SK70793A3 - Loading method of charging stock into glass melting furnace and device for implementing such method - Google Patents

Abstract

In a method and an apparatus for feeding glass making materials through a thermal shield (12) onto the melt bath surface of glass melting furnaces, at least one plate-shaped slide (16) is present, which has a lower edge running parallel to the melt bath surface and carries out slide movements with horizontal and vertical components. In order in this case to achieve a better sealing of the furnace interior, the slide (16), which is fastened eccentrically on a slide support (15) of circular cross-section, carries out superimposed pivoting movements about the axis of the slide support (15) by superimposing rotary and longitudinal movements of the slide support (15) and by a corresponding control of the slide drive (30, 31). When its lower edge is positioned parallel with the melt bath surface and is partially immersed therein, an advance movement towards the glass melting furnace is carried out and, with the lower edge in a pivoted-up position removed from the bath, a withdrawal movement is carried out. In this case, the slide support is guided through a gland bushing in the thermal shield (12), and the charging arrangement present is also, sealed on all sides, surrounded by a charging chamber which is also connected in a sealed manner to the thermal shield (12). <IMAGE>

Description

Method of loading and charge material into a glass melting furnace and apparatus for carrying it out

Technical field

The invention relates to a method for loading batch material into a glass melting furnace, which loading is carried out from a batch collecting tank through a heat shield and a loading aperture onto the surface of the melting bath by means of at least one plate gate which is parallel to the surface of the melting bath. performs the movement of the dam with horizontal and vertical components, during which the depositing material is continuously poured onto the surface of the melting bath.

His prior art

In conventional ways, the lower edge of the gate moves through the starting position, parallel to the vertical and horizontal movable components.

It is known from DE-PS 37 09 178 to guide said lower edge through a parallel guiding system by means of two gate carriers on a rectangular path.

As a result, the feed material continuously fed is divided into individual strip batches which are loaded onto the surface of the melting bath, gradually dropping into it and melting.

Although very precise execution is possible in the known methods, the interior space of the glass melting furnace can only be sealed very poorly against the ambient air. The sealing of the gate carriers against the heat shield is carried out in known solutions by means of cover plates which make oscillating movements on the slots and also in the recesses in the heat shield. Due to the sliding surface temperatures one after the other, high wear. Likewise, high operating areas are subject to an unsatisfactory sealing of the charging device, which is designed as a vibrating conveyor trough, opposite the heat shield. In addition, this known solution has the disadvantage that the feed material is always displaced only perpendicularly to the opposite wall of the furnace, so that there is a risk that if a larger amount of feed material is loaded per time unit, it is displaced relative to the opposite wall of the furnace.

The seal between the loading device and the interior of the furnace, whose loading area in the area of the loading device is usually designed as a bath opening, called a dog house, is of particular importance in fuel-heated glass furnaces. The false air, which has been sucked in by an impermissible amount, disrupts the combustion process, impairs its efficiency and, moreover, causes the furnace to cool down at the point where the melting is to take place. The dampness of this unwanted air increases the amount of flue gas, which means that it is necessary to produce flue gas filters with larger dimensions, which also results in higher flow resistance.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for loading a batch material, a so-called batch of the type described in the introduction, which allows reliable charging of a glass melting furnace while sealing the passages through the heat shield. In evaluating this task, it should be borne in mind that, throughout the prior art, if these sealed heat shield passages are at all concerned, the degrees of freedom required on the one hand and the good sealing effects on the other hand are diametrically opposed.

The object is achieved according to the invention in that, by means of an eccentric on the gate carrier with a circular cross-section of the longitudinally fixed gate, overlapping the rotary and movement of the gate carrier and actuating the drive is covered by the dwelling. In this case, a sliding movement to the glass melting furnace is carried out and a retraction is performed with the upwardly pivotal position of the lower edge.

