WO2020098707A1 - Air dry sand coal sorting system - Google Patents

Abstract

An air dry sand coal sorting system, comprising a machine body (2), a sorting system (3), a coal discharge system (4), a gangue discharge system (5), a medium processing system (6), an electric control system (7), a dust removal system (8) and an auxiliary system (9). The sorting system (3), the coal discharge system (4), the gangue discharge system (5), and the medium processing system (6) are all located in the machine body (2). The coal discharge system (4) and the gangue discharge system (5) use and cooperate with a coal block layer and a gangue layer on the sorting system (3) respectively. A discharge port on the coal discharge system (4) and a discharge port on the gangue discharge system (5) are separately in communication with a feeding port on the medium processing system (6). A discharge port on the medium processing system (6) communicates with a feeding port on the sorting system (3). The electric control system (7) is separately electrically connected to the sorting system (3), the coal discharge system (4), the gangue discharge system (5), the medium processing system (6), the dust removal system (8) and the auxiliary system (9). A dust removal port of the dust removal system (8) communicates with the machine body (2). A discharge port on the auxiliary system (9) is connected to the feeding port on the sorting system (3). Compared to the prior art, the described system has the advantage of being able to completely replace a water method for coal sorting and composite air separation, which effectively reduces the cost of coal sorting and significantly improves the efficiency of coal sorting.

Description

Air dry sand coal preparation system Technical field

The invention relates to the technical field of coal separation, in particular to an air dry sand coal preparation system.

Background technique

China is a major coal-producing country. With the rapid development of the coal industry and the continuous improvement of the coal mining mechanization level, the quality of raw coal continues to decline. At the same time, in order to improve economic efficiency and meet the needs of environmental protection, coal users continue to propose more High requirements, unsorted raw coal can not be used, so coal preparation has become an indispensable important link in the process of coal production and utilization. The essence of raw coal sorting is to use the difference in physical and chemical properties of coal and other minerals to mechanically remove impurities in raw coal, such as gangue, pyrite, etc., to separate raw coal into refined coal products of different quality specifications.

With the development of coal preparation industry, the separation process of raw coal can be divided into two types: water separation and dry separation, both of which have great problems and disadvantages.

Water Separation: Before the last century, all coal preparation methods in the world were inseparable from water-coal preparation is all carried out in aqueous solution, using the difference in particle size and density of coal and gangue in solution For sorting, the most widely used methods are jig sorting, heavy medium sorting and flotation. Because the traditional coal preparation method must be sorted in aqueous solution, it leads to the following problems:

1. Coal preparation must use water and consume water. The average water consumption for processing 1 ton of raw coal is 0.2m ^{3. At} most, 3 tons of water are used. However, the geological structure and geographical location of the mining area are destined to be deficient in water sources. Even if the coal is not produced on the earth There are also more than one-fifth of the districts where there is a serious shortage of water. The natural water source cannot meet the needs of coal preparation. Either manually adjust the water, or transport the raw coal to a place where there is sufficient water source for centralized separation. The cost is high and the operation is inconvenient.

2. The outflow of slime sewage not only causes coal loss, but also seriously pollutes the environment, causing soil compaction and other problems. In order to reduce a large amount of external slime sewage, the closed circuit of washing water must be realized. To achieve the closed circuit of washing water, sewage must be carried out. For purification treatment, special sewage purification system equipment must be attached for this purpose, which is costly and reduces the efficiency of coal preparation.

3. The moisture in the coal seriously affects and even determines the quality index of the product, and at the same time increases the invalid transportation. In the cold and cold regions, the wet coal winter transportation will also cause the frozen car to rise. In order to reduce the moisture content of the selected product, a special Dehydration machinery performs dehydration, but dehydration is only relative rather than absolute. With current dehydration technology, the product after dehydration still contains a certain amount of water, which is not conducive to the direct utilization of coal.

4. The separation is not complete, there is gangue in the coal, and there is coal in the gangue, because there is no clear interface between the coal and gangue in the jigging coal separation process, the separation is not complete, and the comprehensive separation effect does not exceed 80%. The separation quality is low. China's heavy-medium coal preparation technology began in 1958. The coal preparation process is more complicated, equipment and pipelines are easy to wear, and the maintenance and maintenance workload is large. The requirements on operation and adjustment are more strict. The separation effect of suspension coal preparation is better, but the large medium consumption is still a major problem that plagues China's heavy medium coal preparation. In the coal preparation production practice, the medium consumption is about 1.5kg / t, which is a very good level In general, the media consumption of coal preparation plants is around 3kg / t, slightly higher is 5-6kg / t, and some coal preparation plants have reached 10kg / t or even higher.

5. The coal preparation process is complicated, and a large amount of auxiliary mechanical equipment is required, which leads to huge investment in the construction or transformation of the coal preparation plant, which is often tens of millions of yuan, or even hundreds of millions of yuan.

Dry method selection:

The first stage is the foundation laying stage: In 1984, China University of Mining and Technology was the first in the world to study dry coal preparation, completed laboratory basic research, model test research, and established the "air heavy medium steady-state fluidization" mineral processing theory. On May 28, 1987, the application number of "Dry Fluidized Bed Coal Preparation Device" was filed with the China Intellectual Property Office: 8710105. Since then, China University of Mining and Technology has begun to implement the project and carry out industrialization trials in Baijiazhuang, Taiyuan. The coal mine established the world's first test base, but the device has the following problems:

1. The gangue discharge method is to use the scraper to push the scraper forcefully, which causes the core components to be frequently blocked and damaged by debris such as gangue, coal slime, etc., and cannot work normally. After several improvements, the use of other schemes still cannot meet the normal use requirements.

2. The medium used is granular iron sand, which consumes too much, and consumes hundreds of tons per year. On the one hand, it increases costs and wastes resources. On the other hand, when these iron sands are burned in coal, the high temperature and heat are easy to damage the boiler.

3. The overall cost is too high and the production efficiency is low, which cannot be used in industrial applications.

The second stage is the exploration stage: the existing domestic composite dry coal preparation technology is also called air separation. Its basic principle is to make the raw coal under the trust of small particles of coal powder rely on external wind force through the swing or vibration of the bed surface. Achieve light and heavy flow. This technology has the following disadvantages:

1. Poor sorting effect: This method only belongs to the "inferior coal elimination plate". As early as 1956, China developed the shaker sorting. This technology only increased the wind power during the shaker sorting, and made a little difference to the shaker sorting. Only improvement, because the coal and gangue do not have a clear interface in the separation process, the more vibrating and solid the bed surface becomes a dead bed, the separation is not complete, and the comprehensive separation effect does not exceed 75%.

2. The sorting efficiency is low.

3. The complex structure and huge volume lead to large production cost, large area, and a processing capacity of 100 tons / hour with a volume of more than 1000 cubic meters, resulting in huge investment in the construction and renovation of coal preparation plants, which is often millions or even tens of millions. yuan.

4. Large energy consumption, the system power of 100 tons per hour needs 300 kilowatts.

5. High production cost and large maintenance cost.

6. There is much dust, which pollutes the environment.

The third stage is the status quo: domestic science and technology workers slightly improved the previous scheme of China University of Mining and Technology in 2008: replacing the original metal cloth wind plate with a polyethylene plastic plate with densely covered small holes and a wind cap, the following problems exist:

1. Blocky and granular gangue still falls directly on the surface of the polyethylene plastic board. Because the scraper is still used to force the scraper, it will quickly block and wear, resulting in failure to work properly.

2. The manufacturing process is complicated, the manufacturing cost is too high, the structure is complicated, and the power consumption is huge, which results in a high cost of coal preparation, which is close to that of water separation.

