Bubbling system of glass melting furnace

Abstract

The utility model discloses a bubbling system of a glass melting furnace. The bubbling system comprises a nitrogen supply device, a tetrabutyl titanate supply device, a tetraethoxysilane supply device, a mixed gas supply device, a bubbling device and pipelines for connecting the bubbling device, after the nitrogen supply device, the tetrabutyl titanate supply device and the tetraethoxysilane supply device are mutually connected in parallel, outlets of the nitrogen supply device, the tetrabutyl titanate supply device and the tetraethoxysilane supply device are communicated with an inlet of the mixed gas supply device, an outlet of the mixed gas supply device is communicated with the bubbling device, the bubbling device is arranged at the pool bottom of the glass melting furnace, and a gas outlet of the bubbling device faces the glass liquid level.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass production equipment and relates to a bubbling system for homogenizing and clarifying high-temperature molten glass liquid in a glass melting furnace. Background Art

[0002] In the glass manufacturing process, the raw materials are mixed together and sent to the melting furnace. After being heated to a high temperature, they are melted to form glass liquid, and then cooled and formed into glass products. In order to make the various molten raw materials mix evenly and discharge the various gases generated by the reaction of the raw materials in the glass liquid as soon as possible, the glass liquid needs to be clarified and homogenized before cooling and forming. Bubbling technology is an effective, economical, safe, practical and easy-to-operate means to clarify and homogenize the glass liquid, so it is widely used. Bubbling technology usually installs a bubbling device at the bottom of the glass melting furnace pool. The gas (usually compressed air or nitrogen) is continuously bubbled into the glass liquid from the bottom of the melting furnace pool in the form of bubbles through the bubbler in the bubbling device, and the glass liquid is stirred by blowing bubbles to promote the convection of the glass liquid, thereby achieving the effect of clarifying and homogenizing the glass liquid.

[0003] However, the compressed air or nitrogen that is blown in has limited effect on clarifying and homogenizing the glass melt. Utility Model Content

[0004] The utility model aims to provide a bubbling system capable of improving the clarification and homogenization effects in view of the technical defects existing in the prior art, comprising a nitrogen supply device (2), a tetrabutyl titanate supply device (14), an ethyl orthosilicate supply device (17), a mixed gas supply device (4), a bubbling device (12) and a pipeline for connecting them; the nitrogen supply device (2), the tetrabutyl titanate supply device (14) and the ethyl orthosilicate supply device (17) are connected in parallel with each other, and their outlets are all connected with the inlet of the mixed gas supply device, the outlet of the mixed gas supply device (4) is connected with the bubbling device (12), and the bubbling device (12) is arranged at the bottom of a glass melting furnace and the gas outlet faces the direction of the glass liquid surface; and the utility model further comprises a pressure regulating unit, a pressure metering unit, a flow regulating unit, a flow metering unit and a gas processing unit arranged on the pipeline.

[0005] A gas processing unit (5) and a second pressure regulating unit (6) which are connected in sequence along the direction of the nitrogen are arranged on the pipeline between the nitrogen supply device (2) and the mixed gas supply device (4).

[0006] A first gasification unit (15) and a first flow metering unit (16) which are connected in sequence along the direction of the gas are arranged on the pipeline between the tetrabutyl titanate supply device (14) and the mixed gas supply device (4).

[0007] A second gasification unit (18) and a second flow metering unit (19) which are connected in sequence along the direction of the gas are arranged on the pipeline between the ethyl orthosilicate supply device (17) and the mixed gas supply device (4).

[0008] The gas outlet of the mixed gas supply device (4) is connected to the gas outlet of the bubbling device (12), there are multiple bubbling devices (12), the gas outlet of the mixed gas supply device (4) is branched into multiple gas paths and are respectively connected to the gas outlets of the multiple bubbling devices (12), a flow regulating unit (10) is arranged between the gas outlet of the mixed gas supply device (4) and each bubbling device (12), and the number of gas paths corresponds to the number of bubbling devices (12).

