Energy-saving tempered flat plate glass tempering furnace

Abstract

The utility model provides an energy-saving tempered flat glass tempering furnace, which relates to the technical field of tempering furnaces and comprises a tempering furnace body, a preheating chamber is mounted on the left side of the tempering furnace body, a waste gas outlet pipe is arranged at the top of the tempering furnace body, and a waste gas filtering component is arranged at the joint of the waste gas outlet pipe. The waste gas filtering assembly is used for filtering harmful substances in waste gas, the flow dividing pipeline can conduct different utilization on the filtered high-heat waste gas, the high-heat waste gas can be conveyed into the preheating chamber to be preheated in the continuous production process, and meanwhile the temperature sensor can monitor the temperature of the gas in real time; when the temperature does not reach the standard, the waste gas reheating assembly is started to reheat the gas, compared with a traditional direct gas heating mode, the mode can save a large amount of energy, after production is stopped, high-heat waste gas can be used for preheating other equipment or heating water through the flow dividing pipe, the living requirements of workers are met, and the production efficiency is improved. And energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to toughening furnace technical field especially relates to energy -conserving toughened flat glass toughening furnace. BACKGROUND

[0002] In the toughening production process of flat glass, the toughening furnace is the core equipment, and its operation needs to consume a large amount of energy. The traditional toughening furnace usually takes electricity, gas or fuel oil as the energy source, in the process of heating the glass to the softening point and carrying out the toughening treatment, only a part of energy is absorbed by the glass for the change of its physical properties, and a considerable proportion of energy is lost to the surrounding environment in the form of waste gas waste heat, furnace heat dissipation.

[0003] With the continuous rise of energy cost and the increasing requirement of environmental protection, the energy saving of the toughening furnace becomes the key problem to be solved in the glass manufacturing industry. On the one hand, the fluctuation of energy price directly affects the production cost of enterprises, and high energy consumption means that enterprises face greater economic pressure in market competition. On the other hand, the direct emission of a large amount of waste heat not only causes the waste of energy, but also may cause thermal pollution and other adverse effects on the surrounding environment.

[0004] The previous toughening furnace has many deficiencies in heat management. The existing toughening furnace lacks effective waste heat recovery mechanism, and the waste gas is directly discharged into the atmosphere. The furnace body is not well insulated and heat recycling design. The production mode of glass manufacturing enterprises usually has certain intermittence. The demand for heat in the production process mainly concentrates in the glass heating and toughening link, and in the non-production period (after work, during equipment maintenance, etc.), the heat demand of the production line is greatly reduced or even zero. This production characteristic makes the heat supply of the toughening furnace and the actual demand mismatch in time and quantity. If the waste heat cannot be reasonably allocated and utilized at different times, a large amount of energy will be wasted. Therefore, it is of extremely important practical significance to develop a kind of technology scheme which can flexibly and efficiently recover and utilize the waste heat of the toughening furnace according to the actual situation of production.

[0005] Therefore, we propose an energy-saving toughened flat glass toughening furnace. CONTENT OF THE UTILITY MODEL

[0006] The utility model discloses a powder metallurgy forming conveying device, which can realize the cleaning of the product surface during the conveying process, and can effectively prevent the dust and impurities from entering the subsequent process, thereby improving the appearance quality of the product and avoiding the adverse effects on the subsequent processing technology (such as sintering, surface treatment, etc.).

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] The energy-saving tempered flat plate glass tempering furnace, comprising a tempering furnace body, a preheating chamber is installed on the left side of the tempering furnace body, an exhaust gas outlet pipe is arranged on the top of the tempering furnace body, an exhaust gas filtering assembly is arranged at the connecting position of the exhaust gas outlet pipe, the exhaust gas filtering assembly is used for filtering harmful substances in the exhaust gas, a purification outlet pipe is arranged at the back side of the exhaust gas filtering assembly, a shunt pipe is arranged at the connecting position of the purification outlet pipe, two electromagnetic valves are further arranged at the connecting position of the shunt pipe, an exhaust gas reheating assembly is further arranged at the left side of the shunt pipe, and the exhaust gas reheating assembly is used for reheating the exhaust gas.

[0009] The exhaust gas filtering assembly comprises a mounting shell, a filter core body and two first connecting flanges, and the exhaust gas reheating assembly comprises a plurality of heating rods, a controller and a temperature sensor.

