Problems with the fume exhaust fans at Huali Gas Station? ? ?
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The intake pipe of the fume extractor is connected to a pipeline equipped with a valve that allows communication with the atmosphere. Is this valve open under normal conditions? If it is turned on, the purpose is to mix with the cooking fumes in order to lower the temperature, which facilitates separation in the separator. If it isn’t turned on, when there is a problem with the fan, it’s better to let the grease fumes escape directly into the atmosphere; that’s the correct approach. Welcome friends to offer suggestions ..........
It should be on, right! What you said, “If it doesn’t start, it means there’s a problem with the fan; in that case, just release the fumes directly into the atmosphere,” but how can they be released directly into the atmosphere?
The valve at that location is a one-way valve; it is normally closed and is installed solely to prevent the fuel tank from overpressuring when the fan stops operating
When the fume extractor is operating normally, this valve is closed. When the fume exhaust fan fails, this valve should be opened promptly to allow the fumes to be discharged directly, preventing poor oil return in the air compressor.
We keep this valve open; in my opinion, the fume extractor is used to maintain a certain negative pressure in the oil tank – it’s not the case that the lower the pressure, the better. There is also a baffle at the oil tank outlet for control, so this valve must remain open
This post was last edited by tanxjzm on 2011-4-29 at 19:43. Let me try to explain it: it’s best to keep this valve at a certain opening degree. In fact, it’s a bypass pipe; when the fume extractor is in operation, adjusting the opening degree of this valve allows for control of the air volume entering the extractor, thereby meeting the requirement for a slight negative pressure in the fuel tank. If this valve is closed, it may cause excessive negative pressure in the fuel tank, which in turn can lead to other problems. Hehehe
What the friend on the 6th floor explained makes some sense; I’ll ask the manufacturer in the future. Thank you everyone..................
When the fume exhaust fan is in operation, the opening of this valve is adjusted to control the air volume entering the fan, thereby meeting the slight negative pressure requirement of the oil tank and ensuring smooth oil return. . . . .
What’s said on the 6th floor makes sense; it’s used mainly to adjust the level of negative pressure. Also, please discuss whether there is any protection mechanism to prevent the fuel tank from overpressuring in case of fan failure
The function of this valve is to regulate the negative pressure in the fuel tank; by adjusting the degree of opening of the valve, it is possible to control the negative pressure in the fuel tank. During normal operation, the valve must be kept at a certain opening degree.