The Pre-Treatment Of Exhaust Pollution--The Development And Use Of Oxygen Fuel

Along with the development of world economy, energy and environmental protection become the focus that people pay attention to increasingly .The research of alternative fuel is more and more paid attention to by the countries all over the world.At first, this paper introduces in detail physical characteristics, exhaust features, merits and demerits and problems solved in use of substitute fuel of internal combustion engine, such as GNC, LPQ hydrogen, alcohol fuel, DME and DMC. And emphatically introduce methanol fuel (oxygen fuel). Next, the experiment is carried on N485Q DI diesel engine as an example. First of all, the performance parameters are measured under normal technology state of diesel engine. Then different proportion methanol fuel was carried on diesel engine and the performance was measured. And contrasted with the performance parametersunder normal technology state, these parameters can give us the influence laws of power, economic performance and smoke emission of diesel engine. And then following this using orthogonal regression rotation design method, the experiment of three adjusting parameters (M, rotation speed, load rate) is designed. The influence laws of power, oil consumption rate and smoke emission are researched under the circumstances of these three adjusting parameters (M, rotation speed, load rate) mutual matching. Thus mathematical models including power, oil consumption rate and smoke emission concerning three adjusting parameters have been established with statistical software SPSS, the effects on power, economic performance are descripted batchingly of the three adjusting parameters. Finally, with computer looking for the best parameters, the six regression equation at maximum torque and at maximum power are optimized. The best values of each performance index in theory and the corresponding values of adjusting parameters are concluded. Based on these parameters, the engine is adjusted again, and each practical performance index is measured by experiment, and contrasted with the theoretical values. Finally, the best adjusting parameters of different M have been determined by theoretical and experimental method.The research result shows that methane! fuel is beneficial to low the oil consumption rate and smoke emission obviously. When the diesel engine under heavy load and moderate load conditions, the effect is dramatically obvious. Because we don't change the structure of the diesel engine, the M value is not too large. And the limit is M20. The best parameters by computer looking for isapproximately M15, and the practice value is so. The experimental result is satisfactory as the errors of the outcomes found out by computer for the best value and the experiment outcomes are within 3 percent.