Multi-layer drum sieve, screening system and application thereof

Abstract

The invention provides a multi-layer drum sieve, a screening system and an application thereof, and relates to the technical field of drum sieve sieving. The multi-layer drum sieve comprises rack bodies and a plurality of same drum screens, wherein the rack bodies are of multi-layer structures; rotary shafts of drum screens are arranged on the rack bodies at each layer; the drum screens are axially parallel to one another and are vertically arranged; each drum screen comprises a first drum screen and a second drum screen, end parts of which are connected, the mesh size of the first drum screen is smaller than that of the second drum screen; a charge hole and a discharge hole are separately formed in the head and the tail of each drum screen; a discharge inclined plate is arranged on the bottom of each drum screen; and materials are collected though a discharge pipeline. The multi-layer drum sieve provided by the invention solves the technical problems that a conventional drum sieve in low in sieving efficiency, is inaccurate in grading and is inconvenient to replace the screens; the drum screens are vertically arranged and placed, so that materials are sieved on a large scale once, and therefore, production efficiency is improved; and materials of different particle diameters can be effectively screened, and the screens are convenient to replace.

Description

technical field [0001] The invention relates to the technical field of cylindrical sieve screening, in particular to a multi-layer cylindrical sieve, a screening system and applications thereof. Background technique [0002] Cylindrical screen is a screening machine that achieves screening by rotating. When working, the material is fed from one end of the cylinder, the fine-grade material passes through the sieve holes on the cylindrical working surface, and the coarse-grained material is discharged from the other end of the cylinder. . The rotating speed of the cylinder screen is very low, the work is stable, and the power balance is good. [0003] In the production of ceramsite proppant, cylinder sieves can be used to sieve products with required particle size. With the continuous expansion of the production scale of ceramsite proppant and the increase of product specifications, the current cylinder sieve can no longer meet the requirements. [0004] The cylindrical scre...

AI Technical Summary

Problems solved by technology

[0005] 1. The work efficiency is low. Due to the limited space in the screen cylinder, the amount of material screened at one time is limited, and the efficiency is low, which cannot meet the production requirements of large-scale screening.

[0006] 2. The particle classification is inaccurate. The use of a single-aperture sieve can only obtain coarse-grained materials larger than the sieve aperture and fine-grained materials smaller than the sieve aperture. The product cannot be further classified, and some current cylinders The sieve is composed of inner and outer multi-layer screens. Although products with different particle sizes can be further obtained, it is inconvenient to maintain and replace the screen with this inner and outer structure, which is time-consuming and laborious.

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