Natural gas burner is the common name for natural gas combustion device in industrial kilns and chemical heating devices, and it is an important equipment in industrial kilns. The following will analyze the structure diagram of natural gas burner.
1. Definition and principle of natural gas burner
A natural gas burner is a combustion device installed on a heating furnace or kiln. Its primary function is to mix natural gas with air and ignite it to produce a high-temperature flame for heating the furnace. The characteristic of a high-speed burner is that the combustion gas outlet can reach speeds over 100 meters per second. By using combustion air, the temperature of the exiting gas is reduced to a level close to that of the workpiece being heated. High-speed burners promote rapid circulation of hot gases within the furnace, ensuring uniform temperature distribution and reducing the temperature difference between the flame and the workpiece, effectively improving the thermal efficiency of the furnace.
2. Technical parameters of natural gas burner
Gas types: natural gas, liquefied petroleum gas
Gas pressure: natural gas, liquefied petroleum gas 5.0–6.0KPa around
Combustion air pressure: about 5KPa
Gas flow rate: 100 m/s
Burner adjustment ratio: 1:10
3. Structure of natural gas burner
The natural gas burner is mainly composed of the following parts:
Burner shell: protect the internal components and prevent heat loss.
Combustion tube: Guide the flow of combustion gas.
Gas cap: controls the speed and direction of gas spray.
Air cyclone plate: promote the mixing of air and gas.
Ignition electrode: generate an electric spark to ignite the gas.
Detection electrode: detection of the presence of flame.
Watch the fire mirror: observe the state of the flame.
4. Classification of natural gas burners
According to different classification criteria, natural gas burners can be divided into the following categories:
Classification by natural gas pressure:
Low pressure natural gas burner: natural gas pressure is below 5kPa.
High pressure natural gas burner: natural gas pressure above 5kPa.
Classification by flame shape:
Straight flame burner: also known as long flame burner, the flame is longer, generally used in kilns.
Short flame burner: the flame is short and rigid.
Flame burner: a circular disk that extends evenly in all directions from the wall or top of the furnace.
Classification by air supply mode:
Self-priming burner: the burner does not need to rely on external force to mix air, its own Venturi structure can absorb external air, and the power of the burner is generally small.
Blade burner: relying on the forced combustion air by the blower, which is usually a high-pressure centrifugal fan.
Classification according to air-fuel mixture:
Diffused burner: The air needed for combustion is not pre-mixed with natural gas.
Atmospheric burner: also known as semi-premixed natural gas burner, the air required for combustion is mixed with natural gas.
Fully premixed burner: The air needed for combustion is mixed with natural gas in advance, and is generally used in flameless combustion types of burners.
Classification by special function:
Thermal storage burner
Radiating tube burner
Adjustable temperature burner
Low nitrogen burner and other new energy saving burner.
5. Characteristics of natural gas burner
Modular design and production: simple structure, easy maintenance, easy operation.
Air and gas are initially mixed inside the burner: so that the gas burns fully, the flame is stable, no backfire or fire off.
6. Application of natural gas burner
Natural gas burner is suitable for forging heating furnace, workpiece heat treatment furnace, mold shell baking furnace and other types of furnaces. The conventional models are 150kw, 230kw, 320kw, 450kw, 630kw, 1000kw, etc., can be customized according to the customer's furnace condition.
Through the above analysis, we can have a more comprehensive understanding of the structure and working principle of natural gas burner, so as to better apply and maintain this important equipment.
