SU19140A1 - Conveyor dryer for vegetables, grains, etc. - Google Patents

Description

In the used conveyor dryer for vegetables, grains, etc., with moving belt conveyors and air passage from the top, the inventor proposes to use the upper space of the burner for gas supply and air supply pipes in a split vertical space. For automatic control of the gas inlet in the burners, it is recommended to use a system of unequal arms, pivotally connected by metal rods with a large expansion ratio.

In FIG. 1 shows a vertical section of the dryer along the IR line in FIG. 2; FIG. 2 is the same, vertical pr13 cut along the line LM in FIG. one.

The structure and operation of the dryer consists in the following: endless mesh metal bands 2-2 placed on rollers 2a-2a rotating in ball bearings whose housings are embedded in walls are placed in a quadrangular iron lined in half-brick length 1 (Fig. 1, 2). shells 1. Rollers 2a-2a on one xyutz have mutually engaged

gears 3 and a pulley Over with a belt 36 worn on the transmission pulley. On the side opposite to the gears 3, the rollers 2a - 2a have screws 2 for tightening the strips 2, 2. For filling the goods intended and prepared for drying, the housing 1 is equipped with a funnel 4, from which the dried goods enter the drum 5 with the four-bladed cast iron wheel Z. disruption of the dryer and heat leakage. Such a drum 56 with a four-blade inside its wheel is also located at the outlet of the product being dried and is intended to prevent external cold air from being sucked through the outlet to the dryer chamber.

The product entering through the drum 5 pours onto the upper band 2, from which, passing to the opposite end, is poured onto the second, which is located below, the band 2 and goes along the opposite side, from the end of the second band

the third belt 2 and so on up to the last belt with which it is poured dried into the drum 56 and out of it.

Drying of the product moving on the belts 2-2 is carried out by gas burners: 6-6 tubes placed in the dryer arch in arranged holes 7, closed with washers 8. Gas burners b, to prevent them from burning, put the upper tape at a sufficient distance. and for uniformity of heating, the detachments from the ribbons 2 are perforated cast-iron plates 9–9, resting on the boards of gas partition walls, the end burners 6–6 into separate groups. In such furnaces 11--11 arranged, tubes 12-12 are placed against the burners and connected to branched pipe 13, which is used to blow a fan through pipes 12--12 into the furnaces 11-11 of air heated in furnaces and then through holey plates. 9 for moving on mesh belts 2, 2; The incoming heated air penetrates the product in a downward flow, takes away moisture from it and is removed downwards through the outlet pipe 14 connected to the collector 14a by suction by a fan.

At low air saturation with water vapor from the drying product, to increase the efficiency of the proposed dryer, part of the warm, exhaust air is directed to the branched pipe 13, for which the latter is connected to the pipe 14, and through the pipes 12-12 the air enters back under the roof of the dryer, from where, after heating, it descends again down the product.

Pipes 14 and 13 must be insulated from radiating heat walls. The exhaust fan and its discharge through the branched pipe 13, as well as the injection of incompletely exhausted air into it, must be designed so that the gas pressure in the gas pipelines from which it enters the gas burners through the valve is not less than 50 mm water. the pressure in the dryer must not be greater than atmospheric, for which it is necessary to suck through the pipe 14 as much air as it enters the sapilka. andI

In order to obtain air of a certain temperature from gas burners 6, the gas inflow to the burners is automatically regulated, for which, in the furnaces 11-11, long successively made of metal, well expanding from t ° rods, hingedly connected to the system of unequal arms 16-16, are placed ; the rods 15 are released outside the housing and pivotally connected to the lever 17 pivotally connected to the arms 18-18, in turn the hinges | but connected to the levers 19-19 times the number of burners. With fluctuations of the operating temperature, the length of the rods 15-15 varies, and depending on this noBd the levers of the valves of gas burners 6-6, which control: the amount of gas flow to the burners.

The burners are ignited by a wire 20 (fig. 2) that is separately connected to a gas line and has a small orifice with a small fire for gas. For the proposed dryer, all combustible gas can be used, such as: generator, luminaire and gasoline; it only needs to be well cleaned from all impurities that are harmful to the product to be exposed.

Walls 1a-1a of the dryer case are made for the convenience of inserting tapes, etc., opening, and viewing windows 16-16 are made in them (Fig. 1).

The housing 1 for the convenience of assembly and repair is made of individual parts connected by iron elbows. In order to reduce heat loss through the radiation of walls, between the last p holders is placed a heat-resistant gasket or other gasket. At the bottom of the dryer there are cleansings 21-21.

The subject of the patent.

Claims (2)

1. A conveyor dryer for vegetables, grains, etc., with moving conveyor belts and an air passage from top to bottom, characterized in that burners 6 are installed in its upper space separated by vertical partitions, which serve to supply gas, and supply tubes 12 . 2. In a conveyor dryer according to claim 1, use of an automatic device for regulating the gas inlet to the burner, consisting of a system of unequal arms 16, pivotally connected to each other by means of bars 15 made of metal with a large expansion coefficient, of the last goal bar out of the dryer and pivotally connected with an unequal-arm lever 17, the other end connected to the pull-rod 18 and the levers 19, fip1 2