The dust removal characteristics and working mechanism of the current four major types of dust collectors were reviewed. It mainly focused on electrostatic precipitator technology, introduced its research status at home and abroad in recent years, analyzed the influence of many different factors (equipment structure parameters, gas characteristics, dust properties) on the efficiency of electrostatic precipitator equipment, and summarized electrostatic precipitator. The current technical shortcomings of the collector: The selection of the discharge electrode, the optimization of the best parameters, the anti?corrosion and cleaning of the dust collecting plate. In the future, the following issues should be focued on: development of discharge electrode materials suitable for new forms of electrostatic precipitators, discharge characteristics and dust removal efficiency in complex atmospheres, reduced insulation performance at the dust collector, and corrosion protection.

The query manner of the engineering curve in the engineering design data mainly looked up the relevant design handbook, a method based on Web was presented, which could get the data and parameters of the normal engineering curve to be digitally, and through the Web page, we could query to data in the electronic version of the engineering curve which was corresponding to the paper version.

Because of Most of the oil fields have come into the high water content exploitation period, and the water injection rate increased rapidly. So to improve and meliorate the efficiency of oil field surface water injection system has become one of the important tasks in the oil field water production process. It is necessary to study the distribution rules of oil and water's movement in the oil extraction process of oil deposit. Twodimensional numerical simulation to water injection of oil extraction was maole and the regularities of distribution of water and oil was analyzed in the flat surface boundary during the process of oil extraction. This result of the study shows that at the simulation of flat surface boundary from exploitation to flow field, the distribution of the shape of water stability in the oil deposit passed through round, irregular ellipse, and topped with three oil wells like an irregular patterning. Oil distribution of the shape in the oil deposit was the range of total simulation minus water. Although stress can improve the range of oil's flushing out, the effect would be reduced by times of pressure strengthen. There is a constant cabin altitude state which is similar to a triangle and topped with three oil wells in simulation range, and this field keeps the same after the whole simulation process is stable. 