Carbon fiber recovery method and device

Abstract

The invention relates to the field of carbon filament recovery, in particular to a carbon fiber recovery method and device.The device comprises a collector, an air inlet pipe is arranged on the side of the collector, and a filament collecting cover is arranged at the tail end of the air inlet pipe; the filament collecting cover is arranged in multiple places according to the requirements of a workshop, an air outlet is formed in the top of the collector and connected with an air outlet pipe, the upper portion of the collector is a cuboid shell, and the lower portion of the collector is a conical shell; the gas outlet pipe is spatially connected with the pulse gas injection system, and the gas outlet pipe at the other end can be connected with a waste gas treatment system and can also be connected with a fan to form an independent carbon filament collecting system. A pulse control valve in the pulse jet system is controlled by a pulse controller, and the pulse controller controls the pulse control valve to be opened after differential pressure detection on the inner wall and the outer wall of the filter cartridge gives a signal, so that compressed air enters a pulse air inlet pipe from an air inlet. The device can effectively solve the problems that when floating in a workshop, carbon fibers are wound on moving equipment to cause frequent faults and even damage of the equipment, and when the carbon fibers float in the electrical equipment, the electrical equipment loses efficacy and is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber recycling, and in particular to a carbon fiber recycling method and device. Background Art

[0002] Carbon fiber is widely used in aerospace, military, new energy and other fields due to its high temperature resistance, corrosion resistance, high strength and lightweight. In the process of carbon fiber production and subsequent processing, it is inevitable to waste carbon fiber. For example, it is inevitable to produce floating carbon fiber fibers during oxidation, low-temperature carbonization, drying and other processes. When these carbon fiber fibers float in the workshop, they are entangled on moving equipment, causing frequent equipment failures or even damage. They fall into electrical equipment, causing failures such as electrical equipment failure and damage. Long-term inhalation by the human body causes serious organ damage. The industry is currently vigorously developing carbon fiber recycling technology and equipment. These carbon fibers still have good mechanical properties after recycling and can be used in occasions with relatively low requirements. The recycling of carbon fiber can effectively reduce resource waste and environmental pollution. Summary of the invention

[0003] The purpose of the present invention is to provide a carbon fiber recovery method and device to solve the problem raised in the above background technology that in the carbon fiber production process, there are quality problems of the raw silk itself, or the inevitable generation of carbon fiber floating silk during the process of oxidation, low-temperature carbonization, drying, etc.

[0004] When these carbon fiber filaments float in the workshop, they entangle themselves in moving equipment, causing frequent failures or even damage to the equipment; they fall into electrical equipment, causing failure and damage to the equipment; and they can cause serious organ damage after being inhaled by the human body for a long time.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention is a carbon fiber recovery device, comprising

[0007] The collector has an air inlet pipe arranged on the side of the collector and a wire collecting cover arranged at the end of the air inlet pipe.

[0008] An air outlet is arranged on the top of the collector, and the air outlet is connected to the air outlet pipeline.

[0009] The air outlet pipe is connected to the pulse jet system, and the other end of the air outlet pipe can be connected to the exhaust gas treatment system or connected to the fan to form an independent carbon filament collection system.

[0010] The pulse jet system includes a pulse control valve, a steam drum, a fixed plate, an air inlet and an air inlet pipe.

[0011] The pulse control valve is controlled by a pulse controller. After the differential pressure detection on the inner and outer walls of the filter cartridge gives a signal, the pulse controller controls the pulse control valve to open, allowing compressed air to enter the intake pipe from the air inlet.

[0012] The air inlet end of the air inlet pipe is connected to the air inlet port, and the air outlet of the air inlet pipe faces the center of the filter cartridge. The compressed air is instantly sprayed into the center of the filter cartridge under the control of the pulse controller.

[0013] The filter cartridge consists of a filter cartridge fixing plate, a filter cartridge body, and a filter cartridge sealing cover. The top of the filter cartridge is connected to the filter cartridge fixing plate, and the bottom of the filter cartridge is connected to the filter cartridge sealing cover. The filter cartridge fixing plate is a central opening and a metal plate. The size of the opening is consistent with the inner size of the filter cartridge body. The filter cartridge fixing plate is connected to the fixed slide plate. When installing the filter cartridge, align the fixed slide plate and the filter cartridge fixing plate, and push the filter cartridge in to complete the installation. The filter cartridge sealing cover is a closed circular plate, which is fixed to the bottom of the filter cartridge. Through the cooperation of the filter cartridge fixing plate, the filter cartridge body, and the filter cartridge sealing cover, a filter cartridge structure with one side open is formed. The fixed slide plate is fixed to the filter cartridge fixing plate. The fixed slide plate is an angle steel welded according to the size of the filter cartridge fixing plate, forming a channel that allows the filter cartridge to be installed and disassembled by sliding.

