CN109943358B - Macromolecule micro-negative pressure thermal cracking method for waste tires - Google Patents
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Abstract
The invention provides a high-molecular micro-negative pressure thermal cracking method for waste tires. Specifically, the block tire is directly subjected to two-stage crushing, crushed materials are injected onto a microporous plate in a kettle body through an embedded pipe of the reaction kettle, then the kettle body is sealed, the temperature is raised to about 120 ℃ at a low speed under the condition of micro negative pressure, the temperature is changed into deep negative pressure after being kept for a period of time, the temperature is raised to 450 ℃ at a higher temperature raising speed, nitrogen protection is carried out, continuous pyrolysis is carried out under the condition of reduced pressure, oil subjected to pyrolysis can be discharged downwards through the microporous plate under the condition of pressurization, a solid phase is remained on the microporous plate, and after drying and grinding, existing metal wires in the tire exist in a granular shape or a sheet shape and can be removed through screening. By applying the invention, the whole process of tire crushing, pyrolysis and material receiving can be integrally completed, the link of stripping the metal wire is saved, and the continuity and the process efficiency of the pyrolysis process are obviously improved.
Description
Technical Field
The invention relates to the technical field of tire thermal cracking, in particular to a high-molecular micro-negative pressure thermal cracking method for waste tires.
Background
The waste tires cause direct pollution to the environment, and various countries in the world are dedicated to the recycling research of the waste tires. Compared with the waste tire treatment methods such as retreading, rubber powder manufacturing, reclaimed rubber manufacturing, incineration and the like, the pyrolysis method has the characteristics of large waste tire treatment capacity, high benefit, small environmental pollution and the like, and better accords with the recycling, harmless and reduction principles of waste treatment. In recent years, pyrolysis treatment of waste tires is gradually developed from a laboratory stage to a large-scale stage, and pyrolysis research of waste tires is also gradually focused on new process development, condition optimization and analysis and utilization of pyrolysis products.
There are many methods for pyrolysis of waste tires, such as catalytic pyrolysis, vacuum pyrolysis, hydropyrolysis, autothermal pyrolysis, dry pyrolysis, low-temperature pyrolysis, superheated steam stripping pyrolysis, coal co-pyrolysis, plasma pyrolysis, etc., and there are also many reactor forms, such as moving bed, fixed bed, fluidized bed, ablative bed, suspension furnace, rotary kiln, etc., among which moving bed, fixed bed, rotary kiln, and fluidized bed are the main ones. In the cracking technology of the tire, reaction conditions and a reactor structure are fundamental factors influencing the process effect, and in the current stage, the conventional cracking method is to strip and crush steel wires in the tire, then put the steel wires into a reaction kettle, directly heat the steel wires to 500-700 ℃ in the kettle, keep the temperature for a period of time, separate and collect oil products and carbon black products. The process has insufficient rubber cracking, and a large amount of disordered fragments are generated by rubber cracking at high temperature and are accompanied by secondary reaction of free radicals; in addition, the conventional cracking mode lacks the capability of separating steel wires, so a preposed steel wire stripping link is required to be introduced, and the continuity of the process is influenced. In addition, the conventional cracking equipment only focuses on the improvement of the structure of the reaction kettle, but the circulation of various materials in the treatment process is lack of a mechanical means, so that the matching efficiency among all process ring sections is low.
Disclosure of Invention
The invention aims to provide a high-molecular micro-negative pressure thermal cracking method for waste tires aiming at the technical defects of the prior art, and aims to solve the technical problem that the effect of the thermal cracking method for the tires in the prior art needs to be improved.
The invention also aims to solve the technical problem that a steel wire stripping link is required to be arranged in the conventional tire thermal cracking method.
