Information on the use of natural gas-fired heaters
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1. What kind of burners are used in heaters fueled by natural gas? 2. What problems have arisen in the operation of natural gas-fired heaters? 3. What is the typical range for the oxygen content in heaters that use natural gas as fuel?
1. Gas burners can use various gas fuels, and the quality of combustion depends on accurately considering the properties of the fuel. 2. Natural gas as a fuel does not impose any special requirements on burners; however, if the sulfur content in the gas is high, corrosion of the lining and the energy recovery system must be taken into account. Generally speaking, if it is transported together with household fuels, it should be desulfurized at the source. 3. The oxygen content in heaters that use natural gas as fuel is at the same level as that in conventional gases
What kind of burners are used in natural gas-fired heaters? There are many types of gas appliances: 1. Classified by combustion method: (1). Diffusion combustion – the air used for combustion is not mixed with the gas in advance. (2). Atmospheric type: Part of the air used for combustion is mixed with the fuel gas. (3). Fully premixed: All the air used for combustion is thoroughly mixed with the fuel gas. 2. Classified by air supply: (1) Induction type ； (2) Self-ventilated type ； (3) Blower type: There are many other classifications as well. The type to be selected is determined based on the source and condition of the fuel gas. Precautions: The combustion must be stable, with no backfire or flameout; the flame must not come into direct contact with the equipment. The air excess coefficient varies depending on the device and its intended use. Box furnace control for methanol production from natural gas: 2–5%
Natural gas is used too frequently as a fuel. Non-premixed types are generally cleaner, with low sulfur content; the residual oxygen level is 3-5%, which is similar to that of ordinary furnaces. Forced ventilation systems are better than those with natural ventilation
1. There are too many types of burners, so it’s impossible to give a specific answer; it depends on the specifics of your project； 2. Operational issues: Ignition is used to prevent explosions; for normal operation, just pay attention to the natural gas pressure ； 3. If your furnace has residual oxygen analysis, the lower the value, the better – after all, complete combustion is what we strive for.
At present, domestic brands of gas burners are not yet mature as they are still in the imitation stage; from the perspective of boiler manufacturers, they mostly choose German Viessmann and Finnish Orin； Due to safety and reliability concerns, careful selection is essential.