SU1216597A1 - Installation for drying grass - Google Patents

Description

The invention relates to a technique for drying plant mass and can be used in agriculture and other areas where layer drying of fibrous materials is necessary.

The purpose of the invention is to improve the quality of drying.

Fig. 1 shows a plant for drying the grass, a general view; Fig. 2 shows the node I in Fig. 1 (a separator placed in the recirculation channel); in FIG. 3, node II in FIG. 1 (agitator-slide).

The plant for drying the grass contains a sectioned drying chamber 1 with a conveyor 2 and gas distribution manifolds 3 with slotted nozzles, a bypass collector 4 to which the agitators-gates 5 are connected, having a cylindrical body 6 with transverse slots 7, a shaft installed in it with mixing elements 8 and a pipe 9 for connection to the collector 4, in addition, the installation contains fans 10 with heaters 11, exhaust pipes 12, recirculation collectors 13 with separators 14, filled in the form of a hollow flue system 15 b with slit nozzles 16 directed tangentially to the underlying tube, wherein the hollow pipe system installed in the cross section of the recycle reservoir 13 and hopper 17, Dp controlling coolant flow valve 18 are.

The grass dryer works in the following way.

The wet grass mass is loaded onto the moving conveyor 2 and enters the chamber 1, into which the air heated by the calorfers 11 is fed into the fans 10. Air is supplied from the nozzles of the collectors 3 through the purge mesh of the conveyor 2 under the material being processed, heats it and removes moisture through the exhaust pipes 12.

During the drying process, the grass moisture varies in height of the layer, in width and in length of conveyor 2, therefore, along the length of the dryer, chamber 1 is divided into separate drying sections, and agitators-gates 5 are installed at the junction of sections;

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elements 8, made in the form of radial rods. The diameters of the housing 6 of the agitator-paddles 5 is enough to perform 250-300 mm, and

5, the height of their installation above the conveyor 2 must be at least 150 mm. The drive of rotation of the shaft 8 is chosen such that the circumferential speed of the mixing elements is greater than iO when the movement of the conveyor 2 increases.

The mixing elements B due to the displacement of the axes of the shafts relative to the axis of the casing 6 of the agitator-gates 5 exit through the transverse sections 15 made in the casing 6 at 0.15-0.25 distance between the agitator-grip 5 and the conveyor 2 and produce alignment of the grass layer on the conveyor 2, preventing the formation of blows. In addition, in the housing 6 of the agitators 5, through a pipe 9 from the bypass collector 4, a hot coolant is supplied, which

25 of the slits 7, gets into the top layer of the material being dried, performs additional heat treatment of the grass and creates an air curtain, preventing the main heat transfer fluid from one drying section to another. Similarly, the first and last sections of the drying chamber 1 are separated from the surrounding atmosphere.

Part of the spent heat carrier through the exhaust pipes 12 is removed from the drying chamber 1, and part of it through the recirculation manifolds 13 is returned to the suction side of the nozzles of the fans 10, where, mixed with fresh hot coolant, is fed to the distributors 3

Dp preventing the fans from clogging up with 10 hay delivered through the recirculation manifolds 13, separators 14 with hoppers 17 are installed in the recirculation boxes 13 in front of the suction nozzles of the fans 10.

In the heel pipes 15 of the separator 14, air is periodically supplied with overpressure and exits through the nozzles 16 in the form of jets directed tangentially to the underlying pipe 55. Bam 15 to the side of the bunker 17. Hay, retained by the pipes 15, is blown off into the bunkers 17, from which it is periodically removed.

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Regulation of the flow of heat transfer fluid through the exhaust pipes 12 and of the air into the drying zones from the fans of the 10 gate of the heat transfer fluid is recirculated to the agitators and closures 5, as well as to the successful collectors 13, by a portion of the waste heat dampers 18.

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I. Editor Patrusheva

991/49 Circulation 635 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch 1SChP Patent, Uzhgorod, Project St., 4

Compiled by S. Polnsky

Tehred A.Ach Corrector S.Shekmar

Claims (2)

1. INSTALLATION FOR DRYING HERBS, containing a partitioned drying chamber with a conveyor for moving grass and gas distribution manifolds located under the conveyor, and heat ventilation equipment with recirculation and bypass collectors _{s , characterized in that, in order to improve the quality of drying, above the conveyor in each sections of the chamber are additionally equipped with agitator shutters connected to the bypass collector, and each recirculation collector is equipped with a separator in the form of a hopper placed units with heat ventilation equipment, and a hollow pipe system installed in cross section of the recirculation manifold with slotted nozzles directed tangentially to the underlying pipe, and each agitator-shutter contains a cylindrical body with transverse slots and a shaft installed in it with mixing elements partially extending outside the body through the transverse slots. 2. Installation under item ^ characterized in that the agitator-gate shaft is offset from the axis of its housing by 0.15-0.25 distances between the agitator-gate and the conveyor towards the latter. n S and „„ 1216597