Corn stalk pretreatment apparatus and method for manufacturing pulp from corn stalks

A corn stalk pretreatment apparatus comprising:

• a raw material fragmenting unit which receives, cuts, and fragments corn stalks;
• a foreign substance removal unit which receives the fragmented corn stalks and filters out foreign substances;
• a first separation unit which receives the corn stalks from which foreign substances have been removed and separates the corn stalks into rind and pith;
• a second separation unit which, after the corn stalks have been separated, separates the corn stalks into the rind and pith once more and crushes and finely fragments the rind and the pith into a chip form, the second separation unit comprising:
• a casing which guides the rind separated by the first separation unit and inserted into a top thereof using a freefalling method to be discharged through a bottom thereof;
• and
• a rotor which is axially inserted into the casing and crushes the rind which flows thereinto into a chip form while separating the rind and pith, and wherein the rotor comprises:
• a shaft axially inserted in the casing and rotated by an external force;
• a cover member into which the shaft is rotatably inserted and fixed and which is connected to the entire or a part of an open top of the casing;
• and
• a crushing portion which is formed on a circumferential surface of the shaft and crushes the rind and pith supplied into the casing;
• a cyclone which receives the pith in the chip form and separates the contained rind;
• a final sorting unit which receives rind chips separated by the second separation unit together with rind chips separated by the cyclone and finally separates and discharges rind chips and pith chips;
• and
• a dust collection unit which collects, purifies, and discharges dust generated in the foreign substance removal unit and the final sorting unit.