Stirring structure and stirring method with low swing and high-efficiency homogenization

Abstract

A stirring structure and stirring method with low swing and high-efficiency homogenization. The stirring structure comprises a stirring inlet pipe (1) and a stirring tank (2), wherein the stirring tank (2) comprises a buffer tank (5) and a stirring container (6); the stirring container (6) is in communication with and mounted below the buffer tank (5), and the stirring inlet pipe (1) is in communication with and mounted on a wall of the buffer tank (5); and a stirrer (3) is provided in the stirring tank (2). The stirrer (3) comprises a stirring shaft (7), a first stirring blade (8) and a second stirring blade (9). The mounting height of the stirring inlet pipe (1) is lower than that of the stirring container (6). The stirring inlet pipe (1) is mounted on the buffer tank (5) to buffer molten glass flowing into the stirring inlet pipe (1); and the buffered molten glass enters the stirring container (6) under the action of the stirrer (3).

Description

Low-swing high-efficiency homogenization stirring structure and stirring method TECHNICAL FIELD

[0001] The application belongs to the technical field of substrate glass production and relates to a low-swing high-efficiency homogenization stirring structure and stirring method. BACKGROUND

[0002] The core of the manufacture of substrate glass is located in the hot end, that is, the kiln, the platinum channel and the forming area, the average temperature of the entire hot end region is as high as 1500 DEG C or above, and some regions even reach 1650 DEG C, which has great challenges to the stability and long-term service life of the equipment. The stirring system in the platinum channel region mainly undertakes the uniformization treatment of the composition and texture of the high-temperature clarified glass liquid. The stirrer is the core component, and through continuous uniform rotation, the glass liquid in the stirring tank is subjected to real-time stretching, shearing and other operations to realize high-quality glass output. The stirring system commonly used in the industry is mainly formed by a vertically distributed stirring tank and a transition pipe connected on one side to form a connecting channel of the glass liquid, but this structure has defects. The one-way force of the single-sided glass liquid injection on the rotation of the stirrer is increased with the continuous increase of the glass flow, and this phenomenon becomes more and more significant. In the later stage of production, the overall stirring mechanism is further aggravated due to the fatigue deformation of some components caused by long-term operation, and even the safety of the equipment is affected. In addition, the single-sided glass injection also has the problem of viscosity segregation of the glass in the stirring process, that is, too much and large density glass flows into the side close to the inlet, which has a certain influence on the overall homogenization effect of the glass liquid. TECHNICAL PROBLEM

[0003] The existing channel stirring system has the problems of stability caused by the one-way action of the glass fluid on the stirrer and viscosity segregation of the glass liquid close to the inflow side. TECHNICAL SCHEME

[0004] The application aims to solve the problems of stability caused by the one-way action of the glass fluid on the stirrer and viscosity segregation of the glass liquid close to the inflow side in the existing channel stirring system, and provides a low-swing high-efficiency homogenization stirring structure and stirring method.

[0005] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0006] The low-swing high-efficiency homogenization stirring structure provided by the application comprises a stirring inlet pipe and a stirring tank, the stirring tank comprises a buffer pool and a stirring container, the stirring container is connected and installed below the buffer pool, the stirring inlet pipe is connected and installed on the wall of the buffer pool, and a stirrer is arranged in the stirring tank.

[0007] Preferably, the stirrer comprises a stirring shaft and first stirring blades mounted on the stirring shaft.

[0008] Preferably, the first stirring blades are equidistantly mounted on the stirring shaft.

[0009] Preferably, second stirring blades are also mounted on the stirring shaft, and the second stirring blades are inverted L-shaped.

[0010] Preferably, the second stirring blades are equidistantly mounted on the stirring shaft in the circumferential direction, and the thickness of the second stirring blades ranges from 8mm to 12mm.

[0011] Preferably, the installation height of the stirring inlet pipe is lower than the stirring container.

[0012] Preferably, the installation height difference between the stirring inlet pipe and the stirring container ranges from 5mm to 20mm.

[0013] Preferably, the diameter of the stirring container ranges from 330mm to 380mm, the diameter of the buffer tank ranges from 410mm to 600mm, and the height of the buffer tank ranges from 160mm to 200mm.

[0014] Preferably, the buffer tank is U-shaped.

