Bottom cooling device and cooling method for float glass tin bath

Abstract

The application discloses a kind of tank bottom cooling device and cooling method of float glass tin tank, belong to float glass technical field.Device includes basement, main shunt pipe, multiple risers on the upside of main shunt pipe, secondary shunt pipe on the top of riser, air valve on the riser, multiple air blowers connected with the end of main shunt pipe, two isolation chambers in front and back of basement, multiple tertiary shunt pipes on the top of secondary shunt pipe and multiple tuyeres on the top of tertiary shunt pipe, and the ventilation window of basement is communicated with atmosphere;Isolation chamber is close to the side of basement with ventilation window, door is equipped on it, and it is communicated with ventilation window;Air blower in the both ends of main shunt pipe is located in two isolation chambers respectively;Tertiary shunt pipe is arranged along front and back, and its lower side middle part is connected with the top of secondary shunt pipe, and its front and back ends are adjacent to two secondary shunt pipes on adjacent two sides respectively;Multiple tertiary shunt pipes of adjacent two secondary shunt pipes are arranged alternately;Tuyere is located adjacent below tin tank.

Description

Technical Field

[0001] This invention belongs to the field of float glass technology, and specifically relates to a bottom cooling device and cooling method for a float glass tin bath. Background Technology

[0002] The tin bath is one of the key pieces of equipment in float glass production. It contains molten tin, and molten glass flows into it from the furnace. The glass floats on the surface of the molten tin, spreads evenly, and cools to form a smooth glass surface. The bottom of the tin bath is generally designed with a steel structure. Because the high temperature of the molten tin can corrode the steel structure at the bottom of the tin bath, causing tin leakage, existing tin baths typically have a cooling system at the bottom to control the temperature below 120°C and prevent corrosion. Current technology uses air cooling to cool the bottom of the tin bath.

[0003] For example, patent application number CN201721669563.5 discloses a glass tin bath bottom cooling system, including multiple glass tin bath bottom cooling nozzles and a cooling air main pipe. The multiple glass tin bath bottom cooling nozzles are connected to the cooling air main pipe. Each nozzle connection pipe is equipped with a cooling air duct valve, and the cooling air main pipe is equipped with a main air duct valve. The multiple glass tin bath bottom cooling nozzles are arranged in an array on the cooling air main pipe.

[0004] For example, patent application number CN202111340953.9 discloses a tin bath ventilation device, including: a main branch pipe disposed at the bottom of the tin bath, the length of which extends along the width direction of the tin bath; multiple secondary branch pipes arranged along the width direction of the tin bath and respectively connected to the main branch pipe, each of the secondary branch pipes having several air outlet holes facing the bottom of the tin bath; a secondary air valve for controlling air volume is provided at the connection between each of the secondary branch pipes and the main branch pipe; the air volume of the multiple secondary branch pipes is configured such that: in the width direction of the bottom of the bath, the change trend of the air volume of the multiple secondary branch pipes is consistent with the temperature change trend of the bottom of the bath.

[0005] In existing technology, the bottom cooling device of the solder bath is usually located in a basement at the bottom of the solder bath. The existing bottom cooling device includes a basement at the bottom of the solder bath, a main distribution pipe at the bottom of the basement running front-to-back, multiple vertical pipes arranged side-by-side on the upper side of the main distribution pipe, secondary distribution pipes at the top of the vertical pipes running left-to-right, air valves on the vertical pipes, blowers connected to the main distribution pipes, and multiple air vents arranged side-by-side on the top of the secondary distribution pipes. Ventilation windows are provided on the left or right side of the basement to connect with the atmosphere. The ground on both sides of the solder bath is connected to the basement through gaps. The upper end of the vertical pipes is connected to the lower middle of the secondary distribution pipes, and the air vents are located adjacent to the bottom of the solder bath.

[0006] The applicant encountered the following problems when using existing bottom cooling devices to cool the solder bath: (1) In the prior art, the basement is connected to the atmosphere through ventilation windows to provide cold air to the blower; the cold air heated by the bottom of the milling tank rises (becomes hot air) and is discharged through the gaps in the ground on both sides of the tin bath. In reality, although the hot air rises, the effect of exhausting hot air through the gaps is not good. A large amount of hot air accumulates in the basement and mixes with the cold air entering through the ventilation windows before re-entering the blower, resulting in poor cooling effect and higher energy consumption.

