A large lead-out quantity high generation glass substrate kiln heating and baking system and method

Abstract

The application discloses a large-extraction high-generation glass substrate kiln heating and baking system and method, and belongs to the technical field of glass kiln heating and baking. The kiln heating and baking system comprises a kiln, heating electrodes and pure oxygen combustion guns arranged on the two sides of the kiln; a feeding port and an exhaust port are arranged at the front end of the kiln, the feeding port is connected with a hot air generating device, the hot air generating device is connected with a gas supply device and an air supply device; a flue gas mixing device is installed on the exhaust port, the flue gas mixing device is connected with a flue gas treatment device and a flue gas mixing cooling air supply device respectively; an observation port is arranged at the rear end of the kiln, the observation port is connected with a uniform flow pressure stabilizing device, the uniform flow pressure stabilizing device is connected with a jet cooling device and a uniform flow pressure stabilizing automatic regulating valve, and the uniform flow pressure stabilizing automatic regulating valve is connected with a roof exhaust device. The system can solve the problems of insufficient shooting range of the hot air gun of the kiln, poor uniformity of hot air flow, high and unstable furnace pressure, insufficient exhaust system capacity, high energy consumption and uneven heating of refractory materials.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of glass kiln heating and baking, and particularly relates to a large-output high-generation glass substrate kiln heating and baking system and method. BACKGROUND

[0002] The glass kiln is the core equipment of the melting process in the glass production industry, and is connected with the feeding equipment in front and the channel and forming equipment in back. The glass kiln mainly melts the uniform and good mixture provided by the feeding process, and makes the molten glass liquid quality meet the relevant requirements through uniform and clarification processes, and supplies the channel to the forming equipment. As a thermal equipment under high temperature operation, the reasonable structure, excellent masonry quality and successful heating and baking of the glass kiln have great significance for prolonging the service life of the kiln and improving the yield and quality of the glass product.

[0003] The heating and baking system and method are the key to the success of heating and baking. A rationally designed heating and baking system and method of the kiln is not only beneficial to the realization of the heating process target, the safe operation of the related equipment and the energy saving of the system, but also plays an important role in the stability of the whole kiln period production and the prolongation of the service life of the kiln. After the masonry of the glass kiln is completed, the refractory material used in the structure of the kiln must be subjected to an organized and controllable heating and baking process, so that the temperature of the refractory material gradually rises to the target value according to the predetermined process plan, and the heating and expansion of the refractory material of the kiln reaches the adjustable and controllable target, and the whole kiln can be put into operation for glass production with raw materials. The heating and baking is a very important link before the production of the whole production line. The role of the heating and baking system is to ensure that the hot air flow of the kiln is uniform, the refractory material is uniformly heated, the temperature is controllable, the furnace pressure is stable, the baking equipment and the exhaust system are safe and reliable in operation, and the improper design and use of the system may lead to the cracking and damage of the refractory material of the kiln, the difficulty in stable control of the furnace pressure, the poor reliability of the safe operation of the exhaust system and the large energy consumption. Therefore, the design of the heating and baking system and method must be considered from the design stage, and the problems such as the uniformity of the hot air flow in the kiln, the uniform heating of the refractory material, the controllability of the temperature, the stability of the furnace pressure, the safe and reliable operation of the baking equipment and the exhaust system must be solved.

[0004] The existing G8.5 or below low-generation kiln hot air device cannot meet the narrow and long structural space of the large-output high-generation kiln; the kiln exhaust port and the hot air device nozzle are arranged on the same section, which leads to insufficient mixing, poor uniformity and stability of the hot air flow in the kiln, uneven heating of the refractory material, easy cracking and easy damage; the operation frequency of the exhaust system is too high, which cannot meet the stable control requirement of the furnace pressure in the heating and baking process, leading to high and unstable furnace pressure, poor operation safety of the exhaust system, large investment cost and power consumption, etc., which finally causes great damage to the kiln itself and its auxiliary equipment, and affects the service life of the kiln, the production process stability and the quality of the glass liquid. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the purpose of the present application is to provide a large-drawing high-generation glass substrate kiln heating and baking system and method, which solves the problems of insufficient range of hot air gun, poor uniformity of hot air flow, high and unstable furnace pressure, insufficient exhaust system capacity, high energy consumption, and uneven heating of refractory materials of low-generation kiln below G8.5.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] The present application discloses a large-drawing high-generation glass substrate kiln heating and baking system, which comprises a kiln, a hot air generating device connected to a feeding port at the front end of the kiln, a gas supply device and an air supply device connected to the hot air generating device; a smoke exhaust port is arranged at the upper end of the feeding port, a smoke mixing device is connected to the smoke exhaust port, the smoke mixing device is respectively connected to a smoke treatment device and a smoke mixing cooling air supply device, and the smoke treatment device is connected to an outdoor chimney; an observation port is arranged at the rear end of the kiln, and a uniform flow pressure stabilizing device is connected to the observation port, the uniform flow pressure stabilizing device is respectively connected to a jet cooling device and a roof exhaust device.

