Research Article

The Pressure Relief System Design for Industrial Reactors

Table 1

Calculated system dimensions and characteristics for vent area, horizontal and vertical heat exchanger, blow down and scrubber tank, absorption column, and outflow chimney.
(a)

ParameterUnitValue

Cooling water data
°C13Designed
°C26Designed
°C24Designed
m3·h−1700Designed
Power supply
A130Designed
V380Designed
kW50Designed
Material flow from reactor
W Calculated from (8)
W Calculated from (8)

(b)

Energy released dataSet conditionPeak condition

Pa Obtained from literature Fauske (1988) [1], Leung (1986) [2]
K394.6396.7Obtained from literature Fauske (1988) [1], Leung (1986) [2]
, K·min−11520Obtained from literature Fauske (1988) [1], Leung (1986) [2]
J·kg−1·K−12930.8Obtained from literature Fauske (1988) [1], Leung (1986) [2]
°C124.3Obtained from literature Fauske (1988) [1], Leung (1986) [2]
°C121.2Obtained from literature Fauske (1988) [1], Leung (1986) [2]

(c)

ParameterUnitValue

J·g−1·K−14.183Obtained from literature Perry and Green (2007) [7]
J·g−1·K−12.9281Obtained from literature Perry and Green (2007) [7]
Blow down tank
m330Designed
m360Calculated from (6)
Pa Calculated from (1)
kg·s−1346Calculated from (2)
Pa Obtained from literature Fauske (1988) [1], Leung (1986) [2]
Pa  PaCalculated from (7)
/0.24Calculated from (34)
kg·s−182Calculated from (35)
m Designed
MAWPPa Designed
Safety relief valve
DNm 0.65Designed
Pa Designed
Vent area
J·kg−1846Calculated from (6)
kg·m−2·s−12124Calculated from (2)
m20.326Calculated from (3)
m0.65Calculated from (5)
Calculated data horizontal heat exchanger
mm5000Designed
= W·m−2·K−1 Obtained from literature Perry and Green (2007) [7]
W·m−1·K−116.2Obtained from literature Perry and Green (2007) [7]
W585711Calculated from (8)
W366125Calculated from (8)
°C80Calculated from (8)
LMTD °C76.16Calculated from (9)
/6.83Obtained from literature Richardson et al. (2009) [10]
/0.0594Obtained from literature Richardson et al. (2009) [10]
/0.96Obtained from literature Richardson et al. (2009) [10]
°C73.11Calculated from (10)
m254Calculated from (11)
/85Calculated from (13)
Pipe dimensions for horizontal heat exchanger
mm50.8BWG 16 Perry and Green (2007) [7], INOX, AISI316
mm46.732
Wall thicknessmm2.034
mm63.5Calculated from (14)
mm689.1Calculated from (15)
BDCmm93Obtained from diagrams Richardson et al. (2009) [10]
mm782Calculated from (16)
mm313Calculated from (17)
m20.04895Calculated from (18)
kg·s−1·m−21986Calculated from (19)
mm36.07Calculated from (20)
/65127Calculated from (21)
/7.48Calculated from (22)
/323Calculated from (23)
W·m−2·K−15490Calculated from (23) and (25)
mm875Calculated from (26)
Pa53800Calculated from (25)
/85Calculated from (27)
kg·m−2·s−17971Calculated from (28)
m·s−12596Calculated from (29)
Retube/ 30390Calculated from (21)
Prtube/ 0.575Calculated from (22)
W·m−2·K−10.044Calculated from (30)
W·m−2·K−10.022Calculated from (32)
W·m−2·K−11957Calculated from (31)
Pa91500Calculated from (33)
Calculated data vertical heat exchanger
Recycleh−122.22Calculated from (40)
Total heat verticalkW23553Calculated from (36)
Heat per recyclekW145.4Calculated from (38)
°C80Calculated from (8)
m25Calculated from (11)
°C40Calculated from (8)
°C15Calculated from (8)
°C24Calculated from (8)
Pipe dimensions for vertical heat exchanger
