CN112791816A - System and method for low-temperature crushing of rubber - Google Patents
System and method for low-temperature crushing of rubber Download PDFInfo
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- CN112791816A CN112791816A CN202011204650.XA CN202011204650A CN112791816A CN 112791816 A CN112791816 A CN 112791816A CN 202011204650 A CN202011204650 A CN 202011204650A CN 112791816 A CN112791816 A CN 112791816A
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- rubber
- chamber
- treatment chamber
- crushing
- refrigerant
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003507 refrigerant Substances 0.000 claims abstract description 82
- 238000011282 treatment Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000001172 regenerating effect Effects 0.000 claims abstract description 21
- 238000005057 refrigeration Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 20
- 239000000843 powder Substances 0.000 claims description 12
- 238000011221 initial treatment Methods 0.000 claims description 10
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000007788 liquid Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000007710 freezing Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 2
- 238000010057 rubber processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
- B02C19/186—Use of cold or heat for disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
Abstract
The invention relates to the field of low-temperature crushing equipment, in particular to a system and a method for crushing rubber at low temperature, which comprises a treatment component, a secondary refrigerant circulating pipeline and a refrigeration component, wherein the treatment component is arranged on the treatment component; the processing assembly comprises a primary processing chamber, a secondary processing chamber and a tertiary processing chamber; the refrigeration assembly comprises a circulating pipe, a regenerative heat exchanger, a refrigerant compressor, a cooler and a throttle valve; in the refrigeration assembly, a regenerative heat exchanger, a refrigerant compressor, a cooler and a throttle valve are connected in series through a circulating pipe, and a refrigerant is filled in the circulating pipe; by adopting the invention, the circulating pipe is matched with the heat exchange pipeline, so that a circulating heat exchange system is realized, the layout design of the treatment chamber is optimized, the cold energy performance is fully exerted, the treatment chamber is cooled in a grading way, the rubber treatment requirements of different stages are met, and the production efficiency of rubber treatment and crushing is improved; the refrigerant compressor and the throttle valve are utilized to circularly obtain cold energy, the system is ensured to continuously run for a long time, an external cold source is not needed, and the whole dual-circulation refrigeration runs efficiently.
Description
Technical Field
The invention relates to the field of low-temperature crushing equipment, in particular to a system and a method for crushing rubber at low temperature.
Background
The liquid nitrogen freezing and crushing method is the mature low-temperature crushing technology at present, and the basic method is to roughly crush rubber at normal temperature, then freeze the rubber after the rough crushing by liquid nitrogen to embrittle the rubber, and then crush the embrittled rubber. The method has high consumption of liquid nitrogen, so the cost of rubber pulverization is high. The liquid nitrogen temperature reaches-196 ℃, actually, the elasticity of the rubber is greatly reduced at 0 ℃, and the rubber is completely embrittled when reaching-70 ℃; however, the liquid nitrogen freezing and crushing method for freezing and crushing rubber cannot fully utilize cold energy, waste of the cold energy is serious, and manufacturing cost is high.
The researchers in China research the air expansion refrigeration crushing technology, and the technology also adopts a crushing method of using normal temperature and low temperature for crushing at normal temperature and crushing at low temperature, but the cold energy source of the technology is different from that of a liquid nitrogen freezing crushing method. The core of the technology is that air is compressed to a certain pressure and then vaporized and expanded by a turbine to produce low-temperature air at-120 ℃ to provide cold energy for rubber, and then the cold air is recycled to avoid waste of the cold energy.
But the technology has lower energy consumption and lower energy consumption compared with a liquid nitrogen freezing and crushing method, and can fully utilize cold energy. However, because the coarse crushing is performed at normal temperature, and because the toughness of the rubber at normal temperature is high, the energy consumption is relatively high at low temperature.
Disclosure of Invention
The invention aims to provide a system which makes full use of cold energy circulation, embrittles rubber at low temperature and has high heat exchange and refrigeration efficiency.
