A defoaming process for glass melting and a defoaming agent pump supply system

Abstract

This invention relates to the field of defoaming agent supply technology, and particularly to a defoaming process and defoaming agent pump supply system for glass melting. The defoaming process for glass melting includes: Step b1, closing the calibration pipeline, leaving the normal supply pipeline open, opening the metering pump a, opening the solenoid valve a of the spraying assembly, and spraying the defoaming agent from the defoaming gun; Step b2, setting two sets of spraying assemblies on one main supply pipeline to control the spraying of defoaming agent at symmetrical positions on both sides of the same cross-section of the furnace, with the two sets of spraying assemblies spraying alternately; Step b3, multiple sets of main supply pipelines corresponding to different cross-sectional positions of the furnace or different furnaces; by setting two sets of spraying assemblies on the main supply pipeline, quantitative spraying of defoaming agent at the same cross-sectional position of the furnace is achieved. Combined with the setting of multiple sets of main supply pipelines, the spraying amount of defoaming agent at different cross-sectional positions of the furnace can be set as needed, improving defoaming quality while reducing the amount of defoaming agent used.

Description

Technical Field

[0001] This invention relates to the field of defoaming agent supply technology, and in particular to a defoaming process for glass melting and a defoaming agent pump supply system. Background Technology

[0002] In the production of photovoltaic glass, raw materials need to be melted into molten glass and then rolled to form glass. During the melting process, a large number of bubbles are generated, which reduces the efficiency of the furnace and seriously affects production efficiency. Therefore, defoaming agents or demisters are usually sprayed onto the molten glass to control the foam in the furnace and improve the production efficiency of the furnace.

[0003] Chinese patent CN202421599116.7 discloses a skid-mounted defoamer supply device for glass melting, used in the glass melting field to spray defoamer into white foam areas in a melting furnace. The device includes: a skid; an electrical cabinet module for electrically controlled liquid supply; a storage tank module for storing the agent; a pipeline system connected to the storage tank module; and a pump module for adding the agent to the storage tank module in conjunction with the pipeline system. The electrical cabinet module, storage tank module, pipeline system, and pump module are integrated and installed on the skid. This invention integrates the electrical cabinet, storage tank module, pump module, pipeline system, flow control, level monitoring, control valves, and regulating valves in a skid-mounted configuration, effectively saving installation space, accelerating installation progress, saving materials, and achieving standardization. It solves the technical problems of existing defoamer supply systems, such as complex structure, large footprint, high installation difficulty, and long construction period.

[0004] However, this technical solution requires storing the defoamer in a high-pressure tank and filling the top of the tank with compressed air to create a high-pressure environment. When the defoamer needs to be sprayed, the defoamer in the tank is delivered to the defoaming gun through a pipeline system under the pressure of the compressed air. As can be seen, the tank supply system using compressed air for pressurization involves a pressure vessel. During use and manufacturing, it needs to be supervised and managed in accordance with the relevant management regulations for special pressure vessels. In actual production, frequent inspections and replacements are required, causing production stoppages and other problems. At the same time, if the pressure inside the pressure vessel storing the defoamer changes, it will also affect the atomization effect of the defoaming gun, thereby affecting the defoaming quality in the kiln. Furthermore, the investment cost of this special equipment defoaming system is high. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a defoaming process for glass melting. This process involves pressurizing the defoaming agent using a metering pump and then spraying it through a defoaming gun. During spraying, compressed air atomizes the defoaming agent at the gun's outlet. This solves the problems of traditional methods that require high-pressure storage in a storage tank for defoaming, leading to inconvenience in system operation and maintenance and impacting production. Furthermore, two sets of spraying components are installed on the main liquid supply line to achieve quantitative spraying of the defoaming agent at the same cross-sectional location of the kiln. Combined with multiple main liquid supply lines, the spraying volume of the defoaming agent at different cross-sectional locations of the kiln can be set as needed, improving defoaming quality while reducing the amount of defoaming agent used.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A defoaming process for glass melting includes:

[0008] Step b: Defoamer is sprayed normally in the main fluid supply line:

[0009] Step b1: Close the calibration pipeline, keep the normal liquid supply pipeline open, turn on the metering pump a, the solenoid valve a of the spray assembly opens, the defoaming agent is sprayed out from the defoaming gun, the flow value of the electronic flow meter is compared with the flow value preset by the control system, and the metering pump a is controlled to adjust the flow in real time accordingly. The control system controls the spraying time to control the flow rate of a single spray.

[0010] Step b2: Two sets of spraying components are set on a main liquid supply pipeline to control the spraying of demister at symmetrical positions on both sides of the same cross section of the furnace. The two sets of spraying components spray alternately.

[0011] Step b3: Multiple sets of main liquid supply pipelines correspond to different cross-sectional positions of the furnace or to different furnaces.

