MERCEM300Z Intelligent mercury monitoring
Florian Greiter, Produkt Management
: Florian Greiter, Product Management 2: SICK AG : Confidential
MERCEM300Z – Table of contents
: System components and measuring principle
: Test results and certification
: Summary
: Florian Greiter, Product Management 3: SICK AG : Confidential
MERCEM300Z – Overall system
Gas sampling system
Heated sample gas line
Bundle of pipes
Exhaust air
Control of main valve
Electrical connections
: Our solution – high temperature
: Florian Greiter, Product Management 4: SICK AG : Confidential
MERCEM300Z – Sample gas supply
Ejector
Sample gas line
: Florian Greiter, Product Management 5: SICK AG : Confidential
MERCEM300Z – Gas flow diagram
CALSIC300
Ejector
Ejector airExhaust gas
Sample probe
Sample gas line Filter
Nozzle
NozzlePressure controlfor flow control
Cell
Optics
Evaporator
1000°C
Cell
: Florian Greiter, Product Management 6: SICK AG : Confidential
MERCEM300Z – Sample gas supply
: MERCEM300Z Ejector principle
: Advantages:
- No moving parts- Wear-free- Flow control via pressure sensors- High gas flow results in short response time
: Benefits
Very low operating expenses Measuring certainty due to control Longest certified measuring gas line with 35m
: Florian Greiter, Product Management 7: SICK AG : Confidential
MERCEM300Z - Design
High temperature cell
: Florian Greiter, Product Management 8: SICK AG : Confidential
All optical measuring principles are based on the measurement of elemental mercury (Hg0) !
Conversion of mercury compounds (Hg+) to elemental mercury (Hg0)
- Wet chemistry: HgCl2 + SnCl2 -> Hg0 + SnCl4
- Thermo converter: approx. 200-400°C
- High temperature: from approx. 800°C
SICK: ~ 1000°C
MERCEM300Z – Hg - Conversion
: Florian Greiter, Product Management 9: SICK AG : Confidential
High temperature
1000 °C
MERCEM300Z – Hg - Conversion
Sample gas outlet
= HgCl2
= Hg
Sample gas inlet
: High temperature conversion
- Heated quartz cell
(1000 °C)
- Double walled
HgCl2 + High temperature Hg0 + Cl2
: Florian Greiter, Product Management 10: SICK AG : Confidential
MERCEM300Z – Design
Optical unit
: Florian Greiter, Product Management 11: SICK AG : Confidential
253.64 253.65 253.660
0.2
0.4
0.6
0.8
1
Wellenlänge /nm
Ab
sorp
tion
, re
l.
Abs1000°
Hg
MERCEM300Z – Measuring principle
Absorption spectrum
elemental Hg
1000°C
II0
How to determine the concentration?
Detector
Hg
Lichtquelle
I0 I
Measuring pathLight source
Reference signal Measuring signal
Abs
orp
tion
Wave length / nm
Conc ~ I0 / I
Atomic absorption spectroscopy
: Florian Greiter, Product Management 12: SICK AG : Confidential
MERCEM300Z – Measuring principleZeeman Atomabsorptionsspektroskopie
B
+-
Photo elastic
modulator (50kHz)
Polarizer
Hg – light source
Detector
Absorption spectrum Hg0
Light source
Chronological differentiation of the signals: 2µs
Light waves of different polarization
: Florian Greiter, Product Management 13: SICK AG : Confidential
MERCEM300Z – Measuring principle
: Advantages of Zeeman - AAS
- Continuous measuring method
- No moving parts
No mechanical wear
Long-term stability
(Maintenance cycle of light source: ≥ 1 year)
- Automatic drift correction for▪ Light source modifications▪ Contamination of optical surfaces
- Identical influence of cross sensitivity components on measuring and reference signal
Best possible cross sensitivity correction
B+-
Hg - Lichtquelle
: Florian Greiter, Product Management 14: SICK AG : Confidential
MERCEM300Z – Measuring principle
: Influence of cross sensitivities; e.g. SO2
Absorption spectrum SO2
-0,50
0,00
0,50
1,00
1,50
2,00
2,50
3,00
3,50
200 210 220 230 240 250 260 270 280 290 300
Wave length
Ex
tin
cti
on
SO2
measuring wave lengths
: Florian Greiter, Product Management 15: SICK AG : Confidential
Absorption spectrum SO2
0,00
0,05
0,10
0,15
0,20
0,25
0,30
253,6445 253,6455 253,6465 253,6475 253,6485 253,6495
Wave length
Ex
tin
cti
on
SO2
MERCEM300Z – Measuring principle
: Influence of cross sensitivities; e.g. SO2
measuring wave lengths
: Florian Greiter, Product Management 16: SICK AG : Confidential
MERCEM300Z – Measuring principle
: Influence of cross sensitivities; e.g. SO2
: Wave length of measuring and reference signal are almost identical
The interference caused by cross sensitivity components stays constant within the wave length interval!
Thus the cross sensitivity is immediately compensated.
