阅读说明：本技术 浮法玻璃熔窑及浮法玻璃生产线 (Float glass melting furnace and float glass production line ) 是由 王杏娟 薛建鹏 易节化 曾伟平 于 2020-11-27 设计创作，主要内容包括：本发明提供一种浮法玻璃熔窑,包括熔化部、主线冷却部、第一支线冷却部和第二支线冷却部。主线冷却部与熔化部通过卡脖连通,主线冷却部的两侧分别连通有第一横向通路和第二横向通路。第一支线冷却部和第二支线冷却部分别设于主线冷却部的两侧,第一支线冷却部连通于第一横向通路,第二支线冷却部连通于第二横向通路。本发明还提供包括该浮法玻璃熔窑的浮法玻璃生产线。该浮法玻璃熔窑通过合理分配主线冷却部和支线冷却部的拉引量,减少主线冷却部玻璃液的拉引量,从而达到主线冷却部能够生产薄玻璃的目的,同时有效加大了支线冷却部玻璃液的对流量,从而满足支线冷却部玻璃液的成型温度。(The invention provides a float glass melting furnace, which comprises a melting part, a main line cooling part, a first branch line cooling part and a second branch line cooling part. The main line cooling part is communicated with the melting part through a clamping neck, and a first transverse passage and a second transverse passage are respectively communicated with two sides of the main line cooling part. The first branch line cooling part and the second branch line cooling part are respectively arranged at two sides of the main line cooling part, the first branch line cooling part is communicated with the first transverse passage, and the second branch line cooling part is communicated with the second transverse passage. The invention also provides a float glass production line comprising the float glass melting furnace. According to the float glass melting furnace, the drawing amount of the main line cooling part and the branch line cooling part is reasonably distributed, and the drawing amount of molten glass in the main line cooling part is reduced, so that the aim that the main line cooling part can produce thin glass is fulfilled, the convection quantity of the molten glass in the branch line cooling part is effectively increased, and the forming temperature of the molten glass in the branch line cooling part is met.)

1. A float glass melter comprising:

a melting section;

a main line cooling part communicated with the melting part through a neck, wherein a first transverse passage and a second transverse passage are respectively communicated with two sides of the main line cooling part; and the number of the first and second groups,

and the first branch line cooling part and the second branch line cooling part are respectively arranged at two sides of the main line cooling part, the first branch line cooling part is communicated with the first transverse passage, and the second branch line cooling part is communicated with the second transverse passage.

2. The float glass melter of claim 1, wherein the first transverse passage and the second transverse passage are both in communication with a front half of the main line cooling section.

3. The float glass melter of claim 1, wherein the area of the first branch line cooling section and the area of the second branch line cooling section are both smaller than the area of the main line cooling section.

4. The float glass melting furnace according to claim 1, wherein a connection port of the neck portion connected to the main line cooling portion is formed in a shape of a flare toward the main line cooling portion.

5. The float glass melter of any of claims 1-4, wherein a central axis of the melting section coincides with a central axis of the main line cooling section.

6. The float glass melter of claim 5, wherein a central axis of the first transverse passage and a central axis of the second transverse passage are perpendicular to a central axis of the main line cooling portion.

7. The float glass melter of claim 6 wherein the central axis of the first transverse passage coincides with the central axis of the second transverse passage.

8. The float glass melter of claim 7 wherein a central axis of the first leg cooling portion is perpendicular to a central axis of the first transverse passage; the central axis of the second branch line cooling part is perpendicular to the central axis of the second transverse passage.

9. The float glass melting furnace according to claim 8, wherein a distance between a central axis of the first branch line cooling part and a central axis of the main line cooling part and a distance between a central axis of the second branch line cooling part and a central axis of the main line cooling part are each in a range of 15 to 22 m.

10. A float glass production line, comprising:

the float glass furnace of any one of claims 1 to 9; and the number of the first and second groups,

and the tin bath is communicated with the float glass melting furnace.

Technical Field

The invention relates to the technical field of float glass production, in particular to a float glass melting furnace and a float glass production line.

Background

In the prior art, a float glass production line generally adopts a "one-line-one-kiln" structure, that is, a kiln is matched with one glass production line (one melting furnace is connected with one tin bath), as shown in fig. 1, the kiln only comprises a melting part 100 ' and a cooling part 300 ', and also comprises a neck 200 ', a small furnace 110 ', a regenerator 120 ' and the like. The melting furnace has certain limitation in actual production, and particularly, the large-tonnage melting furnace cannot produce thin glass, so that the operation variety and the operation benefit of enterprises are adversely affected.

