Glass fiber production kiln with multi-stage heating function

Abstract

The invention discloses a glass fiber production kiln with a multi-stage heating function, and relates to the technical field of kilns, the glass fiber production kiln comprises a kiln body; the material mixing component is used for mixing the powder raw material with the diluted binder to form a mixture; the granulating part is used for granulating the mixture; the drying part is used for drying and primarily heating the prepared particles by utilizing the exhaust waste heat of the kiln; and the sintering part is used for sintering the dried particles, so that secondary heating of the particles is completed while the binder is decomposed. According to the invention, through the arrangement of the granulation part, before the raw materials are added into the kiln body, the raw materials are mixed and granulated technically, so that the raw materials exist in the kiln in a particle form, and the situation that the powdery raw materials fly around when being impacted by flames is avoided; in addition, larger gaps exist between the granular raw materials relative to the powder, flames can burn into the raw materials through the gaps between the raw material particles, and the melting effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of kilns, and in particular to a kiln for glass fiber production with a multi-stage heating function. Background Art

[0002] A kiln is an industrial equipment that processes materials through high-temperature calcination or melting processes. It is usually built with refractory materials (such as high-alumina bricks, chrome bricks, etc.) and is widely used in ceramics, glass, cement, metal processing and other fields. Its main function is to complete the physical and chemical reactions of materials (such as melting, sintering, clarification, etc.) by controlling the temperature, atmosphere and pressure curve, and finally form products with specific properties.

[0003] Glass fiber is an inorganic non-metallic material with excellent performance. Its production process uses silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, alkali metal oxides, boric oxide and other additives as raw materials through high-temperature melting, wire drawing, winding, weaving and other processes. Among them, among the raw materials of glass fiber, silicon dioxide (silica sand), aluminum oxide (bauxite or calcined alumina), calcium oxide (limestone), magnesium oxide (dolomite), alkali metal oxides (soda ash or potash), boric oxide (boric acid or borax) and other additives such as clarifiers (sulfates) are usually in powder form, especially mineral raw materials need to be crushed to a certain fineness for uniform mixing and melting.

[0004] The kiln needs to use flames to spray raw materials to melt them. The flame itself has a certain airflow impact. When it directly acts on the raw materials, the powder will fly, causing the raw materials (such as alkali metal oxides, borides, etc.) to escape from the kiln, resulting in the loss of effective ingredients, destroying the preset chemical ratio, and affecting the physical properties of the glass fiber (such as strength and heat resistance); secondly, the raised powder may be deposited on the upper part of the kiln (such as the vault, flue), forming nodules or blockages, reducing thermal efficiency and increasing maintenance costs, and being discharged with the exhaust gas, resulting in particulate pollution; thirdly, if the raised powder is not completely melted, it may form unmelted particles, streaks or bubbles, affecting the uniformity and mechanical properties of the glass fiber; finally, the gaps between powdered raw materials are smaller, so the flame can only directly act on the surface raw materials, and the molten liquid produced after the surface raw materials are melted will coat the inner raw materials, thereby affecting the melting effect. Summary of the invention

[0005] The object of the present invention is to provide a kiln for glass fiber production with a multi-stage heating function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A kiln for glass fiber production with multi-stage heating function, including a kiln body; further including: a mixing component, used for mixing powder raw materials and diluted binder to form a mixture; a granulating component, arranged below the mixing component, used for granulating the mixture; a drying component, used for drying and preliminarily heating the formed granules by using the waste heat of the exhaust gas of the kiln body; a sintering component, used for sintering the dried granules, decomposing the binder and completing the secondary heating of the granules at the same time; the mixing component includes a mixing tank, the top of the inner wall of the mixing tank is rotatably connected with a hollow shaft, the outside of the hollow shaft is fixedly connected with a rotating frame, both ends of the rotating frame are symmetrically and fixedly installed with mixing motors, the output ends of the mixing motors are fixedly connected with spiral stirring rods, the top of the mixing tank is fixedly connected with a transmission box, the top of the mixing tank is fixedly installed with a driving motor, the output end of the driving motor extends into the interior of the transmission box and is fixedly connected with a first bevel gear, the outer wall of the hollow shaft is fixedly connected with a second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0007] By adopting the above technical solution, through setting the granulating component, before adding the raw materials into the kiln body, the raw materials are mixed and granulated in the process first, so that the raw materials exist in the kiln in the form of granules, thus avoiding the situation that the powdery raw materials fly around when being impacted by the flame. In addition, there are larger gaps between the granular raw materials relative to the powder, avoiding the situation that only the peripheral raw materials can be melted first during the combustion of the powdery raw materials, resulting in agglomeration. At the same time, based on the fact that the flame can burn to the inside through the gaps between the raw material granules, the melting effect is improved.

[0008] A further improvement of the technical solution of the present invention lies in: the mixing component further includes a dilution tank, the dilution tank is fixedly connected to the top of the inner wall of the mixing tank, a filling port is arranged at the top of the dilution tank, the top of the hollow shaft penetrates above the transmission box and is fixedly connected with a rotary joint, a spray head is installed at the bottom end of the hollow shaft, the hollow shaft penetrates through the dilution tank and is rotatably connected with the dilution tank, stirring blades are fixedly connected to the outer wall of the hollow shaft and inside the dilution tank, a feeding structure for regularly extracting the binder from the dilution tank to the mixing tank is arranged at the top of the mixing tank, and a blanking pipe with an electric valve is arranged at the lower end of the mixing tank; the lengths of the two spiral stirring rods are different.

[0009] By adopting the above technical solution, through setting the dilution tank, the binder is diluted in advance, and then the diluted binder is regularly sprayed into the powder raw materials by using the feeding structure, thus reducing the occurrence of agglomeration.

