CN101708840A - Activated coke prepared by lignitous coal for flue gas desulfurization and preparation method thereof - Google Patents
Activated coke prepared by lignitous coal for flue gas desulfurization and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a method for preparing activated coke for flue gas desulfurization by utilizing lignitous coal independently, which comprises the following steps: preparing the lignitous coal into semi-coke powder of the lignitous coal; adding 20 to 40 mass percent of agglomerant and water which accounts for 0 to 25 percent of total mass of the semi-coke powder of the lignitous coal and the agglomerant into 60 to 80 mass percent of semi-coke powder of the lignitous coal for kneading to prepare coal paste; extruding the coal paste to form a molding material, and performing aging or pre-oxidation treatment on the molding material; carbonizing the molding material after the aging or pre-oxidation treatment; activating the carbonized material to form an activated material so as to prepare the activated coke for flue gas desulfurization. The invention also relates to the activated coke for flue gas desulfurization applied to lignitous coal equipment. The method utilizes the lignitous coal with low additional value to prepare large granular activated coke products special for flue gas desulfurization, which has the advantages of low production cost, excellent quality, obviously improved desulfurization effect, and large market competitiveness.
Description
Technical field
The present invention relates to a kind of activated coke and preparation method thereof, relate in particular to a kind of flue gas desulfurization activated coke and preparation method thereof, belong to material preparation and coal chemical technology by the brown coal preparation.
Background technology
Activated coke is a kind of particulate matter with sorbent material and the dual performance of catalyzer, and it has the characteristics of gac, and absorption and catalytic performance are good, and stable chemical performance can be regenerated, and can reuse.Simultaneously, it has overcome shortcomings such as gac price height, physical strength are low, easy pulverizing again.In ambient water, gas Pollution abatement field, replace gac with activated coke, have more practical meaning.
The research of making the macrobead gac be used for heat power plant's flue gas dry desulfurizing special use and activated coke in recent years is in the ascendant, and has formed multiple production technique at home and abroad.Germany BF company adopts the brown coal abrasive dust is added the tackiness agent moulding again, forms the lignite semi-coke powder through charing and is used further to heat power plant's dry desulfurization device.Through abrasive dust, mix with coal tar then after China's Shanxi Xinhua Chemical Plant usefulness bituminous coal and the coking coal proportioning, be shaped to strip particle, make the smoke gas treatment activated coke through charing, activation, oxidation then by liquefaction.Applicant discloses a kind of method of mainly utilizing brown coal to prepare activated coke for desulfuration in number of patent application is 200910300277.5 " coal-based activated coke for desulfuration and preparation method thereof ", activated coke by this method preparation has the heavily increase of same volume (volume) heap, intensity is good, wear-resistant, the characteristics of long service life, but need in this method to adopt fine hard coal and brown coal to carry out coal blending earlier, carry out following process again and make activated coke, yet high-quality anthracite, particularly the unordered exploitation of Taixi anthracite causes being used for preparing the minimizing of coal mass active carbon/Jiao's feed coal, makes that the relative manufacturing cost of activated coke that makes is higher.
Summary of the invention
Technical problem to be solved by this invention is the continuous expansion at the market requirement, high-quality anthracite, particularly the unordered exploitation of Taixi anthracite causes being used for preparing the minimizing of coal mass active carbon/Jiao's feed coal, make and the higher deficiency of the relative manufacturing cost of activated coke that makes provide flue gas desulfurization activated coke and preparation method thereof that a kind of sweetening effectiveness is good and production cost is low by the brown coal preparation.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of flue gas desulfurization preparation method of activated coke by the brown coal preparation, and this method may further comprise the steps:
Step 1: brown coal are made the lignite semi-coke powder;
Step 2: get 60%～80% lignite semi-coke powder by mass percentage, add mass percent therein and be 20%～40% binding agent and account for the lignite semi-coke powder and the water of binding agent total mass 0%～25% after mediate to handle and make coal cream;
Step 3: described coal cream pushed be formed into moulding mixture, and described molding mass is carried out ageing or pre-oxidation treatment;
Step 4: the molding mass after ageing or the pre-oxidation treatment is carried out charing handle the formation carbonized material;
Step 5: described carbonized material is carried out activation treatment form activated material, promptly be prepared into the flue gas desulfurization activated coke.
