CN108708250B - Full regeneration facility of old and useless asphalt mixture - Google Patents
Full regeneration facility of old and useless asphalt mixture Download PDFInfo
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- CN108708250B CN108708250B CN201810723831.XA CN201810723831A CN108708250B CN 108708250 B CN108708250 B CN 108708250B CN 201810723831 A CN201810723831 A CN 201810723831A CN 108708250 B CN108708250 B CN 108708250B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 75
- 239000000203 mixture Substances 0.000 title claims abstract description 62
- 238000011069 regeneration method Methods 0.000 title claims abstract description 29
- 230000008929 regeneration Effects 0.000 title claims abstract description 25
- 239000002699 waste material Substances 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims description 160
- 239000000463 material Substances 0.000 claims description 71
- 238000003756 stirring Methods 0.000 claims description 64
- 238000003860 storage Methods 0.000 claims description 62
- 239000000428 dust Substances 0.000 claims description 50
- 239000000843 powder Substances 0.000 claims description 43
- 238000001035 drying Methods 0.000 claims description 38
- 239000000853 adhesive Substances 0.000 claims description 36
- 230000001070 adhesive effect Effects 0.000 claims description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 239000003546 flue gas Substances 0.000 claims description 30
- 239000000779 smoke Substances 0.000 claims description 28
- 239000002912 waste gas Substances 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 13
- 238000000889 atomisation Methods 0.000 claims description 12
- 238000000746 purification Methods 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 11
- 230000008713 feedback mechanism Effects 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 239000012492 regenerant Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- -1 regenerants Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1009—Plant wherein type or construction of the mixer are irrelevant
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
- E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
Abstract
The invention relates to the field of waste asphalt mixture thermal regeneration, and provides a waste asphalt mixture thermal regeneration technology which is used for processing waste asphalt mixture into new asphalt mixture, and can realize 100% full utilization of the waste asphalt mixture. Compared with the prior art, the invention has the advantages of simple structure, small occupied area and low investment, can realize the full regeneration of the waste asphalt mixture in various modes, is favorable for the application and popularization of the full regeneration technology, and has considerable economic benefit, social benefit and environmental benefit.
Description
Technical Field
The invention relates to the technical field of waste asphalt mixture regeneration, in particular to waste asphalt mixture full-regeneration equipment.
Background
Along with the rapid development of highway construction in China, many asphalt pavement roads enter the period of major and middle repair. A great amount of waste asphalt mixture is produced each year, which not only causes great waste of non-renewable material resources, but also seriously pollutes the environment. The popularization and application of the regeneration technology and equipment of the old asphalt pavement have great economic benefit and social benefit with extremely high environmental protection value. The traditional waste asphalt mixture thermal regeneration equipment is used together with new asphalt mixture stirring equipment, the adding proportion is low (below 50 percent), and the whole utilization of the waste asphalt mixture cannot be realized. With the continuous development of the regeneration technology, the new regeneration material can completely realize the full regeneration of the waste asphalt mixture, and the existing regeneration equipment limits the adding proportion of the waste asphalt mixture, thereby influencing the utilization benefit maximization of the waste asphalt mixture.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the full regeneration equipment for the waste asphalt mixture, so that the full utilization of the waste asphalt mixture is realized, the regeneration quality of the waste asphalt mixture is improved, the investment and the operation cost of construction equipment are reduced, and the full regeneration equipment is energy-saving and environment-friendly, and has considerable economic benefit, social benefit and environmental benefit.
