Defoaming process for glass melting and defoaming agent pumping system

Abstract

The invention relates to the technical field of defoaming agent liquid supply, in particular to a defoaming process for glass melting and a defoaming agent pump supply system.The defoaming process for glass melting comprises the steps that b1, a calibration pipeline is closed, a normal liquid supply pipeline is a passage, a metering pump a is opened, an electromagnetic valve a of a spraying assembly is opened, and a defoaming agent is sprayed out from a defoaming gun; b2, one main liquid supply pipeline is provided with two spraying assemblies used for controlling spraying of a defoaming agent at the symmetrical positions of the two sides of the same section of the smelting furnace, and the two spraying assemblies conduct spraying alternately; b3, the multiple sets of main liquid supply pipelines correspond to different section positions of the smelting furnace or correspond to different smelting furnaces; by arranging the two spraying assemblies on the main liquid supply pipeline, quantitative spraying of the defoaming agent at the same cross section position of the kiln is achieved, the spraying amount of the defoaming agent at the different cross section positions of the kiln is set as needed in cooperation with the arrangement of the multiple main liquid supply pipelines, and the usage amount of the defoaming agent is reduced while the defoaming quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of defoaming agent liquid supply, in particular to a defoaming process for glass melting and a defoaming agent pump supply system. Background Art

[0002] During the production of photovoltaic glass, the raw materials need to be melted into glass liquid and then rolled to form glass. During the melting process, a large number of bubbles will be generated, resulting in a decrease in the efficiency of the furnace and seriously affecting production efficiency. Therefore, defoaming agents or defoaming agents are usually sprayed on the molten glass liquid to control the foam in the furnace, thereby improving the production efficiency of the furnace.

[0003] Chinese patent CN202421599116.7 discloses a skid-mounted defoamer liquid supply device for glass melting, which is used to spray defoamer onto the white foam area in the glass melting field. The device comprises a skid; an electrical cabinet module for electronically controlling liquid supply, a tank module for storing the agent, a piping system connected to the tank module, and an infusion pump module for adding the agent to the tank module in conjunction with the piping system. The electrical cabinet module, tank module, piping system, and infusion pump module are integrally mounted on the skid. The present invention integrates the electrical cabinet, tank module, infusion pump module, piping system, flow control, liquid level monitoring, control valves, regulating valves, etc. in a skid-mounted manner, thereby effectively saving installation space, accelerating installation progress, saving materials, and achieving standardization. This device solves technical problems existing in the prior art, such as the complex structure of the defoamer liquid supply system, the large footprint, the difficulty of installation, and the long construction period.

[0004] However, this technical solution requires storing the defoaming agent in a high-pressure tank, filling the top of the tank with compressed air to make the storage tank form a high-pressure state, and when the defoaming agent needs to be sprayed, the defoaming agent in the storage tank is transported to the defoaming gun through the pipeline system under the pressure of the compressed air. It can be seen that the tank liquid supply system for pressurizing with compressed air involves a pressure vessel, which needs to be supervised and managed in accordance with the relevant management regulations for special pressure vessels during the use and manufacturing processes. Frequent inspection and replacement are required in the actual production process, resulting in problems such as production suspension. At the same time, if the pressure in the pressure vessel storing the defoaming agent changes, it will also affect the atomization effect of the defoaming gun, thereby affecting the defoaming quality in the kiln, and the investment cost of the special equipment defoaming system is high. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the existing technology and provide a defoaming process for glass melting. After the defoamer is appropriately pressurized by a metering pump, it is sprayed out through a defoaming gun. During the spraying process, compressed air is used to atomize the defoamer at the outlet of the defoaming gun, thereby solving the traditional method of requiring the entire storage tank to be stored at high pressure for defoaming, which leads to inconvenience in system operation and maintenance and affects production. At the same time, two groups of injection components are arranged on the main liquid supply pipeline to realize quantitative injection of defoamer at the same cross-sectional position of the kiln. In conjunction with the setting of multiple groups of main liquid supply pipelines, the injection amount of defoamer at different cross-sectional positions of the kiln can be set as needed, thereby improving the defoaming quality while reducing the amount of defoamer used.