[0008] Preferably, the gas supply device comprises two gas supply branches, the inlet end of each gas supply branch is connected to a gas source, and the outlet end is connected to the hot air generating device; the inlet end to the outlet end of each gas supply branch is sequentially connected to a gas automatic regulating device inlet valve, a pre-pressure regulating pressure gauge, a gas pressure sensor, an automatic regulating valve, a gas flow meter, a gas automatic regulating device, a post-pressure regulating pressure gauge and a gas automatic regulating device outlet valve; the inlet ends of the two gas supply branches are both connected to a gas inlet bypass valve, and the outlet ends of the two gas supply branches are both connected to a gas outlet bypass valve.

[0009] Further preferably, a left-right gas automatic regulating device bypass is further connected in parallel between the two gas supply branches, the inlet end of the left-right gas automatic regulating device bypass is connected to the gas inlet bypass valve, and the outlet end is connected to the gas outlet bypass valve; the inlet end to the outlet end of the left-right gas automatic regulating device bypass is sequentially connected to a gas bypass inlet valve, a pre-pressure regulating pressure gauge, a gas pressure sensor, an automatic regulating valve, a gas flow meter, a left-right gas automatic regulating device, a post-pressure regulating pressure gauge and a gas bypass outlet valve.

[0010] Further preferably, a gas filter is further arranged between the pre-pressure regulating pressure gauge and the gas pressure sensor.

[0011] Further preferably, the gas supply control pressure range of the gas automatic regulating device and the left-right gas automatic regulating device is 0.02-0.04 MPa.

[0012] Preferably, the flue gas mixing and cooling air supply device comprises, in sequence, a butterfly valve for the air inlet of the air mixing device, a flow meter for the air mixing device and an air conveying device for the air mixing device.

[0013] Further preferably, the air conveying device for the air mixing device is further provided with an air filter for the air mixing device.

[0014] Preferably, the air conveying device for the air mixing device is further provided with a standby air conveying device for the air mixing device in parallel.

[0015] Preferably, the air supply device is provided, in sequence from the inlet end to the outlet end, with a low-temperature air conveying device, a front butterfly valve, a low-temperature air flow meter and a rear butterfly valve.

[0016] Further preferably, the low-temperature air conveying device is further provided with a low-temperature air filter for the hot air generating device.

[0017] Preferably, the hot air generating device comprises a left hot air generating device and a right hot air generating device.

[0018] Preferably, an automatic regulating valve for flow stabilization is provided between the flow stabilization device and the roof exhaust device.

[0019] Preferably, the flue gas mixing device is insulated from the flue gas treatment device and the flue gas mixing and cooling air supply device.

[0020] Preferably, the hot air generating device and the flue gas mixing device are made of SUS310 material which is resistant to high temperature.

[0021] The application further discloses a method for heating and baking a large-drawing high-generation glass substrate furnace, and the steps are as follows.

[0022] 1) Assemble and debug the large-drawing high-generation glass substrate furnace heating and baking system.

[0023] 2) Adjust the air supply device according to the target air flow and proportion, adjust the gas supply device according to the target gas flow and proportion, and ignite the hot air generating device at the same time, so that the gas and air are mixed and burned according to the target proportion;

[0024] 3) When the furnace pressure reaches 20~30 Pa, adjust the opening degree of the automatic regulating valve for flow stabilization, and when the opening degree is 50% and the furnace pressure reaches 35 Pa, open the flue gas treatment device (12) to control the furnace pressure at 35 Pa±5 Pa, and open the roof exhaust device (6) to exhaust the hot air flow discharged by the flow stabilization device;

[0025] 4) When the temperature of the furnace space reaches 250~350℃, open the flue gas mixing and cooling air supply device (13) to cool the flue gas mixing device (8), and ensure that the temperature of the flue gas in the flue gas mixing device (8) is not higher than 500℃ during the whole heating process.

