Pipeline transportation method of coal

A pipeline transportation method of coal, the method comprises:

• pulverizing coal to obtain pulverized coal having a diameter of 500 μm or less;
• performing a waterproofing treatment on the pulverized coal;
• and
• transporting the waterproof pulverized coal to a destination, which comprising:
• pumping water into a pipeline until a constant flow rate of the water is reached;
• adding the waterproof pulverized coal into the pipeline, such that the waterproof pulverized coal can be transported by the water at a uniform rate;
• pressurizing a mixture of the waterproof pulverized coal and the water by a shear-free pump, or pressurizing the water only by a centrifugal pump after separating the waterproof pulverized coal from the water and then adding the separated waterproof pulverized coal back to the water;
• directing the mixture of the waterproof pulverized coal and the water into a static pool, so that the waterproof pulverized coal can float on the water surface and the water can be discharged;
• collecting the waterproof pulverized coal by a cyclone separator via a negative pressure collection method;
• and
• storing the collected waterproof pulverized coal in a warehouse at the destination,
• wherein a specific weight of a single particle of the waterproof pulverized coal is less than a specific weight of the water,
• wherein a time needed for precipitating the waterproof pulverized coal in water is longer than a time needed for transporting the waterproof pulverized coal to the destination.