MERCEM300Z
Intelligent mercury monitoring
Florian Greiter, Produkt Management
MERCEM300Z – Table of contents
:
System components and measuring principle
:
Test results and certification
:
Summary
: SICK AG
: Confidential
: Florian Greiter, Product Management
2
MERCEM300Z – Overall system
: Our solution – high temperature
Gas sampling system
Bundle of pipes
Control of main valve
Electrical connections
Heated sample gas line
Exhaust air
: SICK AG
: Confidential
: Florian Greiter, Product Management
3
MERCEM300Z – Sample gas supply
Ejector
Sample gas line
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: Confidential
: Florian Greiter, Product Management
4
MERCEM300Z – Gas flow diagram
Ejector
Exhaust gas
Ejector air
Nozzle
Cell
1000°C
Pressure control
for flow control
Optics
Sample probe
CALSIC300
Nozzle
Sample gas line
Filter
Evaporator
: SICK AG
: Confidential
: Florian Greiter, Product Management
5
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
6
MERCEM300Z - Design
High temperature
cell
: SICK AG
: Confidential
: Florian Greiter, Product Management
7
MERCEM300Z – Hg - Conversion
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
8
MERCEM300Z – Hg - Conversion
:
High temperature conversion
-
-
Heated quartz cell
(1000 °C)
Sample gas outlet
Sample gas inlet
Double walled
High temperature
1000 °C
= HgCl2
= Hg
HgCl2 + High temperature  Hg0 + Cl2
: SICK AG
: Confidential
: Florian Greiter, Product Management
9
MERCEM300Z – Design
Optical unit
: SICK AG
: Confidential
: Florian Greiter, Product Management
10
MERCEM300Z – Measuring principle
Hg
How to determine the
concentration?
I0
I
Lichtquelle
Light
source
1
Detector
Measuring path
Reference signal
Measuring signal
Absorption spectrum
Conc ~ I0 / I
Absorption
0.8
Absorption, rel.
Atomic absorption
spectroscopy
elemental Hg
1000°C
0.6
Ab s1 0 0 0 °
0.4
0.2
0
I0
I
253.64
253.65
253.66
 Hg
Wave length / nm
Wellenläng e /nm
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: Confidential
: Florian Greiter, Product Management
11
MERCEM300Z – Measuring principle
Zeeman Atomabsorptionsspektroskopie
Absorption
spectrum Hg0
Detector
Polarizer
Chronological
differentiation of the
signals: 2µs
Photo elastic
modulator (50kHz)
s-
s+
Light waves of different
polarization
B
Light source
Hg – light source
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: Confidential
: Florian Greiter, Product Management
12
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)
-
-
s-
B
Automatic drift correction for
▪
Light source modifications
▪
Contamination of optical surfaces
s+
Hg - Lichtquelle
Identical influence of cross sensitivity components on measuring and reference signal
 Best possible cross sensitivity correction
: SICK AG
: Confidential
: Florian Greiter, Product Management
13
MERCEM300Z – Measuring principle
:
Influence of cross sensitivities; e.g. SO2
Absorption spectrum SO2
3,50
3,00
Extinction
2,50
2,00
1,50
SO2
measuring wave lengths
1,00
0,50
0,00
200
210
220
230
240
250
260
270
280
290
300
-0,50
Wave length
: SICK AG
: Confidential
: Florian Greiter, Product Management
14
MERCEM300Z – Measuring principle
:
Influence of cross sensitivities; e.g. SO2
Absorption spectrum SO2
0,30
0,25
measuring wave lengths
Extinction
0,20
0,15
SO2
0,10
0,05
0,00
253,6445
253,6455
253,6465
253,6475
253,6485
253,6495
Wave length
: SICK AG
: Confidential
: Florian Greiter, Product Management
15
MERCEM300Z – Measuring principle
:
Influence of cross sensitivities; e.g. SO2
Absorption spectrum SO2
0,30
0,25
measuring wave
lengths
Extinction
0,20
0,15
SO2
0,10
0,05
0,00
253,6445
253,6455
253,6465
253,6475
253,6485
253,6495
Wave length
:
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.