[0010] A further improvement of the technical solution of the present invention lies in: the feeding structure includes a metering cylinder fixedly connected to the top of the mixing tank. A first piston plate is slidably connected to the lower part of the inner wall of the metering cylinder, and a second piston plate is slidably connected to the upper part of the inner wall of the metering cylinder. A linkage rod is fixedly connected between the first piston plate and the second piston plate. A strip-shaped groove is opened at the middle position of the metering cylinder. A tension spring is fixedly connected between the bottom of the first piston plate and the bottom of the inner wall of the metering cylinder. A valve body is fixedly connected to the upper end of the metering cylinder. A release pipe is arranged on the side of the valve body away from the metering cylinder. A spherical valve core is rotatably connected between the inner walls of the valve body. A through hole is opened at the middle position of the valve core. The central axis of the valve core extends to the outside of the valve body and is fixedly connected with a transmission gear. A slide rail is fixedly connected to the outer wall of the metering cylinder. A slider is slidably connected to the outer wall of the slide rail. A rack is fixedly connected to one side of the slider. The rack is meshed with the transmission gear. A movable rod is fixedly connected to the side wall of the linkage rod. One end of the movable rod away from the linkage rod extends to the outside of the metering cylinder through the strip-shaped groove and is fixedly connected with an L-shaped plate. Two push plates are fixedly connected to one side of the L-shaped plate. A piston cylinder is fixedly connected to the top of the mixing tank. A third piston plate is slidably connected between the inner walls of the piston cylinder. An air inlet pipe and an air outlet pipe are arranged on the piston cylinder. One-way valves are arranged inside both the air inlet pipe and the air outlet pipe. One end of the air inlet pipe away from the piston cylinder is communicated with the upper end of the metering cylinder through a pipeline. Liquid extraction holes are opened at the part of the hollow shaft located inside the dilution tank. One-way valves are arranged inside both the liquid extraction holes and the part of the hollow shaft close to the nozzle. A turntable is rotatably connected to one side of the transmission box. A rocker is rotatably connected to a position deviated from the center of the side wall of the turntable. The bottom of the rocker extends into the inside of the piston cylinder and is rotatably connected to the top of the third piston plate. The central axis of the turntable extends into the inside of the transmission box and is fixedly connected with a third bevel gear. The third bevel gear is meshed with the second bevel gear. The lower end of the metering cylinder is communicated with the top end of the rotary joint through a pipeline.

[0011] By adopting the above technical solution, by linking the hollow shaft with the feeding structure, energy (air pressure) is accumulated in the metering cylinder during the mixing process. At the same time, the hollow shaft extracts the binder and releases it when a certain threshold is reached, so that the binder is sprayed from the nozzle part into the mixing tank under the action of air pressure.

[0012] A further improvement of the technical solution of the present invention lies in: a fixing plate is fixedly connected to the top of the mixing tank. A hanging pin is fixedly connected to one side of the fixing plate. Two limiting columns are fixedly connected to the side of the fixing plate where the hanging pin is located. A swing rod is rotatably connected to the side of the fixing plate where the hanging pin is located. A tension spring is suspended between the end of the swing rod and the hanging pin. The rack part has no teeth, and a sliding sleeve is inserted through the part of the rack without teeth. A sliding rod is fixedly connected to the end of the swing rod. The sliding rod penetrates through the sliding sleeve and is slidably connected to the inner wall of the sliding sleeve.

[0013] With the above technical solution, a valve core auxiliary rotation structure is also designed based on the extrusion method of the binder. During the movement of the rack, the sliding sleeve can drive the sliding rod to move upward at the same time, so that the swing rod swings. The hanging pin is on the central axis of the two limit posts. Before the swing rod swings past the central axis of the two limit posts, the swing rod is affected by the tension spring and poses a certain resistance to the push. When the swing rod swings past the position of the central axis of the two limit posts, the elastic force direction of the tension spring suddenly changes to the direction of pulling the swing rod to swing upward, so that the swing rod swings upward quickly, drives the rack to move upward quickly through the sliding rod, and drives the transmission gear to rotate quickly, so that the valve core can quickly rotate to a state where it is exactly opposite to the release pipe, enabling the air pressure in the upper part of the metering cylinder to be quickly released, and at the same time avoiding the problem of the slow reset speed of the first piston plate.

[0014] A further improvement of the technical solution of the present invention is that: the granulation component includes a granulator, and a template is provided at the output end of the granulator. The template is provided with cross-shaped die holes.

[0015] With the above technical solution, by setting the cross-shaped die holes, the end face of the extruded particles is a cross-shaped columnar structure. The gaps between them are larger when stacked irregularly, making it easier for the flame to penetrate into the interior through the gaps between the particles and improving the combustion efficiency.

[0016] A further improvement of the technical solution of the present invention is that: the drying component includes a support frame and a heat exchanger. One side of the inner wall of the support frame is fixedly connected with a wheel core, and the other side of the inner wall of the support frame opposite to the wheel core is rotatably connected with a wheel frame. The wheel core is slidably connected with the inner wall of the wheel frame. The two bottom surfaces of the wheel frame are both set as filter screen structures. A plurality of partition plates are fixedly connected to the inside of the wheel frame, and the partition plates are arranged in a ring in the wheel frame. A feeding motor is fixedly installed on one side of the support frame, and the output end of the feeding motor is fixedly connected with the central axis of the wheel frame. Two fixing rings are symmetrically and fixedly connected to the top of the support frame, and an air outlet pipe is fixedly connected to the inside of the fixing rings. The heat exchanger is communicated with the air outlet pipe through a pipeline and is also communicated with the exhaust port of the kiln body through a pipeline; a discharge port is fixedly connected to the top of the wheel core, and a discharge pipe communicated with the discharge port is fixedly connected to one side of the wheel core; the discharge pipe is communicated with the input end of the sintering component, and the output end of the sintering component is communicated with the feeding port of the kiln body through an external feeder.

[0017] With the above technical solution, by providing a relatively rotatable wheel frame and arranging a partition inside the wheel frame to divide the interior of the wheel frame into chambers of the same size, the wheel seat contacts with two-thirds of the arc length of the inner wall of the wheel frame, so that when the wheel frame rotates to the position in contact with the wheel seat, the particles in the corresponding chamber cannot fall out; specifically, by controlling the feeding motor to work, driving the wheel frame to rotate, the particles are conveyed along with the rotation of the wheel frame until they are conveyed directly above the wheel seat, at which time the particles fall into the discharge port and then into the sintering component through the discharge pipe. The sintering component is a rotary furnace that can sinter the particles. The sintering temperature is higher than the drying temperature and lower than the temperature inside the kiln. On the one hand, it can decompose the binder, and on the other hand, it can perform a secondary heating on the raw materials to prevent cracking of the raw materials and generation of powder during the sintering process. Among them, part of the heat source of the rotary furnace can be provided by the waste heat recovery of the kiln, and a compensation heating structure is additionally arranged inside it to ensure that the temperature reaches the sintering temperature.

