阅读说明：本技术 玻璃窑炉温度稳定性的控制系统及控制方法 (Control system and control method for temperature stability of glass kiln ) 是由 韩军 张增强 王艳辉 李�远 任士芳 田鹏 张顶 刘彬 于 2021-07-30 设计创作，主要内容包括：本发明提供一种玻璃窑炉温度稳定性的控制系统及控制方法。所述控制系统包括：管路保温罩,封罩输送管路以形成保温腔；腔内温度获取单元,实时获取保温腔内的腔内温度值；送气装置,向保温腔内输送气体并根据温度调节信号调节输送气体的温度；温度控制单元,根据腔内温度值输出温度调节信号到送气装置；碹顶温度获取单元,实时获取玻璃窑炉碹顶的碹顶温度值；DCS燃烧控制单元,根据碹顶温度值调节输送管路送入玻璃窑炉的燃气量。本发明通过稳定保温腔内的温度值,避免送入玻璃窑炉内的燃气量发生波动,从而稳定玻璃窑炉内的温度值,同时将玻璃窑炉内的温度控制在满足玻璃窑炉内玻璃液的熔解要求的预设碹顶温度,提高了玻璃窑炉内玻璃液的熔解质量。(The invention provides a control system and a control method for temperature stability of a glass kiln. The control system includes: the pipeline heat-insulation cover is used for sealing the conveying pipeline to form a heat-insulation cavity; the temperature acquisition unit in the cavity acquires the temperature value in the cavity in the heat preservation cavity in real time; the gas supply device is used for supplying gas into the heat preservation cavity and adjusting the temperature of the supplied gas according to the temperature adjusting signal; the temperature control unit outputs a temperature adjusting signal to the air supply device according to the temperature value in the cavity; the arch top temperature acquisition unit is used for acquiring an arch top temperature value of the arch top of the glass kiln in real time; and the DCS combustion control unit adjusts the gas quantity sent into the glass kiln by the conveying pipeline according to the crown top temperature value. The invention stabilizes the temperature value in the glass kiln by stabilizing the temperature value in the heat preservation cavity and avoiding the fluctuation of the gas quantity sent into the glass kiln, thereby stabilizing the temperature value in the glass kiln, simultaneously controlling the temperature in the glass kiln to be the preset crown top temperature meeting the melting requirement of the glass liquid in the glass kiln and improving the melting quality of the glass liquid in the glass kiln.)

1. A control system for the temperature stability of a glass kiln fed with fuel gas by a feed line (10), characterized in that it comprises:

the pipeline heat-insulating cover (1) is provided with a through hole and a plurality of air feeding ports, the pipeline heat-insulating cover (1) covers the conveying pipeline (10) to form a heat-insulating cavity, and the conveying pipeline (10) penetrates through the through hole to be communicated with a fuel gas feeding port of the glass kiln;

the temperature acquisition unit in the cavity is arranged in the heat preservation cavity and used for acquiring the temperature value in the cavity in the heat preservation cavity in real time;

the gas outlet of the gas supply device (2) is communicated with the plurality of gas supply ports on the pipeline heat-insulation cover (1) and is used for supplying gas into the heat-insulation cavity through the plurality of gas supply ports, and the gas supply device (2) is used for adjusting the temperature of the supplied gas according to a temperature adjusting signal;

the temperature control unit is connected with the air supply device (2) and the cavity temperature acquisition unit and used for outputting a temperature adjusting signal to the air supply device (2) according to the cavity temperature value so as to control the cavity temperature value within a first temperature interval;

the arch top temperature acquisition unit is arranged at the top of the glass kiln and is used for acquiring an arch top temperature value of the arch top of the glass kiln in real time;

and the DCS combustion control unit is connected with the arch top temperature acquisition unit and is used for adjusting the gas quantity sent into the glass kiln by the conveying pipeline (10) according to the arch top temperature value so as to control the arch top temperature value to be at a preset arch top temperature.

2. The control system according to claim 1, wherein the intracavity temperature acquiring unit includes:

the temperature sensors (3) are distributed in the heat-insulating cavity and used for detecting local temperatures of a plurality of positions in the heat-insulating cavity to obtain a plurality of local temperature values;

the temperature control unit is connected with the plurality of temperature sensors (3) and used for calculating the average value of the plurality of local temperature values to serve as the temperature value in the cavity.