[0015] The present application provides a stirring method of a low-swing high-efficiency homogenizing stirring structure, which comprises the following steps:

[0016] The stirring inlet pipe is mounted on the buffer tank to buffer the glass liquid flowing into the stirring inlet pipe;

[0017] The glass liquid subjected to the buffering treatment is introduced into the stirring container under the action of the stirrer;

[0018] The glass liquid is made to flow in the 360° direction under the action of the stirring container to realize stirring. Advantages

[0019] The low-swing high-efficiency homogenization stirring structure provided by the application changes the original structure of directly flowing in from one side of the glass liquid into a buffer dispersed flow, so that the single-side force of the glass liquid on the stirrer is changed into uniform force in the circumferential direction, which effectively improves the negative influence of the glass liquid on the stability of the entire stirrer. According to the principle, the uneven force generated by the single-side glass flow into the stirring tank is fully considered, which affects the long-term stable operation of the stirrer, and the single-side glass flow is easy to form a segregation phenomenon of viscosity and temperature near the end, which weakens the homogenization effect. The uneven force transition of the fluid before entering the stirring tank body is realized by increasing the special-shaped buffer pool, and the glass liquid is continuously injected into the stirring tank in the form of 360° overflow, which significantly improves the rotational stability of the entire stirrer, provides sufficient guarantee for the long-life reliability and high-efficiency homogenization of the equipment, realizes the uniform force of the glass liquid on the stirrer in the circumferential direction, significantly improves the abnormal swing problem of the stirrer in the running process, and realizes the high-efficiency homogenization of the large-flow glass liquid.

[0020] Further, the independent second stirring blade designed on the upper part of the stirrer has a preliminary flow stabilizing effect on the overflow glass liquid in the upper layer, and provides a better basic condition for the formal stirring homogenization below. The structure of the application can realize larger flow, higher stability and longer life of the stirring equipment and process effect in the future.

[0021] Further, the top end of the stirring inlet pipe is slightly lower than the top end of the standard stirring part, and the pressure loss height formed by the system glass liquid is generally 5mm to 20mm lower than the top end of the standard stirring part, so that the glass liquid from the stirring inlet pipe first enters the special-shaped buffer pool, and when the new glass liquid accumulates to the upper edge of the special-shaped buffer pool, it is uniformly overflowed into the standard stirring part along the circular interface. At this time, the stirrer will not produce a single-side glass pushing force. The specific traditional single-side glass flow into the stirring mode is that the stirring tank is longitudinally distributed, and the glass liquid flows into the tank from the lateral pipe on one side. The stirrer will have a single-direction pushing force, which affects the stability of the stirring. Therefore, the special-shaped buffer pool structure of the application can effectively improve this problem.

[0022] Further, the second stirring blade is made of the same material as the main structure of the stirrer, which is generally a strengthened platinum-rhodium alloy material, has sufficient strength and high corrosion resistance, and has a total thickness of 8mm to 12mm. The shape is an inverted "L" type, and the bending direction is downward, which plays a role in flow guiding. BRIEF DESCRIPTION OF DRAWINGS

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of the overall structure of the low-oscillation, high-efficiency homogenization stirring structure of the present invention;

[0025] Figure 2 is a schematic diagram of the overall irregular-shaped stirring tank of the present invention;

[0026] Figure 3 is a schematic diagram of the traditional single-sided glass melt inflow stirring method;

[0027] Figure 4 shows the stirrer of the present invention with an additional independent top blade;

[0028] Figure 5 is a schematic diagram illustrating the operating principle and function of the present invention.

[0029] In the figure: 1 is the stirring inlet pipe; 2 is the stirring tank; 3 is the stirrer; 4 is the guiding electrode; 5 is the buffer tank; 6 is the stirring container; 7 is the stirring shaft; 8 is the first stirring blade; 9 is the second stirring blade; 10 is the glass melt; 11 is the glass melt with viscosity-temperature segregation. Embodiments of the present invention

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0034] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The present application will be described in further detail below with reference to the accompanying drawings:

[0037] The low-swing high-efficiency homogenization stirring structure provided by the present application, as shown in FIGS. 1 to 5, comprises a stirring inlet pipe 1 and a stirring tank 2, wherein the stirring tank 2 comprises a buffer pool 5 and a stirring container 6; the stirring container 6 is communicatively installed below the buffer pool 5, the stirring inlet pipe 1 is communicatively installed on the wall of the buffer pool 5; and a stirrer 3 is arranged in the stirring tank 2. The buffer pool 5 is in a U-shaped structure. The buffer pool in a special shape is a circular pipe body, and the overall pipe diameter must be greater than or equal to 25% to 60% of the standard stirring tank pipe diameter. The buffer pool 5 is generally circular, and the cross-sectional shape is a rotating body in the shape of an approximate "U", which has the function of a container capable of containing glass.

