RU2335726C1 - Device for sediment removal in heat-exchange equipment - Google Patents

Abstract

FIELD: heating; chemistry.

SUBSTANCE: invention may be used for preventing sediments formation in heat-exchanging equipment - steam and water boilers of low and medium pressure, in heat-exchangers and geothermal systems. Device includes pulse generator and mechanical vibrator in the form of cylindrical pipeline having insertion consisting of two pipelines arranged in axial alignment. External pipe is made of ferromagnetic material and internal pipe is made of diamagnetic material. Device is provided with iron core being in coaxial alignment with internal pipe. Besides, positive potential is supplied to iron core with regard to device housing. Magnetic field of induced coil is used more effectively for water treatment, while positive potential supply to iron core contributes to more intensive transfer of iron ions to treated water.

EFFECT: improved prevention of saline deposits in heat-exchanging equipment and improved coagulation of suspended particles.

2 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, as well as in the equipment of geothermal systems.

Known devices for preventing the formation of deposits in heat exchange equipment, which use the emitter of mechanical vibrations, as well as the influence of a magnetic field on scalers. One of such inventions [1] is an invention, which is a device containing a mechanical oscillator emitted from a pulse generator, characterized by the fact that the emitter is made in the form of a cylindrical pipeline having an insert of diamagnetic material (stainless steel, aluminum, etc.). d.).

The disadvantage of this device is the low efficiency of preventing the deposition of salts on the surface of heat exchange equipment due to the use of an insert made of diamagnetic material.

As the closest prototype selected patent of the Russian Federation [2]. The invention is a device consisting of a pulse generator and a radiator of mechanical vibrations, made in the form of a cylindrical pipeline with an insert of two coaxially placed pipes, while the pipe of a smaller diameter is made of diamagnetic material, and the larger one is made of ferromagnetic material with high saturation magnetostriction.

The invention has significant drawbacks in that, on the one hand, the electromagnetic field is ineffectively used for water treatment, on the other hand, suspended particles formed in the device have low coagulation ability. As a result, the device has a low efficiency of preventing the deposition of salts in heat exchange equipment.

The technical solution of the proposed device is to increase the prevention of salt deposits on the surface of heat exchange equipment.

The technical solution is achieved in a device for controlling deposits in heat-exchange equipment, consisting of a pulse generator and a mechanical oscillator, made in the form of a cylindrical pipeline with an insert of two coaxially placed pipes - the outer one of ferromagnetic material and the inner of diamagnetic material, so that the inner pipe equipped with an iron core located coaxially with it along the central axis at the level of the winding of the inductor, while the iron core is fed through negative potential from a direct current source.

The novelty of the proposed proposal is that in this case, the magnetic field of the coil of the inductor is more efficiently used for water treatment, and the supply of a positive potential to the iron core contributes to a more intense transition of iron ions into the treated water, thereby improving the coagulation of particles of suspension formed in magnetic field.

According to the patent and scientific and technical literature, no similar set of features was found, which allows us to judge the inventive step of the proposal.

The invention is illustrated by drawings (see figure 1).

The device for controlling deposits in heat exchange equipment consists of a pipe 1 having an insert made of two pipes — an inner pipe 2 made of diamagnetic material and an outer pipe 3 made of ferromagnetic material (permendure, alpha, etc.). On pipe 2 there is a winding 4 of an inductor connected to a pulse generator 5. Pipeline 1, insert 2, 3 and winding 4 are a source of mechanical vibrations transmitted to the working surface of heat exchange equipment 6. An iron core 7, mounted coaxially with inner pipe 2, is connected to the positive pole of the DC source 8. The negative pole of the source 8 is connected to the housing of the heat exchanger.

The device operates as follows.

When water is supplied through pipeline 1 to a heat exchange apparatus, a pulsed current generator 5 is simultaneously turned on, which supplies current pulses to a winding 4 uniformly placed in a cylindrical insert between a pipe 2 of a smaller diameter and a pipe 3 of a larger diameter.

The electromagnetic field created by the current in the winding 4 generates in the cylindrical insert mechanical vibrations of a wide range of frequencies and amplitudes, because In the ferromagnetic material of the outer pipe 3, there is a magnetostriction phenomenon and the action of ponderomotive forces, which tend to either compress or expand the cylindrical insert. As a result of this, mechanical vibrations that occur are transmitted to the working surfaces 6 of the heat exchanger.

On the other hand, the pulsed electromagnetic field generated by the current in the winding 4 is closed to the iron core 7, thereby increasing the induction of the transverse magnetic field in the annular space between the core 7 and the inner tube 2 (see figure 2). This contributes to a more effective effect of the magnetic field on scale builders in the solution of the treated water [3].

The supply of a positive potential to the iron core 7 relative to the body of the heat exchanger promotes a more intensive transition of iron ions into the solution of the treated water, which contributes to more efficient coagulation of suspended particles [4] formed in the magnetic field in the annular space between the inner tube 2 and the iron core 7.

Figure 2 shows an exemplary arrangement of magnetic field lines in a cylindrical insert in the absence and presence of an iron rod. In the first case, the lines of force of the magnetic field are concentrated closer to the outer pipe 3 (since the pipe 3 is made of ferromagnetic material). In the central part of the inner pipe 2, the field is weak. In the second case, almost the entire field created by the winding 4 is closed to the iron core. The flux of the magnetic field in the annular space between the iron core 7 and the inner tube 2 increases. The flow of the treated water crosses all the lines of force of the magnetic field in the annular space. In this case, the action of the Lorentz force also has the greatest effect.

Thus, the installation of the iron core coaxially with the inner tube of diamagnetic material and the supply of a positive potential to the iron core relative to the body of the heat exchanger intensifies the process of water treatment, thereby increasing the efficiency of preventing solid deposits on the working surfaces of the heat exchange equipment.

Information sources

1. Patent of the Russian Federation: RU 2151355 C1, M.C. F28G 7/00, 06/20/2000

2. Patent of the Russian Federation: RU 2206853 C1, M.Kl .. F28G 7/00, 06/20/2003

3. Tebenikhin EF Non-reagent water treatment methods in power plants. M .: Energy, 1977, 183 p.

4. Klyachko V.A., Apeltsin I.E. Natural water treatment. M .: Gosstroyizdat, 1971, p.129-132.

Claims (1)

A device for controlling deposits in heat-exchange equipment, consisting of a pulse generator and a mechanical oscillator, made in the form of a cylindrical pipeline with an insert of two coaxially placed pipes - an outer one made of ferromagnetic material and an inner one made of diamagnetic material, characterized in that the inner tube is equipped with an iron core located coaxially with it along the central axis at the level of the winding of the inductor, while a positive potential is applied to the iron core l from a direct current source.

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