Excess air coefficient management system for kiln

Abstract

The invention discloses an excess air coefficient management system for a kiln. The excess air coefficient management system comprises a burner arranged in the kiln, a thermocouple, a temperature control instrument, a fuel gas actuator, a fuel gas proportional valve, an air actuator and an industrial personal computer. The fuel gas actuator and the fuel gas proportional valve are connected to a fuel gas pipeline of the burner in series one after another. The air actuator is connected to an air pipeline of the burner in series. An air pressure detection device of the fuel gas proportional valveis connected with the air pipeline of the burner. The thermocouple, the industrial personal computer, the fuel gas actuator and the air actuator are connected with the temperature control instrument.According to the baking technology of green bricks, burner sets have different optimal air-fuel ratios during the different firing stages. Meanwhile, when the kiln is not in operation, the burner isin a low fire state, combustion-supporting wind can achieve automatic adjustment and the optimal ratio of fuel gas. The whole process is completely controlled by the program edited in advance, precisecontrol over excess air coefficients is achieved, the stability of temperature of the hearth is ensured, the firing efficiency is improved, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of kilns, in particular to a management system for controlling the combustion of a kiln. Background technique [0002] The excess air coefficient of the kiln is generally controlled within a certain value range during combustion. If the air excess coefficient is too small, the combustion will be incomplete, and fuel will be wasted; if the air excess coefficient is too large, too much air will enter the furnace, the temperature of the furnace will drop, the heat transfer will be poor, and the flue gas will take away more heat, which will waste energy. [0003] However, it is difficult to precisely control the excess air coefficient in existing kilns, resulting in unstable furnace temperature, poor firing effect and high energy consumption. Therefore, it is necessary to develop a management system that can be used to precisely control the excess air factor of the kiln. Contents of the invention [0004] Th...

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Problems solved by technology

If the air excess coefficient is too small, the combustion will be incomplete, wasting fuel, if the air excess coefficient is too large, too much air will enter the furnace, the temperature of the furnace will drop, the heat transfer will be poor, th

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