Heating system and control method thereof

Abstract

The invention discloses a heating system and a control method thereof, and relates to the technical field of fiber processing, the heating system comprises a smelting furnace body, the smelting furnace body is internally provided with a smelting furnace space, and the smelting furnace space is used for smelting an internal batch into a compound liquid; the combustor is used for heating the smelting furnace body; a burner flow control device; the feeding device is used for feeding batch into the melting furnace space; the fuel gas heat value detection device is used for detecting the heat value of fuel gas introduced into the combustor; and the controller is configured to determine the target gas flow of the combustor based on the preset space temperature of the melting furnace space, and determine the target oxygen flow introduced into the combustor based on the target gas flow of the combustor and the heat value of the gas, so that the combustion state of the combustor can be adjusted, and the energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber processing, in particular to a heating system and a control method thereof. BACKGROUND

[0002] The glass fiber melting furnace refers to a thermal equipment for melting glass mixture in the manufacture of glass fiber. In the production of glass fiber melting, the stable, efficient and energy-saving melting of glass liquid is gradually valued. At present, although the temperature change of the glass fiber melting furnace can be monitored in real time, the adjustment of the temperature and the temperature change still needs to be realized by manually controlling the flow of the burner and the power of the electric melting, which has high artificial intervention and dependence and slow adjustment speed. In addition, the production of the melting furnace is affected by many factors such as the amount of raw materials, the calorific value of fuel, the flow field in the furnace, and the control of the melting furnace is easy to cause the fluctuation of the melting temperature, which seriously affects the quality of the glass liquid. Therefore, through more reasonable and fine control of the adjustment of the melting furnace combustion and electric melting, the production efficiency and product quality are improved while the energy consumption is reduced, which is the key to the control of the glass fiber melting furnace. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a heating system and a control method thereof, which can reduce energy consumption and improve gas utilization rate.

[0004] According to the present application, a heating system is provided, comprising: a melting furnace body, an internal space of the melting furnace body is provided with a melting furnace space, the melting furnace space is used for melting the mixture in the internal space into a mixture liquid; a burner used for heating the melting furnace body; a burner flow control device used for controlling the flow of fuel gas and oxygen into the burner; a feeding device used for feeding mixture into the melting furnace space; a fuel gas calorific value detection device used for detecting the calorific value of the fuel gas into the burner; a controller configured to determine a preset space temperature of the melting furnace space based on the feeding amount of the feeding device, determine a target fuel gas flow of the burner based on the preset space temperature of the melting furnace space, and determine a target oxygen flow into the burner based on the target fuel gas flow of the burner and the calorific value of the fuel gas.

[0005] In some embodiments of the present application, the burner flow control device comprises: a first temperature detection module used for detecting the actual space temperature of the melting furnace space; a burner flow enabling module electrically connected with the first temperature detection module; a burner flow control output module electrically connected with the burner flow enable module; a fuel gas regulating valve electrically connected with the burner flow control output module, the fuel gas regulating valve being configured to control a flow of fuel gas into the burner; an oxygen gas regulating valve electrically connected with the burner flow control output module, the oxygen gas regulating valve being configured to control a flow of oxygen gas into the burner; when a difference between the actual space temperature and the preset space temperature is greater than a preset temperature threshold, the burner flow enable module transmits a first signal to the burner flow control output module, the first signal being configured to instruct the burner flow control output module to perform adjustment of the flow of fuel gas and the flow of oxygen gas.

[0006] In some embodiments of the present application, the heating system comprises: an electrically assisted melting power control device configured to adjust a temperature of the matched liquid, the electrically assisted melting power control device comprising: a second temperature detection module configured to detect an actual pool bottom temperature of a bottom of the space of the melting furnace, the second temperature detection module being electrically connected with the controller; a heating module located in the matched liquid, the heating module being configured to heat the matched liquid; the controller is further configured to control a power of the heating module based on the actual pool bottom temperature and a preset pool bottom temperature so that the actual pool bottom temperature tends to the preset pool bottom temperature.

[0007] In some embodiments of the present application, the controller is further configured to determine the preset pool bottom temperature based on the feeding amount and the preset space temperature, and determine a target power of the electrically assisted melting power control device based on the preset pool bottom temperature.

[0008] In some embodiments of the present application, the electrically assisted melting power control device further comprises: a power adjusting device electrically connected with the controller and the heating module, the controller being configured to control the power adjusting device to adjust the power of the heating module; a switching device configured to control power-on and power-off of the heating module.

[0009] In some embodiments of the present application, the melting furnace body comprises a melting furnace dome, a melting furnace pool bottom and a melting furnace breast wall, the melting furnace dome, the melting furnace pool bottom and the melting furnace breast wall being combined to form the space of the melting furnace.

[0010] In some embodiments of the present application, the heating system further comprises: a liquid level detection module electrically connected to the controller, the liquid level detection module being configured to measure a liquid level of the bath in the melting furnace space and transmit liquid level data to the controller; and / or a photographing module electrically connected to the controller, the photographing module being configured to photograph the liquid level of the bath in the melting furnace space and transmit photographing data to the controller. The controller is configured to control the feeding amount of the feeding device according to the liquid level data and / or the photographing data.

