CN102876345A - Hard asphalt granulation method and device thereof - Google Patents
Hard asphalt granulation method and device thereof Download PDFInfo
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- CN102876345A CN102876345A CN201210423551XA CN201210423551A CN102876345A CN 102876345 A CN102876345 A CN 102876345A CN 201210423551X A CN201210423551X A CN 201210423551XA CN 201210423551 A CN201210423551 A CN 201210423551A CN 102876345 A CN102876345 A CN 102876345A
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Abstract
The invention relates to a hard asphalt granulation method and a device thereof. The method comprises the following steps: heating hard asphalt to a molten state, delivering the hard asphalt in the molten state to a distributing device capable of adjusting fluid falling speed, evenly distributing the hard asphalt onto a rotary steel belt in a dropwise state, and carrying out forced cooling on the steel belt with a cooling water spraying system arranged below the rotary steel belt, so that cured asphalt granules are separated and fall off from the steel belt at the rotary end of the rotary steel belt. The method has the advantages of simple technical process, low pressure grade, low operating cost, high production efficiency and small pollution, can conveniently adjust the size of the hard asphalt granules, and has strong adaptability to hard asphalts with different softening points (viscosities). The produced asphalt granules have the advantages of uniform size and beautiful appearance, do not directly contact the cooling medium, and can obviously reduce the smoke dust and water pollution in the production process.
Description
Technical field
The invention belongs to the field shaping technique of hard pitch, what relate generally to is a kind of hard pitch prilling process and device thereof.
Background technology
Hard pitch refers to that generally ring and ball softening point is greater than 75 ℃ a class pitch, it forms mainly take resin and asphalt as main, and typical hard pitch has: solvent deoiling pitch, eureka asphalt, coal tar gilsonite, building asphalt, rock asphalt and lake pitch etc.Because the uniqueness of its character, hard pitch more and more comes into one's own in the application in the fields such as modifying road asphalt, asphalt-based coating, polymer modification, electrode adhesive, foundry sand dispersant.But the softening temperature of hard pitch is too high, needs to adopt barreled, packed or ingot casting moulding, and not only small product size is large, and convenience is poor, and utilization brings very large trouble to secondary processing.
Improve the convenience that hard pitch uses, preferably can be processed into granular or powdery.Powdered asphalt processing must be adopted mechanical crushing method, and crushing process can produce a large amount of dust, and operating environment is caused serious pollution, and simultaneously, dust concentration is too high also to be faced with huge security risk.And hard pitch has certain cementability, and its powder easily adheres to and caking, and this shortcoming has seriously restricted its promotion and application.Hard pitch is carried out granulation, can overcome preferably above-mentioned technological deficiency.Existing hard pitch agglomeration technique mainly comprises spray granulation, centrifugal comminution granulation and pelletizing method.The advantage of spray granulation is that production efficiency is high, and particle diameter is little; Shortcoming is that facility investment is larger, and heat-eliminating medium directly contacts with pitch particle, is mixed with light naphtha in the granulation process more, can produce a large amount of waste water and waste gas, easily forms the fiery gas mixture, has larger potential safety hazard.Patent CN 201529509 U, document [Sun Xianfeng etc. colleges and universities' chemical engineering journal, 24(2): 290-294] and document [Liu Zhiqiang. petroleum pitch, 8(3): 57-61] described hard pitch agglomeration technique is spray granulation.CN 10870880 A and CN 1676571 A are the centrifugal comminution granulation of hard pitch, the advantage of this method is the particle diameter that can change by the rotating speed of regulating spray dish or centrifugal pot pitch particle, granulation process does not need plus solvent yet, but, because the viscosity of hard pitch is large, speed of cooling is slow, and the particle diameter of the resulting pitch particle of centrifugal comminution granulation is greater than spray method, therefore the cooling of the resulting pitch particle of this method must need larger effective stroke, also be to say, the gas phase process of cooling need to be higher than spray granulation the cooling tower height, increase front-end investment and running cost without the query meeting; In addition, centrifugal granulating equipment is turning unit, has increased the probability of equipment failure.CN 101050371 A are described to be a kind of molding, granulating coal tar under water method; that coal-tar pitch is got to pitch nodulizer place with pump; nodulizer cuts into unified particle diameter to eu-bitumen under water, and pitch particle siphons away cooling water circulation use by the spiral conveyer that is positioned at the bottom of the pond.The optimization of this patent is the smoke contamination that can reduce in the coal-tar pitch cigarette granulation process, and shortcoming is that production efficiency is low, and pitch particle needs dehydration, drying.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of prilling process and device thereof of hard pitch is provided.The method is suitable for the granulation of the highly viscous fluids such as hard pitch, its technological process is simple, pressure rating and running cost are low, production efficiency is high, the pitch particle size of producing adjustable, good looking appearance, can reduce widely waste water and exhaust emission, the hard pitch of different softening point (viscosity) is had very strong adaptability.