[0006] To achieve the above object, the present invention provides the following technical solutions: A defoaming process for glass melting, comprising: Step b: Normal spraying of defoamer in the main liquid supply pipeline: Step b1, close the calibration pipeline, leave the normal liquid supply pipeline as the passage, turn on the metering pump a, open the solenoid valve a of the injection assembly, and spray the defoaming agent 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 rate in real time accordingly. The control system controls the injection time and thus the single injection flow rate; Step b2: two groups of spray assemblies are provided on one set of main liquid supply pipelines, respectively used to control the spraying of defoaming agent at symmetrical positions on both sides of the same cross section of the furnace, and the two groups of spray assemblies spray alternately; Step b3: multiple groups of main liquid supply pipelines correspond to different cross-sectional positions of the furnace or correspond to different furnaces.

[0007] As an improvement, before the normal injection step of the defoamer in the main liquid supply pipeline, step a, initial injection flow calibration step is also included, and the initial injection flow calibration includes: Step a1, setting a certain flow value through the control system, allowing only the defoaming agent to pass through the mechanical flow meter and be sprayed normally, comparing the value of the mechanical flow meter with the system set value, and if the difference is within a certain range, the accuracy of the mechanical flow meter meets the process requirements; As an improvement, the initial injection flow calibration further includes: Step a2: set a certain flow value through the control system, so that only the defoaming agent 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.

[0008] As an improvement, when the flow values set in step a1 and step a2 are the same, the flow values detected respectively are compared. If the difference between the flow values measured in step a1 and step a2 meets a certain range, it is determined that the electronic flowmeter and the mechanical flowmeter are working properly.

[0009] As an improvement, a flow stabilizing device is provided at the front end or rear end of the metering component so that the defoaming agent is supplied at a rated flow rate.

[0010] As an improvement, the method further includes step c, auxiliary injection through the auxiliary liquid supply pipeline: 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 the defoamer; As an improvement, the step c, auxiliary injection of the auxiliary liquid supply pipeline, further comprises: step c2, during the normal liquid supply process, inspecting and repairing the metering pump or the filter buffer tank.

[0011] As an improvement, the method further includes step d: abnormal repair of electronic components: When the power is off, 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, open the manual valve on the auxiliary injection pipeline, and the defoamer 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.

[0012] Another object of the present invention is to address the shortcomings of the existing technology and provide a defoaming agent pump supply system for glass melting. By coordinating the main liquid supply pipeline with the auxiliary liquid supply pipeline, the accessories of the main liquid supply pipeline can be replaced and repaired on different lines online. At the same time, by coordinating with the setting of the metering pump a, the supply of defoaming agent can be completed without pressure tank liquid supply, solving technical problems in the existing technology such as the inconvenience of pressure vessel storage and maintenance affecting normal production.

[0013] To achieve the above object, the present invention provides the following technical solutions: A defoamer pump supply system for glass melting includes at least one set of main liquid supply pipelines, auxiliary liquid supply pipelines, and a control system. The inlet end of the main liquid supply pipeline is connected to the defoamer supply pipe, and the outlet end is connected to the defoaming gun. One end of the auxiliary liquid supply pipeline is connected to the liquid supply pipe of the defoamer, and the other end is connected to the main liquid supply pipeline.

[0014] As an improvement, the main liquid supply pipeline includes: a metering pump a, a filter buffer tank a, a metering component for accurately controlling the liquid flow, and multiple groups of injection components arranged in parallel, which are connected in sequence.

[0015] As an improvement, the metering component is arranged between the filter buffer tank a and the injection component; the metering component includes an electronic flowmeter and a mechanical flowmeter connected in parallel.

[0016] As an improvement, the filtering buffer tank a is further provided with a pressure relief component a for ensuring that the filtering buffer tank a is at a rated pressure.

[0017] As an improvement, the pressure relief assembly a includes a manual pressure relief valve and an electromagnetic pressure relief valve.

[0018] As an improvement, it also includes a detection element for detecting the inlet pressure and outlet pressure of the filter buffer tank a.

[0019] As an improvement, the injection assembly includes: a main injection pipeline, an auxiliary injection pipeline and a defoaming gun.

[0020] As an improvement, the main injection pipeline is provided with a solenoid valve a and manual valves on both sides of the solenoid valve a; the auxiliary injection pipeline is provided with a manual valve.

[0021] As an improvement, a pressure gauge b for detecting the liquid supply pressure in the main liquid supply pipeline is further provided at the front end of the injection assembly, and the pressure gauge b is electrically connected to the control system.

[0022] 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, and the filter buffer tank b is connected to a pressure relief component 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.