[0007] (2) The bottom cooling device can only cool the area above the secondary distribution pipe, resulting in poor cooling effect in the area between the two secondary distribution pipes; in addition, the cooling effect at both ends of the secondary distribution pipe is not as good as the cooling effect in the middle of the secondary distribution pipe; in order to ensure the cooling effect of the entire bottom of the tin bath, the power of the blower can only be increased, resulting in higher energy consumption. Summary of the Invention

[0008] To address the aforementioned problems, this invention provides a bottom cooling device and method for a float glass tin bath. The method involves modifying the basement and adding a three-stage distribution pipe, which reduces energy consumption (by more than 30%) while maintaining cooling effectiveness. The technical solution is as follows: On one hand, embodiments of the present invention provide a bottom cooling device for a float glass tin bath. This device includes a basement 2 at the bottom of the tin bath 1, a main distribution pipe 3 at the bottom of the basement 2 arranged in a front-to-back direction, multiple vertical pipes 4 arranged side-by-side on the upper side of the main distribution pipe 3, a secondary distribution pipe 5 at the top of the vertical pipes 4 arranged in a left-to-right direction, air valves 6 on the vertical pipes 4, and a blower 7 connected to the main distribution pipe 3. The basement 2 has ventilation windows on its left or right side that connect to the atmosphere. The ground on both sides of the tin bath 1 is connected to the basement 2 through gaps. The upper end of the vertical pipes 4 is connected to the lower middle part of the secondary distribution pipes 5. The device also includes two isolation chambers 8 at the front and rear ends of the basement 2, and secondary distribution pipes... Multiple tertiary branch pipes 9 are arranged side-by-side at the top of the main branch pipe 3, and multiple air nozzles 10 are arranged side-by-side at the top of the tertiary branch pipes 9. At least two blowers 7 are provided at both ends of the main branch pipe 3. The isolation chamber 8 is located on the side of the basement 2 with a ventilation window, and has a door that connects to the ventilation window. The blowers 7 at both ends of the main branch pipe 3 are located in two isolation chambers 8 respectively. The tertiary branch pipes 9 are arranged in the front-back direction, and their lower middle part is connected to the top of the secondary branch pipe 5. Their front and rear ends are adjacent to two secondary branch pipes 5 on the adjacent sides respectively. Multiple tertiary branch pipes 9 of two adjacent secondary branch pipes 5 are arranged alternately. The air nozzles 10 are located below the adjacent tin bath 1.

[0009] In this embodiment of the invention, the main diversion pipe 3 is located directly below the solder bath 1 and both its front and rear ends are connected to the blower 7 through connecting pipes passing through the corresponding isolation chamber 8. The riser 4 is vertically arranged, and the three-stage diversion pipe 9 is located directly below the solder bath 1.

[0010] Specifically, in this embodiment of the invention, two blowers 7 are provided at both ends of the main diversion pipe 3. Both blowers 7 are turned on or only one is turned on. The blowers 7 are variable frequency blowers.

[0011] In this embodiment of the invention, the ventilation window is arranged in a front-to-back direction, extending from the front end to the rear end of the basement 2. It is located at the upper part of the basement 2, with its front and rear ends located at two isolation rooms 8 respectively. It is a louvered window.

[0012] Preferably, in this embodiment of the invention, the bottom of the secondary shunt pipe 5 is arranged obliquely upward from the middle to the end, and its top is arranged horizontally; the bottom of the tertiary shunt pipe 9 is arranged obliquely upward from the middle to the end, and its top is arranged horizontally.

[0013] In this embodiment of the invention, the nozzle 10 is a vertically arranged circular tube, and multiple nozzles 10 are evenly distributed on the same three-stage diversion pipe 9.

[0014] Furthermore, in this embodiment of the invention, the air valve 6 is located above the riser 4. The depth of the basement 2 is greater than or equal to 5m. The basement 2 is equipped with a grille 11 and two rows of support beams. The two rows of support beams are located at the bottom of the basement 2 and are respectively located on the left and right sides of the main diversion pipe 3. Each row of support beams includes multiple support beams 12 arranged side by side. The grille 11 is horizontally arranged between the air valve 6 and the main diversion pipe 3. It is fixed on the two rows of support beams. It is provided with steps at the bottom of the basement 2 and the ground where the tin bath 1 is located. The distance between it and the air valve 6 is 0.5-1.5m. The riser 4 passes upward through the grille 11.

[0015] In this embodiment of the invention, the isolation room 8 includes a first side, a second side, and a top surface. The first side is arranged in a front-to-back direction and is located outside the support beam 12 on the corresponding side, near the side of the basement 2 with a ventilation window. The second side is arranged in a left-to-right direction and is located near the corresponding front or rear side of the basement 2. The top surface is located on top of the first and second sides and is above the ventilation window. The door is located on the second side. The front or rear side of the basement 2, the bottom of the basement 2, the side of the basement 2 with a ventilation window, the first side, the second side, and the top surface form a sealed isolation room 8.