[0012] As an improvement, before the normal spraying of the defoamer in the main liquid supply line, step a, an initial spray flow rate calibration step, is included, which includes:

[0013] Step a1: Set a certain flow rate value through the control system so that the demister passes through the mechanical flow meter and is sprayed normally. Compare the value of the mechanical flow meter with the system setting value. If the difference is within a certain range, the accuracy of the mechanical flow meter meets the process requirements.

[0014] As an improvement, the initial injection flow calibration also includes:

[0015] Step a2: Set a certain flow rate value through the control system so that the demister passes through the electronic flow meter and is sprayed normally. Compare the value of the electronic flow meter with the system setting value. If the difference is within a certain range, the accuracy of the electronic flow meter meets the process requirements.

[0016] As an improvement, when the flow values ​​set in steps a1 and a2 are the same, the flow values ​​detected separately are compared. If the difference between the flow values ​​measured in steps a1 and a2 meets a certain range, it is determined that the electronic flow meter and the mechanical flow meter are working normally.

[0017] As an improvement, a flow stabilizing device can be installed at the front or rear of the metering component to supply the demister at the rated flow rate.

[0018] As an improvement, step c, auxiliary injection via auxiliary fluid supply line, is also included:

[0019] Step c1: Close the valve at the rear end of the filter buffer tank a, open the solenoid valve b between the auxiliary liquid supply line and the abnormal main liquid supply line, and the defoamer in the auxiliary liquid supply line flows into the main liquid supply line to continue supplying defoamer;

[0020] As an improvement, step c, auxiliary injection of the auxiliary liquid supply pipeline, further includes: step c2, during normal liquid supply, inspecting and repairing the metering pump or filter buffer tank.

[0021] As an improvement, step d, repair of electronic component malfunctions, is also included:

[0022] In the event of a power outage, close the valves on both sides of the electronic flow meter, open the valves on both sides of the mechanical flow meter, close the manual valve on the main injection pipeline, and open the manual valve on the auxiliary injection pipeline. The defoaming agent in the filter buffer tank a passes through the mechanical flow meter and the auxiliary injection pipeline to reach the defoaming gun and be sprayed out.

[0023] Another objective of this invention is to address the shortcomings of existing technologies by providing a defoaming agent pump supply system for glass melting. This system, through a main supply pipeline and an auxiliary supply pipeline, enables online replacement and maintenance of accessories in the main supply pipeline at different locations. Simultaneously, with the addition of a metering pump a, it enables the supply of defoaming agent without a pressure tank, thus solving the technical problems in existing technologies, such as the inconvenience of storing and maintaining pressure vessels, which affects normal production.

[0024] To achieve the above objectives, the present invention provides the following technical solution:

[0025] A defoaming agent pump supply system for glass melting includes at least one main supply pipeline, an auxiliary supply pipeline, and a control system. The inlet end of the main supply pipeline is connected to the defoaming agent supply pipeline, and the outlet end is connected to the defoaming gun.

[0026] One end of the auxiliary liquid supply pipeline is connected to the liquid supply pipeline of the defoamer, and the other end is connected to the main liquid supply pipeline.

[0027] As an improvement, the main liquid supply pipeline includes: a metering pump a, a filter buffer tank a, a metering component for precise control of liquid flow, and multiple sets of injection components connected in parallel, connected in sequence.

[0028] As an improvement, the metering component is located between the filter buffer tank a and the injection component; the metering component includes an electronic flow meter and a mechanical flow meter connected in parallel.

[0029] As an improvement, the filter buffer tank a is also provided with a pressure relief component a to ensure that the filter buffer tank a is at the rated pressure.

[0030] As an improvement, the pressure relief assembly a includes a manual pressure relief valve and a solenoid pressure relief valve.

[0031] As an improvement, a detection element for detecting the inlet and outlet pressures of filter buffer tank a is also included.

[0032] As an improvement, the spraying assembly includes: a main spraying pipeline, an auxiliary spraying pipeline, and a defoaming gun.

[0033] As an improvement, the main injection pipeline is equipped with a solenoid valve a and manual valves located on both sides of the solenoid valve a; the auxiliary injection pipeline is equipped with a manual valve.

[0034] As an improvement, the front end of the injection assembly is also provided with a pressure gauge b for detecting the liquid supply pressure in the main liquid supply pipeline, and the pressure gauge b is electrically connected to the control system.

[0035] As an improvement, the output end of the auxiliary liquid supply pipeline is connected between the filter buffer tank b and the metering component. The auxiliary liquid supply pipeline includes a metering pump b and a filter buffer tank b connected in sequence. A pressure relief component b is connected to the filter buffer tank b. The output end of the filter buffer tank b is connected to the front end of the metering component on the main liquid supply pipeline.

[0036] As an improvement, when there are multiple sets of main liquid supply lines, the auxiliary liquid supply lines are connected to all sets of main liquid supply lines.

[0037] The beneficial effects of this invention are as follows:

[0038] (1) The present invention uses a main liquid supply pipeline in conjunction with an auxiliary liquid supply pipeline to enable the auxiliary liquid supply pipeline to replace the main liquid supply pipeline and continue to work when the main liquid supply pipeline needs to be repaired or malfunctions, thus avoiding the risk of machine shutdown caused by a malfunction of the main liquid supply pipeline.

