CN101792686A - Lignite drying and screening forming process and drying and screening device thereof - Google Patents
Lignite drying and screening forming process and drying and screening device thereof Download PDFInfo
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- CN101792686A CN101792686A CN201010108667A CN201010108667A CN101792686A CN 101792686 A CN101792686 A CN 101792686A CN 201010108667 A CN201010108667 A CN 201010108667A CN 201010108667 A CN201010108667 A CN 201010108667A CN 101792686 A CN101792686 A CN 101792686A
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Abstract
The invention relates to a lignite drying and screening forming process which comprises the following steps of: directly sending the lignite to a rotary-cylinder drying and screening machine after processing lignite by a pulverizing machine, and drying the lignite by hot flue gas; introducing the dried lignite into a screening cylinder during lignite raw material drying process, directly delivering out the screened coarse lignite, and introducing fine lignite particles into a forming machine; introducing fine lignite powder in the rotary-cylinder drying and screening machine into a fine powder collecting device, introducing the dust in the fine powder collecting device into a cloth bag dust-removing device through a duct, and introducing the fine lignite powder into the forming machine; delivering out the fine lignite particles and the fine lignite powder after forming in the forming machine; and exhausting dust by a fan machine through a duct. The invention screens lignite during the drying process, selects high-quality lignite as a finished coal product to be sold at a high price, and forms low-quality coal as molded coal to be sold in an adhesive-free extrusion mode. The process increases the heat value of lignite, reduces the self ignition probability of lignite, and solves the problem of environmental pollution of powder coal during storage, packaging and transportation processes. By adopting the special device for drying and screening, the invention has simple process and wide application range.
Description
Technical field
The device that the present invention relates to a kind of moulding process and in this technology, use, particularly a kind of brown coal drying screening forming process and dry screening plant thereof.
Background technology
Brown coal are important energy and industrial chemicals, but owing to brown coal moisture height, characteristics such as calorific value is low, fugitive constituent is high, easy nature, cause its selling price low, sell radius and are restricted.Existing brown coal drying moulding process is varied, though its dry technology is gradually ripe, in service also to have reflected dried brown coal efflorescence more serious at it, is unfavorable for preserving and transporting for long-distance; For solving this technical problem, Australian company adopts the BCB technology that dried brown coal are carried out forming processes.This technology adopts the tube type drying technology, needs all brown coal are all carried out depth crushing before drying, has wasted big energy, and the moulding cost is higher.
Summary of the invention
The present invention be directed to the many deficiencies that exist in the prior art, one provides a kind of functional quality that not only improves brown coal, and operation is simple, the brown coal drying screening forming process that can solve problems such as storage behind the brown coal drying, dress, fortune, and two dry sieves that provide a kind of this moulding process indispensability divide the moulding device.
Realize that the technical scheme that above-mentioned purpose adopts is: this brown coal drying screening forming process, carry out according to following steps:
A, the brown coal raw material that will select are directly sent the rotary drying sieve apparatus to through behind the crusher, and are carried out drying by the hot flue gas that enters the rotary drying sieve apparatus;
In b, the brown coal raw material drying process, enter the sifting barrel of rotary drying sieve apparatus, the Coarse Coal after screening is directly exported as finished product lump coal, and Bed for Fine Coal enters shaper;
Fines in c, the rotary drying sieve apparatus is brought fine powder collector by hot flue gas into by pipeline and is carried out the fine breeze collection, dust in this fine powder collector is brought sack cleaner by hot flue gas into by pipeline, carry out dedusting, the fine breeze that fine powder collector and sack cleaner are collected enters shaper;
D, Bed for Fine Coal and fine breeze are directly exported as the finished product moulded coal carry out moulding in shaper after;
E, the waste gas after sack cleaner filters are discharged by pipeline by induced draft fan.
Rotary drying sieve apparatus in this dry screening forming process comprises the rotating cylinder that is used for dry raw coal, comprises also and the sifting barrel of rotating cylinder with the footpath that described sifting barrel is fixedlyed connected with rotating cylinder is concentric, and the sifting barrel outside is provided with the screening case.
