Finned tube radiator can be used for heating, air drying, refrigeration and so on. How to calculate its total heat removal area? Do you know? The net below is for us to analyze the calculation method of the total heat removal area of finned tube radiator.
During the operation of the drying equipment, warm air heats the raw materials, and the water in the raw materials volatilizes. During the whole drying process of the circulation system, because this kind of gas with higher temperature has reached or is close to saturation, at this time, the gas with high temperature and low temperature can not move the water in the raw materials, and the water in the raw materials will stop volatilizing because the humidity of the external environment has reached the saturation state, At this time, the high and low temperature of the gas on the raw materials dry again bad, need to be removed.
In general, if the moisture content of raw materials is relatively high, it is very easy to cause the external warm air saturation in a very short period of time. The fresh air system is used for drying, that is, after the gas is heated by the drying radiator, the warm air (130-180 ℃) is sent to the air dryer, and then discharged from the other side in the tunnel construction curing furnace, The inflow of warm air reverses the total flow of raw materials.
In general, if the moisture content of raw materials is relatively high, it is very easy to cause the external warm air saturation in a very short period of time. The fresh air system is used for drying, that is, after the gas is heated by the drying radiator, the warm air (130-180 ℃) is sent to the air dryer, and then discharged from the other side in the tunnel construction curing furnace, The inflow of warm air reverses the total flow of raw materials. During the operation of the drying equipment, warm air heats the raw materials, and the water in the raw materials volatilizes. During the whole drying process of the circulation system, because this kind of gas with higher temperature has reached or is close to saturation, at this time, the gas with high temperature and low temperature can not move the water in the raw materials, and the water in the raw materials will stop volatilizing because the humidity of the external environment has reached the saturation state, At this time, the high and low temperature of the gas on the raw materials dry again bad, need to be removed.
In general, if the moisture content of raw materials is relatively high, it is very easy to cause the external warm air saturation in a very short period of time. The fresh air system is used for drying, that is, after the gas is heated by the drying radiator, the warm air (130-180 ℃) is sent to the air dryer, and then discharged from the other side in the tunnel construction curing furnace, The inflow of warm air reverses the total flow of raw materials.
Another situation is the hot air circulation system is dry, because the moisture content of raw materials is not high, it is not easy to cause saturation of warm air in a short period of time, and dry must maintain a certain volatilization temperature standard, at this time, more choose to remove part of the cold and wet gas, fill part of the fresh air system, save resources and reduce product costs. The filling amount of fresh air system is generally 20-30%, which depends on the processing technology.
For example; For a tunnel construction type dryer, the inlet and outlet temperature of warm air is 160 ℃, and the inlet and outlet temperature is about 130 ℃ after the endothermic reaction of raw materials and water volatilization. The environmental quality channel is 20 ℃, and the filling capacity of fresh air system is 20%. Try to calculate the supply air temperature of drying radiator = 130x0.8 + 20x0.2 = 108 ℃
The total heat exchange capacity of the air drying radiator can be calculated according to the fresh air system, that is, the gas side channel temperature is 108 ℃, the specified inlet and outlet temperature is 160 ℃, and then the total heat exchange capacity can be calculated according to the total flow, relative density and constant pressure specific heat, and the multiple mean temperature difference can be calculated according to the fixed steam temperature.
