Variable cross-section furnace and glass melting tank

Abstract

The application discloses a variable cross-section small furnace and a glass melting furnace, and relates to the technical field of float glass melting furnaces. The small furnace comprises a supporting refractory brick, side walls, a small furnace arch and a bottom plate assembly; the two side walls are respectively stacked on the two sides of the supporting refractory brick; the two ends of the small furnace arch are respectively connected with the two side walls; the bottom plate assembly is arranged on the supporting refractory brick and surrounded by the side walls and the small furnace arch to form a gas passage; and at least one end of the bottom plate assembly is movable in the direction close to the small furnace arch to change the cross-sectional area of the gas passage. The application improves the structure of the small furnace of the glass melting furnace, changes the downward inclination angle of the bottom of the small furnace by adjusting the position of the bottom plate of the small furnace, changes the contact position of the combustion-supporting air and the fuel sprayed by the small furnace, thereby realizing the control of the flame length; and the cross-sectional area of the gas passage of the small furnace is changed, the different requirements of different fuel amounts of the lower spray gun of the small furnace on the combustion-supporting air amount are matched, the combustion sufficiency is effectively improved, and the fuel waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of float glass melting furnace technology, and more particularly to a variable cross-section small furnace and glass melting furnace. Background Technology

[0002] In a float glass melting furnace, the small furnace is a crucial component, its purpose being to preheat and mix the fuel and air for combustion. The small furnace passage consists of a small furnace arch, side walls, and a bottom plate, connected at one end to the regenerator and at the other to the furnace body. Because this type of furnace uses a counter-firing combustion method, when combustion occurs on one side, the small furnace on that side provides combustion air for the fuel, while the small furnace on the opposite side serves as a waste gas passage to discharge exhaust gases. Conversely, when combustion occurs on the opposite side, the opposite side provides combustion air for the fuel, while the small furnace on the same side serves as a waste gas passage to discharge exhaust gases. The main function of the small furnace is to supply air for fuel combustion on the combustion side and to act as a waste gas passage to discharge exhaust gases on the non-combustion side.

[0003] Below the connection between the small furnace and the main furnace body, there are typically 2-4 fuel injection nozzles. Fuel enters the furnace through the nozzles and nozzle interfaces, where it mixes and burns with the air supplied from the small furnace. Existing small furnaces, designed by engineers and constructed by workers, are already complete and cannot be altered or adjusted during their entire lifespan. However, each small furnace supplies combustion air to multiple nozzles. In some cases, the amount of fuel injected by each nozzle may differ, leading to incomplete combustion within a small area of ​​the furnace and resulting in fuel waste. Summary of the Invention

[0004] The main objective of this invention is to provide a variable cross-section small furnace and glass melting furnace, which aims to improve combustion efficiency and reduce fuel waste.

[0005] To achieve the above objectives, the present invention proposes a variable cross-section small furnace, comprising:

[0006] We undertake the production of refractory bricks;

[0007] Side walls, the two side walls are respectively stacked on both sides of the receiving refractory bricks;

[0008] The small furnace arch is connected at both ends to the two side walls mentioned above; and

[0009] A base plate assembly is disposed on the receiving refractory brick and forms a gas channel with the side wall and the small furnace arch. At least one end of the base plate assembly can move in a direction close to the small furnace arch to change the cross-sectional area of ​​the gas channel.

[0010] Optionally, the base plate assembly includes a base plate, a blocking member, a supporting ball sleeve assembly, and a supporting column. The receiving refractory bricks form an installation hole, and the base plate is disposed within the installation hole. The receiving refractory bricks have a clearance channel for the supporting column and the supporting ball sleeve assembly to pass through. The supporting column is rotatably connected to the supporting ball sleeve assembly, and the supporting ball sleeve assembly is fixed to the bottom of the base plate. The blocking member is disposed between the receiving refractory bricks and the base plate to prevent gas in the gas channel from leaking from the bottom of the base plate.

[0011] Optionally, the supporting ball sleeve assembly includes a fixing plate, a connecting column, and a ball sleeve. The fixing plate is fixed to the bottom of the base plate, the connecting column is connected to the fixing plate, and the ball sleeve is disposed at the lower end of the connecting column. The supporting column includes a column body and a ball head connected to the column body, and the ball sleeve is rotatably sleeved on the ball head.

