In order to improve the thermal efficiency of diesel heaters, various analyses and studies need to be conducted during design. Through research and years of experience, it has been found that one of the following four methods or a combination of them can be used to achieve the goal of improving the thermal efficiency of the heater. Below, the editor will introduce methods to improve the efficiency of diesel heaters.
1. Increase the heat transfer area of the convection section. Increasing the heat transfer area can improve the thermal efficiency of the heater. Usually, the method of increasing the heat transfer area of FGS in the convection section is used to improve the thermal efficiency of diesel heaters.
2. Set up an air preheater. One of the most effective measures to improve the thermal efficiency of diesel heaters is to use air preheaters for heat recovery. In order to control this corrosion to a certain extent, a minimum limit should be set for the metal temperature in the low-temperature zone based on the amount of sulfur in the fuel.
3. Using waste heat boilers for heat recovery. The use of waste heat boilers utilizes the heat from the exhaust gas waste heat from diesel heaters to heat water or generate steam. Setting up this type of waste heat boiler will not change the fuel consumption of the hot oil furnace itself. The hot water or steam generated by the waste heat boiler can be used for production and heating, thereby indirectly saving fuel.
4. Reducing excess air rate: When designing a thermal oil furnace, the thermal efficiency of the heater can be improved by reducing the excess air rate. In order to reduce the excess air rate, an air inlet baffle is usually installed to regulate the combustion air. For oil or gas type hot oil furnaces, low excess air type burners can be used.
