Microcrystal glass fiber production system composition

Abstract

The utility model provides a microcrystalline glass fiber production system composition which comprises a feeding system, a heat exchange tower, a melting furnace, a microcrystalline glass fiber preparation tower and a conveying belt which are sequentially communicated, the top of the heat exchange tower is connected with a flue gas dust collection system, and the side wall of the bottom of the heat exchange tower is provided with a first flue gas inlet and a second flue gas inlet. The first flue gas inlet is connected to the top of the melting furnace through a first flue gas pipeline, the second flue gas inlet is connected to the top of the microcrystalline glass fiber preparation tower through a second flue gas pipeline, and the flue gas dust collection system enables the heat exchange tower to generate negative pressure. High-temperature flue gas and high-temperature air generated by the melting furnace and the microcrystalline glass fiber preparation tower are absorbed into the heat exchange tower through the first flue gas pipeline and the second flue gas pipeline, initial materials are preheated, energy released in the heat release process is recycled, energy is fully utilized, actual energy consumption is only 55%-65% of theoretical energy consumption, the energy-saving effect is obvious, and the energy-saving effect is good. The method has great economic value, and the production cost of the microcrystalline glass fiber is reduced.

Description

Technical Field

[0001] The utility model relates to the field of microcrystalline glass fiber production, in particular to a microcrystalline glass fiber production system structure. Background Art

[0002] Microcrystalline glass fiber is obtained by fiberizing molten glass. After further processing, microcrystalline glass fiber can be made into a series of products with multiple uses, which can be widely used in the fields of construction, chemical industry, electronics, electricity, metallurgy, energy, transportation, etc.

[0003] In the production and processing of microcrystalline glass fiber, melting energy consumption is the main component of process cost, accounting for about 50% to 70% of the total production cost. From the raw material to the microcrystalline glass fiber, the chemical energy change process, according to the thermodynamic analysis of the chemical energy of the material, it can be known that: compared with the chemical energy of the microcrystalline glass fiber, the chemical energy of the raw material is basically unchanged during the heat absorption process of heating, solid state to fluid state phase change, and the heat release process of melting state to solid state phase change, and solid state to room temperature, except for the removal of adsorbed water and crystallization water from the raw material, and the absorption of a small amount of energy by the decomposition of a small amount of carbonate. That is, the energy consumed from heating to melting and the energy released from cooling the molten state to fiberizing to room temperature are theoretically basically the same.

[0004] Therefore, if the energy released in the exothermic process can be recovered and used in the endothermic process, a lot of energy can be saved. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides a microcrystalline glass fiber production system, including a feeding system, a first feeding port is arranged at the top of a heat exchange tower, and is connected to the feeding system, a second discharging port is arranged at the bottom of the heat exchange tower, and is connected to a melting furnace, a third discharging port is arranged at the bottom of the melting furnace, and is connected to the top of a microcrystalline glass fiber preparation tower, an air inlet slit and a fourth discharging port are arranged at the bottom of the microcrystalline glass fiber preparation tower, and a conveyor belt is arranged below the fourth discharging port, characterized in that: a flue gas dust collection system is connected to the top of the heat exchange tower, a first flue gas inlet and a second flue gas inlet are arranged on the bottom side wall of the heat exchange tower, the first flue gas inlet is connected to the top of the melting furnace through a first flue gas duct, and the second flue gas inlet is connected to the top of the microcrystalline glass fiber preparation tower through a second flue gas duct, the flue gas dust collection system generates negative pressure in the heat exchange tower, and absorbs high-temperature flue gas and high-temperature air generated by the melting furnace and the microcrystalline glass fiber preparation tower into the heat exchange tower through the first flue gas duct and the second flue gas duct.

[0006] Specifically, the heat exchange tower is provided with multiple layers of first material guide plates which are arranged in opposite directions and are inclined.

[0007] Specifically, a material buffer tank is arranged at the bottom of the heat exchange tower, a second discharge port is arranged at the bottom of the material buffer tank, and a second quantitative feeder is arranged at the second discharge port.

[0008] Specifically, the flue gas dust collection system includes an induced draft fan and a bag-type dust collector. The induced draft fan is connected to the bag-type dust collector to generate a negative pressure of 1 kPa-2 kPa in the heat exchange tower. A dust collecting pipe is provided on the top of the heat exchange tower. The air inlet end of the bag-type dust collector is connected to the heat exchange tower through the dust collecting pipe. A dust discharge pipe is provided at the bottom of the bag-type dust collector, and the dust discharge pipe is connected to the heat exchange tower.