[0023] As an improvement, when multiple groups of main liquid supply pipelines are provided, the auxiliary liquid supply pipelines are connected to the multiple groups of main liquid supply pipelines.

[0024] The beneficial effects of the present invention are: (1) The present invention cooperates with the auxiliary liquid supply pipeline through the main liquid supply pipeline, so that when the main liquid supply pipeline needs to be repaired or fails, the auxiliary liquid supply pipeline replaces the main liquid supply pipeline and continues to work, thereby avoiding the risk of downtime caused by failure of the main liquid supply pipeline.

[0025] (2) The present invention realizes the supply of defoaming agent to multiple furnaces by arranging multiple groups of main liquid supply pipelines, thereby reducing equipment investment costs.

[0026] (3) The present invention appropriately pressurizes the defoamer through a metering pump and cooperates with the setting of a filter buffer tank to output the defoamer at a rated pressure. This solves the problem that the existing technology uses a high-pressure storage tank to provide the defoamer, which affects normal production due to the quality of the tank body and the maintenance cycle. At the same time, the production and use of this pump supply system do not require special equipment related qualifications, and the maintenance is simple and the manufacturing cost is low.

[0027] (4) The present invention provides two groups of spraying components on the main liquid supply pipeline, spraying the defoaming agent alternately, adapting to the multi-position spraying at different positions of the furnace, reducing the number of main liquid supply pipelines, and making the equipment structure more compact.

[0028] (5) The present invention uses a metering component to set up a mechanical flow meter to debug the initial required flow rate. The production process uses an electronic flow meter to automatically measure and feed back to the control system in real time for adaptive adjustment, ensuring that the flow rate is compatible with the initially adjusted flow rate, avoiding the flow rate changes during the working process affecting normal defoaming.

[0029] (6) The present invention provides a pressure relief assembly on the filter buffer tank to ensure that the pressure of the filter buffer tank remains constant, thereby improving the stability of the spray flow rate of the defoaming agent.

[0030] (7) The present invention provides a main injection pipeline and an auxiliary injection pipeline to ensure normal liquid supply through the auxiliary injection pipeline when there is an abnormal power outage, thereby avoiding the occurrence of a site where normal liquid supply cannot be achieved due to a power outage and ensuring normal production.

[0031] (8) The present invention sets a back pressure valve so that the volume in the pipeline is output at the rated pressure, thereby ensuring the stability of the output flow rate and avoiding the phenomenon of insufficient solution pressure, which causes the solution to be unable to fill the pipe and causes unstable flow rate.

[0032] In summary, the present invention has the advantages of not requiring a high-pressure container to store the defoaming agent and synchronously supplying liquid through multiple liquid supply pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ; Figure 3 Schematic diagram of the internal structure of the present invention Figure 1 ; Figure 4 Schematic diagram of the internal structure of the present invention Figure 2 ; Figure 5 This is a simplified diagram of the pipeline path of the present invention; Figure 6 This is a simplified diagram of the pipeline path of Example 7 of the present invention; Figure 7 This is a simplified diagram of the pipeline path of Example 8 of the present invention. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0036] Example 1 like Figure 1-Figure 5 As shown, this embodiment provides a defoaming process for glass melting, comprising: Step b: Normal spraying of defoamer in the main liquid supply pipeline: Step b1, close the calibration pipeline 134, the normal liquid supply pipeline 133 is the passage, 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 value of the electronic flow meter 131 is compared with the flow value preset by the control system, and the metering pump a11 is controlled to adjust the flow in real time accordingly, and the control system 3 controls the injection time to control the single injection flow rate; achieving high-precision quantitative injection flow rate.

[0037] Step b2: Two groups of spray assemblies 14 are provided on one main liquid supply pipeline 1, respectively for controlling the spraying of defoaming agent at symmetrical positions on both sides of the same cross section of the furnace. The two groups of spray assemblies 14 spray alternately, so that the same amount of defoaming agent is sprayed at the same cross section of the furnace, thereby achieving high-precision quantitative spraying. Step b3: multiple groups of main liquid supply pipelines 1 correspond to different cross-sectional positions of the furnace or correspond to different furnaces, and differentially spray defoaming agents according to different positions to achieve high-precision defoaming and avoid waste of defoaming agents; It should be noted that the foam floating in the furnace gradually decreases as the furnace moves backward. Therefore, the amount of defoamer used also gradually decreases. The injection components 14 of the defoamer at different positions are different, so the amount of defoamer used can be accurately controlled to avoid waste. At the same time, at the same cross-sectional position, two groups of left and right injection components are used for alternating injection, which increases the reaction time between the defoamer and the foam, avoids the continuous injection and accumulation of a large amount of defoamer, reduces the amount of defoamer used, and improves the defoaming quality.