[0039] (2) The present invention achieves the supply of defoaming agent for multiple furnaces by arranging multiple sets of main liquid supply pipelines, thereby reducing equipment investment costs.

[0040] (3) The present invention uses a metering pump to appropriately pressurize the defoamer, and with the setting of a filter buffer tank, the defoamer is output at the rated pressure. This solves the problem that the existing technology uses a high-pressure storage tank to supply defoamer, which affects normal production due to tank quality, maintenance cycle, etc. At the same time, the production and use of this pump supply system do not require special equipment qualifications, and the maintenance is simple and the manufacturing cost is low.

[0041] (4) The present invention sets two sets of spraying components on the main liquid supply pipeline to spray the defoaming agent alternately, adapting to different positions of the furnace for multi-position spraying, reducing the number of main liquid supply pipelines and making the equipment structure more compact.

[0042] (5) By setting up the metering components, the present invention uses a mechanical flow meter to adjust the initial required flow rate, and then uses an electronic flow meter to automatically measure and feed back to the control system in real time for adaptive adjustment during the production process, so as to ensure that the flow rate is compatible with the initial adjusted flow rate and avoid the flow rate change during the working process from affecting the normal defoaming.

[0043] (6) The present invention ensures that the pressure of the filter buffer tank is kept constant by setting a pressure relief component on the filter buffer tank, thereby improving the stability of the spray flow rate of the defoaming agent.

[0044] (7) By setting up a main injection pipeline and an auxiliary injection pipeline, the present invention enables normal liquid supply through the auxiliary injection pipeline in the event of an abnormal power outage, thereby avoiding the occurrence of a situation where normal liquid supply cannot be provided due to a power outage and ensuring normal production.

[0045] (8) By setting a back pressure valve, the present invention ensures the stability of the output flow rate by outputting the volume in the pipeline at the rated pressure, thereby avoiding the phenomenon of unstable flow rate caused by insufficient solution pressure, which prevents the solution from filling the pipe.

[0046] In summary, the present invention has advantages such as eliminating the need for storing defoaming agent in a high-pressure container and enabling simultaneous liquid supply through multiple liquid supply pipelines. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0049] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 1 ;

[0050] Figure 4 This is a schematic diagram of the internal structure of the present invention. Figure 2 ;

[0051] Figure 5 This is a simplified diagram of the pipeline path of the present invention;

[0052] Figure 6 This is a simplified diagram of the pipeline path in Embodiment Seven of the present invention;

[0053] Figure 7 This is a simplified diagram of the pipeline path in Embodiment 8 of the present invention. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] Example 1

[0057] like Figures 1-5 As shown, this embodiment provides a defoaming process for glass melting, including:

[0058] Step b: Defoamer is sprayed normally in the main fluid supply line:

[0059] Step b1: Close the calibration pipeline 134, and leave the normal liquid supply pipeline 133 as a closed circuit. Turn on the metering pump a11. When the pressure gauge detects that the pipeline pressure meets the injection conditions, the solenoid valve a141 of the injection assembly 14 opens, and the defoaming agent is sprayed out from the defoaming gun 142. The flow rate value of the electronic flow meter 131 is compared with the flow rate value preset by the control system, and the metering pump a11 is controlled to adjust the flow rate in real time accordingly. The control system 3 controls the injection time to control the single injection flow rate, thereby achieving high-precision quantitative injection flow rate.

[0060] Step b2: Two sets of spraying components 14 are set in a main liquid supply pipeline 1 to control the spraying of demister at symmetrical positions on both sides of the same cross section of the furnace. The two sets of spraying components 14 spray alternately to achieve the same amount of demister at the same cross section position of the furnace, thus achieving high-precision quantitative spraying.

[0061] Step b3: Multiple sets of main liquid supply pipelines 1 correspond to different cross-sectional positions of the furnace or different furnaces. The defoaming agent is sprayed differently according to different positions to achieve high-precision defoaming and avoid waste of defoaming agent.

[0062] It should be noted that as the furnace moves backward, the amount of foam floating inside gradually decreases. Therefore, the amount of defoamer used also gradually decreases. By using different spraying components 14 for defoamer at different locations, the amount of defoamer used can be precisely controlled to avoid waste. At the same time, at the same cross-sectional location, two sets of spraying components are used alternately to increase the reaction time between the defoamer and the foam, preventing a large amount of defoamer from being sprayed and accumulated continuously, thus reducing the amount of defoamer used and improving the defoaming quality.

[0063] Furthermore, the defoaming agent in this application is preferably a nano-sized defoaming agent. Commercially available nano-sized defoamers can be selected. Solvents that can defoam and defoam during the glass melting process are all applicable to the defoaming process of this application.

