Control method for stabilizing and enhancing sintered ring cooling wind temperature while smelting steel

Abstract

The invention relates to the field of reclaiming of waste gas and waste heat in the steel industry and power generation by the waste gas and the waste heat, in particular to a control method and a device for stabilizing and improving air taking temperature of a sintered ring in steel smelting. The device and the method are characterized in that the device and the technical method can achieve relative stabilization and moderate improvement of the temperature of the waste gas at the upper part of an inner batch layer of a cooling trolley through increasing and adjusting speed and cooled air of a circular cooler and uniformity for transversely feeding at a feed opening; and at the same time, under the premise that the temperature of the waste gas reaches the technical requirement of a waste heat generating technique, flow of the waste gas at the upper part of the batch layer is increased by properly increasing blown air amount at the lower part of the cooling trolley, so as to ensure relative stabilization and moderate improvement of air inlet temperature and flow of a waste heat boiler, and promote stabilization and improvement of vapor yield of the waste heat boiler and generated energy of a generating system.

Description

technical field [0001] The invention relates to the recovery and utilization of exhaust gas waste heat of sinter coolers in the iron and steel industry, in particular to the field of recovering waste gas waste heat of sinter coolers and using them for power generation. Background technique [0002] In the existing technology of sintering waste heat power generation, the heat source of the waste heat boiler mainly comes from the waste gas waste heat taken from the upper part of the material layer in the cooling zone where the temperature of the sintered ore is cooled by the sinter cooling machine trolley. In the actual working process of sinter cooling, due to the influence of various factors such as sinter flow rate, material layer thickness, air volume at the bottom of the trolley, lateral distribution uniformity of material layer thickness, sinter particle size, etc., the material The exhaust gas temperature on the upper part of the floor tends to fluctuate frequently. At ...

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Problems solved by technology

In the actual working process of sinter cooling, due to the influence of various factors such as sinter flow rate, material layer thickness, air volume at the bottom of the trolley, lateral distribution uniformity of material layer thickness, sinter particle size, etc., the material The exhaust gas temperature on the upper part of the floor tends to fluctuate frequently. At the same time, due to the existence of cold air leakage from the lower part of the cooling trolley and hot air leakage from the upper part of the cooling trolley, the exhaust gas flow rate is relatively reduced and unstable. The combination of the above factors is serious It affects the steam output of the waste heat boiler, which in turn seriously affects the stability of the power generation system

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