[0012] Optionally, the small furnace further includes a driving device connected to the bottom of the support column, the driving device being used to drive the support column and the base plate thereon to move in a direction close to or away from the small furnace arch.

[0013] Optionally, the blocking member includes a first isolation member and a second isolation member spaced apart from the first isolation member. Both ends of the first isolation member and the second isolation member are respectively fixed to the receiving refractory brick and the base plate, and the length of the first isolation member is less than the length of the second isolation member.

[0014] Optionally, both the first and second spacers are made of soft refractory materials.

[0015] Optionally, the bottom of the base plate is provided with a receiving groove for receiving the end of the support ball sleeve assembly.

[0016] Optionally, the bottom of the base plate is provided with the receiving groove at each of the four corners, and a set of the supporting ball sleeve assembly and the supporting column are provided in each of the receiving grooves.

[0017] Optionally, the supporting refractory brick is assembled from multiple refractory bricks, which are divided into four corner bricks and multiple straight bricks. The multiple straight bricks are stacked to form a square main body, and the four corner bricks are built at the four corners of the square main body and support the edge of the base plate respectively.

[0018] To achieve the above objectives, the present invention also proposes a glass melting furnace, comprising the small furnace as described above, wherein the small furnace includes:

[0019] We undertake the production of refractory bricks;

[0020] Side walls, the two side walls are respectively stacked on both sides of the receiving refractory bricks;

[0021] The small furnace arch is connected at both ends to the two side walls mentioned above; and

[0022] A base plate assembly is disposed on the receiving refractory brick and forms a gas channel with the side wall and the small furnace arch. At least one end of the base plate assembly can move in a direction close to the small furnace arch to change the cross-sectional area of ​​the gas channel.

[0023] In the technical solution of this invention, the small furnace includes a receiving refractory brick, side walls, a small furnace arch, and a bottom plate assembly. The side walls are respectively stacked on both sides of the receiving refractory brick; both ends of the small furnace arch are connected to the side walls; the bottom plate assembly is disposed on the receiving refractory brick and forms a gas channel with the side walls and the small furnace arch. At least one end of the bottom plate assembly can move along the direction close to the small furnace arch to change the cross-sectional area of ​​the gas channel. It can be understood that this invention improves the structure of the small furnace in a glass melting furnace. By adjusting the position of the bottom plate, the cross-sectional area of ​​the gas channel in the small furnace is changed, which can match the different requirements of different fuel quantities in the lance for the amount of combustion air, effectively improving combustion completeness and reducing fuel waste. Simultaneously, the downward tilt angle of the bottom of the small furnace can be changed, altering the contact position between the combustion air ejected from the small furnace and the fuel, thereby achieving control over the flame length. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the bottom plate in the first state in one embodiment of the small furnace of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the mid-base plate assembly;

[0027] Figure 3 This is a schematic diagram of the structure of the bottom plate in the second state in one embodiment of the small furnace of the present invention;

[0028] Figure 4 for Figure 3 Schematic diagram of the mid-base plate assembly;

[0029] Figure 5 This is a schematic diagram of the structure of the bottom plate in the third state in one embodiment of the small furnace of the present invention;

[0030] Figure 6 for Figure 5 Schematic diagram of the mid-base plate assembly;

[0031] Figure 7 This is a schematic diagram of the structure of the supporting ball sleeve assembly in one embodiment of the small furnace of the present invention;

[0032] Figure 8 This is a schematic diagram of the support column structure in one embodiment of the small furnace of the present invention;

[0033] Figure 9 This is a top view of the refractory bricks being supported in one embodiment of the small furnace of the present invention;

[0034] Figure 10 This is a structural diagram of the corner brick supporting the refractory bricks in one embodiment of the small furnace of the present invention;

[0035] Figure 11 This is a structural diagram of a straight brick supporting refractory bricks in one embodiment of the small furnace of the present invention.

