CN114671592B - Intelligent control method for melting temperature field of glass melting furnace - Google Patents
Intelligent control method for melting temperature field of glass melting furnace Download PDFInfo
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- CN114671592B CN114671592B CN202210434372.XA CN202210434372A CN114671592B CN 114671592 B CN114671592 B CN 114671592B CN 202210434372 A CN202210434372 A CN 202210434372A CN 114671592 B CN114671592 B CN 114671592B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/24—Automatically regulating the melting process
Abstract
The invention relates to the technical field of float glass production and manufacturing, in particular to a method for intelligently controlling a melting temperature field of a glass melting furnace. Step S1, fuel quantity of each small furnace is adjusted simultaneously by controlling the total fuel quantity; adjusting the fuel proportion distribution of each small furnace until the melting temperature field of the glass melting furnace is stable; s2, acquiring hot spot temperature change of the glass melting furnace, and adjusting the total fuel amount according to the hot spot temperature change; when the temperature of the hot spot is reduced, the total amount of fuel is increased; when the temperature of the hot spot increases, the total amount of fuel is reduced; step S3, obtaining the moving direction of the bubble boundary line, and adjusting the total fuel amount according to the hot spot temperature change and the moving direction of the bubble boundary line; when the temperature of the hot spot is reduced, the bubble boundary moves towards the direction of the feed inlet, so that the total fuel amount is reduced; when the temperature of the hot spot increases, the bubble boundary moves toward the clear zone, increasing the total fuel quantity.
Description
Technical Field
The invention relates to the technical field of float glass production and manufacturing, in particular to a method for intelligently controlling a melting temperature field of a glass melting furnace.
Background
With the wide application of intelligent technology in the traditional manufacturing industry, the intelligent glass manufacturing is imperative, a glass melting furnace is a heart for glass production, and the control of a melting temperature field of the melting furnace is a core and is also a difficult point. In float glass production, the control of a melting furnace system emphasizes that 'temperature stability, furnace pressure stability, liquid level stability, material pile and bubble boundary line stability', in order to realize operability, the melting furnace system is designed into a plurality of subsystems, such as a furnace pressure control system and a liquid level control system, intelligent control can be realized, but the control of a temperature field and the control of the material pile bubble boundary line do not realize intelligent control yet, manual operation is needed, and compared with original methods by experience field observation and judgment, the labor intensity is high.
The control of the melting temperature field in prior art glass melters has mainly involved two modes. Firstly, a fuel proportion control mode is adopted, fuel is distributed according to the role of each small furnace in the glass melting process, and the total quantity of the fuel is manually adjusted to realize the stabilization of a temperature field. The method has the advantages that the fuel quantity does not need to be independently increased or decreased for each small furnace, the operation is simpler, the method has the defects that the judgment of an operator on a temperature field is relied on, the operator is required to observe on site by experience, and the closed-loop feedback intelligent control cannot be realized. And secondly, in a temperature control mode, the temperature points of the crown corresponding to the small furnaces are respectively selected as key temperature points for control, and each small furnace is independently used for fuel adjustment, so that temperature stability is realized, namely, a single small furnace forms an independent temperature control subsystem. With the temperature control mode, closed-loop control of the temperature and the fuel amount per cell can be achieved, but the fuel amount fluctuates greatly in a short time.
In order to realize intelligent control, the two control modes are combined, and the total amount of fuel is adjusted according to the temperature of a certain small furnace as the temperature of a key point. Although intelligent control can be achieved, a problem arises in that the melting temperature fluctuates greatly.
Disclosure of Invention
The invention aims at: aiming at the problem that the melting temperature greatly fluctuates in the prior art by adopting a mode of adjusting the total fuel quantity by using the key point temperature, the method provides a control method of the melting temperature field of the glass melting furnace, and the method combines the temperature control mode and the bubble boundary control mode to control the total fuel quantity by considering the influence of the movement of the bubble boundary on the temperature control mode, thereby reducing the fluctuation of the melting temperature, being beneficial to realizing intelligent control and achieving the stable glass melting process.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an intelligent control method for a glass melting furnace melting temperature field comprises the following steps,
step S1, controlling the total fuel quantity and simultaneously adjusting the fuel quantity of each small furnace; adjusting the fuel proportion distribution of each small furnace until the melting temperature field of the glass melting furnace is stable; at this time, the hot spot temperature is the standard temperature, and the bubble boundary line position is the standard position;
s2, acquiring hot spot temperature change of the glass melting furnace, and adjusting the total fuel amount according to the hot spot temperature change;
when the temperature of the hot spot is reduced, the total amount of fuel is increased;
when the temperature of the hot spot increases, the total amount of fuel is reduced;
step S3, obtaining the moving direction of the bubble boundary line, and adjusting the total fuel amount according to the hot spot temperature change and the moving direction of the bubble boundary line;
when the temperature of the hot spot is reduced, the bubble boundary moves towards the direction of the feed inlet, so that the total fuel amount is reduced;
when the temperature of the hot spot increases, the bubble boundary moves toward the clear zone, increasing the total fuel quantity.
