CN102925174A - Large low-rank coal purifying quality-improving processing device - Google Patents
Large low-rank coal purifying quality-improving processing device Download PDFInfo
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- CN102925174A CN102925174A CN2012104386492A CN201210438649A CN102925174A CN 102925174 A CN102925174 A CN 102925174A CN 2012104386492 A CN2012104386492 A CN 2012104386492A CN 201210438649 A CN201210438649 A CN 201210438649A CN 102925174 A CN102925174 A CN 102925174A
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Abstract
The invention discloses a large low-rank coal purifying quality-improving processing device which comprises a drying furnace, a pyrolyzing furnace connected under the drying furnace and a chilling plate connected under the pyrolyzing furnace, wherein the drying furnace comprises an airtight protective cover and a rotary grate arranged inside the airtight protective cover. The rotary grate comprises multiple radial trusses and is rotatably arranged on a round steel track. By adopting a rotary track supporting structure, the large low-rank coal purifying quality-improving processing device can meet the supporting requirement of a large disc face and ensure safe and stable operation of a rotary hearth furnace.
Description
Technical field
The present invention relates to a kind of purification upgrading processing units, relate in particular to a kind of large-scale low-rank coal and purify the upgrading processing units.
Background technology
The Chinese coal reserves account for 12% of global coal resources, China's low-rank coal standing stock account for about 50% of coal reserves, output accounts for 30% of present total amount, and on areal distribution, the reserves major part concentrates on the Inner Mongol, Shaanxi, Xinjiang, Gansu, Shanxi, six provinces in Ningxia (district).The formation epoch by CHINESE COAL see, maximum with the Jurassic Coal reserves, account for the whole nation and verified about 45% of retained reserve, the coal that is formed by these epoch is except the only a few hard coal, and all the other great majority are the low-rank coal such as brown coal, long-flame coal, non-caking coal and weakly caking coal.Brown coal are the minimum pit coals of degree of coalification, a kind of brownish black, lacklustre grizzle between peat and pitch coal.Be rich in volatile matter, be easy to burn and smolder.World's lignite resource amount accounts for 1/3 of world's coal resources total amount.China's brown coal reserves also account for more than 1/8 of national coal total reserves, and mainly being distributed in east Inner Mongolia, Eastern Yunnan, northeast and south China also has on a small quantity.Brown coal are owing to high-moisture, high-volatile, low heat value, and the characteristics of spontaneous combustion very easily, thus be unsuitable for standing storage and long-distance transportation, be considered for a long time a kind of low-grade coal resource, only be used as at present near coal-mine Power Plant Fuel and near coal-mine gasified raw material, limited the rational exploitation and utilization of lignite resource.How Efficient Conversion utilizes the low-rank coal such as brown coal just to become a major issue of coal utilization.Wherein the most interesting is the liquid fuel that brown coal is converted into relative cleaning.Effective comprehensive utilization of brown coal becomes in recent years a popular research and has the field of DEVELOPMENT PROSPECT.
At present, more to the equipment of low-rank coal dry thermal cracking both at home and abroad, mainly contain following several:
The patent No. is the Quick-drying device for coal of CN95240483.4, is applicable to the raw coal drying of dry coal preparation factory and the dry and low-rank coal drying of cleaned coal of wet coal preparation factory.Adopt higher cover body structure and the double-deck vibrating mass of inside and outside shell, the air distribution plate in the vibrating mass is in tilted layout, and is communicated with cover body on the vibrating mass, be communicated with hotflue down, on frame, the coal seam is under the effect of vibration force and strength by spring support for whole vibrating mass, carry out the caloic transmission with hot flue gas, time of drying is short, and material is not piled up, can be lower dry 400～500 ℃ of comparatively high tempss, product moisture is even, and the outer water of product can be down to below 1%, and lump coal breaking is little, facility compact, simple to operate.
The patent No. is that the utility model of CN200920026493.0 discloses a kind of superheated vapour brown coal pre-drying device, it comprises the internal heating fluidized bed drying machine with at least one built-in heat exchanger, and internal heating fluidized bed drying machine is provided with feeding device, discharge valve II and one-level cleaning apparatus at least; Wherein, built-in heat exchanger is connected with saturation steam, and the fluidized-bed of internal heating fluidized bed drying machine is connected with superheated vapour, and built-in heat exchanger also is connected with condensate system; The weary gas of internal heating fluidized bed drying machine is leaded up to pressurizing device and is returned fluidized-bed after the cleaning apparatus dedusting; Another road is emptying.