[0036] Explanation of icon numbers:

[0037] 10. Refractory bricks; 20. Side wall; 30. Small furnace arch; 40. Base plate assembly; 100a. Gas passage; 41. Base plate; 42. Blocking element; 43. Support ball sleeve assembly; 44. Support column; 10a. Mounting hole; 431. Fixing plate; 432. Connecting column; 433. Ball sleeve; 441. Column; 442. Ball head; 421. First isolation element; 422. Second isolation element; 11. Corner brick; 12. Straight brick.

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] This invention proposes a variable cross-section small furnace, particularly a small furnace for float glass melting furnaces, though not limited to this.

[0043] Reference Figures 1 to 6 In one embodiment of the present invention, the small furnace includes a receiving refractory brick 10, side walls 20, a small furnace arch 30, and a bottom plate assembly 40; the side walls 20 are respectively stacked on both sides of the receiving refractory brick 10; the two ends of the small furnace arch 30 are respectively connected to the top of the side walls 20; the bottom plate assembly 40 is disposed on the receiving refractory brick 10 and surrounds the side walls 20 and the small furnace arch 30 to form a gas channel 100a, and at least one end of the bottom plate assembly 40 can move in a direction close to the small furnace arch 30 to change the cross-sectional area of ​​the gas channel 100a.

[0044] In this embodiment, the supporting refractory brick 10 mainly serves to support the base plate assembly 40, and it can be composed of multiple refractory bricks joined together. Figure 1 , Figures 9 to 11 The refractory bricks are divided into four corner bricks 11 and several straight bricks 12. The straight bricks 12 are stacked to form a square main body, and the four corner bricks 11 are built at the four corners of the square main body and support the edges of the base plate 41 respectively. In addition, the side walls 20 and the small furnace arch 30 can adopt the relevant structures of existing small furnaces, which are not limited here.

[0045] The base plate assembly 40 may include at least one base plate 41 and an adjustment mechanism connected to the base plate 41. The adjustment mechanism may use a motor, cylinder, or hydraulic cylinder as a driving component. The driving component can be connected to the base plate 41 through a transmission component to automatically drive the end of the base plate 41 to move, thereby changing the cross-sectional area of ​​the gas channel 100a. Of course, the cross-sectional area of ​​the gas channel 100a can also be changed by manually driving the end of the base plate 41. This is not a limitation.

[0046] Understandably, this invention improves the structure of the small furnace in a glass melting furnace. By adjusting the position of the bottom plate 41 of the small furnace, the cross-sectional area of ​​the gas channel 100a of the small furnace is changed, which can match the different requirements of the combustion air volume for different fuel quantities in the spray gun, effectively improving the combustion completeness and reducing fuel waste. At the same time, the downward tilt angle of the bottom of the small furnace can be changed, thereby changing the contact position between the combustion air sprayed from the small furnace and the fuel, thus achieving control over the flame length.

[0047] To adjust the cross-sectional area of ​​the gas channel 100a and further improve the adjustment accuracy, refer to Figures 1 to 8 In one embodiment, the base plate assembly 40 may include a base plate 41, a blocking member 42, a supporting ball sleeve assembly 43, and a supporting column 44. The receiving refractory brick 10 surrounds and forms an installation hole 10a. The base plate 41 is disposed in the installation hole 10a. The receiving refractory brick 10 is provided with a clearance channel for the supporting column 44 and the supporting ball sleeve assembly 43 to pass through. The supporting column 44 is rotatably connected to the supporting ball sleeve assembly 43. The supporting ball sleeve assembly 43 is fixed to the bottom of the base plate 41. The blocking member 42 is disposed between the receiving refractory brick 10 and the base plate 41 to prevent gas in the gas channel 100a from leaking from the bottom of the base plate 41. In particular, it blocks the high temperature inside the small furnace after the base plate 41 is lifted and prevents the combustion air and exhaust gas inside the small furnace from leaking.

[0048] By setting up the blocking component 42, the present invention effectively prevents the leakage of combustion-supporting gas and fuel, saves fuel, and ensures production safety.