Firstly, a stable melting temperature field is obtained in a fuel proportion control mode; and then combining the temperature control mode with the fuel proportion control mode to realize the closed-loop feedback control of the hot spot temperature and the total fuel amount. When the total amount of fuel is adjusted according to the temperature change of the hot spot, the temperature change of the melting furnace caused by the adjustment of the fuel cannot be reflected on the temperature of the hot spot in time, so that the problem of great fluctuation of the fuel still exists in a short time.
The inventors have found that the movement of the bubble boundary also has a large influence on the change in the temperature of the hot spot. Taking the example of the reduction of the temperature of the hot spot, after the reduction of the temperature of the hot spot and the increase of the total fuel quantity, the monitored temperature of the hot spot still reduces, and the temperature increase caused by the increase of the total fuel quantity can not be brought about in time. This is mainly because the bubble boundary moves toward the feed port, resulting in a decrease in the hot spot temperature. Therefore, although the hot spot temperature is reduced, the total fuel amount needs to be reduced so as to restore the bubble boundary to the standard position, eliminate the influence of the movement of the bubble boundary on the hot spot temperature, and keep good closed loop feedback of the total fuel amount and the hot spot temperature.
In the prior art, the fuel quantity of each small furnace is controlled by the hot spot temperature of the small furnace. The specific control program parameters are all in the prior art. In step S2, the hot spot temperature and the total fuel amount are closed-loop regulated by using a program in the prior art. The temperature of a fixed measuring point in a hot spot temperature melting furnace is generally selected as the hot spot temperature by a main arch temperature point corresponding to a small furnace. The hot spot temperature is primarily related to fuel heating value, feedstock moisture and ambient temperature.
The interface between the foam region and the interface region in the glass melting furnace is a bubble boundary line. The position of the bubble boundary is related to the raw material composition and the redox performance of the raw material. In the steady state of the melting temperature field, the position of the boundary line between the material pile and the bubble is stable, and the melting condition is good.
As a preferred embodiment of the present invention, in step S3, the hot spot temperature drop occurs after increasing the total amount of fuel; the hot spot temperature rise occurs after the total amount of fuel is reduced.
In a preferred embodiment of the present invention, in step S3, after the bubble boundary line returns to the standard position, the total fuel amount is adjusted according to the change in the hot spot temperature.
In step S2, the temperature change of the crown temperature point corresponding to the small furnace is used as the temperature change of the melting furnace.
As a preferable scheme of the invention, the temperature point of the main arch is the temperature point of the main arch corresponding to the 3# small furnace, the 4# small furnace or the 5# small furnace.
When judging the moving direction of the bubble boundary line, a mode of manually observing from a side breast wall observation port can be adopted, or a mode of taking a picture and then comparing by a manual or machine can be adopted.
As a preferred embodiment of the present invention, the moving direction of the bubble boundary line is obtained by means of manual observation.
As a preferred embodiment of the present invention, the moving direction of the bubble boundary line is obtained by:
acquiring an image of a bubble boundary line in a standard position as a standard image, and acquiring an image of the bubble boundary line in the operation of the glass melting furnace as a contrast image; and comparing the standard image with the comparison image to obtain the moving direction of the bubble boundary line.
The intelligent control system for the melting temperature field of the glass melting furnace comprises a temperature sensor, a bubble boundary line monitoring device, a control device and an adjusting device;
the temperature sensor is electrically connected with the control device and sends a temperature signal to the control device; the bubble boundary line monitoring device is electrically connected with the control device and sends a bubble boundary line position signal to the control device;
the control device comprises a temperature control module, a bubble boundary module and a judging module;
the temperature control module receives a temperature signal of the sensor, and sends a first reduction signal to the judging module when judging that the temperature rises; sending a first increasing signal to the judging module when the temperature is judged to be reduced;
the bubble boundary line module receives the bubble boundary line position signal of the bubble boundary line monitoring device, and sends out a second reduction signal when judging that the bubble boundary line moves towards the feeding port; sending a second increasing signal when the bubble boundary line is judged to move towards the clarification area;
the judging module
When the first reducing signal and the second reducing signal are received, the first reducing signal is used as an executing signal;
when the first increasing signal and the second increasing signal are received, the first increasing signal is used as an executing signal;
when the first increasing signal and the second decreasing signal are received, the second decreasing signal is used as an executing signal;
when the first decreasing signal and the second increasing signal are received, the second increasing signal is used as an executing signal;
and the adjusting device receives the execution signal of the judging module and adjusts the total fuel amount of the melting furnace.