mm2500Designed
mm50.8 BWG 16 Perry and Green (2007) [7]
mm46.732
Wall thicknessmm2.034
mm63.5Calculated from (14)
mm286.7Calculated from (15)
BDCmm88Obtained from diagrams Richardson et al. (2009) [10]
mm388Calculated from (16)
mm155.2Calculated from (17)
m20.012043Calculated from (18)
kg·s−1·m−28072Calculated from (19)
mm36.07Calculated from (20)
Reshell/264718Calculated from (21)
Prshell/7.48Calculated from (22)
Nushell/2547Calculated from (23)
W·m−2·K−143435Calculated from (23) and (24)
mm437.5Calculated from (26)
Pa82000Calculated from (25)
/13Calculated from (27)
kg·m−2·s−16196Calculated from (28)
m·s−12018Calculated from (29)
/23545Calculated from (21)
/0.575Calculated from (22)
Pa128000Calculated from (33)
W·m−2·K−10.036Calculated from (30)
W·m−2·K−10.01867Calculated from (32)
W·m−2·K−15617Calculated from (31)
LMTD °C38.44Calculated from (9)
/4.44Obtained from literature Richardson et al. (2009) [10]
/0.1385Obtained from literature Richardson et al. (2009) [10]
/0.96Obtained from literature Richardson et al. (2009) [10]
°C36.7Calculated from (10)
m25Calculated from (11)
/13Calculated from (13)
Absorber and scrubber
Scrubber
kg·s−142.21Calculated from reaction stoichiometry
Recycleh−122.22Calculated from (40)
m34.5Calculated from (40)
m Designed
MAWPPa Designed
Absorber
/0.023Calculated ratio
/1.8Obtained from correlations proposed in literature Seader et al. (2010) [11]
kg·m−2·s−149Calculated from obtained factor
m21.68Calculated from (41)
m1.46Calculated from (42)
m0.3048Obtained from literature Seader et al. (2010) [11]
No foaming factor /1Obtained from literature Seader et al. (2010) [11]
/12Obtained from literature Seader et al. (2010) [11]
IMTP packingmm88.9Obtained from literature Seader et al. (2010) [11]
/1.66Obtained from literature Seader et al. (2010) [11]
HETPm1.83Obtained from literature Seader et al. (2010) [11]
m3Obtained from literature Seader et al. (2010) [11]
12Obtained from literature Seader et al. (2010) [11]
m3/h m2 59.9Obtained from literature Seader et al. (2010) [11]
m Designed
MAWPPa Designed
Neutralization reaction in absorber and in scrubber
kJ·mol−122.32Calculated from literature data Perry and Green (2007) [7]
kW7.1Calculated from (37)
Centrifugal pump
m3·h−1100Calculated from reaction stochiometry
Pa400000Designed
Ventilator fan design
Pa500Calculated from (43)
m3 h−172000Calculated from (44) and (45)
m s−1230Calculated from (47)
RPM2920Calculated from (44) and (45)
kW34Calculated from (46)
mm1460Calculated from (44) and (45)
Chimney design
mm6000Obtained from literature diagrams Bleier (1987) [12]
mm500Obtained from literature diagrams Bleier (1987) [12]
Pipe sizing
Pipes from blow down tank via horizontal heat exchanger to absorber
DNpipes
 Blow down tank-horizontal heat exchangermm400Calculated from (48)
 Horizontal heat exchanger-absorbermm400Calculated from (48)
Pipes from scrubber via pump and vertical heat exchanger to absorber
DNpipes
 Pipes from scrubber via pumpmm125Calculated from literature data Fauske (1986), Richardson et al. (2009) [3]
Cooling water pipes
DNpipes
 Main cooling water pipesmm300Calculated from literature data Fauske (1986), Richardson et al. (2009) [3]
 Cooling water pipes after crossingmm200Calculated from literature data Fauske (1986), Richardson et al. (2009) [3]