Description:
Grain cleaning separators BLS are designed to separate impurities from wheat grain that differ from it in width, thickness and aerodynamic properties. A grain-cleaning separator of this type is a mill, for final, secondary grain cleaning, it is installed and operated in the grain-preparation departments of mills.
Grain cleaning separators BLS are produced with complete horizontal cyclones with anti-suction valves or sluice gates.
Technological process of the BLS grain cleaning separator.
The technological process is carried out as follows.
The grain to be cleaned by gravity in one or two parallel flows enters the distributors installed on the receiving (viewing) nozzles.
The distributors, in turn, form two grain streams directed to each section of the screen body of the grain cleaning separator.
Further description technological process given for one body section, one pneumatic separation channel and one horizontal cyclone.
Grain separators A1-BLS-12, A1-BLS-16, A1-BLS-100 are designed to separate impurities from wheat grain that differ in width, thickness and aerodynamic properties using sieves and air flow. A1-BLS-12, A1-BLS-16, A1-BLS-100, separator A1-BLS-12, separator BLS-12, separator A1-BLS-16, separator BLS-16, separator A1-BLS-100, separator BLS-100, BLS-12, BLS-16, BLS-100, grain-cleaning separator, grain-cleaning, separator, The grain mixture from the inlet pipe goes to the distributor bottom, on which it is distributed evenly over the width of the sorting sieve.
The apron reduces the possibility of grain entering the waste. Large impurities (coming off the sorting sieves) are removed from the separator by a tray, and the mixture of grain with small impurities passes through the sorting sieve to the undersowing sieve. Small impurities (passage of the under-sowing sieve) along the bottom of the body are sent to the chute and removed from the separator.
The grain cleaned on sieves from large and small impurities enters the receiving box of the pneumatic separation channel and to the vibrating chute. The height of the grain level in the receiving box can be adjusted by means of springs. The presence of grain backing in the receiving box contributes to a more even distribution of grain along the width of the pneumatic separation channel and prevents air leaks in this zone. Under the action of the force of the weight of the grain, a gap is formed between the vibrating tray and the wall of the receiving box, through which the grain enters the zone of action of the air flow. Air intake into the pneumatic separation zone is carried out mainly from under the vibrating chute.
When air passes through the grain flow, light impurities are released from the grain mass and carried out by air through the channel and air ducts into the sedimentation device (horizontal cyclone, filter).
The clarity of separation in the pneumatic separation channel is regulated by setting the position of the movable wall using the handle. The air flow is regulated by turning the throttle valve with the handle.
The cleaned grain from the pneumatic separation channel through the branch pipe is fed by gravity to further processing.
In order to reduce the emission of dust in the room, nozzles are installed on the sieve body in the grain exit zone, which are connected to the aspiration system of the mill enterprise with the help of fabric sleeves and nozzles of the bed.
The principle of operation of the horizontal cyclone is based on the use of the inertial force of the aspiration rails from the pneumatic separation channel of the grain cleaning separator, moving in the air flow inside the cyclone.
Specifications
| Specifications | A1-BLS-12 | A1-BLS-16 | A1-BLS-100 |
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| Productivity, t / h | 12 | 16 | 100 |
| Cleaning efficiency,% | 80 | 75 | 40 |
| Installed power, kW | 1,3 | 1,5 | 1,5 |
| Sieve body vibration frequency, vibrations / min | 325 | 325 | 360 |
| Sieve body vibration radius, mm | 9 ± 2 | 9 ± 2 | 9 ± 2 |
| Air consumption for aspiration and pneumatic separation, m3 / hour | 4500 | 8000 | 8500 |
| Completeness | |||
| pneumatic channel | 1 | 2 | 2 |
| horizontal cyclone | 1 | 2 | - |
| dimensions, mm: (LxWxH) | 2600x1365x1510 | 2090x2520x1510 | 2600x2520x1510 |
| Weight, kg | 1020 | 1450 | 1600 |
Drawing
Drawing
Grain separators A1-BLS-12, A1-BLS-16, A1-BLS-100, grain separator A1-BLS-12, grain separator A1-BLS-16, grain separator A1-BLS-100, separator A1-BLS-16 , separator A1-BLS-12, separator A1-BLS-100, separator BLS-100, separator BLS-12, separator BLS-16, separator BLS-100.
