Selection of vacuum pumps! !
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Currently, all factories are striving to reduce energy consumption and emissions, and steam-jet vacuum pumps are gradually being phased out. So, which model of vacuum pump should be chosen that is both energy-efficient and power-saving, while still meeting the required process specifications? Negative one atmosphere pressure, with an exhaust volume of 300 m3/h.
Does a negative atmospheric pressure mean an absolute vacuum? That’s a rather high requirement. Try a water ring vacuum pump, but water ring pumps can only achieve a rough vacuum level and cannot reach the vacuum degree you need; you might consider installing a small steam ejector in conjunction with the vacuum pump.
Can’t use steam – is that energy-saving? It’s an absolute vacuum; given the properties of the material, a negative atmospheric pressure is required. For concentration, a high volume of air needs to be removed.
It is not true that steam jet pumps are being phased out. The vacuum level parameter is too inaccurate; it is recommended that you verify it again ； You also need to know your gas composition, temperature, and pressure. It will have to be determined after calculating whether it saves energy or not. This post was last edited by Xilin Difeng on 2009-3-23 21:08.]
Negative atmospheric pressure? You’re sure? That seems a bit high. We usually use water ring vacuum pumps, which work quite well
The vacuum level must be greater than -0.096 MPa, and this level must be maintained absolutely; it is essential to maintain such a vacuum level when producing sodium persulfate concentrate. The vacuum level and pumping capacity of steam vacuum pumps are satisfactory, but they consume too much steam; as a result, they are gradually being phased out in this industry. In other industries, it can be used after comprehensive consideration. Let’s discuss whether there are other types of vacuum pumps that can provide high vacuum levels while also being energy-efficient Water ring vacuum pumps consume a lot of electricity, and the vacuum level achieved is not sufficient!
Has the original poster considered a hydraulic jet pump? I’m not sure if a vacuum level can be achieved. But I have seen water ring vacuum pumps achieve a vacuum level of 5 kPa; I’m not sure whether this is suitable for the original poster or not. Theoretically, steam jet pumps should also be relatively energy-efficient, but it is the rapid increase in steam prices that leads to the so-called energy consumption issues... Last edited by Sister on 2009-3-27 19:49]
Rotary vane water ring vacuum pumps offer high vacuum levels; the water ring pumps are of the F2SK series and are made of fiberglass for corrosion resistance.
Criteria for selecting a vacuum pump: 1. Properties of the material (whether it is corrosive, toxic, flammable, or explosive, etc.)； 2. Vacuum level determined by the design ； 3. Medium temperature ； 4. Medium flow rate (standard volume) ； 5. Operational stability (this is actually also one of the considerations). The poster’s statement is not very professional; in engineering, there is no such thing as \"negative one atmosphere\" ； Secondly, the volume parameter provided is also imprecise; 300 cubic meters per hour – it is not clear whether this refers to the standard volumetric flow rate or the flow rate under specific operating conditions. There is a significant difference between the two, and this difference directly affects the power requirement of the vacuum pump. The vacuum pumps commonly used in industry today include steam jet pumps (which can be connected in multiple stages), water ring vacuum pumps, and mechanical vacuum pumps. From an environmental perspective, mechanical vacuum pumps are more environmentally friendly as they produce no emissions; however, their airtightness is inferior to that of the other two types. Steam jet pumps have a low energy efficiency, are energy-intensive, cause significant pollution, and generate a lot of noise, but they are suitable for systems with an excess of steam ； Water ring vacuum pumps have good airtightness and relatively good operational stability, but they generate wastewater ； Depending on the corrosion requirements, pumps made of other suitable materials such as stainless steel or ceramic pumps can be selected ； Pumps with different power levels can be selected based on the gas flow rate ； Temperature affects the airtightness and stability of the pump.