(Composed of coal washing machine case, outer span bucket elevator, main water pump, discharge machine, Roots blower, high-pressure blower system, electro-pneumatic command cabinet, CNC air valve system)

　　Note: The table lists several specifications manufactured by our company, which can meet the different needs of large, medium, and small coal preparation plants and design various types of specifications.

　　Features and Working Principles

　　1 Control system: With PLC as the control core, operators can set parameters and operate control on the human-machine interface: control of the feeder, air valve system, discharge control, measurement system SKT series coal washing equipment is an internationally advanced and efficient washing equipment, with over ten specifications ranging from SKT 6 ㎡ to 30 ㎡, which can adapt to the washing requirements of different coal qualities. The processing capacity is 10-20t/㎡ h, with a selected particle size of 0-100mm and an imperfect degree; 0.16, with a sorting efficiency of over 96% SKT type coal washing equipment can automatically judge the coal quality, automatically detect and intelligently control reference values such as coal feeding, discharge, air volume, water volume, bed looseness, and clean coal ash content, maintaining stable sorting status and optimizing product quality

　　4 SKT coal washing equipment is a machine that separates light and heavy materials through the vertical pulsating motion of water

　　The air valve guides low-pressure air into and out of the air chamber under the screen at the selected frequency, causing the water inside the machine to form an upward and downward pulsating motion. The raw coal fed into the 1-2-3 section of the machine body from the feed is stratified by density under the action of the pulsating water flow. The gangue with high density gradually sinks and is distributed in the bottom layer, the middling coal with low density is distributed in the middle layer, and the cleaned coal with low density is distributed in the upper layer. Gangue is discharged at the end of section 1-2, and at the same time, a small portion of small-sized gangue is discharged through the sieve plate. The middling coal distributed at the bottom of the third section is discharged at the end of the third section, and a small part of middling coal with small particle size is discharged through the sieve opening of the sieve plate. And clean coal is distributed in the upper layer and overflows from the discharge end of the machine body. In this way, raw coal is separated into three products: gangue, middling coal and clean coal

　　5. Control Principle

　　Jigging coal selection involves controlling the four major parameters of "air, water, supply, and discharge". However, in actual production operations, after adjusting the "air and water", they no longer change (even fine adjustments can be made); In this way, the focus of control can be on the two major parameters of "feeding and discharging". The control of these two parameters varies with the changes in the quality characteristics of the washed raw coal. The coal feeding amount is adjusted according to the thickness of the first, second, and third heavy material layers of the coal washing equipment, forming an "automatic coal feeding according to the changes in the quality of the raw coal"; Combined with automatic discharge, it forms a dual control of coal feeding and discharge, stabilizing the thickness of the heavy material layer in the first, second, and third stages, ultimately maintaining stable clean coal ash content and output rate