CN105057218B - A kind of new dry coal preparation system and method - Google Patents

Abstract

The invention provides the new dry coal preparation system and method for a kind, including frame, run coal bin, the overhead rotary screen of the first order, the broken machine in thick Hubei Province, the overhead rotary screen in the second level, the broken machine in thin Hubei Province, raw material cabin, the broken sorting bed of first order sieve, second level sieve broken sorting bed, dedusting sorting bed, desulfurization sorting bed, the first spray system, the second spray system are fixed with described frame, various dry separation principles are combined together, realize serial multipass sort, improve coal separation precision and ratio defective product, coal separation yield；Powder material suitably uses gravity selection by winnowing principle, eliminates lower limit of separation；The system adaptability aqueous to material is improve, the moisture evaporation process in material is accelerated, drying materials technique is eliminated, sorting process system is simplified.The effect of round-the-clock efficient dry separation production is ensure that, annual sorting production capacity is improve.

Description

A kind of new dry coal preparation system and method

Technical field

The invention belongs to mechanical coal preparation technology field, and in particular to a kind of new dry process Recognition Applied in Coal Preparation System and method.

Background technology

Used as China's main energy sources, its burning is utilized and the contradiction between environmental pollution coal, has increasingly been political affairs at different levels Mansion and the numerous common people are of interest.Carry out clean coal technology, Reasonable Utilizing Its Coal Resources improve coal quantity, reduce disposal of pollutants, The matter of utmost importance of each coal industry enterprise's existence and development is turned into.In order to improve coal quantity and adequately and reasonably utilize, people Develop the screening installation of various raw coal（System）And method.

Coal washing is one of application of clean coal technology, and the technology is that raw coal is separated into cleaned coal and cash by sorting Stone, improves coal purity, and desulfurization and deashing reduces disposal of pollutants, increases attached value.

At present, mainly wet split and dry separation, and wet split is due to its demand and waste for water resource It is larger, in addition wet method dense medium sorting process reclaim it is undesirable caused by not environmentally, the easy argillization of part coal, investment is high, run into This height, construction period shortcoming long, gradually by dry coal preparation equipment（System）Replaced with method, --- also known as efficient dry method Coal separation.Because dry coal preparation need not use water, in the absence of the pollution environment for repeating, and production cost has larger reduction, efficiently dry Method coal separation is increasingly becoming the main development direction of current raw coal separation, is put into state key emerging strategic industries and instructs mesh Record.

But current dry coal preparation technology is typically only from the separator of single-stage（The horizontal separator of combined type dry method, weight Medium fluidized bed separator, differential type dry separation bed）Sorted, have that sharpness of separation is low, yield poorly and to coal requirement compared with Defect high, and, there is the middle coal between cleaned coal and spoil in combined type, differential type（Account for whole discharge rate Production marketing is cannot function as under 35%, and most of situations）, ratio defective product is greatly reduced, improve the cost of repetition sorting, system The about development of dry separation technology.

The content of the invention

In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of sharpness of separation is high, region is fitted Answering property is good and ratio defective product is high, while the dry coal preparation system and method for the sorting of fine ash dirt and desulfurization can be realized.

In order to achieve the above object, the technical scheme taken of the present invention is：A kind of new dry coal preparation system, including machine Frame, run coal bin is fixed with the overhead rotary screen of the first order, the broken machine in thick Hubei Province, the overhead rotary screen in the second level, thin Hubei Province and breaks in described frame Machine, raw material cabin, the broken sorting bed of first order sieve, the broken sorting bed of second level sieve, dedusting sorting bed, desulfurization sorting bed, the first spray system System, the second spray system；

The oscillating feeder that described run coal bin bottom is installed passes through raw coal with the upper entrance of the overhead rotary screen of the first order Conveyer couples, and first branch that is arranged right below of the particle outlet less than 30mm of the overhead rotary screen of the first order conveys Machine, the broken machine in described thick Hubei Province is located at the underface of the particle outlet more than 30mm of the overhead rotary screen of the first order, described thick Hubei Province The outlet of broken machine coupled by the first elevator with the overhead rotary screen in the second level, and the overhead rotary screen in the described second level is less than The particle outlet of 30mm is arranged right below the second branching conveyer, and the broken machine in described thin Hubei Province is located at the overhead rotary screen in the second level The underface of the particle outlet more than 30mm, what the broken machine in described thin Hubei Province was exported is arranged right below the 3rd branching conveyer；

Set immediately below described the first branching conveyer, the second branching conveyer, the output end of the 3rd branching conveyer The output end for having the 4th branching conveyer, the 4th described branching conveyer is located at the surface of raw material cabin；

The second elevator and the broken sorting bed top of first order sieve below the outlet of the oscillating feeder of the raw material cabin bottom Portion's entrance connection, the 3rd elevator being arranged right below of the oversize outlet of the broken sorting bed of first order sieve is sieved with the second level The entrance connection of broken sorting bed, the waste residue the being arranged right below output that the oversize of the described broken sorting bed of second level sieve is exported is defeated Machine is sent to couple with the first spray system, described first order sieve breaks the screenings outlet of sorting bed and the broken sorting bed of second level sieve It is arranged right below roughing cleaned coal conveyer；

The 4th elevator being arranged right below of the roughing cleaned coal conveyer output end couples with dedusting sorting bed, described The 5th elevator that is provided with of cleaned coal outlet lower section of dedusting sorting bed is connected with desulfurization sorting bed, described dedusting sorting bed, takes off The waste outlet of sulphur sorting bed is arranged right below discarded object conveyer, immediately below the cleaned coal outlet of described desulfurization sorting bed The output end of the cleaned coal conveyer being provided with couples with the second spray system.