The method of loading according to the invention, however, allows a very precise charging of the glass melting furnace, it is also possible by means of a loading device which according to

DE-PS

09 178, however, it also provides an additional, yet very good sealing of the single gate carrier for both the gate barrier and the heat shield, in that the gate carrier performs a linear movement at the sealing point which is overlapped or superimposed by rotary movement or rotary movement around the same. axis. Therefore, the gate carrier does not have to perform any pivoting, sliding or throwing movement at the point of passage and at the point of sealing, which makes it possible to create a very strong seal by means of a gland packing which can also be carried out in several stages without problems.

As a result, the combustion process inside the furnace is no longer adversely affected by the charging process at the same time as the false air inlet.

The loading method according to the invention can be further improved by controlling two mirror-symmetrically arranged gates independently of each other such that the displacement step in the submerged state and / or the displacement frequency of the two gate drives 1 is, if necessary, different from each other.

It is thus possible to drive one of the two dams in the submerged state with a small displacement and / or a lower feed frequency than the other of the two dams. The dam is thus divided to a certain extent in the vertical median plane of the loading device and is operated at different conveying capacities. This causes the material to be loaded or the log to be moved at an adjustable angle with respect to both gate holders, so that the horizontal movement of the entire loading device is superfluous. This makes it possible to use a glass melting furnace with a smaller number of loading devices, which, however, themselves have a higher conveying capacity without the risk that the feed material advancing along the glass melt reaches the opposite wall of the furnace or the loading opening of the bath. The input material can be divided into an angular sector as a result of the periodic changes involved in the transport performance of the gate in the time center.

The invention also relates to the administration and distribution of a loading device for a batch material through a loading opening onto the surface of a glass melting furnace having a movable base having a batch collecting tank, a charging device separated therefrom by a substantially horizontal slide carrier on which there is provided a plate dam with a lower edge that is parallel to the surface of the melting bath in the direction of displacement, further having a dam drive to generate movement of the dam with horizontal and substantially constituent components and a heat shield substantially covering the loading aperture an arranged recess for the passage of the charging device and in which at least one sealed bushing for the castle carrier is arranged; and.

The essence of this loading device for solving the task according to the invention consists in that, however, the gate is arranged eccentrically on a single gate carrier with a circular cross-section so that the gate gate is rotatable , however, a radial stationary and sealed sealing bushing is provided in the heat shield, in which the gate carrier is exclusively rotatable and axially displaceable, but the gate drive is designed such that, in the parallel position of the lower gate edge with the surface of the melting bath and the charging device is surrounded by a charging chamber, the first opening of which is sealed to the edge of the recess area in the heat shield and which is through the second It has a charging drive which is arranged outside the charging chamber and whose drive rod is introduced via another gland into the charging chamber and is connected therewith to the charging device.

Such a construction of the loading device is associated with the advantages that, even in a simple arrangement, a very good seal is achieved not only between the gate carrier and the heat shield, but a good seal is also ensured simultaneously between the charging device and the heat shield.

From the point of view of the charging device, the core of the sealing system is said charging chamber, which is sealed against both the heat shield and all other inlets and other passages. It should also be noted that, of course, a seal is also provided between the charge collecting tank and the charging chamber, particularly expediently by means of a flexible bellows bellows made of refractory, in particular mineral fibers.

As a charging device, for example, a vibrating conveyor trough, a loading trough or the like can be used.

In order to prevent the formation of the angular sector within the charging zone, it is particularly advantageous if one slide carrier is arranged on both sides of the vertical median plane of the loader and at the ends of the slide carriers, in a mirror-symmetrical arrangement, and Two eccentrically held damages are mounted with a mirror-symmetrical movement, the ends of which are facing away from the dam carriers and can be aligned before the sliding movement.

Due to the fact that the two gates are connected to mutually independently controllable gates' drives, it is possible to provide for each of the two gates different feed streams of batch material or a strain which can be periodically changed on both gates so that it is possible to perform said oscillating charging within the angular sector.

Furthermore, it is advantageous if the gate carrier and the gate drive are provided as an assembled unit, each of which is at least substantially closed by the drive housing, which as a whole is removable from the movable base.

This box, with its superstructures, constitutes to some extent a drive module for the respective gate, so that such a loading device can optionally be fitted with one or two gate carriers and gate drives.

