CN201558751U - Drying and dry separation combination raw coal quality improvement device - Google Patents
Drying and dry separation combination raw coal quality improvement device Download PDFInfo
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- CN201558751U CN201558751U CN2009202718270U CN200920271827U CN201558751U CN 201558751 U CN201558751 U CN 201558751U CN 2009202718270 U CN2009202718270 U CN 2009202718270U CN 200920271827 U CN200920271827 U CN 200920271827U CN 201558751 U CN201558751 U CN 201558751U
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Abstract
The utility model provides a drying and dry separation combination raw coal quality improvement device, which comprises a coal supply system, a hot air system, a drying system, a dust removing exhaust system and a dry separation system, wherein the coal supply system uses a raw coal conveying device to respectively supply the raw coal to the hot air system and the drying system; the hot air system is a heat supply part of the drying system; the drying system is used for drying and dehydrating the raw coal; the dust removing exhaust system consists of a dust remover and an exhaust fan; and the dry separation system comprises a dry separator, a circulating fan and a cyclone dust collector and is used for sorting the dried raw coal into clean coal, middle coal and recrement. The device not only organically combines the dry coal preparation with the drying process and makes full use of the respective advantages of drying and dry separation, but also enlarges the application range of the device, has small investment and low production cost and is convenient for popularization and application of the coal quality improvement technology.
Description
Technical field
The utility model relates to material sorting field, is specifically related to a kind of dry dry separation associating raw coal upgrading device, and it also is applicable to the sorting and the upgrading of the unclassified stores outside the coal.
Background technology
The water content of coal and ash content, sulphur content are the key factors that influences the coal quality.In order to improve the quality of coal, must dewater and sorting to coal.Along with the exploitation of coal upgrading technology, coal drying and dry separation craft have obtained using widely therein, and have obtained significant effect.
For example, a kind of coal slime drying equipment is disclosed in Chinese patent CN2494964Y, it is supplied with part by fluidized bed drying part, thermal source and constitutes, the fluidized drying part is connected to form successively by coal conveyor, disintegrating machine, predrying device, screw(-type) feeder, fluid bed fluidized drying stove, double cyclone, belt feeder etc., and thermal source is supplied with part and is made of flue gas stove, blender and servicing unit.In addition, disclose a kind of air jigging dry coal preparation machine sorting bed exciting device in Chinese patent CN2889494Y, comprising vibrating motor and elastic parts, vibrating motor and sorting bed are affixed, and the vibrating motor rotating shaft is vertical with the compass screen surface of sorting bed sieve plate; It is medium with the air, sorting material is formed the work characteristics of air jigging layering according to the air jigging dry coal preparation, adopting exciting device is that same specification vibrating motor symmetry is installed, the output shaft and the vertical design of sorting bed working face of vibrating motor, this design makes the direction of vibration of sorting bed consistent with the outbound course of material, vibrating motor need not to carry material and throws motion, and material relies on the sorting bed in wind-force picking-up, jigging, the delaminating process and enters discharge device with short stroke.
" the coal drying system optimization research " delivered on " coal journal " 04 phase in 2004 discloses a kind of dry coal preparation technology, wherein according to of the control requirement of air dense medium fluidized bed dry coal preparation to feed coal moisture, granularmetric composition characteristic and moisture distribution characteristic in conjunction with 50～6mm sized coal grain, under the effect of vibrator, thin layer coal is shifted to discharge end apace from feeding end on air distribution plate, thermal current passes air distribution plate and coal seam from bottom to top, with the coal grain strong caloic exchange taking place, makes the surperficial Free water rapid evaporation of coal grain.
Especially, combined type dry coal separation as the coal discharge refuse, effective practical technique of sulphur is fallen, the conserve water resource, avoid the black water secondary pollution, technology is simple, small investment, production cost are low, are fit to the demand of coal enterprises in China and are applied rapidly with its exclusive characteristics, for coal processing provides a kind of economical and practical coal preparation method.
