Horizontal type rotary dryer

Abstract

The invention discloses a horizontal type rotary dryer which comprises an outer roller (1) and a charging tube, and further comprises a central roller (2), the charging tube is mounted at an inlet end of the outer roller; the outer diameter of the central roller is smaller than the inner diameter of the outer roller; the central roller is axially sleeved by the outer roller, and can rotate along with the outer roller; and heating gas and a to-be-dried material guided in through the charging tube can enter a position between the outer roller and the central roller, and enter the central roller. Besides, thermal-insulation cotton preferably covers the peripheral part of the outer roller for reinforcing the thermal insulation effect, so that energy consumption is saved. The central roller is additionally arranged in the horizontal type rotary dryer, so that in a drying process, a radial dropping space of the dried material is reduced, and a damage rate is effectively reduced especially for a carbon material and the like which are liable to damage. Dried products with a higher qualification rate can be produced, so that the drying yield can be increased, coal consumption is reduced, and the purpose of saving energy and increasing efficiency is achieved.

Description

technical field [0001] The invention belongs to the field of drying equipment, and in particular relates to a rotary dryer for drying carbon materials. Background technique [0002] The carbon material used in the production of calcium carbide (referred to as "carbon material") often has a high breakage rate and produces a large amount of powder during the drying process, resulting in a high consumption of carbon material. Specifically, the carbon material is generally dried by a horizontal rotary dryer. The carbon material rotates continuously with the cylinder in the drum, and the repeated falling process during the period causes continuous damage to the carbon material. The powder produced during the drying process usually reaches 18 %, resulting in low effective utilization of carbon materials, which in turn seriously affects the production cost of calcium carbide. [0003] Therefore, how to reduce the intermediate powder rate of carbon materials is imperative for energ...

AI Technical Summary

Problems solved by technology

In addition, with the steady increase in the load of calcium carbide furnaces, the demand for carbon materials is gradually increasing, and new requirements are put forward for the output of carbon material drying. The increase in output will increase the coal consumption accordingly. Therefore, how to improve the drying output, and reducing coal consumption has become another problem that needs to be tackled in the production process

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