3. The control system of claim 1, further comprising:

the pressure sensor (4) is arranged in the heat preservation cavity and used for detecting the gas pressure in the cavity in the heat preservation cavity in real time;

the temperature control unit is also connected with a pressure sensor (4) and used for determining the temperature value in the cavity according to the gas pressure in the cavity, outputting a temperature adjusting signal to the gas supply device (2) according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation.

4. The control system of claim 1, wherein the punt temperature acquisition unit comprises:

the thermocouple devices (5) are distributed at the top of the glass kiln, and the detection end of each thermocouple device (5) extends into the glass kiln and is used for detecting the local temperatures of a plurality of positions of the arch of the glass kiln so as to obtain a plurality of arch local temperature values;

the temperature control unit is connected with a plurality of thermocouples (5) and is used for calculating the average value of a plurality of arch top local temperature values as the arch top temperature value.

5. The control system of claim 4, further comprising:

and the heat insulation cover (6) is arranged at the top of the glass kiln and covers the exposed end of the thermocouples (5) exposed outside the glass kiln.

6. A control method of the temperature stability of a glass kiln, carried out with a control system according to any one of claims 1 to 5, the glass kiln being fed with fuel gas by a feed line (10), characterized in that it comprises:

acquiring a cavity temperature value in a heat preservation cavity and an arch top temperature value of the arch top of the glass kiln in real time;

controlling the temperature of the gas delivered into the heat preservation cavity by the gas delivery device (2) according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval;

and adjusting the gas quantity sent into the glass kiln by the conveying pipeline (10) according to the arch top temperature value so as to control the arch top temperature value at a preset arch top temperature.

7. The control method of claim 6, wherein obtaining the intra-cavity temperature value within the insulated cavity comprises:

local temperatures of a plurality of positions in the heat-insulating cavity are detected by a plurality of temperature sensors (3) distributed in the heat-insulating cavity, so that a plurality of local temperature values are obtained;

and calculating the average value of the local temperature values as the temperature value in the cavity.

8. The control method as claimed in claim 6, wherein the obtaining of the crown temperature value of the crown of the glass kiln comprises:

detecting local temperatures of a plurality of positions of the arch top of the glass kiln by a plurality of thermocouples (5) distributed at the top of the glass kiln to obtain a plurality of arch top local temperature values;

and calculating the average value of the plurality of arch top local temperature values as the arch top temperature value.

9. The control method according to claim 6, characterized by further comprising:

acquiring the gas pressure in the cavity in the heat preservation cavity in real time;

the temperature value in the cavity is determined according to the gas pressure in the cavity, the temperature of the gas conveyed to the heat preservation cavity by the gas supply device (2) is controlled according to the temperature value in the cavity, so that the temperature value in the cavity is controlled within a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation.

10. The control method as claimed in claim 6, wherein the adjusting the amount of gas fed into the glass kiln by the delivery line (10) according to the crown temperature value to control the crown temperature value at a preset crown temperature comprises:

if the difference value between the crown top temperature value and the preset crown top temperature is within a preset temperature range, the DCS combustion control unit adjusts the gas quantity sent into the glass kiln by the conveying pipeline (10) according to the difference value;

and if the difference value between the arch top temperature value and the preset arch top temperature is not within the preset temperature range, converting the arch top temperature control mode into a manual control mode.

Technical Field

The invention relates to the field of production of medical glass products, in particular to a control system and a control method for temperature stability of a glass kiln.

Background

In the process of packaging medicines, medicines interact with a packaging material after a certain time, so that the curative effect of the medicines is problematic or side effect occurs.