The invention has the beneficial effects as follows: adopt above-mentioned flue gas desulfurization by brown coal preparations can utilize low value-added brown coal with the preparation method of activated coke; prepare activated coke production cost at present both at home and abroad on average reduce by 30～50%, best in quality, significant desulfurization effect improves, have the special-purpose macrobead activated coke of the flue gas desulfurization product of the market competitiveness, has opened up the new approach that utilizes of brown coal.
Further, the brown coal in the described step 1 are low-ash high quality brown coal, and its ash oontent is 2%～20%; The volatile matter of the described lignite semi-coke powder that makes is controlled at 3%～25%, and ash control is 4%～25%.
Further, the binding agent in the described step 2 is a coal-tar heavy oil.
Further, lignite semi-coke powder, binding agent and water carried out proportioning after, under 50 ℃～80 ℃, mediate, the kneading time is 8 minutes～45 minutes.
Further, in the described step 3 with coal cream after extruding under the pressure of 12 MPas～100 MPas is formed into moulding mixture, ageing or under 150 ℃～350 ℃, molding mass is carried out pre-oxidation treatment under field conditions (factors).
Further, in the described step 4 molding mass after the ageing or after the preoxidation is put into internal heat type charing rotary kiln or external-heat charing rotary kiln and carry out the charing processing.
Further, the temperature that described charing is handled is controlled at 500 ℃～750 ℃, and carbonization time is controlled to be 15 minutes～and 80 minutes.
Further, the carbonized material in the described step 5 is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace, adopts superheated vapour to carry out activation treatment and forms activated material.
Further, the temperature of described activation treatment is controlled at 750 ℃～1000 ℃, and soak time is controlled to be 20 minutes～and 90 minutes.
On the basis of technique scheme, the present invention can also do following improvement: a kind ofly use the flue gas desulfurization activated coke that above-mentioned flue gas desulfurization by brown coal preparations prepares with the preparation method of activated coke.
The invention has the beneficial effects as follows: the present invention has adopted low value-added brown coal to prepare the activated coke that flue gas desulfurization is used, and has opened up the new coal that is suitable for making activated coke; The activated coke product bulk density that makes simultaneously is moderate, physical strength good, good in oxidation resistance, effectively sweetening effectiveness is good, is the activated coke product that a kind of ideal desulfurization is used.
Embodiment
Below principle of the present invention and feature are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Brown coal matter activated coke for desulfuration preparation method of the present invention may further comprise the steps:
Step 10: brown coal are made the lignite semi-coke powder.
In this step, can earlier brown coal be broken into coal cinder, make lignite semi-coke 300 ℃～800 ℃ following destructive distillation after 60 minutes～180 minutes then, again the lignite semi-coke that makes be ground to form 170 orders～325 purpose lignite semi-coke powder less than 30 centimetres.
In this step, also can earlier brown coal be broken into coal cinder, then coal cinder be ground to form 170 orders～325 purpose brown coal powders, again the brown coal powder that makes be made the lignite semi-coke powder 300 ℃～800 ℃ following destructive distillation after 60 minutes～180 minutes less than 30 centimetres.
Described brown coal are low-ash high quality brown coal, and its ash oontent is 2%～20%.The volatile matter of the described lignite semi-coke powder that makes is controlled at 3%～25%, and ash control is 4%～25%.
Step 20: get 60%～80% lignite semi-coke powder by mass percentage, add mass percent therein and be 20%～40% binding agent and account for the lignite semi-coke powder and the water of binding agent total mass 0%～25% after mediate to handle and make coal cream.
Described binding agent is a coal-tar heavy oil, adopt horizontal or vertical kneader that lignite semi-coke powder, binding agent and water are carried out proportioning after, under 50 ℃～80 ℃, mediate, the kneading time is 8 minutes～45 minutes.Described binding agent is a coal-tar heavy oil.Described lignite semi-coke powder and coal-tar heavy oil can add entry and mediate after mixing, and also can not add water and directly mediate, and this depends primarily on moisture and bituminous content in the coal-tar heavy oil.
