Cooling granulation and waste heat recovery device and method for high-temperature molten yellow phosphorus slags

Abstract

The invention discloses a cooling granulation and waste heat recovery device for high-temperature molten yellow phosphorus slags. The cooling granulation and waste heat recovery device for the high-temperature molten yellow phosphorus slags comprises a granulation heat exchange chamber and a fluidized bed heat exchange chamber, the granulation heat exchange chamber is of an air quenching and waterquenching combined waste heat recovery structure, the fluidized bed heat exchange chamber is of a fluidized bed heat exchange structure, a slag inlet groove is connected to the granulation heat exchange chamber, a vibration bed is arranged below the granulation heat exchange chamber, and a chute is formed in the vibration bed and connected with a feeding port of the fluidized bed heat exchange chamber. The cooling granulation and waste heat recovery device for the high-temperature molten yellow phosphorus slags has the advantages that wind quenching and water quenching are combined, so that granulation treatment is carried out on the high-temperature molten slags, and waste heat is recovered; high-pressure air is adopted to granulate the molten slags, so that the effect is better, and subsequent slag treatment and utilization are better facilitated; and a heat exchange medium adopts atomized water different from a large amount of liquid water in the past, and the slags with smaller particle size directly exchange heat with the atomized water more sufficiently and quickly, so that the conversion efficiency of heat energy and the recovery rate of the heat energy are further improved.

Description

technical field [0001] The invention relates to a high-temperature molten yellow phosphorus slag cooling granulation waste heat recovery device and method, and belongs to the field of slag granulation heat energy recovery. Background technique [0002] Yellow phosphorus slag is industrial waste generated during the production of yellow phosphorus, and its stacking will cause serious pollution to the surrounding atmosphere, water, soil and ecological environment. With the development of renewable resource technology, the slag can be cooled and granulated to make it a raw material for the preparation of other materials, so as to maximize the utilization of resources. Yellow phosphorus slag belongs to silicate slag, which has low thermal conductivity and high viscosity. In order to ensure fluidity, the slag discharge temperature is 1400-1500°C. Although the enthalpy of molten slag is large, due to its low thermal conductivity, Slow heat transfer and difficult selection of heat...

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Problems solved by technology

Yellow phosphorus slag belongs to silicate slag, which has low thermal conductivity and high viscosity. In order to ensure fluidity, the temperature of the slag is 1400-1500°C. Although the slag has a large heat enthalpy, due to its low thermal conductivity, Slow heat transfer and difficult selection of heat transfer medium lead to difficulties in heat recovery. Therefore, enterprises only consider the subsequent utilization of slag when processing slag, and the heat is basically not recovered.

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