The above factors have caused the industrial application of dry coal preparation so far.

In summary, because the existing dry coal preparation technology still has many immature problems, it is still not perfect, and it is only in the exploration and trial stage, so it cannot be promoted and applied. At present, water separation is still the main method.

After further improvement and perfection, the inventor has developed a complete set of water-free coal preparation system --- air dry sand coal preparation system to completely solve many disadvantages of traditional coal preparation.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the above technical defects and provide an air dry sand coal preparation system that does not require a water source, has high coal preparation efficiency and low cost.

In order to achieve the above objectives, the technical scheme adopted by the present invention is: an air dry sand coal preparation system, including a machine body, a separation system, a coal discharge system, a waste discharge system, a media processing system, an electronic control system, a dust removal system, an auxiliary The system, the sorting system, coal discharge system, gangue system, and media processing system are all located in the machine body. The coal discharge system and gangue system are used in conjunction with the coal block layer and gangue layer on the sorting system. The discharge port on the coal discharge system and the discharge port on the waste discharge system are respectively connected to the feed port on the media processing system, and the discharge port on the media processing system is connected to the feed port on the sorting system. The electrical control system is electrically connected to the sorting system, coal discharge system, gangue discharge system, media processing system, dust removal system and auxiliary system respectively. The dust removal port of the dust removal system is connected to the machine body, and the discharge port on the auxiliary system is connected separately Select the feed port on the system.

The sorting system is composed of a sorting chamber, an air chamber, a first buffer chamber, a second buffer chamber, and a Roots blower. The bottom of the sorting chamber communicates with the air inlet on the air chamber and is fixed at its communication place A gas distribution plate, a heating net for heating the air in the gas chamber is fixed in the gas chamber, the air inlet on the gas chamber communicates with the air outlet on the first buffer chamber, and the air inlet on the first buffer chamber is The air outlet on the second buffer chamber communicates, and the air inlet on the second buffer chamber communicates with the air outlet on the Roots blower.

The gas distribution plate is composed of a plurality of fixing plates and a plurality of elastic breathable plates. The fixing plates are fixedly connected with the elastic breathable plates, and are arranged at intervals, and a plurality of ventilation holes are integrally formed in the elastic breathable plate.

A gas flow meter and a flow regulating valve are connected to the communication between the first buffer chamber and the second buffer chamber.

The coal discharging system is composed of a rotating shaft, a coal discharging screen, a coal discharging channel, and a motor driving device. The rotating shaft is rotatably provided at the upper end of the sorting chamber, and one end of the rotating shaft is drivingly connected to the motor driving device. The coal discharge screen is composed of a plurality of coal discharge bars, the coal discharge bars are evenly distributed on the outer end surface of the rotating shaft, the feed port on the coal discharge channel communicates with the sorting chamber, and it cooperates with the coal discharge screen.

The motor driving device includes a first motor and a speed reducer drive-connected with the first motor, and the speed reducer is drive-connected with a rotating shaft.

The gangue discharge system includes a gangue screening device, a gangue pushing device, a first gangue negative pressure device, a gangue suction device, a gangue crushing device, and a second gangue negative pressure device. The gangue screening device is used in conjunction with the gangue pushing device. The pushing device is matched with the first gangue negative pressure device, the gangue pushing device is used with the gangue suction device, the gangue suction device is used with the gangue crushing device, and the second gangue negative pressure device is used with the gangue suction device.

The gangue sieving device is composed of a bottom sieve layer and a side sieve layer, the bottom sieve layer is fixedly arranged in the sorting chamber, one end of the side sieve layer is fixedly connected to the inner wall of the sorting chamber, and the other end is connected to the bottom The sieve layer is fixedly connected, and the side sieve layer and the bottom sieve layer have a certain inclination. The bottom sieve layer and the side sieve layer are both composed of sieve bars, and there are certain blanking sieve gaps between adjacent sieve bars .

The gangue pushing device is composed of a moving base, a top rod and a return rod, the top rod and the return rod are respectively fixed on both sides of the bottom of the sorting room, the mobile base is slidably arranged in the sorting room, and the moving base The upper rotation is provided with a rotary rod, the rotary rod is fixedly connected with a linkage plate, the linkage plate is respectively used with the ejector rod and the return rod, and the linkage plate is forced to drive the rotary rod to rotate, and the rotary rod is fixed A row of gangue claws is connected, and the end of the row of gangue claws is exposed above the bottom screen layer.

The first gangue negative pressure device is composed of a first negative pressure chamber, a first double gate, a first star-shaped discharge valve of the partition plate, a second star-shaped discharge valve, a string screen and a first induced draft fan. A feed port on a negative pressure chamber communicates with the sorting chamber and its communication position is located at the end of the bottom sieve layer side, a first double gate is provided at the communication position between the first negative pressure chamber and the sorting chamber, and the partition is fixed It is arranged in the first negative pressure chamber, and it forms a gangue discharge chamber and a discharge medium chamber in the first negative pressure chamber, the discharge port on the discharge gangue chamber communicates with the feed port on the first star-shaped discharge valve, The discharge port on the discharge cavity communicates with the feed port on the second star-shaped discharge valve. The string screen is fixedly arranged on the top of the discharge cavity. A pair of gate outlets are connected, and the other end is fixedly connected to the top of the partition. The air inlet on the first induced draft fan is in communication with the first negative pressure chamber, and a first magnetic filter screen is provided between the communication points. .

The gangue suction device is composed of a suction tube, a feeding tube and a moving device. The suction tube is located at the bottom of the sorting chamber and fixed on the mobile base, and a suction hole is opened at the bottom of the feeding tube. The feed port is in communication with the discharge port on the suction tube, and the discharge port on it is in communication with the feed port on the second gangue negative pressure device. The feed tube is connected to the mobile device and under the control of the mobile device Move back and forth.

The moving device includes a second motor, a ball screw, and a connecting base. The ball screw is connected to the second motor. One end of the connecting base is connected to the ball screw, and the other end is connected to the feeding tube.

The gangue crushing device is composed of a rotating rod, a first crushed stone rod and a rack. The rotating rod is located in the suction pipe and freely rotates in the suction pipe. The rack is fixed at the bottom of the sorting chamber. Both ends of the rod are meshed with the rack gear, the first crushed stone rod is evenly distributed on the outer end surface of the rotating rod, and a second crushed stone rod is fixedly arranged on the inner wall of the suction pipe, and the second crushed stone rod is The first gravel rods are interlaced.

The second gangue negative pressure device is composed of a second negative pressure chamber, a second double gate, a third star-shaped discharge valve, a hose and a second induced draft fan. The feed inlet on the second negative pressure chamber is The discharge port on the second double gate is in communication, the feed port on the second double gate is in communication with the discharge port on the hose, and the feed port on the hose is in communication with the discharge port on the feed pipe , The feed port on the third star-shaped discharge valve communicates with the second negative pressure chamber, and the discharge port thereon communicates with the feed port on the media processing system, and the second induced draft fan is connected to the second The negative pressure chamber is in communication, and a second magnetic filter screen is arranged in the communication between them.

The media processing system is composed of a medium coarse decoupling device, a medium fine decoupling device, a belt decoupling device, and a media silo. The media silo is fixed at the bottom of the machine body and connected to the coal discharge system. The media in the media decoupling device The device is used in conjunction with the coal discharge system, the media processing system connected to the gangue system, and the medium coarse removal device in the device is used in conjunction with the gangue system. The discharge port on the medium coarse removal device and the medium fine removal device The feed port is in communication, and the discharge port on the medium fine stripping device communicates with the feed port on the belt stripping device, and the discharge port on the belt stripping device communicates with the feed port on the media silo. The material outlet on the media bin communicates with the material inlet on the sorting system.

