Acoustic Pyrometers for Sorbent Injection by SEI, Phone 775-358-0937

Applications

Sorbent Injection Control

Improved sorbent utilization and sorbent injection control can be achieved using our SP or MMP systems.

Actual graph of Energy Plant Performace Control using an SEI MMP Acoustic Pyrometer

Sorbent Injection Applications:

Wet or Dry Sorbent Injection Control
Wet or Dry Scrubber Control
Improve SO2 Reduction Efficiency
Improve NOx Reduction Efficiency
Ammonia Injection Control
Fuel or Trash Flow Control
Three-stage or Three-zone systems (reburning)
Burner optimization (excess air control, burner fine tuning)
Fuel biasing

The figure at the right shows actual performance improvements by using a SEI System in a waste to energy application. The first part of the graph, labeled "With SEI Control" was produced while the Acoustic Pyrometer controlled the trash flow into the furnace. This picture is from the report "Applications of Acoustic Gas Temperature Measuring Systems in Waste to Energy Plants". An actual similar graph using Ammonia Injection is in the document "The reduction of NOx and NH3 in waste-to-energy boilers using Acoustic Pyrometry". Both reports may be found on our literature page.

By continuously measuring the flue gas stream temperature using Acoustic Pyrometry, we can control the sorbent injection, and/or fuel flow. Possibly the best reason to employ continuous temperature measurements and temperature control is:

Temperatures over 1,250^o C can result in sintering of the surface of the sorbent, destroying the pore structure and reducing the active surface area, thus decreasing the sorbent’s efficiency.

Our technology is proven to provide continuous accurate temperature readings in the roughest, most abrasive and hottest conditions. Sound waves, and therefore our temperature measurements, are not affected by the material or dust in your process.

By using our MMP Mapping System, spatial mapping can insure the correct amount of sorbent needed is being applied. For a report on sorbent injection in the waste-to-energy industry, see The reduction of NOx and NH3 in waste-to-energy boilers using Acoustic Pyrometry (PDF download, 18 pages, 1.6 Mbytes, opens in a new window).

Sound waves can be used to measure the temperature of a gas, including air, using our Boilerwatch^®MMP Systems. Boilerwatch^®MMP Systems can also be used for multiple paths, contour maps, and temperature distribution mapping. The MMP comes with the TMS-2000 software mentioned above.

For gas temperature measurement the distance between the acoustic transmitter and receiver is fixed and easily measured, and the flight time is measured by the acoustic pyrometer. From this information, the average gas temperature across the path is computed. For the complete theory, see The Technology.

The acoustic pyrometer provides accurate, repeatable, real time, non-contact temperature measuring, and comes with the features below:

SEI Acoustic Pyrometer Features

Eliminate HVT or thermocouple replacement and maintenance time.
Non-Intrusive design: Stainless Steel Waveguides are outside the hood, eliminating wear.
Suitable for harsh, abrasive environments and all fuels.
Unaffected by dust.
Unaffected by air cannons.
The system’s lower range of 35^o F allows it to be used for cold or warm start-ups.
Upper temperature range of 3500^o F, or nearly 2000^o C.
Suitable for Consistently High Gas Temperatures and Startup.
Linear and Accurate.
Periodic calibration is not required.
Compared to replacing Thermocouples during outages, saves time when most needed.
Fault Tolerant Processor Control Unit (PCU).
The 4-20 mA temperature output is of the path, average, and difference, and easily connects to the Plant’s computer system.
RS-232 and RS-422 for local monitoring and statistics.
Telephone modem for remote monitoring.
An EEPROM stores all program settings.
Automatic recovery after power loss.
Remote enable/disable input
All Software operates on Windows 95/98/2000/XP or NT operating systems, and is included with each system.

Controlling some temperatures is essential for complete reactions and air quality. Let Acoustic Pyrometers give you reliable temperature data, and allow you to monitor and control your processes.

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