CN202157045U - Double-screw rubber devulcanizing device - Google Patents
Double-screw rubber devulcanizing device Download PDFInfo
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- CN202157045U CN202157045U CN2011202611603U CN201120261160U CN202157045U CN 202157045 U CN202157045 U CN 202157045U CN 2011202611603 U CN2011202611603 U CN 2011202611603U CN 201120261160 U CN201120261160 U CN 201120261160U CN 202157045 U CN202157045 U CN 202157045U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The utility model relates to a double-screw rubber devulcanizing device, which is provided with a drum, two screws and a heating device. The two screws are arranged in the drum and mesh to each other in the same direction, the drum is provided with a feed inlet, each screw comprises a feeding and conveying section with compression ratio, two or more discontinuous extruding and cutting sections, a screw transition section and a mixing section, and the screw transition section and the mixing section are arranged between two adjacent extruding and cutting sections. The double-screw rubber devulcanizing device solves the technical problem of serious pollution, high equipment requirements and energy consumption of the existing rubber devulcanizing technology.
Description
Technical field
The utility model relates to the recycling field of waste rubber, is specifically related to the device that the waste rubber desulfurization prepares shoddy.
Background technology
Global consumption of rubber was 2,370 ten thousand tons in 2010, consumed first big country and China is world's rubber.According to Beijing Zhongshang Circulation Production Ability Promoting Center statistics, China's year consumption of rubber reaches 7,100,000 tons, accounts for 30% of global total amount consumed, and 70% tree elastomer, 40% viton need import.Regenerated rubber can replace rubber on the one hand, has alleviated the serious lack of tree elastomer; Make waste old realize recycling on the other hand, solved the waste old problem of environment pollution caused.
The recycling of China's waste rubber mainly adopts the chemsweet process technology to produce shoddy; Account for and reclaim more than 90% of waste rubber,, will use a large amount of chemical assistants in process of production because this chemsweet process is the overlap span formula; Can produce serious secondary pollution; Production environment is relatively poor, and the shoddy of producing is fair, can only be used for the production of low and middle-grade rubber items.On December 31st, 2010; Industrial information portion has issued " junked tire comprehensive utilization instruction "; Improve industrial concentration and environmental protection of enterprise and purify equipment; Progressively eliminate " little regenerated rubber " enterprise and the dynamic digester chemical desulfurization of the regenerated rubber production technique that energy consumption is high, pollution is heavy, thereby established the development trend of rubber green desulfurization Technology from national aspect.
The main technique of present domestic research and development waste old green desulfurization is technological as follows:
Lian Yongxiang etc. have reported the De-link reclaiming process research of pells in " the De.1ink reclaiming process research of pells " (2000 the 14th the 1st phases of volume of Shenyang Institute of Chemical Technology journal); Method is that waste rubber obtains 10～40 order rubber powders after crushed; Under normal temperature, normal pressure, joining rubber powder then can provide in the compounding rubber of the certain mechanical shearing effect equipment (mill, Banbury mixer, milling machine), preferably joins in refiner or the fine crusher mechanical shearing 1min; Roller surface is heated up; Add the De-link regenerator then, shear mixing, after shearing mixing certain hour; Add a small amount of broken-(down)rubber and processing aid (tackifying resin etc.), can obtain having higher-strength and adhering regeneration film.This method is the chemical method desulfurization, and secondary pollution is arranged.
Utility model patent CN201610419 disclose " preparation of a kind of waste vulcanized butyl rubber desulfurization regeneration with novel mechanical ", be intended to solve the problem that existing waste vulcanized butyl rubber desulfurization regeneration is low with mechanical separator speed, the low desulfurization fusion time of pressure is grown.It is screw extrusion press and the milling machine that adopts, and screw extrusion press is the forcing machine of twin screw or three screw rods, the hopper of the discharge port butt joint screw extrusion press of milling machine.The equipment of this method is simple, prepares butyl renewable rubber but be only applicable to desulfurization.
People such as Zhang Liqun have applied for patent " a kind of method of desulphurization, disaggregation and regeneration of vulcanized rubber "; Publication number CN101503525; At first obtain supercritical co through the method that in autoclave, adds dry ice safe and efficiently; Utilize the supercritical CO 2 fluid to realize the quick free of contamination infiltration in rubber of desulfurization reagent, utilize mechanical shearing, temperature and desulfurization reagent three synergy to interrupt the cross-link bond of rubber then, thereby realize the desulfurization regeneration of rubber.The supercritical CO 2 technology that this method is used is high to equipment requirements.
