Studies On The Technologies Of Jet Cleaning, Sludge Forming And Resourceful Treatment For The Industrial Oil Tank

The technologies of pulse jet cleaning, sludge forming and resourceful treatment for the industrial oil tank bottom sludge have been studied. A new pulse jet method of cleaning bottom sludge is first proposed. The unsteady cavitations model is set up and the self-excited pulse jet chamber is simulated. The mechanism of self-excited pulse action is discovered and the numerical optimize design theory of the self-excited nozzle therefore is promoted. The model experiment of self-excited nozzle has been conducted to verify the theories. Other experiments of the theories and the technologies have also been done for the proposal of settlement, separating and synthesized utilizing the industrial oil tank bottom sludge. The settlement model of the oil tank is set. A complete set of technology of the bottom oil sludge treatment is proposed.The introduction in Chapter 1 concludes the technologies of the treatment of bottom oil sludge. The latest development on it has been summarized. In Chapter 2, the numerical theory of steady cavitations has been set up by the studying of the two-fluid model of liquid and vapor. The control equations are put forward and the method of equations segregating, the mesh grid transformation and SIMPLE for two-phase fluid is promoted. The method of sharing pressure by mass fraction is discussed especially. In chapter 3, unsteady cavitations model is presented and improved also. The mechanism of the self-excited pulse is opened through the dividing the pressure zone, velocity and the volume fraction zone. In chapter 4, the effects of the nozzle construction and the operating parameters to the self excitation before the cavitations actions have been discussed. In chapter 5, the verification has been made by the experiment. In chapter 6, the settlement experiment of the oil tank has been done and the mechanism of layer settlement is promoted. In chapter 7, the steps of the oil sludge reuse, the content of each reuse step and the model of reduction of oil sludge have been deeply studies. The serially reusable direction by the main way of 'reduction of oil sludge within tanks, the fuelization of oilsludge from tank cleaning, and coking treatment technology' has been set. In chapter 8, the summarization of the dissertation is given and the suggestions of further researches are promoted.