CN1063546A - The method and apparatus of air cooling freeze production of glue powder - Google Patents
The method and apparatus of air cooling freeze production of glue powder Download PDFInfo
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- CN1063546A CN1063546A CN91109325A CN91109325A CN1063546A CN 1063546 A CN1063546 A CN 1063546A CN 91109325 A CN91109325 A CN 91109325A CN 91109325 A CN91109325 A CN 91109325A CN 1063546 A CN1063546 A CN 1063546A
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
A kind of method and apparatus of air cooling freeze production of glue powder, be the mode regularly switched successively by three refrigerating chambers with the Cryogenic air that obtains in the single air refrigeration cycle, be directly used in the freezing of rubber size, and carry out low-temperature grinding and produce rubber powder.In its refrigerating chamber screen pack is arranged, truncated cone-shaped slide plate and docking cone, or in refrigerating chamber, establish nozzle ring, rolling disc, discharge with endless screw device, the present invention combines common refrigeration and deep refrigerating, and the Cryogenic air drawing-in system after freezing reasonably recycled, it is good to have a refrigerating effect, the capacity usage ratio height, good economy performance needs with advantages such as equipment are few.
Description
The present invention relates to a kind of freezing pulverizing waste rubber to produce the method and apparatus of rubber powder.
In the freezing breaking method of waste old, adopt liquid nitrogen or dry ice to make cryogen usually, still, the production cost of this cold-producing medium is very high, and needs remote transportation, has therefore limited it in industrial application.The cryogenic gas that U.S. Pat 3818976 proposes to be obtained with the gas refrigeration circulation is a cold-producing medium, granular material is carried out the process and the device of freezing pulverizing.This process and device can be used for freezing pulverizing waste rubber and produce the rubber rubber powder.What its shortcoming was to adopt is the technological process of two gas circulation: the purpose of first gas circulation is to produce cold, and the purpose of second gas circulation is the cold that utilizes first gas circulation to produce.Make the freezing and pulverizing of granular material.Because the cryogenic gas that is obtained in first gas circulation is not to be directly used in the freezing material that is frozen, but through an intermediate heat exchanger, the cold that first gas circulation is produced passes to second gas circulation, simultaneously, also owing to adopted second additional full refrigerating loss that gas circulation is brought, and the gas temperature rise that the blower fan power consumption causes in this gas circulation, the result causes that cryogenic gas raises to the actual cryogenic temperature of material.This has not only lowered the refrigerating effect to material, has also reduced energy utilization ratio, and the product integrated cost is risen.For example: among the embodiment of this patent, in first gas circulation, the minimum temperature of gas is-130 ℃, is used to make the freezing gas temperature of material then to be-100 ℃ in its pairing second gas circulation, exists 30 ℃ temperature difference loss.Capacity usage ratio is low.Cooling effect is poor.
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of usefulness an air refrigeration cycle, refrigerating effect is good, need freezing process and the device of producing the rubber rubber powder of air cooling few with equipment, that capacity usage ratio is high, good economy performance.
