Blowing-type burner control method

Abstract

The invention relates to a blowing-type burner control method which comprises the following steps that an electric controller receives an ignition instruction and conducts slash fire detection, overheat detection and draught fan rotating speed detection sequentially; the electric controller controls an air blower to blow and sweep a combustion box at the rotating speed a; the electric controller controls the rotating speed of the air blower to be a set ignition rotating speed b, an igniter is started, a power shut-off valve on a gas proportion valve assembly is controlled to be opened, and an electric adjustment opening in the gas proportion valve assembly is opened to an ignition opening degree according to a set ignition current; after the successful ignition, the electric controller synchronously controls the opening degree of the electric adjustment opening and the rotating speed of the air blower according to the burning power input by a manipulator; when the electric controller receives a stop work instruction from the manipulator, the gas proportion valve assembly is closed and the air blower continues to run for set period of time. Compared with the prior art, the blowing-type burner control method has the advantages of being high in heat exchange efficiency, high in safety and the like.

Description

Technical field [0001] The invention relates to a combustion control method, in particular to a control method of a blast burner. Background technique [0002] Nowadays, the usual blast burner adopts the diffuse blast combustion method. This mechanism is simple and convenient to manufacture, but it has low combustion intensity. The combustion requires a large body and consumes a lot of materials. In order to achieve sufficient combustion, it must be supplied with more Excessive air-the size and power of the fan must be increased, the combustion temperature is low-the thermal efficiency is low, etc. The main reason is that the flame burns under the support of the surrounding air after ignition, and the formed flame has a kind of isolation from the air The effect makes it difficult for air to enter the center of the flame and fully contact the gas to achieve complete combustion. [0003] The current method is to greatly increase the air supply. Through the supply of a large amount o...

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Problems solved by technology

[0002] Nowadays, the usual blast burner adopts the diffusion blast combustion method. This kind of mechanism is simple and easy to manufacture, but it has low combustion intensity, and the combustion requires a large volume of the mechanism and consumes a lot of materials. In order to make the combustion complete, it must be supplied Too much excess air - the size and power of the fan must be increased, low combustion temperature - low thermal efficiency and other defects, the main reason is that the flame burns with the help of the surrounding air after ignition, and the formed flame has a kind of isolation from the air The function makes it difficult for the air to enter the center of the flame and fully contact with the gas to achieve complete combustion

[0003] The current method is to greatly increase the air supply. Through the supply of a large amount of air, the contact probability between the gas flame and the combustion air will increase. The flue gas is diluted by air to cool down, and the phenomenon that occurs during specific use is that the temperature of the flame drops. According to the theory of heat transfer, the greater the temperature difference between the two cold and hot media, the higher the heat exchange efficiency, so the flame temperature decreases during use. The heat exchange between the process and the pan on the stove becomes poor, so the thermal efficiency is low

[0004] In order to make the burner operate efficiently and stably, Chinese patent CN103629692A discloses a decentralized control method for boiler burners. This method can efficiently perform centralized control of the production process by collecting and monitoring relevant data of boiler burners. method does not solve the problem of incomplete combustion

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