| 摘要 |
PROBLEM TO BE SOLVED: To continuously operate tentative burning facilities and at the same time save fuel expenses for tentative burning and prevent a scroll chamber and a tentative burning oven body from becoming large by heating fuel using a particle raw material that becomes a high temperature while being preheated by a preheating device. SOLUTION: Since pulverized coal 37 injected from a burner 7 is heated to a high temperature in advance and is mixed with an oxygen-rich gas at a high temperature, even? a fire-resistant fuel can be burned in a scroll chamber 5 and a tentative burning oven body 1, thus preventing those that have not been burned from adhering to the inner wall of a cyclone 2 and a duct 6 of a preheating device and hence smoothly performing the continuous operation of tentative burning facilities. Also, the pulverized coal 37 is appropriately burned in the scroll chamber 5 and the tentative burning oven body 1, those that have not been burned are not burned in the cyclone 2 of the preheating device, the thermal loss of the facilities is small, and fuel efficiency is improved, Further, the need for increasing the volume of the scroll chamber 5 and the tentative burning oven body 1 is eliminated, thus reducing facility costs or the like. |