The described broken sorting bed of first order sieve and the broken sorting bed of first order sieve is the broken sorting bed of same sieve, the broken sorting of the sieve Bed at least includes that a seal case, the both sides of the seal case are fixed with vertical frame column, and the top of described seal case I is opened Feeding mouth is provided with, the bottom of seal case offers oversize outlet and screenings outlet, is provided with described seal case Rotary screen and bottom roll are sieved, and feeding mouth is located at the center line of the surface of upper rotary screen, the upper rotary screen and bottom roll sieve In same vertical plane, and the end oversize outlet of upper rotary screen is located at the middle part that bottom roll is sieved, described lower rolling The screenings that the outlet of the oversize of shaft screen end is sieved positioned at the surface of oversize outlet, described upper rotary screen and bottom roll It is imported into screenings outlet by inclining the screenings guide plate being located at below upper rotary screen and bottom roll sieve, described screenings Guide plate upper end is fixed on the inwall of seal case, and the lower end of the screenings guide plate is located at the surface of screenings outlet, described The width of screenings guide plate be equal to or more than the width that upper rotary screen and bottom roll are sieved, and the one side of screenings guide plate with it is upper Rotary screen and bottom roll sieve end are located on same vertical plane, and described upper rotary screen and bottom roll sieve one end and be arranged on for band The motor reducer that dynamic upper rotary screen and bottom roll sieve are rotated, the motor reducer is fixedly mounted in frame.

Described dedusting sorting bed at least includes a seal case II and the whirlwind collector being connected with seal case II, institute The top of the seal case II stated is provided with semi-finished product feeding mouth, and the bottom of described seal case II is provided with what is separated by baffle plate Particle coal export and fine ash are exported, and the bottom of described whirlwind collector is provided with fine coal export；

Rotary screen distributing device is provided with inside described seal case II, the rotary screen distributing device is located at semi-finished product feeding mouth Underface, the outlet of described rotary screen distributing device end is located at the surface of particle coal export, the described He of seal case II Whirlwind collector is turned on by being located at the duff collecting bin of joint sealing body II and whirlwind collector junction, the duff collecting bin it is upper Under be respectively provided with the exhaust column duff in duff collecting bin being extracted into whirlwind collector, the exhaust column and seal case The II air exhauster connection being externally provided with, air blast comb is additionally provided with described seal case II, and the air blast comb is reclaimed positioned at duff On the inwall of the relative seal case II of mouth, the air blower that described air blast comb is externally provided with seal case II is connected, described Whirlwind collector in vertical be provided with through its top and extend to the exhaust duct outside whirlwind collector, described rotary screen cloth Device is driven by rack-mounted motor reducer and rotated.

Described desulfurization sorting bed at least includes a vertical sealed casing, and charging is provided with the top of the vertical sealed casing Mouthful, intersection is provided with the broken rolling of one-level selective crushing rotary screen, Second Order Selectivity to vertical sealed box house successively from top to bottom Shaft screen, three-level selective crushing rotary screen, the feeding mouth of the one-level selective crushing rotary screen are located at the underface of charging aperture, The feeding mouth that the oversize discharging opening of the one-level selective crushing rotary screen is sieved with Second Order Selectivity crushing roller, described two grades The discharging opening oversize of selective crushing rotary screen is connected with the feeding mouth of three-level selective crushing rotary screen by guide plate, described The oversize discharging opening that is provided with vertical sealed bottom half of oversize discharging opening of three-level selective crushing rotary screen pass through Guide plate is connected；

Described one-level selective crushing rotary screen, Second Order Selectivity crushing roller sieve, three-level selective crushing rotary screen Screenings discharging opening immediately below be respectively equipped with electromagnetic cylinder, the lower section immediately ahead of the electromagnetic cylinder is provided with thin material collection Cylinder, the rear of the thin material collection cylinder is provided with ferrous contaminants surge drum, and the thin material in described thin material collection cylinder is by setting The thin material outlet being provided with vertical sealed box body wall is derived, and the ferrous contaminants material in described ferrous contaminants surge drum leads to The output screw output being located in iron tramp surge drum and extend to outside vertical sealed casing is crossed to arrive outside vertical sealed casing；

Described one-level selective crushing rotary screen, Second Order Selectivity crushing roller sieve, three-level selective crushing rotary screen Driven by the motor reducer that vertical sealed casing is externally provided with electromagnetic cylinder and rotated.

Connected by baffle plate between the bottom of the screenings guide plate that described bottom roll sieve lower section is provided with and screenings outlet, Described vertical frame column is provided with maintenance platform.

Control particle coal export, thin is respectively provided with described particle coal export, fine ash outlet and fine coal export Ash outlet and fine coal export folding and the rigid impeller of sealing closed, described exhaust column are provided with helical fin.

Described one-level selective crushing rotary screen, Second Order Selectivity crushing roller sieve, three-level selective crushing rotary screen It is same selective crushing rotary screen, the selective crushing rotary screen at least includes a drive shaft and cylindrical screen cage；It is described Cylindrical screen cage be connected on two circumference of end face steel ring by two end face steel rings, uniformly, and with two end face steel rings it Between centerline parallel multiple micro- broken roller and the mesh screen composition that is wrapped on micro- broken roller, described drive shaft passes through cylindrical screen Cage end face is simultaneously fixedly connected by the connection muscle that cylindrical screen cage end face is provided with, and in the axial direction of the drive shaft and cylindrical screen cage Heart line is located on the same line, and described mesh screen is fixed on micro- broken roller, described drive shaft and vertical sealed casing peripheral hardware The rotary shaft connection of some motor reducers.

A kind of dry coal preparation method, comprises the following steps：

Step one, pretreatment of raw material：Raw coal in run coal bin is transported to the overhead rotary screen of the first order by raw coal conveyer In, being fallen into the broken machine in thick Hubei Province by the particle after the overhead rotary screen of the first order is screened more than 30mm and crushed, the first order is overhead Dropped on the belt of the first branching conveyer less than the particle of 30mm after rotary screen screening, by after the broken crusher machine in thick Hubei Province Grain is entered into the overhead rotary screen in the second level by the first elevator, is more than 30mm's after the overhead rotary screen in the second level is screened Particle falls into the broken machine in thin Hubei Province and is crushed, and the particle after the overhead rotary screen screening in the second level less than 30mm drops into the second branch On the belt of conveyer, dropped on the belt of the 3rd branching conveyer through the particle after the broken crusher machine in meticulous Hubei Province, the first branch Particle on conveyer, the second branching conveyer, the 3rd branching conveyer belt is dropped on the 4th branching conveyer, and is transported It is defeated in raw material cabin；