[0018] A further improvement of the technical solution of the present invention lies in that: a plurality of fixed sleeves are connected through the side wall of the wheel frame. The inner walls of the fixed sleeves are all slidably connected with pressure rods. One end of each pressure rod is fixedly connected with a hemispherical pressing head. The end of the pressure rod away from the pressing head extends into the interior of the wheel frame. A spiral groove is formed on the outer wall of the pressure rod. A transmission buckle is fixedly connected to the inner side of the fixed sleeve. The transmission buckle is slidably connected with the spiral groove. A spring is sleeved outside the pressure rod between the sliding sleeve and the pressing head. A plurality of trigger rods are fixedly connected between the two sides of the two fixed rings close to each other. A turning rod is fixedly connected to the side wall of the pressure rod inside the wheel frame.

[0019] With the above technical solution, by providing pressure rods that can move axially and synchronously in the circumferential direction, and cooperating with the turning rods, the raw material drying process becomes more uniform; specifically, during the rotation of the wheel frame, the pressing head intermittently contacts and squeezes with the trigger rods. Under the squeezing action, the pressure rod moves axially, squeezing the spring. At the same time, along with the axial movement of the pressure rod, it cooperates with the spiral groove and the transmission buckle to make the pressure rod rotate circumferentially at the same time, so that the turning rods turn the raw material particles; after the pressing head passes the pressure rod, the pressing head resets under the action of the spring rebound.

[0020] A further improvement of the technical solution of the present invention lies in that: the inside of the wheel core is arranged as a hollow structure. A filter hole is provided at the bottom of the discharge port. A dust discharge pipe is provided at the bottom of the wheel core.

[0021] With the above technical solution, during the drying process, there are some small-sized debris. The debris enters the discharge port along with the particles and is screened. The small-sized debris falls into the wheel core through the filter hole and is discharged from the dust discharge pipe, while the large particles are sent out through the discharge pipe.

[0022] A further improvement of the technical solution of the present invention lies in that: the binder is silica sol.

[0023] With the above technical solution, since a binder is required, silica sol is selected as the binder to reduce the influence of the binder on the raw material components. The silica sol decomposes into silicon dioxide under high-temperature action without harmful residues.

[0024] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is as follows: 1. By setting a granulation component, before adding the raw materials into the kiln body, the raw materials are first mixed and granulated in the process, so that the raw materials exist in the form of particles in the kiln, thus avoiding the situation that the powdery raw materials fly around when being impacted by the flame. In addition, there are larger gaps between the granular raw materials relative to the powder, avoiding the situation that only the peripheral raw materials can be melted first during the combustion of the powdery raw materials, resulting in agglomeration. At the same time, based on the fact that the flame can burn into the inside through the gaps between the raw material particles, the melting effect is improved. 2. By setting a dilution tank, the binder is first diluted and put into the mixing tank in multiple batches, thus reducing the occurrence of agglomeration; and the hollow shaft is linked with the feeding structure. During the mixing process, the measuring cylinder accumulates energy (air pressure), and at the same time, the hollow shaft extracts the binder and releases it when a certain threshold is reached, so that the binder is sprayed out from the nozzle part into the mixing tank under the action of air pressure, thus realizing the regular feeding of the binder. 3. Based on the extrusion method of the binder, the present invention also designs a valve core auxiliary rotation structure, which can drive the slide rod to move upward through the sliding sleeve during the movement of the rack, so that the swing rod swings. The hanging pin is on the central axis of the two limit posts. Before the swing rod swings past the central axis of the two limit posts, the swing rod is hindered by the tension spring when pushing, and when the swing rod swings past the position of the central axis of the two limit posts, the elastic force direction of the tension spring suddenly changes to the direction of pulling the swing rod to swing upward, so that the swing rod swings upward quickly, and drives the rack to move upward quickly through the slide rod, thereby driving the transmission gear to rotate quickly, so that the valve core can quickly rotate to a state where it is exactly opposite to the release pipe, enabling the air pressure in the upper part of the measuring cylinder to be quickly released, and at the same time avoiding the problem of the slow reset speed of the first piston plate. 4. By setting a cross-shaped die hole, the end face of the extruded particle is a columnar structure with a cross shape. The gaps between the randomly stacked particles are larger, making it easier for the flame to penetrate into the interior through the gaps between the particles, improving the combustion efficiency. 5. The present invention sets up a drying component to utilize the waste heat of the kiln for drying during the feeding process, improving energy utilization efficiency. At the same time, it can preliminarily heat the particles at a relatively low temperature. And a sintering component is set up, which can decompose the binder at the temperature that can decompose the binder, and at the same time make the particles sinter and take shape. At the same time, it can perform secondary heating on the particles and put them into the kiln after sintering is completed, so that the raw materials entering the kiln already have a certain temperature, reducing the problem of cracking and generating dust again during the high-temperature baking process. At the same time, it shortens the internal heating time of the kiln and extends the service life of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is one of the overall structural schematic diagrams of the present invention; Figure 2 is the second overall structural schematic diagram of the present invention; Figure 3 is the installation structural schematic diagram of the mixing component, granulating component, drying component and sintering component of the present invention; Figure 4 is the structural schematic diagram of the drying component of the present invention; Figure 5 is the structural schematic diagram of the mixing component and granulating component of the present invention; Figure 6 is one of the sectional structural schematic diagrams of the mixing component of the present invention; Figure 7 is the second sectional structural schematic diagram of the mixing component of the present invention; Figure 8 is the installation structural schematic diagram of the pressure rod and the fixed sleeve of the present invention; Figure 9 is the structural schematic diagram of the template of the present invention; Figure 10 is the split structural schematic diagram of the wheel core and the wheel frame of the present invention; Figure 11 is the structural schematic diagram of the wheel core of the present invention; Figure 12 of the present invention Figure 6 Enlarged view at A in; Figure 13 of the present invention Figure 7 Enlarged view at B in.