[0009] A gas path selection unit (9) is also provided between the mixed gas supply device (4) and the flow regulating unit (10); the gas outlet of the mixed gas supply device 4 is branched into two gas paths which are connected to the gas inlet of the gas path selection unit (9); the gas outlet of the gas path selection unit (9) is connected to the gas outlet of the bubbling device (12); and the number of gas paths of the gas outlet of the gas path selection unit (9) corresponds to the number of the bubbling devices (12).

[0010] Of the two gas paths of the gas outlet of the mixed gas supply device (4), one path is provided with a third pressure regulating unit (7) for controlling the pressure maintaining pressure of the gas outlet of the bubbling device; and the other path is provided with a gas control unit (8).

[0011] A mixed gasification clarifier supply device (13) is further provided between the tetrabutyl titanate gas outlet of the first gasification unit (15), the ethyl orthosilicate gas outlet of the second gasification unit (18), and the gas inlet of the mixed gas supply device (4); the tetrabutyl titanate gas outlet of the first gasification unit (15) and the ethyl orthosilicate gas outlet of the second gasification unit (18) are connected in parallel and are both in communication with the gas inlet of the mixed gasification clarifier supply device (13); and the gas outlet of the mixed gasification clarifier supply device (13) is in communication with the gas inlet of the mixed gas supply device (4).

[0012] The bubbling device (12) is provided with a circulating water cooling unit (11).

[0013] The gas outlet of the bubbling device (12) is conical and has a gas outlet aperture d of 0.8-1.8 mm.

[0014] The bubbling system of the utility model includes a nitrogen supply device, a tetrabutyl titanate supply device, an ethyl orthosilicate supply device and a mixed gas supply device. The tetrabutyl titanate supply device can provide vaporized tetrabutyl titanate, the ethyl orthosilicate supply device can provide vaporized ethyl orthosilicate, and the mixed gas supply device can provide a mixed gas of nitrogen, vaporized tetrabutyl titanate and vaporized ethyl orthosilicate. The system allows tetrabutyl titanate and ethyl orthosilicate to fully contact and react with the glass liquid by bubbling the mixed gas into the glass liquid, while absorbing the gas generated by the raw materials of the glass liquid and generating bubbles to promote the convection of the glass liquid; not only that, the water produced by the reaction also increases the water content in the atmosphere, and the glass liquid will generate hydroxy silicon in an atmosphere with a high water content, which can reduce the viscosity of the glass liquid and promote the convection of the glass liquid. It can be seen that the bubbling system of the utility model improves the effect of clarifying and homogenizing the glass liquid from at least the above three aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic structural diagram of the bubbling system of the utility model;

[0016] Figure 2 An enlarged schematic diagram of the structure of the gas outlet of the bubbler in the bubbling device shown.

[0017] Reference numerals in the figures indicate:

[0018] 1: standby nitrogen supply device, 2: nitrogen supply device, 3: first pressure regulating unit, 4: mixed gas supply device, 5: gas source processing unit, 6: second pressure regulating unit, 7: third pressure regulating unit, 8: gas control unit, 9: gas path selection unit, 10: flow regulating unit, 11: circulating cooling water unit, 12: bubbling device, 13: mixed gasification clarifier supply device, 14: tetrabutyl titanate supply device, 15: first gasification unit, 16: first flow metering unit, 17: tetraethyl orthosilicate supply device, 18: second gasification unit, 19: second flow metering unit, 20: bubbler. DETAILED DESCRIPTION

[0019] The following is a more specific description of the content of the present invention in conjunction with the accompanying drawings and specific embodiments, and further elaborations are made on the present invention, but these embodiments are by no means intended to limit the present invention.

[0020] like Figure 1As shown, the bubbling system of the glass melting furnace provided by the utility model includes: a nitrogen supply device 2, a tetrabutyl titanate supply device 14, a ethyl orthosilicate supply device 17, a mixed gas supply device 4 and a bubbling device 12. Among them, the nitrogen supply device 2, the tetrabutyl titanate supply device 14 and the ethyl orthosilicate supply device 17 are connected in parallel with each other and the outlets of these three devices are connected to the gas inlet of the mixed gas supply device 4, and the outlet of the mixed gas supply device 4 is connected to the bubbling device 12. The bubbling device 12 is arranged at the bottom of the glass melting furnace and the gas outlet of the bubbler 20 is facing the direction of the glass liquid surface. The bubbling system also includes a pressure regulating unit, a pressure metering unit, a flow regulating unit, a flow metering unit, a gas processing unit, etc., which are arranged on the pipeline as needed. Among them,