[0064] As an improvement, before the normal spraying of the defoamer in the main liquid supply line, step a, an initial spray flow rate calibration step, is included, which includes:

[0065] Step a1: Set a certain flow rate value through the control system 3 so that the defoaming agent passes through the mechanical flow meter 132 and is sprayed normally. Compare the value of the mechanical flow meter with the system setting value. If the difference is within a certain range, the accuracy of the mechanical flow meter 132 meets the process requirements.

[0066] Specifically, close the valves on both sides of the electronic flow meter 131, open the valves on both sides of the mechanical flow meter 132, and turn on the metering pump a11. When the pressure gauge detects that the pipeline pressure meets the injection conditions, the solenoid valve a141 of the injection assembly 14 opens, and the defoaming agent is sprayed out from the defoaming gun 142. The value of the mechanical flow meter is compared with the system set value. If the difference is within a certain range, the process requirements are met. Specifically, if the difference is less than 5%, the corresponding flow meter is determined to meet the process requirements.

[0067] Preferably, the initial injection flow calibration further includes:

[0068] Step a2: Set a certain flow rate value through the control system 3 so that the defoaming agent passes through the electronic flow meter 131 and is sprayed normally. Compare the value of the electronic flow meter 131 with the system set value. If the difference is within a certain range, the accuracy of the electronic flow meter 131 meets the process requirements.

[0069] Specifically, the valves on both sides of the mechanical flow meter 132 are closed, the valves on both sides of the electronic flow meter 131 are opened, and a certain flow value is set through the control system 3. The metering pump a11 is turned on. When the pressure gauge detects that the pipeline pressure meets the injection conditions, the solenoid valve a141 of the injection assembly 14 is opened, and the defoaming agent is sprayed out from the defoaming gun 142. The value of the electronic flow meter 131 is compared with the system setting value. If the difference is within a certain range, the process requirements are met. Specifically, if the difference is less than 5%, the corresponding flow meter is determined to meet the process requirements.

[0070] Furthermore, when the flow rates set in steps a1 and a2 are the same, the measured flow rates are compared. If the difference between the flow rates measured in steps a1 and a2 meets a certain range, it is determined that both the electronic and mechanical flow meters are working normally, thus achieving mutual calibration between the mechanical and electronic flow meters. It should be noted that if the difference between the electronic and mechanical flow meters is within 2%, both the mechanical and electronic flow meters are considered to be functioning normally.

[0071] Meanwhile, in step a1 or step a2, the on-site operator determines whether the spray flow rate meets the requirements based on the spray effect, and adjusts the spray flow rate accordingly. After the debugging is completed, the flow rate value is fed back to the control system 3 as the process setting value of the flow rate of the main liquid supply pipeline 1.

[0072] Preferably, a flow stabilizing device 6 is provided at the front or rear end of the metering component 13 to ensure that the defoaming agent is supplied at the rated flow rate. Specifically, the flow stabilizing device 6 ensures that the liquid always maintains a certain pressure output to avoid insufficient pressure causing the solvent to not fill the pipeline, thereby affecting the flow rate in the pipeline and the defoaming quality.

[0073] In this embodiment, step c, auxiliary injection via auxiliary fluid supply pipeline, is also included:

[0074] Step c1: Close the valve at the rear end of the filter buffer tank a12, open the solenoid valve b24 between the auxiliary liquid supply line 2 and the abnormal main liquid supply line 1, and the defoamer in the auxiliary liquid supply line 2 flows into the main liquid supply line 1 to continue supplying defoamer.

[0075] Furthermore, step c, auxiliary injection of the auxiliary liquid supply pipeline, also includes: step c2, during normal liquid supply, inspection and maintenance of the metering pump or filter buffer tank, which does not affect normal production.

[0076] This embodiment also includes step d, repairing electronic components malfunctions:

[0077] In the event of a power outage, close the valves on both sides of the electronic flow meter 131, open the valves on both sides of the mechanical flow meter 132, close the manual valve on the main injection pipeline 145, open the manual valve on the auxiliary injection pipeline 144, and the defoaming agent in the filter buffer tank a12 will reach the defoaming gun 142 and be sprayed out through the mechanical flow meter and the auxiliary injection pipeline 144.

[0078] It should be noted that when electronic components malfunction and require repair, the electrical box needs to be powered off for maintenance. Under normal operating conditions, after a power outage, the electronic components cannot function properly, resulting in the inability to supply liquid normally and the inability to spray the defoaming agent normally, which seriously affects the kiln production. In this embodiment, the valves on both sides of the mechanical flow meter 132 are opened, the valves on both sides of the electronic flow meter 131 are closed, the manual valve on the main injection pipeline 145 is closed, and the manual valve on the auxiliary injection pipeline 144 is opened. At this time, the defoaming agent in the filter buffer tank a12 passes through the mechanical flow meter and the auxiliary injection pipeline 144 to reach the defoaming gun 142 and is sprayed out, unaffected by the power outage, ensuring normal furnace production. This solves the technical problem of the inability to supply liquid normally after a power outage in the prior art.

