Blast furnace superconduction cooling waste heat power generation energy-saving control system based on overvoltage and overcurrent protection

Abstract

The invention discloses a blast furnace superconduction cooling waste heat power generation energy-saving control system based on overvoltage and overcurrent protection. The system is composed of a blast furnace body (1), a power generation system (12), a steam utilizing device, two or more annular superconduction heat exchange rings (2) which are annularly arranged along the side wall of the blast furnace body (1) in a layered mode, a waste heat control and treatment system and the like. The waste heat control and treatment system comprises a diode rectifier U, a voltage stabilization and transformation circuit and a three-terminal voltage stabilizing control circuit. The blast furnace superconduction cooling waste heat power generation energy-saving control system is characterized in that an overvoltage and overcurrent protection circuit is further connected in series between the voltage stabilization and transformation circuit and the three-terminal voltage stabilizing control circuit. According to the blast furnace superconduction cooling waste heat power generation energy-saving control system, hot water produced after heat exchange can be led out in a concentrated mode through the annular superconduction heat exchange rings which are embedded in the side wall of the blast furnace body and annular pipeline systems corresponding to the annular superconduction heat exchange rings, hence, heat exchange strength is enhanced, and heat exchange efficiency and cooling efficiency are improved; besides, due to the fact that the superconduction heat exchange rings are applied twice to be overheated to 400 DEG C, cooling waste heat can be used for generating electricity.

Description

technical field [0001] The invention relates to a high-efficiency power generation system for blast furnace cooling heat, in particular to an energy-saving control system for power generation of blast furnace superconducting cooling waste heat based on overvoltage and overcurrent protection. 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 in the...

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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 for blast furnace superconducting cooling waste heat power generation based on overvoltage and overcurrent protection

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