A system for dry centrifugal granulation and waste heat recovery and utilization of liquid slag

Abstract

Disclosed is a dry type centrifugal granulation and waste heat recycling and utilization system for liquid molten slag, comprising a molten slag temporary storage and flow rate control module (1), a molten slag centrifugal granulation and waste heat recycling module (2), a molten slag moving bed heat exchange and waste heat recycling module (3), and a high-temperature air waste heat utilization module (4). The system comprises a water vapor procedure, an air procedure, an exhaust gas procedure and a slag procedure and the corresponding devices therefor. By means of the design of the aforementioned modules and the various medium procedures, the efficient granulation of the liquid molten slag and the efficient recycling and utilization of heat can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery of high-temperature liquid slag, and in particular relates to a system for dry centrifugal granulation of liquid slag and waste heat recovery and utilization. [0002] technical background [0003] In 2014, China's metallurgical industry consumed about 868 million tons of standard coal, accounting for 20.40% of the total industry energy consumption. The potential of slag waste heat resources in the metallurgical industry is huge. In 2016, the amount of liquid slag produced in my country was about 343 million tons, and the sensible heat contained in each ton of slag was equivalent to 60 kilograms of standard coal, equivalent to 20.58 million tons of standard coal. The output of steel slag and blast furnace slag is relatively high, respectively 105.04 million tons and 238.34 million tons, equivalent to 7.085 million tons of standard coal and 14.19 million tons of standard coal in waste he...

AI Technical Summary

Problems solved by technology

The treatment process of this method wastes a lot of water resources and produces SO 2 and H 2 S and other harmful gases cannot effectively recover the high-quality waste heat resources contained in high-temperature liquid slag.

The water quenching method not only wastes the high-quality waste heat resources contained in the high-temperature liquid slag, but also consumes a large amount of water resources and causes serious pollution to the environment. These treatment methods can no longer meet the urgent needs of energy conservation and emission reduction in the steel industry

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