Disclosure of Invention

The invention mainly aims to provide a float glass melting furnace, and aims to solve the technical problem that a large-tonnage float glass melting furnace cannot produce thin glass.

To achieve the above object, the present invention provides a float glass melting furnace comprising:

a melting section;

a main line cooling part communicated with the melting part through a neck, wherein a first transverse passage and a second transverse passage are respectively communicated with two sides of the main line cooling part; and the number of the first and second groups,

and the first branch line cooling part and the second branch line cooling part are respectively arranged at two sides of the main line cooling part, the first branch line cooling part is communicated with the first transverse passage, and the second branch line cooling part is communicated with the second transverse passage.

Optionally, the first and second transverse passages are both in communication with a first half of the main line cooling portion.

Optionally, the area of the first branch line cooling part and the area of the second branch line cooling part are both smaller than the area of the main line cooling part.

Optionally, a connection port of the neck and the main line cooling portion is flared toward the main line cooling portion.

Optionally, the central axis of the melting section coincides with the central axis of the main line cooling section.

Optionally, the central axis of the first transverse passage and the central axis of the second transverse passage are perpendicular to the central axis of the main line cooling portion.

Optionally, the central axis of the first transverse passage coincides with the central axis of the second transverse passage.

Optionally, a central axis of the first wire cooling portion is perpendicular to a central axis of the first transverse passage; the central axis of the second branch line cooling part is perpendicular to the central axis of the second transverse passage.

Optionally, a distance range between the central axis of the first branch line cooling part and the central axis of the main line cooling part and a distance range between the central axis of the second branch line cooling part and the central axis of the main line cooling part are both 15-22 m.

The present invention also provides a float glass production line comprising:

the float glass melting furnace described above; and the number of the first and second groups,

and the tin bath is communicated with the float glass melting furnace.

The invention provides a float glass melting furnace, which forms a novel one-furnace three-line float glass melting furnace by adding transverse passages at two sides and branch cooling parts at two sides of a main line cooling part, wherein the float glass melting furnace reduces the drawing amount of molten glass in the main line cooling part by reasonably distributing the drawing amounts of the main line cooling part and the branch cooling part, thereby achieving the purpose that the main line cooling part can produce thin glass, and effectively increasing the convection of the molten glass in the branch cooling part, thereby meeting the forming temperature of the molten glass in the branch cooling part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of a prior art "one-in-one-line" configuration of a float glass melting furnace;

FIG. 2 is a schematic view of a float glass furnace according to an embodiment of the present invention;

FIG. 3 is a schematic view of a portion of the structure of the float glass furnace of FIG. 2.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100′	Melting part	110′	Small stove
120′	Regenerative chamber	200′	Neck clip
				300′	Cooling part	100	Melting part
200	Neck clip	300	Main line cooling part
				400	First transverse passage	500	Second transverse passage
600	First branch line cooling part	700	Second branch line cooling part

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The embodiment of the invention provides a float glass melting furnace.

In one embodiment of the present invention, as shown in fig. 2 and 3, the float glass melting furnace includes:

a melting section 100;

a main line cooling part 300, wherein the main line cooling part 300 is communicated with the melting part 100 through a neck 200, and a first transverse passage 400 and a second transverse passage 500 are respectively communicated with two sides of the main line cooling part 300; and the number of the first and second groups,

a first branch line cooling part 600 and a second branch line cooling part 700 respectively provided at both sides of the main line cooling part 300, the first branch line cooling part 600 communicating with the first transverse passage 400, and the second branch line cooling part 700 communicating with the second transverse passage 500.

It should be noted that float glass is so named that molten glass floats on the surface of molten metal and is polished and shaped, and molten glass continuously flows into a furnace filled with a protective gas (N)₂And H₂) The tin bath floats on the liquid surface of the metallic tin, and the glass of the glass belt with uniform thickness, parallel two surfaces, flatness and polishing is formed by flattening and polishing, which is one of plate glass (plate silicate). The melting process of the float glass is one of the main stages in the manufacturing process of the float glass, namely the process of heating qualified batch at high temperature to form uniform, pure and transparent glass liquid which meets the forming requirement. The melting furnace is the place where the float glass melting process occurs. Specifically, the glass melting process can be summarized into the following stages: silicate forming stage-molten glass clarifying stage-molten glass homogenizing stage-molten glass cooling stage.