[0027] In the figure: 1, furnace body; 2, granulation component; 3, mixing tank; 4, sintering component; 5, wheel frame; 6, heat exchanger; 8, dilution tank; 9, hollow shaft; 10, spray head; 11, rotating frame; 12, mixing motor; 13, spiral stirring rod; 14, stirring blade; 15, transmission box; 16, driving motor; 17, first bevel gear; 18, second bevel gear; 19, third bevel gear; 20, turntable; 21, rocker; 22, piston cylinder; 23, third piston plate; 24, metering cylinder; 25, valve body; 26, slide rail; 27, slider; 28, rack; 29, first piston plate; 30, second piston plate; 31, linkage rod; 32, strip-shaped groove; 33, movable rod; 34, L-shaped plate; 35, push plate; 36, sliding sleeve; 37, sliding rod; 38, intake pipe; 39, fixing plate; 40, hanging pin; 41, swing rod; 43, limit post; 44, transmission gear; 45, exhaust pipe; 46, rotary joint; 48, valve core; 49, template; 50, die hole; 51, liquid extraction hole; 52, support frame; 53, wheel core; 55, feeding motor; 56, partition board; 57, pressing rod; 58, turning rod; 59, fixing sleeve; 60, pressing head; 61, trigger rod; 62, transmission buckle; 63, spiral groove; 64, discharge port; 65, dust exhaust pipe; 66, air outlet pipe; 67, discharge pipe; 68, fixing ring. Detailed implementation mode

[0028] The present invention will be further described in detail below in conjunction with embodiments: Embodiment 1

[0029] As Figure 1 - Figure 13 shown, the present invention provides a furnace for glass fiber production with multi-stage heating function, including furnace body 1; further including: a mixing component for mixing powder raw materials with diluted binder to form a mixture; a granulation component 2 arranged below the mixing component for granulating the mixture; a drying component for drying and preliminarily heating the formed granules by using the waste heat of the exhaust gas of furnace body 1; a sintering component 4 for sintering the dried granules, decomposing the binder and simultaneously completing the secondary heating of the granules.

[0030] In this embodiment, by setting the granulation component 2, before adding the raw materials into the furnace body 1, the raw materials are mixed and granulated in the process first, so that the raw materials exist in the furnace in the form of granules, thus avoiding the situation that the powdery raw materials fly around when being impacted by the flame. In addition, there are larger gaps between the granular raw materials relative to the powder, avoiding the situation that only the peripheral raw materials can be melted first during the combustion of the powdery raw materials, resulting in agglomeration. At the same time, based on the fact that the flame can burn into the inside through the gaps between the raw material granules, the melting effect is improved. Embodiment 2

[0031] As Figure 5 , Figure 6 and Figure 7 shown, on the basis of Embodiment 1, the present invention provides a technical solution: Preferably, the mixing component includes a mixing tank 3. At the top of the inner wall of the mixing tank 3, a hollow shaft 9 is rotatably connected. A rotating frame 11 is fixedly connected to the outside of the hollow shaft 9. At both ends of the rotating frame 11, mixing motors 12 are symmetrically and fixedly installed. The output ends of the mixing motors 12 are fixedly connected with spiral stirring rods 13. The lengths of the two spiral stirring rods 13 are different. A transmission box 15 is fixedly connected to the top of the mixing tank 3. The top of the hollow shaft 9 penetrates above the transmission box 15 and is fixedly connected with a rotary joint 46. A spray head 10 is installed at the bottom end of the hollow shaft 9. A driving motor 16 is fixedly installed at the top of the mixing tank 3. The output end of the driving motor 16 extends into the transmission box 15 and is fixedly connected with a first bevel gear 17. A second bevel gear 18 is fixedly connected to the outer wall of the hollow shaft 9. The second bevel gear 18 is meshed and connected with the first bevel gear 17; A dilution tank 8 is fixedly connected to the top of the inner wall of the mixing tank 3. A filling port is arranged at the top of the dilution tank 8. The hollow shaft 9 penetrates through the dilution tank 8 and is rotatably connected with the dilution tank 8. A stirring blade 14 is fixedly connected to the outer wall of the hollow shaft 9 and inside the dilution tank 8. A binder feeding structure is arranged at the top of the mixing tank 3 for periodically extracting the binder from the dilution tank 8 into the mixing tank 3. A feed pipe with an electric valve is arranged at the lower end of the mixing tank 3.

[0032] In the above technical solution, it is necessary to extrude and granulate the powdery raw materials. However, it is difficult to form stable particles only by extruding the powder. In the actual process, a binder is usually required. However, only relying on the binder, due to its concentration limitation, it is not easy to be evenly dispersed among the powders during actual operation, and it is easy to agglomerate; In this embodiment, by setting the dilution tank 8, the binder is first diluted and then periodically sprayed into the powdery raw materials, thereby reducing the occurrence of agglomeration. Specifically, the powdery raw materials are added through the feeding hopper at the top of the mixing tank 3, and the binder and water are added into the dilution tank 8 through the filling port for dilution. By controlling the driving motor 16 to work, the first bevel gear 17 is driven to rotate, and the second bevel gear 18 and the third bevel gear 19 are driven to rotate in sequence through meshing. Among them, the rotation of the second bevel gear 18 drives the hollow shaft 9 to rotate, so that the rotating frame 11 rotates. At the same time, the mixing motors 12 are controlled to work, driving the two spiral stirring rods 13 to rotate, thereby pre-mixing the powder material inside the mixing tank 3. At the same time, after the water and the binder are added into the dilution tank 8, the mixing (dilution) is completed along with the rotation of the stirring blade 14. During the powder mixing process, the diluted binder in the dilution tank 8 is periodically extracted through the feeding structure and sprayed out from the spray head 10 into the mixing tank 3 to participate in the mixing; Among them, after the binder is diluted, its viscosity decreases, and the nozzle 10 is set as an atomizing nozzle 10, so that the binder is more likely to penetrate into the interior of the powder after being ejected, greatly reducing the occurrence of agglomeration during the mixing process with the powder raw material.