Step 2, roughing cleaned coal：Particulate coal in raw material cabin is transported to the first order and sieves broken sorting bed by the second elevator In sieve brokenly sorting, the screenings of the broken sorting bed of first order sieve is dropped on the belt of roughing cleaned coal conveyer, first order sieve The oversize of broken sorting bed is dropped into the 3rd elevator and transported in the broken sorting bed of the second sieve and carries out sieving brokenly sorting, the second level The screenings of the broken sorting bed of sieve is dropped on the belt of roughing cleaned coal conveyer, and oversize drops into the skin that waste residue exports conveyer Take, the roughing cleaned coal fallen on roughing cleaned coal conveyer is sent in dedusting sorting bed by the 4th elevator, waste residue output Waste residue and middle coal on conveyer are transported and carry out spray process in the first spray system；

Step 3, selected finished product cleaned coal, the roughing cleaned coal entered into dedusting sorting bed carries out dedusting, by after dedusting Semi-finished product cleaned coal is entered into by the 5th elevator and desulfurization screening is carried out in desulfurization sorting bed, by dedusting sorting bed and desulfurization point The discarded object for selecting bed to sub-elect is dropped into and exported on the belt of discarded object output machine, by the finished product essence after desulfurization sorting bed desulfurization Coal is transported in the second spray system by cleaned coal conveyer and carries out spray process, by the finished product cleaned coal after spray process be institute The cleaned coal for needing.

The present invention uses above technical scheme, with advantages below：

1st, various dry separation principles are combined together, realize serial multipass sort, improve coal separation precision and product Product rate, while improve coal separation yield.

2nd, the roughing cleaned coal after the broken formula of sieve is sorted, only ash content containing fine powder, suitably using gravity selection by winnowing principle, eliminate and divide Select lower limit.

3rd, by the broken circulation conveying of sieve, the system adaptability aqueous to material is improve, the moisture accelerated in material is waved Hair process, eliminates drying materials technique, simplifies sorting process system.Ensure that the effect of round-the-clock efficient dry separation production Really, improve annual sorting production capacity.

4th, magnetic separation is only effective to fine particle.The present invention provides material environment the most suitable for magnetic separation so that Qiang Ci Sorting function is able to fully realize.

Brief description of the drawings

Fig. 1：Process chart of the invention；

Fig. 2：The broken sorting bed structural representation of sieve；

Fig. 3：Dedusting sorts bed structure schematic diagram；

Fig. 4：Desulfurization sorting bed structural representation；

Fig. 5：Selective crushing rotary screen structural representation.

In figure：1. run coal bin；2. raw coal conveyer；3. the overhead rotary screen of the first order；4. the first branching conveyer；5. thick Hubei Province Broken machine；6. the first elevator；7. the overhead rotary screen in the second level；8. machine is broken in thin Hubei Province；9. the second branching conveyer；10. the 3rd branch Conveyer；11. the 4th branching conveyers；12. raw material cabins；13. second elevators；The broken sorting bed of 14. first order sieve；15. the 3rd Elevator；The broken sorting bed of 16. second level sieve；17. waste residues export conveyer；18. roughing cleaned coal conveyers；19. the 4th elevators； 20. dedusting sorting beds；21. the 5th elevators；22. desulfurization sorting beds；23. discarded object conveyers；24. cleaned coal conveyers；25. One spray system；26. second spray systems；1401 seal cases I；1402. vertical frame columns；1403. feeding mouths；1404. sieves Upper thing outlet；1405. screenings are exported；Rotary screen on 1406.；1407. bottom rolls are sieved；1408. screenings guide plates；1409. gears Plate；1410. maintenance platforms；2001. seal cases II；2002. whirlwind collectors；2003. semi-finished product feeding mouths；2004. particles Coal export；2005. fine ash are exported；2006. rotary screen distributing devices；2007. duff collecting bins；2008. air blast combs；2009. take out Airduct；2010. fine coal exports；The rigid impeller of 2011. sealings；2012. helical fins；2201. vertical sealed casings；2202； Charging aperture；2203. one-level selective crushing rotary screens；2204. Second Order Selectivity crushing rollers are sieved；2205. three-levels are selectively broken Broken rotary screen；2206. guide plates；2207. oversize discharging openings；2208. electromagnetic cylinders；2209. thin material collection cylinders；2210. contain Iron tramp surge drum；2211. output screws；2212. drive shafts；2213. cylindrical screen cages；2214. mesh screens；2215. micro- broken rollers.

Specific embodiment

The present invention is described in detail with reference to the accompanying drawings and examples.

Embodiment 1

As shown in figure 1, a kind of new dry coal preparation system, including frame, run coal bin 1, it is fixed with described frame The overhead rotary screen 3 of the first order, the overhead rotary screen 7 of the broken machine 5, second level in thick Hubei Province, the broken machine 8 in thin Hubei Province, broken point of raw material cabin 12, first order sieve Select the bed 14, second level to sieve broken sorting bed 16, dedusting sorting bed 20, desulfurization sorting bed 22, the first spray system 25, second and spray system System 26；

The oscillating feeder that the described bottom of run coal bin 1 is installed passes through original with the upper entrance of the overhead rotary screen 3 of the first order Coal conveyer 2 couples, the particle outlet less than 30mm of the overhead rotary screen 3 of the first order to be arranged right below the first branch defeated Machine 4 is sent, the broken machine 5 in described thick Hubei Province is located at the underface of the particle outlet more than 30mm of the overhead rotary screen 3 of the first order, described The outlet of the thick broken machine 5 in Hubei Province is coupled by the first elevator 6 with the overhead rotary screen 7 in the second level, the overhead rotary screen 7 in the described second level The particle outlet less than 30mm be arranged right below the second branching conveyer 9, that the broken machine 8 in described thin Hubei Province is located at the second level is overhead The underface of the particle outlet more than 30mm of rotary screen 7, it is defeated that what the broken machine 8 in described thin Hubei Province was exported is arranged right below the 3rd branch Send machine 10；

Described the first branching conveyer 4, the second branching conveyer 9, the output end of the 3rd branching conveyer 10 just under Side is provided with the 4th branching conveyer 11, and the output end of the 4th described branching conveyer 11 is located at the surface of raw material cabin 12；

The second elevator 13 and the broken sorting of first order sieve below the outlet of the oscillating feeder of the bottom of the raw material cabin 12 Bed 14 top entries connection, the 3rd elevator 15 being arranged right below of the oversize outlet of the broken sorting bed 14 of first order sieve Entrance with the broken sorting bed 16 of second level sieve is connected, and the underface that the oversize of the described broken sorting bed 16 of second level sieve is exported sets Some waste residue output conveyers 17 couple with the first spray system 25, and the described broken sorting bed 14 of first order sieve and second level sieve are broken What the screenings of sorting bed 16 was exported is arranged right below roughing cleaned coal conveyer 18；

The 4th elevator 19 being arranged right below and dedusting sorting bed 20 of the output end of roughing cleaned coal conveyer 18 Connect, the 5th elevator 21 that the cleaned coal outlet lower section of the dedusting sorting bed 20 is provided with is connected with desulfurization sorting bed 22, described Dedusting sorting bed 20, the waste outlet of desulfurization sorting bed 22 are arranged right below discarded object conveyer 23, described desulfurization point Select the cleaned coal of bed 22 to export the output end of cleaned coal conveyer 24 being arranged right below to couple with the second spray system 26.