Step 30: described coal cream pushed be formed into moulding mixture, and described molding mass is carried out ageing or pre-oxidation treatment.
With coal cream after extruding under the pressure of 12 MPas～100 MPas is formed into moulding mixture, on the ground that under the physical environment temperature molding mass is placed on builder's temporary shed natural ageing or 150 ℃～350 ℃ down heating carry out pre-oxidation treatment.Described molding mass can be that other is irregularly shaped for column, spherical shape, walnut shape, hollow cylindrical etc.If described molding mass is column, hollow cylindrical, its diameter is 3 millimeters～12 millimeters.If described molding mass is spherical shape, walnut shape or irregularly shaped, its particle diameter is 3 millimeters～12 millimeters.
Step 40: the molding mass after ageing or the pre-oxidation treatment is carried out charing handle the formation carbonized material.
Then the molding mass after the ageing or after the preoxidation is put into internal heat type charing rotary kiln or external-heat charing rotary kiln and carried out the charing processing.The temperature that described charing is handled is controlled at 500 ℃～750 ℃, and carbonization time is controlled to be 15 minutes～and 80 minutes.
Described step 40 can also be sieved to handle after forming carbonized material and be removed underproof carbonized material, more qualified carbonized material is carried out next step processing, to improve the quality that activated coke is used in the flue gas desulfurization that obtains at last.Described carbonized material can be that other is irregularly shaped for column, spherical shape, walnut shape, hollow cylindrical etc.If described carbonized material is column, hollow cylindrical, qualified carbonized material is meant that its diameter is 3 millimeters～12 millimeters.If described carbonized material is spherical shape, walnut shape or irregularly shaped, qualified carbonized material is meant that its particle diameter is 3 millimeters～12 millimeters.
Step 50: described carbonized material is carried out activation treatment form activated material, promptly be prepared into the flue gas desulfurization activated coke.
Carbonized material is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace, is that 150 ℃～500 ℃ superheated vapour is passed into and in the activation furnace carbonized material is carried out activation treatment and form activated material with temperature.The activation temperature of described internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace is controlled at 750 ℃～1000 ℃, and soak time is controlled to be 20 minutes～and 90 minutes.Described step 50 can also be sieved to handle after forming activated material and be removed underproof activated material, more qualified activated material is packed pack, to improve the quality that activated coke is used in the flue gas desulfurization that obtains at last.
By the brown coal matter activated coke for desulfuration of above-mentioned flue gas desulfurization by brown coal preparations with preparation method's preparation of activated coke, described activated coke can be that other is irregularly shaped for column, spherical shape, walnut shape, hollow cylindrical etc.If described activated coke is column, hollow cylindrical, its diameter is 3 millimeters～12 millimeters, and preferably, its diameter can be the activated coke of 5 millimeters or 9 millimeters.If described activated coke is spherical shape, walnut shape or irregularly shaped, its particle diameter is 3 millimeters～12 millimeters, and preferably, its particle diameter can be the activated coke of 5 millimeters or 9 millimeters.
Divide nine embodiment that the present invention is done further detailed description by the flue gas desulfurization of brown coal preparation with the preparation method of activated coke below.
