CN100496686C - Differential double-horizontal-shaft asphalt regeneration stirrer - Google Patents
Differential double-horizontal-shaft asphalt regeneration stirrer Download PDFInfo
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- CN100496686C CN100496686C CNB2007101226132A CN200710122613A CN100496686C CN 100496686 C CN100496686 C CN 100496686C CN B2007101226132 A CNB2007101226132 A CN B2007101226132A CN 200710122613 A CN200710122613 A CN 200710122613A CN 100496686 C CN100496686 C CN 100496686C
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 23
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- 238000003756 stirring Methods 0.000 claims description 58
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- 238000007599 discharging Methods 0.000 description 4
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Abstract
The invention is used in the pitch hot regeneration project of the pitch road surface construction and maintenance. A differential double horizontal shaft pitch regeneration agitator consists of a big agitating shaft and a small agitating shaft which are provided with agitating propellers, an agitator shell, a deceleration case, a gear pair and a frame. The big agitating shaft adopts a hollow cylinder shaped structure to be used as the drying cylinder of a new aggregate. The propeller bay number ratio of the big and the small agitating shafts is differential ratio; the speed ratio of the small agitating shaft to the big agitating shaft is the same as the ratio of the differential ratio. The space between the big and the small agitating shafts is a differential agitating area of the materials. The new and old materials are fully mixed and agitated with the pitch and the mineral powder in the differential agitating area; the over hot new aggregate and the radiating heat of the drying cylinder wall are utilized to heat the old pitch recycled The various work procedures needed by the pitch hot regeneration can be completed and the eligible regenerated pitch mixed material finished products can be produced just by one differential double horizontal shaft pitch regeneration agitator can finish.
Description
Technical field
The invention belongs to the equipment technical field of building, repairing usefulness of covering of roadway, particularly a kind of equipment for preparing paving material-asphalt-regenerating mixture.Be applicable in asphalt pavement construction and the maintenance, the reengineer of asphalt, when also can be used for newly-built bituminous paving, the processing of new asphalt.
Technical background
No matter be in asphalt pavement construction or maintenance engineering, the method for asphalt is stirred in processing, mainly is to use the production technology of " plantmix's hot asphalt mixture ".When needs use old bitumen recovery material to produce asphalt, then need to use asphalt-regenerating mixture processing method, the production technology that Here it is " plantmix's heated bitumen regenerating mixture ".In the practicality, " plantmix's heated bitumen regenerating mixture " comprised the content of " plantmix's hot asphalt mixture ".That is to say, use the production technology of " plantmix's heated bitumen regenerating mixture " also can produce " plantmix's hot asphalt mixture "; Otherwise the production technology of only using " plantmix's hot asphalt mixture " is to produce the asphalt of regeneration.
Different with the production technology of producing " plantmix's hot asphalt mixture ", the mixing plant that is used for processing " plantmix's heated bitumen regenerating mixture " there is specific (special) requirements, owing to need to add old bitumen recovery material, the function that old bitumen recovery material is heated must be arranged in equipment, also to have various new, old materials are fully stirred the condition that makes old pitch obtain regenerating under the state of heat.
The equipment of processing " plantmix's heated bitumen regenerating mixture " is " plantmix's heated bitumen regenerating mixture " mixing plant of a kind of special use, and it should have following three master operations (except the operations such as metering of material) at least:
Operation is 1.--and the oven dry of cold aggregate also is heated to the temperature of regulation (to the plain asphalt concrete is 155 ~ 165 ℃, to modified asphalt concrete is 175 ~ 185 ℃, if and add old asphalt mixture, need shift a part of heat from overheated new aggregate and give old material, thereby, look old the ratio that material adds, the overtemperature of new aggregate needs more than 180 ℃, some in addition up to 230 ℃);
Operation is 2.--various materials mixed;
Operation is 3.--(ratio of old material is generally 5 ~ 30% owing to will add a certain proportion of old bitumen recovery material in " plantmix's heated bitumen regenerating mixture ", can reach 50%), the old bitumen recovery material that must will be in cold conditions is also dried and is heated, (same, the heated final temperature of old material, to the plain asphalt concrete is 155 ~ 165 ℃, is 175 ~ 185 ℃ to modified asphalt concrete).3. this operation is exactly the specific function that mixing plant possessed of " plantmix's heated bitumen regenerating mixture ".
