Regenerative Combustion Control Strategy Optimization Of A Shuttle Kiln

The sharp increase in energy use has led to energy shortages worldwide. Energy conservation has become a mandatory national and organizational survival. Due to the lack of a reasonably priced and effective energy-saving technology, a huge waste happens in China’s ceramic industry, mainly because of the lack of the exhausted gas utilization.The use of regenerative combustion technology(also known as high-temperature air combustion technology) in the traditional shuttle kilns is a feasible method theoretically. By using the combustion air to withdraw heat from the exhausted gas, lots of natural gas can be saved. However, there are few successful and public stories of reforming the ceramic shuttle kiln by using this technology around the world. In this paper, a design of the regenerative combustion shuttle kiln control strategy and following experiments provide research data for this field.On the basis of the combustion system design, combined with the operating data of the original shuttle kiln combustion system and fuzzy control theory, the gas flow control and air volume control rules were sorted out. The rules were modified by the following experiments. An unequal gradual reversing combined strategy was proposed to address the inhomogeneity volatility problem of the furnace temperature field and pressure field. And use simulation and experiment debugging methods to check the actual effect of the combination strategy. The results show that adopting the unequal gradual reversing combined strategy with five ejecting burners and three burning burners, the furnace temperature field becomes more uniform and the its pressure field fluctuates smaller. Meanwhile, the paper also studied the effect of different reversing start times and reversing times. Experiments show that choosing 650 ℃ as the reversing start time can guarantee success rate of ignition and flame stability. Reversing time 45 s is the best reversing time of this system. Preliminary results show using regenerative combustion technology in this case can save natural gas by 33.7%.