CN102604660B - Moisture control grading system and moisture control grading method for materials - Google Patents
Moisture control grading system and moisture control grading method for materials Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
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Abstract
The invention discloses a moisture control grading system and a moisture control grading method for materials, which are particularly suitable for coke and coal pretreatment processes in the coking industry. The method adopts a rotary drying unit to carry out drying, multiple layers of return pipes and scrapers are arranged in the rotary drying unit, and after being dried, materials enter a vibrating graded drying unit and are further dried and graded. The method can adopt single gas or liquid medium to carry out drying alone, and also can use two types of drying media to simultaneously dry the materials, and for overhigh-temperature drying media, inert gas can be filled to prevent the overdrying of pulverized coal; and in addition, the method also can grade the dried materials in order to prevent ultrafine-granularity materials from entering a coke oven to increase the amount of dust in the coke oven. The technical method has the advantages of high treatment capability, high applicability, abundant drying medium sources, adjustable drying degree and the like.
Description
Technical field
The present invention relates to damping and hierarchy system and damping and the stage division of a kind of material (for example, coal or coal dust), relate in particular to a kind of material moisture-control grading system and moisture-control grading method that is applicable to the technique of coking industry coking coal.
Background technology
The conditioning technique of coal can reduce into the stove pulverized coal water content, reduces the coking process fuel consumption, and increase coking output and improve coke quality, be the new way of energy-saving and emission-reduction in the coking production technique.China's coking coal reserves are large, and coke output ranks first in the world, but coking coal moisture is higher, and the coking process energy consumption is higher than external mean level (ML).Within 2010, China's coke output is 3.75 hundred million tons, and the coking process energy consumption is 106kgce/t, higher by 5%～10% than external mean level (ML), and it is high that major cause is that China's coking coal enters stove moisture, and average moisture content is in 12% left and right.Research shows, the coal humidifying technology can be reduced to 5%～6% from 10%～11% by the moisture in coal dust, can make coke oven volume increase 11%, coking process Energy Intensity Reduction 14%, thereby can be by weak caking coal polygamy 8%～10% in the mixture of coke and weak caking coal, coke quality improves 1.0%～1.5%, and in waste gas, dust emission concentration is reduced to 50mg/Nm
3below.
The conditioning technique of coal is to utilize drying medium and the direct or indirect heat exchange of coal dust to reduce and stablize to control into the stove moisture content of coal.And the interior coking production of domestic TECHNIQUE TO LARGE INTEGRATED STEEL WORKS is common and the production gang of iron and steel, correlative study shows, the stock number of China's Iron And Steel Industry residual heat and energy is up to the 455.1kgce/t steel, the technology that exploitation can utilize these low-lying level residual heat and energies to apply on the coal humidifying technology, not only can significantly reduce the energy consumption of coking process, and can improve the utilization ratio of China's steel industry residual heat and energy, reached the purpose of energy-saving and emission-reduction.
Simultaneously, inevitably can produce collision in the processes such as exploitation, fragmentation, transportation, storage and transhipment due to coking coal, wearing and tearing produce fine coal, so in the coking production process, the increase of fine coal ratio will cause in raw gas carries coal dust secretly, cause the increase of recovery of chemical products systemic resistance, even can blocking pipe when serious.
Summary of the invention
Based on the above-mentioned problems in the prior art, the present invention proposes a kind of material moisture-control grading system and moisture-control grading method, the method can utilize the low-lying level residual heat and energy of one or both coke-oven plants or Steel Complex as drying medium, the mode that adopts direct contact drying to combine with contactless drying, carry out material damping processing.