[0038] It is further explained that the defoaming agent in the present application is preferably a nano-scale defoaming agent, such as a commercially available nano-scale defoaming agent. Any solvent that can defoam and degas the glass during the melting process is applicable to the defoaming process of the present application.

[0039] As an improvement, before the normal injection step of the defoamer in the main liquid supply pipeline, step a, initial injection flow calibration step is also included, and the initial injection flow calibration includes: Step a1: set a certain flow value through the control system 3, so that only the defoaming agent passes through the mechanical flow meter 132 and is sprayed normally. The value of the mechanical flow meter is compared with the system set value. If the difference is within a certain range, the accuracy of the mechanical flow meter 132 meets the process requirements; Specifically, close the valves on both sides of the electronic flowmeter 131, open the valves on both sides of the mechanical flowmeter 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 flowmeter is compared with the system setting value. If the difference is within a certain range, the process requirements are met; specifically, when the difference range is less than 5%, it is determined that the corresponding flowmeter meets the process requirements.

[0040] Preferably, the initial injection flow calibration further comprises: Step a2: a certain flow rate is set by the control system 3 so that only the defoaming agent passes through the electronic flow meter 131 and is sprayed normally. The value of the electronic flow meter 131 is compared 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. Specifically, close the valves on both sides of the mechanical flowmeter 132, open the valves on both sides of the electronic flowmeter 131, set a certain flow value through the control system 3, turn on the metering pump a11, and 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 electronic flowmeter 131 is compared with the system set value. If the difference is within a certain range, the process requirements are met; specifically, when the difference range is less than 5%, it is determined that the corresponding flowmeter meets the process requirements.

[0041] Furthermore, if the flow rate values set in step a1 and step a2 are the same, the flow rate values measured are compared. If the difference between the flow rate values measured in step a1 and step a2 falls within a certain range, the electronic flowmeter and the mechanical flowmeter are determined to be operating normally, thereby achieving mutual calibration between the mechanical and electronic flowmeters. It should be noted that if the difference between the electronic and mechanical flowmeters is within 2%, both the mechanical and electronic flowmeters are determined to be operating normally.

[0042] At the same time, in step a1 or step a2, the on-site operator determines whether the injection flow meets the requirements based on the injection effect, and adapts the injection flow based on the result. After the debugging is completed, the flow value is fed back to the control system 3 as the flow process setting value of the main liquid supply pipeline 1.

[0043] Preferably, a flow stabilizing device 6 is provided at the front or rear end of the metering assembly 13 to ensure that the defoaming agent is supplied at a rated flow rate. Specifically, the flow stabilizing device 6 ensures that the liquid is always output at a certain pressure to prevent insufficient pressure from causing the solvent to be unable to fill the pipeline, thereby affecting the flow rate in the pipeline and affecting the defoaming quality.

[0044] In this embodiment, the step c is also included, wherein the auxiliary liquid supply pipeline is used for auxiliary injection: 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 pipeline 2 and the abnormal main liquid supply pipeline 1, and the defoamer in the auxiliary liquid supply pipeline 2 flows into the main liquid supply pipeline 1 to continue supplying the defoamer.

[0045] Furthermore, the step c, auxiliary injection of the auxiliary liquid supply pipeline, further comprises: step c2, during the normal liquid supply process, inspecting and repairing the metering pump or the filter buffer tank without affecting normal production.

[0046] This embodiment also includes step d, abnormal repair of electronic components: 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 a12 passes through the mechanical flow meter and the auxiliary injection pipeline 144 to reach the defoaming gun 142 and be sprayed out.

[0047] It should be noted that when electronic components malfunction and require maintenance, the electrical box must be shut down for repair. Under normal operating conditions, after a power outage, the electronic components cannot function properly, resulting in a failure to properly supply liquid and prevent the defoamer from being properly sprayed, seriously affecting kiln production. This embodiment opens the valves on both sides of the mechanical flowmeter 132, closes the valves on both sides of the electronic flowmeter 131, closes the manual valve on the main injection pipeline 145, and opens the manual valve on the auxiliary injection pipeline 144. At this time, the defoamer in the filter buffer tank a12 passes through the mechanical flowmeter and the auxiliary injection pipeline 144 to the defoamer gun 142 and is sprayed out, unaffected by the power outage, ensuring normal furnace production. This solves the technical problem of the prior art in which normal liquid supply cannot be achieved after a power outage.