As a preferred aspect of the present invention, the glass melting furnace includes a main fuel pipe and a plurality of fuel branch pipes connected to the main fuel pipe; each fuel branch pipe is connected with a burner of a corresponding small furnace; each fuel branch pipe is provided with a branch pipe valve; the fuel main pipe is provided with a main valve;
the adjusting device is connected with the main valve and used for controlling the opening degree of the main valve.
A glass melting furnace comprises the intelligent control system of the melting temperature field.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. according to the intelligent control method for the glass melting furnace melting temperature field, firstly, a stable melting temperature field is obtained in a fuel proportion control mode, and then, the stable melting temperature field is combined with a temperature control mode, so that closed-loop feedback control of the hot spot temperature and the total fuel amount is realized, and intelligent control is realized. The disadvantage that the total fuel amount adjustment cannot be reflected on the hot spot temperature in time is that when the bubble boundary line moves, the temperature control mode is adjusted in time so as to reduce the fuel fluctuation. The advantages of the fuel ratio control mode, the temperature control mode and the bubble boundary control mode are respectively exerted at different stages. The intelligent control of the melting temperature field is facilitated, and the large fluctuation of fuel is avoided.
2. The intelligent control method of the glass melting furnace melting temperature field or the system obtained by the method can utilize the existing control mode in the equipment in the glass melting furnace transformation process, and is easy to upgrade and transform the existing equipment.
Drawings
FIG. 1 is a schematic view of a glass melting furnace.
1-a feed inlet; 2-a melting zone; 3-a clarification zone; 21-1# mini furnace; a small furnace No. 22-2; 23-3# small furnace; a 24-4# small furnace; a small furnace 25-5# in number;
FIG. 2 is a schematic diagram of a system for intelligent control of the melting temperature field of a glass melting furnace of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
An intelligent control method for a glass melting furnace melting temperature field comprises the following steps,
step S1, controlling the total fuel quantity and simultaneously adjusting the fuel quantity of each small furnace; adjusting the fuel proportion distribution of each small furnace until the melting temperature field of the glass melting furnace is stable; at this time, the hot spot temperature is the standard temperature, and the bubble boundary line position is the standard position;
s2, acquiring hot spot temperature change of the glass melting furnace, and adjusting the total fuel amount according to the hot spot temperature change;
when the temperature of the hot spot is reduced, the total amount of fuel is increased;
when the temperature of the hot spot increases, the total amount of fuel is reduced;
generally, the temperature change of the temperature point of the main crown corresponding to the small furnace is used as the temperature change of the melting furnace. The temperature point of the main arch is the temperature point of the main arch corresponding to the 3# small furnace, the 4# small furnace or the 5# small furnace. The crown temperature point is upstream of the bubble boundary.
As shown in FIG. 1, the glass melting furnace comprises a charging port 1, a melting zone 2 and a clarifying zone 3 which are sequentially connected, wherein the charging port comprises a # 1 small furnace 21, a # 2 small furnace 22, a # 3 small furnace 23, a # 4 small furnace 24 and a # 5 small furnace 25. In the prior art, the fuel quantity of each small furnace is controlled by the hot spot temperature of the small furnace. The specific control program parameters are all in the prior art. In step S2, the hot spot temperature and the total fuel amount are closed-loop regulated by using a program in the prior art. The temperature of a fixed measuring point in a hot spot temperature melting furnace is generally selected as the hot spot temperature by a main arch temperature point corresponding to a small furnace. The hot spot temperature is primarily related to fuel heating value, feedstock moisture and ambient temperature.
The interface between the foam region and the interface region in the glass melting furnace is a bubble boundary line. The position of the bubble boundary is related to the raw material composition and the redox performance of the raw material. In the steady state of the melting temperature field, the position of the boundary line between the material pile and the bubble is stable, and the melting condition is good.
Step S3, obtaining the moving direction of the bubble boundary line, and adjusting the total fuel amount according to the hot spot temperature change and the moving direction of the bubble boundary line;
when the temperature of the hot spot is reduced, the bubble boundary moves towards the direction of the feed inlet, so that the total fuel amount is reduced;
when the temperature of the hot spot increases, the bubble boundary moves toward the clear zone, increasing the total fuel quantity.
