Three-in-one furnace for hydrochloric acid production
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Ignition is done on the three-in-one furnace; for external ignition, I would like to ask whether the pump needs to be turned up further when adding more material to this type of furnace
Increase the amount? Should the amount be increased when starting up the furnace, or at normal production levels?
It shouldn’t be necessary; it’s important to maintain stable suction force, right? That’s my personal opinion.
Could you explain these two situations separately? Thank you
This post was last edited by Du Xiaoping on 2017-2-14 at 08:46. I agree with what was said on the third floor: when driving the equipment, it is necessary to maintain a somewhat higher suction level, as the flow meter has a minimum display value. At first, the flow rate may be very low or not shown at all; by the time a value is displayed, it is already relatively high and normal operation has been achieved. It is important to keep the suction level stable. Once normal operation is reached, it is necessary to increase the flow rate. Raising the hydrogen and chlorine flow rates in the synthesis furnace to higher levels in a short period of time might, due to human error in operation, result in insufficient water absorption, which could lead to the release of hydrogen chloride gas. Increasing the suction level is also one way to address this issue.
As the jet pump is opened further, the negative pressure in the furnace increases. But in order to maintain the furnace pressure, should the hydrogen flow be increased as well? The jet pump only extracts the excess hydrogen.
There is a specific ratio required for hydrogen and chlorine; using too much hydrogen may be unsafe. The three-in-one furnace operates under slight negative pressure; too high a negative pressure can lead to incomplete combustion ； With positive pressure, the flame moves upward and burns the equipment. Therefore, the standard procedure is to adjust the hydrogen-to-chlorine ratio first, and then adjust the jet pump according to the desired level of negative pressure.
We have a large excess of hydrogen; the hydrogen content in the exhaust gases is kept at 80%. How accurate are the flow meters for hydrogen and chlorine?
Adjust the hydrogen valve based on the hydrogen content in the exhaust gas; at this point, note the value displayed by the flow meter to determine a ratio, and make the adjustments according to that ratio.
We haven’t done it; I think the hydrogen content in the exhaust gases should be controlled at 80%, and there shouldn’t be too much excess hydrogen, because after hydrogen reacts with chlorine or oxygen, the remaining impurity gases are almost entirely hydrogen.
I’m confused; our usual requirement is below 15%, you know. The hydrogen excess is way too much, isn’t it?