[0010] As a preferred scheme of the utility model, the exhaust gas filtering assembly further comprises a plurality of limiting grooves, a plurality of limiting blocks and two connecting pipes, a plurality of limiting grooves are arranged on the two side walls in the mounting shell, a plurality of limiting blocks are arranged at the connecting position of the plurality of limiting grooves, a filter core body is arranged on the plurality of limiting blocks, a connecting pipe is arranged on the front side and the back side of the filter core body, and a first connecting flange is arranged on the two connecting pipes.

[0011] As a preferred scheme of the utility model, a second connecting flange is arranged on the back side of the exhaust gas outlet pipe and the front side of the purification outlet pipe, the exhaust gas outlet pipe and the purification outlet pipe are connected with the two first connecting flanges through the second connecting flange, and the filter core body is inserted into the plurality of limiting grooves through the plurality of limiting blocks.

[0012] As a preferred scheme of the utility model, the electromagnetic valve close to the right side is used for controlling the opening and closing of the right side section of the shunt pipe, and the electromagnetic valve close to the left side is used for controlling the opening and closing of the left side section of the shunt pipe.

[0013] As the preferred scheme of the utility model, the waste gas reheating assembly further comprises a mounting box, a mounting seat and a recovery pipe, a plurality of heating rods are arranged in the mounting box, a controller is mounted on the back side of the mounting box, the recovery pipe is mounted on the left side of the mounting box, the mounting seat is mounted on the bottom of the mounting box, and the mounting seat fixes the mounting box and the tempered furnace body.

[0014] As the preferred scheme of the utility model, the temperature sensor is mounted in the inside of the left shunt pipe and the left side section of the left electromagnetic valve, the temperature sensor is electrically connected with the controller, and the recovery pipe connects the mounting box and the preheating chamber.

[0015] As the preferred scheme of the utility model, the front side of the tempered furnace body is further provided with a PLC computer, and the PLC computer is electrically connected with the waste gas reheating assembly.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] In the utility model, the waste gas generated in the operation process of the tempered furnace is treated by the waste gas filtering assembly, the content of harmful substances such as dust particles, sulfides and nitrogen oxides in the waste gas can be significantly reduced, the high-temperature gas purified can enter the shunt pipe, and preparation for subsequent reuse is made (since the preheating chamber is open, the toxic and harmful gas is prevented from directly entering the preheating chamber, and the workers are prevented from being in a toxic and harmful environment for a long time).

[0018] The shunt pipe can utilize the filtered high-temperature waste gas in different ways, the high-temperature waste gas can be sent to the preheating chamber for preheating during continuous production, the temperature sensor can monitor the temperature of the gas in real time, the waste gas reheating assembly is started when the temperature is not up to standard, the gas is reheated, compared with the traditional direct heating mode of the gas, a large amount of energy can be saved, and after the production is stopped, the high-temperature waste gas can be used for preheating or heating water for other equipment to meet the living needs of the workers, and energy is saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model provides a main body structure schematic diagram of energy-saving tempered flat glass tempered furnace;

[0020] Figure 2 The utility model provides a top view structure schematic diagram of energy-saving tempered flat glass tempered furnace;

[0021] Figure 3 The utility model provides an explosion schematic diagram of waste gas filtering assembly and waste gas reheating assembly of energy-saving tempered flat glass tempered furnace.

[0022] Figure 4 The energy-saving tempered flat plate glass tempering furnace temperature sensor installation schematic diagram is provided.

[0023] Legend: 1, tempered furnace body; 2, preheating chamber; 3, waste gas outlet pipe; 4, installation shell; 5, limiting groove; 6, filter core body; 7, limiting block; 8, connecting pipe; 9, first connecting flange; 10, purification outlet pipe; 11, second connecting flange; 12, shunt pipe; 13, electromagnetic valve; 14, installation box; 15, heating rod; 16, controller; 17, mounting seat; 18, temperature sensor; 19, recovery pipe; 20, PLC computer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In order to facilitate understanding of the present application, the present application will be more fully described below with reference to the related description, and several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] Embodiment: As Figures 1-4As shown, the utility model provides a technical solution: when the tempering furnace is in operation, a large amount of exhaust gas is generated, which contains various harmful substances such as dust particles, sulfides, nitrogen oxides, etc. The exhaust gas filter component plays a vital purification role in the entire system.

[0029] The mounting housing 4 serves as an external supporting structure for the filter element body 6 and has sufficient strength and stability to withstand the impact of high-temperature exhaust gas and internal pressure.

