Inorganic fiber product processing system

Abstract

This invention provides an inorganic fiber processing system and an inorganic fiber processing method that can remove binders contained in inorganic fiber products. [Solution] The inorganic fiber product processing system 10 is an inorganic fiber product processing system for processing an object to be processed which is an inorganic fiber product, and comprises a first processing unit 32 that heats the crushed object to be processed using superheated steam, and a second processing unit 33 that exposes the object processed in the first processing unit 32 to an oxygen-containing gas, wherein the second processing unit 33 is located at a lower position than the first processing unit 32.

Description

Technical Field

[0001] The present invention relates to an inorganic fiber product processing system.

Background Art

[0002] Patent Document 1 describes an inorganic fiber product processing system capable of removing a binder contained in an inorganic fiber product. This inorganic fiber product processing system includes a pulverizing device that pulverizes press scraps of glass wool products so that the particle size is 0.3 mm or less and the bulk specific gravity is 0.5 ton / m 3 or more, a weighing hopper into which the press scraps pulverized by the pulverizing device are introduced, a superheated steam generating device that generates superheated steam, a predetermined amount of press scraps are introduced from the weighing hopper, and the introduced press scraps are heated at 400 to 600 °C using superheated steam introduced from the superheated steam generating device, and a rotary kiln that discharges the processed press scraps and exhaust gas, a deodorizing device that reduces the odor of the exhaust gas discharged from the rotary kiln using superheated steam of 800 °C or higher, a first heat exchanger for cooling the exhaust gas discharged from the deodorizing device, a second heat exchanger for further cooling the exhaust gas that has passed through the first heat exchanger, and a purification device for removing dust contained in the exhaust gas that has passed through the second heat exchanger. The air heated by cooling the exhaust gas in the first heat exchanger is supplied to the rotary kiln, the amount of air supplied to the rotary kiln is 1.0 to 1.3 times the theoretical combustion air amount of the binder contained in the press scraps, and the speed of the air flow generated inside the rotary kiln is suppressed to 2.0 m / sec or less.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention Compared to inorganic fiber processing systems using rotary kilns, the installation area is significantly reduced. The objective is to provide an inorganic fiber product processing system. [Means for solving the problem]

[0005] The invention described in claim 1 is, Inorganic fiber products in which glass wool, rock wool, or ceramic wool are bound together with a binder. An inorganic fiber product processing system for processing a material to be processed, A grinding unit for grinding the material to be processed, a storage unit for storing the material ground in the grinding unit, and a supply from the storage unit Items to be processed to , superheated steam Spray and stir The first processing unit, A first opening / closing device that can open and close a passage for discharging the processed material processed in the first processing unit, The first processing unit is located below the first processing unit, It fell through the first opening and closing device. Items to be processed to , an oxygen-containing gas heated to 500-600°C Spray and stir. The second processing unit, A second opening / closing device that can open and close an outlet for discharging the processed material regenerated in the second processing unit, Equipped with Ta This is an inorganic fiber product processing system.

[0006] The invention described in claim 2 is, Inorganic fiber products in which glass wool, rock wool, or ceramic wool are bound together with a binder. An inorganic fiber product processing system for processing a material to be processed, A grinding unit for grinding the material to be processed, a storage unit for storing the material ground in the grinding unit, and a supply from the storage unit Processed object to , superheated steam Spray and stir The first processing unit, A first opening / closing device that can open and close a passage for discharging the processed material processed in the first processing unit, It is located at a lower position than the first processing unit, It fell through the first opening and closing device. Items to be processed to , an oxygen-containing gas heated to 500-600°C Spray and stir. The second processing unit, A second opening / closing device that can open and close an outlet for discharging the processed material regenerated in the second processing unit, Equipped with Ta This is an inorganic fiber product processing system.

[0007] The invention described in claim 3 is an inorganic fiber product processing system according to claim 1 or 2, wherein a frustoconical space with its top facing downwards is formed inside the first processing unit and the second processing unit, respectively.

[0008] Claim 4 The invention described in the claim 3 In the inorganic fiber product processing system described, The first processing unit is located at a lower position than the storage unit. .

[0009] Claim 5 The invention described in the claim 4In the described inorganic fiber product processing system, it further includes a first separator that separates dust contained in the exhaust gas discharged from the first processing unit according to size, and the larger dust separated by the first separator is supplied to the second processing unit.

[0010] The invention according to claim 6 is, in the inorganic fiber product processing system described in claim 5 where the opening and closing device is a rotary valve or a damper.

