Seeking help with vacuum issues
Thread Content
The vacuum level required for the refining and deodorization of edible oils is below 2 mbar. Currently, a 4-stage steam jet pump is used to maintain this vacuum level. However, since steam is expensive – 300 yuan per ton when produced by fuel boilers – there is a desire to modify the vacuum system in order to maintain the same vacuum level while achieving the most economical solution possible, thereby reducing energy consumption. One idea currently being considered is to use a water ring vacuum pump in combination with a steam jet pump
Generally, a secondary Roots vacuum pump combined with a primary water ring vacuum pump can meet the requirements.
What was said upstairs makes sense, but it needs to be determined based on the system’s exhaust capacity. Your system is not suitable if it has too high an air extraction rate.
Generally, a two-stage Roots vacuum pump combined with a pre-stage water ring vacuum pump can meet the requirements. I was wondering if it’s possible to do without steam.
Here, the cost of steam is 140 per ton; there are really big differences in prices in different regions! ! ! ! Keep an eye on this: apart from steam jet pumps, what other devices have a high vacuum-pumping capacity and a large exhaust volume? ? ?
The process flow is determined based on the process pumping volume and compression ratio. It can generally be achieved using mechanical and jet methods. Rotary vacuum devices achieve a lower level of vacuum, while reciprocating vacuum devices achieve a higher level of vacuum. Jet (fluid) methods require a low volume of gas to be evacuated. Note that installing a condenser between each stage can condense a portion of the condensable materials, thereby reducing the pumping volume required in the next stage.
This type of pump does not require steam; it only needs an appropriate temperature and vacuum level for the cooling water. The advantage of this combination is that it maintains a sufficient pumping capacity even under high-vacuum conditions. Conventional water-driven pumps, as well as the steam-water driven pumps mentioned by the poster, can achieve high vacuum levels only at the cost of reduced pumping capacity. In fact, this type of combined pump was introduced just a few years ago and is therefore a relatively new product. However, it is now widely used and has proven to be very effective. If the poster has not used it yet, it is recommended that they give it a try. If it works well, its use could be promoted further; if there are any issues, please send me a message on the site and I will help you resolve them.