Carbonization pre-oxidation furnace and pre-oxidation method for NFs forming

Abstract

The invention relates to the technical field of carbonization oxidation furnaces, and discloses a carbonization pre-oxidation furnace and a pre-oxidation method for NFs forming. The carbonization pre-oxidation furnace comprises a pre-oxidation furnace box body, and an independent hot air circulation mechanism is arranged in the pre-oxidation furnace box body; the independent hot air circulating mechanism comprises a circulating fan, a heater, a filtering assembly, a circulating channel and a homogeneous dispersion assembly; the circulating fans are located at the two ends of the circulating channel, and the heater and the filtering assembly are located at the two ends of the circulating channel respectively. The loading module is mounted at the corresponding position of the filter, the plugging module extends into the mounting frame, then the filter is taken out, and as the plugging module plugs the channel where the filter is located, flue gas in the circulating channel can still be filtered and discharged from the filtering assembly on the other side, and the phenomenon that when the carbonization pre-oxidation furnace works, the flue gas is blocked by the plugging module is avoided. When the filter needs to be replaced, the operation of the carbonization pre-oxidation furnace needs to be suspended, so that the carbonization pre-oxidation treatment time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of carbonization oxidation furnaces, in particular to a carbonization pre-oxidation furnace and a pre-oxidation method for NFs forming. Background Art

[0002] Carbon emissions need to be converted into carbon dioxide through a carbon capture system, which can generate economic benefits and is more realistic. To achieve large-scale carbon capture, it is still necessary to rely on low-cost large-scale preparation processes for capture materials. Therefore, it is urgent to master the large-scale preparation of nanofibers (NFs) under specified scales, the nanofiber interlayer process, and the nanofiber uniform carbonization technology to solve the stability and scale problems of industrial applications and ensure the efficient and low-cost operation of carbon capture; The pre-oxidation furnace is a heat treatment furnace used to perform oxidation heat treatment on the precursor to prepare oxidized fibers. Several guide rollers are arranged outside the pre-oxidation furnace to guide the precursor. The basic oxidation process of the precursor is as follows: the oxidized fiber precursor for preparing carbon fiber, for example, polyacrylonitrile (PAN)-based continuous fiber, is guided by many guide rollers and runs through the heat treatment chamber along a zigzag path. The precursor is gradually pre-oxidized while passing through the heat treatment chamber.

[0003] During the operation of the pre-oxidation furnace, the pre-oxidation furnace needs to work for a long time. Since the internal temperature of the pre-oxidation furnace needs to reach the rated value when it is working, if the filter fails to work or needs to be cleaned during operation, the pre-oxidation furnace needs to be paused, and the filter with the problem needs to be removed, and then cleaned or replaced with a new filter. At this time, when the pre-oxidation furnace is started again, it is necessary to wait for the temperature of the pre-oxidation furnace to rise to the rated value before the raw silk can be carbonized and pre-oxidized. At this time, before the pre-oxidation furnace is paused, the raw silk to be processed on the conveying mechanism is damaged while waiting for the temperature to rise, which affects the carbonization pre-oxidation treatment effect. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a carbonization pre-oxidation furnace and a pre-oxidation method for NFs forming, which are equipped with the steps of installing a loading module at a position corresponding to the filter, extending a blocking module into the interior of a mounting frame, and then taking out the filter. At this time, since the blocking module blocks the channel where the filter should be located, the flue gas in the circulation channel can still be filtered and discharged from the filter assembly on the other side, thereby avoiding the need to replace the filter when the carbonization pre-oxidation furnace is working, which causes the need to suspend the operation of the carbonization pre-oxidation furnace, saving the time for carbonization pre-oxidation treatment, and solving the problem that when the filter cannot work or needs to be cleaned during operation, the pre-oxidation furnace needs to be paused, the filter with the problem needs to be removed, and then the filter needs to be cleaned or replaced with a new one. At this time, when the pre-oxidation furnace is started again, it is necessary to wait for the temperature of the pre-oxidation furnace to rise to the rated value before the raw silk can be carbonized and pre-oxidized. At this time, before the pre-oxidation furnace is paused, the raw silk to be processed on the conveying mechanism is damaged while waiting for the temperature to rise, thereby affecting the effect of carbonization and pre-oxidation treatment.