Run coal bin 1 uses buried installation, is fed in order to forklift, and the oscillating feeder that the bottom of run coal bin 1 is installed can be with Ensure to convey material on the quantitative belt to raw coal conveyer 2 of continuous-stable, material to be selected is delivered to the by raw coal conveyer 2 The overhead rotary screen 3 of one-level, the sieve will be less than 30 millimeters（Screenings）Material particles sift out to fall into and treat the first branching conveyer 4 On belt, the material particles that will be greater than 30 millimeters send into the broken machine 5 in thick Hubei Province, and the material after being processed through the broken machine 5 in thick Hubei Province falls into first and carries Machine 6 is risen, the overhead rotary screen 7 in the second level is later fallen into, the material particles less than 30 millimeters sift out the sieve to fall into the second branch defeated Send on the belt of machine 9, the material particles that will be greater than 30 millimeters send into the broken machine 8 in thin Hubei Province, and the material after being processed through the broken machine 8 in thin Hubei Province falls into On the belt of the 3rd branching conveyer 10, the first branching conveyer 4, the second branching conveyer 9, the skin of the 3rd branching conveyer 10 Take material to be aggregated on the 4th branching conveyer 11, in raw material cabin 12 is transported to, complete the preprocessing process of raw material；

The first order is transported to by the second elevator 13 by pretreated raw material in raw material cabin 12 and sieves broken sorting bed 14 In carry out acceleration of gravity plus the sorting of micro- broken combined type, the undersize material after screening falls the belt of roughing cleaned coal conveyer 18 On, oversize is entered into by the 3rd elevator 15 carries out acceleration of gravity again in the broken sorting bed 14 of first order sieve plus micro- breaking is answered Box-like sorting, the undersize material after screening is fallen on the belt of roughing cleaned coal conveyer 18, and it is defeated that oversize drops into waste residue output Send on machine 17, and be transported to the spray process of the first spray system 25；The roughing cleaned coal fallen on roughing cleaned coal conveyer 18 passes through The transport of 4th elevator 19 completes the process of roughing cleaned coal to dedusting sorting bed 20；

After feeding dedusting sorting bed 20 is through its sorting, fine ash is entered on the belt of discarded object conveyer 23, is sorted by dedusting What bed 20 was sub-elected selects cleaned coal to deliver to the 5th elevator 21 to be then sent to desulfurization sorting bed 22 again, through its sorting after, discarded object is defeated Send and discharged on the belt of machine 23, the cleaned coal sub-elected by desulfurization sorting bed 22 is transported to the second spray system by finished product conveyer 24 Hydro-peening treatment is carried out in system 26, the cleaned coal after the second spray system 26 is processed is final product as finished product cleaned coal.

The invention as seen through the above analysis is that the sharpness of separation for overcoming existing dry coal preparation technology to exist is low, area Domain bad adaptability and the low defect of ratio defective product；It is the lower limit of separation for fine dust for overcoming existing dry separation technology to exist Defect；There is provided simultaneously can efficiently through row dry desulfurization.

Embodiment 2

On the basis of embodiment 1, as shown in Fig. 2 the described broken sorting bed 14 of first order sieve and the broken sorting of first order sieve Bed 16 is the same broken sorting bed of sieve, and the broken sorting bed of the sieve at least includes a seal case I 1401, the seal case I 1401 Both sides are fixed with vertical frame column 1402, and the top of described seal case I 1401 offers feeding mouth 1403, seal case 1401 bottom offers oversize outlet 1404 and screenings outlet 1405, and rolling is provided with described seal case I 1401 Shaft screen 1406 and bottom roll sieve 1407, and feeding mouth 1403 is located at the surface of upper rotary screen 1406, the upper rotary screen 1406 Center line with bottom roll sieve 1407 is located in same vertical plane, and the end oversize outlet of upper rotary screen 1406 is located at The middle part of bottom roll sieve 1407, the outlet that described bottom roll sieves the oversize of 1407 ends is being located at oversize outlet 1404 just The screenings of top, described upper rotary screen 1406 and bottom roll sieve 1407 is located at upper rotary screen 1406 and bottom roll by inclination The screenings guide plate 1408 of the lower section of sieve 1407 is imported into screenings outlet 1405, and the described upper end of screenings guide plate 1408 is fixed On the inwall of seal case 1401, the lower end of the screenings guide plate 1408 is located at the surface of screenings outlet 1405, described The width of screenings guide plate 1408 be equal to or more than the width of upper rotary screen 1406 and bottom roll sieve 1407, and screenings guide plate 1408 one side sieves 1407 ends and is located on same vertical plane with upper rotary screen 1406 and bottom roll, described upper rotary screen 1406 and bottom roll sieve 1407 one end be arranged on for drive rotary screen 1406 and bottom roll sieve 1407 rotate decelerating through motor Machine, the motor reducer is fixedly mounted in frame；The screenings guide plate 1408 that the described lower section of bottom roll sieve 1407 is provided with Connected by baffle plate 1409 between bottom and screenings outlet 1405, described vertical frame column 1402 is provided with maintenance platform 1410；

