SU1599135A1 - Grain air separator - Google Patents

Abstract

The invention relates to grain cleaning devices incorporated into pneumatic conveying installations and combining the functions of a discharger and an air separator, and can be used in the grain cleaning department of mills and large factories equipped with pneumatic conveying installations. The purpose of the invention is to improve the quality of cleaning grain from impurities. The pneumatic separator includes a housing 1, a pneumatic separating channel 2 connected to the upper part with a sedimentary chamber 3, a recirculation channel 4 connecting the chamber 3 to the lower part of channel 2, a bypass channel 14 communicated from the lower part to channel 2, and the upper part to the feed unit 5 grain into the middle part of channel 2. Node 5 consists of an inlet nozzle 6 and a receiving hopper 7. In the upper part of chamber 3, a diametrical fan 8 is installed. In the lower part of case 1 there are hoppers 9, 10 for outputting the cleaned grain and impurities with lock gates 11 and 12. With a camera 3 communicates a nozzle 13 for discharging a conveying air flow. In the place of communication of channels 2, 4 and 14 with a possibility of horizontal movement, a guide element 15 is installed, made in the form of two curved plates interconnected in the upper part of the curvilinear plates. In the chamber 3 there is a guide wall 16 with a rotatable top section 17. The upper edge of the section 17 of the wall 16 is located at the horizontal axis of the impeller of the fan 8. In the upper part of the node 5 there is a curved plate 18. In the middle part of the channel 4 there is a throttle valve 19 The crude grain from node 5 enters channel 2, into which air flows from channels 14 and 4. The cleaned grain falls out of channel 2 into the hopper 9. Impurities are deposited in chamber 3 and discharged through the hopper 10. 2C. f-ly, 1 ill.

Description

f

(21) 4456378 / 31-03

(22) 07.07.88

(46). 15. 10.90. Bul Number 38

(71) Moscow Technological Institute of Food Industry

(72) V.V.Gortinsky, V.F.Vedenyev, V.I., Hasanov, L.N.Shkolnikov

and M, Yu.Avdeev

(53) 631.362.36 (088.8) (56) Sokolov A.Ya. Technological equipment of enterprises for the storage and processing of grain. M .: Kolos, 1975, p. 86 ..

USSR author's certificate number 1348000, cl. B 07 B 4/02, 1985.

(54) GRAIN PNEUMATOR

(57) The invention relates to grain cleaning devices, embedded 1 m into pneumatic conveying installations and combining functions of a discharger and an air separator, and m. used in the grain cleaning department of mills and large factories equipped with pneumatic conveying installations. The purpose of the invention is to improve the quality of grain cleaning from impurities. - The pneumatic separator comprises a housing 1, a pneumatic separating channel 2, communicated by the upper part with a sedimentary chamber 3, a recirculation channel 4, with

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with so

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communicating chamber 3 with the lower part of channel 2, bypass channel 14, which is connected to the lower part with channel 2, and the upper part to the grain supply unit 5 in the middle part of channel 2, Node 5 consists of an inlet 6 and an open-air hopper 7 V. Part 3 of the chamber is equipped with a diameter 8c fan. In the lower part of the pac-jQ housing 1 there are bunkers 9 and 10 dp of outputting the cleaned grain and impurities with isyuch closures 11 and 12, a branch pipe 13 is connected with chamber 3 CO-J5 communication channels 2, 4 and 14 with the ability to move along horizontally, a guide element 15 is installed, embodied in the form of two conjugate to each other in

20

The invention relates to grain cleaning devices that are embedded in pneumatic conveying installations and combining the functions of a discharger and an air separator, and can be used in the grain cleaning department of mills and large plants.

equipped with pneumatic conveying installations. ,

The purpose of the invention is to improve the quality of cleaning grain from impurities.

The drawing schematically shows the proposed pneumoseptic,

The pneumatic separator includes a housing 1, a pneumatic separating channel 2, an upper part with a sedimentary chamber 3, a recirculation channel 4, a communicating chamber 3 with the lower part of channel 2, a node 5 for feeding grain to the middle part of the channel 2. pipe 6 and receiving hopper. 7, a diametral fan B installed in the upper part of chamber 3, bunkers for outputting cleaned grain 9 and impurities 10 with sluice gates 11 and 12 located in the lower part of housing 1, a nipple 13 for outputting a conveying air flow reported with camera 3, and the bypass channel 14, which is connected to the lower part with channel 2, and the upper part with node 5. Directional unit 15 is installed in the place of communication of channels 2, 4 and 14 with the possibility of horizontal movement and is made as two conjugate to each other in the upper hour of the upper part of the linear plates. In the chamber 3 there is a guide wall 16 with a rotatable top section 17. The upper edge of the section 17 of the wall 16 is located at the level of the horizontal axis of the impeller of the fan 8, In the upper part of the node 5 there is a curved plate 18. In the middle part of the channel 4 there is a throttle valve 19, Uncleaned grain from node 5 enters channel 2, into which air flows from channels G4 and 4, Purified grain drops out from channel 2 to bunker 9, Impurities are deposited in chamber 3 and discharged through bin 10. 2 hp ff, 1 ill.

