CN105479613A - Supercritical assisted green regeneration process combining double-rotator continuous mixer with screw extruder - Google Patents
Supercritical assisted green regeneration process combining double-rotator continuous mixer with screw extruder Download PDFInfo
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- CN105479613A CN105479613A CN201510860216.XA CN201510860216A CN105479613A CN 105479613 A CN105479613 A CN 105479613A CN 201510860216 A CN201510860216 A CN 201510860216A CN 105479613 A CN105479613 A CN 105479613A
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- Prior art keywords
- rubber
- screw extruder
- continuous mixer
- green
- regeneration
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/10—Extrusion moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a supercritical assisted green regeneration process combining a double-rotator continuous mixer with a screw extruder. The supercritical assisted green regeneration process comprises the following steps: feeding rubber particles obtained by crushing and separating a waste tire into the double-rotator continuous mixer, wherein in a supercritical fluid environment, rubber particles are subjected to high-shearing and strong stretching effects of a double-rotator mixing flow field, so that the rubber particles are promoted to carry out low-temperature green devulcanizing regeneration; then, performing extruding forming on the rubber particles by the screw extruder, and finally, sealing, cooling and drying the rubber particles to obtain granular regenerated rubber, and packaging and warehousing the granular regenerated rubber. According to the process, a granular restored regenerated rubber product is prepared by virtue of directed selective green devulcanizing regeneration through low-temperature/high-shearing/strong stretching of the supercritical fluid assisted waste rubber particle mixing flow field of the double-rotator mixer; and by not requiring to add any chemical auxiliaries and only depending on the mechanical force chemical reaction principle in the production process, continuous, green and safe production of the granular regenerated rubber product is realized from waste rubber particles by utilizing stress inducing to break a three-dimensional grid structure in the product.
Description
Technical field
The present invention relates to regeneration process of waste rubber field, specifically a kind of overcritical auxiliary two-rotor continuous mixer and screw extruder green regeneration technology for ion.
Background technology
The generation of domestic a large amount of junked tire damages environment for human survival, how to be turned waste into wealth, resource recycling utilize be subject to extensive concern, China is to produce reclaimed rubber, through research and practice experience for many years, domestic reclaimed rubber produces the initial oil process of experience, water/oil method to conventional high-temperature high pressure dynamic desulfurization, again to present stage carry out with the normal pressure continuous plastication method in " machine " generation " tank ", their always exist and easily produce secondary pollution or obtain the shortcomings such as properties of product are undesirable, are difficult to further genralrlization application.
The continuous mixing equipment that two-rotor continuous mixer is developed in middle 1960s by Farrel company of the U.S., wherein material is subject to the high shear in the mixing flow field of rotor, strong stretching action.In view of it had both retained the mixing Characteristics of banbury excellence, again can continuous operation, and it is large to have production capacity, operation, feature easy to maintenance, therefore the various macromolecular material mixing that is widely used.As shown in Figure 1, C-C, C-S, S-S key bond energy in vulcanized rubber cross-linked network structure reduces successively, and when by shearing force effect, three kinds of bond energys all likely rupture, and M8003 line is more difficult; When the Tensile masterpiece used time, can reach and effectively control to make its linkage containing sulfur that only ruptures, and the object that main chain is not destroyed, show that it is more applicable to vulcanized rubber and breaks sulfur regeneration.
In order to high performance recovery reclaimed rubber product can be obtained in free of contamination situation, combine with two-rotor continuous mixer and screw extruder, relend and help superpower swelling, the penetrating power of supercritical fluid and provide inert environments for it, form a kind of novel green, continuously disconnected sulfur regeneration technology.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art; in conjunction with supercritical fluid infiltration, swelling and protection rubber molecule structure and the mixing flow field of birotor high shear, hale and stretch acting in conjunction, a kind of overcritical auxiliary two-rotor continuous mixer and screw extruder green regeneration technology for ion are provided.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of overcritical auxiliary two-rotor continuous mixer and screw extruder green regeneration technology for ion, is characterized in that: comprise the following steps:
(1) rubber grain of the 1-10mm, by waste old obtained after broken apart, rubber grain is sent in two-rotor continuous mixer by charging gear spiral transferring; In two-rotor continuous mixer, rubber grain is in supercritical fluid environment, the rubber molecule structure of rubber grain is subject to supercritical fluid infiltration, swelling and protection, and the high shear in the mixing flow field of birotor, by force stretching action, only impel C-S key and the fracture of S-S key directional selectivity in the rubber molecule of rubber grain, and main chain C-C key is not destroyed, only destroy the three dimensional network structure of rubber molecule, realize the disconnected sulfur regeneration of rubber grain;
(2) step (1) being interrupted sulfur regeneration rubber sends in screw extruder through blow-off valve; carrying out granulation or shaping through screw rod transmission to screw extruder head, finally restoring reclaimed rubber packing of product warehouse-in by obtaining graininess after sealing, cooling, dry process successively.
