Energy-saving regulating and controlling method for combustion fan of blast furnace hot blast stove

Abstract

The invention relates to an energy-saving regulating and controlling method for a combustion fan of a blast furnace hot blast stove. A traditional combustion fan is designed according to needs of maximum working stations of multiple hot blast stoves, operates at power frequency and is constant in power supply pressure; air supply amounts of each hot blast stove at different working conditions are regulated by a corresponding combustion air door of each hot blast stove; as open degrees of the combustion air doors at the most of time are small, and the air supply pressure is higher, the waste of mass power energy is caused. According to the energy-saving regulating and controlling method disclosed by the invention, under the condition that operation working conditions of the combustion fan of the original blast furnace hot blast stove are unchanged, a frequency converter is added on the blast furnace hot blast stove, and a pressure sensor is arranged on an outlet pipeline of the combustion fan; a control signal of the frequency converter, a pressure signal of the pressure sensor and an open degree signal of the combustion air door are connected to an energy-saving controller; the energy-saving regulation and control over the combustion fan of the blast furnace hot blast stove are realized by adopting a technical method of linking the air door with pressure regulation, so that proper air supply pressure is dynamically regulated and controlled according to the maximum open degree of the air door, and the aims of greatly saving energy and reducing consumption are achieved.

Description

technical field [0001] The invention belongs to the technical field of energy saving of a combustion-supporting blower for a hot blast stove in metal smelting, and in particular relates to an energy-saving control method for a combustion-supporting blower for a blast furnace hot blast stove. Background technique [0002] In ironmaking and other metal smelting processes, in order to keep the blast furnace production stable and continuous, the hot blast furnace is used to burn fuel to store heat, heat the blast, and continuously send hot blast into the blast furnace. The hot blast stove has three working states: burning state, simmering state and air supply state. When the hot blast stove is in the burning state, gas is sent to the hot blast stove through the gas pipeline, and an appropriate amount of combustion-supporting air is sent to the hot blast stove through the combustion-supporting fan and the combustion-supporting damper. The combustion-supporting damper is automatic...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide an energy-saving control method for the combustion-supporting fan of the blast furnace hot blast stove, mainly to solve the problem of waste of electric energy caused by over-pressure air supply

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