Ammonia is a gas that easily dissolves into water, there are several common detection methods, but ammonia is toxic and corrosive, the current measurement mainly uses the TDLAS direct measurement method. TDLAS is essentially a spectral absorption analysis technology, which uses the selective absorption characteristics of gas molecules for specific wavelength lasers, and analyze the changes in the intensity of laser absorption to obtain the gas concentration. TDLAS spectroscopic absorption method can directly measure the concentration of ammonia gas, and can realize accurate measurement from % to ppb.
☑ ESE-LASER-100 Ammonia (NH3) Gas Analysis System
☑ ESE-LASER-100P Portable Ammonia (NH3) Gas Analyzer
☑ ESE-LASER-500 Trace Ammonia(NH3)Gas Analyzer
☑ ESE-LASER-10M Ammonia(NH3) Gas OEM Module
| Measured Gas | Ammonia(NH3) |
|---|---|
| Method | Tunable Diode Laser Spectrometry (TDLAS) |
| Range | NH3:10ppm/1000ppm/40% |
| Accuracy | ± 1% full scale reading depending on integration stability (temperature & pressure) |
| Precision | ±2%FS |
| Displayed resolution | 0.1ppm/0.01% |
| Response time | Less than 15S (at gas flow rate of 3 L/min) |
| Sampling Gas Temperature | ≥180℃ |
| Analog Output | 4~20mA DC, Insulating output, maximum load is 900 ohm, |
| Digital Output | RS232/485 |
| Power Supply | 90-240VAC / 50/60Hz 120W |
| Warm up time | 30 minutes |
| Interface | RS232 |
| Ambient Temperature | Temp: -10-50℃ Humidity: 0-90%RH |
Application in environmental protection In metallurgy, coking, electric power, cement and other industries that use biomass as fuel, the process of removing nitrogen oxides from combustion flue gas and the importance of preventing environmental pollution have been acutely recognized as a worldwide problem brought it up . To remove nitrogen oxides (denitrification), the world’s more mainstream processes are divided into: SCR and SNCR. To run SCR and SNCR, the required medicines are ammonia and urea (the main reason for using urea is because it is kept for storage, and when used, urea is still cracked into ammonia for use). When monitoring the working efficiency of SCR and SNCR, the ammonia gas online analysis system must be used to control the consumption of ammonia water through the ammonia gas analysis system.
Denitrification process ammonia escape NH3 detection Flue gas denitrification refers to the reduction of generated NOX to N2, thereby removing NOX in flue gas. The more mainstream processes in the world are divided into: SCR denitrification and SNCR denitrification. SCR denitrification technology is a selective catalytic reduction method. In the presence of a catalyst (SNCR denitrification technology is a selective non-catalytic reduction method, in the absence of a catalyst and high temperature), ammonia gas decomposed from liquid ammonia or urea is used as Reducing agent, reducing nitrogen oxides in flue gas to nitrogen and water. Ammonia slip caused by the remaining reducing agent is inevitable in the reduction process. Escaped ammonia easily forms ammonium bisulfate with SO3 in the flue gas, such as ammonium bisulfate, which is highly adhesive, corrosive, and tar-like solids, causing corrosion, blockage, and dust accumulation in the air preheater, affecting the dust removal effect of downstream dust removal equipment and even causing damage; at the same time It means that the consumption of liquid ammonia/urea increases, which reduces the economic efficiency of the denitrification device; and the remaining ammonia gas will be discharged into the atmosphere to cause secondary pollution of the atmosphere.
Therefore, the detection of escaped ammonia in the denitrification process is very important for optimizing the control of ammonia injection and reducing pollutant emissions.
Here are some key advantages of using an ammonia TDLAS gas analyzer:
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