The requirement of the medium borosilicate glass on the temperature in the production process is very strict, and the medium borosilicate glass has the characteristics of high melting temperature, easy delamination of glass liquid, easy volatilization of boron oxide, difficult clarification and the like, so that in the production process of medium borosilicate glass products, in order to ensure that the glass liquid can be fully melted and the quality of the melted glass liquid is stable, a total oxygen combustion system and an electric boosting system are required to be used for double heating so as to ensure that the space temperature in a glass kiln and the temperature of the glass liquid meet the temperature requirement required by the process production, in the production, the space temperature in the glass kiln needs to reach more than 1580 ℃, the temperature of the glass liquid in the kiln is more than 1600 ℃, a combustion system of the glass kiln respectively supplies natural gas and oxygen to each combustion gun through a main disc and a branch disc so as to heat the glass kiln, the melting of ingredients in the glass kiln is realized so as to form the glass liquid, and the combustion system of the glass kiln conveys the natural gas and the oxygen through pipelines, the natural gas and the oxygen which are conveyed are influenced by the external environment temperature in the process of conveying the natural gas and the oxygen, the air supply quantity of the glass kiln is changed due to the expansion caused by heat and the contraction caused by cold, the temperature in the glass kiln is abnormally fluctuated, and simultaneously, in the process of detecting the temperature in the glass kiln, the temperature detection device in the kiln is influenced by the external environment temperature, so that the detected temperature in the glass kiln is deviated, the temperature in the glass kiln cannot be timely adjusted by an operator, the actual temperature in the glass kiln does not meet the working requirement, and when the temperature in the glass kiln fluctuates greatly, parameters such as the kiln pressure and the liquid level in the glass kiln are also affected, which causes the melting quality of the molten glass in the glass kiln to be reduced, and affects the quality of the finally formed medium borosilicate glass product.

Disclosure of Invention

The embodiment of the invention aims to provide a control system and a control method for temperature stability of a glass kiln, which are used for solving the problem that in the prior art, the quality of glass products is influenced because the melting quality of molten glass in the glass kiln is reduced due to the change of process parameters in the production process of the glass products caused by unstable temperature in the glass kiln in the production process of the borosilicate glass products.

In order to achieve the above object, in a first aspect of the present invention, there is provided a control system for temperature stability of a glass furnace, the glass furnace being supplied with fuel gas by a supply line, the control system comprising: the pipeline heat-insulation cover is provided with a through hole and a plurality of air supply ports, the pipeline heat-insulation cover covers the conveying pipeline to form a heat-insulation cavity, and the conveying pipeline penetrates through the through hole to be communicated with a gas feed port of the glass kiln; the temperature acquisition unit in the cavity is arranged in the heat preservation cavity and used for acquiring the temperature value in the cavity in the heat preservation cavity in real time; the gas outlet of the gas supply device is communicated with the plurality of gas supply ports on the pipeline heat-insulation cover and is used for supplying gas into the heat-insulation cavity through the plurality of gas supply ports, and the gas supply device is used for adjusting the temperature of the supplied gas according to a temperature adjusting signal; the temperature control unit is connected with the air supply device and the cavity temperature acquisition unit and used for outputting a temperature adjusting signal to the air supply device according to the cavity temperature value so as to control the cavity temperature value within a first temperature interval; the arch top temperature acquisition unit is arranged at the top of the glass kiln and is used for acquiring an arch top temperature value of the arch top of the glass kiln in real time; and the DCS combustion control unit is connected with the arch top temperature acquisition unit and is used for adjusting the gas quantity sent into the glass kiln by the conveying pipeline according to the arch top temperature value so as to control the arch top temperature value at a preset arch top temperature.

Specifically, the intracavity temperature acquiring unit includes: the temperature sensors are distributed in the heat-insulating cavity and used for detecting local temperatures of a plurality of positions in the heat-insulating cavity to obtain a plurality of local temperature values; the temperature control unit is connected with the plurality of temperature sensors and used for calculating the average value of the plurality of local temperature values to serve as the temperature value in the cavity.

Specifically, the control system further includes: the pressure sensor is arranged in the heat insulation cavity and used for detecting the gas pressure in the cavity in the heat insulation cavity in real time; the temperature control unit is also connected with a pressure sensor and used for determining the temperature value in the cavity according to the gas pressure in the cavity, outputting a temperature adjusting signal to the gas supply device according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation.

Specifically, the arch crown temperature acquisition unit includes: the thermocouple is distributed at the top of the glass kiln, and the detection end of each thermocouple extends into the glass kiln and is used for detecting the local temperatures of a plurality of positions of the arch top of the glass kiln so as to obtain a plurality of arch top local temperature values; the temperature control unit is connected with the thermocouples and is used for calculating the average value of the local temperature values of the plurality of crowns as the crown temperature value.

