WO2022110563A1 - Float glass melting furnace and float glass production line - Google Patents

Abstract

A float glass melting furnace, comprising a melting part (100), a main line cooling part (300), a first branch line cooling part (600), and a second branch line cooling part (700). The main line cooling part (300) and the melting part (100) are in communication with each other via a neck (200), and a first transverse passage (400) and a second transverse passage (500) are in communication with two sides of the main line cooling part (300), respectively. The first branch line cooling part (600) and the second branch line cooling part (700) are respectively provided on the two sides of the main line cooling part (300), the first branch line cooling part (600) is in communication with the first transverse passage (400), and the second branch line cooling part (700) is in communication with the second transverse passage (500). Further provided is a float glass production line comprising the float glass melting furnace.

Description

Float Glass Furnace and Float Glass Production Line

This application requires a Chinese patent application filed on November 27, 2020 with an application number of 202022808441.8 and titled "Float Glass Furnace and Float Glass Production Line", and a Chinese patent application filed on February 5, 2021 with an application number of 202120341945.5 , the priority of the Chinese patent application entitled "Float Glass Furnace and Float Glass Production Line", which is hereby incorporated by reference in its entirety.

technical field

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

Background technique

In the related art, the float glass production line generally adopts the structure of "one kiln and one line", that is, one kiln is matched with one glass production line (one melting furnace is connected to one tin bath). As shown in Figure 1, the furnace only includes one melting part. 100' and a cooling part 300', and also includes a neck 200', a small furnace 110', a regenerator 120' and the like. This kind of melting furnace has certain limitations in actual production, especially the large-tonnage melting furnace cannot produce thin glass, which has a negative impact on the business varieties and business benefits of the enterprise.

technical problem

The main purpose of this application is to propose a float glass melting furnace, which aims to solve the technical problem that a large-tonnage float glass melting furnace cannot produce thin glass.

technical solutions

In order to achieve the above purpose, the present application proposes a float glass melting furnace, the float glass melting furnace includes:

melting part;

a main line cooling part, the main line cooling part communicates with the melting part through a neck, and two sides of the main line cooling part are respectively connected with a first transverse passage and a second transverse passage; and,

The first branch line cooling part and the second branch line cooling part are respectively provided on both sides of the main line cooling part, the first branch line cooling part communicates with the first lateral passage, and the second branch line cooling part communicates with the the second lateral passage.

Optionally, both the first lateral passage and the second lateral passage communicate with the first half of the main line cooling portion.

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

Optionally, the connection port connecting the neck and the main line cooling part is arranged in a flared manner toward the main line cooling part.

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

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

Optionally, an acute angle is formed between the central axis of the first transverse passage and the central axis of the main line cooling portion; and/or the central axis of the second transverse passage and the central axis of the main line cooling portion There is an acute angle setting between them.

Optionally, the first lateral passage and the second lateral passage are arranged symmetrically with respect 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, the first branch line cooling part and the second branch line cooling part are arranged symmetrically with respect to the central axis of the main line cooling part.

Optionally, the central axis of the first branch line cooling portion and the central axis of the first lateral passage are perpendicular to each other; the central axis of the second branch line cooling portion and the central axis of the second lateral passage are perpendicular to each other.

Optionally, the distance range between the central axis of the first branch line cooling part and the central axis of the main line cooling part, the distance between the central axis of the second branch line cooling part and the central axis of the main line cooling part The spacing range is 15~30m.

Optionally, the distance range between the central axis of the first branch line cooling part and the central axis of the main line cooling part, the distance between the central axis of the second branch line cooling part and the central axis of the main line cooling part The spacing range is 15~22m.

The application also provides a float glass production line, comprising:

The aforementioned float glass melting furnace; and,

A tin bath, which is communicated with the float glass melting furnace.

beneficial effect

The present application provides a float glass melting furnace. By adding two lateral passages on both sides of the main line cooling part and two side branch line cooling parts, a new one-kiln three-line float glass melting furnace is formed. The float glass melting furnace By rationally distributing the pulling amount of the main line cooling part and the branch line cooling part, the pulling amount of the glass liquid in the main line cooling part is reduced, so as to achieve the purpose that the main line cooling part can produce thin glass, and at the same time effectively increase the amount of glass liquid in the branch line cooling part. flow, so as to meet the forming temperature of the molten glass in the branch cooling part.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort.

Fig. 1 is the structural representation of the float glass melting furnace of "one kiln and one line" structure in the prior art;

2 is a schematic structural diagram of a float glass melting furnace in an embodiment of the application;

FIG. 3 is a partial structural schematic diagram of the float glass melting furnace shown in FIG. 2 .