[0079] In addition, after an abnormal power outage, the liquid supply time can be adapted according to the volume of the filter buffer tank a12 to ensure normal liquid supply for a certain period of time, when the pressure in the filter buffer tank a12 is insufficient to supply liquid.

[0080] Example 2

[0081] like Figures 1-5 As shown, this embodiment provides a defoaming agent pump supply system for glass melting, used to implement the defoaming process for glass melting described in Embodiment 1. The pump supply system includes a cabinet 5, at least one main liquid supply pipeline 1, an auxiliary liquid supply pipeline 2, and a control system 3. The inlet end of the main liquid supply pipeline 1 is connected to the defoaming agent supply pipeline 4, and the outlet end is connected to the defoaming gun 142. It should be noted that the defoaming gun 142 uses compressed air to carry liquid atomization spray, which is existing technology, and its detailed structure will not be described in detail.

[0082] One end of the auxiliary liquid supply pipeline 2 is connected to the defoamer supply pipeline 4, and the other end is connected to the main liquid supply pipeline 1. The control system 3 can be controlled by a PLC, which is an existing technology, and the detailed principle will not be described in this application.

[0083] It should be noted that the main liquid supply pipeline 1 is provided with at least one set. In this embodiment, two sets are preferably provided for spraying defoaming agent on different kilns.

[0084] As an improvement, the main liquid supply line 1 includes: a metering pump a11, a filter buffer tank a12, a metering component 13 for precise control of liquid flow rate, and multiple sets of injection components 14 connected in parallel, connected in sequence. The metering pump a11 is electrically connected to the control system 3, and the control system 3 sends signals to control the operation of the metering pump.

[0085] Preferably, the filter buffer tank a12 is equipped with a pressure gauge a121 for detecting the pressure inside the tank.

[0086] It should be noted that the parallel-connected spraying components 14 enable precise control of each group of spraying components 14 to spray the defoaming agent quantitatively and accurately. At the same time, multiple groups of spraying components 14 spray in sequence to achieve periodic cyclic spraying at different positions, thus achieving high-precision quantitative spraying of the defoaming agent.

[0087] Specifically, the glass furnace consists of multiple small furnaces connected in series. Each small furnace is equipped with a liquid supply pipeline, and two spraying components 14 are installed on both sides of each small furnace for periodically spraying defoaming agent into the furnace.

[0088] The metering pump a11 can be any structure that can achieve quantitative metering and transmission, such as an electrically controlled metering diaphragm pump, a plunger pump, a gear pump, a screw pump, etc.; in this embodiment, an electrically controlled metering diaphragm pump is preferred.

[0089] Preferably, the main liquid supply line 1, the auxiliary liquid supply line 2, and the control system 3 are integrated into the cabinet 5 to form an integrated cabinet structure, thereby improving the compactness of the equipment.

[0090] Example 3

[0091] like Figures 1-5 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 3 and Embodiment 2 is as follows:

[0092] In this embodiment, the metering component 13 is disposed between the filter buffer tank a12 and the spraying component 14;

[0093] The metering component 13 includes a normal liquid supply pipeline 133 and a calibration pipeline 134 connected in parallel. An electronic flow meter 131 is installed on the normal liquid supply pipeline 133, and two valves are installed at both ends of the electronic flow meter 131.

[0094] The calibration pipeline 134 is equipped with a mechanical flow meter 132 and valves located at both ends of the mechanical flow meter 132; the mechanical flow meter 132 may be a rotor flow meter.

[0095] In this embodiment, the mechanical flow meter 132 can be an optional rotor flow meter to achieve manual adjustment and control of the flow rate.

[0096] The electronic flow meter 131 can be equipped with a digital flow meter, and the flow rate of the digital flow meter can be controlled by the control system 3.

[0097] It should be noted that during the debugging process, the electronic flow meter 131 is turned off and the mechanical flow meter 132 is turned on. After testing the solution flow rate required for a single spray of defoamer through the flow control of the mechanical flow meter 132, the data is fed back to the PLC control system 3 to achieve the normal working flow rate value of the main liquid supply pipeline 1. During normal operation, the mechanical flow meter 132 is turned off and the electronic flow meter 131 is turned on. The electronic flow meter 131 detects the flow rate of the spraying process in real time according to the required flow rate value recorded by the PLC control system 3 and feeds it back to the control system. The control system automatically controls the spraying time, thereby achieving high-precision defoamer spraying.

[0098] Example 4

[0099] like Figures 1-5 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 4 and Embodiment 2 is as follows:

[0100] In this embodiment, the filter buffer tank a12 is also provided with a pressure relief component a122 to ensure that the filter buffer tank a12 is at the rated pressure. The pressure relief component a122 avoids excessive pressure from causing safety hazards to the filter buffer tank a12.

[0101] Preferably, the filter buffer tank a12 ensures that the defoaming agent is output at a sufficiently stable rated pressure, improves the consistency of the defoaming agent sprayed by the defoaming gun 142 per unit time, and thus improves the accuracy of the amount of defoaming agent added.