[0014] The upper part of the collector is a rectangular shell, which is used to install the filter cartridge and the air intake pipe controlled by the pulse controller. The lower part is a conical shell to collect the shaken carbon filaments into the wire collection barrel at the bottom of the conical shell. The wire collection barrel is a container for collecting the adsorbed floating carbon filaments. The upper opening of the wire collection barrel is provided with a flange, which is connected to the end flange of the conical shell at the bottom of the collector, thus forming a closed collection device. A block is provided at the lower edge of the upper rectangular shell of the collector, which is connected to the bracket.

[0015] Compared with the prior art, the present invention has significant advantages: the present invention can effectively solve the problems of carbon fiber filaments floating in the workshop, winding around moving equipment causing frequent equipment failures or even damage, and falling into electrical equipment causing electrical equipment failure and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric schematic diagram of the three-dimensional main structure of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 It is a left view of the three-dimensional appearance of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the pulse system and the filter cartridge of the present invention;

[0020] Figure 5This is a schematic diagram of the filter cartridge installation structure of the present invention.

[0021] Figure 1-5 In: 1. Collector, 010. Inspection door, 011. Pulse jet system, 0110. Steam drum, 0111. Pulse control valve, 0112. Fixed plate, 0113. Pulse air inlet, 0114. Pulse air inlet pipe, 2. Bracket, 3. Wire collecting barrel, 4. Air inlet pipe, 5. Wire collecting cover, 6. Air outlet pipe, 7. Filter cartridge, 070. Filter cartridge fixed plate, 071. Filter cartridge body, 072. Filter cartridge sealing cover, 8. Support plate, 9. Fixed plate slide. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 5 , the present invention provides a technical solution:

[0024] The present invention provides a carbon fiber recovery device, comprising a collector 1, an air intake pipe 4 is arranged on the side of the collector 1, and a wire collecting cover 5 is arranged at the end of the air intake pipe 4.

[0025] The wire collecting cover 5 can be set in multiple places according to the needs of the workshop itself. The top of the collector 1 is provided with an air outlet, which is connected to the air outlet pipe 6. The air outlet pipe 6 is connected to the pulse jet system, and the other end of the air outlet pipe 6 can be connected to the exhaust gas treatment system or the fan to form an independent carbon wire collection system.

[0026] The pulse jet system 011 consists of a pulse control valve 0111, a steam drum 0110, a fixed plate 0112, a pulse air inlet 0113 and a pulse air inlet pipe 0114.

[0027] The pulse control valve 0111 is controlled by a pulse controller. After the differential pressure detection on the inner and outer walls of the filter cartridge 7 gives a signal, the pulse controller controls the pulse control valve 0111 to open, so that the compressed air enters the pulse air inlet pipe 0114 from the air inlet. The air inlet end of the pulse air inlet pipe 0114 is connected to the pulse air inlet 0113, and the air outlet of the pulse air inlet pipe 0114 faces the center of the filter cartridge 7. Under the control of the pulse controller, the compressed air is instantly sprayed into the center of the filter cartridge 7.

[0028] The present invention provides a specific implementation scheme: a pulse control valve 0111 is arranged outside the steam drum 0110, fixed plates 0112 are arranged at both ends, a pulse air inlet 0113 is arranged inside, and the pulse air inlet 0113 is connected to a pulse air inlet pipe 0114.

[0029] The present invention provides a specific implementation scheme: the filter cartridge 7 is composed of a filter cartridge fixing plate 070, a filter cartridge body 071, and a filter cartridge sealing cover 072. The top of the filter cartridge 7 is connected to the filter cartridge fixing plate 070, and the bottom of the filter cartridge 7 is connected to the filter cartridge sealing cover 072. The filter cartridge fixing plate 070 is a metal plate with a central opening, and the size of the opening is consistent with the inner size of the filter cartridge body 071. The filter cartridge fixing plate 070 is connected to the fixed slide plate 9. When installing the filter cartridge, align the fixed slide plate 9 with the filter cartridge fixing plate 070, and push the filter cartridge 7 in to complete the installation. A differential pressure detection device is provided on the inner and outer walls of the filter cartridge 7.

