Coal flow monitor for pulveriser - uses radiation sensor to detect coal volume in zone to operate partial or empty alarm signals

A radiation sensitive detector senses the amount of coal present at a zone of the pipe and generates a stream of pulses which is sampled at discrete sample intervals of time to determine whether the conduit zone is empty, partially filled or filled. If the conduit zone is partially filled, a partial...

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Bibliographische Detailangaben
1. Verfasser:	DONALD W. LAPLANTE, ARTHUR FAIRCHILD ET EUGENE L. REBUCCI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY CONVEYING CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL HANDLING THIN OR FILAMENTARY MATERIAL INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MANUFACTURE OF IRON OR STEEL MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK METALLURGY METALLURGY OF IRON MILLING GRAIN PACKING PERFORMING OPERATIONS PHYSICS PNEUMATIC TUBE CONVEYORS PREPARATORY TREATMENT OF GRAIN FOR MILLING SHOP CONVEYOR SYSTEMS STORING TESTING TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING
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Beschreibung
Zusammenfassung:	A radiation sensitive detector senses the amount of coal present at a zone of the pipe and generates a stream of pulses which is sampled at discrete sample intervals of time to determine whether the conduit zone is empty, partially filled or filled. If the conduit zone is partially filled, a partial alarm is generated. A determination is made as to whether the conduit zone is empty. If the conduit zone is empty, an empty alarm is generated and the feeder is stopped after a predetermined amount of coal has been deposited on the feeder. If the conduit zone is partially filled and a shut-off valve between the bunker and conduit is closed, a coal build-up alarm is generated. If the conduit zone is filled and the profile of coal at the feeder is not at full profile, a coal hang-up alarm is generated. If the conduit zone is partially filled and the profile of coal at the feeder is at full profile, a vent alarm is generated. A self-testing circuit periodically simulates each of these conditions to test the unit. APPAREIL POUR CONTROLER L'ECOULEMENT DU CHARBON A PARTIR D'UNE SOUTE A CHARBON A TRAVERS UN CONDUIT ABOUTISSANT A UN ALIMENTEUR QUI DELIVRE LE CHARBON A UN BROYEUR.APPAREIL CARACTERISE EN CE QU'IL COMPORTE DES MOYENS POUR DETECTER LA QUANTITE DE CHARBON PRESENT DANS UNE ZONE DE LA CONDUITE ENTRE LA SOUTE ET L'ALIMENTEUR 18 ET POUR ENGENDRER UN SIGNAL PULSE INDIQUANT CETTE QUANTITE; DES MOYENS 36 REAGISSANT A CE SIGNAL PULSE POUR DETERMINER SI LA QUANTITE DE CHARBON PASSANT A TRAVERS CETTE ZONE DE LA CONDUITE, PENDANT UN INTERVALLE DISCRET DE TEMPS, N'EST PAS SUPERIEURE A UNE PREMIERE VALEUR SELECTIONNEE, ET POUR ENGENDRER UN SIGNAL D'ETAT D'ECOULEMENT PARTIEL POF INDIQUANT CETTE SITUATION.L'INVENTION S'APPLIQUE NOTAMMENT A L'ALIMENTATION DES CENTRALES A CHARBON.