Heavy medium coal preparation control equipment, density control system thereof and density control method

Abstract

The invention discloses a density control system of heavy medium coal preparation control equipment. The heavy medium coal preparation control equipment comprises a medium barrel (26) and separation equipment, wherein the medium barrel (26) and the separation equipment are communicated by a pipe (24). The density control system comprises a detection device (21), a control device (21) and a regulation valve (23), wherein the regulation valve (23) is communicated with a water source (28) and a pipe (24); the detection device (21) detects the density of suspension in the pipe (24) between the regulation valve (23) and the separation equipment; the control device (22) receives a detected density signal and compares a detected density with a preset density; when the detected density is smallerthan the preset density, the opening of the regulation valve (23) is controlled to reduce; when the detected density is equal to the preset density, the opening of the regulation valve (23) is controlled to be constant; and when the detected density is greater than the preset density, the opening of the regulation value (23) is controlled to increase. The density control system can reduce power consumption and production cost and can ensure the quality stability of a screen out concentrate coal product. The invention also discloses the heavy medium coal preparation control equipment and a density control method.

Description

technical field [0001] The invention relates to the field of coal preparation, in particular to a density control system for dense medium coal preparation control equipment. The present invention also relates to a dense medium coal preparation control device including the density control system and a dense medium coal preparation method. Background technique [0002] With the rapid development of my country's national economy, energy consumption is increasing rapidly. As the main energy source in my country, the consumption of coal is also increasing. [0003] In order to improve the utilization efficiency of coal and reduce the pollution to the environment, my country is implementing the "Clean Coal Technology Plan". Coal preparation is the basis of clean coal technology. It fundamentally improves the quality of coal products, improves the utilization efficiency of coal and reduces pollution to the atmosphere and the environment. At the same time, it can also significantly...

AI Technical Summary

Problems solved by technology

[0023] However, since the concentrated medium suspension is prone to sedimentation in the production system, in order to prevent the concentrated medium suspension from settling in the production pipeline and container (concentrated medium barrel) and ensure the stability of the suspension, pumps must be used continuously during the production process. Circulation, which increases the wear and tear of equipment and pipelines, resulting in increased power consumption and increased production costs; When entering the partial flow rate of the qualified medium tank, it will take a long time for the concentrated medium suspension and the qualified medium suspension to mix evenly, resulting in a lag in the density adjustment of the suspension in the qualified medium tank and the detection at the next moment. Inaccuracy, when it is serious, will also cause overshoot, which makes the density of the suspension in the qualified medium barrel change greatly, and the adjustment accuracy and stability of the system are poor, resulting in the instability of the quality of the sorted clean coal product

Images