CN101914403B - Process and system thereof for forming upgraded lignite - Google Patents
Process and system thereof for forming upgraded lignite Download PDFInfo
- Publication number
- CN101914403B CN101914403B CN 201010262471 CN201010262471A CN101914403B CN 101914403 B CN101914403 B CN 101914403B CN 201010262471 CN201010262471 CN 201010262471 CN 201010262471 A CN201010262471 A CN 201010262471A CN 101914403 B CN101914403 B CN 101914403B
- Authority
- CN
- China
- Prior art keywords
- lignite
- coal
- molded
- brown coal
- feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention relates to a process and a system thereof for forming upgraded lignite, solving the problems of inflammability, explosiveness, environment pollution, low forming rate, poor system stability, low safety performance and the like existing in the forming process of the upgraded lignite. The invention can save the construction cost, reduces the safety risk, decreases the coal dust pollution of a finished product conveying system and has the characteristics of safety, energy saving, environmental protection, high efficiency and stability. The method comprises the following steps of: (1) feeding the formed lignite which is subjected to drying and dehydration and upgrading treatment and meets the requirements for water content, the temperature and the granularity; (2) pressing the lignite into the molded lignite by using a molding device, screening the molded lignite and feeding the qualified molded lignite into next step and turning the unqualified molded lignite into the step (1); (3) air cooling the qualified molded lignite by adopting air with water fog, feeding the cooled molded lignite into a finished bin and feeding lignite powder/granules generated by cooling back to the step (1); and (4) collecting waste gas generated by cooling, removing dust and emptying or recycling to other proper work sections and feeding the lignite power collected by a dust removing device into the step (1).
Description
Technical field
The present invention relates to the technique and the system thereof that are used for upgraded brown coal forming in the industries such as a kind of and electric power, coal.
Background technology
The characteristics such as brown coal are low because of its calorific value, water content is high, easy-weathering is broken, easy spontaneous combustion have been brought a lot of difficulties to aspects such as its burning, transportation, storages.Behind brown coal drying and upgrading, make the moulded coal with certain particle size and compactness, will make its various aspects of performance all be better than the brown coal raw coal, and can effectively solve brown coal problems such as easy-weathering fragmentation, easy spontaneous combustion in transportation, storage process.Thereby the drying and upgrading of brown coal and forming technique become one of main direction of studying of in recent years brown coal processing and application facet.The moulding process of brown coal is divided into binding agent moulding process and binder free moulding process.The binding agent moulding process of brown coal exists the defectives such as the binding agent cost is high, complex process, the increase of shaped coal ash content, calorific value reduction because employed binding agent kind is different.Compare with defects, the binder free forming technique of brown coal demonstrates its outstanding advantage, carries out to some extent the research of brown coal binder free forming technique is also corresponding at present.Patent 200610150125.8 has proposed the hot extrusion briquetting technique of binder free.Gained finished product moulded coal has good water-repellancy, and ultimate compression strength 60-200kg/, dropping strength is greater than 80%, and multiple dry strength is greater than 80%, and thermal value improves a lot, and character is close to bituminous coal, so the method has broad application prospects.Because having poor fluidity, inflammable, explosive, easy efflorescence and coal to be formed, upgraded brown coal in course of conveying, is incubated the characteristics such as difficult, that cooling is serious, may be because of the flow scheme design of formation system in actual mechanical process unreasonablely cause the local buildup of system, produce the problems such as pollution caused by coal dust, coal temperature to be formed reduction, thereby have the potential safety hazards such as spontaneous combustion, blast, affect Systems balanth and move.And require brown coal to be formed to have certain temperature because of hot-forming, temperature is crossed the low hot-forming rate that can affect brown coal.And existing patented technology does not all propose the concrete technology method of upgraded brown coal forming, thereby has limited the application of this type of technology.
Summary of the invention
Purpose of the present invention be exactly for solve exist in the upgraded brown coal forming process inflammable, explosive, environmental pollution, ratio of briquetting is low, system stability is poor, the problems such as safety performance is low, and the deficiency of existing moulding process existence, a kind of technique for upgraded brown coal forming and system thereof are provided, it can save construction cost, reduce security risk, reduce the Finished Product Transport System pollution caused by coal dust, have safety, energy-saving and environmental protection, the advantage such as efficient, stable.