[0038] The stirrer 3 comprises a stirring shaft 7 and first stirring blades 8 mounted on the stirring shaft 7. The stirring shaft 7 further comprises second stirring blades 9 in the shape of inverted L. The first stirring blades 8 are in plurality and mounted on the stirring shaft 7 at equal intervals. The second stirring blades 9 are in plurality and mounted on the stirring shaft 7 at equal intervals in the circumferential direction, and the thickness of the second stirring blades 9 ranges from 8 mm to 12 mm.

[0039] The installation height of the stirring inlet pipe 1 is lower than that of the stirring container 6. The difference in installation height between the stirring inlet pipe 1 and the stirring container 6 ranges from 5 mm to 20 mm. The diameter of the stirring container 6 ranges from 330 mm to 380 mm, the diameter of the buffer pool 5 ranges from 410 mm to 600 mm, and the height of the buffer pool 5 ranges from 160 mm to 200 mm.

[0040] Referring to FIG. 1, it is a schematic diagram of the overall mode of the present application, and the main structures include a stirring inlet pipe 1, a stirring tank 2, a stirrer 3, and a drainage electrode 4. The core design scheme of the present application is the stirring tank 2, the stirrer 3, and the method based thereon. The stirring inlet pipe 1 is a necessary structure in the original scheme, and the drainage electrode 4 is a heating electrode also existing in the original structure. An upper group and a lower group form a complete loop to input current to the entire stirring tank.

[0041] Referring to FIG. 2, it is a specific structural scheme of the stirring tank 2, which mainly includes a special-shaped buffer pool 5 and a stirring container 6. As can be seen from the figure, the top end of the stirring inlet pipe 1 is slightly lower than the top end of the stirring container 6. Considering the pressure loss height formed by the system glass liquid, the top of the stirring inlet pipe 1 is generally 5 mm to 20 mm lower than the top end of the stirring container 6, so that the glass liquid from the stirring inlet pipe 1 first enters the special-shaped buffer pool 5, and then the newly accumulated glass liquid overflows into the stirring container 6 along the circular interface. At this time, the stirrer 3 will not generate a one-sided glass pushing force as shown in FIG. 3. The specific traditional stirring mode of the glass liquid flowing into the stirring tank from one side will generate a one-way pushing force on the stirrer 3, which will affect the stability of the stirring. Therefore, the special-shaped buffer pool 5 structure of the present application can effectively improve this problem.

[0042] The special-shaped buffer pool 5 needs to be separately processed, molded by a mold, and then locally adjusted in structure. Finally, it is welded with the stirring container 6. The materials of the two are both platinum-rhodium alloy, and the Rh content is generally controlled in the range of 10% to 25%, which can guarantee the processability of the material and have sufficient high-temperature strength.

[0043] The diameter of the current stirring container 6 is generally in the range of 330mm-380mm according to the glass flow, and the maximum diameter of the special-shaped buffer tank 5 is generally designed to be in the range of 410mm-600mm relative to the diameter of the stirring container 6, the height of the glass liquid in the buffer tank 5 is about 160mm-200mm, and the residence time can be maintained for about 40s-100s, so that the glass liquid forms a relatively stable state before overflowing into the stirring container 6.

[0044] 1. For the newly overflowed glass liquid into the stirring container 6, preliminary horizontal stirring is needed to ensure the uniformity of the glass liquid flowing in the circumferential direction, and based on the present application, a stirrer 3 with a second stirring blade 9 at the top is designed, and the structure is shown in Figure 4, and a separate blade paddle is added to the traditional stirrer. The stirring length of the second stirring blade 9 is larger than the diameter of the lower main stirring blade 8, and the gap from the stirring container 6 is generally designed to be 15mm, which can realize the maximum stirring of the overflowed glass. The material of the second stirring blade 9 is completely consistent with the main structure of the stirrer, which is generally a strengthened platinum-rhodium alloy material, which has enough strength and high corrosion resistance, and the total thickness of the blade is 8mm-12mm, and the shape is inverted "L" type, the bending direction is downward, which plays a role in drainage, and the rotation range is 80%-90% of the standard stirring tank diameter. The second stirring blade 9 is connected with the stirring shaft 7 by welding, and one can be arranged in the circumferential direction, or 2-6 can be arranged at equal intervals. Through the second stirring blade 9 combined with the special-shaped buffer tank 5, the glass liquid entering the stirring container 6 is fully divided and stirred, which can eliminate the sticky temperature segregation glass liquid 11 near the single side of the incoming material as shown in Figure 3. The said sticky temperature segregation glass is the glass with too large viscosity and density, which has adverse effects on the overall glass quality.