[0016] On the other hand, embodiments of the present invention also provide a cooling method using the aforementioned float glass tin bath bottom cooling device, the method comprising: controlling the cooling effect by adjusting the number of blowers 7 turned on, the frequency of blowers 7 and the air valve 6, wherein the blowers 7 draw in air through the ventilation window at the isolation chamber 8; the cold air heated by the bottom of the tin bath 1 is discharged from the gap and the ventilation window in the middle of the basement 2.

[0017] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: (1) By isolating the blower through the isolation room, although the blower still draws in cold air from the ventilation window and the heated air is still discharged from the ventilation window, the cold air and hot air are not mixed in the basement, which can significantly reduce energy consumption.

[0018] (2) Blowers are installed at both ends of the main branch pipe (the blowers at both ends need to work at the same time), which makes it easier to adjust while ensuring the air pressure of the nozzle (the cooling requirements of the front and rear of the milling groove are different).

[0019] (3) At least two blowers are installed at both ends of the main branch pipe. The two blowers are configured as one in use and one in standby to avoid poor cooling effect when the blower fails. If the cooling effect is poor, the standby blower can also be turned on.

[0020] (4) Setting up a three-stage distribution pipe allows the cold air to be distributed more evenly at the bottom of the tin bath, which can reduce energy consumption.

[0021] (5) Since the cooling effect at both ends of the three-stage split pipe is not as good as the cooling effect in the middle, the three-stage split pipe is tilted and multiple three-stage split pipes of adjacent secondary split pipes are set alternately (there are nozzles at both ends and nozzles in the middle in the same area) to ensure the uniformity of cooling.

[0022] (6) Due to the setting of the three-stage distribution pipe, the cold air can come out from the three-stage distribution pipe in a point. This patent replaces the air outlet with a tubular air nozzle (with a smaller cooling area), which can increase the wind speed of the cold air and thus improve the cooling effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the bottom cooling device of the float glass tin bath in an embodiment of the present invention; Figure 2 This is a side view of the bottom cooling device of the float glass tin bath in an embodiment of the present invention; Figure 3 This is a structural diagram of the bottom of the basement.

[0024] In the diagram: 1. Tin bath, 2. Basement, 3. Main branch pipe, 4. Riser, 5. Secondary branch pipe, 6. Air valve, 7. Blower, 8. Isolation room, 9. Tertiary branch pipe, 10. Air nozzle, 11. Grille, 12. Support beam. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1 See Figure 1-3 In this patent, for ease of description, the tin bath 1 is defined as being arranged in the front-to-back direction, but this is not intended to limit the scope of this patent. Embodiment 1 provides a bottom cooling device for a float glass tin bath, which includes a basement 2 at the bottom of the tin bath 1, a main branch pipe 3 at the bottom of the basement 2 and arranged in the front-to-back direction, multiple risers 4 arranged side-by-side on the upper side of the main branch pipe 3, a secondary branch pipe 5 at the top of the risers 4 and arranged in the left-to-right direction, a wind valve 6 on the risers 4, at least two blowers 7 at the front end of the main branch pipe 3, at least two blowers 7 at the rear end of the main branch pipe 3, two isolation chambers 8 at the front and rear ends of the basement 2, multiple tertiary branch pipes 9 arranged side-by-side on the top of the secondary branch pipe 5, and multiple air nozzles 10 arranged side-by-side on the top of the tertiary branch pipes 9, etc.

[0027] The tin bath 1 is connected to the basement 2 via gaps on both sides of the ground. The basement 2 is located along the front-to-back direction, with a depth of 5m or more, and has ventilation windows on its left or right side that connect it to the atmosphere. The main branch pipe 3 is located directly below the tin bath 1, and its front and rear ends are connected to the blower 7 via connecting pipes passing through the corresponding isolation chamber 8. It is specifically a rectangular pipe. The vertical pipe 4 is set vertically, and its position is set as needed (uniformly or unevenly distributed). It is specifically a rectangular pipe, and its upper end is connected to the lower middle of the secondary branch pipe 5. The secondary branch pipe 5 is located directly below the tin bath 1, and its left and right ends are located directly below the left and right sides of the tin bath 1, respectively. Multiple tertiary branch pipes 9 are evenly distributed on the same secondary branch pipe 5. The tertiary branch pipe 9 is set along the front-to-back direction, and its lower middle is connected to the top of the secondary branch pipe 5. It is located directly below the tin bath 1, and its front and rear ends are adjacent to two secondary branch pipes 5 on the adjacent sides, respectively. Multiple tertiary branch pipes 9 are arranged alternately on two adjacent secondary branch pipes 5. Air nozzles 10 are located adjacent to each other below the tin bath 1. Specifically, the air nozzles 10 are vertically arranged circular pipes (2-5cm in length and 1-3cm in diameter to ensure airflow speed), and multiple air nozzles 10 on the same tertiary branch pipe 9 are evenly distributed. The isolation chamber 8 is located on the side of the basement 2 with a ventilation window, and a door is provided on it (preferably on the side closer to the middle of the basement 2), located in front of or behind the ventilation window, and connected to the ventilation window. The blowers 7 at both ends of the main branch pipe 3 are located in the two isolation chambers 8 respectively.