Furthermore, it is preferred that the charging device and as a whole of the movable support is provided with a removable pedestal with a charging drive. The charging chamber also forms a charging module in this case, which can also optionally be combined with other drive systems.

Further advantageous embodiments of the subject matter of the invention result from the other dependent anvils, the preferred individual features of which are set forth in the following description.

Overview of the figures in the drawing

The invention is explained in more detail below in two exemplary embodiments with a vibratory conveyor trough in conjunction with the drawing.

In FIG.

is a diagrammatic longitudinal section through a portion of a glass melting furnace in the region of a tub loading aperture in conjunction with a longitudinal section in the same plane that is guided by the loading apparatus.

Na is a horizontal cross-section of the object according to a plane just above the charging device. In FIG.

is a vertical cross-sectional view of the glass melting furnace in the region i of the loading opening of the tub, with a slightly enlarged scale view of the loading apparatus.

In FIG. 4 shows a partial vertical cross-section of a drive housing with a gate drive as well as a gate carrier in the region of the heat shield. In FIG. 5 is a cross-sectional view of the gate carrier at V in FIG.

4th

In FIG. 6 shows a variant of the object according to FIG. 1 to 4 with two gates and two drive housings in an analogous representation to that of FIG. 2, i.e. in horizontal section. In FIG. 7 is a view of the loading opening of the tub in the direction of the loading apparatus of the embodiment of FIG. 6, in a view analogous to FIG. 3, it is in vertical section.

In FIG. 8 is an enlarged view of FIG. 1 in the region of the charging chamber for the loading device and the heat shield of the bath opening.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. 1 shows the part of the glass melting furnace 1 to which the loading opening 2 of the tub is connected. This is a known design of a glass melting furnace X with a melting pot 3, so that further details are not described.

The loading opening 2 of the bath is connected to the loading device

4, which is movable in the direction of the longitudinal axis of the glass melting furnace 1 on the castors 5, along the rails 6.

The movable wheels are mounted height-adjustable on the base frame 7, which is connected to the mounting platform 9 by means of supporting columns 8, on which the parts and assemblies described below are fixed.

The base frame 7 and the mounting platform 9 form a so-called movable base 10 by means of which the loading device 4 is movable to the loading opening 11 of the glass melting furnace

First

The tank loading aperture 2, the so-called Dog-House, has a loading aperture 11 which is closed by a heat shield 12 during melting operation of the glass melting furnace 1. Corresponding apertures in the heat shield of the charging device 14 15 on its gate 16 so that they enter the tub. In the present embodiment, the charging device 14 is designed as a vibratory trough 13. The damper 16 is movable from the extended position shown to the dotted position 16a by means of the damper drive 26 described in more detail below. The gate 16 has a lower edge 16b which is slightly submerged below the surface 17 of the melting bath as it slides. The only one or more periodic movements of the gate 16 are the charged material that falls from the vibration trough 13 in the form of stem strips divided such that they slide through the opening 18 in the partition wall 19 between the glass melting furnace 7 and the tank loading opening into the glass melting furnace. .

A charging chamber 20 is sealed to it from the outside of the heat shield, into which the vibrating conveyor trough 13 intersects with the largest part of its length.

The ceiling 21 of the charging chamber 20 also extends through a sealed 1 funnel 22, which, at its lower end, extends into the vibratory conveying trough 13.

The upper end of the funnel is connected to a charge in which only the lower end of the funnel is shown.

FIG.

3 and 3, it can be seen that the mounting plate has longitudinal members

24, in which both the charging chamber 20 and the drive housing 25 are arranged immediately or indirectly, in which a gate drive 26 is provided, which will be explained in more detail below. The assemblies which are provided on the mounting platform 9 are movable by means of the rollers 27 with respect to the movable base 10 in its longitudinal direction. FIG. 1, it is further evident that the tub loading opening 2 and the heat shield 12 are connected to each other by means of sealing fillers 28 and 29, respectively.