According to an invention of the present invention, a kind of damping and hierarchy system of material is provided, comprising: the drying medium feeding means, be connected to multitube rotary formula drying installation, carry and be used for the withering drying medium of material, multitube rotary formula drying installation, comprise material inlet, inner tube, can rotating rotating cylinder, the first drying medium entrance, the second drying medium entrance, the first drying medium outlet, the second drying medium outlet and cylindrical shell feed opening, multitube rotary formula drying installation receives pending material by material inlet and receives from the first drying medium of drying medium feeding means input by the first drying medium entrance, described inner tube receives from the second drying medium of drying medium feeding means input by the second drying medium entrance, material after being dried is discharged to the vibration separation drying installation by the cylindrical shell feed opening, the first drying medium and discharging by the first drying medium outlet from the water vapour of material, the second drying medium is discharged by the second drying medium outlet, the vibration separation drying installation, be connected with the cylindrical shell feed opening of multitube rotary formula drying installation, receives through the dried material of multitube rotary formula drying installation, and the vibration separation drying installation has screening plant, and material is carried out to the gradation processing, the drying medium flow rate control device, the amount that enters the drying medium of multitube rotary formula drying installation and/or vibration separation drying installation for control.
Wherein, the drying medium feeding means is also connected to the vibration separation drying installation, for to the vibration separation drying installation, passing into drying medium.
Wherein, described drying medium flow rate control device comprises at least one valve and at least one flow director, the amount for control inputs to the drying medium of multitube rotary formula drying installation and/or vibration separation drying installation.
Multitube rotary formula drying installation and vibration separation drying installation comprise feed unit, and described feed unit comprises feed bin, material feeder and weight dumper.
Determine whether according to the temperature of the drying medium that passes into multitube rotary formula drying installation the amount that passes into rare gas element and pass into rare gas element, cause while preventing the drying medium excess Temperature that material is rotten or explode.
Described rotating cylinder inboard has can drive the scraper plate that material moves together, by the revolution of drying cylinder, falls after being reach a certain height by scraper flight animal material, and arrive bottom of cylinder after multilayer inner tube heat exchange drying, to realize the drying of material.
According to the kind of drying medium, single exhaust emissions pipeline is set, or gaseous state drying medium discharge pipe and liquid drying medium discharge pipe are set respectively.
The water vapour, volatile matter and the dust that in the gaseous state drying medium directly contacted with material discharged by the first drying medium outlet and drying process, produce are introduced smoke stack emission after the dust treatment system purification.
After vibration separation drying installation vibrosieve, make the coal dust of size fractionated enter different feed bins, therefrom obtain the coal dust of expection humidity and granularity.
The rotating cylinder of rotary type drying installation is with respect to the horizontal direction certain angle that tilts.
Described screening plant is the multi-layer bar bar grizzl(e)y, and each layer of bar screen in described multi-layer bar bar grizzl(e)y pressed height placement from high to low from the entrance of material to the outlet of material.
According to another invention of the present invention, provide a kind of damping of material as above and hierarchy system utilized material to be carried out to the method for damping and classification, comprise: will treat that the mass transport of damping is to the feed bin of multitube rotary type drying installation, input the first drying medium of the second drying medium and gaseous state from the drying medium feeding means, then make material contact with the tube wall of inner tube and the first drying medium of gaseous state, the second drying medium drying that material is passed in the first drying medium of gaseous state and described inner tube; Be discharged to the vibration separation drying installation through the dried material of multitube rotary formula drying installation from the cylindrical shell feed opening, whether determine that according to the moisture situation of material passing into drying medium from the drying medium entrance of vibration separation drying installation carries out further drying, utilize the screening plant of vibration separation drying installation to carry out vibrosieve to material, by granular size, material is divided into at least two kinds, is transported to respectively different feed bins.
Described method also comprises: material is carried out to dried drying medium and discharge after together with water vapour, volatile matter and dust from material, entering the fly-ash separator dedusting.
Described method also comprises: pass into the second liquid drying medium in inner tube, by making material, contact with tube wall and material is carried out to drying.
Described method also comprises: also pass into a certain amount of rare gas element and regulated in rotating cylinder, to prevent material burning or blast.
Described method also comprises: when the material in rotating cylinder is overheated, pass into water coolant in inner tube.
Described method also comprises: regulate the flow of drying medium by the drying medium flow rate control device, make dried material reach the damping requirement of setting.