The present invention adopts following technical scheme for achieving the above object:
A kind of technique for upgraded brown coal forming, its step is:
1) brown coal that moulding water ratio, temperature, particle diameter require that meet after drying dehydration, upgrading are processed are sent into shaped device;
2) shaped device is squeezed into coal brown coal, then moulded coal is screened, and qualified changes next step over to, the underproof step 1 that changes over to);
3) to adopt air with water smoke to carry out air-cooled for qualified moulded coal, and cooled moulded coal is sent into finished bin, and the coal dust that produces during cooling/grain is sent step 1 back to);
4) carry out emptying after the dedusting behind the gas sampling that produces in the cooling or be back to use other suitable workshop section, the coal dust that cleaning apparatus is collected is sent into step 1).
Described step 3) in the air that send from the moulded coal bottom with water smoke is adopted in the cooling of moulded coal, above moulded coal, cool off by air inducing mode.
A kind of formation system for upgraded brown coal forming technique, it comprises feed system, feed system is connected with forming machine, forming machine is connected with screening plant, screening plant is connected with air cooling apparatus with water smoke, is provided with gas extractor above air cooling apparatus, and gas extractor is connected with cleaning apparatus, cleaning apparatus is connected with blower unit, and air cooling apparatus then is connected with the finished product district; The coal dust that does not meet forming requirements that screening plant, air cooling apparatus and cleaning apparatus are collected/grain is sent into feed system.
Described feed system comprises scraper conveyor, and it is connected with bucket elevator, and bucket elevator is connected with the dry coal scraper conveyor, and the dry coal scraper conveyor is connected with buffer bin, and buffer bin is connected with forming machine.
Described screening plant is the round sieve that shakes, and it is connected with air cooling apparatus by rotary conveyor.
Described air cooling apparatus is the network chain cooler.
Described cleaning apparatus is tornado dust collector.
The brown coal that moulding water ratio, temperature, particle diameter require of meeting after the present invention processes drying dehydration, upgrading are delivered to bucket elevator through scraper conveyor or the handling equipment that plays equivalent effect, be promoted to the dry coal scraper conveyor, enter the buffer bin of forming machine top through the dry coal scraper conveyor.Upgraded brown coal enters forming machine from buffer bin and carries out extrusion molding behind computation weigh, most of brown coal are squeezed into moulded coal, subsequently moulded coal and the shaped coal not circle that jointly enters the forming machine below sieve that shakes.The screen overflow that circle shakes and sieves, namely moulded coal is delivered to the network chain cooler through the handling equipment of rotary conveyor or an equivalent effect, delivers to finished bin after cooling.The main body of network chain cooler is one, and shaped coal is placed on to be carried above the network chain with the conveying network chain of mesh, and heat-eliminating medium passes shaped coal from the network chain below it is cooled off, and the moulded coal temperature is down to below the safety temperature.This network chain cooler adopts the air-cooled type of cooling that combines with spraying to strengthen cooling performance, namely attracts to be entrained with the air of water smoke by the mesh of network chain cooler through induced draft fan, thereby plays as sieving the effect of upper moulded coal cooling.The air that passes mesh enters into the cooling tornado dust collector of rear end after gas extractor is collected, the fine powder smalls of carrying secretly in the exhaust is separated.Circle shake sieve screen underflow namely not the moulding brown coal return to bucket elevator through rotary conveyor or the handling equipment that plays equivalent effect, promote and be back to the dry coal scraper conveyor.Equally, the moulded coal powder that does not meet forming requirements that the network chain cooler leaks down/grain returns and delivers to bucket elevator by thereunder scraper conveyor is set, and is promoted to the dry coal scraper conveyor, and again carries out extrusion molding after upgraded brown coal mixes, so circulates.
The invention has the beneficial effects as follows:
1, upgraded brown coal and not the moulding brown coal adopt bucket to carry mode of movement, be promoted in the scraper conveyor before the forming machine.Have the following advantages:
(1) can realize the effect that vertical-lift is carried because of bucket elevator, need not to be arranged on the top of buffer bin, and can reduce the placing height of bucket elevator upstream equipment (such as the collection feed bin of preorder workshop section, fly-ash separator etc.), thereby can greatly reduce the total height of factory building, in engineering construction, greatly save the workshop building cost of investment.
(2) mode of movement of employing bucket elevator, compare apart from belt conveyor with using length, can effectively shorten fed distance and time of delivery, the moulding coal dust causes drop in temperature because of returning charge course of conveying length thereby avoided not, and then affect the coal dust temperature that enters forming machine, ratio of briquetting is descended.
(3) the moulding brown coal directly are not delivered to the dry coal scraper conveyor of forming machine top through bucket elevator, make the not returning charge process simplification of moulding brown coal, have avoided in Complicated Flow moulding brown coal not that the potential safety hazard of spontaneous combustion easily occurs in the local buildup of system's internal cause.
