Infrared Burners Guide
Infrared Burners Guide
Red-Ray: Leading the industry with gas-fired infrared burners.
Designing a Combustion Air/Gas Preİ\Mix System For Redİ\Ray Infrared Process Burners
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Determine load requirements based on application (BTU/hr)
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Choose burner type based on process / application / requirements
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Determine number of burners required and configuration (number of burners per row based on oven and product constraints)
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Determine Ignition / Monitor Methods
- RPİ\I / RPİ\M for burners less than 4 ft
- IPQİ\1 / MPQİ\1 for burners greater than 4 ft
- UV Scanners
- IW (ignition wire) and MW (monitor wire) length (~25İ\50 ft per burner)
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Mixer selection (based on 1 mixer per 1 row of burners)
- Determine mixture pressure (based on burner type) and gas volume per row (1,000 BTU/hr = 1 CFH)
- Use the Pyronics Flomixer Data Sheet to select mixer (Manufactured Gas – 1000 BTU – 0.6 Sp Gr)
- Round up to higher capacity air insert size (1/32″)
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Pyronics Flomixer – highly recommend which includes
- Manual butterfly valve
- Air Sleeve and insert combined to create suction
- Gas Adjuster valve for air/gas ratio adjustment
- Zero gas regulator (BZR)
- Gas shutİ\off cock
- Flanged outlet
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Blower Selection (16 oz static pressure – LC Series 4121)
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Determine SCFHair required
- Total system load (BTU/hr) ÷ 1000 = SCFHgas
- CFHgas x 11 (11 to 1 air gas ratio) = SCFHair
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Use SCFHair to determine 16oz blower model from the Pyronics Blower 4121 Data Sheet.
- Specify blower model #, discharge position, motor HP, TEFC (total enclosed fan cover), voltage
- Select flexible sleeve with clamps (same size as blower outlet)
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Specify Air Filter
- Nonİ\washable Cylindrical Element
- Round Replaceable Element
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Determine SCFHair required
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Select Combustion Air Pressure Switch – (10″- 30″ w.c. range)
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Select Allİ\Inİ\One Gas Train Assembly
- Based on total CFHgas (to include all burners and pilots)
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Assembly to include
- Main shutİ\off ball valve
- Main pressure regulator
- Low and high gas pressure switches
- Visual and electronic position indication switches
- Double blocking valve
- Threaded body flange
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Select Main Gas Shutİ\Off Ball Valve (size based on plant gas line running to equipment)
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Select Yİ\Strainer (same size as main gas ball valve)
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Add (3) ¼” NPT dial (visual) pressure gauges 0İ\30″ WC with ¼” NPT ball valve (rated for gas)
- (1) use for combustion air header
- (2) use before/after Allİ\Inİ\One Train Assembly
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Control Panels – contact Redİ\Ray for design and pricing
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Automated burner control
- Temperature controller
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Motorized butterfly valve
- For system control – size based on main air header blower outlet
- For individual burner control – size based on mixer inlet
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Temperature measuring methods
- Thermocouple probe (used to measure ambient air)
- Optical pyrometer (used to measure product temperature)