Compared with prior art, beneficial effect of the present invention is: 1, can adopt gaseous state and liquid two kinds of drying mediums or use separately a kind of drying medium to carry out damping, drying medium is selected extensively.2, can carry out the vibration separation processing to coal dust after dry damping, also can carry out further drying simultaneously.3, can introduce rare gas element in contact drying, guarantee to be unlikely to produce the rotten of coal or blast in the process of damping.
The accompanying drawing explanation
The description of being undertaken by the accompanying drawing below in conjunction with an example exemplarily is shown, above and other purpose of the present invention and characteristics will become apparent, wherein:
Fig. 1 has schematically shown moisture-control grading system and corresponding technical process according to an embodiment of the invention;
Fig. 2 has schematically shown the included multitube rotary formula drying installation of moisture-control grading system according to an embodiment of the invention;
Fig. 3 A to Fig. 3 D is the layout drawing of the inner tube of the multitube rotary formula drying installation in the moisture-control grading system according to an embodiment of the invention;
The second inlet mouth that Fig. 4 A to Fig. 4 C is the multitube rotary formula drying installation in the moisture-control grading system according to an embodiment of the invention and the diagram of the second air outlet;
Fig. 5 has schematically shown the included vibration separation drying installation of moisture-control grading system according to an embodiment of the invention;
Fig. 6 has schematically shown vertical view and the gas flow of the local structure of the vibration separation drying installation in moisture-control grading system according to an embodiment of the invention.
Embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 1 has schematically shown moisture-control grading system and corresponding technical process according to an embodiment of the invention.As seen from Figure 1, the moisture-control grading system mainly comprises multitube rotary formula drying installation 31, vibration separation drying installation 32 and other assembly according to an embodiment of the invention.
Fig. 2 has schematically shown the included multitube rotary formula drying installation of moisture-control grading system according to an embodiment of the invention; Fig. 3 A to Fig. 3 D is the layout drawing of the inner tube of the multitube rotary formula drying installation in the moisture-control grading system according to an embodiment of the invention; The second inlet mouth that Fig. 4 A to Fig. 4 C is the multitube rotary formula drying installation in the moisture-control grading system according to an embodiment of the invention and the diagram of the second air outlet.
At first referring to Fig. 2, Fig. 3 A to Fig. 3 D and Fig. 4 A to Fig. 4 C, the multitube rotary formula drying installation 31 of exchanging in the hygroscopic water level system describes.
Multitube rotary formula drying installation 31 mainly comprises according to an embodiment of the invention: feed bin 1, and material to be dried enters drying installation by feed bin 1; Weight dumper 3, be positioned under feed bin 1, for receiving the material from feed bin 1, and material sent in the overcoat of screw feeder 5; The first inlet mouth 4, be arranged on the bottom of weight dumper 3, and the gaseous state drying medium enters and contacted with material to be dried by the first inlet mouth 4; Screw feeder 5, be arranged on the first inlet mouth 4 belows and be arranged on the front end of rotating cylinder 6, to receive from the material of weight dumper 3 with from the gaseous state drying medium of the first inlet mouth 4, and material sent in rotating cylinder 6; Two traversing mechanisms 22, be separately positioned on material upstream end and the material outlet end of rotating cylinder 6, the traversing mechanism 22 of material upstream end is connected with rotating cylinder 6 bearings with the overcoat of screw feeder 5, and the traversing mechanism 22 of material outlet end is connected with rotating cylinder 6 bearings with the second inlet mouth 15; Rotating cylinder 6, receive the gaseous state drying medium and, from the material of screw feeder 5, rotating cylinder 6 can rotate, thereby the materials in rotating cylinder 6 are moved thereupon; The first air outlet 12, the gaseous state drying medium passed into from the first inlet mouth 4 is discharged from the first air outlet 12 material is carried out to drying; The second inlet mouth 15, be arranged on the traversing mechanism 22 of described material outlet end; Inner tube 8, be arranged in rotating cylinder 6, receives the second drying medium from the second inlet mouth 15; The second air outlet 17, the second drying medium that enters inner tube 8 is discharged from the second air outlet 17; Cylindrical shell feed opening 21, be arranged on the exit end of rotating cylinder 6, and dried material is discharged by cylindrical shell feed opening 21.
