CN103423988A - Low-energy-consumption lignite drying system and drying process for recycling lignite moisture - Google Patents
Low-energy-consumption lignite drying system and drying process for recycling lignite moisture Download PDFInfo
- Publication number
- CN103423988A CN103423988A CN2013103893189A CN201310389318A CN103423988A CN 103423988 A CN103423988 A CN 103423988A CN 2013103893189 A CN2013103893189 A CN 2013103893189A CN 201310389318 A CN201310389318 A CN 201310389318A CN 103423988 A CN103423988 A CN 103423988A
- Authority
- CN
- China
- Prior art keywords
- fluidized bed
- drying
- coal
- separator
- brown coal
- 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.)
- Granted
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of lignite drying and comprehensive and efficient utilization, in particular to a low-energy-consumption lignite drying system and a drying process for recycling lignite moisture. A non-isobaric multistage series fluidized bed drying system is adopted. The drying process comprises the following steps: drying lignite in a high-pressure fluidized bed drier to generate secondary vapor; separating the secondary vapor from the lignite; pressurizing a part of the secondary vapor with a vapor compressor, and adding the part of secondary vapor back into the high-pressure fluidized bed drier for serving as fluidized gas; introducing the other part of the secondary vapor into a fluidized bed drier of a lower pressure grade for serving as a drying heat source; performing heat exchange between the drying heat source and the lignite; condensing the drying heat source into condensed liquid and recovering the condensed liquid; directly cooling and recovering secondary vapor generated by the last stage fluidized bed drier system or taking the secondary vapor as other low-temperature heating source. According to the drying system and the drying process, moisture removed from the lignite can be recycled; meanwhile, energy consumption in the drying process can be lowered, and the energy utilization efficiency, resource utilization efficiency and environmental protection benefit are increased.
Description
Technical field
The present invention relates to brown coal drying and comprehensive high-efficiency utilizes technical field, particularly drying system and the drying process of high-moisture brown coal.
Background technology
Brown coal are coals of a kind of high volatility (50% left and right), high moisture content (more than 30%), low heat value (14MJ/kg left and right).Because of low, the easy spontaneous combustion of its calorific value, should not transport for long-distance, brown coal are considered a kind of low-grade coal resource for a long time.Worldwide, the exploitation degree of brown coal is not high.In China, brown coal mainly are used as near coal-mine Power Plant Fuel, near coal-mine gasified raw material at present.
China's lignite resource is abundant, and the reserves that oneself verifies reaches 1,303 hundred million tons, accounts for 13% left and right of national coal reserves, mainly concentrates on the provinces and regions such as the Inner Mongol, Heilungkiang and Yunnan, and wherein the brown coal reserves maximum in the Inner Mongol, account for 77% of national brown coal reserves.Therefore, reasonable development and take full advantage of the lignite resource of water-deficient area, improving the brown coal comprehensive utilization value is a key areas realizing the national energy security strategic objective.
Predrying and dry is the first steps of brown coal as boiler oil or gasified raw material or other deep processing raw materials.For meeting technological requirement, the strength of brown coal is carried and need to be removed surface water, therefore as large-sized boiler fuel and fluid bed, air flow bed raw material etc., is attended by the brown coal conversion process of fluidisation and process of pneumatic transmission, and brown coal need dehydration.
Transform after the brown coal dehydration, be not only technological requirement, can also increase substantially efficiency of energy utilization and environmental benefit.Take as boiler oil is example: when the brown coal of water content 35wt%, caloric value 12MJ/kg, by drying, after in brown coal, moisture drops to 9wt%～12wt%, its caloric value can increase to 16～18MJ/kg, is equivalent to the brown coal calorific value and has improved 45%～55%, now as fuel, net boiler efficiency has improved 2%～2.8%, fuel quantity reduces 8%～11%, and exhaust gas volumn reduces by 3%～4%, after brown coal drying, can increase substantially efficiency of energy utilization and environmental benefit as boiler oil again.