[0011] In some embodiments of the present application, the heating system further comprises: a fault detection module configured to detect a fault signal; The controller is configured to control the gas flow and the oxygen flow to be reduced and / or maintain the power of the electric smelting power control device within a preset range when the fault detection module detects the fault signal.

[0012] According to the present application, a control method of a heating system is also provided, the control method being performed by the heating system as described above, and the control method comprising: determining a preset space temperature of the melting furnace space based on the feeding amount of the feeding device; determining a target gas flow of the burner based on the preset space temperature of the melting furnace space; determining a target oxygen flow input into the burner based on the target gas flow of the burner and the calorific value of the gas.

[0013] In some embodiments of the present application, a preset bath bottom temperature is determined based on the feeding amount and the preset space temperature, and a target power of the electric smelting power control device is determined based on the preset bath bottom temperature.

[0014] In some embodiments of the present application, the power of the electric smelting power control device is controlled according to the actual bath bottom temperature and the preset bath bottom temperature so that the actual bath bottom temperature tends to the preset bath bottom temperature.

[0015] The technical solutions provided by the present application can have the following beneficial effects: The application determines the preset space temperature of the melting furnace space through the feeding amount of the feeding device, and on this basis, the target gas flow required to reach the preset space temperature can be known based on the preset space temperature, and the target oxygen flow into the burner is determined according to the target gas flow and the calorific value of the gas, so as to adjust the oxygen amount supplied according to the calorific value of the gas required for the full combustion of the gas, thereby improving the combustion effect of the gas, reducing the emission of incomplete combustion products, realizing low energy consumption and improving the utilization rate of the gas. By automatically detecting and controlling the gas flow and oxygen flow into the burner, compared with the existing manual control mode, the control response time is shortened, the control precision is improved, and the control process is more real-time and efficient, so as to ensure that the space temperature of the melting furnace space is maintained at the preset space temperature, ensure the dynamic balance of the temperature, and be beneficial to improving the production quality and production efficiency of the glass fiber and avoiding production defects caused by space temperature fluctuation.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the application, and together with the specification serve to explain the principles of the application.

[0018] Figure 1 is a control method flow chart of a heating system according to an exemplary embodiment; Figure 2 is a before-and-after comparison chart of energy consumption according to an exemplary embodiment; Figure 3 is a control system composition chart of a heating system according to an exemplary embodiment. DETAILED DESCRIPTION

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the application more clear, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application. It should be noted that, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other at will.

[0020] The application provides a heating system, comprising a furnace body, a burner, a combustion flow control device, a feeding device, a gas calorific value detection device and a controller. The furnace body is internally provided with a smelting space for smelting the internal mixture into a mixture liquid. The burner is used for heating the furnace body. The combustion flow control device is used for controlling the gas flow and oxygen flow into the burner. The feeding device is used for feeding the mixture into the smelting space. The gas calorific value detection device is used for detecting the calorific value of the gas into the burner. The controller is configured to determine the preset space temperature of the smelting space based on the feeding amount of the feeding device, determine the target gas flow of the burner based on the preset space temperature of the smelting space, and determine the target oxygen flow into the burner based on the target gas flow of the burner and the calorific value of the gas, so as to adjust the combustion state of the gas to make the gas fully burn, thereby saving energy consumption and improving the gas utilization rate.

[0021] Some specific embodiments described below are intended to facilitate the understanding of the present application by those skilled in the art, and the present application is not limited to some specific embodiments described below.

[0022] As Figure 1As shown, an exemplary embodiment of the present application provides a heating system, which includes a furnace body, a burner for heating the furnace body, a combustion flow control device, a feeding device, a gas calorific value detection device and a controller. The furnace body has a melting space inside, which is used for melting the mixture inside into a mixture liquid. The burner is a device for burning gas, and the heat generated by the burning is used to heat the mixture in the melting space. The combustion flow control device is used to control the flow of gas and oxygen into the burner. The feeding device is used to feed the mixture into the melting space, and the gas calorific value detection device is used to detect the calorific value of the gas entering the burner. The controller is configured to determine the preset space temperature of the melting space based on the feeding amount of the feeding device, determine the target gas flow of the burner based on the preset space temperature of the melting space, determine the target oxygen flow into the burner based on the target gas flow of the burner and the calorific value of the gas, so as to adjust the oxygen flow into the burner according to the calorific value of the gas to reach the target oxygen flow, so that the gas can be fully burned. Exemplarily, the gas calorific value detection device can use a calorific value monitor, and the controller is a DCS (Distributed Control System) control system. The gas can include natural gas, liquefied petroleum gas, gasoline, diesel, heavy oil, etc. The gas in the present application mainly refers to natural gas, and the calorific value is a characteristic of the fuel itself, which represents the heat release capacity when the fuel is completely burned, and depends on the chemical composition of the fuel itself. When the calorific value of the gas is 8200 kcal / Nm³, 600 m³ of natural gas is supplied with 1500 m³ of oxygen, and the ratio of oxygen to gas is 2.50; when the calorific value of the gas is 8300 kcal / Nm³, 600 m³ of natural gas needs to be supplied with 1550 m³ of oxygen, and the ratio of oxygen to gas is 2.58.

