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  Home > Control & Measurments > Process Control (플랜트용 온라인 분석시스템)
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  플랜트용 온라인 분석기기 (PROCESS ANALYSER) 

 

 

 

 

 

 

 

암모니아 분석기

ASA-400 : AMMONIA ANALYZER  (AMMONIA SLIP & NOX ANALYZER)

 

 

 

For the DeNOx process control

The flue gas stream contains ammonia, nitrogen oxides and in some cases sulfur dioxide 1. These components all absorb UV radiation, and therefore can be monitored by process analyzers that utilize UV absorbance techniques for detection such the ASA-400 ( incorporating a process diode array UV VIS spectrophotometer).

 

Accuracy levels:

 

NH3 ±1ppm, NO ±1ppm, NO2 ± 1ppm

 

The full spectrum analysis advantage:

The following figures  show the absorbance spectra of: ammonia, nitrogen oxide, nitrogen dioxide and a mixture of all three in a process stream, one can immediately see that the absorbance features strongly overlap. A full high resolution spectral analysis is, therefore, essential. High accuracy at a relatively wide dynamic range is achieved  due to the sharp absorbance features of the components measured by the high resolution process spectrophotometer.

                                                                                 

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Sample probe to withdraw a representative sample from the stack:

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ASA-400 Specifications

Use / Application

Measurement of minute quantities of ammonia gas NH3 (slip stream), nitric oxide (NO), nitrogen dioxide (NO2) and sulfur dioxide (SO2).

Process

DeNOx Catalytic and non catalytic removal of nitrogen oxides(SCR, SNCR).

Industry

Power generating plants

Measurement mode

Continuous on-line

Measurement range

NH3 0-20ppm (± 1ppm) , SO2 0-2000ppm (± 3% of measurement) NO , NO2 0-600ppm (± 1% of measurement)

Measurement principle

Diode array UV industrial spectrophotometer

Probe:

Hastalloy - cross stack averaging (up to 8 meters long

Sample line

5 meters long (280°C) Hastalloy (other lengths - optional)

Output:

RS-232 four 4-20mA galvanically isolated outputs.

Ambient temperature:

-20 to 55 °C

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