What is the function of feng shui combined slag cooler?

Since the circulating fluidized bed boiler was put into operation in China, the wind-water combined slag cooler has been one of the three major problems of fluidized bed boilers, which often leads to poor slag discharge, slag blockage and even forced shutdown. Most units have dismantled the feng shui combined slag cooler at all costs and replaced it with a drum slag cooler. Some experts have come to the conclusion that the feng shui combined slag cooler does not conform to China's national conditions and its structure is unreasonable. After careful analysis and innovative experiments, the operators of our factory successfully used the feng shui combined slag cooler, which brought good benefits to the enterprise. The slag cooler is divided into three rooms (that is, room 1, room 2 and room 3). One room is an empty room, and the space in Room 2 and Room 3 is a cooling water pipe bundle (steam turbine condensate). The height of the wear-resistant brick partition wall between Room 2 and Room 3 is 1200mm. There are two 300ⅹ300mm square holes at the bottom of the partition wall from the air distribution plate. The side wall of the first room is provided with an emergency slag discharge port, the normal slag discharge port is located below the air distribution plate of the second room (at the partition wall), and the normal slag discharge port is located in the center of the air distribution plate of the third room. The discharge of coarse and fine slag is controlled by electric gate valve. Hot slag enters from the top of the first chamber of the slag cooler, first falls into the first chamber to obtain air cooling, and then enters the second chamber to obtain air cooling and water cooling under the action of fluidized air in the first chamber. The slag in the second chamber is coarse slag, and the fine slag enters the third chamber through the partition wall. The main reason of slagging in the furnace is that when the sulfur content of low ash melting point coal is high, high fluidity oxides interact with alkali metal compounds (sodium, potassium, etc.). ) viscous pyrosulfate and complex basic ferric sulfate are formed in the furnace, which can form a molten mixture with low melting point at the bottom of the furnace. When the conical valve is closed, the molten mixture near the conical head can be rapidly cooled due to the low temperature of the conical head.