carbonaceous material 30 parts, adjusting material 15 parts; Wherein, carbonaceous material is the mixture of one or more in bituminous coal, hard coal, coking coal and charcoal, and adjusting material at least comprises the one in following component: pitch, tar, resin, starch.
Preferably, oily sludge is the waste of petrochemical industry; Carbonaceous material is fineness is 200-325 object powder, fixed carbon content >=60% wherein, and carbonaceous material is mass ratio is the charcoal of 7:3 and the mixture of coking coal. Pitch is the coal tar pitch of softening temperature more than 80 DEG C, and tar is coal tar, asphalt content >=50% in coal tar, water-content≤10%, and resin is resol, and starch is yam starch. Adjusting material is mass ratio is the resin of 4:1 and the mixture of starch.
Embodiment 3
Utilize gac or an activated coke prepared by oily sludge, it is made up of group part of following weight part: oily sludge 28 parts, carbonaceous material 45 parts, adjusting material 22 parts;Wherein, carbonaceous material is the mixture of one or more in bituminous coal, hard coal, coking coal and charcoal, and adjusting material at least comprises the one in following component: pitch, tar, resin, starch.
Preferably, oily sludge is the waste of petrochemical industry; Carbonaceous material is fineness is 200-325 object powder, fixed carbon content >=60% wherein, and carbonaceous material is mass ratio is the hard coal of 8:2 and the mixture of bituminous coal. Pitch is the coal tar pitch of softening temperature more than 80 DEG C, and tar is coal tar, asphalt content >=50% in coal tar, water-content≤10%, and resin is resol, and starch is yam starch. Adjusting material is mass ratio is the pitch of 1:9 and the mixture of tar.
Embodiment 4
As shown in Figure 1, a kind of for the preparation of the device of gac in the present invention or activated coke, kneading machine 1, tablets press 5, dryer 14, charring furnace 6 and the activation furnace 7 comprising incinerator 8, waste heat boiler 9, gas cleaning integrating device 10 and be connected successively by pipeline, dryer 14 is provided with and dries smoke inlet 141, charring furnace 6 is provided with flammable exhanst gas outlet 601, activation furnace 7 is provided with the first high-temperature flue gas outlet 701 and steam-in 702; Being provided with flammable smoke inlet 801 and the 2nd high-temperature flue gas outlet 802 on described incinerator 8, flammable smoke inlet 801 is connected with flammable exhanst gas outlet 601; Described waste heat boiler 9 is provided with the first high-temperature flue gas entry 903, the 2nd high-temperature flue gas entry 901, vapour outlet 904 and third high temperature exhanst gas outlet 902, first high-temperature flue gas entry 903 is connected with the first high-temperature flue gas outlet 701,2nd high-temperature flue gas entry 901 is connected with the 2nd high-temperature flue gas outlet 802, and vapour outlet 904 is connected with steam-in 702; Described gas cleaning integrating device 10 is provided with third high temperature smoke inlet 101 and the 4th high-temperature flue gas outlet 102, third high temperature smoke inlet 101 is connected with third high temperature exhanst gas outlet 902,4th high-temperature flue gas outlet 102 is connected with fume emission pipeline 15, it is provided with induced draft fan 11, the outlet of induced draft fan 11 is also connected with the oven dry smoke inlet 141 of dryer 14 by drying flue gas pipeline 13, dries and is provided with gas blower 12 on flue gas pipeline 13.
The preparation being enough to realize on the basis of energy-conserving and environment-protective product by above device, on this basis, it is preferred that device also comprises the oily sludge test tank 2, carbonaceous material test tank 3 and the adjusting material test tank 4 that are connected with kneading machine 1 respectively by pipeline.
Adopt the device of the present invention to prepare the method for gac or activated coke, comprise the steps:
Step one, prepare raw material in proportion, and raw material is carried out pre-treatment, comprising: the pre-treatment of oily sludge: after ageing dehydration in 60 hours, adopt belt press filtration or plate and frame press filtration to dewater further; The pre-treatment of carbonaceous material: pulverize, wear into 200-325 object powder; The pre-treatment of adjusting material: in proportion by the pitch after thawing, tar, resin and starch mixing;
Step 2, all raw materials through pre-treatment are dropped in kneading machine 1 adopt tablets press 5 granulation, drying machine 14 drying after kneading after in the charring furnace 6 of 400-600 DEG C dry distillation charring, activated stove 7 obtains product after 700-1200 DEG C of activation treatment again, as in raw material containing hard coal then product be gac, as raw material is made up of one or more in other raw materials except hard coal, then product is activated coke;
Wherein, make in destructive distillation process produce can enter in incinerator 8 by burning fume, in incinerator 8, after the combustiblesubstance in combustion product gases, flue gas leads in waste heat boiler 9, flue gas is led in flue gas integrated purification device 10 after making waste heat boiler 9 utilize the heat in flue gas, simultaneously, the steam that waste heat boiler 9 produces enters in activation furnace 7, the high-temperature flue gas that activation furnace 7 produces returns the recycling that waste heat boiler 9 carries out heat, flue gas integrated purification device 10 dries flue gas by being formed after the waste heat recovery in flue gas, dry flue gas to draw by induced draft fan 11, wherein the oven dry flue gas of 80～90% is to airborne release, the oven dry flue gas of residue 10～20% is led in dryer 14 by gas blower 12, by the waste heat (80～150 DEG C) of oven dry flue gas for dryer 14, make the drying materials after granulation, save the equipment of oven dry separately, save cost.
