CN102728448B - Dry coal preparation device for fluidized bed - Google Patents
Dry coal preparation device for fluidized bed Download PDFInfo
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- CN102728448B CN102728448B CN201210190371.1A CN201210190371A CN102728448B CN 102728448 B CN102728448 B CN 102728448B CN 201210190371 A CN201210190371 A CN 201210190371A CN 102728448 B CN102728448 B CN 102728448B
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Abstract
The invention relates to a dry coal preparation device for a fluidized bed, which comprises a sorting chamber, a coal inlet, a sorting medium inlet, an air distributing system, a sunk coal discharging system, a float coal overflow port and an exhaust port, wherein the sunk coal discharging system comprises a plurality of sunk coal storing chambers; a sunk coal intermittent discharging valve is mounted at the bottom end of each of the sunk coal storing chambers; a row of air distributing pipes are arranged in each of the sunk coal storing chambers; a series of small air distributing holes are formed on the downside of the air distributing pipes; air distribution is realized by each air distributing chamber; and the exhaust port is connected with a side part of the coal inlet through a pipeline and utilizes exhaust to realize the primary air separation and local dry of the inlet coal. The complexity and instability of a chain transmission scraper blade device are omitted according to the dry coal preparation device for the fluidized bed; the continuous sorting and discharging for sunk and float coals are easily realized; the air distribution is uniform and stable and the coal grains are prevented from falling into an air supply system; and the dry coal preparation device for the fluidized bed has an excellent sorting effect and can simultaneously realize the dry sorting and drying process of the raw coal.
Description
Technical field
The present invention relates to a kind of fluid bed dry coal preparation equipment, belong to a kind of dry method preparation equipment that fluid bed principle and fluidization technology is applied to coal separation.
Background technology
Coal in China reserves and output are all at the forefront in the world, and within significant period of time from now on, coal will be all first energy of China.But simultaneously few, the skewness of China's high-quality coal and directly utilize seriously pollutedly, therefore coal separation becomes the Main Means that obtains high-quality coal.In recent years because wet coal preparation technology is subject to distribution of water resources and supply is uneven, the restriction of the factor such as easy freezing under the easy argillization of some coal wet concentrations and severe cold condition, dry coal preparation technology grows up gradually and is worldwide utilized.
Current disclosed dressing coal with dry fluidized bed equipment, the disclosed dressing coal with dry fluidized bed method and apparatus of for example Chinese patent CN87101056 and the disclosed dry sorting device for giant air heavy-medium fluidized-bed of Chinese patent CN92111310.2, its principal character is and comprises chain scraper induction system, in order to the hypostasis of sorting and floating thing are discharged to fluid bed from difference outlet.Utilizing chain scraper to realize major defect heavy, floating particles output is that this chain scraper has had a strong impact on particle layering and bed sorting, cause the mispairing of light, heavy coal, cause separating effect to decline, make the complicated stability huge and that reduction equipment moves greatly of whole fluidized system simultaneously.
In addition, directly utilize air compartment and fluid bed tradition air distributor structure to make duff grain to fall into air compartment by air distribution plate, cause line clogging and compartment pressure imbalance etc.; Dry coal preparation fluid bed coal preparation technology is to entering coal particle size and humidity range is had relatively high expectations, too much duff grain is piled up and can seriously be reduced separating effect in bed, and moisture is larger, separating effect is also poorer, therefore can utilize dry separation bed itself to enter coal secondary screening and dry.
Summary of the invention
The present invention is directed to the deficiency and the defect that in existing dry method fluid bed coal preparation technology, exist, a kind of fluid bed dry coal preparation equipment is proposed, this equipment has been cancelled traditional chain gearing, respectively by heavy coal apotheca and intermittently blow-off valve, float coal overfall will sink, float coal grain discharge fluid bed; Meanwhile, exhaust passes into coal supply pipeline, will enter a coal and screen and be dried, and carries away part duff grain and moisture, to improve particle diameter lower limit, the reduction moisture into a coal.
