Date post: | 31-Dec-2015 |
Category: |
Documents |
Upload: | moses-oconnor |
View: | 223 times |
Download: | 4 times |
NEXTChem Process Analyzers, Inc.
NEXTChem Process Analyzers, Inc.
NEXTChem is located in Chicago, IL U.S.A.
Our Mission is to build, support and continuously improve the Best Process Analyzers in the World!
NEXTChem Process Analyzers, Inc.
Sampling never requires a filter, decreasing maintenance and increasing reliability
Modern electronics makes programming through the User-Interface very simple
Using the latest innovations in stepper motor control for precise chemical analyses
Combining Multiple Chemical Analyses with Multiple Sample Streams within a single unit
Chemical Measurements with Process Control in a single unit
What makes NEXTChem Analyzers different?
Types of Measurement Techniques
Titration Endpoint Determination(sulfite in sea water)
Standard Addition Ion Selective Electrodes(ammonia in wastewater)
NEXTChem Process Analyzers, Inc.
Titration Curve – Response vs. Concentration
At the point of maximum change in sensor response (endpoint) the sample concentration is zero!
Typical Titration Curve
Sample 1 N sulfuric acid
2
4
6
8
10
12
0 2 4 6 8 10 12
Volume 0.1N NaOH titrated (mL)
pH
Large AdditionSmall Addition
Smallest Addition
The reagent additions are controlled by distance from endpoint for maximum accuracy.
Types of Titrations
Acid / Base -Acetic Acid
Redox -Sulfide
Complexation -Cyanide
Precipitation -Chloride
Color -Hardness
NEXTChem Process Analyzers, Inc.
Three Types of Ion Selective Electrodes
Solid State Membrane:
The membrane is an insoluble crystal of the ion to be determined.
Example: Fluoride, Silver/Sulfide, Chlorine
Gas Permeable Membrane:
A gas permeable membrane separates the sample from the sensor, commonly pH electrode.
Example: Ammonia, Carbon Dioxide
Neutral Carrier Membrane:
The membrane contains an ion specific complexing agent.
Example: Nitrate, Potassium
The characteristics of the ISE aredescribed by the Nernst equation
The Nernst equation :E = E0 + RT ln(10) log (c)
nF
E = Offset + Slope . log (c)
Example of Standard Addition Curve
CalibrationResponse dueTo Spike
Response due to Sample
Color Measurements
Color Dip Probe is used for the measurement:
630 nm Red, 590 nm Yellow, 520 nm Green, and 470 nm Blue
The following analyses can be done with the color measurements:
Total Hardness, Calcium Hardness, Phosphate, Manganese (II) and Zinc
NEXTChem Process Analyzers, Inc.
OMNIChem Advanced
12 Chemical Analyses / 8 Sample Points (industrial)
OMNIChem Basic
8 Chemical Analyses / 4 Sample Points (industrial)
MINIChem Plus4 Chemical Analyses / 4 Sample Points (industrial/municipal)
MINIChem2 Chemical Analyses / 2 Sample Points (municipal)
NEXTChem Process Analyzers, Inc.
HANDYChem
4 Chemical Analyses / 4 Sample Points (industrial/municipal)
ECOChem
2 Chemical Analyses / 2 Sample Points (municipal)
Many Analyses Available
Ammonia (NH3), Nitrate (NO3-), Sulfide (H2S) (Wastewater)
Sulfite (SO3-2), Chlorine (Cl2) (Petroleum)
Acetic Acid (CH3COOH), Nitric Acid (HNO3) (Chemical)
Hardness (Mg+2 & Ca+2), Fluoride (F-) (Drinking Water)
Hydroxide Peroxide (H2O2), Caustic (NaOH) (Textile)
F/T Acid (H3PO4), F/T Alkalinity (H2CO3) (Metal Finishing)
Copper (Cu+2), Silver (Ag+), Cyanide (CN-) (Mining)
Ozone (O3), ABC Analysis (S-2/NaOH/CO3-2) (Pulp/Paper)
NEXTChem specializes in automating Wet Chemical Analyses!
