{"id":2785,"date":"2020-07-28T03:43:00","date_gmt":"2020-07-28T01:43:00","guid":{"rendered":"https:\/\/staging.blogs.yokogawa.de\/chemical-pharma\/uncategorized\/tdls-8000-8100-optimum-solutions-for-optimum-combustion\/"},"modified":"2022-06-17T09:28:49","modified_gmt":"2022-06-17T07:28:49","slug":"tdls-8000-8100-optimum-solutions-for-optimum-combustion","status":"publish","type":"post","link":"https:\/\/www.yokogawa.com\/eu\/blog\/chemical-pharma\/en\/tdls-8000-8100-optimum-solutions-for-optimum-combustion\/","title":{"rendered":"TDLS 8000\/8100 – Optimum solutions for optimum combustion"},"content":{"rendered":"

Conflicting aims in the combustion process<\/strong><\/h2>\n

In the combustion process, carbon dioxide and water are generated from the combustion gas (hydrocarbons) and oxygen (from the air). Even if there is excess oxygen, traces of carbon monoxide (CO) are still generated in the combustion process. CO is an environmental pollutant and its emission into the atmosphere is regulated by the Federal Immission Control Act.<\/p>\n

The assumption that a great deal of oxygen is very helpful is true in relation to CO. But it is wrong in relation to efficiency. This is because it is not efficient to heat up air that you don\u2019t need. And as the emissivity of oxygen and nitrogen (i.e. the air) is worse than that of carbon dioxide and water (the combustion products), this reduces efficiency even further.<\/p>\n

\"TDLS
\nIn addition, incomplete combustion in the furnace can cause coking or damage due to afterburning of CO in the area of the heat exchangers. Unburnt gas, such as when a nozzle does not ignite, can even become highly dangerous.\u00a0<\/strong><\/p>\n

What is the ideal strategy for controlling the combustion process and ensuring it is safe? <\/strong><\/h3>\n

This is easy to conclude from the above:<\/p>\n

    \n
  • Generate as little CO as possible (adequate O2 <\/sub>present)<\/li>\n
  • Reduce O2<\/sub> as far as possible within these parameters<\/li>\n<\/ul>\n

    For safety<\/p>\n

      \n
    • Monitor the combustion gas (methane) using measurement technology<\/li>\n<\/ul>\n

      And this is where TDLS comes into play!<\/p>\n

      The ideal method<\/strong><\/h3>\n
      \"\"
      Cross-stack laser in the combustion process<\/figcaption><\/figure>\n

      Two TDLS8000<\/a> cross-stack lasers with the following benefits:<\/p>\n

        \n
      • All three key parameters are measured: O2<\/sub>, CO and CH4 <\/sub><\/li>\n
      • Representative measurement; not a point measurement as with other methods, but an integrated measurement across the entire cross-section of the combustion chamber. Up to 30\u00a0m if necessary, because the combustion chamber is not homogeneous<\/li>\n
      • Measurement taken right over the flames at up to 1500\u00b0C, where the reaction takes place, and closely spaced. No influence from afterburning of CO or from infiltrated air.<\/li>\n
      • Selective measurement, no interference, e.g. due to CO (zirconia) or water (NIR)<\/li>\n
      • A reference gas cell enables reliable<\/u> detection of CO (and O2<\/sub>) at low concentrations (as they occur when used in the combustion chamber) \u2013 line locking!<\/li>\n
      • In-situ \u2013 but not in contact with media \u2013 no taking or preparing samples<\/li>\n
      • Correspondingly fast: one reading approximately every twelve seconds<\/li>\n
      • TruePeak evaluation \u2013 so no influence from background gases<\/li>\n
      • Thanks to AutoGain, reliable measurement down to well below 10% transmission, e.g. caused by dust and soot<\/li>\n
      • No calibration required, measurement can be checked with inline validation<\/li>\n
      • Safe: optical measurement in ATEX Zone 0 when used in ATEX Zone 1 or Zone 2 environment<\/li>\n
      • SIL2 and genuine SIL3 (SIL3 certified software) for genuine redundancy<\/li>\n
      • Designed for rugged environments<\/li>\n
      • Uncomplicated operation: no calibration, no wearing parts, extremely low-maintenance<\/li>\n<\/ul>\n

        Too complex for the small and stable furnace?<\/p>\n

        The economical alternative<\/strong><\/h3>\n

         <\/p>\n

        \"\"
        Lance laser in the combustion process<\/figcaption><\/figure>\n

        One or two TDLS8100\u00a0probe-type lasers<\/a><\/p>\n

          \n
        • With the exception of the measurement location, all the benefits<\/u> of TDLS technology, process temperature up to 600\u00b0C<\/li>\n
        • Integrated measurement through the optical path length in the probe \u2013 no point measurement<\/li>\n
        • And hopefully the probe-type lasers will fit precisely on the flanges of the previous devices or a sampling probe for a previous extraction device. It doesn\u2019t get more economical than that.<\/li>\n<\/ul>\n
          \"\"
          Lance laser as replacement for single-point measurement<\/figcaption><\/figure>\n

          Before I forget: TDLS8000 and TDLS8100 are from Yokogawa<\/a>!<\/p>\n

          More details can be found in the Process webinar<\/strong><\/a><\/p>\n

           <\/p>\n

          \n

          M+C sensors, M+O sensors and process analytics<\/a><\/p><\/blockquote>\n