Publication number be the low-rank coal of CN101220308A dry with briquette production technique: the low-rank coal raw coal is sent into jaw crusher through feeder be ground into＜particle of 10mm.Pulverizer adopts Hubei Province formula crumbling method, has higher crushing efficiency.Coal after the fragmentation enters fluidized bed dryer, under 100 ℃ ~ 150 ℃ temperature, carry out preliminarily dried and remove part moisture, then enter coal pulverizer and further be ground into fine granularity (0.6 ~ 1.0mm) coal dust, coal dust is sent into the indirect heat transfer rotating drum dryer again, under 150 ℃ ~ 350 ℃ temperature, carry out redrying, to remove moisture.Dried coal dust is after overcooling, and under certain temperature (30 ~ 90 ℃), the coal dust of moisture content qualified (5-18%) is quantitatively sent into main feeder by helical screw feeder, and input speed is controlled by helical screw feeder.Coal dust is sent into the inner roll type high pressure shaped-coal making machine that is comprised of eccentric roller through main feeder, (efficiently with the low-rank coal extrusion molding, enters the finished product coal bunker under 50 ~ 300MPa), produces the briquette prod that the user needs at high pressure.
Publication number is that CN101555410A discloses a kind of method and a kind of pyrolysis plant that carries out pyrolysis.This pyrolysis plant comprises a basically pyrolyzer of sealing, a bubbling fluidized bed vaporizer that directly is connected with pyrolyzer, and one for the condenser that the gaseous matter of condensation is condensed into pyrolysis oil, and the device of fluidizing agent is provided to pyrolyzer.Arrange the fluidized-bed material via pyrolyzer, and make its circulation between import and outlet.
Publication number is that CN101608126A discloses a kind of device for improving quality of coal by pyrolysis, this device comprises a rotary dryer, be used for accepting dry granularity less than the feed coal of 30mm, the rotary drying stove is provided with tube-in-tube structure so that raw coal with the hot flue gases direct heat exchange in hot semicoke indirect heat exchange.A pyrolyzer is accepted the mixture of dried raw coal and semicoke by the solid material feeder pipe line, and makes their direct heat exchange generation pyrolysis.A heating rotary kiln is used for acceptance from the hot semicoke of pyrolyzer, and it is carried out hyperthermic treatment.This pyrolysis device for improving quality has preferably flexibility of operation, and the semicoke that generates and quality of coke tar are also relatively good, but this device technique more complicated, operation easier is high.
One according to the applicant provides a kind of distribution of low-rank coal to purify the upgrading processing units in first to file, and described equipment only applicable separate unit overlaps 500,000 ton/years of following scales; Drive unit is by chain or the rotation of gear driven rotating disk, but drive unit adjusting rotary speed, below sprocket wheel or gear, revolving tubular shaft also is equipped with the horizontal spot contact bearing with inside and outside circle, the inner-ring bearing raceway uses screw fastening on machine-processed backing plate, backing plate is then fixed by a series of radially steel arms that are welded on the circular hollow axle, and the race bearing raceway then uses screw fastening on supporting structure.Whole rotating disk mainly relies on tubular shaft to support.Water seal is not blocked, and a large amount of coal dusts enter water seal in the operational process, affect equipment steady running.
In sum, the shortcoming that low-rank coal of the prior art is dry, mainly there are following several respects in pyrolysis plant:
1, existing rotary hearth furnace supporting structure can not satisfy platter surface support requirement.
2, existing rotary hearth furnace design can not avoid a large amount of coal dusts to enter water seal, affects equipment steady running.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of large-scale low-rank coal to purify the upgrading processing units, by adopting the swing-around trajectory supporting structure, can satisfy the support requirement of platter surface, and guarantees the operation of rotary hearth furnace safety and steady.
For achieving the above object, the invention provides a kind of large-scale low-rank coal and purify the upgrading processing units, comprise drying oven; Pyrolysis oven is connected to the below of described drying oven; And the Quench dish, being connected to the below of described pyrolysis oven, wherein said drying oven comprises airtight guard shield, and is arranged on the rotation grate of this airtight guard shield inside, described rotation grate can be rotatably set on the circular steel track.