A system for low-temperature crushing of rubber comprises a processing assembly, a secondary refrigerant circulating pipeline and a refrigerating assembly;
the processing assembly comprises a primary processing chamber, a secondary processing chamber and a tertiary processing chamber; the refrigeration assembly comprises a circulating pipe, a regenerative heat exchanger, a refrigerant compressor, a cooler and a throttle valve;
a secondary refrigerant for cooling is arranged in the secondary refrigerant circulating pipeline, the secondary refrigerant circulating pipeline is communicated with and connected to the regenerative heat exchanger, and the secondary refrigerant circulating pipeline flows through the third treatment chamber, the second treatment chamber (2) and the first treatment chamber once;
in the refrigeration assembly, a regenerative heat exchanger, a refrigerant compressor, a cooler and a throttle valve are connected in series through a circulating pipe, and a refrigerant is filled in the circulating pipe.
Furthermore, the primary treatment chamber comprises a primary cooling chamber and a coarse crushing crusher, and the low-temperature environment of the primary cooling chamber is maintained at-5 ℃ to-15 ℃.
Further, the secondary treatment chamber comprises a secondary cooling chamber and a particle crusher; the low-temperature environment of the secondary cooling chamber is maintained at-55 ℃ to-65 ℃.
Further, the three-stage treatment chamber comprises a three-stage cooling chamber and a powder pulverizer; the low-temperature environment of the three-stage cooling chamber is maintained at-95-105 ℃.
A method for low-temperature crushing of rubber comprises the following steps:
s1, starting the refrigeration assembly, starting the secondary refrigerant circulating pipeline and the circulating pipe, and normally operating;
s2, the secondary refrigerant circulating pipeline in the S1 carries the secondary refrigerant and sequentially passes through the third-stage treatment chamber, the second-stage treatment chamber and the first-stage treatment chamber; preparing the processing assembly in a low-temperature environment;
s3, feeding the rubber to be crushed into a primary treatment chamber, and performing primary coarse crushing;
s4, transferring the material in the S3 to a secondary treatment chamber, and further cooling and finely crushing to obtain rubber particles;
and S5, transferring the rubber particles in the S4 to a three-stage treatment chamber, cooling at ultralow temperature until the rubber particles are completely crisp, and crushing and grinding to obtain rubber powder.
The invention has the beneficial effects that:
in the rubber processing system, rubber enters a primary processing chamber, is primarily cooled to-10 ℃ through a primary cooling chamber to be primarily embrittled, and is transmitted to a coarse crushing crusher to start primary coarse crushing and produce fragments; then the rubber particles are conveyed to a secondary treatment chamber, enter a secondary cooling chamber for secondary cooling to-60 ℃, and then are conveyed to a particle crusher to produce crushed rubber particles; finally, the mixture enters a third-stage treatment chamber, is subjected to thorough embrittlement through a third-stage cooling chamber, is cooled to-100 ℃, and then enters a third-stage crusher for crushing to produce powder, and finally finished powder is obtained;
in the treatment process, in a heat exchange system, refrigerating capacity is obtained by secondary refrigerant in a heat exchange pipeline through a regenerative heat exchanger, so that the temperature of the secondary refrigerant reaches-110 ℃, and the secondary refrigerant is cooled by a three-stage treatment chamber to reach-100 ℃ so that rubber is completely embrittled; cooling the rubber in a secondary treatment chamber to reduce the temperature to-60 ℃ so as to embrittle the rubber; finally, the rubber is subjected to primary treatment in a first-stage treatment chamber 1, and the temperature of the rubber is reduced to-10 ℃ so that the rubber is subjected to primary embrittlement; finally, the secondary refrigerant enters the regenerative heat exchanger again to exchange heat with the mixed refrigerant, so that the secondary refrigerant obtains cold energy and is circulated again; the secondary refrigerant is preferentially led to flow through the three-stage treatment chamber, so that the cold energy can be better utilized;
in the refrigeration system, the mixed refrigerant in the circulating pipe is compressed by a refrigerant compressor, so that the volume is reduced and the temperature is increased; cooling the mixed refrigerant by a cooler; then the mixed refrigerant is further cooled by a regenerative heat exchanger; the temperature of the mixed refrigerant passing through the regenerative heat exchanger is further reduced, the volume of the mixed refrigerant is increased through a throttle valve after the temperature is reduced, the temperature is reduced to about minus 160 ℃, and the mixed refrigerant passes through the regenerative heat exchanger to cool the secondary refrigerant in the secondary refrigerant circulating pipeline;
by adopting the invention, the circulating pipe is matched with the heat exchange pipeline, so that a double-refrigerant circulating heat exchange system of mixed refrigerant and secondary refrigerant is realized, the layout design of the treatment chamber is optimized, the reasonable utilization of heat exchange efficiency is ensured, the cold energy performance is fully exerted, the treatment chamber is cooled in stages, the rubber treatment requirements of different stages are met, and the production efficiency of rubber treatment and crushing is improved; the refrigerant compressor and the throttle valve are utilized to circularly obtain cold energy, the system is ensured to continuously run for a long time, an external cold source is not needed, and the whole system ensures the efficient running of double-circulation refrigeration.
