Automatic control system of blast furnace hot blast stove combustion process

An automatic control system and combustion process technology, applied in the direction of combustion method, combustion control, fuel supply adjustment, etc., can solve the problems of complex process changes, restricting system adaptability, and difficulty in guaranteeing the integrity and representativeness of the instance library, etc. Achieve the effect of reducing work intensity and avoiding intervention

Active Publication Date: 2009-04-15
SHOUGANG CORPORATION +1
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Problems solved by technology

However, the primary issue in summarizing the control rules is the completeness and scientificity of the rules, which restricts the adaptability of the system.
The method of adjusting the combustion cycle based on the case library faces problems such as complex changes in process conditions, and difficulty

Method used

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  • Automatic control system of blast furnace hot blast stove combustion process
  • Automatic control system of blast furnace hot blast stove combustion process
  • Automatic control system of blast furnace hot blast stove combustion process

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Embodiment Construction

[0065] A set of automatic control system applied to the combustion process of blast furnace hot blast stove proposed by the present invention adopts the control method combining self-learning and fuzzy control, and is described in detail in conjunction with accompanying drawings and examples as follows:

[0066] The whole process of automatic combustion control of a specific blast furnace hot blast stove will be described in detail below. The main parameters of the blast furnace hot blast stove selected in this embodiment are:

[0067] Blast furnace volume: 2650m 3

[0068] Number of hot blast stoves: 4

[0069] Combustion system: two burning and two sending

[0070] Hot stove type: top combustion

[0071] Fuel type: blast furnace gas, coke oven gas mixed

[0072] Burning cycle: 120min

[0073] The highest value of exhaust gas temperature: 350°C

[0074] The combustion control method of the blast furnace hot blast stove in this embodiment can be divided into two stages:...

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Abstract

The invention relates to an automatic control system during the combustion process of a hot air furnace of a blast furnace, belonging to the field of automatic combustion control technique of the hot air furnace of the blast furnace. Firstly, the system self-learns the historical combustion data of the furnace according to the specified conditions, and determines the best coal gas and air flux of the furnace and the best initial openness of an adjusting valve to be as the initial parameters of the next combustion period. During the normal combustion stage, a control method that fuzzy control is combined with self-optimization control is adopted, the fastest increment of the temperature at the arch is taken as the object, and the air combustion proportion coefficient is quickly optimized according to the temperature change of the combustion chamber. Simultaneously, by adopting a non-difference self-adaptive single closed ring control system combined with the methods such as fuzzy control, self-learning and pulse driving and the like, the action of the adjusting valve can be effectively controlled, and precise and quick adjustment and control of the flux are realized. According to the trend change of the temperature of the waste gas, the system adopts the fuzzy control arithmetic to control the combustion rhythm. Simultaneously, the system comprehensively summarizes the manual combustion experience and achieves the object of completely automatic control without man-watching during the whole combustion process.

Description

technical field [0001] The invention belongs to the field of automatic combustion control of blast furnace hot blast stoves, in particular to a set of special control methods for automatic combustion control of hot blast stoves based on the combination of self-learning and fuzzy control. Background technique [0002] The hot blast stove is an important part of the blast furnace smelting system, and it undertakes the important task of providing hot blast for the blast furnace. Due to the complexity of the combustion process of the hot blast stove and the limitations of the process equipment, the automatic control of the hot blast stove has not been solved. [0003] The control process of hot blast stove mainly includes furnace replacement control and combustion control. Furnace replacement control technology is very mature and has been widely used in actual production. The combustion control of the hot blast stove includes automatic control of the entire combustion process, ...

Claims

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Application Information

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IPC IPC(8): F23N1/02F23N5/00
Inventor 王自亭胡雄光顾里云王春生杨永琦朱继东刘景春谭金成杨伟强
Owner SHOUGANG CORPORATION
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