Loss of speed and raw materials. The temperature of slag discharged from the lower part of the furnace of circulating fluidized bed boiler is between 850 ~ 950℃. If it is directly discharged into the slag removal system, it will endanger people's safety and is not conducive to the safe operation of the slag removal system and equipment. The function of slag cooler is to reduce the temperature of slag discharge to the temperature that slag discharge equipment can bear, and recover the physical sensible heat of slag discharge. The fluidized bed slag cooler can also send the fine particles in the slag back to the furnace to improve the combustion efficiency of the boiler and the utilization rate of limestone.
2.？ Is it necessary equipment? None of them can run, but the corresponding advantages of using slag cooler are gone.
3.？ What are the disadvantages of slag cooler? In addition, at present, most small and medium-sized circulating fluidized bed boilers use mechanical slag coolers such as water-cooled hinges and rollers, which are easy to block and block in operation. However, compared with mechanical slag cooler, fluidized bed slag cooler has strong cooling ability, fast slag cooling speed and is not easy to be blocked.
Attachment: Working schematic diagram (fluidized bed slag cooler)