[0030] The limiting grooves 5 precisely machined on the two side walls inside have specific size and spacing requirements in the horizontal and vertical directions. The corresponding limiting blocks 7 on the filter element body 6 must be accurately embedded in these limiting grooves 5 during installation to ensure that the filter element will not be displaced or shaken during operation, thereby ensuring the stability of the filtering effect.

[0031] The outer metal fiber mesh of the filter element body 6 has a carefully designed wire diameter and weaving density. For example, the wire diameter may be between 0.1 and 0.5 mm, and it is woven into a structure with 100 to 500 mesh holes per square centimeter. This can effectively intercept dust particles with a diameter larger than the mesh size without causing excessive resistance to the flow of exhaust gas.

[0032] The activated carbon fiber felt or special ceramic fiber filter material in the middle layer has a complex and diverse micropore structure, and the diameter of the micropores is distributed between 0.01 and 1 micron. This tiny pore size can capture extremely small dust particles and adsorb volatile organic compounds such as formaldehyde and benzene series and some gaseous harmful substances such as sulfides and nitrogen oxides through van der Waals forces and intermolecular diffusion. For example, some dust particles with a diameter of about 0.1 micron are adsorbed and attached to the inner surface of the micropores due to their close contact with the micropore walls when passing through the middle layer.

[0033] The metal oxide catalyst in the inner layer is selected and proportioned according to the type and concentration of the sulfides and nitrogen oxides to be treated. For example, for sulfur dioxide, alkaline metal oxides such as calcium oxide may be used as catalysts. The reaction principle is that sulfur dioxide and calcium oxide react chemically under certain temperature and humidity conditions to generate solid substances such as calcium sulfate, thereby fixing the sulfur dioxide on the filter element to achieve the purpose of removal. For nitrogen oxides, precious metal catalysts such as platinum and palladium may be used to catalytically convert nitrogen oxides into nitrogen and water in the presence of oxygen.

[0034] The connection between the connecting pipe 8 and the filter core body 6 is by welding or high-strength sealant connection to ensure the sealing of the connection. The first connecting flange 9 and the second connecting flange 11 have strict requirements for the size and tightening torque of the bolts when connected, for example, high-strength bolts of M10-M16 are used, the tightening torque is between 30-100 Nm, and at the same time, graphite or ceramic fiber gasket with high temperature resistance is used to ensure that the exhaust gas does not leak from the connection when flowing through the filter assembly.

[0035] The design of the shunt pipe 12 is based on the principle of fluid mechanics, and the pipe diameter is accurately calculated according to the flow and flow rate of the exhaust gas. Generally speaking, for exhaust gas with a flow rate of 10-100 cubic meters / hour, the pipe diameter can be selected between 50-200 mm. The inner wall of the pipe is treated to reduce the roughness to 0.1-0.5 microns to reduce the frictional resistance of the exhaust gas flow and reduce pressure loss.

[0036] The electromagnetic valve 13 near the right side is composed of an electromagnetic coil and an iron core. When the electromagnetic coil is energized, the magnetic field generated by the electromagnetic coil attracts the iron core, overcoming the spring force of the valve core spring, and moving the valve core upward to open the right side of the shunt pipe 12. The number of turns, wire diameter and voltage of the electromagnetic coil are designed according to the required electromagnetic force, for example, the number of turns of the electromagnetic coil can be between 500-2000 turns, the wire diameter is between 0.5-1.5 mm, and the voltage is 24-220 volts to generate enough electromagnetic force to drive the valve core to act. The valve core and valve seat adopt a conical or spherical sealing structure, and the surface roughness of the sealing surface is between 0.05-0.2 microns and is ground to ensure the sealing performance in the closed state and prevent exhaust gas leakage.

[0037] The working principle of the electromagnetic valve 13 near the left side is similar to that of the right side, but it controls the left side of the shunt pipe 12. The controller 16 precisely controls the opening and closing of the electromagnetic valve 13 by controlling the energization time and frequency of the electromagnetic coil of the electromagnetic valve 13. For example, during continuous production, the controller 16 keeps the left electromagnetic valve 13 energized and open according to the preset program, and the right electromagnetic valve 13 is de-energized and closed. The exhaust gas flows to the exhaust gas reheating assembly and the preheating chamber 2. When production stops or switches to other energy recovery modes, the controller 16 changes the output signal to energize the right electromagnetic valve 13 and de-energize the left electromagnetic valve 13. The exhaust gas flows to other designated equipment or exhaust passage.

