Intelligent optimization control system of blast furnace hot-blast stove

A technology of intelligent optimization and control system, applied in general control system, control/regulation system, blast furnace, etc.

Active Publication Date: 2013-02-06
北京和隆优化科技股份有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] In summary, the existing technology still has certai

Method used

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  • Intelligent optimization control system of blast furnace hot-blast stove
  • Intelligent optimization control system of blast furnace hot-blast stove
  • Intelligent optimization control system of blast furnace hot-blast stove

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Embodiment

[0032] As shown in the attached figure, the heat storage rate setter receives the cold air temperature signal and the load signal from the blast furnace station, including information such as hot air temperature, hot air flow rate, and furnace replacement time, and calculates the real-time heat storage rate setting value of the hot blast stove, and its output Connected to the setpoint terminal of the heat storage rate regulator; the real-time heat storage rate calculator accepts vault temperature, checker brick temperature, exhaust gas temperature and ambient temperature, cold air flow, cold air temperature and hot air temperature, and gas composition measurements from the hot blast furnace signal to calculate the real-time heat storage rate of the hot blast stove, and its output is connected to the measured value end of the heat storage rate regulator. The physical meaning of the output of the heat storage rate regulator is the set value of the gas flow. The value range is 80~...

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Abstract

The invention discloses an intelligent optimization control system of a blast furnace hot-blast stove, which relates to the technical field of blast furnace ironmaking optimization control and can reduce coal gas consumption, ensure equipment safety and prolong the service life on the premise of ensuring that the required hot-blast temperature and flow of a blast furnace are satisfied. The system is technically characterized in that the on-line calculation of a heat accumulation rate is realized based on heat balance, a reasonable heat accumulation rate setting curve is set according to the required total heat amount of blast and heating time of the blast furnace and the heat accumulation rate characteristic of a hot-blast stove, the amount of fuel in the heating stage is controlled in real time according to the heat accumulation rate, and the calculated amount of fuel is limited according to accepted upper limits of arch crown temperature and exhaust gas temperature processes. The system fully meets the demands of the blast furnace for hot blast, reduces lost heat carried away by waste gas and simultaneously ensures the equipment safety; and furthermore, the air-fuel ratio is optimized by taking the heat accumulation rate as the optimization target value and using a trial-and-error self-optimization algorithm, so that the fuel utilization is maximized, and the energy saving of the device is ensured at multiple levels.

Description

technical field [0001] The invention relates to the technical field of optimal control of blast furnace ironmaking, in particular to an intelligent optimal control system of a blast furnace hot blast stove. 。 Background technique [0002] Blast furnace hot blast stove is a device that provides combustion-supporting air at a certain temperature for blast furnace ironmaking. By storing heat in the checker bricks of the hot blast furnace, the heat storage of the checker bricks in the hot blast furnace is used to exchange heat for the combustion-supporting air supplied to the blast furnace. Blast furnace ironmaking has requirements on the temperature and flow rate of combustion air, which vary depending on the load of the blast furnace. Generally speaking, the higher the temperature of the hot air delivered to the blast furnace, the lower the energy consumption of blast furnace ironmaking; the thermal efficiency of the heat storage process of the hot blast furnace The higher th...

Claims

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Application Information

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IPC IPC(8): C21B9/00G05B13/04
Inventor 于现军高瑞峰王志明
Owner 北京和隆优化科技股份有限公司
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