During as gasified raw material, reduce water content when brown coal, consumption that can decrease oxygen, also can reduce coal consumption simultaneously.For example brown coal adopt entrained flow gasification, the every reduction one percentage point of water content in gasified raw material, the oxygen expenditure of the effective gas of unit can reduce by 0.65 percentage point of left and right, reduces the moisture of gasified raw material for the scale that reduces oxygen expenditure and air separation unit, and effect is significant.Reduce the raw material water content, can effectively improve effective gas content in gasification product simultaneously, this means the raising of the assets utilization efficiency of the gasification installation that investment intensity is large.Therefore, for the transformation project of brown coal comprehensive utilizations, brown coal predrying and dry be a very important step.
The energy consumption of brown coal drying is very large, that in brown coal comprehensive utilization project all processes, energy consumes maximum process, take and remove appearance water as the predrying process of purpose, often remove 1 ton of moisture and need to consume 1.42～1.8 tons of low-pressure steams, what be equivalent to the raw material brown coal is the moisture removal for self more than 33%.Brown coal deep processing transformation project is also the project that water resource consumption intensity is large, a coal-based alkene project of processing 1,000 ten thousand ton/years of brown coal abilities, approximately 2,000 ten thousand ton/years of water resources consumptions.Build the brown coal transformation project in water-deficient area, water resources shortage, become the important restriction factor that brown coal fully utilize.
At present all drying and pre-drying methods comprise the pipe drier drying, and rotary drying, and steam fluidized bed drying all can not effectively utilize the energy of the indirect steam of dry by-product, so the dry run energy utilization efficiency are low; All drying and pre-drying methods, except the steam fluidized bed drying, all can not effectively reclaim the moisture that dry run removes from brown coal at present.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, purpose aims to provide a kind of low energy consumption brown coal drying technique of recycling brown coal moisture.The present invention adopts the differential pressure fluidized bed dryer combination that the device processes ability is large to arrange, reclaim the moisture removed in dry run from brown coal, improve the efficiency of use of flash steam and reduce the investment that utilizes facility, thereby improve energy utilization efficiency, the level of resources utilization and the environmental benefit of brown coal comprehensive utilization project.
For realizing goal of the invention, the technical solution used in the present invention is as follows:
A kind of low energy consumption fluidized bed drying system of recycling brown coal moisture, comprise wet coal bunker feeding device, fluidized bed dryer, the fine coal separator, and brown coal discharge device, it is characterized in that described fluidized bed drying system is non-isobaric plural serial stage fluidized bed drying system, described wet coal bunker feeding device comprises wet coal bunker and conveyer belt, wet coal bunker is connected with described fluidized bed dryer (1-2) by conveyer belt, described fluidized bed dryer (1-2) is connected by equipment pipe with described fine coal separator (1-3), the bottom of described fine coal separator (1-3) is connected with the brown coal discharge device, the top of described fine coal separator (1-3) is connected with the fluidized bed dryer (2-2) of low first class pressure, the fine coal separator top of afterbody fluidized bed drying system is connected with aerial cooler.
In such scheme, the built-in steam indirect of described fluidized bed dryer assembly.
In such scheme, described fine coal separator is the collaborate combination of solid filter separator of gas-solid filter separator or cyclone separator.
In such scheme, described gas-solid filter separator has resolution element or bag filter, and this resolution element or bag filter are made by the gas solid separation material; Above-mentioned gas solid separation material is sintered metal materials, ceramic material, the material of sintering metal and Ceramic Composite or polytetrafluoroethylmaterial material.
In such scheme, in described non-isobaric plural serial stage fluidized bed dryer system, the feeding device of pressurised fluidized bed drying system and drawing mechanism all adopt the lock hopper system, to realize solid material from normal pressure to pressurization or to be pressurized to the switching of normal pressure.
In such scheme, all or part of employing of described equipment pipe is higher than companion's thermal design of vapo(u)rous temperature in drier.
