Function Of Fuel And Spare Parts Of Gas Burner In Daily Use
Function of fuel and spare parts of gas burner in daily use
Common burners include oil burners and gas burners. The fuel of gas burner includes natural gas, liquefied gas, and city gas. The following is mainly about the role of fuel and spare parts of gas burners in daily use.
Natural gas: Natural gas refers to the gas fuel directly obtained from nature, that is, the gas that can only be exploited and collected basically. The main component of natural gas is methane.
Liquefied gas: Liquefied gas is a part of hydrocarbons obtained as by-products in the process of petroleum exploration and refining. The main components of liquefied gas are propane, propylene, butane, and butene. Liquefied gas is transformed from gas to liquid, and its volume is reduced by 250 times.
City gas: City gas refers to the gas processed and produced with coal as raw material. Its main components are hydrogen, carbon monoxide, etc.
Gas burners can be divided into diffusion type, normal pressure type, and flameless type according to the combustion mode. Diffusion type: air required for combustion is not premixed with gas Atmospheric type: some air required for combustion is premixed with gas Flameless type: all air required for combustion is premixed with gas
The gas burner can be divided into two-stage regulation and proportional regulation according to its regulation mode. The two-stage burner can only be divided into the high fire and low fire; The proportional burner can work at any load point.
Composition of gas burner: generally, it is composed of burner shell, programmable controller, fan, servo motor, gas butterfly valve, combustion head, ionization electrode or ultraviolet lamp, flame stabilizing plate, and gas valve (including ball valve, expansion joint, filter, pressure regulating valve, solenoid valve, ignition solenoid valve, etc.).
Functions of each part of the burner: the shell of the burner is the carrier of each part, and many parts are fixed on the shell; The program controller is a device used to control the ignition program of the burner; The drive impeller of the fan room provides sufficient air for combustion; Servo motor is used to control the opening of the air valve and gas butterfly valve, that is, to control the proportion of air volume and gas volume to achieve complete combustion. The ionization electrode, ultraviolet lamp, and oil burner combined with the electric eye have the same function. They are used to detect the presence of flame. If the flame does not exist, it will be shut down for protection; The combustion head is provided with a pair of ignition electrodes and a gas nozzle, which outputs high-voltage ignition through the transformer to ignite the gas ejected from the nozzle; The flame stabilizing plate is a device used to adjust the ratio of direct current and cyclone; The ball valve in the gas valve group is a cut-off device for gas supply and cutting off the gas when not in use; During installation, expansion joints are used to reduce the generation of gas valve groups. The filter is used to filter impurities in the gas to prevent impurities from damaging the equipment; The regulating valve can be used to regulate the gas pressure from the gas pressure regulator to make the pressure suitable for the gas consumption of the burner; Ignition solenoid valve is used to release ignition gas and ignite small fire first;
Burner operation program: after the burner is started, the output signal fan of the burner program controller starts to operate, and the servo motor drives the air valve to the full load position for pre-purging. After pre-purging, the servo motor drives the damper back to the ignition position. At this time, the high-voltage ignition electrode output by the ignition transformer is ignited, and the ignition solenoid valve opens the branch gas at the same time. If the ignition is successful, the main solenoid valve will be opened to ignite the flame, and then the program will continuously change the load according to the heat demand. If the ignition is unsuccessful and the ionization electrode or electric eye cannot detect the flame, the program is terminated and the solenoid valve is closed.