[0048] In addition, after an abnormal power outage, the time for liquid supply can be adapted according to the volume of the filter buffer tank a12, so that normal liquid supply can be guaranteed within a certain period of time, when the pressure in the filter buffer tank a12 is insufficient to provide liquid.

[0049] Example 2 like Figure 1-Figure 5 As shown, this embodiment provides a defoaming agent pump supply system for glass melting, which is used to implement a defoaming process for glass melting described in Example 1. The pump supply system includes a cabinet 5, at least one set of main liquid supply pipelines 1, auxiliary liquid supply pipelines 2, and a control system 3. The inlet end of the main liquid supply pipeline 1 is connected to the defoaming agent supply pipe 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 for atomization spraying, which is a prior art and the detailed structure is not repeated here. One end of the auxiliary liquid supply line 2 is connected to the defoamer liquid supply pipe 4, and the other end is connected to the main liquid supply line 1. The control system 3 can be controlled by PLC, which is an existing technical means and the detailed principle is not repeated in this application.

[0050] It should be noted that the main liquid supply pipeline 1 is provided with at least one group. In this embodiment, two groups are preferably provided for spraying defoaming agents to different kilns.

[0051] As an improvement, the main liquid supply line 1 includes: a metering pump a11, a filter buffer tank a12, a metering assembly 13 for precisely controlling liquid flow, and multiple parallel injection assemblies 14. The metering pump a11 is electrically connected to a control system 3, which sends signals to control the operation of the metering pump.

[0052] Preferably, the filtering buffer tank a12 is provided with a pressure gauge a121 for detecting the pressure inside the tank.

[0053] It should be noted that the injection components 14 arranged in parallel can realize the precise control of one group of injection components 14 to precisely and quantitatively inject the defoaming agent one by one. At the same time, multiple groups of injection components 14 spray in sequence to realize periodic cyclic injection at different positions, thereby realizing high-precision quantitative injection of the defoaming agent.

[0054] Specifically, the glass furnace is composed of multiple groups of small furnaces connected in series. One group of small furnaces is provided with a group of liquid supply pipelines. Two injection assemblies 14 are provided on both sides of the group of small furnaces for periodically injecting defoaming agent into the furnace.

[0055] The metering pump a11 can be any structure that can achieve quantitative metering transmission, such as an electronically controlled metering diaphragm pump, a plunger pump, a gear pump, a screw pump, etc.; in this embodiment, an electronically controlled metering diaphragm pump is preferably used.

[0056] Preferably, the main liquid supply pipeline 1, the auxiliary liquid supply pipeline 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.

[0057] Example 3 like Figure 1-Figure 5As shown, the components identical or corresponding to those in the second embodiment are marked with the same reference numerals as those in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The differences between the third embodiment and the second embodiment are: In this embodiment, the metering component 13 is provided between the filtering buffer tank a12 and the injection component 14; The metering assembly 13 includes a normal liquid supply pipeline 133 and a calibration pipeline 134 connected in parallel. The normal liquid supply pipeline 133 is provided with an electronic flow meter 131, and two valves are provided at both ends of the electronic flow meter 131; A mechanical flow meter 132 and valves located at both ends of the mechanical flow meter 132 are provided on the calibration pipeline 134; the mechanical flow meter 132 may optionally be a rotor flow meter.

[0058] In this embodiment, the mechanical flow meter 132 may be a rotor flow meter to achieve manual adjustment and control of the flow.

[0059] The electronic flow meter 131 can be a digital flow meter, and the flow rate of the digital flow meter can be controlled by the control system 3.

[0060] It should be noted that during the debugging process, the electronic flowmeter 131 is turned off and the mechanical flowmeter 132 is turned on. After testing the solution flow data required for a single injection of the defoamer through the flow control of the mechanical flowmeter 132, the data is fed back to the PLC control system 3 to achieve the normal working flow value of the main liquid supply pipeline 1. During normal operation, the mechanical flowmeter 132 is turned off and the electronic flowmeter 131 is turned on. The electronic flowmeter 131 detects the flow of the injection process in real time according to the required flow value recorded by the PLC control system 3 and feeds back to the control system. The control system automatically controls the injection time, thereby achieving high-precision defoamer injection.