[0005] In order to solve the above-mentioned technical problem that when the filter fails to work or needs to be cleaned during operation, the pre-oxidation furnace needs to be paused, the filter with the problem needs to be removed, and then the filter needs to be cleaned or replaced with a new one. At this time, when the pre-oxidation furnace is started again, it is necessary to wait for the temperature of the pre-oxidation furnace to rise to the rated value before the raw silk can be carbonized and pre-oxidized. In addition, before the pre-oxidation furnace is paused, the raw silk to be processed on the conveying mechanism is damaged while waiting for the temperature to rise, thus affecting the effect of the carbonization and pre-oxidation treatment. The present invention provides the following technical solutions: A carbonization pre-oxidation furnace comprises a pre-oxidation furnace housing, the An independent hot air circulation mechanism is arranged inside the pre-oxidation furnace box, and the independent hot air circulation mechanism includes a circulation fan, a heater, a filter assembly, a circulation channel and a homogenous dispersion assembly; the circulation fan is located at both ends of the circulation channel, and the heater and the filter assembly are respectively located at both ends of the circulation channel; the filter assembly includes a filter, a mounting frame, a loading module and a blocking module; the mounting frame is located at one end of the circulation channel, the filter is installed inside the mounting frame, the loading module is located on the side of the pre-oxidation furnace box, and the blocking module is located inside the loading module; a conveying mechanism is arranged at the bottom of the independent hot air circulation mechanism.

[0006] Preferably, an air inlet and an air outlet are respectively arranged at both ends of the circulation channel, the circulation fan is located between the air inlet and the air outlet, the heater is located inside the air inlet, and the filter assembly is located inside the air outlet.

[0007] Preferably, the homogeneous dispersion component is located on the other side of the heater, and the homogeneous dispersion component includes an air guide hood and a homogeneous dispersion plate. The air guide hood is located inside the circulation channel, and one end of the air guide hood is connected to the air inlet. The homogeneous dispersion plate is located at the other end of the air guide hood. The surface of the homogeneous dispersion plate is penetrated by air outlet holes, and the air outlet holes are horizontally placed above the conveying mechanism and are arranged perpendicular to the conveying direction of the conveying mechanism.

[0008] Preferably, the filter assembly is respectively arranged on both sides of one end of the pre-oxidation furnace box, and the filter assembly also includes a locking assembly, which is located between the installation frame and the filter; the blocking module is used to cut off the lock between the locking assembly and the filter, and when the blocking module extends into the interior of the installation frame, the locking assembly is separated from the filter, and the locking assembly resists the blocking module.

[0009] Preferably, the locking assembly includes locking blocks, the locking blocks are located at both ends of the installation frame, a wedge block is provided at the proximal end of the locking block, a compression spring is provided between the locking block and the installation frame, a locking groove is provided on the end surface of the filter, the locking block is adapted to the locking groove, a mounting groove is provided at the distal end of the inner side of the installation frame, a fixing block is provided at the distal end of the filter, and when the filter is pushed into the interior of the installation frame, the fixing block extends into the interior of the mounting groove.

[0010] Preferably, the loading module is an externally installed auxiliary module, and a mounting hole is provided on the side of the pre-oxidation furnace box body. The blocking module extends into the interior of the mounting frame through the mounting hole. When one end of the blocking module extends into the mounting frame, the other end of the blocking module is located inside the loading module.

[0011] Preferably, the loading module includes a loading chamber, a backblowing port and a backblowing discharge port. A mounting plate is provided at the far end of the loading chamber. The blocking module is arranged through the mounting plate and is slidably connected to the mounting plate. A cleaning slide rail is provided on one side of the inner cavity of the loading chamber. The cleaning slide rail is adapted to the filter. A backblowing gap is formed between the filter and the side wall of the loading chamber. Sealing slide rails are provided on the top of both sides of the inner cavity of the loading chamber. The sealing slide rails are adapted to the blocking module. The backblowing port is located above the inner cavity of the loading chamber, and the backblowing discharge port is located at the bottom of the other side of the loading chamber.

[0012] Preferably, the blocking module comprises a blocking plate, the blocking plate is arranged to penetrate the mounting plate, and the blocking plate is slidably connected to the blocking slide rail.

[0013] Preferably, there are a plurality of the homogeneous dispersion components, a connecting pipe is provided above the air guide cover, and the outermost connecting pipe is connected to the air inlet through an air outlet pipe.

[0014] A preoxidation method for NFs molding uses the carbonization preoxidation furnace.