[0023] In the embodiment, the heating system is applied to a glass fiber melting furnace, wherein the matching liquid can be glass liquid. The melting furnace body is used for melting the matching material to provide qualified glass liquid for glass fiber forming. The preset space temperature of the melting furnace space is determined by the feeding amount of the feeding device in the embodiment. The target gas flow required to reach the preset space temperature can be obtained according to the preset space temperature. According to the chemical formula CH4+2O2→CO2+2H2O, 1m³ of gas needs 2m³ of oxygen, that is, the oxygen-gas ratio is 2. However, the inventors find that the actual oxygen-gas ratio is greater than 2 due to the different calorific values of the gas. The target oxygen flow rate of the burner is determined according to the target gas flow rate and the calorific value of the gas in the embodiment, so that the oxygen amount required for sufficient combustion of the gas can be adjusted according to the calorific value of the gas, thereby improving the combustion effect of the gas, reducing the emission of incomplete combustion products, achieving low energy consumption and improving the utilization rate of the gas. By automatically controlling the gas flow rate and the oxygen flow rate of the burner, compared with the current manual control method, the control response time is shortened, the control accuracy is improved, and the control process is more real-time and efficient, so as to ensure that the space temperature of the melting furnace space is maintained at the preset space temperature and the dynamic balance of the temperature is ensured, which is beneficial to improve the production quality and production efficiency of the glass fiber and avoid production defects caused by space temperature fluctuations.

[0024] In some embodiments, as shown in Figure 1 The burner flow control device includes a first temperature detection module, a burner flow enabling module, a burner flow control output module, and an adjusting valve. The first temperature detection module is installed in the melting furnace space and is used to detect the actual space temperature of the melting furnace space. The burner flow enabling module is electrically connected to the first temperature detection module. The first temperature detection module can transmit the temperature signal to the burner flow enabling module through a first temperature transmitter and a first temperature signal input module. The burner flow control output module is electrically connected to the burner flow enabling module. The gas adjusting valve is electrically connected to the burner flow control output module and is used to control the gas flow rate of the burner. The oxygen adjusting valve is electrically connected to the burner flow control output module and is used to control the oxygen flow rate of the burner. When the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, the burner flow enabling module transmits a first signal to the burner flow control output module, and the first signal is used to instruct the burner flow control output module to adjust the gas flow rate and the oxygen flow rate.

[0025] In this embodiment, the first temperature detection module transmits an electrical signal to the burner flow enable module, and the burner flow enable module can receive the electrical signal from the first temperature detection module and determine whether the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold. When the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, it indicates that the difference between the actual space temperature and the preset space temperature is large, and the temperature needs to be adjusted. At this time, the burner flow enable module transmits a first signal to the burner flow control output module, and the first signal is used to instruct the burner flow control output module to adjust the flow rates of the fuel gas and the oxygen to ensure that the actual space temperature of the melting furnace space is stable within a certain range of the preset space temperature, so as to ensure the quality and production efficiency of the glass fiber. The burner flow enable module may, for example, be a microcontroller unit (MCU), and the GPIO (General Purpose Input / Output) port of the microcontroller unit (MCU) is connected with the enable end signal of the burner flow control output module. The microcontroller unit can determine whether the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, and when the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, the microcontroller unit outputs a first signal to the burner flow control output module through the GPIO port to enable the burner flow control output module. Of course, it can be understood that the burner flow enable module can also use a comparator or other devices to determine whether the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold and output a corresponding enable signal. Exemplarily, the enabled burner flow control output module calculates the opening degree that the oxygen regulating valve and the fuel gas regulating valve need to adjust, and respectively sends control signals to the oxygen regulating valve and the fuel gas regulating valve to adjust the flow rates of the oxygen and the fuel gas, thereby changing the heat output of the burner, and finally achieving precise control of the space temperature of the melting furnace.

[0026] Exemplarily, as shown in Figure 3 The gas regulating valve includes a first fuel gas regulating valve, and the oxygen regulating valve includes a first oxygen regulating valve. The first fuel gas regulating valve is used to control the flow rate of the fuel gas entering the first burner, and the first oxygen regulating valve is used to control the flow rate of the oxygen entering the first burner. A plurality of first temperature detection modules are arranged in the melting furnace space, and the plurality of first temperature detection modules are respectively a melting furnace space thermocouple TA, a melting furnace space thermocouple TB, a melting furnace space thermocouple TC, and a melting furnace space thermocouple TD, so as to detect the temperature at each position in the melting furnace space. A plurality of burner flow enable modules are arranged in the melting furnace space, and the plurality of burner flow enable modules are respectively a burner flow enable module A, a burner flow enable module B, a burner flow enable module C, and a burner flow enable module D.

