Elutriator

Abstract

The invention provides an elutriator. The elutriator comprises an outer cylinder, a particle inlet, a particle outlet, a particle inlet channel pipe, a flow guide inner component, a cleaning box body,a first gas inlet pipe, a second gas inlet pipe and a powder gas outlet, wherein the particle inlet and the particle outlet are formed in the top and the bottom of the outer cylinder respectively; the particle inlet channel pipe, the flow guide inner component and the cleaning box body are arranged sequentially at intervals in the outer cylinder from top to bottom; the flow guide inner componentcomprises a first diameter expanding section, a vertical section and a second diameter expanding section which are fixedly arranged in sequence from top to bottom; the cleaning box body comprises a cleaning plate, a cylindrical box wall and a gas guide plate which are sequentially fixed from top to bottom; the second gas inlet pipe penetrates through the outer cylinder, and an outlet of the secondgas inlet pipe faces upwards and is arranged under the gas guide plate; the first gas inlet pipe penetrates through the outer cylinder and is connected to the cylindrical box wall; the powder gas outlet is formed in the position, corresponding to the middle of the particle inlet channel pipe, of the outer cylinder; and the lower end diameter of the cleaning plate is greater than the upper end diameter of the first diameter expanding section, the upper end diameter of the first diameter expanding section is greater than the lower end diameter of the second diameter expanding section, the lowerend diameter of the second diameter expanding section is greater than the diameter of the vertical section, and the diameter of the vertical section is greater than or equal to the diameter of the particle inlet channel pipe.

Description

technical field [0001] The invention relates to the field of powder engineering, in particular to an elutriator. Background technique [0002] In the production process involving granular materials, in view of the physical properties of the particles themselves, especially brittle and fragile particles, in the process of pneumatic conveying and transportation, after the particles collide and rub against the wall of the device or pipe, it is easy to produce wire drawing and powder , if the powder is not removed, the particles will easily produce bubbles, spots, etc. during the later injection molding process, which will affect the product quality. In order to remove the powder in the finished granules in the industrial production process, an elutriator is often used to remove the powder before the granules enter the packaging silo. [0003] The particle size range of the powder produced by friction or collision during the transportation of particles is large. At the same tim...

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Problems solved by technology

[0003] The particle size range of the powder produced by friction or collision during the transportation of the particles is large, and the powder will adhere to the surface of the particles due to the static electricity generated by the friction of the particles, which is not easy to remove

For the elutriators mentioned in Chinese patents CN 1050186032 B, CN 202224355U, CN 206485999 U, and CN 201030332 Y, in the process of equipment structure design, only one-step convective separation is performed between particles and powder, the residence time is short, and no With a static elimination design, there is no mention of the removal efficiency of easily adhering powders and powders under different particle sizes

For the aforementioned problems, there is no good solution

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