CN 201040408 discloses a kind of device of devulcanization of rubber, and this device comprises kibbler, sifting machine, magnetic separator, feeding machine, microwave oven, forcing machine, filtration unit and packing apparatus.This technology is carried out microwave desulfurization through microwave oven after waste old is passed through pulverizing, screening, magnetic separation again, directly gets into the forcing machine spout by the microwave oven discharge port after the desulfurization, plastifies, lowers the temperature, filters through forcing machine, accomplishes whole process of production at last.The device category that this method is used is many, and power consumption is big.
CN2059872 discloses a kind of devulcanization of rubber forcing machine, and its extrusion screw is the screw rod that a kind of two start screw and major and minor threaded segments are provided with, and employing is connected the head of truncated cone-shaped core with bearing with screw rod.This machine of utilization carries out desulfurization regeneration to waste old, and its quality reaches more than the shoddy national standard secondary.This method sweetening effectiveness is general, and the shoddy performance is general.
The utility model content
The technical problem that the utility model will solve is to solve the existing technical problem that the devulcanization of rubber technology is seriously polluted, equipment requirements is high, energy consumption is big.The utility model provides a kind of discontinuous extrusion shearing twin screw devulcanization of rubber technology for this reason, and method is pollution-free, equipment is simple, energy consumption is little.
The utility model provides a kind of twin screw devulcanization of rubber device; Have cylindrical shell, be positioned at the tube intravital twin screw and the heating unit of engagement in the same way; Cylindrical shell has opening for feed, and described twin screw comprises reinforced transportation section, two or more the mutual discontinuous extrusion shearing sections with compression ratio and is positioned at intersegmental screw rod transition section, the mixing section of adjacent two extrusion shearings.
Further: described extrusion shearing section is two combined shear pieces that are meshed, and the combined shear piece is made up of two or more cams that are staggeredly located out, the angle difference that staggers of its adjacent cams of combined shear piece of different extrusion shearing sections.Strong extrusion shearing be can realize between the combined shear piece that is meshed, the pulverizing and the desulfurization of rubber grain helped.The angle difference that staggers of its adjacent cams of combined shear piece of different extrusion shearing sections can realize the complete desulfurization or the partial desulfurization of rubber powder generating the mixed type shoddy that complete desulfurization and partial desulfurization coexist.
Described screw rod transition section is 2～4, and every section is 3～5 pitch.Transition section mainly plays forced conveyance and self-cleaning function, and too much transition section can cause screw slenderness ratio excessive, increases energy consumption.
The compression ratio of described reinforced transportation section is 2: 1～4: 1.Compression ratio refers to the ratio of first segment screw thread volume and final section screw thread volume, through the pitch and the depth controlled system screw thread volume of control screw thread.Rubber powder particle diameter difference hour is selected small reduction ratio, when the particle diameter difference is big, selects bigger compression ratio.Through the volume of control feeding section into and out of waste rubber grain, make and dwindle the distance between the waste rubber grain by the enough pressure of waste rubber generation that gets into the extrusion shearing zone from feeding section, further improve and shear and desulfuration efficiency.Because the tap density of rubber powder is little more a lot of than rubber density, tap density is relevant with the granularity of rubber powder, and compression ratio is too small, and then the extrusion shearing function is poor, and excessive then extrusion shearing power consumption is excessive, causes the equipment sh to damage screw rod.
The length-to-diameter ratio L/D of described twin screw is 50: 1～65: 1.The big more material of length-to-diameter ratio residence time in equipment is long more, helps rubber more and shears desulfurization.The too small devulcanization of rubber weak effect that causes, excessive energy consumption and the cost then equipped increases.
The material of cylindrical shell and twin screw is highly wear-resisting alloy steel.Highly wear-resisting alloy steel can prevent component abrasion in continuous shear extrusion process and influence the shearing sweetening effectiveness.
Vulcanized rubber powder raw material that the utility model is suitable for can be the desulfurization of vulcanized rubbers such as scrap tire rubber, butyl rubber, styrene-butadiene rubber(SBR), terpolymer EP rubber, ethylene-propylene rubber(EPR).The beneficial effect of the utility model is: technological process is continuous, airtight when using the utility model twin screw devulcanization of rubber device, thus can not cause secondary pollution to environment, and equipment is simple, shears, desulfuration efficiency is high, and energy consumption is little.
