PLANT FOR PROCESSING OF ASH-SLAG WASTES Russian patent published in 2020 - IPC B03B9/04 

FIELD: power engineering.

SUBSTANCE: disclosed invention relates to power engineering, specifically to plant for processing ash from dumps of thermal power plants. Plant for processing ash-slag wastes comprises a device for separation of ash-slag pulp by fractions and size, device for classification of ash-slag particles and facility for dehydration of obtained products. Plant comprises a water tank, connected by pipeline with device for separation of ash-and-slag pulp by fractions and size, which is a vibration screen, for sequential passage through ash-and-slag pulp screens and separation of slag crushed stone, slag sand. Lower screen is connected to vessel equipped with device for mixing, which outlet is connected to sand pump for pumping of pulp via pipeline to input of first hydraulic cyclone of device for classification of ash-slag particles, consisting of hydrocyclones system and vibrotray. First hydrocyclone provides separation of pulp into ash component and sand fraction, its lower conical part is connected by pipeline for removal of pulp sand fraction from it, consisting mainly of microspheres and coal underburning particles, and their supply to the second hydrocyclone for cleaning and additional separation of ash component. Upper parts of the first and the second hydro cyclones are connected by pipelines to the inlet of the third hydrocyclone providing separation of the ash component from water. Outlet of the third hydrocyclone is connected to a filter bag arranged in the product dehydration facility and made in the form of a centrifuge. Output of the second hydrocyclone is connected to a vibratory chute, providing separation of sand fraction into two layers - upper layer, consisting of coal underburning, and lower, consisting of microspheres entering into filter bags, located in centrifuge for squeezing produced products.

EFFECT: higher efficiency of recycling ash-slag wastes, as well as reduction of environmental pollution.

1 cl, 1 dwg