The invention aims to solve the technical problem of improving the mechanization level of the thermal cracking equipment for the tires.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a macromolecule micro-negative pressure thermal cracking method for waste tires comprises the following steps:
1) adding a blocky tire into a groove body of a crushing mechanism, driving a sealing plate to seal the bottom end of the groove body by using an electric push rod, starting a first rotating shaft to crush the blocky tire to a granularity smaller than 40 meshes, then opening the sealing plate, inputting crushed tire particles into a bin body, starting a first motor to drive a second rotating shaft to rotate, further crushing the material, and then discharging the material from a discharge port;
2) injecting the discharged materials into the kettle body from the embedded pipe of the reaction kettle, enabling the materials to be flatly laid on the microporous plate, lifting the embedded pipe to enable the wide mouth to be attached to the fixing ring, exhausting air from the port of the upper end of the embedded pipe to reduce pressure, then closing the end cover of the upper end of the embedded pipe, starting the second motor to enable the materials on the microporous plate to be continuously stirred by the stirring rod, and simultaneously starting the electric heating ring to heat the kettle body;
3) under the pressure of 0.8 atmospheric pressure, heating from normal temperature to 120 ℃ at the heating rate of 11.5 ℃/min, and then keeping the temperature within the temperature range of 110-130 ℃ for 30 min; stopping stirring, further reducing the pressure to 0.2 atmospheric pressure, and then continuously heating to 450 ℃ at the heating speed of 35 ℃/min; pushing down the embedded pipe, loosening the seal between the wide mouth and the fixing ring, flushing nitrogen into the kettle body from the bypass pipe, then lifting up the embedded pipe to seal the wide mouth and the fixing ring again, extracting air from the port at the upper end of the embedded pipe, reducing the pressure to 0.5 atmospheric pressure, and keeping the temperature at 450 ℃ for 8 hours;
4) and closing the electric heating ring, naturally cooling to normal temperature, opening a valve on the oil discharge pipe, pressurizing the kettle body from the port at the upper end of the embedded pipe, pushing the oil material obtained by pyrolysis on the microporous plate down to the bottom end of the kettle body, discharging from the oil discharge pipe, opening the kettle body, scraping the solid phase on the microporous plate, and drying to obtain the carbon black.
Preferably, the crushing mechanism comprises a trough body, an upper cover, a first rotating shaft, a bin body, an electric push rod, a sealing plate, an inclined pipe, a first motor, a second rotating shaft and a discharge opening, wherein the upper cover is hinged to the upper end of the trough body, the first rotating shaft is connected to the inner side of the upper cover, the lower end of the trough body is communicated with the upper end of the bin body through a pipe body, the sealing plate is connected to the side wall of the pipe body through the electric push rod, and the inclined pipe is connected to the side wall of the pipe body; the bin body is internally provided with a second rotating shaft, the second rotating shaft is in transmission connection with a first motor, the bottom end of the bin body is provided with a discharge opening, and the outer walls of the first rotating shaft and the second rotating shaft are fixedly connected with cutters.
Preferably, the reaction kettle comprises a kettle body, an outer sleeve, a fixing ring, an embedded pipe, a wide mouth, a bypass pipe, a second motor, a stirring rod, a microporous plate, an electric heating ring and an oil discharge pipe, wherein the outer sleeve is connected to the top end of the kettle body, the embedded pipe is inserted into the outer sleeve, the fixing ring is fixedly connected to the inner wall of the outer sleeve, the wide mouth is fixedly connected to the lower end of the embedded pipe, the bypass pipe is connected to the side wall of the outer sleeve, the second motor is connected to the top end of the kettle body, the stirring rod is in transmission connection with the second motor, the stirring rod is inserted into the kettle body, the microporous plate is fixedly connected to the kettle body, the electric heating ring is connected to the side wall of the kettle body, the oil discharge pipe is connected to the bottom end of the kettle body, and an end cover is connected to the top end of the embedded pipe, and a valve is arranged on the oil discharge pipe.
Preferably, the method further comprises the following step 5): grinding the carbon black obtained in the step 4) by using a grinder, and then sieving by using a 320-mesh sieve, wherein the sieved matter is carbon black powder, and the intercepted matter is metal.