[0015] Compared with the prior art, the present invention provides a carbonization pre-oxidation furnace and a pre-oxidation method for NFs forming, which have the following beneficial effects: 1. The carbonization pre-oxidation furnace blows air into the circulation channel through the circulation fan in the independent hot air circulation mechanism, so that the air is heated by the heater, and then dispersed by the uniform dispersion component and blown in the direction of the conveying mechanism, thereby carbonizing and pre-oxidizing the carbon nanofiber precursor, and then the air after the carbonization pre-oxidation treatment is discharged through the filter component and enters the other end of the circulation fan again; when the carbonization pre-oxidation furnace works for a long time and the filter is cleaned, the loading module is installed at the corresponding position of the filter, and then the blocking module is extended into the installation frame, and then the filter is taken out. At this time, since the blocking module blocks the channel where the filter should be located, the smoke in the circulation channel can still be discharged from the other side. The filter assembly filters and discharges, avoiding the need to replace the filter when the carbonization pre-oxidation furnace is working, which causes the need to suspend the operation of the carbonization pre-oxidation furnace, saving the time of the carbonization pre-oxidation treatment, and thus avoiding the situation in which the filter cannot work or needs to be cleaned during operation. The pre-oxidation furnace needs to be paused, the filter with the problem needs to be removed, and then cleaned or replaced with a new filter. At this time, when the pre-oxidation furnace is started again, it is necessary to wait for the temperature of the pre-oxidation furnace to rise to the rated value before the carbonization pre-oxidation treatment of the raw silk can be carried out. At this time, before the pre-oxidation furnace is paused, the raw silk to be processed on the conveying mechanism is damaged while waiting for the temperature to rise, affecting the effect of the carbonization pre-oxidation treatment.

[0016] 2. The air treated by carbonization pre-oxidation in the carbonization pre-oxidation furnace is discharged through the filter assembly and enters the other end of the circulating fan again; when the carbonization pre-oxidation furnace has been working for a long time, the filter needs to be cleaned by installing the loading module at the corresponding position of the filter, and then extending the blocking module into the installation frame. When the filter is working, the filter is locked by the locking assembly in the filter assembly. When the filter is cleaned, the blocking module is extended between the filter and the locking assembly to separate the locking assembly from the filter, so that the filter can be taken out.

[0017] 3. The carbonization pre-oxidation furnace disperses the air through a uniform dispersion component and blows it in the direction of a conveying mechanism, thereby performing a carbonization pre-oxidation treatment on the carbon nanofiber precursor. The air introduced is conveyed toward the heater through an air guide hood in the uniform dispersion component, and the heated air is evenly blown downward by a uniform dispersion plate and air outlet holes at the bottom of the heater, so that the heated air can be dispersed on the carbon nanofiber precursor to be carbonized and pre-oxidized.

[0018] 4. The carbonization pre-oxidation furnace uses the locking block in the locking assembly, and under the action of the compression spring, the wedge block at the end of the locking block is pressed against the locking groove on the filter, and cooperates with the mounting groove in the mounting frame to lock the filter; when the filter needs to be cleaned, the blocking module extends into the mounting frame, first pushing the wedge block, so that the wedge block has a tendency to move upward, and then the wedge block drives the locking block to move upward, and the compression spring is further compressed. When the filter is taken out, under the action of the compression spring, the compression spring applies pressure to the wedge block, presses the blocking module, and fixes the blocking module.

[0019] 5. The carbonization pre-oxidation furnace places the plugging module and the removed filter through the loading chamber in the loading module. When cleaning or replacing the filter, first extend the plugging module into the installation frame along the plugging slide rail, and then take out the filter, so that the filter moves out along the cleaning slide rail. At this time, the filter is located inside the cleaning slide rail, and because the plugging module above the loading chamber extends into the installation frame, a back-blowing port is formed between the filter and the top of the loading chamber. By blowing air into the back-blowing port, air enters from the top of the filter and is discharged from the bottom of the filter. The smoke and dust filtered under the filter is cleaned and discharged from the back-blowing discharge port. During back-blowing cleaning, a back-blowing gap is formed between the filter and the side wall of the loading chamber, and part of the air is discharged through the back-blowing gap, so that the side of the bottom of the filter can be blown, so that the waste adhered to the side of the bottom of the filter is cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is one of the schematic diagrams of the internal cross-sectional stereoscopic structure of the circulation channel of the present invention; Figure 3 This is the second schematic diagram of the internal cross-sectional stereoscopic structure of the circulation channel of the present invention; Figure 4 It is a schematic diagram of a partially cutaway three-dimensional structure of a homogeneous dispersion component of the present invention; Figure 5 It is a schematic diagram of a partial cross-sectional explosion structure of the filter assembly of the present invention; Figure 6 For the present invention Figure 5 A local enlarged structural schematic diagram; Figure 7 It is a partial structural schematic diagram of a loading module of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point B.

