Method for improving landfilling and crushing efficiency of fly ash from thermal power plant

Abstract

The invention discloses a method for improving the landfilling and crushing efficiency of fly ash from a thermal power plant. The method overcomes the problems of ash jams and low compacting efficiency in conventional landfilling and crushing of fly ash. The method comprises the following steps: before delivery of fly ash from the thermal power plant, adding water into the fly ash, and carrying out stirring to realize humidification of the fly ash, wherein the water content of the fly ash which is humidified and loaded into a truck is 32%; then transporting the fly ash to a landfill and allowing the water content of the fly ash to be 30% during spreading and rolling; performing rolling by using a vibratory roller with a weight of 12 tons, wherein the paving and filling thickness of each layer of the fly ash is 300 mm; performing rolling in the manner of flat rolling once, then vibrating rolling three times and flat rolling once more so as to allow a landfill layer of the fly ash to have dry density of 1.13 g / cm<3> after compaction. The method of the invention improves rolling efficiency and reduces rolling operation cost.

Description

Technical field [0001] The invention relates to a method for landfilling coal ash from a thermal power plant in a landfill, in particular to a method for adjusting the humidity of dry fly ash from a thermal power plant in the power plant and performing efficient landfill rolling in the landfill Methods. Background technique [0002] Fly ash is the product of high-temperature combustion, also known as fly ash. It is a powdery substance with very fine particles that can flow in the air. The particle diameter is a few microns to hundreds of microns, usually spherical particles, with a large specific surface area and water absorption performance. Good, easily disturbed, not easy to compact. Except for the comprehensive utilization part, the fly ash produced by thermal power plants is mainly treated by landfill. Generally, the fly ash after humidity control is transported to a special landfill, where it is landfilled by layering and rolling. Before leaving the factory, fly ash must...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for improving the efficiency of landfill and compaction of fly ash in thermal power plants, and solves the technical problem of low ash and compaction efficiency in the landfill and compaction of fly ash