SU436218A1 - VIBRATION DRYER FOR BULK MATERIALS - Google Patents

Description

one

Vibration dryers for bulk materials are known, which contain a vertical heat-insulated chamber with a screw-type vibrating conveyor placed in order to transport the material being dried from the loading device "unloading", a cylindrical shell located along the vertical axis of the vibrating conveyor, and heaters installed around it.

The proposed dryer can reduce energy consumption and prevent sticking of the material being dried. This is achieved by the fact that the heaters are located from the bottom of the chamber at a distance of 20-50% of the height of the vibrating conveyor, the cover above the latter is made blank, and the lower part of the chamber, free of heaters, forms with the vibrating conveyor an annular gap in the upper part of the chamber, moisture vapor penetrates the material being dried in its lower part and is removed through perforations made in the shell.

The drawing schematically shows the described dryer.

The dryer contains a casing 1 with a vibrating trap 2 rigidly attached from the inside and a thermally insulated chamber 3, between which in the upper part there is a heater 4 with nozzles 5 and 6 for supplying and discharging heat carrier, respectively. The heater covers vibratra.nsporter 50-80% of its height. The cavity A is formed in the lower part of the dryer. The casing 1 is attached to the bottom 7, mounted on vibrostrom 8 with vibracors 9. In the lower part of the casing there is a loading device 10, and in the top - a discharging device 11. The shell 12, located at the bottom of the casing, attached to the insulating lid 13 mounted on the chamber 3. Between the shell 12 and the vibrating conveyor 2 there is an annular gap a, and in the lower part of the shell there are several rows of holes b.

The dryer works as follows.

Wet material through the loading device 10 enters the lower branch of the vibrating conveyor 2. And moves upwards due to the directional vibration generated by the vibrators 9. The vibrating transponder can be

made continuous or split vertically with shifted one relative to the other elements. The latter form allows the dried material to be additionally displaced when flowing from the previous element to the next. Heating of the material during the drying process occurs in two stages. The first stage of heating is carried out on the LOWER branches of the vibrating conveyor 2 due to the heat released during the drying of the material.

vapor moving from top to bottom along the annular

the gap a and those entering through the openings b and the open end of the end to the central shell 12, through which the vapor is withdrawn from the dryer.

The second stage of heating takes place on the upper branches of the vibropanoporter 2, which are enclosed and heated through the wall of the casing 1 by the heater 4. The dried material is removed from the casing with the aid of the discharge device 11.

Thus, installing the heater in the upper part of the dryer and preheating the wet material on the lower branches of the vibrotransport using exhausted vapors prevents the material from sticking to the walls, since the material touches the branches of the vibroporter that are less heated than the heaters. The use of the heat of vapor released to preheat the incoming material reduces energy-intensive costs, since there is no need to supply additional coolant.

Subject invention

Vibration dryer for bulk materials, containing a vertical heat-insulated chamber with a helical vibrating conveyor placed in it to move the dried material from the loading device to the discharge one, located along the vertical axis of the vibrating grass porter, a cylindrical shell and heaters installed around it, so as to reduce energy consumption and preventing sticking of the rising material, the heaters are located from the bottom of the chamber at

a distance of 20–50% of the height of the vibrotransporter;

moisture vapor released in parts of the chamber, penetrating their material to be dried in its lower part and removed through perforations made in the shell.