JPS6231131Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magnetic separation device that separates and recovers magnetic particles mixed in a fluid.

Magnetic separation equipment is used to separate and recover magnetic particles from steel wastewater such as hot rolling wastewater from steel materials, converter dust collection wastewater, vacuum degassing equipment cooling wastewater, or various industrial wastewaters. As shown in Fig. 1, a filter medium 4 made of a multilayer mesh made of magnetic fine wire is placed in a filter container 3 which has a raw water inlet 1 and a treated water outlet 2 on the bottom and top surfaces, respectively. An excitation coil 5 is provided so as to be wound around the outer circumference of the filter media 4,
A yoke (yoke) 6 for guiding the lines of magnetic force is provided to surround the excitation coil 5, and pole pieces (magnetic pole irons) 7, 8 are provided at the top and bottom of the filter media 4 to generate a uniform magnetic field in the filter media 4. By passing raw water through a magnetized filter medium 4, magnetic particles in the raw water are captured by magnetic force. However, in the excitation coil 5 in the conventional magnetic separation device, a copper pipe 9 through which cooling water flows is fixed to the edge of a copper plate 10 interposed between the coil windings, and heat generation occurs when a large current is passed through the excitation coil. By allowing the cooling water flowing through the copper pipe 9 to carry out the heat to the outside, heat is prevented from being trapped within the yoke 6 and causing overheating.

However, this structure has the drawback of increasing running costs and equipment costs because cooling water is consumed.

In this invention, the yoke is filled with resin and the gap between the inner surface of the yoke and the excitation coil is filled with the resin, which allows the heat generated by the excitation coil to be transferred to the yoke and prevents overheating without passing cooling water. It has been made possible.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In the figure, the same reference numerals as in FIG. 1 indicate the same parts. In the embodiment shown in FIG. 2, the yoke 6 is filled with a highly heat-resistant epoxy resin 11, and the copper pipe 9 shown in FIG. 1 is omitted. When the excitation coil 5 (heat generation amount: 6 kW) was energized in this way and the temperature of each part was measured, the excitation coil 5 did not rise above 135°C, and the surface of the yoke 6 did not rise above 86°C. Also, when raw water at 40°C is supplied from the raw water inlet 1 and overheated, the heat of the yoke 6 is carried away with the treated water, so the surface temperature of the yoke 6 decreases to 51°C and the excitation coil 5 The temperature also dropped to 72℃.

In the embodiment shown in FIG. 3, the yoke 6 and the lower pole piece 7 are integrated.
The heat conduction from the pole piece 7 to the lower pole piece 7 is made more active, and heat radiation is made more effective. By integrating the yoke and the pole piece in this manner, the degree of convergence of the lines of magnetic force is further improved, and an even higher magnetic field can be generated in the filter media.

As explained in the embodiments above, the magnetic separation device of the present invention makes it easier to transfer the heat generated by the exciting coil to the yoke by filling the gap between the inner surface of the yoke and the exciting coil with resin, thereby improving the heat dissipation effect. Therefore, overheating can be prevented without requiring cooling water, which has the beneficial effect of reducing running costs and equipment costs.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional magnetic separation device;
The figure is a longitudinal sectional view of a magnetic separation device showing one embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of a magnetic separation device showing another embodiment of the invention. 4...Filter media, 5...Excitation coil,
6...Yoke, 11...Resin.

Claims (1)

[Scope of utility model registration request] Fill the yoke surrounding the excitation coil with resin,
A magnetic separation device characterized in that the gap between the inner surface of the yoke and the excitation coil is filled with the resin.