Preferably, the temperature reduction speed in the step 4) is not higher than 25 ℃/min.
Preferably, the second rotating shafts of the crushing mechanism are two and parallel to each other.
Preferably, the device further comprises a bin wall vibrator, wherein an asbestos pad is fixedly connected to the outer wall of the kettle body of the reaction kettle, and the bin wall vibrator is fixedly connected to the asbestos pad.
Preferably, the bin wall vibrator is continuously in an open state during the step 3).
Preferably, a catalyst feeding pipe is connected to a bin body of the crushing mechanism, and the tail end of the catalyst feeding pipe extends out of the bin body.
Preferably, the diameter of the holes on the microporous plate is 0.5 mm; the total area of the holes on the micro-porous plate is not more than 20 percent of the total area of the micro-porous plate.
In the structure of the crushing mechanism, a groove body is used for containing the preliminarily sheared blocky tire and is used as a first crushing place; the upper cover is used for opening or closing the tank body; the first rotating shaft is used for preliminarily crushing the massive tires through the cutter on the first rotating shaft; the bin body is used for further crushing the preliminarily crushed materials; the electric push rod and the seal plate are used for controlling the closing or opening of the lower end of the trough body; the inclined pipe can be used for pumping air into the pipe body connecting the groove body and the bin body so as to assist the discharge of materials from the groove body into the bin body; the first motor is used for driving the second rotating shaft to further crush the materials; the discharge opening is used for discharging the secondarily crushed materials.
In the structure of the reaction kettle, the kettle body is used for containing tire particles to be pyrolyzed; the outer sleeve and the embedded pipe jointly form a structure similar to a piston; the embedded pipe can be used for adding tire particles to be pyrolyzed into the kettle body, or performing air exhaust and pressure reduction under the state that the kettle body is sealed, and an end cover at the upper end of the embedded pipe can seal the upper end of the embedded pipe; the fixing ring in the outer sleeve and the wide mouth at the lower end of the embedded pipe can have the joint and sealing effect, so that when the embedded pipe is lifted up, the kettle body is sealed; the bypass pipe can be used for injecting nitrogen into the kettle body for protection when the fixing ring and the wide mouth are loosened; the second motor and the stirring rod can be used for stirring the materials in the pyrolysis process according to the process requirements; the microporous plate bears the tire particles before pyrolysis, after pyrolysis is completed, oil obtained by pyrolysis leaks downwards to the bottom end of the kettle body from holes in the microporous plate through the pressurization effect at the embedded pipe and is discharged from the oil discharge pipe, and a solid phase is retained on the microporous plate; the electric heating ring is used for heating the kettle body.
The invention provides a high-molecular micro-negative pressure thermal cracking method for waste tires. In this technical scheme, at first carry out structural improvement to the pyrolysis system according to the technology demand, set up dedicated crushing mechanism for the cubic tire of preliminary shearing on the one hand, on the other hand has designed the reation kettle who is exclusively used in the pyrolysis of little negative pressure. Specifically, the block tire is directly subjected to two-stage crushing, crushed materials are injected onto a microporous plate in a kettle body through an embedded pipe of the reaction kettle, then the kettle body is sealed, the temperature is raised to about 120 ℃ at a low speed under the condition of micro negative pressure, the temperature is changed into deep negative pressure after being kept for a period of time, the temperature is raised to 450 ℃ at a higher temperature raising speed, nitrogen protection is carried out, continuous pyrolysis is carried out under the condition of reduced pressure, oil subjected to pyrolysis can be discharged downwards through the microporous plate under the condition of pressurization, a solid phase is remained on the microporous plate, and after drying and grinding, existing metal wires in the tire exist in a granular shape or a sheet shape and can be removed through screening. By applying the invention, the whole process of tire crushing, pyrolysis and material receiving can be finished in a consistent manner, and the mechanization level of a pyrolysis system is obviously improved; meanwhile, the process condition is finished at a lower temperature, which is beneficial to improving the sufficiency of pyrolysis and reducing the occurrence rate of side reaction; in addition, the process omits a metal wire stripping link, and obviously improves the continuity and the process efficiency of the pyrolysis process.
