CN214792454U - Full-grain cascade combined sorting system - Google Patents

Abstract

The utility model provides a full grain cascade combined sorting system, which comprises a raw coal preparation unit, a rapid dehydration unit, a dry method dense medium fluidized bed sorting unit and an assembled modular sorting unit; the raw coal preparation unit is used for scattering and primarily treating raw coal from a mine or a bunker, and then conveying the raw coal to the rapid dehydration unit; the rapid dehydration unit adopts hot air generated by a circulating air supply system to dehydrate and dry raw coal; the dry dense medium fluidized bed separation unit is used for carrying out dry dense medium fluidization vibration separation on the loose coal material dehydrated and dried by the rapid dehydration unit; the assembled modular sorting unit is used for concentrating the slack coal sorted by the dry dense medium fluidized bed sorting unit. The system of the utility model promotes the processing capacity of coal separation and reduces the energy consumed in the separation process.

Description

Full-grain cascade combined sorting system

Technical Field

The utility model relates to a coal dry process is selected separately the field, specifically relates to a whole grain cascade closes sorting system, especially relates to a dry process based on inferior quality coal jointly selects separately the system.

Background

Coal is a solid combustible mineral formed gradually by ancient plants buried underground and undergoing complex biochemical and physicochemical changes. Coal is known as black gold by people and is industrial food, which is one of main energy sources used in the human world since the eighteenth century, and since the twenty-first century, although the value of coal is not as high as before, coal is one of indispensable energy sources for production and life of human beings at present and in a long time in the future after all, the supply of coal is also related to the stability of the development of the industry of China and the aspect of the whole society, and the problem of the supply safety of coal is also the most important part in the energy safety of China.

Coal separation mainly comprises two directions of water washing and dry separation, the water washing basically adopts the processes of jigging, dense medium, flotation and the like, and the method has the advantages of mature process, high separation precision and high processing capacity. The disadvantages of large construction investment, long period, high production cost, large water resource consumption and waste, and the water consumption of washing 1 ton of raw coal is about 0.1m³In addition, low quality by-products such as coal slurry are also produced. The dry separation is a coal separation method which exists and develops slowly in the last two decades, has the advantages of no water, simple process, less investment and low production cost, and the main representative process is a wind power dry coal separation process. From the coal distribution region, the west accounts for 80.4% of the country, the middle accounts for 15.2% of the country, and the east accounts for 4.4% of the country. The west is the main coal distribution area in China and is just the dry and little water area, therefore, compared with water washing, the dry separation hasWider demand and prospect, and is greatly popularized in China and all over the world in a very short period. The water content, ash content and sulfur content of coal are important factors influencing the quality of coal. To improve the quality of coal, the coal must be dewatered and sorted. With the development of coal upgrading technology, coal drying and dry separation processes are widely applied in the coal upgrading technology, and remarkable success is achieved.

At present, domestic dry coal separation equipment has single function and limited effective separation granularity, and only has certain separation effect on the rough separation of full-size-fraction raw coal or on a certain specific-size-fraction raw coal. In addition, the traditional wind-force dry coal separation method (such as wind jigging, wind shaking tables and the like) takes air as a separation medium, the difference between the separation density and the medium density is over 1000 times, the separation efficiency is low, and the applicability is poor; the lower sorting limit of equipment such as X-ray equipment, image identification equipment and the like which are developed recently and rely on photoelectric technology to identify different components in coal is high, and the equipment is mainly suitable for discharging gangue from large coal blocks; the sorting equipment for the vibration external force and the authigenic medium is mainly used for discharging gangue from medium and fine-grained coal, and the sorting precision is relatively low; the magnetite powder and the coal powder are used as mixed binary heavy medium coal separation equipment, the separation density can be flexibly adjusted, the separation precision is high, and the fine coal is difficult to effectively separate; the coal dressing equipment depending on external force fields such as a magnetic field, an electric field, a vibration field and the like can realize effective dressing of fine coal, but the treatment capacity is low and the added value of products is small. In addition, due to the self limitation of each dry coal separation device, under the separation process designed based on the device, the problems of few separated products, poor quality of clean coal, low utilization rate of media, zero emission of dust, large influence of moisture on feeding and the like exist, so that the dry separation and quality improvement degree and high-efficiency utilization of coal resources are limited.

Chinese patent application No. CN201811086591.3 discloses a coal dry separation system, which comprises a raw coal preparation and drying part, a separation part, and a medium purification cycle part; the medium purification circulating part adopted by the separation part comprises a medium removing sieve I, a medium removing sieve II, a flow divider I, a flow divider II, a circulating medium bin, a medium feeder I, a flow dividing medium buffer bin, a medium feeder II, a medium magnetic separator, a magnetic concentrate flow divider, a magnetic concentrate bin, a medium feeder III, a circulating medium buffer bin, a medium feeder IV, a magnetic concentrate buffer bin, a magnetic concentrate feeder, a medium removing sieve III, a medium removing sieve IV and the like, and adopts a dry-method dense medium fluidized bed separator and a pulse/vibration dense medium fluidized bed separator which are connected with a dust discharge port. The method has the problems of not fine coverage of the sorting grade, numerous components, non-uniform coordination, high failure rate and the like.