According to FIG. 4, the damper drive has two linearly acting drive units 30 and 31, which are arranged in stories above each other. Both drive units 30 are pressurized air drives having piston rods 30a.

optionally 31a. In FIG. 2, the upper floor of the drive 26 of the drive housing 25 with its shutters is omitted, or has been constructed above the plane

E - E removed.

The drive unit 30 controls the axial movement of the gate carrier, and the drive unit 31 controls its rotational movement. In order to compensate for the flaws between the piston rod 30a, which must rotate with the gate carrier 15 and between the gate carrier itself, a drive shaft 30 and a double cardan joint 32 are provided between the gate carrier 15 and the gate 30 via a drive unit 30. 16 to move back and forth between the extracted and dotted positions 16a.

FIG. 3, it is evident that the gate is eccentrically mounted on the gate carrier 15, i.e. by means of an arm

33, and that the gate carrier 15 has a circular cross-section. The lower edge can be lifted by rotating the slide carrier

16b of the melt dam 16 allows it to be disengaged by the surface of the melting bath in the upwardly pivoted position.

Two such possible upwardly pivoted positions are the semicolon 1 marked in FIG. 3, wherein it is evident that the gate 16 can be pulled out of the bath loading opening through the loading opening 11 in the lowest point shown in dotted lines without crashing somewhere. In FIG. 3 also shows a cross-section of the vibratory conveyor trough and the lower edge of the funnel 22 that extends into the vibratory conveyor trough 13. It goes without saying that the charging chamber 20 with the vibratory conveying trough 13 is pulled back from the loading opening 2 of the tub always together with the gate 16.

In FIG.

The swinging of the gate 16 shown in FIG.

The linear piston 31a is first stabilized by a longitudinal guide 34. The piston 31a is then connected by means of a link 35 to a fixed cranked lever 36, which is at its apex at a nearer depicted location for balancing vertical transverse drives. fixedly positioned on the bearing stand 37.

also a carrier 15 of the knuckle lever 36 is connected to the articulated slide.

liaison and cou

One end

38. whose end facing away from the crank lever 36 extends into the forked radial lever 39, the transmission of forces to the gate carrier 15 in FIG. 5 is shown schematically. The forked radial lever 39 is mounted in the outer sleeve 40, which first acts on the inner sleeve 42 by means of the parallel key 41, which then transmits the torque received by the additional parallel key 43 to the gate carrier 15. This arrangement provides the desired degree of freedom for the longitudinal movement of the gate carrier 15 relative to the rotary drive. The swing plane of the fixed crank lever 36 is parallel to the plane of the drawing of FIG. 4, but perpendicular to the plane of the drawing of FIG. 2. The cranked lever 36 thereby causes a roughly tangential movement to the forked radial lever 39. The necessary degree of freedom for the lateral movement is ensured by adjusting the articulated joint 38.

As can be seen from FIG. 6 and 7, on each side of the vertical median plane M-M of the modified loading device 44, there is provided one slide carrier 45 or 45, respectively, which is provided with a slide gate 46 and 47 at its end. 47 are shorter than the single gate 16 shown in FIG. 3 so that the ends 46a and 47a of the gate members 46 and 47 that are facing away from the gate carriers 15 and 45 do not interfere with each other. In performing the feed movement, said ends 46a and 47a are directed towards each other, but only when synchronous feed movements are performed. It has already been stated that these displacement movements can be performed in a submerged position with a different stroke or a different frequency in order to be able to wipe off the angular area with a periodic change of the conveying direction by alternatively controlling the conveying power of both gates 46, 47. This different control option is shown in FIG. 6th

Otherwise, both gate actuators 26 and 48 are mirrored to the median plane M - M, including the cabinet.

25 or 49, respectively, that surround them.

In particular, by comparing FIG. 2 and 6 it can be shown that the loading devices 4 and 44 are designed as modules, i.e. such loading devices 4, 44 can be easily adjusted or retrofitted. For example, the loading device 4 of FIG. 2 by extending the gate 16 and the additional superstructure of the drive housing 49 with the gate drive 48 and the gate carrier 46 to extend the gate 47 as well. In terms of the charging chamber 20 and their built-in and mounted groups as well as the vibration conveyor trough 13 no changes. .

