SU75169A1 - Electric continuous heater for liquids and gases - Google Patents

Description

The invention is a straight-through electric heater for liquids and gases, made, like the well-known, steel pipes, one part of which is superimposed on the other, so that it forms a winding, while the second is the core of the latter.

As a result, the tubes are heated both by hysteresis and eddy currents, and by Joule heat.

Distinctive feature

The proposed electric heater is that both parts of the coils are included in the supply circuit and are arranged so that for the first part forming the winding of one electromagnetic system, the core is the metal of the turns of the second part. The core of another electromagnetic system formed by the second part of the turns is the metal of the turns of the first part.

Thus, both parts of the coils are actively involved in heating.

The proposed electric heater is schematically shown in FIG. 1, 2 and 3.

As shown in the electric circuit (Fig. 1), water through insulator 1 enters coil 2, then it is connected in series with it coil 3, and again goes out through the insulator in the form of steam.

FIG. 2 and 3 two projections of the heater are shown with partial cuts; The arrows indicate the direction of movement of water or steam and the direction of current or magnetic flux in one of the half periods.

The main disadvantage of the steel electric heater (low resistivity) in this case is largely compensated for by heating it with eddy currents and due to the remagnetization.

The main advantages of the proposed heater are the following:

1) the absence of a separate electric heater, which reduces the consumption of metal;

2) an increase in the thermal efficiency due to the direct contact of water with the heater;

3) the temperature of the heater is relatively low, even at high current densities, due to the fact that the heater is washed by fast-flowing water;

4) no need for thermal insulation, since the external pipes are washed with cold water, and the internal with hot water;

placed far from the outer perimeter of the boiler.

Subject invention

A continuous electric heater for liquids and gases, made in the form of a coil of iron pipes, in which one part of the coils is superimposed on another part, and these parts form: first

FIG. one

electrical winding, and the second magnetic core of the latter, characterized in that both parts of the coils are included in the supply circuit, the second part covers the first, also forming a winding, the core of which is the first part, so that both parts of the coil are heated as due to Joule heat, and due to hysteresis and eddy currents.

FIG. 2

FIG. 3