Existing known, the widely used plant equipment that " plantmix's heated bitumen regenerating mixture " stirred in processing that is used for mainly contains dual mode: a. batch (-type) asphalt-regenerating mixture mixing plant and b. continuous asphalt regenerating mixture mixing plant.
The operation of wherein more outstanding batch (-type) asphalt-regenerating mixture mixing plant 1., 2., 3. by three separately independently mechanism finish: use aggregate oven dry tube to dry cold aggregate (operation is 1.); Use twin-shaft mixer to come various materials are mixed (operation 2.); Use special " the second oven dry tube " to dry heating old bitumen recovery material (operation 3.).Even this reasonable batch (-type) asphalt-regenerating mixing plant, its shortcoming also is a lot, such as:
Mechanism various (operation 1., 2., 3. need with three separately independently mechanism finish), equipment is huge; Next is, in the oven dry of special use with heat in " the second oven dry tube " of old bitumen recovery material, a large amount of pitch waste gas (blue smoke) that will produce, need burn again to reduce the discharging of harmful exhaust to waste gas, the technical difficulty that waste gas burns again is big, expense is high, do not handle directly discharging if do not add, then useless bitumen flue gas will cause secondary pollution to environment; In the batch (-type) twin-shaft mixer, various materials are mixed, need the lengthening mixing time, be beneficial to the regenerative process of old pitch, but will reduce output thus.
So various being used for processes among the equipment of " heated bitumen regenerating mixture ", batch (-type) asphalt-regenerating mixing plant has very big shortcoming.
However, also establishing just because of the batch (-type) stirring is independently to finish each operation separately in the mechanism separately, especially mix operation 2., just can use classic " twin-shaft mixer " of generally acknowledging at present, thereby guarantee the good quality that mixes.
Continuous asphalt regenerating mixture mixing plant then can be with above-mentioned three process 1., 2., 3. finish in " drum-type " (or " rotary hub type ") main frame of a uniqueness.Known, more representational " drum-type " asphalt stirring host has three kinds of forms:
Though " single horizontal axis " mixer of mode 3 conducts " forced action type " of above-mentioned continuous asphalt regenerating mixture mixing plant has had progress than the stirring technique of " gravity type " of mode 1 and mode 2, but in the mixing plant of construction material, the performance of " single horizontal axis " mixer is not best, and it is more very different than the mixing effect of " dual horizontal axle " mixer that it the most frequently used batch (-type) asphalt-regenerating mixing plant is adopted.Such as, parameters such as the quantity of the leaf oar of " single horizontal axis " mixer, shape, setting angle, arrangement mode can influence mixing quality strongly, especially " single horizontal axis " mixer is not as " dual horizontal axle " mixer, material by the leaf oar of two axles laterally stirring repeatedly, has formed strong local convection between two parallel axes.Thereby the mixing quality that makes above-mentioned use " single horizontal axis " carry out mode 3 double drum types of stirring technique (U.S. DOUBLE BRAL) asphalt mixing plant is subjected to query in the industry, to such an extent as to it comes out over more than 20 year except continental United States, use is very few in developed countries such as Europe, days, and is few especially in China.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the shortcoming of above-mentioned all kinds of " heated bitumen regenerating mixture stirring host ", has designed brand-new " differential double-horizontal-shaft asphalt regeneration stirrer ".
In the mixing mixing plant of construction material, " dual horizontal axle " mixer is more more outstanding than it " single horizontal axis " mixer to be the known fact.So various mixing plants that use with China engineering circle abroad, wherein the overwhelming majority is " dual horizontal axle " mixer: such as, Cement Concrete Mixing has uses twin-shaft mixer more than 99%, asphalt concrete mixer adopts twin-shaft mixer also to have more than 90%; Again for another example, most popular grinding coagulation soil mixing station in hydraulic engineering and highway engineering, the occasion of various use continous way mixing plants such as most popular stabilized soil mixing station, asphalt slurry seal coat machine, the little table of pitch place equipment in highway engineering then is that same form ground uses continous way " dual horizontal axle " mixer clearly.Maturity that it serves to show the twin-shaft mixer technology with and the stability and the reliability of mixing quality, be that " single horizontal axis " mixer is far incomparable.
But, known, as to be widely used all " dual horizontal axle " mixers, they be a kind of with horizontally-mounted two parallel shafts in relative rotation mode stir operation, the paddle oar of installing on two horizontal axis also is identical, its structure is the same, quantity is the same, arrangement is the same, the diameter of leaf oar end points too.So known twin-shaft mixer can't be when stirring operation (operation 2.), bear heating of heating, oven dry and old bitumen recovery material such as aggregate etc. (operation 1., operation 3.) asphalt-regenerating mixture again and process necessary operation.