Examples of some Industrial Experiences
City of Fort Wayne alkalinity / pH
Clean Water Services ammonia / alkalinity
China Petroleum cyanide
Eastman Chemical acetic acid & hardness
Procter & Gamble alkalinity / hardness
Bosch high level chlorine
Medtronic low level cyanide
Duke Energy high level hardness
Saudi Aramco sulfite/pH in sea water
Industrial Experiences
Robert Bosch Wiper Systems: Tienen, Belgium
Customer’s Sample: 2.40 g/L chlorine (Cl2) in water (very corrosive)
Measurement: every 10 minutes
Accuracy: + 0.2% relative standard deviation
Industrial Experiences
Saudi Aramco: Dammam, Saudi Arabia
Customer’s Sample: 50 ppm Sulfite (SO3-) in sea water
Measurement: every 10 minutes
Accuracy: + 0.2% relative standard deviation
Measurement Cell
Non Dilution Measurement CellDilution Measurement Cell
Sample Systems
Sample Systems
Micro Dilution: 0.25 mL - 2.00 mL (<0.1mm particles)
Standard Dilution: 5.0 mL - 30.0 mL (<2mm particles)
Standard Non-Dilution: 90 / 140 mL (<3mm particles)
Self-Cleaning Non-Dilution: 90 / 140 mL (<6mm particles)
All Sample Systems are available for all OMNIChem/MINIChem and HANDYChem/ECOChem series analyzers.
Self-Cleaning Sample Valve
This valve makes sampling < 6mm particles possible.
Most common use is in sewage plants.
Used with Clean and Low Concentration Samples
Commonly used in Drinking Water/Final Effluent Applications
Standard Non-Dilution Sample System
Sample Panel Materials
Teflon FEP tubing used in sample panel construction
PVDF is be used for the valve bodies and fittings
Commonly used in Metal Finishing Plants
Standard Dilution Sample System
Sample Panel MaterialsMicro-Dilution Sample System
Used with very clean and very high concentration samples.
All “wetted surfaces” PEEK or Teflon
Commonly used in the Semiconductor Industry and Chemical Plants
Modern Electronics
Why use 1980’s electronics found in most on-line analyzers, when you can have modern electronics?
Modern Electronics
100 MHz CPU - Hitachi SH3 Series 7708
PC / 32 bit processor
4 MB ROM
2 MB RAM
Modbus RTU
Touchscreen Interface
Unicode/ASCII
Up to 57K baud serial communication
Modern Electronics
Modbus is standard on all NEXTChem Analyzers.
Additional Industrial Networks Available
Profibus – DP
DeviceNet
CANopen
ControlNet
LonWorks
CC – Link
FIPIO
Phone Modems and Radio Modems can also be added
What does E-Automation Really Mean?
The analyzer is assigned an IP address and connected to the plant network.
All the screens on the touch screen are available and interactive, making remote changes possible.
Installed at Eastman Chemical in Kingsport, TN USA.
International Considerations
Multi-Language HMI
Universal Power Supply 110/220VAC 50/60Hz
Touchscreen Languages Available
• English is the Primary Language
• The customer selects the second language
Spanish español
Portuguese portuguese
French français
Dutch nederlands
Arabic �ة العربّي
Russian русско
Italian italiano
Chinese 电
• Only MINIChem/OMNIChem Interfaces are Bi-Lingual
• Spanish is the default second language
Easy to use touchscreen !
NO MORE PUSH BUTTONS!
Bright Backlight makes the User Interface easy to read
Precision Reagent Pump
7.500 mL stroke volume
Accuracy + 0.001 mL
Kalrez Seal for long life (1 year)
Communications confirmed with each movement
Pump failures detected within one refill cycle
Stepper Motor with 8335 steps/mL or
0.00012 mL/step
Corrosive Environments
NEMA 4X (IP66) Fiberglass Enclosure
Either a Z-Purge, X-Purge, or ATEX-Purge can be supplied
Z-Purge (Class 1 Div 2) X-Purge (Class 1 Div 1) ATEX-Purge (Zone 2)
Rugged Electronics
Circuit Breaker for the Power Inlet Power Filter for the main power in 110 VAC or 220 VAC Fuses 5mm x 20mm for all internal/external devices All analog inputs have 1.5 kV isolation All analog outputs can have 1.5 kV isolation Industrial Relays with diode protection and easy to replace
Dynamic Electrode Output Display
Electrode measurements are displayed during each analysis
This information is invaluable in determining if the analyzer is operating correctly at a glance