Further, described rotation grate also comprises many radially truss and a plurality of arcs, every radially truss comprise the triangular support assembly that is formed by three double angles, the lower end of described triangular support assembly is supported on the chassis of described guard shield a plurality of arcs, the mutual overlapping ground of described a plurality of arc cover type is arranged on the upper end of described radially truss, also have the vertical gap between described each arc, be beneficial to passing through of hot gas carrier.
Further, described vertical gap is 1 ~ 5mm.
Further, described arc is downward-sloping towards center position from the outside of rotation grate.
Further, the number of described radially truss is 8 ~ 20, also correspondingly is provided with on the described chassis for 8 ~ 20 point of suppon that contact with the bottom of described truss.
Further, described circular steel track is arranged on the below of the radially truss of described rotation grate, and the below of described circular steel track also is provided with 8 ~ 20 circular abutments, and the lower end of described column is supported to ground.Further, the position of described 8 ~ 20 point of suppon is welded with a circle I shape shaped steel, is welded with flange beam stand on the described shaped steel, is connected with 8 ~ 20 vehicle wheel components and 1 bull gear on the described support.
Further, also include two with the motor of step-down gear, be arranged on symmetrically by the described steel track, on the deceleration output shaft of described motor a pinion(gear) is housed, described pinion(gear) and the engagement of described bull gear, by pinion drive, the driven rotary grate rotates, and moves thereby the drive vehicle wheel ties up on the steel track.
Further, the internal layout of described rotation grate a series of fixedly rake teeth, when the rotation of described rotation grate, described fixedly rake teeth constantly pushes away center toward grate with coal dust from the outside of rotation grate; The rear portion of described rake teeth is provided with the material level device, in order to the height in even control coal seam.
Further, the sealing structure for water of described drying oven inside adopts the flake type baffle plate to block, thereby to prevent that coal dust from entering sealing structure for water and affecting the equipment stable motion.
According to the step purification upgrading processing units that is applied to low-rank coal of the present invention, adopt the swing-around trajectory supporting structure, solve the problem of large-scale drying oven, pyrolysis oven platter surface underbraced.Large-scale rotary hearth furnace adopts rail support structures, and supporting design gear drive unit guarantees the operation of rotary hearth furnace safety and steady.Adopt the flake type sealing structure for water to solve the problem that coal is dry, the pyrolytic process airborne dust enters water seal.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments.Wherein:
Fig. 1 is the structural representation that large-scale low-rank coal according to the present invention purifies the upgrading processing units; And
Fig. 2 is the structural representation according to drying oven of the present invention.
Embodiment
Below, by exemplary embodiment the present invention is specifically described.Yet should be appreciated that in the situation that is not having further narration element, structure and feature in embodiment also can be attached in other embodiment valuably.
As shown in Figure 1, a kind of large-scale low-rank coal purifies upgrading processing units M, comprises drying oven 10; Pyrolysis oven 20 is connected to the below of described drying oven 10; And Quench dish 30, being connected to the below of described pyrolysis oven 20, wherein said drying oven 10 comprises airtight guard shield 11, and is arranged on the rotation grate 12 of this airtight guard shield inside.Specifically, 10 pairs of low-rank coal of drying oven are carried out convection drying and heating, remove the moisture in the coal and can not cause chemical transformation, the moisture content in the coal is down to below 3%, the control drying temperature is to guarantee not discharge as far as possible methane, carbon monoxide and carbonic acid gas in the raw coal.20 pairs of dried low-rank coal of pyrolysis oven are carried out slight pyrolysis, make coal that chemical reaction occur in pyrolyzer, and the volatile gases material in the coal is released.Low-rank coal after 30 pairs of pyrolysis of Quench dish is carried out quenching, makes it be cooled rapidly to end pyrolytic reaction.
Be worth being with pointing out, in order to solve the problem of platter surface underbraced, consult shown in Figure 2, described rotation grate is provided with many radially truss, every radially truss comprise the triangular support assembly 13 that is formed by three double angles, the lower end of described triangular support assembly is supported on the chassis of described guard shield.
