Zhejiang Highpower Environmental Technology Ltd. There is a growing number of laboratories and research units that need to procure gas analyzers. However, given the large number of brands and varying performances of the flue gas analyzers, there is often no choice, and prices are often the only ones that matter, with the result that they cannot be purchased for their own best use.
The third issue of the Instrument Purchase Weekly, on which CEMS is the subject of procurement, covers instruments, solutions, selected articles, information, etc., with the aim of providing a certain amount of reference and assistance to a wide range of instrument users in the selection and application of instruments. Zhejiang Highpower Environmental Technology Co. Ltd.
There are two common ways in which flue gas analyzers work:
One is the principle of electrochemical work, the other is the principle of infrared work.
Portable flue gas analyzers in the current market are usually a combination of these two principles, and the electrochemical flue analyzers are typically made in Fezor, Germany, Germany, and Germany, in Germany, in Germany, in Germany, in the form of an i-gas analyzer, in Germany, in the form of an i-gas analyzer, in Germany, in the form of an i-gas analyzer.
The following is a brief description of how to select a smoke analyzer: Zhejiang Highpower Environmental Technology Ltd.
1. Sensors:
The measurement units covered by the current mainstream flue gas analyzer consist mainly of two sensors:
1) Electronic chemical sensors: Advantages:
a Small size: therefore, the handheld machine type is generally electrochemical.
b Cheap: a cheaper price and, if the budget is lower, a smoke analyzer for electrochemical sensors can be selected:
a A slight difference in accuracy: the general error is 5 per cent of the reading, which meets national environmental standards alone.
b Cross-disruption: EMC sensors are vulnerable to interference from other gases, increasing errors in measurements.
c Short life: Life expectancy is usually 2-3 years, so replacement is always considered. Zhejiang Highpower Environmental Technology Co. Ltd.
2) Non-dispersible infrared sensors:
Advantages:
a The measurements are accurate: the general test results do not exceed 2% of the full range and can be used as analytical precision instruments.
b There is no cross-interference: other gases do not cause test interference with infrared sensors due to measurement principles.
c Long lifespan: Infrared sensors generally have no concept of lifetime, are used for very long periods, are generally over 10 years and do not require special maintenance on a daily basis, and are gradually becoming mainstream sensors:
a Less expensive: prices are typically several to ten times higher than those of electrochemical sensors.
2. Sampling systems:
The sampling systems for the flue gas analyzer are divided into conventional and heated sampling systems.
1) Conventional sampling systems: alkalis are generally used, high-temperature plastic tubes are used to ensure that gases are not adsorbed.
Application: Short-term tests with lower water content; short-term tests with no acid-free gases.
2) Heating sampling systems: This is the integration of heating functions, based on the conventional sampling system, to ensure that the sample temperature is above 120°C during the sampling process, thus ensuring that no water condensed during the sampling process. Zhejiang Highpower Environmental Technology Co. Ltd.
Applicable: sample tests with high water content; long continuous online tests; tests of acid gas content (e.g. NO2, SO2);
3. Sample gas treatment systems:
1) soda separators: remove water from liquid form, mainly the handheld type using this dewater treatment system.
Application: Tests for acid-free gases (e.g. SO2, NO2); test tests for field monitoring by environmental authorities; test for boiler burning efficiency.
2) Electronic chillers: to reduce the sample temperature to 5 °C in an instant and remove the sample moisture in an instant, ensuring that the sample gas entering the test unit is of a standard temperature and low water content, so that the sensor can be tested accurately.
Applicable: Tests containing acid gases (e.g. SO2, NO2) in sample gases; Testing of gases containing moisture in the sample gas; Tests of higher temperature gas composition; (b) The devulcanization experiment at the Institute of Higher Studies; Long contact online testing; Pilot projects that must be tested with infrared sensors; Boiler burning experiments; Pilot projects related to the development and use of new energy sources. Zhejiang Highpower Environmental Technology Co. Ltd.
4. Automatic zero-point calibration:
Some flue gas analyzers have an automatic zero-point calibration function that is suitable for long-term online continuous testing by no one. This function ensures that the sensors do not drift during the testing process, thus ensuring that the test results are accurate.
Without this function, the instrument can only be manually calibrated and the instrument cannot be tested continuously for long periods of time.
5. Consider the sample characteristics of the test:
The characteristics of the gas are the temperature of the flue gas, the amount of water in the sample gas, the type of gas contained in the flue gas and its acidity, special gas conditions, etc.
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a If the concentration of sulfur dioxide is measured in a high-wet environment, the heating sampling system and the Palladium electron cooler must be selected in order to measure the results more accurately.
b Where gas species also have high concentrations of hydrogen, instruments of infrared sensors must be selected to test components of other gases, as high concentrations of hydrogen can be highly disruptive to electrochemical sensors.
6. Maintenance, place of origin and reputation:
Maintenance: is to see if there is a better maintenance service, which will guarantee the quality of the post-sale service.
Origin: The place of origin is important, mainly in terms of product quality and reliability. The best brand, of course, is the German brand. The second is the United States, the British brand; Zhejiang High Power Environmental Technology Ltd.