In order to achieve the above purpose, the invention adopts the following technical scheme: the full regeneration equipment for the waste asphalt mixture comprises a primary accurate metering feeding device, a drying and heating device, a multi-stage smoke purification and noise reduction device, a secondary metering and stirring device, a stirring waste gas treatment device and an automatic control system,
the primary accurate metering feeding device comprises a batching hopper, a static quantitative metering mechanism, a dynamic material temporary storage bin, a dynamic flow metering mechanism and a material collecting belt conveying mechanism which are sequentially arranged from top to bottom;
the output end of the aggregate belt conveying mechanism is connected with a lifter;
the drying and heating device comprises a drying cylinder connected with the output end of the lifting machine and a primary circulating dust fall mechanism connected with the input end of the drying cylinder, wherein the primary circulating dust fall mechanism is sequentially connected with a secondary circulating dust fall mechanism and a hot air generation mechanism, and the hot air generation mechanism is connected with the output end of the drying cylinder to form a drying and heating circulating dust fall channel; a discharge port of the secondary circulating dust fall mechanism is connected with a dry powder humidifying device;
the multistage smoke purification noise reduction treatment device comprises a primary smoke adsorption mechanism and an adhesive atomization mixing mechanism which are sequentially connected with the secondary circulation dust fall mechanism, wherein the adhesive atomization mixing mechanism is connected with an adhesive storage tank, the adhesive atomization mixing mechanism is also connected with a bag-type dust remover, one side of the bag-type dust remover is sequentially connected with an induced draft fan, the secondary smoke adsorption noise reduction mechanism and a chimney, the bag-type dust remover is connected with the adhesive storage tank through a first screw conveyor provided with a discharge port, and the adhesive storage tank is provided with a new adhesive inlet for timely supplementing new adhesive;
the secondary metering and stirring device comprises a temporary coarse weighing mechanism, a secondary metering mechanism, a stirring cylinder and a finished product temporary storage bin which are sequentially connected with the discharge end of the drying cylinder, one side of the stirring cylinder is connected with a material adding metering feedback mechanism, the material adding metering feedback mechanism is respectively connected with a liquid storage and conveying mechanism, a powder storage and conveying mechanism, a modified material storage and conveying mechanism and a regenerant adding mechanism, wherein the liquid storage and conveying mechanism is used for conveying water-containing and non-water-containing liquid, the powder in the powder storage and conveying mechanism comprises lime, cement and mineral powder for improving the performance of the fully regenerated asphalt mixture, and the modified material storage and conveying mechanism is used for conveying modified material fibers and anti-rutting agents; the stirring cylinder is connected with a reclaimed powder metering mechanism, and the reclaimed powder metering mechanism is connected with a discharge port of the secondary circulating dust fall mechanism through a second screw conveyor;
the stirring waste gas treatment device comprises a water mist absorbing and converting mechanism, a waste gas treatment mechanism, an induced draft fan and a chimney which are sequentially connected with the stirring cylinder.
Further, the drying cylinder heats the waste asphalt mixture to 120-160 ℃.
The hot air generating mechanism generates hot air with the temperature of 550-600 ℃ to heat the waste asphalt mixture in the drying cylinder in a countercurrent way.
And the stirring cylinder is flexibly connected with the secondary metering mechanism.
The automatic control system controls linkage operation among the primary accurate metering feeding device, the drying and heating device, the multi-stage flue gas purifying and noise reducing treatment device, the secondary metering and stirring device and the stirring waste gas treatment device.
The waste gas treatment mechanism is provided with an adjusting valve, and can be adjusted in proportion according to the quantity of waste gas generated.
The temporary storage coarse weighing mechanism, the secondary metering mechanism, the stirring tank and the finished product temporary storage bin are all provided with heat preservation heating mechanisms outside, so that adhesion of materials is avoided.
According to the technical scheme, the regeneration of the waste asphalt mixture is realized through the following steps: metering various waste asphalt mixtures according to a design formula; the drying and heating device heats the waste asphalt mixture to the required temperature of about 120-160 ℃ through high-temperature hot flue gas at about 600 ℃; the heated waste asphalt mixture enters a temporary storage coarse weighing mechanism; the materials such as waste asphalt mixture, liquid (containing asphalt with various properties), powder, various additive materials, regenerant and the like are measured according to the grading requirement; the stirring device uniformly mixes and stirs various materials to obtain a new asphalt mixture, waste gas generated in the stirring process is treated by the waste gas treatment device, and flue gas generated in the drying and heating process enters the multistage flue gas purifying and noise reducing treatment device after being circularly combusted, so that environment-friendly emission is realized.