But can former moisture content of coal size be use one of major influence factors of dry coal preparation, and free moisture surpasses 9% coal owing to separating effect reduces, and then can not directly select the dry coal preparation technology for use.In addition, China's lignite resource is abundant, but coal chance cementization is serious, must adopt dry coal preparation, yet because degree of metamorphism is low, and moisture is big, is to influence the main cause that dry coal preparation is promoted.On the other hand, drying device is in carrying out dry process to high-moisture coal, need a large amount of thermals source and enough drying times, disposal ability is inversely proportional to dehydration intensity, the current drying device is in order to improve output, dehydration intensity is very restricted, and dehydration is between 6-12%, and making dry mode separately dry up, to improve caloric value limited.Dry and dry separation is compared, and the investment of the drying device of identical scale and production cost are 3-4 times of dry separation.
Thereby from equipment, consider economically, use dry and dry separation equipment respectively, and cause to be limited by former coal quality and to be difficult to promote dry coal preparation, it is too big and make the investor be difficult to acceptance to be limited by investment.And, be limited by present technical merit,, there is not good way to address the above problem at home and abroad.
In addition, well-known, China is the production and consumption big country of coal, and in primary energy constituted, coal accounted for 75% great number proportion.A large amount of coal conversion are the demand that electric power is supported national economy.Produced in 13.25 hundred million tons of raw coal in 1997, have 5.23 hundred million tons to be used for generating, promptly the coal-burning power plant has consumed 39.5% of national coal production, is maximum coal user.It is the situation of main energy sources that generating relies on coal, also is like this in many developed countries.For example, as the U.S. of generating and big coal country, 86%～89% of its domestic coal consumption total amount is used for power plant.Thereby, the capital expenditure of coal-burning power plant, economical operation and ambient influnence, relevant with Coal Quality to a great extent.In the thermal power generation cost, the coal expense accounts for 80%.Therefore, the lifting ature of coal is vital to the influence of coal-burning power plant.
So, be badly in need of a kind of addressing the above problem at present, and meet the country of sustainable development and environmental protection and energy saving and ature of coal lifting means and the technology that industry requires.
The utility model content
The inventor is through long-term technological development and research, a kind of dry dry separation associating raw coal upgrading device and method have been proposed, this drying dry separation associating raw coal upgrading device and method have solved the drawback that dry dry separation is used separately preferably, and by dry dry separation integration of operation, not only realize sharing of identical function equipment, also realized coal separation process byproduct (as spoil) energy recycling.
According to the technical solution of the utility model, a kind of dry dry separation associating raw coal upgrading device is provided, it comprises coal-supply system, hot-air system, drying system, dedusting gas extraction system and dry separation system, wherein coal-supply system can be divided into dry raw coal coal supply and hot-blast stove coal two parts, and coal-supply system uses the raw coal feeding device respectively raw coal to be supplied with to hot-air system and drying system; Hot-air system is the supplying heat source part of drying system, described hot-air system comprises hot-blast stove, expansion chamber and first main air blower, the hot blast that flue gas that hot-air system will generate in hot-blast stove handles through removing Mars in the expansion chamber, be mixed into uniform temperature with cold air again is through the first main air blower forced feed drying system, and first fan out draft is connected in the bottom of the drier in the drying system; Drying system is used for the raw coal drying and dehydrating, reduces the moisture of raw coal, dried product of coal via drying after the product delivery mechanism deliver to the dry separation system; The dedusting gas extraction system is used for the recovery of fine grained coal dust, and the dedusting gas extraction system comprises sack cleaner and exhaust blower, and the dedusting gas extraction system is connected between drying system and the dry separation system, and described exhaust blower is made of air-introduced machine and blast pipe; The dry separation system comprises dry-dressing machine, circulating fan, cyclone dust collectors, is used for being that with dried raw coal separation be cleaned coal, coal and spoil.
The temperature of the described hot blast that the flue gas that preferably, generates in hot-blast stove handles through removing Mars in the expansion chamber, mix with cold air again is approximately 50 ℃-280 ℃.
Preferably, the temperature of the described hot blast that mixes with cold air is about 250 ℃.
Preferably, the raw coal feeding device is the raw coal belt feeder, and dry back product delivery mechanism is a dry back product belt feeder.
Preferably, the nucleus equipment of drying system is a vibrating mixed flow dryer.
Preferably, the dry-dressing machine in the dry separation system is the combined type dry coal separation machine.
Preferably, hot-blast stove is chain-type hot-blast stove or boiling type hot-blast stove.
