This thread is being broken off from the consolidation of gold loss thread to make it easier to compartmentalize by topic.
My original question to Gold Refinery was;
"There are a few technical specifications we need to know about the fume scrubber to evaluate it properly. We need to know the air flow rate through the scrubber, probably expressed in cubic meters per hour. Then we need to know the cross sectional area of the packed section of the scrubber. The packed section is the area that contains the tower packing where the chemical reactions take place. To effectively scrub NOx fumes they have to remain in the "scrubbing zone" inside the scrubber for about 8 seconds. If we know the actual area of the packing and the flow rate we can see if the scrubber has the necessary retention time for effective scrubbing of NOx. Finally, is there a pH controller and dosing pump to maintain the pH of the scrubber liquid?"
His response was;
Yes,We have a dosing pump that regulates the pH of the water inside the scrubber. Of course, for the first pair of scrubbers, the second pair of scrubbers do not have pH control with the dosing pump.
In the tank of the first pair of scrubbers, ammonia is added to control the pH of 7. In the tank of the second pair of scrubbers, there is a caustic soda.
The white smoke I mentioned earlier comes out of the chimney (at the peak of the reaction), after the addition of ammonia. The smell of chlorine gives very little.
The electric motor has an inverter to regulate the air flow.
My original question to Gold Refinery was;
"There are a few technical specifications we need to know about the fume scrubber to evaluate it properly. We need to know the air flow rate through the scrubber, probably expressed in cubic meters per hour. Then we need to know the cross sectional area of the packed section of the scrubber. The packed section is the area that contains the tower packing where the chemical reactions take place. To effectively scrub NOx fumes they have to remain in the "scrubbing zone" inside the scrubber for about 8 seconds. If we know the actual area of the packing and the flow rate we can see if the scrubber has the necessary retention time for effective scrubbing of NOx. Finally, is there a pH controller and dosing pump to maintain the pH of the scrubber liquid?"
His response was;
Yes,We have a dosing pump that regulates the pH of the water inside the scrubber. Of course, for the first pair of scrubbers, the second pair of scrubbers do not have pH control with the dosing pump.
In the tank of the first pair of scrubbers, ammonia is added to control the pH of 7. In the tank of the second pair of scrubbers, there is a caustic soda.
The white smoke I mentioned earlier comes out of the chimney (at the peak of the reaction), after the addition of ammonia. The smell of chlorine gives very little.
The electric motor has an inverter to regulate the air flow.