Implementer's case of the present invention is: the method for regularly switching successively by three refrigerating chambers is with the direct freezing and low-temperature grinding rubber size of a single Cryogenic air that air refrigeration cycle obtained, promptly three refrigerating chambers carry out freezing, precooling respectively, the method that is used alternatingly that discharge is pulverized.Specific practice is: the Cryogenic air in the air circulation (in the turbine outlet) is introduced first refrigerating chamber, the temperature that makes the sizing material of wherein precooling be cooled to stipulate, go back to the cold limit of cold heat exchanger by a master from the Cryogenic air that this refrigerating chamber is discharged, entering second refrigerating chamber makes sizing material wherein obtain precooling, at this moment, freezing sizing material to set point of temperature is just entering pulverizer and is carrying out low-temperature grinding in the 3rd refrigerating chamber, in the low-temperature grinding process, there is the Cryogenic air of drawing from turbine outlet to enter this refrigerating chamber all the time and enters pulverizer together with pulverizing heat to be produced the compensation sizing material crushing process with frozen materials.After the pulverizing of the sizing material in the 3rd refrigerating chamber finishes, stop to wherein introducing the Cryogenic air that heat is pulverized in compensation, and quick feeding immediately, by the time the sizing material in first refrigerating chamber freezing to the regulation temperature the time, by corresponding valve in the Kai stopped pipe road, second above-mentioned refrigerating chamber gone in Cryogenic air in the above-mentioned pure gas circulation (in the turbine outlet) switching, make the sizing material of wherein precooling carry out freezing, and the cryogenic gas that this second refrigerating chamber is discharged enters said the 3rd refrigerating chamber in front by the cold limit of leading back cold heat exchanger, makes the sizing material that wherein originally enters fast carry out precooling; At this moment, the freezing sizing material to set point of temperature enters pulverizer together with the Cryogenic air in the inlet chamber and pulverizes in said first refrigerating chamber in front, three refrigerating chambers regularly switch again and again successively, finish the freezing of sizing material continuously, pre-cold-peace low-temperature grinding operation.
In single air refrigeration cycle, to the Cryogenic air after the precooling of normal temperature sizing material, enter the cold limit that prime is returned cold heat exchanger, Cryogenic air to pre-cold glue size after freezing, enter the cold limit of leading back cold heat exchanger, respectively prime is returned cold heat exchanger and carry out exchange heat, to reclaim and the reasonable use cold with the hot limit counter-flow air of leading back cold heat exchanger.Before leading back the hot limit air intlet of cold heat exchanger, by mending cooler this hot limit air is carried out common refrigeration, make hot limit air themperature reduce to-20～-30 ℃, common refrigeration and deep refrigerating are combined, this technology is worked under the best effort scope of common refrigeration and deep refrigerating, has further improved the economy of producing rubber powder, returns the cold limit air outlet slit of cold heat exchanger in prime, in refrigeration system, replenish dry air by drier, to keep normally carrying out of gas circulation.
For the smooth blowing that guarantees frozen materials in the refrigerating chamber and the safe operation of air circulation process, the structure of refrigerating chamber of the present invention is: between feed pipe in housing (discharge nozzle) and the blast pipe (air inlet pipe), screen pack is up and down arranged, the truncated cone-shaped slide plate is arranged in housing, and the slide plate bottom has the biconjugate that is bearing on the gusset to connect cone; The another kind of structure of refrigerating chamber of the present invention is: between feed pipe in housing (discharge nozzle) and the blast pipe (air inlet pipe), screen pack is up and down arranged, near on the lower end of screen pack have corresponding on the annular chamber of air inlet pipe, the annular chamber bottom is by the nozzle ring that blade is formed that leaves standstill that is uniformly distributed along the circumference, there is rolling disc the below of nozzle ring, the outer rim of rolling disc is fixed with moving vane, moving vane on the rolling disc is relative with stator blade on the nozzle ring, rolling disc is installed in the upper end of axle, and there is the discharge with endless screw device lower end of axle.
The present invention compared with prior art has following advantage: 1. the cryogenic gas that pure gas circulation is obtained is directly used in freezing sizing material, has reduced the loss of cold in transmittance process, has improved energy utilization ratio and to the refrigerating effect of sizing material; Saved and adopted necessary intermediate heat exchanger and circulating fan in two gas circulation flow processs, equipment is simpler.2. the modes regularly switched successively of three refrigerating chambers, are freezingly carried out simultaneously precooling, and the cold air of the uniform temp that obtains with kind of refrigeration cycle can make sizing material reach lower temperature.3. the sizing material of pulverizer is pulverized temperature, is regulated by the Cryogenic air amount of introducing, and is easy to operate.4. common refrigeration and deep refrigerating are combined, by twin-stage Hui Leng, the cold recovery utilization of the Cryogenic air after will be to the pre-cold-peace of sizing material freezing has further improved the economy of producing rubber powder.5. owing to replenish, guaranteed the long-term stability operation of system with dry air.
