CN110653967A

CN110653967A - Waste rubber regeneration continuous production line

Info

Publication number: CN110653967A
Application number: CN201911131654.7A
Authority: CN
Inventors: 杨庆利
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-01-07

Abstract

The invention relates to a waste rubber regeneration continuous production line, which comprises a rubber powder bin, a rubber powder preheating and lifting device, a softening agent heating tank, an oil powder mixing and conveying device, a heating and plasticizing part and a cooling and kneading part, wherein the rubber powder preheating and lifting device is arranged on the rubber powder bin; the bottom of the rubber powder bin is provided with a rubber powder conveying auger, rubber powder in the rubber powder bin sequentially enters an oil powder mixing and conveying device through the rubber powder conveying auger and a rubber powder preheating and lifting device, a gear pump pumps a softener in a softener heating tank into the oil powder mixing and conveying device, and a mixed material in the oil powder mixing and conveying device sequentially passes through a heating plasticizing part and a cooling kneading part to realize desulfurization plasticizing and kneading; by adopting the technical scheme, automatic continuous accurate feeding is realized, human intervention is avoided, and a foundation is laid for improving the stability of product quality; the oil-powder mixing and conveying device also realizes the heat preservation function on the basis of realizing the material mixing function, simplifies the equipment structure and reduces the equipment floor area.

Description

Waste rubber regeneration continuous production line

Technical Field

The invention relates to the technical field of waste rubber regeneration, in particular to a waste rubber regeneration continuous production line.

Background

11/6/2019, a website of national improvement and reform committee publishes an industrial structure adjustment guidance catalogue (2019), which is implemented from 1/2020, and the catalogue definitely encourages the technology and application of waste rubber recycling, encourages the construction of regional waste tire recycling bases, and definitely determines that production devices of the regenerated rubber except for the normal-pressure continuous desulfurization process are all restricted, and aims to promote the high-quality development of the manufacturing industry and accelerate the improvement of the traditional industry.

The specification of the chinese patent CN109485914A discloses a waste rubber regeneration production line, which is a normal pressure continuous desulfurization production line, and includes a material bearing device (rubber powder scale and auxiliary agent scale), a mixing device (high mixing machine), a material heat preservation device (heat preservation bin), a feeding device (heat preservation material lifting machine), a heating plasticizing device and a cooling kneading device, and the waste rubber regeneration production line has the following disadvantages: mixing of raw rubber powder of waste rubber and a softening agent is usually completed in a mixer in the feeding process, heat preservation of mixed materials is usually completed in a heat preservation bin, the occupied area of equipment is large, the raw rubber powder and the softening agent need to bear loads respectively before mixing, manual intervention is needed, and real continuous feeding is not achieved; the heating and plasticizing process is generally carried slowly by a traditional screw conveyor, the rotating speed is slow and is about 5-20 r/min, and the stirring effect is basically difficult to embody, so that the materials are heated unevenly, the carbonization phenomenon is easy to generate, and the performance of the subsequent processing technology is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of making up the defects of the prior art and provide a waste rubber regeneration continuous production line.

To solve the technical problems, the technical scheme of the invention is as follows: a waste rubber regeneration continuous production line comprises a heating plasticizing part and a cooling kneading part, wherein a discharge port of the heating plasticizing part is hermetically connected with a feed port of the cooling kneading part, and the waste rubber regeneration continuous production line also comprises a rubber powder bin, a rubber powder preheating and lifting device, a softener heating tank and an oil powder mixing and conveying device; a rubber powder conveying auger is arranged at the discharge port of the rubber powder bin and used for conveying raw rubber powder in the rubber powder bin to a feed port of a rubber powder preheating and lifting device; the oil powder mixing and conveying device comprises a pipeline and a stirring and conveying auger, and a rubber powder feeding hole, a softener feeding hole and a discharging hole are formed in the pipeline of the oil powder mixing and conveying device; the rubber powder preheating and lifting device comprises a pipeline and an auger, and a discharge port of the rubber powder preheating and lifting device is hermetically connected with a rubber powder feed port of the oil powder mixing and conveying device; the softening agent heating tank is hermetically connected with a softening agent feeding port of the oil powder mixing and conveying device through a gear pump and a pipeline; and heating devices are arranged on the pipeline of the rubber powder preheating and lifting device and the pipeline of the oil powder mixing and conveying device, and a discharge port of the oil powder mixing and conveying device is hermetically connected with a feed port of the heating and plasticizing part.

