CN102139874A - Small granular active coke prepared from brown coal and preparation method of active coke - Google Patents
Small granular active coke prepared from brown coal and preparation method of active coke Download PDFInfo
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- CN102139874A CN102139874A CN2010103010755A CN201010301075A CN102139874A CN 102139874 A CN102139874 A CN 102139874A CN 2010103010755 A CN2010103010755 A CN 2010103010755A CN 201010301075 A CN201010301075 A CN 201010301075A CN 102139874 A CN102139874 A CN 102139874A
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Abstract
The invention relates to a preparation method of small granular active coke for desulfurization, denitration and demercuration of flue gas by singly using brown coal. The preparation method comprises the following steps: crushing the brown coal; carbonizing the crushed brown coal so as to remove most moisture, and reducing the volatile of the brown coal so as to obtain brown coal semicoke; further activating the brown coal semicoke; and crushing the activated material to form powders with a certain specification, namely the small granulate active coke prepared from the brown coal. The invention also relates to applications of the small granular active coke prepared from the brown coal in the aspects of the desulfurization, denitration and demercuration of the flue gas. In the preparation method, the brown coal with a low additional value is used for preparing the small granular active coke product which has the advantages of low production cost, good quality, obvious desulfurization effect and strong market competitiveness, and is used for the desulfurization, denitration and demercuration of the flue gas.
Description
Technical field
The present invention relates to a kind of fine granularity activated coke and preparation method thereof, relate in particular to a kind of flue gas desulfurization, denitration and demercuration, belong to material preparation and coal chemical technology with fine granularity activated coke and preparation method thereof by the brown coal preparation.
Background technology
At present, Wet technique is adopted in gas cleaning both at home and abroad mostly, but the wet type flue gas desulphurization technology is applied and is restricted in few water area such as some areas, particularly northwest at home.The activated coke desulfurization technology is a kind of advanced person's a dry flue gas desulphurization purification techniques.Mostly adopt at present the sorbent material of macrobead column activated coke product as the active coke dry-method desulfuration purification techniques.
This patent is the continuity of a series of activated coke patent applications of the applicant; applicant discloses a kind of brown coal that mainly utilize and has prepared the method for desulfurization with the fine granularity activated coke in number of patent application is 200910300277.5 " coal-based desulfurization with fine granularity activated coke and preparation method thereof "; fine granularity 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; simultaneously in application number is 200910224054.5 " special-purpose macrobead activated coke of brown coal tobacco curing qi exhaustion sulphur and preparation method thereof " a kind of method of utilizing brown coal to prepare activated coke is separately disclosed; the activated coke cost of this method preparation is low; intensity is good; wear-resistant, etc. characteristics.But above-mentioned activated coke all belongs to macrobead class flue gas desulfurization activated coke product, generally is applied to large-scale fixed bed or moving-bed device, and it is because need to add the higher binding agent of cost in process of production, and production technique is complicated, and production cost is higher relatively.
Summary of the invention
The objective of the invention is to adopt brown coal is raw material, and low cost production is a kind of to can be applicable to the fine granularity activated coke that flue gas desulfurization, denitration and demercuration are used.
The present invention is that the achieve the above object technical scheme that adopts is as follows: a kind of preparation method of the fine granularity activated coke by the brown coal preparation, and this method may further comprise the steps:
Step 1, brown coal are broken into fritter;
Step 2, lignite semi-coke is made in the brown coal piece charing after the fragmentation;
Step 3, lignite semi-coke is carried out activation treatment obtain activated material;
Step 4, activated material is pulverized, and sieved, obtain the fine granularity activated coke of different grain size requirement, promptly be prepared into the different flue gas desulfurization of the specification trade mark, denitration and demercuration fine granularity activated coke.
The invention has the beneficial effects as follows: adopt above-mentioned flue gas desulfurization, denitration and demercuration by brown coal preparations can utilize low value-added brown coal with the preparation method of fine granularity activated coke, not adding binding agent, without any Chemical Pretreatment and aftertreatment technology.Produce the fine granularity activated coke in this way, can save burden process, shortened process and time, reduce facility investment, further reduce the production cost of activated coke, fast with its rate of adsorption of fine granularity activated coke that above-mentioned preparation method produces, the desulfuration efficiency height, and possess effect simultaneously to denitrating flue gas and demercuration.
