[Problem] To provide a mechanical stirring-type desulfurization system which is capable of detecting the level of the surface of a bath of hot metal using a simple method and automatically adjusting a lance to the optimum position in accordance with the detected bath surface level. [Solution] The present invention is characterized by comprising a control unit 14 that controls movement such that the tip end of a top lance 10 reaches a position at a prescribed height from the surface of the bath in a hot metal ladle 2, wherein the control unit 14 is provided with: a movement distance calculating means that calculates the freeboard ΔH of the hot metal ladle 2 from the inner diameter D of the hot metal ladle 2 and the inclination angle of the hot metal ladle 2 during slag removal, which is a pretreatment before desulfurization, and calculates a movement distance L for the top lance on the basis of the calculated freeboard; and a lance driving means that, on the basis of the calculated movement distance L, drives the top lance 10 such that the tip end of the top lance reaches a position at a prescribed height from the bath surface in the hot metal ladle 2.
The present invention comprises a cylindrical valve body (2) in the side surface of which a flow regulation groove (3) is formed so as to allow the transit of granules, a slide block (4) having at least one flat surface, and a case (6) accommodating the cylindrical valve body (2) and the slide block (4), the present invention characterized in that the slide block (4) is fixed to the case (6) by means of an elastic body (5), the side surface of the cylindrical valve body (2) and the flat surface make contact with each other by being pressed by the elastic body (5), the flow regulation groove (3) is provided in the shape of a cut-out from the outer circumferential side of the side surface of the cylindrical valve body (2) towards the central axis, and the transit rate of granules or the like is regulated by rotating the cylindrical valve body (2) and thereby varying the opening area of a transit part formed by the flow regulation groove (3) of the cylindrical valve body (2) and the flat surface of the slide block (4).
F16K 13/02 - Autres types structuraux de dispositifs obturateursAgencements pour obturer dont les deux faces d'obturation ont la forme de petits segments de cylindre avec organe mobile monté sur articulation à pivot
F16K 3/32 - Dispositifs pour le réglage additionnel du débit
A powder supply device includes a controller configured to receive an output from a load cell and an output from a pressure indicator, wherein the controller obtains a powder weight or a rate of change in the powder weight in a feed tank on the basis of a value obtained by subtracting a value proportional to the output from the pressure indicator from the output from the load cell and controls the flow rate of the powder to be supplied to outside of the feed tank on the basis of the powder weight or the rate of change in powder weight in the state in which a closing valve is closed.
B65G 53/06 - Systèmes à pression de gaz fonctionnant sans fluidification des matériaux
B65G 53/40 - Dispositifs d'alimentation ou de décharge
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
F23K 3/02 - Alimentation pneumatique, c.-à-d. par courant d'air
G01G 13/00 - Appareils de pesée avec remplissage ou vidange automatiques pour peser des quantités données d'un produit
G01G 11/08 - Appareils pour peser au passage un produit dont l'écoulement est continuAppareils de pesée pour bande transporteuse ayant des moyens pour contrôler le taux de remplissage ou de vidange
A powder supply device 1 includes a powder feed pipe, at least part of which is an expansion/contraction part, a load cell, a pressure indicator, and a controller, wherein the controller obtains a powder weight or a rate of change in powder weight in the feed tank by using a value obtained by subtracting a value proportional to the pressure in the expansion/contraction part from the load applied by the feed tank to the load cell and adding a value proportional to a rate of change in pressure in the expansion/contraction part, and controls the flow rate of the powder to be fed to the outside of the feed tank by using the powder weight or the rate of change in powder weight.
F27D 3/00 - ChargementDéchargementManutention des charges
F27D 3/18 - Chargement de matériaux particulaires en utilisant un fluide transporteur
G01G 11/08 - Appareils pour peser au passage un produit dont l'écoulement est continuAppareils de pesée pour bande transporteuse ayant des moyens pour contrôler le taux de remplissage ou de vidange
A Powder feeding system for feeding powder in a feed tank via a valve for powder downstream of the feed tank and through a powder delivery pipe, the Powder feeding system including: a powder fluidizing portion provided in the feed tank and configured to introduce fluidizing gas for fluidizing the powder; and a powder refluidizing portion provided between the powder fluidizing portion and the valve for powder and configured to introduce refluidizing gas for refluidizing the powder.