[0021] The pipeline between the nitrogen supply device 2 and the mixed gas supply device 4 is provided with a gas processing unit 5 and a second pressure regulating unit 6 which are connected in sequence along the direction of the nitrogen. The nitrogen outlet of the nitrogen supply device 2 is connected to the gas inlet of the mixed gas supply device 4. The nitrogen in the nitrogen supply device 2 is provided by a nitrogen station, and the entire gas line can be equipped with a safety valve, a pressure regulating valve, a pressure gauge, a gas pipeline, a ball valve, a one-way valve, etc. The gas processing unit 5 is used to purify nitrogen and detect the input pressure of nitrogen, and is composed of a coarse filter, a fine filter, a pressure gauge and a pressure switch. The second pressure regulating unit 6 is composed of a precision pressure regulating valve, a pressure gauge and a pressure switch, etc., and is used to accurately adjust the pressure and flow of the output nitrogen, for example, to control the pressure of the output nitrogen to 0.2-0.5MPa and the flow rate to 50-130Nm 3 / h.

[0022] Optionally, in order to prevent the bubbling system from failing due to a malfunction of the nitrogen supply device 2, a backup nitrogen supply device 1 may also be provided. The backup nitrogen supply device 1 is connected in parallel with the nitrogen supply device 2 via the first pressure regulating unit 3, and is also connected in sequence with the gas processing unit 5 and the second pressure regulating unit 6 along the direction of the nitrogen. The backup nitrogen supply device 1 is generally composed of one or more gas cylinders pre-filled with nitrogen in parallel and / or in series, and the gas circuit is also equipped with a safety valve, a pressure regulating valve, a pressure gauge, a one-way valve, etc. The function of the backup nitrogen supply device 1 is to automatically replenish gas to the bubbling device when the nitrogen supply device 2 fails and cannot deliver gas, and the one-way valve serves to isolate it from the nitrogen supply device 2. The first pressure regulating unit 3 is mainly composed of a manual precision pressure regulating valve and a pressure gauge, which are used to adjust the pressure of the backup nitrogen supply device 1.

[0023] The pipeline between the tetrabutyl titanate supply device 14 and the mixed gas supply device 4 is provided with a first gasification unit 15 and a first flow metering unit 16 which are connected in sequence along the gas flow. The tetrabutyl titanate supply device 14 provides liquid tetrabutyl titanate for the entire bubbling system. The first gasification unit 15 gasifies the liquid tetrabutyl titanate into tetrabutyl titanate gas. The tetrabutyl titanate gas outlet of the first gasification unit 15 is connected to the gas inlet of the mixed gas supply device 4.

[0024] The pipeline between the ethyl orthosilicate supply device 17 and the mixed gas supply device 4 is provided with a second gasification unit 18 and a second flow metering unit 19 which are sequentially connected along the gas flow direction. The ethyl orthosilicate supply device 17 provides liquid ethyl orthosilicate for the entire bubbling system. The second gasification unit 18 gasifies the liquid ethyl orthosilicate into ethyl orthosilicate gas. The ethyl orthosilicate gas outlet of the second gasification unit 18 is connected to the gas inlet of the mixed gas supply device 4.

[0025] Optionally, the tetrabutyl titanate gas outlet of the first gasification unit 15 and the ethyl orthosilicate gas outlet of the second gasification unit 18 can be connected to the mixed gasification clarifier supply device 13 and then connected to the gas inlet of the mixed gas supply device 4. Specifically, the tetrabutyl titanate gas outlet of the first gasification unit 15 and the ethyl orthosilicate gas outlet of the second gasification unit 18 are both connected to the gas inlet of the mixed gasification clarifier supply device 13, and the gas outlet of the mixed gasification clarifier supply device 13 is connected to the gas inlet of the mixed gas supply device 4. The tetrabutyl titanate gas and the ethyl orthosilicate gas are mixed in the mixed gasification clarifier supply device 13 (at a molar ratio of tetrabutyl titanate:ethyl orthosilicate (1-2): (0.3-0.6)) to form a mixed gasification clarifier and then introduced into the mixed gas supply device 4.