A kind of brown coal drying technique of utilizing claim 1 described fluidized bed drying system, it is characterized in that its dry run is: wet brown coal enter into fluidized bed dryer (1-2) from feeding chamber (1-1) by conveyer, the wet brown coal generation indirect steam that is dried in fluidized bed dryer (1-2), this indirect steam and dried brown coal are together discharged from fluidized bed dryer (1-2) top, enter fine coal separator (1-3), the rear discharge that is cooled of fine coal separator (1-3) brown coal out, enter next process, fine coal separator (1-3) indirect steam out divides two-way: a road is returned and is added to fluidized bed dryer (1-2) as fluidizing gas after vapour compression machine (1-4) pressurization, another road enters the fluidized bed dryer (2-2) of low first class pressure grade as drying source, after this drying source and brown coal complete heat exchange, condense into condensate liquid and be recovered, the indirect steam that afterbody fluidized bed dryer system produces is directly cooled and reclaims or be used as other low-temperature heat thermals source.
In such scheme, the water content 15wt% of described wet brown coal～55wt%, the granularity≤6.3mm of wet brown coal.
In such scheme, in the bottom of described fluidized bed dryer, introduce steam as fluidizing gas.
Beneficial effect of the present invention:
(1) the present invention has adopted the steam indirect, has avoided bleeding of inert gas in dry run, and in indirect steam, inert gas content is low, but the value of indirect steam is high.
(2) the present invention adopts non-isobaric fluid bed series connection drying system, being used in combination of pressurised fluidized bed and low pressure or the normal pressure fluidized bed, strengthened the disposal ability of single series fluid bed, saved the energy consumption that exogenous steam and indirect steam boost, can reclaim brown coal drying simultaneously and discharge moisture.
(3) in the present invention, because the content of inert gas in indirect steam is low, vapor partial pressure is high, and directly cooling is the recyclable dry moisture produced, and this saving of water resource to water-deficient area has great value.
(4) the present invention is applicable to drying, and the dry run such as brown coal pyrolysis upgrading of predrying, the fluidized gasification of the brown coal drying of brown coal fuel boiler, entrained flow gasification that brown coal are raw material.
The accompanying drawing explanation
The typical process flow figure that Fig. 1 is brown coal drying technique of the present invention, wherein 1-1 is wet coal bunker, 1-2 is fluidized bed dryer, 1-3 is the fine coal separator, and 1-4 is vapour compression machine, and 1-5a, 1-5b are cooling device, 2-1 is wet coal bunker, 2-2 is fluidized bed dryer, and 2-3 is the fine coal separator, and 2-4 is vapour compression machine, 2-5 is cooling device, 2-6 is aerial condenser, and A is the high steam pipeline, and B is low pressure steam line, C is the dry coal transfer pipeline, D is the condensate liquid reclaim line, and E is the emptying pipeline of fixed gas, and CW is cooling water.
The specific embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with accompanying drawing, embodiment, but content of the present invention not only is confined to following example.
Embodiment 1
The brown coal drying system that the present embodiment is the non-isobaric fluidized bed dryer series connection of secondary.The brown coal disposal ability is 5,000,000 ton/years, and Fig. 1 is shown in its technological process.
As shown in Figure 1, brown coal drying technique mainly comprises: brown coal pretreatment and fluidized bed drying system drying.
1, brown coal pretreatment: the water yield that is rich in of coming from battery limit (BL) is 15wt%～55wt%, the brown coal that the coal grain is≤300mm enter the feed coal feed bin, send into double-roll crusher through discharging belt feeder, charging belt machine, with the double-roll crusher of high alloy material, material is crushed to two roller gap lengths.Coal grain≤30mm after fragmentation; go out disintegrating machine and send into silo through the charging belt machine; from silo, coal grain out enters flip flop screen; the rough coal grain that screening obtains removes reversible hammer crusher; tup by High Rotation Speed hits to counterpunch board; be crushed to≤6.3mm of coal grain, the duff grain obtained with screening mixes, and delivers to wet coal bunker (1-1) and wet coal bunker (2-1) and stores.
