Structural Analysis and Characteristics of Industrial Natural Gas Burners
Industrial natural gas burners have advantages such as high thermal efficiency, good safety performance, strong reliability, high degree of automation, simple operation, convenient maintenance, and low noise.
Burners can be divided into:
a. Diffusion burner
b. Partial premixed (atmospheric) burner
c. Power burner
Among them, atmospheric combustion is divided into natural jet type and blast type
1、 Characteristics of natural gas burners
(1) High thermal efficiency: able to adapt to pressure fluctuations, self adjust the air distribution (i.e. high gas pressure, high inlet air volume; low gas pressure, low inlet air volume), sufficient combustion, high thermal efficiency;
(2) High safety: The burner is equipped with small firepower. When starting the boiler, light the small fire first. When a small fire burns normally and stably, the automatic control system opens the main gas valve to allow fuel to enter the boiler for normal combustion without deflagration;
(3) Strong fuel adaptability: This type of burner can be suitable for various types of gas, such as natural gas, liquefied petroleum gas, coal gas, and liquefied petroleum gas mixture, with only a small number of components replaced.
2、 Air valve group
The boiler can be directly connected to a low-pressure gas pipeline without the need for a pressure regulating station. The gas valve is a low-pressure valve. The gas valve consists of three parts: (1) manual valve, (2) 24V electric valve, (3) gas pressure regulating valve (some models of boilers have the same electric valve and pressure regulating valve), and the maximum gas pressure can be set to switch or the minimum gas pressure switch according to user requirements;
The gas pressure regulating valve requires 5 to 11 inches of water column (127mm water column -279.4 mm water column) in front of the valve, and the valve pressure should not be less than 3.5 inches of water column (88.9 mm water column). The pressure of liquefied petroleum gas valves requires 11 inches of water column;
3、 Air cut-off protection device
The gas pipeline is equipped with a maximum pressure switch and a minimum pressure switch. When the gas is cut off or the gas pressure drops to a certain value, the minimum pressure switch acts and the system automatically shuts down; When the gas pressure is too high, the maximum pressure switch is activated and the system automatically shuts down.