Technical scheme of the present invention is: a kind of fluid bed dry coal preparation equipment, comprise separation chamber, coal feed point, separating medium entrance, heavy coal discharge system, float coal overfall and exhaust outlet, described coal feed point, separating medium entrance and exhaust outlet are positioned at the top of separation chamber, it is characterized in that: described heavy coal discharge system comprises multiple heavy coal apothecas, the bottom of each heavy coal apotheca is provided with intermittently blow-off valve of a heavy coal; In described each heavy coal apotheca, be furnished with the airduct of arranging; Described wind-distributing pipe downside has a series of cloth wind apertures; Described wind-distributing pipe is realized air distribution by air compartment, and described air compartment is arranged at each heavy coal apotheca outside; Described air compartment is connected with air supply device by pipeline.
Another technical characterictic of the present invention is: described exhaust outlet comprises first row gas port and second row gas port; In the middle of described coal feed point, be the first coal feed point and the second coal feed point by baffle for separating; Described first row gas port is connected with a side of the first coal feed point by pipeline, and the gas of discharge is vertically discharged from opposite side through the first coal feed point; Described second row gas port is connected with a side of the second coal feed point by pipeline, and the gas of discharge is vertically discharged from opposite side through the second coal feed point.
In technique scheme, the horizontal spacing between described wind-distributing pipe is 50-300mm; The diameter of described cloth wind aperture is 5-30mm; Described air supply device passes into hot-air or hot flue gas.
Advantage of the present invention is: 1. separation chamber bottom is provided with heavy coal apotheca and intermittently blow-off valve of heavy coal, separation chamber's left and right sides wall paper is equipped with float coal overfall, respectively in order to will sink, float coal grain discharges, and avoided the equipment unstability that adopts chain drive screeding device to bring; 2. in assorting room, large beans charcoal is piled up at heavy coal apotheca and separation chamber bottom, and the air of discharging through cloth wind system upwards flows by the gap of rough coal grain, therefore piles up the role that rough coal grain has served as air distribution plate, makes air feed more even; 3. air-distribution device adopts multicell cloth wind structure, and each chamber is made up of air compartment and wind-distributing pipe, has realized the horizontal even distributing wind of bed; Wind-distributing pipe has a series of cloth wind apertures down, can prevent that coal grain from falling in air supply device by aperture; 4. exhaust outlet is connected with coal feeding hole by pipeline, makes exhaust intersect selection by winnowing discharging before fluid bed first with coal supply, the fine breeze entering in a coal grain can be carried away like this, and wall has been exempted from too much particulate and entered bed, affects separating effect; Meanwhile, exhaust can realize the part of coal dry with the contact process that enters coal; If what 5. air supply device was supplied with is hot-air or Low Temperature Thermal flue gas, the fluidisation assorting room in fluid bed and exhaust and entering all can realize dry to coal in the cross-contact process of coal, like this, this invention can realize dry separation and the dry run of raw coal simultaneously.
Accompanying drawing explanation
Fig. 1 is that overall structure master of the present invention looks schematic diagram.
Fig. 2 is overall structure schematic top plan view of the present invention.
Fig. 3 is cloth wind system partial schematic diagram of the present invention.
In figure: 1-separation chamber; 2-coal feed point; 2a-the first coal feed point; 2b-the second coal feed point; 3-sinks coal apotheca; Intermittently blow-off valve of the heavy coal of 4-; 5-float coal overfall; 6a-first row gas port; 6b-second row gas port; 7-separating medium entrance; 8-air compartment; 9-wind-distributing pipe.
The specific embodiment
Further illustrate principle of the present invention, concrete structure and preferred forms below in conjunction with accompanying drawing.
