Low boiling point working fluid circulation system for recovering blast furnace slag heat

Abstract

The invention relates to a low boiling point working fluid circulation system for recovering blast furnace slag heat, and belongs to mechanical equipment. According to the low boiling point working fluid circulation system, a low boiling point working fluid heat conduction device, a low boiling point working fluid heat convection device and a low boiling point working fluid heat radiation device are arranged on a slag ditch, a punching box and other facilities in the existing water quenching treatment system for the blast furnace slag, heat exchanges between the low boiling point working fluid and hot water on the bottom of the punching box, between the low boiling point working fluid and water steam on the top of the punching box, and between the low boiling point working fluid and slag ditch high temperature slag are performed respectively in three manners such as heat conduction, heat convection and heat radiation to form the low boiling point working fluid steam so as to drive a low boiling point working fluid generating unit to generate electricity, heat generated in various links of the high temperature slag water quenching process is systematically recovered in an organized manner through the system, efficient waste heat resource utilization is achieved, and energy consumption of iron and steel enterprises is saved.

Description

technical field [0001] The invention relates to a low-boiling-point working medium circulation system for recovering heat energy of blast furnace slag, which belongs to the category of mechanical equipment. Background technique [0002] A large amount of high-temperature slag will be produced in the blast furnace ironmaking process of iron and steel enterprises. The temperature of the slag is 1450-1600 °C, and the state of the slag is molten and flowing. For these high-temperature slags, water quenching is currently used for processing. After the high-temperature slag flows out from the slag outlet of the blast furnace through the slag ditch, the slag is quenched by high-pressure water jets in the punching box, and vitrified slag containing a certain amount of glass is formed after quenching and solidification, which is used as a cement raw material. [0003] During the above-mentioned water quenching process, a large amount of disorganized steam and high-temperature hot wa...

AI Technical Summary

Problems solved by technology

On the one hand, it causes waste of hot water heat energy and slag radiant heat. On the other hand, because these waste heat resources are only partially reused, rather than organized and systematic recovery, the current water quenching process system The recovery efficiency of waste heat resources is extremely low, and the waste heat resources are greatly wasted

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