Furthermore, the heating and plasticizing part comprises a first section of heating and plasticizing device, a second section of heating and plasticizing device and a third section of heating and plasticizing device which are sequentially connected in a sealing manner according to the feeding and discharging order, a feeding port of the first section of heating and plasticizing device is connected with a discharging port of the oil-powder mixing and conveying device in a sealing manner, and a discharging port of the third section of heating and plasticizing device is connected with a feeding port of the cooling and kneading part in a sealing manner.

Further, the cooling kneading part comprises a first section of cooling kneading device and a second section of cooling kneading device, a feeding port of the first section of cooling kneading device is hermetically connected with a discharging port of the heating plasticizing part, and a discharging port of the first section of cooling kneading device is hermetically connected with a feeding port of the second section of cooling kneading device.

Further, the motor of the rubber powder conveying auger is a variable frequency motor, the first section of heating plasticizing device, the second section of heating plasticizing device, the third section of heating plasticizing device, the first section of cooling kneading device and the second section of cooling kneading device respectively comprise a pipeline and a novel auger, the novel auger comprises a shaft A, a helical blade A and a plurality of small connecting plates A, the diameter of an inscribed cylinder of the helical blade A is larger than the outer diameter of the shaft A, the helical blade A is coaxial with the shaft A and is welded into a whole through the small connecting plates A, a channel M is formed between the inner wall of the helical blade A and the outer cylindrical wall of the shaft A, and a channel N is formed between the helical blade A and the inner wall of the pipeline; the motor of the novel auger of the first section cooling kneading device is a variable frequency motor, the pipelines of the first section heating plasticizing device, the second section heating plasticizing device and the third section heating plasticizing device are all provided with heating devices, and the pipelines of the first section cooling kneading device and the second section cooling kneading device are all provided with water cooling channels.

Furthermore, the thickness of the helical blade A of the novel screw is 20-80 mm.

Further, the thickness of the helical blade A of the novel screw is 40 mm.

Further, oil powder mixing conveyor's stirring transport screw feeder includes axle C and a plurality of helical blade C, and a plurality of helical blade C equidistant welding is equipped with the stirring rod between the adjacent helical blade C on axle C, and the stirring rod welding is on axle C.

Furthermore, the inner wall surfaces of the pipelines of the rubber powder preheating and lifting device, the oil powder mixing and conveying device, the first section heating and plasticizing device, the second section heating and plasticizing device, the third section heating and plasticizing device, the first section cooling and kneading device and the second section cooling and kneading device are plated with chromium coatings through a hard chromium plating process.

Further, the outer surfaces of the rubber powder conveying auger, the oil powder mixing and conveying device and the novel auger are plated with chromium coatings through a hard chromium plating process.

Further, the bottom of the rubber powder bin 1 is provided with an automatic weighing meter GA, and the bottom of the softening agent heating tank 4 is provided with an automatic weighing meter GB.

The invention can achieve the following beneficial effects:

1) continuous feeding of raw rubber powder is realized through matching use of the rubber powder bin, the rubber powder conveying auger and the rubber powder preheating lifting device, continuous feeding of a softening agent is realized through matching use of the softening agent heating tank and the gear pump, manual intervention in the feeding process is avoided, accurate feeding is realized, and a foundation is laid for improving stability of product quality;

2) the pipeline of the rubber powder preheating and lifting device is provided with a heating device, so that the raw rubber powder is preheated in advance, and the mixing performance of the raw rubber powder and a softener is improved;

3) the heating device is arranged on the pipeline of the oil-powder mixing and conveying device, so that the heat preservation function is realized on the basis of realizing the material mixing function, and the discharging temperature can be kept balanced;