[0026] 5) According to the target rate, the kiln is heated, when the kiln temperature rises to 800~850℃, the pure oxygen combustion gun is switched to the urgent heating, and the gas supply device (11) and the air supply device (44) are gradually closed;

[0027] 6) When the gun switching is completed, the gas valve of the hot air generating device is closed, then the hot air generating device is removed, the feeding port is blocked, finally the flow stabilizing device is removed and the observation port is blocked, the heating and baking process is completed.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] The glass substrate kiln heating and baking system provided by the present application is provided with a hot air generating device at the front end of the kiln, which can provide the internal space of the kiln with hot air with controllable temperature, so as to ensure that the temperature of the refractory material of the kiln gradually rises to the target value along the heating process; the gas supply device is used for conveying natural gas filtered on site of the kiln to the hot air generating device, and adjusting the gas temperature of the hot air generating device; the air supply device is used for conveying cold and hot mixed air on site of the kiln to the hot air generating device. The gas supply device and the air supply device can cooperate with the hot air generating device to accurately adjust the flow and component ratio of the combustible gas delivered to the kiln by adjusting the opening degree of the valve, and then accurately control the temperature inside the kiln. Compared with the current exhaust port setting at the front end of the kiln, the system is also provided with a flow stabilizing device at the rear end of the kiln. The flow stabilizing device is connected with the roof exhaust device, can discharge the high-temperature flue gas discharged from the flow stabilizing device to the outdoor atmosphere, and can provide the gas inside the kiln with diffusion power to assist the gas flow to the rear end of the kiln, so as to ensure that the hot air flow in the kiln is fully mixed, and then ensure that the refractory material is evenly heated. The flow stabilizing device can ensure the stability of the pressure inside the kiln, so as to ensure the stability of the furnace pressure and the safety of the exhaust system, and then reduce the cost problems caused by the investment cost and the power consumption. The jet cooling device is used for conveying ordinary high-pressure air to the flow stabilizing device, is responsible for cooling and exhaust flow control of itself and flue gas, and further ensures the stability of the furnace pressure. The system can realize sufficient, uniform and stable mixing of the hot air flow in the furnace, uniform heating of the refractory material without damage, stable control of the furnace pressure, energy saving, and safe and stable operation of the exhaust system; the glass substrate kiln heating and baking system is used for baking, which can solve the problems of insufficient hot air gun range, poor hot air flow uniformity, high and unstable furnace pressure, insufficient exhaust system capacity, large energy consumption, uneven heating of the refractory material, influence on the service life of the kiln and the quality of the subsequent production process glass liquid, and the like of the existing G8.5 or below low-generation 25-ton glass substrate kiln heating and baking system and method.

[0030] Further, the valve, flow meter and pressure sensor in the gas supply device can realize display and accurate adjustment of gas parameters.

[0031] Further, the emergency bypass in the gas supply device can ensure the supply of gas as a failure emergency bypass, thereby providing strong guarantee for the safety of the kiln device and production process, and further prolonging the service life of the kiln and stabilizing the quality of the glass liquid in the kiln.

[0032] Further, the flue gas mixing cooling air supply device can accurately control the temperature in the kiln through the flow meter and the adjusting valve.

[0033] Further, the standby cold air delivery device of the air mixing device can provide strong guarantee for cooling, and further ensure the safety of production. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 It is a whole schematic diagram of the large-output high-generation glass substrate kiln heating and baking system of the present application.

[0035] Fig. 2 It is a front-end schematic diagram of the large-output high-generation glass substrate kiln heating and baking system of the present application.

[0036] Fig. 3 It is a rear-end schematic diagram of the large-output high-generation glass substrate kiln heating and baking system of the present application.

