RU2349855C1 - Scale prevention device - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: device comprises a pulse generator and a mechanical vibration transmitter made as a cylindrical pipe with an inserted part. The inserted part is made as two diamagnetic pipes - inner and outer ones - which are coaxially set in one another and equipped with a diamagnetic cup in between; the transmitter coil winding is mounted at the outer pipe.

EFFECT: increasing antiscaling water treatment efficiency.

1 dwg

Description

The invention relates to heat engineering, in particular to prevent deposits in heat exchangers - steam and water boilers low and medium pressure, in heat exchangers, water heaters, etc.

Known devices for preventing the formation of scale using disturbing vibrations, in which the oscillatory movement of the walls of the heat exchange equipment is due to the electro-hydraulic effect (Utkin effect) [1].

One of the disadvantages of the known devices is the low efficiency of preventing the formation of scale on the heat exchange surface due to the fact that the magnetic field energy of the emitter coil of mechanical vibrations is either not used at all or is poorly used for water treatment. This is due to the fact that the electromagnetic field of the emitter coil simply closes to the metal structure of the pipeline made of ferromagnetic material (steel, cast iron). And as experiments show, the combined use of magnetic and ultrasonic methods to prevent salt deposition gives better results [2].

Closest to the claimed invention is a known invention, which is a device containing a mechanical oscillator connected to a pulse generator, characterized by the fact that the radiator is made in the form of a cylindrical pipeline having an insert of diamagnetic material (stainless steel, aluminum, etc. ) [3]. In the known invention [3], the coil of the emitter of mechanical vibrations is wound on the diamagnetic part of the pipeline, due to which the magnetic field inside it has a maximum value and water, crossing the lines of force of the magnetic field, is processed. In this case, the effect of water treatment is achieved due to the complex effect on the process of scale formation of mechanical vibrations and a pulsed electromagnetic field of high intensity.

The disadvantage of this invention is the low efficiency of preventing the formation of scale on the heat exchange surface due to the fact that the magnetic field of the emitter coil weakly affects the treated water. This is due to the fact that the treated water only once crosses the lines of force of the magnetic field of the coil in the cavity of the pipeline. The results of numerous studies have shown that the residence time of the treated water in a magnetic field and the number of intersections of the magnetic field lines by it play a significant role in increasing the processing efficiency. The design of the apparatus for magnetic treatment of water is carried out taking into account these features [4, 5].

The technical solution of the proposed device is to increase the effectiveness of preventing the formation of scale (salt deposits) on the surface of the heat exchange equipment.

The technical solution is achieved by the fact that in the device for preventing the formation of scale, consisting of a pulse generator, a radiator of mechanical vibrations, made in the form of a cylindrical pipeline with a diamagnetic insert, the insert is made of coaxially placed one inside the other of the outer and inner pipes of diamagnetic material, between which is installed a diamagnetic cup, while the winding of the coil of the emitter of mechanical vibrations is placed on the outer tube.

The invention is illustrated in the drawing.

The device for preventing the formation of scale consists of a cylindrical pipe 1 having a part 2 made of diamagnetic material (copper, stainless steel, etc.), an outer pipe 3 of diamagnetic material, on which the winding 4 is connected evenly, connected to the pulse generator 5 as well as a diamagnetic cup 6 installed between the outer pipe 3 and the inner pipe 2 coaxially with them. The outer pipe 3 is fixed with its lower end in the metal structure 7 of the heat exchanger, and its upper end is plugged on the surface of the pipeline 1. The diamagnetic cup 6 faces its bottom towards the heat exchanger.

The device operates as follows.

The treated water is supplied through a pipe 1 to its diamagnetic part 2, then through an annular channel between the glass 6 and the inner pipe 2 it enters the annular channel between the glass 6 and the outer pipe 3 and enters the heat exchange equipment.

When water is supplied to the heat exchange equipment, a pulsed current generator 5 is simultaneously turned on, which supplies current pulses to the winding 4. The electromagnetic field created by the current in the winding 4 generates mechanical vibrations in a cylindrical insert in a wide range of frequencies and amplitudes, because in the ferromagnetic material of the pipeline 1 there is a phenomenon of magnetostriction and the action of ponderomotive forces, which tend to either compress or expand the cylindrical insert. As a result of this, mechanical vibrations arising are transmitted to the working surfaces 7 of the heat exchanger, preventing the deposition of salts on the inner surface of the insert and the adjacent parts of the metal structure of the heat exchanger.

At the same time, the pulsed electromagnetic field created by the current in the winding 4 acts on the water moved in the annular channels between the pipes 2 and 3 and the glass 6, directly in the cavity of the cylindrical insert. In this case, the magnetic field of the winding 4, on the one hand, closes on the ferromagnetic part of the pipeline 1, and on the other hand, on the metal structure 7 of the heat exchanger. This creates a strong magnetic field at the points of rotation of the water in the annular channels, which contributes to a more efficient formation of crystallization centers in the treated water, especially since the turbulence of the water flow increases in these places. In this case, the treated water crosses the lines of force of the magnetic field several times and the residence time of water in it increases. All this creates the conditions for a more effective effect of the magnetic field on the formation of crystallization centers [4], thereby reducing salt deposition on the surface of heat-exchange equipment.

Thus, the implementation of the insert from the outer and inner pipes coaxially placed in one another of diamagnetic material, between which a diamagnetic cup is installed, and the placement of the coil of the emitter coil of mechanical vibrations on the outer pipe can increase the efficiency of preventing the formation of scale (salt deposits) on the surface of heat exchange equipment.

Information sources

1. A.S. USSR No. 322592, F28G 7/00.

2. Tebenikhin E.F., Starovoitov B.C., Chukanova A.M. The effect of magnetic and ultrasonic fields on the value of deposits in the condensers of turbines of TPPs // Tr. MPEI, 1981, issue 535. - S.68-70.

3. Patent of the Russian Federation RU 2151355, F28G 7/00, publ. 06/20/2000.

4. Tebenikhin EF Non-reagent water treatment methods in power plants. M .: Energia, 1977 .-- pp. 80-98, pp. 23-52.

5. Dushkin S.S., Evstratov V.N. Magnetic water treatment in chemical plants. M .: Chemistry, 1986. - p. 68-75.

Claims (1)

A device for preventing the formation of scale, consisting of a pulse generator, a radiator of mechanical vibrations, made in the form of a cylindrical pipe with a diamagnetic insert, characterized in that the insert is made of coaxially placed outer and inner pipes of diamagnetic material, between which there is a diamagnetic cup, while the winding of the coil of the emitter of mechanical vibrations is placed on the outer tube.