Use according to dry dry separation associating raw coal upgrading device of the present utility model, overcome the defective of above-mentioned independent use drying and dry separation equipment, not only dry coal preparation and drying process are organically combined, brought into play the advantage separately of drying and dry separation, and enlarged the range of application of equipment, small investment, production cost is low, is convenient to applying of coal upgrading technology; Greatly avoid energy waste in addition.
Brief Description Of Drawings
Fig. 1 is the structural representation according to the dry dry separation associating raw coal upgrading device of technical solutions of the utility model;
Fig. 2 is the process module figure according to the dry dry separation associating raw coal upgrading method of technical solutions of the utility model.
The specific embodiment
The technical scheme of the utility model patent is described below in conjunction with accompanying drawing 1 and Fig. 2, in the specific embodiment below, if there is not specified otherwise therein, then employed parts or method are conventional components and method, and the annexation between each conventional components is used conventional the connection.
As shown in fig. 1 be a kind of dry dry separation associating raw coal upgrading device, this drying dry separation associating raw coal upgrading device comprises coal-supply system, hot-air system, drying system, dedusting gas extraction system and dry separation system.Coal-supply system can be divided into dry raw coal coal supply and hot-blast stove coal two parts, and coal-supply system uses the raw coal feeding device respectively raw coal to be supplied with to hot-air system and drying system; Raw coal feeding device shown in Fig. 1 is the raw coal belt feeder, also can use chain delivery mechanism and other conventional material delivery mechanism.
Hot-air system is the supplying heat source part of drying system, described hot-air system comprises hot-blast stove, expansion chamber and first main air blower, the hot blast that flue gas that hot-air system will generate in hot-blast stove handles through removing Mars in the expansion chamber, be mixed into uniform temperature with cold air again is through the first main air blower forced feed drying system, and first fan out draft is connected in the bottom of the drier in the drying system.Wherein, the temperature of the described hot blast that the flue gas that generates in hot-blast stove handles through removing Mars in the expansion chamber, mix with cold air again is approximately 50 ℃-280 ℃, is preferably about 250 ℃; According to demand of practical production, also can generate the hot blast of other suitable temperatures.Hot-blast stove is chain-type hot-blast stove or boiling type hot-blast stove.
Drying system is used for the raw coal drying and dehydrating, reduces the moisture of raw coal, dried product of coal via drying after the product delivery mechanism deliver to the dry separation system.The nucleus equipment of drying system is a vibrating mixed flow dryer.Dry back product delivery mechanism shown in Fig. 1 is a dry back product belt feeder.
The dedusting gas extraction system is used for the recovery of fine grained coal dust, and the dedusting gas extraction system comprises deduster and exhaust blower, and the dedusting gas extraction system is connected between drying system and the dry separation system, and exhaust blower is made of air-introduced machine and blast pipe.Deduster shown in Fig. 1 uses sack cleaner.
The dry separation system comprises dry-dressing machine, circulating fan, cyclone dust collectors, is used for being that with dried raw coal separation be cleaned coal, coal and spoil.Dry-dressing machine in the dry separation system is the combined type dry coal separation machine.
Now dry dry separation associating raw coal upgrading method is described in conjunction with Fig. 1 and Fig. 2, as shown in Figure 2 be the process module figure that the raw coal upgrading method is united in dry dry separation.Dry dry separation associating raw coal upgrading method may further comprise the steps:
1) use coal-supply system that dry coal supply and hot-blast stove coal are provided; With the broken and conveying through coal-supply system of low-quality raw coal, broken back coal particle size is delivered to drying system greater than 8mm and less than the moisture-free coal source of 50mm via belt feeder, and broken back coal particle size send hot-blast stove less than the conny of 8mm.Hot-blast stove is divided into chain-type hot-blast stove and boiling type hot-blast stove, when the low heat value of raw coal during greater than promptly about 3840 kilocalories of 16000kJ/kg/kg directly as the fuel of chain-type hot-blast stove; When the low heat value of raw coal adopts the hot-blast stove of boiling hot-blast stove as coal-supply system during less than 16000kJ/kg.
2) use hot-air system to handle again with cold air and be mixed into hot blast about 150-280 ℃ through removing Mars by the flue gas that in hot-blast stove, generates through the bottom of the drier in the first main air blower forced feed drying system; Hot-air system is also referred to as heat source system in Fig. 2.
