RU67576U1 - LINE FOR PRODUCTION OF SHEET POLISHED GLASS - Google Patents

Abstract

The utility model relates to the construction materials industry, in particular to devices for the production of glass by the continuous method. The line for the production of polished glass sheet contains a glass melting bathroom, including a loading pocket with charge loaders, a cooking part consisting of a heated zone and a condensation zone, a pinch, a studio part and a production channel, a float bath, annealing furnace, roller table and carving machines. Bathroom glass melting furnace is equipped with four table loaders for continuous feeding of the charge into the loading pocket. Moreover, the glass melting furnace is equipped with a water-cooled element containing fastening and cooling sections connected by a transition section and placed along the longitudinal axis of the furnace perpendicular to the end wall of the loading pocket between the charge loaders. The area of the heated zone of the glass melting furnace refers to the area of the refrigerating section of the water-cooled element, as 1: (0.013-0.038). The pinch is equipped with two mixers mounted opposite each other and perpendicular to the side walls of the pinch, and made in the form of a pipe with three water-cooled U-shaped blades, and made with the possibility of reciprocating motion. The clamping area of the glass melting furnace refers to the area of the water-cooled surface of the mixer blades, as 1: (0.026-0.036). The glass melting furnace is equipped with two water-cooled elements perpendicular to the end of the wall of the loading pocket in the immediate vicinity of the side walls of the glass melting furnace. The invention improves the quality and increases the number of produced products, and also extends the life of the line for the production of polished flat glass. The application of the invention allows to increase the service life of the glass melting furnace, to improve the quality of products produced, to increase the production of glass. 12 s.p. f-ly, 5 ill.

Description

Technical field

The utility model relates to the construction materials industry, in particular to devices for the production of glass by the continuous method.

State of the art

The prior art continuous production line for the production of sheet glass. The line includes a bathroom furnace, a rolling machine, a glass annealing furnace, a polariscope, a flanging mechanism, a fragmentation mechanism, an accelerator roller table, an end stacker roller table, an end stacker, a hoist with a suction frame and a table cutter. In the continuous rolling process, the molten glass welded in the bath furnace through a special trough (drain tray) enters the rolling mill and, as a continuous strip, into the tunnel annealing furnace. With one-sided processing of glass sheets, the tape exiting the furnace is cut into separate sheets. In double-sided processing, the tape is fed onto the uncut conveyor (see L. M. Butt, Glass Technology, State Publishing House of Literature on Construction, Architecture and Building Materials, Moscow, 1960, pp. 251-256).

With this continuous rolling method, a clear sheet glass is produced, which is used for grinding and polishing. Continuous rental is a high-performance production method. One machine with a width of 3 m is capable of producing up to 250 tons of glass melt per day. However, this method also has disadvantages: they produce glass with a thickness of more than 4-5 mm; In addition, glass produced by continuous rolling requires grinding and polishing. In order to reduce processing costs and glass losses, they strive to obtain a tape of the most even thickness and the smoothest possible surface. With good quality rolled products on each side of the sheets removed when grinding only 0.3-0.5 mm glass.

At the end of the 50s, the English company Pilkington Brothers Limited developed a new method for producing polished glass by forming a glass ribbon on tin melt, called the float process (floating glass). The new method turned out to be so promising, economically viable and technically perfect that in a short time (10-15 years) it completely replaced mechanical conveyors for glass processing and became dominant in the world (N.M. Pavlushkin, Chemical technology of glass and glass, Moscow, Stroyizdat, 1983, pp. 233-234).

The principle of molding is that a strictly dosed amount of molten glass from the working part of a glass melting furnace flows down the drain tray onto the mirrored surface of the molten tin and spreads over it and turns into a tape of equilibrium thickness. The molded glass tape further advances along the surface of the tin, gradually cools (up to 600 ° C) and is transferred to the annealing furnace.

The closest analogue of the proposed technical solution is a continuous continuous line for the production of building polished glass, known from "PRODUCTION OF GLASS", V.V. Tarbeev and others, FGUIPP "Nizhpolygraph", Nizhny Novgorod, 2002, pp. 136-138. The known line includes a bathroom glass melting furnace, including a loading pocket with charge loaders, a cooking section, a pinch, a studio section, a production channel, and a float bath.