According to an embodiment of the invention two channels multitube rotary formula drying installation 31 the material upstream end have bucket shape feed bin 1, be placed in rotary pocket feeder 2, weight dumper 3 and the screw feeder 5 of the lower end outlet of feed bin 1.Material to be dried is put into from feed bin 1, and rotary pocket feeder 2 one ends are connected to the outlet of feed bin 1 bottom, and the entrance of the other end and weight dumper 3 closely cooperates.Weight dumper 3 bottoms are provided with the first inlet mouth 4 of drying medium (for example, flue gas).Screw feeder 5 is positioned at the inlet end of rotating cylinder 6, and the overcoat of screw feeder 5 closely is connected with the outlet of weight dumper 3.
Multitube rotary formula drying installation 31 has two traversing mechanisms 22 according to an embodiment of the invention, is separately positioned on the two ends (that is, material upstream end and material outlet end) of rotating cylinder 6.Traversing mechanism 22 can be a bearing, comprises bearing inner race, bearing outer ring and ball bearing mechanism between the two, and bearing outer ring is rotatable with respect to bearing inner race.The traversing mechanism 22 of material upstream end is connected with rotating cylinder 6 bearings with the overcoat of screw feeder 5.Specifically, the overcoat of screw feeder 5 is fixedly connected with the bearing inner race of traversing mechanism 22, and rotating cylinder 6 is fixedly connected with the bearing outer ring of traversing mechanism 22, and bearing outer ring can move with respect to bearing inner race.The second inlet mouth 15 has two arms, described arm is connected with the bearing outer ring of the traversing mechanism 22 of material outlet end, the end of rotating cylinder 6 is connected with the bearing inner race of traversing mechanism 22, the position be connected with two arms on bearing outer ring is provided with corresponding hole, so that the drying medium passed into from described two arms can pass bearing outer ring.Also be respectively arranged with two holes on bearing inner race and the rotating cylinder 6 that is attached thereto, thereby can enter rotating cylinder 6 from the liquid state of described arm input and/or the drying medium of gaseous state.Ball bearing mechanism is arranged on two ends of bearing and, between bearing outer ring and bearing inner race, therefore can block the hole on bearing inner race and bearing outer ring by sealing mechanism.
Multilayer inner tube 8 is arranged in rotating cylinder 6.The drying medium of liquid state and/or gaseous state also can pass into the second inlet mouth 15 on the traversing mechanism 22 of the material outlet end that is arranged on rotating cylinder 6, then enter inner tube 8 (inner tube 8 can comprise the first inner tube 24, the second inner tube 25 and the 3rd inner tube 26) through intake hood 14, then the end at rotating cylinder 6 imports pipe core 23 (referring to Fig. 3 D, also can be referred to as " return pipe "), drying medium, after inner tube 8 and the interior heat exchange of pipe core 23, is discharged through the second air outlet 17 by swivel joint 16.
The internal surface of rotating cylinder 6 is provided with the scraper plate of staggered arrangement, in rotating cylinder 6 rotation processes, scraper plate falls after material to be dried can being promoted to certain altitude, then with inner tube 8, contact or from passing through near it, thereby increased the duration of contact of the drying medium in material and inner tube 8, improved drying efficiency.
Fig. 5 has schematically shown the included vibration separation drying installation 32 of moisture-control grading system according to an embodiment of the invention.Fig. 6 schematically shows vertical view and the gas flow of the local structure of the vibration separation drying installation 32 in moisture-control grading system according to an embodiment of the invention.
Below with reference to Fig. 5 and Fig. 6, the vibration separation drying installation 32 in moisture-control grading system is according to an embodiment of the invention described.