[0027] The burner flow enable module A is electrically connected to the furnace space thermocouple TA. When the furnace space thermocouple TA detects that the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, the burner flow enable module A transmits a signal to the burner flow control output module. This signal instructs the burner flow control output module to output control signals to the first gas regulating valve and the first oxygen regulating valve, respectively, to control the flow rates of oxygen and gas entering the first burner, thereby achieving precise control of the furnace space temperature. The first burner includes burners A1, A2, and Ai, which are arranged in parallel to improve the combustion efficiency of the gas and the temperature rise efficiency of the furnace space.

[0028] The gas regulating valve also includes a second gas regulating valve, and the oxygen regulating valve also includes a second oxygen regulating valve. The second gas regulating valve controls the gas flow rate entering the second burner, and the second oxygen regulating valve controls the oxygen flow rate entering the second burner. The burner flow enabling module B is electrically connected to the furnace space thermocouple TB. When the furnace space thermocouple TB detects a difference between the actual space temperature and the preset space temperature greater than a preset temperature threshold, the burner flow enabling module B transmits a signal to the burner flow control output module, instructing the burner flow control output module to output control signals to the second gas regulating valve and the second oxygen regulating valve, respectively, to control the flow rates of oxygen and gas entering the second burner, thereby achieving precise control of the furnace space temperature. The second burner includes burners B1, B2, and Bi, which are arranged side-by-side to improve gas combustion efficiency and increase the temperature rise efficiency of the furnace space.

[0029] The gas regulating valve also includes a third gas regulating valve, and the oxygen regulating valve also includes a third oxygen regulating valve. The third gas regulating valve controls the gas flow rate into the third burner, and the third oxygen regulating valve controls the oxygen flow rate into the third burner. The burner flow enabling module C is electrically connected to the furnace space thermocouple TC. When the furnace space thermocouple TC detects a difference between the actual space temperature and the preset space temperature greater than a preset temperature threshold, the burner flow enabling module C transmits a signal to the burner flow control output module, instructing the burner flow control output module to output control signals to the third oxygen regulating valve and the third gas regulating valve to control the flow rates of oxygen and gas entering the third burner, thereby achieving precise control of the furnace space temperature. The third burner includes burners C1, C2, and Ci, which are arranged side-by-side to improve gas combustion efficiency and increase the temperature rise efficiency of the furnace space.

[0030] The gas regulating valve also includes a fourth gas regulating valve, and the oxygen regulating valve also includes a fourth oxygen regulating valve. The fourth gas regulating valve controls the gas flow rate entering the fourth burner, and the fourth oxygen regulating valve controls the oxygen flow rate entering the fourth burner. The burner flow enabling module D is electrically connected to the furnace space thermocouple TD. When the furnace space thermocouple TD detects that the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, the burner flow enabling module D transmits a signal to the burner flow control output module to instruct the burner flow control output module to output control signals to the fourth oxygen regulating valve and the fourth gas regulating valve to control the flow rates of oxygen and gas entering the fourth burner, thereby achieving precise control of the furnace space temperature. The fourth burner includes burners D1, D2, and Di, which are arranged in parallel to improve the combustion efficiency of the gas and the temperature rise efficiency of the furnace space.

[0031] In some embodiments, the burner flow control device further includes a flow meter for accurately measuring the flow rates of oxygen and fuel gas entering the burner, providing accurate data for flow control.

[0032] In some embodiments, the first signal is used to instruct the burner flow control output module to perform oxygen and gas flow regulation, including: the burner flow control output module receives the first signal and calculates the opening degree that the oxygen regulating valve and the gas regulating valve need to be adjusted according to the current flow data measured by the flow meter, and sends control signals to the oxygen regulating valve and the gas regulating valve respectively, thereby regulating the flow of oxygen and gas, thereby changing the calorific value of the burner, and finally achieving precise control of the furnace space temperature.

[0033] In some embodiments, the heating system includes an electro-melting power control device for regulating the temperature of the complexing liquid, i.e., assisting in heating and regulating the temperature of the complexing liquid to ensure homogenization and clarification of the complexing liquid. The electro-melting power control device includes a second temperature detection module and a heating module.

[0034] The second temperature detection module is installed at the bottom of the furnace body. This module detects the actual bottom temperature of the furnace space. It is electrically connected to the controller and transmits the temperature signal to the controller via a second temperature transmitter and a second temperature signal input module. The heating module can be configured as a heating electrode, located within the mixing liquid (i.e., immersed in it), and is used to heat the mixing liquid. The controller is also configured to control the power of the heating module based on the actual bottom temperature and a preset bottom temperature, so that the actual bottom temperature tends towards the preset bottom temperature.