Fig. 1 is process of the present invention and schematic diagram of device;
Fig. 2 is an example structure figure of refrigerating chamber;
Fig. 3 is another example structure figure of refrigerating chamber;
Fig. 4 is the partial enlarged drawing of Fig. 3.
Among Fig. 1, the pressure that air compressor 1 provides is 0.65～0.8MPa(absolute pressure, air down together) enters aftercooler 2 through piping 101, in aftercooler 2, air themperature is cooled to 35～45 ℃ by cold water, then, enter the hot limit that prime is returned cold heat exchanger 3 through piping 102, return in the cold heat exchanger 3 in prime, hot limit air with carry out exchange heat from the cold limit adverse current Cryogenic air of pipeline 110, temperature is reduced to-3～-10 ℃, enter through piping 103 then and mend cooler 4, the outside cold of absorption of air in mending cooler 4, temperature is reduced to-20～-30 ℃, enters the hot limit of leading back cold heat exchanger 5 through piping 104 then.In leading back cold heat exchanger 5, above-mentioned hot limit air is with carrying out exchange heat once more from the cold limit adverse current Cryogenic air of pipeline 126, and temperature is reduced to-75～-85 ℃, enters turbine 6 through piping 105 then.In turbine 6, above-mentioned circulating air carries out adiabatic expansion, and pressure is reduced to 0.1～0.15MPa by 0.6～0.75MPa, and temperature is reduced to-120～-140 ℃, and then through piping 106,122a enters refrigerating chamber 7a.In refrigerating chamber 7a, directly the sizing material of precooling is freezing to the temperature of stipulating for Cryogenic air.Then, temperature is that-85～-95 ℃ Cryogenic air enters the cold limit of leading back cold heat exchanger 5 from refrigerating chamber 7a through pipeline 118a and 107,126, carry out exchange heat with hot limit counter-flow air from pipeline 104, temperature is elevated to-22～-35 ℃, through piping 108 and 124b, enter refrigerating chamber 7b then.In refrigerating chamber 7b, Cryogenic air makes the sizing material of normal temperature obtain precooling.Temperature is that-5～-15 ℃ air enters the hot limit that prime is returned cold heat exchanger 3 from refrigerating chamber 7b through piping 120b, 109, deduster 8 and pipeline 110, carry out exchange heat with hot limit circulated in countercurrent air from pipeline 102, temperature rises to 30～40 ℃, enters the coaxial eccentricity formula compressor 9 that turbine 6 is driven then.In centrifugal-flow compressor 9, air pressure is by 0.07～0.09MPa height to 0.1～0.15MPa, and simultaneously, the temperature of air also is elevated to 80～95 ℃.Then, air is cooler 10 before piping 112 enters, and behind water or chilled air cools to 30～40 ℃, enters air compressor 1 through piping 113, has finished an enclosed air refrigeration cycle.
Above-mentioned refrigerating chamber 7a and 7b carry out freezing and precooling respectively to sizing material when, freezing sizing material among the refrigerating chamber 7C to set point of temperature, decent piping 123C and 123 enters pulverizer and pulverizes.And, in the sizing material crushing process, have all the time from the outlet of turbine 6 draw, through piping 106,116,121C, refrigerating chamber 7C, pipeline 123C and 123 Cryogenic air of introducing the pulverizers, with the pulverizing heat of compensation sizing material in crushing process.Carrying the Cryogenic air of rubber powder, through piping 125, entering solid and gas separator 14 from the outlet of pulverizer 13.In solid and gas separator 14, rubber powder is discharged through valve 15; Cryogenic air is converged through piping 117 and the Cryogenic air the pipeline 107 from solid and gas separator 14, enters the cold limit import of leading back cooler 5 through pipeline 126, introduces the Cryogenic air amount in the pulverizer 13, regulates by corresponding valve.When the sizing material among the icy chamber 7C is pulverized when finishing, new normal temperature sizing material immediately from feed hopper 12 through piping 119C, this refrigerating chamber of packing into fast.