[0049] In this embodiment, the blocking member 42 includes a first isolation member 421 and a second isolation member 422 spaced apart from the first isolation member 421. Both ends of the first isolation member 421 and the second isolation member 422 are respectively fixed on the receiving refractory brick 10 and the base plate 41. The length of the first isolation member 421 may be less than the length of the second isolation member 422. The specific dimensions can be determined by the height difference at the connection and the designed adjustment height, which is not limited here.

[0050] Both the first spacer 421 and the second spacer 422 can be made of soft refractory materials, that is, refractory materials that can change shape at high temperatures, such as ceramic fiber blankets. The two ends of the first spacer 421 and the second spacer 422 can be connected to the base plate 41 and the supporting refractory brick 10 respectively by bolts or other means.

[0051] To enable the bottom plate 41 to have an adjustable downward tilt angle within a small range, further improving the accuracy of the downward tilt angle adjustment of the small furnace bottom, and thus achieving precise control of the flame length, refer to... Figures 6 to 8In one embodiment, the supporting ball sleeve assembly 43 may include a fixing plate 431, a connecting column 432 and a ball sleeve 433. The fixing plate 431 is fixed to the bottom of the base plate 41, the connecting column 432 is connected to the fixing plate 431, and the ball sleeve 433 is disposed at the lower end of the connecting column 432. The supporting column 44 includes a column body 441 and a ball head 442 connected to the column body 441, and the ball sleeve 433 is rotatably fitted onto the ball head 442.

[0052] To ensure reliable connection and facilitate the construction of the small furnace, in this embodiment, the bottom of the base plate 41 is provided with a receiving groove for accommodating the end of the supporting ball sleeve assembly 43. Receiving grooves can be provided at all four corners of the bottom of the base plate 41, and each receiving groove contains a set of supporting ball sleeve assemblies 43 and supporting columns 44.

[0053] In this embodiment, the support column 44 can be configured as 4, and the ball head 442 at the top of each column extends into the ball sleeve 433 of the support ball sleeve assembly 43, and can rotate within a small range relative to the center of the ball head 442 inside the ball sleeve 433.

[0054] In addition, the small furnace may also include a drive device connected to the bottom of the support column 44. The drive device is used to drive the support column 44 and the base plate 41 on it to move in a direction close to or away from the small furnace arch 30. The power device can be any device capable of providing lifting motion, such as mechanical, electric, pneumatic, hydraulic and other drive devices.

[0055] By setting up a driving device, the present invention enables each support column 44 to move up and down independently, realizing independent lifting and lowering adjustment of the four corners of the base plate 41, further increasing the range of the cross-sectional area of ​​the gas channel 100a, and improving the accuracy of the size of the gas channel 100a.

[0056] It should be noted that the small furnaces perform different tasks at different times. When burning on their own side, the small furnace on their own side provides combustion air for fuel combustion, while the small furnace on the opposite side acts as a tail gas passage to discharge tail gas. When burning on the opposite side, the small furnace on the opposite side provides combustion air for fuel combustion, while the small furnace on their own side acts as a tail gas passage to discharge tail gas.

[0057] (1) When burning on the opposite side, such as Figure 1 and Figure 2 As shown, all four support columns 44 of the small furnace on this side can be moved downwards to the lowest position, so that the bottom plate 41 falls directly on the refractory brick 10. At this time, the small furnace has the largest cross-sectional area, which facilitates the exhaust of exhaust gas.

[0058] (2) When burning on this side, the small furnace has the following two functions:

[0059] like Figure 3As shown, when the amount of fuel sprayed by the nozzles below the small furnace is different, taking the arrangement of three nozzles below the small furnace, with the nozzle on the right receiving more fuel and the nozzle on the left receiving less fuel as an example, the two support columns 44 on the left side of the small furnace can be moved upwards, reducing the cross-sectional area of ​​the left side of the small furnace and increasing the cross-sectional area of ​​the right side. Since the combustion air is a freely moving gas, the flow rate of the part with the larger cross-sectional area naturally increases, resulting in a larger amount of combustion air on the right side of the small furnace. This accommodates the situation where the right nozzle receives more fuel and the left nozzle receives less fuel, thus ensuring complete combustion of all fuel and avoiding fuel waste.

