Method and system for drying muddy material

Abstract

The invention discloses a method and a system for drying a muddy material. The principle of the method and the system is that: a wet material is pre-dried through a solar-powered drying device, and then dried through a drying device which takes a hot air furnace as a heat source. Exhaust gas of the drying device which takes the hot air furnace as the heat source is taken as an additional heat source of the solar-powered drying device so as to contribute to material drying in the solar-powered drying device. Solar energy and the residual heat of the exhaust gas are used for pre-drying the material, so that energy is saved and running cost is low. Pre-drying contributes to reducing the viscosity of the material, so that the disadvantages of easy feed inlet blocking, easy agglomeration in the drying device and low drying efficiency of the drying device which takes the hot air furnace as the heat source are overcome.

Description

Technical field: The invention relates to a drying method and system, in particular to a muddy material drying method and system. Background technique: Muddy materials include coal slime, tailings filter cake, flotation clean coal (mine), clay, sludge, etc. At present, the drying methods and systems of argillaceous materials mainly use hot blast stoves as the heat source, and mainly include drum drying or belt drying methods and systems. The principle of the rotary drum drying method and system is that the material is dried in the rotating cylinder and the hot air passing through the cylinder; the principle of the belt drying method and system is to put the material on the conveyor belt and place it in a tunnel with hot air flow Dry inside. The current drying methods and systems for muddy materials have the following problems: First, due to the high moisture content of the materials before drying, the use of a hot blast stove as a heat source leads to high drying costs, an...

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Problems solved by technology

The current drying methods and systems for muddy materials have the following problems: First, due to the high moisture content of the materials before drying, the use of a hot blast stove as a heat source leads to high drying costs, and sometimes the drying costs even exceed the selling price of the dried materials, which leads to A lot of muddy materials such as coal slime and sludge are directly dumped, causing serious local environmental pollution; second, muddy materials are generally relatively viscous and often block the feed inlet of the drying system, and are easy to dry in the drying system. Clumped together, low drying efficiency

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