2, utilize the brown coal drying of fluidized bed drying system: the qualified coal grain that the brown coal pretreatment obtains is stored in wet coal bunker (1-1), enter fluidized bed dryer (1-2) by conveyer belt, steam is introduced as fluidizing gas in the bottom of this fluidized bed dryer (1-2), the built-in steam indirect of fluidized bed dryer (2) element, using high steam as drying source, high-pressure steam pressure is 4～10bar, the drying pressure of fluidized bed dryer (1-2) is 3～6bar, brown coal are produced indirect steam by the indirect drying in fluidized bed dryer (1-2), this indirect steam and be dried after brown coal together from fluidized bed dryer (1-2) top, discharge, enter into fine coal separator (1-3) by equipment pipe, this fine coal separator is the gas-solid filter separator, or cyclone separator series winding gas-solid filter separator, its effect is that brown coal are separated with steam, from fine coal separator (1-3), brown coal out are through cooling device (1-5a, 1-5b) cooling rear discharge, enter into next operation, divide two-way from fine coal separator (1-3) steam out: a road is after vapour compression machine (1-4) pressurization, enter into fluidized bed dryer (1-2) as the fluidizing gas reuse, another road enters into fluidized bed dryer (2-2) system of low first class pressure as the indirect thermal source.
The drying pressure of fluidized bed dryer (2-2) is normal pressure, its indirect heat source is that upper level fluidized bed dryer (1-1) system is separated the indirect steam obtained, also supplement the part low-pressure steam simultaneously, after this indirect steam and supplementary low-pressure steam complete heat exchange with brown coal in fluidized bed drying (2-2), condensing into condensed water is recovered, brown coal enter into fluidized bed dryer (2-2) from wet coal bunker (2-1) through conveyer belt, by the dry indirect steam that produces of steam indirect, this indirect steam and dried brown coal are together discharged from the drier top, enter into fine coal separator (2-3), from brown coal discharge after cooling device (2-5) is cooling of discharging fine coal separator (2-3), enter into next operation, divide two-way from fine coal separator (2-3) steam out: a road is after vapour compression machine (2-5) pressurization, enter into fluidized bed dryer (2-2) as the fluidizing gas reuse, another road is after aerial cooler (2-6) is cooling, and fixed gas gas is discharged from, and condensed water reclaims.
Above-mentioned gas-solid filter separator has resolution element or bag filter, and this resolution element or bag filter are by the gas solid separation material: material (material of one deck sintering metal and one deck Ceramic Composite) or the polytetrafluoroethylmaterial material of sintered metal materials (powder of stainless steel sintering, copper powders sintering or titanium powder sintering), ceramic material (general ceramic material), sintering metal and Ceramic Composite are made; The feeding device of above-mentioned pressurised fluidized bed drying system and drawing mechanism all adopt the lock hopper system; The all or part of employing of the said equipment pipeline is higher than companion's thermal design of the saturation temperature of indirect steam in drier.
Technic index is as follows:
(1) raw material and product
--treatment scale: 5,000,000 ton/years
--dry front water content: the 34%(ar yl)
--dry rear water content: the 15%(ar yl)
(2) consumption indicators
--supplement low-pressure steam: 1,600,000 ton/years
--recovered steam condensate liquid: 1,250,000 ton/years
(3) equipment dynamic shaft power: 1500Kw
Obviously, above-described embodiment is only to be the example that clearly explanation is done, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of therefore amplifying or change are still within the protection domain in the invention.
Claims (9)
1. a low energy consumption fluidized bed drying system of recycling brown coal moisture, comprise wet coal bunker feeding device, fluidized bed dryer, the fine coal separator, and brown coal discharge device, it is characterized in that described fluidized bed drying system is non-isobaric plural serial stage fluidized bed drying system, described wet coal bunker feeding device comprises wet coal bunker and conveyer belt, wet coal bunker is connected with described fluidized bed dryer (1-2) by conveyer belt, described fluidized bed dryer (1-2) is connected by equipment pipe with described fine coal separator (1-3), the bottom of described fine coal separator (1-3) is connected with the brown coal discharge device, the top of described fine coal separator (1-3) is connected with the fluidized bed dryer (2-2) of low first class pressure, the top of the fine coal separator of afterbody fluidized bed drying system is connected with aerial cooler.
2. drying system according to claim 1, is characterized in that the built-in steam indirect of described fluidized bed dryer assembly.
3. drying system according to claim 1, is characterized in that described fine coal separator is the collaborate combination of solid filter separator of gas-solid filter separator or cyclone separator.
