CN213950952U

CN213950952U - Kiln for improving melting quality of molten glass

Info

Publication number: CN213950952U
Application number: CN202023018020.1U
Authority: CN
Inventors: 方长应; 沈培军; 严育仓
Original assignee: Jushi Group Co Ltd
Current assignee: Jushi Group Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-13
Anticipated expiration: 2030-12-15

Abstract

The utility model provides a kiln for improving the melting quality of glass liquid, which comprises a kiln body, a breast wall positioned above the kiln body, an arch top positioned at the top of the breast wall, a boss arranged at the bottom of the kiln body and a plurality of bubbling pipes, wherein the boss is perpendicular to the glass liquid flow direction in the kiln body, and two ends of the boss are hermetically connected with the side wall of the kiln body; the bubbling pipes longitudinally penetrate through the bottom of the kiln body and the lug boss, and the bubbling pipes are arranged at equal intervals. Use the utility model discloses a kiln can effectively avoid the bottom to contain the glass liquid of impurity to flow into in a large number the clarification district and the glass fiber quality defect that leads to, effectively promotes the homogenization effect of glass liquid, improves glass liquid melting quality and glass fiber quality, prolongs the life of kiln.

Description

Kiln for improving melting quality of molten glass

Technical Field

The utility model relates to a glass fiber production technical field especially relates to a promote kiln of glass liquid founding quality.

Background

In the production process of glass fibers, generally, the quality of the molten glass at the middle layer position in a glass kiln is the best, and the prepared glass fibers have the best quality because the viscosity and the fluidity of the molten glass at the position are moderate and the impurity content is less; the bottom glass liquid is not beneficial to producing glass fiber due to lower temperature and higher viscosity, and is contacted with the corrosion-resistant material at the bottom of the kiln for a long time, so that impurities are easily introduced to cause the quality defect of a glass fiber product; the surface layer glass liquid positioned at the top is easy to cause unstable quality of glass fiber products due to more bubbles, higher temperature and lower viscosity.

There are two common methods for improving the quality of molten glass in the industry: the first is to arrange the weir at the bottom of the kiln, the weir height generally exceeds the depth of the molten glass by half in the present common kiln, although this kind of weir can support the bottom glass liquid, reduces the problem that the bottom glass liquid flows into the clarification zone and introduces impurity, but can lead to the surface glass liquid velocity of flow too fast, and the whole residence time of molten glass in the kiln is short, leads to the not good superficial glass liquid of a large amount of melting quality to flow into the clarification zone, is unfavorable for the stability and promotion of molten glass quality. In addition, because the existing weir material has low corrosion resistance, the erosion speed is high in the process of soaking in high-temperature molten glass for a long time, 1/3 can be eroded in 2 years basically, and the weir loses due functions.

The second method is that two rows of bubbling pipes are arranged at the bottom of the kiln, the first row plays a role of a material blocking line, and the flowing of the glass metal is accelerated by bubbling so as to achieve the purpose of promoting the backflow of the glass metal; the second row has homogenization effect, and the purpose is to turn up the glass liquid at the bottom layer and mix the glass liquid with the glass liquid at the middle layer and the surface layer, thereby achieving the effect of homogenizing the glass liquid. The arrangement can turn over the molten glass containing impurities at the bottom layer, so that the molten glass with poor quality and the impurities in the molten glass enter the clarification area and the forming channel, and the product quality is reduced. With most kilns adopting the electric boosting technology, only the rear row of bubbling pipes are left, and the structure can not block bottom glass liquid, but can turn up impurities in the bottom glass liquid to flow into a clarification area and a forming channel.

Disclosure of Invention

The present invention aims to solve the above-described problems. It is an object of the present invention to provide a kiln that solves any of the above problems. Specifically, the utility model provides a can avoid bottom impurity to get into clarification district, promote glass liquid melting quality and glass fiber quality, extension kiln life's kiln.