Drawings
FIG. 1 is a sectional view of the entire shredder mechanism of the present invention from a front perspective;
FIG. 2 is a sectional view of the crushing mechanism as a whole from a left side view in the present invention;
FIG. 3 is a top view of the shredder mechanism of the present invention at the power push bar;
FIG. 4 is a sectional view of the whole reaction vessel in the present invention;
FIG. 5 is a partial structural view of a stirring rod of the reaction vessel in the present invention;
FIG. 6 is a partial structural view of a vessel body of the reaction vessel in the present invention;
in the figure:
| 1. |
2. |
3. First rotating |
4. Storehouse |
| 5. |
6. |
7. Inclined |
8. |
| 9. Second rotating |
10. Discharge opening | 11. Kettle |
12. |
| 13. Fixing |
14. Embedded |
15. |
16. |
| 17. Second |
18. Stirring |
19. |
20. |
| 21. |
22. |
23. A catalyst feeding pipe. |
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
A macromolecule micro-negative pressure thermal cracking method for waste tires comprises the following steps:
1) adding a blocky tire into a groove body 1 of a crushing mechanism, simultaneously driving a sealing plate 6 to seal the bottom end of the groove body 1 by using an electric push rod 5, starting a first rotating shaft 3 to crush the blocky tire to a granularity smaller than 40 meshes, then opening the sealing plate 6, inputting crushed tire particles into a bin body 4, starting a first motor 8 to drive a second rotating shaft 9 to rotate, further crushing the material, and then discharging the material from a discharge opening 10;
2) injecting the discharged materials into the kettle body 11 from the embedded pipe 14 of the reaction kettle, enabling the materials to be flatly paved on the microporous plate 19, lifting the embedded pipe 14, enabling the wide mouth 15 to be attached to the fixing ring 13, exhausting air from the port of the upper end of the embedded pipe 14 for pressure reduction, then closing the end cover of the upper end of the embedded pipe 14, starting the second motor 17, enabling the materials on the microporous plate 19 to be continuously stirred by the stirring rod 18, and simultaneously starting the electric heating ring 20 to heat the kettle body 11;
3) under the pressure of 0.8 atmospheric pressure, heating from normal temperature to 120 ℃ at the heating rate of 11.5 ℃/min, and then keeping the temperature within the temperature range of 110-130 ℃ for 30 min; stopping stirring, further reducing the pressure to 0.2 atmospheric pressure, and then continuously heating to 450 ℃ at the heating speed of 35 ℃/min; pushing down the embedded pipe 14, loosening the seal between the wide opening 15 and the fixing ring 13, injecting nitrogen into the kettle body 11 from the bypass pipe 16, then lifting up the embedded pipe 14 to seal the wide opening 15 and the fixing ring 13 again, extracting air from the port at the upper end of the embedded pipe 14, reducing the pressure to 0.5 atmospheric pressure, and keeping the temperature at 450 ℃ for 8 hours;
4) and (3) closing the electric heating ring 20, naturally cooling to normal temperature, opening a valve on the oil discharge pipe 21, pressurizing the kettle body 11 from the port at the upper end of the embedded pipe 14, pushing the oil obtained by pyrolysis on the microporous plate 19 down to the bottom end of the kettle body 11, discharging the oil from the oil discharge pipe 21, opening the kettle body 11, scraping the solid phase on the microporous plate 19, and drying to obtain the carbon black.