The medium roughing device is composed of a first roughing cylinder, an outer reinforcing cylinder, a collecting hopper, a second roughing cylinder, an inner reinforcing cylinder and spokes. The first roughing cylinder is rotatably arranged in the machine body, and the first A through hole is opened on the wall of the rough stripping cylinder, and both ends of the barrel are fixedly connected with the outer reinforcing barrel. The collecting hopper is fixedly arranged at the bottom of the first rough stripping cylinder, and the discharge port thereon is on the device for fine stripping of the medium The feeding port of the inner reinforcing cylinder is fixed in the outer reinforcing cylinder through spokes, the inner reinforcing cylinder is in fixed communication with the second coarse stripping cylinder, and the second coarse stripping cylinder wall is provided with a feed slot, The discharge port on the second coarse stripping cylinder and the discharge port on the first coarse stripping cylinder are both in communication with the feed port on the belt disengagement device. When the media processing system is connected to the waste discharge system, the The feed port on the second coarse stripping cylinder is in communication with the discharge port on the first star-shaped discharge valve and the discharge port on the second star-shaped discharge valve. When the media processing system is connected to the coal discharge system , The feed port on the second roughing drum communicates with the discharge port on the coal discharge channel.

The medium fine stripping device is composed of a fine stripping base, a first fixed shaft, a roller, a first bearing, an arc frame, a first transfer barrel, a discharge barrel, and a third motor, and the fine stripping base is fixedly arranged on the body Inside, the first fixed shaft is fixedly arranged on the fine decoupling base, the roller is rotatably arranged on the first fixed shaft through the first bearing, and it is located directly under the collecting hopper, and the arc frame is fixed on the first fixed Several permanent magnet blocks are fixedly arranged on the shaft, and the magnetic force of the adjacent permanent magnet blocks at the outer surface of the drum is different. The discharge barrel is fixedly arranged on the fine-off base and is on the same side as the arc frame , The discharge port on the discharge barrel communicates with the feed port on the belt disengagement device, the first transfer barrel is fixedly set on the fine stripping base, and it is located directly below the end of the arc frame. The discharge port on the first material transfer cylinder is in communication with the media bin, and the third motor is connected to the drum drive.

The belt disengagement device is composed of a belt disengagement base, a second fixed shaft, a second bearing, an arc-shaped magnetic ring, a driving wheel, a driven wheel, a conveyor belt, a second transfer barrel, and a fourth motor. The base is fixedly arranged in the machine body, the second fixed shaft is fixedly arranged on the belt disengagement base, the driving wheel is rotated and arranged on the second fixed shaft through a second bearing, and the arc-shaped magnetic ring is fixedly arranged on the second On the fixed shaft, and it has a certain gap with the inner wall of the driving wheel, the driven wheel is rotatably arranged on the belt disengagement base, the driving wheel and the driven wheel are driven by a conveyor belt, and the second transfer cylinder is fixedly arranged on the belt On the disengagement base, which is located directly under the end of the arc-shaped magnetic ring, the discharge port on the second transfer barrel communicates with the media compartment, and the fourth motor is connected to the driving wheel.

A medium conveying pump is fixedly arranged in the machine body. The feed end of the medium conveying pump is in communication with the media silo, and the discharge port on the medium is connected to the sorting chamber. The sorting chamber is fixedly provided with a material level sensor. The media delivery pump is used in conjunction with the level sensor.

The electric control system is composed of a control room and a control host. The control host is fixedly installed in the control room. The control host is separated from the sorting system, coal discharge system, waste discharge system, media processing system, dust removal system and auxiliary system. Electrical connection.

The dust removal system is composed of a dust collector and a dust removal pipe. The dust suction port on the dust collector communicates with the dust outlet on the dust removal pipe, and the dust outlet on the dust removal pipe communicates with the inside of the machine body.

The auxiliary system is composed of a plurality of belt conveyors, which are respectively used in cooperation with the material outlet on the belt disengagement device and the material inlet on the sorting room.

After adopting the above structure, the advantages of the present invention compared with the prior art are:

1. The entire separation process is carried out completely in air and dry solid medium, without the need of water source, and there is no need to concentrate the separation of raw coal in different places. Even in high, cold, arid and waterless areas, normal coal preparation can be performed on site, which is The requirements are extremely low, and its footprint is only 1/3 of that of traditional technology. The footprint is small, which greatly improves the applicable scope of sorting and reduces the cost of sorting.

2. Does not involve the dehydration problem after coal preparation, but also fundamentally solves the problem of polluting the environment in sewage discharge and the cost of sewage purification treatment and the loss of coal caused by sewage discharge.

3. The raw coal not only does not contact with water but also further reduces the moisture content of the clean coal during the separation process, which not only improves the quality index of the product, but also effectively reduces the invalid transportation, and there is no worries about the freezing of the car during the winter transportation of the coal in the cold area. .

4. The separation quality is high, the bed surface is fully loosely separated, there is a clear boundary between clean coal and gangue, the separation is complete, and the separation rate is close to 100%.

5. Low energy consumption, safety, environmental protection, simplified separation process, high degree of automation, no need for human participation, greatly reduced the production cost of coal preparation, the separation cost per ton of raw coal cost only a few dollars than water Choose tens of yuan per ton.

6. The structure of the main machine is simple, easy to install and production management, the manufacturing cost is lower than the traditional coal preparation machinery, no civil engineering is needed, a main machine is a coal preparation plant, which can be installed on the flat ground to select coal without other auxiliary facilities, Construction or transformation of coal preparation plants under the same conditions can save more than 1/2 of the cost.

7. The medium loss is small, and the boiler is not damaged when the coal is burned, which effectively saves costs.

8. The production efficiency is high, the quality of the whole machine is stable, and it can work continuously 24/7 without frequent maintenance, and the service life is long.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural view of an air dry sand coal preparation system of the present invention.

2 is a schematic structural view of a separation system in an air dry sand coal preparation system of the present invention.

3 is a schematic view of the right side view of the coal discharge system and the waste discharge system in an air dry sand coal preparation system of the present invention.

4 is a partial front view of the structure of the gangue discharge system in an air dry sand coal preparation system of the present invention.

5 is a schematic structural diagram of a medium roughening device in a medium processing system in an air dry sand coal preparation system of the present invention.

6 is a schematic structural diagram of a medium fine removal device in a medium processing system in an air dry sand coal preparation system of the present invention.

7 is a schematic structural diagram of a belt disengagement device in a media processing system in an air dry sand coal preparation system of the present invention.

