Sulfur Recovery Unit (SRU) Monitoring
Optimal operation of Sulfur Recovery Unit (SRU), Sulfur Burner, and Thermal Oxidizer furnaces require accurate process Gas (Flame) measurement and accurate Refractory measurement for operational safety (high temperature alarms).
Of particular importance is control of the furnace process temperatures to prevent damage to the furnace refractory and assurance that reaction or destruction temperatures are reached and maintained.
Thermocouple measurement of acid processes either fail prematurely or are protected by multiple thermowells and sweep air systems that make thermal transmission to the actual thermocouple inaccurate or slow and only provides a refractory measurement not useful for process control.
Typical Single Channel Infrared Pyrometers do not compensate for changing flame transparencies and only provide one wavelength measurement. Clients must settle for either a Gas (Flame) or Refractory measurement or make multiple installations requiring multiple ports and hardware installations.
Changing flame transparency due to changing feeds is a common issue that affects typical infrared pyrometer Gas (Flame) and Refractory measurements. Combustion changes in the processes changes the Gas (Flame) transparency and affects the Gas and Refractory IR measurements. A clean burning flame becomes transparent to the IR Gas measurements. The transparency of the gases will cause the Gas IR Measurement to see the cooler refractory and include this into the gas measurement, which results in a lower than actual temperature measurement. The opposite happens for a dirty burning flame that will limit the refractory measurement from seeing through the dirty flame and components of the flame will influence to the refractory measurement, resulting in a higher than actual refractory measurement.
Since Flame Transparency varies with the process feeds to the furnaces, the transparency effect on the IR measurements is a variable factor used to correct measurements in these applications.
A single system installation with two independent IR filtered detectors that provides both Gas (Flame) and Refractory measurements simultaneously.
The innovative LumaSense Smart FMA™ Flame Measurement Algorithm allows for accurate realtime flame transparency compensation and correction. Applying flame transparency calculation with FMA removes the flame transparency errors to the Gas (Flame) temperature providing the highest accuracy in process temperatures.
Both Gas and Refractory measurements are critical to the furnace operations. The Gas (Flame) measurement is used by the operator to detect thermal events before IR energy is absorbed by the refractory, creating a refractory thermal event. This method of early warning by use of the Gas (Flame) temperatures, allows added time for operators to make process changes and reduce potential Refractory thermal events before they can become critical by triggering a high level alarm system based on the Refractory temperature measurements set point.
Key Products for this Application
E2T Petrochemical Pyrometers
Over 550 refineries, gas plants and petrochemical companies with over 1,700 installations worldwide have looked to us for accurate infrared temperature data. When you install E2T PULSAR 4 infrared thermometers, you are investing in proven experience, superior performance and ultimate cost savings.
Continuous and instantaneous measurement of both Refractory Temperature (RT), Gas Temperature (GT) in the vessel, away from the heat, vibration and corrosive gases.
- Rapid response time: Unexpected slug of hydrocarbon can be alarmed in 20 milliseconds, alerting the operator for response.
The simultaneous refractory temperature output provides a signal for your high-temperature shutdown/alarm systems and Gas (Flame) temperature provides the operator with a control and early warning of thermal events.
- The design of a system compatible with existing product installation hardware reduces the cost when upgrading current installed systems.
- Only one port is required for both maximum gas temperature and refractory temperature.