Therefore, in order to adapt to the sorting of various coal types, deep dry sorting research on the sorting of the coal must be enhanced, the size fraction sorting process is perfected, and the functional combination of equipment is optimized so as to realize the efficient dry sorting and clean utilization of the coal.

SUMMERY OF THE UTILITY MODEL

Based on the problem that exists among the prior art, the utility model provides a whole grain cascade closes sorting system, its technical problem that has not only solved prior art existence has still promoted the handling capacity that coal was selected separately, has still reduced the energy that consumes among the sorting process.

According to the technical scheme of the utility model, a full grain cascade combined sorting system is provided, which comprises a raw coal preparation unit, a rapid dehydration unit, a dry method dense medium fluidized bed sorting unit and an assembled modular sorting unit; the raw coal preparation unit is used for scattering and primarily treating raw coal from a mine or a bunker, and then conveying the raw coal to the rapid dehydration unit; the rapid dehydration unit adopts hot air generated by a circulating air supply system to dehydrate and dry raw coal; the dry dense medium fluidized bed separation unit is used for carrying out dry dense medium fluidization vibration separation on the loose coal material dehydrated and dried by the rapid dehydration unit; the assembled modular sorting unit is used for concentrating the slack coal sorted by the dry dense medium fluidized bed sorting unit.

Wherein the full size fraction comprises 0mm-80mm raw coal, the 0mm-80mm raw coal is subjected to primary treatment, and the primary treatment is to perform coarse screening treatment on the large-particle-size lump coal. The dry method dense medium fluidized bed separation unit is used for separating raw coal with the particle size of 30-80 mm, and the assembled modular separation unit is mainly used for separating the raw coal with the particle size of 0-30 mm.

Further, the full-grain cascade combined sorting system comprises a raw coal belt conveyor of 0mm-80mm, a raw coal grading sieve and a raw coal sieve distribution bag dust remover. The raw coal belt conveyor is used for conveying raw coal accumulated at a coal receiving position to a raw coal classifying screen, the raw coal classifying screen is arranged in a raw coal screening workshop, and the raw coal classifying screen is used for screening the raw coal and dividing the raw coal into two parts of raw coal which are more than 30mm and less than 30 mm; a fully-sealed raw coal screen distribution bag dust remover is arranged on a raw coal screening workshop and is used for removing dust in the raw coal screening workshop.

Furthermore, the full grain cascade combined sorting system comprises a first main coal feeding belt conveyor, a second dry coal feeding belt conveyor, a main coal blending scraper conveyor, a reciprocating drying device and a dry shallow slot heavy medium coal feeding belt conveyor, wherein the first main coal feeding belt conveyor and the second dry coal feeding belt conveyor are arranged at the rear end of the raw coal grading screen, the first main coal feeding belt conveyor is used for conveying raw coal to the main coal blending scraper conveyor from the raw coal grading screen, and the second dry coal feeding belt conveyor is used for conveying lump coal obtained by screening the raw coal grading screen to the reciprocating drying device or the dry slot heavy medium coal feeding belt.

Preferably, the materials conveyed by the second drying coaling belt conveyor are dedusted by a raw coal screen distribution bag deduster. The main coal blending scraper is used for distributing raw coal to the dry heavy medium fluidized bed sorting unit. And (3) transporting and transferring the clean coal of 13mm-30mm to a clean powder coal transferring belt conveyor by a main coal selecting belt conveyor of 13mm-30 mm.

The utility model discloses a whole grain cascade closes sorting system, simplify process flow, environmental pollution is few, improve the transport capacity, improve classification efficiency, reduce the energy consumption, this cloth wind is less, improve the productivity, dust removal effect is good, hierarchical granularity is controllable, improve the drying, sorting effect is good, satisfy no hierarchical pan feeding granularity, high-efficient material classification, guarantee sorting efficiency, reduce cost, improve cooling efficiency, remove coal from and select separately, improve positive effect, low cost, play kind of sorter advantage, improve sorting efficiency, sorting efficiency is high, improve the classification, even cloth, solve the jam problem, practice thrift the power of transportation, avoid atmospheric pollution. The intelligent field adjustment is further realized, and the coal sorting effect is improved.

Drawings

FIG. 1 is a schematic structural view of a whole grain cascade combined sorting system according to the present invention;

FIG. 2 is a schematic structural view of a scraper conveyor used in the full grain cascade combined sorting system;

FIG. 3 is a schematic structural view of a belt conveyor used in the whole grain cascade sorting system;

FIG. 4 is a schematic diagram of a modular assembly sorting unit for use in a full grain cascade sortation system.