[0038] The heating rods 15 installed in the installation box 14 are uniformly distributed around the inner wall of the box, and the power thereof is calculated and determined according to the flow rate, initial temperature of the waste gas and the target temperature required by the preheating chamber 2. For example, for waste gas with a flow rate of 50 cubic meters / hour and an initial temperature of 200℃, if it is required to be heated to 400℃ for being sent to the preheating chamber 2, the total power of the heating rods 15 can be selected between 30-100 kilowatts. The material of the heating rods 15 is usually selected from nickel-chromium alloy or iron-chromium-aluminum alloy which has good high-temperature resistance and oxidation resistance, and the surface temperature thereof can be adjusted between 600-1000℃.

[0039] The temperature sensor 18 adopts a thermocouple or a thermal resistance sensor, and the measurement accuracy thereof is between ±0.5-±2℃. When the temperature sensor 18 is installed in the left shunt pipe 12, the probe thereof penetrates into the pipe interior by a certain distance, for example, 5-10 centimeters, so as to accurately measure the temperature of the waste gas. When the temperature sensor 18 detects that the temperature of the waste gas is lower than the preset target temperature, the temperature signal is converted into an electric signal and transmitted to the controller 16. The controller 16 generally adopts a programmable logic controller 16 (PLC) or a microprocessor, and the internal storage thereof has a preset temperature control program and algorithm. For example, a PID control algorithm is adopted, the power or the power-on time of the heating rods 15 is calculated according to the size of the temperature deviation and the change rate of the factors, so as to accurately control the working state of the heating rods 15, and make the temperature of the waste gas quickly and stably rise to the target temperature.

[0040] The mounting seat 17 at the bottom of the installation box 14 is fastened and connected with the steelizing furnace body 1 through bolts, and the number, distribution and fastening torque of the bolts are designed and calculated to ensure the firmness of the installation box 14 in a harsh environment such as high temperature and vibration. The connection between the recovery pipe 19 and the installation box 14 and the preheating chamber 2 adopts a flange connection or a welding mode, and the connection is sealed to prevent waste gas leakage. The pipe diameter of the recovery pipe 19 is determined according to the flow rate and flow speed of the waste gas, and is generally slightly smaller than that of the shunt pipe 12. For example, when the pipe diameter of the shunt pipe 12 is 100 millimeters, the pipe diameter of the recovery pipe 19 can be between 80-100 millimeters, so as to ensure that the waste gas has sufficient flow speed and pressure in the recovery pipe 19 and smoothly enters the preheating chamber 2.

[0041] In summary, in the actual use process, the waste gas generated by the operation of the steelizing furnace enters the waste gas filtering assembly through the waste gas outlet pipe 3 under the action of pressure at a certain flow speed (for example, 5-20 meters / second).

[0042] The waste gas first contacts the outer metal fiber mesh of the filter element body 6, and the large-particle dust is intercepted on the mesh surface due to inertial impact. Part of the smaller particles continues to move to the inside of the filter element under the driving of the airflow.

[0043] When passing through the intermediate layer, the fine dust is adsorbed by the micropores, and gaseous harmful substances such as sulfides and nitrogen oxides are subjected to physical adsorption and chemical conversion reactions with the activated carbon fiber felt or ceramic fiber filter material and the metal oxide catalyst in the inner layer, and the purified exhaust gas enters the shunt pipe 12 in a relatively clean state.

[0044] In the continuous production mode, the controller 16 controls the state of the electromagnetic valve 13 according to the preset program, so that the electromagnetic valve 13 close to the left side is powered on and opened, and the electromagnetic valve 13 close to the right side is powered off and closed.

[0045] The exhaust gas enters the exhaust gas reheating assembly, and the temperature sensor 18 monitors the exhaust gas temperature in real time and transmits the signal to the controller 16.

[0046] If it is detected that the temperature is lower than the required temperature of the preheating chamber 2 (for example, lower than 350 DEG C), the controller 16 starts the heating rod 15, the heating rod 15 is powered on and heated, the air temperature in the installation box 14 is raised through heat conduction, and the hot air is fully exchanged with the exhaust gas, and the heat of the heating rod 15 is also directly transmitted to the exhaust gas through heat radiation, so that the temperature of the exhaust gas is gradually increased.

[0047] When the exhaust gas temperature reaches the target temperature (for example, 400 DEG C), under the action of the pressure difference, the heated exhaust gas enters the preheating chamber 2 through the recovery pipe 19, and in the preheating chamber 2, the exhaust gas transmits heat to the glass raw piece, so that the temperature of the glass raw piece is raised from room temperature (for example, 20 DEG C) to a certain temperature (for example, 100-200 DEG C), reducing the time and energy consumption required for the subsequent steeling furnace body 1 to heat the glass raw piece.