Compared with the prior art, the invention has the following beneficial effects: the invention has simple structure, small occupied area of equipment and small investment, can realize the full regeneration of various waste asphalt mixtures of different regeneration materials flexibly according to the performance of the waste asphalt mixtures and the engineering application level, is beneficial to the application and popularization of the full regeneration technology, and has considerable economic benefit, social benefit and environmental benefit;
the primary accurate metering feeding device innovatively divides the traditional material hopper structure into 4 parts, and each part has small material capacity, so that the technical bottleneck problem that the materials of the traditional large-volume storage bin are easy to block is solved, the blocking of the materials is essentially and thoroughly solved, the continuity of material metering is ensured, and accurate metering feeding is realized;
the primary accurate metering feeding device adopts a plurality of metering modes such as a static quantitative metering mechanism, a dynamic flow metering mechanism and the like, and performs complementation calibration to realize accurate metering;
each feed bin in the primary accurate metering feeding device adopts an independent metering mode, and various aggregates can be flexibly added into a reserved metering unit of the primary accurate metering feeding device, so that the grading is adjusted, and the performance of the new asphalt mixture is improved;
the drying cylinder heating material indirectly heats the waste asphalt mixture by using high-temperature hot flue gas, and the heating is mild and the damage to the waste asphalt mixture is less. The waste asphalt mixture enters the roller from one end, hot flue gas at about 600 ℃ generated by the hot gas generator reversely flows into the roller from the other end, the heating efficiency is high, the waste asphalt mixture is ensured to be heated to 120-160 ℃, and the ageing of the waste asphalt mixture and the generation of asphalt smoke are avoided; meanwhile, the drying and heating, hot air flow circulation energy-saving utilization and dust-reducing environmental protection performance are realized.
The secondary metering and stirring device is used for accurately metering materials such as new materials, waste asphalt mixtures, various liquids, powder materials, modified materials, regenerants, asphalt and the like which are selected and added according to grading requirements, and can realize the environment-friendly, energy-saving and efficient full-regeneration functions of common asphalt, modified asphalt, emulsified asphalt and the like; the temporary storage coarse weighing mechanism feeds the material quantity information back to the primary accurate metering feeding device, so that the primary accurate metering feeding device timely adjusts the material quantity and synchronously adjusts the fuel consumption of the hot air generating device, thereby ensuring the continuity, safety and reliability of the whole production flow.
The stirring waste gas treatment device is connected with the stirring cylinder and is used for treating various gases generated by the stirring device, the waste gas treatment device comprises a regulating valve and can be proportionally regulated according to the quantity of the generated waste gas, the waste gas treatment device comprises an oil removing device, a plasma device, a photolysis device, an adsorption device and the like, the front end of the waste gas treatment device is connected with a water mist absorption and conversion mechanism and is used for removing water vapor generated by emulsified asphalt, so that the function that the emulsified asphalt regeneration cannot be realized by conventional regeneration equipment is achieved;
the multistage flue gas purifying and noise reducing treatment device comprises a multistage flue gas purifying and noise reducing treatment device, wherein part of flue gas generated in the heating process of the waste asphalt mixture enters a hot air generating mechanism in a spiral progressive mode for mixed combustion, so that the heat energy recycling is realized, and the high efficiency and the energy conservation are realized; the other part firstly passes through primary smoke purification of a primary circulating dust falling mechanism, a secondary circulating dust falling mechanism, a primary smoke adsorption mechanism, an adhesive atomization mixing mechanism and the like, then goes deep into a bag-type dust remover to carry out secondary smoke purification, and the smoke after the secondary purification is sent into the secondary smoke adsorption mechanism by an induced draft fan to carry out tertiary filtration purification, so that clean air is discharged to reach and be higher than the environmental protection requirement, meanwhile, the equipment noise reduction requirement is met, and the production operation environment is greatly improved.