[0035] In this embodiment, after the second temperature detection module detects the actual bottom temperature of the pool, it transmits the temperature signal to the controller. The controller compares and analyzes the received temperature signal with the preset bottom temperature. When the actual bottom temperature is lower than the preset bottom temperature, the controller increases the power of the heating module to raise the bottom temperature. When the actual bottom temperature is higher than the preset bottom temperature, the controller decreases the power of the heating module to lower the bottom temperature. This achieves automated regulation of the bottom temperature, ensuring that the temperature of the compounding solution is within a suitable range, thereby guaranteeing the quality and production efficiency of the glass fiber.

[0036] For example, such as Figure 3 As shown, the bottom of the furnace body is equipped with multiple second temperature detection modules, which are bottom temperature thermocouples t1, t2, t3, t4, and tj. The bottom of the furnace body is also equipped with multiple heating modules, which are a first group of electric melting aids P1, a second group of electric melting aids P2, a third group of electric melting aids P3, a fourth group of electric melting aids P4, and a fifth group of electric melting aids Pj. Specifically, the first group of electric melting P1 is positioned to correspond to the position of the bottom temperature thermocouple t1; the second group of electric melting P2 is positioned to correspond to the position of the bottom temperature thermocouple t2; the third group of electric melting P3 is positioned to correspond to the position of the bottom temperature thermocouple t3; the fourth group of electric melting P4 is positioned to correspond to the position of the bottom temperature thermocouple t4; and the fifth group of electric melting Pj is positioned to correspond to the position of the bottom temperature thermocouple tj.

[0037] Once thermocouple t1 detects the actual bottom temperature of the pool, it transmits the temperature signal to the second temperature transmitter. The second temperature transmitter converts the temperature signal into an electrical signal and transmits it to the second temperature signal input module. The second temperature signal input module then transmits the temperature signal to the controller. The controller compares the received temperature signal with the preset bottom temperature to adjust the power of the first set of electric fluxing agents P1, ensuring that the temperature of the mixing liquid is within a suitable range, thereby guaranteeing the quality and production efficiency of the glass fiber. It can be understood that the temperature detection principle and control method of thermocouples t2, t3, t4, and tj are the same as those of thermocouple t1.

[0038] In some embodiments, the electro-fusing power control device further includes a power regulating device and a switching device. The power regulating device may be configured as a power regulating cabinet, and is electrically connected to the controller and the heating module. The controller controls the power regulating device to regulate the power of the heating module. The switching device is used to control the energization and de-energization of the heating module, automatically switching the circuit on and off according to the control signal.

[0039] In some embodiments, the controller is further configured to determine a preset bottom temperature based on the feed rate and a preset space temperature, and to determine a target power for the electric melting power control device based on the preset bottom temperature. The preset space temperature of the melting furnace space and the feed rate are related by the following functional relationship g1:

[0040] in, The temperature of the melting furnace space, For the amount of material to be fed, The total thermal power input to the burner, For ambient temperature, The overall heat consumption coefficient of the materials added to the batch is... This is part of the heat loss in the furnace space. The overall heat transfer coefficient of the melting furnace body. This refers to the heat dissipation area of ​​the furnace body.

[0041] The following functional relationship exists between the feed amount, the preset space temperature, and the preset pool bottom temperature: g2

[0042] in, Preset pool bottom temperature; This refers to the amount of material fed into the machine. Preset space temperature; The strength coefficient is the amount of material fed. This refers to the inherent reference temperature difference between the top and bottom of the complexed liquid under zero feeding conditions.

[0043] In this embodiment, the target power of the electric melting power control device is determined based on the preset space temperature, preset pool bottom temperature, and feeding amount. The method for calculating the target power of the electric melting power control device is simpler, and the target power of the electric melting power control device obtained based on the preset space temperature, preset pool bottom temperature, and feeding amount is more accurate, so as to ensure the quality and production efficiency of glass fiber.

[0044] In some embodiments, the furnace body includes a furnace arch, a furnace pool bottom, and a furnace breast wall, which enclose a melting furnace space. The furnace arch is located at the top of the furnace body, the furnace pool bottom is located at the bottom of the furnace body, and the furnace breast wall is located in the middle of the furnace body. The furnace body also includes a furnace flue and a furnace processing duct. The furnace flue is used to discharge flue gas generated during combustion and other processes. The heating system also includes a flue gas oxygen content detection device for detecting the oxygen content in the flue gas discharged from the furnace body. The flue gas oxygen content detection device is installed in the furnace flue, and the furnace discharge duct is used to output the molten mixture.

[0045] In some embodiments, the heating system further includes a liquid level detection module electrically connected to the controller. The liquid level detection module measures the liquid level of the mixing liquid within the melting furnace space. The liquid level detection module can be a level gauge, using hydrostatic or capacitive liquid level measurement technology to directly measure the liquid level and transmit the liquid level signal to the controller. The controller is configured to control the feeding rate of the feeding device based on the liquid level data. This can be understood as the controller controlling the feeding speed of the feeding device based on the liquid level data, thereby controlling the feeding rate to ensure the liquid level is at an optimal level, thus guaranteeing the quality and production efficiency of the glass fiber.

