| 1) Burner - Burns distillate, residual and gaseous fuels singularly or in a combination. A combination air blower provides the required air/fuel ration. High combustion efficiency is obtained by pressure atomization of light fuel oils and high pressure air from a separate compressor module for the heavy oils. An electric pre-heater heats the residual fuel oils for proper atomization. |
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| 2) Optional controls provide full modulation with low fire start and up to 10:1 turn down ratio. Burners meet IRI, FM or UL requirements. |
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| 3) Heat Transfer Surface - Schedule 40 pip of ASTM 53/106, grade B, seamless material is rolled into a helical coil and ASME code tested. The continuous pipe insures full flow through the entire coil. There are no stagnant areas to overheat and cause liquid decomposition. |
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4) Insulation - Ceramic Fiber is installed inside the steel plate
heater shell to limit the outside shell surface temperature. The
Ceramic Fiber is attached in place with stainless steel pins and
washers, and is put in place in layers. A rigidizer is sprayed on
the surface to protect against velocity of gases
passing to
the exit stack. |
| 5) Electrical Panel houses all operating and safety controls. This can be mounted either side of the heater, pending customer requirements. |
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| 6) Access Door - Allows access for maintenance inspection. |
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| 7) Observation Port - Allows operator to check flame pattern and fuel combustion conditions. |
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| 8) Separation/Surge Tank - Velocity of thermal liquid return from system is decreased to allow any steam or air in the system to escape into the expansion tank. This is particularly important during start-up of new systems. |
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| 9) Expansion Tank - As the system is brought up to operating temperature, heated thermal liquid expands into the expansion tank from the separation tank. Thermal liquids expands approximately 4% by volume per 100°F temperature increase. When the system is shut down and the liquid cools, liquid is withdrawn from the expansion tank to maintain a filled circulating loop. Can mount either side. |
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| 10) Circulating Pump - Either a centrifugal or a positive displacement pump is used to supply thermal liquid for the entire system. Pumps are selected to meet flow and pressure drop requirements of the system. Pumps are jacketed for water cooling when thermal liquid in the pump is above 350°F, when required. |
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| 11) Cold Seal Tank - The thermal liquid system is vented to the atmosphere through this tank to expel air and any steam during system start-up. A constant liquid level near the bottom of this tank acts as a barrier to minimize moisture entering the expansion tank when ambient air is pulled into the tank during system shut-down and cool period. |
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