[0028] Specifically, in this embodiment of the invention, two blowers 7 are provided at both ends of the main shunt pipe 3. Both blowers 7 are turned on or only one blower 7 is turned on (to achieve one in use and one in standby, the standby blower 7 can be turned on when the temperature is high). The blowers 7 are variable frequency blowers, and by controlling the frequency, the optimal cooling effect is achieved under the premise of energy saving.

[0029] In this embodiment of the invention, the ventilation window is arranged along the front and back direction, specifically as a rectangular window arranged along the front and back direction, extending from the front end to the rear end of the basement 2. It is located at the upper part of the basement 2, with its front and rear ends located at two isolation rooms 8 respectively, and it is a louvered window.

[0030] Preferably, in this embodiment of the invention, the bottom of the secondary distribution pipe 5 is arranged obliquely upward from the middle to the end, and its top is arranged horizontally. The bottom of the tertiary distribution pipe 9 is arranged obliquely upward from the middle to the end, and its top is arranged horizontally. The above structure can ensure the airflow at the end, thereby ensuring a uniform cooling effect.

[0031] Among them, see Figure 3 The isolation room 8 in this embodiment of the invention includes a first side, a second side, and a top surface. That is, the isolation room 8 of this patent shares three sides with the basement 2 to reduce renovation costs. The first side is arranged along the front-to-back direction, located outside the corresponding support beam 12, and close to the side of the basement 2 with a ventilation window. The second side is arranged along the left-to-right direction, close to the corresponding front or rear side of the basement 2. The top surface is located above the first and second sides, above the ventilation window, and is horizontally positioned. A door is located on the second side. The front or rear side of the basement 2, the bottom of the basement 2, the side of the basement 2 with a ventilation window, the first side, the second side, and the top surface form a sealed isolation room 8. The first side, the second side, and the top surface can specifically be made of color steel plates, which are low-cost and easy to install.

[0032] Example 2 See Figure 1-3 Example 2 discloses a bottom cooling device for a float glass tin bath, the structure of which is basically the same as that of Example 1, except that the air valve 6 in this example is located above the riser 4. A grating 11 and two rows of support beams are provided in the basement 2. The grating 11 serves as a floor for easy access by operators. The two rows of support beams are located at the bottom of the basement 2 and on the left and right sides of the main distribution pipe 3, respectively. Each row of support beams includes multiple support beams 12 arranged side-by-side, and the support beams 12 are vertically arranged concrete beams. The grating 11 is horizontally positioned between the air valve 6 and the main distribution pipe 3, fixed to the two rows of support beams. Steps are provided between the grating 11 and the bottom of the basement 2 and the ground where the tin bath 1 is located. The distance between the grating 11 and the air valve 6 is 0.5-1.5m to facilitate operation of the air valve 6 by operators on the grating 11. The riser 4 passes upward through the grating 11 (which has holes for the riser 4 to pass through).

[0033] Example 3 See Figure 1-3 Example 3 discloses a bottom cooling device for a float glass tin bath, the structure of which is basically the same as that of Example 1, except that: a ventilation window is provided on the left side of the basement 2 in this example. Two isolation chambers 8 are located at the front and rear ends of the left side of the basement 2, respectively.