The present invention realizes that the technical scheme that above-mentioned purpose takes is as follows:
Hard pitch prilling process of the present invention is that hard pitch is heated to molten state, the hard pitch of molten state is transported in the distributor of adjustable throttle body falling velocity, be distributed on the revolution steel band to drip shape, turn round up steel band below the cool water shower system is set steel band is carried out forced cooling, the pitch particle of curing molding enters to separate with steel band at the rounded end of revolution steel band and comes off.
The ring and ball softening point of hard pitch of the present invention is 75 ℃-250 ℃.
The cloth temperature of hard pitch of the present invention is 170 ℃-350 ℃.
The distributor of adjustable throttle body falling velocity of the present invention is comprised of inside and outside two portions member, external member can rotate around internals, when outer cloth hole rotates to when aliging with interior distributing trough/hole, the hard pitch of molten state will flow out drippage and be rotated external member and divide and be cut to droplet-like and be dropped on the revolution steel band from distributor.
Hard pitch particle of the present invention be shaped as semisphere, diameter is 2mm-8mm.
The effective cooling length of revolution steel band of the present invention is 12m-30m; Travelling speed is 0.1m/s-0.4m/s.
The device that the present invention produces the hard pitch prilling process comprises hard pitch melting tank, feedstock pump, distributor, external member, internals, revolution steel band, cooling-water pump, cooling trough, cool water shower system and water coolant receiving tank, hard pitch melting tank is communicated with the melting hard pitch import of distributor by feedstock pump, distributor mainly is made of external member and internals, internals links to each other with the asphalt delivery pipe, and lower bottom part is provided with cloth hole in an interior distributing trough or the row at least; External member is enclosed within the outside of internals, externally the circumference of member is evenly equipped with the outer cloth of many groups hole at least, the revolution steel band be arranged on distributor below, below the revolution steel band on top, be provided with cool water shower system and water coolant receiving tank, the cool water shower system is communicated with cooling trough by cooling-water pump, and the water coolant receiving tank is communicated with cooling trough by pipeline.
The present invention is provided with muff heater in the internals of described distributor.
It is cloth hole in the 2mm-10mm that the lower bottom part of internals of the present invention is provided with interior distributing trough or the row's diameter that a width is 2mm-8mm at least.
The present invention is heated to the molten state with good fluidity with hard pitch, then pass through the distributor of adjustable throttle body falling velocity, the hard pitch of molten state is dripped cloth equably carry out the cooling curing moulding at smooth smooth rotary type steel band, this process flow is short, equipment is simple, working pressure is low, is easy to improve output by parallel way.The present invention adopts internals to fix, the distributor of external member rotation carries out the drip-type cloth, the hard pitch of molten state can be divided fast and regularly and be cut to individual droplets in a row, by the rotating speed of regulating the distributor external member or the molten state hard pitch flow that enters internals, can adjust easily the hard pitch granular size, the hard pitch of different softening point (viscosity) is had very strong adaptability.The temperature control heating system is set in the internals of distributor, can prevents that the hard pitch of molten state from reducing and retrogradation in distributor internal cause temperature, flow not smooth, keep cloth even.Adopt thin steel band and water spray to force cooling provision, strengthened heat transfer rate, can accelerate cooling, the curing speed of hard pitch particle, improved production efficiency, and can make hard pitch particle appearance light, deformation reduces.Because spraying cooling water is positioned at the back side of steel band, treats that cold hard pitch particle does not directly contact with water coolant, can not produce pollution to water coolant and product, water coolant can recycle, and has improved the utilization ratio of water coolant; Simultaneously, the hard pitch particle need not drying can be packed after steel band comes off, and has shortened Production Flow Chart, has improved product quality, has reduced process cost, has reduced smoke contamination.
Description of drawings
Fig. 1 is principle process flow sheet of the present invention.
Fig. 2 is the diagrammatic cross-section of distributor of the present invention.