[0030] In the present invention, the pulse controller can adopt two control modes, namely, timed injection and constant pressure difference injection, when working, which can be determined according to the on-site environment.

[0031] When the on-site environment is complex and there are many floating carbon fiber fibers, a constant pressure difference injection form is adopted. After the start-up delay countdown ends, the constant pressure difference injection cycle determines whether the pressure difference value is greater than the set "pressure difference injection start value". If it is greater, a round of injection begins. After a round of injection, determine whether the pressure difference change value is greater than the set "pressure difference injection return difference value". If it is less than this value, continue to spray for another round. If it is greater than this value, stop spraying and wait for the pressure difference value to be greater than the "pressure difference injection start value" again, and then start the next round of injection. This is done by analogy to prevent a large amount of floating carbon fiber fibers from being adsorbed on the outer wall of the filter cartridge in a short period of time, which affects the filtration effect.

[0032] For simple and clean environments with fewer carbon fiber floating fibers on site, timed injection can be used. After the timed injection start-up delay countdown ends, a round of injection begins.

[0033] After one round of spraying, the cycle timing starts. When the cycle timing reaches the set cycle time, the next round of spraying starts, and so on.

[0034] The present invention provides a specific implementation scheme: the filter cartridge sealing cover 072 is a closed circular plate, fixed to the bottom of the filter cartridge 7, and a filter cartridge structure with one side open is formed through the cooperation of the filter cartridge fixing plate 070, the filter cartridge body 071 and the filter cartridge sealing cover 072. The fixed slide plate 9 is fixed to the filter cartridge sealing cover 072, and the fixed slide plate 9 is an angle steel welded according to the size of the filter cartridge fixing plate 070, forming a channel that allows the filter cartridge 7 to be installed and removed by sliding.

[0035] The present invention provides a specific implementation scheme: the upper part of the collector 1 is a rectangular shell for installing the filter cartridge and the air intake pipe controlled by the pulse controller, and the lower part is a conical shell so that the carbon filaments that are shaken off can be collected into the wire collection barrel 3 at the bottom of the conical shell. The wire collection barrel 3 is a container for collecting the adsorbed floating carbon filaments. The upper opening of the wire collection barrel 3 is provided with a flange, which is connected to the end flange of the conical shell at the lower part of the collector, so that a closed collection device is formed. The lower edge of the upper rectangular shell of the collector 3 is provided with a stopper and connected to the bracket 2.

[0036] The present invention provides a specific implementation scheme: the port area of ​​the wire collecting cover 5 is related to the air volume, and the overall wind speed passing through the wire collecting cover needs to be maintained at 1-10m / s, that is, the more wire collecting covers 5 are set, the greater the total required air volume.

[0037] The present invention provides a specific implementation scheme: a support plate 8 is provided between the filter cartridge 7 and the pulse jet system.

[0038] The present invention provides a specific implementation scheme: an inspection door 010 is provided on the collector 1 to facilitate maintenance by the staff.

[0039] The above-mentioned device sucks in the specific process of waste silk and discharges it into the collector 1. Under the action of the fan of the carbon fiber recovery device, the carbon filaments floating in the workshop generate an air flow with a certain flow rate inward in the opening direction of the wire collecting cover. The carbon filaments floating in the workshop are directionally sucked into the wire collecting cover with the air flow, and enter the pipeline with the wire collecting cover. Due to the action of the fan, the carbon filaments flow in the pipeline with a certain flow rate with the air flow, and finally enter the collection device body (collector). Under the filtration of the filter cartridge, the carbon filaments are adsorbed on the outer wall of the filter cartridge. As the pulse controller controls the compressed air blowing action, the carbon filaments fall downward into the wire collecting tube, thereby achieving the purpose of collecting the carbon filaments.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A carbon fiber recovery device, characterized in that: include A collector (1), wherein an air intake pipe (4) is arranged on the side of the collector (1), and a wire collecting cover (5) is arranged at the end of the air intake pipe (4); The wire collecting cover (5) can be installed in multiple locations according to the needs of the workshop itself; The collector (1) is provided with an air outlet at the top, and the air outlet is connected to an air outlet pipe (6); The collector (1) has a rectangular housing on the upper part for mounting a filter cartridge and an air intake pipe controlled by a pulse controller, and a conical housing on the lower part for collecting the carbon filaments that have fallen off and putting them into a filament collection barrel (3) at the bottom of the conical housing; One end of the outlet pipe (6) is connected to the pulse jet system, and the other end of the outlet pipe (6) can be selectively connected to an exhaust gas treatment system, or connected to a fan to form an independent carbon filament collection system; The pulse jet system (011) comprises a steam drum (0110), a pulse control valve (0111) is arranged outside the steam drum (0110), fixed plates (0112) are arranged on both sides, a pulse air inlet (0113) is arranged inside the steam drum (0110), and the pulse air inlet (0113) is connected to a pulse air inlet pipe (0114); The pulse control valve (0111) is controlled by a pulse controller. After the differential pressure detection on the inner and outer walls of the filter cartridge (7) gives a signal, the pulse controller controls the pulse control valve (0111) to open, so that compressed air enters the pulse intake pipe (0114) from the pulse intake port (0113).