Embodiment one:
At first, brown coal are broken into coal cinder less than 30 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 300 ℃ of following destructive distillation after 150 minutes, wear into 180 purpose lignite semi-coke powder then, the ash content 3% of described brown coal, the volatilization of described lignite semi-coke powder is divided into 24%, and ash content is 5%; Secondly, get 60% lignite semi-coke powder and 40% coal tar by mass percentage, mediate 15min down at 50 ℃ and handle and make coal cream; Once more, coal cream after cylindric sketching charcoal is made in extrusion molding under the pressure of 15 MPas, is carried out ageing, and handle 40min 600 ℃ of following charings; Then, carbonized material after the activation treatment of carrying out 60min under 800 ℃ forms activated material, is sieved processing and is divided into the different activated material of diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment two:
At first, brown coal are broken into coal cinder less than 10 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 500 ℃ of following destructive distillation after 120 minutes, wear into 180 purpose lignite semi-coke powder then, the ash content of described brown coal is 6%, and the volatilization of described lignite semi-coke powder is divided into 3%, and ash content is 16%; Secondly, getting 65% lignite semi-coke by mass percentage, to add mass percent be 35% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 3%, mediates 8min down at 60 ℃ and handle and make coal cream; Once more, coal cream after the straight circular cylinder type sketching charcoal is made in extrusion molding under the pressure of 18 MPas, is carried out preoxidation in 200 ℃, and handle 55min 730 ℃ of following charings; Then, carbonized material after the activation treatment of carrying out 38min under 950 ℃ forms activated material, is sieved processing and is divided into the different activated material of diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment three:
At first, brown coal are broken into coal cinder less than 20 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 800 ℃ of following destructive distillation after 35 minutes, wear into 250 purpose lignite semi-coke powder then, the ash content of described brown coal is 12%, and the volatilization of described lignite semi-coke powder is divided into 4%, and ash content is 20%; Secondly, get 68% lignite semi-coke by mass percentage, adding mass percent is 32% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 7%, and kneading 45min handles and makes coal cream under 62 ℃; Once more, coal cream, is carried out ageing, and handles 65min 675 ℃ of following charings after to make particle diameter be 12 millimeters spherical shape charcoal ball in extrusion molding under the pressure of 33 MPas; Then, carbonized material after the activation treatment of carrying out 45min under 850 ℃ forms activated material, is sieved and handles the activated material that is divided into different-grain diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment four:
At first, brown coal are broken into coal cinder less than 25 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 650 ℃ of following destructive distillation after 180 minutes, wear into 180 purpose lignite semi-coke powder then, the ash content of described brown coal is 18%, and the volatilization of described lignite semi-coke powder is divided into 3%, and ash content is 25%; Secondly, get 70% lignite semi-coke by mass percentage, adding mass percent is 30% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 15%, and kneading 30min handles and makes coal cream under 65 ℃; Once more, coal cream after cylindric sketching charcoal is made in extrusion molding under the pressure of 17 MPas, is carried out preoxidation under 250 ℃, and handle 55min 750 ℃ of following charings; Then, the carbonized material after the charing is sieved processing and remove the carbonized material of diameter less than 7mm; At last, above-mentioned carbonized material after the activation treatment of carrying out 40min under 1000 ℃ forms activated material, is sieved and handles the activated material that is divided into different diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment five:
At first, brown coal are broken into coal cinder less than 30 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 400 ℃ of following destructive distillation after 80 minutes, wear into 270 purpose lignite semi-coke powder then, the ash content of described brown coal is 3%, and the volatilization of described lignite semi-coke powder is divided into 18%, and ash content is 6%; Secondly, get 78% lignite semi-coke by mass percentage, adding mass percent is 22% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 15%, and kneading 35min handles and makes coal cream under 75 ℃; Once more, peach-pit shape charcoal piece is made in the extrusion molding under the pressure of 45 MPas of coal cream, carried out ageing, and handle 45min 500 ℃ of following charings; Then, carbonized material after the activation treatment of carrying out 50min under 900 ℃ forms activated material, is sieved and handles the activated material that is divided into different-grain diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment six:
At first, brown coal are broken into coal cinder less than 15 centimetres; Then, the brown coal after the fragmentation are worn into 325 purpose coal dusts, make the lignite semi-coke powder after 70 minutes 450 ℃ of following destructive distillation then, the ash content of described brown coal is 14%, and the volatilization of described lignite semi-coke powder is divided into 15%, and ash content is 16%; Secondly, get 80% lignite semi-coke by mass percentage, adding mass percent is 20% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 15%, and kneading 45min handles and makes coal cream under 65 ℃; Once more, coal cream after cylindric sketching charcoal is made in extrusion molding under the pressure of 65 MPas, is carried out ageing, and handle 60min 600 ℃ of following charings; Then, the carbonized material after the charing is sieved handle to remove diameter less than 10 millimeters carbonized material; At last, above-mentioned carbonized material sieves to handle and removes underproof activated material after the activation treatment of carrying out 35min under 750 ℃ forms activated material, promptly is prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment seven:
At first, brown coal are broken into coal cinder less than 10 centimetres; Then, the brown coal after the fragmentation are worn into 230 purpose coal dusts, make the lignite semi-coke powder after 70 minutes 750 ℃ of following destructive distillation then, the ash content of described brown coal is 2%, and the volatilization of described lignite semi-coke powder is divided into 8%, and ash content is 4%; Secondly, get 75% lignite semi-coke by mass percentage, adding mass percent is 25% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 7%, and kneading 18min handles and makes coal cream under 68 ℃; Once more, coal cream after the hollow columnar sketching charcoal is made in extrusion molding under the pressure of 35 MPas, is carried out preoxidation under 350 ℃, and handle 30min 600 ℃ of following charings; Then, qualified carbonized material after the activation treatment of carrying out 90min under 1000 ℃ forms activated material, is sieved and handles the activated material that is divided into different diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment eight:
At first, brown coal are broken into coal cinder less than 10 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 380 ℃ of following destructive distillation after 60 minutes, wear into 200 purpose lignite semi-coke powder then, the ash content of described brown coal is 5%, and the volatilization of described lignite semi-coke powder is divided into 25%, and ash content is 6%; Secondly, get 74% lignite semi-coke by mass percentage, adding mass percent is 26% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 25%, and kneading 15min handles and makes coal cream under 75 ℃; Once more, coal cream after cylindric sketching charcoal is made in extrusion molding under the pressure of 30 MPas, is carried out ageing, and handle 20min 750 ℃ of following charings; Then, qualified carbonized material after the activation treatment of carrying out 30min under 850 ℃ forms activated material, is sieved processing and is divided into the different activated material of diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Embodiment nine:
At first, brown coal are broken into coal cinder less than 20 centimetres; Then, the brown coal after the fragmentation are made lignite semi-coke 750 ℃ of following destructive distillation after 90 minutes, wear into 170 purpose lignite semi-coke powder then, the ash content of described brown coal is 10%, and the volatilization of described lignite semi-coke powder is divided into 3%, and ash content is 25%; Secondly, get 80% lignite semi-coke by mass percentage, adding mass percent is 20% coal tar and the water that accounts for lignite semi-coke and coal tar total mass 12%, and kneading 24min handles and makes coal cream under 78 ℃; Once more, coal cream after cylindric sketching charcoal is made in extrusion molding under the pressure of 12 MPas, is carried out ageing, and handle 20min 500 ℃ of following charings; Then, the carbonized material after the charing is sieved handle to remove diameter less than 5 millimeters carbonized material; At last, above-mentioned carbonized material after the activation treatment of carrying out 20min under 950 ℃ forms activated material, is sieved and handles the activated material that is divided into different diameter, promptly be prepared into qualified brown coal matter activated coke for desulfuration.
Table 1 is the above The performance test results of passing through the activated coke for desulfuration of nine embodiment preparations.Need to prove that among above-mentioned 9 embodiment, parallel revision test, results averaged are all carried out in test three times.Activated coke for desulfuration by technical scheme provided by the invention preparation has that same volume (volume) heap is heavy moderate, and ash content is moderate, and intensity is good, and is wear-resistant, Sulfur capacity height, good in oxidation resistance, the characteristics of long service life.
Its performance index of activated coke sample for the present invention's preparation adopt except that Sulfur capacity outside the MT/T998-2006 standard, and other index serves as to detect according to carrying out the correlated performance index with the GB/T7702.1-7702.22-1997 standard all.