Among the figure, 1, well heater; 2, hard pitch melting tank; 3, feedstock pump; 4, distributor; 4a, insulated protective covering; 4b, external member; 4c, internals; 4d, muff heater; 4e, the import of melting hard pitch; 4f, outer cloth hole; 4g, interior distributing trough/hole; 5,11, rotor; 6, revolution steel band; 7, cooling-water pump; 8, cooling trough; 9, cool water shower system; 10, water coolant receiving tank; 12, product-collecting system; 13, hard pitch particle.
Embodiment
Hard pitch prilling process of the present invention is realized by following steps:
Be that 75 ℃-250 ℃ hard pitch places hard pitch melting tank 2 with ring and ball softening point, be heated to temperature required 170 ℃-350 ℃ of cloth with well heater 1; If hard pitch has been molten state, hard pitch melting tank 2 can be used as the middle heat insulation tank of raw material of the present invention.Molten state hard pitch in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e with feedstock pump 3, start muff heater 4d, make the homo(io)thermism of the molten state hard pitch among the internals 4c of distributor 4 in the processing requirement value.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.1m/s-0.4m/s.Start cooling-water pump 7, the water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from the revolution steel band back side returns cooling trough 8 by water coolant receiving tank 10.Start distributor 4, make external member 4b around internals 4c rotation, when the interior distributing trough on the internals 4c/hole 4g when outer cloth hole 4f on the external member 4b aligns, the hard pitch of molten state will go out along distributing trough or orifice flow; Along with the rotation of external member 4b, the outer cloth hole 4f on the interior distributing trough on the internals 4c/hole 4g and the external member 4b staggers, and the pitch of outflow is cut into and drips shape, drops on the revolution steel band 6, forms the particle of one and a half sphere; Along with distributor 4 and revolution steel band 6 constantly rotate, uniform several rows of hard pitch particle 13 on the steel band 6 will turned round.Hard pitch particle 13 is forced to cooling, curing molding in revolution steel band 6 operation process; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the pitch particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, obtains hemispheric hard pitch particulate product after the collection.
The drip-type prilling granulator of hard pitch of the present invention comprises well heater 1, hard pitch melting tank 2, feedstock pump 3, distributor 4, insulated protective covering 4a, external member 4b, internals 4c, muff heater 4d, melting hard pitch import 4e, outer cloth hole 4f, interior distributing trough/hole 4g, rotor 5, revolution steel band 6, cooling-water pump 7, cooling trough 8, cool water shower system 9, water coolant receiving tank 10, rotor 11 and product-collecting system 12; Hard pitch melting tank 2 is arranged in the well heater 1, and well heater 1 can adopt arbitrarily well heater of known electric heater or circulating hotline heater or other, its objective is hard pitch is heated to molten state so that carry.Hard pitch melting tank 2 is communicated with the melting hard pitch import 4e of distributor 4 by feedstock pump 3; Distributor 4 mainly forms (as shown in Figure 2) by insulated protective covering 4a, external member 4b, internals 4c and muff heater 4d, internals 4c is the tubular mounting block, link to each other with the asphalt delivery pipe, it is cloth hole in the 2mm-10mm that inner chamber hollow, lower bottom part are provided with interior distributing trough or the row's diameter that a width is 2mm-8mm at least.
For the hard pitch retrogradation that prevents molten state is solidified, the component such as pipeline, valve and pump of all transporting molten attitude hard pitch of the present invention must be incubated processing.
The present invention is further elaborated below in conjunction with embodiment.Its purpose is content of the present invention is described better, but protection scope of the present invention is not limited by the cases cited.
The used hard pitch of granulation is that ring and ball softening point that butane solvent deasphalting process obtains is 95 ℃ de-oiled asphalt.
This de-oiled asphalt is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 200 ℃.Start feedstock pump 3, the de-oiled asphalt of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state de-oiled asphalt among the internals 4c of distributor 4 at 200 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.15m/s, the effective cooling length of steel band is 15m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from the revolution steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The interior distributing trough width of distributor 4 is 3mm, and the diameter in outer cloth hole is 2mm.Start distributor 4, make external member 4b around internals 4c rotation, the de-oiled asphalt of molten state is uniform to the upper surface of revolution steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the de-oiled asphalt particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric hard pitch particulate product of 3mm.
The used hard pitch of granulation is that ring and ball softening point that butane solvent deasphalting process obtains is 95 ℃ de-oiled asphalt.