[0011] The invention described in claim 7 is an inorganic fiber product processing system according to claim 1 or 2, wherein the first processing unit is located at a lower position than the storage unit.

Effect of the Invention

[0012] According to the present invention, Compared to inorganic fiber processing systems using rotary kilns, the installation area is significantly reduced. an inorganic fiber product processing system can be provided.

Brief Description of the Drawings

[0013] [Figure 1] It is an explanatory diagram showing the configuration of an inorganic fiber product processing system according to an embodiment of the present invention. [Figure 2] It is a photograph showing the state of the object to be processed processed by the inorganic fiber product processing system.

Embodiments for Carrying Out the Invention

[0014] Subsequently, with reference to the attached drawings, embodiments embodying the present invention will be described to facilitate understanding of the present invention. In the drawings, parts not related to the description may be omitted from illustration.

[0015] An inorganic fiber product processing system 10 (see FIG. 1) according to an embodiment of the present invention removes a binder from an unnecessary inorganic heat insulating material (an example of an inorganic fiber product) that is an object to be processed, and can be recycled, for example, as a raw material for the inorganic heat insulating material. The unnecessary inorganic heat insulating material is, for example, a used inorganic heat insulating material or an inorganic heat insulating material discharged as scraps at a manufacturing factory of inorganic fiber products.

[0016] The inorganic insulation material to be processed is an insulation material made of glass wool or rock wool, and specifically, for example, pressed products for vehicles, high-density board products, and low-density mat products. Figure 2(A1) shows an example of a pressed product for vehicles made of glass wool, and Figure 2(A2) shows an example of a low-density mat product made of glass wool. However, the materials to be treated are not limited to inorganic insulation materials in which glass wool or rock wool are bound together with a binder; any inorganic fiber product in which inorganic fiber material is bound together with a binder is acceptable. Examples of binders include phenolic resin, acrylic resin, sugar binder, and statch and other organic binders. Examples of inorganic fiber materials other than glass wool and rock wool include ceramic wool and glass fiber.

[0017] In other words, the inorganic fiber product to be processed may contain, for example, at least glass wool, rock wool, ceramic wool, or glass fiber, and be bound together with an organic binder. Furthermore, the inorganic fiber product to be processed is not limited to press scraps, but may be any type of offcut.

[0018] As shown in Figure 1, the inorganic fiber product processing system 10 includes a crusher 12, a classifier 14, a stock hopper 16, a superheated steam generator 20, a heated air generator 22, and a processing device 30.

[0019] The crusher (an example of a crushing section) 12 can crush the material to be processed that is fed into it. If the material to be processed is a pressed part for a vehicle, the crushed waste (see Figure 2(B)) is fed into the crusher 12. The processed material (crushed waste) discharged from the crusher 12 will be in the state shown in Figure 2(C1) if it is a pressed product for vehicles, and in the state shown in Figure 2(C2) if it is a low-density mat product. The crushed waste from vehicle press parts fed into the crusher 12 (see Figure 2(B)) is pre-treated to have a bulk density of 0.25 ton / m³. 3 It is preferable that the material is crushed in such a manner as described above. Furthermore, it is preferable that the pulverized waste processed by the pulverizer 12 is pulverized to an average particle size of 1.0 mm or less. The material to be processed, discharged from the crusher 12, is transported by air using the fan 122.

[0020] The classifier 14 can remove dust particles smaller than a predetermined size from the material to be processed, which has been crushed by the crusher 12. The dust removed by the classifier 14 is sucked in along with the air by the fan 17 and discharged. The discharged air is then filtered by the filter 18 to remove dust before being released into the atmosphere. A rotary valve 142 is provided at the bottom of the classifier 14, through which the processed material from which dust has been removed is discharged.

[0021] The stock hopper 16 can store the material to be processed discharged from the rotary valve 142. The stock hopper 16 is equipped with a bridge breaker 162 to suppress the occurrence of bridging. A rotary valve 164 is provided at the discharge port at the bottom of the stock hopper 16. The material to be processed, discharged from the rotary valve 164, is transported by the conveyor 19.

[0022] The superheated steam generator 20 is connected to the boiler 202 and can generate superheated steam. The temperature of the generated superheated steam is, for example, 500 to 700°C, and preferably 600 to 700°C.

[0023] The heated air generator 22 receives compressed air from an external compressor (not shown) and can generate heated air. The temperature of the generated heated air is, for example, 500 to 600°C, and preferably 500 to 550°C.

[0024] The processing apparatus 30 includes a buffer hopper 31, a pyrolysis chamber 32, and an oxidation reaction chamber 33, which are arranged vertically from top to bottom.