Compared with prior art, the present invention can sieve brown coal earlier in the drying process of brown coal according to actual needs, selecting high quality brown coal sells goods at a high figure as readymade coal, again remaining low-quality coal being carried out the binder free extrusion molding handles, being re-used as moulded coal sells, like this, the small part in the product is as the bunker coal of system, and major part is sold.The thermal value that this dry sieve divides the moulding technology not only to improve brown coal, the spontaneous combustion probability of minimizing brown coal has solved fine coal problem of environment pollution caused in the saving fortune process, and adopts peculiar equipment to carry out the drying screening, and technology is simple, and is applied widely.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is the installation site synoptic diagram of rotary drying sieve apparatus.
Fig. 3 is the sifting barrel structural representation.
Among the figure: hotblast stove 1, rotating cylinder 2, sifting barrel 3, screening case 4, fine powder collector 5, sack cleaner 6, induced draft fan 7, shaper 8, lump coal delivery port 9, dividing plate 10, fines collection spiral 11, Bed for Fine Coal delivery port 12.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
Referring to accompanying drawing 1-3, in the present embodiment, this brown coal drying screening forming process carries out according to following steps:
A, the brown coal raw material that will select are directly sent the rotary drying sieve apparatus to through after the crusher in crushing, and are carried out drying by the hot flue gas that enters the rotary drying sieve apparatus equally.Described hot flue gas is supplied with by the hotblast stove that is installed in rotary drying sieve apparatus head.
B, brown coal raw material are before its drying process finishes, enter the sifting barrel of rotary drying sieve apparatus, the size of the screen mesh of this sifting barrel can be changed according to the needs of actual product, Coarse Coal after the sifting barrel screening is directly exported as finished product lump coal, and Bed for Fine Coal then enters shaper.
C, the interior buoyant fine breeze of rotary drying sieve apparatus are brought fine powder collector by hot flue gas into by pipeline and are carried out the fine breeze collection, grain dust in this fine powder collector is brought sack cleaner by hot flue gas into by pipeline again, carry out dedusting and obtain fine breeze, the fine breeze that fine powder collector and sack cleaner are collected also enters shaper.
D, Bed for Fine Coal and fine breeze adopt the binder free extrusion molding in shaper, directly export as the finished product moulded coal then.
E, the waste gas after sack cleaner filters are discharged by pipeline by induced draft fan.
At the rotary drying sieve apparatus described in the brown coal drying screening forming process, comprise the rotating cylinder 2 that is used for dry raw coal, also comprise and the sifting barrel 3 of rotating cylinder 2 with the footpath, sifting barrel 3 and rotating cylinder 2 concentric fixedlying connected, sifting barrel 3 adopts the arc screening plate assembled formation, and the screen size of sieve plate is changed according to actual needs, and sifting barrel 3 outsides are provided with screening case 4, and this screening case 4 is sleeved on its inside with sifting barrel 3.
The bottom of screening case 4 is connected with a dividing plate 10, and this dividing plate 10 places the below of sifting barrel 3 exit end, and dividing plate 10 both sides are respectively Bed for Fine Coal delivery port 12 and lump coal delivery port 9.Bed for Fine Coal delivery port 12 bottoms also are provided with the Bed for Fine Coal gathering screw 11 that is communicated with it, and Bed for Fine Coal gathering screw 11 places the front end of dividing plate 10, and lump coal delivery port 9 places the rear end of dividing plate 10.The below of Bed for Fine Coal delivery port 12 is the belt conveyor of shaper 8, and the below of lump coal delivery port 9 is the belt conveyor of finished product output.