As shown in the figure: 2, body, 3, sorting system, 301, sorting chamber, 302, gas chamber, 303, gas distribution plate, 305, first buffer chamber, 306, second buffer chamber, 307, roots Fan, 308, fixed plate, 309, elastic ventilation plate, 310, heating net, 311, gas flow meter, 312, flow regulating valve, 4, coal discharge system, 401, rotating shaft, 402, coal discharge screen, 403, discharge Coal channel, 404, coal discharge rod, 405, first motor, 5, gangue discharge system, 501, gangue screening device, 502, gangue pushing device, 503, first gangue negative pressure device, 504, gangue suction device, 505, gangue crushing device, 506, second gangue negative pressure device, 507, bottom sieve layer, 508, side sieve layer, 509, sieve bar, 510, moving base, 511, top rod, 512, return rod, 513, Rotating rod, 514, linkage plate, 515, row gangue, 516, first negative pressure chamber, 517, first double gate, 518, partition, 519, row gangue chamber, 520, row chamber, 521, first Star discharge valve, 522, second star discharge valve, 523, string screen, 524, first induced draft fan, 525, first magnetic filter screen, 526, suction tube, 527, suction hole, 528 , Feeding tube, 529, second motor, 530, ball screw, 531, connecting seat, 532, rotating rod, 533, gear, 534, rack, 535, first gravel rod, 536, second gravel rod , 537, second negative pressure chamber, 538, hose, 539, second double gate, 540, third star discharge valve, 541, second induced draft fan, 542, second magnetic filter screen, 543, double gate Room, 544, first gate, 545, second gate, 6, media processing system, 601, medium coarse removal device, 602, medium fine removal device, 603, belt release device, 604, medium storage, 605, first Coarse stripping barrel, 606, feed hole, 607, outer reinforcement barrel, 608, collecting hopper, 609, second rough stripping barrel, 610, feed strip slit, 611, inner reinforcement barrel, 612, spokes, 613, fine stripping Base, 614, first fixed shaft, 615, roller, 616, first bearing, 617, arc frame, 618, permanent magnet block, 619, discharge barrel, 620, first transfer barrel, 621, third motor , 622, belt disengagement base, 623, second fixed shaft, 624, driving wheel, 625, second bearing, 626, curved magnetic ring, 627, driven wheel, 628, conveyor belt, 629, second transfer barrel, 630, fourth motor, 631, medium delivery pump, 632, material level sensor, 7, electronic control system, 701, control room, 702, control host, 8, dust removal system, 801, dust collector, 9, auxiliary system, 901 , Belt conveyor.

detailed description

The present invention will be further described in detail below with reference to the drawings.

An air dry sand coal preparation system, a certain number of air dry sand coal preparation systems 1 can be selected according to the amount of coal preparation, to avoid excessive useless work of the entire system, and to improve the efficiency of coal preparation, including machine body 2, separation system 3. Coal discharge system 4, gangue discharge system 5, media processing system 6, electric control system 7, dust removal system 8, auxiliary system 9, the whole body 2 is steel structure, which has good support and protection for the internal components, sorting System 3 is used to separate coal from gangue, coal discharge system 4 is used to discharge the separated coal, gangue system 5 is used to discharge the separated gangue, and media treatment system 6 is used to remove the medium from the mixture of media and coal The mixture of material or medium and gangue is separated and then sent to the sorting system 3 again. The control system 7 is used for overall automatic control for easy operation. The dust removal system 8 is used to suck out the dusty air in the body 2 And filter out the dust to prevent the dust from damaging the internal components and polluting the external environment. The auxiliary system 9 is used for the transportation of materials. The sorting system 3, coal discharge system 4, gangue discharge system 5, media processing system 6 are located in the machine body 2, the coal discharge system 4 and the gangue system 5 are respectively used in conjunction with the coal block layer and the gangue layer on the sorting system 3, the discharge port and the gangue system on the coal discharge system 4 The discharge ports on 5 are respectively connected to the feed ports on the medium processing system 6, the discharge ports on the medium processing system 6 are connected to the feed ports on the sorting system 3, and the electronic control system 7 is separately connected to the sorting System 3, coal discharge system 4, gangue discharge system 5, media processing system 6, dust removal system 8 and auxiliary system 9 are electrically connected, the dust removal port of the dust removal system 8 is connected to the body 2, and the discharge port of the auxiliary system 9 is connected Feed port on the sorting system 3.

In order to make the separation effect of coal and gangue better, further, the separation system 3 is composed of a separation chamber 301, an air chamber 302, a first buffer chamber 305, a second buffer chamber 306, and a Roots blower 307. The sorting chamber 301 is an effective carrier in the form of a medium forming fluid. The bottom of the sorting chamber 301 communicates with the air inlet on the gas chamber 302 and a gas distribution plate 303 is fixed at the communication place. The air in the sorting chamber 301 is more uniform. A heating grid 304 for heating the air in the gas chamber is fixed in the air chamber 302. The heating grid 304 can ensure the drying in the sorting chamber 301, which is beneficial for the medium to form a fluid form better , Can also reduce the moisture content of the coal surface, and can also ensure that in high and cold areas can work without preheating various components, the heating net 310 is fixed in the air chamber 302 near the air inlet, the heating net 310 mesh surface and intake The direction is vertical, and the heating net 310 is composed of a number of heating wires distributed in a grid shape. The heating wires have a fast heating speed and high efficiency. At the same time, a heating plate or the like can also be used. The air inlet on the air chamber 302 and the first An air outlet on a buffer chamber 305 communicates with the air inlet on the first buffer chamber 305 communicates with an air outlet on the second buffer chamber 306, and the air inlet on the second buffer chamber 306 communicates with a Roots blower The air outlet on the 307 is connected, the compressed air blown by the Rhodes fan 307 enters the first buffer chamber 306 to mix evenly and then enters the first buffer chamber 306 to mix, to ensure that the compressed air in the sorting chamber 301 is more uniform, further, The gas distribution plate 303 is composed of a plurality of fixing plates 308 and a plurality of elastic breathable plates 309, the fixing plates 308 are fixedly connected to the elastic breathable plates 309, and are arranged at intervals therebetween, the elastic breathable plates 309 are integrally formed There are several vent holes, the elastic ventilation plate 309 is made of felt board, and the fixed plate 308 is made of steel plate to ensure uniform ventilation while improving the overall stability. Further, the first buffer chamber 305 is connected to the second buffer chamber 306 There is a gas flow meter 311 and a flow regulating valve 312 to improve the overall automation control and facilitate monitoring and maintenance.

In order to ensure that the separated coal is better discharged from the sorting chamber 301, further, the coal discharging system 4 is composed of a rotating shaft 401, a coal discharging screen 402, a coal discharging channel 403 and a motor driving device, the rotating shaft 401 is rotatably disposed at the upper end of the sorting chamber 301, one end of the rotating shaft 401 is drivingly connected to a motor driving device, the coal discharge screen 402 is composed of a plurality of coal discharge rods 404, and the coal discharge rods 404 are evenly distributed in rotation On the outer end surface of the shaft 401, the feed port on the coal discharge channel 403 communicates with the sorting chamber 301, and it cooperates with the coal discharge screen 402. Further, the motor driving device includes a first motor 405 and A motor 405 drives a reducer connected to the drive. The speed reducer is connected to the rotating shaft 401. The first motor 405 drives the reducer to rotate. The reducer drives the rotating shaft 401 to rotate, and the coal discharge screen 402 on the rotating shaft 401 rotates accordingly. Under the agitation of the coal discharge screen 402, the coal lump floating on the surface of the medium is removed from the separation chamber 301 into the coal discharge channel 403. This method will not cause damage to the gas distribution plate 303, and the coal discharge efficiency is high , The dielectric loss is small.