Compared with the prior art, the invention realizes the environment-friendly, energy-saving and efficient full-regeneration function of the waste asphalt mixture through the innovative technology of primary accurate metering and feeding, secondary metering and stirring, external addition metering and feedback, multi-stage smoke purification and noise reduction treatment, stirring waste gas treatment and integral automatic control.
Drawings
The structure and features of the present invention are further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the primary accurate metering device according to the present invention.
In FIGS. 1 and 2, 1. Primary precision metering feeder, 1-1. Batch hopper, 1-2. Static metering mechanism, 1-3. Dynamic storage hopper, 1-4. Dynamic flow metering mechanism, 1-5. Aggregate belt conveyor mechanism, 2-1. Hoist, 2-2. Primary circulation dust settling mechanism, 2-3. Secondary circulation dust settling mechanism, 2-4. Drying cylinder, 2-5. Hot air generating mechanism, 2-6. Flue gas connecting duct, 3-1. Primary flue gas adsorbing mechanism, 3-2. Adhesive storage tank, 3-3. Adhesive conveying channel, 3-4. Flue gas channel, 3-5. Adhesive atomizing mixing mechanism, 3-6. Flue gas mixing channel, 3-7. Bag collector, 3-8 parts of a first screw conveyor, 3-9 parts of an induced draft fan, 3-10 parts of a secondary smoke adsorption mechanism, 3-11 parts of a chimney, 4-1 parts of a temporary storage coarse weighing mechanism, 4-2 parts of a secondary metering mechanism, 4-3 parts of a reclaimed powder metering mechanism, 4-4 parts of a stirring cylinder, 4-5 parts of a finished product temporary storage bin, 4-6 parts of a construction hopper car, 4-7 parts of a feeding metering feedback mechanism, 4-8 parts of a liquid storage and conveying mechanism, 4-9 parts of a powder storage and conveying mechanism, 4-10 parts of a modified material storage and conveying mechanism, 4-11 parts of a regenerant adding mechanism, 5-1 parts of an exhaust gas connecting channel, 5-2 parts of a water mist absorbing and converting mechanism, 5-3 parts of an exhaust gas treatment mechanism and 5-4 parts of an induced draft fan, 5-5 parts of a chimney, 6 parts of a second screw conveyor, 7 parts of a dry powder humidifying device, 8 parts of a flue gas trend, 9 parts of a regenerated material trend, 10 parts of an exhaust gas trend and 11 parts of an adhesive trend.
Description of the embodiments
Referring to fig. 1 and 2, an embodiment of the invention discloses a full regeneration device of waste asphalt mixture, which comprises a primary accurate metering feeding device 1, a drying and heating device 2, a multi-stage flue gas purifying and noise reducing treatment device 3, a secondary metering and stirring device 4, a stirring waste gas treatment device 5, a second screw conveyor 6, a dry powder humidifying device 7 and an automatic control system,
the primary accurate metering feeding device 1 comprises a batching hopper 1-1, a static quantitative metering mechanism 1-2, a dynamic material temporary storage bin 1-3, a dynamic flow metering mechanism 1-4 and a material collecting belt conveying mechanism 1-5 which are sequentially arranged from top to bottom;
the output end of the aggregate belt conveying mechanism 1-5 is connected with a lifter 2-1;
the drying and heating device comprises a drying cylinder 2-4 connected with the output end of a lifting machine 2-1 and a primary circulating dust fall mechanism 2-2 connected with the input end of the drying cylinder 2-4, wherein the primary circulating dust fall mechanism 2-2 is sequentially connected with a secondary circulating dust fall mechanism 2-3 and a hot air generation mechanism 2-5, and the hot air generation mechanism 2-5 is connected with the output end of the drying cylinder 2-4 to form a drying and heating circulating dust fall channel; the discharge port of the secondary circulating dust fall mechanism 2-3 is connected with a dry powder humidifying device 7;