4. drying system according to claim 3, is characterized in that described gas-solid filter separator has resolution element or bag filter, and this resolution element or bag filter are made by the gas solid separation material.
5. drying system according to claim 4, is characterized in that composite or polytetrafluoroethylmaterial material that described gas solid separation material is sintered metal materials, ceramic material, sintering metal and pottery.
6. drying system according to claim 1, is characterized in that the feeding device of pressurised fluidized bed drying system and drawing mechanism all adopt the lock hopper system in described non-isobaric plural serial stage fluidized bed dryer system.
7. drying system according to claim 1, is characterized in that all or part of employing companion of described equipment pipe thermal design.
8. a brown coal drying technique of utilizing the described fluidized bed drying system of claim 1, it is characterized in that its dry run is: wet brown coal are in wet coal bunker (1-1), enter into fluidized bed dryer (1-2) by conveyer, the wet brown coal generation indirect steam that is dried in fluidized bed dryer (1-2), this indirect steam and dried brown coal are together discharged from fluidized bed dryer (1-2) top, enter fine coal separator (1-3), the rear discharge that is cooled of fine coal separator (1-3) brown coal out, enter next process, fine coal separator (1-3) indirect steam out divides two-way: a road is returned and is added to fluidized bed dryer (1-2) as fluidizing gas after vapour compression machine (1-4) pressurization, another road enters the fluidized bed dryer (2-2) of low first class pressure grade as drying source, after this drying source and brown coal complete heat exchange, condense into condensate liquid and be recovered, the indirect steam that afterbody fluidized bed dryer system produces is directly cooled and reclaims or be used as other low-temperature heat thermals source.
9. drying process according to claim 8, is characterized in that the granularity≤6.3mm of described wet brown coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310389318.9A CN103423988B (en) | 2013-08-30 | 2013-08-30 | A kind of low energy consumption brown coal drying system and drying process recycling brown coal moisture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310389318.9A CN103423988B (en) | 2013-08-30 | 2013-08-30 | A kind of low energy consumption brown coal drying system and drying process recycling brown coal moisture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103423988A true CN103423988A (en) | 2013-12-04 |
| CN103423988B CN103423988B (en) | 2015-08-19 |
Family
ID=49649107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310389318.9A Expired - Fee Related CN103423988B (en) | 2013-08-30 | 2013-08-30 | A kind of low energy consumption brown coal drying system and drying process recycling brown coal moisture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103423988B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727770A (en) * | 2013-12-20 | 2014-04-16 | 韩军 | Hopper drying device, plastic raw material drying method and multi-stage material drying machine |
| CN109442965A (en) * | 2018-11-12 | 2019-03-08 | 北京国电龙源环保工程有限公司 | A kind of brown coal drying receipts water system based on steam recompression technology |
| CN113625796A (en) * | 2021-08-06 | 2021-11-09 | 唐山市宝凯科技有限公司 | Spiral conveying dual-effect evaporation coal material humidity adjusting device and online humidity control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0273406A2 (en) * | 1986-12-31 | 1988-07-06 | Rheinbraun Aktiengesellschaft | Process and plant for drying lignite in a fluidised-bed dryer |
| CN101581532A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Multi-effect system and process for pre-drying lignite through overheated steam |
| CN101788221A (en) * | 2009-12-25 | 2010-07-28 | 山东天力干燥设备有限公司 | Novel silica gel energy-saving drying device and process thereof |
| CN201697441U (en) * | 2010-07-12 | 2011-01-05 | 山东天力干燥设备有限公司 | Indirect heat exchanging drying low-rank coal utilization system of pumped steam of thermal power plant |
| CN102224389A (en) * | 2008-11-24 | 2011-10-19 | Rwe动力股份公司 | Method for generating process steam |
| JP2012214578A (en) * | 2011-03-31 | 2012-11-08 | Mitsubishi Heavy Ind Ltd | Low-grade coal supplying facility and gasification composite power generation system using the low-grade coal |
