High-temperature slag waste heat recycling system

Abstract

The invention provides a high-temperature slag waste heat recycling system which comprises a high-temperature slag indirect water-cooling heat exchange device, a waste heat boiler, a steam power generation device, a steam heat supply device, a condenser, a condensate pump and a water feeding pump. The high-temperature slag indirect water-cooling heat exchange device is provided with a cooling water inlet and a cooling water outlet. The cooling water outlet of the high-temperature slag indirect water-cooling heat exchange device communicates with an inlet of the waste heat boiler, an inlet of the steam power generation device and an inlet of the steam heat supply device both communicate with a steam outlet of the waste heat boiler, and a final-stage steam outlet of the steam power generation device communicates with an inlet of the condenser. The condenser communicates with an inlet of the water feeding pump through the condensate pump, and an outlet of the water feeding pump communicates with the cooling water inlet of the high-temperature slag indirect water-cooling heat exchange device.

Description

technical field [0001] The invention relates to the field of high temperature slag waste heat recovery and utilization, in particular to a high temperature slag waste heat recovery and utilization system. Background technique [0002] There are a large amount of high-temperature slag in the industrial field, such as blast furnace slag, steel slag, nickel-iron slag, etc. in the production process of iron and steel metallurgy industry, copper slag in the production process of non-ferrous metal industry, and slag in the high-temperature melting production process of hazardous waste. [0003] Taking blast furnace slag with the largest amount as an example, the water quenching method is mainly used to cool blast furnace slag at present. Further drying is required for resource utilization, which increases the energy consumption of its treatment. [0004] The efficient utilization of high-temperature slag has caused people's research and development upsurge 50 years ago. At presen...

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Problems solved by technology

The heat recovery efficiency of the air quenching method is about 48%, and the quality of the finished slag is equivalent to that of the water quenching slag, but there are problems such as large floor space, high investment costs, and high operating costs.

Rotary cup granulation has high waste heat recovery efficiency and good granulation effect, but the device structure is complex, and high-temperature slag with poor fluidity is prone to technical problems such as blockage and agglomeration

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