[0034] Example 4 Example 4 provides a method for cooling the bottom of a float glass tin bath, using the float glass tin bath bottom cooling device disclosed in Examples 1-3. The method includes controlling the cooling effect by adjusting the number of blowers 7, the frequency of the blowers 7, and the air valve 6. The blowers 7 draw in air through the ventilation window at the isolation chamber 8; the cold air heated by the bottom of the tin bath 1 is discharged from the gap and the ventilation window in the middle of the basement 2.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bottom cooling device for a float glass tin bath, comprising a basement (2) at the bottom of the tin bath (1), a main branch pipe (3) arranged at the bottom of the basement (2) in a front-to-back direction, multiple vertical pipes (4) arranged side-by-side on the upper side of the main branch pipe (3), a secondary branch pipe (5) arranged at the top of the vertical pipes (4) in a left-to-right direction, a wind valve (6) on the vertical pipes (4), and a blower (7) connected to the main branch pipe (3), wherein the basement (2) is provided with a ventilation window on the left or right side to communicate with the atmosphere, the ground on the left and right sides of the tin bath (1) is connected to the basement (2) through gaps, and the upper end of the vertical pipe (4) is connected to the lower middle part of the secondary branch pipe (5); characterized in that, The device also includes two isolation chambers (8) at the front and rear ends of the basement (2), multiple tertiary diversion pipes (9) arranged side by side on the top of the secondary diversion pipe (5), and multiple air nozzles (10) arranged side by side on the top of the tertiary diversion pipe (9). At least two blowers (7) are provided at both the front and rear ends of the main diversion pipe (3). The isolation chamber (8) is located near the side of the basement (2) with a ventilation window, and has a door that is connected to the ventilation window. The blowers (7) at both ends of the main diversion pipe (3) are located in the two isolation chambers (8). The tertiary diversion pipe (9) is arranged in the front and rear direction, and its lower middle part is connected to the top of the secondary diversion pipe (5). Its front and rear ends are adjacent to two secondary diversion pipes (5) on the adjacent sides. Multiple tertiary diversion pipes (9) of two adjacent secondary diversion pipes (5) are arranged alternately. The air nozzles (10) are located below the adjacent tin bath (1). The bottom of the secondary diversion pipe (5) is arranged obliquely upward from the middle to the end, and its top is arranged horizontally; the bottom of the tertiary diversion pipe (9) is arranged obliquely upward from the middle to the end, and its top is arranged horizontally. The nozzle (10) is a vertically arranged circular tube, and multiple nozzles (10) on the same three-stage diversion pipe (9) are evenly distributed.

2. The bottom cooling device for the float glass tin bath according to claim 1, characterized in that, The main branch pipe (3) is located directly below the tin bath (1) and both its front and rear ends are connected to the blower (7) through connecting pipes passing through the corresponding isolation chamber (8). The riser (4) is set vertically, and the three-stage branch pipe (9) is located directly below the tin bath (1).

3. The bottom cooling device for the float glass tin bath according to claim 1, characterized in that, The main shunt pipe (3) is equipped with two blowers (7) at both ends. Both blowers (7) are turned on or only one is turned on. The blowers (7) are variable frequency blowers.

4. The bottom cooling device for the float glass tin bath according to claim 1, characterized in that, The ventilation window is arranged in the front-to-back direction, from the front end to the rear end of the basement (2), located at the upper part of the basement (2), with its front and rear ends located at two isolation rooms (8) respectively, and it is a louvered window.

5. The bottom cooling device for the float glass tin bath according to claim 1, characterized in that, The air valve (6) is located above the riser (4). The depth of the basement (2) is greater than or equal to 5m. The basement (2) is equipped with a grille (11) and two rows of support beams. The two rows of support beams are located at the bottom of the basement (2) and on the left and right sides of the main diversion pipe (3). Each row of support beams includes multiple support beams (12) arranged side by side. The grille (11) is horizontally arranged between the air valve (6) and the main diversion pipe (3). It is fixed on the two rows of support beams. It is provided with steps at the bottom of the basement (2) and the ground where the tin bath (1) is located. The distance between it and the air valve (6) is 0.5-1.5m. The riser (4) passes through the grille (11) upwards.

6. The bottom cooling device for the float glass tin bath according to claim 5, characterized in that, The isolation room (8) includes a first side, a second side, and a top surface; the first side is arranged in the front-to-back direction and is located outside the support beam (12) on the corresponding side, and is close to the side of the basement (2) with a ventilation window; the second side is arranged in the left-to-right direction and is located close to the corresponding front or rear side of the basement (2); the top surface is located on top of the first side and the second side and is located above the ventilation window; the door is located on the second side; the front or rear side of the basement (2), the bottom of the basement (2), the side of the basement (2) with a ventilation window, the first side, the second side, and the top surface form a sealed isolation room (8).

7. A cooling method using the bottom cooling device of the float glass tin bath according to any one of claims 1-6, characterized in that, The method includes controlling the cooling effect by adjusting the number of blowers (7) turned on, the frequency of blowers (7) and the air valve (6), wherein the blowers (7) draw in air through the ventilation window at the isolation room (8); the cold air heated by the bottom of the tin bath (1) is discharged from the ventilation window in the gap and the middle of the basement (2).

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