In order to ensure that the separated gangue is better discharged from the sorting chamber 301, further, the gangue discharging system 5 includes a gangue screening device 501, a gangue pushing device 502, a first gangue negative pressure device 503, a gangue suction device 504. Gangue crushing device 505 and second gangue negative pressure device 506, gangue sieving device 501 cooperates with gangue pushing device 502, gangue pushing device 502 cooperates with first gangue negative pressure device 503, gangue pushing device 502 and gangue suction The gangue suction device 504 cooperates with the gangue crushing device 505, and the second gangue negative pressure device 506 cooperates with the gangue suction device 504. Further, the gangue screening device 501 is composed of a bottom sieve layer 507 It is composed of a side screen layer 508, the bottom screen layer 507 is fixedly arranged in the sorting room 301, one end of the side screen layer 508 is fixedly connected to the inner wall of the sorting room 301, and the other end is fixed to the bottom screen layer 507 Connection, the side screen layer 508 and the bottom screen layer 507 have a certain inclination, the bottom screen layer 507 and the side screen layer 508 are composed of screen bars 509, and there is a certain drop between adjacent screen bars 509 When the gangue sinks from above the medium to the bottom layer of the medium, the larger gangue will fall onto the bottom sieve layer 507, and the smaller one will sink from the sieve to the bottom layer of the medium, effectively screening the gangue The gangue pushing device 502 is composed of a moving base 510, a top rod 511 and a return rod 512. The top rod 511 and the return rod 512 are respectively fixed in the sorting unit On both sides of the bottom of the chamber 301, the mobile base 510 is slidably arranged in the sorting chamber 301, a rotary rod 513 is rotatably provided on the mobile base 510, and a linkage plate 514 is fixedly connected to the rotary rod 513, and the linkage plate 514 is used in cooperation with the top rod 511 and the return rod 512, and the linkage plate 514 is forced to rotate the rotating rod 513. The rotating rod 513 is fixedly connected with a row of gangue claws 515, the end of the row of gangue claws 515 is exposed In the upper part of the bottom sieve layer 507, in order to prevent the gangue 515 from rotating at a large angle, a positioning baffle should also be provided as a limit for the gangue 515. During operation, the movement of the mobile base 510 can drive the gangue 515 to move At this time, the discharge gangue 515 is in contact with the positioning baffle to reach the limit. The discharge gangue 515 can push the large particles of gangue on the bottom sieve layer 507 blanking screen seam to move. When it reaches the end of the sorting box gangue exit At this time, large particles of gangue can be discharged; and at this time, the top rod 511 will bear against the linkage plate 514 and let it rotate. The rotation of the linkage plate 514 will drive the rotary rod 513 to rotate, and the rotation of the rotary rod 513 will drive the gangue claw 515 to Rotate it downward to make it located at the lower part of the bottom sieve layer 507, so that when the moving base 510 returns to the position, it can make the return position smoother; when the moving base 510 returns to the original position, the return lever 512 will bear the linkage plate 514, Let the linkage plate 514 drive the rotating rod 513 to reversely rotate, so that the gangue claw 5 The upper end of 15 returns to the top of the bottom screen layer 507 for the next gangue pushing operation. Further, the first gangue negative pressure device 503 is composed of a first negative pressure chamber 516, a first double gate 517, and a partition plate 518. A star-shaped discharge valve 521, a second star-shaped discharge valve 522, a string sieve 523, and a first induced draft fan 524, the feed port on the first negative pressure chamber 516 communicates with the sorting chamber 301 and its communication point Located at the end of the bottom screen layer 507 side, a first double gate 517 is provided where the first negative pressure chamber 516 communicates with the sorting chamber 301, the partition 518 is fixedly disposed in the first negative pressure chamber 516, and A gangue discharge chamber 519 and a discharge chamber 520 are formed in the first negative pressure chamber 516, and the discharge port on the discharge chamber 519 communicates with the feed port on the first star-shaped discharge valve 521. The material outlet on the cavity 520 communicates with the material inlet on the second star-shaped discharge valve 522, the string screen 523 is fixedly arranged on the top of the discharge chamber 520, and the material inlet on the string screen 523 is The discharge port of the first double gate 517 is in communication, and the other end is fixedly connected to the top of the partition 518. The air inlet on the first induced draft fan 524 is in communication with the first negative pressure chamber 516, and a communication point is provided therebetween The first magnetic filter screen 525, during operation, the first induced draft fan 524 draws the air in the first negative pressure chamber 516 to form a vacuum in the first negative pressure chamber 516, the first negative pressure chamber 516 is opened in the first double gate mechanism 517 When the mixture of gangue and media pushed out by the gangue pushing system 502 can be sucked in, the mixture first passes through the string sieve 523. The string sieve 523 can pass through the medium but cannot pass through the gangue. The first star-shaped discharge valve 521 is discharged to the next process, the medium falls into the discharge chamber 520 and is discharged to the next process through the second star-shaped discharge valve 522, because the mixture will generate dust during the movement, These dusts will be filtered in the first magnetic filter screen 525 before entering the first induced draft fan 524, and the filtered media will then be discharged immediately. Further, the gangue suction device 504 is composed of a suction pipe 526 and feed A tube 528 and a moving device are formed. The suction tube 526 is located at the bottom of the sorting chamber 301 and is fixed on the moving base 510, and a suction hole 527 is opened at the bottom thereof. The feed port on the feed tube 528 and the suction device The discharge port on the tube 526 is in communication, and the discharge port on the tube 526 is in communication with the feed port on the second gangue negative pressure device 506, the feed tube 528 is connected to the mobile device and reciprocates under the control of the mobile device, Further, the mobile device includes a second motor 529, a ball screw 530, and a connecting seat 531, the ball screw 530 is connected to the second motor 529, one end of the connecting seat 531 is connected to the ball screw 530, and the other One end is connected to the feeding tube 528. During operation, the second motor 529 drives the ball screw 530 to rotate, and the ball screw 530 drives the connecting seat 531 to move. At the same time, the feeding tube 528 connected to the connecting seat 531 will move and bring The movable suction pipe 526 moves, and while the suction pipe 526 absorbs small particles of gangue and medium through the suction hole 527, it can drive the mobile base 510 to move. Further, the gangue crushing device 505 is composed of a rotating rod 532, a first crusher The stone rod 535 and the rack 534 are formed. The rotating rod 532 is located in the suction pipe 526 and freely rotates in the suction pipe 526. The rack 534 is fixedly disposed at the bottom of the sorting chamber 301. The two ends are driven to mesh with the rack 534, the two ends of the rotating rod 532 penetrate the suction tube 526 and are fixedly connected with a gear 533 coaxial with the rotating rod 532, the gear 533 is used in cooperation with the rack 534, the first gravel rod 535 Evenly distributed on the outer end surface of the rotating rod 532, a second crushed stone rod 536 is fixedly arranged on the inner wall of the suction pipe 526, the second crushed stone rod 536 and the first crushed stone rod 535 are interlaced with each other, the suction pipe 526 Driven by the feeding tube 528, it moves back and forth at the bottom of the sorting chamber 301 for suction. During the movement of the suction tube 526, the rotating rod 532 in the suction tube 526 rotates due to the cooperation of the gear 533 and the rack 534. The first crushed stone rod 535 on the rod 532 rotates with it, and the rotating first crushed stone rod 535 and the second crushed stone rod 536 in the suction pipe 526 form a shear fracture of the gangue, and directly slender gangue The debris is converted into granular gangue fragments to avoid clogging problems. Further, the second gangue negative pressure device 506 is composed of a second negative pressure chamber 537, a second double gate 539, a third star discharge valve 540, a soft The tube 538 and the second induced draft fan 541 are formed, and the feed port on the second negative pressure chamber 537 communicates with the discharge port on the second double gate 539, and the feed port on the second double gate 539 is The discharge port on the tube 538 communicates, the feed port on the hose 538 communicates with the discharge port on the feed tube 528, and the feed port on the third star discharge valve 540 is connected to the second negative pressure The chamber 537 is in communication, and the outlet on it is in communication with the inlet on the medium processing system 6, the second induced draft fan 541 is in communication with the second negative pressure chamber 537, and a second magnetic The filter screen 542, during operation, the second induced draft fan 541 draws the air in the second negative pressure chamber 537 to form a vacuum in the second negative pressure chamber 537, and the second induced draft fan 541 can feed the material when the second double gate mechanism 539 is opened The mixture of gangue and medium in the tube 528 is sucked in and discharged through the third star discharge valve 540 to the next process. Since the mixture will generate dust during the movement, the dust will enter the second induced draft fan 541 Filter in the second magnetic filter screen 542, and the filtered medium will be discharged immediately. The first double gate mechanism 517 and the second double gate mechanism 539 have the same structure, and are composed of the double gate chamber 543, the first valve 544, and the first The two valves 545 are formed, the first valve 544 and the second valve 545 are located at the feed end and the discharge end of the double gate chamber 543 respectively, and the feed end and sorting of the double gate chamber 543 of the first double gate mechanism 517 The chamber 301 communicates, and the discharge end communicates with the first negative pressure chamber 516, the feed end of the double gate chamber 543 of the second double gate mechanism 539 communicates with the hose 538, and the discharge end communicates with the second negative pressure chamber 537, when idle The first valve 544 is closed and the second valve 545 is open. During operation, the first valve 544 is closed and the second valve 545 is closed. Due to the vacuum effect, the double gate chamber 543 is in a vacuum state, and then the first valve 544 is opened, the second valve 545 is closed, the mixture is sucked into the double gate chamber 543, then the first valve 544 is closed, then the second valve 545 is opened, the feeding is completed, and the entire process can ensure the first negative pressure chamber 516 Or, the vacuum in the second negative pressure chamber 537 is stable.

