52 Portable / Field Testing Stack Gas VOC Monitoring
There are various definitions of VOCs. One of the most adopted definition, defines a VOC as any organic compound which is emitted from non-natural processes and has a photochemical ozone creation potential.
A variety of primary and secondary legislation has been introduced to impose limits on industrial VOC emissions. In Europe two regulations are well established: 1. EN 12619 FID method for low concentrations of TOC. It is a standard reference method (SRM) for monitoring TOC from incinerators. It has been validated as suitable for measuring low level gaseous or vapour phase TOC emissions over a range of 0 - 20 mg/m3
TOC found in emissions from processes which use solvents. The standard has been validated as suitable for measuring emissions up to 500 mg/m3
. 2. EN 13526 - FID method for high concentrations of TOC. it has a standard for higher concentrations of .
VOCs are emitted by wide range of different industries. For example, emissions can arise through the evaporation of organic compounds used as solvents; through incomplete combustion of fuels; and through biological degradation of organic matter as in fermentation processes.
Emissions also occur over a wide range of concentrations and emission limits are sector specific. For instance, stack emissions of solvents from coating processes can range between less than 20 mg/m3
up to several thousand g/m3 .
If the stack gas is relatively hot and wet, there is a high probability of condensation when the gas sample touches a cold surface. A FID for stack monitoring should, therefore, be well done in order to prevent condensation of either moisture or VOCs in the sample line (i.e. be equipped with a heated-line and heated detector).
Many simple, unheated, portable FIDs have been designed for applications in health and safety screening and fugitive emissions monitoring. These simple FIDs also usually have a wider spectrum of response factors, so their accuracy and precision will never be as great as the highly engineered, complex, heated FIDs.
Pollution (Italy) Polaris FID is designed to be compliant with EN 12619:1999, EN 13526:2002 and US EPA Method 25A. These regulations impose that the temperature of the coolest point shall be at least 20°C above the flue gas temperature. Since the chimney’s fumes are very hot and they are above the ambient temperature, then the temperature of the sampling line and internal parts of Polaris FID are heated up to 180°C to prevent condensation and reduce adsorption losses.
Polaris FID is a truly portable instrument and completely mounted analyser because in only 13 kilograms it incorporates inside all that is needed for the analysis: batteries, hydrogen storage accumulator,
activated charcoal filter for the combustion air, span gas cylinder for the calibration and technical air cylinder for zeroing signal at every measurement. In addition, there is an input for external gas cylinders (H2, span gas, zero air) when continuous long time monitoring is required. The external optional docking station allows also methane/non-methane output configurations. The integrated CPU automatically control several extra functions: flame injection, the menu-driven handling as well as a full auto testing for any failure.
Another advantage of Polaris FID is described by the hydrogen cartridge. It doesn’t contain hydrogen at high pressure. Here the hydrogen is chemically bonded with a special metal alloy and it is slowly released assuring about 30 working hours.
Even when the oxygen levels are unpredictable, Polaris FID well handles and minimises the effects of oxygen synergism. If you know how it’s hard to work upon the chimney, you can appreciate compact and lightweight instruments.
For More Info, email:
26237pr@reply-direct.com New Barometric Pressure Sensor
The latest innovation from Felix Technology (Canada) is a Barometric Pressure Sensor FT5006 that combines high accuracy and low power over a wide range of pressures and temperatures.
The model FT5006.10 provides a calibrated 0-5 VDC analogue output. Analogue current consumption is less than 3mA. A special “sleep” mode further reduces current to about 1 µA. RS232 serial output is also available in the standard sensor.
The model FT5006-20 features a standard 4-20 mA analogue output. Two serial options, RS-232 and RS-485, are included in this model. The compact size of the barometer allows easy mounting in almost any standard instrument enclosure.
A plug-in connector simplifies wiring. The weatherproof enclosure offers a convenient mounting location while the pressure port helps minimise dynamic pressure errors due to severe wind.
For More Info, email:
26234pr@reply-direct.com
Mobile Gas Analysis for Pressure Lines
With their new "Oxybaby P", Witt-Gasetechnik (Germany) have introduced a hand held portable
analyser that determines the O2/CO2 gas levels in a pressurised supply line.
As many portable devices for gas analysis can only be used for low-pressurised test objects such as modified atmosphere packaging the gas pressure in supply lines is much too high for the sensitive measuring cells of the analyser. By integrating an ultra-compact pressure regulator in the newest version of its proven hand-held analyser, "Oxybaby", Witt now allows inlet pressures of up to 10 bar. Depending on the requirements, the Oxybaby determines the concentration of oxygen and/or carbon dioxide in a range of 0 – 100 %, and displays the results in increments of 0.1 %.
European Environmental Protection Legislation Essential Environment is the comprehensive guide to UK and EU environmental protection legislation.
Written in clear, simple language, the 35th Edition of the
Essential Environment handbook cuts through the legal jargon and provides comprehensive and up-to-date information and guidance.
Topics covered include:
• Industrial Pollution Control • Air Quality and Air Pollution, Climate Change, Transport Pollution • Environmental and Neighbourhood Noise, Statutory Nuisance • Local Environmental Quality •Waste Management, Land Quality, Contaminated Land
• Water Pollution, Marine Pollution, Pesticides, and Agricultural Pollution
• Sustainable Development, Land Use Planning. This book is available in Hard Copy or online at
www.essentialenvironment.org.uk IET Annual Buyers Guide 2013
www.envirotech-online.com
This opens up entirely new possibilities for quality controllers: The new version of "Oxybaby P" allows the composition of a gas mixture to be monitored at any location in the gas line as well as directly at the point of consumption. This will insure the accuracy of the gases before the gas consumer has been connected whether the line contains the required gas or whether the mixture has the correct concentration. The handling is very simple: The hand-held device and the extraction point are simply connected by a small hose. The version for the conventional G1/4" male thread with collar nut is included in the scope of delivery. Other versions are optionally available.
In addition to the system advantage, the benefits of the device include the easy, single-hand operation, the small size of the shock-resistant housing (approximately 18 cm), the long-lasting and fast- charging battery, the low weight (approximately 600 g) and the illuminated LCD display with intuitive user interface in several languages. Even at the maximum measuring range, the measurement itself takes at most ten seconds, must faster than Thermal Conductivity gas analysers. The integrated circulating memory on the 6.0 models captures the results for 500 measurements. Data transfer to a PC for further processing is possible via a USB connection. Upgrades such as a bar code reader and Bluetooth are planned.
For More Info, email:
25460pr@reply-direct.com
EDITION NEW
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136