[0026] Nitrogen, tetrabutyl titanate gas and ethyl orthosilicate gas all enter and mix in the mixed gas supply device 4. The gas outlet of the mixed gas supply device 4 is connected to the gas outlet of the bubbler 20 in the bubbling device 12, and the mixed gas containing nitrogen, tetrabutyl titanate gas and ethyl orthosilicate gas is introduced into the glass liquid from the bottom of the glass melting furnace.

[0027] Optionally, there are multiple bubbling devices 12, and a flow regulating unit 10 can be set between the mixed gas supply device 4 and each bubbling device 12 as needed, and the number of gas paths of the gas outlet of the mixed gas supply device 4 can correspond to the number of bubbling devices 12. In order to cope with different working conditions, a gas path selection unit 9 can be set between the mixed gas supply device 4 and the flow regulating unit 10. The gas outlet of the mixed gas supply device 4 is divided into two paths and connected to the gas inlet of the gas path selection unit 9, one of which is provided with a third pressure regulating unit 7 for controlling the pressure holding pressure of the gas outlet of the bubbling device, and this gas path becomes the first gas path; the other path is provided with a gas control unit 8, and this gas path becomes the second gas path. When the normal operation of the glass melting furnace requires normal bubbling, the mixed gas enters the bubbling device 12 in the form of pulse gas through the first gas path; when the glass melting furnace is suspended, in order to prevent the glass liquid from flowing back into the bubbling device and causing the bubbling device to be blocked, the mixed gas enters the bubbling device 12 in the form of continuous pressure holding gas through the second gas path. The gas outlet of the gas path selection unit 9 is connected to the gas outlet of the bubbling device 12. The number of gas paths of the gas outlet of the gas path selection unit 9 can correspond to the number of bubbling devices 12. The third pressure regulating unit 7 is composed of a precision pressure regulating valve, a pressure gauge and a pressure switch, etc., and is used to receive, adjust and control the pressure of the mixed gas. The gas control unit 8 is composed of a solenoid valve, a time relay and a distributor, etc., and is used to generate pulse gas. The pulse width is determined by the parameters set by the time relay; a reversing selection switch, a pressure gauge, etc. can be provided on the gas path between the gas path selection unit 9 and the bubbling device 12. The flow regulating unit 10 is composed of a needle valve, a flow display, a one-way check valve, etc., which accurately adjusts the flow of the mixed gas at the gas outlet of each bubbling device and prevents the gas from moving in reverse. By controlling each gas path, the mixed gas that meets the process requirements is accurately delivered to the bubbling device 12 on the gas path.

[0028] The bubbling device 12 is composed of a bubbler 20, a supporting device, a flow switch, a temperature sensor, etc. Figure 2 As shown, the gas outlet of the bubbler 20 is conical and the gas path diameter (or gas outlet aperture) d is 0.8-1.8 mm, so that the glass liquid can form beads but will not fall back into the gas inlet path to block the gas path.

[0029] Optionally, in order to ensure the safe and stable operation and service life of the bubbling device 12, a circulating water cooling unit 11 may be added to the bubbling device 12. The circulating water cooling unit 11 is composed of a cooling water pipe, a closed cooling tower, a temperature gauge, a pressure gauge, a valve, etc. The most common method is to sleeve the air outlet of the bubbling device 12 into the cooling water pipe in the circulating water cooling unit 11 to protect the bubbling device 12 from being corroded and washed by the high-temperature glass liquid and extend its service life.

[0030] In the bubbling system of the utility model, tetrabutyl titanate and ethyl orthosilicate are mixed with nitrogen in gas form after being gasified at high temperature to form a mixed gas. The bubbling device of the bubbling system introduces a mixed gas containing nitrogen, tetrabutyl titanate gas and ethyl orthosilicate gas into the glass liquid. After the mixed gas enters the glass liquid, reactions of formula 1 and formula 2 occur, which can absorb the gas generated by the raw materials of the glass liquid and quickly decompose and generate gas at the same time. The product reduces the viscosity and surface tension of the glass liquid, and the generated bubbles promote the convection of the glass liquid. The bubbling system of the utility model improves the clarification and homogenization effects of the glass liquid from these aspects.