As shown in fig. 1 to 3, the crushing mechanism includes a tank body 1, an upper cover 2, a first rotating shaft 3, a tank body 4, an electric push rod 5, a seal plate 6, an inclined pipe 7, a first motor 8, a second rotating shaft 9, and a discharge opening 10, wherein the upper end of the tank body 1 is hinged with the upper cover 2, the inner side of the upper cover 2 is connected with the first rotating shaft 3, the lower end of the tank body 1 is communicated with the upper end of the tank body 4 through a pipe body, the side wall of the pipe body is connected with the seal plate 6 through the electric push rod 5, and the side wall of the pipe body is connected with the inclined pipe 7; a second rotating shaft 9 is arranged in the bin body 4, the second rotating shaft 9 is in transmission connection with a first motor 8, a discharge opening 10 is formed in the bottom end of the bin body 4, and cutters are fixedly connected to the outer walls of the first rotating shaft 3 and the second rotating shaft 9.
As shown in fig. 4 to 6, the reaction kettle comprises a kettle body 11, an outer sleeve 12, a fixing ring 13, an embedded pipe 14, a wide mouth 15, a bypass pipe 16, a second motor 17, a stirring rod 18, a microporous plate 19, an electric heating ring 20 and an oil discharge pipe 21, wherein the top end of the kettle body 11 is connected with the outer sleeve 12, the embedded pipe 14 is inserted in the outer sleeve 12, the fixing ring 13 is fixedly connected on the inner wall of the outer sleeve 12, the wide mouth 15 is fixedly connected at the lower end of the embedded pipe 14, the bypass pipe 16 is connected on the side wall of the outer sleeve 12, the second motor 17 is connected at the top end of the kettle body 11, the stirring rod 18 is in transmission connection with the second motor 17, the stirring rod 18 is inserted in the kettle body 11, the microporous plate 19 is fixedly connected in the kettle body 11, the electric heating ring 20 is connected on the side wall of the kettle body 11, the oil discharge pipe 21 is connected at the bottom end of the kettle body 11, and the top end, a valve is provided in the oil drain pipe 21.
Further comprising the following step 5): grinding the carbon black obtained in the step 4) by using a grinder, and then sieving by using a 320-mesh sieve, wherein the sieved matter is carbon black powder, and the intercepted matter is metal. The cooling speed in the step 4) is not higher than 25 ℃/min. The second rotating shafts 9 of the crushing mechanism are two and are parallel to each other. Still include bulkhead vibrator 22, fixedly connected with asbestos pad on the cauldron body 11 outer wall of reation kettle, bulkhead vibrator 22 fixed connection be in asbestos pad is filled up. The bin wall vibrator 22 is continuously in an open state during the process of step 3). A catalyst feeding pipe 23 is connected in the cabin body 4 of the crushing mechanism, and the tail end of the catalyst feeding pipe 23 extends out of the cabin body 4. The diameter of the holes on the micropore plate 19 is 0.5 mm; the total area of the holes in the micro-perforated plate 19 is not more than 20% of the total area of the micro-perforated plate 19.
Example 2
A macromolecule micro-negative pressure thermal cracking method for waste tires comprises the following steps:
1) adding a blocky tire into a groove body 1 of a crushing mechanism, simultaneously driving a sealing plate 6 to seal the bottom end of the groove body 1 by using an electric push rod 5, starting a first rotating shaft 3 to crush the blocky tire to a granularity smaller than 40 meshes, then opening the sealing plate 6, inputting crushed tire particles into a bin body 4, starting a first motor 8 to drive a second rotating shaft 9 to rotate, further crushing the material, and then discharging the material from a discharge opening 10;
2) injecting the discharged materials into the kettle body 11 from the embedded pipe 14 of the reaction kettle, enabling the materials to be flatly paved on the microporous plate 19, lifting the embedded pipe 14, enabling the wide mouth 15 to be attached to the fixing ring 13, exhausting air from the port of the upper end of the embedded pipe 14 for pressure reduction, then closing the end cover of the upper end of the embedded pipe 14, starting the second motor 17, enabling the materials on the microporous plate 19 to be continuously stirred by the stirring rod 18, and simultaneously starting the electric heating ring 20 to heat the kettle body 11;