[0061] Example 4 like Figure 1-Figure 5 As shown, the components identical or corresponding to those in the second embodiment are designated by the corresponding reference numerals in the second embodiment. For simplicity, only the differences from the second embodiment are described below. The fourth embodiment differs from the second embodiment in that: In this embodiment, the filtering buffer tank a12 is further provided with a pressure relief component a122 for ensuring that the filtering buffer tank a12 is at a rated pressure. The pressure relief component a122 prevents the filtering buffer tank a12 from having a safety hazard due to excessive pressure.

[0062] Preferably, the filter buffer tank a12 ensures that the defoaming agent is output at the rated pressure sufficiently and stably, thereby improving the consistency of the defoaming agent sprayed by the defoaming gun 142 per unit time, thereby improving the accuracy of the amount of defoaming agent added.

[0063] Furthermore, the pressure relief component a122 includes a manual pressure relief valve 1221 and an electromagnetic pressure relief valve 1222. Pressure relief can be achieved through manual periodic operation, or automatic pressure relief can be achieved through the electromagnetic pressure relief valve 1222. That is, when the pressure in the tank exceeds the set pressure of the electromagnetic pressure relief valve 1222, the electromagnetic pressure relief valve 1222 automatically opens to achieve pressure relief, thereby ensuring that the pressure in the filter buffer tank a12 remains constant.

[0064] Preferably, a detection element for detecting the inlet pressure and outlet pressure of the filter buffer tank a12 is also included.

[0065] It should be noted that the detection element can be any device that can detect pressure, such as a pressure sensor or a pressure gauge. 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 clogged, 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.

[0066] Example 5 like Figure 1-Figure 5 As shown, the components identical or corresponding to those in the second embodiment are marked with the same reference numerals as those in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The differences between the fifth embodiment and the second embodiment are: In this embodiment, the spray assembly 14 includes: a main spray pipeline 145, an auxiliary spray pipeline 144 and a defoaming gun 142 for spraying a defoaming agent.

[0067] Preferably, the main injection pipeline 145 is provided with a solenoid valve a141 and manual valves provided on both sides of the solenoid valve a141; the auxiliary injection pipeline 144 is provided with a manual valve.

[0068] It should be noted that the solenoid valve a141 automatically controls the on and off of the defoaming gun 142 to achieve quantitative and timed injection.

[0069] Furthermore, when electronic components malfunction and require repair, the electrical box must be shut down for maintenance. Under normal operating conditions, normal liquid supply cannot be maintained after a power outage, resulting in failure to properly spray the defoaming agent, seriously impacting kiln production. This embodiment opens the valves on both sides of the mechanical flowmeter 132, closes the valves on both sides of the electronic flowmeter 131, closes the manual valve on the main injection pipeline 145, and opens 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 the auxiliary injection pipeline 144 to the defoaming gun 142 and is sprayed out, unaffected by the power outage and ensuring normal furnace production. This solves the technical problem of the prior art in which normal liquid supply cannot be achieved after a power outage.

[0070] In addition, after an abnormal power outage, the time for liquid supply can be adapted according to the volume of the filter buffer tank a12, so that normal liquid supply can be guaranteed within a certain period of time. When the pressure in the filter buffer tank a12 is not enough to provide Preferably, a pressure gauge B143 is further provided at the front end of the injection assembly 14 for detecting the liquid supply pressure within the main liquid supply pipeline 1. The pressure gauge B143 is electrically connected to the control system 3 and feeds the detection result back to the control system 3. When the value of the pressure gauge B143 exceeds the rated value of 0.4 MPa, an alarm is triggered. When it exceeds the rated value of 0.5 MPa, the electronically controlled metering diaphragm pump is shut down, thereby preventing excessive pipeline pressure from affecting pipeline safety. Of course, the specific value exceeding the rated value can be adaptively adjusted according to different operating conditions or conditions.

[0071] Example 6 like Figure 1-Figure 5 As shown, the components identical or corresponding to those in the second embodiment are marked with the same reference numerals as those in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The difference between the sixth embodiment and the second embodiment is that: 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, and the filter buffer tank b22 is connected to a pressure relief component b23; 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.

[0072] Furthermore, when multiple groups of main liquid supply pipelines 1 are provided, the auxiliary liquid supply pipelines 2 are connected to the multiple groups of main liquid supply pipelines 1.