Absorption spectrum SO2
0,00
0,05
0,10
0,15
0,20
0,25
0,30
253,6445 253,6455 253,6465 253,6475 253,6485 253,6495
Wave length
Ex
tin
cti
on
SO2
measuring wave lengths
: Florian Greiter, Product Management 17: SICK AG : Confidential
MERCEM300Z – Measuring principle
: Influence of cross sensitivities (results from type approval)
Component Concentration Cross sensitivities on Hg
SO2 1000 mg/m³ - 0.065 µg/m³
H2O 30 Vol% 0.060 µg/m³
HCl 200 mg/m³ no CS
NO 300 mg/m³ no CS
NO2 30 mg/m³ 0.090 µg/m³
O2 21 Vol-% - 0.120 µg/m³
All other tested cross sensitivities are below ± 0.05 µg/m³ = <0.5% certification range
: Florian Greiter, Product Management 18: SICK AG : Confidential
MERCEM300Z – Measuring principle
: MERCEM300Z measuring principle: Zeemann AAS
: Advantages:
- Continuous measurement- No moving parts- Automatic drift correction- Best possible cross sensitivity correction
: Benefits
Easy design – Easy access, no black box
Very low operating expenses
: Florian Greiter, Product Management 19: SICK AG : Confidential
MERCEM300Z – Patented extractive direct measurement
: MERCEM300Z: Patented extractive direct measurement- Measurement within heated cell of about 1.000 °C
: Advantages
- No Hg – recombination- No memory effects- Continuous monitoring of total Hg
: Benefits
- Reliable monitoring of total Hg independent
from plant conditions- Measuring certainty
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MERCEM300Z – Internal adjustment
Optical unit
: Florian Greiter, Product Management 21: SICK AG : Confidential
: MERCEM300Z Integrated Adjustment Cell- Generation of a defined long-term stable Hg - signal
with adjustment cell (patent pending)
: Advantages
- No test gas required- Automatic drift control- Full adjustment of optical bench
: Benefits
- Measuring certainty- Saves operational expenses due to drift control without test gas
MERCEM300Z – Internal adjustment
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MERCEM300Z – Test gas generator
CALSIC300
Vaporizer Sample gas line
: Florian Greiter, Product Management 23: SICK AG : Confidential
: CALSIC300 (option)
- Vaporization of liquid HgCl2-solution of known concentration
- Realization as automated span gas function- Three predefined span concentrations possible- Automatic injection before sampling filter unit
MERCEM300Z – Test gas generator
: Florian Greiter, Product Management 24: SICK AG : Confidential
: MERCEM300Z – CALSIC300
: Advantages
- Adjustment of overall system- Fully automated QAL3 function included- Check of conversion rate included
: Benefits
- Measuring certainty due to check of overall system- Saves operational costs:
▪ No additional costs for test equipment, e.g. test gas, Hovacal ….▪ No additional costs for technician
MERCEM300Z – CALSIC300
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MERCEM300Z – Adjustment during field test
High
Middle
Low
Adjustment cell
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: MERCEM300Z System housing
: Advantages
- Standardized setup- Easy to maintain- Full air conditioning (-20 to +50°C)- Protection grade IP55- Dimensions: H W D
1800mm x 1050mm x 745mm
- Weight: approx. 250 kg
: Benefits
- Convenient and fast access for easy service- Stable measuring results in harsh and/or difficult ambient conditions
MERCEM300Z – Cabinet
: Florian Greiter, Product Management 27: SICK AG : Confidential
MERCEM300Z - Design
High temperature cell
Optical unit
Ejector
Electronics
CALSIC300
: Florian Greiter, Product Management 28: SICK AG : Confidential
MERCEM300Z – Table of contents
: System components and measuring principle
: Test results and certification
: Summary
: Florian Greiter, Product Management 29: SICK AG : Confidential
MERCEM300Z – Certification
: Florian Greiter, Product Management 30: SICK AG : Confidential
MERCEM300Z – Certification
: Florian Greiter, Product Management 31: SICK AG : Confidential
MERCEM300Z – Type approval
: Type approval according to EN15267
- Approved measuring ranges: 0-10/45/100/1000 µg/m³
- Lowest approved measuring range for mercury analyzer: 0 – 10 µg/m³- Highest approved measuring range for mercury analyzer: 0 – 1000 µg/m³
- Unique maintenance interval: 6 months!
- Unique type approved system which is certified to monitor mercury at all relevant
plant types (waste incineration, power plants and cement plants)
: Successful implementation of system at 3 plants where no other mercury monitoring system could be calibrated
- Cement plant (Germany)- Lime plant (Rheinkalk) Germany- Sinter metal plant
: Florian Greiter, Product Management 32: SICK AG : Confidential
MERCEM300Z – Type approval
: Florian Greiter, Product Management 33: SICK AG : Confidential
Raw gas monitoring: waste incineration plant
: Raw gas monitoring at a waste incineration plant
: Hg- Concentrations between 500 µg – 4000 µg
: No change in system setup
: Uninterrupted operation since 4 months
Adjustment with internal CALSIC300
: Florian Greiter, Product Management 34: SICK AG : Confidential
MERCEM300Z – Table of contents
: System components and measuring principle
: Test results and certification
: Summary
: Florian Greiter, Product Management 35: SICK AG : Confidential
MERCEM300Z – Summary
MERCEM300Z
Features
:Precise measurement of “total mercury”
directly in a thermal converter (patented)
:Measuring operation without using consumables
:Very low maintenance gas sampling using
an ejector pump – no moving parts
:Integrated adjustment cell for automatic drift
correction
Benefits
Reliable results of the actual measuring
values of elemental Hg and Hg-
compounds in gases
Very low operating expenses
Minimum maintenance expenditure
Long-term stability without the need of a
technician due to self – adjusting
measuring system
: Florian Greiter, Product Management 36: SICK AG : Confidential
MERCEM300Z – Summary
MERCEM300Z
Features
:Automatic adjustment of the entire
measuring system with a built-in test gas
generator (optional)
:Modular design with the entire system
:Rugged housing for use in harsh industrial
environments
Benefits
Measuring certainty using the fully
automated adjustment with test gas
Convenient and fast access for easy
service and user-friendly remote diagnosis
Stable measuring results in harsh and/or
difficult ambient conditions
: Florian Greiter, Product Management 37: SICK AG : Confidential
MERCEM300Z – Questions ?
MERCEM300ZInnovative mercury monitoring