3) under the pressure of 0.8 atmospheric pressure, heating from normal temperature to 120 ℃ at the heating rate of 11.5 ℃/min, and then keeping the temperature within the temperature range of 110-130 ℃ for 30 min; stopping stirring, further reducing the pressure to 0.2 atmospheric pressure, and then continuously heating to 450 ℃ at the heating speed of 35 ℃/min; pushing down the embedded pipe 14, loosening the seal between the wide opening 15 and the fixing ring 13, injecting nitrogen into the kettle body 11 from the bypass pipe 16, then lifting up the embedded pipe 14 to seal the wide opening 15 and the fixing ring 13 again, extracting air from the port at the upper end of the embedded pipe 14, reducing the pressure to 0.5 atmospheric pressure, and keeping the temperature at 450 ℃ for 8 hours;
4) and (3) closing the electric heating ring 20, naturally cooling to normal temperature, opening a valve on the oil discharge pipe 21, pressurizing the kettle body 11 from the port at the upper end of the embedded pipe 14, pushing the oil obtained by pyrolysis on the microporous plate 19 down to the bottom end of the kettle body 11, discharging the oil from the oil discharge pipe 21, opening the kettle body 11, scraping the solid phase on the microporous plate 19, and drying to obtain the carbon black.
The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A macromolecule micro negative pressure thermal cracking method for waste tires is characterized by comprising the following steps:
1) adding a blocky tire into a groove body (1) of a crushing mechanism, simultaneously driving a sealing plate (6) by using an electric push rod (5) to seal the bottom end of the groove body (1), starting a first rotating shaft (3), crushing the blocky tire to a granularity smaller than 40 meshes, then opening the sealing plate (6), inputting the crushed tire particles into a bin body (4), starting a first motor (8) to drive a second rotating shaft (9) to rotate, further crushing the material, and then discharging the material from a discharge opening (10);
2) injecting the discharged materials into the kettle body (11) from the embedded pipe (14) of the reaction kettle, enabling the materials to be flatly paved on the microporous plate (19), lifting the embedded pipe (14), enabling the wide mouth (15) to be attached to the fixing ring (13), exhausting air from the port at the upper end of the embedded pipe (14) for pressure reduction, then closing the end cover at the upper end of the embedded pipe (14), starting the second motor (17), enabling the materials on the microporous plate (19) to be continuously stirred by the stirring rod (18), and simultaneously starting the electric heating ring (20) to heat the kettle body (11);
3) under the pressure of 0.8 atmospheric pressure, heating from normal temperature to 120 ℃ at the heating rate of 11.5 ℃/min, and then keeping the temperature within the temperature range of 110-130 ℃ for 30 min; stopping stirring, further reducing the pressure to 0.2 atmospheric pressure, and then continuously heating to 450 ℃ at the heating speed of 35 ℃/min; pushing down the embedded pipe (14), loosening the seal between the wide mouth (15) and the fixing ring (13), flushing nitrogen into the kettle body (11) from the bypass pipe (16), then lifting up the embedded pipe (14) to seal the wide mouth (15) and the fixing ring (13) again, extracting air from the port at the upper end of the embedded pipe (14) and reducing the pressure to 0.5 atmospheric pressure, and keeping the temperature at 450 ℃ for 8 h;
4) closing the electric heating ring (20), naturally cooling to normal temperature, opening a valve on the oil discharge pipe (21), pressurizing the kettle body (11) from a port at the upper end of the embedded pipe (14), pushing the oil material obtained by pyrolysis on the microporous plate (19) down to the bottom end of the kettle body (11), discharging from the oil discharge pipe (21), opening the kettle body (11), scraping a solid phase on the microporous plate (19), and drying to obtain carbon black;
