Industrial air pollution emission standards stipulate explicit limit requirements for the contents of NMHC, benzene, toluene, xylene, chlorobenzene, chlorine, alkanes, and more than 40 volatile organism., and require real time monitoring for the content of non - methane hydrocarbons, benzene and other volatile organic waste gases for applications such as rubber mixing, vulcanization equipment exits of tires and other rubber products enterprises ; cold drum, tar storage and tank area of coking chemical enterprises ; workshops and exhaust area of steel - making and battery industry enterprises. Vasthi - NMHC VOCs online analyzer is a new generation of Vasthi NMHC which assist environmental supervision bureau to carry out effective detection and control on industrial emission.

Vair - 9006 - NMHC VOCs online analyzer is a high temperature version of Vair - 9006 - NMHC. There is specialized heating box inside for analytic gas path. By adopting air bath heating method, it can make chromatographic column and gas paths before of after it in high temperature condition. During detection and sampling of high - temp. VOCs for specific pollutants (such as diesel engine emission of shipping vessel, flue gas emission of petrochemical refinery and etc. ), it offers heat tracing for sampling gas path / analysis gas path which will effectively prevent gas of high boiling point and low steam pressure from attaching to the walls of gas path. It can solve the problem of low detection results of gas sample in specific high temperature condition. Foe exclusive structure design.

                                                              Principle
Vair - 9006 - NHMC VOCs online analyzer is also a VOCs monitoring product which adopts GC-FID analysis method widely recognized in the world. GC technology is a gas separation technology that multi-component gas mixture pass through special chemical fillings of chromatographic column, then effectively separated while flow out of the column. For different boiling point and polarity of different components, the gas component of high coiling point and small polarity difference flows slowly and flows out late ; the gas component of low boiling point and big polarity difference flows faster and flows out earlier. Under the conditions of proper column length, temperature and material, gas mixture will be finally separated individually.

FID technology is one of the effective methods for detecting organic of low concentration. After been separated from the column, the gas continuously delivered into the FID detector by the carrier gas. Under high temperature ionization of FID detector hydrogen flame, the gas molecular bond is opened and releases the free ions and electrons. Under high voltage electric field of FID detector, released electrons move to one electrode of the electric field, and generate signal current from the measurement circuit which is related to the quantity of gas components into the detector. The total signal collected at the certain sampling period illustrates the content if the certain gas components.

                                                Application
Coated Furniture Factory / special Gas Lab / Process Control/Textile Printing and Dyeing Plants/Drinks and Food Industries / Flue Gas Emission Control / Fermentation
Control I Chemicals Production or Treatment Plant/Urban Environmental Gas Monitoring/Auto Industry

FEATURES :

• Each time after sampling injection , the analyzer purges sample loop and back blows column automatically, so that the components without detection needs can be rapidly discharged from the system reversely, to shorten the analysis cycle time efficiently.
• It offers heat tracing for whole process, including sample gas collection, transfer and detection by adopting air bath technique and electrical heating to ensure that sample gas of high boiling point will not loss for condensation and attach to column during process.
• Use Silco  steel processing gas lines to greatly reduce the adsorption and residual of the sample gas within the tube wall.
• FID detector has automatic ignition and alarm function after flameout, effective security management and control of the hydrogen flame gas path.
• Analyzer supports multi-detector configuration, continuously analysis the sample gas simultaneously, improve the ability of complex samples analysis.
• Support TCP/IP network remote control of the analyzer,  also support directly site operating analyser  by touching the LCD screen.Can be equipped with flameproof enclosure for installation requirements of anti-explosion occasion.