Problems with installing one-way valves at process waste gas outlets
Thread Content
For factory waste gas treatment, because the centralized treatment facility only has one RTO, waste gases from different areas need to be led to the RTO through induced draft fans. At this time, the balance and efficiency of the induced draft fan and RTO fan need to be considered. In order not to cause a loss of air volume from the RTO fan, when no exhaust gas is generated in a local area, the induced draft fan in this area is temporarily turned off (but the induced draft fans in other areas are turned on), but this area is connected to the main RTO pipeline. At this time, part of the air volume from the RTO fan will be misdirected to this area, causing waste. Considering economy, is it possible to add a one-way valve to the connection? Only when the pressure of the induced draft fan (positive pressure) reaches a certain value, the one-way valve will open and the channel will open. ； When the pressure is not enough, the one-way valve is closed and the channel is closed, without causing waste. Of course, this can also be controlled through the linkage of induced draft fan + electric valve, but the cost will increase. With full consideration of economy, is there such a purely mechanical one-way valve that can solve this problem? ? (Note: The one-way valves I searched on the Internet are all used for water, steam or solvents, etc. There is no one-way valve with relatively low air pressure. I saw the type of range hood and thought it could be used by civilians. For industrial use, the sealing feel is much worse. ) Seek advice from experts online
Also asking, is there a one-way valve with lower pressure drop suitable for use in the exhaust gas collection process?
Yes, it's just the kind of plate valve commonly used on flue gases. It's a bit like a shutter, but it's not very accurate.
The air duct one-way valve can be used instead of the interlock valve. This is a cheap way to think about it. It is not very accurate and leaks air. It is safer and can also reduce the accumulation of condensation.
A one-way valve, similar to a one-way plate, has been used on low-pressure nitrogen. . . . Not too strict. . .
I know that the minimum opening pressure of the one-way valve in the instrument pipeline can reach 0.03barg.
It looks like something, please post it if you can. . My caliber is 100mm, which is not very big.
I have considered a fire damper similar to a fire smoke exhaust pipe, but it feels too crude. . It doesn’t fit the temperament, haha. . . When installed outdoors, it looks thin. In fact, the principle is very simple. I am considering making it myself using flanges, pipes, and PTFE pads. . There is no requirement for tightness, but it does require no leakage outdoors and a longer service life. .
Use non-standard parts and be more meticulous in workmanship to make up for it.~
An air inlet check valve was made as a non-standard part before, and the effect was OK, but the sealing performance was not very good. For economic reasons, you can try to use it.
The domestic machining and manufacturing process is not very good, especially the tolerance fit/accuracy~ I don’t know if it is feasible to add sealing washers.