잔류가스 분석기 (SAN305)

TLG-837 : IN-SITU TAIL GAS ANALYZER

When applied to a Claus process the TLG-837, an analyzer incorporating a diode array industrial spectrophotometer, measures the complete spectrum of the process gas stream instantaneously and continuously. In contrast to a filter based instrument , measuring at a few discrete wide band wavelength, the diode array spectrometer processes the absorbance signals obtained from the complete spectrum by a multi-component method. Accurate measurements of hydrogen sulfide, sulfur dioxide, COS and CS₂ concentrations are readily achieved with the TLG-837. The measurements of all the components are more accurate and reliable allowing for a higher quality and a more reliable control signal .

The Claus sulfur recovery process  is commonly utilized to remove  sulfur compounds from fossil fuels. In the older systems a demister was required  to eliminate the sulfur vapor before a measurement was taken.

Why did the old units require a demister ? mostly due to the fact that these units were utilizing a filter based spectrophotometer for detection. If one looks at the absorbance spectra of all the components that need to be monitored in a tail gas application it can readily be seen that they have overlapping absorbance features.

Filter Vs. Diode array based spectrometers: A filter based spectrometer uses several wavelengths  to measure the H2S and SO2, and assumes that the COS and CS2 contributions are negligible. But are still left with the sulfur vapor that also absorbs at that range, now if in addition to the H2S and SO2 the sulfur is also present it will bring the total absorbance to values larger then 1 AU . Due to the limited dynamic range of the filter based units the absorbance needs to be lower then 1AU . A demister to lower the amount of sulfur vapor was therefore incorporated as an integrated part of all tail gas analyzers. After talking to many users we concluded that an in situ probe has long been anticipated.

So why can we do it?  mainly because we use   diode array detectors measuring a complete spectrum from 190nm to 1100nm with 1nm resolution which can easily measure up to 2AU +/- 0.0002AU. Now we have a full spectrum analysis and we can measure high absorbencies so why not just leave the sulfur vapor in the stream and treat it as another component in the stream?

In addition: the TLG-837  uses fiber optics to bring the light to and from the flow cell, hence, allowing for the electronics to be physically separated from the probe. It is a simple design and requires very low maintenance benefiting from the availability of the state of the art detectors and fast computers for instantaneous data analysis.

 

Advantages:

• In situ detection
• No Demister
• Simultaneous monitoring of H₂S, SO₂, COS, CS₂ and sulfur vapor.
• Diode array detection eliminates mechanical scanning system which require alignment and adjustment procedures.
• No sample line heat tracing and clogging problems.
• No Housing required   

 

Specifications:

 

분광광도계, 분광계, 화학플랜트, 제약, 제지, 석유, 황화수소분석기, 잔류가스분석기, 스펙트로포토메타, 염소분석기, 자외선, 가시광선, 근적외선, 다이오드 어레이, 암모니아분석기, 벤젠분석기, 나프탈렌분석기, 방향족 분석기, 염기산화물분석기, 금속이온분석기, 바나듐분석기, 구리이온분석기, 수소분석기, 황산화물분석기, 색상분석기, 톨루엔분석기, 코발트분석기, CIP분석기, MEG분석기, 페놀분석기, 광화이버 스펙트로메타, 샘플링시스템, 벤젠, 자일렌, 발전소, 소각로, Applied Analytics, Process analyzers, On-line composition monitors, Process stream, Gas, liquid,  Hydrogen sulfide analyzer, Tail gas analyzer for the Claus sulfur recovery process, UV / VIS / NIR Diode array spectrophotometer, Chlorine analyzer, Ammonia analyzer, Aromatics analyzer, chlorine dioxide analyzer, Metal ions analyzer, MEG analyzer,  TiCl4 , vanadium analyzer, CIP analyzer, Copper ions analyzer, Hydrogen analyzer, Sulfur dioxide analyzer, TBC analyzer, Color analyzer, Fiber optic spectrometers, Sampling systems, Cl2, BTX, Benzene, Toluene, Xylene, MEHQ, NH3, Multi Components, Concentration monitoring, On-line, Continuous measurements, Cobalt recovery, Sulfur recovery, Air demand, Ammonia slip, power plant, SO2, COS, CS2, Sulfur, H2S, NCl3, ClO2, O3