Molten Salt Heating Systemįor the temperature services higher than 360 0C, we can use molten salt heating system.

For heat supply to thermic fluid, we use furnace oil, natural gas, electric heater or coal. Below table can give you the details based on the temperature requirement. Based on the operating temperature requirement, we decide the types of thermic fluid. In case of heating requirements between 170 – 360 0C, we generally use thermic fluid system. And, for higher temperature heating requirements, it is better to use thermic fluid system from economy and safety point of view. Therefore, for heating up to 170 0C, steam is used in our industries (as required steam pressure is around 16 bar).

This will increase equipment cost and moreover possibility of hazardous will be too high. For this pressure, we require higher thickness of shell, tube-sheet, flanges, tubes, nozzles, piping, etc. Therefore, for higher process temperature say 230 0C, we need much higher pressure (i.e., around 50 bar pressure saturated steam). The require steam pressure is around 16 bar (as we need steam temperature between 190 – 200 0C). In case of steam, as heating temperature increases required operating pressure of the boiler and process equipment goes up.įor example, if we want to supply heat at 150 0C to a distillation column through reboiler. Boiler generates steam which we use to supply heat to reboilers, evaporators, heaters etc. Boilersīoilers are used in almost all process industries as a source of heating utility.

With these concerns in mind, you can select better option among various alternatives as mentioned above. Also, we can’t overlook other factors like safety parameters such as pressure build-up, flashpoint, flammability and toxicity. We need to look into the performance of the fluid and operating expenses. For selection, we take into consideration the design parameters such as temperature levels, heat transfer efficiency, pumping power and operational life. Adiabatic Flame Temperature CalculationĪs I mentioned above, in chemical industries we can supply heat to the process using steam from boilers, thermic fluid heater, molten salt system and fired heater mainly.

Fired heater design software