[0073] It should be noted that when the metering pump b21 and the filter buffer tank b22 of the main liquid supply pipeline 1 need maintenance or fail, the valve at the rear end of the filter buffer tank b22 of the main liquid supply pipeline 1 is disconnected, and the valve between the auxiliary liquid supply pipeline 2 and the main liquid supply pipeline 1 is opened to implement maintenance and overhaul operations without stopping production, so as to avoid the production line shutdown affecting normal production. In particular, for glass manufacturers, the kilns are in uninterrupted production, and once production is stopped, it will have a huge impact on normal production.

[0074] The rear end of the auxiliary liquid supply pipeline 2 of the present application shares the same metering component 13 with the rear end of the main liquid supply pipeline 1, so that the replacement process does not require adjusting the parameters of the metering component 13, thereby achieving uninterrupted replacement. When a sudden fault occurs, it can be adjusted and replaced immediately.

[0075] At the same time, the valve between the auxiliary liquid supply pipeline 2 and the main liquid supply pipeline 1 can be set as a solenoid valve b24 to achieve remote control and automatic switching, avoiding sudden failures that the operator may not discover in time and affect normal production.

[0076] Example 7 like Figure 6 As shown, the components identical or corresponding to those in the second embodiment are designated by the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The differences between the seventh embodiment and the second embodiment are: In this embodiment, a defoamer pump supply system for glass melting also includes a flow stabilizing device 6 for outputting the defoamer at a stable flow rate. The flow stabilizing device 6 is preferably a back pressure valve, which enables the defoamer in the pipeline to be output at a certain pressure, thereby ensuring a constant output flow rate.

[0077] The flow stabilizing device 6 is disposed at the rear end of the metering component 13 .

[0078] The metering assembly 13 includes a normal liquid supply pipeline 133 and a calibration pipeline 134 connected in parallel, and two valves are provided at both ends of the normal liquid supply pipeline 133; A mechanical flow meter 132 and valves located at both ends of the mechanical flow meter 132 are provided on the calibration pipeline 134; the mechanical flow meter 132 may optionally be a rotor flow meter.

[0079] It should be noted that during the debugging process, the valves on both sides of the normal liquid supply pipeline 133 are closed, and the valves on both sides of the mechanical flowmeter 132 are opened. After the flow control of the mechanical flowmeter 132 is used to test the solution flow data required for a single injection of the defoaming agent, the data is fed back to the PLC control system 3. The control system 3 controls the flow of the metering pump a11 according to the flow value, such as the diaphragm pump controls the opening of the diaphragm pump to achieve the normal working flow value of the main liquid supply pipeline 1. During normal operation, the valves on both sides of the mechanical flowmeter 132 are closed, and the valves on both sides of the normal liquid supply pipeline 133 are opened to ensure that the liquid is continuously supplied along the normal liquid supply pipeline 133. The flow stabilizing device 6 supplies the defoaming agent at a constant flow rate to ensure the accuracy of the defoaming agent injection amount.

[0080] In addition, this embodiment does not require the installation of an electronic flow meter. After the initial flow 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 of insufficient flow caused by the pressure in the buffer tank being unable to meet the pressure at the rated flow output when the volume in the buffer tank is very small during the initial supply process.

[0081] Example 8 like Figure 7 As shown, the components identical or corresponding to those in the second embodiment are designated by the corresponding reference numerals in the second embodiment. For the sake of simplicity, only the differences from the second embodiment are described below. The differences between the eighth embodiment and the second embodiment are: In this embodiment, a defoamer pump supply system for glass melting further includes a flow stabilizing device 6 for outputting at a stable flow rate. The flow stabilizing device 6 is preferably a back pressure valve, which enables the defoamer in the pipeline to be output at a certain pressure, thereby ensuring a constant output flow rate.

[0082] The flow stabilizing device 6 is disposed at the front end of the metering component 13 .

[0083] The output end of the auxiliary liquid supply pipeline 2 is arranged at the front end of the flow stabilizing device 6 .

[0084] In this embodiment, the metering component 13 is provided 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.

[0085] In this embodiment, the mechanical flow meter 132 may be a rotor flow meter to achieve manual adjustment and control of the flow.

[0086] The electronic flow meter 131 can be a digital flow meter, and the flow rate of the digital flow meter can be controlled by the control system 3.

