Dense medium density control device for coal preparation plant and using method

Abstract

The invention belongs to the technical field of dense medium coal preparation, and particularly relates to a dense medium density control device for a coal preparation plant and a using method. The device comprises a control table, a PLC, a dense medium shallow slot sorting assembly and an execution assembly. The dense medium shallow slot sorting assembly comprises a raw coal classifying screen, a block shallow slot sorting machine, a slack coal treatment link, a qualified medium barrel, a qualified medium pump, a dilute medium barrel, a block clean coal fixed medium drainage screen, a clean coal medium drainage screen, a gangue medium drainage screen, a dense medium magnetic separator, a dense medium barrel and a dense medium pump. A flow dividing device comprises a main flow dividing pipeline, a safety butterfly valve, a secondary flow dividing pipeline, an auxiliary flow dividing pipeline, an auxiliary butterfly valve and a flow dividing valve. A density measuring device comprises a flow regulating valve, a density pump, a densimeter mounting pipeline and a densimeter. According to the device and the method, the density and the liquid level of the suspension in the qualified medium barrel are automatically controlled, the problems of low accuracy, large hysteresis and the like of manual control of the density of the suspension are solved, and the device is simple in structure, long in service life and high in adaptability.

Description

technical field [0001] The invention belongs to the technical field of dense medium coal preparation, and in particular relates to a dense medium density control device of a coal preparation plant and a use method thereof. Background technique [0002] As a primary energy source, coal resources play an important role in the process of my country's modern industrial development and are also an important pillar of my country's national economy. 80% of my country's coal resource reserves are distributed in North China and Northwest China, and 70% are consumed in East China and the southeast coastal areas. Most of the coal resources need long-distance transportation, and the remarkable characteristics of my country's coal resources are: more difficult-to-separate coal and more high-sulfur coal , Raw coal contains a large amount of impurities such as gangue, and direct transportation without washing will not only cause great waste of manpower and material resources, but also cause...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a dense medium density control device in a coal preparation plant, which realizes the automatic control of the suspension density and liquid level of qualified medium barrels in the dense medium shallow tank separation process, and solves the problem of low accuracy of traditional manual manual control of suspension density , large hysteresis, etc., and the control device has a simple structure, long working life, and strong adaptability, which can effectively improve the economic benefits of the coal preparation plant

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