RU2257017C2 - Induction device for heating and mixing of liquid substances - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: device has magnetic-transparent tank with input and output branch pipes, induction system positioned around tank, magnetic ducts of which are adjacent to magnetic-transparent tank by tooth layer, and ferromagnetic heat-emitting element positioned inside the tank, rigidly connected to mixer, provided with blades according to invention, induction system being made in form of separate one-phase inducers.

EFFECT: simplified construction, lower costs, higher reliability, simplified maintenance, broader functional capabilities.

3 cl, 2 dwg

Description

The proposed device relates to techniques for low-temperature induction heating and mixing of liquid media in a traveling electromagnetic field and can be used in chemical, oil refining and other industries, the technological processes of which require uniform heating and mixing of aggressive liquid media.

A device for mixing and heating liquid media (Michel Detroux. L'induction electrique en relève de la vapeur. Informations Chimie n ° 243. 1983. p. 197-204), consisting of a tank, inside of which on the axis there is a mixer with blades, driven by an external electric drive. To heat the liquid, an induction system located around the outer wall of the tank is used.

The known device has the following disadvantages: relatively high material consumption, complexity in the manufacture and operation.

Closest to the proposed is a device for heating and mixing a fluid (Patent of the Republic of Kazakhstan No. 3637, class N 05 B 6/10, bull. No. 3, 16/06/96), which contains a magnetically transparent container, around the wall of which there are three three-phase windings with turns laid in the grooves of the magnetic circuits, facing with a tooth layer to the cylindrical surface of the magnetically transparent container and shifted by 120 ° relative to each other in the horizontal plane. To fill the tank with liquid medium in the bottom and the cover there are inlet and outlet pipes. In the bottom part of the tank there is a hollow cylindrical ferromagnetic fuel element, which is rigidly connected to the central shaft using profiled blades and a sleeve. The lower and upper parts of the shaft are mounted on bearings.

The known device has the following disadvantages. The presence of the central shaft of the fuel element and its mountings makes it inefficient to use this device for heating and mixing aggressive liquid media. Under such conditions, wear is significantly accelerated and the likelihood of premature failure of all parts in direct contact with the liquid increases, which increases operating costs.

The technical problem solved by the invention is to create an induction device for heating and mixing the liquid, the design of which, while simplifying and reducing material consumption, would provide high reliability of the device and reduce operating costs, as well as expand its field of application.

The stated technical problem is solved in that in the known device for heating and mixing liquid media containing a magnetically transparent container with inlet and outlet pipes, an induction system located around the tank, the magnetic circuits of which are adjacent with a tooth layer to the magnetically transparent tank, and a ferromagnetic fuel element located inside the tank is rigidly associated with a mixer equipped with blades according to the invention, the induction system is made in the form of separate single-phase inductors.

In addition, in the proposed device, the blade of the mixer can be made with the possibility of rotation around its axis.

In addition, in the proposed device can be used stops for the fuel element located on the inner side of the walls of the magnetically transparent container.

In addition, in the proposed device can be used a compensator for the weight of the fuel element located in its central part along the axis of rotation.

The proposed device is schematically represented in the figures. Figure 1 shows a General view of the proposed device for heating and mixing liquid media with a partial cut-out of its walls for a better display of the structure. Figure 2 presents a view along arrow A.

The device comprises a magnetically transparent container 1 with nozzles for the inlet and outlet of a liquid medium. Around the tank is an adjacent induction system 2, consisting of 3-n (where n = 1, 2, 3 ...) inductors. Inside the tank there is a freely lying hollow ferromagnetic fuel element 3 connected to the mixer 4, equipped with blades 5, by means of spokes 6. The blades of the mixer are rotatable around their axis, which allows you to set an arbitrary angle of inclination to obtain the optimal ratio of lifting force and mixing in depending on the characteristics of the liquid medium. To improve the buoyancy of the fuel element in its design, a weight compensator 7 can be provided - a body hollow or filled with light material, the volume and density of which depend on the parameters of the working medium. To prevent immersion of the fuel element to the bottom inoperative on the inner wall of the tank can be provided stops 8.

The device operates as follows. After filling the magnetically transparent container 1 with a liquid working medium and supplying power to the induction system 2, a rotating magnetic field appears in it, the lines of force crossing the magnetically transparent container 1 induce eddy currents in the fuel element 3. The interaction of eddy currents, providing heating of the fuel element 3, with a rotating electromagnetic field generates a torque that sets the fuel element in motion in the direction coinciding with the direction of movement of the traveling electromagnetic field, while the fuel element is set to the operating position. The blades of the mixer 4, rotating together with the heat-generating element 3, create a lifting force that keeps it in working condition and provide intensive mixing throughout the volume and uniform heat distribution. Due to the implementation of the induction system of individual single-phase inductors, it is possible to set the speed and direction of rotation of the mixer by changing the number of poles, which is achieved by switching the phases on the inductors in the desired sequence.

Due to these features, in particular the absence of an axial shaft for securing the fuel element, the design of the device practically does not have friction parts, therefore, it has increased wear resistance in comparison with the prototype, lower material consumption and energy consumption. The fuel element can be easily replaced in case of wear or temporarily removed to provide full access to the entire capacity of the tank.

Claims (3)

1. An induction device for heating and mixing liquid media, comprising a magnetically transparent vessel with inlet and outlet nozzles, an induction system located around the vessel, the magnetic circuits of which are connected by a tooth layer to the magnetically transparent vessel, and a ferromagnetic fuel element placed inside the vessel, rigidly connected to the mixer equipped with blades , characterized in that the induction system is made of separate single-phase inductors, the number of which is chosen equal to 3n, where n = 1,2,3 ..., and equipped with a compensator m weight located at the center of the heat generating element along its axis. 2. An induction device for heating and mixing liquid media according to claim 1, characterized in that the mixer blades are rotatable around its axis. 3. An induction device for heating and mixing liquid media according to claim 1, characterized in that on the inner side of the tank there are stops for a ferromagnetic fuel element.

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