The overcritical auxiliary two-rotor continuous mixer of described one and screw extruder green regeneration technology for ion, it is characterized in that: in step (1), the rotor speed of two-rotor continuous mixer is between 500-800r/min, disconnected sulfur regeneration temperature controls at about 100 DEG C, the disconnected sulfur regeneration time, supercritical fluid was supercritical CO 2 between 5-15min.
The overcritical auxiliary two-rotor continuous mixer of described one and screw extruder green regeneration technology for ion, it is characterized in that: in step (2), in screw extruder, screw speed is at about 55r/min, extrusion pressure is between 3-6MPa, adopt waxing sealing, it is 10-20g/ that the graininess prepared restores reclaimed rubber product quality, density 1-1.18g/cm
3.
Advantage of the present invention is:
1, supercritical fluid is superpower infiltration, swelling action and inert environments is provided; promote that rubber grain thermally equivalent breaks sulfur regeneration; in case particle surface local energy too high cause a large amount of backbone breaking to affect gained reclaimed rubber product quality and shorten the recovery time, avoid in conventional method and use antioxidant to stop heat to damage rubber molecule structure to protect C-C main chain.
2, in two-rotor continuous mixer, birotor flow field is different from classic screw extrusion molding and is that it not only has high shear forces and also has strong stretching action, in the netted chain of vulcanized rubber, the combination of C-C key, C-S key, S-S key can be respectively 346kJ/mol, 272kJ/mol, 270kJ/mol, high shear forces direct effect molecular link, three kinds of keys all likely rupture, and strong stretching action acts on strand two ends, can by effectively controlling to make it only make sulfur bonds, and main chain is not destroyed, is more applicable to vulcanized rubber and breaks sulfur regeneration.
3, adopt screw extruder extruding pelletization or shaping mill or the banbury refining glue substituting traditional high pollution, avoid the unmanageable defect of inorganization pollutant, whole process energy conservation, environmental protection and convenient and swift.
4, the graininess reclaimed rubber product obtained solves Traditional bulk reclaimed rubber and stacks not easy heat radiation and cause the shortcomings such as spontaneous combustion, the easy resilience of Mooney viscosity, product mechanical properties decrease.
Accompanying drawing explanation
Fig. 1 is rubber molecular chain force analysis schematic diagram.
Detailed description of the invention
A kind of overcritical auxiliary two-rotor continuous mixer and screw extruder green regeneration technology for ion, comprise following processing step:
The rubber grain of the 1-10mm obtained after broken apart by waste old adds in charging gear to be sent in two-rotor continuous mixer through spiral transferring; In two-rotor continuous mixer, at supercritical fluid CO
2in environment, rubber grain is subject to supercritical fluid infiltration, swelling and the high shear in protection rubber molecule structure and the mixing flow field of birotor, by force stretching action, only impel wherein C-S key and the fracture of S-S key directional selectivity, and main chain C-C key is not destroyed, only destroy its three dimensional network structure, realize the disconnected sulfur regeneration of rubber grain, wherein the rotor speed of two-rotor continuous mixer is between 500-800r/min, disconnected sulfur regeneration temperature controls at about 100 DEG C, and the disconnected sulfur regeneration time is between 5-15min; Then above-mentioned disconnected sulfur regeneration rubber is sent in screw extruder through blow-off valve; granulation or shaping is carried out to extruder head through screw rod transmission; wherein in screw extruder screw speed at about 55r/min; extrusion pressure is between 3-6MPa; be finally 10-20g/ by obtaining quality after waxing sealing, cooling, dry process successively respectively, density 1-1.18g/cm
3graininess restore reclaimed rubber packing of product warehouse-in.
Graininess reclaimed rubber prepared by the present invention and conventional regeneration rubber performance contrast and are shown in Table 1.
Graininess reclaimed rubber prepared by table 1 the present invention and conventional regeneration rubber performance contrast
Claims (3)
1. overcritical auxiliary two-rotor continuous mixer and a screw extruder green regeneration technology for ion, is characterized in that: comprise the following steps:
(1) rubber grain of the 1-10mm, by waste old obtained after broken apart, rubber grain is sent in two-rotor continuous mixer by charging gear spiral transferring; In two-rotor continuous mixer, rubber grain is in supercritical fluid environment, the rubber molecule structure of rubber grain is subject to supercritical fluid infiltration, swelling and protection, and the high shear in the mixing flow field of birotor, by force stretching action, only impel C-S key and the fracture of S-S key directional selectivity in the rubber molecule of rubber grain, and main chain C-C key is not destroyed, only destroy the three dimensional network structure of rubber molecule, realize the disconnected sulfur regeneration of rubber grain;
(2) step (1) being interrupted sulfur regeneration rubber sends in screw extruder through blow-off valve; carrying out granulation or shaping through screw rod transmission to screw extruder head, finally restoring reclaimed rubber packing of product warehouse-in by obtaining graininess after sealing, cooling, dry process successively.
