Waste heat recovery from smelting reduction ironmaking in heat pipe type rotary hearth furnace and steam production apparatus

Abstract

A heat pipe type rotary hearth furnace melting reducing iron-making waste heat recovery and steam producing device is composed of a secondary combustion setting chamber (2), a steam superheater (6), a heat pipe steam generator (8), a heat pipe feed water preheater (10), a bag type dust collector (12), a chimney (13) and a steam dome (20). The waste heat recovery and steam producing device is characterized in that one side of the outer wall of the secondary combustion setting chamber (2) is provided with an inlet (1), and the other side is connected with an outlet (4) which is connected with a high-temperature flue (5); the steam superheater (6) and the heat pipe steam generator (8) are arranged on the high-temperature flue (8); the heat pipe steam generator (8) adopts heat pipes to be as the heat conducting elements; the bottom end of the high-temperature flue (5) is provided with an ash discharge tee (9); the horizontal outlet of the ash discharge tee (9) is orderly connected with the heat pipe feed water preheater (10), the bag type dust collector (12) and the chimney (13). The device has high heat conducting efficiency, safety, reliability, small volume of the equipment and convenient dismounting.

Description

technical field [0001] The invention relates to the fields of metallurgy, energy saving and environmental protection, in particular to a heat pipe type rotary hearth furnace smelting reduction ironmaking waste heat recovery and steam production device. Background technique [0002] Rotary hearth furnace smelting reduction ironmaking is a newly developed metallurgical technology, which eliminates the two major steps of coking and sintering in traditional ironmaking. The implementation of smelting reduction technology will play a positive role in promoting environmental protection, improving the energy structure of the steel industry and improving economic benefits. However, in the production process, a large amount of high-temperature and high-dust exhaust gas will be generated, causing serious environmental pollution, and a large amount of heat in the exhaust gas will be wasted. At present, there is an urgent need for a device that can fully recycle the waste gas generated ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a heat pipe type rotary hearth furnace smelting reduction ironmaking waste heat recovery and steam production device to solve the problem of heat recovery of high temperature and high dusty waste gas produced in the new technology of rotary hearth furnace smelting reduction ironmaking. The heat pipe and the multi-stage heat pipe steam generation system with bare pipe or wound fins outside the pipe and its combination generate superheated steam below 450°C at 2.5MPa, and make the high-temperature exhaust gas pass through the bag dust removal and ash conveying system after cooling Discharge

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