High temperature slag waste heat recovery system and method

Abstract

The invention discloses a high-temperature slag waste heat recovery system and method. The system comprises a slag conveying unit, a slag pelletizing unit and a waste heat recovery unit, wherein the slag conveying unit mainly consists of a slag tank and a crane; the slag pelletizing unit mainly consists of a rotary cup, a rotary device, a pelletizing and cooling device and a slag collecting and cooling device; the pelletizing and cooling device is arranged at the periphery of the rotary cup and a rotary device; the slag collecting and cooling device is arranged at the periphery of the pelletizing and cooling device; the waste heat recovery unit is a waste heat boiler, heat exchange tubes at a slag particle inlet end in the waste heat boiler are arranged in a crossing downstream manner, and heat exchange tubes at a slag particle outlet end are arranged in a crossing countercurrent manner. The system is compact in layout, simple in waste heat recovery process and high in recovery efficiency, and seamless connection of a high-temperature slag treatment system and a production system is achieved; the efficiency for recovering sensible heat of high-temperature slag is high, and the environmental pollution problem is effectively solved; moreover, no influence is generated on slag subsequent use value; the system and method are suitable for industrial production operation.

Description

technical field [0001] The invention belongs to the field of waste heat recovery and utilization, and in particular relates to a high-temperature slag waste heat recovery system and method. Background technique [0002] "Increasing income and reducing expenditure" is a wise saying to solve energy and resource problems in the 21st century, and "energy-saving technology" is even known as the "fifth energy source". my country's industrial field is rich in waste heat and energy resources. With the continuous development of energy-saving technology, more and more waste heat resources have been applied. However, the sensible heat of high-temperature slag containing high-temperature waste heat has not been effectively utilized. At present, the effective treatment method of high-temperature slag is mainly water quenching method. Part of the high-temperature slag treated in this way can be used as raw material for cement production, and some can only be piled up in the slag yard. F...

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Problems solved by technology

[0003] Some existing patented technologies on sensible heat recovery of high-temperature slag only focus on the waste heat recovery of slag, and do not fully consider the impact of slag processing system on production equipment

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