The current search results do not provide specific methods for calculating the energy-saving effect of self-preheating burners. However, we can infer possible calculation methods by considering their energy-saving principles and characteristics, along with common energy-saving calculation approaches.

● Calculation based on air preheating temperature Self-preheating burners achieve energy savings by preheating the combustion air. Generally, a 100°C increase in air preheating temperature can save about 5% of fuel. Therefore, the energy-saving effect can be calculated based on the temperature changes before and after air preheating.

~ Calculation formula Energy-saving rate = (Temperature increase from air preheating ÷ 100) × 5% ≈ 35.

~ Example If the combustion air temperature before using the burner is ambient temperature 20°C, and after using the self-preheating burner, the combustion air temperature reaches 320°C, the temperature increase from air preheating is 320-20 = 300°C.

Then, the energy-saving rate = (300÷100) × 5% = 15%.

● Calculate based on the relationship between furnace temperature and preheated air temperature: At different furnace temperatures, self-preheating burners can preheat the combustion air to varying temperatures, resulting in different energy savings. Generally, when the furnace temperature is 1000°C, the preheated air can reach 350-400°C, saving over 15% of energy; when the furnace temperature is 1400°C, the preheated air can reach 600°C, saving 30% to 35% of energy.

 ~ Calculation steps:

① Determine the current actual temperature of the furnace.

② Look up the reference values for the preheated air temperature and energy savings corresponding to the furnace temperature.

③ If there is a difference between the actual preheated air temperature and the reference value, adjust the calculation based on the rule that increasing the preheated air temperature by 100°C can save about 5% of fuel.

● Calculate energy-saving effects through thermal efficiency calculations. The core of energy-saving in self-preheating burners is to enhance thermal efficiency and minimize heat loss from flue gas. The energy-saving effect can be assessed by comparing the thermal efficiency before and after the burner's use.

~ Calculation formula:

Energy-saving rate = (Thermal efficiency after using the burner-Thermal efficiency before using the burner) ÷ Thermal efficiency before using the burner × 100%.

Calculate thermal efficiency. Thermal efficiency can be calculated by measuring the input fuel heat, the heat effectively utilized, and the heat lost through flue gas.

The formula for thermal efficiency is: (heat effectively utilized) ÷ (input fuel heat) × 100%.

The heat lost through flue gas can be calculated by measuring parameters such as the temperature, flow rate, and composition of the flue gas, and using relevant thermophysical data. It is important to note that the above calculation method is based on the characteristics of self-preheating burners and common energy-saving principles.

In practical applications, adjustments and corrections may be necessary based on specific operating conditions and equipment features. To achieve more accurate energy-saving results, it is recommended to conduct long-term monitoring and statistical analysis during actual use.