[0025] The buffer hopper (an example of a storage unit) 31 can store the material to be processed, which has been crushed by the crusher 12 and supplied from the stock hopper 16. A rotary valve 312 is provided at the bottom of the buffer hopper 31, and the material to be processed stored in the buffer hopper 31 is discharged from this rotary valve 312. The rotary valve 312 may be a damper or other opening and closing device, as long as it is an opening and closing device that can open and close the passage leading from the buffer hopper 31 to the pyrolysis chamber 32.

[0026] The pyrolysis chamber (an example of the first processing unit) 32 has a frustoconical space formed inside with its top facing downwards, and is positioned lower than the buffer hopper 31. The pyrolysis chamber 32 is supplied with the material to be processed from the buffer hopper 31 and superheated steam generated by the superheated steam generator 20. The material to be processed is heated to at least 500°C, for example, by the heat transfer effect of the superheated steam, and the binder is pyrolyzed. A rotary valve (an example of an opening / closing device) 322 is provided at the outlet (a passage leading to the oxidation reaction chamber 33) at the bottom of the pyrolysis chamber 32, and the material processed in the pyrolysis chamber 32 is discharged from this rotary valve 322. The rotary valve 322 may be a damper or other opening / closing device, as long as it is an opening / closing device that can open and close the passage from the pyrolysis chamber 32 to the oxidation reaction chamber 33.

[0027] The oxidation reaction chamber (an example of a second processing unit) 33 has a frustoconical space formed inside with its top facing downwards, and is positioned lower than the pyrolysis chamber 32. The oxidation reaction chamber 33 is supplied with the material to be processed in the pyrolysis chamber 32 and heated air generated by the heated air generator 22. As a result, the material to be processed is exposed to an oxygen-containing gas, and the thermally decomposed binder is removed by oxidation, and the material is recycled as a raw material for inorganic fiber products. A rotary valve 332 is provided at the outlet at the bottom of the oxidation reaction chamber 33, and the raw materials for the inorganic fiber product regenerated by the oxidation reaction chamber 33 (see Figure 2(D)) are discharged through this rotary valve 332. The rotary valve 332 may be a damper or other opening and closing device, as long as it is an opening and closing device that can open and close the outlet of the oxidation reaction chamber 33.

[0028] Here, the pyrolysis chamber 32 and the oxidation reaction chamber 33 are configured as an externally heated furnace using gas or the like as a heat source, and it is preferable that the inside is heated to at least 500°C. This configuration reduces the amount of superheated steam supplied. However, instead of the pyrolysis chamber 32 and the oxidation reaction chamber 33 being configured as externally heated furnaces, they may be configured as entirely insulated furnaces.

[0029] The inorganic fiber product processing system 10 further comprises a classifier 42, a classifier 43, and a deodorizing device 50. The classifier (an example of the first separation device) 42 can separate dust contained in the exhaust gas discharged from the pyrolysis chamber 32 according to its size. Dust smaller than a predetermined size is discharged from the top by a fan 422. Dust larger than a predetermined size is discharged from the lower outlet via a rotary valve 424 and supplied to the oxidation reaction chamber 33 by a screw conveyor 426.

[0030] The classifier (an example of a second separation device) 43 can separate dust contained in the exhaust gas discharged from the oxidation reaction chamber 33 according to its size. Dust smaller than a predetermined size is discharged from the top by a fan 432. Dust larger than a predetermined size is discharged from the lower outlet via a rotary valve 434 as raw material for inorganic fiber products.

[0031] The deodorizing device 50 can remove odorous substances contained in the exhaust gas discharged from the classifiers 42 and 43 by burning them. Since the exhaust gas contains dust of a predetermined size or smaller discharged from the classifiers 42 and 43, fine inorganic fibrous material from which the binder has been removed remains in the deodorizing device 50. This inorganic fibrous material is discharged via the rotary valve 502 as a raw material for inorganic fiber products (see Figure 2(D)). The exhaust gas discharged from the deodorizing device 50 is drawn in by the fan 504 and treated together with the exhaust gas from the manufacturing equipment 60, which manufactures inorganic fiber products using raw materials generated by the inorganic fiber product processing system 10, before being released into the atmosphere.

[0032] Next, the operation of the inorganic fiber product processing system 10 will be described. The inorganic fiber product processing system 10 operates as follows. The material to be processed in the inorganic fiber product processing system 10 is first crushed in the crusher 12. The material to be processed, crushed by the crusher 12, is temporarily stored in the stock hopper 16 and then transported to the processing unit 30. The transported material to be processed is fed into the buffer hopper 31 at the top, and when the rotary valve 312 operates, a predetermined amount is dropped and supplied to the pyrolysis chamber 32.

