Alarm current-limiting type waste-heat power generation system based on submerged-arc furnace

Abstract

The invention discloses an alarm current-limiting type waste-heat power generation system based on a submerged-arc furnace. The alarm current-limiting type waste-heat power generation system based on the submerged-arc furnace comprises a waste heat boiler, an evaporation heating surface, a coal economizer, a steam pocket, a steam superheater, a steam turbine, a power generator, a flash evaporator and a condenser. A waste heat power generation control system is arranged inside the power generator 7. The waste heat power generation control system is composed of a transformer T1, a diode bridge rectifier U1 connected with a secondary side coil of the transformer T1 in series, a power circuit and a power amplification circuit connected between the positive output end and negative output end of the diode bridge rectifier U1 in series, a temperature alarm circuit connected with the positive output end of the diode bridge rectifier U1, and a current-limiting circuit connected to the power circuit in series. The two ends of a primary side coil of the transformer T1 form the input ends. The waste-heat power generation system capable of recovering waste heat can recover and process waste heat sufficiently, thereby increasing the utilization rate of energy and further relieving burdens of enterprises.

Description

technical field [0001] The invention belongs to the technical field of waste heat power generation, and in particular relates to an alarm current-limiting waste heat power generation system based on a submerged arc furnace. Background technique [0002] Most submerged arc furnaces are semi-closed electric furnaces, which not only solve the problem of smelting process operation, but also create conditions for effectively solving the technology of furnace gas purification and waste heat recovery and utilization; About 10 to 15 times of that, nearly 50% of the energy consumption in the production process is discharged into the atmosphere in the form of sensible heat of low-temperature flue gas, which not only wastes heat energy but also pollutes the environment. However, the waste heat of the flue gas of the current submerged arc furnace is basically not recovered, mainly due to the low temperature of the flue gas and the high investment required for waste heat recovery. There...

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Problems solved by technology

[0002] Most submerged arc furnaces are semi-closed electric furnaces, which not only solve the problem of smelting process operation, but also create conditions for effectively solving the technology of furnace gas purification and waste heat recovery and utilization; About 10 to 15 times of that, nearly 50% of the energy consumption in the production process is discharged into the atmosphere in the form of sensible heat of low-temperature flue gas, which wastes heat energy and pollutes the environment

However, the waste heat of the flue gas of the current submerged arc furnace is basically not recovered, mainly due to the low temperature of the flue gas and the high investment required for waste heat recovery

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