B65G 51/16 - Variation, p. ex. mise en marche ou arrêt, de la pression ou de l'écoulement du gaz
B65G 53/16 - Systèmes de pression de gaz fonctionnant avec fluidification des matériaux
B65G 53/22 - Systèmes de pression de gaz fonctionnant avec fluidification des matériaux à travers une paroi poreuse les systèmes comprenant un réservoir, p. ex. un caisson
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
C21B 5/00 - Fabrication de la fonte brute dans les hauts fourneaux
F27D 3/16 - Introduction d'un jet de fluide ou d'un courant dans la charge
Provided is a powder supply apparatus and powder supply method that make it possible to suppress the occurrence of powder flow volume undershooting while rapidly reducing the powder flow volume. The present invention is characterized by the following: in a rapid load reduction mode in which the flow volume of powder to be supplied to the outside of a feed tank (11) is to be reduced to a given volume after a given period of time, a control unit (60) puts an internal pressure adjustment valve (22) in the exhaust state while also closing the powder valve (21) to a given degree of openness, and once the powder flow volume drops below the powder flow volume that is expected before a given amount of time has passed, at least either the internal pressure adjustment valve (22) or the powder valve (21) is controlled so that the powder flow volume reaches the expected powder flow volume.
B65G 65/40 - Dispositifs pour vider autrement que par le haut
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
F23K 3/02 - Alimentation pneumatique, c.-à-d. par courant d'air
In order to provide a powder supply device and a powder supply method with which the flow volume of the powder being supplied can be controlled more accurately, a powder supply device (1) is equipped with: a powder supply pipe (70) at least a portion of which is formed as an expansion/contraction unit (71); a closing valve (76) arranged between the expansion/contraction unit (71) and a feed tank (11); a pressure indicator (78) that detects the pressure in the expansion/contraction unit (71); a load cell (45) that receives the load of the feed tank (11); and a control unit (60) that receives the output from the load cell (45) and the output from the pressure indicator (78). When the closing valve (76) is closed, the control unit (60) determines the weight of the powder or the rate of change in the weight of the powder in the feed tank (11) on the basis of a value obtained by subtracting from the output value from the load cell (45) a value which is proportional to the output value from the load indicator (78), and controls the flow volume of the powder supplied from the feed tank (11) on the basis of the weight of the powder or the rate of change in the weight of the powder.
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
B65G 65/40 - Dispositifs pour vider autrement que par le haut
The purpose is to provide a powder supply device and a powder supply method with which it is possible to more accurately control the flow of a powder to be supplied. The powder supply device (1) is provided with: a powder supply tube (70) in which at least one section thereof is an extendable/contractable section (71); a load cell (45) for receiving a load from a feed tank (11); a pressure indicator (48) for detecting the pressure within the extendable/contractable section (71); and a control unit (60). Therein, the control unit (60): subtracts a value proportional to the pressure within the extendable/contractable section (71) from the load received by the load cell (45) from the feed tank (11); obtains the powder weight or the rate of change in the powder weight in the feed tank (11) on the basis of a value to which a value proportional to the rate of change in the pressure within the extendable/contractable section (71) is added; and controls the flow of powder to be supplied to the exterior of the feed tank (11) on the basis of the powder weight or the rate of change in the powder weight.
A powder supply apparatus (1) of the present invention is provided with: a valve (21) for a powder, said valve being connected to powder transport piping (31); an inner pressure adjusting valve (22), which is connected to a feed tank (11), and which adjusts pressure in the feed tank (11); and a carrier gas main tube (33), which is connected to the powder transport piping (31), and which introduces a carrier gas for transferring the powder. In a state wherein, by means of the inner pressure adjusting valve (22), a pressure difference between pressure in the feed tank (11) and pressure in the carrier gas main tube (33) is adjusted to be constant, the valve (21) adjusts a powder flow quantity in the powder transport piping (31) to be constant, and in a state where the open degree of the valve (21) is set constant after the powder flow quantity is adjusted by means of the valve (21), the inner pressure adjusting valve (22) adjusts the pressure difference such that the powder flow quantity is constant. Consequently, this invention is capable of accurately controlling, in a short time, the quantity of the powder to be supplied. A powder supply method of the present invention has same features.