[0037] In the drawing: 1 - kiln, 2 - heating electrode, 3 - left feeding port, 3' - right feeding port, 4 - exhaust port, 5 - left observation port, 5' - right observation port, 6 - roof exhaust device, 7 - left hot air generating device, 7' - right hot air generating device, 8 - flue gas mixing device, 9 - left flow stabilizing device, 9' - right flow stabilizing device, 10 - left jet cooling device, 10' - right jet cooling device, 11 - gas supply device, 12 - flue gas treatment device, 13 - flue gas mixing cooling air supply device, 14 - outdoor chimney, 15 - left flow stabilizing automatic regulating valve, 15' - right flow stabilizing automatic regulating valve, 16 - left jet cooling device regulating valve, 16' - right jet cooling device regulating valve, 17 - gas flow direction, 18 - left gas automatic regulating device, 18' - right gas automatic regulating device, 19 - left and right gas automatic regulating device, 20 - left gas automatic regulating device outlet valve, 20' - right gas automatic regulating device outlet valve, 21 - left pressure gauge after pressure regulation, 21' - right pressure gauge after pressure regulation, 22 - left gas flow meter, 22' - right gas flow meter, 23 - left automatic regulating valve, 23' - right automatic regulating valve, 24 - left gas pressure sensor, 24' - right gas pressure sensor, 25 - left gas filter, 25' - right gas filter, 26 - left pressure gauge before pressure regulation, 26' - right pressure gauge before pressure regulation, 27 - left gas automatic regulating device inlet valve, 27' - right gas automatic regulating device inlet valve, 28 - gas bypass outlet valve, 29 - gas bypass inlet valve, 30 - left gas path outlet bypass valve, 30' - right gas path outlet bypass valve, 31 - left gas path inlet bypass valve, 31' - right gas path inlet bypass valve, 32 - left low temperature air conveying device, 32' - right low temperature air conveying device, 33 - hot air device low temperature air filter, 34 - insulating flexible joint, 35 - left front butterfly valve, 35' - right front butterfly valve, 36 - left low temperature air flow meter, 36' - right low temperature air flow meter, 37 - left rear butterfly valve, 37' - right rear butterfly valve, 38 - air mixing device cold air conveying device, 38' - air mixing device standby cold air conveying device, 39 - insulating flexible joint, 40 - air mixing device flow meter, 41 - air mixing device air inlet butterfly valve, 42 - flue gas mixing device air filter, 43 - left gas path automatic regulating valve, 43' - right gas path automatic regulating valve, 44 - air supply device, left A, left B, left C, left D, left E, left F, left G, left H, left I, left J represent left 1-10 pure oxygen gas gun in order, right A, right B, right C, right D, right E, right F, right G, right H, right I, right J represent right 1-10 pure oxygen gas gun in order. DETAILED DESCRIPTION

[0038] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0040] The present application provides a large lead-out high-generation glass substrate kiln heating and baking system, referring to Figs. 1-3 , comprising a glass kiln 1, a plurality of heating electrodes 2 are symmetrically arranged on both sides of the glass kiln 1, the number of heating electrodes 2 is 8; the upper end of the heating electrode 2 is provided with a pure oxygen combustion gun, and the pure oxygen combustion gun is arranged in left A, left B, left C, left D, left E, left F, left G, left H, left I and left J positions (the setting mode of the right side is the same, which is right A, right B, right C, right D, right E, right F, right G, right H, right I and right J positions) in sequence.

[0041] The front end of the glass kiln 1 is provided with a left feeding port 3, a right feeding port 3' and an exhaust port 4, the left feeding port 3 is connected with a left hot air generating device 7, the right feeding port 3' is connected with a right hot air generating device 7', and the left hot air generating device 7 and the right hot air generating device 7' are both connected with a gas supply device 11 and an air supply device 44. The exhaust port 4 is arranged on the upper part of the left feeding port 3 and the right feeding port 3', a flue gas mixing device 8 is installed on the exhaust port 4, the flue gas mixing device 8 is connected with a flue gas treatment device 12 and a flue gas mixing cooling air supply device 13 respectively, and the flue gas treatment device 12 is connected with an outdoor chimney 14. The left hot air generating device 7, the right hot air generating device 7' and the flue gas mixing device 8 are all made of SUS310 material with high temperature resistance; the flue gas mixing device 8 is insulated from the flue gas treatment device 12 and the flue gas mixing cooling air supply device 13.

[0042] The gas supply device 11 is used to supply filtered, pressure-reduced and stabilized natural gas to the left hot air generating device 7 and the right hot air generating device 7'. The inlet end of the gas supply device 11 is connected to a gas source, and the outlet end is connected to the left hot air generating device 7 and the right hot air generating device 7'. Three gas supply branches are connected in parallel from the inlet end to the outlet end of the gas supply device 11, which are the right gas supply branch, the left and right gas automatic regulating device bypass and the left gas supply branch. The inlet end to the outlet end of the right gas supply branch is sequentially connected with the right gas automatic regulating device inlet valve 27', the right pre-regulating pressure gauge 26', the right gas filter 25', the right gas pressure sensor 24', the right automatic regulating valve 23', the right gas flow meter 22', the right gas automatic regulating device 18', the right post-regulating pressure gauge 21' and the right gas automatic regulating device outlet valve 20'. The inlet end to the outlet end of the left and right gas automatic regulating device bypass as a fault emergency bypass is sequentially connected with the gas bypass inlet valve 29, the pre-regulating pressure gauge, the gas filter, the gas pressure sensor, the automatic regulating valve, the gas flow meter, the left and right gas automatic regulating device 19, the post-regulating pressure gauge and the gas bypass outlet valve 28. The inlet end to the outlet end of the left gas supply branch is sequentially connected with the left gas automatic regulating device inlet valve 27, the left pre-regulating pressure gauge 26, the left gas filter 25, the left gas pressure sensor 24, the left automatic regulating valve 23, the left gas flow meter 22, the left gas automatic regulating device 18, the left post-regulating pressure gauge 21 and the left gas automatic regulating device outlet valve 20. The right gas supply branch is provided with the right inlet bypass valve 31' between the inlet end and the outlet end of the left and right gas automatic regulating device bypass, and the right outlet bypass valve 30' between the outlet end and the outlet end. The left gas supply branch is provided with the left inlet bypass valve 31 between the inlet end and the inlet end of the left and right gas automatic regulating device bypass, and the left outlet bypass valve 30 between the outlet end and the outlet end. The gas supply of the left gas automatic regulating device 18, the right gas automatic regulating device 18' and the left and right gas automatic regulating device 19 can be controlled within 0.02-0.04.