the multistage smoke purification and noise reduction treatment device comprises a primary smoke adsorption mechanism 3-1 and an adhesive atomization mixing mechanism 3-5 which are sequentially connected with the secondary circulation dust fall mechanism 2-3, wherein the primary smoke adsorption mechanism 3-1 and the adhesive atomization mixing mechanism 3-5 are connected through a smoke channel 3-4; the adhesive atomization mixing mechanism 3-5 is connected with the adhesive storage tank 3-2 through the adhesive conveying channel 3-3; the adhesive atomization mixing mechanism 3-5 is connected with the bag-type dust remover 3-7 through the smoke powder mixing channel 3-6, one side of the bag-type dust remover 3-7 is sequentially connected with a draught fan 3-9, a secondary smoke adsorption noise reduction mechanism 3-10 and a chimney 3-11, the bag-type dust remover is connected with the adhesive storage tank 3-2 through a first screw conveyor 3-8 provided with a discharge port, and the adhesive storage tank 3-2 is provided with a new adhesive inlet for timely supplementing new adhesive;
the secondary metering and stirring device comprises a temporary coarse weighing mechanism 4-1, a secondary metering mechanism 4-2, a stirring cylinder 4-4 and a finished product temporary storage bin 4-5 which are sequentially connected with the drying cylinder 2-4, wherein one side of the stirring cylinder 4-4 is connected with a material adding metering feedback mechanism 4-7, and the material adding metering feedback mechanism 4-7 is respectively connected with a liquid storage and conveying mechanism 4-8, a powder storage and conveying mechanism 4-9, a modified material storage and conveying mechanism 4-10, a regenerant adding mechanism 4-11 and the like; the stirring cylinder 4-4 is connected with a reclaimed powder metering mechanism 4-3, and the reclaimed powder metering mechanism 4-3 is connected with a No. 2 material opening in the secondary circulating dust falling mechanism 2-3 through a second screw conveyer 6.
The stirring waste gas treatment device 5 comprises a water mist absorbing and converting mechanism 5-2, a waste gas treatment mechanism 5-3, an induced draft fan 5-4 and a chimney 5-5 which are connected with the stirring cylinder 4-4 sequentially through a waste gas connecting channel 5-1.
The automatic control system automatically controls the waste asphalt mixture full-regeneration equipment to complete the whole production flow.
When the embodiment of the invention is used, crushed and screened waste asphalt mixtures with different particle diameters sequentially pass through a primary accurate metering feeding device 1, a lifting machine 2-1 and a drying cylinder 2-4, heated and dried waste asphalt mixtures enter a secondary metering stirring device 4, and qualified asphalt mixtures are produced and added into a construction material receiving hopper car 4-6 for pavement construction; part of flue gas generated by the drying and heating links of the waste asphalt mixture passes through the multistage flue gas purifying and noise reducing treatment device 3, and the gas is purified by filtration and then is discharged in a clean and environment-friendly way; the waste gas generated by the secondary metering and stirring device 4 when the waste asphalt mixture is treated by the stirring waste gas treatment device 5, so that clean and environment-friendly emission is realized.