[0031] C 16 H 36 O4Ti+O2→TiO2+CO2(g)+H2O(g) Formula 1

[0032] Si(OC2H5)4+O2→SiO2+CO2(g)+H2O(g) Formula 2

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the content of the present invention.

Claims

1. A bubbling system for a glass melting furnace, characterized in that: The invention comprises a nitrogen supply device (2), a tetrabutyl titanate supply device (14), a tetraethyl orthosilicate supply device (17), a mixed gas supply device (4), a bubbling device (12) and a pipeline for connecting them; the nitrogen supply device (2), the tetrabutyl titanate supply device (14) and the tetraethyl orthosilicate supply device (17) are connected in parallel with each other, and their outlets are all connected with the inlet of the mixed gas supply device, and the outlet of the mixed gas supply device (4) is connected with the bubbling device (12), and the bubbling device (12) is arranged at the bottom of the glass melting furnace and the gas outlet faces the direction of the glass liquid surface; and the invention also comprises a pressure regulating unit, a pressure metering unit, a flow regulating unit, a flow metering unit and a gas processing unit arranged on the pipeline.

2. The bubbling system according to claim 1, characterized in that: A gas processing unit (5) and a second pressure regulating unit (6) which are connected in sequence along the direction of the nitrogen are arranged on the pipeline between the nitrogen supply device (2) and the mixed gas supply device (4).

3. The bubbling system according to claim 2, characterized in that: A first gasification unit (15) and a first flow metering unit (16) which are connected in sequence along the direction of the gas are arranged on the pipeline between the tetrabutyl titanate supply device (14) and the mixed gas supply device (4).

4. The bubbling system according to claim 3, characterized in that: A second gasification unit (18) and a second flow metering unit (19) which are connected in sequence along the direction of the gas are arranged on the pipeline between the ethyl orthosilicate supply device (17) and the mixed gas supply device (4).

5. The bubbling system according to any one of claims 1 to 4, characterized in that: The gas outlet of the mixed gas supply device (4) is connected to the gas outlet of the bubbling device (12), there are multiple bubbling devices (12), the gas outlet of the mixed gas supply device (4) is branched into multiple gas paths and are respectively connected to the gas outlets of the multiple bubbling devices (12), a flow regulating unit (10) is arranged between the gas outlet of the mixed gas supply device (4) and each bubbling device (12), and the number of gas paths corresponds to the number of bubbling devices (12).

6. The bubbling system according to claim 5, characterized in that: A gas path selection unit (9) is also provided between the mixed gas supply device (4) and the flow regulating unit (10); the gas outlet of the mixed gas supply device (4) is branched into two gas paths which are connected to the gas inlet of the gas path selection unit (9); the gas outlet of the gas path selection unit (9) is connected to the gas outlet of the bubbling device (12); and the number of gas paths of the gas outlet of the gas path selection unit (9) corresponds to the number of the bubbling devices (12).

7. The bubbling system according to claim 6, characterized in that: Of the two gas paths of the gas outlet of the mixed gas supply device (4), one path is provided with a third pressure regulating unit (7) for controlling the pressure maintaining pressure of the gas outlet of the bubbling device; and the other path is provided with a gas control unit (8).

8. The bubbling system according to claim 4, characterized in that: A mixed gasification clarifier supply device (13) is further provided between the tetrabutyl titanate gas outlet of the first gasification unit (15), the ethyl orthosilicate gas outlet of the second gasification unit (18), and the gas inlet of the mixed gas supply device (4); the tetrabutyl titanate gas outlet of the first gasification unit (15) and the ethyl orthosilicate gas outlet of the second gasification unit (18) are connected in parallel and are both in communication with the gas inlet of the mixed gasification clarifier supply device (13); and the gas outlet of the mixed gasification clarifier supply device (13) is in communication with the gas inlet of the mixed gas supply device (4).

9. The bubbling system according to claim 8, characterized in that: The bubbling device (12) is provided with a circulating water cooling unit (11).

10. The bubbling system according to claim 9, characterized in that: The gas outlet of the bubbling device (12) is conical and has a gas outlet aperture d of 0.8-1.8 mm.

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