[0009] Specifically, a melt guide pipe is provided at the third discharge port, and the melt guide pipe is in an inverted U shape.

[0010] Specifically, a high-speed material-throwing disc is arranged on the upper part of the microcrystalline glass fiber preparation tower, a water-cooled wall is arranged on the tower body, and multiple layers of reversely inclined second material guide plates are arranged below the water-cooled wall.

[0011] Specifically, the feeding system includes an aggregate pool, which is arranged at a low position. The feed end of the bucket elevator is connected to the aggregate pool, and the output end of the bucket elevator is connected to a feeding storage tank arranged at a high position. A first discharge port is arranged at the bottom of the feeding storage tank, and a first quantitative feeder is arranged at the first discharge port.

[0012] Specifically, the inclination angle of the first material guide plate is 25°-35°.

[0013] Specifically, the inclination angle of the second material guide plate is 10°-20°.

[0014] The beneficial effects of the utility model are:

[0015] The utility model designs a heat exchange tower, and the flue gas dust collection system transports the high-temperature flue gas generated by heating the melting furnace and the high-temperature air obtained by heat exchange and heating of the microcrystalline glass fiber by the microcrystalline glass fiber preparation tower to the heat exchange tower, so as to preheat the initial material, recover the energy released in the exothermic process, and make full use of the energy. The actual energy consumption is only 55% to 65% of the theoretical energy consumption, with obvious energy-saving effect, great economic value, and significantly reducing the production cost of the microcrystalline glass fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a system structure diagram of the utility model.

[0017] Figure numerals: 1. feeding system; 11. collecting pool; 12. bucket elevator; 13. storage tank; 14. first quantitative feeder; 2. heat exchange tower; 21. first flue gas inlet; 22. second flue gas inlet; 23. material buffer tank; 24. second quantitative feeder; 25. first guide plate; 26. dust collection duct; 3. melting furnace; 31. melting pool; 32. melt guide pipe; 33. first flue gas duct; 4. microcrystalline glass fiber preparation tower; 41. high-speed throwing disc; 42. water-cooled wall; 43. second guide plate; 44. fourth discharge port; 45. second flue gas duct; 46. air inlet gap; 5. conveyor belt; 6. flue gas dust collection system; 61. bag filter; 62. dust discharge pipe; 63. induced draft fan; 64. purified flue gas discharge pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The specific implementation of the utility model is described in detail below in combination with specific embodiments.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connection" and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0020] like Figure 1 As shown, a microcrystalline glass fiber production system is composed of: a feeding system 1, a heat exchange tower 2, a melting furnace 3, a microcrystalline glass fiber preparation tower 4, a conveyor belt 5 and a flue gas dust collection system 6. The feeding system 1, the heat exchange tower 2, the melting furnace 3, the microcrystalline glass fiber preparation tower 4 and the conveyor belt 5 are connected in sequence.

[0021] The feeding system 1 includes a collection pool 11, which is set at a low position. The feeding end of the bucket elevator 12 is connected to the collection pool 11, and the output end of the bucket elevator 12 is connected to the feeding storage tank set at a high position, so that the initial material is transported from the collection pool 11 at a low position to the storage tank 13 at a high position. A first discharge port is set at the bottom of the feeding storage tank, and a first quantitative feeder 13 is set at the first discharge port. The first quantitative feeder 13 can be a vibrating feeder or a screw feeder, etc., which quantitatively transports the initial material to the heat exchange tower 2.

[0022] A first feed port is provided at the top of the heat exchange tower 2, a material buffer tank 23 is provided at the bottom of the heat exchange tower 2, a second discharge port is provided at the bottom of the material buffer tank 23, and a second quantitative feeder 24 is provided at the second discharge port. The second quantitative feeder 24 can be a vibrating feeder or a screw feeder, etc., which quantitatively transports the preheated material to the heat exchange tower 2.

