Burner is a general term for a device that makes fuel and air eject and burn in a certain way. According to the type and application field, the burner is divided into industrial burner, burner, civil burner and special burner. It is mostly made of corrosion-resistant and high temperature resistant materials such as stainless steel or metal titanium.

The function of the burner is to atomize the sample through flame combustion. The atomized test solution enters the burner. Under the action of flame temperature and flame atmosphere, a large number of ground state atoms, as well as some excited atoms, ions and molecules are produced through the processes of drying, melting, evaporation and dissociation. A well-designed burner should have the performance of high atomization efficiency, low noise and stable flame, so as to ensure high absorption sensitivity and measurement precision. Slit burners are often used to produce atomic vapor in atomic absorption spectrometry. According to the types of gas and auxiliary gas used, the length and width of the burner gap are different. Generally, the applicable gas and auxiliary gas are marked on the burner.

In the broad concept of burner, domestic water heater, gas stove and even lighter can be regarded as a kind of burner. According to its working principle, the burner can be defined as a kind of equipment that converts substances into heat energy through the chemical reaction of combustion - that is, air and fuel are mixed in an appropriate proportion through the premixing device to make it burn fully. Burners have a variety of classification methods according to their different properties. According to the fuel mode, it is divided into oil burner, gas burner, light oil burner and dual fuel burner. Among them: in specific applications, oil burners will be divided into light oil burners, heavy oil burners, etc; Gas burners are divided into natural gas burners and city gas burners. According to the combustion control mode of burner: single-stage fire burner, double-stage fire burner and proportional regulation burner. According to the fuel atomization mode, it is divided into mechanical atomization burner and medium atomization burner; According to the structure, it is divided into integral burner and split burner. The split burner is mainly used in industrial production. Its main feature is that the combustion system, air supply system and control system are disassembled and installed. This kind of machine is mainly suitable for large equipment or special working environment such as high temperature.

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