Description of drawings
The twin screw devulcanization of rubber device synoptic diagram of first embodiment of Fig. 1 the utility model
The twin screw devulcanization of rubber device synoptic diagram of second embodiment of Fig. 2 the utility model
The reinforced transportation section of among Fig. 1, Fig. 21 expression, 2 expression extrusion shearing sections, 3 expression transition sections, 4 expression mixing sections
The devulcanization of rubber process synoptic diagram of first embodiment of the twin screw devulcanization of rubber device of Fig. 3 the utility model
The devulcanization of rubber process synoptic diagram of second embodiment of the twin screw devulcanization of rubber device of Fig. 4 the utility model
The structural representation of the reinforced transportation section of the twin screw in Fig. 5 the utility model,
Wherein scheming A is the first segment screw thread that pitch is big, the degree of depth is dark, volume is bigger; Figure B is the final section screw thread that pitch is less, the degree of depth is more shallow, volume is less
Fig. 6 is that the adjacent cams angle that staggers is the structural representation of the combined shear piece formed of 90 °, 5 cams
Fig. 7 is that the adjacent cams angle that staggers is the structural representation of the combined shear piece formed of 45 °, 7 cams
Fig. 8 is that the adjacent cams angle that staggers is the structural representation of the combined shear piece formed of 30 °, 7 cams
Fig. 9 is a twin screw devulcanization of rubber schematic representation of apparatus, 5 expression cylindrical shells among the figure, 6 expression twin screws, 7 expression opening for feeds, 8 expression heating units.
Embodiment
Embodiment 1
First embodiment of the twin screw devulcanization of rubber device of the utility model as shown in Figure 1; Have cylindrical shell, be positioned at the tube intravital twin screw and the heating unit of engagement in the same way; Cylindrical shell has opening for feed; Described twin screw comprises reinforced transportation section with compression ratio, three mutual discontinuous extrusion shearing sections, lays respectively at intersegmental two stage screw transition section, the mixing section of adjacent two extrusion shearings; The extrusion shearing section is two combined shear pieces that are meshed; The combined shear piece is made up of two or more cams that are staggeredly located out, the angle difference that staggers of its adjacent cams of combined shear piece of different extrusion shearing sections, and the adjacent cams angle that staggers is 90 ° in the first combined shear piece wherein as shown in Figure 4; The adjacent cams angle that staggers is 45 ° in the second combined shear piece as shown in Figure 5, and the adjacent cams angle that staggers is 30 ° in the 3rd combined shear piece as shown in Figure 6; The screw rod transition section is 3 pitch for every section; The compression ratio of reinforced transportation section is 2: 1; The length-to-diameter ratio L/D of twin screw is 55: 1; Cylindrical shell that contacts with waste rubber grain and twin screw material are highly wear-resisting alloy steel.
As shown in Figure 3; Adopt this twin screw devulcanization of rubber device to carry out the method for devulcanization of rubber; Have following process step: with particle diameter is the opening for feed of the vulcanized rubber powder adding cylindrical shell of 0.2-1.0mm, carries out appropriate compacting through the reinforced transportation section with compression ratio, is delivered to the extrusion shearing section of twin screw; Pass through discontinuous three extrusion shearing sections successively; Under heating condition, under the extrusion shearing of dissimilar combined shear pieces, realize the desulfurization wholly or in part of rubber powder, generate the mixed type shoddy of complete desulfurization and partial desulfurization coexistence.
In the complete processing screw speed is controlled at 100rpm.Mixing and the specimen preparation of shoddy is pressed GB13460-2003, tensile property and elongation at break testing standard: GB/T 1040-92, the testing standard of mooney viscosity: GB/T 1232.1-2000.After shearing desulphurization reaction, shoddy has obtained splendid revulcanization effect, tensile strength 14.9MPa, elongation at break 478.5%, mooney viscosity 60.
Second embodiment of the twin screw devulcanization of rubber device of the utility model as shown in Figure 2; Have cylindrical shell, be positioned at the tube intravital twin screw and the heating unit of engagement in the same way; Cylindrical shell has opening for feed; Described twin screw comprises reinforced transportation section, five the mutual discontinuous extrusion shearing sections with compression ratio and lays respectively at intersegmental four zone screw transition section, the mixing section of adjacent two extrusion shearings; The extrusion shearing section is two combined shear pieces that are meshed; The combined shear piece is made up of two or more cams that are staggeredly located out, the angle difference that staggers of its adjacent cams of combined shear piece of different extrusion shearing sections, and wherein the adjacent cams angle that staggers is 90 ° in the first combined shear piece; The adjacent cams angle that staggers is 60 ° in the second combined shear piece, and the adjacent cams angle that staggers is that the adjacent cams angle that staggers is that the adjacent cams angle that staggers is 15 ° in 30 ° of the 5th combined shear piece in 45 ° of the 4th combined shear piece in the 3rd combined shear piece; The screw rod transition section is 3 pitch for every section; The compression ratio of reinforced transportation section is 4: 1; The length-to-diameter ratio L/D of twin screw is 65: 1; Cylindrical shell that contacts with waste rubber grain and twin screw material are highly wear-resisting alloy steel.