Pretreated raw material is entered into the broken sorting bed of sieve, and sieve is fallen by the screenings after the screening of upper rotary screen 1406 On lower thing guide plate 1408, because the lower thing guide plate 1408 is to be obliquely installed, under gravity, the roughing cleaned coal of screenings falls into To in screenings outlet 1405, and discharge outside seal case I 1401, by the oversize after the screening of upper rotary screen 1406 because of upper rolling Positioned at the surface of bottom roll sieve 1407, the oversize is dropped into during bottom roll sieves 1407 through row for the oversize outlet of shaft screen 1406 Postsearch screening, drops into screenings and exports 1405, oversize by the screenings after postsearch screening by screenings guide plate 1408 Oversize outlet 1404 is dropped into, baffle plate 1409 prevents oversize from mixing with screenings, maintenance platform 1410 is convenient broken to the sieve Sorting bed is repaired through row, and because coal is softer than spoil, the broken sorting bed of the sieve uses soft or hard, granularity combined type grading principle, can be with Ensure to be free of spoil particle in roughing cleaned coal.Roughing cleaned coal（Screenings）Conveyer connection collects the broken sorting bed of next stage dry method sieve Roughing cleaned coal discharging opening, the spoil discharging opening of the broken sorting bed of first order sieve is connected to the charging aperture of the broken sorting bed of second level sieve, repeats The treatment assorting room of first order sorting bed, reaches and carefully selects selected purpose.The system sharpness of separation is high, and ratio defective product is high, region Adaptability is good, overcomes the shortcoming of conventional dry system.

Embodiment 3

Dedusting sorting bed 20 as described in Figure 3 at least includes a seal case II 2001 and is connected with seal case II 2001 Whirlwind collector 2002, the top of described seal case II 2001 is provided with semi-finished product feeding mouth 2003, described seal box The bottom of body II 2001 is provided with the particle coal export 2004 and fine ash outlet 2005 separated by baffle plate, described whirlwind collector 2002 bottom is provided with fine coal export 2010；

Rotary screen distributing device 2006 is provided with inside described seal case II 2001, the rotary screen distributing device 2006 is located at half The underface of finished product feeding mouth 2003, described seal case II 2001 and whirlwind collector 2002 are by being located at joint sealing body II 2001 turn on the duff collecting bin 2007 of the junction of whirlwind collector 2002, and the duff collecting bin 2007 is respectively equipped with up and down For the exhaust column duff in duff collecting bin 2007 being extracted into whirlwind collector 2002, the exhaust column and seal case II The 2001 air exhauster connections being externally provided with, are additionally provided with air blast comb 2008, the air blast comb in described seal case II 2001 2008 are located on the inwall of the relative seal case II 2001 of duff collecting bin 2007, described air blast comb 2008 and seal box The air blower connection that body II 2001 is externally provided with, it is vertical in described whirlwind collector 2002 to be provided with through its top and extend to rotation Exhaust duct 2009 outside wind collector 2002, described rotary screen distributing device 2006 passes through rack-mounted motor reducer Drive and rotate；

Control is respectively provided with described particle coal export 2004, fine ash outlet 2005 and fine coal export 2010 Beans outlet 2004, fine ash outlet 2005 and the fine folding of coal export 2010 and the sealing rigidity impeller 2011 closed, it is described Exhaust duct 2009 is provided with helical fin 2012.

By the rotary screen distributing device 2006 that the roughing cleaned coal after screening is entered into dedusting sorting bed 20, the roughing cleaned coal By after the screening of rotary screen distributing device 2006, air blast comb 2008 will blow fine particle after rotary screen distributing device 2006 is screened It is scattered in duff collecting bin 2007, duff collecting bin is distributed exhaust column about 2007, cleaned coal particle is evacuated into whirlwind cleaned coal collects Device, air blower is sent back to after filtering by air draft manage-style, is recycled.Ash rate coal weight in fine particle, falls into fine ash and goes out Discharged in mouth 2005, the particulate coal after screening is fallen under gravity into particle coal export 2004.The segment process is used Be weight, granularity combined type grading principle.Fine coal powder in the particle cleaned coal and whirlwind cleaned coal collector of oversize is collected in Together, formed and select head coal product again, overcome the offline problem of sorting, the sealing rigidity impeller 2011 being provided with can be to dropping into Particulate coal or ash in the outlet 2005, fine coal export 2010 of particle coal export 2004, fine ash is through capable discharge at times, air draft The helical fin 2012 that is provided with of pipe 2009 prevents duff to be extracted whirlwind collector 2002, and the deliming rate of the dedusting sorting bed reaches 5%。

Embodiment 4

Desulfurization sorting bed 22 as described in Figure 4 at least includes a vertical sealed casing 2201, the vertical sealed casing 2201 Top be provided with charging aperture 2202, inside vertical sealed casing 2201 from top to bottom successively intersect be provided with one-level selective crushing rolling Shaft screen 2203, Second Order Selectivity crushing roller sieve 2204, three-level selective crushing rotary screen 2205, the one-level selective crushing The feeding mouth of rotary screen 2203 is located at the underface of charging aperture 2202, the oversize of the one-level selective crushing rotary screen 2203 Discharging opening sieves 2204 feeding mouth, the discharging opening of the Second Order Selectivity crushing roller sieve 2204 with Second Order Selectivity crushing roller Oversize is connected with the feeding mouth of three-level selective crushing rotary screen 2205 by guide plate 2206, described three-level selective crushing The oversize discharging opening of rotary screen 2205 passes through guide plate with the oversize discharging opening 2207 that the bottom of vertical sealed casing 2201 is provided with 2206 connections；

Described one-level selective crushing rotary screen 2203, Second Order Selectivity crushing roller sieve 2204, three-level is selectively broken Electromagnetic cylinder 2208 is respectively equipped with immediately below the screenings discharging opening of broken rotary screen 2205, the front of electromagnetic cylinder 2208 Lower section is provided with thin material collection cylinder 2209, and the rear of the thin material collection cylinder 2209 is provided with ferrous contaminants surge drum 2210, described Thin material collection cylinder 2209 in thin material derived by being located at thin material outlet that the wall of vertical sealed casing 2201 is provided with, In described ferrous contaminants surge drum 2210 ferrous contaminants material is by being located in iron tramp surge drum 2210 and extends to vertical The output of output screw 2211 outside formula seal case 2201 is arrived outside vertical sealed casing 2201；

Described one-level selective crushing rotary screen 2203, Second Order Selectivity crushing roller sieve 2204, three-level is selectively broken Broken rotary screen 2205 and electromagnetic cylinder 2208 are driven by the motor reducer that vertical sealed casing 2201 is externally provided with and rotated；