Above embodiment is only the preferred embodiment of the present invention be described; not the scope of the present invention is limited; under the prerequisite not departing from inventive design spirit; the various distortion that the technical scheme of the present invention is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention is determined.
Claims (3)
1. one kind for the preparation of the device of gac or activated coke, it is characterized in that: comprise incinerator (8), waste heat boiler (9), gas cleaning integrating device (10) and the kneading machine (1) being connected successively by pipeline, tablets press (5), dryer (14), charring furnace (6) and activation furnace (7), described dryer (14) is provided with and dries smoke inlet (141), described charring furnace (6) is provided with flammable exhanst gas outlet (601), described activation furnace (7) is provided with the first high-temperature flue gas outlet (701) and steam-in (702),
Being provided with flammable smoke inlet (801) and the 2nd high-temperature flue gas outlet (802) on described incinerator (8), described flammable smoke inlet (801) is connected with described flammable exhanst gas outlet (601), described waste heat boiler (9) is provided with the first high-temperature flue gas entry (903), the 2nd high-temperature flue gas entry (901), vapour outlet (904) and third high temperature exhanst gas outlet (902), described first high-temperature flue gas entry (903) exports (701) with the first high-temperature flue gas and is connected, described 2nd high-temperature flue gas entry (901) is connected with described 2nd high-temperature flue gas outlet (802), and described vapour outlet (904) is connected with described steam-in (702), described gas cleaning integrating device (10) is provided with third high temperature smoke inlet (101) and the 4th high-temperature flue gas outlet (102), described third high temperature smoke inlet (101) is connected with described third high temperature exhanst gas outlet (902), described 4th high-temperature flue gas outlet (102) is connected with fume emission pipeline (15), it is provided with induced draft fan (11), the outlet of described induced draft fan (11) is also connected with the oven dry smoke inlet (141) of described dryer (14) by drying flue gas pipeline (13), described oven dry flue gas pipeline (13) is provided with gas blower (12).
2. according to claim 1 for the preparation of the device of gac or activated coke, it is characterised in that: also comprise the oily sludge test tank (2), carbonaceous material test tank (3) and the adjusting material test tank (4) that are connected with described kneading machine (1) respectively by pipeline.
3. adopt and prepare gac or the method for activated coke for the preparation of the device of gac or activated coke described in claim 1 or 2, it is characterised in that: comprise the steps:
Step one, prepare raw material in proportion, and raw material is carried out pre-treatment, comprising: the pre-treatment of oily sludge: after ageing dehydration in 60 hours, adopt belt press filtration or plate and frame press filtration to dewater further; The pre-treatment of carbonaceous material: pulverize, wear into 200-325 object powder; The pre-treatment of adjusting material: in proportion by the pitch after thawing, tar, resin and starch mixing;
Step 2, all raw materials through pre-treatment are dropped in kneading machine (1) adopt tablets press (5) granulation, dryer (14) dry after kneading after in the charring furnace (6) of 400-600 DEG C dry distillation charring, activated stove (7) obtains product after 700-1200 DEG C of activation treatment again, as in raw material containing hard coal then as described in product be gac, as raw material is made up of one or more in other raw materials except hard coal, then described product is activated coke;
Wherein, make in destructive distillation process produce can enter in incinerator (8) by burning fume, flue gas is led to after the combustiblesubstance in combustion product gases in waste heat boiler (9) by described incinerator (8), flue gas is led to into gas cleaning integrating device (10) after making described waste heat boiler (9) utilize the heat in flue gas, simultaneously, the steam that described waste heat boiler (9) produces enters in described activation furnace (7), the high-temperature flue gas that described activation furnace (7) produces returns the recycling that described waste heat boiler (9) carries out heat, described gas cleaning integrating device (10) dries flue gas by being formed after the waste heat recovery in flue gas, described oven dry flue gas is drawn by induced draft fan (11), wherein the oven dry flue gas of 80～90% is to airborne release, the oven dry flue gas of residue 10～20% enters in described dryer (14) by gas blower (12), by the waste heat of oven dry flue gas for described dryer (14), make the drying materials after described granulation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410152789.2A CN103880007B (en) | 2014-04-16 | 2014-04-16 | Utilize gac or activated coke and preparation facilities thereof and method prepared by oily sludge |
