Model 900 Tail Gas-Air Demand Analyzer

Model 900 Air Demand Analyzer

Overview
In the past, conventional Claus Sulfur recovery processes were adequately controlled on the basis of ratio or excess process air.  The development of new and modified sulfur recovery processes has dramatically changed the analytical requirements placed on the tail gas analyzer.  These applications require accurate chemical concentration data over wide dynamic ranges.  Selective oxidation processes may require the analyzer to control the H2S/SO2 ratio at values ranging from 1:7 to greater than 10:1.  In addition there is an increased need to provide reliable process data during upset conditions to endure correct response to such conditions.

AMETEK Process Instruments Model 900 Air Demand Analyzer was specifically designed to meet the more demanding analytical requirements of these new processes.  Used in conjunction with the ASR 900 sampling probe, the Model 900 ensures maximum data availability for optimum operation of all sulfur recovery processes.

Features

  • Measures up to five species simultaneously - H2S, SO2, Sv, COS, CS
  • Uniquely capable of monitoring off-ratio applications
  • Reliable, trouble-free sampling
  • Automated zero gas calibration
  • Modbus serial interface with plant DCS    
To learn more about the Sulfur Recovery Process, please visit our website sru.ametekpi.com.
  • Specifications +


    Methodology: Multiple wavelength, high resolution, nondispersive UV
    Species Measured Minimum Full Scale Maximum Full Scale
    H2S 5000 ppm 10%
    SO2 2500 ppm 10%
    CS2 5000 ppm 10%
    COS 5000 ppm 10%
    Sv 50 ppm 500 ppm
    Accuracy1 Better than 1% full scale
    Repeatability1 Better than 0.5% full scale
    Linearity1 Better than 1% full scale
    Response Time Typically less than 30s to T90 (excluding sample system)
    Number of Gases Up to 5 simultaneously (refer to AMETEK for possible combinations)
    Sample Transport Air aspiration
    Typical Sample Flow 3 to 5 L/min (0.1 to 0.2 CFM)
    Temperature Control Independent control of four zones (oven, sample line, probe, vent line)
    Ambient Temperature 5° to 50°C (41° to 122°F)
    Instrument Air Minimum 413.6KPa (60 psig), 120 L/min (4.24 CFM), instrument quality air
    Power 120 VAC ±10%, 47-63 Hz or 240 ±10%, 47-63 Hz; 600 W for analyzer only excluding sample and vent line and ASR probe
    Analog Outputs 4 to 20 mA self-powered (optional loop-powered), maximum of 4
    Communications RS422 with Modbus protocol
    RS485 optional
    Ethernet optional
    Relays 3 independent sets of SPDT relays alarm conditions
    Physical Dimensions 1553.6 x 1117.6 x 306 mm (61.17 x 44 x 12 in.)
    Weight Estimated minimum 160 kg (350 lbs)
    Approvals and Certifications NEC/CEC Class I, Division 2, Groups C & D
    ATEX II 2G EEx pd IIB T3
    Russian Ex Proof Certification; 1ExpydIIBT3
    Russian Gosstandart Pattern Approval
    Complies with all relevant European Directives
    1. States specifications apply to SO2 and H2S only. Please consult factory for specifications on other species.
  • Documents +

  • Certifications +


    • NEC/CEC Class I, Division 2, Groups C & D
    • ATEX II 2G EEx pd IIB T3
    • Russian Ex Proof Certification; 1ExpydIIBT3
    • Russian Gosstandart Pattern Approval
    • Complies with all relevant European Directives
  • Applications +


    • Conventional Claus processes
    • Selective oxidation processes
    • Coke ovens