Method and device for generating electricity by using afterheat of high-temperature steel smelting slag

Abstract

The invention relates to a method and a device for generating electricity by using afterheat of high-temperature steel smelting slag. The method comprises the following steps of: feeding slag which is obtained in steel smelting, stores heat energy and serves as a heat production substance into a boiler; heating water/gas to produce steam with proper pressure; and feeding the steam produced by the boiler into a steam turbine to generate electricity. The device comprises a steam boiler and a steam turbine, wherein the boiler is provided with a smelting furnace slag input device; a steam output pipeline of the steam boiler is connected with the steam turbine which is connected with an electricity generator; a steam pressure stabilization and adjustment device is arranged between the steam boiler and the steam turbine; the steam pressure stabilization and adjustment device comprises a tank body; and a transverse baffle device capable of floating up and down is arranged in the tank body. By adoption of the invention, the heat energy in the high-temperature slag is recycled effectively, energy waste is avoided, the generated electricity can be directly used in local enterprises or all other industrial or civil places, and reuse of energy is realized effectively.

Description

technical field [0001] The invention relates to a method and device for generating electricity with high-temperature waste heat from iron and steel smelting waste, which is mainly used for recycling and utilizing the heat energy stored in the high-temperature waste generated in the iron and steel smelting process. Background technique [0002] Under the existing technology, the waste slag produced by iron and steel smelting is mostly transported to the waste slag recovery pool through the waste slag conveying device, and water is sprayed on the waste slag during the transportation to reduce the temperature of the waste slag. The method of spraying water reduces the temperature to normal temperature, and then transports it to other places for making building materials or for other uses. [0003] According to measurements, the temperature of the iron and steel smelting slag discharged from the smelting furnace is about 1600°C, which stores high heat energy. Natural cooling or ...

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Problems solved by technology

[0003] According to measurements, the temperature of the iron and steel smelting waste slag discharged from the smelting furnace is about 1600°C, and it stores high heat energy. Natural cooling or water spraying is used to cool it down, so that all the heat energy is lost to the atmosphere, resulting in energy serious waste of

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