Drawings
FIG. 1 is a schematic view of the flow structure of the present invention;
reference numerals: 1-a first-stage treatment chamber, 11-a first-stage cooling chamber, 12-a coarse crushing crusher, 2-a second-stage treatment chamber, 21-a second-stage cooling chamber, 22-a particle crusher, 3-a third-stage treatment chamber, 31-a third-stage cooling chamber, 32-a powder crusher, a 4-refrigerant compressor, a 5-cooler, a 6-regenerative heat exchanger, a 7-throttling valve, an 8-secondary refrigerant circulating pipeline and a 9-circulating pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a system for low-temperature rubber pulverization comprises a processing assembly, a secondary refrigerant circulating pipeline 8 and a refrigerating assembly;
the processing assembly comprises a primary processing chamber 1, a secondary processing chamber 2 and a tertiary processing chamber 3; the refrigeration assembly comprises a circulating pipe 9, a regenerative heat exchanger 6, a refrigerant compressor 4, a cooler 5 and a throttle valve 7;
a secondary refrigerant for cooling is arranged in the secondary refrigerant circulating pipeline 8, the secondary refrigerant circulating pipeline 8 is communicated with the regenerative heat exchanger 6, and the secondary refrigerant circulating pipeline 8 flows through the third treatment chamber 3, the second treatment chamber 2 and the first treatment chamber once;
in the refrigeration assembly, a regenerative heat exchanger 6, a refrigerant compressor 4, a cooler 5 and a throttle valve 7 are connected in series through a circulating pipe 9, and a refrigerant is filled in the circulating pipe 9;
further, the primary treatment chamber 1 comprises a primary cooling chamber 11 and a coarse crushing crusher 12, and the low-temperature environment of the primary cooling chamber 11 is maintained at-10 ℃;
further, the secondary treatment chamber 2 comprises a secondary cooling chamber 21 and a particle crusher 22; the low-temperature environment of the secondary cooling chamber 21 is maintained at-60 ℃;
further, the third-stage treatment chamber 3 comprises a third-stage cooling chamber 31 and a powder pulverizer 32; the low-temperature environment of the tertiary cooling chamber 31 is maintained at-100 ℃;
in the rubber processing system, rubber enters a primary processing chamber 1, is primarily cooled to-10 ℃ through a primary cooling chamber 11 to be subjected to primary embrittlement, and is transmitted to a coarse crushing crusher 12 to start primary coarse crushing and produce fragments; then the rubber particles are conveyed to a secondary treatment chamber 2, enter a secondary cooling chamber 21 to be secondarily cooled to-60 ℃, and then are conveyed to a particle crusher 22 to produce rubber particles; finally, the powder enters a third-stage treatment chamber 3, is subjected to thorough embrittlement through a third-stage cooling chamber 31, is cooled to-100 ℃, and then enters a third-stage crusher for crushing to produce powder, and finally finished powder is obtained;
in the treatment process, in the heat exchange system, the secondary refrigerant in the heat exchange pipeline 8 obtains cold energy through the regenerative heat exchanger 6, so that the temperature of the secondary refrigerant reaches-110 ℃, and the secondary refrigerant is cooled through the three-stage treatment chamber 3, so that the temperature of the secondary refrigerant reaches-100 ℃, and the rubber is thoroughly embrittled; cooling the rubber in a secondary treatment chamber 2 to reduce the temperature to-60 ℃ so as to embrittle the rubber; finally, the rubber is subjected to primary treatment in a first-stage treatment chamber 1, and the temperature of the rubber is reduced to-10 ℃ so that the rubber is subjected to primary embrittlement; finally, the secondary refrigerant enters the regenerative heat exchanger again to exchange heat with the mixed refrigerant, so that the secondary refrigerant obtains cold energy and is circulated again; the secondary refrigerant is preferentially led to flow through the three-stage treatment chamber 3, so that the cold energy can be better utilized;