Be preferably, the rotation grate also includes a plurality of arcs, and the mutual overlapping ground of a plurality of arcs cover type is arranged on the upper end of described radially truss, also has the vertical gap between described each arc, is beneficial to passing through of hot gas carrier.That described vertical gap is 1-5mm alternatively.Fall for the ease of coal dust, described arc is downward-sloping towards center position from the outside of rotation grate.
According to a specific embodiment of the present invention, the number of described radially truss is 8 ~ 20, also correspondingly is provided with on the described chassis for 8 ~ 20 point of suppon that contact with the bottom of described truss.Meanwhile, the truss of described rotation grate below also is provided with a circular steel track 14, and the below of described circular steel track also is provided with 8 ~ 20 circular abutments, and the lower end of described column is supported to ground.The position of described 8 ~ 20 point of suppon is welded with a circle I shape shaped steel 15, is welded with flange beam stand on the described shaped steel, is connected with 8 ~ 20 vehicle wheel components 16 and 1 bull gear 17 on described 8 ~ 20 supports.
Be preferably, specific embodiment according to the present invention, radially the number of truss is 16, is provided with 16 point of suppon on the chassis, the below of circular steel track is provided with 16 circular abutments.The position of 16 point of suppon is welded with a circle I shape shaped steel 15, is welded with flange beam stand on the described shaped steel, is connected with 16 vehicle wheel components 16 and 1 bull gear 17 on the described support.
Consult accompanying drawing 2 as seen, in order to guarantee the operation of rotary hearth furnace safety and steady, drying oven of the present invention also includes two with the motor 18 of step-down gear, two motors 18 are arranged on by the described steel track symmetrically, on the deceleration output shaft of described motor a pinion(gear) is housed, pinion drive is passed through in described pinion(gear) and the engagement of described bull gear, the driven rotary grate rotates, and moves thereby the drive vehicle wheel ties up on the steel track.
The rotation grate internal layout a series of fixedly rake teeth, when described rotation grate rotation, described fixedly rake teeth is as plough, coal dust is constantly pushed away the center of past grate from the outside that rotates grate, coal dust falls into tubular shaft 121 by the opening of center, its hollow mandrel 121 has following three Main Functions, is transported to the feed elephant trunk of pyrolysis oven 20 from drying oven 10 as dry high temperature low-rank coal that is:; Part as the support of rotating grate; Part for driving-disc rotary machine structure.In addition, the rear portion of described rake teeth is provided with the material level device, in order to the height in even control coal seam.
Be worth being with pointing out, the circular airtight guard shield on drying oven 10 tops and rotation grate, the circular airtight guard shield of drying oven 10 bottoms and revolving tubular shaft 121, between rotary tubular shaft 121 and the restrained line, all be to use water sealed tank and blade to carry out water-lute, the sealing structure for water of described drying oven inside adopts flake type baffle plate 19 to block, thereby to prevent that coal dust from entering sealing structure for water and affecting the equipment stable motion.
Because the structure of pyrolysis oven and the structure basic simlarity of drying oven, just size is smaller, and for saving space, the applicant repeats no more.
In sum, large-scale low-rank coal purification upgrading processing units of the present invention has following technique effect:
1, owing to adopt the swing-around trajectory supporting structure, solves the problem of the platter surface underbraced of large-scale drying oven, pyrolysis oven;
2, large-scale rotary hearth furnace adopts rail support structures, and supporting design gear drive unit guarantees the operation of rotary hearth furnace safety and steady;
3, adopt the flake type sealing structure for water to solve the problem that coal is dry, the pyrolytic process airborne dust enters water seal.
Be appreciated that the present invention is described by some embodiment, those skilled in the art know, in the situation that does not break away from the spirit and scope of the present invention, can carry out various changes or equivalence replacement to these features and embodiment.In addition, under instruction of the present invention, can make amendment to adapt to concrete situation and material to these features and embodiment and can not break away from the spirit and scope of the present invention.Therefore, the present invention is not subjected to the restriction of specific embodiment disclosed herein, and all interior embodiment of claim scope that fall into the application belong to protection scope of the present invention.