[0043] The flue gas mixing cooling air supply device 13 is used to supply the cold and hot mixed air filtered on site of the kiln 1 to the flue gas mixing device 8 and adjust the gas temperature of the flue gas mixing device 8. The inlet end of the flue gas mixing cooling air supply device 13 is connected to the cold and hot mixed air filtered, and the outlet end is connected to the flue gas mixing device 8. The inlet end and the outlet end of the flue gas mixing cooling air supply device 13 are sequentially provided with the air mixing device cold air supply device 38, the air mixing device flow meter 40 and the air mixing device air inlet butterfly valve 41. The air mixing device cold air supply device 38 is connected in parallel with the air mixing device standby cold air supply device 38', which is used when failure or maintenance occurs to ensure uninterrupted air supply. The air mixing device cold air supply device 38 and the air mixing device standby cold air supply device 38' are connected to the air mixing device flow meter 40 through the insulated flexible joint 39, and the air mixing device cold air supply device 38 and the air mixing device standby cold air supply device 38' are both provided with the flue gas mixing device air filter 42.

[0044] The air supply device 44 is used to supply the cold and hot mixed air on site of the kiln 1 to the hot air generating device. The inlet end of the air supply device 44 is connected to the air source, and the outlet end is connected to the left hot air generating device 7 and the right hot air generating device 7'. The air supply device 44 includes a left air supply branch and a right air supply branch. The left air supply branch is sequentially provided with the hot air device low-temperature air filter 33, the left low-temperature air supply device 32, the insulated flexible joint 34, the left front butterfly valve 35, the left low-temperature air flow meter 36 and the left rear butterfly valve 37 from the air source to the left hot air generating device 7. The right air supply branch is sequentially provided with the hot air device low-temperature air filter 33, the right low-temperature air supply device 32', the insulated flexible joint 34, the right front butterfly valve 35', the right low-temperature air flow meter 36', the right rear butterfly valve 37' from the air source to the right hot air generating device 7'.

[0045] The air mixing device cold air supply device 38, the air mixing device standby cold air supply device 38', the left low-temperature air supply device 32, the right low-temperature air supply device 32' and the flue gas treatment device 12 are all automatically frequency-controlled by the variable frequency fan check.

[0046] The rear end of the glass kiln 1 is provided with the left observation port 5 and the right observation port 5'. The left observation port 5 is connected to the left flow stabilizing device 9, and the left flow stabilizing device 9 is connected to the left jet cooling device 10 and the left flow stabilizing automatic regulating valve 15. The right observation port 5' is connected to the right flow stabilizing device 9', and the right flow stabilizing device 9' is connected to the right jet cooling device 10' and the right flow stabilizing automatic regulating valve 15'. The left flow stabilizing automatic regulating valve 15 and the right flow stabilizing automatic regulating valve 15' are both connected to the roof exhaust device 6.

[0047] The left jet cooling device 10 and the right jet cooling device 10' are used to deliver ordinary high-pressure air for the flow stabilizing device (the left flow stabilizing device 9 and the right flow stabilizing device 9'), and are responsible for cooling and exhaust flow control of the left jet cooling device 10 and the right jet cooling device 10' and the flue gas thereof. The inlet air pressure of the left jet cooling device 10 and the right jet cooling device 10' is controlled at 0.2-0.4 MPa, and the temperature of the left flow stabilizing device 9 and the right flow stabilizing device 9' is controlled within 500 DEG C by adjusting the inlet air flow. The left flow stabilizing device 9 and the right flow stabilizing device 9' are used together with the flue gas treatment device 12 to adjust the furnace pressure of the kiln 1.