In order to achieve the purpose, the utility model provides a kiln for improving the melting quality of molten glass, which comprises a kiln body, a breast wall positioned above the kiln body, an arch top positioned at the top of the breast wall, a boss arranged at the bottom of the kiln body and a plurality of bubbling pipes, wherein the boss is perpendicular to the flow direction of the molten glass in the kiln body, and two ends of the boss are hermetically connected with the side wall of the kiln body; the bubbling pipes longitudinally penetrate through the bottom of the kiln body and the lug boss, and the bubbling pipes are arranged at equal intervals.

The furnace also comprises a burner, wherein the burner is arranged on the arch top and/or the breast wall and is used for heating surface glass liquid in the furnace body.

Wherein the burners comprise an arch top burner and/or a horizontal burner.

Wherein the horizontal distance between the burner and the boss along the glass melt flow direction is-2000 mm.

Wherein, the boss is located between melting district and the clarification district in the kiln body.

Wherein the height of the boss is 0.1-0.3 times of the depth of the molten glass in the kiln body.

Wherein the width of the boss along the glass liquid flow direction is 400-2000 mm.

Wherein, the vertical distance between the outlet of the bubbling pipe and the upper surface of the boss is 20-100 mm.

Wherein, the surfaces of the lug boss and the bubbling tube are coated with platinum-rhodium alloy layers.

The kiln of the utility model can effectively avoid the quality defect of glass fiber caused by the fact that the glass liquid containing impurities at the bottom layer flows into the clarification zone in large quantity, effectively improve the homogenization effect of the glass liquid, improve the melting quality of the glass liquid and the quality of the glass fiber, and prolong the service life of the kiln; meanwhile, the glass liquid melting quality can be improved, the blocking condition of the bushing plate can be effectively reduced, the wire drawing smoothness is improved, and the glass fiber production efficiency is improved.

Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Fig. 1 schematically shows a lateral internal structural view of a kiln according to the invention;

fig. 2 schematically shows a longitudinal internal structural view of the kiln of the invention;

fig. 3 schematically shows an interior overhead view of the kiln of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The invention is to prevent the glass liquid containing impurities at the bottom layer from being turned over and entering the clarification zone, and a boss which penetrates through the transverse direction of the furnace is arranged between the melting zone and the clarification zone at the bottom of the furnace to prevent the glass liquid at the bottom layer from entering the clarification zone, so that the impurities are prevented from entering the subsequent production along with the glass liquid, and the probability of blockage of a bushing due to the impurities is effectively reduced; simultaneously for promoting the homogenization effect of surface layer glass liquid and middle layer glass liquid, avoid the too fast stability that influences the glass fiber quality of surface layer glass liquid velocity of flow, set up the bubbling pipe that runs through the boss perpendicularly on the boss for from the middle level of glass liquid to the top layer tympanic bulla, in order to guarantee the abundant homogenization of surface layer glass liquid and middle layer glass liquid, guarantee the stability of the glass liquid temperature and the quality that gets into the clarification district, and then promote the stability of glass fiber quality. In addition, in order to further reduce the temperature difference between the surface layer glass melt and the middle layer glass melt and improve the melting quality of the glass melt, a burner can be arranged in the furnace, for example, an arch top burner which is contacted with the surface layer glass melt is arranged on an arch top, and a horizontal burner can be arranged above the glass melt, so that the temperature of the surface layer glass melt is fully improved, and the stability of the temperature and the quality of the glass melt entering a clarification area is ensured.

The following describes in detail the kiln for improving the melting quality of molten glass according to the present invention with reference to the accompanying drawings.

The utility model discloses a kiln can effectively promote glass liquid melting quality to reach the purpose that promotes glass fiber product quality. Fig. 1 shows the side direction internal structure schematic diagram of a specific embodiment of the kiln of the present invention, fig. 2 shows the longitudinal internal structure schematic diagram of another specific embodiment of the kiln, and fig. 1 and fig. 2 are comprehensively referred to, the kiln comprises a kiln body 1, a breast wall 2 located above the kiln body 1, and an arch top 3 located at the top of the breast wall 2, and glass is melted in the kiln body 1 to become molten glass.