[0045] The glass liquid formed by the special-shaped buffer tank 5 designed by the present application uniformly dispersed into the stirring container 6 in the circumferential direction, and the horizontal force generated by the stirrer 3 is also changed from single side to symmetrical distribution, as shown in Figure 5, the sticky temperature segregation glass liquid 11 basically does not generate a deviated force to the stirrer 3, but a symmetrical force in the circumferential direction, which makes the overall operation of the stirrer more stable, especially after running for more than 3 years under large flow, the swing amount is still not more than 2mm, which provides sufficient guarantee for the industrial application of subsequent design of larger capacity equipment and longer life reliability equipment.

[0046] The present application provides a low-swing high-efficiency homogenization stirring method of stirring structure, which comprises the following steps:

[0047] Step 1, install the stirring inlet pipe 1 on the buffer tank 5, and buffer the glass liquid flowing into the stirring inlet pipe 1;

[0048] Step 2, the buffered glass liquid enters the stirring container 6 under the action of the stirrer 3;

[0049] Step 3, the glass liquid is made to flow in 360° direction under the action of the stirring container 6 to realize stirring.

[0050] Specifically,

[0051] Between the stirring inlet and the stirring tank body, the columnar glass liquid flowing in one side is subjected to buffering treatment of flow rate and flow direction; the glass melt is not directly introduced into the stirring tank, but forms a horizontal distribution of circular flow at the upper part of the stirring tank; the circular flow accumulates and then overflows, so that the glass liquid flows in 360° direction into the stirring tank; the just overflowed glass liquid is subjected to local stirring to be subjected to flow state stabilization treatment again. The flow rate of the glass liquid is in the range of 1000 kg / h-1300 kg / h. The temperature of the glass liquid is controlled in the range of 1400℃-1460℃. The flow rate of the columnar glass liquid flowing in one side is in the range of 3mm / s-6mm / s. The buffering treatment of flow rate and flow direction is realized by lowering the height of the stirring inlet to below the upper edge of the standard stirring tank, pre-setting an independent glass space, buffering the glass liquid about to flow into the standard stirring tank through the space, and then flowing into the standard stirring tank. The buffering pool can accommodate about 50kg-150kg of glass melt.

[0052] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low-swing high-efficiency homogenizing stirring structure, characterized in that, Including stirring inlet pipe (1) and stirring tank (2), the stirring tank (2) includes buffer pool (5) and stirring container (6);The stirring container (6) is installed below the buffer pool (5), and the stirring inlet pipe (1) is installed on the wall of the buffer pool (5);Stirrer (3) is arranged in the stirring tank (2).

2. The low-slosh high-efficiency homogenizing impeller structure of claim 1, wherein, The stirrer (3) includes stirring shaft (7) and first stirring blade (8), and the first stirring blade (8) is installed on the stirring shaft (7).

3. The low-slosh high-efficiency homogenizing impeller structure of claim 2, wherein, The first stirring blade (8) has several, and several first stirring blades (8) are installed equidistantly on the stirring shaft (7).

4. The low-slosh high-efficiency homogenizing impeller structure of claim 2, wherein, Second stirring blade (9) is also installed on the stirring shaft (7), and the second stirring blade (9) is inverted L type.

5. The low-slosh high-efficiency homogenizing impeller structure of claim 4, wherein, The second stirring blade (9) has several, and several second stirring blades (9) are installed equidistantly in the circumferential direction of the stirring shaft (7), and the thickness of the second stirring blade (9) ranges from 8mm to 12mm.

6. The low-slosh high-efficiency homogenizing impeller structure of claim 1, wherein, The installation height of the stirring inlet pipe (1) is lower than that of the stirring container (6).

7. The low-slosh high-efficiency homogenizing impeller structure of claim 6, wherein, The installation height difference between the stirring inlet pipe (1) and the stirring container (6) ranges from 5mm to 20mm.

8. The low-slosh high-efficiency homogenizing impeller structure of claim 1, wherein, The diameter of the stirring container (6) ranges from 330mm to 380mm, the diameter of the buffer pool (5) ranges from 410mm to 600mm, and the height of the buffer pool (5) ranges from 160mm to 200mm.

9. The low-slosh high-efficiency homogenizing impeller structure of claim 1, wherein, The buffer pool (5) is U-shaped structure.

10. A stirring method of a low-swing high-efficiency homogenizing stirring structure, characterized by, The low-swing high-efficiency homogenization stirring structure of any one of claims 1-9 comprises: Install the stirring inlet pipe (1) on the buffer pool (5), and buffer the glass liquid flowing into the stirring inlet pipe (1); The glass liquid treated by buffering enters the stirring container (6) under the action of the stirrer (3); Under the action of the stirring container (6), the glass liquid flows in 360° direction to realize stirring.

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