SU1326315A1 - Method and apparatus for electromagnetic deposition of impurities - Google Patents

Abstract

The method of electromagnetic deposition of impurities and the filter for its implementation are related to the field of magnetic separation of substances and can be used in the chemical, metallurgical, mining, food processing, as well as in thermal and nuclear energy and can improve the efficiency and efficiency of the deposition process. by reducing energy consumption and increasing the force effect on the deposited impurities. The method consists in the deposition of ferromagnetic impurities by a pulsed magnetic field and their retention by a constant magnetic field. New in the proposed method is that through the external. The research institute solenoid passes direct current, and the internal coils operate in a pulsed mode with a shift of the maximum value of the pulse by half a period. The filter contains a non-ferromagnetic working chamber with a polygradient nozzle placed in it, a magnetizing system made in the form of a solenoid installed outside the chamber. New in the filter is that the solenoid is equipped with additional coils connected through one and installed coaxially to the solenoid, and the coils are separated from one another by ferromagnetic elements that can be extended in the form of rings narrowing to the peripheral sectional area, or in the form of plates radially located to the coils. The ferromagnetic elements are made of a magnet of a flexible material or of a hard magnetic material, but at the same time they are separated in thickness by non-ferromagnetic gaskets. 2 sec. f-ly, 2 zp f-ly, 4 ill. SL C

Description

one

. The invention relates to magnetic separation and can be used in the beneficiation of minerals, in metallurgy, thermal and nuclear energy, and other areas of magnitude for the magnetic separation of water disperse systems.

The purpose of the invention is to increase the efficiency of the deposition process by reducing energy costs.

The method is carried out as follows.

Example. In order to clean the condensate, the CHP in the polygradient nozzle creates electromagnetic fields with a strength of 80-120 kA / m, depending on the fractional and dispersed composition of the corrosion products. Based on experimental data obtained when washing a nozzle packed with ferromagnetic impurities placed in a magnetic field with a decreasing temporal intensity of 120 kA / m and 10 kA / m, a field of 20-30 kA is sufficient to hold particles captured by the nozzle. m Therefore, the polygradient nozzle is placed in a constant magnetic field with a strength of 20–30 kA / m, on which a pulsed magnetic field is applied with maximum values of 60–90 kA / m. To reduce the EMF of self-induction induced in adjacent electric coils, in this way the maximum value of the pulse is shifted by half a period. The frequency of the pulses is chosen from the ratio

V at recommended speed

B

filtering V 250 m / h and a spherical nozzle jj 6 mm, taking the distance between the capture zones L 6 mm, receive the frequency of pulses Y 11.6 Hz. According to the obtained parameters (voltage, frequency), the electromagnetic system is selected. Tests have shown that the energy consumption has decreased by 1.1-1.15 times, which significantly increases the efficiency of the device, and the efficiency of the deposition process increases 1.1 times.

The proposed method makes it possible to reduce energy consumption due to the separate operation of the magnetizing system (constant and pulsed mode) by 1.1-1.15 times and to increase the efficiency of operation due to the selected pulse frequency and shift maxi15.

half the period.

FIG. 1 shows the proposed device, a general view; in FIG. 2, section A-A in FIG. one; in fig. 3 shows a section BB in FIG. figure 4 is the same for ferromagnetic elements made in the form of plates mounted radially to the camera along its circumference.

The filter contains a non-ferromagnetic working chamber 1, filled with a ferromagnetic nozzle 2, an external solenoid 3, internal coils 4 separated by ferromagnetic elements 5, nozzles of the cleaned 6 supply and output of a purified 7 medium. Rings can serve as ferromagnetic elements (Fig. 3 or Fig. A).

The filter works in the following 1M way.

/

The cleaned medium through the nozzle 6 enters the working chamber 1, where, under the action of a high-gradient field, impurities are deposited at the contact points of the granules of the nozzle 2. The magnetic field is generated by a system consisting of an external solenoid 3 operating in constant mode and internal coils 4 a pulse mode with a maximum shift of half a period. With the help of ferromagnetic elements 5, in the adjacent areas of the nozzle, areas with elevated values of the magnetic field are created where deep cleaning takes place. The cleaned medium is brought out through the pipe 7. To simplify the construction, the inner coils 4 are connected through one to two circuits: terminals a and b - the first circuit: with and (- the second circuit (Fig. 1), which work with a shift of the maximum value of the pulse. saturating the nozzle with impurities turns off the magnetizing system and washing the nozzle, after which the cleaning process is repeated.

Claims (4)

1. A method of electromagnetic sedimentation of impurities, consisting in the npcf transmission of liquid media through a ferromagnetic nozzle placed in a pulsed magnetic field, characterized in that, in order to increase the efficiency of the deposition process due to the reduction of energy consumption, the nozzle is additionally affected by pos313 This magnetic field, and a pulsed field impose a zonal along the length of the nozzle, and between the adjacent zones the maximum value of the pulsed current is shifted by half a period. 2. A device for electromagnetic sedimentation of impurities, containing a non-ferromagnetic working chamber with a ferromagnetic attachment placed in it, a magnetizing system made in the form of a solenoid installed outside the chamber, the inlet pipe of the cleaned and removal of the purified medium, characterized in that and efficiency of the deposition process by increasing the force effect 15 on the deposited impurities, the filter is supplied with additional coils installed inside the solenoid and coaxially to it and electrically connected through one to two circuits, and ferromagnetic elements installed between the coils, 3. The device according to claim 2, characterized in that the ferromagnetic elements are made in the form of plates and are installed radially to the chamber along its forming, 4. A device according to claim 2, characterized in that the ferromagnetic elements are made with an internal diameter smaller than the diameter of the chamber. J4 t A 0 a 8 with a figure 1 Aa 5-5 5-5 fie. 2 3 & w. J .ff