2, under forming machine, be provided with the circle sieve that shakes, thereby realized shaped coal and farthest separating of shaped coal not, be conducive to guarantee the forming requirements of finished product.
3, in the moulded coal course of conveying, use the mode of network chain cooling and spray cooling, can effectively avoid moulded coal Yin Gaowen in course of conveying that dieseling occurs, network chain cooler top has alleviated dust pollution greatly with gas extractor simultaneously.The cooling air that is entrained with coal dust is transported to the cooling tornado dust collector after collecting, can be used for other workshop section because having certain temperature after purifying, thereby realize the recycle of energy, reaches energy-conservation beneficial effect.
Description of drawings
Fig. 1 is system construction drawing of the present invention.
Wherein, 1, scraper conveyor, 2, bucket elevator, 3, the dry coal scraper conveyor, 4, buffer bin, 5, forming machine, 6, the circle sieve that shakes, 7, rotary conveyor, 8, the network chain cooler, 9, gas extractor, 10, the cooling tornado dust collector, 11, induced draft fan, 12, finished product bin.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Among Fig. 1, technique of the present invention is:
1) brown coal that moulding water ratio, temperature, particle diameter require that meet after drying dehydration, upgrading are processed are sent into shaped device;
2) shaped device is squeezed into coal brown coal, then moulded coal is screened, and qualified changes next step over to, the underproof step 1 that changes over to);
3) to adopt air with water smoke to carry out air-cooled for qualified moulded coal, and cooled moulded coal is sent into finished bin, and the coal dust that produces during cooling/grain is sent step 1 back to);
4) carry out emptying after the dedusting behind the gas sampling that produces in the cooling or be back to use other suitable workshop section, the coal dust that cleaning apparatus is collected is sent into step 1).
Concrete steps and structure are as follows:
The brown coal that moulding water ratio, temperature, particle diameter require of meeting after drying dehydration, upgrading are processed are delivered to bucket elevator 2 through scraper conveyor 1 or the handling equipment that plays equivalent effect, be promoted to dry coal scraper conveyor 3, enter the buffer bin 4 of forming machine 5 tops through dry coal scraper conveyor 3.Upgraded brown coal enters forming machine 5 from buffer bin 4 and carries out extrusion molding behind computation weigh, most of brown coal are squeezed into moulded coal, subsequently moulded coal and the shaped coal not circle that jointly the enters forming machine 5 belows sieve 6 that shakes.Circle shakes and sieves 6 screen overflow, and namely moulded coal is delivered to network chain cooler 8 through the handling equipment of rotary conveyor 7 or an equivalent effect, delivers to finished product bin 12 after cooling.The main body of network chain cooler 8 is one, and shaped coal is placed on to be carried above the network chain with the conveying network chain of mesh, and heat-eliminating medium passes shaped coal from the network chain below it is cooled off, and the moulded coal temperature is down to below the safety temperature.Network chain cooler 8 adopts the air-cooled type of cooling that combines with spraying to strengthen cooling performance, and namely induced draft fan 11 attracts to be entrained with the air of water smoke by the mesh of network chain cooler 8, thereby plays the effect into moulded coal cooling on the network chain.The air that passes mesh enters into the cooling tornado dust collector 10 of rear end after gas extractor 9 is collected, the fine powder smalls of carrying secretly in the exhaust is separated.Circle shake sieve 6 screen underflow namely not the moulding brown coal return to bucket elevator 2 through scraper conveyor 1 or the handling equipment that plays equivalent effect, promote and be back to dry coal scraper conveyor 3.Equally, the moulded coal powder that does not meet forming requirements that network chain cooler 8 leaks down/grain is carried by scraper conveyor 1 and is back to bucket elevator 2, is promoted to dry coal scraper conveyor 3, and again carries out extrusion molding after upgraded brown coal mixes, so circulates.
Claims (5)
1. formation system that is used for upgraded brown coal forming technique, it is characterized in that, it comprises feed system, feed system is connected with forming machine, and forming machine is connected with screening plant, and screening plant is connected with air cooling apparatus with water smoke, above air cooling apparatus, be provided with gas extractor, gas extractor is connected with cleaning apparatus, and cleaning apparatus is connected with blower unit, and air cooling apparatus then is connected with the finished product district; The coal dust that screening plant, air cooling apparatus and cleaning apparatus are collected/grain is sent into feed system.
2. the formation system for upgraded brown coal forming technique as claimed in claim 1 is characterized in that, described feed system comprises scraper conveyor, it is connected with bucket elevator, bucket elevator is connected with the dry coal scraper conveyor, and the dry coal scraper conveyor is connected with buffer bin, and buffer bin is connected with forming machine.