[0102] Furthermore, the pressure relief assembly a122 includes a manual pressure relief valve 1221 and an electromagnetic pressure relief valve 1222. Pressure can be relieved manually at regular intervals, or automatically by means of the electromagnetic pressure relief valve 1222. That is, when the pressure inside the tank exceeds the set pressure of the electromagnetic pressure relief valve 1222, the electromagnetic pressure relief valve 1222 will open automatically to relieve pressure and ensure that the pressure inside the filter buffer tank a12 remains constant.

[0103] Preferably, it also includes a detection element for detecting the inlet and outlet pressures of the filter buffer tank a12.

[0104] It should be noted that the detection element can be any pressure sensor, pressure gauge, or other pressure-detecting device. The data is compared through the PLC control system 3. If the outlet pressure is significantly lower than the inlet pressure, it is determined that the filter device in the filter buffer tank a12 is blocked, affecting the normal delivery of the defoaming agent. A feedback signal is sent to the operator to repair or replace the filter device in the filter buffer tank a12.

[0105] Example 5

[0106] like Figures 1-5 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 5 and Embodiment 2 is as follows:

[0107] In this embodiment, the spraying assembly 14 includes: a main spraying pipeline 145, an auxiliary spraying pipeline 144, and a defoaming gun 142 for spraying defoaming agent.

[0108] Preferably, the main injection pipeline 145 is provided with a solenoid valve a141 and manual valves located on both sides of the solenoid valve a141; the auxiliary injection pipeline 144 is provided with a manual valve.

[0109] It should be noted that the solenoid valve A141 automatically controls the on / off state of the defoaming gun 142 to achieve quantitative and timed spraying.

[0110] Furthermore, when electronic components malfunction and require repair, the electrical box needs to be powered off for maintenance. Under normal operating conditions, a power outage prevents normal liquid supply, resulting in the inability to spray the defoaming agent properly, severely impacting kiln production. This embodiment addresses this by opening the valves on both sides of the mechanical flowmeter 132, closing the valves on both sides of the electronic flowmeter 131, closing the manual valve on the main injection pipeline 145, and opening the manual valve on the auxiliary injection pipeline 144. At this time, the defoaming agent in the filter buffer tank a12 passes through the mechanical flowmeter and auxiliary injection pipeline 144 to reach the defoaming gun 142 and is sprayed out, unaffected by power outages, ensuring normal furnace production. This solves the technical problem of inability to supply liquid properly after a power outage in existing technologies.

[0111] Furthermore, after an abnormal power outage, the duration of liquid supply can be adapted to the volume of the filter buffer tank a12 to ensure normal liquid supply for a certain period. However, if the pressure inside the filter buffer tank a12 is insufficient to supply liquid...

[0112] Preferably, the front end of the injection assembly 14 is further provided with a pressure gauge b143 for detecting the supply pressure in the main liquid supply pipeline 1. The pressure gauge b143 is electrically connected to the control system 3 and feeds back the detection result to the control system 3. When the value of the pressure gauge b143 exceeds the rated 0.4 MPa, an alarm is triggered; when it exceeds the rated 0.5 MPa, the electrically controlled metering diaphragm pump stops to prevent pipeline pressure from exceeding the standard and affecting pipeline safety. Of course, the specific value exceeding the rated value can be adapted to different operating conditions or circumstances.

[0113] Example 6

[0114] like Figures 1-5 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 will be described below. The difference between Embodiment 6 and Embodiment 2 is as follows:

[0115] In this embodiment, the output end of the auxiliary liquid supply pipeline 2 is connected between the filter buffer tank a12 and the metering component 13. The auxiliary liquid supply pipeline 2 includes a metering pump b21 and a filter buffer tank b22 connected in sequence. A pressure relief component b23 is connected to the filter buffer tank b22. The output end of the filter buffer tank b22 is connected to the front end of the metering component 13 on the main liquid supply pipeline 1.

[0116] Furthermore, when the main liquid supply line 1 is provided with multiple sets, the auxiliary liquid supply line 2 is connected to all sets of the main liquid supply line 1.

[0117] It should be noted that when the metering pump b21 and the filter buffer tank b22 of the main liquid supply line 1 need maintenance or malfunction, the valve at the rear end of the filter buffer tank b22 of the main liquid supply line 1 should be disconnected, and the valve between the auxiliary liquid supply line 2 and the main liquid supply line 1 should be opened. This allows for maintenance and repair operations without interrupting production, avoiding production line shutdowns that could affect normal production. This is especially important for glass manufacturers, where kilns operate continuously, and any shutdown would have a significant impact on normal production.

[0118] The auxiliary liquid supply line 2 of this application shares the same metering component 13 with the rear end of the main liquid supply line 1, so that the replacement process does not require adjustment of the parameters of the metering component 13, thus achieving uninterrupted replacement. When a sudden failure occurs, it can be adjusted and replaced immediately.