The molten glass has certain difference in the flowing process, the bottom layer contains a large amount of impurities, the temperature of the surface layer is diffused quickly and the temperature is slightly lower than that of the middle-layer glass liquid, the flow rate of the surface-layer glass liquid is higher than that of the middle-layer glass liquid, the impurities can affect the quality of glass fibers, the homogenizing effect of the glass liquid is poor, and the instability of the temperature and the quality can also seriously affect the quality of the glass fibers. In order to avoid impurities from entering the subsequent process to influence the quality of glass fibers, the kiln further comprises a boss 4 and a plurality of bubbling pipes 5, wherein the boss 4 and the bubbling pipes 5 are arranged at the bottom of the kiln body 1, the boss 4 is used for blocking bottom glass liquid containing a large amount of impurities, and the bubbling pipes 5 are used for improving the homogenization effect of surface glass liquid and middle glass liquid and further improving the stability of the quality of the glass liquid entering the subsequent process. Wherein, the glass liquid flow direction setting in the boss 4 perpendicular to kiln body 1 to the both ends of boss 4 and the lateral wall sealing connection of kiln body 1, in order fully to guarantee the boss 4 to the effect of blockking of the bottom glass liquid that contains impurity, avoid the bushing to take place to block up at the wire drawing in-process, guarantee glass fiber's production quality simultaneously. The bubbling pipe 5 longitudinally penetrates through the bottom of the kiln body 1 and the boss 4, bubbles the surface glass liquid from the middle glass liquid, and turns the middle glass liquid upwards to mix the glass liquid with the surface glass liquid fully, so that the homogenization quality of the glass liquid is improved.

Specifically, a plurality of bubbling pipes 5 are arranged at equal intervals to fully ensure that the homogenization degree of the middle layer and the surface layer of all the molten glass in the width direction of the kiln is equal, and further improve the melting quality of the molten glass. Illustratively, the interval between the adjacent bubbling tubes 5 can be set to be 20-50 mm, the interval between the bubbling tube 5 close to the end of the boss 4 and the side wall of the kiln body 1 can be 40-80 mm, and a large number of experiments by the inventor prove that under the interval setting, bubbles blown into the bubbling tubes 5 can maximize the homogenizing effect on the surface layer glass liquid and the middle layer glass liquid on the premise of not causing the upwelling of the bottom layer glass liquid.

Furthermore, the temperature difference between the surface layer glass liquid and the middle layer glass liquid can be reduced by increasing the temperature of the surface layer glass liquid, so that the stability of the melting quality of the glass liquid is further improved. In an alternative embodiment, the furnace further comprises a burner 6, and the burner 6 is arranged on the arch crown 3 and/or the breast wall 2 and is used for heating surface molten glass in the furnace body 1.

Illustratively, the burners 6 may include one or more crown burners 61 fixed to the crown 3 and suspended from the surface molten glass, one or more horizontal burners 62 fixed to the breast wall 2 and suspended above the molten glass, and both the crown burners 61 and the horizontal burners 62.

In an alternative embodiment, the horizontal distance between the burner 6 and the boss 4 in the glass flow direction is-2000 to 2000 mm. For example, the burner 6 may be disposed before the projection 4 in the glass flow direction, may be disposed after the projection 4 in the glass flow direction, or may be disposed so as to be suspended above the projection 4. In the embodiment shown in fig. 1, the burner 6 comprises a crown burner 61 and a horizontal burner 62, the crown burner 61 and the horizontal burner 62 are respectively arranged on different sides of the boss, and can sufficiently heat the surface layer glass melt in front of and behind the boss 4, so as to ensure that the temperature areas of the surface layer glass melt and the middle layer glass melt are consistent, improve the melting quality of the glass melt, and further improve the quality of glass fibers.

