Industrial furnace equipment development

       Industrial furnace manufacturers tell you the necessity of pulse combustion in the industrial furnace industry:

       Industrial products have higher requirements for the uniformity of the temperature field in the furnace, and higher requirements for the stability and controllability of the combustion atmosphere, which cannot be achieved using traditional continuous combustion control. With the emergence of industrial furnaces with wide section and large capacity, pulse combustion control technology must be used to control the uniformity of the temperature field in the furnace.

       Advantages of pulse combustion control

       Pulse combustion control adopts an intermittent combustion method. It uses pulse width modulation technology to achieve temperature control of the furnace by adjusting the duty cycle (on-off ratio) of the combustion time. The fuel flow rate can be pre-set by pressure adjustment. Once the burner is working, it will be at full load, ensuring that the gas outlet speed remains unchanged when the burner is burning. When the temperature needs to be raised, the burner burning time is lengthened and the interruption time is reduced; when the temperature needs to be lowered, the burner burning time is reduced and the interruption time is lengthened. The main advantages of pulse combustion control are high heat transfer efficiency and greatly reduce energy consumption. It can improve the uniformity of the temperature field in the furnace. There is no need for online adjustment to achieve precise control of the combustion atmosphere. The load regulation ratio of the burner can be improved. The system is simple and reliable, and the cost is low. Reduce the production of NOx. The adjustment ratio of the ordinary burner is generally about 1:4. When the burner is working at full load, the gas flow rate, flame shape, and thermal efficiency can reach a better state, but when the burner flow rate is close to its smaller flow rate, the heat load If it is smaller, the gas flow rate will be greatly reduced, the flame shape will not meet the requirements, and the thermal efficiency will drop sharply. When the high-speed burner works below 50% of the full load flow, the above-mentioned indicators are far from the design requirements.

         Pulse combustion is not the case. No matter what the situation, the burner has only two working states, one is full-load working and the other is not working. The temperature is only adjusted by adjusting the time ratio of the two states, so pulse is used. Combustion can make up for the defect of low burner adjustment ratio, and it can still ensure that the burner works in a better combustion state when low temperature control is required. When using a high-speed burner, the gas jets out at a fast speed, which creates a negative pressure around it. A large amount of flue gas in the kiln is sucked into the main gas for sufficient mixing and mixing, which prolongs the stagnation time of the flue gas in the kiln and increases The contact time between the flue gas and the product improves the convection heat transfer efficiency. In addition, the flue gas and the gas in the kiln are fully stirred and mixed to make the gas temperature close to the flue gas temperature in the kiln, improve the uniformity of the temperature field in the kiln, and reduce high-temperature gas Direct thermal shock to the heated body.

        The above content is compiled and released by the Suzhou electric furnace manufacturer for you. If you have any related questions, you can contact us for consultation.