CLAUS THERMAL REACTOR TEMPERATURE SENSOR

Model HIR Uses Infrared Technology

Download the Model HIR Detailed Datasheet 
Note: You will need the Acrobat Reader to view the data sheet. 

Features

• Operates accuratly and reliably with up to 100%
  oxygen enrichment.
• Measures refractory hot face temperature
• Works in conjunction with Model HTP thermocouple
• Check its calibration against the thermocouple
  temperature monitoring system; anytime, without the costs and hazards of opening the reactor
• Very low maintenance
• Stable electronics, no periodic factory re-calibration required; no “spare” needed
• Sulfur does not coat the sighting window
• Nozzle clean-out “rodding” is eleminated
  “Nozzle Blaster” removes sulfur and debris deposits
• Insensitive to reaction gas infrared radiation absorption and flame luminosity
• No cooling or supply power required
• Accurate; 400°C to 1700°C range

Operation and Technology

A Claus sulfur recovery thermal reactor partially oxidizes hydrogen sulfide to sulfur dioxide as one of the steps in removing unwanted sulfur from process streams. The final reaction products are elemental sulfur and water. The internal temperature of the reactor must be high enough to carry the reactions forward efficiently, yet not high enough to damage the refractory lining. Enrichment with oxygen adds the potential to achieve very high temperatures, which can result in destruction of the refractory or even of the complete shell. The HIR can help keep this from occuring.

All materials radiate energy as a function of their absolute temperature. The Model HIR “looks” into the sulfur reaction furnace and senses the amount and spectrum of the infrared energy being emitted by the refractory hot face. The sensed energy is converted into a signal, which is used to accurately display the refractory operating temperature. The infrared energy being sensed must pass through the reacting gases without being absorbed by them. The Model HIR must also “look” through those same gases without seeing them or sensing their high temperatures. This feat is accomplished with notch optical filters and special sensors. The selected sensing spectrums avoid significant errors due to luminosity and absorption.

The Model HIR is nearly maintenance free. The lens, sighting window, and nozzle are kept at a high temperature to avoid sulfur buildup and the need to perform frequent periodic maintenance. It uses stable electronics, which do not require cooling or frequent re-calibrations at the factory.

Specifications

• Range: 300ºC to 1700ºC (600ºF to 3100ºF) , Other ranges available
• Accuracy: ±11ºC (20°F)
• Readout: High: Contrast LCD Display;
• Output Signal: 4-20 mADC, 2 wire loop
• Loop Rating: Intrinsically Safe when used with approved safety barriers
• Power Required: Powered by the 24 VDC loop
• Fiberoptic Cable: Flexible Viton over SS armor;
  3M (10') Is the standard length
• Hot Lens Mounting: On a flanged nozzle; steam jacketed
  3” ANSI is standard, 2" ANSI and other types and sizes available
• Nozzle Blaster: 1” NPT port for using steam to blow
  debris out of the process nozzle
• Housing: Explosion Proof, Class 1, Div 1, Grps BCD; 4X.
  CSA,NRTL/C Listed
• Housing Mounting: On a vertical surface or a 2” pipe
  stand with vertical or horizontal orientation
• Ambient Temperature Limits:
  FiberOptics, Lens: -30°C to +200°C (-20°F to 400°F)
  Electronics: -15°C to +65°C (0°F to 160°F)
  

Third Party Listing

• CSA (Canada) NRTL/C (USA)
• Explosion Proof
• Environment Proof

Monitoring System Schematic

Installation Tools   These tools will allow for the creation of a centered, accurate hole through the refractory liner to provide a clear optical path for the infrared energy.
Model H2G /H3G Refractory Drilling System		The Delta Controls Model H2G/H3G is used to drill straight, centered holes through Claus thermal reactor refractory linings. Hand-held positioning of a core drill bit during drilling is unacceptable and will not produce a properly aligned hole. The diamond matrix core drilling bit is equipped with sleeve bearings that use the inside surface of the nozzle to guide the drill on the centerline of the nozzle.
Model HRS Refractory Stop		The Model HRS Refractory Stop is used to prevent refractory castable or mortar from entering the mounting nozzle during lining of the sulfur reaction furnace. After the refractory has cured, the HRM is removed and the refractory is drilled using the HRG drilling system.
Model HRM Refractory Mandrel		The Model HRM refractory mandrel is installed on the thermocouple nozzle prior to installation of the refractory material. It creates a centered, accurate hole through the refractory liner, and keeps refractory and mortar out of the nozzle interior. This is required so that the refractory protective well will be correctly located in relation to the mounting flange. The HRM is used to create the refractory hole when drilling is undesirable, such as when water (for drilling) may not be used. Many refractory installers prefer to use the H2G/H3G drilling system rather than mounting the HRM, which requires cutting and fitting firebrick around the mandrel pipe.

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