PRESSURE VESSEL AND METHOD FOR CLEANING THEREOF

摘要

The present invention relates to a pressure vessel which can effectively remove contaminants accumulated in a filter unit, and to a method for cleaning the same. To this end, the pressure vessel comprises: a pipe shaped frame unit having a space wherein fluid flows; raw water introduction units formed at one end of the frame unit; a filter unit filled inside the frame unit to filter the raw water introduced through the raw water introduction unit; produced water discharge units which discharge the produced water filtered from the raw water through the filter unit to the outside of the frame unit; concentrated water discharge units which are formed at the other end of the frame unit to discharge the concentrated water remaining after being filtered through the filter unit to the outside thereof; and an introduction unit for cleaning which is disposed between the raw water introduction unit and the concentrated water discharge unit to supply a cleaning solution to the inside of the frame unit when washing the filter unit. The introduction unit for cleaning includes: a first introduction unit connected to a water collecting pipe, which is a transfer path for the produced water to the produced water discharge unit; and a second introduction unit which is connected to a space between the frame unit and the water collecting pipe.