Dense medium double-vortex cyclone for coal dressing of coal mine

Abstract

The dense medium double-vortex cyclone comprises a cylinder and a conical barrel, a first feeding pipe, a first discharging pipe and a second feeding pipe are arranged at the two ends of the cylinder respectively, a connecting pipe is arranged between the cylinder and the conical barrel, a second discharging pipe is arranged at one end of the conical barrel, and a second discharging pipe is arranged at the other end of the conical barrel. A first polar plate and a second polar plate are respectively arranged outside and inside the cylinder, and a magnetic field exists between the first polar plate and the second polar plate. According to the invention, the first polar plate is arranged on the outer side of the cyclone, the second polar plate is arranged on the inner side of the cyclone, and the first polar plate and the second polar plate are arranged along the radial direction of the cyclone tube body, so that an inward magnetic field along the radial direction of the tube body is applied between the first polar plate and the second polar plate; according to the swirler, ferromagnetic particles in suspension liquid entering the swirler are subjected to centripetal force, the force applied to the inner wall of the swirler by the particles is reduced, and therefore the effects of reducing inner wall scraping and prolonging the service life of the swirler are achieved.

Description

technical field [0001] The invention relates to the technical field of dense medium cyclones, in particular to a dense medium double vortex cyclone for coal preparation in coal mines. Background technique [0002] Dense medium cyclone is a kind of coal preparation equipment with simple structure, no moving parts and high separation efficiency. Since the cyclone itself has no moving parts, its separation process is completely dependent on the flexible cooperation of its own structural parameters and external operating parameters to achieve the best separation accuracy, which is completely different from other coal preparation methods. salient features. [0003] During the separation process of the dense medium cyclone, the material and the suspension are fed into the cyclone at a certain pressure along the tangential direction to form a strong vortex flow; the liquid flow starts from the inlet and forms a descending spiral along the inner wall of the cyclone. Outer spiral f...

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Problems solved by technology

[0005] It can be seen from the above that in actual production, the suspension enters the cyclone along the tangential direction. Since the suspension contains a large number of particles, the particles will scrape the inner wall of the cyclone under pressure, and the inner wall will be damaged after long-term use. There is damage, which greatly reduces the service life of the cyclone; at the same time, the direction of the material spiral at the feed end of the existing cyclone is not easy to adjust, and it takes a lot of time to debug, which has a certain impact on the screening efficiency

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