4) the novel auger is provided with the channel M, so that the material backflow can be realized while the plasticizing discharge flow is controlled, the rotating speed of the novel auger can be greatly increased, the increase range can be 5-10 times of the rotating speed of the auger in the prior art, the dual functions of feeding and stirring are realized, and the material carbonization phenomenon is effectively avoided;

5) after the thickness of the helical blade A13 is widened, the materials can be circularly extruded and kneaded in the channel N, the extruding and kneading effects similar to those of a kneading machine are obtained, and the plasticizing effect is further improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure of an oil-powder mixing and conveying device, a heating plasticizing part and a cooling kneading part in the embodiment of the invention;

FIG. 3 is a schematic view of a part of the structure of the novel screw conveyor in the embodiment of the invention;

FIG. 4 is a schematic diagram of channel M and channel N in an embodiment of the present invention;

FIG. 5 is a partial structural schematic view of a conventional screw;

FIG. 6 is a schematic view of a part of the structure of a stirring and conveying auger of the oil-powder mixing and conveying apparatus in this embodiment;

in the figure: 1-rubber powder bin, 2-rubber powder conveying auger, 3-rubber powder preheating and lifting device, 4-softener heating tank, 5-gear pump, 6-oil powder mixing and conveying device, 7-first section heating and plasticizing device, 8-second section heating and plasticizing device, 9-third section heating and plasticizing device, 10-first section cooling and kneading device, 11-second section cooling and kneading device, 12-shaft A, 13-helical blade A, 14-small connecting plate A, 15-pipeline, 16-shaft B, 17-helical blade B, 18-shaft C, 19-helical blade C, 20-stirring rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Examples

As shown in the attached figure 1, the waste rubber regeneration continuous production line comprises a rubber powder bin 1, a rubber powder preheating and lifting device 3, a softening agent heating tank 4, an oil powder mixing and conveying device 6, a heating and plasticizing part, a cooling and kneading part and a control system.

The discharge gate department in rubber powder storehouse 1 is equipped with rubber powder and carries screw feeder 2, and rubber powder carries screw feeder 2 to be used for carrying the crude rubber powder in the rubber powder storehouse 1 to the feed inlet of rubber powder preheating and lifting device 3, and the motor of rubber powder transport screw feeder 2 is inverter motor, and the bottom in rubber powder storehouse 1 is equipped with automatic weighing meter GA.

Oil powder mixes conveyor 6 and includes the pipeline and stirs the transport screw feeder, be equipped with heating device on the pipeline, be equipped with the rubber powder feed inlet on the pipeline, softener feed inlet and discharge gate, the stirring is carried the screw feeder and is included axle C18 and a plurality of helical blade C19, as shown in fig. 6, a plurality of helical blade C19 equidistant welding is on axle C18, be equipped with stirring rod 20 between the adjacent helical blade C19, stirring rod 20 welding is on axle C18, the stirring of this kind of structure is carried the screw feeder and has both realized the function of stirring, also can realize the function of pay-off.

The rubber powder preheating and lifting device 3 comprises a pipeline and an auger, a heating device is arranged on the pipeline of the rubber powder preheating and lifting device 3, and a discharge port of the rubber powder preheating and lifting device 3 is hermetically connected with a rubber powder feed port of the oil powder mixing and conveying device 6.

The softener heating tank 4 is hermetically connected with a softener feed inlet of the oil powder mixing and conveying device 6 through a gear pump 5 and a pipeline, the gear pump 5 is a variable frequency gear pump, and the bottom of the softener heating tank 4 is provided with an automatic weighing meter GB.

The rubber powder conveying auger 2 and the auger of the rubber powder preheating lifting device 3 are both conventional augers, that is, as shown in figure 5, a helical blade B17 is coaxially welded with a shaft B16, the diameter of an inscribed cylinder of the helical blade B17 is equal to the diameter of an outer cylinder of the shaft B16, and the auger with the structure is used for feeding materials only for realizing the function of forward pushing.