2. A carbon fiber recovery device according to claim 1, characterized in that: The air inlet end of the pulse air inlet pipe (0114) is connected to the pulse air inlet port (0113), and the air outlet of the pulse air inlet pipe (0114) faces the center of the filter cartridge (7). The compressed air is instantly sprayed into the center of the filter cartridge (7) under the control of the pulse controller.

3. A carbon fiber recovery device according to claim 1 or 2, characterized in that: The filter cartridge (7) comprises a filter cartridge fixing plate (070), a filter cartridge body (071), and a filter cartridge sealing cover (072); the top of the filter cartridge (7) is connected to the filter cartridge fixing plate (070), the bottom of the filter cartridge (7) is connected to the filter cartridge sealing cover (072), and a differential pressure detection device is arranged on the inner and outer walls of the filter cartridge (7).

4. A carbon fiber recovery device according to claim 1 or 3, characterized in that: The filter cartridge fixing plate (070) is a metal plate with a central opening, the size of the opening being consistent with the inner size of the filter cartridge body (071). The filter cartridge fixing plate (070) is connected to the fixed slide groove plate (9). When installing the filter cartridge, the fixed slide groove plate (9) and the filter cartridge fixing plate (070) are aligned, and the filter cartridge (7) is pushed in to complete the installation.

5. The carbon fiber recovery device according to claim 3, characterized in that: The filter cartridge sealing cover (072) is a sealed circular plate fixedly connected to the bottom of the filter cartridge (7). Through the cooperation of the filter cartridge fixing plate (070), the filter cartridge body (071) and the filter cartridge sealing cover (072), a filter cartridge structure with one side open is formed.

6. A carbon fiber recovery device according to claim 4, characterized in that: The fixed slide plate (9) and the filter cartridge sealing cover (072) are fixed, and the fixed slide plate (9) is an angle steel welded according to the size of the filter cartridge fixing plate (070), forming a channel that allows the filter cartridge (7) to be installed and removed by sliding.

7. The carbon fiber recovery device according to claim 1, characterized in that: The wire collecting barrel (3) is a container for collecting the adsorbed floating carbon filaments. The upper opening of the wire collecting barrel (3) is provided with a flange, which is connected to the flange at the end of the conical shell at the bottom of the collector to form a closed collection device. The upper part of the wire collecting barrel (3) is a rectangular shell, and the lower edge is provided with a stopper connected to the bracket (2).

8. The carbon fiber recovery device according to claim 1, characterized in that: The port area of ​​the wire collecting hood (5) is related to the air volume. The wind speed passing through the wire collecting hood needs to be kept at 1-10 m / s. The number of wire collecting hoods (5) increases as the total required air volume increases.

9. The carbon fiber recovery method according to any one of claims 1 to 8, characterized in that: The method is: The floating carbon filaments in the workshop or in the collection hood above the furnace mouth of the oxidation furnace, low-temperature furnace, and drying part are adsorbed on the outer wall of the filter cylinder through the suction of the fan; Through the differential pressure detection device set on the inner and outer walls of the filter cartridge; when the differential pressure detects that the pressure difference between the inner and outer walls of the filter cartridge is too large, an electrical signal is given to the control center, and compressed air starts to be sprayed. When the internal pressure of the filter cartridge is greater than the external pressure, the carbon fiber begins to fall; The center of the open side of the single-side open filter cartridge faces the pipeline connected to the compressed air drum, and the pulse controller controls the compressed air in the compressed air drum to spray the filter cartridge; The carbon filaments adsorbed on the outer wall of the filter cartridge are shaken off into the filament collecting barrel, thereby realizing the collection of floating carbon filaments in the workshop or process furnace mouth.

10. The carbon fiber recycling method according to claim 9, characterized in that: The pulse jet device controls the intermittent spraying of compressed air into the filter cartridge opening, causing the filter cartridge body to contract and expand.

Images