Chlorine pressurized transportation
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At present, we have a chlorine-air mixture of 600 kg/hr at atmospheric pressure that is required as recycle gas, with a chlorine mass fraction of approximately 20%. I want to choose a blower with an outlet pressure of 0.2 MPa (absolute pressure). I’ve looked at many blower manufacturers, but their output pressure generally doesn’t meet this requirement; do I need to use a booster pump or a compressor instead? What material would be suitable for such equipment? I’ve read online that neither titanium alloy nor fiberglass has very good corrosion resistance (this circulating air needs to be washed first, and may contain hydrogen chloride and water).
For Na-type vacuum pumps, since wet chlorine is involved, titanium is chosen as the material – is this feasible?
Titanium is too expensive, and the high-pressure blowers available today do not meet the required pressure and flow specifications. I thought of using two blowers in parallel to meet the flow requirements. High-pressure blowers seem to be made of aluminum alloy and coated with Teflon.
To increase the pressure by 1 kg, it’s not a blower that’s needed; rather, a compressor should be used
Compressors are expensive, and the equipment requires regular maintenance. The current calculated value is 60 KPa, which is why such a high value is mentioned. The requirements are a bit high at the moment. Does anyone know any manufacturers of chlorine blowers? I’d like to contact a few of them.
It seems that the sealing and corrosion resistance of blowers currently do not meet the requirements specific to chlorine, not to mention the need to achieve a pressure of 0.2 MPa.
The manufacturers do provide verbal assurances regarding sealing and corrosion resistance (though the actual performance is unknown), but the pressure level cannot be achieved. . .
I’d like to share the information I found recently in this reply: Pressure selection: The outlet pressure of the centrifugal blower should be ≤60 KPaG； The outlet pressure at stage 1 of the Roots pump is generally ≤120 KPaG ； Rotary vane stage 2 outlet pressure ≤ 240 KPaG ； Material selection: For dry chlorine, ductile iron or a material lined with Teflon can be used ； There’s no need to say more about wet chlorine gas; it’s available online. The Na-type pump needs chlorine to remove moisture before it can be used (this is basically the same for all of them), and it provides good sealing. Additionally: the price of titanium is at least 5 times higher, and with such a low flow rate, not all manufacturers will be willing to produce it.
I took a close look; it might contain hydrogen chloride, and titanium materials are not suitable either. Fiberglass is the best choice – it’s inexpensive – but its sealing performance isn’t very good. It’s really not possible to choose a turbine; Hangzhou Zhenxing and Qiushi will do, as well as other options.