.ti curved plates. The guide wall 16 with a rotatable top section 17 is located in the chamber 3, while the upper edge of the section 17 of the wall 16 is located at the horizontal axis of the impeller of the fan 8. The curvilinear plate 18 is installed in the upper part of the node 5, Throttle valve 19 is located in the middle part channel 4; In the lower part of the assembly 5, a cargo valve 20 and a sloping plane 21 are installed; the chamber 3 has an internal 22, an average 23 and an external 24 wall. The guide wall 16 with the wall 22 forms a channel 25.

Pneumatic works as follows.

Crude grain, such as wheat, mixed with air through the inlet 6 enters the receiving bin 7, where in its upper part the air separates from the grain and goes through the bypass channel 14 to the pneumocephalous channel 2, and the grain goes from the receiving bin 7 through the cargo the valve 20 also enters the pneumatic separating channel 2o. In the receiving bin 7, a portion of air circulates around the curvilinear plate 18, thus reducing the flow turbulence, increasing the effect of the primary extraction of grain and impurities from the transport air flow and consequently reducing the entrainment of impurities in the flow channel 14, in turn, reduces za5

soiliness already cleaned grain, you-

falling from pneumocephalic canal 2.

From the recirculation channel 4, an additional amount of air flows into the pneumatic separator channel 2, which is removed from the sediment chamber 3 by the screw 8, and is combined with the transport air flow nocf from the bypass channel 14. Combined flow providing the required # 1 specific air flow for pneumatic separation, 500-900, releases aerodynamic light impurities from the grain and carries them into the sediment chamber 3. The cleaned grain falls out of pneumo-separating channel 2 and is discharged from the pneumatic separator through a bunker 9 11. Impurities are precipitated by gravitational and centrifugal forces in the sedimentary chamber 3.

The air flow is divided into two parts by a guide wall 1.6. One circulating pump is sucked in by the diametral fan 8 and flows through the recirculation channel 4 again into the pneumo-separator canap 2, thus its cycle. Another part of the air, concentrating most of the impurities in itself, is released from them when the conveying air flow is rotated 180 in the lower part of the sediment chamber 3. Next, the transporting air flow freed from impurities is removed from the pneumo-separator through nozzle 13. The impurities are removed from the pneumo-separator bunker 10 with airlock 12.

The regulation of the circulating air quantity, and, consequently, the air velocity in the pneumo-separating channel, is carried out by means of a throttle valve 19.

Moving horizontally through the guide element 15 The formation of the most uniform air flow in the pneumatic separating channel is carried out, which also contributes to an increase in the efficiency of the emission of impurities.

By turning the upper portion 17 of the guide wall 16, the impurities are deposited in the sediment chamber 3, and, consequently, the probability of entrainment of some impurities with recirculating air is reduced, which eliminates the re-clogging of the already cleaned grain.

135 6

when it falls out of the pneumovascular channel.

The bypass channel is designed to supply transporting air, separated from the grain in the receiving core, to the pneumatic cannon. OoBbmieHne cleaning efficiency, grain a is achieved by increasing the specific air flow in the pneumatic separating channel by adding to the transporting air stream the flow circulating inside the separator, forming a more uniform field of air flow speeds in the pneumatic channel, reducing the turbulence of the air flow in the receiving bin and therefore reducing the ash from it impurities along the bypass channel, regulating the amount of circulating air, the most efficient deposition of impurities in the sedimentary and reduce the likelihood of entrainment of part of the air with recirculated air.

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five

Claims (1)

1. Grain pneumatic separator, include a housing, a pneumatic separator, connected with the upper part with a sedimentary chamber, a recirculation channel that connects the sedimentary chamber with the lower part of the pneumatic separating channel, a grain supply unit to the middle of the pneumatic separator, a diametrical fan installed in the upper part of the sedimentary chamber, bunkers with sluice gates for the output of purified grain and impurities, located in the lower part of the body, and a branch pipe dp of the output of the transporting air flow communicated with the wasp The chamber is characterized by the fact that, in order to improve the quality of grain cleaning from impurities, it is equipped with a bypass channel, communicated by the lower part with a pneumo-steaming canap, and the upper part - with a grain supply unit into the middle of the pneumo-steaming channel, a guiding element installed in the place of communication of pneumo-separating, recirculation and bypass canapes with the possibility of moving horizontally and made in the form of two Curvilinear plates interconnected in the upper part of the curvilinear plates, and a wall with a rotatable upper section - ICOM located in sedimentary chamber 7 15991358 At the same time, the upper edge of the rotating grain section in the upper part of the node of the fed upper section of the grain guide to the middle part of the pneumatic grating is located at the level of the horizontal channel. talnoe axis of the impeller diameter - g Pneumatic separator according to claim 1, about the rotary fan to the torus. l and h and n and so that it is supplied 2. The pneumatic separator according to item Ij of this is a throttling valve, which is characterized by the fact that in the middle part of the recirculation is equipped with a curvilinear plate of the us-channel.