Fig. 3 shows a schematic view of the internal layout in an embodiment of the furnace of the present invention, and with reference to fig. 1 and 3, in the glass melting furnace for producing glass fiber, the furnace body is divided into three zones, namely, a raw material zone, a melting zone and a clarifying zone, along the glass liquid flow direction. The utility model discloses an in the kiln, preferably, boss 4 is located between the melting district and the clarification district of kiln body 1 to the glass liquid that stops to melt the district bottom and contain impurity to the at utmost gets into the clarification district, and simultaneously, the bubble that 5 bloies of bubbling pipe on the boss 4 are gone into can not cause the billowing to the glass liquid of bottom, can effectively guarantee the glass liquid quality in clarification district, thereby promotes the glass liquid quality that gets into in the wire drawing procedure. Illustratively, the position of the boss 4 can be 0.5-0.8 times the length of the furnace body 1 along the flowing direction of the molten glass.

In an alternative embodiment, the height of the boss 4 is 0.1-0.3 times the depth of the molten glass in the furnace body 1. Compare with the weir among the conventional art, boss 4 in this scheme highly lower, can effectively block bottom glass liquid, reduce bottom glass liquid and get into the clarification district and introduce the risk of impurity, can not lead to the surperficial glass liquid velocity of flow too fast again and let the problem that founding the not good top layer glass liquid of quality gets into the clarification district appear, effectively promote the stability of glass liquid founding quality.

The utility model discloses an among the kiln structure, boss 4 is 400 ~ 2000mm along the width of glass liquid flow direction. Compared with the weir of the traditional kiln, the boss 4 in the scheme is a platform with wider width, so that the service life is longer, and the influence on the flow rate of surface glass liquid is further reduced.

In some preferred embodiments, the vertical distance between the outlet of the bubbler tube 5 and the upper surface of the boss 4 is 20-100 mm. A large number of tests of the inventor prove that when the outlet at the upper end of the bubbling tube 5 is 20-100 mm higher than the upper surface of the boss 4, the bubbles blown into the bubbling tube 5 have minimum disturbance on the bottom glass liquid, and the homogenization effect on the surface layer glass liquid and the middle layer glass liquid is ideal.

In an optional embodiment, the surfaces of the boss 4 and the bubbling tube 5 are coated with platinum-rhodium alloy layers, so that the corrosion degree of glass liquid to the bubbling tube 5 and the boss 4 can be effectively reduced, the service lives of the bubbling tube 5 and the boss 4 can be prolonged, and the service life of the kiln can be further prolonged.

The above-described embodiments can be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The kiln for improving the melting quality of molten glass is characterized by comprising a kiln body (1), a breast wall (2) positioned above the kiln body (1), an arch top (3) positioned at the top of the breast wall (2), a boss (4) arranged at the bottom of the kiln body (1) and a plurality of bubbling pipes (5), wherein the boss (4) is perpendicular to the flow direction of the molten glass in the kiln body (1), and two ends of the boss (4) are hermetically connected with the side wall of the kiln body (1); the bubbling pipes (5) longitudinally penetrate through the bottom of the kiln body (1) and the bosses (4), and the bubbling pipes (5) are arranged at equal intervals.

2. The furnace according to claim 1, further comprising burners (6), said burners (6) being arranged on said crown (3) and/or said breast wall (2) for heating the surface molten glass inside said furnace body (1).

3. The kiln according to claim 2, characterized in that the burners (6) comprise arch burners (61) and/or horizontal burners (62).

4. The furnace according to claim 2, wherein the horizontal distance between the burner (6) and the boss (4) in the direction of the molten glass flow is-2000 to 2000 mm.

5. The kiln according to claim 1, characterized in that the boss (4) is located in the kiln body (1) between the melting zone and the fining zone.

6. The furnace according to claim 1, characterized in that the height of the bosses (4) is 0.1-0.3 times the depth of the molten glass in the furnace body (1).

7. The furnace according to claim 1, wherein the width of the boss (4) in the molten glass flow direction is 400-2000 mm.

8. The kiln according to claim 1, characterized in that the vertical distance between the outlet of the bubbling tube (5) and the upper surface of the boss (4) is 20-100 mm.

9. The kiln according to claim 1, characterized in that the surfaces of the bosses (4) and of the bubbling tubes (5) are coated with a platinum-rhodium alloy layer.