As shown in fig. 2, the heating and plasticizing part comprises a first section of heating and plasticizing device 7, a second section of heating and plasticizing device 8 and a third section of heating and plasticizing device 9 which are hermetically connected in sequence according to a feeding and discharging order, and the cooling and kneading part comprises a first section of cooling and kneading device 10 and a second section of cooling and kneading device 11 which are hermetically connected in sequence according to a feeding and discharging order; the first section of heating plasticizing device 7, the second section of heating plasticizing device 8, the third section of heating plasticizing device 9, the first section of cooling kneading device 10 and the second section of cooling kneading device 11 all comprise a pipeline 15 and a novel auger, as shown in fig. 3, the novel auger comprises a shaft A12, a helical blade A13 and a plurality of small connecting plates A14, the diameter of an inscribed cylinder of the helical blade A13 is larger than the outer diameter of the shaft A12, the helical blade A13 is coaxial with the shaft A12 and is welded into a whole through the plurality of small connecting plates A14, a channel M is formed between the inner wall of the helical blade A13 and the outer cylindrical wall of the shaft A12, and a channel N is formed between the helical blade A13 and the inner wall of the pipeline 15, as shown in fig. 4; the motor of the novel auger of the first section cooling kneading device 10 is a variable frequency motor, the pipelines 15 of the first section heating plasticizing device 7, the second section heating plasticizing device 8 and the third section heating plasticizing device 9 are all provided with heating devices, and the pipelines 15 of the first section cooling kneading device 10 and the second section cooling kneading device 11 are all provided with water cooling channels.

The advantage of the channel M setting: in the heating plastify process, the material can realize the dual function of pay-off and stirring simultaneously through passageway M backward flow, can improve the rotational speed by a wide margin, and the range of improvement can be up to 5 ~ 10 times of screw feeder rotational speed among the prior art, effectively avoids material carbonization phenomenon.

In order to further improve the quality of desulfurization and plasticization, reduce mooney viscosity and improve subsequent processability, the novel auger in the embodiment is optimally designed, and compared with the conventional auger in the prior art, the thickness of the helical blade a13 is greatly increased, the thickness of the helical blade a13 can be selectively set between 20mm and 80mm, and the preferred thickness of the helical blade a13 in the embodiment is 40 mm; the thickness of the helical blade B17 of conventional screw feeder generally can not exceed 10mm, when realizing defeated material function, the corresponding relation of its outer wall and pipeline is close to "line to face" relation, the reaction effect that the material obtained because of receiving the extrusion between the outer wall of helical blade B17 and the inner wall of pipeline can be ignored, after widening the thickness of helical blade A13 in this embodiment, the material can realize circulation extrusion, kneading in the passageway N between the outer wall of helical blade A13 and the inner wall of pipeline 15, obtain extrusion, kneading effect similar to kneading machine, the plastify effect has obtained further improvement.

The discharge hole of the oil powder mixing and conveying device 6 is hermetically connected with the feed inlet of the first section heating and plasticizing device 7.

The inner wall surfaces of the pipelines of the rubber powder preheating and lifting device 3, the oil powder mixing and conveying device 6, the first section heating and plasticizing device 7, the second section heating and plasticizing device 8, the third section heating and plasticizing device 9, the first section cooling and kneading device 10 and the second section cooling and kneading device 11 are plated with chromium coatings by a hard chromium plating process; the rubber powder conveying auger 2, the oil powder mixing and conveying device 6 and the outer surfaces of the spiral blades of the novel auger are plated with chromium coatings by a hard chromium plating process; the purpose of hard chromium plating is to improve the wear resistance and corrosion resistance of parts, reduce the failure rate of equipment and prolong the service life of the equipment.