Description of reference numbers:

label	name	label	name
100′	melting department	110′	Small stove
120′	regenerator	200′	Card neck
300′	Cooling section	100	melting department
200	Card neck	300	Main line cooling section
400	first lateral passage	500	second lateral passage
600	The first branch cooling section	700	Second branch cooling section

The realization, functional characteristics and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present application, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, and taking "A and/or B as an example", it includes scheme A, scheme B, or scheme that A and B satisfy at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection claimed in this application.

The embodiment of the present application proposes a float glass melting furnace.

In an embodiment of the present application, as shown in FIG. 2 and FIG. 3 , the float glass melting furnace includes:

melting part 100;

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

The first branch line cooling part 600 and the second branch line cooling part 700 are respectively disposed on both sides of the main line cooling part 300 , the first branch line cooling part 600 communicates with the first lateral passage 400 , and the second branch line The cooling part 700 communicates with the second lateral passage 500 .

It should be noted that float glass is named after the molten glass floats on the surface of the molten metal to obtain polishing and molding. The molten glass continuously flows into the tin bath filled with protective gas (N ₂ and H ₂ ) from the furnace. It floats on the metal tin liquid surface, and is flattened and polished to form a glass ribbon with a uniform thickness, two surfaces parallel, flat and polished. It is a kind of flat glass (plate-shaped silicate). Among them, the melting process of float glass is one of the main stages in the manufacturing process of float glass, that is, the process of heating qualified batches at high temperature to form a uniform, pure, transparent and conforming glass liquid that meets the molding requirements. The melting furnace is the place where the float glass melting process takes place. Specifically, the glass melting process can be summarized into the following stages: silicate formation stage - glass liquid formation stage - glass liquid clarification stage - glass liquid homogenization stage - glass liquid cooling stage.

The relevant "one kiln and one line" float glass melting furnace has certain limitations in actual production, especially the large tonnage melting furnace cannot produce thin glass, that is, when the daily drawing capacity of the melting furnace is large, its cooling section Thin glass cannot be produced. Among them, the technical formula of the daily pulling amount of the melting furnace is:

Daily pulling amount = pulling speed × average board width × average thickness × 24 × 2.5

In the formula, the daily pulling amount - the weight of the molten glass drawn every day and night, the unit is t;

Pulling speed—the length of pulling the original glass plate per unit time, the unit is m/h;

Average plate width—the average width of the original glass plate in production, the unit is m;

Average thickness—the average thickness of the original glass plate during production, in m;

24—hours per day and night, in h;

2.5—The density of the glass liquid, the unit is t/m ³ .

It can be known from the above formula that when the daily pulling amount of the "one kiln and one line" float glass melting furnace is large, and the area of the cooling part is constant, the average thickness of the glass original plate will increase. Therefore, such a large-tonnage melting furnace cannot produce thin glass, which will adversely affect the business varieties and business benefits of the enterprise.

On the basis of the traditional large-tonnage "one kiln and one line" float glass melting furnace, the technical solution of the present embodiment forms a new type of new type of float glass melting furnace by adding lateral passages on both sides and branch cooling parts on both sides on both sides of the main line cooling part 300 . One kiln three-line float glass melting furnace. By rationally distributing the pulling amount of the main line cooling part 300 and the branch line cooling part, the pulling amount of the glass liquid in the main line cooling part 300 is reduced, so that the main line can produce thin glass. , and can also meet the forming temperature of the molten glass in the branch cooling section.

It can be understood that the main line is designed as a thin glass production line. Due to the small pulling amount, the glass liquid stays in the main line cooling part 300 for a long time, so that a good glass liquid clarification and homogenization effect can be achieved, and the thin glass of the main line cooling part 300 can be improved. Molding quality. In addition, the initial molding temperature of the molten glass is generally about 1050°C. Since a lateral passage is added between the branch cooling part and the main cooling part 300, when the liquid glass in the branch cooling part passes through the lateral passage, the heat dissipation of the natural cooling of the molten glass will increase. , the molding temperature of the molten glass at the outlet of the branch cooling part will be low, so it is necessary to increase the convection flow of the molten glass in the cooling part of the branch, so as to increase the heat conduction of the molten glass in the cooling part of the branch, and finally meet the molding temperature of the molten glass in the cooling part of the branch .

