Spiral mechanism for horizontal centrifugal machine

Abstract

A horizontal centrifugal spiral machine comprises the spiral cylinder with over one leaking holes on the wall and the spiral vane, feeding mouth of the centrifugal corresponding to the spiral cylinder having at least two symmetrical material outlet, each connected to an independent channel and formed into the spiral feeding cavity structure, each channel connected with the said cavity, with outlet of the independent channel having bigger arc angle, the radius being one third or one half of the spiral cylinder diameter, with reduced friction and collision, and damage to the separation, being able to extend the durability of the machine, improved in working efficiency and reduced in maintenance cost.

Description

technical field [0001] The invention relates to a screw mechanism of a decanter centrifuge, especially suitable for a decanter centrifuge with a large aspect ratio. Background technique [0002] The decanter centrifuge is a horizontal screw discharge decanter centrifuge. At present, it has been widely used in municipal sludge dewatering, water plant sludge dewatering, industrial and agricultural wastewater treatment, solid-liquid separation and dehydration in chemical, food, pharmaceutical and other industries. For decanter centrifuges, the longer the settling zone, the greater the aspect ratio, the better the separation effect, but the greater the shaft power; in actual use, decanter centrifuges with different length-to-diameter ratios will be selected according to different media properties, but When a decanter centrifuge with a large length-to-diameter ratio handles materials with a large flow rate or a large specific gravity, the material often flows back from the gap be...

AI Technical Summary

Problems solved by technology

For decanter centrifuges, the longer the settling zone, the greater the aspect ratio, the better the separation effect, but the greater the shaft power; in actual use, decanter centrifuges with different length-to-diameter ratios will be selected according to different media properties, but When a decanter centrifuge with a large length-to-diameter ratio handles materials with a large flow rate or a large specific gravity, the material often flows back from the gap between the feed pipe and the screw feed chamber during the feeding process, making the solid state of the material Particles continue to accumulate during long-term operation, and finally cause friction and collision between the screw and the feed pipe, resulting in abnormal shutdown

The speed of the decanter centrifuge with large length-to-diameter ratio is relatively high, and the impact of the material on the discharge port of the spiral is relatively large. Long-term operation will cause wear of the discharge port of the spiral, and the hard wear-resistant device needs to be replaced regularly

In addition, when the large aspect ratio decanter centrifuge is running at high speed, once the material enters the drum settling section, the solid and liquid two phases will be separated rapidly, but the material is still entering the drum settling section; For ordinary spirals, under the action of centrifugal force, the material in the feeding chamber directly enters the layered solid and liquid phases, and the solid and liquid phases that have previously settled are mixed together again, so that the sedimentation separation effect reduce

Images