[0021] In the figure: 1. pre-oxidation furnace box; 2. independent hot air circulation mechanism; 3. circulation fan; 4. heater; 5. filter assembly; 51. filter; 511. locking groove; 512. fixing block; 52. mounting frame; 521. mounting groove; 53. loading module; 531. loading chamber; 532. backblowing port; 533. backblowing discharge port; 535. cleaning slide rail; 536. backblowing gap; 537. blocking slide rail; 54. blocking module; 541. blocking plate; 55. locking assembly; 551. locking block; 552. wedge block; 553. compression spring; 6. circulation channel; 61. air inlet; 62. air outlet; 7. uniform dispersion assembly; 71. air guide cover; 711. connecting pipe; 712. air outlet pipe; 72. uniform dispersion plate; 73. air outlet strip hole; 8. conveying mechanism. 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 8 A carbonization pre-oxidation furnace comprises a pre-oxidation furnace body 1, wherein an independent hot air circulation mechanism 2 is arranged inside the pre-oxidation furnace body 1, wherein the independent hot air circulation mechanism 2 comprises a circulation fan 3, a heater 4, a filter assembly 5, a circulation channel 6 and a homogenous dispersion assembly 7; the circulation fan 3 is located at both ends of the circulation channel 6, and the heater 4 and the filter assembly 5 are respectively located at both ends of the circulation channel 6; the filter assembly 5 comprises a filter 51, a mounting frame 52, a loading module 53 and a blocking module 54; the mounting frame 52 is located at one end of the circulation channel 6, the filter 51 is installed inside the mounting frame 52, the loading module 53 is located on the side of the pre-oxidation furnace body 1, and the blocking module 54 is located inside the loading module 53; a conveying mechanism 8 is arranged at the bottom of the independent hot air circulation mechanism 2.

[0024] When in use, the circulation fan 3 in the independent hot air circulation mechanism 2 blows air into the circulation channel 6, so that the air is heated by the heater 4, and then dispersed by the uniform dispersion component 7 and blown in the direction of the conveying mechanism 8, thereby carbonizing and pre-oxidizing the carbon nanofiber precursor, and then the air after the carbonization and pre-oxidation is discharged through the filter component 5 and enters the other end of the circulation fan 3 again; when the carbonization and pre-oxidation furnace has been working for a long time, the filter 51 is cleaned by installing the loading module 53 at the corresponding position of the filter 51, and then extending the blocking module 54 into the installation frame 52, and then taking out the filter 51. At this time, since the blocking module 54 blocks the channel where the filter 51 should be located, the flue gas in the circulation channel 6 can still be filtered and discharged from the filter component 5 on the other side, avoiding the need to replace the filter 51 when the carbonization and pre-oxidation furnace is working, which causes the need to suspend the operation of the carbonization and pre-oxidation furnace, thereby saving the time of the carbonization and pre-oxidation treatment.

[0025] Embodiment 1 Furthermore, an air inlet 61 and an air outlet 62 are respectively provided at both ends of the circulation channel 6, the circulation fan 3 is located between the air inlet 61 and the air outlet 62, the heater 4 is located inside the air inlet 61, and the filter assembly 5 is located inside the air outlet 62.

[0026] Furthermore, the homogeneous dispersion component 7 is located on the other side of the heater 4, and the homogeneous dispersion component 7 includes an air guide cover 71 and a homogeneous dispersion plate 72. The air guide cover 71 is located inside the circulation channel 6, and one end of the air guide cover 71 is connected to the air inlet 61, and the homogeneous dispersion plate 72 is located at the other end of the air guide cover 71. The surface of the homogeneous dispersion plate 72 is penetrated by air outlet holes 73, and the air outlet holes 73 are horizontally placed above the conveying mechanism 8 and are perpendicular to the conveying direction of the conveying mechanism 8; the air introduced is conveyed toward the heater 4 through the air guide cover 71 in the homogeneous dispersion component 7, and the heated air is evenly blown downward by the homogeneous dispersion plate 72 and the air outlet holes 73 at the bottom of the heater 4, so that the heated air can be dispersed on the carbon nanofiber precursor to be carbonized and pre-oxidized.

