Three-return-stroke drying drum, system and method

Abstract

The invention relates to the technical field of an engineering machine, and particularly relates to a three-return-stroke drying drum, system and method. The three-return-stroke drying drum comprises a drum body and a control device, wherein a feeding opening and a discharging opening are arranged on the drum body; an outer drum body, a middle drum body and an inner drum body are arranged inside the drum body; an induced air de-dusting device communicated with the outer drum body is arranged at one end of the feeding opening of the drum body; an air inlet communicated with the outer drum body is arranged at one end of the discharging opening of the drum body; and the control device is connected with and controls the induced air de-dusting device and the air inlet. A raw material of sand is dried at a high temperature through the inner drum body and the middle drum body of the drum body; high-temperature gas is discharged through the induced air de-dusting device at one end of the feeding opening of the drum body; cool air is sucked in through the air inlet; and the raw material of the sand dried at the high temperature is cooled, so that the temperature of the raw material of the sand discharged through the discharging opening is greatly reduced, and the raw material of the sand is prevented from being dewed when being cooled in a sand chamber.

Description

technical field [0001] The invention relates to a three-pass drying drum, a three-pass drying system and a method. Background technique [0002] At present, as a new type of environmentally friendly green building material, dry-mixed mortar has the advantages of stable quality, high efficiency, energy saving and environmental protection, meeting special needs, and easy to mechanized construction. It has developed rapidly in recent years. The raw material sand for dry-mixed mortar production has a high moisture content and cannot be directly used for production. Therefore, it needs to be dried to reduce the moisture content to meet the production requirements. [0003] At present, the raw sand is generally dried by the wet sand drying system of the dry-mix mortar mixing station. The wet sand drying system of the dry-mixed mortar mixing station mainly includes: boiling furnace, wet sand feeding pipe, three-pass drying drum, induced air dust removal device, discharge port, si...

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Problems solved by technology

[0006] In view of this, the present invention aims to propose a three-pass drying drum, a three-pass drying system and method, to solve the problem of high discharge temperature during the operation of the three-pass drying system, resulting in high moisture content of raw sand and easy formation of dry sand. block problem

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