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 THE NEED
Today's environmentally conscious oil and gas producers work to eliminate acid rain caused by the combustion of sulfur-containing hydrocarbon fuels. This globally important achievement is reached through the removal of the sulfur-bearing compounds and the subsequent recovery of elemental sulfur through the modified Claus process. The Claus plant, commonly known as the sulfur recovery unit (SRU), is the most enviromentally important process in modern oil and gas processing plants. In this process, the on-line analysis of the plant's tail gas is necessary to achieve and maintain the maximum possible sulfur recovery efficiency. SRU operators need a reliable, accurate analysis which is also free of the common sample handling and conditioning problems commonly associated with tail gas analysis.
THE SOLUTION
AMETEK Western Research, the leader in tail gas analysis for over 25 years, is proud to introduce Model 880-NSL (No Sample Line) tail gas analyzer. This compact, rugged, transmitter-style analyzer mounts directly on your process pipe. The Model 880-NSL was designed using new technological advancements developed to meet your operational demands. The analyzer mounts directly on your process pipe, eliminating sample line plugging. The 880-NSL photometer combines an extraordinary long lamp life (estimated 5 years!) with many innovative features designed to minimize maintenance and increase reliability. The 880-NSL is equipped with anti-clogging blowback features. The analyzer continuously monitors itself for proper operation and has built-in alarm features.
SAMPLE HANDLING AND ANALYSIS
The Model 880-NSL does not have an external sample line. The AMETEK Western Research Model 880-NSL mounts directly on the process pipe.
Designed for low maintenance sample and analysis, the 880-NSL photometer combines an extraordinary long lamp life (estimated 5 years) with many innovative features designed to minimize maintenance and increase reliability.
Anti-Clogging and Blowback Features
Any analyzer fault conditions automatically initiates air blowback to clear the sample system. This feature minimizes the chance of costly downtime by reducing sample line plugging.
Integrated Worldwide Design
Ready to install worldwide with very modest utility requirements.
Self-Diagnostics
Continuously monitors itself for proper operation and has built-in alarm features.
SUPERIOR BENEFITS
- No sample line
- Easy pipemount installation
- Stainless steel construction
- Fast response time
- Provision for instrument air and hot water backflush
- Suitable for US and European Hazardous Area classification
- No moving parts
- Electronic zero and span check
- Microprocessor based electronics with self diagnostic capabilities
- Remote dial in via modem
APPLICATIONS
- Typical Claus Process
- Claus with Tail Gas Cleanup
- Claus with Oxygen Enrichment
Other Product of Interest
| Specifications |
| Methodology: |
Non-dispersive ultraviolet |
| Measurement Range: |
0 to 1% SO2, 0 to 2% H2S, -1 to 1% excess H2S typically (0 to 2% SO2 / 0 to 4% H2S optional) |
| Accuracy: |
H2S and SO2: ±2% of full scale |
| Sensitivity: |
±0.15% full scale |
| Reproducibility: |
±1% of full scale |
| Speed of Response: |
90% in less than 15 seconds, typical |
| Sample Flow: |
2 LPM typical |
| Ambient Temperature: |
-20ºC to 50ºC (-4ºF to 122ºF) |
| Utilities Electrical: |
120/240 VAC 50/60 Hz 720W, single phase |
| Instrument Air: |
490 to 700 kPa (70 to 100 psig ) |
| Steam Pressure: |
For optional ball valve jacket: 515 to 690 kPa (75 to 100 psig)
For optional blow back: 210 to 345 kPa (30 to 50 psig) |
| Outputs: |
Three (3) 4-to-20 mA, self-powered, linear, 1200 ohms load proportional to H2S,
SO2, and either Excess H2S or Ratio
One (1) digital, System Alarm incorporates concentration, overrange, system
errors, and Watchdog alarm (30 Vac, 60 Vdc, 50 VA, maximum, resistive load)
One (1) digital, Data Valid Signal (30 Vac, 60 Vdc, 50VA, maximum, resistive
load)
RS-485 Serial Communication Port, half duplex, two-wire |
| Inputs: |
One (1) digital input for remote auto calibration, contact closure, 5 Vdc @ 2.5 mA
One (1) digital input for remote blowback, contact closure, 12 Vdc @ 100 mA
Note: Provide isolated contact closure only. Do not apply voltage. |
| Digital Communication: |
RS485 serial port. Remote dial-in capabilities available with AMETEK Western Research software |
| Noise: |
±0.5% full scale |
| Zero Drift: |
Less than ±0.5% of full scale in 24 hours through periodic automatic zero standardization using instrument air |
| Calibration: |
Automatic with span filter, manually operated from the controller |
| Process Sample Pressure: |
Not critical |
| Customer-Supplied Items: |
2 in.-150 lbs. or DIN equivalent RF stainless steel flange connection |
| Enclosure Material: |
316 stainless steel |
| Approvals and Certifications: |
UL/CSA General Safety Requirements
UL/CSA Class I, Division 2, Groups A, B, C, D
ATEX II 2 G, EEx p mde [ib] IIC T3
Complies with all relevant European directives
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| Physical Dimensions: |
(H x W x D): 950 x 1037 x 305 mm (37.3 x 41 x 12 inch) |
| Approximate Weight: |
115 kg (250 lbs.) |
Specification Sheet
Technical Papers
Other
- UL/CSA General Safety Requirements
- UL/CSA Class I, Division 2, Groups A, B, C, D
- ATEX II 2 G, EEx p mde [ib] IIC T3
- Complies with all relevant European directives
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