Fig. 1 is that overall structure master of the present invention looks schematic diagram, the present invention includes separation chamber 1, coal feed point 2, separating medium entrance 7, heavy coal discharge system, float coal overfall 5 and exhaust outlet, coal feed point 2, separating medium entrance 7 and exhaust outlet are all positioned at the top of separation chamber 1, by coal feed point 2, the coal being made up of certain grade are fed to fluidized-bed layer; Separating medium constantly feeds by separating medium entrance 7, to supplement the consumption of the loss of separating medium in assorting room; In assorting room, separating medium serve as bed expect and make coal particle in bed by density and granularity layering, ashless fat coal floats on bed face on constantly, deposits to bottom bed containing the more heavy coal of bulky grain (spoil) of ash content; Float coal overfall 5 is distributed in the both walls of separation chamber 1, and the light coal grain floating in running is constantly discharged bed body by this float coal overfall 5; Heavy coal discharge system comprises multiple heavy coal apothecas 3, and the bottom of each heavy coal apotheca 3 is provided with intermittently blow-off valve 4 of a heavy coal; The weight sinking in running is in the interior accumulation of heavy coal apotheca 3, and intermittently blow-off valve 4 intermittently startings of heavy coal, constantly discharge the spoil that contains more ash content bed body, realize thus continuous pulp discharge heavy, floating particles.
Fig. 2 is overall structure schematic top plan view of the present invention, and exhaust outlet comprises first row gas port 6a and second row gas port 6b; Middle by dividing plate in the middle of coal feed point 2 is the first coal feed point 2a and the second coal feed point 2b by baffle for separating; First row gas port 6a is connected with a side of the first coal feed point 2a by pipeline, the gas of discharging is vertically discharged from opposite side through the first coal feed point 2a, realize like this cross-contact of exhaust and coal supply, the particulate coal entering in coal can be carried away, avoid too much fines to enter fluidized-bed layer, in bed, pile up and affect separating effect; Equally, second row gas port 6b is connected with a side of the second coal feed point 2b by pipeline, and the gas of discharge is vertically discharged from opposite side through the second coal feed point 2b, realizes the washing that intersects of this part of exhaust and coal supply.Meanwhile, the washing that intersects of exhaust and coal supply, can take away the portion of water that enters coal again, realizes the part dry run into coal; If air supply device uses hot-air or flue gas air feed, the washing process that intersects of the fluidisation assorting room in bed and exhaust and coal supply all can be realized the dry run of coal in coal separation process, i.e. the present invention can realize the dry method washing of raw coal simultaneously and be dried.
Fig. 3 is cloth wind system partial schematic diagram of the present invention, and cloth wind system adopts multicell air feed structure, to realize the even distributing wind of each air compartment.In each heavy coal apotheca 3, be furnished with the airduct 9 of arranging; Wind-distributing pipe 9 downsides have a series of cloth wind apertures 10, and aperture is opening down is mainly to have avoided duff material to fall in cloth wind system by aperture; Enter bed from cloth wind aperture 10 effluent airs by the particle gap in heavy coal apotheca 3, therefore the particle of heavy coal apotheca 3 interior accumulations has served as the role of air distribution plate, makes the cloth wind of bed more even; Wind-distributing pipe 9 is realized air distribution by air compartment 8; Air compartment 8 is arranged at each heavy coal apotheca 3 outsides, is connected with air supply device by pipeline.For realizing the coal separation of size fractionated scope, be convenient to the heavy oarse-grained discharge of coal, the horizontal spacing scope of wind-distributing pipe 9 is 50-300mm; For realize cloth wind evenly and meet the requirement of cloth ventilation pressure loss, the diameter range of cloth wind aperture 10 is 5-30mm.
Operation principle of the present invention: air is sent in each air compartment 8 by air supply device, is entered bed by the cloth wind aperture 10 of wind-distributing pipe 9; Enter a coal and separating medium and feed through coal feed point 2 and separating medium entrance 7 respectively, realize gas-solid fluidization process in bed, the high-quality light coal that dust burdening is lower constantly floats on bed face, can cross light coal overfall 5 and discharge bed body; The coarse granules such as the spoil that dust burdening is more sink down into bed bottom, and in the interior accumulation of heavy coal apotheca 3, heavy coal is 4 intermittently startings of blow-off valve intermittently, and the heavy coal discharge body that bed bottom is piled up has been realized continuous-feeding and the discharge of this fluid bed dry coal preparation equipment thus.Air by bed is discharged by exhaust outlet, before thoroughly discharging bed, exhaust outlet is connected to coal feed point 2 places, utilizes exhaust will enter coal and carries out washing, with part fines coal and moisture with entering in coal, to improve the separating effect of bed.In addition, air supply device can provide hot-air or Low Temperature Thermal flue gas, and like this, hot gas medium serves as fluidization air, realizes greatly the dry run of coal in said process, can realize thus fluid bed dry coal preparation and dry run simultaneously.