The names of the components indicated by reference numerals in the drawings are as follows: 0mm-80mm raw coal belt conveyor 1, raw coal grading screen 2, raw coal screen distribution bag dust remover 3, first main selection coal belt conveyor 4, second drying coal belt conveyor 5, main selection coal blending scraper 6, medium coal bucket elevator 7, main selection medium coal belt conveyor 8, main selection mineral high-efficiency separator 9, main selection clean coal belt conveyor 10, No. 1 main selection clean coal transfer belt conveyor 11, No. 2 main selection clean coal transfer belt conveyor 12, clean coal grading screen 13, re-selection coal belt conveyor 14, re-selection mineral high-efficiency separator 15, re-selection clean coal belt conveyor 16, clean coal screen distribution bag dust remover 17, 13mm-30mm main selection lump coal belt conveyor 18, clean end coal transfer belt conveyor 19, dry selection gangue 20, dry selection gangue transfer belt conveyor 21, dry selection dust remover 22, reciprocating drying equipment 23, dry method heavy medium coal belt conveyor 24, shallow groove heavy medium 25, The dry-method shallow-groove heavy-medium lump coal conveyor 26, the dry dust remover coal conveyor 27, the shallow-groove heavy-medium dust remover coal conveyor 28, the dry-method shallow-groove heavy-medium gangue conveyor 29, a head wheel 31, a driving motor 32, a blocking detector 33, a first discharge port 34, a scraper chain 35, a second discharge port 36, a broken chain indicator 37, a box body 38, a tail wheel 39, a discharge hopper 41, a head shield 42, a driving roller 43, a sweeper 44, a blocking belt 45, a convex arc section rack 46, a pressing belt wheel 47, a blocking roller 48, a middle rack 49, a middle rack supporting leg 50, an upper supporting roller 51, a concave arc section rack 52, a turnabout roller 53, a lower supporting roller 54, a guide groove 55, a hollow section sweeper 56, a tail roller 57, a tensioning device 58 and a tail rack 59.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.

The utility model provides a whole grain cascade closes sorting system, the term definition: "full size fraction" refers to the realization of combined separation under the condition of using the same main bed for separation, and then reaches to realize the low-quality coal dry separation of 0mm-80mm, the utility model discloses the energy that the raw coal of unit weight consumed reduces 30%.

The utility model discloses a full grain cascade closes sorting system includes raw coal preparation unit, rapid dehydration unit, dry process dense medium fluidized bed sorting unit and assembled modularization sorting unit; the raw coal preparation unit is used for scattering and primarily treating raw coal from a mine or a bunker, and then conveying the raw coal to the rapid dehydration unit; the rapid dehydration unit adopts hot air generated by a circulating air supply system to dehydrate and dry raw coal; the dry dense medium fluidized bed separation unit is used for carrying out dry dense medium fluidization vibration separation on the loose coal material dehydrated and dried by the rapid dehydration unit; the assembled modular sorting unit is used for concentrating the slack coal sorted by the dry dense medium fluidized bed sorting unit.

The dry dense medium fluidized bed separation unit is mainly used for separating raw coal with the particle size of 30-80 mm, and the assembled modular separation unit is mainly used for separating raw coal with the particle size of 0-30 mm.

The utility model discloses in the whole grade of grain jointly select separately system, 0mm-80mm raw coal is the raw coal through preliminary treatment, and preliminary treatment is exactly to carry out coarse screening with big particle size lump coal and handles, specifically is just to sieve away the lump coal that the particle size is greater than 80 mm. The utility model discloses for the rough separation among the prior art, adopt the subdivision of grading to select separately, the selection that each separation module of also being make full use of's separation advantage comes the maximize to realize the raw coal is selected and preferred, consequently the utility model discloses the material particle diameter that relates has clear and definite definition or division. In the present invention, the material grain diameter designated by the term is as follows: "Block" refers to a 30mm-80mm size fraction, "end" refers to a 0mm-30mm size fraction, "coarse" refers to a 13mm-30mm size fraction, and "fine" refers to a 0mm-13mm size fraction.

The utility model discloses be applied to full grain level and jointly select separately technology, a full grain level closes selects separately method promptly, and it includes following step:

a raw coal grading step S1, wherein the raw coal after rough separation is conveyed to a screening workshop by a raw coal belt conveyor of 0mm-80mm, and a raw coal grading sieve of 30mm is fed into a chute above a raw coal grading sieve screen machine; the raw coal belt conveyor of 0mm-80mm is preferably a raw coal belt conveyor of 0mm-80 mm.

A lump coal transferring and drying step S2, conveying 30-80 mm raw coal screened by a raw coal grading sieve to a raw coal drying system through a second drying and coaling belt conveyor 5, and feeding the raw coal into a reciprocating dryer for drying through a feeding port above the raw coal drying system; the second drying and coal feeding belt conveyor 5 adopts a raw coal belt conveyor I with the thickness of 30mm-80mm, and a raw coal drying system can adopt a reciprocating dryer;

a step S3 of transferring and sorting lump coal, wherein dried 30mm-80mm raw coal is discharged to a 30mm-80mm raw coal belt conveyor II from a discharge end of a reciprocating dryer and conveyed to a dry heavy medium fluidized bed sorting unit, the dried 30mm-80mm raw coal firstly enters a buffer bin and then is fed into the dry heavy medium fluidized bed sorting unit by a feeder for sorting;

a step S4 of transferring heavy medium sorted products, wherein the cleaned coal products are conveyed to a cleaned coal bin by a cleaned coal product belt conveyor with the diameter of 30-80 mm after being subjected to medium removal treatment, and the gangue products are transferred to a sorted gangue belt conveyor with the diameter of 0-80 mm by a gangue belt conveyor with the diameter of 30-80 mm after being subjected to medium removal treatment;

