SU976239A1 - Loose materials dryer - Google Patents

Description

(54) SUSHNL1SA FOR BULK MATERIALS

The invention relates to the drying technique and the production of dry yeast.

A device for drying bulk materials is known, which contains a chamber inside which vibratory tracks are installed, offset one from another to move the material from top to bottom, a supply system of a C5 mile agent from a calorific installation and a system for discharging the drying agent, including axial fans. Each rus of vibrolocks is supplied with a pore mounted additional and vibrolocks. All vibratory trays are mounted on plate springs with the possibility of varying the oscillation frequency and are set in motion in pairs to balance static loads with the eccentric drives driven by electric motors with variators.

To change the direction of oscillation, the angle of inclination of the leaf springs is adjusted, for example, from 50 to 90 to the horizontal. In order to orient products when moving and prevent them from sticking together, each vibratory channel is provided with strips that are fixed alternately across the tray in the lower and upper parts

The disadvantages of the described device are the complexity of the design and its inapplicability for drying the yeast, due to poor-quality drying. Also known is a multi-tape sutchik containing several placed one above the other, moving in opposite directions of ribbons from a grid with very small openings. This is characterized by the fact that there is a guide channel only on one side of the tape. With him

15 connects the outlet channel, the bottom of which is made in the form of a sieve. On the free side of the dryer are easily removable metal covers that cover the tape. To continuously monitor the state of bulk solids during their drying, the ribbons are made in the form of a sieve in order to allow easy access to one of its sides. The dryer has several support rollers that prevent the upper part of the bands from hanging. The rollers are seated on ball bearings that do not require inspection and

30 are placed under the side guides on which the belt 2 moves.

The disadvantages of this design are continuous surface heating of the upper branches of the tapes with the material being dried in the direction of the tapes movement, which, when dried, causes the yeast to die prematurely due to prolonged temperature exposure. The premature death of yeast cells reduces the quality of the yeast, i.e. yeast costs per unit of processed products increase, for example, making dough from flour, as well as design complexity due to the large number of rollers supporting the upper branches of the belts. The closest in technical essence to the present invention is a dryer for bulk materials, containing a chamber with mesh conveyors regularly installed in it and gas-distributing devices connected to the source of heat-transfer fluid located between the branches of each conveyor and having discharge nozzles facing the upper branches of the conveyor Sz}.

However, the known dryer does not ensure an even distribution of the heat transfer medium, which, in turn, leads to uneven drying.

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

The goal is achieved by the fact that each gas distribution device is made in the form of a system of pipes arranged across the conveyor parallel to the source of the heat transfer medium through a duct placed along each conveyor on both its sides.

FIG. 1 is a schematic representation of a dryer; a general view; FIG. 2 shows section A-A in FIG. one.

The dryer contains a pelletizer 1, complexed above the suction chamber 2. Heater 3 (heat carrier source) serves to supply the heated mixture to chamber 2, in which conveyors 4 with drive drums 5 and followers of drum 6 are located. very small holes. Conveyors 4 are located one above the other with displacement and move in opposite directions. Outlet 8 serves to supply a heated air mixture from the heater 3 to the ducts 9. The box 9 is placed in parallel on both sides of each of the conveyors 4 along the entire length of the latter. In the walls of the ducts 9 facing the conveyors 4, with a pitch of 200-250 mm, holes are made in which pipes 10 are fixed with outlet pipes 11, facing perpendicular to the planes of the upper arms of the conveyors 4. The pipes 10 are located across the latter and serve as to feed the drying mixture to the upper branches of the conveyors, and to maintain them during operation. The box 9 and the nozzle pipes 1 form gas distribution devices. The pipe 12 is designed to drain dried yeast from the chamber 2.

The dryer works as follows

The drive drums 5 are turned on, the conveyors 4 are made to move. At the same time, the drying mixture is supplied from the heater 3, which through the taps 8, the box 9, the pipes 10 is supplied to the upper branches of the conveyors 4. The dryer is ready for operation. MoKiMJ € s yeast is forced through the lattice of the granulator 1 and | In the form of fibers are fed to the conveyor 4 of the upper rus. At the same time, the conveyor speed is consistent with the speed of yeast extrusion. When drying the yeast on the first conveyor 4, they, under the influence of the drying stream supplied with a certain pitch through the nozzles in the pipes 10 from below, break up into granules that are completely poured off from the torsion to the py 12 and are diverted to packaging. The supply of the drying mixture with a certain step will improve the quality of the yeast.

The use of the invention due to an improvement in the quality of drying will ultimately improve the quality of the yeast.

Claims (3)

1. Authors certificate. USSR №456124, cl. F 26 B 15/12, 1970. 2. The patent of Poland No. 55177, cl. F.26 B, 1970. 3. USSR author's certificate No. 500439, cl. F 26 B 17/04, 1973.  t. r t ° .t t. t. , P Phia.2.