AMETEK Land Lancom - Model 200 - Sulphuric Acid Dewpoint Portable Monitoring Device
From Combustion Efficiency Monitors
A portable monitoring device using conductive cell technology for accurate, periodic measurements of the Acid Dewpoint Temperature (ADT) in combustion processes. Designed specifically to provide the unique but vital measurement of sulphuric acid dewpoint temperature, the portable Lancom 200 supports boiler efficiency checks, corrosion protection and the management of high-cost fuel additives.
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Product Overview
Designed specifically to provide the unique but vital measurement of sulphuric acid dewpoint temperature, the portable Lancom 200 supports boiler efficiency checks, corrosion protection and the management of high-cost fuel additives.
Easy-to-use ADT monitoring lets boiler operators balance acid emissions with efficiency, reducing the risk of corrosion in the boiler and wasted heat/fuel. This lowers operational costs and reduces harmful sulphate aerosol emissions.
Incorporating 40 years of AMETEK Land’s application expertise, Lancom 200 obtains an accurate reading in minutes. By generating a measurable current when sulphuric acid forms on the conductive cell, it makes a direct measurement for ADT.
Specially developed for plants requiring only periodic monitoring of sulphuric acid dewpoint temperature for boiler efficiency, the Lancom 200 is suitable for applications in the hydrocarbon processing and power generation industries.
ACCURATE MEASUREMENTS OF ADT
Using a conductive cell technique to measure the sulphuric acid dewpoint temperature, the Lancom 200 is accurate to within ±0.5°C, allowing a precise calculation of both sulphuric acid and sulphur trioxide concentrations, vital for optimum combustion efficiency and emissions compliance.
A PORTABLE SOLUTION
Weighing just 10kg (22lb), the device is easily carried around the plant. It operates from mains supplies or for up to eight hours using internal battery power. All that’s needed is a local compressed air supply and a suitable sampling point for probe access.
SIMPLE TO SET UP AND MEASURE
Just one person is required to set up and operate the Lancom 200, obtaining complete measurement data in just a few minutes. The built-in screen makes it easy for operators to maintain the required steady current flow.
The portable Lancom 200 is AMETEK Land’s dedicated solution for sulphuric acid dewpoint monitoring.
APPLICATION NOTE
MEASURING ACID DEWPOINT TEMPERATURE TO IMPROVE EMISSIONS AND EFFICIENCY
Measurements of the Acid Dewpoint Temperature (ADT) are important for combustion efficiency, environmental compliance and process optimisation on a variety of coal and oil-fired processes. The Lancom 200 portable analyser provides valuable tools for ADT measurement. Read More > Watch the Video >
Features
- Measure acid dewpoint temperature
- Understand where acid condensation occurs
- Calculate S03 and H2S04 concentrations
- Reduce sulfate aerosol formation
- Fully portable - just requires compressed air supply
- Data logging
- Built-in printer
- Easy to maintain
Benefits
- Optimize flue temperature and improve efficiency
- Avoid cold-end corrosion
- Manage fuel additive use
- Reduce opacity caused by 'blue plume'
- Can measure throughout the flue gas path
- Store readings for later analysis
- Hard copy at the measurement point
- Cell can be replaced in the field
How the Analyser Works
Acid Dewpoint Temperature
The acid dewpoint temperature is the point at which the rates of evaporation and condensation are equal. The LANCOM 200 makes a direct measurement - requiring no calibration or reference.
The Conductive Cell Technique
An acid film, such as sulfuric acid, is a good conductor of electricity. If a surface bearing two electrodes is introduced into a gas containing sulfuric acid vapor, any condensate forming on the surface would soon be detected by a current flowing between the electrodes.
The LANCOM 200 comprises a stainless steel probe (to withstand acid corrosion) with a conductive cell (shown left) mounted at the tip. The detector contains two electrodes which detect any acid deposition. The temperature of the detector is controlled by a flow of cooling air directed onto its inner surface. The flow of air is controlled manually using the panel-mounted regulator. When the probe is inserted in the gas stream and the cooling air applied, the detector temperature falls until a point is reached where a thin film of sulfuric acid begins to condense on its surface. The condensed acid causes a current to flow across the electrodes, which is monitored by the LANCOM 200.
All the LANCOM 200 requires is an air supply. Integral batteries can provide up to 8 hours continuous operation. The operator simply has to watch the display, adjust the air flow and wait for the detector current reading to stabilize -then press enter to store the ADT reading. All the associated measurement data are stored in a log file.