Claims (3)
1. a fluid bed dry coal preparation equipment, comprise separation chamber (1), coal feed point (2), separating medium entrance (7), heavy coal discharge system, float coal overfall (5) and exhaust outlet, described coal feed point (2), separating medium entrance (7) and exhaust outlet are positioned at the top of separation chamber (1), it is characterized in that: described heavy coal discharge system comprises multiple heavy coal apothecas (3), the bottom of each heavy coal apotheca (3) is provided with intermittently blow-off valve (4) of a heavy coal; In described each heavy coal apotheca (3), be furnished with the airduct (9) of arranging; Each wind-distributing pipe (9) downside has a series of cloth wind apertures (10); In each heavy coal apotheca (3) one airduct (9) of arranging is realized air distribution by corresponding air compartment (8), and described air compartment (8) is arranged at each heavy coal apotheca (3) outside; Each air compartment (8) is connected with air supply device by pipeline;
Described exhaust outlet comprises first row gas port (6a) and second row gas port (6b); In the middle of described coal feed point (2), be the first coal feed point (2a) and the second coal feed point (2b) by baffle for separating; Described first row gas port (6a) is connected with a side of the first coal feed point (2a) by pipeline, and the gas of discharge is vertically discharged from opposite side through the first coal feed point (2a); Described second row gas port (6b) is connected with a side of the second coal feed point (2b) by pipeline, and the gas of discharge is vertically discharged from opposite side through the second coal feed point (2b).
2. a kind of fluid bed dry coal preparation equipment according to claim 1, is characterized in that: the spacing between described wind-distributing pipe (9) is 50-300mm; The diameter of described cloth wind aperture (10) is 5-30mm.
3. a kind of fluid bed dry coal preparation equipment according to claim 1, is characterized in that: described cloth wind aperture (10) passes into hot-air or hot flue gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210190371.1A CN102728448B (en) | 2012-06-08 | 2012-06-08 | Dry coal preparation device for fluidized bed |
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| CN201210190371.1A CN102728448B (en) | 2012-06-08 | 2012-06-08 | Dry coal preparation device for fluidized bed |
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| CN102728448A CN102728448A (en) | 2012-10-17 |
| CN102728448B true CN102728448B (en) | 2014-06-04 |
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| CN104480498B (en) * | 2015-01-05 | 2016-10-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten-salt electrolysis cathode deposition separation method and separation equipment |
| CN106111533B (en) * | 2016-06-29 | 2019-03-15 | 中国矿业大学 | A kind of mineral dry method vibration sorting unit and method |
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| US4861464A (en) * | 1987-05-29 | 1989-08-29 | State Of Israel, Ministry Of Agriculture | Method and apparatus for separation using fluidized bed |
| CN1046102C (en) * | 1993-02-15 | 1999-11-03 | 中国矿业大学 | Vibration fluidized-bed dry sorting method and apparatus for fine coal |
| BR9906717A (en) * | 1998-11-02 | 2000-10-17 | Kawasaki Jugogyo Kabushiki Kai | Multi-chamber fluidized bed sorting equipment |
| CN201501840U (en) * | 2009-09-02 | 2010-06-09 | 袁长胜 | Moisture-control grading bed |
| CN102120215B (en) * | 2010-09-19 | 2013-05-01 | 中国科学院过程工程研究所 | Solid particle material pneumatic grading preheating and humidifying method and device |
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Effective date of registration: 20230412 Address after: No.03073, Taiyuan Steel Industrial Park, Taiyuan City, Shanxi Province Patentee after: TAIYUAN BOILER GROUP Co.,Ltd. Address before: 100084 Beijing Haidian District Beijing 100084 box 82 box, Tsinghua University Patent Office Patentee before: TSINGHUA University |
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