[0033] As Figure 6 , Figure 7 , Figure 12 and Figure 13 shown, the feeding structure includes a metering cylinder 24 fixedly connected to the top of the mixing tank 3. A first piston plate 29 is slidably connected to the lower part of the inner wall of the metering cylinder 24, and a second piston plate 30 is slidably connected to the upper part of the inner wall of the metering cylinder 24. A linkage rod 31 is fixedly connected between the first piston plate 29 and the second piston plate 30. A strip-shaped groove 32 is provided at the middle position of the metering cylinder 24. A tension spring is fixedly connected between the bottom of the first piston plate 29 and the bottom of the inner wall of the metering cylinder 24. A valve body 25 is fixedly connected to the upper end of the metering cylinder 24. A release pipe is provided on the side of the valve body 25 away from the metering cylinder 24. A spherical valve core 48 is rotatably connected between the inner walls of the valve body 25. A through hole is provided at the middle position of the valve core 48. The central axis of the valve core 48 extends to the outside of the valve body 25 and is fixedly connected with a transmission gear 44. A slide rail 26 is fixedly connected to the outer wall of the metering cylinder 24. A slider 27 is slidably connected to the outer wall of the slide rail 26. A rack 28 is fixedly connected to one side of the slider 27. The rack 28 is meshed with the transmission gear 44; A movable rod 33 is fixedly connected to the side wall of the linkage rod 31. One end of the movable rod 33 away from the linkage rod 31 extends to the outside of the metering cylinder 24 through the strip-shaped groove 32 and is fixedly connected with an L-shaped plate 34. Two push plates 35 are fixedly connected to one side of the L-shaped plate 34; A piston cylinder 22 is fixedly connected to the top of the mixing tank 3. A third piston plate 23 is slidably connected between the inner walls of the piston cylinder 22. An air inlet pipe 38 and an air outlet pipe 45 are provided on the piston cylinder 22. Check valves are provided inside both the air inlet pipe 38 and the air outlet pipe 45. One end of the air inlet pipe 38 away from the piston cylinder 22 is communicated with the upper end of the metering cylinder 24 through a pipeline; A liquid extraction hole 51 is provided at the part of the hollow shaft 9 located inside the dilution tank 8. Check valves are provided inside the liquid extraction hole 51 and at the part of the hollow shaft 9 close to the nozzle 10. A turntable 20 is rotatably connected to one side of the transmission box 15. A rocker 21 is rotatably connected to a position deviating from the center of the side wall of the turntable 20. The bottom of the rocker 21 extends into the interior of the piston cylinder 22 and is rotatably connected to the top of the third piston plate 23. The central axis of the turntable 20 extends into the interior of the transmission box 15 and is fixedly connected with a third bevel gear 19. The third bevel gear 19 is meshed with the second bevel gear 18. The lower end of the metering cylinder 24 is communicated with the top end of the rotary joint 46 through a pipeline.

[0034] To achieve the above function of timing taking the binder, in this embodiment, a feeding structure linked to the hollow shaft 9 is provided, so that the binder can be sprayed synchronously according to the mixing degree in the mixing tank 3 (the number of rotations of the hollow shaft 9). In this embodiment, by providing a third bevel gear 19 meshing with the second bevel gear 18, the third bevel gear 19 is driven to rotate simultaneously during the rotation of the second bevel gear 18, and the turntable 20 is driven to rotate. The third piston plate 23 is driven by the rocker 21 to perform a piston motion in the piston cylinder 22. When the third piston plate 23 moves upward, a negative pressure is generated inside the piston cylinder 22. At this time, the one-way valve in the air inlet pipe 38 is conducted, and the one-way valve in the air outlet tank is blocked. The piston cylinder 22 sucks air from the upper part of the metering cylinder 24 through the air inlet pipe 38, so that the second piston plate 30 moves upward, and the first piston plate 29 is driven to move upward by the linkage rod 31. The tension spring begins to stretch and accumulate potential energy. During the upward movement of the first piston plate 29, air is sucked into the hollow shaft 9 through the pipeline and the rotary joint 46. At this time, the one-way valve inside the hollow shaft 9 is blocked while the one-way valve inside the liquid extraction hole 51 is conducted. The hollow shaft 9 extracts the binder from the dilution tank 8 through the liquid extraction hole 51. During the upward movement of the linkage rod 31, the movable rod 33 and the L-shaped plate 34 are synchronously driven to move upward, and the push plate 35 is driven to move upward. After the lower push plate 35 contacts the slider 27, the slider 27 will be lifted and the rack 28 will be driven to move upward as the above actions continue, thereby driving the transmission gear 44 to rotate, and the valve core 48 rotates accordingly until both ends of the through hole correspond to the release pipe and the inside of the metering cylinder 24 at the same time, so that the pressure in the upper part of the metering cylinder 24 is released. At this time, the first piston plate 29 moves downward under the rebound action of the tension spring, and the second piston plate 30 is driven to move downward by the linkage rod 31. During the downward movement of the first piston plate 29, air is squeezed into the hollow shaft 9, thereby squeezing out the binder accumulated inside the hollow shaft 9 downward (the one-way valve in the liquid extraction hole 51 is blocked during this process), and spraying it out from the nozzle 10 part into the mixing tank 3. During the reset process of the linkage rod 31, the movable rod 33 and the L-shaped plate 34 are synchronously driven to reset. When the upper push plate 35 contacts and presses the slider 27, the slider 27 is driven to move downward, so that the rack 28 moves downward and drives the transmission gear 44 and the valve core 48 to rotate until the through hole no longer faces the release pipe and the inside of the metering cylinder 24 at the same time, realizing the blocking, so that the upper part of the metering cylinder 24 is no longer connected to the external environment, and the metering cylinder 24 can store energy again. Embodiment 3

[0035] As Figure 7 、 Figure 12 and Figure 13As shown in the figure, based on Embodiment 2, the present invention provides a technical solution: Preferably, a fixing plate 39 is fixedly connected to the top of the mixing tank 3. A hanging pin 40 is fixedly connected to one side of the fixing plate 39. Two limiting posts 43 are fixedly connected to the side of the fixing plate 39 where the hanging pin 40 is located. A swing rod 41 is rotatably connected to the side of the fixing plate 39 where the hanging pin 40 is located. A tension spring is suspended between the end of the swing rod 41 and the hanging pin 40. Part of the rack 28 has no teeth, and a sliding sleeve 36 is inserted through the part of the rack 28 without teeth. A sliding rod 37 is fixedly connected to the end of the swing rod 41. The sliding rod 37 passes through the sliding sleeve 36 and is slidably connected to the inner wall of the sliding sleeve 36.