Specification & Design
Simple Setup – Measurement Data in Minutes
The monitoring unit is normally operated inside its carry bag. All that is required is a local compressed air supply, and a suitable sampling point for probe access. It requires only one person and no special skill to take the readings. The operator has to adjust the air supply and obtain a steady current flow on the display.
Complete measurement data is available in a few minutes. The vital data it provides is essential for process control, thermal efficiency and emissions control applications.
Standard Features
- Lancom 200 analyser & carrying case
- Sample Probe & carrying case (1.2 m, 2.1 m and 3.0 m available)
- Built-in Thermal Printer
- Data Logging
- RS232, RS485 and USB ports
- Interconnecting signal cables and air hoses (3 m / 10 ft)
Applications
Thermal Efficiency
Operating above the acid dewpoint temperature Identifying the lowest metal temperature required to minimize or eliminate corrosion, allows the operator to reduce the flue gas temperature, which minimizes heat loss and improves overall efficiency.
Additionally, the pre-heating of the combustion air to increase efficiency will drop the exit gas temperature often below the acid dewpoint temperature.
Minimize cold-end corrosion by maintaining the exit gas above the dewpoint temperature
Sulfuric acid will condense on any surface below the dewpoint temperature. These surfaces, typically include economizers, air pre-heaters, ID fans and stack walls. The corrosion of process equipment such as these can involve complete process shut down and involve costly repair.
Specification
- Measuring Technique: Conductive Cell Technique
- Acid Dewpoint Temperature: 120 - 200 °C (248 - 390 °F) Displayed in °C or °F.
- Flue Gas Temperature: 0 - 450 °C (32 - 840 °F) Displayed in °C or °F
- Calculated Values: H2, SO4, SO3, Minimum Metal Temperature (MMT)
- Uncertainty: ± 0.5 °C dewpoint temperature
- Resolution: 0.1 °C
- Detection Limit: Application dependent, typically 125 °C (257 °F) or 5 ppm SO3
Control Unit
- Display: 1/4 VGA Color LCD
- Data Logging: All data values logged. Log interval 1 sec. to 10 min.. Storage for > 10000 records. Rechargeable battery 2 x 6 V 4 Amp. hour. Typical 8 hr. operation
Compliance and Environmental
- Power Supply: 95-265 V a.c. ±10%, 50-60 Hz, 30 Watts
- Electrical Safety: EN 61010-2
- EMC: EN 61326 (industrial)
- Protection from Dust & Water: Instrument in bag; IP42 of BS EN 60529, Probe: IP65 of BS EN 60529
- Vibration (Probe Only): BS EN60068-2-6 (10 Hz to 150 Hz at 19.6 ms-1 )
- Operating Temperatures: -20 to +50 °C (-4 to 122 °F)
Inputs/Outputs
- Modbus Communications: RS232/RS485 Isolated 2-wire, RTU mode, 19200 baud, 8 data bits, even parity, 1 stop bit
- 4-20 mA Outputs: 8 channels (4 - 20 mA) ±0.1 mA non-isolated, 300 Ω max
- USB Interfaces: USB master for Flash Memory devices. USB function ActiveSync for connection to a PC
Air Requirements
- Air Supply: Clean, dry, oil-free air, 4-10 bar (60 - 150 psi)
- Flow Rate: 1 to 150 l/min (0.05 to 5 cfm) at 4 bar (60 psi), Max. 600 l/min (20 cfm)
- Air Connection: ISO G3/8 (3/8 BSPP) male thread supplied
Mechanical
- Overal Size in Carry Bag: 500 x 225 x 300 mm (20 x 9 x 12 in.)
- Weight (incl. Bag and Hoses): 9.8 kg (22 lb.)
- Cables and Hoses: 2 air hoses, signal and power cables supplied, all 3 m (10 ft.)
Sample Probe
- Material: Stainless Steel
- Detector: Pyrex glass with platinum electrodes
- Calibration: Option for UKAS calibration
- Probe Access Port: Minimum requirement 50 mm / 2 inches diameter
- Insertion Length: 1.2 m (4 ft.) standard; Optional 2.1, 3.0 m (7, 10 ft.)
- Weight (in Bag): 6.2 kg (14 lb.), 8.6 kg (19 lb.), 11 kg (24 lb.)
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