Further, the brown coal in the described step 1 are low-ash high quality brown coal, and its ash oontent is≤15%, are broken into particle diameter less than 25 centimetres fritter.
Further, the temperature that the brown coal charing prepares lignite semi-coke in the described step 2 is controlled at 200 ℃～750 ℃, and carbonization time is controlled to be 1 hour～and 25 hours.
Further, the lignite semi-coke in the described step 3 is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace or rake formula stove, adopts superheated vapour to carry out activation treatment and forms activated material.
Further, activation temperature is controlled at 750 ℃～1000 ℃ in the described step 3, and soak time is controlled to be 0.5 hour～and 3 hours.
Further, sieve after in the described step 4 activated material being pulverized, the fine granularity activated coke that obtains comprises that granularity is less than or equal to 5 purpose activated coke.
Further, described fine granularity activated coke comprises the activated coke of five kinds of size ranges, wherein, ≤ 325 purpose content are 5%～10%, 325 orders～200 purpose content are 10%～20%, 200 orders～100 purpose content are that 10%～30%, 100 orders～40 purpose content are that 5%～30% and 40 orders～5 purpose content are 5%～30%.
On the basis of technique scheme, the present invention can also do following improvement: a kind of fine granularity activated coke of using preparation method's preparation of above-mentioned fine granularity activated coke by brown coal preparations, it is characterized in that, described fine granularity activated coke is used for flue gas desulfurization, denitration and demercuration, and it comprises that granularity is less than or equal to 5 purpose activated coke.
Further, described fine granularity activated coke comprises the activated coke of five kinds of size ranges, wherein, ≤ 325 purpose content are 5%～10%, 325 orders～200 purpose content are 10%～20%, 200 orders～100 purpose content are that 10%～30%, 100 orders～40 purpose content are that 5%～30% and 40 orders～5 purpose content are 5%～30%.
Further, described fine granularity activated coke is used for flue gas desulfurization, denitration and demercuration, and its saturated Sulfur capacity is 15%～38%, iodine number is at 300mg/g～700mg/g, point of ignition is at 300 ℃～450 ℃, and denitration efficiency is 10%～60%, and demercuration efficient is 40%～95%.
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.
This preparation method may further comprise the steps:
Step 10, brown coal are broken into particle diameter less than 25 centimetres coal cinder.
Described brown coal are low-ash high quality brown coal, and its ash oontent is≤15%.
Step 20, the coal cinder after the fragmentation handled 200 ℃～750 ℃ following charings obtained lignite semi-coke in 1 hour～25 hours.
Most moisture in the coal cinder that can remove after the fragmentation is handled in described charing, thereby obtains the lignite semi-coke that volatile matter reduces.The volatile matter of lignite semi-coke is controlled at≤and 20%, moisture controlled is≤10%.
Step 30, lignite semi-coke is carried out activation treatment obtain activated material.
Lignite semi-coke is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace or rake formula stove, is that 150 ℃～500 ℃ superheated vapour is passed into and in the activation furnace lignite semi-coke 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 or rake formula stove is controlled at 750 ℃～1000 ℃, and soak time is controlled to be 0.5 hour～and 3 hours.
Step 40: activated material is pulverized, and sieved, the fine granularity activated coke that obtains the different grain size requirement is also packed respectively, promptly is prepared into the fine granularity activated coke that flue gas desulfurization, denitration and demercuration are used.
Sieve after activated material pulverized, the fine granularity activated coke that obtains comprises that granularity is less than or equal to 5 purpose activated coke.Described fine granularity activated coke can comprise that granularity is less than or equal to the activated coke of arbitrary granularity in the 5 order scopes, preferably include≤325 orders, 325 orders～200 orders, 200 orders～100 orders, the activated coke of a kind of size range or several size ranges in 100 orders～40 orders and 40 orders～five kinds of size ranges of 5 orders, more preferably, described fine granularity activated coke comprises the activated coke of above-mentioned five kinds of size ranges, wherein, ≤ 325 purpose content are 5%～10%, 325 orders～200 purpose content are 10%～20%, 200 orders～100 purpose content are that 10%～30%, 100 orders～40 purpose content are that 5%～30% and 40 orders～5 purpose content are 5%～30%.Described fine granularity activated coke is used for flue gas desulfurization, denitration and demercuration, and its saturated Sulfur capacity is 15%～38%, and iodine number is at 300mg/g～700mg/g, and point of ignition is at 300 ℃～450 ℃, and denitration efficiency is 10%～60%, and demercuration efficient is 40%～95%.
