CN105967504A - Ultra-thin float glass production line tin bath protective gas intelligent control system - Google Patents
Ultra-thin float glass production line tin bath protective gas intelligent control system Download PDFInfo
- Publication number
- CN105967504A CN105967504A CN201610081137.3A CN201610081137A CN105967504A CN 105967504 A CN105967504 A CN 105967504A CN 201610081137 A CN201610081137 A CN 201610081137A CN 105967504 A CN105967504 A CN 105967504A
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- CN
- China
- Prior art keywords
- gas
- control system
- tin bath
- production line
- float glass
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
- C03B18/22—Controlling or regulating the temperature of the atmosphere above the float tank
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention discloses an ultra-thin float glass production line tin bath protective gas intelligent control system. intelligent control system comprises a hydrogen supply pipeline, an oxygen supply pipe and a mixing gas loop; a pressure transmitter, a temperature sensor, a flow transmitter, an electric regulating valve, and a pneumatic intercepting valve are respectively arranged on the hydrogen supply pipeline and the oxygen supply pipeline in order, a gas purity analyzer is arranged in the mixing gas loop; the pressure transmitter, the temperature sensor, the flow transmitter, the electric regulating valve, and the pneumatic intercepting valve and the gas purity analyzer are respectively connected with a PLC controller, and a DCS controller is connected with the PLC controller. According to the invention, the gas purity analyzer is used for accurately analyzing the hydrogen content, safety production coefficient is increased, and the gas flow entering into the tin bath can be accurately controlled through control of PID.
Description
Technical field
The present invention relates to automation field, the automatic control system that a kind of floatation glass production line protection molten tin bath tin liquor is not oxidized.
Background technology
So-called thin float glass is for simple glass, thickness is at the glass of below 1.5mm, because it has the plurality of advantages such as transmitance height, surfacing, hardness is high, chemical stability is good, it is widely used in electronics, solar energy, the different industries such as instrument and medical glass.Thin float glass is higher than the requirement of other float glasses, belongs to one of forefront and most advanced and sophisticated technical field in international glass industry.Therefore wanting purity and the purity of tin liquor of gas in strict control flume, effectively preventing the oxidation of tin liquor and sulfuration is very important link.Traditional method provides inert protection gas nitrogen and hydrogen to molten tin bath.Nitrogen keeps the pressure-fired in molten tin bath, makes the gas of extraneous gas and annealing kiln not enter molten tin bath.Hydrogen makes the atmosphere of molten tin bath can remove the oxygen in molten tin bath with certain reproducibility, hydrogen, becomes water vapour hydrogen and also contributes to the stannum oxide generated to be reduced into element tin.But the content being passed through nitrogen and hydrogen is the amount by flow and conversion pressure, the content of the actual gas being passed through in molten tin bath and the content application condition of measurement are big, have a strong impact on the yield rate of ultra-thin glass.Tin tank shielded gas intelligence control system is sent to control unit by special gas purity analyser and measurement data, thus the protective gas content in more precise control molten tin bath.
Summary of the invention
The present invention be directed to defect and the deficiency of prior art, a kind of thin float glass production line tin tank shielded gas intelligence control system is provided for guaranteeing production safety, can be according to the more flexible control gas content of operating mode in molten tin bath.
Technical scheme is as follows:
Thin float glass production line tin tank shielded gas intelligence control system, include the hydrogen feed pipe road accessed in molten tin bath, oxygen feeding pipe road, mixed gas loop, hydrogen feed pipe road, pressure transmitter it is sequentially installed with respectively on oxygen feeding pipe road, temperature sensor, flow transmitter, electric control valve, pneumatic block valve, mixed gas loop is provided with gas purity analyser, pressure transmitter, temperature sensor, flow transmitter, electric control valve, pneumatic block valve, gas purity analyser is connected respectively to PLC, PLC connects host computer station.
Described pressure transmitter, temperature sensor are externally connected with host computer station.
The operation principle of each device of the present invention is as follows:
1, pressure transmitter, effect is the pressure measuring import hydrogen nitrogen, and shows on host computer, and operator can be with remote monitor N2 、H2Pressure, and prepare for the compensation of its flow pressure.
2, temperature sensor, measures the temperature of import nitrogen hydrogen, and shows on host computer, and operator can be with remote monitor N2 、H2 Temperature, and prepare for its flow temperature-compensating.
3, flow transmitter, measures N2、H2Flow, and according to the temperature and pressure value of gas, be converted into the flow entering gas within molten tin bath of reality.
Electric control valve: control N2、H2 Flow, makes the flow value of the gas within entrance molten tin bath reach setting value by PID regulation.
4, gas purity analyser, gas purity analyser is to use high sensitivity, the unattenuated thermal conductivity sensor of low heat capacity to detect a kind of gas analyser of hydrogen nitrogen concentration, inside there is a microprocessor to provide signal processing and temperature-compensating, and by Profibus bus and PLC is safe, quickly realize the exchange of signal and data measured value.
5, pneumatic block valve, mainly controls being passed through and blocking of hydrogen, if hydrogen content is higher than being actually needed value in molten tin bath, the logical pneumatic block valve of hydrogen disconnects, and puts the pneumatic block valve of hydrogen and opens, if under normal circumstances, the logical pneumatic block valve of hydrogen is opened, and puts the pneumatic block valve of hydrogen and disconnects.
6, pneumatic circuit is mixed gas incoming gas purity analysis instrument by sample connection.
