Low-resistance and high-efficiency powder concentrator

Abstract

The invention discloses a low-resistance and high-efficient powder concentrator which is a novel low-resistance and high-efficiency powder concentrator that is formed by scientifically combining two classification mechanisms together according to vortex classification and inertia centrifugal classification principles on the basis of comprehensively absorbing a classification principle of a third-generation high-efficient powder concentrator in the world and further carrying out improvement and development. The invention has high powder-concentration efficiency, reliable rotor seal, simple structure, small device size, light weight and flexible arrangement, can improve the yield of a mill by a large margin, does not need large-size castings or machining and is convenient for mounting and maintaining.

Description

Technical field: [0001] The invention relates to the field of mechanical equipment, specifically a low-resistance and high-efficiency powder separator, which is a powder and particle classifying equipment for building materials, cement industry, chemical industry, metallurgical industry, electric power industry, non-metallic mines and other industries. Background technique: [0002] With the development of new dry process cement production technology and the further improvement of cement performance requirements in the construction industry, cement closed-circuit circulation grinding system is favored by cement production enterprises more and more. The powder separator is one of the hosts of cement closed-circuit circulation system. , The performance of the powder separator has a great influence on the cement closed circuit system, and the result of the powder selection directly affects the performance of the cement. At present, the third-generation O-SEPA or imitation O-SEP...

AI Technical Summary

Problems solved by technology

However, in order to ensure the ventilation area between the guide vanes, its thickness cannot be increased without limit, resulting in the deterioration of the rigidity of the guide vanes after the size of the powder classifier is enlarged. Under the impact of the air flow, the guide vanes are prone to vibration and deformation, and the middle part of the vanes trembles. phenomenon, affecting the stability of the graded flow field

[0005] (3) The powder separator that is widely used in China is restricted by the mechanical structure, and the number of powder inlets cannot be increased without limit. The limited number of inlets leads to uneven distribution of the powder separator, which makes Powder selection efficiency is not high

The design structure of the tertiary air inlet device of the powder separator, after the system fan is turned on, because the tertiary air inlet device is vertical to the busbar of the coarse powder ash collection cone, the direction of the tertiary air entering from the air duct is also perpendicular to the coarse powder ash collection The cone busbar causes the tertiary air to be on the cone section, and there is no wind around the air duct to participate in the separation of coarse powder. Due to the existence of the selection dead zone, the sorting of the upper and lower materials is only partial sorting, and it is difficult to produce obvious sorting effects due to limited air volume and partial sorting.

[0006] (4) There are two main air inlets for the O-SEPA type or imitation O-SEPA type of the powder separator. The air intake of the primary air intake generally accounts for about 60% of the total air intake, and the air intake of the secondary air intake is about Accounting for 30% of the total air intake, the wind entering the air inlet goes along the volute of the powder classifier and enters the main powder selection area under the guidance of the guide vanes. The wind resistance is relatively large, and the resistance of the equipment is also relatively large. The power of the fan installed behind the powder classifier also increases accordingly, and the energy consumption is high, which is not conducive to energy saving.

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