3. the formation system for upgraded brown coal forming technique as claimed in claim 1 is characterized in that, described screening plant is the round sieve that shakes, and it is connected with air cooling apparatus by rotary conveyor.
4. such as claim 1 or 3 described formation systems for upgraded brown coal forming technique, it is characterized in that, described air cooling apparatus is the network chain cooler.
5. the formation system for upgraded brown coal forming technique as claimed in claim 1 is characterized in that, described cleaning apparatus is tornado dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010262471 CN101914403B (en) | 2010-08-25 | 2010-08-25 | Process and system thereof for forming upgraded lignite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010262471 CN101914403B (en) | 2010-08-25 | 2010-08-25 | Process and system thereof for forming upgraded lignite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101914403A CN101914403A (en) | 2010-12-15 |
| CN101914403B true CN101914403B (en) | 2013-01-23 |
Family
ID=43322052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010262471 Active CN101914403B (en) | 2010-08-25 | 2010-08-25 | Process and system thereof for forming upgraded lignite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101914403B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352272A (en) * | 2011-09-14 | 2012-02-15 | 苏州海陆重工股份有限公司 | Lignite quality-improving device |
| CN104946333B (en) * | 2015-05-26 | 2017-09-26 | 新疆中泰化学托克逊能化有限公司 | A kind of semi-coke powder forming method and device smelted for calcium carbide |
| CN110385779A (en) * | 2018-04-23 | 2019-10-29 | 严瑞山 | A kind of dry powder compound stalk forming device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115202A (en) * | 1975-02-22 | 1978-09-19 | Firma Carl Still | Apparatus for producing non-abrasive coke forms from brown-coal briquets |
| CN101168694A (en) * | 2006-10-27 | 2008-04-30 | 神华国际贸易有限责任公司 | Hot forming method and device without bonding agent for low metamorphic coal |
| 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 |
-
2010
- 2010-08-25 CN CN 201010262471 patent/CN101914403B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115202A (en) * | 1975-02-22 | 1978-09-19 | Firma Carl Still | Apparatus for producing non-abrasive coke forms from brown-coal briquets |
| CN101168694A (en) * | 2006-10-27 | 2008-04-30 | 神华国际贸易有限责任公司 | Hot forming method and device without bonding agent for low metamorphic coal |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 田忠坤等.褐煤无粘结剂热压成型特性.《辽宁工程技术大学学报（自然科学版）》.2009,第28卷(第3期),第494-497页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101914403A (en) | 2010-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201999911U (en) | Biomass molded fuel preparation system | |
| CN101157874A (en) | Coking coal dust shaping technique | |
| CN101440323B (en) | Drying and moulding integrated process for low rank coal | |
| CN204220486U (en) | Raw coal dry separation system | |
| CN101726167B (en) | Smoke semi-closed circulating lignite straight pipe type airflow drying method | |
| CN104109755A (en) | Production system and method of cold-pressed metal pellets of fly ashes | |
| CN101791622B (en) | Process method for converting metal magnesium slag into desulphurizer of boiler | |
| CN101914403B (en) | Process and system thereof for forming upgraded lignite | |
| CN101983942B (en) | Drying and quality improvement apparatus for slime and sludge and technology thereof | |
| CN201785373U (en) | System for upgraded brown coal forming | |
| CN103045321B (en) | Method for drying and upgrading lignite | |
| CN1858166A (en) | Method for producing granular fuel from biomass industrial produced wastes | |
| CN207313550U (en) | A kind of novel wood dust biological particles production system | |
| CN204022910U (en) | A kind of dedusting ash is colded pressing metal pelletizing production system | |
| CN108659909A (en) | A kind of efficient upgrading system of lignite and its method for upgrading of sub-prime classification | |
| CN208643671U (en) | A kind of novel skid-mounted type soil thermal desorption equipment | |
| CN202527263U (en) | Plastic collecting and treating device for copper particle production line | |
| CN206778885U (en) | A kind of iron oxide screening plant | |
| CN103896501A (en) | Kiln tail ventilation system and kiln tail ventilation process of lime production line | |
| CN203474750U (en) | System for producing cedarwood biomass granular fuel | |
| CN108264252B (en) | Green box-type positive pressure fly ash sintered ceramsite production line | |
| CN201873599U (en) | Drying and upgrading device for coal slim and sludge | |
| JPH0459891A (en) | Industrial production of biocoal | |
| CN105199802B (en) | A kind of production method of Chinese chestnut thorn bag biomass molding fuel | |
| CN215887082U (en) | Manganese-rich slag production system capable of recycling dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |