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BD
Heat Recovery Division, Inc.
SNCR (Selective Non Catalytic Reduction)
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9180 Oakhurst Road
Suite 4
Seminole
FLORIDA, 33776 |
TEL: 727_392_0492
FAX: 727_391_9289
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SNCR DENOX Technology |
- The SNCR is a proven technology to convert NOx into N2 and H2O. It is a selective Reaction in
the sense, that it does not react with the oxygen of the flue gas, but with the reagents itself.
- The reagents are typically NH3 (aqueous or gaseous) or Urea.
- The SNCR can achieve surprisingly high reduction rate, if the reagent is well mixed with
the flue gas.
- The SNCR is the most competitive NOx reducing retrofit technology compared to other solution
like Low-Nox burners or tail-end SCR.
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- The reagents needs to be injected in a ideal temperature range of 900-1050 °C.
- In order to avoid slipping and achieve high reduction rates, it must be ensure a very well
mixing of the reagent (for example NH3) with the flue gas.
- The mixing shall occur in a very short distance as the space is generally restricted.
- Any additional devices should have low pressure drop in order to minimize Fan
work and potential production shortage.
- The injection of NH3 can occur in the transition section, where the temperature is
high enough.
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SGM:
- The SGM relies on the physical phenomenon of vortex creation at a sharp edge of a plate.
- The counter flow rotating vortexes are working like a swirl.
- The exact dimensions of position in the duct is established in
a physical 3D model flow test.
- A high mixing ratio of NH3/NOx can be achieved within a very
short space.
- The ammonia slip is reduced to a minimum value.
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NH3 Feed control
- The ammonia can be injected in gaseous or in aqueous
form.
- In Ammonia plant, gaseous ammonia will be preferably
used.
- Simple injection technology can be used.
- A NOx monitoring system is required to control
the amount of NH3 to be injected.
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BD-Heat’s possible scope:
- 3D Modell flow test
- SGM Design
- Control loop design
- Supply SGM, injection lances
- Supply of control valves on a skid.
- Supply of NOx monitoring system
- Supervision of installation
- Commissioning
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BD-Heat’s exclusion:
- Installation work
- Cabling
- Programming work in DCS
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Advantages
- NOx Reduction with few components.
- Easy technology.
- Minimum ammonia slip, hence no risk of formation
of ammonium bisulfate on downwards components.
- No new space requirement.
- Short installation time (max. one week work).
- No operating costs.
- Mixing is visualized in physical model testing prior to
installation.
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BD Heat Recovery Division, Inc.
9180 Oakhurst Road
Suite 4
Seminole
FLORIDA, 33776
TEL: 727_392_0492
FAX: 727_391_9289
E-MAIL:
sales@bdheat.com
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