[0046] In some embodiments, such as Figure 3 As shown, the heating system also includes a level transmitter and a level signal input module. The level detection module is electrically connected to the level transmitter, the level transmitter is electrically connected to the level signal input module, and the level signal input module is electrically connected to the controller. The level detection module measures the level of the mixing liquid in the melting furnace space and transmits the level data to the level transmitter. The level transmitter converts the level data into an electrical signal and transmits it to the level signal input module. The level signal input module transmits the electrical signal of the level data to the controller. The controller controls the feeding amount of the feeding device according to the level data.

[0047] In some embodiments, such as Figure 3 As shown, the heating system also includes a camera module electrically connected to the controller. The camera module is used to capture the liquid level of the mixing liquid within the melting furnace space and transmit the captured data to the controller. The camera module can be a camera installed within the melting furnace space for visual monitoring of the liquid level. The controller is configured to control the feeding amount of the feeding device based on the captured data, ensuring the liquid level is at an optimal height to guarantee the quality and production efficiency of the glass fiber. For example, the feeding device can be a feeding machine, and the feeding amount is controlled by controlling the rotation speed of the feeding machine. A liquid level signal input module is electrically connected to both the camera module and the controller. The camera module transmits the captured data to the liquid level signal input module, which in turn transmits the captured data information to the controller. The controller then controls the feeding amount of the feeding device based on the captured data.

[0048] The relationship between the feeder's rotation speed and the liquid level is determined based on the different models or sizes of feeders and the number of feeders installed. For example, four feeders can be installed. When the liquid level is 0.00mm, the average feeder rotation speed is 300RPM. When the liquid level is -0.15mm, the average feeder rotation speed is 315RPM. When the liquid level is 0.15mm, the average feeder rotation speed is 290RPM.

[0049] In some embodiments, the heating system further includes a liquid level detection device and an imaging module. The liquid level detection module is electrically connected to the controller and is used to measure the liquid level height of the mixing liquid within the melting furnace space and transmit the liquid level data to the controller. The imaging module is also electrically connected to the controller and is used to capture images of the liquid level height of the mixing liquid within the melting furnace space and transmit the captured image data to the controller. The controller is configured to control the feeding amount of the feeding device based on the liquid level data and the captured image data. By combining the liquid level data and the captured image data to accurately measure the feeding amount, the control accuracy of the feeding device is further improved, thereby improving the quality and production efficiency of the glass fiber.

[0050] In some embodiments, the heating system further includes a fault detection module for detecting fault signals. The fault signal may indicate that the first temperature detection module is damaged.

[0051] The controller is configured to reduce the gas and oxygen flow rates and / or maintain the power of the electric melting power control device within a preset range when the fault detection module detects a fault signal. For example, when the first temperature detection module fails, the fault detection module in the heating system will immediately detect this fault signal. The controller will automatically switch to emergency control mode. In emergency control mode, the system operates according to a pre-set emergency strategy. For instance, based on historical furnace space temperature data and other relevant parameters (such as burner flow rate, feed rate, etc.), the current furnace space temperature is estimated, and a conservative control strategy is adopted, such as reducing the burner flow rate and maintaining the power of the electric melting power control device at a certain level. This design helps prevent excessively high or low furnace temperatures from severely impacting the furnace equipment and glass fiber production.

[0052] In some embodiments, when the fault detection module detects a fault signal, the heating system enters a monitoring and maintenance mode. In this mode, on the one hand, the first temperature detection module is monitored to see if it can be repaired or restarted; on the other hand, other key parameters of the melting furnace (such as bottom temperature, liquid level, and flue gas oxygen content) are monitored more frequently to ensure the stable operation of the melting furnace under special circumstances, and to promptly issue fault alarms and relevant operation prompts to the operators.

[0053] like Figure 2 As shown, the heating system in this embodiment can significantly reduce energy consumption, saving costs and energy consumption while ensuring production efficiency and quality.

[0054] This application also provides a control method for a heating system, which is executed through the aforementioned heating system, such as... Figure 1 As shown, the control method includes: S100. Determine the preset space temperature of the melting furnace space based on the amount of material fed by the feeding device.

[0055] The preset temperature of the melting furnace space is determined by the amount of material fed by the feeding device. At this preset temperature, the production quality and efficiency of glass fiber can be guaranteed. The preset temperature of the melting furnace space and the amount of material fed are related by the following function g1:

[0056] in, The temperature of the melting furnace space, For the amount of material to be fed, The total thermal power input to the burner, For ambient temperature, The overall heat consumption coefficient of the materials added to the batch is... This is part of the heat loss in the furnace space. The overall heat transfer coefficient of the melting furnace body. This refers to the heat dissipation area of ​​the furnace body.

[0057] S200: Determine the target gas flow rate of the burner based on the preset space temperature of the melting furnace space.

