Coal slime non-quantification process for classifying and selecting viscous and wet power coal

Abstract

The invention belongs to the technical field of power coal separation and coal slime non-quantification, and discloses a coal slime non-quantification process for classifying and selecting viscous and wet power coal. The system comprises a raw coal screening and grading module, a lump coal separation module, a slack coal deep powder removal module, a slack coal separation module, a coal slime dehydration module, a drying module and a blending module which are arranged in the coal flow direction. The method can effectively realize grading separation of lump coal and slack coal, improves the raw coal separation rate and separation precision, reduces the separation lower limit, and improves the clean coal yield. The problem that sticky and wet fine coal adheres to the inner wall of the coal bunker, and consequently the coal bunker catches fire is solved. The economic value of the coal slime product is greatly improved, coal slime emission is not quantized, the economic benefit of a coal preparation plant is maximized, and environmental protection, energy conservation and emission reduction are facilitated.

Description

technical field [0001] The patent of the invention belongs to the technical field of steam coal separation and coal slime non-quantification, and specifically relates to a coal slime non-quantification process for viscous-wet steam coal classification and selection. Background technique [0002] Coal is an important primary energy source in my country and plays an important role in the development of the national economy. Coal sorting is the key link to realize the clean and efficient utilization of coal, which is of great significance to energy saving, emission reduction and environmental protection. [0003] At present, thermal coal preparation plants mostly use 13mm or 6mm classification, > 6 (13) mm raw coal is sorted through a shallow tank dense medium separator, < 6 mm raw coal is directly sold as a product, and the coal slime is sold directly after dehydration, resulting in raw coal Low selection rate, poor sorting accuracy, high sorting lower limit, low clean ...

AI Technical Summary

Problems solved by technology

[0003] At present, thermal coal preparation plants mostly use 13mm or 6mm classification, > 6 (13) mm raw coal is sorted through a shallow tank dense medium separator, < 6 mm raw coal is directly sold as a product, and the coal slime is sold directly after dehydration, resulting in raw coal Low selection rate, poor sorting accuracy, high sorting lower limit, low clean coal yield, high coal slime moisture, low calorific value and environmental pollution

When the moisture content of the raw coal is high, the sticky and wet fine-grained coal is easy to adhere to the inner wall of the coal bunker, causing the coal bunker to catch fire and causing great economic losses to the coal preparation plant

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