in the refrigeration system, the mixed refrigerant in the circulating pipe 9 is compressed by the refrigerant compressor 4, the volume is reduced, and the temperature is increased; cooling the mixed refrigerant by a cooler 5; then the mixed refrigerant is further cooled by a regenerative heat exchanger 6; the temperature of the mixed refrigerant passing through the regenerative heat exchanger 6 is further reduced, the volume of the mixed refrigerant is increased and the temperature is reduced to about minus 160 ℃ after the temperature of the mixed refrigerant is reduced through the throttle valve 7, and the mixed refrigerant passes through the regenerative heat exchanger 6 to cool the secondary refrigerant in the secondary refrigerant circulating pipeline 8;
by adopting the invention, the circulating pipe 9 is matched with the heat exchange pipeline 8, so that a double-refrigerant circulating heat exchange system of mixed refrigerant and secondary refrigerant is realized, the layout design of the treatment chamber is optimized, the reasonable utilization of heat exchange efficiency is ensured, the cold energy performance is fully exerted, the treatment chamber is cooled in a grading way, the rubber treatment requirements of different stages are met, and the production efficiency of rubber treatment crushing is improved; the refrigerant compressor 4 and the throttle valve 7 are utilized to circularly obtain cold energy, the system is ensured to continuously run for a long time, an external cold source is not needed, and the whole system ensures the efficient running of double-circulation refrigeration.
A method for crushing rubber at low temperature is characterized by comprising the following steps:
s1, starting the refrigeration assembly, starting the secondary refrigerant circulating pipeline 8 and the circulating pipeline 9, and normally operating;
s2, the secondary refrigerant circulating pipeline 8 in the S1 carries the secondary refrigerant and sequentially passes through the tertiary treatment chamber 3, the secondary treatment chamber 2 and the primary treatment chamber 1; preparing the processing assembly in a low-temperature environment;
s3, feeding the rubber to be crushed into a primary treatment chamber 1, and performing primary coarse crushing;
s4, transferring the material in the S3 to a secondary treatment chamber 2, and further cooling and finely crushing to obtain rubber particles;
and S5, transferring the rubber particles in the S4 to a third-stage treatment chamber 3, cooling at ultralow temperature until the rubber particles are completely crisp, and crushing and grinding to obtain rubber powder.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the described embodiments may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.
Claims (5)
1. The system for crushing rubber at low temperature is characterized by comprising a treatment component, a secondary refrigerant circulating pipeline (8) and a refrigeration component;
the processing assembly comprises a primary processing chamber (1), a secondary processing chamber (2) and a tertiary processing chamber (3); the refrigeration assembly comprises a circulating pipe (9), a regenerative heat exchanger (6), a refrigerant compressor (4), a cooler (5) and a throttle valve (7);
a secondary refrigerant for cooling is arranged in the secondary refrigerant circulating pipeline (8), the secondary refrigerant circulating pipeline (8) is communicated with and connected to the regenerative heat exchanger (6), and the secondary refrigerant circulating pipeline (8) flows through the third treatment chamber (3), the second treatment chamber (2) and the first treatment chamber for one time;
in the refrigeration assembly, a regenerative heat exchanger (6), a refrigerant compressor (4), a cooler (5) and a throttle valve (7) are connected in series through a circulating pipe (9), and a refrigerant is filled in the circulating pipe (9).
2. A system for low-temperature rubber pulverization as claimed in claim 1, characterized in that the low-temperature environment of said primary treatment chamber (1) including the primary cooling chamber (11) and the coarse pulverizer (12) in said primary cooling chamber (11) is maintained at-5 ℃ to-15 ℃.