This de-oiled asphalt is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 200 ℃.Start feedstock pump 3, the de-oiled asphalt of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state de-oiled asphalt among the internals 4c of distributor 4 at 200 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.30m/s, the effective cooling length of revolution steel band is 20m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from the revolution steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The interior distributing trough width of distributor 4 is 6mm, and the diameter in outer cloth hole is 5mm.Start distributor 4, make external member 4b around internals 4c rotation, the de-oiled asphalt of molten state is uniform to the upper surface of revolution steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the de-oiled asphalt particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric hard pitch particulate product of 6mm.
The used hard pitch of granulation is that ring and ball softening point that butane solvent deasphalting process obtains is 95 ℃ de-oiled asphalt.
This de-oiled asphalt is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 200 ℃.Start feedstock pump 3, the de-oiled asphalt of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state de-oiled asphalt among the internals 4c of distributor 4 at 200 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.35m/s, the effective cooling length of steel band is 28m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from the revolution steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The interior distributing trough width of distributor 4 is 8mm, and the diameter in outer cloth hole is 6mm.Start distributor 4, make external member 4b around internals 4c rotation, the de-oiled asphalt of molten state is uniform to the upper surface of revolution steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the de-oiled asphalt particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric hard pitch particulate product of 8mm.
Embodiment 4
The used hard pitch of granulation is that ring and ball softening point that butane solvent deasphalting process obtains is 132 ℃ de-oiled asphalt.
This de-oiled asphalt is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 240 ℃.Start feedstock pump 3, the de-oiled asphalt of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state de-oiled asphalt among the internals 4c of distributor 4 at 240 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.20m/s, the effective cooling length of revolution steel band is 19m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The diameter in the interior cloth hole of distributor 4 is 6mm, and the diameter in outer cloth hole is 4mm.Start distributor 4, make external member 4b around internals 4c rotation, the de-oiled asphalt of molten state is uniform to the upper surface of revolution steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the de-oiled asphalt particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric hard pitch particulate product of 5mm.
Embodiment 5
The used hard pitch of granulation is the coal tar gilsonite, and its ring and ball softening point is 161 ℃.
This coal tar gilsonite is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 280 ℃.Start feedstock pump 3, the coal tar gilsonite of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state coal tar gilsonite among the internals 4c of distributor 4 at 280 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.40m/s, the effective cooling length of revolution steel band is 15m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The diameter in the interior cloth hole of distributor 4 is 8mm, and the diameter in outer cloth hole is 5mm.Start distributor 4, make external member 4b around internals 4c rotation, the coal tar gilsonite of molten state is uniform to the upper surface of revolution steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the coal tar gilsonite particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric coal tar hard pitch particulate product of 7mm.
The used hard pitch of granulation is rock asphalt, and its ring and ball softening point is 205 ℃.
This rock asphalt is placed hard pitch melting tank 2, use well heater 1 heating and insulation to 340 ℃.Start feedstock pump 3, the rock asphalt of the molten state in the hard pitch melting tank 2 is delivered among the internals 4c of distributor 4 by melting hard pitch import 4e, start muff heater 4d, make the homo(io)thermism of the molten state rock asphalt among the internals 4c of distributor 4 at 340 ℃.Start revolution steel band system, make revolution steel band 6 along rotor 5 and the 11 speed operations with 0.25m/s, the effective cooling length of revolution steel band is 13m.Start cooling-water pump 7, water coolant in the cooling trough 8 is lowered the temperature by cool water shower system 9 pairs of revolutions steel band 6, the water coolant that falls from the revolution steel band returns cooling trough 8 by water coolant receiving tank 10, keeps the temperature of cooling water in the cooling trough 8 to be not more than 30 ℃.The diameter in the interior cloth hole of distributor 4 is 8mm, and the diameter in outer cloth hole is 6mm.Start distributor 4, make external member 4b around internals 4c rotation, the rock asphalt of molten state is uniform to the upper surface of steel band 6 in rows to drip shape in the distributor, and thereon cooling, curing molding; When revolution steel band 6 ran to the exhaust end surface of revolution of rotor 11, the rock asphalt particle 13 of curing molding separated, comes off with the revolution steel band 6 of bending, and obtaining particle diameter after the collection is the hemispheric rock asphalt particulate product of 5mm.