The existing one-kiln one-line float glass melting furnace has certain limitation in practical production, and particularly, a large-tonnage melting furnace cannot produce thin glass, namely, when the daily drawing amount of the melting furnace is large, a cooling part of the melting furnace cannot produce the thin glass. Wherein, the technical formula of the daily drawing amount of the melting furnace is as follows:

daily drawing amount is drawing speed × average sheet width × average thickness × 24 × 2.5

Wherein the daily drawing amount-the weight of glass liquid drawn every day and night is t;

drawing speed-the length of the glass original plate in unit time, and the unit is m/h;

average sheet width-the average width of the glass raw sheet in production, in units of m;

average thickness-the average thickness of the glass raw sheet in production, in m;

24-hours per day and night in units of h;

2.5-density of the molten glass, unit t/m³。

From the above formula, it can be understood that when the daily draw amount of the float glass melting furnace is large and the area of the cooling part is constant, the average thickness of the glass base plate is increased. Therefore, the large-tonnage melting furnace cannot produce thin glass, and the operation variety and the operation benefit of enterprises are adversely affected.

On the basis of the traditional large-tonnage one-kiln one-line float glass melting furnace, the technical scheme of the embodiment forms a new one-kiln three-line float glass melting furnace by adding transverse passages at two sides and branch cooling parts at two sides of the main line cooling part 300. The drawing amount of the molten glass of the main line cooling part 300 and the branch line cooling part is reasonably distributed, so that the drawing amount of the molten glass of the main line cooling part 300 is reduced, the aim of producing thin glass by the main line is fulfilled, and meanwhile, the forming temperature of the molten glass of the branch line cooling part can be met by increasing the convection amount of the molten glass of the branch line cooling part.

It can be understood that the main line is designed as a thin glass production line, and the residence time of the molten glass in the main line cooling part 300 is long due to the small drawing amount, so that good clarifying and homogenizing effects of the molten glass can be achieved, and the forming quality of the thin glass in the main line cooling part 300 is improved. In addition, the initial forming temperature of the molten glass is generally about 1050 ℃, and because a transverse passage is additionally arranged between the branch cooling part and the main cooling part 300, when the molten glass in the branch cooling part passes through the transverse passage, the heat dissipation amount of the molten glass naturally cooled is increased, and the forming temperature of the molten glass at the outlet of the branch cooling part is low, so that the heat conduction of the molten glass in the branch cooling part is increased by increasing the convection amount of the molten glass in the branch cooling part, and finally the forming temperature of the molten glass in the branch cooling part is met.

In the technical scheme of the embodiment, the main line cooling part is used for producing thin glass, and the branch line cooling parts on two sides are used for producing glass with conventional thickness. Whether the main line or the branch line can produce thin glass is mainly determined by the amount of drawing of the main line and the branch line and the temperature of the forming process of the molten glass in the main line cooling section 300 and the branch line cooling section. The main line is designed into a thin glass production line, because the drawing amount of the main line cooling part 300 is small, the convection flow of the glass liquid of the main line cooling part 300 is reduced, the clarification, homogenization and cooling effects of the glass liquid of the main line cooling part 300 are facilitated, and the convection flow of the glass liquid of the branch line cooling part is increased, so that the forming temperature of the glass liquid of the branch line cooling part is increased, and the process requirements of the main line cooling part 300 for producing thin glass and the branch line cooling part for producing conventional glass are met. Of course, in other embodiments, the two-sided spur cooling section may also be used to produce thin glass.

Further, as shown in fig. 2 and 3, the first and second transverse passages 400 and 500 are both communicated with the front half section of the main line cooling portion 300. It can be understood that if the lateral passages on both sides are connected to the rear half section of the main line cooling part 300 according to the forming convection of the molten glass, the lateral temperature difference of the molten glass of the branch line cooling part is increased, and thus the temperature of the molten glass of the branch line cooling part is lowered, thereby being disadvantageous to the forming quality of the molten glass of the branch line cooling part. In the technical scheme of the embodiment, the lateral passages on the two sides are communicated with the front end of the main line cooling part 300, so that molten glass can be divided into the lateral passages on the two sides just when flowing into the main line cooling part 300, and the excessive temperature drop before the molten glass flows into the branch line cooling part is avoided, so that the forming temperature of the molten glass in the branch line cooling part can be met.

