Microwave drying upgrading equipment for low-rank coal

Abstract

The invention belongs to the technical field of coal upgrading and particularly relates to microwave drying upgrading equipment for low-rank coal. The microwave drying upgrading equipment comprises a microwave drying chamber, a microwave generator, microwave radiators, a pneumatic device and a support device, wherein the support device is mounted below the microwave drying chamber; the microwave generator and an exhaust port are mounted at the upper part of the microwave drying chamber; the microwave generator is connected with the microwave radiators; the microwave radiators are mounted at the inner top of the microwave drying chamber; the exhaust port is connected with a purifying and recycling device; a feed opening and a discharge opening are formed in two ends of the microwave drying chamber respectively; and a sloping slideway is arranged at the bottom of the microwave drying chamber. According to the microwave drying upgrading equipment, low-rank coal in the microwave drying chamber is dried and subjected to removal of sulfur, magnesium and other substances by a microwave heating technology, the energy consumption is low, the desulphurization efficiency is high, drying is complete, the heat efficiency is high, and treated coal slides under the action of gravity from an inlet end to an outlet end along the sloping slideway. A traditional conveying mechanism is omitted in the technology so that the manufacturing cost and running cost are reduced, and the microwave drying upgrading equipment is simple, efficient and reliable low-rank coal drying upgrading equipment.

Description

technical field [0001] The invention relates to microwave drying and upgrading equipment for low-quality coal, belonging to the technical field of coal quality upgrading. Background technique [0002] my country is a country with relatively rich coal resources. For a long time, my country's coal mining and utilization have been dominated by bituminous coal and anthracite. However, with the rapid development of the economy, energy consumption has been rising steadily, and coal reserves have also been greatly reduced. For my country It is imminent to improve the utilization rate of low-rank coal such as lignite which was regarded as waste in the past. [0003] The so-called low-rank coal refers to low metamorphism, younger coal. It mainly includes lignite, non-caking coal, long-flame coal, weak caking coal and other coal types. Its main characteristics are high moisture content (20% - 60%) and low calorific value (1000 - 3500Kcal / kg), which is very important for low Utilizati...

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Problems solved by technology

[0009] The above drying processes generally have problems such as high energy consumption, complicated process, small processing capacity, poor drying effect, easy moisture absorption of low-rank coal after drying, easy combustion and explosion in the drying process, and serious pollution.

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