Specifications:
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Installed power, kW |
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Weight, kg |
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Overall dimensions, mm |
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Sieve frames in a tier, pcs |
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The total number of sieve frames, pcs |
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Sieve size, mm |
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Sieve area, m2 |
Separator A1-BIS-100
Specifications:
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Nominal productivity for 1 hour of main time on wheat in kind source material up to 760 g / l, not less: t / h Pre-cleaning at a moisture content of 15% with a trash impurity content of up to 3%, including straw impurities up to 1% |
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Efficiency of cleaning from separable trash admixture not less than:% |
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Installed power, kW |
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Weight, kg With a set of working bodies and accessories for performing the main technological operation With a full set of interchangeable working bodies and accessories |
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Overall dimensions, mm |
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height (excluding the pneumatic separation channel) |
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The frequency of circular vibrations of the sieve section, s |
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Radius of circular vibrations of the sieve part, mm |
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Sieve frames in a tier, pcs |
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The total number of sieve frames, pcs |
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Sieve size, mm |
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Sieve area, m2 |
Separator assembly
Separatorstype A1-BLS and A1-BIS intended for primary cleaning wheat grain (and other crops) from impurities that differ in width, thickness and aerodynamic properties using sieves and air flow.
Separators for primary cleaning of grain are used in grain preparation departments and at elevators of flour mills, including as part of complete equipment for newly built mills.
The separator consists of a closed sieve body suspended from the frame on elastic suspensions and a pneumatic separation channel block.
The sieve body consists of a frame in which retractable sieve frames are installed. In the separator, each tier consists of two sieve frames, which are connected when they are installed in the body using hook devices, consisting of corners and strips. The sieve frames are divided into cells by longitudinal and transverse bars, each cell contains two rubber balls designed to clean the sieves from stuck particles. Mesh Fordons are attached to the lower planes of the grid frames. The mesh frames, fitted in sections, are inserted between the body sidewalls along the guide corners.
When the sieve frames are released, the clamps move approximately 4-6 mm away from the sieves, which results in a simple and reliable dismantling of the sieve frames. Nozzles are installed on the front link of the bed. Cloth sleeves are put on the branch pipes of the bed and the sieve body.
In the area of the exit from the sieve body of the refined grain, there are aspiration pipes connected to the bed pipes with fabric sleeves.
Trays are used to remove large and small impurities.
Separators A1-BLS
Grain separators of the A1-BLS type are classified as air-sieve separators; on the screens of such separators, the grain is cleaned from impurities that differ from it in width and thickness.
Design
Among distinctive features This design of separators can be distinguished by the absence of sedimentation chambers and the combination of the functions of the unbalance and the drive pulley, in aggregate, this greatly reduces the height and provides increased service safety; the presence of an adjustable pneumatic separation channel makes it possible to change the air speed. The circular translational movement in the separator ensures high efficiency of grain cleaning from large and small impurities, and the clamping of the sieve frames with an eccentric mechanism gives good fixation, easy installation and removal of the sieve frames.
Separators of the A1-BLS type differ from the separators of the A1-BIS type mainly in the design of the pneumatic separation channel. The adjustable baffle is made of three-layer glass, it also serves as the outer wall of the channel. In addition, the sieve body of the A1-BLS-12 separator is single-section. The rest of the cars have a two-piece body.
Technological process
The technological process of cleaning grain in separators of the A1-BLS type is carried out as follows: the incoming grain mixture is fed through distributors and inlet pipes separately to each section.
Large impurities of grain are removed through a separate tray, and grain with small impurities passes through the sorting sieve and enters the under-sowing sieve. Small impurities are also removed from the separator through the tray. The grain cleaned on sieves enters the vibrating channel of the pneumatic separation channel, and then into the channel itself, where light impurities are removed from the grain mixture by an ascending air flow. The cleaned grain from the pneumatic separation channel goes for further processing.
Specifications:
| Parameters | A1-BLS-12 | A1-BLS-100 |
| Productivity, t / h | 12 | 100 |
| Cleaning efficiency,% | 60..80 | 50..60 |
| Installed power, kW | 1,3 | 1,5 |
| Weight, kg | 1020 | 1670 |
| Overall dimensions, mm | 2600x 1365x1510 | 2600x 2520x1510 |
| Sieve body vibration frequency, vibrations / min | 325 | 360 |
| Sieve body vibration radius, mm | 9 ± 2 | 11 ± 2 |
| Air consumption for aspiration and pneumatic separation, m3 / hour | 4500 | 6100 |
| Number of sieve frames per layer | 2 | 2 |
| Number of sections | 1 | 2 |
| Total number of sieve frames | 4 | 8 |
| Sieve size, mm | 750x996 | 750x996 |
| Sieve area, m2 | 3 | 6 |
Separator design.