: SICK AG
: Confidential
: Florian Greiter, Product Management
16
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%
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
0.060 µg/m³
All other tested cross sensitivities are below ± 0.05 µg/m³ = <0.5% certification range
: SICK AG
: Confidential
: Florian Greiter, Product Management
17
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
18
MERCEM300Z – Patented extractive direct measurement
:
MERCEM300Z: Patented extractive direct measurement
-
:
Advantages
-
:
Measurement within heated cell of about 1.000 °C
No Hg – recombination
No memory effects
Continuous monitoring of total Hg
Benefits
-
-
Reliable monitoring of total Hg independent
from plant conditions
Measuring certainty
: SICK AG
: Confidential
: Florian Greiter, Product Management
19
MERCEM300Z – Internal adjustment
Optical unit
: SICK AG
: Confidential
: Florian Greiter, Product Management
20
MERCEM300Z – Internal adjustment
:
MERCEM300Z Integrated Adjustment Cell
-
:
Advantages
-
:
Generation of a defined long-term stable Hg - signal
with adjustment cell (patent pending)
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
21
MERCEM300Z – Test gas generator
Vaporizer
Sample gas line
CALSIC300
: SICK AG
: Confidential
: Florian Greiter, Product Management
22
MERCEM300Z – Test gas generator
:
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
23
MERCEM300Z – CALSIC300
:
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
24
MERCEM300Z – Adjustment during field test
Adjustment cell
High
Middle
Low
: SICK AG
: Confidential
: Florian Greiter, Product Management
25
MERCEM300Z – Cabinet
:
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
26
MERCEM300Z - Design
High temperature
cell
Ejector
Optical unit
Electronics
CALSIC300
: SICK AG
: Confidential
: Florian Greiter, Product Management
27
MERCEM300Z – Table of contents
:
System components and measuring principle
:
Test results and certification
:
Summary
: SICK AG
: Confidential
: Florian Greiter, Product Management
28
MERCEM300Z – Certification
: SICK AG
: Confidential
: Florian Greiter, Product Management
29
MERCEM300Z – Certification
: SICK AG
: Confidential
: Florian Greiter, Product Management
30
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
31
MERCEM300Z – Type approval
: SICK AG
: Confidential
: Florian Greiter, Product Management
32
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
: SICK AG
: Confidential
: Florian Greiter, Product Management
33
MERCEM300Z – Table of contents
:
System components and measuring principle
:
Test results and certification
:
Summary
: SICK AG
: Confidential
: Florian Greiter, Product Management
34
MERCEM300Z – Summary
MERCEM300Z
Features
Benefits
:Precise measurement of “total mercury”
directly in a thermal converter (patented)
 Reliable results of the actual measuring
values of elemental Hg and Hgcompounds in gases
:Measuring operation without using
 Very low operating expenses
consumables
:Very low maintenance gas sampling using
 Minimum maintenance expenditure
an ejector pump – no moving parts
:Integrated adjustment cell for automatic drift
correction
: SICK AG
: Confidential
 Long-term stability without the need of a
technician due to self – adjusting
measuring system
: Florian Greiter, Product Management
35
MERCEM300Z – Summary
MERCEM300Z
Features
Benefits
:Automatic adjustment of the entire
measuring system with a built-in test gas
generator (optional)
 Measuring certainty using the fully
automated adjustment with test gas
:Modular design with the entire system
 Convenient and fast access for easy
service and user-friendly remote diagnosis
:Rugged housing for use in harsh industrial
 Stable measuring results in harsh and/or
difficult ambient conditions
environments
: SICK AG
: Confidential
: Florian Greiter, Product Management
36
MERCEM300Z – Questions ?
MERCEM300Z
Innovative mercury monitoring
: SICK AG
: Confidential
: Florian Greiter, Product Management
37