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Heating furnace control and combustion optimization method

A combustion optimization and heating furnace technology, applied in the control of combustion, lighting and heating equipment, indirect carbon dioxide emission reduction, etc., can solve the problems of furnace thermal efficiency decline, incomplete combustion, thermal pollution, etc. The effect of improving safety life and compensating for insensitivity

Active Publication Date: 2017-03-01
XIAN IBL TECH DEV +1
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Problems solved by technology

If the excess air coefficient is too small, it will cause incomplete combustion, increase the heat loss of incomplete combustion, and reduce the thermal efficiency of the furnace; It causes heat pollution, which brings about the increase of exhaust heat loss and reduces the thermal efficiency of the furnace; moreover, the value determines the size of the resistance of the flue gas; because the excessive oxygen content brought by the excess air in the flue gas can cause the furnace The oxidation of internal components is intensified, and excessive oxygen also leads to intensified oxidation of the furnace tube surface, which directly affects the service life of the furnace tube
Furthermore, excess oxygen can also increase SO 2 to SO 3 Transformation, which increases the chance of low temperature dew point corrosion in flue gas

Method used

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  • Heating furnace control and combustion optimization method
  • Heating furnace control and combustion optimization method

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Embodiment Construction

[0049] The content of the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] refer to figure 1 As shown, it is a block diagram of the medium outlet temperature control loop, and the specific steps are:

[0051] First of all, in the process of medium temperature control, cascade control is adopted.

[0052] Secondly, the outer loop uses the medium outlet temperature control loop as the main control loop, and the inner loop uses the fuel flow control loop as the secondary control loop.

[0053] Finally, when the temperature of the medium increases, the amount of fuel is reduced, and when the temperature of the medium decreases, the amount of fuel is increased. Aiming at the large hysteresis characteristics of the medium outlet temperature, the anti-lag MFA control strategy is adopted, and the non-disturbance switching of the control is realized through the state judgment conditions.

[0054] refer to figure 2 As...

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Abstract

The invention discloses a heating furnace control and combustion optimization method. The problem that a heating furnace system is not easy to control is solved. A control strategy combining an advanced control algorithm and a conventional control algorithm is adopted, and continuous stable operation of the heating furnace system is ensured. O2 and CO switching control is used, and low-oxygen combustion is achieved. A national standard simplified formula serves as an optimized target. Real-time optimization of the oxygen content in flue gas is achieved through a self-optimization algorithm, and the aim of economical combustion is achieved.

Description

technical field [0001] The invention relates to the technical field of industrial automatic control, in particular to a heating furnace control and combustion optimization method. Background technique [0002] Heating furnace is one of the main equipment in petrochemical refineries and chemical production plants, and is a kind of thermal heating equipment that is often used. The most important task of the heating furnace is to heat the raw oil to a relatively high temperature (sometimes up to 1000°C) to meet the requirements of the subsequent production process (fractionation or reaction processes). Heating furnace not only consumes a lot of energy, but also is one of the main sources of carbon dioxide, nitrogen oxides and other pollutant emissions. [0003] The main factors affecting the thermal efficiency of the heating furnace are the heat loss of exhaust gas and the heat loss of incomplete combustion of the gas, and the adjustable parameter affecting these two main fact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N5/00
CPCF23N5/00F23N5/003F23N2223/10F23N2223/44Y02E20/34
Inventor 崔栋刚李瑞兔程向龙李金刘文豪
Owner XIAN IBL TECH DEV
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