In the technical solution of this embodiment, the main line cooling section is used to produce thin glass, and the branch line cooling sections on both sides are used to produce glass of regular thickness. It should be noted that whether the main line or the branch line can produce thin glass is mainly determined by the pulling amount of the main line and the branch line, and the forming process temperature of the molten glass in the main line cooling part 300 and the branch line cooling part. The main line is designed as a thin glass production line, because the pulling amount of the main line cooling part 300 is small, which reduces the convection flow of the glass liquid in the main line cooling part 300, which is beneficial to the clarification, homogenization and cooling effect of the glass liquid in the main line cooling part 300. The convective flow of the liquid glass in the branch cooling section is increased, thereby increasing the forming temperature of the liquid glass in the branch cooling section, thereby simultaneously meeting the technological requirements for the main line cooling section 300 to produce thin glass and the branch line cooling section to produce conventional glass. Of course, in other embodiments, the branch cooling parts on both sides can also be used to produce thin glass.

In one embodiment, as shown in FIG. 2 and FIG. 3 , both the first lateral passage 400 and the second lateral passage 500 communicate with the first half of the main line cooling part 300 . In the technical solution of this embodiment, by connecting the lateral passages on both sides to the front end of the main line cooling part 300, the molten glass can be diverted to the lateral passages on both sides as soon as it flows into the main line cooling part 300, thereby preventing the molten glass from flowing into the branch line for cooling The temperature drop before the section is too large, so that the forming temperature of the molten glass in the branch cooling section can be satisfied.

In another embodiment, the lateral passages on both sides may communicate with the middle or second half of the main line cooling part 300 , and the present application does not limit the relative positions of the lateral passages on both sides and the main line cooling part 300 .

In one embodiment, as shown in FIG. 2 and FIG. 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 can be understood that in this embodiment, the main line cooling section is used to produce thin glass, while the branch line cooling sections on both sides are used to produce conventional glass. By increasing the area of the main line cooling section 300 (that is, increasing the average glass plate width), under the condition that the daily drawing amount of the melting furnace is constant, it is beneficial to reduce the average thickness of the original glass plate, thereby facilitating the production of thin glass by the main line cooling part 300 .

In this embodiment, the area of the first branch line cooling part 600 is the same as the area of the second branch line cooling part 700 , so that the pulling amount of the branch line cooling parts located on both sides of the main line cooling part 300 is the same, which is beneficial to the main line cooling part 300 The molten glass can flow out from both sides evenly, which is beneficial to improve the clarification, homogenization and cooling effect of the molten glass in the main line cooling part 300 .

In another embodiment, the area of the first branch line cooling part 600 is different from the area of the second branch line cooling part 700 , but the areas of the two branch line cooling parts 600 are both smaller than the area of the main line cooling part 300 .

In yet another embodiment, the area of the main line cooling part 300 , the first branch line cooling part 600 and the second branch line cooling part 700 may also be the same, that is, the two branch line cooling parts and the main line cooling part have the same pulling amount, which can be For the production of thin glass.

In this embodiment, as shown in FIG. 2 and FIG. 3 , the connection port connecting the neck 200 and the main line cooling part 300 is arranged in a flared manner toward the main line cooling part 300 . Specifically, a guide angle is provided at the end of the neck 200, and the guide angle adopts a chamfered structure, which is beneficial to guide the molten glass from the neck 200 to flow into the main line cooling part 300 and reduce the retention of the liquid glass at the neck 200. .

In one embodiment, as shown in FIG. 2 and FIG. 3 , the central axis of the melting part 100 is coincident with the central axis of the main line cooling part 300 , so on the one hand, the molten glass in the melting part 100 can flow smoothly into the main line cooling part. 300, on the other hand, it is beneficial to the rational layout of the melting, forming, annealing and cold end processes of one kiln three-line float glass production line.

In another embodiment, the central axis of the melting part 100 and the central axis of the main line cooling part 300 may be displaced, that is, the central axes of the two do not overlap. It is understood that as long as the distance between the central axes of the two is not large, the melting will not be affected. The molten glass in the section 100 flows into the main line cooling section 30 .

In one embodiment, the central axis of the first lateral passage 400 and the central axis of the second lateral passage 500 are both perpendicular to the central axis of the main line cooling portion 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, so that it is not only conducive to the smooth flow of the glass liquid from the main-line cooling part 300 to the lateral passages on both sides, but also is conducive to shortening the length of the lateral passages, avoiding When the molten glass passes through the lateral passage, the temperature is too high, which reduces the molding quality of the molten glass in the cooling part of the branch line.