Firstly, a stable melting temperature field is obtained in a fuel proportion control mode; and then combining the temperature control mode with the fuel proportion control mode to realize the closed-loop feedback control of the hot spot temperature and the total fuel amount. When the total amount of fuel is adjusted according to the temperature change of the hot spot, the temperature change of the melting furnace caused by the adjustment of the fuel cannot be reflected on the temperature of the hot spot in time, so that the problem of great fluctuation of the fuel still exists in a short time.
The inventors have found that the movement of the bubble boundary also has a large influence on the change in the temperature of the hot spot. Taking the example of the reduction of the temperature of the hot spot, after the reduction of the temperature of the hot spot and the increase of the total fuel quantity, the monitored temperature of the hot spot still reduces, and the temperature increase caused by the increase of the total fuel quantity can not be brought about in time. This is mainly because the bubble boundary moves toward the feed port, resulting in a decrease in the hot spot temperature. Therefore, although the hot spot temperature is reduced, the total fuel amount needs to be reduced so as to restore the bubble boundary to the standard position, eliminate the influence of the movement of the bubble boundary on the hot spot temperature, and keep good closed loop feedback of the total fuel amount and the hot spot temperature.
In step S3, the hot spot temperature drop occurs after increasing the total amount of fuel; the hot spot temperature rise occurs after the total amount of fuel is reduced. In step S3, after the bubble boundary line returns to the standard position, the total fuel amount is adjusted according to the hot spot temperature change.
When judging the moving direction of the bubble boundary line, a mode of manually observing from a side breast wall observation port can be adopted, or a mode of taking a picture and then comparing by a manual or machine can be adopted.
The movement direction of the bubble boundary is obtained by: acquiring an image of a bubble boundary line in a standard position as a standard image, and acquiring an image of the bubble boundary line in the operation of the glass melting furnace as a contrast image; and comparing the standard image with the comparison image to obtain the moving direction of the bubble boundary line.
Because the bubble boundary stabilization does not require addition or subtraction of fuel for one week or more when the furnace is stably produced.
Even through a manual observation mode, the closed loop and automatic control of the hot spot temperature and the total fuel amount are realized.
According to the method, in the reforming process of the melting furnace, devices and facilities used in the existing fuel proportion control mode or temperature control mode can be utilized, parameters are only adjusted, and a fuel supply pipeline is reformed, so that the method can be implemented, and is beneficial to upgrading and reforming of the existing melting furnace equipment.
Example 2
An intelligent control system for a glass melting furnace melting temperature field is shown in fig. 2, and comprises a temperature sensor, a bubble boundary line monitoring device, a control device and an adjusting device;
the temperature sensor is electrically connected with the control device and sends a temperature signal to the control device; the bubble boundary line monitoring device is electrically connected with the control device and sends a bubble boundary line position signal to the control device;
the control device comprises a temperature control module, a bubble boundary module and a judging module;
the temperature control module receives a temperature signal of the sensor, and sends a first reduction signal to the judging module when judging that the temperature rises; sending a first increasing signal to the judging module when the temperature is judged to be reduced;
the bubble boundary line module receives the bubble boundary line position signal of the bubble boundary line monitoring device, and sends out a second reduction signal when judging that the bubble boundary line moves towards the feeding port; sending a second increasing signal when the bubble boundary line is judged to move towards the clarification area;
the judging module is used for judging whether the judgment result is the same as the judgment result,
when the first reducing signal and the second reducing signal are received, the first reducing signal is used as an executing signal;
when the first increasing signal and the second increasing signal are received, the first increasing signal is used as an executing signal;
when the first increasing signal and the second decreasing signal are received, the second decreasing signal is used as an executing signal;
when the first decreasing signal and the second increasing signal are received, the second increasing signal is used as an executing signal;
and the adjusting device receives the execution signal of the judging module and adjusts the total fuel amount of the melting furnace.
The glass melting furnace comprises a fuel main pipe and a plurality of fuel branch pipes connected to the fuel main pipe; each fuel branch pipe is connected with a burner of a corresponding small furnace; each fuel branch pipe is provided with a branch pipe valve; the fuel main pipe is provided with a main valve;
the adjusting device is connected with the main valve and used for controlling the opening degree of the main valve.