In FIG. 7 shows parts of the loading device 44 that extend into the area of the loading opening 2 of the tub. The gate 46 is formed analogously to the gate 16 in FIG. 3, but with a substantially shorter bottom edge. The second damper 47 is configured and arranged mirror-symmetrically so that a distance is formed between the ends 46a and 47a. Also in this case, the two gates 46 and 47 can be swiveled to the upwardly pivoted position, which is indicated in dotted lines in several different areas.

The constructional elements of the charging device 14, which is also designed here as a vibratory conveying trough 13, are explained in more detail on the basis of FIG. 8th

The charging chamber 20 is formed by an outer shell 50 with a refractory ceramic lining 51. The heat shield 12 has in the region of the vibratory conveying trough 13, which is fixed to the charging chamber 20 by means of inclined 1 spring springs 53.

The charging chamber 20 has a first opening 54 for the passage of the vibratory conveying trough 13, which substantially aligns with the recess 52 in the heat shield 12. At this point, the charging chamber 20 is also connected to the heat shield 12. The charging chamber 20 also has a second opening 55 FIG. 8 and which is sealed by means of a funnel 22 to a collecting tank 23 not shown here.

The drive rod 57 of the batch drive 58, which in this case is designed as a vibratory drive, passes through the bottom of the charging chamber 20 through an inclined sleeve 56. The drive rod 57 is sealed against the charging chamber 20 by means of a further seal bushing 59 so that no leakage or gas inlet can occur at this point. The opposite end of the drive rod 57 is connected to the vibratory conveying trough 13.

As shown in FIG. 8, the vibratory conveying trough 13 is connected to the charging chamber 20 by means of a rod guide 60 which is parallel to the batch drive 58. This rod guide 60 has a guide rod 61. which is also connected to the charging chamber 20 via the gland 62.

In FIG. 4 it is shown that the gate carrier 15 is also sealed through the bushing 63 in the heat shield 12. While in the prior art the slotted bushings have to be sealed with sliding plates, the bushing 63 in the device according to the invention is also sealed in the step seal.

64. so that no gas can be added to it at this point.

The gate carriers are pierced with cooling water.

For this purpose, the gate holders are designed with double walls.

or as concentric pipes and connected via side connections 65 and 66 to a cooling circuit (not shown).

However, it is of crucial importance that insulating members 67 are arranged between the heat shield 12 and the seal bushing 64 mounted thereon. Furthermore, there is a portion of the gate carrier 15 which is provided outside the seal bushing and

in front of the drive housing 25.

an additional insulating member is provided

68. Insulating members 67 a

68, the state of which results from FIG. 4 en indicates no difficulty for the skilled person. These insulating members 67 provide galvanic separation of those parts of the charging device that are exposed to the melt from a predetermined weight potential. Also connections 65 and 66 are connected to the cooling circuit via flexible insulating hoses.

swinging movement of gates

These flexible joints also provide the necessary value

16, 46, which may have a maximum of 90 degrees.

Claims (14)