In another embodiment, the transverse passages on both sides of the main line cooling part 300 may not be perpendicular to the main line cooling part 300, or one side of the transverse passages is perpendicular to the main line cooling part 300, and the other side transverse passages are not perpendicular to the main line cooling part 300. The cooling part is vertical, which is not limited in the present application.

Further, the central axis of the first transverse passage 400 and the central axis of the main line cooling part 300 are arranged at an acute angle; and/or the central axis of the second transverse passage 500 and the central axis of the main line cooling part 300 are arranged at an acute angle . It can be understood that the transverse passage can be arranged at an acute angle with the main line cooling part 300, and the transverse passage is inclined toward the rear end of the main line cooling part 300, so that the glass liquid in the main line cooling part 300 can quickly flow to the transverse passage and the branch line cooling part, which is beneficial to increase the molding temperature of the molten glass in the cooling part of the branch line

In an embodiment, as shown in FIG. 2 and FIG. 3 , the first lateral passage 400 and the second lateral passage 500 are symmetrically arranged with respect to the central axis of the main line cooling part 300 . In this way, it is beneficial to reasonable convection of the molten glass in the two lateral passages, and it is beneficial to increase the heat conduction of the molten glass in the cooling part of the branch line, thereby facilitating the molding of the molten glass in the cooling part of the branch line. Further, the central axis of the first transverse passage 400 is coincident with the central axis of the second transverse passage 500, which is beneficial for the glass liquid in the main line cooling part 300 to flow out from both sides at the same time, so that the glass liquid in the main line cooling part 300 can be quickly lifted. clarification, homogenization and cooling effect. Of course, in other embodiments, the central axis of the first transverse passage 400 and the central axis of the second transverse passage 500 may not overlap, but the two transverse passages may also be symmetrically arranged with respect to the central axis of the main line cooling part 300 .

In another embodiment, the first lateral passage 400 and the second lateral passage 500 are arranged asymmetrically. It can be understood that although the lateral passages located on both sides of the main line cooling part are arranged asymmetrically, the glass liquid in the main line cooling part 300 can still be divided into the lateral passages on both sides, so as to reduce the pulling amount of the main line cooling part 300 . Effect.

In one embodiment, the first branch line cooling part 600 and the second branch line cooling part 700 are arranged symmetrically with respect to the central axis of the main line cooling part 300 . In the technical solution of this embodiment, the branch line cooling parts located on both sides of the main line cooling part 300 are symmetrically arranged, which is conducive to the rational layout of the melting, forming, annealing, and cold end processes of one kiln three-line float glass production line, and is beneficial to the main line cooling part 300. The molten glass in the cooling part 300 can flow out evenly from both sides, so as to further improve the clarification, homogenization and cooling effect of the molten glass in the main line cooling part 300 .

Further, the central axis of the first branch line cooling part 600 and the central axis of the first lateral passage 400 are perpendicular to each other; the central axis of the second branch line cooling part 700 and the central axis of the second lateral passage 500 are perpendicular to each other. That is, the first branch line cooling part 600 , the main line cooling part 300 and the second branch line cooling part 700 are parallel to each other. Of course, in other embodiments, the central axis of the first branch line cooling part 600 and the central axis of the first transverse passage 400 are not perpendicular to each other, and the central axis of the second branch line cooling part 700 and the central axis of the second transverse passage 500 are not mutually perpendicular Vertical, but the two branch line cooling parts can still be arranged symmetrically with respect to the central axis of the main line cooling part 300 .

In another embodiment, the first branch line cooling part 600 and the second branch line cooling part 700 are arranged asymmetrically. It can be understood that although the branch line cooling parts located on both sides of the main line cooling part are arranged asymmetrically, the glass liquid in the main line cooling part 300 can still be shunted to the branch line cooling parts on both sides, so as to reduce the pulling of the main line cooling part 300 quantity effect.

Further, as shown in FIG. 3 , the range of the distance L1 between the central axis of the first branch line cooling part 600 and the central axis of the main line cooling part 300 , the central axis of the second branch line cooling part 700 and the central axis of the main line cooling part 300 The distance L2 between them is in the range of 15~30m. That is, the lengths of the lateral passages on both sides range from 15 to 30 m, and optionally, the lengths of the lateral passages on both sides may be 15 m, 22 m, 25 m, and 30 m, respectively. The length range of the lateral passages on both sides is determined by factors such as the drawing amount of the furnace design, the process layout of the molding equipment, and the specifications of the glass products produced. It can be understood that if the length of the lateral passages on both sides is too short, it cannot meet the reasonable process layout requirements of the branch lines; and if the length of the lateral passages on both sides is too long, it will cause the glass liquid to cool down too much when passing through the lateral passages, so the two branch lines are cooled. The temperature of the molten glass will also be lower, which will cause the temperature of the molten glass in the cross section of the flow channel to differ greatly from left to right and up and down, so that the quality of the glass does not meet the requirements of engineering-grade glass.

