Energy-saving control system based on voltage stabilization and voltage transformation and used for blast furnace superconductive cooling waste heat power generation

Abstract

The invention discloses an energy-saving control system based on voltage stabilization and voltage transformation and used for blast furnace superconductive cooling waste heat power generation. The energy-saving control system is composed of a blast furnace body (1), a power generation system (12), a steam utilization device, one or more superconducting ring type heat exchange rings (2) surrounding the sidewall of the blast furnace body (1) in a layered mode, a waste heat control treatment system and the like. The waste heat control treatment system comprises a diode rectifier U, a voltage stabilization and voltage transformation circuit and a three-terminal voltage stabilization control circuit, wherein the three-terminal voltage stabilization control circuit is connected with the negative output end of the diode rectifier U and the voltage stabilization and voltage transformation circuit. According to the energy-saving control system, hot water subjected to heat exchange is led out in a centralized mode through the superconducting ring type heat exchange rings embedded in the sidewall of the blast furnace body and ring-type pipeline systems corresponding to the superconducting ring type heat exchange rings, so the heat exchange strength, the heat exchange efficiency and the cooling efficiency are improved; moreover, the traditional cooling water temperature is increased from 40 DEG C to 250 DEG C and then are overheated to 400 DEG C by using the superconducting ring type heat exchange rings twice, and accordingly cooling waste heat can be used for power generation.

Description

technical field [0001] The invention relates to a high-efficiency power generation system for cooling heat of a blast furnace, in particular to an energy-saving control system for power generation based on a voltage-stabilizing and variable-pressure blast furnace superconducting cooling waste heat. Background technique [0002] During the blast furnace production process, the cooling of the furnace wall requires a large amount of water to take away the heat to reduce the temperature of the furnace wall, so as to meet the process temperature requirements of the normal production of the blast furnace. The waste heat taken away by the cooling of the blast furnace and the surface heat dissipation ratio of the blast furnace wall account for 5% and 0.5% of the total heat consumption of the blast furnace respectively. Based on the simple calculation that 400-800Kg of coke is needed to produce one ton of pig iron, there are about 20-40Kg of coke produced Thermal energy is dissipated...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that people cannot fully use the waste heat generated in blast furnace production for secondary utilization to achieve energy conservation and environmental protection, and to provide an energy-saving control system based on voltage-stabilizing and variable-pressure blast furnace superconducting cooling waste heat power generation

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