Vertical type heat exchanger query 1

[koba78]

Dear Sir/Madam

I have a polyester acrylate plant design project, and found the vertical type condenser installed on the top of the reactor(required to recycle the solvent ).
But, I don’t quite understand the reason why the vertical instead horizontal condenser to be installed. In spite of saving the limitation of space, is any idea for this kind of vertical type condenser to be chosen here ?

And, it seems that the solvent won’t boil out from the reactor cause the feed ,acrylic acid bp=141C is greater than water bp.= 100C, biphenol epoxy, bp=unspecified here.
So, could any pro here can kindly tell me why this condenser to be installed here to recycle the acrylic acid back ?


Thank you very much for your time and help.

Regards,

 

[Compositepro]

Condensation is on the tube side because the tube side can be cleaned. Condensate will drain best and not interfere with the vapor flow if the tubes are vertical.

 

[EdStainless]

The problem with these is that the shell side if difficult to keep filled with water. You often end up with air pockets under the top tubesheet. This leads to deposits and corrosion at this location.
There should be vents, make sure that they haven't been plugged.

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Plymouth Tube

 

[knapee]

Please check this is fall film condenser or not.

The tube side inlet have mix vapor of Cyclohexane, toluene, and water. Cyclohexan, toluene, water, and nitrogen gas interacting each other and
behave like no-ideal case to make thermodynamics calculation difficult.

HTRI may be used for in this calculation to check heat transfer area.

knape

 

[TD2K]

I would imagine it's been designed as a vertical exchanger so that the condensed solvents drain back into the reactor. That saves you having to pump the solvent back into the reactor from the OVHD separator.

 

[knapee]

In the design of acrylic acid total condenser (horizontal) for the epoxy acrylate reactor, Acrylic acid (10%) and air (80%) in the tube side was cooled from 80 C
@0.5 kg/cm2g to 50 C@ 0.2 kg/cm2g by using cooling water (shell side
inlet = 30C@ 3kg/cm2g, and outlet = 40C @ 2.3kg/cm2g).

Cooling water which is usually more prone to fouling flow in the shell side, and
Acrylic acid vapor and gas (almost N2) flow in the tube side.

My question is following:

1.Are the vertical or horizontal cut and the vent nozzle properly situated in HTRI critical for the result of HTRI or not? (There is already a vent line to waste gas flare in this total condenser, and indeed properly situated vent can prevent accumulation of non-condensable )
Also, the baffles are cut vertically for side to side flow (parallel-cut baffle); it will facilitate drainage of the condensate. However, the parallel-cut baffles have the potential for significant flow and temperature misdistribution in the end zones, which can induce local tube vibration and reduce the effective heat transfer rate in the inlet and outlet baffle spaces.

2.Is TEMA type(BEM), and single segmental baffle proper for this case or not ? Single segmental baffle is operated well in single phase (if 2 phase case, which one is proper ?), and cross flow heat transfer (across the tube) is greater than
the longitudinal heat transfer ( through the windows). However, it may not be
effective with very viscous fluids. ( Is that means not proper condenser in the polymer plant ?)

Above is my silly question, and hope not bother you too much time.

Please kindly give me any comment or guide in this case.

Thank you so much.

Best regards,