Specifically, the control system further includes: and the heat insulation cover is arranged at the top of the glass kiln and covers the exposed ends of the thermocouples exposed outside the glass kiln.

In another aspect of the present invention, a method for controlling temperature stability of a glass kiln is further provided, which is implemented by using any one of the control systems described above, wherein the glass kiln is conveyed by a conveying pipeline to convey fuel gas, and the method comprises: acquiring a cavity temperature value in a heat preservation cavity and an arch top temperature value of the arch top of the glass kiln in real time; controlling the temperature of the gas delivered into the heat preservation cavity by the gas delivery device according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval; and adjusting the gas quantity sent into the glass kiln by the conveying pipeline according to the arch top temperature value so as to control the arch top temperature value to be at a preset arch top temperature.

Specifically, acquire the intracavity temperature value in the heat preservation intracavity, include: detecting local temperatures of a plurality of positions in the heat-insulating cavity through a plurality of temperature sensors distributed in the heat-insulating cavity to obtain a plurality of local temperature values; and calculating the average value of the local temperature values as the temperature value in the cavity.

Specifically, the method for acquiring the arch top temperature value of the arch top of the glass kiln comprises the following steps: detecting local temperatures of a plurality of positions of the arch top of the glass kiln by a plurality of thermocouples distributed at the top of the glass kiln to obtain a plurality of arch top local temperature values; and calculating the average value of the plurality of arch top local temperature values as the arch top temperature value.

Specifically, the control method further includes: acquiring the gas pressure in the cavity in the heat preservation cavity in real time; the temperature value in the cavity is determined according to the gas pressure in the cavity, the temperature of the gas conveyed to the cavity by the gas supply device is controlled according to the temperature value in the cavity, so that the temperature value in the cavity is controlled in a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation.

Specifically, the adjusting the gas quantity sent into the glass kiln by the conveying pipeline according to the arch top temperature value so as to control the arch top temperature value at a preset arch top temperature comprises the following steps: if the difference value between the crown temperature value and the preset crown temperature is within a preset temperature range, the DCS combustion control unit adjusts the gas quantity sent into the glass kiln by the conveying pipeline according to the difference value; and if the difference value between the arch top temperature value and the preset arch top temperature is not within the preset temperature range, converting the arch top temperature control mode into a manual control mode.

The invention provides a control system and a control method for temperature stability of a glass kiln.A conveying pipeline for conveying fuel gas is sealed and covered by a pipeline heat-insulating cover to form a heat-insulating cavity, so that the temperature in the heat-insulating cavity where the conveying pipeline is located is convenient to control, the temperature in the heat-insulating cavity is adjusted to provide proper conveying temperature for the conveying pipeline, the condition that the fuel gas conveyed in the conveying pipeline expands with heat and contracts with cold due to the influence of the external environment temperature in the heat-insulating cavity in the fuel gas conveying process is avoided, the fluctuation of the fuel gas quantity conveyed into the glass kiln is caused, the stability of the temperature in the glass kiln is influenced, in order to stabilize the temperature in the glass kiln and stabilize the temperature in the glass kiln at a preset arch top temperature, on one hand, after the temperature value in the heat-insulating cavity is obtained, the temperature value of the gas conveyed into the heat-insulating cavity by an air supply device is adjusted according to the temperature value in the cavity, and the temperature value in the heat-insulating cavity is controlled in a first temperature interval, thereby provide suitable delivery temperature for the transfer line, avoid the gas in the transfer line to cause because of the external environment temperature change to carry into the glass kiln internal combustion gas volume and take place to fluctuate, ensure the stability of the interior temperature of glass kiln, on the other hand satisfies the melting requirement of glass liquid in the glass kiln on the stable basis in order to ensure the temperature in the glass kiln, adjust the transfer line according to the gas volume of sending into in the glass kiln of the arch top temperature value that obtains, thereby make the temperature in the glass kiln maintain predetermine the arch top temperature, avoid the gas volume not enough to lead to the problem that the glass liquid melting quality is low.

