Why screw vacuum pumps are not suitable for pumping explosive gases
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Could everyone discuss the safety risks associated with using vacuum pumps to extract flammable and explosive gases, as well as the mechanisms behind explosions?
It’s likely to cause leaks; leaks into the air can lead to explosions. Additionally, high pump temperatures are also a source of safety risks
For handling such highly hazardous substances, it’s better to use a shielded pump
Water ring vacuum pumps possess excellent isothermal compression properties, making them suitable for use in environments with flammable and explosive gases, as well as those containing water and dust.
A screw vacuum pump operates by means of two intermeshing screws – a left screw and a right screw – that rotate in opposite directions synchronously through gear drive, at high speeds. The pump casing and these intermeshing screws divide the spiral grooves into multiple chambers, thereby creating multiple stages. Gas moves within these equal-sized grooves (with a constant pitch, such as cylindrical), but no compression occurs; only the spiral structure at the very end of the screws exerts compressive force on the gas. A pressure gradient can be created between the various stages of the screw to distribute the pressure difference and increase the compression ratio. The clearances between various components and the pump speed have a significant impact on the pump’s performance.
Due to the [mutual engagement of gears rotating in opposite directions synchronously], failures may occur, resulting in sparks.
Agree with the 4th floor; claw-type vacuum pumps (dry vacuum pumps) work too.
What people actually know is only one-sided; dry vacuum pumps are suitable for any flammable or explosive gases. There are gaps between the pump’s rotors, and in a vacuum environment (with no air present), there is no possibility of combustion.
What if there is a leak in the front section? In other words, the air cannot be completely isolated
Even if there is a leak at the upstream end, the air that enters is expelled through the pump body under the operation of the vacuum pump, thereby ensuring safety