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| CN201410152789.2A CN103880007B (en) | 2014-04-16 | 2014-04-16 | Utilize gac or activated coke and preparation facilities thereof and method prepared by oily sludge |
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| CN103880007A CN103880007A (en) | 2014-06-25 |
| CN103880007B true CN103880007B (en) | 2016-06-15 |
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Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104118876A (en) * | 2014-08-06 | 2014-10-29 | 山东山大能源环境有限公司 | Active coke used for flue gas desulfurization as well as preparation method and device of active coke |
| CN105170127A (en) * | 2015-09-30 | 2015-12-23 | 黎城蓝天燃气开发有限公司 | In-place regenerating activating furnace, system and method for saturated active carbon |
| CN106746470B (en) * | 2017-02-09 | 2020-09-11 | 中国石油大学(华东) | Oily sludge drying and burning integrated treatment process |
| CN106693833A (en) * | 2017-03-14 | 2017-05-24 | 江苏奥能耐火材料有限公司 | High-temperature environment-friendly and energy-saving granulating system containing aldehydes and other toxic additives and granulating method thereof |
| CN107188386A (en) * | 2017-07-17 | 2017-09-22 | 北京建筑大学 | A kind of method that utilization sewage plant excess sludge prepares charcoal |
| CN107601804A (en) * | 2017-09-12 | 2018-01-19 | 中国石油天然气集团公司 | A kind of method that self-heating moulding oily sludge pyrolysis prepares adsorbent |
| CN110845097A (en) * | 2018-07-24 | 2020-02-28 | 维欧（天津）能源技术服务有限公司 | Reduction and recycling treatment process for oily sludge and preparation method thereof |
| CN109319780A (en) * | 2018-11-07 | 2019-02-12 | 宁夏翔泰新材料科技有限公司 | A method of producing the activated coke added without coal tar using upright carbonization furnace |
| CN110078073A (en) * | 2019-04-26 | 2019-08-02 | 宁夏廷远活性炭有限公司 | A kind of active carbon |
| CN110822438B (en) * | 2019-11-07 | 2021-10-26 | 光大环保技术研究院（南京）有限公司 | Waste incineration power generation system and method |
| CN110655076A (en) * | 2019-11-15 | 2020-01-07 | 山西新华化工有限责任公司 | Production process for preparing activated carbon from sludge |
| CN111320996B (en) * | 2020-03-10 | 2021-06-08 | 西北化工研究院有限公司 | Device and process for preparing co-production oil gas by using oily sludge-based activated coke |
| CN111514877B (en) * | 2020-04-14 | 2022-07-01 | 太原理工大学 | CH preparation by utilizing dangerous waste resources such as petrochemical sludge4+CO2Method for reforming catalyst |
| CN112429730B (en) * | 2020-11-06 | 2023-02-03 | 中冶南方都市环保工程技术股份有限公司 | Active coke prepared by using active coke abraded waste coke and preparation method thereof |
| CN112408388A (en) * | 2020-11-11 | 2021-02-26 | 中冶南方都市环保工程技术股份有限公司 | Preparation method of activated coke with high denitration performance |
| CN112456489A (en) * | 2020-11-11 | 2021-03-09 | 中冶南方都市环保工程技术股份有限公司 | Preparation method of active coke |
| CN112479206A (en) * | 2020-11-20 | 2021-03-12 | 中冶南方都市环保工程技术股份有限公司 | Preparation method of high-performance active coke for flue gas purification |
| CN114192555A (en) * | 2021-10-11 | 2022-03-18 | 北京清新环境技术股份有限公司 | Method for recycling and comprehensively utilizing high-carbon-content hazardous solid wastes, product and application thereof |
| CN113772671B (en) * | 2021-10-27 | 2024-03-29 | 西安交通大学 | Improved coal-based activated carbon and preparation method and application thereof |
| CN114873594A (en) * | 2022-05-06 | 2022-08-09 | 山东海普欧环保设备科技有限公司 | Method for preparing activated carbon from sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101423212B (en) * | 2008-11-25 | 2010-12-22 | 邹炎 | Method for preparing sludge active carbon by using sludge and sludge active carbon |
| 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 |
| CN103553040B (en) * | 2013-11-15 | 2015-06-17 | 中国石油大学(华东) | Method for preparing porous carbon through co-pyrolysis of petroleum coke and oily sludge |
| CN203866042U (en) * | 2014-04-16 | 2014-10-08 | 邹炎 | Device for preparing activated carbon or activated coke |
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