According to the control system and the control method for the temperature stability of the glass kiln, disclosed by the invention, the fluctuation of the gas quantity sent into the glass kiln by the conveying pipeline is avoided by stabilizing the temperature value in the heat preservation cavity, so that the temperature value in the glass kiln is stabilized, and meanwhile, the temperature in the glass kiln is controlled at the preset crown temperature meeting the melting requirement of the glass liquid in the glass kiln, so that the melting quality of the glass liquid in the glass kiln is improved, and the quality of a final glass product is ensured.

Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:

FIG. 1 is a cross-sectional view of a control system for temperature stability of a glass furnace provided by the present invention;

FIG. 2 is a schematic view of the thermocouple installation in the control system for temperature stability of a glass furnace according to the present invention;

fig. 3 is a schematic view from a different perspective of fig. 1.

Description of the reference numerals

1 pipeline heat preservation cover 2 air supply device

3 temperature sensor 4 pressure sensor

5 thermocouple 6 thermal insulation cover

10 conveying pipeline 11 support

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, and bottom" is generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.

The invention provides a control system for the temperature stability of a glass kiln, and figure 1 is a sectional view of the control system for the temperature stability of the glass kiln; as shown in fig. 1, the glass kiln is supplied with fuel gas by a supply line 10, and the control system comprises: the pipeline heat-insulating cover 1 is provided with a through hole and a plurality of air supply ports, the pipeline heat-insulating cover 1 covers the conveying pipeline 10 to form a heat-insulating cavity, and the conveying pipeline 10 penetrates through the through hole to be communicated with a gas feed port of the glass kiln; the temperature acquisition unit in the cavity is arranged in the heat preservation cavity and used for acquiring the temperature value in the cavity in the heat preservation cavity in real time; the gas supply device 2 is provided with a gas outlet communicated with the plurality of gas supply ports on the pipeline heat-insulating cover 1 and used for supplying gas into the heat-insulating cavity through the plurality of gas supply ports, and the gas supply device 2 is used for adjusting the temperature of the supplied gas according to a temperature adjusting signal; the temperature control unit is connected with the air supply device 2 and the cavity temperature acquisition unit and used for outputting a temperature adjusting signal to the air supply device 2 according to the cavity temperature value so as to control the cavity temperature value within a first temperature interval; the arch top temperature acquisition unit is arranged at the top of the glass kiln and is used for acquiring an arch top temperature value of the arch top of the glass kiln in real time; and the DCS combustion control unit is connected with the arch top temperature acquisition unit and is used for adjusting the gas quantity sent into the glass kiln by the conveying pipeline 10 according to the arch top temperature value so as to control the arch top temperature value at a preset arch top temperature.

According to the control system for the temperature stability of the glass kiln, the conveying pipeline 10 is sealed by the pipeline heat-insulating cover 1 to form a heat-insulating cavity, the conveying pipeline 10 is communicated with the fuel gas feed inlet of the glass kiln through the through hole formed in the pipeline heat-insulating cover 1, and the temperature value in the heat-insulating cavity is controlled within the first temperature interval, so that the phenomenon that fuel gas expands with heat and contracts with cold due to the influence of the temperature in the heat-insulating cavity can be avoided in the process of conveying the fuel gas by the conveying pipeline 10, the fuel gas quantity conveyed into the glass kiln by the conveying pipeline 10 cannot fluctuate, the fed fuel gas quantity is always kept stable, the temperature in the glass kiln is ensured to be stable, and the process parameters of glass products caused by the temperature fluctuation in the glass kiln in the production process of the medium borosilicate glass products are avoided. The first temperature interval is preferably 27-21 ℃, preferably, the temperature in the heat preservation cavity is controlled to be 27 ℃ in summer, and the temperature in the heat preservation cavity is controlled to be 21 ℃ in winter, so that the gas temperature can not fluctuate greatly in the process of conveying the gas by the conveying pipeline 10 in different seasons, the frequent thermal expansion and cold contraction in the gas conveying process is avoided, the stable gas amount conveyed into the glass kiln is ensured, and the stability of the temperature in the glass kiln is ensured.