[0119] Meanwhile, the valve between the auxiliary liquid supply line 2 and the main liquid supply line 1 can be set as a solenoid valve b24 to achieve remote control and automatic switching, so as to avoid the operator not being able to detect sudden failures in time and affect normal production.

[0120] Example 7

[0121] like Figure 6As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as in Embodiment 2. For simplicity, only the differences from Embodiment 2 are described below. The difference between Embodiment 7 and Embodiment 2 is as follows:

[0122] In this embodiment, a defoaming agent pump supply system for glass melting also includes a flow stabilizing device 6 for outputting the defoaming agent at a stable flow rate. The flow stabilizing device 6 is preferably a back pressure valve, which outputs the defoaming agent in the pipeline at a certain pressure, thereby ensuring a constant output flow rate.

[0123] The flow stabilizing device 6 is located at the rear end of the metering component 13.

[0124] The metering component 13 includes a normal liquid supply line 133 and a calibration line 134 connected in parallel. Two valves are provided at both ends of the normal liquid supply line 133.

[0125] The calibration pipeline 134 is equipped with a mechanical flow meter 132 and valves located at both ends of the mechanical flow meter 132; the mechanical flow meter 132 may be a rotor flow meter.

[0126] It should be noted that during the commissioning process, the valves on both sides of the normal liquid supply pipeline 133 are closed, and the valves on both sides of the mechanical flow meter 132 are opened. After testing the solution flow rate required for a single spray of defoamer through the flow control of the mechanical flow meter 132, the data is fed back to the PLC control system 3. The control system 3 controls the flow rate of the metering pump a11 based on the flow rate value, such as controlling the opening of the diaphragm pump, to achieve the normal working flow rate value of the main liquid supply pipeline 1. During normal operation, the valves on both sides of the mechanical flow meter 132 are closed, and the valves on both sides of the normal liquid supply pipeline 133 are opened, so that the liquid is continuously supplied along the normal liquid supply pipeline 133. The flow stabilizing device 6 ensures that the defoamer is supplied at a constant flow rate, guaranteeing the accuracy of the defoamer spray volume.

[0127] Furthermore, this embodiment does not require the setting of an electronic flow meter. After the initial flow rate is calibrated using a mechanical flow meter, the control system controls the metering pump a to always output at a certain flow rate. The flow stabilizing device 6 is used to solve the technical problem that the pressure in the buffer tank is insufficient to meet the pressure required for the rated flow rate output during the initial supply process.

[0128] Example 8

[0129] like Figure 7 As shown, components that are the same as or corresponding to those in Embodiment 2 are referred to using the same reference numerals as those in Embodiment 2. For simplicity, only the differences from Embodiment 2 will be described below. The difference between Embodiment 8 and Embodiment 2 is as follows:

[0130] In this embodiment, a defoaming agent pump supply system for glass melting also includes a flow stabilizing device 6 for outputting a stable flow rate. The flow stabilizing device 6 is preferably a back pressure valve, which allows the defoaming agent in the pipeline to be output at a certain pressure, thereby ensuring a constant output flow rate.

[0131] The flow stabilizing device 6 is located at the front end of the metering component 13.

[0132] The output end of the auxiliary liquid supply pipeline 2 is located at the front end of the flow stabilizing device 6.

[0133] In this embodiment, the metering component 13 is located between the flow stabilizing device 6 and the injection component 14; the metering component 13 includes an electronic flow meter 131 and a mechanical flow meter 132 connected in parallel.

[0134] In this embodiment, the mechanical flow meter 132 can be an optional rotor flow meter to achieve manual adjustment and control of the flow rate.

[0135] The electronic flow meter 131 can be equipped with a digital flow meter, and the flow rate of the digital flow meter can be controlled by the control system 3.

[0136] It should be noted that during the debugging process, the electronic flow meter 131 is turned off and the mechanical flow meter 132 is turned on. After testing the solution flow rate required for a single spray of defoamer through the flow control of the mechanical flow meter 132, the data is fed back to the PLC control system 3 to achieve the normal working flow rate value of the main liquid supply pipeline 1. During normal operation, the mechanical flow meter 132 is turned off and the electronic flow meter 131 is turned on. The electronic flow meter 131 detects the flow rate of the spraying process in real time according to the required flow rate value recorded by the PLC control system 3 and feeds it back to the control system. The control system automatically controls the spraying time, thereby achieving high-precision defoamer spraying.

[0137] In addition, by setting the flow stabilizing device 6, the liquid flow rate through the electronic flow meter is kept constant, avoiding the instability of the flow rate causing the electronic flow meter to detect a discrepancy with the preset flow rate value, thereby preventing the feedback control system from frequently adjusting the output flow rate of the metering pump a11 and affecting the stable operation of the system.

[0138] In addition, the flow stabilizing device 6 enables a highly stable and precise supply of defoaming agent, thereby improving the defoaming quality during the glass melting process.

