Control of oxygen content in tubular natural gas heaters
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There is a tubular natural gas heater on site, used to increase the superheat of medium and low pressure steam. Under full and low load conditions, the oxygen content in the furnace chamber is around 10-15%. I would like to ask the experienced experts on this forum: what should be the appropriate range for oxygen content control, and what are the relevant standard requirements or empirical values? Please advise
At full load operation: Under full load conditions, the oxygen level in the furnace can be maintained between 3% and 4%. This range ensures complete combustion of the fuel while maintaining high thermal efficiency. During low-load operation: In this condition, as fuel consumption is reduced, there is an adequate supply of oxygen in the furnace. At this point, the oxygen content control range can be appropriately reduced, but it should not be set too low to avoid incomplete fuel combustion. It is generally recommended to keep it between 2% and 3%.