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
B65G 65/40 - Dispositifs pour vider autrement que par le haut
B65G 65/48 - Dispositifs pour vider autrement que par le haut utilisant d'autres moyens de rotation, p. ex. des écluses rotatives à pression dans des systèmes pneumatiques
A powder supply apparatus (1) of the present invention supplies a powder in a feed tank (11) from powder transport piping (31) via a valve (21) for the powder, said valve being in the downstream of the feed tank (11). The powder supply apparatus is characterized in being provided with: a powder fluidizing unit (54), which is provided on the feed tank (11), and which introduces a fluidizing gas that fluidizes the powder; and a powder re-fluidizing unit (57), which is provided between the powder fluidizing unit (54) and the valve (21) for the powder, and which introduces a re-fluidizing gas that re-fluidizes the powder. With such features, this invention is capable of stably supplying the powder. A powder supply method of the present invention has same features.
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
C21B 5/00 - Fabrication de la fonte brute dans les hauts fourneaux
F27D 3/16 - Introduction d'un jet de fluide ou d'un courant dans la charge
In this powder supply apparatus, a pressure difference is adjusted to be constant by adjusting pressure in a feed tank (11) by means of an inner pressure adjusting valve (22) connected to the feed tank (11), said pressure difference being a difference between pressure in a carrier gas main tube (33), which is connected to powder transport piping (31), and which introduces a carrier gas for transferring a powder, or pressure in a feed tank (11), and pressure in a powder transport piping (31). A powder flow quantity in the powder transport piping (31) is adjusted to be constant by means of a valve (21) for the powder, said valve being connected to the powder transport piping (31). After the powder flow quantity is adjusted by means of the valve (21), an open degree of the valve (21) is set constant, and the pressure difference, which has been adjusted to be constant at the time of adjusting the valve (21), is adjusted such that the powder flow quantity is constant, by adjusting the pressure in the field tank (11) by means of the inner pressure adjusting valve (22). This invention is capable of accurately controlling, in a short time, the quantity of the powder to be supplied. A powder supply method of the present invention has same features.
B65G 53/66 - Utilisation de dispositifs indicateurs ou de commande, p. ex. pour commander la pression du gaz, pour régler le pourcentage matériaux-gaz, pour signaler ou éviter l'embouteillage des matériaux
B65G 65/40 - Dispositifs pour vider autrement que par le haut
B65G 65/48 - Dispositifs pour vider autrement que par le haut utilisant d'autres moyens de rotation, p. ex. des écluses rotatives à pression dans des systèmes pneumatiques
Provided is a slag removing apparatus, which can remove slag more flexibly according to the state of a slag distribution, the change in a container for molten metal, and so on. The slag removing apparatus (40) comprises a slag collecting unit (50) for scooping slag (2) on molten metal (1), a slag collecting unit turning device (60) for turning the slag collecting unit (50), as indicated by the arrow (20), and a slag collecting unit vertically/horizontally moving mechanism (6 to 9 and 60) for moving the slag collecting unit horizontally and vertically.
An excess sludge amount in a bioreactor in an effluent treatment facility in which excess sludge is generated is reduced by feeding an activated sludge material showing a kinase enzymatic specific activity of 150 [Units/g-MLSS] or more and a pectinase enzymatic specific activity of 120 [Units/g-MLSS] or more to the bioreactor. After the activated sludge material is fed, at the time when any of a kinase enzymatic activity value, a pectinase enzymatic activity value, and a protease enzymatic activity value of the activated sludge in the bioreactor falls below the following numerical values, the activated sludge material is fed to the bioreactor thereby performing maintenance of the bioreactor. Kinase enzymatic activity value: 50 [Units/L] Pectinase enzymatic activity value: 40 [Units/L] Protease enzymatic activity value: 0.3 [Units/L]
C12N 1/00 - Micro-organismes, p. ex. protozoairesCompositions les contenantProcédés de culture ou de conservation de micro-organismes, ou de compositions les contenantProcédés de préparation ou d'isolement d'une composition contenant un micro-organismeLeurs milieux de culture
brevets