3) use drying system that raw coal is carried out drying: drying system uses vibrating mixed flow dryer, coal stream flow to coal outlet through the multilayer vibrated bed from top to bottom, hot blast passes the multilayer vibrated bed from bottom to top and discharges through the exhaust outlet on top, it is adverse current that macroscopic view between coal stream and the hot blast flows, and promptly flows, has again the horizontal adverse current of coal and hot blast in the square crossing of inner existing coal of drier and hot blast.
4) utilize the dedusting of dedusting gas extraction system: the dedusting gas extraction system is made up of deduster and exhaust blower, and deduster is separated the coal dust in the waste gas, merges in the product coal, and the clean waste gas after the processing is through the exhaust blower emptying.
5) use the dried raw coal of dry separation system's sorting, with dried raw coal separation is cleaned coal, middle coal and spoil, cleaned coal is sold as the product coal, middle coal can be incorporated cleaned coal into and do the sale of product coal, also can be back to coal feed point selects again, part spoil can be used as the fuel of boiling hot-blast stove, and another part spoil is made refuse and handled.
More specifically, technological merit of the present utility model is: remove Mars at the hot flue gas that hot-blast stove produces through expansion chamber, fed by the bottom of first main air blower from drying machine, moor coal material is transported from the drying machine top by the raw coal belt feeder and enters, after the even drying of moor coal material quilt, major part is exported by belt feeder from the drying machine bottom, and the thin material of a part enters sack cleaner with hot air flow, the isolated material of sack cleaner reclaims as product, and waste gas is discharged by blast pipe through air-introduced machine. Dried product of coal is sent into dry-dressing machine by the dry separation coaling belt conveyor and is carried out sorting, and cleaned coal and spoil are respectively by cleaned coal belt feeder and the output of spoil belt feeder after the sorting. Second main air blower provides the dry-dressing machine sorting required air quantity, and cyclone dust collectors are connected with second main air blower, removes than the coarse granule coal dust, and the protection draught fan impeller is few frayed; Sack cleaner is in parallel with cyclone dust collectors, guarantees that the gas dust content enter in the atmosphere is lower than national standard, and direct air amount around the dry-dressing machine, forms negative-pressure operation, improves the sorting usefulness of dry-dressing machine.
In addition, although provided optimal design of the present utility model in the above, improve for the routine of all parts, tested enforcement by the inventor, can obtain good technique effect. For example, earlier dry rear dry separation is not the full-range unique selection of connection, if the spoil content of raw coal is higher, and table moisture (visible moisture) is not high, in the time of can carrying out the dry separation operation, the user should preferentially select drying process after the first dry separation, under the identical condition of investment, elder generation's dry separation scheme is to carry out dry place amount after removing earlier spoil, improves upgraded coal output more than 20% ~ 30% than first drying proposal; Under the identical condition of upgraded coal output, can reduce investment about 30%. If the table moisture of raw coal is too high or spoil content when not high, moistly then can not carry out the dry separation operation, so just only had earlier dry after dry separation unique selection scheme. For simplification of the present utility model, other materials applicatory or parts or process modification have not just been enumerated one by one at this.
In sum, clearly in the utility model described dry dry separation combination raw coal quality improvement of the present utility model in detail. Further, this area those skilled in the art are appreciated that in the situation of the spirit and scope of the present utility model that do not deviate from the claims definition, can make various modifications in form and details.
Claims (7)
1. raw coal upgrading device is united in a dry dry separation, and it comprises coal-supply system, hot-air system, drying system, dedusting gas extraction system and dry separation system, it is characterized in that:
Coal-supply system is divided into dry raw coal coal supply and hot-blast stove coal two parts, and coal-supply system uses the raw coal feeding device respectively raw coal to be supplied with hot-air system and drying system;
Hot-air system is the supplying heat source part of drying system, described hot-air system comprises hot-blast stove, expansion chamber and first main air blower, the hot blast that flue gas that hot-air system will generate in hot-blast stove handles through removing Mars in the expansion chamber, be mixed into uniform temperature with cold air again is through the first main air blower forced feed drying system, and first fan out draft is connected in the bottom of the drier in the drying system;
Drying system is used for the raw coal drying and dehydrating, reduces the moisture of raw coal, dried product of coal via drying after the product delivery mechanism deliver to the dry separation system;
The dedusting gas extraction system is used for the recovery of fine grained coal dust, and the dedusting gas extraction system comprises sack cleaner and exhaust blower, and the dedusting gas extraction system is connected between drying system and the dry separation system, and described exhaust blower is made of air-introduced machine and blast pipe;
The dry separation system comprises dry-dressing machine, circulating fan, cyclone dust collectors, is used for being that with dried raw coal separation be cleaned coal, coal and spoil.