In the production process of the medium borosilicate glass product, in order to improve the melting quality of molten glass and ensure the quality of the glass product, an arch top temperature acquisition unit acquires an arch top temperature value of the arch top of a glass kiln in real time, a Distributed Control System (DCS) combustion control unit adjusts the gas quantity sent into the glass kiln by a conveying pipeline 10 according to the arch top temperature value, so that the temperature value in the glass kiln is controlled at a preset arch top temperature meeting the melting requirement of the molten glass in the glass kiln, the preset arch top temperature can be between 1585 ℃ and 1595 ℃, and in order to enable the glass product to obtain higher quality in the production process of the glass product, preferably, the preset arch top temperature is 1590 DEG℃The preset crown top temperature is set to be the required temperature fixed value, so that the production temperature in the glass kiln can be accurately controlled in the production process of the glass product, the melting quality of glass liquid in the glass kiln is ensured, and the quality of the glass product is ensured.

In one embodiment, as shown in fig. 1 and 3, a pipe insulation cover 1 is built on the periphery of a conveying pipe 10 by using a rock wool sandwich plate to cover the conveying pipe 10, in order to make the pipe insulation cover 1 have a good insulation effect, the thickness of the rock wool sandwich plate is 5cm, a support 11 in an insulation cavity supports the conveying pipe 10, in order to provide enough installation space for the conveying pipe 10, the peripheral side wall of the pipe insulation cover 1 is at least 80cm away from the conveying pipe, the height of the top of the pipe insulation cover 1 from the ground is controlled to be 2.5m, a through hole is formed in the side wall of the pipe insulation cover 1 to make the conveying pipe 10 communicate with a glass kiln, a plurality of air supply ports are formed in the top of the pipe insulation cover 1, an air supply device 2 supplies conditioning air into the insulation cavity through the plurality of air supply ports, an air conditioner can be selected as the air supply device 2, a temperature control unit outputs a temperature adjusting signal to the air supply device 2 according to a temperature value in the cavity, the gas supply device 2 adjusts the temperature of the gas fed into the heat-insulating cavity according to the temperature adjusting signal, so that the temperature value in the heat-insulating cavity is always controlled in a first temperature interval suitable for gas delivery.

In order to obtain a temperature value in the thermal insulation cavity, specifically, the cavity temperature obtaining unit includes: the temperature sensors 3 are distributed in the heat-insulating cavity and used for detecting local temperatures of a plurality of positions in the heat-insulating cavity to obtain a plurality of local temperature values; the temperature control unit is connected with the plurality of temperature sensors 3 and is used for calculating the average value of a plurality of local temperature values as the temperature value in the cavity. Set up temperature sensor 3 in order to obtain a plurality of local temperature values in a plurality of positions department in the heat preservation intracavity, specifically, install a temperature sensor 3 in every gas supply mouth department, calculate the average value of a plurality of local temperature values through the temperature control unit, regard the average value of a plurality of local temperature values as the intracavity temperature value, can ensure that the intracavity temperature value of acquireing is more accurate like this.

In one embodiment, in order to better control the temperature value in the heat preservation cavity, specifically, the control system further includes: the pressure sensor 4 is arranged in the heat insulation cavity and used for detecting the gas pressure in the cavity in the heat insulation cavity in real time; the temperature control unit is also connected with a pressure sensor 4 and used for determining the temperature value in the cavity according to the gas pressure in the cavity, outputting a temperature adjusting signal to the gas supply device 2 according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation. According to the state equation of ideal gas, under the condition that the volume is not changed, the gas pressure is in direct proportion to the temperature, namely the higher the gas temperature is, the larger the pressure is, the lower the gas temperature is, and the lower the pressure is, therefore, the pressure sensor 4 is installed in the heat-insulating cavity, the pressure value in the heat-insulating cavity is detected in real time through the pressure sensor 4, the change condition of the temperature value in the heat-insulating cavity is obtained, and multiple reference data are provided for controlling the temperature value in the heat-insulating cavity.

