Flash Point Process Analyzer

Flash Point Process Analyzer
PROCESS ANALYZERS
Flash Point Process Analyzer
Norms and standards
•
•
•
•
ASTM D 56
ASTM D 93; DIN EN ISO 2719; IP 34
DIN EN ISO 13736; IP170
DIN 51755
Application
The BARTEC BENKE Flash Point Process Analyzer (FPA-4) is a continuously measuring analyzer, suited
to measure the flash point (FP) of a liquid phase. It correlates with laboratory measurements. The analyzer has
to be calibrated with a sample of known flash point temperature. In case of multi stream use, the calibration
needs to be carried out for each single stream.
The flash point temperature is defined as the lowest temperature at which application of an ignition source
causes the vapors of a specimen of the sample to ignite under specified conditions of test.
•
establishing ignition specification for fuels:
- Automotive diesel fuel for internal combustion engines
- heating oil
•
determination of safety limitations (fire hazards/ explosion risk) for storage and handling
•
detection of contamination by light ends
•
monitoring of stripping processes
Measurement principle
The FP analysis is based on a catalytic oxidation. The FPA-4 is first calibrated by means of a sample with
known FP. The sample is mixed with preheated combustion air, both having constant flow rates, and
continuously fed to the measurement cell. It is then heated up until the sample temperature in the cell reaches
the known FP. At this time, the detector signal level is registered, as it corresponds to the FP of the known
sample.
In routine operation, the sample is heated up until the detector signal level reaches the value registered during
the calibration procedure. Then the sample temperature is measured in the cell, as it represents the FP of the
sample under investigation. Excess sample passes to drain (overflow). The sample vapor is vented to
atmosphere. The detector signal controls the incoming sample temperature.
The complete analysis procedure is controlled, monitored and visualized by the Process Analyzer Control
System (PACS) software. It offers a user interface for local analyzer operation and for the regeneration function
of the detector.
The FP value is transferred via the standard analog 4 - 20 mA output. A digital output signal will be generated
(come read). Additional outputs and a MODBUS interface, which allows direct control of the analyzer from the
DCS, are available as an option. If remote access is demanded, the FPA analyzer can be equipped with a
remote access interface (e.g. Modem, ISDN) for service and maintenance purposes.
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Flash Point Process Analyzer
Continuous Flash Point Process Analyzer
Analyzer type
FPA-4
Method
Correlates with ASTM D 56, ASTM D 93 by continuous measurement
(catalytic combustion)
Measurement ranges
Within 30 °C – 120 °C or within 80 °C – 160 °C / ma x. FP 160 °C
Reproducibility
≤ ASTM
Repeatability
≤ ASTM
Measurement cycle
Continuously operated
Ambient temperature
5 °C - 40°C
Ambient humidity
Max. 70%, non - corrosive
Sample at analyzer inlet
General conditions
Max. viscosity at FP not to exceed 200 cSt
Flow rate
2 l/h - 3 l/h
Pressure
150 kPa - 300 kPa
Inlet temperature
min. 15 °C below expected FP
Outlet / vent
Open to atmosphere
Utilities
Cooling water
Clean cold water, temperature depending on measuring point
20 l/h - 60 l/h / 1 bar - 3 bar
Power supply
See Specification of purged electronic housing
Instrument air (inlet)
See Specification of purged electronic housing
Combustion air
At least Humidity class 2 acc. to ISO8573.1 (dew point ≤ - 40°C)
Electrical signals
Output signals
1 x 4–20 mA, 800 Ω out; (standard), additional outputs on request
System alarm
Digital output / potential-free
Valid signal
Digital output / potential-free
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Flash Point Process Analyzer
Options
Validation request
Digital input
Analyzer reset
Digital input
Input signal
1 x 4–20 mA, 200 Ω in; (electrically isolated)
MODBUS
RS485 or fiber optics
Remote access interface
Modem (V 90 analog) or ISDN
Closed loop chiller
If no suitable cooling water is available at place of installation
Chiller alarm
Digital output / potential-free
Communication
Display
Color LC display 800 x 600 pixel
Mouse / Keyboard
Virtual keyboard, operated via mouse in front door
Software
Operating system MS Windows 2000
PACS Software, optional Remote Control Software
Explosion protection
Protection type
II 2 G EEx pd (IIA; IIB; IIB+H2) T3 or T4
(Protection type depending on application)
Certificate number
TÜV 03 ATEX 2222
Optional available:
Class I, Div. 2, Groups B, C and D
Classification (USA and CAN)
Class I, Zone 1, Groups IIA or IIB or IIB+H2
CSA Certificate of Compliance
Standard connections
Tube fittings
6 / 12 / 18 mm metric SWAGELOK, other types available on request
Cable entries
M20 x 1,5 / M25 x 1,5
Weight
Approx. 300 kg
Dimensions (L x D x H) in mm
Mounting Rack 1140 x 710 x 2100
Important Notice: FPA-4 is subject to continuous product improvement, specifications may be subject to change
without notice.
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Flash Point Process Analyzer
Specification of the air purged electronic housing
System type
PAGS 96-1 (Process Analyzer Housing System)
Version number
96 0200
Protection type
II 2 G EEx p II T4
Certificate number
TÜV 96 ATEX 1132X
EC – identification number
0032
Housing volume
Approx. 200 dm
Dimensions (L x D x H) in mm
515 x 470 x 800
Protection class
IP65 (with a Vortex chiller IP54)
Power supply
230 VAC / 50 Hz and 400 VAC / 3phs (standard), other on request
3
Approx. 2 kW in total
Power consumption
(analyzer approx. 700 W / optional chiller approx. 1300W)
Maximum power loss
515 W
Ignition prevention gas
Instrument air (dry and oil free)
2 bar - 5 bar (for EEx p system)
Instrument air (inlet)
4 bar - 4,5 bar (for valves)
dew point ≤ - 40°C (humidity class 2 or better acc. to ISO8573. 1)
Housing overpressure
3 bar - 4 mbar (operating pressure inside)
Shut down overpressure
0,8 mbar (lower limit of operating pressure inside)
3
Min.1,4 Nm per flushing cycle during start-up (7 x housing volume)
Instrument air consumption
In normal operating mode only for leak-compensation.
Important Notice: FPA-4 is subject to continuous product improvement, specifications may be subject to change
without notice.
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Flash Point Process Analyzer
Figure 1: Main panel of process software
Figure 2: Status of analog and digital In- and Outputs
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Flash Point Process Analyzer
Test Run
12 Hours Test Run on Kerosene
44
43
FP [°C]
42
41
40
39
38
06.08.2005 18:30
06.08.2005 20:10
06.08.2005 21:50
06.08.2005 23:30
07.08.2005 01:10
07.08.2005 02:50
07.08.2005 04:30
07.08.2005 06:10
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Flash Point Process Analyzer
Legende:
A: Flame arrestors
B: Touch Screen
C: Controller module
D: Key switch
E: Digital valve
F: Junction box
G: Sampling system
(option)
H: Closed loop chiller (Option)
Connections for sample
and validation fluid (option)
Figure 3:
Layout drawing of the FPA-4
(Example; incl. optional sample conditioning system and chiller)
BARTEC BENKE GmbH
Borsigstrasse 10
D - 21465 Reinbek / Hamburg
Phone +49 (0)40 727 03 - 0
Fax
+49 (0)40 727 03 - 228
Internet www.bartec-benke.de
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