In one embodiment, the length of the lateral passages on both sides ranges from 15 to 22 m. It can be understood that the shorter the length of the lateral passages on both sides, the easier it is to meet the forming temperature of the molten glass in the branch cooling part, but if the length of the lateral passages is too short, It is not conducive to the placement and layout of the branch cooling part. Therefore, the technical solution of this embodiment further limits the length range of the lateral passages on both sides, so as to ensure the forming temperature of the glass of the branch cooling part, and at the same time reasonably arrange the branch cooling parts.

The embodiment of the present application also proposes a float glass production line, the float glass production line includes the aforementioned float glass melting furnace and a tin bath, and the tin bath is communicated with the float glass melting furnace. In this embodiment, the float glass melting furnace includes three cooling parts, respectively the main line cooling part 300 and the two branch line cooling parts; and the number of tin baths is also set to three correspondingly, three tin baths and three cooling parts One-to-one correspondence. The specific structure of the float glass melting furnace refers to the above-mentioned embodiments. Since the float glass production line adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. This will not be repeated one by one.

The above descriptions are only optional embodiments of the present application and are not intended to limit the scope of the patent of the present application. Under the inventive concept of the present application, any equivalent structural transformations made by using the contents of the description and drawings of the present application, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of this application.

Claims (14)

1. A float glass melting furnace, comprising:

   melting part;

   a main line cooling part, the main line cooling part communicates with the melting part through a neck, and two sides of the main line cooling part are respectively connected with a first transverse passage and a second transverse passage; and,

   The first branch line cooling part and the second branch line cooling part are respectively provided on both sides of the main line cooling part, the first branch line cooling part communicates with the first lateral passage, and the second branch line cooling part communicates with the the second lateral passage.
2. The float glass melting furnace according to claim 1, wherein both the first lateral passage and the second lateral passage communicate with the first half of the main line cooling part.
3. The float glass melting furnace according to claim 1, wherein 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.
4. The float glass melting furnace according to claim 1, wherein the connection port connecting the collar and the main line cooling part is provided in a flared manner toward the main line cooling part.
5. The float glass melting furnace according to any one of claims 1 to 4, wherein the central axis of the melting portion coincides with the central axis of the main line cooling portion.
6. The float glass melting furnace according to claim 5, wherein the central axis of the first lateral passage and the central axis of the second lateral passage are both perpendicular to the central axis of the main line cooling portion.
7. The float glass melting furnace according to claim 5, wherein the central axis of the first lateral passage and the central axis of the main line cooling part are arranged at an acute angle; and/or, the second lateral passage has an acute angle. An acute angle is formed between the central axis and the central axis of the main line cooling part.
8. The float glass melting furnace according to any one of claims 1 to 4, wherein the first lateral passage and the second lateral passage are arranged symmetrically with respect to the central axis of the main line cooling portion.
9. 8. The float glass melting furnace of claim 8, wherein the central axis of the first lateral passage coincides with the central axis of the second lateral passage.
10. The float glass melting furnace according to claim 8, wherein the first branch line cooling part and the second branch line cooling part are arranged symmetrically with respect to the central axis of the main line cooling part.
11. The float glass melting furnace according to claim 10, wherein the central axis of the first branch cooling part and the central axis of the first lateral passage are perpendicular to each other; the central axis of the second branch cooling part is perpendicular to the central axis of the second branch cooling part The central axes of the second transverse passages are perpendicular to each other.
12. The float glass melting furnace according to claim 11, wherein the distance range between the central axis of the first branch line cooling part and the central axis of the main line cooling part, the central axis of the second branch line cooling part The distance from the central axis of the main line cooling part is in the range of 15 to 30 m.
13. The float glass melting furnace according to claim 12, wherein the distance range between the central axis of the first branch line cooling part and the central axis of the main line cooling part, the central axis of the second branch line cooling part The distance from the central axis of the main line cooling part is in the range of 15 to 22 m.
14. A float glass production line, comprising:

    A float glass melting furnace as claimed in any one of claims 1 to 13; and,

    A tin bath, which is communicated with the float glass melting furnace.