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author： 2020-05-11
To understand one thing as a substitute for another, we first need to know the characteristics of the two things themselves and the similarities between them.Today, broad heat can talk about yellow phosphorus tail gas as an alternative fuel for boiler burners.
In the past, when the technology was not very developed, the fuel of boiler burners was mostly limestone, and the combustion process of limestone was simply a process of absorbing heat and discharging a large amount of CO2.The main factors affecting the combustion of limestone are calcination temperature, the particle size of limestone and the mixing uniformity of limestone and fuel.During the calcination of limestone, the limestone blocks begin to burn at the beginning of the combustion zone.At present, the thermal requirements of most lime kilns are summarized as the calcined temperature of about 900℃, the calcined temperature of about 1000℃, and the calcined temperature of about 130℃.
The volume fraction of CO in yellow phosphorus tail gas is 80%~90%.In the past, the treatment method of yellow phosphorus tail gas was "sky lamp", that is, after simple water treatment, it was directly burned and emptied, which not only failed to realize the comprehensive utilization of resources, but also seriously polluted the environment.The combustion temperature of yellow phosphorus tail gas can reach about 920℃, the flame length is about 250mm, the width is about 30mm, and it has a wide thermal radiation area.Yellow phosphorus tail gas burner is a good way to recycle as fuel resource.Lime is produced by lime kiln. The theoretical decomposition temperature of limestone is 800℃~1000℃, the actual calcined temperature of lime is 900℃, and the furnace temperature is about 1000℃. Therefore, yellow phosphorus tail gas can be used as an alternative fuel in the burner process of boiler burners when certain conditions are met.
The purified yellow phosphorus tail gas meets the basic requirements for alternative fuels in the burner kilns of limestone boilers, and the combustion temperature of the purified yellow phosphorus tail gas can meet the temperature required by the lime calcination process under certain conditions (such as adjusting the excess air coefficient and yellow phosphorus tail gas flow rate).
Through the above analysis, we understand that burner manufacturers can fully utilize the thermal energy of yellow phosphorus tail gas in a reasonable form of heat recovery equipment, so as to produce steam and provide low-cost thermal energy for chemical production.