December 4, 2010 (One Question per Day)
Thread Content
There are many methods for raising the temperature of sulfur production furnaces. One of them uses the air flow method. Why does the shunt method increase the furnace temperature? Detailed explanation: Active participation
By using air circulation, the flow rate of air inside the furnace can be increased, thereby raising the oxygen density within it; this ensures complete combustion and an increase in furnace temperature. I’m not sure if it’s like this~ Let’s discuss it with everyone~
The shunting method results in excessive air supply to the acidic gases at the front, leading to very high temperatures and the generation of large amounts of sulfur dioxide there. The acidic gases entering from the middle section produce a smaller amount of sulfur dioxide; as a result, the ratio of hydrogen sulfide to sulfur dioxide throughout the process remains around 2, before the mixture proceeds to the subsequent reactors for further reaction.
This method is designed for devices with relatively low concentrations of acidic vapor, with the aim of increasing the hydrogen sulfide content in the acidic vapor in the rear section； To increase the temperature of the reaction furnace.
The purpose of raising the furnace temperature is to improve the ammonia combustion efficiency; all ammonia-containing gases are fed into the front section, and after being mixed with a portion of the cleaned acidic gases, they undergo peroxide combustion to raise the furnace temperature, while a part of the cleaned acidic gases is diverted and fed into the middle section.
Shunt control is a control method for furnaces that require ammonia combustion. Since ammonia combustion requires a temperature of 1350 degrees, it is difficult to maintain this temperature when one-third of the acidic gas is burned; therefore, the acidic gas containing ammonia is directed into the acidic gas combustion furnace where it burns completely, producing sulfur dioxide and thus helping to keep the furnace temperature around 1350 degrees. At the same time, the ammonia in the acidic gas is burned off. From the middle part of the furnace, a cleaner acidic gas free of ammonia, derived from solvent regeneration, is introduced to neutralize all the sulfur dioxide produced in the front section, so that the overall ratio becomes 2:1. This mixture then enters the CLAUS reactor for further reaction.