[0036] In the above technical solution, it is necessary to drive the valve core 48 to rotate through the movement of the linkage rod 31 to achieve conduction and blocking. However, in order to control the extrusion speed of the binder, the size of the piston cylinder 22 needs to be limited (cross-sectional area), so that the two spiral stirring rods 13 rotate more turns during the mixing process before releasing the binder once, avoiding the problem of too fast release frequency. However, the conduction of the valve core 48 needs to be driven by the above-mentioned air pressure. If the air pressure accumulates too slowly, the valve core 48 will conduct slowly and with a small amplitude. In this state, the pressure inside the metering cylinder 24 can only be released slowly, thus affecting the reset speed of the first piston plate 29 and directly slowing down the extrusion speed of the binder. In this embodiment, an auxiliary rotation structure for the valve core 48 is designed based on the extrusion method of the binder. It can drive the sliding rod 37 to move upward through the sliding sleeve 36 during the movement of the rack 28, so that the swing rod 41 swings. The hanging pin 40 is on the central axis of the two limiting posts 43. Before the swing rod 41 swings past the central axis of the two limiting posts 43, the swing rod 41 is hindered by the tension spring during the pushing process. When the swing rod 41 swings past the position of the central axis of the two limiting posts 43, the elastic force direction of the tension spring suddenly changes to the direction of pulling the swing rod 41 to swing upward, so that the swing rod 41 swings upward quickly, and drives the rack 28 to move upward quickly through the sliding rod 37, thereby driving the transmission gear 44 to rotate quickly, so that the valve core 48 can quickly rotate to a state where it is completely opposite to the release pipe, enabling the air pressure in the upper part of the metering cylinder 24 to be quickly released, and at the same time avoiding the problem of the slow reset speed of the first piston plate 29. Embodiment 4

[0037] As Figure 5 and Figure 9 As shown in the figure, based on Embodiment 3, the present invention provides a technical solution: Preferably, the granulation component 2 includes a granulator, and a template 49 is arranged at the output end of the granulator. A cross-shaped die hole 50 is opened on the template 49.

[0038] Since the powdery raw materials need to be granulated first in the solution, the granules formed by relying on traditional granulators are usually regular cylinders or spheres, and the gaps between them when stacked together are relatively small. The flame cannot penetrate through the surface raw materials into the interior, and there is still the situation of uneven heating. In this embodiment, by providing a cross-shaped die hole 50, the end face of the granule is a columnar structure in the shape of a cross when extruded. The gaps between them are larger after irregular stacking, making it easier for the flame to penetrate into the interior through the gaps between the granules, thereby improving the combustion efficiency. Embodiment 5

[0039] As Figure 4 、 Figure 10 and Figure 11 shown, on the basis of Embodiment 4, the present invention provides a technical solution: Preferably, the drying component includes a support frame 52 and a heat exchanger 6. One side of the inner wall of the support frame 52 is fixedly connected with a wheel core 53. The side of the inner wall of the support frame 52 opposite to the wheel core 53 is rotatably connected with a wheel frame 5. The wheel core 53 is slidably connected with the inner wall of the wheel frame 5. The two bottom surfaces of the wheel frame 5 are both provided with a filter screen structure. A plurality of partition plates 56 are fixedly connected to the inside of the wheel frame 5. The partition plates 56 are arranged in a ring inside the wheel frame 5. One side of the support frame 52 is fixedly installed with a feeding motor 55. The output end of the feeding motor 55 is fixedly connected with the central axis of the wheel frame 5. Two fixing rings 68 are symmetrically and fixedly connected to the top of the support frame 52. An air outlet pipe 66 is fixedly connected to the inside of the fixing ring 68. The heat exchanger 6 is communicated with the air outlet pipe 66 through a pipeline and is also communicated with the exhaust port of the kiln body 1 through a pipeline; the top of the wheel core 53 is fixedly connected with a discharge port 64. One side of the wheel core 53 is fixedly connected with a discharge pipe 67 communicated with the discharge port 64; the discharge pipe 67 is communicated with the input end of the sintering component 4. The output end of the sintering component 4 is communicated with the feeding port of the kiln body 1 through an external feeder.

[0040] Since in the above technical solution, the firmness of the raw materials just after extrusion granulation is relatively low and they are easy to disperse after being subjected to large disturbances; to ensure the efficiency of granule processing while reducing damage to the granules, the drying line is a more suitable drying method, which can dry during the conveying process and can reduce damage to the granules; but there are still some unbonded fine granules after granulation, and using a traditional drying line is likely to cause dust to fly everywhere, thus affecting the working environment. By setting a relatively rotatable wheel carrier 5 and arranging a partition 56 inside the wheel carrier 5 to divide the interior of the wheel carrier 5 into chambers of the same size, the wheel seat contacts with a position on the inner wall arc length of the wheel carrier 5 that is two-thirds, so that the particles in the corresponding chamber cannot fall out when the wheel carrier 5 rotates to the position in contact with the wheel seat; specifically, by controlling the feeding motor 55 to work, driving the wheel carrier 5 to rotate, the particles are conveyed along with the rotation of the wheel carrier 5 until they are conveyed to directly above the wheel seat. At this time, the particles fall into the discharge port 64 and then fall into the sintering component 4 through the discharge pipe 67. Among them, the sintering component 4 is a rotary furnace, which can sinter the particles. The sintering temperature is higher than the drying temperature and lower than the internal temperature of the kiln. On the one hand, it can decompose the binder. On the other hand, it can perform secondary heating on the raw materials to avoid cracking of the raw materials during the sintering process and generating powder. Among them, part of the heat source of the rotary furnace can be provided by the waste heat recovery of the kiln, and a compensation heating structure is additionally arranged inside it to ensure that the temperature reaches the sintering temperature; During the above process of feeding the particles along with the rotation of the wheel carrier 5, the wheel carrier 5 is blown by the air outlet pipe 66 to dry the particles in the chamber. The air outlet pipe 66 is communicated with the air outlet of the heat exchanger 6. The heat source input end of the heat exchanger 6 is communicated with the exhaust port of the kiln. During the operation of the kiln, its flue gas waste heat heats the air input into the heat exchanger 6 through heat exchange and discharges it to the air outlet pipe 66, so as to provide hot air to dry the particles and perform primary heating at the same time, avoiding cracking caused by sudden high temperature melting or sintering, and also avoiding the problem that a large amount of water vapor is generated during drying inside the kiln and affecting the melting effect.