1. Melting furnace method, batch tank PATENT LOAD LOADING WHICH LOADING THROUGH THE THERMAL SURFACE OF THE MOLDING BOARD OF A SLIDED SLIDER THAT YEARS r. 707-43 of glass material is made of collecting shield and the loading environment has a bottom edge arranged parallel to the melting bath and with horizontal and vertical components, with running material for the purchase 1, with a t the surface of the at least one surface is performed by the movement of the gate in which the surface of the gate melts by overlapping the rotary and longitudinal movements of the gate carrier and controlling the gate drive at a parallel position of its lower edge with the surface by means of the melting bath and partial immersion therein, it moves in the direction of the glass furnace, and in the case of the upwardly swiveled, raised position of the lower edge a backward movement is performed. Method according to claim 1, characterized in that the two mirror-symmetrically arranged rebates are actuated independently of one another such that the displacement step in the submerged state and / or the displacement frequency of the two gate drives is or are different from each other. 3, the barrier has two of which one movement of the gate carrier (15) and the other drive unit (31) its rotational movement. A loading device for carrying out the method according to claim 1 having a movable base having a batch collection tank, a charging device separated therefrom by a substantially horizontally arranged gate carrier, on which a board gate with a lower edge which is parallel to the feed direction is arranged. with a surface of the melting bath, further having a damper drive for generating horizontal and vertical damper movement, and a heat shield substantially covering the loading aperture in which the recess for the feed device passage is arranged and wherein the at least one sealed carrier for the carrier is provided gate, characterized in that however, the gate (16, 46, 47) is arranged eccentrically on a single gate carrier (15, 45) with a circular cross-section such that the rotary movement of the gate carrier (15, 45) is the lower gate Tirana (16b) (16, 46, 47) extendable to the upward pivoted position out of engagement with the a top surface (17) of the melting bath, however, a radial stationary and sealed packing bushing (64) is arranged in the heat shield (12), in which _{r the} gate carrier (15, 45) is exclusively rotatable and axially displaceable, yet the drive (26) The damper is formed such that, at the parallel position of the lower edge (16b) of the dam (16) with the surface (17) of the melting bath, it moves the dam (16) to the glass melting furnace (1) and the lower edge (16b). it performs a return movement of the gate (16), and nevertheless the charging device (14) is surrounded by a charging chamber (20), the first opening (54) of which is sealed to the edge region of the recess (52) in the heat shield (12) and an aperture (55) sealed to the collection tank (23), and has a batch drive (58) that is disposed outside the charging chamber (20) and whose drive rod (57) is introduced by a further plugging a bushing (59) into the charging chamber (20) and therein connected to the charging device (14). Loading device according to claim 3, characterized in that one slide carrier (15, 45) is arranged on both sides of the vertical median plane (M - M) of the loading device (44) and at the ends of the slide carrier (15, 45) when viewed in the direction of the axis of the gate carriers (15, 45) in a mirror-symmetrical arrangement and with mirror-like movement, two eccentrically held gate (46, 47) are fixed, the ends (46a, 47a) facing away from the gate carriers (15, 45). are counterbalanced prior to the translational movement. 5. The loading device is characterized in that the two are independent of each other by means of gates. 6. A loading device comprising a carrier 48) the gates are provided as at least a largely enclosed housing which as a whole is removable from the movable pedestal (10). according to claim 4, the dams (46, 47) are connected to controllable actuators (26, 48) according to claim 3, characterized by (15, 45) the dam and the drive (26, built-in ₁ in each case, (25, 49), Loading device according to claim 3, characterized in that the charging chamber (20) can be removed as a whole from the movable base (10) with the charging device (14) and the charging drive (58). Loading device according to claims 6 and 7, characterized in that the movable base (10) has a horizontal mounting platform (10). Loader according to claim 7, characterized in that the charging drive (58) for the charging device (14) is arranged on the side of the charging chamber (20) facing away from the heat shield (12). 9) for the drive housing (25, 49) and for the charging chamber (20) which is spaced from the base frame (7) and which is formed of the longitudinal members (24). Loading device according to claim 3, characterized in that the charging chamber (20) is provided with a refractory ceramic liner (51). Loading device according to claim 8, characterized in that the charging chamber (20) is movable on the mounting platform (9) in the longitudinal direction of the charging device (14) by means of the rollers (27). 12th Loading device according to claim 3, characterized in that. characterized in that the charging device (14) is connected to the charging chamber (20) by means of at least one with a charging drive (58) of a parallel rod guide; Load-bearing th e linear acting drive unit of the device according to claim m, wherein the drive (26, 48) of the unit (30, 31), (30) actuates axially Loader according to claim 13, characterized in that the gate drive (26, 48) for pivotal movement is connected by means of a fixed crank lever (36) to the articulated joint (38), the end of which is turned away from the crank lever (36). by tangential movement to the radial lever (39) connected to the gate carrier (15, 45), and the pivot plane of the fixed crank lever (36) is parallel to the axis of linear movement.