Entered into desulfurization sorting bed 22 by the cleaned coal after the dedusting of dedusting sorting bed 20, rolled by one-level selective crushing Shaft screen is screened through row, and screenings dropped on electromagnetic cylinder 2208, to screening after the cleaned coal containing iron tramp carry out except iron is miscellaneous Matter, by after electromagnetic cylinder 2208, the cleaned coal of ferrous contaminants does not enter into thin material collection cylinder 2209 and derives, and iron tramp falls into Exported in ferrous contaminants surge drum 2210 and by output screw 2211, the oversize after one-level selective crushing trommelling Enter into next stage selective crushing rotary screen to continue to screen, and iron impurity simultaneously, the like to three-level selective crushing Oversize after rotary screen enters into the discharge of oversize discharging opening, by the strong magnetic treatment of three-level, forms final cleaning product of coal, should Segment process uses magnetic separation, size sorting principle, average desulfurization degree 15%.Output screw 2211 in the present embodiment is this skill Art field it is conventional for the output screw that is transported to block, herein not in detailed description.

Embodiment 5

On the basis of embodiment 4, the broken rolling of one-level selective crushing rotary screen 2203, Second Order Selectivity as shown in Figure 5 Shaft screen 2204, three-level selective crushing rotary screen 2205 are same selective crushing rotary screen, the selective crushing rotary screen At least include a drive shaft 2212 and cylindrical screen cage 2213；Described cylindrical screen cage 2213 is by two end face steel rings, uniform Be connected on two circumference of end face steel ring, and multiple micro- broken roller 2215 with the centerline parallel between two end face steel rings and The mesh screen 2214 being wrapped on micro- broken roller 2215 is constituted, and described drive shaft 2212 passes through the end face of cylindrical screen cage 2213 and passes through The connection muscle that the end face of cylindrical screen cage 2213 is provided with is fixedly connected, and in the axial direction of the drive shaft 2212 and cylindrical screen cage 2213 Heart line is located on the same line, and described mesh screen 2214 is fixed on micro- broken roller 2215, described drive shaft 2212 with it is vertical The rotary shaft connection of the motor reducer that seal case 2201 is externally provided with, drive shaft 2212 can drive 2213 turns of cylindrical screen cage Dynamic, micro- broken roller 2215 is strengthened cylindrical screen cage 2213, while preventing material when cylindrical screen cage 2213 is rotated to circle Cylindrical screen cage 2213 is caused to damage, and mesh screen 2214 can be screened to material through row.

Spray system 25.26 in above-described embodiment is the spray system commonly used in current Recognition Applied in Coal Preparation System, is this technology neck The spray system that domain personnel are known or in the market is directly commercially available, is no longer described in detail herein.

A kind of dry coal preparation method, comprises the following steps：

Step one, pretreatment of raw material：Raw coal in run coal bin 1 is transported to the overhead roller of the first order by raw coal conveyer 2 In sieve 3, fallen into the broken machine 5 in thick Hubei Province by the particle after the overhead rotary screen 3 of the first order is screened more than 30mm and crushed, the first order Overhead rotary screen 3 is less than 30mm particle after screening is dropped on the belt of the first branching conveyer 4, is broken by the broken machine 5 in thick Hubei Province Particle after broken is entered into the overhead rotary screen 7 in the second level by the first elevator 6, is screened by the overhead rotary screen 7 in the second level The particle more than 30mm falls into the broken machine 8 in thin Hubei Province and is crushed afterwards, and the overhead rotary screen 7 in the second level is less than the particle of 30mm after screening Drop on the belt of the second branching conveyer 9, the 3rd branching conveyer 10 is dropped into through particle of the broken machine 8 in meticulous Hubei Province after broken Belt on, the particle on the first branching conveyer 4, the second branching conveyer 9, the belt of the 3rd branching conveyer 10 drops into On four branching conveyers 11, and transport in raw material cabin 12；

Step 2, roughing cleaned coal：Particulate coal in raw material cabin 12 is transported to the first order and sieves broken point by the second elevator 13 To select carry out in bed 14 and sieve brokenly sorting, the screenings of the broken sorting bed 14 of first order sieve drops into the belt of roughing cleaned coal conveyer 18 On, the oversize of the broken sorting bed 14 of first order sieve drops into the 3rd elevator 15 and transports in the broken sorting bed 16 of the second sieve The broken sorting of row sieve, the screenings of the broken sorting bed 16 of second level sieve is dropped on the belt of roughing cleaned coal conveyer 18, and oversize falls Enter onto the belt of waste residue output conveyer 17, the roughing cleaned coal fallen on roughing cleaned coal conveyer 18 passes through the 4th elevator 19 It is sent in dedusting sorting bed 20, is carried out in the waste residue and the transport of middle coal on waste residue output conveyer 17 to the first spray system 25 Spray process；

Step 3, selected finished product cleaned coal, the roughing cleaned coal entered into dedusting sorting bed 20 carries out dedusting, by after dedusting Semi-finished product cleaned coal entered into by the 5th elevator 21 desulfurization screening carried out in desulfurization sorting bed 22, by dedusting sorting bed 20 The discarded object sub-elected with desulfurization sorting bed 22 is dropped into and exported on the belt of discarded object output machine 23, by desulfurization sorting bed 22 Finished product cleaned coal after desulfurization is transported in the second spray system 26 by cleaned coal conveyer 24 and carries out spray process, at spray Finished product cleaned coal after reason is required cleaned coal.

It is exemplified as above be only to of the invention for example, do not constitute the limitation to protection scope of the present invention, it is all It is that design same or analogous with the present invention is belonged within protection scope of the present invention.