[0058] The target gas flow rate of the burner is determined by the preset temperature of the furnace space. A specific functional relationship, f1, exists between the preset temperature and the burner flow rate. This relationship f1 is determined based on factors such as the heat exchange characteristics of the furnace and the fuel characteristics. The functional relationship f1 is as follows:

[0059] in, Target gas flow rate; : Calorific value of fuel gas (i.e., lower heating value of fuel gas); σ: Stefan-Boltzmann constant; ε: Effective emissivity of the furnace; A: Effective radiant area of ​​the furnace; Preset room temperature; : Surface temperature of the complexing liquid; : Convective heat transfer coefficient; The flow rate of oxygen; Specific heat capacity of flue gas; : Temperature of the flue gas; Ambient temperature; : Overall heat transfer coefficient of the melting furnace body; : Heat dissipation area of ​​the furnace body; : The net heat consumed during the glass melting process.

[0060] S300: Determine the target oxygen flow rate into the burner based on the target gas flow rate and the calorific value of the gas.

[0061] The target oxygen flow rate into the burner is determined based on the target gas flow rate and the calorific value of the gas, thus determining the amount of oxygen required for complete combustion of gases with different calorific values. The target gas flow rate and the calorific value of the gas have the following functional relationship:

[0062] in, Target oxygen flow rate; Target gas flow rate; Calorific value of gas (i.e., the lower heating value of gas). Theoretical oxygen demand per unit of calorific value; Theoretical CO2 production per unit of calorific value; Oxygen purity.

[0063] In this embodiment, the preset space temperature of the furnace is determined by the amount of material fed by the feeding device. Based on the preset space temperature, the target gas flow rate required to reach the preset space temperature can be determined. On this basis, the target oxygen flow rate into the burner is determined based on the target gas flow rate and the calorific value of the gas. This allows the amount of oxygen supplied for the complete combustion of the gas to be adjusted according to the calorific value of the gas, thereby improving the combustion effect of the gas, reducing the emission of incomplete combustion products, achieving low energy consumption and improving the gas utilization rate.

[0064] In some embodiments, the control method for the heating system further includes: The preset bottom temperature of the pool is determined based on the amount of material fed and the preset space temperature, and the target power of the electric fluxing power control device is determined based on the preset bottom temperature of the pool.

[0065] The preset temperature of the melting furnace space and the amount of material fed are related by the following function g1:

[0066] in, The temperature of the melting furnace space, For the amount of material to be fed, The total thermal power input to the burner, For ambient temperature, The overall heat consumption coefficient of the materials added to the batch is... This is part of the heat loss in the furnace space. The overall heat transfer coefficient of the melting furnace body. This refers to the heat dissipation area of ​​the furnace body.

[0067] The following functional relationship exists between the feed amount, the preset space temperature, and the preset pool bottom temperature: g2

[0068] in, Preset pool bottom temperature; This refers to the amount of material fed into the machine. Preset space temperature; The strength coefficient is the amount of material fed. This refers to the inherent reference temperature difference between the top and bottom of the complexed liquid under zero feeding conditions.

[0069] In this embodiment, the target power of the electric melting power control device is determined based on the preset space temperature, preset pool bottom temperature, and feeding amount. The method for calculating the target power of the electric melting power control device is simpler, and the target power of the electric melting power control device obtained based on the preset space temperature, preset pool bottom temperature, and feeding amount is more accurate, so as to ensure the quality and production efficiency of glass fiber.

[0070] In some embodiments, the control method for the heating system further includes: Based on the actual bottom temperature and the preset bottom temperature, the power of the electric melting power control device is controlled to make the actual bottom temperature approach the preset bottom temperature.

[0071] In this embodiment, after the second temperature detection module detects the actual bottom temperature of the bath, it transmits the temperature signal to the controller. The controller compares and analyzes the received temperature signal with the preset bottom temperature. When the actual bottom temperature is lower than the preset bottom temperature, the controller increases the power of the electro-melting power control device to raise the bottom temperature. When the actual bottom temperature is higher than the preset bottom temperature, the controller decreases the power of the electro-melting power control device to lower the bottom temperature. This achieves automatic regulation of the bottom temperature, ensuring that the temperature of the mixing solution is within a suitable range, thereby guaranteeing the quality and production efficiency of the glass fiber. Controlling the power of the electro-melting power control device is equivalent to controlling the power of the heating device.

[0072] In some embodiments, determining a preset temperature of the furnace space based on the amount of material fed by the feeding device, and determining a target gas flow rate of the burner based on the preset temperature of the furnace space, includes: The feed rate is substituted into the first control model to calculate the burner flow rate. The first control model includes the functional relationships g1 and f1 as described above.

[0073] This embodiment automatically calculates the target gas flow rate of the burner through the first control model, thereby shortening the control response time and improving control accuracy.

[0074] In some embodiments, the controller has a second control model, through which the combustion ratio λ is calculated.

[0075]

[0076] in, These are the characteristics of the gas. Theoretical oxygen demand, i.e., 1 Nm³ 3 The theoretical amount of oxygen required for complete combustion of fuel gas. The oxygen content in the flue gas. This refers to the purity of oxygen.