the crushing mechanism comprises a trough body (1), an upper cover (2), a first rotating shaft (3), a bin body (4), an electric push rod (5), a sealing plate (6), an inclined pipe (7), a first motor (8), a second rotating shaft (9) and a discharge opening (10), wherein the upper end of the trough body (1) is hinged with the upper cover (2), the inner side of the upper cover (2) is connected with the first rotating shaft (3), the lower end of the trough body (1) is communicated with the upper end of the bin body (4) through a pipe body, the side wall of the pipe body is connected with the sealing plate (6) through the electric push rod (5), and the side wall of the pipe body is connected with the inclined pipe (7); a second rotating shaft (9) is arranged in the bin body (4), the second rotating shaft (9) is in transmission connection with a first motor (8), a discharge opening (10) is formed in the bottom end of the bin body (4), and cutters are fixedly connected to the outer walls of the first rotating shaft (3) and the second rotating shaft (9);
the reaction kettle comprises a kettle body (11), an outer sleeve (12), a fixing ring (13), an embedded pipe (14), a wide-mouth (15), a bypass pipe (16), a second motor (17), a stirring rod (18), a microporous plate (19), an electric heating ring (20) and an oil discharge pipe (21), wherein the top end of the kettle body (11) is connected with the outer sleeve (12), the embedded pipe (14) is inserted in the outer sleeve (12), the fixing ring (13) is fixedly connected on the inner wall of the outer sleeve (12), the wide-mouth (15) is fixedly connected at the lower end of the embedded pipe (14), the bypass pipe (16) is connected on the side wall of the outer sleeve (12), the second motor (17) is connected at the top end of the kettle body (11), the stirring rod (18) is in transmission connection with the second motor (17), the stirring rod (18) is inserted in the kettle body (11), and the microporous plate (19) is fixedly connected in the kettle body (11), the side wall of the kettle body (11) is connected with an electric heating ring (20), the bottom end of the kettle body (11) is connected with an oil discharge pipe (21), the top end of the embedded pipe (14) is connected with an end cover, and a valve is arranged on the oil discharge pipe (21).
2. The method of claim 1, further comprising the step 5 of: grinding the carbon black obtained in the step 4) by using a grinder, and then sieving by using a 320-mesh sieve, wherein the sieved matter is carbon black powder, and the intercepted matter is metal.
3. The method of claim 1, wherein the temperature reduction rate in step 4) is not higher than 25 ℃/min.
4. The method of claim 1, wherein the second shafts (9) of the shredding mechanism are parallel to each other.
5. The micro negative pressure thermal cracking method for waste tires according to claim 1, further comprising a bin wall vibrator (22), wherein an asbestos pad is fixedly connected to the outer wall of the autoclave body (11) of the autoclave, and the bin wall vibrator (22) is fixedly connected to the asbestos pad.
6. The method of claim 5, wherein the bin wall vibrator (22) is continuously turned on during the step 3).
7. The method as claimed in claim 1, wherein a catalyst feeding tube (23) is connected to the bin (4) of the shredding mechanism, and the end of the catalyst feeding tube (23) extends out of the bin (4).
8. The method for micro negative pressure thermal cracking of polymer for waste tire as claimed in claim 1, wherein the diameter of the hole on the micro porous plate (19) is 0.5 mm; the total area of the holes on the micro-porous plate (19) is not more than 20 percent of the total area of the micro-porous plate (19).
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| CN205033619U (en) * | 2015-08-22 | 2016-02-17 | 王坤明 | High -efficient oil press with damping device |
| CN204911518U (en) * | 2015-09-04 | 2015-12-30 | 江苏欣舟化工科技有限公司 | Two agitation reactors |
| CN105694942A (en) * | 2016-04-21 | 2016-06-22 | 陕西延长石油（集团）有限责任公司 | Method for preparing high aromatic liquefied oil by two-step catalytic pyrolysis of waste rubber |
| CN106938186A (en) * | 2017-04-27 | 2017-07-11 | 盐城亿之诺机械有限公司 | The quick reactor of one kind stirring |
| CN107760354A (en) * | 2017-11-20 | 2018-03-06 | 叶子毓 | The continuous cracking device and application method of a kind of waste old |
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