In another embodiment, in order to remind the worker of the change of the temperature in the heat preservation cavity in time, a warning device is installed on the outer side wall of the pipeline heat preservation cover 1 and connected with the temperature control unit, the temperature control unit can judge whether the temperature is in the first temperature interval according to the temperature value in the cavity and sends a corresponding warning signal to the warning device according to the judgment result, the temperature control unit sends the warning signal to the warning device under the condition that the temperature value in the cavity is not in the first temperature interval, and the warning device sends an alarm prompt according to the received warning signal so as to remind the worker of paying attention to the temperature change condition in the heat preservation cavity in time.

In order to control a temperature value in a glass furnace at a preset crown temperature so as to ensure melting quality of molten glass, specifically, the crown temperature acquiring unit includes: the thermocouple devices 5 are distributed at the top of the glass kiln, and the detection end of each thermocouple device 5 extends into the glass kiln and is used for detecting the local temperatures of a plurality of positions of the arch top of the glass kiln so as to obtain a plurality of arch top local temperature values; the temperature control unit is connected with the thermocouples 5 and is used for calculating the average value of the plurality of arch top local temperature values as the arch top temperature value. The control system comprises a plurality of thermocouples 5, a temperature control unit and a control unit, wherein the plurality of thermocouples 5 are used for detecting to obtain a plurality of arch top local temperature values, the temperature control unit calculates an average value of the plurality of arch top local temperature values to be used as an arch top temperature value so as to obtain a more accurate arch top temperature value, and when the local temperature value of the arch top of the glass kiln is detected, in order to ensure the accuracy of the detection of the thermocouples 5, the control system further comprises: the thermal insulation cover 6 is arranged at the top of the glass kiln and covers the exposed end of the plurality of thermocouples 5 exposed outside the glass kiln, as shown in fig. 2, the thermocouple 5 is exposed outside the glass kiln through the thermal insulation cover 6, the problem that the detection result is inaccurate due to the fact that the thermocouple 5 is influenced by the external environment temperature when the temperature in the glass kiln is detected is avoided, the thermocouple 5 is separated from the external environment through the thermal insulation cover 6, the detection precision of the thermocouple 5 is guaranteed, and the detection result of the thermocouple 5 is prevented from being influenced by external environment factors.

In one embodiment, according to the distribution condition of thermocouples 5 at the top of the glass kiln, a heat insulation plate with the thickness of 10mm is adopted to manufacture a heat insulation cover 6, a through hole is formed in the heat insulation cover 6, a measurement line of the thermocouple 5 penetrates out of the through hole to be connected with a temperature control unit, a thermocouple compensation lead is used as the measurement line of the thermocouple 5, in order to reduce the influence of the external environment temperature on the thermocouple 5, an aluminum wire pipe is wrapped on the measurement line of the thermocouple 5 to reduce the influence of external factors on the measurement value of the thermocouple 5, and the accuracy of the thermocouple 5 in detecting the arch top temperature value of the glass kiln is improved.

The invention also provides a control method for the temperature stability of the glass kiln, which is implemented by adopting the control system in any one of the above steps, wherein the glass kiln is conveyed by a conveying pipeline 10 and comprises the following steps: acquiring a cavity temperature value in a heat preservation cavity and an arch top temperature value of the arch top of the glass kiln in real time; controlling the temperature of the gas delivered into the heat preservation cavity by the gas delivery device 2 according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval; and adjusting the gas quantity sent into the glass kiln by the conveying pipeline 10 according to the arch top temperature value so as to control the arch top temperature value at a preset arch top temperature.

Specifically, acquire the intracavity temperature value in the heat preservation intracavity, include: local temperatures at a plurality of positions in the heat-insulating cavity are detected by a plurality of temperature sensors 3 distributed in the heat-insulating cavity, so that a plurality of local temperature values are obtained; and calculating the average value of the local temperature values as the temperature value in the cavity.

Specifically, the method for acquiring the arch top temperature value of the arch top of the glass kiln comprises the following steps: detecting local temperatures of a plurality of positions of the arch top of the glass kiln by a plurality of thermocouples 5 distributed at the top of the glass kiln to obtain a plurality of arch top local temperature values; and calculating the average value of the plurality of arch top local temperature values as the arch top temperature value.