Embodiment 1:
At first, brown coal are broken into particle diameter less than 25 centimetres coal cinder; Then, the brown coal after the fragmentation are made lignite semi-coke 300 ℃ of following charings after 15 hours, then lignite semi-coke is sent into external-heating revolving activation furnace, activate 0.6 hour down, make activated material at 1000 ℃; Then activated material is carried out fragmentation, then the activated material after the fragmentation is sieved, obtain varigrained fine granularity activated coke, wherein≤325 purpose accounts for 8.7%, 325 orders～200 purposes account for 14.8%, 200 order～100 purposes and account for 27.5%, 100 order～80 orders and account for 19.0%, 40 orders are 30% to 5 purpose content, promptly prepare qualified finished product desulfurization, denitration and demercuration activated coke product.The saturated Sulfur capacity 15%～23% of fine granularity activated coke of above-mentioned implementation column preparation, iodine number 350mg/g～400mg/g, 330 ℃～380 ℃ at point of ignition, denitration efficiency 22%～47%, demercuration efficient 46%～89%.
Embodiment two:
At first, brown coal are broken into particle diameter less than 25 centimetres coal cinder; Then, the brown coal after the fragmentation are made lignite semi-coke 500 ℃ of following charings after 8 hours, then lignite semi-coke is sent into the internal heat type revolving activation furnace, activate 1 hour down, make activated material at 850 ℃; Then activated material is carried out fragmentation, then the activated material after the fragmentation is sieved, obtain varigrained fine granularity activated coke, wherein≤325 purpose accounts for 5.4%, 325 orders～200 purposes account for 16.9%, 200 order～100 purposes and account for 28.6%, 100 order～40 orders and account for 21.1%, 40 orders account for 28% to 5 purpose content, promptly prepare qualified finished product desulfurization, denitration and demercuration activated coke product.The saturated Sulfur capacity 17%～29% of fine granularity activated coke of above-mentioned implementation column preparation, iodine number 450mg/g～510mg/g, 350 ℃～420 ℃ at point of ignition.Denitration efficiency 15%～55%, demercuration efficient 65%～93%.
Embodiment three:
At first, brown coal are broken into particle diameter less than 25 centimetres coal cinder; Then, the brown coal after the fragmentation are made lignite semi-coke 750 ℃ of following charings after 1 hour, then lignite semi-coke is sent into Stepple furnace, activate 3 hours down, make activated material at 760 ℃; Then activated material is carried out fragmentation, then the activated material after the fragmentation is sieved, obtain varigrained fine granularity activated coke, wherein≤325 purpose accounts for 12.9%, 325 orders～200 purposes account for 18.7%, 200 order～100 purposes and account for 29.5%, 100 order～40 orders and account for 26.3%, 40 orders account for 12.6% to 5 purposes, promptly prepare qualified finished product desulfurization, denitration and demercuration activated coke product.The saturated Sulfur capacity 25%～35% of fine granularity activated coke of above-mentioned implementation column preparation, iodine number 550mg/g～680mg/g, 370 ℃～430 ℃ at point of ignition.Denitration efficiency 31%～58%, demercuration efficient 71%～95%.
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. preparation method by the fine granularity activated coke of brown coal preparations is characterized in that this method may further comprise the steps:
Step 1, brown coal are broken into fritter;
Step 2, lignite semi-coke is made in the brown coal piece charing after the fragmentation;
Step 3, lignite semi-coke is carried out activation treatment obtain activated material;
Step 4, activated material is pulverized, and sieved, obtain the fine granularity activated coke of different grain size requirement and pack respectively, promptly be prepared into the fine granularity activated coke that the different flue gas desulfurization of the specification trade mark, denitration and demercuration are used.
2. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 1 is characterized in that the brown coal in the described step 1 are low-ash high quality brown coal, and its ash oontent is≤15%, is broken into particle diameter less than 25 centimetres fritter.
3. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 1 is characterized in that, the temperature that the brown coal charing prepares lignite semi-coke in the described step 2 is controlled at 200 ℃～750 ℃, carbonization time is controlled to be 1 hour～and 25 hours.
4. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 1, it is characterized in that, lignite semi-coke in the described step 3 is put into internal heat type activation rotary kiln or external-heat activation rotary kiln or Stepple furnace or rake formula stove, adopts superheated vapour to carry out activation treatment and forms activated material.
5. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 1 is characterized in that activation temperature is controlled at 750 ℃～1000 ℃ in the described step 3, soak time is controlled to be 0.5 hour～and 3 hours.
6. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 1, it is characterized in that, sieve after in the described step 4 activated material being pulverized, the fine granularity activated coke that obtains comprises that granularity is less than or equal to 5 purpose activated coke.
7. the preparation method of the fine granularity activated coke by brown coal preparations according to claim 6, it is characterized in that, described fine granularity activated coke comprises the activated coke of five kinds of size ranges, wherein, ≤ 325 purpose content are 5%～10%, 325 orders～200 purpose content are that 10%～20%, 200 orders～100 purpose content are that 10%～30%, 100 orders～40 purpose content are that 5%～30% and 40 orders～5 purpose content are 5%～30%.
8. an application rights requires the fine granularity activated coke of preparation method's preparation of 1～7 arbitrary described fine granularity activated coke by the brown coal preparation, it is characterized in that, described fine granularity activated coke is used for flue gas desulfurization, denitration and demercuration, and it comprises that granularity is less than or equal to 5 purpose activated coke.
9. the fine granularity activated coke of preparation method's preparation of the described according to Claim 8 fine granularity activated coke by brown coal preparations, it is characterized in that, described fine granularity activated coke comprises the activated coke of five kinds of size ranges, wherein, ≤ 325 purpose content are 5%～10%, 325 orders～200 purpose content are that 10%～20%, 200 orders～100 purpose content are that 10%～30%, 100 orders～40 purpose content are that 5%～30% and 40 orders～5 purpose content are 5%～30%.
10. the fine granularity activated coke of preparation method's preparation of the described according to Claim 8 fine granularity activated coke by brown coal preparations, it is characterized in that, described fine granularity activated coke is used for flue gas desulfurization, denitration and demercuration, its saturated Sulfur capacity is 15%～38%, iodine number is at 300mg/g～700mg/g, point of ignition is at 300 ℃～450 ℃, and denitration efficiency is 10%～60%, and demercuration efficient is 40%～95%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693805A (en) * | 2013-12-02 | 2014-04-02 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN104229793A (en) * | 2014-09-12 | 2014-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Brown coal active coke and preparation method thereof |
| CN105776208A (en) * | 2016-04-06 | 2016-07-20 | 府谷县三联煤电化工有限责任公司 | Production method of active coke |
| CN106976877A (en) * | 2017-04-24 | 2017-07-25 | 句容市百诚活性炭有限公司 | A kind of preparation method of the flourishing activated carbon of mesopore |
| CN107021485A (en) * | 2017-04-24 | 2017-08-08 | 句容市百诚活性炭有限公司 | A kind of preparation method of the flourishing activated carbon of mesopore |
| CN109835899A (en) * | 2019-04-11 | 2019-06-04 | 上海应用技术大学 | A kind of method that vapor activation prepares lignite base activated coke |
| CN116355637A (en) * | 2023-03-17 | 2023-06-30 | 中国矿业大学 | Low-rank coal-based heavy metal passivator, preparation method and application thereof |
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2010
- 2010-02-02 CN CN2010103010755A patent/CN102139874A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693805A (en) * | 2013-12-02 | 2014-04-02 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN103693805B (en) * | 2013-12-02 | 2014-12-10 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN104229793A (en) * | 2014-09-12 | 2014-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Brown coal active coke and preparation method thereof |
| CN105776208A (en) * | 2016-04-06 | 2016-07-20 | 府谷县三联煤电化工有限责任公司 | Production method of active coke |
| CN106976877A (en) * | 2017-04-24 | 2017-07-25 | 句容市百诚活性炭有限公司 | A kind of preparation method of the flourishing activated carbon of mesopore |
| CN107021485A (en) * | 2017-04-24 | 2017-08-08 | 句容市百诚活性炭有限公司 | A kind of preparation method of the flourishing activated carbon of mesopore |
| CN109835899A (en) * | 2019-04-11 | 2019-06-04 | 上海应用技术大学 | A kind of method that vapor activation prepares lignite base activated coke |
| CN116355637A (en) * | 2023-03-17 | 2023-06-30 | 中国矿业大学 | Low-rank coal-based heavy metal passivator, preparation method and application thereof |
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Application publication date: 20110803 |