WCDM 100-II
Continuous Sulphuric Acid Dewpoint Temperature Monitor
It is necessary to know the temperature of sulphuric aicd dewpoint temperature(ADT) and exhaust gas for maintaining the operating efficiency of coal or oil-fired boilers. If the sulphuric acid dewpoint temperature is lower than the exhaust gas, then energy is wasted. Operating the boiler at temperatures below the sulphuric acid dewpoint temperature will result in the formation of sulphuric acid inside the boiler and particularly on the 'colder' parts of the plant.
1. The continuous Acid Dewpoint Monitor System adopts an air-cooled probe with a dewpoint detector at its measuring tip. The detector includes a thermocouple which measures detector temperature and a platinum electrode which measures the conductivity of any acid deposited on the detector surface. The probe is constructed from stainless steel and has an operating length of 1.2m/4ft. Within the Probe outer tube is a smaller tube which carries cooling air through a terminal block to the back side of the detector element.
The Electronic Control Unit (ECU) monitors the conductivity between the electrodes on the detector element and develops a control signal. This signal controls the MAFR and thus the temperature of the detector element, i.e., to obtain constant conductivity between the electrodes and ensures that the temperature of the detector element is maintained at the ADT.
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Probe |
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Material: |
Stainless steel |
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Detector: |
Pyrex glass with platinum electrodes |
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Flue Gas Temperature: |
0 to 400 °C / 32 to 750 °F |
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Length: |
0.5m / 1.6 ft standard |
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Weight (Probe): |
2.4 kg / 5.3 lb |
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Weight (M'ting Tube) : |
3.9kg / 8.6lb |
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Electronic Control Unit (ECU) |
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Electronics: |
Microprocessor based |
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Selectable Display: |
Sulphuric Acid Dewpoint Temperature, RBU, |
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Output: |
2 current 4-20mA |
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Accuracy: |
±2 °C / ±4 °F |
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Operating Temperature: |
0 to 50 °C / 32 to 120 °F |
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Weight (M'ting Tube) : |
0 to 50 °C / 32 to 120 °F |
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Input Air Supply: |
3 litres/sec / 6 cfm |
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AC Supply: |
110/240V a.c. 50/60Hz |
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Alarms / Relays: |
Maintenance / Fault |
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Enclosure: |
IP65 / NEMA 4 |
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Weight: |
18 kg / 38 lb |
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Dimensions: |
600 x 600 x 300mm |
Key features & benefits
-Continuous measurement of Acid Dewpoint Temperature
-Automatic Detector Cleaning System
-Electronic Control Unit
-Measures Sulphuric Acid Dewpoint Temperature and Rate of Acid Build-up
-Calculates Minimum Metal Temperature
-Automatic or Manual Operation Control Unit
-Simple to install, reliable operation
-Current loop outputs
-Process Control
-Manage the use of high cost fuel additives such as MgO
-Monitor SO3 slip within an ESP to improve ash collection efficiency whilst minimising acid aerosol emissions
-Thermal Efficiency
-Maximise overall boiler efficiency
-Reduce maintenance caused by cold-end corrosion in maintaining the exit gas above the dewpoint temperature
-Emissions Control
-Monitor acid aerosol emissions (condensables)
-Monitor nad reduce acid smut emissions
Applications
Oil-fired Boiler Systems
Coal-fired Boiler Systems
Oil Burning Backup Systems
Ore Emulsion-fired Boiler Systems
Diesel-fired Boiler Systems