In order to ensure better separation of the media from the gangue or coal, further, the media processing system 6 is composed of a media coarse decoupling device 601, a media fine decoupling device 602, a belt decoupling device 603, and a media silo 604, the media silo 604 is fixed to the bottom of the machine body 2 and is connected to the coal discharge system 4 of the media processing system 6, the medium coarse removal device 601 is used in conjunction with the coal discharge system 4, and the media processing system 6 connected to the gangue system 5 The medium coarse decoupling device 601 is used in conjunction with the gangue discharge system 5. The discharge port on the medium coarse decoupling device 601 communicates with the feed port on the medium fine decoupling device 602, and the discharge port on the medium fine decoupling device 602 Communicate with the feed port on the belt disengagement device 603, the discharge port on the belt disengagement device 603 communicates with the feed port on the media bin 604, the discharge port on the media bin 604 and the sorting system The feed port on 3 is connected. Further, the medium roughening device 601 is composed of a first roughening cylinder 605, an outer reinforcing cylinder 607, a collecting hopper 608, a second roughening cylinder 609, an inner reinforcing cylinder 611 and spokes 612 , The first rough stripping cylinder 605 is set to rotate in the machine body 2, the first rough stripping cylinder 605 is provided with a through hole 606 on the cylinder wall, and both ends of the first rough stripping cylinder 605 are in fixed communication with the outer reinforcing cylinder 607, and the collecting hopper 608 is fixedly arranged at the bottom of the first coarse stripping cylinder 605, and the discharge port thereon communicates with the feed port on the medium fine stripping device 602, and the inner reinforcement cylinder 611 is fixed in the outer reinforcement cylinder 607 through spokes 612. The inner reinforcing cylinder 607 is in fixed communication with the second coarse stripping cylinder 609. The wall of the second coarse stripping cylinder 609 is provided with a feed slot 610, and the discharge port on the second coarse stripping cylinder 609 is connected to the first coarse The material outlets on the stripping cylinder 605 are all in communication with the material inlets on the belt stripping device 603. When the media processing system 6 is connected to the waste discharge system 5, the material inlets on the second coarse stripping cylinder 609 are all Communicating with the discharge port on the first star-shaped discharge valve 521 and the discharge port on the second star-shaped discharge valve 522, when the medium processing system 6 is connected to the coal discharge system 4, the second coarse discharge The feed port on the cylinder 609 is in communication with the discharge port on the coal discharge channel 403. During operation, the mixture material of the medium and coal or the mixture material of the medium and gangue first enters the second coarse removal from the end of the second rough removal cylinder 609 In the cylinder 609, due to the driving of the second star-shaped discharge valve 522, the second coarse stripping cylinder 609 rotates synchronously with the first coarse stripping cylinder 605, the medium and the smaller gangue during the continuous rotation of the second coarse stripping cylinder 609 Or coal lump from the feed slot 610 into the first coarse decanter 605, and then the medium from the through hole 606 into the hopper 608, coal or gangue from the other end of the second coarse decanter 609 and the first The one end of the rough stripping cylinder 605 is discharged to the next process, the overall structure can effectively avoid the stuck problem at the feed hole 606 or the feed slit 610, the amount of removal medium is good and the efficiency is high, further, the belt disengagement device 603 The base 622, the second fixed shaft 623, the second bearing 625, the arc-shaped magnetic ring 6 are disengaged by the belt 26. The driving wheel 624, the driven wheel 627, the conveyor belt 628, the second transfer cylinder 629, and the fourth motor 630 are formed. The belt disengagement base 622 is fixedly disposed in the machine body 2, and the second fixed shaft 623 is fixedly disposed at On the belt disengagement base 622, the driving wheel 624 is rotatably disposed on the second fixed shaft 623 through a second bearing 625, the arc-shaped magnetic ring 626 is fixedly disposed on the second fixed shaft 623, and is connected to the driving wheel 624 The inner wall has a certain gap, the driven wheel 627 is rotatably provided on the belt disengagement base 622, the driving wheel 624 and the driven wheel 627 are driven by a conveyor belt 628, and the second transfer cylinder 629 is fixedly disposed on the belt disengagement base 622, and it is located directly under the end of the arc-shaped magnetic ring 626, the discharge port on the second transfer cylinder 629 communicates with the media compartment 604, the fourth motor 630 is drivingly connected with the driving wheel 624, further The body 2 is fixedly provided with a media delivery pump 631, the feed end of the media delivery pump 631 communicates with the media bin 604, and the discharge port thereon communicates with the sorting chamber 301, the sorting chamber A material level sensor 632 is fixedly arranged in the 301. The medium delivery pump 631 is used in conjunction with the material level sensor 632. During operation, the fourth motor 630 drives the first transmission wheel 624 to rotate, and the conveyor belt 628 and the second transmission wheel 627 rotate with it. Thereby, the conveyance of the material is formed. When the material is moved to the arc-shaped magnetic ring 626 by the conveyor belt 628, the medium is adsorbed on the conveyor belt 628 because the medium contains a large amount of iron elements, and coal, gangue and other materials are transmitted to the whole When it is external, it is discharged. At this time, the medium still follows the conveyor belt 628. When the medium is away from the arc-shaped magnetic ring 626, it will fall into the second transfer cylinder 629 by itself, and the gangue or coal lumps will be further removed during the transfer process. To increase the reuse rate of the media.

For overall better automation control, further, the electronic control system 7 is composed of a control room 701 and a control host 702, the control host 702 is used to receive various sensor signals and send action commands to various electrical components, the control host 702 Fixedly installed in the control room 701, the control host 702 is electrically connected to the sorting system 3, coal discharge system 4, gangue discharge system 5, media processing system 6, dust removal system 8 and auxiliary system 9, respectively.

In order to avoid a lot of dust in the machine body 2, further, the dust removal system 8 is composed of a dust collector 801 and a dust removal pipe, the dust suction port on the dust collector 801 communicates with the dust outlet on the dust removal pipe, and the dust removal pipe The dust outlet on the upper part communicates with the inside of the body 2. The dust collector 801 sucks out the air with dust in the body 2 and filters it to avoid the damage of the dust to the components in the body 2 and the damage to the surrounding environment.