[0048] The left flow stabilizing automatic regulating valve 15 and the right flow stabilizing automatic regulating valve 15' are mainly used for fine adjustment and control of the kiln pressure and adjustment of the uniformity of the hot air flow in the kiln. During the temperature rising and kiln baking, the left flow stabilizing automatic regulating valve 15 and the right flow stabilizing automatic regulating valve 15' are used together to fine adjust and control the kiln pressure of the kiln 1, adjust the uniformity of the hot air flow in the kiln 1 and reduce the load of the exhaust fan, and the discharged hot air flow is discharged into the outdoor atmosphere through the roof exhaust device 6.

[0049] The system is suitable for temperature rising and kiln baking of the high-generation electric melting and pure oxygen combustion kiln with large extraction of 8 pairs of heating electrodes 2 or more, and the air quantity and the natural gas quantity required by the hot air generating device can be automatically set and adjusted in the background.

[0050] The above-mentioned large extraction high-generation glass substrate kiln temperature rising and kiln baking method provided by the present application has the following specific steps:

[0051] Step 1, assembly

[0052] 1) Assemble the gas supply device 11. Assemble the left gas automatic regulating device 18, the right gas automatic regulating device 18' and the left and right gas automatic regulating device bypass in the gas supply device 11 together, and the assembly sequence of each branch is in turn gas automatic regulating device inlet valve, pre-pressure regulating pressure gauge, gas filter, gas pressure sensor, automatic regulating valve, gas flow meter, post-pressure regulating pressure gauge and gas automatic regulating device outlet valve.

[0053] 2) Assemble the air supply device 44. Assemble the hot air device low-temperature air filter 33, the left low-temperature air conveying device 32, the insulating flexible connection 34, the left front butterfly valve 35, the left low-temperature air flow meter 36 and the left rear butterfly valve 37 in the air supply device 44 in turn; and then assemble the hot air device low-temperature air filter 33', the right low-temperature air conveying device 32', the insulating flexible connection 34, the right front butterfly valve 35', the right low-temperature air flow meter 36' and the right rear butterfly valve 37' in the air supply device 44 in turn.

[0054] 3) Assemble the flue gas mixing cooling air supply device 13. Assemble the flue gas mixing device air filter 42, the air mixing device cold air delivery device 38, the insulation flexible joint 39, the air mixing device flow meter 40 and the air mixing device air inlet butterfly valve 41 in the flue gas mixing cooling air supply device 13 in sequence.

[0055] 4) Install and debug the flue gas treatment device 12, and connect the flue gas treatment device 12 and the outdoor chimney 14 in place.

[0056] 5) Assemble the left jet cooling device 10 and the left jet cooling device regulating valve 16, and then assemble the right jet cooling device 10' and the right jet cooling device regulating valve 16'. Assemble the left flow stabilizing device 9 and the left flow stabilizing automatic regulating valve 15, and then assemble the right flow stabilizing device 9' and the right flow stabilizing automatic regulating valve 15'. Then connect the left flow stabilizing device 9 and the right flow stabilizing device 9' with the left observation port 5 and the right observation port 5' respectively.

[0057] 6) Connect the flue gas mixing device 8 with the smoke exhaust port 4, then connect the flue gas mixing cooling air supply device 13 with the flue gas mixing device 8, and finally connect the flue gas treatment device 12 with the flue gas mixing device 8. Connect the gas supply device 11 with the left hot air generating device 7 and the right hot air generating device 7'; connect the air supply device 44 with the left hot air generating device 7 and the right hot air generating device 7'.

[0058] Step 2, check and debug

[0059] 1) Supply gas and air to the left hot air generating device 7 and the right hot air generating device 7', and conduct a trial ignition debugging in the air. The gas flow direction 17 is from the gas supply device 11 and the air supply device 44 to the left hot air generating device 7 and the right hot air generating device 7'. After the debugging is completed, check that all the valves in the gas supply device 11 are in the closed state.

[0060] 2) Check the closing of the left flow stabilizing automatic regulating valve 15, the right flow stabilizing automatic regulating valve 15', the left jet cooling device regulating valve 16 and the right jet cooling device regulating valve 16'.

[0061] 3) Close the air mixing device air inlet butterfly valve 41 and the flue gas treatment device 12.

[0062] Step 3, temperature rising and kiln baking

[0063] 1) Switch the gas flow control mode to manual, that is, adjust the gas flow by inputting the valve opening degree to achieve the gas flow adjustment; switch the air flow control mode to manual, that is, adjust the air flow by inputting the gas ratio to achieve the frequency conversion opening degree of the fan. Then turn on the left low-temperature air delivery device 32 to deliver air to the left hot air generating device 7 for air blowing. The initial air volume is set to 300 m 3 / h.