Vibration separation drying installation 32 mainly comprises according to an embodiment of the invention: feed bin 600, and material to be dried falls in casing 300 by feed bin 600; Inlet mouth 900, for passing into drying medium; Casing 300, be connected with inlet mouth 900, receives the drying medium passed into from inlet mouth 900 and the material entered from feed bin 600; Multi-layer bar bar grizzl(e)y 200, be arranged in casing 300, the drying medium drying that material to be dried is passed into from inlet mouth 900 on described multi-layer bar bar grizzl(e)y 200; Feed bin 1400 after sieve, feed bin 1400 material leaked down from described multi-layer bar bar grizzl(e)y 200 falls into and sieves; Screen underflow outlet 1500, be connected with feed bin 1400 after sieve, ejects the material of feed bin 1400 after sieve; Screen overflow exports 1600, is arranged on the end of casing 300, discharges the material stayed on bar screen 200.
Vibration separation drying installation 32 also comprises rotary pocket feeder 700 and the weight dumper 800 that is arranged on feed bin 600 belows according to an embodiment of the invention.Weight dumper 800 comprises weight and the baffle plate pivotally connected with weight, after only having the weight of the material accumulated on baffle plate to reach preset value, thereby baffle plate just is depressed and unloads the material on lower baffle plate, after material on dischargeing baffle plate, weight can make baffle plate automatically reset as counterweight, with the sealing discharge port.Rotary pocket feeder 700 is connected with weight dumper 800, enters into feed bin 600 to prevent the flue gas passed into by inlet mouth 900, thereby has reduced calorific loss.
Vibration separation drying installation 32 also comprises the afterbody gas tank 1700 be communicated with inlet mouth 900 and the both sides gas tank 1800 be communicated with afterbody gas tank 1700 according to an embodiment of the invention, both sides gas tank 1800 extends along the both sides of casing 300, and drying medium flows into both sides gas tank 1800 through afterbody gas tank 1700 from inlet mouth 900.
Vibration separation drying installation 32 also comprises the vibrator 1200 be connected with casing 300 according to an embodiment of the invention, under the drive of vibrator 1200, and described multi-layer bar bar grizzl(e)y 200 vibration work.
Vibration separation drying installation 32 also comprises the flat deceleration strip 500 be arranged in casing 300 according to an embodiment of the invention, and it is between described multi-layer bar bar grizzl(e)y 200 and inlet mouth 900.Be provided with vertical exhanst gas outlet group 400 below flat deceleration strip 500, the drying medium passed into from both sides gas tank 1800, through the upwards ejection of vertical exhanst gas outlet group 400, carries out drying to the material on flat deceleration strip 500.
Every layer of bar screen 200 in described multi-layer bar bar grizzl(e)y 200 includes tubular body arranged inside and is connected to many rods on tubular body arranged inside.Described drying installation also comprises the horizontal exhanst gas outlet group 1900 be arranged on described tubular body arranged inside, and the drying medium passed into from both sides gas tank 1800 flatly sprays through horizontal exhanst gas outlet group 1900, and the material on described multi-layer bar bar grizzl(e)y 200 is carried out to drying.
The height of each layer of bar screen in described multi-layer bar bar grizzl(e)y 200 is not identical, presses height placement from high to low from the entrance of material to the outlet of material on the whole.
Vibration separation drying installation 32 high vibration under the drive of vibrator 1200 according to an embodiment of the invention, thereby make material automatically slide into bar screen 200 from flat deceleration strip 500, bar screen 200 motions of the layer that the bar screen 200 of higher layer is lower to position from position, finally discharge.
Referring to Fig. 1, Fig. 2 and Fig. 5, the moisture-control grading system of material comprises according to an embodiment of the invention: the drying medium feeding means, be connected to multitube rotary formula drying installation, and carry and be used for the withering drying medium of material; Multitube rotary formula drying installation 31, receive pending material and from the drying medium of drying medium feeding means, described multitube rotary formula drying installation 31 comprises can rotating rotating cylinder 6, rotating cylinder 6 inboards have can drive the scraper plate that material moves together, and the material after being dried is discharged to vibration separation drying installation 32 by cylindrical shell feed opening 21; Vibration separation drying installation 32, vibration separation drying installation 32 is connected with the cylindrical shell feed opening 21 of multitube rotary formula drying installation 31, receives through multitube rotary formula drying installation 31 dried materials, and material is carried out to the gradation processing; The drying medium flow rate control device, the amount that enters the drying medium of multitube rotary formula drying installation 31 and vibration separation drying installation 32 for control.