The separator consists of a closed sieve body 1, suspended from the frame 2 on elastic suspensions 24 and a block of two pneumatic separating channels 22. The sieve body consists of two parallel working sections, in each of which sliding sieve frames 7 are installed in two tiers 7. Separator A1- BIS-100 each tier consists of two lattice frames, which are connected when they are installed in the body with the help of hooks, consisting of corners 37 and strips 36. The lattice frames are divided into cells by longitudinal and transverse bars, each cell has two rubber balls 11 with a diameter 35 mm, designed for cleaning sieves from stuck particles. Mesh Fordons are attached to the lower planes of the grid frames. The mesh frames, fitted in sections, are inserted between the body sidewalls along the guide corners. When the sieve frames are released, the clamps 6 move about 46 mm from the sieves, which ensures a simple and reliable dismantling of the sieve frames. On the front connection of the bed, there are nozzles 4 and inspection nozzles 3. On the nozzles of the bed and the sieve body, cloth sleeves 5 with rubber sealing rings sewn into them are put on. In the area of exit from the sieve body of the refined grain, aspiration pipes 28 are installed, connected to the pipes 30 of the bed by fabric sleeves 29. In order to prevent possible impacts of the body against the bed when starting and stopping the machine, stops 10 with rubber shock-absorbing rings are fixed on the lower links of the bed. Trays 13 and 14 are used to remove large and small impurities. Pneumatic separation channels 22 are designed to separate light impurities from the grain. The separator has two pneumatic separation channels, into each of which grain is supplied from the corresponding section of the sieve body. Grain from the under-sowing sieve enters the feed box 17, from which it is directed to a vibrating channel suspended from the walls of the pneumatic separation channel on rubber suspensions 20 and springs 21 and vibrating in the horizontal plane from the 15 electric vibrator.
The technological process of the separator.
The technological process is carried out as follows. The cleaned grain from gravity flows in two parallel streams into two sections of the sieve body. Both grain streams are divided into two streams by means of two distributors included in the delivery set of the separator, installed on the inlet pipes. Thus, four grain streams are directed to the separator (two to each section of the body). The further description of the technological scheme is given for one section of the body and one pneumatic sealing channel. In the A1-BIS-12 separator, the grain mixture is fed from the inlet to the distributor bottom, on which, with the help of slopes, it is distributed evenly over the width of the sorting sieve. In the A1-BIS-100 separator from the inlet, the grain mixture enters the sorting sieve, on which, using a valve, it is distributed in an even layer over its entire
width. The apron reduces the possibility of grain entering the waste. Large impurities (coming off the sorting sieves) are removed from the separator by a tray, and the mixture of grain with small impurities passes through the sorting sieve to
undersowing sieve. Small impurities (passage of the under-sowing sieve) along the bottom of the body are sent to the chute and removed from the separator. The grain cleaned on sieves from large and small impurities enters the feed box of the pneumatic separation channel and to the vibrating chute. The height of the grain level in the feed box can be adjusted by means of springs. The presence of grain backing in the feed box contributes to a more even distribution of grain along the width of the pneumatic separation channel and prevents air leaks in this zone. Under the influence of the grain mass,
the gap between the vibrating tray and the wall of the feeding box, through which the grain enters the zone of action of the air flow.
Air supply to the pneumatic separation zone is carried out mainly under the vibrating tray. For the A1-BIS-12 separator, part of the air enters the duct through louvers in the rear wall, preventing dust from settling inside the duct. When air passes through the grain flow, light impurities are released from the grain mass and carried out by air through a channel into a sedimentation device (horizontal cyclone, filter, etc.). The clarity of separation in the pneumatic separation channel is regulated by setting the position of the movable wall using the handles. The air flow is regulated by turning the throttle valve with the handle. The cleaned grain from the pneumatic separation channel through the hole in the floor of the room is fed by gravity for further processing. In order to reduce the emission of dust into the room, nozzles are installed on the sieve body in the grain exit zone, which, using fabric sleeves and nozzles
the beds are connected to the mill's aspiration system.
SEPARATORS OF TYPES A1-BIS AND A1-BLS
Separators of the A1-BIS and A1-BLS types are referred to as sieve-air separators, on the sieves of which the grain is cleaned of impurities that differ from it in width and thickness, and in the pneumatic separating channel - by the hovering speed.
