Classification recovery and step utilizing method of residual heat resources in sintering process

Abstract

The invention belongs to the residual heat resource recovery and the field of utilization technology in the metallurgical process, particularly to the high efficiency recovery and utilization method of the low temperature residual heat resource based on the cementing process of the energy saving and emission reduction, characterized by recovering the cooling exhaust of the high temperature but also recovering the cooling exhaust, the sintering exhaust of the low temperature. Under the premise for improving the sintering agglomeration technology condition, the robbed residual heat of each grade is in the step utilization. The invention makes full consideration of the organic combination of the residual heat recovery and utilization, overcomes the problems of grave irradiation of the residual heat resource and the single recovery utilization mode and the like, realizes the high efficiency recovery and utilization of the cooling exhaust and the sintering exhaust, which has the advantages of improved sintering technology, high efficiency recovery and utilization of the sintering residual heat resource and reduced atmospheric pollutant and the like.

Description

Technical field: [0001] The invention belongs to the technical field of recovery and utilization of waste heat resources in metallurgical processes, and in particular relates to an efficient recovery and utilization method of low-temperature waste heat resources in a sintering process based on energy saving and emission reduction. Background technique: [0002] The waste heat resources of the sintering process (referred to as sintering waste heat, the same below) are mainly composed of two parts: the sensible heat of sintering ore from the cooling machine, that is, the cooling waste gas, and the sensible heat of the sintering waste gas from the sintering machine, that is, the sintering waste gas. The efficient recovery and utilization of sintering waste heat is one of the main measures to further reduce the energy consumption of the sintering process. The main problems existing in the utilization of sintering waste heat are: inability to fully understand the characteristics ...

AI Technical Summary

Problems solved by technology

The main problems existing in the utilization of sintering waste heat are: inability to fully understand the characteristics of large flow rate and large grade change of sintering waste heat carrier, serious disconnection between recovery and utilization, low level of control and adjustment, resulting in serious dissipation of waste heat resources, single recycling mode, etc. problems, making the sintering waste heat recovery rate low

[0003] Ignore the recovery and utilization of waste heat with low temperature, and only recycle the part of cooling waste gas with high temperature, and do not recycle the sintering waste gas and cooling waste gas with low temperature, resulting in serious dissipation of sintering waste heat resources and large waste;

[0004] Neglecting the direct heat recovery used to improve the sintering process conditions (such as hot air sintering, ignition furnace combustion and sintering raw material drying preheating), the recovered waste heat is only passed into the waste heat boiler to produce steam (reused for power generation), resulting in sintering waste heat resources single mode of use;

[0005] The technical level of steam production by waste heat boilers is low, which makes the "quantity" and "quality" of steam fluctuate greatly, and it is difficult to merge into the steam pipe network, so that the steam cannot find suitable users, resulting in the situation that the steam is released in vain during non-heating seasons

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