Use of this example:

1) putting a large amount of crude rubber powder of waste rubber into a rubber powder bin 1, and putting a large amount of softening agent into a softening agent heating tank 4 for heating;

2) the rubber powder preheating and lifting device 3, the oil powder mixing and conveying device 6, the first section heating and plasticizing device 7, the second section heating and plasticizing device 8 and the third section heating and plasticizing device 9 are preheated for a certain time;

3) controlling a rubber powder conveying auger 2, a gear pump 5, a rubber powder preheating and lifting device 3 and an oil powder mixing and conveying device 6 to operate at a normal speed, controlling a first section heating plasticizing device 7, a second section heating plasticizing device 8 and a third section heating plasticizing device 9 to operate at a high speed (the rotating speed range can be any value between 50 and 100r/min, and a person skilled in the art can set the rotating speed according to actual production needs), controlling the augers in a first section cooling kneading device 10 and a second section cooling kneading device 11 not to operate, and controlling the flow rate of raw rubber powder at the outlet of the rubber powder conveying auger 2 to be matched with the flow rate of a softener at the outlet of the gear pump;

4) after the rubber powder conveying auger 2 operates for a certain time (the arrangement of the certain time is based on the condition that the materials in the first section heating plasticizing device 7, the second section heating plasticizing device 8 and the third section heating plasticizing device 9 are all in a basically full cavity state, the materials can be monitored by an automatic weighing meter GA and an automatic weighing meter GB, the real-time rotating speeds of the rubber powder conveying auger 2 and the gear pump 5 can be controlled, and technicians in the field can select the materials according to actual design conditions), the rubber powder conveying auger 2 is controlled to operate at a low speed, the rubber powder preheating lifting device 3 and the oil powder mixing conveying device 6 operate at a normal speed, the first section heating plasticizing device 7, the second section of heating plasticizing device 8 and the third section of heating plasticizing device 9 run at high speed, the gear pump 5 runs at low flow, the auger in the first section of cooling kneading device 10 runs at low speed, and the auger in the second section of cooling kneading device 11 runs at normal speed; the discharge flow of the rubber powder conveying auger 2 is matched with the discharge flow of the gear pump 5, and the discharge flow of the rubber powder conveying auger 2 is matched with the discharge flow of the second section of cooling kneading device 11; the low-speed operation of the auger in the first section of cooling kneading device 10 is equivalent to the limitation of the discharge flow of the third section of heating and plasticizing device 9, and the materials in the first section of heating and plasticizing device 7, the second section of heating and plasticizing device 8 and the third section of heating and plasticizing device 9 which operate at high speed can repeatedly flow back, so that the triple functions of conveying, stirring, circular extrusion and kneading are realized.

In the description of the present invention, words such as "inner", "outer", "upper", "lower", "front", "rear", etc., indicating orientations or positional relationships, are used for convenience in describing the present invention, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The above description is only one embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention.

Claims

1. The utility model provides a waste rubber regeneration continuous production line, includes heating plastify part and cooling kneading part, the discharge gate of heating plastify part and the pan feeding mouth sealing connection of cooling kneading part, characterized by: the rubber powder preheating and lifting device comprises a rubber powder bin (1), a rubber powder preheating and lifting device (3), a softening agent heating tank (4) and an oil powder mixing and conveying device (6); a rubber powder conveying auger (2) is arranged at a discharge port of the rubber powder bin (1), and the rubber powder conveying auger (2) is used for conveying raw rubber powder in the rubber powder bin (1) to a feed port of the rubber powder preheating lifting device (3); the oil powder mixing and conveying device (6) comprises a pipeline and a stirring and conveying auger, and a rubber powder feeding hole, a softener feeding hole and a discharging hole are formed in the pipeline of the oil powder mixing and conveying device (6); the rubber powder preheating and lifting device (3) comprises a pipeline and an auger, and a discharge hole of the rubber powder preheating and lifting device (3) is hermetically connected with a rubber powder feed hole of the oil powder mixing and conveying device (6); the softening agent heating tank (4) is hermetically connected with a softening agent feeding port of the oil powder mixing and conveying device (6) through a gear pump (5) and a pipeline; heating devices are arranged on a pipeline of the rubber powder preheating lifting device (3) and a pipeline of the oil powder mixing and conveying device (6), and a discharge port of the oil powder mixing and conveying device (6) is in sealing connection with a feed port of the heating and plasticizing part.