[0077] In some embodiments, determining the target oxygen flow rate into the burner based on the target gas flow rate of the burner and the calorific value of the gas includes: The target gas flow rate and the calorific value of the gas are substituted into the third control model to calculate the target oxygen flow rate introduced into the burner.

[0078] In this embodiment, the target oxygen flow rate into the burner is automatically calculated by the third control model. The amount of oxygen supplied is controlled according to the different calorific values ​​of the gas, thereby ensuring complete combustion of the gas, reducing the emission of incomplete combustion products, achieving low energy consumption and improving gas utilization. The burner flow rate is automatically calculated by the model, which shortens the control response time and improves the control accuracy.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. The application has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A heating system, characterized in that, The heating system includes: The furnace body has a melting furnace space inside, which is used to melt the batch materials inside into a batch liquid; A burner is used to heat the furnace body; A burner flow control device is used to control the flow rate of the fuel gas and oxygen supplied to the burner; A feeding device is used to feed batch materials into the melting furnace space; A gas calorific value detection device is used to detect the calorific value of the gas introduced into the burner; The controller is configured to determine a preset space temperature of the furnace space based on the amount of material fed by the feeding device, determine a target gas flow rate of the burner based on the preset space temperature of the furnace space, and determine a target oxygen flow rate introduced into the burner based on the target gas flow rate of the burner and the calorific value of the gas.

2. The heating system according to claim 1, characterized in that, The burner flow control device includes: The first temperature detection module is used to detect the actual space temperature of the furnace space. The burner flow enable module is electrically connected to the first temperature detection module; The burner flow control output module is electrically connected to the burner flow enable module; A gas regulating valve is electrically connected to the burner flow control output module, and the gas regulating valve is used to control the gas flow rate into the burner; An oxygen regulating valve is electrically connected to the burner flow control output module and is used to control the oxygen flow rate into the burner. When the difference between the actual space temperature and the preset space temperature is greater than the preset temperature threshold, the burner flow enable module transmits a first signal to the burner flow control output module. The first signal is used to instruct the burner flow control output module to perform the adjustment of the gas flow and the oxygen flow.

3. The heating system according to claim 1, characterized in that, The heating system includes: An electro-melting power control device is used to adjust the temperature of the compounding solution, the electro-melting power control device comprising: The second temperature detection module is used to detect the actual bottom temperature of the furnace space, and the second temperature detection module is electrically connected to the controller. A heating module is located inside the complexing liquid, and the heating module is used to heat the complexing liquid; The controller is further configured to control the power of the heating module based on the actual pool bottom temperature and the preset pool bottom temperature, so that the actual pool bottom temperature tends to the preset pool bottom temperature.

4. The heating system according to claim 3, characterized in that, The controller is also configured to determine the preset bottom temperature of the pool based on the feed amount and the preset space temperature, and to determine the target power of the electric fluxing power control device based on the preset bottom temperature.

5. The heating system according to claim 1, characterized in that, The electric fluxing power control device further includes: A power regulating device is electrically connected to the controller and the heating module, and the controller controls the power regulating device to regulate the power of the heating module; A switching device is used to control the power supply to and from the heating module.

6. The heating system according to claim 1, characterized in that, The furnace body includes a furnace arch, a furnace pool bottom, and a furnace breast wall, which together enclose the furnace space.

7. The heating system according to claim 1, characterized in that, The heating system also includes: A liquid level detection module, electrically connected to the controller, is used to measure the liquid level height of the mixing liquid within the furnace space and transmit the liquid level data to the controller; and / or, The imaging module is electrically connected to the controller. The imaging module is used to capture the liquid level height of the mixing liquid in the melting furnace space and transmit the captured data to the controller. The controller is configured to control the feeding amount of the feeding device based on the liquid level data and / or the captured data.

8. The heating system according to claim 1, characterized in that, The heating system also includes: The fault detection module is used to detect fault signals. The controller is configured to, when the fault detection module detects the fault signal, control the reduction of the gas flow rate and the oxygen flow rate, and / or maintain the power of the electric fluxing power control device within a preset range.

9. A control method for a heating system, characterized in that, The control method is executed by the heating system as described in any one of claims 1-8, and the control method includes: The preset temperature of the furnace space is determined based on the amount of material fed by the feeding device. The target gas flow rate of the burner is determined based on the preset space temperature of the furnace space; The target oxygen flow rate introduced into the burner is determined based on the target gas flow rate of the burner and the calorific value of the gas.

10. The control method according to claim 9, characterized in that, The preset bottom temperature of the pool is determined based on the amount of material fed and the preset space temperature, and the target power of the electric melting power control device is determined based on the preset bottom temperature.

11. The control method according to claim 9, characterized in that, Based on the actual bottom temperature of the pool and the preset bottom temperature, the power of the electric melting power control device is controlled so that the actual bottom temperature tends to the preset bottom temperature.

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