[0041] As Figure 4 、 Figure 8 and Figure 10 shown, preferably, a plurality of fixed sleeves 59 are connected through the side wall of the wheel carrier 5. The inner walls of the fixed sleeves 59 are all slidably connected with pressure rods 57. One end of the pressure rod 57 is fixedly connected with a hemispherical pressure head 60. The end of the pressure rod 57 away from the pressure head 60 extends into the wheel carrier 5. A spiral groove 63 is formed on the outer wall of the pressure rod 57. A transmission buckle 62 is fixedly connected to the inner side of the fixed sleeve 59. The transmission buckle 62 is slidably connected with the spiral groove 63. A spring is sleeved outside the pressure rod 57 and between the sliding sleeve 36 and the pressure head 60. A plurality of trigger rods 61 are fixedly connected between the two fixed rings 68 on the side close to each other. A material turning rod 58 is fixedly connected to the side wall of the pressure rod 57 inside the wheel carrier 5.

[0042] The raw materials need to rely on the rotation of the wheel frame 5 to convey the granular raw materials, and at the same time, drying is carried out during the conveying process. To improve the drying effect, in this solution, a pressure rod 57 that can move axially and synchronously in the circumferential direction is also provided, which cooperates with the material turning rod 58 to make the raw material drying process more uniform. Specifically, during the rotation of the wheel frame 5, the pressure head 60 intermittently contacts and squeezes with the trigger rod 61. Under the squeezing action, the pressure rod 57 moves axially, squeezing the spring. At the same time, along with the axial movement of the pressure rod 57, the spiral groove 63 and the transmission buckle 62 cooperate to make the pressure rod 57 rotate circumferentially at the same time, so that the material turning rod 58 turns the raw material particles. After the pressure head 60 passes the pressure rod 57, the pressure head 60 resets under the action of the spring rebound.

[0043] As Figure 10 and Figure 11 shown, preferably, the inside of the wheel core 53 is set as a hollow structure, the bottom of the discharge port 64 is provided with filter holes, and the bottom of the wheel core 53 is provided with a dust exhaust pipe 65.

[0044] During the drying process, there are some small-sized debris. The debris enters the discharge port 64 along with the particles and is screened. The small-sized debris falls into the wheel core 53 through the filter holes and is discharged from the dust exhaust pipe 65, while the large particles are sent out through the discharge pipe 67. Embodiment 6

[0045] On the basis of Embodiment 1, the present invention provides a technical solution: preferably, the binder is silica sol.

[0046] Since a binder needs to be used, in order to reduce the influence of the binder on the raw material components, silica sol is selected as the binder. Silica sol decomposes into silica (a component of glass fiber) after being heated at 850 - 900 °C for 15 - 20 minutes, without harmful residues. It should be noted particularly that during the operation process, the usage amount of the silica raw material needs to be correspondingly reduced according to the usage amount of the binder.

[0047] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, the modifications or improvements made without departing from the spirit of the present invention are all within the protection scope of the present invention.

Claims

1. A furnace for glass fiber production with multi-stage heating function, comprising a furnace body (1); characterized in that, It further includes: a mixing component for mixing powder raw materials with a diluted binder to form a mixture; a granulating component (2) arranged below the mixing component for granulating the mixture; a drying component for drying and preliminarily heating the formed granules by using the waste heat of the exhaust gas of the kiln body (1); a sintering component (4) for sintering the dried granules to decompose the binder and simultaneously complete the secondary heating of the granules; The mixing component includes a mixing tank (3). The top of the inner wall of the mixing tank (3) is rotatably connected with a hollow shaft (9). A rotating frame (11) is fixedly connected to the outside of the hollow shaft (9). Mixing motors (12) are symmetrically and fixedly installed at both ends of the rotating frame (11). The output ends of the mixing motors (12) are fixedly connected with spiral stirring rods (13). A transmission box (15) is fixedly connected to the top of the mixing tank (3). A driving motor (16) is fixedly installed at the top of the mixing tank (3). The output end of the driving motor (16) extends into the interior of the transmission box (15) and is fixedly connected with a first bevel gear (17). A second bevel gear (18) is fixedly connected to the outer wall of the hollow shaft (9). The second bevel gear (18) is meshed with the first bevel gear (17).

2. The glass fiber production furnace with multi-stage heating function according to claim 1, characterized in that: The mixing component further includes a dilution tank (8). The dilution tank (8) is fixedly connected to the top of the inner wall of the mixing tank (3). A filling port is arranged at the top of the dilution tank (8). The top of the hollow shaft (9) penetrates above the transmission box (15) and is fixedly connected with a rotary joint (46). A spray head (10) is installed at the bottom end of the hollow shaft (9). The hollow shaft (9) penetrates through the dilution tank (8) and is rotatably connected with the dilution tank (8). Stirring blades (14) are fixedly connected to the outer wall of the hollow shaft (9) and inside the dilution tank (8). A binder feeding structure is arranged at the top of the mixing tank (3) for regularly extracting the binder from the dilution tank (8) into the mixing tank (3). A feed pipe with an electric valve is arranged at the lower end of the mixing tank (3); The lengths of the two spiral stirring rods (13) are different.