Claims (10)
1. one kind large-scale low-rank coal purifies upgrading processing units (M), comprises drying oven (10); Pyrolysis oven (20) is connected to the below of described drying oven (10); And Quench dish (30), be connected to the below of described pyrolysis oven (20), wherein said drying oven (10) comprises airtight guard shield (11), with the rotation grate (12) that is arranged on this airtight guard shield inside, it is characterized in that described rotation grate can be rotatably set on the circular steel track (14).
2. large-scale low-rank coal as claimed in claim 1 purifies the upgrading processing units, it is characterized in that, described rotation grate also comprises many radially truss and a plurality of arcs, every radially truss comprise the triangular support assembly (13) that is formed by three double angles, the lower end of described triangular support assembly is supported on the chassis of described guard shield, the mutual overlapping ground of described a plurality of arc cover type is arranged on the upper end of described radially truss, also have the vertical gap between described each arc, be beneficial to passing through of hot gas carrier.
3. large-scale low-rank coal as claimed in claim 2 purifies the upgrading processing units, it is characterized in that described vertical gap is 1 ~ 5mm.
4. large-scale low-rank coal as claimed in claim 3 purifies the upgrading processing units, it is characterized in that, described arc is downward-sloping towards center position from the outside of rotation grate.
5. large-scale low-rank coal as claimed in claim 1 purifies the upgrading processing units, it is characterized in that the number of described radially truss is 8 ~ 20, also correspondingly is provided with on the described chassis for 8 ~ 20 point of suppon that contact with the bottom of described truss.
6. large-scale low-rank coal as claimed in claim 5 purifies the upgrading processing units, it is characterized in that, described circular steel track (14) is arranged on the below of the radially truss of described rotation grate, the below of described circular steel track also is provided with 8 ~ 20 circular abutments, and the lower end of described column is supported to ground.
7. large-scale low-rank coal as claimed in claim 5 purifies the upgrading processing units, it is characterized in that, the position of described 16 point of suppon is welded with a circle I shape shaped steel (15), be welded with flange beam stand on the described shaped steel, be connected with 8 ~ 20 vehicle wheel components (16) and 1 bull gear (17) on the described support.
8. large-scale low-rank coal as claimed in claim 7 purifies the upgrading processing units, it is characterized in that, also include two motors with step-down gear (18), be arranged on symmetrically by the described steel track, on the deceleration output shaft of described motor a pinion(gear) is housed, pinion drive is passed through in described pinion(gear) and the engagement of described bull gear, the driven rotary grate rotates, and moves thereby the drive vehicle wheel ties up on the steel track.
9. large-scale low-rank coal as claimed in claim 1 purifies the upgrading processing units, it is characterized in that, the internal layout of described rotation grate a series of fixedly rake teeth, when the rotation of described rotation grate, described fixedly rake teeth constantly pushes away center toward grate with coal dust from the outside of rotation grate; The rear portion of described rake teeth is provided with the material level device, in order to the height in even control coal seam.
10. large-scale low-rank coal as claimed in claim 1 purifies the upgrading processing units, it is characterized in that, the sealing structure for water of described drying oven inside adopts flake type baffle plate (19) to block, thereby to prevent that coal dust from entering sealing structure for water and affecting the equipment stable motion.
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| CN201210438649.2A CN102925174B (en) | 2012-11-06 | 2012-11-06 | Large low-rank coal purifying quality-improving processing device |
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| CN201210438649.2A CN102925174B (en) | 2012-11-06 | 2012-11-06 | Large low-rank coal purifying quality-improving processing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103980923A (en) * | 2014-05-27 | 2014-08-13 | 湖南华银能源技术有限公司 | Rotary coal purification furnace capable of eliminating thermal stress |
| CN104059678A (en) * | 2014-06-24 | 2014-09-24 | 湖南华银能源技术有限公司 | Continuous solid phase material delivering, guiding and distribution device |
| CN105121987B (en) * | 2013-04-12 | 2016-10-05 | 中外炉工业株式会社 | Rotary hearth furnace |
| CN106053119A (en) * | 2016-08-04 | 2016-10-26 | 中国五环工程有限公司 | Experiment device for researching rake teeth design |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106053119B (en) * | 2016-08-04 | 2019-02-22 | 中国五环工程有限公司 | A kind of experimental provision of research rake teeth design |
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| CN102925174B (en) | 2015-03-11 |
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