[0023] A first flue gas inlet 21 and a second flue gas inlet 22 are provided on the side wall of the heat exchange tower 2. The first flue gas inlet 21 is connected to the melting furnace 3 through a first flue gas duct 33 to recover a small amount of high-temperature flue gas generated by combustion in the melting furnace 3, wherein the high-temperature flue gas includes air adsorbed on the surface of the material transported to the melting furnace 3, residual crystalline water from preheating, and gas generated by heating (such as carbon dioxide generated by thermal decomposition of carbonate); the second flue gas inlet 22 is connected to the microcrystalline glass fiber preparation tower 4 through a second flue gas duct 45 to recover the high-temperature air generated in the process of cooling the microcrystalline glass fiber by the microcrystalline glass fiber preparation tower 4. The high-temperature air enters from the air inlet slit 46 of the microcrystalline glass fiber preparation tower 4 and is heated by heat exchange with the microcrystalline glass fiber. When the molten microcrystalline glass fiber enters the microcrystalline glass fiber preparation tower 4, the temperature is 1100°C-1300°C. The molten microcrystalline glass fiber exchanges heat with the air during the phase change process and the cooling process, releasing a large amount of heat to generate high-temperature air. The temperature of the high-temperature flue gas and high-temperature air is about 500°C, which preheats the initial material at room temperature to 350°C-450°C, removes moisture from the initial material and partially decomposes crystal water and carbonate.

[0024] A plurality of first material guide plates 25 are arranged in the heat exchange tower 2. The first material guide plates 25 are arranged to be tilted in the opposite direction, and the tilt angle is preferably 25-35 degrees. The initial material slides layer by layer along the first material guide plates 25 into the material buffer pool 23. During the sliding process of the material, the heat is absorbed to preheat the material. The preheated material is accumulated in the material buffer pool 23. After the storage amount in the material buffer pool 23 reaches the set value, it is transported to the melting furnace 3 by the second quantitative feeder 24.

[0025] The flue gas dust collection system 6 includes an induced draft fan 63 and a bag filter 61, the induced draft fan 63 is connected to the bag filter 61, a dust collection pipe 26 is arranged at the top of the heat exchange tower 2, the air inlet end of the bag filter 61 is connected to the heat exchange tower 2 through the dust collection pipe 26, and a dust discharge pipe 62 is arranged at the bottom of the bag filter 61, and the dust discharge pipe 62 is connected to the heat exchange tower 2. The bag filter 61 removes dust from the flue gas, and the induced draft fan 63 discharges the dust-removed and purified flue gas from the exhaust gas discharge pipe. At the same time, the induced draft fan 63 generates a certain negative pressure in the heat exchange tower 2, and the negative pressure is preferably 1kPa-2kPa. Under the attraction of the negative pressure, the second flue gas inlet 22 and the first flue gas inlet 21 of the heat exchange tower 2 absorb high-temperature air and high-temperature flue gas from the microcrystalline glass fiber preparation tower 4 and the melting furnace 3 respectively. After the high-temperature air and high-temperature flue gas are cooled by heat exchange with the material from bottom to top, they enter the bag filter 61 through the dust collecting pipe 26, and are discharged to the outside through the purified flue gas discharge pipe 64 after dust removal. The flue gas will be mixed with material dust and microcrystalline glass fiber dust. After the dust is filtered by the bag filter 61, it will re-enter the heat exchange tower 2 through the dust discharge pipe 62, reducing material loss and fully recycling the material.

[0026] A second feed port is provided on the top side wall of the melting furnace 3, a melting pool 31 is provided in the melting furnace 3, the preheated material is transported to the melting pool 31 by the second quantitative feeder 24, a third discharge port is provided on the bottom side wall of the melting pool 31, a melt guide pipe 32 is provided at the third discharge port, and the melt guide pipe 32 is an inverted U-shaped structure. The molten material enters the melt guide pipe 32 from the bottom of the melting pool 31, and is transported to the microcrystalline glass fiber preparation tower 4 through the melt guide pipe 32. By controlling the height of the inverted U-shaped melt guide tube 32, the height of the molten material in the melt pool 31 of the melting furnace 3, the pressure applied to the surface of the molten material by the solid material floating on the top of the molten material, the heating power of the electric heater in the melt pool 31, and the material feeding speed of the second quantitative feeder 24 into the melting furnace 3, the molten material in the melt pool 31 of the melting furnace 3 is controlled to flow out stably and continuously through the melt guide tube 32, and the outflow amount matches the amount of material added into the melting furnace 3 by the quantitative feeder.