Claims (7)

1. a kind of dry coal preparation method, it is characterised in that a kind of new dry coal preparation system of the method includes frame and original Coal bunker（1）, the overhead rotary screen of the first order is fixed with described frame（3）, the broken machine in thick Hubei Province（5）, the overhead rotary screen in the second level （7）, the broken machine in thin Hubei Province（8）, raw material cabin（12）, the broken sorting bed of first order sieve（14）, the second level broken sorting bed of sieve（16）, dedusting sorting Bed（20）, desulfurization sorting bed（22）, the first spray system（25）, the second spray system（26）；

Described run coal bin（1）The oscillating feeder that bottom is installed and the overhead rotary screen of the first order（3）Upper entrance by original Coal conveyer（2）Connection, the overhead rotary screen of the first order（3）The particle outlet less than 30mm be arranged right below first point Branch conveyer（4）, the broken machine in described thick Hubei Province（5）It is located at the overhead rotary screen of the first order（3）The particle outlet more than 30mm just Lower section, the broken machine in described thick Hubei Province（5）Outlet pass through the first elevator（6）With the overhead rotary screen in the second level（7）Connection, it is described The overhead rotary screen in the second level（7）The particle outlet less than 30mm be arranged right below the second branching conveyer（9）, described is thin Break machine in Hubei Province（8）It is located at the overhead rotary screen in the second level（7）The particle outlet more than 30mm underface, the broken machine in described thin Hubei Province （8）What is exported is arranged right below the 3rd branching conveyer（10）；

The first described branching conveyer（4）, the second branching conveyer（9）, the 3rd branching conveyer（10）Output end just Lower section is provided with the 4th branching conveyer（11）, described the 4th branching conveyer（11）Output end be located at raw material cabin（12）Just Top；

The raw material cabin（12）The second elevator below the outlet of the oscillating feeder of bottom（13）With the broken sorting of first order sieve Bed（14）Top entry couples, the broken sorting bed of first order sieve（14）Oversize outlet the 3rd lifting being arranged right below Machine（15）With the broken sorting bed of second level sieve（16）Entrance connection, the described broken sorting bed of second level sieve（16）Oversize outlet Be arranged right below waste residue output conveyer（17）With the first spray system（25）Connection, the described broken sorting bed of first order sieve （14）With the broken sorting bed of second level sieve（16）Screenings outlet be arranged right below roughing cleaned coal conveyer（18）；

The roughing cleaned coal conveyer（18）The 4th elevator being arranged right below of output end（19）With dedusting sorting bed（20） Connection, the dedusting sorting bed（20）The 5th elevator that is provided with of cleaned coal outlet lower section（21）With desulfurization sorting bed（22）Even Connect, described dedusting sorting bed（20）, desulfurization sorting bed（22）Waste outlet be arranged right below discarded object conveyer （23）, described desulfurization sorting bed（22）The cleaned coal cleaned coal conveyer that is arranged right below of outlet（24）Output end with second spray Pouring system（26）Connection；

Comprise the following steps：

Step one, pretreatment of raw material：Run coal bin（1）In raw coal pass through raw coal conveyer（2）It is transported to the overhead roller of the first order Sieve（3）In, by the overhead rotary screen of the first order（3）Particle after screening more than 30mm falls into the broken machine in thick Hubei Province（5）In crushed, The overhead rotary screen of the first order（3）Particle after screening less than 30mm drops into the first branching conveyer（4）Belt on, by thick Break machine in Hubei Province（5）Particle after broken passes through the first elevator（6）Enter into the overhead rotary screen in the second level（7）In, by the second level Overhead rotary screen（7）Particle after screening more than 30mm falls into the broken machine in thin Hubei Province（8）In crushed, the overhead rotary screen in the second level （7）Particle after screening less than 30mm drops into the second branching conveyer（9）Belt on, through meticulous Hubei Province break machine（8）After broken Particle drop into the 3rd branching conveyer（10）Belt on, the first branching conveyer（4）, the second branching conveyer（9）, Three branching conveyers（10）Particle on belt drops into the 4th branching conveyer（11）On, and transport to raw material cabin（12）In；

Step 2, roughing cleaned coal：Raw material cabin（12）In particulate coal pass through the second elevator（13）It is transported to broken point of first order sieve Select bed（14）In sieve brokenly sorting, the broken sorting bed of first order sieve（14）Screenings drop into roughing cleaned coal conveyer（18）'s On belt, the broken sorting bed of first order sieve（14）Oversize drop into the 3rd elevator（15）In and transport to the broken sorting of the second sieve Bed（16）In sieve brokenly sorting, the broken sorting bed of second level sieve（16）Screenings drop into roughing cleaned coal conveyer（18）Skin Take, oversize drops into waste residue output conveyer（17）Belt on, fall in roughing cleaned coal conveyer（18）On roughing essence Coal passes through the 4th elevator（19）It is sent to dedusting sorting bed（20）In, waste residue output conveyer（17）On waste residue and middle coal fortune It is defeated to the first spray system（25）In carry out spray process；

Step 3, selected finished product cleaned coal, enters into dedusting sorting bed（20）In roughing cleaned coal carry out dedusting, by after dedusting Semi-finished product cleaned coal passes through the 5th elevator（21）Enter into desulfurization sorting bed（22）In carry out desulfurization screening, by dedusting sorting bed （20）With desulfurization sorting bed（22）The discarded object for sub-electing drops into discarded object output machine（23）Belt on export, by desulfurization Sorting bed（22）Finished product cleaned coal after desulfurization passes through cleaned coal conveyer（24）It is transported to the second spray system（26）In sprayed Treatment, by the finished product cleaned coal after spray process be required cleaned coal.

2. a kind of dry coal preparation method according to claim 1, it is characterised in that the described broken sorting bed of first order sieve （14）With the broken sorting bed of first order sieve（16）It is the broken sorting bed of same sieve, the broken sorting bed of the sieve at least includes a seal case I （1401）, the seal case I（1401）Both sides be fixed with vertical frame column（1402）, described seal case I（1401）'s Top offers feeding mouth（1403）, seal case（1401）Bottom offer oversize outlet（1404）Exported with screenings （1405）, described seal case（1401）In be provided with rotary screen（1406）Sieved with bottom roll（1407）, and feeding mouth （1403）Positioned at upper rotary screen（1406）Surface, the upper rotary screen（1406）Sieved with bottom roll（1407）Center line position In in same vertical plane, and upper rotary screen（1406）The outlet of end oversize positioned at bottom roll sieve（1407）Middle part, Described bottom roll sieve（1407）The outlet of the oversize of end is exported positioned at oversize（1404）Surface, described upper rolling Shaft screen（1406）Sieved with bottom roll（1407）Screenings upper rotary screen is located at by inclination（1406）Sieved with bottom roll（1407） The screenings guide plate of lower section（1408）It imported into screenings outlet（1405）In, described screenings guide plate（1408）Upper end is fixed In seal case（1401）Inwall on, the screenings guide plate（1408）Lower end positioned at screenings export（1405）Just go up Side, described screenings guide plate（1408）Width be equal to or more than upper rotary screen（1406）Sieved with bottom roll（1407）Width Degree, and screenings guide plate（1408）One side and upper rotary screen（1406）Sieved with bottom roll（1407）End is located at same vertical On face, described upper rotary screen（1406）Sieved with bottom roll（1407）One end is arranged on for driving rotary screen（1406）With under Rotary screen（1407）The motor reducer of rotation, the motor reducer is fixedly mounted in frame.

