LAND Model 440 Continuous Monitoring System

		Model 440 Continuous Monitoring System

Benefits of sulfuric acid dew point monitoring
In order to maintain the operating efficiency of coal or oil-fired boilers, it is important to know that the temperature of the exhaust gas is above the sulfuric acid dew point temperature (ADT). If it is much higher than the sulfuric acid dew point temperature, then energy is wasted heating the gas and efficiency drops. Operating the boiler at temperatures below the sulfuric acid dew point temperature will result in the formation of sulphuric acid inside the boiler and particularly on the 'colder' parts of the plant.

Sulfuric acid dew point temperature monitoring ensures that the optimum point is maintained - just above the sulfuric acid dew point - where no sulfuric acid is being formed, but efficiency is maximized.

Continuous sulfuric acid dewpoint temperature monitor
It is permanently installed in order to optimize combustion conditions by maintaining the temperature of the flue gas slightly above the sulfuric acid dew point temperature. It can continuously monitor the changes in boiler operation and provide a direct loop input to the boiler's own combustion control system.

Features

Continuous measurement of acid dew point temperature
Automatic detector cleaning system
Electronic control unit
Measures sulfuric acid dew point 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

Applications

Oil-fired boiler systems
Coal-fired boiler systems
Oil burning backup systems
Ore emulsion-fired boiler systems
Diesel-fired boiler systems

Model 440 Continuous Monitoring System

Specifications
Probe
Material:	Stainless Steel
Detector:	Pyrex glass with platinum electrodes
Flue Gas Temperature:	0 to 400º C / 32 to 750º F
Length:	1.2m . 4 ft standard
Weight (Probe):	2.4 kg / 5.3 lb
Weight (M'ting Tube):	3.9kg / 8.6 lb
Mounting Flange:	Land supplied
Electronic Control Unit (ECU)
Electronics:	Microprocessor based
Selectable Display:	Sulphuric Acid Dewpoint Temperature, RBU, Ambient Temperature, MMT, Current, SO₃
Output:	2 current 4 - 20mA (0 to 260º C / 0 to 500º F)
Accuracy:	+2º C / + 4º F
Operating Temperature:	0 to 50º C / 32 to 120º F
Input Air Supply:	3 litres/sec / 6 cfm
AC Supply:	110/240V a.c. 50/60Hz
Alarms / Relays:	Maintenance / Fault One common relay
Enclosure:	IP65 / NEMA 4
Weight:	18 kg / 38 lb
Dimensions:	600 x 380 x 210 mm/ 23.6 x 15 x 8.3 inches
Air Flow Regulator and Detector Cleaning System (ACU)
Enclosure:	IP65 / NEMA 4
Air Flow Rate:	3 litres/sec / 6 cfm
Air Pressure:	60 to 100 psi / 4 to 7 bar
Operating Temperature:	0 to 65º C / 32 to 160º F
Water Flow Rate:	4 litres/day maximum usage
Water Pressure:	20 psi / 1.4 bar
Dimensions:	600 x 600 x 210mm 23.6 x 23.8 x 8.6 inches
Weight:	29.5 kg / 65 lb