Model of heat exchange in the stand of thermal neutralization of oil-containing waters

Abstract

The article continues the analysis of the results of the screening experiment on the stand of thermal neutralization of oil-containing waters. This time, the law of gas temperature distribution along the flue length in the steady state during its heating before the supply of oil-containing water is considered. It is established that at the heating stage, the gas temperature distribution along the flue length obeys the exponential law. When normalizing the temperature values relative to the readings of the first thermocouple along the gas flow and switching to dimensionless values, a reference temperature distribution is obtained that depends on only one parameter. This parameter characterizes the intensity of heat transfer from the gas in the flue to the environment. It is shown that it can be calculated by determining the heat transfer coefficients from the gas in the flue to its walls and from the walls to the environment, and then determining the heat transfer coefficient. On the other hand, this parameter is determined by approximating the experimental data with an exponential dependence. An example of its determination in Mathcad and Excel is given. The obtained research results will be in demand when modeling the temperature field in a flue when supplying oil-containing water for its neutralization.