Sizing material in above-mentioned refrigerating chamber 7a and 7b is freezing respectively and be pre-chilled to the temperature of regulation, and after the sizing material among the refrigerating chamber 7C is pulverized and to be finished and feed, mode by the pipeline valve switching, sizing material to refrigerating chamber 7b carries out freezing, sizing material to refrigerating chamber 7C carries out precooling, and the sizing material among the refrigerating chamber 7a is carried out low-temperature grinding.Draw analogous conclusions, three refrigerating chambers regularly switch again and again, can realize that sizing material is freezing, the continued operation of precooling, low-temperature grinding and charging.
Air refrigeration cycle device some circulating air in practical operation can leak to the external world,, the air in the external world need be introduced in the pipeline 111 through piping 114, drier 11a or 11b and pipeline 115 for this reason.
Said turbine 6 is the turbo-expander of technical field extensive uses such as air separation in the foregoing description.It has a centrifugal-flow compressor 9, as brake, simultaneously, gives the supercharging air in the kind of refrigeration cycle.Said three refrigerating chambers are fixed bed or fluid unit identical on three structures among the embodiment.Said benefit cooler 4 is the high steam compression type refrigerating apparatus of economy in common refrigeration scope.Said prime is returned cold heat exchanger 3 and is led back the heat exchanger of cold heat exchanger 5 for technical field extensive uses such as air separation, and in addition, said all the other equipment all are industrial common equipments among the embodiment.
Among Fig. 2, feed pipe 15 is arranged at the top of housing 24, and discharge nozzle 22 is arranged at the bottom, and housing 24 bottom sides have Cryogenic air air inlet pipe 23, upper side has blast pipe 17, screen pack 16 on having between feed pipe 15 and the blast pipe 17 has following screen pack 21 between discharge nozzle 22 and the air inlet pipe 23, screen pack is taper, one termination feed pipe 15 or discharge nozzle 22, the other end is contained on the housing 24, and there is a truncated cone-shaped slide plate 18 at housing 24 middle parts, and slide plate 18 bottoms have the biconjugate that is bearing on the gusset 19 to connect cone 20.
The normal temperature sizing material enters refrigerating chamber from feed pipe 15, and the Cryogenic air of precooling or freezing sizing material enters refrigerating chamber from air inlet pipe 23 by filter screen 21 sizing material is carried out precooling or freezing, discharges from steam vent 17 through filter screen 16 again, and Cryogenic air is purified through filter screen.Freezing behind assigned temperature when sizing material, stop freezingly, open the discharge valve of discharge nozzle 22, the sizing material that freezes through filter screen 21 and discharge nozzle 22, enters pulverizer by gravity by the cone 20 and the slide plate 18 that are bearing on the plate muscle 19 smoothly.
Among Fig. 3, screen pack 25 on having between feed pipe 40 and the blast pipe 26 has following screen pack 33 between discharge nozzle 35 and the air inlet pipe 36, and screen pack is taper, one termination feed pipe 40 or discharge nozzle 35.The other end is connected on the housing 39, there is an annular chamber 27 lower end of last screen pack 25, annular chamber 27 corresponding to last air inlet pipe 38 and and exterior, the nozzle ring 28 that the bottom of annular chamber 27 is made up of the static blade 41 that is uniformly distributed along the circumference, there is rolling disc 37 below near nozzle ring 28, outer rim at rolling disc 37 is fixed with uniform moving vane 29, moving vane 29 on the rolling disc 37 is just in time relative with static blade 41 on the nozzle ring 28, rolling disc 37 is installed in the upper end of axle 32, axle 32 is installed on upper support 30 and the lower support 31, upper support 30 and lower support 31 are separately fixed on the housing 39, discharge with endless screw device 34 is contained in the lower end of axle 32, is positioned at the top of drainage conduit 35.