[0048] When the production is stopped or there is other energy recovery demand, for example, it is required to provide heat energy for the domestic water heating system in the factory or to preheat other equipment, the controller 16 changes the control state of the electromagnetic valve 13 according to the preset instruction or manual operation signal, so that the electromagnetic valve 13 close to the right side is powered on and opened, and the electromagnetic valve 13 close to the left side is powered off and closed, at this time, the exhaust gas directly flows to other designated equipment or channel through the right side of the shunt pipe 12, and diversified energy recovery utilization is realized by using the waste heat of the exhaust gas, the energy comprehensive utilization rate of the whole system is improved, and energy waste and adverse effects on the environment are reduced.

[0049] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An energy-saving tempered flat glass tempering furnace, comprising a tempering furnace body (1), characterized in that: A preheating chamber (2) is installed on the left side of the tempering furnace body (1), an exhaust gas outlet pipe (3) is provided on the top of the tempering furnace body (1), an exhaust gas filter assembly is provided at the connection of the exhaust gas outlet pipe (3), and the exhaust gas filter assembly is used to filter harmful substances in the exhaust gas, a purification outlet pipe (10) is provided on the back side of the exhaust gas filter assembly, a diversion pipe (12) is provided at the connection of the purification outlet pipe (10), and two solenoid valves (13) are also provided at the connection of the diversion pipe (12), and an exhaust gas reheating assembly is also provided on the left side of the diversion pipe (12), and the exhaust gas reheating assembly is used to reheat the exhaust gas; The exhaust gas filter assembly comprises a mounting housing (4), a filter element body (6) and two first connecting flanges (9); the exhaust gas reheating assembly comprises a plurality of heating rods (15), a controller (16) and a temperature sensor (18).

2. The energy-saving tempered flat glass tempering furnace according to claim 1, characterized in that: The exhaust gas filter assembly further comprises a plurality of limiting grooves (5), a plurality of limiting blocks (7) and two connecting pipes (8), wherein the plurality of limiting grooves (5) are provided on both side walls inside the mounting shell (4), a plurality of limiting blocks (7) are provided at the connection points of the plurality of limiting grooves (5), a filter element body (6) is installed on the plurality of limiting blocks (7), a connecting pipe (8) is installed on the front and back sides of the filter element body (6), and a first connecting flange (9) is installed on both connecting pipes (8).

3. The energy-saving tempered flat glass tempering furnace according to claim 2, characterized in that: A second connecting flange (11) is installed on the back side of the exhaust gas outlet pipe (3) and the front side of the purification outlet pipe (10). The exhaust gas outlet pipe (3) and the purification outlet pipe (10) are connected to the two first connecting flanges (9) via the second connecting flange (11). The filter element body (6) is inserted into the plurality of limiting grooves (5) via a plurality of limiting blocks (7).

4. The energy-saving tempered flat glass tempering furnace according to claim 3, characterized in that: The solenoid valve (13) close to the right side is used to control the opening and closing of the right side section of the shunt pipe (12), and the solenoid valve (13) close to the left side is used to control the opening and closing of the left side section of the shunt pipe (12).

5. The energy-saving tempered flat glass tempering furnace according to claim 4, characterized in that: The exhaust gas reheating assembly further comprises a mounting box (14), a mounting seat (17) and a recovery pipe (19); a plurality of heating rods (15) are provided inside the mounting box (14); a controller (16) is mounted on the back side of the mounting box (14); a recovery pipe (19) is mounted on the left side of the mounting box (14); a mounting seat (17) is mounted on the bottom of the mounting box (14); and the mounting seat (17) fixes the mounting box (14) to the tempering furnace body (1).

6. The energy-saving tempering furnace for tempered flat glass according to claim 5, characterized in that: The temperature sensor (18) is installed inside the shunt pipe (12) on the left side and is located on the left section of the solenoid valve (13) on the left side. The temperature sensor (18) is electrically connected to the controller (16). The recovery pipe (19) connects the installation box (14) and the preheating chamber (2).

7. The energy-saving tempering furnace for tempered flat glass according to claim 6, characterized in that: A PLC computer (20) is also provided on the front of the tempering furnace body (1), and the PLC computer (20) is electrically connected to the exhaust gas reheating component.

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