Energy Balance Flow Sheet of Crude Benzol Hydro Refining Process

Important equipment used in Hydro refining of crude Benzol:

  • Stage evaporator
  • Pre-reactor 
  • Main reactor 
  • Stripping column 

The energy balance of the above equipment:

Stage evaporator:
The input to the stage evaporator: Recycle gas, Crude benzol.
Output:   Crude benzol vapors, Residue.

The inlet temperature of Crude Benzol                                                           = 1600c

The outlet temperature of Crude Benzol vapor                                              = 1800c

Inlet temp recycle gas                                                                               = 1600c

The outlet temperature of RC gas                                                                   = 1800c

Input mass flow rate of Crude Benzol                                                     = 60tons / day

Output mass flow rate of Crude Benzol vapor and rc gas                       = 58tons/day

Input mass flow rate of RC gas                                                                = 2 tons / day

Out mass flow rate of residue                                                                   = 4tons / day

HYDROGEN  IN :

H = Q = mCpdt

             = 2X265.649X (433-298) X1000

             =8628.5 KJ/day     

HYDROGEN GAS OUT  :

H = Q = mCpdt

             = 2X267.1613X(453-298)  

              =9961.5 KJ/day

BENZENE  IN :

H = Q = mCpdt

       = 0.75x60x1000x820.58(433-298)

       =598989.656 KJ/day

BENZENE  OUT :

H = Q = mCpdt

            = 0.75X56X1000X840.206(453-298)

             =657324.9 KJ/day

TOLUENE IN:

H = Q = mCpdt

            =0.15X60X1000X1044.166(433.-298)

             =154763.05 KJ/day

TOLUENE OUT :

 H = Q = mCpdt

             =0.15X56X1000X1068.389X(453-298)

             =20109.198 KJ/day

XS FRACTION IN :

H = Q = mCpdt   

             =  0.05X60X1000X1293.17X(433-298)

              =123646.86 KJ/day

XS FRACTION OUT:

H = Q = mCpdt

           =0.05X56X1000X1320.15(453-298)

           =68907.86 KJ/day

BALANCE ON IMPURITIES :

OXYGEN IN :

H = Q = mCpdt 

            =0.01X1000X60X253.27(433-298)

             =2467.11 KJ/day

 OXYGEN OUT :

H = Q = mCpdt

            =0.01X1000X56X254.419(453-298)

            =2656.189 KJ/day

NITROGEN IN : 

H = Q = MCP dt

            =0.02X60X1000X247X(433-298)

            =4829.24 KJ/day

NITROGEN OUT :

 H = Q= mCpdt

            =0.02X56X1000X248.475(453-298)

             =5188.268KJ/day

SULFUR IN :

 H = Q = mCpdt

             = 0.03X60X1000X289.4(433-298)

              =8458.777KJ/day

SULFUR OUT :

H = Q = mCpdt

            =0.03X56X1000X298.954X(453-298)

            =9463.45KJ/day

ENERGY IN = 901783.7KJ/day

ENERGY OUT = 892436.2kj/day

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