[0027] A third feed port is arranged at the top center of the microcrystalline glass fiber preparation tower 4, and the third feed port is connected to the melt guide tube 32. A high-speed material throwing disc 41 is arranged below the third feed port, a water-cooled wall 42 is arranged on the tower body, and a multi-layer inclined second material guide plate 43 is arranged below the water-cooled wall 42. The inclination angle of the second material guide plate 43 is preferably 10-20°. A fourth discharge port 44 and an air inlet slit 46 are arranged at the bottom of the microcrystalline glass fiber preparation tower 4, and air enters the microcrystalline glass fiber preparation tower 4 from the air inlet slit 46. The molten material fed from the melt guide pipe 32 drips into the high-speed material throwing disc 41. The high-speed material throwing disc 41 rotates at a high speed to centrifugally throw out the molten material, forming continuous and fine streamline droplets to the water-cooled wall 42 of the tower body, which are quickly cooled into solid to obtain microcrystalline glass fibers. The microcrystalline glass fibers rely on gravity to fall from the water-cooled wall 42 of the tower body into the second guide plate 43 group and continue to move downward. The microcrystalline glass slides down layer by layer along the second guide plate 43 and exchanges heat with the air entering through the air inlet slit 46, further cooling down, and finally discharged from the fourth discharge port 44. At the top of the microcrystalline glass fiber preparation tower 4, a second flue gas duct 45 is provided. The second flue gas duct 45 generates negative pressure under the action of the induced draft fan 63, continuously absorbing the heat emitted by the microcrystalline glass fibers in contact with the water-cooled wall 42 and the heat generated by the microcrystalline glass fibers exchanging heat with the air during the downward movement of the first guide plate 25, and transporting them to the heat exchange tower 2.

[0028] A conveyor belt 5 is provided at the bottom of the fourth discharge port 44 to receive the discharged microcrystalline glass fibers and convey them out.

[0029] When in use, the materials are mixed evenly to obtain initial materials, and are put into the aggregate pool 11. The bucket elevator 12 transports the materials in the lower aggregate pool 11 to the higher storage tank 13, and the initial materials are quantitatively transported to the heat exchange tower 2 through the first quantitative feeder 14. The initial materials slide down layer by layer along the first guide plate 25, and exchange heat with the high-temperature flue gas generated by the combustion of the melting furnace 3 and the high-temperature air generated in the process of cooling the microcrystalline glass fiber by the microcrystalline glass fiber preparation tower 4, absorb heat to preheat the initial materials, and obtain preheated materials. The preheated materials are accumulated in the material buffer pool 23. After the storage capacity in the material buffer pool 23 reaches the set value, the first material buffer pool 23 is used to store the initial materials. The two quantitative feeders 24 convey the material to the melting furnace 3, melt it at a high temperature, and obtain a molten material. The molten material flows out through the melt guide pipe 32 at the bottom of the melting furnace and is conveyed to the top of the microcrystalline glass fiber preparation tower 4. The high-speed material throwing disc 41 centrifugally throws the molten material out at a high speed to the tower water-cooled wall 42 of the microcrystalline glass fiber preparation tower 4, and quickly cools it into solid microcrystalline glass fiber. The microcrystalline glass fiber falls from the tower water-cooled wall 42 to the second material guide plate 43 by gravity and moves downward layer by layer along the second material guide plate 43. The microcrystalline glass fiber exchanges heat with the air and is further cooled down. It is discharged from the fourth discharge port 44 and sent to the conveyor belt to transport the microcrystalline glass fiber out.

[0030] Example

[0031] Taking the production line of 240,000 tons of microcrystalline glass fiber per year as an example, the daily output is about 800 tons / day, and the hourly output is 33.33 tons. The initial material melting weight loss after the microcrystalline glass fiber composition of the production line is set to 10% (including adsorbed water, crystallization water, and carbonate decomposition), and the initial addition amount is 36.66 tons / hour. For 36.66 tons of initial material, the theoretical heating energy consumption is 15.42MW / h.

[0032] Using this technical solution, the energy balance relationship of the whole system is as follows:

[0033] 500℃, 9.69MW high-temperature air is input into the heat exchange tower. 36.66 tons / hour of initial material at room temperature (20℃) is preheated through the heat exchange tower to obtain 33.33 tons / hour of preheated material. The preheated material absorbs 4.14MW of high-temperature air energy; air emissions carry 2.96MW of energy, water vapor and carbon dioxide emissions carry 2.26MW of energy, and 0.32MW of energy is dissipated, consuming a total of 5.54MW of energy.

[0034] The preheated material enters the melting furnace, and the melting furnace electric heater inputs 9.01MW of electric energy during the heating process, heating the preheated material to 1200℃, and dissipates 0.43MW of energy during the heating process. The energy in the molten material includes 4.14MW of energy absorbed by preheating and 8.58MW of electric energy absorbed, a total of 12.72MW of energy.