The primary accurate metering feeding device 1 is formed by combining a proportioning hopper 1-1, a static quantitative metering mechanism 1-2, a dynamic material temporary storage bin 1-3 and a dynamic flow metering mechanism 1-4, meanwhile, the primary accurate metering device 1 reserves a plurality of units for selection, meets the addition requirement of construction specifications, improves the adaptability of the equipment, and when the equipment works specifically, waste asphalt mixtures with different specifications are sent to the proportioning hopper 1-1 for independent storage through crushing and screening, a movable discharging door of the proportioning hopper 1-1 is opened, materials enter the dynamic material temporary storage bin 1-3 after being weighed by the static quantitative metering mechanism 1-2, the dynamic material temporary storage bin 1-3 is always in a non-shortage continuous feeding state through an automatic control system 8, and the dynamic flow metering mechanism 1-4 carries out dynamic flow conveying metering on various specifications of materials from the dynamic material temporary storage bin 1-3; the materials with different specifications are subjected to error complementation through the static quantitative metering mechanism 1-2 and the dynamic flow metering mechanism 1-4, the accurate metering of the materials with various specifications is realized under the control of the automatic control system 8 so as to meet the accurate implementation of each subsequent link, and the accurately metered materials are sequentially sent into the lifting machine 2-1 and the drying cylinder 2-4 under the action of the aggregate belt conveying mechanism 1-5 to be dried and heated.
The primary accurate metering feeding device 1 innovatively divides the traditional material hopper structure into 4 parts, and each part has small material capacity, so that the technical bottleneck problem that the material of a large-volume storage bin is easy to block is solved, the material blockage is essentially and thoroughly solved, and the accurate metering feeding is realized.
The hot air generating mechanism 2-5 in the drying and heating system device 2 generates hot air, materials in the drying cylinder 2-4 are heated to required stirring temperature through the countercurrent heating of the hot air, and then the materials are put into the temporary storage coarse weighing mechanism 4-1 for heat preservation temporary storage and coarse weighing before stirring, so that the feedback information of the feeding quantity in the primary accurate metering feeding device 1 is achieved. During concrete work, the drying cylinder 2-4 carries out secondary dust fall and stores in the secondary circulating dust fall mechanism 2-3 through the recovered powder after the primary circulating dust fall mechanism 2-2, when the recovered powder is used in asphalt mixture production, the material opening 1 at the bottom of the secondary circulating dust fall mechanism 2-3 is normally closed, the material opening 2 is normally opened, the recovered powder enters the recovered powder metering mechanism 4-3 through the screw conveyor B6, and the recovered powder enters the stirring cylinder 4-4 to be used as powder after being metered by the recovered powder metering mechanism 4-3; when the reclaimed powder is not used in the production of asphalt mixture, the No. 2 material opening is normally closed, and the reclaimed powder is closed and passes through the screw conveyor B6, namely, the supply of the reclaimed powder in the stirring process is cut off, the No. 1 material opening is normally open, and the reclaimed powder is sent into the dry powder humidifying device 7 for dust fall and then harmless treatment.
The hot flue gas collected by the primary circulating dust falling mechanism 2-2 enters the secondary circulating dust falling mechanism 2-3 through a flue gas pipeline for dust falling and filtering, and part of the hot flue gas enters the hot air generating mechanism 2-5 for secondary backfire to remove harmful substances, and meanwhile, the heat of the flue gas is recycled, so that the energy saving purpose is achieved; the other part of the flue gas enters a primary smoke adsorption mechanism 3-1, the flue gas after primary adsorption enters an adhesive atomization mixing mechanism 3-5 through a flue gas channel 3-4 and is fully atomized and mixed with the adhesive conveyed in an adhesive storage tank 3-2, the mixed flue powder (flue gas and powder mixture) enters a bag-type dust remover 3-7 through a flue gas mixing channel 3-6 to carry out gas and powder separation, purification and dust removal, and the flue gas after purification and dust removal is sent to a secondary smoke adsorption noise reduction mechanism 3-10 through a draught fan 3-9 to further remove odor, adsorb, purify and reduce noise so that the flue gas reaches the requirements higher than environmental emission standards, and is discharged into the air through a chimney 3-11.
After the adhesive is fully atomized and mixed with the smoke, the smoke is filtered by a bag-type dust remover 3-7, dust attached with smoke harmful substances is conveyed to an adhesive storage tank 3-2 by a screw conveyor A3-8 for recycling, when the attached smoke harmful substances are detected to reach a saturated state, a discharge port reserved at the position of the screw conveyor A3-8 is opened for discharge, and pollution-free treatment is carried out on the dust or the dust is recycled as a stirring raw material, so that raw materials are saved.