In order to ensure the effective conveyance of the material, further, the auxiliary system 9 is composed of a plurality of belt conveyors 901, which are respectively connected to the material outlet on the belt disengagement device 603 and the material inlet on the sorting chamber 301 Use fit.

Claims (22)

1. An air dry sand coal preparation system, which is characterized by including a machine body (2), a separation system (3), a coal discharge system (4), a waste discharge system (5), a media processing system (6), and an electronic control system (7), dust removal system (8), auxiliary system (9), the sorting system (3), coal discharge system (4), waste discharge system (5), media processing system (6) are located in the body (2 ), The coal discharge system (4) and the gangue system (5) are used in conjunction with the coal block layer and the gangue layer on the separation system (3), and the discharge port on the coal discharge system (4) It is respectively connected with the discharge port on the waste disposal system (5) to the feed port on the medium processing system (6), and the discharge port on the medium processing system (6) is connected to the feed on the sorting system (3) The electrical control system (7) is separated from the sorting system (3), coal discharge system (4), waste disposal system (5), media processing system (6), dust removal system (8) and auxiliary system (9) ) Electrical connection, the dust removal port of the dust removal system (8) communicates with the machine body (2), and the discharge port on the auxiliary system (9) is connected to the feed port on the sorting system (3).
2. The air dry sand coal preparation system according to claim 1, characterized in that the separation system (3) is composed of a separation chamber (301), an air chamber (302), a first buffer chamber (305), a first Two buffer chambers (306) and Roots blowers (307), the bottom of the sorting chamber (301) communicates with the air inlet on the gas chamber (302), and a gas distribution plate (303) is fixed at the communication place, A heating net (304) for heating the air in the air chamber (302) is fixed in the air chamber (302), and the air inlet on the air chamber (302) communicates with the air outlet on the first buffer chamber (305) , The air inlet on the first buffer chamber (305) communicates with the air outlet on the second buffer chamber (306), the air inlet on the second buffer chamber (306) and the Roots blower (307) The air outlet on the top is connected.
3. The air dry sand coal preparation system according to claim 2, characterized in that the gas distribution plate (303) is composed of a plurality of fixing plates (308) and a plurality of elastic breathable plates (309), the fixing plates (308) is fixedly connected with the elastic air-permeable plate (309), and is arranged at intervals therebetween, the elastic air-permeable plate (309) is integrally formed with several vent holes.
4. The air dry sand coal preparation system according to claim 2, characterized in that: a gas flow meter (311) and a flow regulating valve are connected to the connection between the first buffer chamber (305) and the second buffer chamber (306) (312).
5. The air dry sand coal preparation system according to claim 2, characterized in that the coal discharge system (4) is driven by a rotating shaft (401), a coal discharge screen (402), a coal discharge channel (403) and a motor The structure of the device is that the rotating shaft (401) is rotatably provided at the upper end of the sorting chamber (301), one end of the rotating shaft (401) is drivingly connected to a motor drive device, and the coal discharge screen (402) is composed of several rows A coal rod (404), the coal discharge rod (404) is evenly distributed on the outer end surface of the rotating shaft (401), the feed port on the coal discharge channel (403) communicates with the sorting chamber (301), and It cooperates with the coal discharge screen (402).
6. The air dry sand coal preparation system according to claim 5, characterized in that: the motor driving device includes a first motor (405) and a speed reducer in drive connection with the first motor (405), the speed reducer and The rotating shaft (401) is drive connected.
7. The air dry sand coal preparation system according to claim 2, characterized in that the gangue discharge system (5) includes a gangue screening device (501), a gangue pushing device (502), and a first gangue negative pressure device ( 503), gangue suction device (504), gangue crushing device (505) and second gangue negative pressure device (506), gangue screening device (501) and gangue pushing device (502), gangue pushing device (502) ) Used with the first gangue negative pressure device (503), gangue pushing device (502) and gangue suction device (504), gangue suction device (504) and gangue crushing device (505), second The gangue negative pressure device (506) cooperates with the gangue suction device (504).
8. The air dry sand coal preparation system according to claim 7, characterized in that the gangue screening device (501) is composed of a bottom screen layer (507) and a side screen layer (508), and the bottom screen layer (508) 507) fixedly arranged in the sorting chamber (301), one end of the side sieve layer (508) is fixedly connected to the inner wall of the sorting chamber (301), and the other end is fixedly connected to the bottom sieve layer (507), so There is a certain inclination between the side screen layer (508) and the bottom screen layer (507), the bottom screen layer (507) and the side screen layer (508) are composed of screen bars (509), adjacent screen bars (509) There is a certain gap between the blanking screen.
9. The air dry sand coal preparation system according to claim 8, characterized in that the gangue pushing device (502) is composed of a moving base (510), a top rod (511) and a return rod (512), and the The top rod (511) and the return rod (512) are respectively fixed on both sides of the bottom of the sorting room (301), the mobile base (510) is slidably arranged in the sorting room (301), and the mobile base (510) The upper rotation is provided with a rotating rod (513), and the rotating rod (513) is fixedly connected with a linkage plate (514), and the linkage plate (514) is used in cooperation with the top rod (511) and the return rod (512) respectively , And the linkage plate (514) is forced to rotate the rotating rod (513), and the rotating rod (513) is fixedly connected with a row of gangue claws (515), the ends of the row of gangue claws (515) are exposed on the bottom screen The upper part of the layer (507).
10. The air dry sand coal preparation system according to claim 7, characterized in that the first gangue negative pressure device (503) is composed of a first negative pressure chamber (516), a first double gate (517), and a partition (518) The first star-shaped discharge valve (521), the second star-shaped discharge valve (522), the string screen (523) and the first induced draft fan (524), the first negative pressure chamber (516) The upper feed port communicates with the sorting chamber (301) and its communication position is located at the end of the bottom sieve layer (507) side. The first negative pressure chamber (516) and sorting chamber (301) are provided with a first Double gates (517), the partition plate (518) is fixedly arranged in the first negative pressure chamber (516), and it forms a waste discharge chamber (519) and a discharge medium chamber (516) in the first negative pressure chamber (516) 520), the discharge port on the discharge chamber (519) communicates with the feed port on the first star-shaped discharge valve (521), and the discharge port on the discharge chamber (520) communicates with the second The feed port on the star-shaped discharge valve (522) communicates, the string screen (523) is fixedly arranged on the top of the discharge chamber (520), and the feed port on the string screen (523) is connected to the first The outlet of the double gate (517) is connected, and the other end is fixedly connected to the top of the partition (518). The air inlet on the first induced draft fan (524) is in communication with the first negative pressure chamber (516), and The first magnetic filter sieve (525) is arranged at the connection between them.
11. The air dry sand coal preparation system according to claim 10, characterized in that the gangue suction device (504) is composed of a suction tube (526), a feeding tube (528) and a moving device, the suction The tube (526) is located at the bottom of the sorting chamber (301) and is fixed on the moving base (510), and a suction hole (527) is opened at the bottom thereof, the feed port and the suction tube on the feed tube (528) The discharge port on (526) communicates with the discharge port on the second gangue negative pressure device (506), and the feed pipe (528) is connected to the mobile device Move back and forth under control.
12. The air dry sand coal preparation system according to claim 11, characterized in that the moving device includes a second motor (529), a ball screw (530) and a connecting seat (531), and the ball screw ( 530) is connected to the second motor (529), one end of the connection seat (531) is connected to the ball screw (530), and the other end is connected to the feed pipe (528).