From the glass melting furnace through the feed channel, the molten glass enters the float bath, where it is converted into a glass ribbon and through the lifting shafts from the other end of the bath it enters the annealing furnace and then to the rolling table. The moving belt undergoes visual inspection of defects and annealing control. Then, at the cross-cutting section, the tape is divided into blanks entering the cutting section. According to a special program, glass sheets are automatically fed from the rolling table to carved tables, where they are cut into semi-finished products and are automatically installed on the pyramids,

which are then transported by forklift trucks to the warehouse. Defective billets, battle are dumped in the bunker or in special containers for the battle. The productivity of all production line equipment is determined by the cooking ability of the glass melting furnace.

Among the shortcomings, it can be noted that the unmelted charge in the cooking pool of the glass melting furnace extends to the side towards its side walls, accumulates in the latter, clogs the passage for both entering the charge into the cooking pool, and the outlet from it, moreover, the interaction of the charge with the lining of the furnace leads to its destruction and thereby reduces the service life of the glass melting furnace, which in turn leads to a decrease in line productivity; in addition, this technical solution does not provide for the possibility of controlling the circulation flows of the glass melt in the longitudinal and cross sections of the bathtub of the glass melting furnace, which does not ensure uniformity of the glass melt in temperature and chemical composition when it enters the production channel of the glass melting furnace, and also does not allow moving the charge from the side walls of a glass melting furnace.

Utility Model Disclosure

The objective of the proposed technical solution is to provide the ability to control temperature fields, as well as longitudinal and transverse convection flows of molten glass in a glass melting furnace, and to regulate the location of the mixture over the area of the glass melting furnace, stabilizing the position of the boundaries of the mixture at the required distance from the side walls, ensuring the uniformity of the glass mass mainly due to chemical as well as thermal averaging. The solution to this problem will improve the quality and increase the number of products produced, as well as extend the life of the line for the production of sheet polished glass.

The problem is solved in that in a line for the production of sheet polished glass containing a glass melting bathtub,

comprising a loading pocket with charge loaders, a cooking part, a pinch, a studio part and a production channel, a float bath, according to a utility model, the cooking part includes a heated zone and a condensation zone, the glass melting furnace is equipped with a water-cooled element containing fastening and cooling sections connected by a transition section and placed along the longitudinal axis of the specified furnace perpendicular to the end wall of the loading pocket between the charge loaders, the ratio of the area of the heated cooking zone of the second part to the area of the refrigerating section of the water-cooled element is selected from the ratio 1: (0.013-0.038), two water-cooled mixers are installed in the pinch, mounted towards each other and perpendicular to the side walls of the pinch, and made in the form of a pipe with water-cooled U-shaped blades, while the ratio the clamping area of the glass melting furnace to the area of the water-cooled surface of the mixer blades is selected from the range 1: (0.026-0.036), and the glass melting furnace is additionally equipped with two water-cooling elements perpendicular to the end wall of the loading pocket, located in close proximity to the side walls of the glass melting furnace, in addition, water-cooled mixers are installed with the possibility of reciprocating motion.

As a result, the quality of building glass is improved and the service life of the line is increased, and it was experimentally established that the selected above ranges improve the uniformity of the glass melt and protect the lining of the glass melting furnace.

Based on the calculated and experimental data obtained during modeling and research of temperature fields and flows of glass melt, glass of the required quality can be obtained under the following conditions:

- the width of the loading pocket of the glass melting furnace refers to the length of the loading pocket, as 1: (0.22-0.26);

- the width of the cooking part of the glass melting furnace refers to the length of the cooking part of the glass melting furnace, as 1: (3.4-3.8);

- the pinch width of the glass furnace relates to the pinch length of the glass furnace, as 1: (1.10-1.50);

- the width of the student part of the furnace refers to the length of the student part of the glass melting furnace, as 1: (1.80-2.20);

- the width of the production channel of the glass melting furnace refers to the length of the production channel, as 1: (1.26-1.67);

- the total surface area of the mirror of the glass melting furnace refers to the area of the loading pocket of the glass melting furnace, as 1: (0.03-0.04);

