Design of the crushing and drying process scheme for propylene oxide saponification residue
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Our factory produces propylene oxide using the saponification method. We want to crush and dry the saponification residue (45% CaO, 40% H2O) into a material with a particle size of 150–200 mesh and a moisture content of 1–2%. The production volume required is 20,000–30,000 tons per month. What kind of process and equipment should be used for this? What is the cost per ton, and how much is the investment required? There are rewards for replying, valuable additional rewards.
First of all, it’s clear that your production capacity is quite substantial! It’s not something that just anyone can do! Secondly, the desired fineness also depends on the components of your raw material. I was exposed to this type of process many years ago; I think it was supersaturated slurry? Finally, it comes down to what equipment to use: there are many available options! First, we need to see what qualifications you have Do you have cheap low-pressure steam? Are there still cheap fuels with low calorific value? Or is there hot smoke? . . . . . . It’s not too late to select process equipment after the conditions are established! Only at the end does one become aware of investment, costs, expenses, and benefits, etc. I hope this helps! Please point out any shortcomings!
Does the original poster’s project seem to have been successfully resolved?
Propylene oxide is a very important basic chemical raw material; the main industrial production methods previously used were the chlorohydrin method and the co-oxidation method. The chlorohydrin process consumes large amounts of chlorine, causing severe equipment corrosion and environmental pollution. The co-oxidation method uses alkyl hydroperoxides generated by the auto-oxidation of ethylbenzene or isobutane as an oxygen source to catalytically epoxidize propylene, producing propylene oxide and numerous by-products; the production process is complex and requires substantial investment for plant construction.
I heard that metallurgical slag is generally only used for filling lakes. May I ask what purpose is served by the saponification slag after such treatment, as mentioned by the original poster?
I’ve never seen this before; I’ve only seen calcium hydroxide from acetylene plants, which is sold for road construction.
I used to be the workshop supervisor for propylene oxide (using the chlorohydrin process; I worked in that workshop from 1987 to 1997). Propylene oxide was also produced there, which is why my workshop was called the Dialkane Workshop.