Drum screen with protecting cover and two kinds of screen meshes

Abstract

The invention relates to a chemical fertilizer production device, in particular to a drum screen with a protecting cover and two kinds of screen meshes. The drum screen comprises a support, a motor, a coupler, a screen shaft, a screen body, supporting frames and the protecting cover, wherein the motor is arranged on the support, the two ends of the screen shaft are connected with the support through bearings, the screen body is connected with the screen shaft through the supporting frames, the motor is connected with the screen shaft through the coupler, the screen body comprises a first screen mesh part and a second screen mesh part with the mesh openings larger than the mesh openings of the first screen mesh part, one side of the protecting cover is fixedly connected with the support, and the other side of the protecting cover is detachably connected with the support. The drum screen is provided with the two kinds of screen meshes with the mesh openings, so that the situation that the mesh openings are blocked is prevented; the upper portion of the drum screen is provided with the protecting cover, so that it is prevented that many fertilizer particles are thrown out when the drum screen works, and the work quality and efficiency of the drum screen are improved.

Description

technical field [0001] The invention relates to a fertilizer production equipment, in particular to a trommel screen with two screens of a protective cover. Background technique [0002] In the production of compound fertilizers, sorting fertilizer granules is an essential step before packaging finished products. The uniformity of fertilizer granules is an important indicator to measure the quality of fertilizers. Due to the certain viscosity of compound fertilizer granules, existing In the technology, in order to prevent the screen from clogging, the front screen mesh is larger than the rear screen mesh, and the larger particles are preferentially screened out to prevent the blockage of the screen from affecting the work of the rear screen. Particles are screened out together, and the particles screened out by the front screen need to be screened again, which reduces the production efficiency. In addition, most of the trommel screens in the prior art work in an open envir...

AI Technical Summary

Problems solved by technology

[0002] In the production of compound fertilizers, sorting fertilizer granules is an essential step before packaging the finished product. The uniformity of fertilizer granules is a measure of the quality of fertilizers. Because the compound fertilizer particles have a certain viscosity, in the prior art, in order to prevent the screen from clogging, the screen mesh in the front section is larger than the screen mesh in the rear section, and the larger particles are preferentially screened out to prevent the screen from clogging. Affects the work of the rear screen, but often sieves out the particles with a qualified size, and needs to re-screen the particles screened out of the front screen, which reduces the production efficiency. In addition, most of the existing trommel screens are working. In an open environment, because the rotating speed of the trommel screen is very fast, the materials in the screen are often thrown out of the screen with the rotation of the screen. processing increases production costs and reduces production efficiency. Therefore, in order to reduce production costs and improve production efficiency, it is of great significance to provide a trommel screen with two screens for protective covers

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