2. the overcritical auxiliary two-rotor continuous mixer of one according to claim 1 and screw extruder green regeneration technology for ion, it is characterized in that: in step (1), the rotor speed of two-rotor continuous mixer is between 500-800r/min, disconnected sulfur regeneration temperature controls at about 100 DEG C, the disconnected sulfur regeneration time, supercritical fluid was supercritical CO 2 between 5-15min.
3. the overcritical auxiliary two-rotor continuous mixer of one according to claim 1 and screw extruder green regeneration technology for ion, it is characterized in that: in step (2), in screw extruder, screw speed is at about 55r/min, extrusion pressure is between 3-6MPa, adopt waxing sealing, it is 10-20g/ that the graininess prepared restores reclaimed rubber product quality, density 1-1.18g/cm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510860216.XA CN105479613A (en) | 2015-11-26 | 2015-11-26 | Supercritical assisted green regeneration process combining double-rotator continuous mixer with screw extruder |
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| CN201510860216.XA CN105479613A (en) | 2015-11-26 | 2015-11-26 | Supercritical assisted green regeneration process combining double-rotator continuous mixer with screw extruder |
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| CN105479613A true CN105479613A (en) | 2016-04-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778193A (en) * | 2016-05-09 | 2016-07-20 | 安徽世界村新材料有限公司 | Three-stage-cooperated environment-friendly devulcanizing regeneration technology for waste/used rubber |
| CN106380623A (en) * | 2016-09-13 | 2017-02-08 | 安徽世界村新材料有限公司 | Supercritical-CO2-assisted ozone desulfurization regeneration technique of waste rubber |
| CN107177208A (en) * | 2017-05-05 | 2017-09-19 | 安徽世界村新材料有限公司 | A kind of special scrap rubber composite modifier of waterproof roll and preparation method thereof |
| CN107353461A (en) * | 2017-05-26 | 2017-11-17 | 安徽世界村新材料有限公司 | A kind of preparation method of regenerating waste or used rubber elastomeric compound |
| CN107915863A (en) * | 2017-11-30 | 2018-04-17 | 马鞍山中创环保科技有限公司 | A kind of technique of energy-saving and environment-friendly twin-screw extrusion method production reclaimed rubber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604153A (en) * | 2012-02-28 | 2012-07-25 | 青岛科技大学 | Method and device for supercritical CO2 assisted preparation of regenerated rubber |
| CN204222013U (en) * | 2014-10-27 | 2015-03-25 | 河北永昌车辆部件科技有限公司 | A kind of scrap rubber low temperature continuous regeneration set |
| CN105085977A (en) * | 2015-07-24 | 2015-11-25 | 安徽红太阳新材料有限公司 | Devulcanization regeneration method by employing supercritical-fluid-assisted single-screw rubber regenerating machine |
-
2015
- 2015-11-26 CN CN201510860216.XA patent/CN105479613A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604153A (en) * | 2012-02-28 | 2012-07-25 | 青岛科技大学 | Method and device for supercritical CO2 assisted preparation of regenerated rubber |
| CN204222013U (en) * | 2014-10-27 | 2015-03-25 | 河北永昌车辆部件科技有限公司 | A kind of scrap rubber low temperature continuous regeneration set |
| CN105085977A (en) * | 2015-07-24 | 2015-11-25 | 安徽红太阳新材料有限公司 | Devulcanization regeneration method by employing supercritical-fluid-assisted single-screw rubber regenerating machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778193A (en) * | 2016-05-09 | 2016-07-20 | 安徽世界村新材料有限公司 | Three-stage-cooperated environment-friendly devulcanizing regeneration technology for waste/used rubber |
| CN106380623A (en) * | 2016-09-13 | 2017-02-08 | 安徽世界村新材料有限公司 | Supercritical-CO2-assisted ozone desulfurization regeneration technique of waste rubber |
| CN107177208A (en) * | 2017-05-05 | 2017-09-19 | 安徽世界村新材料有限公司 | A kind of special scrap rubber composite modifier of waterproof roll and preparation method thereof |
| CN107353461A (en) * | 2017-05-26 | 2017-11-17 | 安徽世界村新材料有限公司 | A kind of preparation method of regenerating waste or used rubber elastomeric compound |
| CN107915863A (en) * | 2017-11-30 | 2018-04-17 | 马鞍山中创环保科技有限公司 | A kind of technique of energy-saving and environment-friendly twin-screw extrusion method production reclaimed rubber |
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Application publication date: 20160413 |