a step S5 of transferring and sorting the slack coal, wherein 0mm-30mm raw coal enters a 0mm-30mm raw coal belt conveyor from a 30mm classifying screen undersize chute, is conveyed to a coal blending scraper machine of a slack coal sorting system, and is uniformly conveyed into three sets of slack coal sorting systems which are arranged in parallel by the coal blending scraper machine to carry out main sorting; the preferred modularization assembled sorting system of slack coal sorting system, further in the utility model discloses modularization assembled sorting system adopts modularization assembled 400 slack coal sorting system, the preferred handling capacity of slack coal sorting system is 400 tons/hour slack coal sorting system;

in the step S6, transferring the waste rock, wherein the waste rock products with the size of 0mm-30mm enter a sorting waste rock belt conveyor with the size of 0mm-80mm and are conveyed to a waste rock bin;

a step S7 of selecting the slack coal, in which the main selected middlings are discharged to a middlings selecting belt conveyor and conveyed to a modular assembly type 400 selecting middlings bucket elevator, and then conveyed to a scraper conveyor by the selecting middlings bucket elevator and returned to the modular assembly type separator for separation; the medium-coal separating bucket elevator is a medium-coal separating bucket elevator, preferably a modular assembly type 400 medium-coal separating bucket elevator, namely a modular assembly type medium-coal separating bucket elevator with the handling capacity of 400 tons/hour.

A step S8 of transferring and screening the fine cleaned coal, wherein the cleaned coal products after main selection are transferred to a fine coal grading screen of 0mm-30mm for grading through a separation cleaned coal belt conveyor II and a separation cleaned coal belt conveyor III; the separation clean coal belt conveyor II and the separation clean coal belt conveyor III both adopt modular assembly type separation clean coal belt conveyors with the handling capacity of 400 tons/hour;

a coarse clean coal transferring step S9, feeding coarse clean coal 13mm-30mm on a screen into a clean coal belt conveyor 13mm-30mm, and conveying to a clean coal product belt conveyor 0mm-30 mm;

a fine clean coal recleaning step S10, conveying 0mm-13mm fine clean coal under a 0mm-30mm slack coal grading sieve to a sorting host machine for sorting through a 0mm-13mm slack coal belt conveyor; the sorting host adopts a modular assembly type sorting host with the handling capacity of 300 tons/hour;

transferring the fine clean coal to a step S11, transferring the sorted 0mm-13mm fine clean coal product to a 0mm-30mm clean coal product belt conveyor by a sorting clean coal belt conveyor, and conveying the cleaned coal product to a clean coal bunker; wherein the sorting clean coal belt conveyor adopts a modular assembly type sorting clean coal belt conveyor with the handling capacity of 300 tons/hour;

and (S12) transferring fine waste rock, wherein the fine waste rock products of 0mm-13mm enter a sorting waste rock belt conveyor of 0mm-80mm, and are conveyed to a waste rock bin.

The invention will be further explained with reference to fig. 1, in which fig. 1 is a schematic structural diagram of a whole grain cascade sorting system according to the invention. As shown in figure 1, the full-grain cascade combined sorting system comprises a modularized combination consisting of a raw coal preparation unit, a rapid dehydration unit, a dry heavy medium fluidized bed sorting unit and an assembled modularized sorting unit, and further comprises a sorting system consisting of a raw coal belt conveyor 1 of 0-80 mm, a raw coal grading sieve 2, a raw coal sieve distribution bag dust collector 3, a first main separation coal belt conveyor 4, a second dry coal belt conveyor 5, a main separation coal scraper 6, a middling bucket elevator 7, a main separation middling belt conveyor 8, a main separation mineral efficient separator 9, a main separation clean coal belt conveyor 10, a No. 1 main separation clean coal transfer belt conveyor 11, a No. 2 main separation clean coal transfer belt conveyor 12, a clean coal grading sieve 13, a recleaning coal belt conveyor 14, a recleaning mineral efficient separator 15, a recleaning clean coal 16, a dry coal belt conveyor 2, a dry heavy medium fluidized bed sorting unit and an assembled modularized combination of the assembled modularized combination, A clean coal screen distribution bag dust collector 17, a 13mm-30mm main lump coal belt conveyor 18, a clean end coal transfer belt conveyor 19, a dry gangue selection belt conveyor 20, a dry gangue selection transfer belt conveyor 21, a dry dust collector coal powder belt conveyor 22, a reciprocating type drying device 23, a dry shallow groove heavy medium coal feeding belt conveyor 24, a dry shallow groove heavy medium separator 25, a dry shallow groove heavy medium lump coal belt conveyor 26, a dry dust collector coal powder belt conveyor 27, a shallow groove heavy medium dust collector coal powder belt conveyor 28 and a dry shallow groove heavy medium gangue belt conveyor 29; wherein, the raw coal belt conveyor 1 with the diameter of 0mm-80mm is used for conveying the raw coal accumulated at the coal receiving position to the raw coal classifying screen 2, the raw coal classifying screen 2 is arranged in a raw coal screening workshop, and the raw coal classifying screen 2 is used for screening the raw coal and dividing the raw coal into two parts of raw coal with the diameter of more than 30mm and less than 30 mm; a fully-sealed raw coal screen distribution bag dust remover 3 is arranged on the raw coal screening workshop and is used for removing dust in the raw coal screening workshop.