Specifically, the control method further includes: acquiring the gas pressure in the cavity in the heat preservation cavity in real time; and determining the temperature value in the cavity according to the gas pressure in the cavity, and controlling the temperature of the gas delivered to the cavity by the gas delivery device 2 according to the temperature value in the cavity so as to control the temperature value in the cavity within a first temperature interval, wherein the gas pressure in the cavity and the temperature value in the cavity have a preset corresponding relation.

Specifically, the adjusting the gas quantity sent into the glass kiln by the conveying pipeline 10 according to the arch top temperature value so as to control the arch top temperature value at the preset arch top temperature comprises the following steps: if the difference value between the crown temperature value and the preset crown temperature is within a preset temperature range, the DCS combustion control unit adjusts the gas quantity sent into the glass kiln by the conveying pipeline 10 according to the difference value;

and if the difference value between the arch top temperature value and the preset arch top temperature is not within the preset temperature range, converting the arch top temperature control mode into a manual control mode.

In one embodiment, when the crown top temperature value of the glass kiln is not equal to the preset crown top temperature, the difference between the crown top temperature value and the preset crown top temperature is calculated by the DCS combustion control unit, if the difference is within the preset temperature range, as shown in table 1 below, the preset temperature range is-2 ℃ to +2 ℃, table 1 below is a comparison table of a difference set and a gas adjustment set between the crown top temperature value and the preset crown top temperature, the comparison table of the difference set and the gas adjustment set is stored in the DCS combustion control unit, after the difference between the crown top temperature value and the preset crown top temperature is obtained, a gas adjustment corresponding to the specific difference is determined in the difference set, and the DCS combustion control unit adjusts the gas amount sent into the glass kiln by the conveying pipeline 10 according to the gas adjustment.

Set of differences (. degree. C.)	Gas regulation set (Nm)3)
		-2	+1
-2	+1
		-1	+0.8
-0.5	+0.5
		-0.3	+0.3
0	0
		+0.3	-0.3
+0.5	-0.5
		+1	-0.8
+2	-1
		+2	-1

TABLE 1

The invention provides a control system and a control method for temperature stability of a glass kiln.A conveying pipeline for conveying gas is sealed by a pipeline heat-insulating cover 1 to form a heat-insulating cavity, so that the temperature in the heat-insulating cavity where the conveying pipeline is located is convenient to control, the temperature in the heat-insulating cavity is adjusted to provide proper conveying temperature for the conveying pipeline, the gas conveyed in the conveying pipeline is prevented from expanding and contracting due to the influence of external environment temperature in the heat-insulating cavity in the gas conveying process, the fluctuation of the gas quantity conveyed into the glass kiln is caused, the stability of the temperature in the glass kiln is influenced, in order to stabilize the temperature in the glass kiln and stabilize the temperature in the glass kiln at a preset crown temperature, on one hand, after the temperature value in the heat-insulating cavity is obtained, the temperature value of the gas conveyed into the heat-insulating cavity by a gas supply device is adjusted according to the temperature value in the cavity, and the temperature value in the heat-insulating cavity is controlled in a first temperature interval, thereby provide suitable delivery temperature for the transfer line, avoid the gas in the transfer line to cause because of the external environment temperature change to carry into the glass kiln internal combustion gas volume and take place to fluctuate, ensure the stability of the interior temperature of glass kiln, on the other hand satisfies the melting requirement of glass liquid in the glass kiln on the stable basis in order to ensure the temperature in the glass kiln, adjust the transfer line according to the gas volume of sending into in the glass kiln of the arch top temperature value that obtains, thereby make the temperature in the glass kiln maintain predetermine the arch top temperature, avoid the gas volume not enough to lead to the problem that the glass liquid melting quality is low.

According to the control system and the control method for the temperature stability of the glass kiln, disclosed by the invention, the fluctuation of the gas quantity sent into the glass kiln by the conveying pipeline is avoided by stabilizing the temperature value in the heat preservation cavity, so that the temperature value in the glass kiln is stabilized, and meanwhile, the temperature in the glass kiln is controlled at the preset crown temperature meeting the melting requirement of the glass liquid in the glass kiln, so that the melting quality of the glass liquid in the glass kiln is improved, and the quality of a final glass product is ensured.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as disclosed in the embodiments of the present invention as long as it does not depart from the spirit of the embodiments of the present invention.