Patent ID: 8828318
Filing Date: 2014-09-09
Classification: B01D

Abstract:
1. A high-pressure extraction apparatus, comprising: an extraction tank, comprising a receiving chamber, a feeding port, a first inlet, a second inlet, a recycling port, and a discharging port; a piston, disposed in the receiving chamber and separating the receiving chamber into an extraction space and a first space, wherein the feeding port, the first inlet, and the discharging port are disposed in the extraction space, and the second inlet and the recycling port are disposed in the first space; a control unit, for sequentially an extract separation unit; a medium storage tank, for storing the medium; a supply device, wherein when the supply device is actuated by the control unit, the supply device gets the medium from the medium storage tank, and provides the medium having a preset pressure; an substance storage tank, for storing the substance for extraction; a first valve, for selectively making the substance storage tank and the feeding port communicated or not communicated; a second valve, for selectively making the supply device and the first inlet communicated or not communicated; a third valve, for selectively making the medium storage tank and the recycling port communicated or not communicated; a fourth valve, for selectively making the extract separation unit and the first inlet communicated or not communicated; a fifth valve, for selectively making the supply device and the second inlet communicated or not communicated; and a sixth valve, for selectively opening or closing the discharging port, wherein the control unit controls the first valve to communicate the substance storage tank with the feeding port, so that the substance for extraction enters the extraction space; the control unit actuates the supply device, enables the second valve to communicate the supply device with the first inlet, and enables the third valve to communicate the medium storage tank with the recycling port to perform extraction on the substance for extraction in the extraction space and discharge the medium in the first space to the medium storage tank through the recycling port; the control unit controls the fourth valve to communicate the extract separation unit with the first inlet, and controls the fifth valve to communicate the supply device with the second inlet, so as to discharge the medium and the extract in the extraction space to the extract separation unit through the first inlet; and the control unit controls the fourth valve to close the communication between the extract separation unit and the first inlet, controls the fifth valve to communicate the supply device with the second inlet, and controls the sixth valve to open the discharging port, so as to enable the medium to enter the first space through the second inlet, so that the piston discharges the extraction residue through the discharging port.