2. The continuous production line for recycling waste rubber according to claim 1, characterized in that: the heating and plasticizing part comprises a first section heating and plasticizing device (7), a second section heating and plasticizing device (8) and a third section heating and plasticizing device (9) which are sequentially connected in a sealing manner according to the feeding and discharging order, a feeding port of the first section heating and plasticizing device (7) is connected with a discharging port of the oil-powder mixing and conveying device (6) in a sealing manner, and a discharging port of the third section heating and plasticizing device (9) is connected with a feeding port of the cooling kneading part in a sealing manner.

3. The continuous production line for recycling waste rubber according to claim 1 or 2, characterized in that: the cooling kneading part comprises a first section cooling kneading device (10) and a second section cooling kneading device (11), a feeding port of the first section cooling kneading device (10) is in sealing connection with a discharging port of the heating plasticizing part, and a discharging port of the first section cooling kneading device (10) is in sealing connection with a feeding port of the second section cooling kneading device (11).

4. The continuous production line for recycling waste rubber according to claim 3, characterized in that: the rubber powder conveying auger (2) is characterized in that a motor of the rubber powder conveying auger (2) is a variable frequency motor, the first section of heating plasticizing device (7), the second section of heating plasticizing device (8), the third section of heating plasticizing device (9), the first section of cooling kneading device (10) and the second section of cooling kneading device (11) respectively comprise a pipeline and a novel auger, the novel auger comprises a shaft A (12), a helical blade A (13) and a plurality of small connecting plates A (14), the diameter of an inscribed cylinder of the helical blade A (13) is larger than the outer diameter of the shaft A (12), the helical blade A (13) is coaxial with the shaft A (12) and is welded into a whole through the small connecting plates A (14), a channel M is formed between the inner wall of the helical blade A (13) and the outer cylindrical wall of the shaft A (12), and a channel N is formed between the helical blade A (13) and the inner wall of the; the motor of the novel auger of the first section of cooling kneading device (10) is a variable frequency motor, the pipelines of the first section of heating plasticizing device (7), the second section of heating plasticizing device (8) and the third section of heating plasticizing device (9) are all provided with heating devices, and the pipelines of the first section of cooling kneading device (10) and the second section of cooling kneading device (11) are all provided with water cooling channels.

5. The continuous production line for recycling waste rubber according to claim 4, characterized in that: the thickness of the spiral blade A (13) of the novel screw feeder is 20-80 mm.

6. The continuous production line for recycling waste rubber according to claim 4, characterized in that: the thickness of the helical blade A (13) of the novel screw feeder is 40 mm.

7. The continuous production line for recycling waste rubber according to claim 1, characterized in that: the stirring and conveying auger of the oil-powder mixing and conveying device (6) comprises a shaft C (18) and a plurality of helical blades C (19), wherein the helical blades C (19) are welded on the shaft C (18) at equal intervals, stirring rods (20) are arranged between every two adjacent helical blades C (19), and the stirring rods (20) are welded on the shaft C (18).

8. The continuous production line for recycling waste rubber according to claim 4, characterized in that: the inner wall surfaces of the pipelines of the rubber powder preheating and lifting device (3), the oil powder mixing and conveying device (6), the first section heating and plasticizing device (7), the second section heating and plasticizing device (8), the third section heating and plasticizing device (9), the first section cooling and kneading device (10) and the second section cooling and kneading device (11) are plated with chromium coatings through a hard chromium plating process.

9. The continuous production line for recycling waste rubber according to claim 4, characterized in that: the outer surfaces of the rubber powder conveying auger (2), the oil powder mixing and conveying device (6) and the outer surfaces of the spiral blades of the novel auger are plated with chromium coatings through a hard chromium plating process.

10. The continuous production line for recycling waste rubber according to claim 1, characterized in that: the bottom of the rubber powder bin (1) is provided with an automatic weighing meter GA, and the bottom of the softening agent heating tank (4) is provided with an automatic weighing meter GB.