Sodium Sulphate Crystalliser Plant, Plate Heat Exchanger

Feed Pre-heater, Titanium Plate Heat Exchanger by Hessa-South Africa

Sodium Sulphate Crystalliser Plant, ASS Feed Pre-heater, duty carried by two units of Titanium Plate Heat Exchanger.
Project accompalished by HESSA, South Africa Team

DETAIL

Sodium Sulphate Crystalliser Plant, ASS Feed Pre-heater, duty carried by two units of Titanium Plate Heat Exchanger; Process Condensate Cooler, duty is carried by one unit of SS316 Plate Heat Exchanger. Project accomplished by HESSA, South Africa Team

In Sodium Sulphate Crystalliser Plant, Plate Heat Exchanger act as ASS Feed Pre-heater for High Temperature condensate cooling, meanwhile Feed Liquor is pre-heated by condensate.

Feed Liquor Composition
Na2SO4 wt%	25.8
NaCl wt%	0.4
K2SO4 wt%	0.4
PH	8-9
Max Total Chlorides	5000 ppm

In view of High Corrosive feature of Feed Liquor, we use positive 0.5mm Titanium material sheet as Plates. The Titanium raw material comes from Nippon of Japan, the Titanium Composition is 99.5%. Furthermore, SHINEHEAT procurement is all Positive Allowance in Titanium plate thickness, generally not less than 0.48mm after pressing. It is contribute longer service life for SHINEHEAT Plate Heat Exchanger.

In order to make qualified products, the Feed Liquor need to reach specific temperature range. This job is implemented by High efficient Plate type heat exchanger.

Now SHINEHEAT provide a model of AT150B Plate heat exchanger for this duty
Following is design data sheet of plate heat exchanger.

Item:                        Process Plant 614-313
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SHINEHEAT Plate Heat Exchanger                          Technical Specification
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2*AT100-B Titanium 0.50 mm 157/159pl 58.9/60.1 m²

pdes=5.0 barg   Tdes=55.0/50.0-115.0/110.0 °C k=4836/4019 W/(m²*K) Marg.=20(20)% Foul.=0.0(0.42)*10-4 m²*K/W
Load=869.5 kW LMTD=3.7 K

Condensate            13.8 m³/h 68.6<80.0 kPa   112.0 °C --> 55.0 °C        3*16H
Feed Liquor Mp      12.5 m³/h 76.2<80.0 kPa   109.4 °C <-- 50.0 °C        3*16H

Dp(p+co)=0.0928 kPa v(co)=0.217 m/s NTU=15.53 Conn 1/1 150.0 mm
Dp(p+co)=0.105 kPa v(co)=0.198 m/s NTU=16.18 Conn 1/1 150.0 mm

Media                      Temp.     Dens.                 Sp.heat.       Cond.              Visc.
Water                       55.0         984.5                  4.17              0.648               0.503
                                88.1         966.6                  4.19              0.675               0.321
                                112.0       950.2                  4.23              0.686               0.250
Feed Liquor Mp        50.0         1238.0                3.40              0.440               1.00
                                84.5         1234.5                3.40              0.440               0.497
                                109.4       1232.1                3.40              0.440               0.300

Temperatures
                                                                                                Side 1              Side 2
Bulk                         112.0       54.5                    m(ch)            819                  969
Wall                         111.2       52.8                    v(neck)          0.489               0.446
Wall                         111.0       52.4                    v(ch)             0.213               0.194
Bulk                         110.0       50.0                    tau(wall)        20.7                 23.0
Bulk or wall temp. out of range side 2

Warning: Theta (15.5) >= 10. Results may be unreliable. Contact thermal specialist at application center

By many years’ supplying experience in industry, we design optimal model of plate heat exchanger by both thermal efficiency, pressure drop and size economical, also take future capacity expansion into consideration, so you will find our enough length in Carrying and Guarding Bar of plate heat exchanger.

The Design Drawing for Plate Heat Exchanger

The Plate Heat Exchanger Supply Scope
In order to take good use of international collaboration among HESSA Members. Shineheat-HESSA China is providing Pre-assembly Plate Heat Exchanger Unit, the final assemble is finished by IWC-HESSA South Africa. Under this way, the Transportation Cost and Import Tax are reduced.

For Process Condensate Cooler, duty is carried by one unit of SS316 Plate Heat Exchanger.
SHINEHEAT provide a model of AT60B Plate heat exchanger for this duty
Following is design data sheet of plate heat exchanger.

Item:                        Process Plant 614-315

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SHINEHEAT Plate Heat Exchanger                          Technical Specification
_____________________________________________________________________________________________
1*AT60B AISI 316 0.50 mm 57/59pl 8.6/8.9 m²

pdes=5.0 barg   Tdes=30.0/25.0-65.0/40.0 °C k=5426/4522 W/(m²*K) Marg.=20(20)% Foul.=0.0(0.37)*10-4 m²*K/W
Load=455.8 kW LMTD=11.8 K

Water                      13.4 m³/h 12.7<80.0 kPa   63.0 °C --> 33.0 °C          1* (14H+15ML)
Water                      32.9 m³/h 75.1<80.0 kPa   40.0 °C <-- 28.0 °C          1* (14H+15MH)

Dp(p+co)=1.38 kPa v(co)=1.89 m/s NTU=2.54 Conn 1/1 50.0 mm
Dp(p+co)=8.65 kPa v(co)=4.67 m/s NTU=1.02 Conn 1/1 50.0 mm

Media                      Temp.     Dens.                 Sp.heat.       Cond.              Visc.
Water                       33.0         993.4                  4.18              0.621               0.752
                                42.5         989.8                  4.18              0.633               0.624
                                63.0         980.7                  4.17              0.655               0.445
Water                       28.0         995.0                  4.18              0.614               0.836
                                31.8         993.8                  4.18              0.620               0.770
                                40.0         990.8                  4.18              0.630               0.654

Temperatures
                                                                                                Side 1              Side 2
Bulk                         63.0         30.2                    m(ch)            358                  867
Wall                         51.6         29.0                    v(neck)          0.604               1.45
Wall                         48.5         28.7                    v(ch)             0.235               0.563
Bulk                         41.6         28.0                    tau(wall)        16.4                 95.3

Bulk                         63.0         32.5                    m(ch)            539                  1370
Wall                         50.7         30.0                    v(neck)          0.909               2.29
Wall                         47.2         29.4                    v(ch)             0.353               0.890
Bulk                         40.0         28.0                    tau(wall)        16.3                 96.2

The Design Drawing for Plate Heat Exchanger

At Site, New plate heat exchanger installed and operated very successfully, up to now it is running on good condition and performance.