Apparatus and method for low temperature dehydrating and drying sludge using supercritical CO2

摘要

The present invention relates to a low-temperature sludge dewatering and drying apparatus and method using supercritical carbon dioxide that can effectively dehydrate moisture contained in sludge and moisture contained in microorganisms or fibers in the sludge using supercritical carbon dioxide, and the present invention A low-temperature sludge dewatering and drying apparatus using supercritical carbon dioxide according to the present invention comprises: a sludge supply device for supplying sludge to a sludge dewatering reactor; a sludge dewatering tank that provides a space for the dewatering process of sludge; a carbon dioxide supply device for storing gaseous carbon dioxide and supplying carbon dioxide to a pressurization device; a pressurizing device for selectively applying pressure to the internal space of the sludge dewatering tank while injecting carbon dioxide supplied from the carbon dioxide supplying device into the sludge dewatering tank; a constant temperature device for maintaining the internal space of the sludge dewatering tank at a constant temperature; a gas-liquid separation device for separating a mixture of gas and liquid discharged from the sludge dewatering reactor into carbon dioxide gas and water after the sludge dewatering process is completed; and a deodorizing device that removes odor components contained in the moisture for the moisture separated and discharged through the gas-liquid separator.