7, PLC: it is the core of control system, Main Function is that the signal of first device collection is processed, and field apparatus sends instruction as requested, and real-time measurement data is sent to upper station.Its Main Function is in this invention: (1) accepts the hydrogen content signal that gas purity analyser is measured, and this signal is sent to host computer, allows the hydrogen content that operator can monitor in molten tin bath in real time.(2) if in the case of measuring that hydrogen content in molten tin bath is high and diffusing setting value with hydrogen, automatically sending order, closing the logical pneumatic block valve of hydrogen, open and put the pneumatic block valve of hydrogen.(3) hydrogen is diffused setting value and can be modified by operator station according to operating mode in kiln.(4) control N2, H2 that PID closed loop actual time safety is stable is passed through
Flow.
Advantages of the present invention is: (1) uses gas purity analyser can analyze hydrogen content more accurately, improves safety in production coefficient.(2) using double gas circuit block valve to control, double insurance ensures production safety.(3) set through host computer and can freely change and diffuse setting value, so can be according to the more flexible control gas content of operating mode in molten tin bath.(4) control more precise control by PID and enter the gas flow of molten tin bath.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
See accompanying drawing, thin float glass production line tin tank shielded gas intelligence control system, include the hydrogen feed pipe road 2 accessed in molten tin bath 1, oxygen feeding pipe road 3, mixed gas loop 4, hydrogen feed pipe road 2, pressure transmitter 5 it is sequentially installed with respectively on oxygen feeding pipe road 3, temperature sensor 6, flow transmitter 7, electric control valve 8, pneumatic block valve 9, mixed gas loop 4 is provided with gas purity analyser 10, pressure transmitter 5, temperature sensor 6, flow transmitter 7, electric control valve 8, pneumatic block valve 9, gas purity analyser 10 is connected respectively to PLC 11, PLC 11 connects DCS controller 12, pressure transmitter, temperature sensor is externally connected with host computer station.
Claims (2)
1. thin float glass production line tin tank shielded gas intelligence control system, it is characterized in that, include the hydrogen feed pipe road accessed in molten tin bath, oxygen feeding pipe road, mixed gas loop, hydrogen feed pipe road, pressure transmitter it is sequentially installed with respectively on oxygen feeding pipe road, temperature sensor, flow transmitter, electric control valve, pneumatic block valve, mixed gas loop is provided with gas purity analyser, pressure transmitter, temperature sensor, flow transmitter, electric control valve, pneumatic block valve, gas purity analyser is connected respectively to PLC, PLC connects host computer station.
Thin float glass production line tin tank shielded gas intelligence control system the most according to claim 1, it is characterised in that described pressure transmitter, temperature sensor are externally connected with host computer station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081137.3A CN105967504A (en) | 2016-02-03 | 2016-02-03 | Ultra-thin float glass production line tin bath protective gas intelligent control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081137.3A CN105967504A (en) | 2016-02-03 | 2016-02-03 | Ultra-thin float glass production line tin bath protective gas intelligent control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105967504A true CN105967504A (en) | 2016-09-28 |
Family
ID=56988974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610081137.3A Pending CN105967504A (en) | 2016-02-03 | 2016-02-03 | Ultra-thin float glass production line tin bath protective gas intelligent control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105967504A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081558A (en) * | 2018-10-22 | 2018-12-25 | 中国建材国际工程集团有限公司 | A kind of optimal control method of float glass forming process |
| CN112794628A (en) * | 2021-01-14 | 2021-05-14 | 河北光兴半导体技术有限公司 | Tin bath device |
| CN113336423A (en) * | 2021-05-11 | 2021-09-03 | 中建材佳星玻璃(黑龙江)有限公司 | Production process of float glass without hydrogen station |
| WO2024076400A1 (en) * | 2022-10-04 | 2024-04-11 | Air Products And Chemicals, Inc. | Method and system for controlling a tin bath atmosphere for the reduction of surface defects |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332763A (en) * | 1964-10-16 | 1967-07-25 | Ford Motor Co | Process for manufacture of glass |
| CN204434466U (en) * | 2015-02-02 | 2015-07-01 | 海南中航特玻科技有限公司 | A kind of device of simulating float shaping |
| CN104803583A (en) * | 2015-05-09 | 2015-07-29 | 蚌埠玻璃工业设计研究院 | Tin bath pollution gas isolation device |
| CN204752941U (en) * | 2015-06-16 | 2015-11-11 | 威海拓展纤维有限公司 | Carbide furnace protective gas automatic control device |
-
2016
- 2016-02-03 CN CN201610081137.3A patent/CN105967504A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332763A (en) * | 1964-10-16 | 1967-07-25 | Ford Motor Co | Process for manufacture of glass |
| CN204434466U (en) * | 2015-02-02 | 2015-07-01 | 海南中航特玻科技有限公司 | A kind of device of simulating float shaping |
| CN104803583A (en) * | 2015-05-09 | 2015-07-29 | 蚌埠玻璃工业设计研究院 | Tin bath pollution gas isolation device |
| CN204752941U (en) * | 2015-06-16 | 2015-11-11 | 威海拓展纤维有限公司 | Carbide furnace protective gas automatic control device |
Non-Patent Citations (2)
| Title |
|---|
| 于培霞等: "《大型浮法玻璃生产装置及其施工》", 31 May 2010, 中国轻工业出版社 * |
| 王超等: "保护气体的测试即分析", 《玻璃》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081558A (en) * | 2018-10-22 | 2018-12-25 | 中国建材国际工程集团有限公司 | A kind of optimal control method of float glass forming process |
| CN112794628A (en) * | 2021-01-14 | 2021-05-14 | 河北光兴半导体技术有限公司 | Tin bath device |
| CN113336423A (en) * | 2021-05-11 | 2021-09-03 | 中建材佳星玻璃(黑龙江)有限公司 | Production process of float glass without hydrogen station |
| WO2024076400A1 (en) * | 2022-10-04 | 2024-04-11 | Air Products And Chemicals, Inc. | Method and system for controlling a tin bath atmosphere for the reduction of surface defects |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160928 |