[0087] It should be noted that during the debugging process, the electronic flowmeter 131 is turned off and the mechanical flowmeter 132 is turned on. After testing the solution flow data required for a single injection of the defoamer through the flow control of the mechanical flowmeter 132, the data is fed back to the PLC control system 3 to achieve the normal working flow value of the main liquid supply pipeline 1. During normal operation, the mechanical flowmeter 132 is turned off and the electronic flowmeter 131 is turned on. The electronic flowmeter 131 detects the flow of the injection process in real time according to the required flow value recorded by the PLC control system 3 and feeds back to the control system. The control system automatically controls the injection time, thereby achieving high-precision defoamer injection.

[0088] In addition, by setting up a flow stabilizing device 6, the liquid flow through the electronic flow meter is always kept constant, avoiding unstable flow that causes the electronic flow meter detection result to be inconsistent with the preset flow value, so that the feedback control system frequently adjusts the output flow of the metering pump a11, affecting the stability of the system.

[0089] In addition, the flow stabilizing device 6 can realize a highly stable and high-precision supply of the defoaming agent, thereby improving the defoaming quality of the glass melting process.

[0090] 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 in the scope of protection of the present invention.

Claims

1. A defoaming process for glass melting, characterized in that: include: Step b: Normal spraying of defoamer in the main liquid supply pipeline: Step b1, close the calibration pipeline (134), the normal liquid supply pipeline (133) is opened, the metering pump a (11) is opened, the solenoid valve a (141) of the injection assembly (14) is opened, the defoaming agent is sprayed 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 injection flow rate; Step b2: a group of main liquid supply pipelines (1) are provided with two groups of spray assemblies (14) for respectively controlling the spraying of defoaming agent at symmetrical positions on both sides of the same cross section of the furnace, and the two groups of spray assemblies (14) spray alternately; Step b3: multiple groups of main liquid supply pipelines (1) correspond to different cross-sectional positions of the furnace or correspond to different furnaces.

2. A defoaming process for glass melting according to claim 1, characterized in that: Before the normal injection step of the defoamer in the main liquid supply pipeline, the method further includes step a, an initial injection flow calibration step, wherein the initial injection flow calibration step includes: Step a1, setting a certain flow value through the control system (3), allowing only the defoaming agent to pass through the mechanical flow meter (132) and be sprayed normally, comparing the value of the mechanical flow meter with the system set value, and if the difference is within a certain range, the accuracy of the mechanical flow meter (132) meets the process requirements; Step a2: a certain flow rate value is set by the control system (3), so that only the defoaming agent passes through the electronic flow meter (131) and is sprayed normally. The value of the electronic flow meter (131) is compared 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.

3. A defoaming process for glass melting according to claim 2, characterized in that: When the flow values set in step a1 and step a2 are the same, the flow values detected respectively are compared. If the difference between the flow values measured in step a1 and step a2 meets a certain range, it is determined that the electronic flowmeter and the mechanical flowmeter are working properly.

4. A defoaming process for glass melting according to any one of claims 1 to 3, characterized in that: A flow stabilizing device (5) is provided at the front end or the rear end of the metering component (13) so that the defoaming agent is supplied at a rated flow rate.

5. A defoaming process for glass melting according to claim 1, characterized in that: The invention also includes step c, auxiliary injection of auxiliary liquid supply pipeline: Step c1: close the valve at the rear 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), and the defoamer continues to be supplied.

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

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

8. A defoamer pump supply system for glass melting, used to implement the defoaming process for glass melting according to any one of claims 1 to 7, characterized in that: It comprises at least one set of main liquid supply pipelines (1), auxiliary liquid supply pipelines (2) and a control system (3), wherein the inlet end of the main liquid supply pipeline (1) is connected to the liquid supply pipe (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 pipe (4) of the defoaming agent, and the other end is connected to the main liquid supply pipeline (1); The main liquid supply pipeline (1) comprises: a metering pump a (11), a filter buffer tank a (12), a metering component (13) for accurately controlling the liquid flow rate, and a plurality of injection components (14) arranged in parallel, which are connected in sequence; The metering assembly (13) is provided between the filter buffer tank a (12) and the injection assembly (14); the metering assembly (13) comprises an electronic flow meter (131) and a mechanical flow meter (132) connected in parallel; The system further comprises a flow stabilizing device (5) provided at the front end or the rear end of the metering component (13).

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

10. A defoamer pump supply system for glass melting according to claim 8, 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), and the auxiliary liquid supply pipeline (2) comprises: a metering pump b (21) and a filter buffer tank b (22) connected in sequence, and 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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