- the total surface area of the mirror of the glass melting furnace refers to the area of the cooking part of the glass melting furnace, as 1: (0.60-0.70);

- the total surface area of the mirror of the glass melting furnace refers to the area of the heated zone of the glass melting furnace, as 1: (0.46-0.52);

- the total surface area of the mirror of the glass melting furnace refers to the area of the condensation zone of the glass melting furnace, as 1: (0.20-0.26);

- the total surface area of the mirror of the glass melting furnace refers to the clamping area of the glass melting furnace, as 1: (0,053-0,063);

- the total surface area of the mirror of the glass melting furnace refers to the area of the student part of the glass melting furnace, as 1: (0.24-0.30);

- the total surface area of the mirror of the glass melting furnace refers to the area of the production channel of the glass melting furnace, as 1: (0,010-0,014).

Brief Description of the Drawings

The technical solution is illustrated by drawings, where Fig. 1 shows a plan of a line for the production of polished glass sheets, Fig. 2 shows a top view of a glass melting furnace bath, Fig. 3 a longitudinal section of a glass melting furnace bath, and Fig. 4 a longitudinal section of a bath

5 glass furnace with circulating flows of molten glass, figure 5 is a cross section of pinch bath glass furnace.

The line for the production of sheet polished glass will include: (see figure 1) 1 - charge loaders (4 pcs.), 2 - loading pocket, 3 - bathroom glass melting furnace, 4 - arched refrigerator, 5 - production channel, 6 - burners (6 pairs), 7 - regenerators (6 pairs), 8 - a refrigerator in the pinch of the furnace, 9 - a float bath, 10 - a water-cooled element (on-board refrigerator) 1 pair, 11 - a water-cooled element (axial refrigerator), 12 - mechanism thinning of a glass ribbon, 13 - a glass melt mixer (1 pair), 14 - a slag chamber, 15 - annealing furnace, 16 - scanner, 18 - lowering section, 19 - cullet hopper , 20 - a tape cutting command apparatus, 21 - a longitudinal cutting beam (2 pcs.), 22 - a live roll, 23 - transverse cutting (2 pcs.), 24 - a fragmentation shaft, 25 - a breakage board section, 26 - a lowering section, 27 - crusher, 28 - rotator, 29 - installation of blowing glass, 30 - installation of powder application, 31 - stacker vertical (2 pcs.), 32 - stacker horizontal (2 pcs.), 33 - section of wing-breaking, 34 - installation of blowing glass, 35 - powder application, 36 - cutter table, 37 - stacker, 38 - cutter table.

Bathroom glass melting furnace 3 includes (see Fig. 2) a loading pocket - 2, four charge loaders - 1 continuous operation, a cooking part consisting of a heated zone and a condensation zone (not shown in the drawings), pinch 39 (see figure 5), the student part (not shown in the drawings) and the development channel 5 (figure 1).

Bathroom glass melting furnace 3 is equipped with a water-cooled element (axial refrigerator) 11 (Fig. 3), containing a fastening 11a and a refrigerating section 11c, connected by a transition section 11b and placed along the longitudinal axis of the furnace perpendicular to the end wall of the loading pocket 2 between the charge loaders 1.

The pinch 39 of the glass melting furnace 3 is equipped with two glass melt mixers 13. The mixers 13 are mounted towards each other and perpendicular to the side walls of the pinch 39, made in the form of a pipe with

three water-cooled blades 40 (figure 5) and made with the possibility of reciprocating motion.

The bathroom glass melting furnace 3 is equipped with two water-cooled elements 10 (on-board refrigerators), see figure 2 made perpendicular to the end of the wall of the loading pocket 2 in the immediate vicinity of the side walls of the bathroom glass melting furnace 3.

Utility Model Implementation

The line for the production of sheet polished glass works as follows.