3. The glass fiber production furnace with multi-stage heating function according to claim 2, characterized in that: The feeding structure includes a metering cylinder (24) fixedly connected to the top of the mixing tank (3). A first piston plate (29) is slidably connected to the lower part of the inner wall of the metering cylinder (24), and a second piston plate (30) is slidably connected to the upper part of the inner wall of the metering cylinder (24). A linkage rod (31) is fixedly connected between the first piston plate (29) and the second piston plate (30). A strip-shaped groove (32) is provided at the middle position of the metering cylinder (24). A tension spring is fixedly connected between the bottom of the first piston plate (29) and the bottom of the inner wall of the metering cylinder (24). A valve body (25) is fixedly connected to the upper end of the metering cylinder (24). A release pipe is provided on the side of the valve body (25) away from the metering cylinder (24). A spherical valve core (48) is rotatably connected between the inner walls of the valve body (25). A through hole is provided at the middle position of the valve core (48). The central axis of the valve core (48) extends to the outside of the valve body (25) and is fixedly connected with a transmission gear (44). A slide rail (26) is fixedly connected to the outer wall of the metering cylinder (24). A slider (27) is slidably connected to the outer wall of the slide rail (26). A rack (28) is fixedly connected to one side of the slider (27). The rack (28) is meshed with the transmission gear (44). A movable rod (33) is fixedly connected to the side wall of the linkage rod (31). The end of the movable rod (33) away from the linkage rod (31) extends to the outside of the metering cylinder (24) through the strip-shaped groove (32) and is fixedly connected with an L-shaped plate (34). Two push plates (35) are fixedly connected to one side of the L-shaped plate (34). A piston cylinder (22) is fixedly connected to the top of the mixing tank (3). A third piston plate (23) is slidably connected between the inner walls of the piston cylinder (22). An air inlet pipe (38) and an air outlet pipe (45) are provided on the piston cylinder (22). Check valves are provided inside both the air inlet pipe (38) and the air outlet pipe (45). The end of the air inlet pipe (38) away from the piston cylinder (22) is communicated with the upper end of the metering cylinder (24) through a pipeline. A liquid extraction hole (51) is provided at the part of the hollow shaft (9) located inside the dilution tank (8). Check valves are provided inside both the liquid extraction hole (51) and the part of the hollow shaft (9) near the spray head (10). A turntable (20) is rotatably connected to one side of the transmission box (15). A rocker (21) is rotatably connected to a position deviating from the center of the side wall of the turntable (20). The bottom of the rocker (21) extends into the inside of the piston cylinder (22) and is rotatably connected to the top of the third piston plate (23). The central axis of the turntable (20) extends into the inside of the transmission box (15) and is fixedly connected with a third bevel gear (19). The third bevel gear (19) is meshed with the second bevel gear (18). The lower end of the metering cylinder (24) is communicated with the top end of the rotary joint (46) through a pipeline.

4. A glass fiber production furnace with multi-stage heating function according to claim 3, characterized in that: A fixed plate (39) is fixedly connected to the top of the mixing tank (3). A hanging pin (40) is fixedly connected to one side of the fixed plate (39). Two limit posts (43) are fixedly connected to the side of the fixed plate (39) where the hanging pin (40) is located. A swing rod (41) is rotatably connected to the side of the fixed plate (39) where the hanging pin (40) is located. A tension spring is suspended between the end of the swing rod (41) and the hanging pin (40). Part of the rack (28) has no teeth, and a sliding sleeve (36) is inserted through the part of the rack (28) without teeth. A sliding rod (37) is fixedly connected to the end of the swing rod (41). The sliding rod (37) passes through the sliding sleeve (36) and is slidably connected to the inner wall of the sliding sleeve (36).

5. A glass fiber production furnace with multi-stage heating function according to claim 4, characterized in that: The granulation component (2) includes a granulator. A template (49) is provided at the output end of the granulator. A cross-shaped die hole (50) is formed in the template (49).

6. A furnace for glass fiber production with multi-stage heating function according to claim 5, characterized in that: The drying component includes a support frame (52) and a heat exchanger (6). A wheel core (53) is fixedly connected to one side of the inner wall of the support frame (52). A wheel frame (5) is rotatably connected to the side of the inner wall of the support frame (52) opposite to the wheel core (53). The wheel core (53) is slidably connected to the inner wall of the wheel frame (5). The two bottom surfaces of the wheel frame (5) are both of a filter screen structure. A plurality of partition plates (56) are fixedly connected to the inside of the wheel frame (5). The partition plates (56) are arranged in a ring inside the wheel frame (5). A feeding motor (55) is fixedly installed on one side of the support frame (52). The output end of the feeding motor (55) is fixedly connected to the central axis of the wheel frame (5). Two fixing rings (68) are symmetrically and fixedly connected to the top of the support frame (52). An air outlet pipe (66) is fixedly connected to the inside of the fixing ring (68). The heat exchanger (6) is connected to the air outlet pipe (66) through a pipeline and is also connected to the exhaust port of the kiln body (1) through a pipeline; A discharge port (64) is fixedly connected to the top of the wheel core (53). A discharge pipe (67) communicating with the discharge port (64) is fixedly connected to one side of the wheel core (53); The discharge pipe (67) is connected to the input end of the sintering component (4). The output end of the sintering component (4) is connected to the feeding port of the kiln body (1) through an external feeder.

7. A glass fiber production furnace with multi-stage heating function according to claim 6, characterized in that: A plurality of fixing sleeves (59) are connected through the side wall of the wheel carrier (5). The inner walls of the fixing sleeves (59) are all slidably connected with pressing rods (57). One end of each pressing rod (57) is fixedly connected with a hemispherical pressing head (60). The end of the pressing rod (57) far from the pressing head (60) extends into the wheel carrier (5). A spiral groove (63) is formed in the outer wall of the pressing rod (57). A transmission buckle (62) is fixedly connected to the inner side of the fixing sleeve (59). The transmission buckle (62) is slidably connected with the spiral groove (63). A spring is sleeved on the outer part of the pressing rod (57) between the sliding sleeve (36) and the pressing head (60). A plurality of trigger rods (61) are fixedly connected between the closer sides of the two fixing rings (68). A material turning rod (58) is fixedly connected to the side wall of the pressing rod (57) inside the wheel carrier (5).

8. A glass fiber production furnace with multi-stage heating function according to claim 7, characterized in that: The inside of the wheel core (53) is arranged as a hollow structure. The bottom of the material outlet (64) is provided with filter holes. A dust exhaust pipe (65) is arranged at the bottom of the wheel core (53).

9. A glass fiber production furnace with multi-stage heating function according to claim 1, characterized in that: The binder is silica sol.

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