[0064] 2) Turn on the left gas automatic regulating device inlet valve 27 and the left gas automatic regulating device outlet valve 20, control the background machine to gradually increase the opening degree of the left automatic regulating valve 23, and at the same time start ignition in the left hot air generating device 7 to make the gas and air mix and burn, and temporarily set the gas flow to 5 m 3 / h, and the air and gas ratio is initially 60:1.

[0065] 3) When the furnace pressure reaches 20~30 Pa, preferably 25 Pa, gradually open the opening degree of the left flow equalization and pressure stabilization automatic regulating valve 15 and the right flow equalization and pressure stabilization automatic regulating valve 15'; when the opening degree is 50% and the furnace pressure reaches 35 Pa, open the flue gas treatment device 12 to control the furnace pressure at 35 Pa±5 Pa, and open the roof exhaust device 6 to exhaust the hot gas flow discharged by the left flow equalization and pressure stabilization device 9 and the right flow equalization and pressure stabilization device 9'.

[0066] 4) When the space temperature of the kiln 1 reaches 250~350℃, preferably 300℃, open the standby cold air conveying device 38' of the air mixing device, and at the same time open the air inlet butterfly valve 41 of the air mixing device and the cooling flue gas mixing device 8. During the entire temperature rising process, ensure that the flue gas temperature in the flue gas mixing device 8 is not higher than 500℃.

[0067] 5) The kiln 1 is heated at a rate of 4.5℃ per hour, and the air and gas ratio is not less than 30:1 by adjusting the amount of gas and air to meet the process requirements. When the kiln temperature rises to 300~350℃, preferably 300℃, refer to step 2) to open the right hot air generating device 7'.

[0068] 6) When the temperature of the kiln 1 rises to 800~850 ℃, preferably 830℃, switch to the pure oxygen combustion gun for normal production to urgently raise the temperature. The switching order of the left and right pure oxygen guns is right B-left C-right D-left E-right F-left G-right H-left I-right J-left J-right I-left H-right G-left F-right E-left D-right C-left B-right A-left A. The initial flow of a single pure oxygen combustion gun is 5 m 3 / h, and the gas to oxygen ratio is 2.6; at the same time, gradually close the gas supply device 11 and the air supply device 44; the temperature fluctuation range of the kiln during the entire switching process is required to be controlled within 20℃.

[0069] 7) As the pure oxygen combustion gun is switched, the hot air generating device combustion gradually decreases, and the gas supply device 11 and the air supply device 44 are gradually closed; when the combustion gun switching is completed, the gas valve of the hot air generating device is closed, and after 1 minute, the left hot air generating device 7 and the right hot air generating device 7' are removed, and the feeding port is sealed.

[0070] 8) Remove left and right current sharing voltage stabilizing devices 9 and 9', and block left and right observation ports 5 and 5' with refractory material plugs. The mission of the heating-up kiln system is over.

[0071] The above merely illustrates the technical idea of the present application, and cannot be used to limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the present application.

Claims

1. A large-lead high-generation glass substrate furnace warming-up baking system, characterized in that, The kiln (1) is provided with a hot air generating device at the feeding port of the front end of the kiln (1), the hot air generating device is connected with a gas supply device (11) and an air supply device (44), the gas supply device (11) comprises two gas supply branches, the inlet end of each gas supply branch is connected with a gas source, and the outlet end is connected with the hot air generating device; the inlet end to the outlet end of each gas supply branch is sequentially connected with a gas automatic regulating device inlet valve, a pressure gauge before pressure regulation, a gas pressure sensor, an automatic regulating valve, a gas flow meter, a gas automatic regulating device, a pressure gauge after pressure regulation and a gas automatic regulating device outlet valve; the inlet end between the two gas supply branches is connected with a gas inlet bypass valve, and the outlet end between the two gas supply branches is connected with a gas outlet bypass valve; the left and right gas automatic regulating device bypasses are also connected in parallel between the two gas supply branches, the inlet end of the left and right gas automatic regulating device bypasses is connected with the gas inlet bypass valve, and the outlet end is connected with the gas outlet bypass valve; the inlet end to the outlet end of the left and right gas automatic regulating device bypasses is sequentially connected with a gas bypass inlet valve (29), a pressure gauge before pressure regulation, a gas pressure sensor, an automatic regulating valve, a gas flow meter, a left and right gas automatic regulating device (19), a pressure gauge after pressure regulation and a gas bypass outlet valve (28); the upper end of the feeding port is provided with a smoke exhaust port (4), the smoke exhaust port (4) is connected with a smoke mixing device (8), the smoke mixing device (8) is connected with a smoke treatment device (12) and a smoke mixing cooling air supply device (13) respectively, the smoke mixing cooling air supply device (13) comprises a mixing device cold air conveying device (38), a mixing device flow meter (40) and a mixing device air inlet butterfly valve (41) connected in sequence, and the mixing device air inlet butterfly valve (41) is connected with the smoke mixing device (8); the smoke treatment device (12) is connected with an outdoor chimney (14); the rear end of the kiln (1) is provided with an observation port, the observation port is connected with a uniform flow pressure stabilizing device, and the uniform flow pressure stabilizing device is connected with a jet cooling device and a roof exhaust device (6) respectively.

