Which vacuum pump for pressure reduction?
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In refinery units, steam jet pumps are generally used to create a vacuum. What are the advantages of using steam jet pumps in this context? Is it cost savings, reduced energy consumption, higher efficiency, or better environmental benefits? There are many ways to create a vacuum. Why not use other methods then? What other efficient industrial vacuum pumping methods are known? Could we discuss it?
The vacuum extraction system for reducing the roof pressure currently typically uses a steam-based vacuum system, which requires less maintenance and offers high reliability； However, for large-scale installations, mechanical vacuum pumping systems demonstrate their economic advantages, resulting in significant energy savings and reduced consumption. The top of the vacuum distillation tower employs a hybrid vacuum extraction system that combines high-efficiency steam jet vacuum extraction with mechanical vacuum extraction; compared to a system that uses solely steam jet vacuum extraction, this approach is expected to save 0.3–0.5 kilograms of standard oil per ton of crude oil, with a payback period of only 0.5–0.8 years.
I think large units use steam vacuum, while small units use mechanical vacuum. The steam vacuum efficiency is high.
I manufacture American Kroll steam injectors; domestically, three stages are typically used, but we only need two stages, and the cost is actually lower than that of domestic ones. I’m willing to exchange ideas on this
Now, a first-stage or second-stage liquid ring vacuum pump is sufficient; there are comparisons on energy savings and consumption reduction available in the forum.
This post was last edited by crazymoonman on 2013-4-2 at 11:24. Steam vacuum pumps are characterized by a relatively simple structure and high reliability in operation, whereas mechanical vacuum pumps have a much more complex structure and tend to experience more operational failures. Now, in addition to steam vacuum pumps and mechanical vacuum pumps for creating a vacuum, there are also vacuum pumps that use liquids as the working medium. Also, to correct what was said on the 3rd floor: steam vacuum pumps have low efficiency, while mechanical vacuum pumps have higher efficiency.