Cascade variable double amplitude limit temperature control system in ladle baking control and method

A technology of control system and cascade regulation, applied in the direction of control/regulation system, temperature control, non-electric variable control, etc., can solve problems such as waste of energy, incomplete combustion of fuel, large pollution, etc., to improve quality and quality, save energy Emission reduction effect and service life improvement effect

Active Publication Date: 2011-04-06
上海安可科技股份有限公司
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Problems solved by technology

This method is easy to adjust the two single-loop regulators, and the baking temperature curve can be basically controlled according to the air-fuel ratio. This method has large fluctuations in air and gas, and incomplete combustion of fuel wastes energy, causing large pollution and inaccurate temperature control.

Method used

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  • Cascade variable double amplitude limit temperature control system in ladle baking control and method
  • Cascade variable double amplitude limit temperature control system in ladle baking control and method
  • Cascade variable double amplitude limit temperature control system in ladle baking control and method

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Embodiment 1

[0034] The present invention uses the temperature series-parallel adjustment system as the main system. In the temperature feedback control mode, the purpose of selecting the cascade adjustment control method is to control the baking temperature of the ladle, and the temperature control is realized by changing the combustion gas flow rate and air flow rate. . Analyzing these measurement signals and temperature control objects, it can be concluded that temperature measurement and control is a large lag link, and its transfer function is approximately a second-order inertial link plus a pure lag link, while the gas flow and air flow are transferred from the measurement signal to the control signal The response is very fast, and its transfer function is approximately a first-order inertial link. The main source of interference is also from the gas and air pipelines. Such a system is most suitable for the cascade regulation control method. The cascade adjustment control method is ...

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Abstract

The invention discloses a cascade variable double amplitude limit temperature control system in ladle baking control and a method. The system comprises a temperature PID module, a gas PID module, a calculator module, an air PID module, a gas amount amplitude limiting module, an air amount amplitude limiting module and a furnace temperature module. The invention can farthest improve the use ratio of the fuel, reduce the emission of the harmful gases and successfully overcome the difficulty by adopting the small flow rate control technology. The control technology improves the quality of ladle baking to a great extent, prolongs the service life of the ladle and simultaneously conforms to the requirements for energy saving and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of intelligent control, and relates to a control system, in particular to a variable double-limiting temperature cascade adjustment control system in ladle baking control; meanwhile, the invention also relates to a control method of the above control system. Background technique [0002] Ladle baking is one of the main technological links in the steelmaking process. The performance of baking control has a great impact on tapping temperature, operating rate, and service life of the ladle. [0003] Regenerative ladle baking technology is a baking technology commonly used in steelmaking plants at home and abroad, and the following two temperature control systems are generally used in regenerative baking technology. [0004] 1. Single-loop temperature PID (proportional, integral, differential operation control) and proportional regulating valve control system: [0005] The output of the regulator directly contr...

Claims

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Application Information

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IPC IPC(8): B22D46/00B22D41/01G05D23/00
Inventor 初福江吴小勇汪红兵侯志昌
Owner 上海安可科技股份有限公司
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