For outstanding " dual horizontal axle " alr mode of whipping performance also can be applied in the production of asphalt-regenerating mixture, transformation that must be basic in addition to existing twin-shaft mixer.
The design that the present invention puts forward can reach well in one " differential double-horizontal-shaft asphalt regeneration stirrer ", finish above-mentioned asphalt-regenerating mixture process necessary operation 1., 2., purpose 3..
For this reason, the technical solution used in the present invention is: a kind of differential double-horizontal-shaft asphalt regeneration stirrer comprises two shaft and supporting, burner, shell, drive motors, reduction box, gear pair and frames that the paddle oar is housed.
Enlarged diameter with wherein a shaft, form a huge hollow cylindrical arrangement in the middle of making it, flight is installed in this tube, one end of tube is loaded onto burner, the oven dry tube that promptly can be used as aggregate uses, and the oven dry of new aggregate and heating are carried out in this tube, and this has born asphalt manufacturing procedure function 1., utilize the outer wall of this oven dry tube to load onto many row's paddle oars, promptly constituted the big shaft of " differential double-horizontal-shaft mixer ";
The shaft that another root also is equipped with the leaf oar is then remained stationary, as the little shaft of " differential double-horizontal-shaft mixer ";
Row's number of the leaf oar of big shaft is more than row's number of little agitating axle leaf oar, the ratio of the leaf oar of large and small shaft row number is defined as " differential ratio ", and its value is 2,2.25,2.5,2.75,3,3.25,3.5,3.75,4,4.25,4.5,4.75,5 or the like;
In the drive motors of two shafts, big shaft is selected for use and their " differential ratio " identical ratio the speed ratio of little shaft, large and small shaft rotates relative to ecto-entad, large and small shaft rotates with " differential rotating speed ", leaf oar on large and small two shafts is arranged and is staggered mutually, do not produce collision during work and interfere, the space between large and small two shafts has formed " the differential stirring area " of material;
According to the diameter of two groups of paddle oars of large and small shaft and reserve the gap of leaf oar and liner plate, the shell of the mixer of a respective shapes of configuration;
The leaf oar of large and small shaft stirs axial setting angle respectively and separately between 15 ° ~ 50 °, this angle can be adjusted, so that the material that control is stirred both can be along the lateral shuttle convection current between the axis of large and small two shafts in " differential stirring area ", also to promote material and advance, the convection current mixing efficiency of strength imparting material along the direction that parallels to the axis;
The plane of the center line by two axles, become skewed with horizontal plane, the value at this angle of inclination is relevant with " differential ratio ", greatly between 10 ~ 40 °, so that the paddle oar is when stirring material, material can remain in the effective range of mixing efficiency best " differential stirring area " under the double action of deadweight and mixing power, and 2. and 3. the asphalt manufacturing procedure carries out in " differential stirring area ".
The leaf oar row number of large and small two shafts, the quantity of every row's leaf oar, the setting angle of each leaf oar can be adjusted flexibly, to adapt to the requirement of mixing the various asphalts of system.
By abovementioned technology, promptly constituted " differential double-horizontal-shaft asphalt regeneration stirrer " that to bear asphalt 3 kinds of functions of processing (operation 1., 2. and 3.) simultaneously.
The course of work of the present invention is as follows:
(1), carry out continuous feeding to differential double-horizontal-shaft asphalt regeneration stirrer:
New aggregate (cold conditions), the charge door on the right of big shaft inner core (i.e. oven dry tube) joins the oven dry tube; Old bitumen recovery material (cold conditions) is added into the differential stirring area of chuck of big shaft (oven dry tube) outside from the old material inlet on the chuck left side of big shaft (oven dry tube) outside; Pitch (liquid, heat) from the pitch inlet on the left side, joins in the differential stirring area of chuck of big shaft (oven dry tube) outside; Breeze (cold conditions) from the breeze on left side inlet, joins in the differential stirring area of chuck of big shaft (oven dry tube) outside.
(2), axis and the level of oven dry tube have a little inclination angle, (this inclination angle is about 3 ~ 5 °, newly the feed end height of aggregate, flame end is low), when the oven dry tube rotated, the aggregate in the oven dry tube was kicked up by flight, falls again, make helical flow so repeatedly, its direction is a helix from right to left, and oven dry tube left side is provided with burner, and flame from left to right, with the reverse convection current of aggregate, make aggregate heating, dehydration, overheated.
