SU430270A1 - DRYER FOR ELECTRODES - Google Patents

Description

one

Electrode driers are known that contain a heat-insulated chamber with a conveyor placed therein for moving the dried products from the loading device to the unloading device and electrical heaters located in the chamber.

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

The goal is achieved by the fact that electric heaters are made in the form of pairwise arranged cylindrical collectors having perforations in the upper part and communicating with a source of compressed air; and in each pair adjacent collectors are connected to a source of compressed air from opposite sides.

FIG. 1 shows schematically the described dryer in a perspective view; in fig. 2 - the same cross section.

The dryer contains a heat-insulated chamber 1 with a conveyor 2 placed therein for moving the dried electrodes 3 from the loading device to the unloading one (not shown).

Compressed air is supplied through fittings 4 from opposite sides of pairwise arranged perforated cylindrical headers 5 installed in chamber 1 along its entire length and connected to transformer busbars 6, 7 (in the drawing

not shown) and to the compressed air supply system.

For even air distribution

over the entire length of the dryer, the number of collectors must be at least two, and in the case of

the need to increase the power of the dryer

their number increases by a factor of two.

When supplying compressed air from one side of the collector, the heating of the heat carrier will not be the same for the length of the collector: at the beginning of the collector the temperature is lower and at the end higher. To equalize the temperature in the dryer chamber, it is necessary to install at least two electric heaters with a counter

air intake.

To clean the tunnel chamber, the dryer is equipped with hatches that open from the sides (not shown).

The dryer works as follows.

The electric current flowing through the collectors 5 causes a proximity effect and heats them. The compressed air supply is then turned on by a valve (not shown). The cold air, the passage through the collectors, is heated and through the holes and goes into the drying zone. At this time, the chain conveyor 2 is suspended with suspended electrodes 3.

The current is supplied to the collectors 5 from a step-down transformer (on

the drawing is not shown). Transformer has

seven voltage levels of 3–20 volts. The dryer is safe to use.

The selection of the current for heating the collectors is made by changing the transformation ratio by manually switching the number of turns of the transformer primary winding.

The drying speed can also be regulated by the supply of the drying agent, i.e. the compressed air supply valve.

Compressed air is usually supplied at a pressure of 4-5 atm.

For each pair of collectors, the air inlets 4 are located at opposite ends, which ensures the constant temperature throughout the length of the dryer.

In the case when the technological regime requires drying in several zones, a multi-zone dryer can be easily mounted from separate sections, and the temperature in each

the sections are easily regulated by air supply valves and transformer voltages.

Subject invention

Claims (2)

1. Dryer for electrodes, predominantly chemical current sources, containing a heat-insulated chamber with a conveyor placed in it to move the dried products from the charging device to the discharge chamber and electric heaters located in the chamber, characterized in that, in order to improve the quality of drying, electric heaters are designed as pairs arranged cylindrical collectors with perforations in the upper part and communicated with a source of compressed air. 2. Dryer according to claim 1, characterized in that in each pair adjacent collectors are connected to a source of compressed air from opposite sides.