Cyclone melting device and method for fly ash preheating

Abstract

The invention discloses a cyclone melting device and a cyclone melting method for fly ash preheating, particularly relates to a device and a method for fly ash melting treatment. The device comprises a cyclone furnace and a fly ash preheater, wherein a smoke outlet of the cyclone furnace is connected with a hot smoke inlet of the fly ash preheater, and a working medium outlet of the fly ash preheater is communicated with a secondary air tangential inlet of the cyclone furnace. The method comprises the steps as follows: mixing the primary air with coal powders; spraying into the front end of the cyclone furnace from a primary air inlet of the cyclone furnace; carrying fly ashes into the fly ash preheater through the secondary air for the combustion of the coal powders through adopting the pneumatic transmission technology, enabling high-temperature smoke generated by combustion in the cyclone furnace to enter the fly ash preheater for heating the secondary air and the fly ashes, enabling the fly ashes after heated through the high-temperature smoke to enter the cyclone furnace, quickly heating the fly ashes to reach the fly ash melting temperature, rotating the secondary air in the cyclone furnace at a high speed, throwing the fly ashes to the wall surface of the cyclone surface under the action of a centrifugal force, quickly melting the fly ashes through the high-temperature wall surface, and discharging the molten fly ashes in the form of liquid slags from a liquid deslagging hole at the bottom of the cyclone furnace.

Description

technical field [0001] The invention relates to a device and method for melting and processing fly ash, belonging to the technical field of safe processing of fly ash. Background technique [0002] With the rapid development of the national economy, the urbanization process is accelerating, and the amount of domestic waste is increasing sharply. Waste incineration power generation can better achieve the goals of waste reduction, resource utilization, and harmless treatment. In developed countries and my country widely promoted and applied. However, the fly ash produced by the incineration of domestic waste contains high concentrations of dioxins and a large amount of heavy metals and other harmful substances, and has a high leaching rate, which is a hazardous waste. If it is discharged directly without treatment, it will pollute the soil and groundwater. It is bound to cause serious secondary pollution. [0003] At present, cement solidification landfill or high-temperature...

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Problems solved by technology

[0005]Technical problem: The present invention aims at the large amount of auxiliary fuel consumption in the fly ash melting process of the cyclone furnace, high requirements on the quality of the auxiliary fuel, and the slag collection rate of the fly ash melting Low-level problems, the present invention proposes a cyclone melting device and method for fly ash preheating, the method has the effect of economy, high efficiency and safety

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