[0027] Embodiment 2 Furthermore, the filter assembly 5 is respectively arranged on both sides of one end of the pre-oxidation furnace box 1, and the filter assembly 5 also includes a locking assembly 55, and the locking assembly 55 is located between the installation frame 52 and the filter 51; the blocking module 54 is used to cut off the lock between the locking assembly 55 and the filter 51, and when the blocking module 54 extends into the installation frame 52, the locking assembly 55 is separated from the filter 51, and the locking assembly 55 resists the blocking module 54; through the locking assembly 55 in the filter assembly 5, when the filter 51 is working, the filter 51 is locked, and when the filter 51 is cleaned, the blocking module 54 extends between the filter 51 and the locking assembly 55, so that the locking assembly 55 is separated from the filter 51, and the filter 51 can be taken out.

[0028] Furthermore, the locking assembly 55 includes locking blocks 551, the locking blocks 551 are located at both ends of the installation frame 52, a wedge block 552 is provided at the proximal end of the locking block 551, a compression spring 553 is provided between the locking block 551 and the installation frame 52, a locking groove 511 is provided at the end surface of the filter 51, the locking block 551 is adapted to the locking groove 511, a mounting groove 521 is provided at the inner distal end of the installation frame 52, and a fixing block 512 is provided at the distal end of the filter 51. When the filter 51 is pushed into the interior of the installation frame 52, the fixing block 512 extends into the interior of the mounting groove 521; through the locking block 551 in the locking assembly 55, the filter 51 is compressed. Under the action of the spring 553, the wedge block 552 at the end of the locking block 551 is pressed against the locking groove 511 on the filter 51, and cooperates with the mounting groove 521 in the mounting frame 52, so that the filter 51 is locked; when the filter 51 needs to be cleaned, the blocking module 54 extends into the mounting frame 52, first pushing the wedge block 552, so that the wedge block 552 has a tendency to move upward, and then the wedge block 552 drives the locking block 551 to move upward, and the compression spring 553 is further compressed. When the filter 51 is taken out, under the action of the compression spring 553, the compression spring 553 applies pressure to the wedge block 552, presses the blocking module 54, and fixes the blocking module 54.

[0029] Embodiment 3 Furthermore, the loading module 53 is an externally installed auxiliary module, and a mounting hole is provided on the side of the pre-oxidation furnace body 1, and the blocking module 54 extends into the interior of the mounting frame 52 through the mounting hole. When one end of the blocking module 54 extends into the mounting frame 52, the other end of the blocking module 54 is located inside the loading module 53; the loading module 53 is externally installed, and when the filter 51 needs to be cleaned or replaced, the loading module 53 and the blocking module 54 are installed at the mounting hole position outside the pre-oxidation furnace body 1.

[0030] Embodiment 4 Furthermore, the loading module 53 includes a loading chamber 531, a back-blowing port 532 and a back-blowing discharge port 533. A mounting plate is provided at the far end of the loading chamber 531. The blocking module 54 is arranged through the mounting plate and is slidably connected to the mounting plate. A cleaning slide rail 535 is provided on one side of the inner cavity of the loading chamber 531. The cleaning slide rail 535 is adapted to the filter 51. A back-blowing gap 536 is formed between the filter 51 and the side wall of the loading chamber 531. Blocking slide rails 537 are provided on the top of both sides of the inner cavity of the loading chamber 531. The blocking slide rails 537 are adapted to the blocking module 54. The back-blowing port 532 is located above the inner cavity of the loading chamber 531, and the back-blowing discharge port 533 is located at the bottom of the other side of the loading chamber 531. The blocking module 54 and the removed filter 51 are placed through the loading chamber 531 in the loading module 53. When When cleaning or replacing the filter 51, first extend the blocking module 54 into the installation frame 52 along the blocking slide rail 537, and then take out the filter 51 so that the filter 51 moves out along the cleaning slide rail 535. At this time, the filter 51 is located inside the cleaning slide rail 535, and because the blocking module 54 above the loading chamber 531 extends into the installation frame 52, a back-blowing port 532 is formed between the filter 51 and the top of the loading chamber 531. By blowing air into the back-blowing port 532, air enters from the top of the filter 51 and is discharged from the bottom of the filter 51. The smoke and dust filtered at the bottom of the filter 51 is cleaned and discharged from the back-blowing discharge port 533. During back-blowing cleaning, a back-blowing gap 536 is formed between the filter 51 and the side wall of the loading chamber 531. Part of the air is discharged through the back-blowing gap 536, and then one side of the bottom of the filter 51 can be blown, so that the waste adhered to one side of the bottom of the filter 51 is cleaned.

