A circulating fluidized bed device with multiple vertical tubes using the high suspension density fluid mixture of solid particles and gas

摘要

The present invention is an exhaust gas heat recovery president and the exhaust gas treatment apparatus for the recovery of waste heat from the high temperature exhaust gas containing a large amount of contaminants discharged from a combustion furnace such as the furnace, and also to remove the contaminants in the exhaust gas. Installing a perforated plate is arranged below the vertical heat conductive pipes, and a circulating fluidized bed of solid particles in the tubular automatically circulated in the heat transfer tubes arranged vertically. Feature of this device is the increased heat transfer due to the fluidization of the solid particles, heat transfer tube fouling reduction, reduction of the acid gas, and dust removal in the molten salt. And there is the case of the furnace, preventing re-formation of dioxins in a circular rapid gas cooling in the fluid bed inlet function.; Therefore, severe fouling of the heat exchanger is fluidized to a relatively large particle size solid particles in the heat transfer tube wall can enhance the cleaning function. In this case, the effect of the above-mentioned rest when relatively less.; In addition, the use of relatively fine particles, such as limestone, and when increasing the circulation rate, it is possible to obtain more heat transfer increasing effect in the molten salt removal efficiency of the acid gases and bunjinjung is increased. And the heat transfer tube array and the temperature of the exhaust gas of a mixture of the high-temperature exhaust gas and the low-temperature solid particles between the perforated plate of the furnace is rapidly cooled is possible to suppress the reformation of dioxins. And if using the activated carbon such as a fluidized medium, it is also possible to obtain cancellation of dioxins.