Table 1 is by the The performance test results of the activated coke for desulfuration of nine embodiment preparations
| The embodiment numbering | Heaping weight g/L | Iodine number mgg -1 | Ultimate compression strength N/cm 2 | Abrasive wear resistance % | Sulfur capacity % | Point of ignition ℃ | Ash content % |
| ??1 | ??522 | ??501 | ??398 | ??98.4 | ??18.3 | ??428 | ??13.7 |
| ??2 | ??620 | ??733 | ??444 | ??98.6 | ??17.9 | ??400 | ??14.8 |
| ??3 | ??548 | ??461 | ??900 | ??99.1 | ??25.7 | ??420 | ??15.6 |
| ??4 | ??478 | ??433 | ??459 | ??96.9 | ??19.7 | ??410 | ??18.0 |
| ??5 | ??454 | ??537 | ??388 | ??94.7 | ??21.2 | ??425 | ??8.6 |
| ??6 | ??438 | ??543 | ??365 | ??94.0 | ??19.8 | ??400 | ??19.8 |
| ??7 | ??545 | ??808 | ??301 | ??93.9 | ??28.8 | ??430 | ??15.7 |
| ??8 | ??512 | ??442 | ??406 | ??97.0 | ??16.2 | ??415 | ??18.1 |
| ??9 | ??439 | ??413 | ??645 | ??95.1 | ??14.9 | ??425 | ??17.3 |
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included in protection scope of the present invention it.
Claims (10)
1. one kind by the flue gas desulfurization of the brown coal preparations preparation method with activated coke, it is characterized in that this method may further comprise the steps:
Step 1: brown coal are made the lignite semi-coke powder;
Step 2: get 60%～80% lignite semi-coke powder by mass percentage, add mass percent therein and be 20%～40% binding agent and account for the lignite semi-coke powder and the water of binding agent total mass 0%～25% after mediate to handle and make coal cream;
Step 3: described coal cream pushed be formed into moulding mixture, and described molding mass is carried out ageing or pre-oxidation treatment;
Step 4: the molding mass after ageing or the pre-oxidation treatment is carried out charing handle the formation carbonized material;
Step 5: described carbonized material is carried out activation treatment form activated material, promptly be prepared into the flue gas desulfurization activated coke.
2. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke is characterized in that the brown coal in the described step 1 are low-ash high quality brown coal, and its ash oontent is 2%～20%; The volatile matter of the described lignite semi-coke powder that makes is controlled at 3%～25%, and ash control is 4%～25%.
3. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke is characterized in that the binding agent in the described step 2 is a coal-tar heavy oil.
4. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke, it is characterized in that, after in the described step 2 lignite semi-coke powder, binding agent and water being carried out proportioning, mediate under 50 ℃～80 ℃, the kneading time is 8 minutes～45 minutes.
5. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke, it is characterized in that, in the described step 3 with coal cream after extruding under the pressure of 12 MPas～100 MPas is formed into moulding mixture, ageing or under 150 ℃～350 ℃, molding mass is carried out pre-oxidation treatment under field conditions (factors).
6. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke, it is characterized in that, in the described step 4 molding mass after the ageing or after the preoxidation is put into internal heat type charing rotary kiln or external-heat charing rotary kiln and carry out the charing processing.
7. the flue gas desulfurization by brown coal preparations according to claim 6 is characterized in that with the preparation method of activated coke the temperature that described charing is handled is controlled at 500 ℃～750 ℃, carbonization time is controlled to be 15 minutes～and 80 minutes.
8. the flue gas desulfurization by the brown coal preparation according to claim 1 preparation method of activated coke, it is characterized in that, carbonized material in the described step 5 is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace, adopts superheated vapour to carry out activation treatment and forms activated material.
9. the flue gas desulfurization by brown coal preparations according to claim 8 is characterized in that with the preparation method of activated coke the temperature of described activation treatment is controlled at 750 ℃～1000 ℃, soak time is controlled to be 20 minutes～and 90 minutes.
10. an application rights requires the flue gas desulfurization activated coke that 1～9 arbitrary described flue gas desulfurization by the brown coal preparation prepares with the preparation method of activated coke.
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| CN102491323A (en) * | 2011-11-29 | 2012-06-13 | 山西新华化工有限责任公司 | Method for preparing activated coke having high desulfurization activity |
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