1. Ambient Air Monitoring

2. Analyze IT Ambient Air Monitoring - The Necessity
Hazardous Chemical plants increasing
Plants and residential areas closely located
Awareness on pollutants is increasing
Environmental agencies imposing regulations and fines
Safety of plant personnel

3. Ambient Air Monitoring - The Challenges
Multiple areas and locations need to be measured. Individual analyzers in each location is a very expensive idea
Many possible interfering components. Gas detectors are not a solution as they are not specific to the toxic component that needs to be measured
Ability to detect ppm / ppb trace levels
Fast Analysis time with frequent updates
Ability to handle enormous amount of data and report the same in useful formats recommended by the environmental agency
Ability to transport representative samples at ppm levels over a long distance
Reliable measurements - as this is directly related to the safety of the personnel

4. Ambient Air Monitoring - Technologies
Online Gas Chromatographs
Reasonable costs
Multi stream capability (32 streams)
Ability to separate interfering components from measured toxic component
Trace HC measurement using Flame Ionization Detectors
Fast analysis times using simultaneous dual detectors (32 str in 16 min - VCM)
Ability for connection to PCs and DCS for data handling / reporting
Engineered sample systems for obtaining representative samples
Reliable hardware / software
Extensive vendor support

5. Ease of Use and Flexibility
VN2300 connections
Analog and Digital Inputs and Outputs
Serial Printer connection
Built in LCD and Keypad Interface
Easy to use Plain Language Menus
Chromatogram viewing and storage

6. PGC2000 Oven - “Basic Arrangement”
ABB CP Column Switching Valve
ABB TC Detector
Oven Air Bath Heater
Analytical Packed Column

7. ABB Continuous Performance Valve - CP
Accommodates packed or capillary columns
Automatic wear compensation and slider tension loading
Samples up to 150 PSI and 180oC

8. Flame Ionization Detector
Highly sensitive, Low ppm level
Hydrocarbon detection
Extremely compact design
Automatic Re-ignition - standard

9. How does it work?
Strip Chart Recorder
Detector
Injector
Columns

10. Benzene in Ambient Air

11. Vinyl Chloride in Ambient Air

12. Acrylonitrile in Ambient Air

13. Ambient Air Monitoring Sample System
Multi stream sample system
Automatic stream selection by GC
Delivery of representative sample to GC
Fast loop run by dual pumping or aspirator system
Material selection based on Application

14. Sample System Schematic Eductors

15. Sample System Schematic with Pumps

16. Data Analysis / Reporting Details
Critical portion of the Ambient Air Monitoring is gathering, storage, analysis and presentation of the GC data
A combination of standard software and hardware products available from ABB can be integrated in to a customized comprehensive, PC based data system
Data is collected and analyzed by the customized software allowing presentation and storage of important information such as Time Weighted Averages of measured components, personnel exposure levels and alarm set-point excursions

17. Data System Layout PLC Alarm Lamps New Control Room Equip. Domain 0.1
DCS
serial Communication
New Control Room Equip.
VNET2.0 Gateways
8 Port Ethernet Switch 10 /100 Base T
PLC
Workstation PC / Printer
Vistanet Router
Domain 0.1
GC1
0.8
Alarm Lamps
0.7
0.6

18. OPC Awareness Built-In
OLE for Process Control
Fundamental Building Block
VistaNET2.0 Gateway
uses OPC Server Technology
Communications Clients
MODBUS
Serial Links
20V4
20V7
MOD V SAP

19. What is OPC? A Standard Set of
Interfaces
Properties
Methods
That defines how individual software components can interact and share data.

20. HOW OPC works?
Each vendor creates software that “speaks” to their own equipment, using the “native tongue”.
This software module also speaks OPC.
Load software from two or more vendors…
And they can “talk” to each other!

21. OPC does Allows OPC “aware” applications to exchange data.
Allows various vendors to participate.
Provides information in its native format and syntax
Provides a browser to facilitate configuration.

22. OPC Doesn’t Generate hard copies Generate screens Draw pictures
Require intermediate mapping
Like MODBUS

23. Data Analysis / Reporting Details - Software
HMI (Human/Machine Interface) is the computer system. Printer available for reports
3 OPC servers are installed in the computer
VistaNET OPC server interfaces the GC data with the HMI program for the reports.
ODBC OPC server interfaces the HMI program with the Microsoft Accesss. Data generated via HMI program is stored in various data base tables.
ABB 800 C OPC server interfaces HMI program with the ABB 800 C PLC. Thus the HMI program will control the relay outputs of the 800 C PLC.
Visual BASIC programs generate the 12 hr & monthly reports - current & historical / raw data file / calibration data etc.

24. Data Analysis / Reporting - Main Screen

25. Data Analysis / Reporting details
Main screen - Each Stream Result, 12 hr TWA, Max concn, Time of Max, Number of times the alarm limit has been exceeded - in the current 12 hr period
Alarms displayed in the bottom of the main screen
HMI gathers the 12 hr data and stores it in to a temp. data base file - which is used to generate the 12 hr report. A similar routine is done for monthly report.
Every 15 minutes all of the raw data is stored in the Raw Database
Automatic calibration / benchmark can be done on a predetermined frequency. HMI program will store the calibration / benchmark data.

26. Ambient Air Monitoring - Other Technologies
Industrial Mass Spectrometer
More expensive
No significant advantage in analysis times - as the GC with Simultaneous Dual Detectors offer 30 secs per stream