When the secondary metering and stirring device 4 works, materials heated to the required temperature are freely blanked in the drying cylinder 2-4, enter the temporary storage coarse weighing mechanism 4-1 for heat preservation temporary storage and coarse weighing before stirring, so that the feeding quantity feedback information in the primary precise metering and stirring device 1 is fed back, the primary precise metering and stirring device 1 timely adjusts the feeding quantity, and synchronously adjusts the fuel consumption of the hot air generating mechanism 2-5, so that the continuity, safety and reliability of the whole production flow are ensured, and the materials output from the temporary storage coarse weighing mechanism 4-1 are precisely metered before final stirring in the secondary metering mechanism 4-2 and then enter the stirring cylinder 4-4 for stirring.
In the stirring process, various liquids (containing water and no water), powders (lime, cement, mineral powder and the like), modified materials (fibers, anti-rutting agents and the like), regenerants and the like are required to be externally added according to the quality of old asphalt in the recycled waste asphalt mixture and the requirements of construction specifications, and the materials are respectively selected from a liquid storage and conveying mechanism 4-8, a powder storage and conveying mechanism 4-9, a modified material storage and conveying mechanism 4-10, a regenerant adding mechanism 4-11 and the like and are metered and added into a stirring cylinder for stirring under the control of an automatic control system 8 through a material adding metering feedback mechanism 4-7, so that a finished product material meeting the requirements of the construction specifications is produced through stirring.
Externally added various liquids (aqueous and non-aqueous) include various asphalts such as raw asphalt, modified asphalt, emulsified asphalt and the like, and also include various other aqueous or non-aqueous liquids for improving the performance of the fully reclaimed asphalt mixture.
And (3) putting qualified finished product materials produced by the stirring cylinder 4-4 under all the working conditions into the finished product material temporary storage bin 4-5 for heat preservation and storage, discharging after the construction hopper car 4-6 reaches a stop, and finishing loading and transporting the finished product materials to a construction site for engineering construction.
The water mist absorbing and converting mechanism 5-2 in the stirring exhaust gas treatment device 5 absorbs and converts various harmful substances such as water vapor and asphalt smoke and the like discharged from the stirring tank, and recycles the water vapor in the converted and absorbed tail gas again, and the exhaust gas treated by the water mist absorbing device 5-2 enters the exhaust gas treatment mechanism 5-3, so that various toxic, harmful and peculiar components in the exhaust gas are further subjected to clean treatment, and are discharged through the chimney 5-5 through the induced draft fan 5-4 after reaching the environmental protection discharge standard.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and the present invention should not be construed as limited to the embodiments, but rather should be construed according to the appended claims and the equivalents and modifications thereof, and the invention is intended to fall within the scope of the invention.