[0031] Furthermore, the blocking module 54 includes a blocking plate 541, which passes through the mounting plate and is slidably connected to the blocking slide rail 537; the blocking plate 541 moves along the blocking slide rail 537 and extends into the interior of the mounting frame 52, and then the blocking plate 541 extends between the filter 51 and the wedge block 552 in the locking assembly 55, pushing the locking block 551 upward out of the locking groove 511 of the filter 51, thereby releasing the downward lock on the filter 51, and then the fixing block 512 on the filter 51 can be removed from the mounting groove 521.

[0032] Furthermore, the homogeneous dispersion assembly 7 is composed of a plurality of components. A connecting pipe 711 is provided above the air guide cover 71 , and the outermost connecting pipe 711 is connected to the air inlet 61 through an air outlet pipe 712 .

[0033] A preoxidation method for NFs molding uses the carbonization preoxidation furnace.

[0034] Working principle: When in use, the circulating fan 3 in the independent hot air circulation mechanism 2 blows air into the circulation channel 6, so that the air is heated by the heater 4, and then dispersed by the uniform dispersion component 7 and blown in the direction of the conveying mechanism 8, thereby carbonizing and pre-oxidizing the carbon nanofiber precursor, wherein the air is conveyed to the heater 4 by the air guide cover 71 in the uniform dispersion component 7, and the heated air is evenly blown out by the uniform dispersion plate 72 and the air outlet strip holes 73 at the bottom of the heater 4, so that the heated air can be dispersed on the carbon nanofiber precursor to be carbonized and pre-oxidized; Then the air after the carbonization pre-oxidation treatment is discharged outward through the filter assembly 5 and enters the other end of the circulation fan 3 again; when the carbonization pre-oxidation furnace has been working for a long time, the filter 51 is cleaned by installing the loading module 53 at the corresponding position of the filter 51, and then extending the blocking module 54 into the installation frame 52, and locking the filter 51 through the locking assembly 55 in the filter assembly 5 when the filter 51 is working. When the filter 51 is cleaned, the blocking module 54 extends between the filter 51 and the locking assembly 55, so that the locking assembly 55 is separated from the filter 51, and the filter 51 can be taken out; The filter 51 is then taken out. At this time, since the blocking module 54 blocks the channel where the filter 51 should be located, the smoke in the circulation channel 6 can still be filtered and discharged from the filter assembly 5 on the other side. Through the locking block 551 in the locking assembly 55, under the action of the compression spring 553, the wedge block 552 at the end of the locking block 551 is pressed against the locking groove 511 on the filter 51 and cooperates with the installation groove 521 in the installation frame 52, so that the filter 51 is locked; when the filter 51 needs to be cleaned, the blocking module 54 extends into the installation frame 52, first pushes the wedge block 552, so that the wedge block 552 has a tendency to move upward, and then the wedge block 552 drives the locking block 551 to move upward, and the compression spring 553 is further compressed. After the filter 51 is taken out, under the action of the compression spring 553, the compression spring 553 applies pressure to the wedge block 552, presses the blocking module 54, so that the blocking module 54 can be fixed; In the above process, the blocking module 54 and the taken out filter 51 are placed through the loading chamber 531 in the loading module 53. When cleaning or replacing the filter 51, the blocking module 54 is first extended into the interior of the installation frame 52 along the blocking slide rail 537, and then the filter 51 is taken out, so that the filter 51 is moved out along the cleaning slide rail 535. At this time, the filter 51 is located inside the cleaning slide rail 535, and because the blocking module 54 above the loading chamber 531 extends into the installation frame 52, a back-blowing port 532 is formed above the filter 51 and the loading chamber 531, and by blowing into the back-blowing port 532, the filter 51 is cleaned. Air is blown in from the top of the filter 51 and then discharged from the bottom of the filter 51, so that the smoke and dust filtered at the bottom of the filter 51 are cleaned and discharged from the back-blowing discharge port 533. During the back-blowing cleaning, a back-blowing gap 536 is formed between the filter 51 and the side wall of the loading chamber 531, and part of the air is discharged through the back-blowing gap 536, and then can be blown to one side of the bottom of the filter 51, so that the waste adhered to one side of the bottom of the filter 51 is cleaned; it is avoided that the filter 51 needs to be replaced when the carbonization pre-oxidation furnace is working, which causes the need to suspend the operation of the carbonization pre-oxidation furnace, thereby saving the time of the carbonization pre-oxidation treatment.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbonization pre-oxidation furnace, comprising a pre-oxidation furnace box, wherein an independent hot air circulation mechanism is arranged inside the pre-oxidation furnace box, characterized in that: The independent hot air circulation mechanism includes a circulation fan, a heater, a filter component, a circulation channel and a uniform dispersion component; The circulation fan is located at two ends of the circulation channel, and the heater and the filter assembly are respectively located at two ends of the circulation channel; The filter assembly includes a filter, a mounting frame, a loading module and a blocking module; the mounting frame is located at one end of the circulation channel, the filter is installed inside the mounting frame, the loading module is located on the side of the pre-oxidation furnace box, and the blocking module is located inside the loading module; A conveying mechanism is provided at the bottom of the independent hot air circulation mechanism; The filter components are respectively arranged on both sides of one end of the pre-oxidation furnace box, and the filter component also includes a locking component, which is located between the installation frame and the filter; the blocking module is used to cut off the lock between the locking component and the filter, and when the blocking module extends into the installation frame, the locking component is separated from the filter, and the locking component abuts against the blocking module; The locking assembly comprises locking blocks, the locking blocks are located at both ends of the installation frame, a wedge block is arranged at the proximal end of the locking block, a compression spring is arranged between the locking block and the installation frame, a locking groove is arranged at the end surface of the filter, the locking block is adapted to the locking groove, a mounting groove is arranged at the distal end of the inner side of the installation frame, a fixing block is arranged at the distal end of the filter, and when the filter is pushed into the interior of the installation frame, the fixing block extends into the interior of the mounting groove; The loading module includes a loading chamber, a backblowing port and a backblowing discharge port. A mounting plate is provided at the far end of the loading chamber. The blocking module is arranged through the mounting plate and is slidably connected to the mounting plate. A cleaning slide rail is provided on one side of the inner cavity of the loading chamber. The cleaning slide rail is adapted to the filter. A backblowing gap is formed between the filter and the side wall of the loading chamber. Blocking slide rails are provided on the top of both sides of the inner cavity of the loading chamber. The blocking slide rails are adapted to the blocking module. The backblowing port is located above the inner cavity of the loading chamber, and the backblowing discharge port is located at the bottom of the other side of the loading chamber.

