On the feasibility of introducing steam from below the jacket
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In a pharmaceutical company where I work, there is a reactor process that requires a temperature of around 80 degrees. Hot water is not sufficient for this purpose; on the other hand, using steam directly will cause high temperatures on the inner walls of the reactor. Therefore, it is necessary to first fill the jacket with circulating water, and then use steam to carry out heating. The excess steam and hot water will flow back upward to the cooling water main or the hot water return pipe. Because the utility main pipes are all under the floor slab, while the distributors extend up to the floor slab, at a higher level than the top of the jacket. If the height of the horizontal tubes in the return pipe section at the upper part of the distributor is reduced by 10–20 centimeters, it should be possible to prevent the jacket water from flowing back into the steam pipes, right? Will this work?
It’s not very feasible; water hammer problems will be severe in the future； It can be used at a lower steam pressure and temperature; or, in the case of a jacket with staged temperature increases, it is possible to disable the upper part of the jacket. Thank you
Try to find a suitable saline as a heating medium; control the concentration so that it has a boiling point of around 110°C at normal pressure. Use steam to heat the saline, with the saline flowing through the jacket. .
It is recommended to add a closed-loop heating system for saline. The saline is heated to around 100°C by steam in the jacket of the saline container, and after being pressurized by a pump, it enters the jacket of the reactor for heating. If a higher temperature in the reactor is required, it is advisable to use cold saline in the reactor jacket to control the temperature; under no circumstances should circulating water be used, as this could lead to dilution of the saline concentration due to mixing of different fluids. Alternatively, circulating water can also be passed through internal coils inside the kettle. Your proposed plan is not feasible
The 5th floor says it’s reliable, safe, and stable. Your plan is too sloppy and not rigorous.
There’s no need to use saltwater; that requires specific materials for the pipe jackets. A pressurized hot water system will suffice, with temperatures of 120–130 degrees being achievable. The pressure is not high either; your original jacket was likely part of a pressure vessel, so it will have little impact on the existing equipment
Conventional reaction vessels cannot withstand the corrosion of hot saltwater; if such operations are carried out, it’s inevitable to replace the vessel every year!
What material are you using for the pipes in your saline system?
What material are you using for the pipes in your saline system?
They are all seamless pipes. The reaction vessel is also a conventional glass-lined reaction vessel!