SU1697280A1 - Induction heater of flowing medium - Google Patents

Abstract

The invention relates to t. forested electrical engineering. The aim of the invention is to increase the intensity and uniformity of heating of the medium. In an induction fluid heater, the heat generating element is made with a perforation of a special profile and fins. that, while observing the indicated ratio of re.ede, the hoop element and the vessel, creates an ordering effect. 1 hp f-li, 4 ill.

Description

The invention relates to induction heating devices for the heat treatment of fluids in various sectors of the chemical, petrochemical and food industries.

The aim of the invention is to increase the intensity and uniformity of heating of the medium.

FIG. 1 shows an induction heater with a fuel in the form of a perforated cylinder with external ribs, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 - sections BB and B-B in FIG. one; in fig. 4 shows a scan of the cylindrical surface of a heat generating element with inclined ribs.

The induction fluid heater contains an induction coil 1 enclosing a magnetically transparent capacitance 2, equipped with nozzles of inlet 3 and outlet 4 of the medium. Inside the winding 1, there are ferromagnetic heat generating elements 5 located on the ground of the electric drive 7. The heat generating GGVE, O (Fig. 1) has a uniform perforation π. forming a cylinder between the edges, the perforations are inclined to the radial plane, and the directions of the perforations of the adjacent rows are opposite to each other (Fig. 3).

Perforation contributes to the formation of axial fluid flow connections in the entire volume of the tank, creating a uniform temperature distribution in the vertical direction, since the axial flows that occur when passing through the holes of adjacent rows are directed to the opposite sides - one - up,

OTHER - VN1-3.

The TVE 5 ferromagnetic materials are located on the outer surface of the heat-generating element. FIG. 4 shows a scan of the cylindrical surface of the heat source C of its element with inclined

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ribs rigidly mounted on the outer surface of the fuel element with alternating angles of inclination.

The device works as follows.

When alternating voltage is applied to the induction winding, electromagnetic pulsating fields arise around it, under the influence of which eddy currents are generated in the ferromagnetic TVE 5, leading to heating of this element. TVEs, which are in a rotating state inside a magneto-transparent tank 2 filled with a fluid medium, provide an intensive and uniform heat treatment of the medium.

The design of TVE has a significant effect on the intensity of heat transfer and uniform heating of the medium, since TVE, being in a rotational motion, simultaneously plays the role of a mixing device. The location of the ribs on the outer side of the cylindrical fuel cell leads to more intense heating of the surrounding fluid than if they were on the inside, since in this case the body of the ferromagnetic fuel cylinder would act as a shield with respect to the inductor field. The ribs located on the inner side would not be affected by the floor, and their heating would occur only under the influence of heat transfer by thermal conductivity from the heated cylindrical part of the TVE. If the edges are located on the outside, then eddy currents directly arise in them under the influence of the inductor electromagnetic field,

In addition, the use of external ribs on fuel rods with alternating angles of inclination leads to a positive effect (more uniform heating of the fluid) due to the occurrence of axial fluxes in the medium, contributing to temperature averaging. For TVEs with external oblique ribs, the surface of absorption of electromagnetic energy and the intensity of its transmission of fluid increase.

The test results of an experimental prototype of an induction heater, when the heating curves of the fluid are taken off, allow us to conclude that

warming up the medium over the entire volume with the optimal combination of heat engineering and electrical efficiency is observed when the ratio of the diameter of the tank to the average diameter of the heat-generating

element equal to 1.2. The proposed design of an induction heater with submersible fuel elements provides an intensive and more uniform heat treatment of the fluid (reagents) and, as a consequence,

reduction of the process time and reduction of power consumption in comparison with the known induction method of heating chemical equipment by 15-20%.

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Claims (2)

1. An induction fluid heater comprising an induction coil enclosing a magneto-transparent cylindrical tank equipped with nozzles of medium inlet and outlet, and a perforated ferromagnetic heat generating element in it in the form of a cylinder with ribs, characterized in that increasing the intensity and uniformity of heating of the medium, the heat generating element is made rotating, said fins are mounted on its outer surface, and perforations are made between them rows along cylinder lines in the form of profiled channels, the longitudinal axis of each of which is inclined to the radial plane of the cylinder, and the direction of perforation of adjacent rows is mutually opposite, while the internal diameter-capacitance exceeds the diameter of the heat-generating element 1.2 times. 2. Heater pop. 1, characterized in that said ribs are mounted obliquely to the generator of the cylindrical surface and adjacent edges form an acute angle between them. 0 С good U 2 2S ZZS3Z2S3ZZSY 2Z77J gp games ts-zch ± zs ffsf . - m 4 $ ra-- Јt - (ZZZlZZZ§ZZZZZZZZ  U V h x h h h h UT SXTS kk one fej one I i fig a Editor N. Himchuk Compiled by O. Shchedrina Tehred M. Morgental Proofreader A.Osaulenko