The mixture is loaded into the bathroom glass melting furnace 3 through the loading pocket 2, is melted in the cooking pool of the bathroom glass melting furnace 3, forming a glass mass 41 (figure 4). Glass melt 41 continuously moves under the influence of generation and thermal convection. By lowering the temperature of the glass melt 41 along the longitudinal axis of the bathroom of the glass melting furnace 3 below the temperatures established at the side walls, the water-cooled element (axial refrigerator) 11 and the on-board refrigerator 10 redistribute the circulation flows of the glass melt 41, directing them from the side walls of the glass melting furnace 3 to the longitudinal axis - the center glass melting furnace 3, figure 4 shows the flow of molten glass in a longitudinal section of the glass melting furnace 3. The mixture floating on the surface of the molten glass 41, moves these sweat okam some distance from the side walls of the bathroom glass melting furnace 3 to its center.

In order to intensify the process of the molten glass mill 41, two mixers 13 of the molten glass 41 are installed over the entire width of the pinch 39. Water-cooled mixers 13 reduce the temperature of the molten glass 41 not only due to cooling, but also because of their inhibitory effect on the circulation of the molten glass 41. It should be noted that the mixers 13 are not only serve as a water-cooled barrier, but also essential

way affect the uniformity of the glass melt 41 mainly due to chemical as well as thermal averaging.

After the production channel 5, the molten glass enters the float bath 9. A strictly metered amount of the molten glass 41 flows onto the mirror surface of the molten tin and, spreading over it, turns into a ribbon of equilibrium thickness. The molded glass tape further advances along the tin surface, gradually cools (up to 600 ° C) and is fed to the annealing furnace 15. The moving glass tape passes through 8 thermal zones and exits cooled to 60 ° C with an internal voltage within the permissible limits.

After the annealing furnace 15, the glass tape enters the roller conveyor of the terminal operations 22, and the scanner 16 detects defects in the glass and issues a task to cut the glass tape into sheets. The glass tape passes under the beams of longitudinal 21 and transverse cutting 23, while longitudinal and transverse cuts are made on the glass. The breaking shaft 24 breaks off the notched sheet and it enters the side-breaking section 25 on the accelerating roller table, where the notched sides break off with the lowering rollers. With poor-quality breaking of the sheet, glass with defects is sent to the crusher 27 by the lowering section 26 and turns into a cullet. A sheet of glass of size (2250 × 3210) unfolds on a rotator 28 through 90 ° and is sent along the roller conveyor to the stackers with preliminary blowing of the sheets with the help of blowing the glass 29 and spraying the protective powder using the powder application unit 30. The glass is removed on four stackers: two vertical 31 and two horizontal 32, a sheet of glass of size (3210 × 6000) does not unfold on the rotator 28 and the sides do not break off. The flashing of the sides of the JS glass sheet takes place on a separate additional section of the side wall 33. The glass sheet with preliminary blowing of the sheets by installing a glass blowing unit 34 and the protective powder is sprayed using the powder spraying unit 35 goes to the glass stacker 37. When determining local defects in the glass sheet, it is sent on the table

a cut 36 for glass (2250 × 3210) and a cut table 38 for glass (3210 × 6000) to separate high-quality glass from low-quality.

The application of the invention allows to increase the service life of the glass melting furnace, to improve the quality of products produced, to increase the production of glass.

Claims (2)

1. A line for the production of flat polished glass containing a glass melting furnace, including a loading pocket with charge loaders, a cooking part, a pinch, a studio part and a production channel, a float bath, characterized in that the cooking part includes a heated zone and a condensation zone, a bathroom the glass melting furnace is equipped with a water-cooled element containing mounting and refrigerating sections connected by a transition section and placed along the longitudinal axis of the furnace perpendicular to the end wall of the bar a narrow pocket between the charge loaders, and the ratio of the area of the heated cooking zone to the area of the refrigerating section of the water-cooled element is selected from a ratio of 1: (0.013-0.038), two water-cooled mixers are placed in the clamp, mounted towards each other and perpendicular to the side walls of the clamp, and made in in the form of a pipe with water-cooled U-shaped blades, while the ratio of the pinch area of the glass furnace to the area of the water-cooled surface of the mixer blades is selected from the range 1: (0.026-0.036), and glass the boiled furnace is additionally equipped with two water-cooled elements perpendicular to the end of the wall of the loading pocket, located in the immediate vicinity of the side walls of the glass melting furnace. 2. The line according to claim 1, characterized in that the water-cooled mixers are installed with the possibility of reciprocating motion.