How to determine the air supply volume by monitoring the temperature changes in the exhaust furnace
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How can one determine whether the air supply volume is too high or too low by adjusting the temperature of the exhaust furnace? Both too high and too low air supply amounts can lead to poor reactor performance, resulting in an increase in the temperature of the exhaust furnace. There is no on-line ratio analyzer available; could someone with experience give some advice? :handshake Last edited by Ma Hai on 2009-3-16 23:20 ]
It makes sense to determine whether the air supply volume is too high or too low by increasing or decreasing the temperature of the exhaust furnace. If there is too much air, sulfur dioxide will raise the temperature of the exhaust furnace, while the temperature will drop otherwise; inversely, it will rise. Both too high and too low air supply amounts can result in poor reactor performance. This is because the imbalance in the ratio of H2S to SO2 results in poor reaction performance in the reactor.
1. It is possible to determine whether the air supply is too large or too small by checking the temperature of the sulfur production reactor. Generally, when the processing load remains relatively stable and the air supply is appropriate, the temperature inside the furnace also remains stable. When the hydrogen sulfide concentration in the acidic gas remains relatively stable, the air supply amount can be determined based on the furnace temperature. If the furnace temperature is too high, it indicates that the air supply is excessive; if the furnace temperature is too low, it means the air supply is insufficient. 2. It is possible to determine whether the air supply is too large or too small by examining the temperature rise of the converter; the greater the temperature rise, the better the air supply. 3. Determine whether the air supply is too large or too small by checking the temperature rise in the hydrogenation reactor. A normal temperature rise in this reactor is around 30°C; if the rise is too high, it indicates that the air supply is excessive, while if the rise is too low, it means the air supply is insufficient. 4. The temperature at the bottom of the exhaust gas absorption tower can be used to determine whether the air supply is too high or too low. Exhaust gas absorption is an exothermic reaction; when the temperatures of the exhaust gas and the lean liquid remain relatively stable, if the temperature at the bottom of the absorption tower is too high, it indicates an increase in the hydrogen sulfide content in the exhaust gas. By considering the temperature rise in the hydrogenation reactor, it is possible to determine whether the air supply is too high or too low. If the temperature rise in the hydrogenation reactor is too high, it means the air supply is too high; if the temperature rise is too low, it means the air supply is too low. Of course, the parameter that responds fastest is the temperature in the furnace of the sulfur production reactor; other phenomena exhibit a delay, and if air distribution is adjusted too frequently, these differences become indistinguishable.
The temperature of the exhaust furnace cannot be used to determine the air supply volume; it is primarily regulated by the amount of fuel gas used. The exhaust gas passes through a converter, undergoes hydrogenation reactions and absorption processes; there are many more direct factors that can affect the temperature of the exhaust gas furnace. As mentioned above, it is determined whether the air supply volume is appropriate through an acid gas furnace, a converter, and a hydrogenation reactor.