Claims (9)
1. hard pitch prilling process, it is characterized in that: hard pitch is heated to molten state, the hard pitch of molten state is transported in the distributor of adjustable throttle body falling velocity, be distributed on the revolution steel band to drip shape, turn round up steel band below the cool water shower system is set steel band is carried out forced cooling, the pitch particle of curing molding enters to separate with steel band at the rounded end of revolution steel band and comes off.
2. hard pitch prilling process according to claim 1, it is characterized in that: the ring and ball softening point of described hard pitch is 75 ℃-250 ℃.
3. hard pitch prilling process according to claim 1, it is characterized in that: the cloth temperature of described hard pitch is 170 ℃-350 ℃.
4. hard pitch prilling process according to claim 1, it is characterized in that: the distributor of described adjustable throttle body falling velocity is comprised of inside and outside two portions member, external member can rotate around internals, when outer cloth hole rotates to when aliging with interior distributing trough/hole, the hard pitch of molten state will flow out drippage and be rotated external member and divide and be cut to droplet-like and be dropped on the revolution steel band from distributor.
5. hard pitch prilling process according to claim 1, it is characterized in that: the effective cooling length of described revolution steel band is 12m-30m; Travelling speed is 0.1m/s-0.4m/s.
6. hard pitch prilling process according to claim 1 is characterized in that: described hard pitch particle be shaped as semisphere, diameter is 2mm-8mm.
7. device of producing the described hard pitch prilling process of claim 1, it is characterized in that: this device comprises hard pitch melting tank (2), feedstock pump (3), distributor (4), external member (4b), internals (4c), revolution steel band (6), cooling-water pump (7), cooling trough (8), cool water shower system (9) and water coolant receiving tank (10), hard pitch melting tank is communicated with the melting hard pitch import of distributor by feedstock pump, distributor mainly is made of external member and internals, internals links to each other with the asphalt delivery pipe, and lower bottom part is provided with cloth hole in an interior distributing trough or the row at least; External member is enclosed within the outside of internals, externally the circumference of member is evenly equipped with the outer cloth of many groups hole at least, the revolution steel band be arranged on distributor below, below the revolution steel band on top, be provided with cool water shower system and water coolant receiving tank, the cool water shower system is communicated with cooling trough by cooling-water pump, and the water coolant receiving tank is communicated with cooling trough by pipeline.
8. the device of hard pitch prilling process according to claim 7 is characterized in that: be provided with muff heater (4d) in the internals of described distributor.
9. the device of hard pitch prilling process according to claim 7 is characterized in that: it is cloth hole in the 2mm-10mm that the lower bottom part of described internals is provided with interior distributing trough or the row's diameter that a width is 2mm-8mm at least.
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| CN103952168A (en) * | 2014-01-09 | 2014-07-30 | 湛江市聚鑫新能源有限公司 | Method for preparing high-softening-point asphalt for general grade asphalt carbon fiber from coal tar pitch |
| CN104449787A (en) * | 2014-11-05 | 2015-03-25 | 华文蔚 | Method for producing solid particle asphalt |
| CN107030927A (en) * | 2016-12-30 | 2017-08-11 | 茂名市茂南区生产力促进中心 | Pitch comminutor |
| CN109456784A (en) * | 2018-12-24 | 2019-03-12 | 北京紫瑞天成科技有限公司 | A kind of production unit that casting steel band type pitch is granulated |
| CN110461995A (en) * | 2017-03-14 | 2019-11-15 | 索立迪姆控股公司 | The endogenous asphalitine encapsulating of asphalt material with light fraction recycling |
| CN110902054A (en) * | 2019-12-05 | 2020-03-24 | 安徽金禾实业股份有限公司 | Asphalt treatment integrated machine in maltol production |
| CN112088202A (en) * | 2018-02-28 | 2020-12-15 | 索立迪姆公司 | Endogenous asphaltene encapsulation of oil |
| CN112852493A (en) * | 2019-11-28 | 2021-05-28 | 华东理工大学 | Method and equipment for preparing synthesis gas by gasifying hard asphalt powder |
| CN113457565A (en) * | 2021-06-18 | 2021-10-01 | 南京三普造粒科技有限公司 | Continuous granulation process for powdery chemical products |
| CN114410334A (en) * | 2022-01-13 | 2022-04-29 | 中国神华煤制油化工有限公司 | System and method for cooling and forming liquid asphalt |
| CN116200206A (en) * | 2021-11-30 | 2023-06-02 | 中国石油天然气股份有限公司 | Petroleum high-viscosity hard component curing and forming process and device |
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