Study On Structure And Thermal Parameters Of Vertical Tank For Recovering Sinter Waste Heat

Reference for CDQ, vertical tank for recycling was put forward with independent intellectual property rights of the recovering sinter waste heat process system of efficiency. One of the core unit equipment-vertical tank for heat recovery is the key equipment that makes sinter sensible heat is converted to heat carrier that is cooling air sensible heat. According to the relationship between the three types of variables shows that the vertical tank inlet parameters, namely the quality and quantity of sinter sensible heat, affects the vertical structure and operating parameters, thereby affecting the export parameters, namely the quality and quantity of the heat carrier, which affects the subsequent waste heat power generation. Based on this, this paper carried out for vertical structure, structure parameters and operating parameters of the preliminary discussion, for subsequent tank recovery technology research and engineering design to lay a good bedding.The structure of the vertical was studied and determined by imitating the structure and process of CDQ and referring to the structural form of blast furnace. The structure parameters and operating parameters of vertical tank was studied by drawing lessons from the non-fluidized bed gas-solid flow and heat transfer theory and using the analytical methods. And the vertical structure parameters and operating parameters for recovering sinter waste heat matched with 360 m2 was preliminarily determined.The main results are as follows.(1) By drawing from dry quenching fumace of CDQ and blast furnace structure and the site investigation, combining with the characteristics of vertical tank process, the overall structure of the vertical tank for recycling sinter waster heat. These key components like vertical tank body, sinter distribution device, air distribution device and discharge device are designed, Based on this, using PROE and CAD software to draw the assembly diagram and key parts diagram.(2) Influence of the gas-solid heat transfer effect of the vertical tank thermal parameter mainly includes the cooling air flow, height of cooling section, section size of the cooling section, cooling air inlet temperature. In the future may adjust range, influence law as follows:1) Increase the height of the cooling section, cooling air outlet temperature is increased, and the sinter outlet temperature is decreased. The outlet cooling air carried by the exergy is increased, but sinter bed resistance loss is significantly increased.2) Increases the tank diameter, cooling air outlet temperature and outlet temperature of the sinter are lower. The exergy peak of different tank diameter is corresponded to the different apparent velocity of cooling air, the larger the diameter, the smaller the corresponding apparent velocity.3) Increases the inlet temperature of cooling air, cooling air outlet temperature and outlet temperature of the sinter is increased, and in the same apparent velocity of cooling air, the outlet cooling air carried by the exergy is increased.4) To ensure that the exit of cooling air carried by exergy having a larger value, comprehensive above the curve of the apparent velocity of cooling air, in the range of 1.9 to 4 m/s.(3) For a 360m2sintering machine can be equipped with a vertical tank, suitable thermal parameters are:the height of cooling section is 3.7 m, cooling section diameter of tank is 9.6 m, the inlet temperature of cooling air is 60?, the apparent velocity of cooling air is 2.4 m/s, and the cooling air flow is 625,400 m3/h. It can also be equipped with two vertical tanks, suitable thermal parameters are:the height of cooling section is 3.7 m, cooling section diameter of tank is 7.6 m, the inlet temperature of cooling air is 70?, the apparent velocity of cooling air is 1.9 m/s, and the cooling air flow is 310,300 m3/h.