2. A carbonization pre-oxidation furnace according to claim 1, characterized in that: An air inlet and an air outlet are respectively arranged at two ends of the circulation channel, the circulation fan is located between the air inlet and the air outlet, the heater is located inside the air inlet, and the filter assembly is located inside the air outlet.

3. A carbonization pre-oxidation furnace according to claim 2, characterized in that: The homogeneous dispersion component is located on the other side of the heater, and the homogeneous dispersion component includes an air guide cover and a homogeneous dispersion plate. The air guide cover is located inside the circulation channel, and one end of the air guide cover is connected to the air inlet. The homogeneous dispersion plate is located at the other end of the air guide cover. The surface of the homogeneous dispersion plate is penetrated by air outlet holes, and the air outlet holes are horizontally placed above the conveying mechanism and are arranged perpendicular to the conveying direction of the conveying mechanism.

4. A carbonization pre-oxidation furnace according to claim 1, characterized in that: The loading module is an external installation auxiliary module. A mounting hole is provided on the side of the pre-oxidation furnace box. The blocking module extends into the interior of the mounting frame through the mounting hole. When one end of the blocking module extends into the mounting frame, the other end of the blocking module is located inside the loading module.

5. A carbonization pre-oxidation furnace according to claim 4, characterized in that: The blocking module includes a blocking plate, which is disposed through the mounting plate and is slidably connected to the blocking slide rail.

6. A carbonization pre-oxidation furnace according to claim 3, characterized in that: There are a plurality of homogeneous dispersion components, and a connecting pipe is arranged above the air guide cover, and the outermost connecting pipe is connected to the air inlet through an air outlet pipe.

7. A pre-oxidation method for NFs forming, characterized in that: A carbonization pre-oxidation furnace as described in any one of claims 1 to 6 is used.

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