Sintering ore cooling device and waste heat recovery system thereof

Abstract

The invention relates to the physical heat recovery field of solid high temperature materials. The system can be applied in the waste heat recovery of extra-large high-temperature particles such as high-temperature sintering ore and the like and the process is as follows: the high-temperature sintering ore from a sintering machine falls into a cold sinter furnace through a feeding system, gradually falls with ore discharge and enters a cooling section to radiate heat. The cooled sintering ore enters a vibrator feeder discharging system through a blanking hopper and a regulating gate. The process can be adopted to cool the sintering ore from about 700-800 DEG C to about 100 DEG C. Cold air provided by an air blower enters the cold sinter furnace through an air inlet and a blast cap, absorbs heat in the cooling section and then enters an annular channel, the high-temperature gas from the annular channel enters a waste heat boiler through a dust remover, the heat is transferred to a working medium and then pumped by the draft fan through the dust remover, and the gas is discharged in a chimney when reaching the dedusting standard. The heat-absorbing working medium (usually water) is converted to superheated steam with a certain parameter in the waste heat boiler to do work in a turbine and drive a generator to generate power. Dead steam after doing work enters a condenser and is sent back to the waste heat boiler through a circulating water pump, thus, a thermal cycle is completed.

Description

technical field [0001] The invention relates to high-temperature sinter cooling equipment and a waste heat recovery system. The cooling process and waste heat recovery system are simple and inexpensive, and can replace traditional equipment such as ring coolers and belt coolers. Background technique [0002] It is estimated that China's steel output will reach 630 million tons in 2010. The direct raw material for iron and steel metallurgical production is iron ore, and iron ore processing is the upstream process of iron and steel production. In fact, in the iron and steel metallurgy process, the iron ore sintering process is one of the main energy-consuming processes in iron and steel production. Z.C.Guo et al (2009, Energy (2009), doi:10.1016 / j.energy.2009.04.008), Bao Weijun, etc. (Second National Symposium on Circular Economy and Ecological Industry), Cai Jiuju, etc. (Cai Jiuju et al., Iron and Steel, Vol. 42, No. 6, June 2007), Guo Hanjie et al. (Guo Hanjie et al., Ir...

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Problems solved by technology

The use of the above three cooling methods not only occupies a large area and requires a large investment, but also requires high operation and maintenance costs. Small and medium-sized iron and steel enterprises can only stay away from it.

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