Wherein, described drying medium feeding means can comprise waste gas induced draft fan 512, and it can be introduced for example coke oven flue waste gas (200～300 ℃) in multitube rotary formula drying installation 31.Described drying medium feeding means can also be connected to vibration separation drying installation 32, for material is carried out to further drying.
Described multitube rotary formula drying installation 31 and/or vibration separation drying installation 32 comprise the feed unit that can lock gas, as described above, and this feed unit comprises feed bin, material feeder and weight dumper.
Described drying medium flow control system comprises at least one valve 510 and at least one flow director 59, and it can control two drying medium input apertures 4,15 of multitube rotary formula drying installation 31 and a drying medium input aperture 900 of vibration separation drying installation 32.Form, temperature and stock number according to drying medium, the input of the drying medium of two kinds of different shapes (gaseous state, liquid state) of three input apertures of drying medium flow control system comprehensive matching, can with liquid medium, come dry separately, perhaps use separately the gaseous medium drying, also can use two kinds of drying mediums simultaneously, can rationally control the amount of drying medium when assurance reaches the expection adjustment humidity of material, reduce costs.For example, enter vibration separation drying installation 32 through the dried material of rotating cylinder 6.Now, according to the moisture situation of coal dust reality and the requirement of specific occasion, determine whether to carry out further drying.In the time of need to carrying out further drying, open the valve 510 be connected with the inlet mouth 900 of vibration separation drying installation 32 ends, coke oven flue waste gas is passed into by inlet mouth 900, coal dust is carried out to further drying.Can regulate by flow director 59 flow of drying medium, while needing strong drying, with regard to enlargement discharge.
Below will, referring again to Fig. 1, Fig. 2 and Fig. 5, describe technical process according to an embodiment of the invention in detail.
Embodiment mono-:
(for example treat the material of damping, coal dust) through conveyor 52, be delivered in the feed bin 1 of multitube rotary formula drying installation 31, then material can prevent that drying medium from contacting with the coke oven flue waste gas (200～300 ℃) of introducing through the first inlet mouth 4 by waste gas induced draft fan 512 in entering the feeding system of feed bin 1, thereby material is carried out to drying.Due to the rotating cylinder 6 of rotary type drying installation 31 and horizontal direction at an angle, and, under the promotion of the rotation of rotating cylinder 6 and coke oven flue waste gas, material is mobile towards the cylindrical shell feed opening 21 of rotary type drying installation 31.Rotating cylinder 6 inside are provided with scraper plate, and material constantly is brought to the top of rotating cylinder 6 in the process moved down, and in the effect of gravity, drop to bottom.In addition, the tube wall heating of the drying medium passed into via the second inlet mouth 15 (for example, coke oven flue waste gas etc.) to inner tube 8, further to carry out drying to coal dust.Specifically, material contacts with the inner tube 8 in rotating cylinder 6 in dropping process, thereby is further dried.The input-output system of inner tube 8 relatively independent and the sealing, also can pass into water vapour.The gaseous state drying medium passed into from the first inlet mouth 4 is discharged from the first air outlet 12 with steam, volatile matter and dust from material.The drying medium passed into from the second inlet mouth 15 is discharged from the second air outlet 17, from the first air outlet 12 and the second air outlet 17 expellant gas, volatile matter, dust, after fly-ash separator 54 dedustings, by chimney 55, discharges.
