METHOD FOR CLEANING GASES FROM DUST Russian patent published in 2021 - IPC B01D47/06 B04C5/23 

FIELD: gas purification systems.

SUBSTANCE: invention relates to the technology of cleaning gases from dust in the heat power industry, ferrous and non-ferrous metallurgy. The method for cleaning gases from dust consists in introducing the gas to be cleaned into a cyclone with an upper axial exhaust pipe. Next, the gas is cleaned from dust in the cylindrical body due to the action of centrifugal forces during the translational movement of the rotating flow from top to bottom in the cylindrical body by turning the purified flow upwards. The collection of the captured dust flow in the dust collector is performed. The supply of auxiliary coagulating liquid to the cyclone is organized, oriented to the flow of captured dust, with the formation of a mixture of captured dust and auxiliary coagulating liquid. The mixture is briquetted on a roller press installed in the lower part of the cyclone body. A flow of briquettes is formed in the above-bunker space, after which the briquettes are loaded into a collecting hopper. The rotating flow of the purified gas is cooled using a heat exchanger that generates water vapor supplied to the above-bunker space. The gas to be cleaned is additionally cooled using a cooler adjacent to the outer surface of the exhaust pipe. Between the cooler and the heat exchanger, the circulation of the coolant is organized by installing circulation pipes. The heat exchanger is equipped with a collecting drum: a water vapor storage tank. The circulation of the coolant is organized forcibly by installing an external pipeline with a circulation pump connecting the storage drum with the lower part of the heat exchanger. A heat-insulated air heater generating heated air is installed on the section of the external pipeline between the storage drum and the circulation pump. The heated air is fed into the above-bunker space through a heat-insulated air pipeline with a flow rate of 0.2-2.5 m³/kg of briquettes.

EFFECT: invention provides an increase in the efficiency of gas purification from dust by 0.5-2.6% (abs.), the strength of dust-sludge briquettes by 5-14 kPa (abs.) and the drying efficiency of briquettes by 2-7% (abs.).

1 cl, 1 dwg, 1 tbl