Metallurgical slag waste heat recovery equipment and method

Abstract

The invention discloses metallurgical slag waste heat recovery equipment and a method. The metallurgical slag waste heat recovery equipment comprises a granulation primary-cooling system module and a moving bed heat exchange system module, wherein the granulation primary-cooling system module comprises a metallurgical slag tank, a hopper feeder, a granulation wheel, an atomizer and a granulation primary-cooling box body; the moving bed heat exchange system module comprises a slag storage bin, a moving bed heat exchanger and a slag discharge wheel; high-temperature molten metallurgical slag is fed to the granulation wheel through the hopper feeder from the metallurgical slag tank from top to bottom, is crushed through the granulation wheel and flies out in the tangential direction, the metallurgical slag is in contact with cooling water mist provided by the atomizer in the flying process and subjected to water quenching to generate surface-cured metallurgical slag particles and water vapor, the metallurgical slag particles enter the slag storage bin and the water vapor is discharged out; and the metallurgical slag particles in the slag storage bin are constantly supplied to the moving bed heat exchanger, the moving bed heat exchanger is provided with a shell and a pipeline, the metallurgical slag particles move in the shell from top to bottom, the pipeline is arranged in the shell and water flows in the pipeline from bottom to top. The invention further provides a method adopting the equipment.

Description

technical field [0001] The invention belongs to the technical field of energy recovery in metallurgy, and in particular relates to a metallurgical slag waste heat recovery device and a method for using the device. Background technique [0002] Since 2000, my country's steel output has been growing rapidly, reaching 489 million tons in 2007, accounting for 1 / 3 of the world's steel output. Metallurgical enterprises are already the largest energy users in my country, accounting for about 15% to 18% of the country's total electricity consumption. However, the energy utilization efficiency of the metallurgical industry is low. At present, the comprehensive energy consumption of large and medium-sized metallurgical enterprises in my country is about 640kg standard coal / ton of steel, and steel CO 2 The production amount is 1.88tCO 2 / ton of steel, respectively 10% and 25% higher than the international advanced level. [0003] Waste heat resources in the metallurgical industry i...

AI Technical Summary

Problems solved by technology

In this technology, the waste heat resources of molten metallurgical slag are not utilized, and a large amount of water resources are lost. At the same time, a large amount of polluting gas is produced during the process of water flushing slag, causing environmental pollution.

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