Further, a first main-selection coaling belt conveyor 4 and a second drying coaling belt conveyor 5 are arranged at the rear end of the raw coal classifying screen 2, the first main-selection coaling belt conveyor 4 is used for conveying raw coal from the raw coal classifying screen 2 to a main-selection coal blending scraper conveyor 6, and the second drying coaling belt conveyor 5 is used for conveying lump coal obtained by screening through the raw coal classifying screen 2 to a reciprocating drying device 23 or a dry-method shallow-groove heavy-medium coaling belt 24; preferably, the materials conveyed by the second drying coaling belt conveyor 5 are dedusted by the raw coal screen distribution bag deduster 3.

The main selected coal scraper 6 is used for distributing the raw coal to the dry heavy medium fluidized bed separation unit; the middling bucket elevator 7 is used for lifting middling to the main selection coal blending scraper 6 through a middling belt, the main selection middling belt conveyor 8 is used for conveying sorted middling to the middling bucket elevator 7, the main selection mineral efficient separator 9 is used for raw coal sorting, the main selection clean coal belt conveyor 10 is used for conveying sorted clean coal to the No. 1 main selection clean coal transshipment belt conveyor 11, and the No. 1 main selection clean coal transshipment belt conveyor 11 is used for conveying clean coal to the No. 2 main selection clean coal transshipment belt conveyor 12 through the main selection clean coal belt conveyor 10. Furthermore, the No. 2 main selection clean coal transfer belt conveyor 12 is used for conveying clean coal to the clean coal grading screen 13 through the No. 1 main selection clean coal transfer belt conveyor 11, the clean coal grading screen 13 is used for screening the clean coal, and the clean coal grading screen 13 divides the clean coal into two parts of clean coal of 13mm-30mm and less than 13 mm. Aiming at clean coal with the particle size of less than 13mm, a recleaning coaling belt conveyor 14 conveys the clean coal with the particle size of 0-13mm to a recleaning mineral efficient separator 15, the recleaning mineral efficient separator 15 is arranged in a clean coal screening workshop, the recleaning mineral efficient separator 15 is used for recleaning the clean coal with the particle size of 0-13mm, and a recleaning clean coal belt conveyor 16 is used for conveying the recleaning clean coal to a clean fine coal transfer belt conveyor 19 from the recleaning mineral efficient separator 15; and arranging a clean coal screen distribution bag dust remover 17 for dust removal of a clean coal screening workshop.

And (3) for clean coal with the particle size of 13-30 mm, using a 13-30 mm main selected lump coal belt conveyor 18 to transport the 13-30 mm clean coal to a clean end coal transshipment belt conveyor 19, wherein the clean end coal transshipment belt conveyor 19 is used for transporting the end clean coal from a dry separation dust collector pulverized coal belt conveyor 22, a re-selection clean coal belt conveyor 16 and the 13-30 mm main selected lump coal belt conveyor 18.

The dry gangue belt conveyor 20 is used for conveying gangue separated after main separation and recleaning, and the dry gangue reloading belt conveyor 21 is used for conveying gangue reloaded by the dry gangue belt conveyor 20. The dry separation dust remover coal powder belt conveyor 22 is used for conveying coal powder generated by a reciprocating type drying device, a dry method shallow slot heavy medium separator, a main mineral separation high-efficiency separator and a secondary mineral separation high-efficiency separator.

Additionally, a reciprocating drying device 23 is arranged for drying lump coal, a dry-method shallow-groove heavy-medium coal feeding belt conveyor 24 is used for conveying the lump coal from the reciprocating drying device 23 or the dry coal feeding belt conveyor to a dry-method shallow-groove heavy-medium separator, and a dry-method shallow-groove heavy-medium separator 25 is used for separating the lump coal.

The dry-method shallow-groove heavy-medium lump coal belt conveyor 26 is used for conveying lump clean coal from the dry-method shallow-groove heavy-medium separator 25, and the drying dust collector coal powder belt conveyor 27 is used for conveying coal powder generated by a dust collector of the reciprocating drying equipment 23 to the shallow-groove heavy-medium dust collector coal powder belt. The shallow slot heavy medium separator coal dust belt conveyor 28 is used for conveying the coal dust generated by the shallow slot heavy medium separator and the compound drying equipment dust remover to the dry separation dust remover coal dust belt, and the dry slot heavy medium gangue belt conveyor 29 is used for conveying the lump gangue separated by the dry slot heavy medium separator to the dry separation gangue belt.

Further, pool the utility model discloses redundant design between each component part of full size fraction combined separation system and the work coordination between sorting, screening and transporting between each component part, right the utility model discloses the concrete parameter of each part of full size fraction combined separation system is as follows: wherein the specific meanings of the individual parameters are: b represents bandwidth, L represents length, alpha represents horizontal angle, N represents power, and Q represents operation quantity.