Enter vibration separation drying installation 32 through the dried coal dust of rotating cylinder 6, depending on the moisture situation decision of coal dust, whether carry out further drying.Need to carry out when further dry, coke oven flue waste gas is passed into by the inlet mouth 900 of vibration separation drying installation 32 ends, and material is carried out after drying being discharged from after water vapour, volatile matter from coal dust enters fly-ash separator 54 dedustings together with dust.Material in the vibration separation drying installation is after vibrosieve, and material is divided at least two kinds by granular size.The satisfactory finished bin that enters of globule size is stored, for coke oven production; Undersized, the coal dust that does not meet the requirement of coke oven material loading enters the rear feed bin 1400 of sieve, after discharge, by another feed bin, is collected, and supplies with his and uses.
Embodiment bis-:
The material (for example, coal dust etc.) for the treatment of damping is delivered in feed bin 1 through conveyor 52, enters the feed bin 1 of feed unit, by the first inlet mouth 4, introduces high-temp waste gas (for example, 500 ℃ of left and right).High-temp waste gas carries out drying to coal dust, may make the interior water content of coal dust too low, when the oxygen content in rotating cylinder 6 reaches certain content, may cause fine breeze to cause burning or blast.Therefore, in order to prevent the phenomenon of burning or blast, also pass into a certain amount of rare gas element (for example, nitrogen) and regulated in rotating cylinder 6.Can also pass into water coolant from the second inlet mouth 15 in case of necessity, overheated to prevent the material in rotating cylinder 6.
By regulating flue gas flow, reach the damping requirement at the interior coal dust after high temperature flue gas drying of rotating cylinder 6, enter vibration separation drying installation 32, carry out vibration separation.Coal dust in the vibration separation dehumidification system is after vibrosieve, and the satisfactory coal dust of globule size enters finished bin and stores, for coke oven production; Undersized, the coal dust that does not meet the requirement of coke oven material loading enter feed bin 1400 after sieve, after discharge, by another feed bin, are collected, and reserve for other use.
According to material moisture-control grading system of the present invention and moisture-control grading method, be characterized in carrying out continuously in enormous quantities the processing of material moisture-control grading, simultaneously can be according to the Capability Requirement of coking production, be equipped with separate unit or many table apparatus, the processing power of unitary device can be in the scope of 10～80t/h.
According to material moisture-control grading system of the present invention and moisture-control grading method, the degree of drying of coking coal powder can reach 6% from 7%～12% drying.
According to material moisture-control grading system of the present invention and moisture-control grading method, the minimum particle size of vibration separation can be set and be adjusted in conjunction with running cost according to production requirement.
According to material moisture-control grading system of the present invention and moisture-control grading method, dried gaseous media is processed through flue gas purification system, removes the dust and the volatile matter that volatilize in drying process, guarantees the flue gas non-pollution discharge.
Be not limited to process coal dust according to material moisture-control grading system of the present invention and moisture-control grading method, can also process other needs dry material, for example, and breeze etc.
Although the above has described exemplary embodiment of the present invention in detail, there is in the technical field of the invention common practise person without departing from the spirit and scope of the present invention, can make various modifications, retouching and modification to embodiments of the invention.But should be appreciated that In the view of those skilled in the art, these modifications, retouching and modification will fall in the spirit and scope of the exemplary embodiment of the present invention that claim limits.
Finally, unless point out here or in addition with the obvious contradiction of context, otherwise methodical step described herein can be with the order execution of any appropriate.
Claims (17)
1. the damping of a material and hierarchy system comprise:
The drying medium feeding means, be connected to multitube rotary formula drying installation, carries and be used for the withering drying medium of material;
Multitube rotary formula drying installation, comprise material inlet, inner tube, can rotating rotating cylinder, the first drying medium entrance, the second drying medium entrance, the first drying medium outlet, the second drying medium outlet and cylindrical shell feed opening, multitube rotary formula drying installation receives pending material by material inlet and receives from the first drying medium of drying medium feeding means input by the first drying medium entrance, described inner tube receives from the second drying medium of drying medium feeding means input by the second drying medium entrance, material after being dried is discharged to the vibration separation drying installation by the cylindrical shell feed opening, the first drying medium and discharging by the first drying medium outlet from the water vapour of material, the second drying medium is discharged by the second drying medium outlet,
The vibration separation drying installation, be connected with the cylindrical shell feed opening of multitube rotary formula drying installation, receives through the dried material of multitube rotary formula drying installation, and the vibration separation drying installation has screening plant, and material is carried out to the gradation processing;
The drying medium flow rate control device, the amount that enters the drying medium of multitube rotary formula drying installation and/or vibration separation drying installation for control.