Further, as shown in fig. 2 and 3, the area of the first branch line cooling part 600 and the area of the second branch line cooling part 700 are both smaller than the area of the main line cooling part 300. It is understood that in the present embodiment, the main line cooling unit is used to produce thin glass, and the branch line cooling units on both sides are used to produce conventional glass, and by increasing the area of the main line cooling unit 300 (i.e. increasing the average sheet width of the glass original sheet), it is advantageous to reduce the average thickness of the glass original sheet under a constant daily drawing amount of the melting furnace, thereby facilitating the main line cooling unit 300 to produce thin glass.

In the present embodiment, as shown in fig. 2 and 3, a connection port of the neck 200 to the main line cooling unit 300 is formed to be flared toward the main line cooling unit 300. Specifically, a diversion angle is arranged at the tail end of the neck 200, and the diversion angle adopts a chamfer structure, so that the glass liquid is guided to flow into the main line cooling part 300 from the neck 200, and the retention of the glass liquid at the neck 200 is reduced.

In this embodiment, as shown in fig. 2 and 3, the central axis of the melting portion 100 coincides with the central axis of the main line cooling portion 300, so that on one hand, the molten glass in the melting portion 100 can smoothly flow into the main line cooling portion 300, and on the other hand, the molten glass is in favor of the reasonable layout of the melting, forming, annealing and cold end processes of the one-furnace three-line float glass production line.

Further, the central axis of the first transverse passage 400 and the central axis of the second transverse passage 500 are perpendicular to the central axis of the main line cooling part 300. That is, the lateral passages on both sides of the main line cooling part 300 are perpendicular to the main line cooling part 300, which is not only beneficial to smoothly flow the molten glass from the main line cooling part 300 to the lateral passages on both sides, but also beneficial to shorten the length of the lateral passages, and avoids the molten glass from being cooled too much when passing through the lateral passages, thereby reducing the forming quality of the molten glass in the branch line cooling part.

In this embodiment, as shown in fig. 2 and 3, the central axis of the first transverse passage 400 coincides with the central axis of the second transverse passage 500. Therefore, the convection of the molten glass in the two transverse passages is facilitated, the heat conduction of the molten glass in the branch cooling part is increased, and the forming of the molten glass in the branch cooling part is facilitated.

The central axis of the first branch line cooling part 600 is perpendicular to the central axis of the first transverse passage 400; the central axis of the second branch line cooling part 700 and the central axis of the second transverse passage 500 are perpendicular to each other. That is, the first branch line cooling unit 600, the main line cooling unit 300, and the second branch line cooling unit 700 are parallel to each other. Thus, the method is also beneficial to the reasonable layout of the melting, forming, annealing and cold end processes of a one-kiln three-line float glass production line.

Further, as shown in fig. 3, a distance L between the central axis of the first branch line cooling part 600 and the central axis of the main line cooling part 300₁Range, distance L between central axis of second branch line cooling part 700 and central axis of main line cooling part 300₂The range is 15-22 m. The length range of the transverse passages on the two sides is determined by factors such as the designed drawing amount of the melting furnace, the process layout of forming equipment, the specification of glass products and the like. It can be understood that if the length of the transverse passages on the two sides is too short, the reasonable process layout requirement of the branch line cannot be met; if the length of the transverse passages on the two sides is too long, the glass liquid is cooled too much when passing through the transverse passages, so that the temperature of the glass liquid of the two branch cooling parts is lower, the temperature difference between the left side and the right side as well as the upper side and the lower side of the glass liquid of the cross section of the flow passage is larger, and the glass quality can not meet the requirement of the engineering-grade glass quality.

The embodiment of the invention also provides a float glass production line which comprises the float glass melting furnace and a tin bath, wherein the tin bath is communicated with the float glass melting furnace. In this embodiment, the float glass melting furnace includes three cooling portions, which are a main line cooling portion 300 and two branch line cooling portions, respectively; the number of the tin baths is correspondingly set to be three, and the three tin baths are correspondingly communicated with the three cooling parts one by one. The specific structure of the float glass melting furnace refers to the above embodiments, and the float glass production line adopts all the technical schemes of all the above embodiments, so that the float glass melting furnace at least has all the beneficial effects brought by the technical schemes of the above embodiments, and details are not repeated herein.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.