2. according to the dry dry separation associating raw coal upgrading device of claim 1, it is characterized in that the temperature of the described hot blast that the flue gas that generates handles through removing Mars in the expansion chamber, mix with cold air again is approximately 50 ℃-280 ℃ in hot-blast stove.
3. according to the dry dry separation associating raw coal upgrading device of claim 1 or claim 2, it is characterized in that the temperature of the described hot blast that mixes with cold air is about 250 ℃.
4. according to the dry dry separation associating raw coal upgrading device of claim 1 or claim 2, it is characterized in that described raw coal feeding device is the raw coal belt feeder, described dry back product delivery mechanism is a dry back product belt feeder.
5. according to the dry dry separation associating raw coal upgrading device of claim 1, it is characterized in that the nucleus equipment of drying system is a vibrating mixed flow dryer.
6. according to the dry dry separation associating raw coal upgrading device of claim 1, it is characterized in that the described dry-dressing machine in the dry separation system is the combined type dry coal separation machine.
7. according to the dry dry separation associating raw coal upgrading device of claim 1, it is characterized in that described hot-blast stove is chain-type hot-blast stove or boiling type hot-blast stove.
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| CN2009202718270U CN201558751U (en) | 2009-11-19 | 2009-11-19 | Drying and dry separation combination raw coal quality improvement device |
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| CN2009202718270U CN201558751U (en) | 2009-11-19 | 2009-11-19 | Drying and dry separation combination raw coal quality improvement device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011060620A1 (en) * | 2009-11-19 | 2011-05-26 | Li Gongmin | Integrated drying and dry-separating apparatus for upgrading raw coal and method of using same |
| CN102206523A (en) * | 2011-04-21 | 2011-10-05 | 李功民 | Device for brown coal powder thermoforming |
| CN103307891A (en) * | 2013-05-27 | 2013-09-18 | 东南大学 | Comprehensive utilization system and method for lignite upgrading and drying energy |
| CN109550326A (en) * | 2019-01-11 | 2019-04-02 | 唐山市神州机械有限公司 | A kind of sundry filter applied to coal dry-dressing machine |
| CN109663447A (en) * | 2019-02-21 | 2019-04-23 | 唐山市神州机械有限公司 | A kind of dry separation system and dry dressing method of the underground based on circulating current |
-
2009
- 2009-11-19 CN CN2009202718270U patent/CN201558751U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011060620A1 (en) * | 2009-11-19 | 2011-05-26 | Li Gongmin | Integrated drying and dry-separating apparatus for upgrading raw coal and method of using same |
| CN101705131B (en) * | 2009-11-19 | 2012-09-05 | 李功民 | Raw coal upgrading device and method with combination of drying and dry separation |
| CN102206523A (en) * | 2011-04-21 | 2011-10-05 | 李功民 | Device for brown coal powder thermoforming |
| CN102206523B (en) * | 2011-04-21 | 2013-04-03 | 李功民 | Device for brown coal powder thermoforming |
| CN103307891A (en) * | 2013-05-27 | 2013-09-18 | 东南大学 | Comprehensive utilization system and method for lignite upgrading and drying energy |
| CN109550326A (en) * | 2019-01-11 | 2019-04-02 | 唐山市神州机械有限公司 | A kind of sundry filter applied to coal dry-dressing machine |
| CN109663447A (en) * | 2019-02-21 | 2019-04-23 | 唐山市神州机械有限公司 | A kind of dry separation system and dry dressing method of the underground based on circulating current |
| CN109663447B (en) * | 2019-02-21 | 2024-03-08 | 唐山神州机械集团有限公司 | Underground dry separation system and method based on circulating air flow |
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