The normal temperature sizing material enters in the refrigerating chamber from feed pipe 40, Cryogenic air is from air inlet pipe 36, enter refrigerating chamber by screen pack 33 sizing material is carried out precooling or freezing, discharge from blast pipe 26 through filter screen 25 again, when sizing material freezing behind assigned temperature, stop freezing, and the sizing material that freezes entered pulverizer by drainage conduit 35, discharge simultaneously, introducing general pressure from turbine inlet is that 0.3～0.5MPa(is absolute) temperature is-60～-80 ℃ Cryogenic air, enter in the annular chamber 27 by last air inlet pipe 38, enter nozzle ring 28 then, Cryogenic air expands the back to spray at a high speed and to blow on the moving vane 29 of rolling disc 37 in nozzle ring 28, make rolling disc 37 rotations, and drive 34 rotations of discharge with endless screw device, make sizing material enter pulverizer by drainage conduit 35 smoothly by axle 32.
Because the filtration of last screen pack, the Cryogenic air of discharging from blast pipe is purified, and has guaranteed the safe operation of air circulation process.
Among Fig. 4, the 41st, the stator blade on the nozzle ring 28, the 29th, the moving vane on the rolling disc 37.
Claims (7)
1, a kind of method of air cooling freeze production of glue powder, comprise that the cryogenic gas that the gas refrigeration circulation is obtained is a cryogen, freezing waste old, and pulverize and produce the rubber rubber powder, it is characterized in that: this method is the Cryogenic air that obtains in the single air refrigeration cycle to be directly used in the freezing of rubber size and to carry out low-temperature grinding and produce rubber powder by three refrigerating chambers mode of timing switching successively.
2, the method of claim 1, it is characterized in that the mode that said three refrigerating chambers regularly switch successively is meant and will directly changes the sizing material of freezing precooling at first refrigerating chamber 7a from the Cryogenic air of turbine 6 outlets, the Cryogenic air of discharging from first refrigerating chamber 7a enters the cold limit heat exchange of leading back cold heat exchanger 5, enter second refrigerating chamber 7b then, make normal temperature sizing material wherein obtain precooling, drawing Cryogenic air from turbine 6 outlet enters the 3rd refrigerating chamber 7c and enters 13 pairs of sizing materials of pulverizer with the freezing sizing material to set point of temperature and carry out low-temperature grinding, converge the laggard cold limit heat exchange of becoming owner of back cold heat exchanger 5 from the Cryogenic air that pulverizer 13 is discharged through separator 14 with from the Cryogenic air of refrigerating chamber 7a, three refrigerating chambers regularly switch again and again successively, realize that rubber powder is freezing, precooling, the continued operation of low-temperature grinding and charging.
3, the method for claim 1 is characterized in that in the said kind of refrigeration cycle, returns the cold limit air outlet slit of cold heat exchanger 3 in prime, replenishes dry air by drier 11a, 11b in refrigeration system.
4, method as claimed in claim 1 or 2 is characterized in that in the said kind of refrigeration cycle, and before leading back the hot limit air intlet of cold heat exchanger 5, the common refrigeration by mending cooler 4 is to this hot limit replenish air cold.
5, method as claimed in claim 1 or 2, it is characterized in that in the said kind of refrigeration cycle, to the Cryogenic air after the precooling of normal temperature sizing material, enter the cold limit that prime is returned cold heat exchanger 3, Cryogenic air to sizing material after freezing enters the cold limit of leading back cold heat exchanger 5, and the hot limit counter-flow air of respectively prime being returned cold heat exchanger 3 and leading back cold heat exchanger 5 is carried out exchange heat.
