jamesbury
APPLICATION REPORT
Chlorine
Vaporizer
Pressure
Indicator
PI
Rupture
Disc
Barometric
Leg
Pressure
Indicator
PI
6
Tubes
Superheat
Section
Expansion
Chamber
3
7
1
8
2
7
Level
Transmitter
Liquid
Chlorine
from
Source
LT
Low
Temperature
Alarm
Reserve
Container
PC
A
Condensate
Outlet
5
5
Drain
PI
4
8
Pressure
Indicator
Flow
Control
Steam or
Hot H20
Chlorine Vaporizer
Manual/Isolation Valve
Rotary Control Valves
4
1/4" (8DN) 9FA 2236 XT
1
5
1" (25DN) 9FA 2236 XT
6
1/4" (8DN) 9FAC 2271 XT
(40 – 50DN) 7150C 2271 XTZ1
8
Chlorine
Gas to
Process
1" - 2" (25 – 50DN) 7150 31 2236 XTZ1
1" - 2" (25 – 50DN) 7150 31 2236 XTZ1
w/ QPX Actuator w/ Positioner *
(40 – 50DN) 7150C 31 2271 XTZ1
w/ QPX Actuator w/ Positioner *
Emergency Shutdown Valve
3
2" - 3" (50 – 80DN) 7150C 31 2271 XTZ1
w/ VPVL Actuator Spring Return FC
* Positioner can be:
NE Style Electro Pneumatic
NP Style Pneumatic
ND Style Digital
Chlorine Processing
Vaporizing
Chlorine is often supplied to a process as a vapor but is
delivered to a processing site in liquid form, usually in a
bulk container.
It is possible to withdraw Cl2 from the vapor space in a
bulk container. However, it’s impossible to sustain high
feed rates. As the vapor is released, the pressure drops
and the Cl2 cools and produces less vapor. The process
of turning Cl2 liquid to vapor involves the application of
heat under controlled conditions. The vaporizer is where
this occurs.
Chlo7 • 8/2011
APPLICATION REPORT
Valve Requirements
(1 ) Hot water at 140°F (60°C) or 75 psi (5 bar) steam is
modulated to maintain vapor producing temperature in the
liquid Cl2 chamber of the vaporizer. (2 ) Cl2 feeds the
process at about 90°F (32°C) and 80 psi (6 bar) through a
rotary control ball valve. Process pressure regulates valve
position. A fail closed emergency shut down valve (3 )
isolates the vaporizer from process and can be instrumented
to fail on signal from a variety of sources. Shut-off logic is
process dependent.
There are numerous drain and isolation valves. Flanged
manual valves (8 ) isolate the vaporizer, hot H2O or steam
control valves. Manual Cl2 valves (7 ) isolate the Cl2
control valve. A thread end valve (4 ) isolates the Hot H2O
or steam pressure gauge. The Cl2 gas pressure gauge is
isolated by a threaded Cl2 valve (6 ). The condensate outlet
and vaporizer drain lines shut off with 1" (25DN) thread-end
valve (5 ).
The information provided in this bulletin is advisory in nature, and is intended as a guideline only.
For specific circumstances and more detailed information, please consult with Metso.
Metso Automation Inc.
Europe, Vanha Porvoontie 229, P.O. Box 304, FI-11301 Vantaa, Finland.
Tel. +358 20 483 150. Fax +358 20 483 151
North America, 44 Bowditch Drive, P.O. Box 8044, Shrewsbury, MA 01545, USA.
Tel. +1 508 852 0200. Fax +1 508 852 8172
South America, Av. Independéncia, 2500- Iporanga, 18087-101, Sorocaba-São Paulo
Brazil. Tel. +55 15 2102 9700. Fax +55 15 2102 9748/49
Asia Pacific, 20 Kallang Avenue, Lobby B, #06-00, PICO Creative Centre, Singapore 339411, Singapore.
Tel. +65 6511 1011. Fax +65 6250 0830
China, 19/F, the Exchange Beijing, No. 118, Jianguo Lu Yi, Chaoyang Dist, 100022 Beijing, China.
Tel. +86-10-6566-6600. Fax +86-10-6566-2575
Middle East, Roundabout 8, Unit AB-07, P.O. Box 17175, Jebel Ali Freezone, Dubai,
United Arab Emirates. Tel. +971 4 883 6974. Fax +971 4 883 6836
www.metso.com/automation