Multi-stage phase change recycling and storing device of metallurgy high-temperature slag waste heat

Abstract

The invention relates to a multi-stage phase change recycling and storing device of metallurgy high-temperature slag waste heat. The multi-stage phase change recycling and storing device comprises a control system, a guide rail system, a first-stage high-temperature thermal energy phase change recycling and storing unit, a second-stage medium-temperature thermal energy phase change recycling and storing unit and a third-stage low-temperature thermal energy phase change recycling and storing unit. Phase change energy storage materials with different phase change temperatures are contained in the thermal energy phase change recycling and storing units of all stages. By means of the guide rail system, the thermal energy phase change recycling and storing units of all stages are connected, andhigh-temperature waste slag is conveyed between the phase change recycling and storing units of all stages. The multi-stage phase change recycling and storing device has the beneficial effects that by arranging the thermal energy phase change recycling and storing units of the three stages, high-temperature heat, medium-temperature heat and low-temperature heat of the metallurgy waste slag are recycled to the maximum extent in stages, the recycling efficiency of the heat is improved, and time and space advantages of the phase change energy storage materials on the aspect of energy recycling are brought into full play.

Description

technical field [0001] The invention belongs to the field of energy recovery in the metallurgical industry, and in particular relates to a multi-level phase change recovery and storage device for waste heat of metallurgical high-temperature slag. Background technique [0002] As an industry with high pollution and high energy consumption, how to save energy and reduce consumption and improve the utilization rate of waste energy is the main problem faced by the modern metallurgical industry. As the main solid waste in the metallurgical production process, metallurgical waste slag contains abundant recyclable energy. [0003] Taking iron and steel metallurgy as an example, as the main source of waste slag in the iron and steel smelting process, steel slag accounts for about 8-15% of crude steel output. A large amount of high-temperature slag, such as converter slag, electric furnace slag, and refining slag, will be produced in the steelmaking process, and its temperature can ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-stage phase change recovery and storage device for metallurgical high-temperature slag waste heat, so as to solve the problem in the prior art that a large amount of heat in waste slag in the metallurgical field cannot be effectively collected and stored, resulting in waste of secondary energy

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