3. A system for the cryogenic comminution of rubber according to claim 1, characterized in that the secondary treatment chamber (2) comprises a secondary cooling chamber (21) and a particle crusher (22); the low-temperature environment of the secondary cooling chamber (21) is maintained at-55 ℃ to-65 ℃.
4. A system for rubber cryogenic pulverization as claimed in claim 1, characterized in that said tertiary treatment chamber (3) comprises a tertiary cooling chamber (31) and a powder pulverizer (32); the low-temperature environment of the three-stage cooling chamber (31) is maintained at-95-105 ℃.
5. A method for crushing rubber at low temperature is characterized by comprising the following steps:
s1, starting the refrigeration assembly, starting the secondary refrigerant circulating pipeline (8) and the circulating pipe (9), and normally operating;
s2, the secondary refrigerant circulating pipeline (8) in the S1 carries the secondary refrigerant and sequentially passes through the tertiary treatment chamber (3), the secondary treatment chamber (2) and the primary treatment chamber (1); preparing the processing assembly in a low-temperature environment;
s3, feeding the rubber to be crushed into a primary treatment chamber (1), and performing primary coarse crushing;
s4, transferring the material in the S3 to a secondary treatment chamber (2), and further cooling and finely crushing to obtain rubber particles;
and S5, transferring the rubber particles in the S4 to a three-stage treatment chamber (3), cooling at ultralow temperature until the rubber particles are completely crisp, and crushing and grinding the rubber particles to obtain rubber powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204650.XA CN112791816A (en) | 2020-11-02 | 2020-11-02 | System and method for low-temperature crushing of rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204650.XA CN112791816A (en) | 2020-11-02 | 2020-11-02 | System and method for low-temperature crushing of rubber |
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| CN112791816A true CN112791816A (en) | 2021-05-14 |
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| CN202011204650.XA Pending CN112791816A (en) | 2020-11-02 | 2020-11-02 | System and method for low-temperature crushing of rubber |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356174A (en) * | 2000-10-17 | 2002-07-03 | 雷科姆专利许可有限公司 | Apparatus for treating used tyre |
| US20020189264A1 (en) * | 2001-04-23 | 2002-12-19 | Kantonen Calvin L. | Cryogenic comminution of rubber |
| CN101818979A (en) * | 2010-05-17 | 2010-09-01 | 沈军 | Low-temperature tunnel and low-temperature material processing plant formed by tunnel |
| CN102940974A (en) * | 2012-11-07 | 2013-02-27 | 江苏大学 | Oil gas condensation and recovery method by using mixed refrigerant cycle |
| CN104589543A (en) * | 2015-01-09 | 2015-05-06 | 何志斌 | Waste tire cooling deep processing treatment method |
| CN108393169A (en) * | 2018-05-16 | 2018-08-14 | 国家煤化工产品质量监督检验中心（安徽）（淮南市产品质量监督检验所） | A kind of rubbish Freezing smashing device |
| CN110355907A (en) * | 2019-08-19 | 2019-10-22 | 徐州托普新材料有限公司 | A kind of reclaimed rubber production process equipment |
-
2020
- 2020-11-02 CN CN202011204650.XA patent/CN112791816A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356174A (en) * | 2000-10-17 | 2002-07-03 | 雷科姆专利许可有限公司 | Apparatus for treating used tyre |
| US20020189264A1 (en) * | 2001-04-23 | 2002-12-19 | Kantonen Calvin L. | Cryogenic comminution of rubber |
| CN101818979A (en) * | 2010-05-17 | 2010-09-01 | 沈军 | Low-temperature tunnel and low-temperature material processing plant formed by tunnel |
| CN102940974A (en) * | 2012-11-07 | 2013-02-27 | 江苏大学 | Oil gas condensation and recovery method by using mixed refrigerant cycle |
| CN104589543A (en) * | 2015-01-09 | 2015-05-06 | 何志斌 | Waste tire cooling deep processing treatment method |
| CN108393169A (en) * | 2018-05-16 | 2018-08-14 | 国家煤化工产品质量监督检验中心（安徽）（淮南市产品质量监督检验所） | A kind of rubbish Freezing smashing device |
| CN110355907A (en) * | 2019-08-19 | 2019-10-22 | 徐州托普新材料有限公司 | A kind of reclaimed rubber production process equipment |
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