0mm-80mm raw coal belt conveyor 1: b is 1000, L is 22.27m, α is 15 °, N is 30kW, and Q is 400 t/h; raw coal classifying screen 2: SZD2148 circular vibrating screen with 30mm mesh, N18.5 kW;

raw coal sieve distribution bag dust collector 3: LHF72, N is 50 kW;

the first main coal feeding belt conveyor 4: b is 1000, L is 38.49m, α is 15 °, N is 37kW, and Q is 400 t/h; and (5) a second drying coaling belt conveyor: 800 parts of B, 54.5 parts of L, 12 parts of alpha, 22 parts of N, and 120t/h of Q; a coal preparation scraper 6: b is 1000, L is 27m, α is 0 °, N is 45kW, and Q is 400 t/h;

the medium coal bucket elevator 7: n is 37kW, and Q is 60 t/h;

and (3) main selection of a middling belt conveyor 8: 650 parts of B, 25 parts of L, 12 parts of alpha, 5.5 parts of N, and 60t/h of Q;

efficient separator for main mineral separation 9: the assembly modularization treatment capacity is 400 tons/hour, ZM400, N is 1200 kW; main selection clean coal belt conveyor 10: 800, 30m, 12 ° α, 22kW, 300t/h1 # main separation clean coal transferring belt conveyor 11: 800 parts of B, 36.22 parts of L, 15 parts of alpha, 30kW parts of N, and 300t/h parts of Q; no. 2 main separation clean coal transshipment belt conveyor 12: 800 parts of B, 6 parts of L, 6 parts of alpha, 7.5 parts of N, and 300t/h of Q; clean coal classifying screen 13: an SZD2460 round vibrating screen with 13mm mesh, and N being 30 kW;

and (3) selecting a coaling belt conveyor 14: 800 parts of B, 34 parts of L, 15 parts of alpha, 22 parts of N, and 300t/h of Q;

and (3) a mineral re-separation efficient separator 15: the assembly modularization treatment capacity is 300 tons/hour, ZM300, and N is 820 kW; a cleaned coal recleaning belt conveyor 16: 800 parts of B, 20 parts of L, 15 parts of alpha, 11 parts of N, and 240t/h parts of Q;

a clean coal screen distribution bag dust collector 17: LHF72, N is 50 kW;

13mm-30mm main lump coal sorting belt conveyor 18: 800 parts of B, 11 parts of L, 15 parts of alpha, 5.5 parts of N, and 80t/h parts of Q; clean fine coal transfer belt conveyor 19: 800 parts of B, 68m of L, 15 degrees of alpha, 30kW of N and 300t/h of Q;

dry separation gangue belt conveyor 20: 800 parts of B, 76.32 parts of L, 15 parts of alpha, 22kW parts of N, and 100t/h parts of Q;

dry separation gangue transshipment belt conveyor 21: 800 parts of B, 29.2 parts of L, 0 parts of alpha, 11 parts of N, and 100t/h parts of Q; dry separation dust remover coal powder belt conveyor 22: 650 parts of B, 66m of L, 12 degrees of alpha, 15kW of N and 40t/h of Q; the reciprocating drying device 23: q is 100 t/h;

dry method shallow slot heavy medium coal feeding belt conveyor 24: 800 parts of B, 38.44m of L, 15 degrees of alpha, 15kW of N and 100t/h of Q; dry shallow slot heavy medium separator 25: q is 100 t/h;

dry shallow slot heavy medium lump coal belt conveyor 26: 650 parts of B, 107.67m of L, 15 degrees of alpha, 37kW of N and 80t/h of Q; drying dust remover coal powder belt conveyor 27: 650 parts of B, 14 parts of L, 6 parts of alpha, 5.5 parts of N, and 20t/h parts of Q; shallow slot heavy medium dust remover coal powder belt conveyor 28: 650 parts of B, 27.5m of L, 6 degrees of alpha, 5.5kW of N and 20t/h of Q; dry method shallow slot heavy medium gangue belt conveyor 29: 650, 47.5m, 12, 15kW, 60 t/h.

The full-grain cascade combined sorting system designed by the specific parameters fully realizes full-grain sorting, enables all components to run cooperatively, and realizes economic and power optimization.

In the lump coal transfer step, the heavy medium separation product transfer step and the gangue transfer step, the scraper conveyor shown in fig. 2 is used for conveying lump materials, and the scraper conveyor is preferably a coal blending scraper conveyor. The scraper conveyor shown in fig. 2 has an open chute and serves as a receiving element for coal, gangue or material, etc., and the scraper is fixed to the chain (constituting the scraper chain) as a pulling element. When the driving head transmission part of the scraper conveyor is started, the chain wheel on the head shaft of the winding machine is driven to rotate, so that the scraper chain circularly runs to drive the material to move along the chute until the head part of the conveyor is unloaded. The scraper chain bypasses the chain wheel to perform stepless closed circulation operation to finish the conveying of the materials.

The scraper conveyor shown in fig. 2 comprises a head wheel 31, a driving motor 32, a blockage detector 33, a first feed opening 34, a scraper chain 35, a second feed opening 36, a chain breakage indicator 37, a box body 38 and a tail wheel 39, wherein the head wheel 31 is used for driving the scraper chain 35, so that the scraper chain 35 moves in a conveying trough of the scraper conveyor main body, and the material is driven to move forwards. The driving motor 32 is used for driving the reducer to drive the head wheel 31 to rotate. A material blocking detector 33 is arranged in a conveying trough of the main body of the scraper conveyor and used for monitoring whether materials in the conveying trough of the main body of the scraper conveyor are blocked or not. Double feed openings, namely a first feed opening 34 and a second feed opening 36, are provided, which can be used for material unloading; the design of two feed openings is favorable to the quick uninstallation of material, has promoted the material transport volume in the unit interval. The scraper chain 35 is used for connecting a scraper which is perpendicular to a conveying trough of the scraper conveyor main body, and the scraper pushes the animal material to move forwards under the driving of the scraper chain 35. Meanwhile, a chain breakage indicator 37 is arranged in a conveying and feeding groove of the scraper conveyor main body and used for monitoring whether the scraper chain is broken or not. The scraper conveyor body conveys the chute, i.e. the box 38, for carrying the scrapers, scraper chains and material. Further, a tail pulley 39 is provided at the end of the conveying chute of the body of the scraper conveyor, the scraper chain is wound around the tail pulley 39, and the tail pulley 39 is used for changing the direction of the scraper chain.

