Combined with the basic theory of finite element and heat transfer theory, a mathematical model for the heat transfer problem of the furnace wall was established. In the normal operation of the coking furnace, it must be ensured that the furnace temperature fluctuates within the allowable range. The temperature of the furnace is measured by a thermocouple and monitored in real time, which can be considered as a constant temperature (527°C); the internal temperature of the furnace wall structure is difficult to measure directly due to the structure and other reasons. Therefore, here is mainly measured by the temperature value of the outer steel plate and compared with the theoretical value, the outer steel plate at the same height in the circumferential arrangement of four temperature measurement points, the use of infrared thermometer to measure the four test points are different The temperature of the moment. Comparing the experimental results with the theoretical analysis results, it is found that the average temperature of the outer side of the outer steel plate is 40.42°C, and the theoretical analysis result is 40.52°C. This shows that the mathematical model is accurate. In the actual construction process, the materials of each layer of the furnace wall cannot be completely adhered to each other, and there will be an air separator between them, and the thermal resistance of air is relatively large, so that the actually measured temperature value is slightly lower than the theoretical analysis result, resulting in an error. produce. According to the test results, the average temperature on the outer side of the outer steel sheet is 40.42°C, which will cause a lot of heat loss. At the same time, it also brings unsafe factors to the on-site construction. It can not meet the engineering requirements well, and the parameters of the furnace wall must be re-cooked. design. Due to the complex and huge equipment and expensive equipment, it is inevitable that a lot of manpower and material resources will be wasted by obtaining appropriate parameters of furnace wall structure through experiments. In the actual operation process of the furnace wall parameter design, the temperature of the outer steel plate of the coking furnace fluctuates within a certain range with the change of the room temperature. Considering the factors such as the engineering cost of the furnace wall, heat loss, on-site construction and other factors, the company requires outer steel plates. The temperature does not exceed 30°C. Taking into account the actual wall structure in the construction process there will be air diaphragm, the thermal resistance is relatively large, resulting in the actual situation, the outermost steel plate temperature will be slightly lower than the theoretical results and finite element simulation results. Therefore, the initial T4=30°C is sufficient. Substituting equation (8) yields T3 = 30.11°C. When the total thickness of the furnace wall is constant, the distribution of the temperature field is not the same when the refractory materials and the thermal insulation materials are combined in different proportions because of the different thermal conductivity properties of the refractory materials and the thermal insulation materials. On the premise of ensuring that the temperature of the outermost steel plate does not exceed 30°C, the structural parameters of the fire-retardant layer and the thermal insulation layer when the total thickness of the different furnace walls are calculated by the mathematical model of the furnace wall. Residential Sectional Garage Door
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