[0033] In the pyrolysis chamber 32, superheated steam is blown onto the material to be processed for a predetermined time, and the material is agitated by the air pressure while the binder is pyrolyzed. After the supply of superheated steam is stopped, the processed material falls due to the operation of the rotary valve 322 and is supplied to the oxidation reaction chamber 33 located below.

[0034] In the oxidation reaction chamber 33, heated air is blown onto the material to be treated, causing it to be agitated and the thermally decomposed binder to undergo an oxidation reaction. As a result, the binder is removed, and the material is recycled as a raw material for inorganic fiber products. When the supply of heated air is stopped, the processed material is dropped by the operation of the rotary valve 332 and recovered, for example, by being bagged in a flexible container bag, and then reused.

[0035] Meanwhile, the classifier 42 supplies dust particles exceeding a predetermined size from the exhaust gas discharged from the pyrolysis chamber 32 to the oxidation reaction chamber 33. Furthermore, the classifier 43 collects dust particles exceeding a predetermined size from the exhaust gas discharged from the oxidation reaction chamber 33, along with the raw materials for the inorganic fiber products regenerated in the oxidation reaction chamber 33, and reuses them. The exhaust gas discharged from classifiers 42 and 43 is deodorized by the deodorizer 50, and the fine inorganic fiber material remaining in the deodorizer 50 is recovered together with the raw materials for the inorganic fiber products regenerated in the oxidation reaction chamber 33 and reused.

[0036] Compared to inorganic fiber processing systems using a rotary kiln, this type of inorganic fiber processing system 10 has a reduced installation area and a simpler structure because it does not have a rotating furnace.

[0037] As described above, the inorganic fiber product processing system 10 according to this embodiment allows for the removal of binders from unwanted inorganic fiber products, which are the objects to be processed, and their regeneration as raw materials for inorganic fiber products.

[0038] Although embodiments of the present invention have been described above, the present invention is not limited to the above-described forms, and any changes to the conditions, etc., that do not depart from the gist of the invention are all within the scope of application of the present invention. [Explanation of Symbols]

[0039] 10. Inorganic Fiber Product Processing System 12. Crusher 14 Classifier 16 Stock Hopper 17 Fans 18 filters 19 Conveyor 20 Superheated steam generator 22. Heated air generator 30 Processing Unit 31 Buffer Hopper 32 Pyrolysis Chamber 33 Oxidation reaction chamber 42 Classifier 43 Classifier 50 Deodorizing device 60 Manufacturing equipment 122 Fans 142 Rotary Valve 162 Bridge Breaker 164 Rotary Valve 202 Boiler 312 Rotary Valve 322 Rotary Valve 332 Rotary Valve 402 Rotary Valve 422 fans 424 Rotary Valve 426 Screw conveyor 432 fans 434 Rotary Valve 502 Rotary Valve 504 Fans

Claims

1. An inorganic fiber product processing system for processing materials that are inorganic fiber products, A first processing unit heats the pulverized material using superheated steam, An inorganic fiber product processing system comprising a second processing unit that exposes the workpiece processed in the first processing unit to an oxygen-containing gas.

2. The inorganic fiber product processing system according to claim 1, wherein the second processing unit is located at a lower position than the first processing unit.

3. The inorganic fiber product processing system according to claim 1, wherein the second processing unit is located below the first processing unit.

4. The system further includes an opening / closing device that can open and close a passage through which an object to be processed passes, connecting the first processing unit to the second processing unit. The inorganic fiber product processing system according to claim 2 or 3, wherein when the opening and closing device is operated, the workpiece processed in the first processing unit is supplied to the second processing unit.

5. The inorganic fiber product processing system according to claim 4, wherein the opening and closing device is a rotary valve or a damper.

6. The system further includes a first separation device for separating dust contained in the exhaust gas discharged from the first processing unit according to its size. The inorganic fiber product processing system according to claim 4, wherein larger dust particles separated by the first separation device are supplied to the second processing unit.

7. A crushing section for crushing the material to be processed, The system further comprises a storage unit that stores the material to be processed that has been crushed in the crushing unit and supplies the stored material to the first processing unit, The inorganic fiber product processing system according to claim 6, wherein the first processing unit is located at a lower position than the storage unit.

8. The first step involves heating the crushed material using superheated steam, A second step in which the object processed in the first step is dropped, A method for processing inorganic fiber products, comprising: a third step of exposing the product to be processed after the second step to an oxygen-containing gas.

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