[0060] like Figure 5 As shown, when the amount of fuel sprayed by the lances below the small furnace is the same, taking three lances arranged below the small furnace with equal fuel spray as an example, the two support columns 44 of the small furnace that are relatively far from the kiln can be moved upwards, or the two support columns 44 of the small furnace that are relatively close to the kiln can be moved upwards, thereby changing the downward inclination angle of the small furnace bottom plate 41. At this time, the contact position between the combustion air sprayed from the small furnace and the fuel sprayed by the lances can be changed without changing the angle of the lances. The length of the flame can be adjusted in this way.

[0061] In summary, by employing the aforementioned bottom plate assembly 40 structure, this invention can provide varying amounts of combustion air within a small area of ​​the kiln for multiple fuel-spraying nozzles below the small furnace, thereby ensuring complete combustion of all fuel and preventing fuel waste. Furthermore, the downward inclination angle of the small furnace bottom plate 41 can be flexibly adjusted to change the contact position between the combustion air sprayed from the small furnace and the fuel sprayed from the nozzles, thus adjusting the flame length.

[0062] The present invention also proposes a glass melting furnace, which includes a small furnace. The specific structure of the small furnace is as described in the above embodiments. Since the glass melting furnace proposed in this invention includes all the solutions of all the embodiments of the small furnace described above, it has at least the same technical effects as described above, which will not be elaborated here.

[0063] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A variable cross-section small furnace, characterized in that, include: We undertake the production of refractory bricks; Side walls, the two side walls are respectively stacked on both sides of the receiving refractory bricks; The small furnace arch is connected to the two side walls mentioned above at both ends; as well as A base plate assembly is disposed on the receiving refractory bricks and forms a gas channel with the side wall and the small furnace arch. At least one end of the base plate assembly can move in the direction close to the small furnace arch to change the cross-sectional area of ​​the gas channel. The base plate assembly includes a base plate, a blocking member, a supporting ball sleeve assembly, and a supporting column. The receiving refractory bricks form an installation hole, and the base plate is disposed in the installation hole. The receiving refractory bricks have a clearance channel for the supporting column and the supporting ball sleeve assembly to pass through. The supporting column is rotatably connected to the supporting ball sleeve assembly, and the supporting ball sleeve assembly is fixed to the bottom of the base plate. The blocking member is disposed between the receiving refractory bricks and the base plate to prevent gas in the gas channel from leaking from the bottom of the base plate.

2. The small furnace as described in claim 1, characterized in that, The supporting ball sleeve assembly includes a fixing plate, a connecting column, and a ball sleeve. The fixing plate is fixed to the bottom of the base plate, the connecting column is connected to the fixing plate, and the ball sleeve is disposed at the lower end of the connecting column. The supporting column includes a column body and a ball head connected to the column body, and the ball sleeve is rotatably sleeved on the ball head.

3. The small furnace as described in claim 1, characterized in that, The small furnace also includes a driving device connected to the bottom of the support column. The driving device is used to drive the support column and the bottom plate on it to move in a direction close to or away from the small furnace arch.

4. The small furnace as described in claim 1, characterized in that, The blocking member includes a first isolation member and a second isolation member spaced apart from the first isolation member. Both ends of the first isolation member and the second isolation member are respectively fixed to the receiving refractory brick and the base plate. The length of the first isolation member is less than the length of the second isolation member.

5. The small furnace as described in claim 4, characterized in that, Both the first and second isolation components are made of soft refractory materials.

6. The small furnace as described in claim 1, characterized in that, The bottom of the base plate is provided with a receiving groove for accommodating the end of the supporting ball sleeve assembly.

7. The small furnace as described in claim 6, characterized in that, The bottom of the base plate is provided with a receiving groove at each of the four corners, and a set of the supporting ball sleeve assembly and the supporting column are provided in each receiving groove.

8. The small furnace as described in any one of claims 1 to 7, characterized in that, The supporting refractory brick is made up of multiple refractory bricks. The multiple refractory bricks are divided into 4 corner bricks and multiple straight bricks. The multiple straight bricks are stacked to form a square main body. The 4 corner bricks are built at the four corners of the square main body and support the edge of the base plate respectively.

9. A glass melting furnace, characterized in that, Includes the small furnace as described in any one of claims 1 to 8.

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