Wr-4000nao denitrifying ammonia escape integrated on-line monitoring system (NH3, NO, O2) is based on the tunable semiconductor laser absorption spectra (TDLAS) and ultraviolet differential absorption spectra (DOAS). The system includes pretreatment, gas analysis module and data processing and display. The measured gas is dedusted by the high temperature sampling probe, transmitted by the heat pipe at high temperature, and entered the high temperature gas analysis module (TDLAS+DOAS technology) for analysis and measurement. The technical problems such as blocked flow path of ammonium salt crystallization at low temperature, low measurement accuracy caused by condensation water precipitation and NH3 dissolution are effectively solved, and high dust attenuation optical path of in-situ system makes it impossible to measure.
Measurement technology: tunable semiconductor laser absorption spectroscopy (TDLAS) + uv differential absorption spectroscopy (DOAS) + zirconia
NH3 0-10ppm ~ 1000ppm
NO O2 0 ~ 25%
Linear error: less than or equal to plus or minus 1%F.S.
Repeatability: less than or equal to 0.5%F.S.
Zero drift: less than or equal to 1%F.S./ half a year
Range drift: less than or equal to 1%F.S./ half a year
Response time: < 100s(T90)
Analog output: 4-way 4-20ma output
Analog input: 2-channel 4-20ma input
Digital communications: RS485/RS232/GPRS
Lower detection limit: 0.1 PPM (10m optical range)
Scavenging air source :(0.4 ~ 0.8)MPa nitrogen, purifying instrument air
The characteristics of
Single-line absorption technology can avoid background gas interference, low detection limit and small range drift
More than 220 ℃ heat tracing avoid ammonium salt crystallization and moisture absorption
Compact structure, easy to install. High degree of automation, small maintenance
Multi - parameter integration in the same system, simultaneous measurement, low cost
Applicable to the coal-fired power plant, aluminium plant, steel mills, smelting, glass factory, garbage power plant, cement plant, chemical plant and so on SCR or SNCR denitration device of ammonia escape emission monitoring and process control
Fax: 024-24121856 Technical support
telephone number: 24808757,24810226