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Continuous Distillation Column

distillation

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#1 mat333r

mat333r

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Posted 07 August 2016 - 02:22 AM

Hi All,

 

                              I am having an issue with Continuous distillation column. In my solvent recovery plant I have 3 Columns and 2 reactor vessels for flash distillation. for Heating I am using thermic fluid heater with capacity of 1500000 kCal/hr. At a time I run 4 of these units for distillation and they require heat of approximately 1400000 kCal/hr. My question is when the set temperature of thermic fluid is achieved will my thermic fluid heater cut off or keep running. in thermic fluid heater I use furnace oil is used as fuel and Therminol -55 is the thermic fluid. Hourly Furnace oil consumption is 140 ltr and Furnace oil have calorific value of 10200 to 10400 kCal/kg. 

 

My second question is whether the heater will give 100% output i.e. 1500000 kCal/hr or it will be less than that?



#2 rilmehta

rilmehta

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Posted 30 August 2016 - 04:55 AM

Hello Mat

 

For thermic heaters there is always a set point range. Suppose your HOS - 200 C & HOR - 190 C, so in that case if HOR goes to 200 C (under no load condition) the hot oil unit will be going into shutdown mode i.e, the shutdown cycle will start. When the temperature again goes to 190 C it will go in restart mode. 

 

When you define 1.5 Mkcal, it can give up to 100 % capacity no concerns here. All the efficiency allowances are taken care by the vendor in design itself.

Hope this explains.






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