| CN102967134A (en) * | 2012-11-30 | 2013-03-13 | 山东科院天力节能工程有限公司 | Drying system and process for recovering heat from waste heat steam |
-
2013
- 2013-08-30 CN CN201310389318.9A patent/CN103423988B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0273406A2 (en) * | 1986-12-31 | 1988-07-06 | Rheinbraun Aktiengesellschaft | Process and plant for drying lignite in a fluidised-bed dryer |
| CN102224389A (en) * | 2008-11-24 | 2011-10-19 | Rwe动力股份公司 | Method for generating process steam |
| CN101581532A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Multi-effect system and process for pre-drying lignite through overheated steam |
| CN101788221A (en) * | 2009-12-25 | 2010-07-28 | 山东天力干燥设备有限公司 | Novel silica gel energy-saving drying device and process thereof |
| CN201697441U (en) * | 2010-07-12 | 2011-01-05 | 山东天力干燥设备有限公司 | Indirect heat exchanging drying low-rank coal utilization system of pumped steam of thermal power plant |
| JP2012214578A (en) * | 2011-03-31 | 2012-11-08 | Mitsubishi Heavy Ind Ltd | Low-grade coal supplying facility and gasification composite power generation system using the low-grade coal |
| CN102967134A (en) * | 2012-11-30 | 2013-03-13 | 山东科院天力节能工程有限公司 | Drying system and process for recovering heat from waste heat steam |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727770A (en) * | 2013-12-20 | 2014-04-16 | 韩军 | Hopper drying device, plastic raw material drying method and multi-stage material drying machine |
| CN109442965A (en) * | 2018-11-12 | 2019-03-08 | 北京国电龙源环保工程有限公司 | A kind of brown coal drying receipts water system based on steam recompression technology |
| CN109442965B (en) * | 2018-11-12 | 2024-04-05 | 国能龙源环保有限公司 | Lignite drying and water receiving system based on steam recompression technology |
| CN113625796A (en) * | 2021-08-06 | 2021-11-09 | 唐山市宝凯科技有限公司 | Spiral conveying dual-effect evaporation coal material humidity adjusting device and online humidity control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103423988B (en) | 2015-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103453752B (en) | A kind of low energy consumption brown coal drying technique and equipment thereof reclaiming brown coal moisture | |
| CN101113344B (en) | Kerosene shale comprehensive utilization process | |
| CN103710037A (en) | Fluidized-bed low-rank coal upgrading utilization system and method | |
| CN105062583A (en) | Method for preparing gasification coal water slurry through matching of dried pulverized coal and semicoke | |
| PL230124B1 (en) | Integrated device for drying and dry sorting to enrich the raw coal and a coal enrichment method | |
| CN102061211B (en) | Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis | |
| CN102965170A (en) | Energy-saving environment-friendly lignite briquette preparation technology and system | |
| WO2012162971A1 (en) | Cyclone bed pulverized coal gasification method and system thereof | |
| CN105505467A (en) | Coupling technology adopting lignite-gasification gas production and dry distillation upgrading | |
| CN103045321B (en) | Method for drying and upgrading lignite | |
| CN103423988B (en) | A kind of low energy consumption brown coal drying system and drying process recycling brown coal moisture | |
| CN101168693A (en) | Low water content high heating value coal dust and its preparing method and device | |
| CN104180607B (en) | A kind of brown coal multistage drying and upgrading system | |
| CN103602360B (en) | The device of brown coal fluidised bed drying and upgrading and technique thereof | |
| CN103436322A (en) | Method and equipment for upgrading, drying and forming lignite | |
| CN105276969A (en) | Exhaust gas water and waste heat recovery integrated power generation system capable of drying brown coal | |
| CN205102572U (en) | Power generation system is synthesized with waste heat recovery to dry brown coal and weary air water | |
| CN206544998U (en) | The system for handling low-order coal | |
| CN103673534A (en) | Brown coal drying water-lifting recycling system using waste heat of power plant | |
| CN202938592U (en) | Steam fluidized bed drying device | |
| JP2014173790A (en) | Low-grade coal drying facility and gasification hybrid power system | |
| CN105567337B (en) | The system and method for handling low-order coal | |
| CN202902752U (en) | High-moisture lignite drying device | |
| CN206266512U (en) | The system for processing low-order coal | |
| CN105670698B (en) | The system and method for handling low-order coal |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20180830 |