Dense medium suspension density control system and control method thereof

Abstract

The invention provides a dense medium suspension density control system and a control method thereof, and belongs to the field of dense medium density control. The control system and the method aim tosolve the problems that in the prior art, the large-scale adjustment of the density of a composite medium barrel cannot be realized, the adjusting time is long, the adjustment is slow, and the adaptability is poor. The control system comprises a control terminal, a PLC and an executing device, wherein the control terminal is connected with the PLC through a network, the executing device comprisesa liquid level sensor, a flow dividing valve, a water supplementing valve, a water adding valve, a dense medium pump, a reverse flow dividing pump and a densimeter, the PLC is connected with all theexecution equipment, the liquid level sensor is arranged on the inner side wall of the composite medium barrel, the flow dividing valve is arranged on a pipeline between the composite medium barrel and a clean coal dilute medium barrel, the water supplementing valve is arranged on a pipeline between the composite medium barrel and a swirler, the water adding valve is arranged on a pipeline betweena water source and the composite medium barrel, an inlet of the dense medium pump is connected with a dense medium barrel, an outlet of the dense medium pump is connected with the composite medium barrel, the inlet of the reverse flow dividing pump is connected with the composite medium barrel, an outlet of the reverse flow dividing pump is connected with the dense medium barrel, and the densimeter is arranged on a pipeline between the composite medium barrel and the swirler.

Description

technical field [0001] The invention relates to the technical field of dense medium density control, in particular to a dense medium suspension density control system and a control method thereof. Background technique [0002] Most of the coal preparation plants adopt the gravity separation process, and the improvement of the gravity separation process plays a very important role in improving the economic benefits of the coal preparation plant. The key parameter density of the gravity separation process is to obtain the floating and sinking data of the raw coal through the floating and sinking test of the raw coal, and then draw the selectivity curve (H-R) of the raw coal, and then obtain the selected density according to the quality requirements of the clean coal. It can be concluded that the selected density is determined by the product quality and raw coal information. Due to the different sources of raw coal, the raw coal information is also very different, and the diff...

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Problems solved by technology

[0005] In order to solve the technical problems that the existing dense medium density control system and method cannot realize the large-scale adjustment of the density of the combined medium barrel, the adjustment time is long, the density adjustment is slow, and the adaptability is poor, the present invention provides a dense medium suspension density control system and its control method

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