6, a kind of device that is used for the described method of claim 1, comprise that air compressor 1, preceding cooler 10, aftercooler 2, prime return cold heat exchanger 3 and lead back to have between the cold heat exchanger 5 and mend cooler 4, lead back turbine 6 is arranged behind the cold heat exchanger 5, refrigerating chamber 7a, 7b, the 7C of three parallel connections, deduster 8, drier 11, centrifugal-flow compressor 9, it on the refrigerating chamber feed hopper 12, be down pulverizer 13, solid and gas separator 14; It is characterized in that said three refrigerating chamber 7a, 7b, 7C are: screen pack 16 on having between feed pipe 15 and the blast pipe 17, following screen pack 21 is arranged between discharge nozzle 22 and the air inlet pipe 23, screen pack is taper, one termination feed pipe 15 or discharge nozzle 22, the other end is connected on the housing 24, truncated cone-shaped slide plate 18 is arranged in the housing, and the bottom of slide plate 18 has the biconjugate that is bearing on the gusset 19 to connect cone 20.
7, a kind of device of method according to claim 1, it is characterized in that said refrigerating chamber 7 is: screen pack 25 on having between feed pipe 40 and the blast pipe 26, following screen pack 33 is arranged between discharge nozzle 35 and the air inlet pipe 36, screen pack is taper, one termination feed pipe 40 or discharge nozzle 35, the other end is connected on the housing 39, annular chamber 27 is arranged at the bottom of last screen pack 25, corresponding to last air inlet pipe 38, the nozzle ring 28 that annular chamber 27 bottoms are made up of the static blade 41 that is uniformly distributed along the circumference, there is rolling disc 37 below of nozzle ring 28, the outer rim of rolling disc 37 is fixed with moving vane 29, moving vane 29 on the rolling disc 37 is corresponding with the stator blade 41 on the nozzle ring 28, and rolling disc 37 is contained in the upper end of axle 32, and there is discharge with endless screw device 34 lower end of axle 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109325A CN1063546A (en) | 1991-09-29 | 1991-09-29 | The method and apparatus of air cooling freeze production of glue powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109325A CN1063546A (en) | 1991-09-29 | 1991-09-29 | The method and apparatus of air cooling freeze production of glue powder |
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| Publication Number | Publication Date |
|---|---|
| CN1063546A true CN1063546A (en) | 1992-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN91109325A Pending CN1063546A (en) | 1991-09-29 | 1991-09-29 | The method and apparatus of air cooling freeze production of glue powder |
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| CN (1) | CN1063546A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058211C (en) * | 1997-10-23 | 2000-11-08 | 烟台思可达高新技术中试有限公司 | Method and apparatus for treatment of waste steel wire tyre and recovery of fine rubber powder by air refrigerating |
| CN1088645C (en) * | 1999-02-12 | 2002-08-07 | 中国科学院低温技术实验中心 | Preparation method of rubber powder by using waste and old tyre |
| CN1089057C (en) * | 1998-06-22 | 2002-08-14 | 曾绍谦 | Air assistant ultralow temp. method for making plastics powder |
| CN107249750A (en) * | 2014-11-26 | 2017-10-13 | 株式会社爱思迪科学 | Dry ice freezes pulverizer |
-
1991
- 1991-09-29 CN CN91109325A patent/CN1063546A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058211C (en) * | 1997-10-23 | 2000-11-08 | 烟台思可达高新技术中试有限公司 | Method and apparatus for treatment of waste steel wire tyre and recovery of fine rubber powder by air refrigerating |
| CN1089057C (en) * | 1998-06-22 | 2002-08-14 | 曾绍谦 | Air assistant ultralow temp. method for making plastics powder |
| CN1088645C (en) * | 1999-02-12 | 2002-08-07 | 中国科学院低温技术实验中心 | Preparation method of rubber powder by using waste and old tyre |
| CN107249750A (en) * | 2014-11-26 | 2017-10-13 | 株式会社爱思迪科学 | Dry ice freezes pulverizer |
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