Drying system integrating heating with drying

Abstract

The invention discloses a drying system integrating heating with drying. The drying system comprises a furnace body, a feeding device used for adding materials into the furnace body, a material collecting device used for collecting dried materials in the furnace body, an air feeding device used for introducing outside hot gas into the furnace body through a first gas inlet, and a stirring device used for stirring and crushing the materials, wherein the stirring device comprises a second rotary shaft; the second rotary shaft is arranged in a cavity of the furnace body in a penetration mode, and is provided with a gas ventilating cavity; a plurality of gas vents are formed in the gas ventilating cavity; the gas spraying direction of the gas vents is not superposed with and is not parallel to the stirring direction of the stirring shaft and the stirring direction of blades; during material drying, the hot gas is introduced into the cavity of the furnace body through the first gas vents; the second rotary shaft drives a stirring assembly on the second rotary shaft to continuously stir materials in a radial direction and in an axial direction of the second rotary shaft, so that the materials can turn over in the axial direction and in the radial direction of the second rotary shaft in the furnace body, and therefore, the convection and heat exchange area of the materials and the hot gas is increased.

Description

technical field [0001] The invention relates to the technical field of heating and drying, in particular to a drying system. Background technique [0002] Sludge is the product of the sewage treatment process, which contains a large amount of organic matter, heavy metals and molds, etc. If no follow-up treatment is added, it will cause serious pollution to the environment. Therefore, it is often necessary to concentrate and dehydrate the sludge, but after this treatment The moisture content of the final sludge is usually above 70%, and the sludge needs to be further dried. [0003] In the prior art, the drying system used for sludge drying is mostly structured as the drying system disclosed in the Chinese patent document CN201058838Y, including a furnace body, a feeder connected to the feed port of the furnace body, and an air outlet of the furnace body. Connected spray tower. Among them, the furnace body includes a transmission shaft arranged in the furnace body, a number...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low drying efficiency, poor drying effect and complex structure of the drying system in the prior art, so as to provide a drying device that can improve drying efficiency, improve drying effect and have a simple structure

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