3. a kind of dry coal preparation method according to claim 1, it is characterised in that described dedusting sorting bed（20）At least Including a seal case II（2001）And with seal case II（2001）The whirlwind collector of connection（2002）, described seal box Body II（2001）Top be provided with semi-finished product feeding mouth（2003）, described seal case II（2001）Bottom be provided with by gear The particle coal export that plate separates（2004）Exported with fine ash（2005）, described whirlwind collector（2002）Bottom be provided with finely Coal export（2010）；

Described seal case II（2001）Inside is provided with rotary screen distributing device（2006）, the rotary screen distributing device（2006）It is located at Semi-finished product feeding mouth（2003）Underface, described rotary screen distributing device（2006）The outlet of end is located at particle coal export （2004）Surface, described seal case II（2001）With whirlwind collector（2002）By being located at joint sealing body II（2001） With whirlwind collector（2002）The duff collecting bin of junction（2007）Conducting, the duff collecting bin（2007）Set respectively up and down Have for duff collecting bin（2007）In duff be extracted into whirlwind collector（2002）In exhaust column, the exhaust column with sealing Casing II（2001）The air exhauster connection being externally provided with, described seal case II（2001）Inside it is additionally provided with air blast comb（2008）, The air blast comb（2008）Positioned at duff collecting bin（2007）Relative seal case II（2001）Inwall on, described air blast Comb（2008）With seal case II（2001）The air blower connection being externally provided with, described whirlwind collector（2002）It is interior vertically to set Have through its top and extend to whirlwind collector（2002）Outer exhaust duct（2009）, described rotary screen distributing device（2006） Driven by rack-mounted motor reducer and rotated.

4. a kind of dry coal preparation method according to claim 1, it is characterised in that described desulfurization sorting bed（22）At least Including a vertical sealed casing（2201）, the vertical sealed casing（2201）Top be provided with charging aperture（2202）, vertical sealed Casing（2201）It is internal that intersection is provided with one-level selective crushing rotary screen successively from top to bottom（2203）, the broken rolling of Second Order Selectivity Shaft screen（2204）, three-level selective crushing rotary screen（2205）, the one-level selective crushing rotary screen（2203）Feeding mouth Positioned at charging aperture（2202）Underface, the one-level selective crushing rotary screen（2203）Oversize discharging opening and two grades choosing Selecting property crushing roller is sieved（2204）Feeding mouth, Second Order Selectivity crushing roller sieve（2204）Discharging opening oversize and three Level selective crushing rotary screen（2205）Feeding mouth pass through guide plate（2206）Connection, described three-level selective crushing rotary screen （2205）Oversize discharging opening and vertical sealed casing（2201）The oversize discharging opening that bottom is provided with（2207）By guide plate （2206）Connection；

Described one-level selective crushing rotary screen（2203）, Second Order Selectivity crushing roller sieve（2204）, three-level it is selectively broken Broken rotary screen（2205）Screenings discharging opening immediately below be respectively equipped with electromagnetic cylinder（2208）, the electromagnetic cylinder（2208）Just Thin material collection cylinder is provided with below front（2209）, the thin material collection cylinder（2209）Rear be provided with ferrous contaminants surge drum （2210）, described thin material collection cylinder（2209）In thin material by being located at vertical sealed casing（2201）What wall was provided with Thin material outlet is derived, described ferrous contaminants surge drum（2210）In ferrous contaminants material by being located at iron tramp surge drum （2210）In and extend to vertical sealed casing（2201）Outer output screw（2211）Export vertical sealed casing（2201） Outward；

Described one-level selective crushing rotary screen（2203）, Second Order Selectivity crushing roller sieve（2204）, three-level it is selectively broken Broken rotary screen（2205）And electromagnetic cylinder（2208）By vertical sealed casing（2201）The motor reducer being externally provided with drives and turns It is dynamic.

5. a kind of dry coal preparation method according to claim 2, it is characterised in that described bottom roll sieve（1407）Lower section The screenings guide plate being provided with（1408）Bottom and screenings export（1405）Between pass through baffle plate（1409）Connection, described is vertical Upright of frame（1402）It is provided with maintenance platform（1410）.

6. a kind of dry coal preparation method according to claim 3, it is characterised in that described particle coal export（2004）、 Fine ash is exported（2005）With fine coal export（2010）On be respectively provided with control particle coal export（2004）, fine ash outlet （2005）With fine coal export（2010）Folding and the sealing rigidity impeller closed（2011）, described exhaust duct（2009）Set There is helical fin（2012）.

7. a kind of dry coal preparation method according to claim 4, it is characterised in that described one-level selective crushing roller Sieve（2203）, Second Order Selectivity crushing roller sieve（2204）, three-level selective crushing rotary screen（2205）It is same selectivity Crushing roller is sieved, and the selective crushing rotary screen at least includes a drive shaft（2212）With cylindrical screen cage（2213）；Described Cylindrical screen cage（2213）By two end face steel rings, be uniformly connected on two circumference of end face steel ring, and with two end face steel Multiple micro- broken roller of the centerline parallel between circle（2215）Be wrapped in micro- broken roller（2215）On mesh screen（2214）Composition, institute The drive shaft stated（2212）Through cylindrical screen cage（2213）End face simultaneously passes through cylindrical screen cage（2213）The connection that end face is provided with Muscle is fixedly connected, and the drive shaft（2212）With cylindrical screen cage（2213）Longitudinal center line be located on the same line, institute The mesh screen stated（2214）It is fixed on micro- broken roller（2215）On, described drive shaft（2212）With vertical sealed casing（2201）Peripheral hardware The rotary shaft connection of some motor reducers.