Can the CDI exhaust recovery system handle N2?
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The synthetic exhaust gases are sent to the CDI exhaust gas recovery system for treatment. During the driving phase, the synthesis furnace uses N2 to transport silicon powder; if N2 enters the CDI exhaust gas recovery system, can it be handled? Is N2 exhausted along with H2? Is the processing capacity of N2 equal to the designed molar amount of H2? What impact will N2 entering the CDI exhaust recovery system have on the system?
Definitely not; it will not affect product quality
Reply to 2# Wind and Rain Without Clear Sky: Could you be more specific? Why not? Which products do factors affecting quality refer to? HCL and chlorosilanes? H2 is directly vented.
The adsorption tower cannot handle nitrogen! Can only be left blank
Vent it together with H2? So how does CDI recover hydrogen?
Yes, N2 and H2 are vented together. The H2 recovered from synthetic exhaust is generally not used.
Hehe, first tell me if the compressor is working or not. If it’s not working, then it doesn’t matter to drain it; but if the compressor is working, then there should be no nitrogen present.
Reply to 7# shui*n1219: Since the amount of exhaust gas generated is very small, it does not pass through the compressor.
Synthetically produced hydrogen and hydrogen recovered through reduction hydrogenation are not stored in the same hydrogen buffer tank. Also, considering cost factors, synthetically produced hydrogen is generally not recycled
It may affect the quality of hydrogen recovered from the synthetic exhaust gas; if it is reused, it could accumulate within the system and ultimately impact the quality of the product.
N2 enters the reduction system and reacts with silicon at around 1400 degrees to form nitrides, which create nitride interlayers in the silicon rods; this affects the drawing process of single crystals and is also detrimental to production.