A lignite drying and upgrading system

A technology for upgrading and lignite, applied in solid fuel, petroleum industry, fuel and other directions, can solve the problems of large heat consumption of drum structure, difficult sealing, large workload, etc., and achieve environmental protection, constant working temperature, high temperature easy-to-control effects
CN106047441BActive Publication Date: 2021-08-31QINGDAO SONGLING POWER ENVIRONMENTAL EQUIP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO SONGLING POWER ENVIRONMENTAL EQUIP
Publication Date
2021-08-31

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Abstract

The invention relates to a lignite drying and upgrading system, which includes four silos with heat exchange function and a heat exchange device that can provide heat exchange medium to the four silos for heat exchange; the four silos have medium inlets and Medium outlet, the medium inlet and medium outlet of the four silos are respectively connected to the medium flow switching control pipeline, and the flow of the heat exchange medium in the four silos can be changed by opening or closing the corresponding switching valve on the medium flow switching control pipeline. flow direction, so that the four silos can be switched among the four silo functions of preheating silo, drying silo, upgrading silo, and unloading silo to perform one of the silo functions respectively, and the heat exchange medium is After the compartment is isolated, it flows in the order of upgrading compartment-drying compartment-preheating compartment and returns to the heat exchange device. The invention has the advantages of simple manufacture, low requirements, easy control of the drying and upgrading process, energy circulation, greatly reduced energy consumption, and a sealed structure to ensure safe operation during the drying process, which is beneficial to environmental protection.
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Description

technical field

[0001] The invention belongs to the technical field of lignite drying and upgrading, and in particular relates to a lignite drying and upgrading system. Background technique

[0002] Lignite is a kind of coal with a large content in my country and in the world. It is characterized by a short formation time, low coalification degree, high moisture content, high volatile matter content, easy weathering and spontaneous combustion, and relatively low calorific value such as bituminous coal. Lignite The characteristics of use at this stage are like chicken ribs, and the degree of use is very low. my country's lignite reserves are large, about 200 billion tons or more. With the change of my country's energy structure, the utilization ratio of lignite will be higher and higher in the future. However, according to the characteristics of high moisture content of lignite, direct combustion or blending of boilers will waste a lot of energy, and it is easy to spontaneou...

Claims

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