CLASSIFIER, PULVERIZING AND CLASSIFYING DEVICE, AND PULVERIZED COAL BURNING BOILER

• Main Authors: UCHIDA, Hidechika, MATSUMOTO, Shinji, FUKUI, Kazushi, DAIMARU, Takuichiro, ARIMA, Kenichi
• Format: Patent
• Language: English; French; German
• Published: 02.03.2022
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; FEEDING FUEL TO COMBUSTION APPARATUS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MILLING GRAIN; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL; PERFORMING OPERATIONS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; SEPARATING SOLIDS FROM SOLIDS; SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS; SORTING; TRANSPORTING; WEAPONS

A classifier is provided with: a housing constituted so as to take in air from the bottom in an outer peripheral area of an inner space; a flow correcting unit provided on the inside wall surface of the housing and constituted so as to change the direction of the airflow toward the center axis side of the housing; and a ring shaped rotating unit provided rotatably in an inner peripheral area positioned on the inner peripheral side of the outer peripheral area in the inner space of the housing and constituted so as to classify particles accompanying the airflow. The ring shaped rotating unit has a plurality of rotating blades arranged and spaced around the axis of rotation of the ring shaped rotating unit. The external form of the ring shaped rotating unit formed by the plurality of rotating blades in a side view of the ring shaped rotating unit has an angle ¸ of 75° or less formed by the external shape of the ring shaped rotating unit with respect to a line extending from the ring shaped rotating unit in a horizontal direction toward the outside in the radial direction.