In the clean coal transfer step, the belt conveyor shown in fig. 3 is used to transport the powdery material and the clean coal material. A belt conveyor as shown in fig. 3 is a friction-driven machine for continuously transporting materials, and mainly comprises a frame, a conveyor belt, carrier rollers, a tensioning device and the like. The material conveying device can form a material conveying flow path from an initial feeding point to a final discharging point on a certain conveying line. The conveying device can be used for conveying both broken materials and finished articles.

The belt conveyor shown in fig. 3 comprises a discharge hopper 41, a head shield 42, a transmission roller 43, a sweeper 44, a side blocking belt 45, a convex arc section frame 46, a pinch roller 47, a baffle roller 48, an intermediate frame 49, an intermediate frame support leg 50, an upper support roller 51, a concave arc section frame 52, a direction-changing roller 53, a lower support roller 54, a guide chute 55, an empty section sweeper 56, a tail roller 57, a tensioning device 58 and a tail frame 59, wherein the discharge hopper 41 is arranged at one end of the top of the belt conveyor and used for collecting materials. A head protective cover 42 arranged at the head of the belt conveyor prevents the materials from scattering, and a transmission roller 43 is arranged at the head of the belt conveyor and is used for driving a belt to rotate; the sweeper 44 is arranged on the side surface of the head shield 42 and used for cleaning materials on the back surface of the conveying belt; a retaining band 45 is provided at a position corresponding to the head cover 42, and the retaining band 45 prevents the material from scattering from the belt of the belt conveyor. A convex arc segment frame 46 is provided on the underside of the belt retaining strip 45 of the belt conveyor for changing the belt travel direction of the belt conveyor. Pinch rollers 47 are provided at the lower end of the belt conveyor, at both ends of the belt, corresponding to the convex arc segment frames 46, the pinch rollers 47 serving to change the direction of the belt.

Further, the belt conveyor shown in fig. 3 is provided with a resist roller 48 that prevents the deviation of the conveyor belt, which is preferably disposed below the convex arc segment frame 46. The middle position of the conveying belt is provided with a middle frame 49, a middle frame supporting leg 50 and an upper supporting roller 51, the middle frame 49, the middle frame supporting leg 50 and the upper supporting roller 51 are arranged in parallel, and the sequence of the three can be adjusted according to the setting place. An intermediate frame 49 for supporting the idler, intermediate frame legs 50 for supporting the intermediate frame, and upper idlers 51 for supporting the conveyor belt.

At the lower gentle section of the conveying belt, a concave arc section frame 52 for changing the direction of the conveying belt is arranged, and a direction-changing roller 53 for changing the direction of the conveying belt in cooperation with the concave arc section frame 52 is further arranged. Further, a lower supporting roller 54 for supporting the conveying belt, a material guide groove 55 for guiding materials to fall into the conveying belt, and an empty section sweeper 56 for cleaning materials on the back of the conveying belt are arranged on the gentle section of the lower section of the conveying belt.

At the tail end of the conveyor belt there are provided tail rollers 57 for changing the direction of the conveyor belt, tensioning devices 58 for changing the friction between the rollers and the conveyor belt, and a tail stock 59 for holding the tail rollers.

As shown in fig. 4, the modular assembled sorting unit used in the whole grain cascade combined sorting system adopts autogenous medium (fine coal contained in raw coal to be sorted) and air to form gas-solid two-phase mixed medium; different separation density intervals are formed due to different components in each interval, and the burial depth of the separated materials in the medium layer of each step interval is different, so that the materials with different densities in each step interval are finally separated; the vibration motor on the back of the main machine is used for making the materials do stepped spiral overturning motion when the sorting bed surface is used for sorting for multiple times in a stepped interval. More specifically, raw coal materials enter a bed surface from a feeding port for sorting, a plurality of rows of partition plates are arranged on the bed surface, the materials are subjected to vibration sorting on a limited area under the delay of the partition plates and the blocking of a back plate, an exciting force is provided by a vibration motor, and the sorted materials are discharged from discharge ports of clean coal, middlings and gangue through a discharge weir plate respectively. The rightmost side of the bed surface is provided with a gangue discharge regulating gate for discharging large gangue or gangue with larger cumulant. The bed surface is suspended through a hanging mechanism, and vibration sorting is carried out by using a vibration motor to provide exciting force.