[0035] The molten material is input into the microcrystalline glass preparation tower, where it is cooled by heat exchange with the air, generating 500°C high-temperature air containing a total energy of 10.57MW, which is transported to the heat exchange tower, dissipating 0.88MW of energy during transportation; during the cooling process, 0.37MW of energy is dissipated, the fiber carries 1.78MW of energy, and water cooling consumes 0.53MW of energy, for a total of 2.68MW of energy.

[0036]

[0037] It can be seen from the above that by adopting the technical solution provided by the utility model, the actual energy consumption is only 58.46% of the theoretical energy consumption, the energy-saving effect is very obvious, and it is of great economic value.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A microcrystalline glass fiber production system, comprising a feeding system (1), a first feeding port is provided at the top of a heat exchange tower (2), and is connected to the feeding system (1), a second discharging port is provided at the bottom of the heat exchange tower (2), and is connected to a melting furnace (3), a third discharging port is provided at the bottom of the melting furnace (3), and is connected to the top of a microcrystalline glass fiber production tower (4), an air inlet slit (46) and a fourth discharging port (44) are provided at the bottom of the microcrystalline glass fiber production tower (4), and a conveyor belt (5) is provided below the fourth discharging port, characterized in that: A flue gas dust collection system (6) is connected to the top of the heat exchange tower (2), and a first flue gas inlet (21) and a second flue gas inlet (22) are provided on the bottom side wall of the heat exchange tower (2). The first flue gas inlet (21) is connected to the top of the melting furnace (3) through a first flue gas duct (33), and the second flue gas inlet (22) is connected to the top of the microcrystalline glass fiber production tower (4) through a second flue gas duct (45). The flue gas dust collection system (6) generates negative pressure in the heat exchange tower (2), and absorbs high-temperature flue gas and high-temperature air generated by the melting furnace (3) and the microcrystalline glass fiber production tower (4) into the heat exchange tower (2) through the first flue gas duct (33) and the second flue gas duct (45).

2. The microcrystalline glass fiber production system according to claim 1 is characterized in that: The heat exchange tower (2) is provided with multiple layers of first material guide plates (25) arranged in opposite directions and tilted.

3. The microcrystalline glass fiber production system according to claim 1 is characterized in that: A material buffer pool (23) is arranged at the bottom of the heat exchange tower (2), a second discharge port is arranged at the bottom of the material buffer pool (23), and a second quantitative feeder (24) is arranged at the second discharge port.

4. The microcrystalline glass fiber production system according to claim 1 is characterized in that: The flue gas dust collection system (6) comprises an induced draft fan (63) and a bag dust collector (61); the induced draft fan (63) is connected to the bag dust collector (61) so that a negative pressure of 1 kPa-2 kPa is generated in the heat exchange tower (2); a dust collection pipe (26) is arranged at the top of the heat exchange tower (2); an air inlet end of the bag dust collector (61) is connected to the heat exchange tower (2) via the dust collection pipe (26); a dust discharge pipe (62) is arranged at the bottom of the bag dust collector (61); and the dust discharge pipe (62) is connected to the heat exchange tower (2).

5. The microcrystalline glass fiber production system according to claim 1 is characterized in that: A melt guide pipe (32) is provided at the third discharge port, and the melt guide pipe (32) is in an inverted U shape.

6. The microcrystalline glass fiber production system according to claim 1 is characterized in that: The upper part of the microcrystalline glass fiber preparation tower (4) is provided with a high-speed material throwing disc (41), the tower body is provided with a water-cooled wall (42), and a plurality of second material guide plates (43) arranged in opposite directions and inclined are provided below the water-cooled wall (42).

7. The microcrystalline glass fiber production system according to claim 1 is characterized by: The feeding system (1) comprises a collection pool (11), the collection pool (11) is arranged at a low position, the feeding end of the bucket elevator (12) is connected to the collection pool (11), the output end of the bucket elevator (12) is connected to a feeding storage tank arranged at a high position, a first discharge port is arranged at the bottom of the feeding storage tank, and a first quantitative feeder (13) is arranged at the first discharge port.

8. The microcrystalline glass fiber production system according to claim 2, characterized in that: The inclination angle of the first material guide plate (25) is 25°-35°.

9. The microcrystalline glass fiber production system according to claim 6, characterized in that: The inclination angle of the second material guide plate (43) is 10°-20°.

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