2. The large draw high generation glass substrate furnace warm-up firing system of claim 1, wherein, In the gas supply branch and the left and right gas automatic regulating device bypass, a gas filter is further arranged between the pressure gauge before pressure regulation and the gas pressure sensor.

3. The high throughput high generation glass substrate furnace warm-up firing system of claim 1, wherein, The gas supply control pressure range of the gas automatic regulating device and the left and right gas automatic regulating device (19) is 0.02-0.04 MPa.

4. The high throughput high generation glass substrate furnace warm-up firing system of claim 1, wherein, A smoke mixing device air filter (42) is further installed on the mixing device cold air conveying device (38).

5. The high throughput high generation glass substrate furnace warm-up firing system of claim 1, wherein, The mixing device cold air conveying device (38) is further connected in parallel with a mixing device standby cold air conveying device (38').

6. The high throughput high generation glass substrate furnace warm-up firing system of any one of claims 1-5, wherein, The air supply device (44) is sequentially provided with a low-temperature air conveying device, a front butterfly valve, a low-temperature air flow meter and a rear butterfly valve from the inlet end to the outlet end.

7. The high throughput high generation glass substrate furnace warm-up firing system of claim 6, wherein, A hot air device low-temperature air filter (33) is further installed on the low-temperature air conveying device.

8. The high throughput high generation glass substrate furnace warm-up firing system of any one of claims 1-5, wherein, The hot air generating device comprises a left hot air generating device (7) and a right hot air generating device (7').

9. The high throughput high generation glass substrate furnace warm-up firing system of any one of claims 1-5, wherein, A uniform flow pressure stabilizing automatic regulating valve is arranged between the uniform flow pressure stabilizing device and the roof exhaust device (6).

10. The high throughput high generation glass substrate furnace warm-up firing system of any one of claims 1-5, wherein, The flue gas mixing device (8) is insulated from the flue gas treatment device (12) and the flue gas mixing and cooling air supply device (13).

11. The high throughput high generation glass substrate furnace warm-up firing system of any one of claims 1-5, wherein, The hot air generating device and the flue gas mixing device (8) are made of SUS310 material which is resistant to high temperature.

12. A method for heating up a large throughput high generation glass substrate furnace, characterized by, The steps are as follows: 1) Assemble and debug the large lead-out high-generation glass substrate kiln heating and baking system of claim 9; 2) Adjust the air supply device (44) according to the target air flow and proportion, adjust the gas supply device (11) according to the target gas flow and proportion, and ignite the hot air generating device at the same time, so that the gas and air are mixed and burned according to the target proportion; 3) When the furnace pressure reaches 20~30 Pa, adjust the opening of the uniform flow and pressure stabilizing automatic regulating valve, and when the opening is 50% and the furnace pressure reaches 35 Pa, open the flue gas treatment device (12), control the furnace pressure at 35 Pa±5 Pa, and open the roof exhaust device (6) to exhaust the hot air flow discharged by the uniform flow and pressure stabilizing device; 4) When the kiln space temperature reaches 250~350℃, open the flue gas mixing and cooling air supply device (13) to cool the flue gas mixing device (8), and ensure that the flue gas temperature in the flue gas mixing device (8) is not higher than 500℃ during the whole heating process; 5) Heat the kiln according to the target rate, and when the kiln temperature rises to 800~850℃, switch to pure oxygen combustion gun for urgent heating, and gradually close the gas supply device (11) and the air supply device (44); 6) When the combustion gun switching is completed, close the gas valve of the hot air generating device, then remove the hot air generating device, block the feeding port, finally remove the uniform flow and pressure stabilizing device and block the observation port, and complete the heating and baking process.

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