2. the damping of material according to claim 1 and hierarchy system, wherein, the drying medium feeding means is also connected to the vibration separation drying installation, for to the vibration separation drying installation, passing into drying medium.
3. the damping of material according to claim 1 and 2 and hierarchy system, wherein, described drying medium flow rate control device comprises at least one valve and at least one flow director, the amount for control inputs to the drying medium of multitube rotary formula drying installation and/or vibration separation drying installation.
4. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
Multitube rotary formula drying installation and vibration separation drying installation comprise feed unit, and described feed unit comprises feed bin, material feeder and weight dumper.
5. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
Determine whether according to the temperature of the drying medium that passes into multitube rotary formula drying installation the amount that passes into rare gas element and pass into rare gas element, cause while preventing the drying medium excess Temperature that material is rotten or explode.
6. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
Described rotating cylinder inboard has can drive the scraper plate that material moves together, by the revolution of drying cylinder, falls after being reach a certain height by scraper flight animal material, and arrive bottom of cylinder after multilayer inner tube heat exchange drying, to realize the drying of material.
7. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
According to the kind of drying medium, single exhaust emissions pipeline is set, or gaseous state drying medium discharge pipe and liquid drying medium discharge pipe are set respectively.
8. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
The water vapour, volatile matter and the dust that in the gaseous state drying medium directly contacted with material discharged by the first drying medium outlet and drying process, produce are introduced smoke stack emission after the dust treatment system purification.
9. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
After vibration separation drying installation vibrosieve, make the coal dust of size fractionated enter different feed bins, therefrom obtain the coal dust of expection humidity and granularity.
10. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
The rotating cylinder of rotary type drying installation is with respect to the horizontal direction certain angle that tilts.
11. the damping of material according to claim 1 and 2 and hierarchy system, wherein,
Described screening plant is the multi-layer bar bar grizzl(e)y, and each layer of bar screen in described multi-layer bar bar grizzl(e)y pressed height placement from high to low from the entrance of material to the outlet of material.
12. a utilization is carried out the method for damping and classification as damping and the hierarchy system of the described material of any one in claim 1-11 to material, comprising:
To treat that the mass transport of damping is to the feed bin of multitube rotary type drying installation, input the first drying medium of the second drying medium and gaseous state from the drying medium feeding means, then make material contact with the tube wall of inner tube and the first drying medium of gaseous state, the second drying medium drying that material is passed in the first drying medium of gaseous state and described inner tube;
Be discharged to the vibration separation drying installation through the dried material of multitube rotary formula drying installation from the cylindrical shell feed opening, whether determine that according to the moisture situation of material passing into drying medium from the drying medium entrance of vibration separation drying installation carries out further drying, utilize the screening plant of vibration separation drying installation to carry out vibrosieve to material, by granular size, material is divided into at least two kinds, is transported to respectively different feed bins.
13. method according to claim 12 also comprises:
Material is carried out to dried drying medium discharges after together with water vapour, volatile matter and dust from material, entering the fly-ash separator dedusting.
14. method according to claim 12 also comprises:
Pass into the second liquid drying medium in inner tube, by making material, contact with tube wall and material is carried out to drying.
15. method according to claim 12 also comprises:
Also pass into a certain amount of rare gas element and regulated in rotating cylinder, to prevent material burning or blast.
16. method according to claim 12 also comprises:
When the material in rotating cylinder is overheated, pass into water coolant in inner tube.
17. method according to claim 12 also comprises:
Regulate the flow of drying medium by the drying medium flow rate control device, make dried material reach the damping requirement of setting.
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