Sintering and cooling integrated method for efficiently recovering and utilizing waste heat resources and device thereof

Abstract

The invention relates to a sintering and cooling integrated method for efficiently recovering and utilizing waste heat resources and a device thereof. The method has the steps that the length of a sintering machine is doubled; the front half part of a sintering ore cooling section is set as a cooling section I, and the back half part of the sintering ore cooling section is set as a cooling section II; a gravitational crusher and an assistant cooling device are equipped below the tail part of the cooling section; after sintering ore passes through a sintering area of the device, pulverized coal completely enters the cooling section to be cooled and then falls into the crusher; flue gas at the tail part of the sintering machine, which has a high temperature, a high oxygen content and a low sulfur content, and flue gas at the cooling section I are led into a waste heat boiler to produce medium-pressure steam; the steam is merged into a steam pipe network or is used to generate electricity; low temperature flue gas part getting out of the waste heat boiler is led into the head part of the sintering machine to preheat the sintering ore; and the high temperature part of low temperature flue gas in the cooling section II is led into a table top of the sintering machine to conduct hot air sintering. By adopting the method, the waste of sensible heat of the sintering ore is reduced, the waste heat recovery and utilization rate is high, energy consumption of a sintering procedure is effectively reduced, and the method is suitable for being popularized and applied to the technical field of the recovery and the utilization of waste heat resources in the metallurgical process.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting and efficient recovery and utilization of waste heat resources, and in particular relates to a method and device for efficient recovery and utilization of waste heat resources in a sintering process based on energy saving and emission reduction. Background technique [0002] The waste heat resources in the sintering process (referred to as sintering waste heat, the same below) are mainly composed of two parts: one part comes from the tail of the sintering machine, and the temperature is about 950 ° C ~ 1050 ° C. The heat accounts for about 70% of the total waste heat resources in the sintering process; the other part comes from the sensible heat of the sintering flue gas in the main exhaust pipe of the sintering machine, which accounts for about 30% of the total waste heat resources. The efficient recovery and utilization of sintering waste heat is one of the main measures to furth...

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Problems solved by technology

[0007] Purpose of the invention: The present invention provides a method and device for efficient recovery and utilization of waste heat resources integrated with sintering and cooling. The problem of a large amount of sensible heat waste in

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