In addition, the rapid dehydration unit, the dry dense medium fluidized bed separation unit, the modular assembly type main separation, the modular assembly type re-separation and the combined process auxiliary equipment in the full-grain cascade combined separation system respectively adopt corresponding dust removal systems so as to ensure that the content of solid particles in the discharged air meets the environmental protection requirement; in addition, the dry system dust and the dry heavy medium system dust are transferred to the dust belt conveyor of the modular assembly type separation unit through the dry system dust belt conveyor and the dry heavy medium system dust belt conveyor, and then are conveyed to the belt conveyor of the clean coal product of 0mm-30mm, and the clean coal product is mixed.

Compared with the existing wind power separation process and the existing modularized assembly type separation process, the full-size-class combined separation system of the utility model has the recleaning process, the recleaning of the fine-grain clean coal of 0mm-13mm is carried out, the separation size class is narrowed compared with the feeding of 0mm-30mm, the separation effect is enhanced, the quantity efficiency is increased, and the separation lower limit is reduced; the quality of the clean coal is improved again on the basis of improving the quality of the primary separated coal.

The utility model discloses full grade combined separation system simplifies process flow, environmental pollution is few, the transport capacity of clean coal has been improved indirectly, fundamentally has solved the sieve mesh jam problem when this system has improved classification efficiency, thereby greatly reduced the energy consumption, simultaneously this cloth wind, the surface damage of cloth mechanism to the material is also less, thereby showing and improving productivity, and follow-up dust removal effect is good, make the classification granularity controllable, adjustable, and improved the classification, it is dry, cooling efficiency, have low energy consumption, high treatment capacity and advantage of selecting effectual, also satisfied 360 degrees full ring direction cloth grader's of cloth pan feeding granularity of no sieve classification simultaneously, realized the high-efficient classification to the tiny particle material, guarantee its separation efficiency and classification efficiency, reduce cost, and improved the classification, it is dry, cooling efficiency, The system can avoid the separation of the coal, improve the positive effect on the product quality, reduce the cost, fully play the advantages of two kinds of separators, improve the separation efficiency of a subsequent separation device, has high separation efficiency, and improves the classification, drying and cooling efficiency, thereby being beneficial to realizing uniform material distribution.

In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A full-grain cascade combined sorting system is characterized by comprising a raw coal preparation unit, a rapid dehydration unit, a dry method dense medium fluidized bed sorting unit and an assembled modular sorting unit; the raw coal preparation unit is used for scattering and primarily treating raw coal from a mine or a bunker, and then conveying the raw coal to the rapid dehydration unit; the rapid dehydration unit adopts hot air generated by a circulating air supply system to dehydrate and dry raw coal; the dry dense medium fluidized bed separation unit is used for carrying out dry dense medium fluidization vibration separation on the loose coal material dehydrated and dried by the rapid dehydration unit; the assembled modular sorting unit is used for concentrating the slack coal sorted by the dry dense medium fluidized bed sorting unit.

2. The whole grain cascade combined sorting system according to claim 1, wherein the whole grain fraction comprises 0mm-80mm raw coal, the 0mm-80mm raw coal is primarily processed raw coal, and the primary processing is to perform coarse screening processing on large-grain-size lump coal.

3. The whole grain cascade combined sorting system according to claim 2, wherein the dry dense medium fluidized bed sorting unit is used for sorting raw coal with the grain size of 30-80 mm, and the assembled modular sorting unit is mainly used for sorting raw coal with the grain size of 0-30 mm.

4. The whole grain cascade combined sorting system of claim 3, wherein the whole grain cascade combined sorting system comprises a raw coal belt conveyor of 0mm-80mm, a raw coal grading sieve and a raw coal sieve distribution bag dust remover.

5. The whole grain cascade combined sorting system according to claim 4, wherein a 0mm-80mm raw coal belt conveyor is used for conveying raw coal accumulated at a coal receiving position to a raw coal classifying screen, the raw coal classifying screen is arranged in a raw coal screening workshop, and the raw coal classifying screen is used for screening the raw coal and dividing the raw coal into two parts, namely raw coal larger than 30mm and raw coal smaller than 30 mm; a fully-sealed raw coal screen distribution bag dust remover is arranged on a raw coal screening workshop and is used for removing dust in the raw coal screening workshop.

6. The full grain cascade combined sorting system according to claim 5, further comprising a first main coal feeding belt conveyor, a second dry coal feeding belt conveyor, a main coal blending scraper conveyor, a reciprocating drying device and a dry shallow slot heavy medium coal feeding belt conveyor, wherein the first main coal feeding belt conveyor and the second dry coal feeding belt conveyor are arranged at the rear end of the raw coal grading screen, the first main coal feeding belt conveyor is used for conveying raw coal from the raw coal grading screen to the main coal blending scraper conveyor, and the second dry coal feeding belt conveyor is used for conveying lump coal obtained by screening through the raw coal grading screen to the reciprocating drying device or the dry shallow slot heavy medium coal feeding belt.

7. The whole grain cascade combined sorting system according to claim 6, wherein the material conveyed by the second dry coaling belt conveyor is dedusted by a raw coal screen distribution bag deduster.

8. The whole grain cascade agglomerative separation system of claim 1, wherein a main coal blending scraper is used to distribute raw coal to the dry dense media fluidized bed separation unit.

9. The full grain cascade combined sorting system of claim 1, wherein the 13mm-30mm main lump coal conveyor transports and transfers 13mm-30mm clean coal to the clean powder coal transfer conveyor.

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