[0139] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A defoaming process for glass melting, characterized in that, include: Step b: Defoamer is sprayed normally in the main fluid supply line: Step b1: Close the calibration pipeline (134), the normal liquid supply pipeline (133) is the passage, turn on the metering pump a (11), the solenoid valve a (141) of the spray assembly (14) is opened, the defoaming agent is sprayed out from the defoaming gun (142), the flow value of the electronic flow meter (131) is compared with the flow value preset by the control system, and the metering pump a (11) is controlled to adjust the flow in real time accordingly, and the control system (3) controls the single spray flow rate; Step b2: A set of main liquid supply pipeline (1) is equipped with two sets of spraying components (14) to control the spraying of demister at symmetrical positions on both sides of the same cross section of the furnace. The two sets of spraying components (14) spray alternately. Step b3, multiple sets of main liquid supply pipelines (1) correspond to different cross-sectional positions of the furnace or to different furnaces; A flow stabilizing device (6) is installed at the front or rear end of the metering component (13) to supply the demister at the rated flow rate.

2. A defoaming process for glass melting according to claim 1, characterized in that, Before the normal spraying of the defoamer in the main liquid supply line, the procedure also includes step a, an initial spray flow rate calibration step, which includes: Step a1: Set a certain flow rate value through the control system (3) so that the defoaming agent can be sprayed normally after passing through the mechanical flow meter (132). Compare the value of the mechanical flow meter with the system setting value. If the difference is within a certain range, the accuracy of the mechanical flow meter (132) meets the process requirements. Step a2: Set a certain flow rate value through the control system (3) so that the defoaming agent can be sprayed normally after passing through the electronic flow meter (131). Compare the value of the electronic flow meter (131) with the system setting value. If the difference is within a certain range, the accuracy of the electronic flow meter (131) meets the process requirements.

3. A defoaming process for glass melting according to claim 2, characterized in that, When the flow rates set in steps a1 and a2 are the same, the flow rate values ​​detected in each step are compared. If the difference between the flow rate values ​​measured in steps a1 and a2 meets a certain range, it is determined that the electronic flow meter and the mechanical flow meter are working normally.

4. A defoaming process for glass melting according to claim 1, characterized in that, It also includes step c, auxiliary injection via auxiliary fluid supply pipeline: Step c1: Close the valve at the back end of the filter buffer tank a (12), open the solenoid valve b (24) between the auxiliary liquid supply line (2) and the abnormal main liquid supply line (1), and the defoamer in the auxiliary liquid supply line (2) flows into the main liquid supply line (1) to continue supplying defoamer.

5. A defoaming process for glass melting according to claim 4, characterized in that, Step c, auxiliary injection of auxiliary liquid supply pipeline, also includes: step c2, during normal liquid supply, inspecting and repairing the metering pump or filter buffer tank.

6. A defoaming process for glass melting according to claim 1, characterized in that, It also includes step d, repair of electronic component malfunctions: When the power is off, close the valves on both sides of the electronic flow meter (131), open the valves on both sides of the mechanical flow meter (132), close the manual valve on the main injection pipeline (145), open the manual valve on the auxiliary injection pipeline (144), and the defoaming agent in the filter buffer tank a (12) will reach the defoaming gun (142) and be sprayed out through the mechanical flow meter and the auxiliary injection pipeline (144).

7. A defoaming agent pump supply system for a glassmelting defoaming process according to any one of claims 1 to 6, characterized in that It includes at least one main liquid supply line (1), an auxiliary liquid supply line (2) and a control system (3). The inlet end of the main liquid supply line (1) is connected to the liquid supply line (4) of the defoaming agent, and the outlet end is connected to the defoaming gun (142). One end of the auxiliary liquid supply pipeline (2) is connected to the liquid supply pipeline (4) of the defoamer, and the other end is connected to the main liquid supply pipeline (1); The main liquid supply pipeline (1) includes: a metering pump a (11), a filter buffer tank a (12), a metering component (13) for precise control of liquid flow, and multiple sets of parallel injection components (14) connected in sequence. The metering component (13) is located between the filter buffer tank a (12) and the injection component (14); the metering component (13) includes an electronic flow meter (131) and a mechanical flow meter (132) connected in parallel. The system also includes a flow stabilizing device (6) installed at the front or rear end of the metering component (13).

8. A defoaming agent pump supply system for glass melting according to claim 7, characterized in that, The spray assembly (14) includes: a main spray pipeline (145), an auxiliary spray pipeline (144), and a defoaming gun (142); the main spray pipeline (145) is provided with a solenoid valve a (141) and manual valves on both sides of the solenoid valve a (141); the auxiliary spray pipeline (144) is provided with a manual valve.

9. A defoaming agent pump supply system for glass melting according to claim 7, characterized in that, The output end of the auxiliary liquid supply pipeline (2) is connected between the filter buffer tank b (22) and the metering component (13). The auxiliary liquid supply pipeline (2) includes a metering pump b (21) and a filter buffer tank b (22) connected in sequence. A pressure relief component b (23) is connected to the filter buffer tank b (22). The output end of the filter buffer tank b (22) is connected to the front end of the metering component (13) on the main liquid supply pipeline (1).

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