Distinctive features of the separator design - the absence of sedimentation chambers and the combination of the unbalance function and the drive pulley, which significantly reduces the height and ensures the safety of service; the presence of an adjustable pneumatic separation channel allows you to change the air speed. The circular translational movement provides a high efficiency of cleaning grain from large and small impurities, and the pressing of the sieve frames with an eccentric mechanism ensures good fixation, easy installation and removal of the sieve frames. Thanks to the illumination of the pneumatic separation channel, it is possible to visually monitor the process of release of light impurities.
Separators type A1-BIS
They consist of a two-section sieve body, suspended from the frame on flexible suspensions, and a vertical pneumatic separation channel. In the case of the A1-BIS-12 separator (Fig. 19) there are retractable frames with 11 sorting and 10 undersowing sieves, fixed by eccentric mechanisms. The sieve frames are divided into cells by longitudinal and transverse bars, each of which has two rubber balls 13 intended for cleaning the sieves. Mesh fordons are attached to the bottom plane of the sieve frame.
An electric motor is installed on the front wall of the screen housing
tel 9, which, by means of a V-belt transmission, drives the pulley 8 with an unbalanced weight into rotation, which provides a circular translational movement of the sieve body. In the upper part of the frame, there is a receiving branch pipe 12 for the supply of initial grain and a branch pipe 14 for connecting to the aspiration network. The cleaned grain comes out through the outlet channel 3. Tray 7 is used to remove large impurities, tray 6 is used for small impurities. On the side of the descending part of the body there is a pneumatic separating channel 2 with a vibrating tray 4 designed to feed grain into the channel.
For the most effective release of light impurities in the pneumatic separation channel, the vibration amplitude of the vibrating tray, the amount of its departure into the channel, the size of the outlet slot and the air flow rate (by the position of the movable wall 1) in the upper and lower parts of the channel, as well as the air flow rate are regulated.
The delivery set of the separator includes a special horizontal cyclone designed for sedimentation of sediments and installed after the separator. The cyclone is a truncated cone 2 (Fig. 20), inside which, on a common horizontal axis, there are two inner cones 3, 4 of smaller dimensions. They are welded together with large bases so that the annular channel formed between the cones first gradually narrows, and then sharply expands, passing into the expansion chamber 5, attached to the larger base of the outer cone 2.
In the inlet part of the cyclone, four curved blades U are welded to ensure swirling of the air flow in the annular channel. From below, a sluice valve 7 or an anti-suction valve is connected to the expansion chamber.
The principle of operation of the separators is as follows (Fig. 21): the cleaned grain flows by gravity into the sieve housing, large impurities (coming off the sorting sieve 3) are removed through the tray 9 from the separator, and the mixture of grain with small impurities passing through the sorting sieve 3 is sent to the under-sowing sieve 4 Fine impurities (undersowing sieve passage) enter the 12 chute and are removed from the separator.
The grain cleaned on sieves from large and small impurities enters the vibrating chute 10 and then into the pneumatic separation channel; When air passes through the grain flow, light impurities are released from the grain mixture and carried out by air through a channel into a horizontal cyclone. The cleaned grain from the pneumatic separation channel goes through a hole in the floor through gravity pipes for further processing.
Rice. 19. Separator A1-BIS-12:
1 - movable wall, 2 - pneumatic separation channel; 3 - outlet channel, 4 - vibrating chute, 5 - vibrator, 6, 7 - trays, 8 - pulley, 9 - electric motor; 10- sowing sieves; 11 sorting sieves, 12 - inlet pipe; 13-rubber ball; 14 - branch pipe for aspiration
Rice. 20. Cyclone separator A1-BIS-12:
1 - curved blade; 2 - truncated cone, 3.4 - cones; 5 - camera; 6 - outlet branch pipe; 7 - airlock
Fig. 21. Technological diagram of separators A1-BIS-12 and A1-BIS-100:
1- inlet pipe; 2- distribution bottom, 3-sorting sieve, 4 - undersowing sieve, 5 - apron, 6 - aspiration branch pipe, 7 - throttle valve, 8 - movable wall, 9 - tray for large impurities; 10 - vibrating chute, 11 - feeding box, 12 - tray for small impurities, I - unrefined grain, II - light impurities, III - refined grain, IV - fine impurities; V - large impurities