Claims (5)
1. The utility model provides a full regeneration facility of old and useless pitch mixture, includes elementary accurate measurement feedway, stoving heating device, multistage flue gas purification noise reduction device, second grade measurement agitating unit, stirring exhaust treatment device and automated control system, its characterized in that:
the primary accurate metering feeding device comprises a batching hopper, a static quantitative metering mechanism, a dynamic material temporary storage bin, a dynamic flow metering mechanism and a material collecting belt conveying mechanism which are sequentially arranged from top to bottom;
the output end of the aggregate belt conveying mechanism is connected with a lifter;
the drying and heating device comprises a drying cylinder connected with the output end of the lifting machine and a primary circulating dust fall mechanism connected with the input end of the drying cylinder, wherein the primary circulating dust fall mechanism is sequentially connected with a secondary circulating dust fall mechanism and a hot air generation mechanism, and the hot air generation mechanism is connected with the output end of the drying cylinder to form a drying and heating circulating dust fall channel; a discharge port of the secondary circulating dust fall mechanism is connected with a dry powder humidifying device;
the multistage smoke purification noise reduction treatment device comprises a primary smoke adsorption mechanism and an adhesive atomization mixing mechanism which are sequentially connected with the secondary circulation dust fall mechanism, wherein the adhesive atomization mixing mechanism is connected with an adhesive storage tank, the adhesive atomization mixing mechanism is also connected with a bag-type dust remover, one side of the bag-type dust remover is sequentially connected with an induced draft fan, the secondary smoke adsorption noise reduction mechanism and a chimney, the bag-type dust remover is connected with the adhesive storage tank through a first screw conveyor provided with a discharge port, and the adhesive storage tank is provided with a new adhesive inlet for timely supplementing new adhesive;
the secondary metering and stirring device comprises a temporary coarse weighing mechanism, a secondary metering mechanism, a stirring cylinder and a finished product temporary storage bin which are sequentially connected with the discharge end of the drying cylinder, one side of the stirring cylinder is connected with a material adding metering feedback mechanism, the material adding metering feedback mechanism is respectively connected with a liquid storage and conveying mechanism, a powder storage and conveying mechanism, a modified material storage and conveying mechanism and a regenerant adding mechanism, wherein the liquid storage and conveying mechanism is used for conveying water-containing and non-water-containing liquid, the powder in the powder storage and conveying mechanism comprises lime, cement and mineral powder for improving the performance of the fully regenerated asphalt mixture, and the modified material storage and conveying mechanism is used for conveying modified material fibers and anti-rutting agents; the stirring cylinder is connected with a reclaimed powder metering mechanism, and the reclaimed powder metering mechanism is connected with a discharge port of the secondary circulating dust fall mechanism through a second screw conveyor;
the stirring waste gas treatment device comprises a water mist absorbing and converting mechanism, a waste gas treatment mechanism, a draught fan and a chimney which are sequentially connected with the stirring cylinder;
the drying cylinder heats the waste asphalt mixture to 120-160 ℃;
and the stirring cylinder is flexibly connected with the secondary metering mechanism.
2. The full recycling device for waste asphalt mixture according to claim 1, characterized in that: the temporary storage coarse weighing mechanism, the secondary metering mechanism, the stirring tank and the finished product temporary storage bin are all provided with heat preservation heating mechanisms outside, so that adhesion of materials is avoided.
3. The full recycling device for waste asphalt mixture according to claim 1, characterized in that: the hot air generating mechanism generates hot air with the temperature of 550-600 ℃ to heat the waste asphalt mixture in the drying cylinder in a countercurrent way.
4. The full recycling device for waste asphalt mixture according to claim 1, characterized in that: the automatic control system controls linkage operation among the primary accurate metering feeding device, the drying and heating device, the multi-stage flue gas purifying and noise reducing treatment device, the secondary metering and stirring device and the stirring waste gas treatment device.
5. The full recycling device for waste asphalt mixture according to claim 1, characterized in that: the waste gas treatment mechanism is provided with an adjusting valve, and can be adjusted in proportion according to the quantity of waste gas generated.
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| CN201810723831.XA CN108708250B (en) | 2018-07-04 | 2018-07-04 | Full regeneration facility of old and useless asphalt mixture |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109322227A (en) * | 2018-11-21 | 2019-02-12 | 无锡锡通工程机械有限公司 | A kind of asphalt mixing plant with synchronization and double measure |
| CN109338853A (en) * | 2018-11-21 | 2019-02-15 | 无锡锡通工程机械有限公司 | A kind of synchronization and the regeneration of double measure and primary integrated asphalt mixing plant |
| CN110344305B (en) * | 2019-08-14 | 2023-11-24 | 福建泉成机械有限公司 | Asphalt mixture regenerating equipment and method |
| CN112030670B (en) * | 2020-09-07 | 2021-11-05 | 福建省铁拓机械股份有限公司 | Equipment and process for preparing asphalt mixture |
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