Abstract
This system is the plate filter system controlled by PLC which composed by programmable controller PLC, the dirt fuel tank, the dirt oil pump, the stirs electrical machinery, the filter box, the opening and closing box electrical machinery, the filter paper and transports paper electrical machinery, and so on. It realize the function of change the dirty oil into clear oil. The dirty oil smears the oil pump to pull out after the dirt fuel tank, enters the filter box, stirs by the electrical machinery。It needs sometimes to carry on pre-depositions when filters just started. Because the diatomaceous filters on the cake didn’t spread well yet when filters just started, which needed sent the diatomaceous and the dirty oil in together by the pipeline when filter just starts, at this time the impurity inside the dirty oil doesn’t filtered out completely after the filtration, therefore could not treat as the clear oil output.
When there are excessively impurity deposits on the filter paper, the internal pressure of the box increases suddenly, must open the box to trades the paper, the filter paper replaced by the paper electrical machinery. As a result of requests debugging and test run, the system divides into automatic and the manual two working style. Because the manual style is more easy to control than automatic style in the process of debugging, which can find the problem exist in the system better so as to modification.
This design use some essential security protective design such as fire-alarm, the fluid position alarm, the oil pressure and the barometric pressure value alarm, and so on, which could fit for any kind of production .
Key words:plate filter;PLC;control;dirty oil