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Equipment Design

Equipment Design. Done by Ahmad Boland Supervised by: Prof. Mohamed Fahim Eng. Yusuf Ismail. Content:. 2 Heat Exchanger ( 1 & 2 ) Cooler (E-100) Compressor (K-102) Trans-alkylation reaction. Shell and tube heat exchanger.

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Equipment Design

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  1. Equipment Design Done by Ahmad Boland Supervised by: Prof. Mohamed Fahim Eng. Yusuf Ismail

  2. Content: • 2 Heat Exchanger ( 1 & 2 ) • Cooler (E-100) • Compressor (K-102) • Trans-alkylation reaction

  3. Shell and tube heat exchanger • Objective : to cooled the stream out from reactor by exchange heat with benzene comes from benzene column.

  4. Assumptions: • Use shell and tube heat exchanger, one shell and two tube passes. • The value of the overall heat transfer coefficient was assumed to be 535 w/m2.s. • Assume the outer, the inner diameter and the length of the tube.

  5. Main design procedure: 1-Heat load ,(kW) Q = (m Cp ΔT)hot =(m Cp ΔT)cold 2- Tube side flow , (kg/hr)

  6. 3-Log mean Temperature, (˚C) • 4-Provisional Area, (m2)

  7. Number of tube: Bundle and Shell Diameter

  8. Tube side Heat Transfer Coefficient • Shell side heat Transfer Coefficient

  9. Overall Coefficient • Tube Side pressure drop • Shell side Pressure Drop

  10. Thickness

  11. Operating Condition

  12. Assumptions:For second heat exchanger: • Use shell and tube heat exchanger, one shell and two tube passes. • The value of the overall heat transfer coefficient was assumed to be 800 w/m2.s. • Assume the outer, the inner diameter and the length of the tube.

  13. Results

  14. Operating Condition

  15. Assumptions:For cooler: • Use shell and tube heat exchanger, one shell and two tube passes. • The value of the overall heat transfer coefficient was assumed to be 221 w/m2.s. • Assume the outer, the inner diameter and the length of the tube.

  16. Results

  17. Operating Condition

  18. Compressor (K-102) • Objective: • Compressor is a device in which a gas is compressed to increase its pressure. Compressor (K-102) is employed to increase the pressure from Pin=(179.3psia) to (Pout=530.4psia)

  19. P2 T2 Design procedure: 1.Calculate n from P1/P2 = ( T1/T2)^(n/n-1) 2. Calculate work done Btu/lb-mole W = (n*R*(T1-T2))/(1-n) R=Cp/Cv 3. Calculate horse power, ftlbf/lbm Hp=( (Z1*R*T1)/Mw)*(n/n-1)*(Rc^(n-1/n) – 1) P1 T1

  20. whereRc = P2/P1 4. Calculate the efficiency from (n/n-1) = (K/K-1)*Ep , Where K = (Mw*Cp)/(Mw*Cp – 1.986) Ep=efficiency of the compressor Cp=heat capacity, Btu/lboF

  21. Results: Cost ($)= 251600 Type of compressor: reciprocating

  22. Trans-alkylation reaction • Objective: The aim from trans-alkylation reaction is to convert PEB to EB. PEB EB

  23. Main design procedure: • Design Equation: 2) Rate Law: -rA = K CA Arrhenius equation

  24. 3) Stoichiometry 4) Energy Balance 5) Dimensions of the Reactor Assuming L/D = 4

  25. 6) Height of reactor= L+D+(2*space) 7) Weight of cat. = vol. of reactor (1- ϵ)* ρcat 8) Area of reactor= 2*(3.14)*r*H 9) t = (P r i / (S E-0.6P) ) + Cc Where: t: shell thickness(in) P: internal pressure r i (Rs): internal radius of shell (in) E: efficiency of joint S: working stress stain Steel Cc: allowance for corrosion

  26. Results: K = 37.6675 s-1 From Polymath the volume of reactor V = 13.3 m3 Dimensions of the Reactor D = 1.61764 m L = 6.470559 m

  27. Material of Construction: 316 carbon steel Cost : 154800 $ H(reactor)=21.23 ft W= 232.0318 kgcat A = 353.309 ft^2 t=1.38e-1 m

  28. Thank you

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