As shown in Figure 4; Adopt this twin screw devulcanization of rubber device to carry out the method for devulcanization of rubber; Have following process step: with particle diameter is the opening for feed of the vulcanized rubber powder adding cylindrical shell of 0.2-1.0mm, carries out appropriate compacting through the reinforced transportation section with compression ratio, is delivered to the extrusion shearing section of twin screw; Pass through discontinuous five extrusion shearing sections successively; Under heating condition, under the extrusion shearing of dissimilar combined shear pieces, realize the desulfurization wholly or in part of rubber powder, generate the mixed type shoddy of complete desulfurization and partial desulfurization coexistence.
In the complete processing screw speed is controlled at 120rpm.Mixing and the specimen preparation of shoddy is pressed GB13460-2003, tensile property and elongation at break testing standard: GB/T 1040-92, the testing standard of mooney viscosity: GB/T 1232.1-2000.After shearing desulphurization reaction, shoddy has obtained splendid revulcanization effect, tensile strength 15.1MPa, elongation at break 481.5%, mooney viscosity 62.
Claims (6)
1. twin screw devulcanization of rubber device; It is characterized in that: have cylindrical shell, be positioned at the tube intravital twin screw and the heating unit of engagement in the same way; Cylindrical shell has opening for feed, and described twin screw comprises reinforced transportation section, two or more the mutual discontinuous extrusion shearing sections with compression ratio and is positioned at intersegmental screw rod transition section, the mixing section of adjacent two extrusion shearings.
2. the described twin screw devulcanization of rubber of claim 1 device; It is characterized in that: described extrusion shearing section is two combined shear pieces that are meshed; The combined shear piece is made up of two or more cams that are staggeredly located out, the angle difference that staggers of its adjacent cams of combined shear piece of different extrusion shearing sections.
3. the described twin screw devulcanization of rubber of claim 1 device, it is characterized in that: described screw rod transition section is 2～4, every section is 3～5 pitch.
4. the described twin screw devulcanization of rubber of claim 1 device, it is characterized in that: the compression ratio of described reinforced transportation section is 2: 1～4: 1.
5. the described twin screw devulcanization of rubber of claim 1 device, it is characterized in that: the length-to-diameter ratio L/D of described twin screw is 55: 1～65: 1.
6. the described twin screw devulcanization of rubber of claim 1 device, it is characterized in that: the material of described cylindrical shell and twin screw is highly wear-resisting alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202611603U CN202157045U (en) | 2011-07-22 | 2011-07-22 | Double-screw rubber devulcanizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202611603U CN202157045U (en) | 2011-07-22 | 2011-07-22 | Double-screw rubber devulcanizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202157045U true CN202157045U (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202611603U Withdrawn - After Issue CN202157045U (en) | 2011-07-22 | 2011-07-22 | Double-screw rubber devulcanizing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250381A (en) * | 2011-07-22 | 2011-11-23 | 常州大学 | Twin-screw device and method for rubber desulfurization |
| CN104004222A (en) * | 2014-04-29 | 2014-08-27 | 青岛科技大学 | Waste rubber low-temperature continuous regeneration device and process method |
| CN108586798A (en) * | 2018-05-04 | 2018-09-28 | 江苏睿博环保设备有限公司 | A kind of preparation method of the waste and old car tire of high-quality, light truck tire reclaimed rubber |
-
2011
- 2011-07-22 CN CN2011202611603U patent/CN202157045U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102250381A (en) * | 2011-07-22 | 2011-11-23 | 常州大学 | Twin-screw device and method for rubber desulfurization |
| CN104004222A (en) * | 2014-04-29 | 2014-08-27 | 青岛科技大学 | Waste rubber low-temperature continuous regeneration device and process method |
| CN108586798A (en) * | 2018-05-04 | 2018-09-28 | 江苏睿博环保设备有限公司 | A kind of preparation method of the waste and old car tire of high-quality, light truck tire reclaimed rubber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120307 Effective date of abandoning: 20130918 |
|
| RGAV | Abandon patent right to avoid regrant |