Claims (3)
1. a brown coal drying screening forming process is characterized in that, described technology is carried out according to following steps:
A, the brown coal raw material that will select are directly sent the rotary drying sieve apparatus to through behind the crusher, and are carried out drying by the hot flue gas that enters the rotary drying sieve apparatus;
In b, the brown coal raw material drying process, enter the sifting barrel of rotary drying sieve apparatus, the Coarse Coal after screening is directly exported as finished product lump coal, and Bed for Fine Coal enters shaper;
Fines in c, the rotary drying sieve apparatus is brought fine powder collector by hot flue gas into by pipeline and is carried out the fine breeze collection, dust in this fine powder collector is brought sack cleaner by hot flue gas into by pipeline, carry out dedusting, the fine breeze that fine powder collector and sack cleaner are collected enters shaper;
D, Bed for Fine Coal and fine breeze are directly exported as the finished product moulded coal carry out moulding in shaper after;
E, the waste gas after sack cleaner filters are discharged by pipeline by induced draft fan.
2. the rotary drying sieve apparatus in the described brown coal drying screening forming process of claim 1, comprise the rotating cylinder that is used for dry raw coal, it is characterized in that, also comprise and the sifting barrel of rotating cylinder with the footpath, described sifting barrel is fixedlyed connected with rotating cylinder is concentric, and the sifting barrel outside is provided with the screening case.
3. rotary drying sieve apparatus according to claim 2 is characterized in that, described screening case bottom is connected with dividing plate, and this dividing plate places the below of sifting barrel exit end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010108667A CN101792686A (en) | 2010-02-11 | 2010-02-11 | Lignite drying and screening forming process and drying and screening device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010108667A CN101792686A (en) | 2010-02-11 | 2010-02-11 | Lignite drying and screening forming process and drying and screening device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101792686A true CN101792686A (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010108667A Pending CN101792686A (en) | 2010-02-11 | 2010-02-11 | Lignite drying and screening forming process and drying and screening device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965168A (en) * | 2012-11-07 | 2013-03-13 | 中国重型机械研究院股份公司 | Brown coal modification and upgrading method |
| CN103673508A (en) * | 2012-09-05 | 2014-03-26 | 天华化工机械及自动化研究设计院有限公司 | Method for drying, screening and collecting graphite powder |
| CN109682167A (en) * | 2018-12-13 | 2019-04-26 | 中国矿业大学 | A kind of low-order coal drying and upgrading integration apparatus and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440323A (en) * | 2008-10-31 | 2009-05-27 | 大唐国际化工技术研究院有限公司 | Drying and moulding integrated process for low rank coal |
| CN101519614A (en) * | 2009-03-04 | 2009-09-02 | 中国化学工程股份有限公司 | Process for dryness, formation and further processing of water-enriched lignite |
| CN101530845A (en) * | 2009-04-27 | 2009-09-16 | 天津科技大学 | Combined disk vibration drying screening machine |
-
2010
- 2010-02-11 CN CN201010108667A patent/CN101792686A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440323A (en) * | 2008-10-31 | 2009-05-27 | 大唐国际化工技术研究院有限公司 | Drying and moulding integrated process for low rank coal |
| CN101519614A (en) * | 2009-03-04 | 2009-09-02 | 中国化学工程股份有限公司 | Process for dryness, formation and further processing of water-enriched lignite |
| CN101530845A (en) * | 2009-04-27 | 2009-09-16 | 天津科技大学 | Combined disk vibration drying screening machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673508A (en) * | 2012-09-05 | 2014-03-26 | 天华化工机械及自动化研究设计院有限公司 | Method for drying, screening and collecting graphite powder |
| CN103673508B (en) * | 2012-09-05 | 2015-06-17 | 天华化工机械及自动化研究设计院有限公司 | Method for drying, screening and collecting graphite powder |
| CN102965168A (en) * | 2012-11-07 | 2013-03-13 | 中国重型机械研究院股份公司 | Brown coal modification and upgrading method |
| CN109682167A (en) * | 2018-12-13 | 2019-04-26 | 中国矿业大学 | A kind of low-order coal drying and upgrading integration apparatus and method |
| CN109682167B (en) * | 2018-12-13 | 2019-10-29 | 中国矿业大学 | A kind of low-order coal drying and upgrading integration apparatus and method |
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Application publication date: 20100804 |