13. The air dry sand coal preparation system according to claim 11, characterized in that the gangue crushing device (505) is composed of a rotating rod (532), a first crushing rod (535) and a rack (534), The rotating rod (532) is located in the suction tube (526) and rotates freely in the suction tube (526), the rack (534) is fixedly arranged at the bottom of the sorting chamber (301), and the rotating rod (532) 532) both ends of the rack gear (534) are driven to mesh with each other, the first gravel rod (535) is evenly distributed on the outer end surface of the rotating rod (532), and the suction pipe (526) is fixedly provided with an inner wall on the inner wall Two crushed stone rods (536), the second crushed stone rods (536) interlace with the first crushed stone rods (535).
14. The air dry sand coal preparation system according to claim 11, characterized in that the second gangue negative pressure device (506) is composed of a second negative pressure chamber (537), a second double gate (539), and a third A star-shaped discharge valve (540), a hose (538) and a second induced draft fan (541), the feed port on the second negative pressure chamber (537) and the outlet on the second double gate (539) The feed port communicates, the feed port on the second double gate (539) communicates with the discharge port on the hose (538), the feed port on the hose (538) and the feed pipe (528) The discharge port of the third star-shaped discharge valve (540) communicates with the second negative pressure chamber (537), and the discharge port on the third star discharge valve (540) communicates with the medium processing system (6). The feed inlet is in communication, the second induced draft fan (541) is in communication with the second negative pressure chamber (537), and a second magnetic filter screen (542) is provided in the communication between them.
15. The air dry sand coal preparation system according to claim 7, characterized in that the medium processing system (6) is composed of a medium coarse decoupling device (601), a medium fine decoupling device (602), and a belt decoupling device (603) ) And a media silo (604), the media silo (604) is fixed at the bottom of the machine body (2), a media processing system (6) connected to the coal discharge system (4), and a media roughening device (601) therein Used in conjunction with the coal discharge system (4), the media processing system (6) connected to the gangue system (5), the medium roughing device (601) in it is used in conjunction with the gangue system (5), the medium is coarse The discharge port on the stripping device (601) communicates with the feed port on the medium fine stripping device (602), and the discharge port on the medium fine stripping device (602) is connected to the feed port on the belt stripping device (603) The material port is connected, and the material outlet on the belt disengagement device (603) communicates with the material inlet on the media silo (604), and the material outlet on the media silo (604) is connected to the sorting system (3) The feed port on the top is connected.
16. An air dry sand coal preparation system according to claim 15, characterized in that the medium coarse decoupling device (601) is composed of a first coarse decanter (605), an outer reinforcing cylinder (607), and a hopper (608) , A second coarse stripping cylinder (609), an inner reinforcing cylinder (611) and a spoke (612), the first coarse stripping cylinder (605) is rotatably arranged in the body (2), the first coarse stripping cylinder ( 605) A feed hole (606) is opened on the wall of the barrel, and both ends of the barrel are fixedly connected with the outer reinforcement barrel (607). The collecting hopper (608) is fixedly arranged at the bottom of the first rough barrel (605), and The discharge port on the upper part is in communication with the feed port on the medium decoupling device (602), and the inner reinforcing cylinder (611) is fixed in the outer reinforcing cylinder (607) through spokes (612), and the inner reinforcing cylinder (607) It is in fixed communication with the second coarse stripping cylinder (609), the second coarse stripping cylinder (609) is provided with a feed slot (610) on the cylinder wall, and the discharge port on the second coarse stripping cylinder (609) The discharge ports on the first rough stripping cylinder (605) are in communication with the feed ports on the belt stripping device (603). When the media processing system (6) is connected to the waste discharge system (5), the The feed port on the second coarse stripping cylinder (609) is in communication with the discharge port on the first star-shaped discharge valve (521) and the discharge port on the second star-shaped discharge valve (522). When the medium processing system (6) is connected to the coal discharge system (4), the feed port on the second rough stripping cylinder (609) is in communication with the discharge port on the coal discharge channel (403).
17. The air dry sand coal preparation system according to claim 16, characterized in that: the medium fine removal device (602) is composed of a fine removal base (613), a first fixed shaft (614), a drum (615), A bearing (616), a circular arc frame (617), a first transfer cylinder (620), a discharge cylinder (619) and a third motor (621), the fine detachment base (613) is fixedly installed in the body ( 2), the first fixed shaft (614) is fixedly arranged on the fine disengagement base (613), the roller (615) is rotatably arranged on the first fixed shaft (614) through the first bearing (616), and It is located directly under the collecting hopper (608), the arc frame (617) is fixed on the first fixed axis (614), and a number of permanent magnet blocks (618) are fixedly arranged on it, and the adjacent permanent magnet blocks (618) 618) The magnetic force at the outer surface of the drum (615) is different, and the discharge cylinder (619) is fixedly arranged on the fine stripping base (613), and it is on the same side as the arc frame (617), the discharge cylinder The discharge port on (619) is in communication with the feed port on the belt disengagement device (603), the first transfer barrel (620) is fixedly arranged on the fine stripping base (613), and it is located on the arc frame Directly below the end of (617), the discharge port on the first transfer barrel (620) communicates with the media bin (604), and the third motor (621) is in drive connection with the drum (615).
18. The air dry sand coal preparation system according to claim 17, characterized in that: the belt disengagement device (603) is composed of a belt disengagement base (622), a second fixed shaft (623), and a second bearing (625) ), An arc-shaped magnetic ring (626), a driving wheel (624), a driven wheel (627), a conveyor belt (628), a second transfer cylinder (629) and a fourth motor (630), the belt disengages the base (622) fixedly arranged in the machine body (2), the second fixed shaft (623) is fixedly arranged on the belt disengagement base (622), and the driving wheel (624) is rotatably arranged through the second bearing (625) On the second fixed shaft (623), the arc-shaped magnetic ring (626) is fixedly arranged on the second fixed shaft (623), and it has a certain gap with the inner wall of the driving wheel (624), and the driven wheel (627) ) Rotatingly arranged on the belt disengagement base (622), the driving wheel (624) and the driven wheel (627) are driven by a conveyor belt (628), and the second transfer cylinder (629) is fixedly arranged on the belt disengagement base (622), and it is located directly under the end of the arc-shaped magnetic ring (626), the discharge port on the second transfer cylinder (629) communicates with the media silo (604), and the fourth motor (630) ) Drive connected with driving wheel (624).
19. The air dry sand coal preparation system according to claim 2, characterized in that: a medium conveying pump (631) is fixedly arranged in the body (2), and the feed end on the medium conveying pump (631) is The media bin (604) is in communication, and the discharge port thereon is connected to the sorting chamber (301). A material level sensor (632) is fixedly arranged in the sorting chamber (301), and the medium delivery pump (631) is connected to the material The position sensor (632) is used in cooperation.
20. The air dry sand coal preparation system according to claim 1, characterized in that the electric control system (7) is composed of a control room (701) and a control host (702), and the control host (702) is fixedly set In the control room (701), the control host (702) is separated from the sorting system (3), coal discharge system (4), waste discharge system (5), media processing system (6), dust removal system (8) And the auxiliary system (9) are electrically connected.
21. The air dry sand coal preparation system according to claim 1, characterized in that the dust removal system (8) is composed of a dust collector (801) and a dust removal pipe, and the dust suction port on the dust collector (801) is The dust outlet on the dust removal pipe communicates, and the dust outlet on the dust removal pipe communicates with the inside of the machine body (2).
22. The air dry sand coal preparation system according to claim 2, characterized in that the auxiliary system (9) is composed of several belt conveyors (901), and the belt conveyors (901) are separated from the belt disengagement device ( The discharge port on 603) and the feed port on the sorting chamber (301) are used together.

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