Example 3
A glass melting furnace comprising the intelligent melting temperature field control system of example 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A method for intelligently controlling a melting temperature field of a glass melting furnace is characterized by comprising the following steps,
step S1, controlling the total fuel quantity and simultaneously adjusting the fuel quantity of each small furnace; adjusting the fuel proportion distribution of each small furnace until the melting temperature field of the glass melting furnace is stable; at this time, the hot spot temperature is the standard temperature, and the bubble boundary line position is the standard position;
s2, acquiring hot spot temperature change of the glass melting furnace, and adjusting the total fuel amount according to the hot spot temperature change;
when the temperature of the hot spot is reduced, the total amount of fuel is increased;
when the temperature of the hot spot increases, the total amount of fuel is reduced;
taking the temperature change of the temperature point of the main arch corresponding to the small furnace as the temperature change of the melting furnace;
the arch temperature point is upstream of the bubble boundary;
step S3, obtaining the moving direction of the bubble boundary line, and adjusting the total fuel amount according to the hot spot temperature change and the moving direction of the bubble boundary line;
when the temperature of the hot spot is reduced, the bubble boundary moves towards the direction of the feed inlet, so that the total fuel amount is reduced;
when the temperature of the hot spot rises, the bubble boundary moves towards the direction of the clarification area, so that the total fuel amount is increased;
the hot spot temperature drop occurs after increasing the total amount of fuel;
the hot spot temperature rise occurs after a reduction in the total amount of fuel;
after the bubble boundary returns to the standard position, the total fuel amount is adjusted according to the change of the hot spot temperature.
2. The method for intelligently controlling a glass melting furnace melting temperature field according to claim 1, wherein the moving direction of the bubble boundary line is obtained by means of manual observation.
3. The method of intelligent control of a glass melting furnace melting temperature field according to claim 1, wherein the moving direction of the bubble boundary is obtained by:
acquiring an image of a bubble boundary line in a standard position as a standard image, and acquiring an image of the bubble boundary line in the operation of the glass melting furnace as a contrast image; and comparing the standard image with the comparison image to obtain the moving direction of the bubble boundary line.
4. An intelligent control system for the melting temperature field of a glass melting furnace, obtained according to the method of any one of claims 1 to 3, characterized in that it comprises a temperature sensor, a bubble boundary monitoring device, a control device and an adjustment device;
the temperature sensor is electrically connected with the control device and sends a temperature signal to the control device; the bubble boundary line monitoring device is electrically connected with the control device and sends a bubble boundary line position signal to the control device;
the control device comprises a temperature control module, a bubble boundary module and a judging module;
the temperature control module receives a temperature signal of the sensor, and sends a first reduction signal to the judging module when judging that the temperature rises; sending a first increasing signal to the judging module when the temperature is judged to be reduced;
the bubble boundary line module receives the bubble boundary line position signal of the bubble boundary line monitoring device, and sends out a second reduction signal when judging that the bubble boundary line moves towards the feeding port; sending a second increasing signal when the bubble boundary line is judged to move towards the clarification area;
the judging module is used for judging whether the judgment result is the same as the judgment result,
when the first reducing signal and the second reducing signal are received, the first reducing signal is used as an executing signal;
when the first increasing signal and the second increasing signal are received, the first increasing signal is used as an executing signal;
when the first increasing signal and the second decreasing signal are received, the second decreasing signal is used as an executing signal;
when the first decreasing signal and the second increasing signal are received, the second increasing signal is used as an executing signal;
and the adjusting device receives the execution signal of the judging module and adjusts the total fuel amount of the melting furnace.
5. The intelligent control system for a glass melting furnace melting temperature field according to claim 4, wherein,
the glass melting furnace comprises a fuel main pipe and a plurality of fuel branch pipes connected to the fuel main pipe; each fuel branch pipe is connected with a burner of a corresponding small furnace; each fuel branch pipe is provided with a branch pipe valve; the fuel main pipe is provided with a main valve;
the adjusting device is connected with the main valve and used for controlling the opening degree of the main valve.
6. A glass melting furnace comprising the intelligent melting temperature field control system of claim 4 or 5.
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| CN210481189U (en) * | 2019-09-11 | 2020-05-08 | 成都南玻玻璃有限公司 | Mixed combustion-supporting glass melting furnace |
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2022
- 2022-04-24 CN CN202210434372.XA patent/CN114671592B/en active Active
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| WO2002048057A1 (en) * | 2000-12-14 | 2002-06-20 | Software & Technologie Glas Gmbh Cottbus | Method for measurement and control of quality-determining parameters for the raw smelt in glass furnaces |
| CN109437515A (en) * | 2018-11-28 | 2019-03-08 | 乔治洛德方法研究和开发液化空气有限公司 | A kind of method of foam position on regulation glass melt surface |
| CN109489768A (en) * | 2018-11-28 | 2019-03-19 | 乔治洛德方法研究和开发液化空气有限公司 | Monitor the system and method and glass furnace of foam line position on glass melt surface |
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