SYSTEM AND METHOD FOR DECREASING VOC IN CRUDE OIL TANKER

摘要

The present invention relates to a reducing device for a volatile organic compound for a crude-oil carrier and a control method using the same. The present invention is to reduce a volatile organic compound generated in a vertical loading pipe when a crude oil is loaded by an existing facility in a vessel. The crude oil is supplied to the crude-oil carrier on the ground through a main line. The crude oil supplied to the main line by the vertical loading line having a pressure sensor on an upper end is transferred and stored in a cargo tank through a variable valve installed in a distribution line after being moved to the distribution line in the cargo tank. A pressure in the upper end of the vertical loading line is measured by the pressure sensor, and a pressure measurement value measured by the pressure sensor is input in a control unit. The control unit controls an opening and closing rate of the variable valve by comparing the pressure measurement value to a preset upper limit pressure value and a preset lower limit pressure value. When the pressure measurement value is decreased to less than the preset lower limit value, the variable valve is controlled from an opening side to a closing side. When the pressure measurement value exceeds the preset upper limit value, the variable valve is controlled from the closing side to the opening side. When the pressure measurement value is greater than or equal to the preset lower limit value or lower than or equal to the preset upper limit value, an opening operation or a closing operation of the variable valve stops. Therefore, the pressure valve in the vertical loading line is maintained between the preset upper limit value and the preset lower limit value.