Combined fluidized bed type gas-solid heat exchange device utilizing waste heat of furnace slag

Abstract

The invention discloses a combined fluidized bed type gas-solid heat exchange device utilizing waste heat of furnace slag. The device comprises a gas-solid heat exchange body, and an air outlet is arranged at the top of the gas-solid heat exchange body. The device is characterized in that two partition walls are arranged in the gas-solid heat exchange body, connect a front faceplate with a rear faceplate of the same and divide a cabin inside the gas-solid heat exchange body into a left bubbling bed cabin, a spouted bed cabin and a right bubbling bed cabin, the left and right bubbling bed cabins are symmetrically arranged on two sides of the spouted bed cabin, the upper portions and the lower portions of the three cabins are communicated respectively, an independent air chamber is arranged at the bottom of each cabin, a dense-hole-type air distribution plate is arranged above the air chamber in the spouted bed cabin, a left air-cap-type air distribution plate and a right air-cap-type air distribution plate are arranged at the tops of the air chambers in the left and right bubbling bed cabins respectively, and the left air-cap-type air distribution plate is connected with the dense-hole-type air distribution plate through a second dense-hole-type air distribution plate and a first orthostomous section. The combined fluidized bed type gas-solid heat exchange device has good gas-solid heat exchange effect and can be widely applied in the field of steel and iron and power.

Description

technical field [0001] The invention relates to the technical field of blast furnace slag heat exchange, in particular to a compound fluidized bed type gas-solid heat exchange device utilizing waste heat of slag. Background technique [0002] The iron and steel industry is a pillar industry for the development of my country's national economy. Over the past few decades, steel production technology and scale have developed rapidly. In 2013, global steel production reached 1.527 billion tons, and China's steel production was about 779 million tons, accounting for nearly half of global steel production. The total energy consumption of the iron and steel industry accounts for about 16% of the total industrial energy consumption of the country. Calculated by the energy input of 1.757GJ per ton of steel production, a total of 417 million standard coal is consumed, and 1.9 tons of carbon dioxide emissions per ton of steel are calculated, a total of 13.21 billion tons of carbon dio...

AI Technical Summary

Problems solved by technology

However, the water quenching method has obvious defects: it consumes a lot of water resources; it cannot recover the heat of slag; it pollutes the environment; after water quenching, the slag particles need to be dried, and the additional energy consumption is high.

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