(3), dried and be heated to the hot aggregate of predetermined temperature, be discharged to the differential stirring area of oven dry tube outer (shaft greatly) from the discharging opening of oven dry tube left end.
(4), the differential stirring area between large and small shaft, hot aggregate successively runs into old bitumen recovery material, pitch and the breeze that adds from several charge doors.
(5), under the promotion of the paddle oar of large and small shaft, various materials one side is along the direction of shaft, on one side perpendicular to laterally from left to right being stirred of shaft, mixed, carry out mass transfer and heat transfer, up to being evenly distributed of the temperature unanimity of the mixture of various materials, each component, arrived the low order end of differential stirring area, just finished whole operations such as the mixing of new, old material and pitch breeze and the regeneration of pitch 1., 2. and 3., the right lower quadrant from differential stirring area is discharged to outside the machine at last.The heating process of old bitumen recovery material is the thermal-flame of catalytic combustion device not, but the radiant heat that utilizes the barrel of overheated aggregate and big shaft carries out, so, heating process to old pitch in the asphalt heat recycling process is very gentle, has stopped thermal-flame and may produce consequence aging even that burn to pitch again.
(6), the process of mixing with overheated aggregate in the differential stirring area of old bitumen recovery material between above-mentioned large and small shaft, also be " heat transfer " and " mass transfer " process new, old material.The approach that heats old bitumen recovery material thermal source has two: overheated new aggregate, and the radiant heat of oven dry barrel, " heat transfer " process is through differential stirring area all the time.And " mass transfer " in differential stirring area, then at first being old bitumen recovery material forwards the part of the old pitch that wraps up in its old aggregate the surface of new aggregate to, also pitch and the breeze that newly adds is mixed mutually with new, old material simultaneously, make it to reach evenly wrap up in deposited.In the same time, small amount of moisture in the old bitumen recovery material is then evaporated by high temperature, add the blue smoke of old pitch evaporation, the combustion zone of the powerful negative pressure inspiration high temperature of the flame of the burned device of discharge gate of the oven dry tube by being positioned at differential stirring area left end then, blue cigarette is by high-temperature flame, with burnt gas, discharge by deduster from the right-hand member of oven dry tube.Thereby the design can stop the secondary pollution of the bitumen flue gas that produces in the asphalt heat recycling process.
The present invention compared with prior art its beneficial effect is, it gets up the advantages of the oven dry tube of traditional twin-shaft mixer and traditional asphalt mixing plant dexterously, overcome the shortcoming when " DOUBLE BRAL " carries out mixing of materials in the mode of " single horizontal axis " mixer simultaneously, improved the quality of asphalt-regenerating mixture greatly.
The design of " differential double-horizontal-shaft " mixer is a core of the present invention.Adopt the solution of the present invention, enlarged diameter with a shaft of common twin-shaft mixer, utilize the tubular construction of this shaft hollow to arrange burner, the tube inwall is equipped with the aggregate flight, just formed " the oven dry tube " that to dry the heats cold aggregate, to dry tube then as a huge shaft, utilize differential principle again, the leaf oar that has solved large and small shaft dexterously is interference and collision mutually not, and has formed " a differential stirring area " that fabulous mixed effect is arranged between large and small shaft.Finally realized " oven dry tube " and " twin-shaft mixer " integrated, be called " differential double-horizontal-shaft asphalt regeneration stirrer ".
The design has thoroughly overcome the shortcoming when " DOUBLE BRAL " carries out the mixing of material in the mode of " single horizontal axis " mixer, the independent separately many disadvantages brought of dedicated drying tube that also overcome twin-shaft mixer in the batch (-type) asphalt-regenerating mixing plant, aggregate oven dry tube and heated old bitumen recovery material.Improve the quality of asphalt-regenerating mixture greatly, improved the thermal efficiency.Solve the burning again of the blue smoke that produces when old pitch is dried simultaneously, avoided pitch waste gas to second environmental pollution, and simplified the structure, lowered manufacturing cost.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a structural representation of the present invention (when shell is made transparent processing);
Fig. 3 is the cross sectional representation (copy plate 17 in the oven dry tube has omitted) of Fig. 1;
Fig. 4 is the A-A cutaway view of Fig. 3.
The flow direction of 1-aggregate in oven dry tube wherein, aggregate in oven dry tin by the adverse current heating, drying; The rolling ring of 2-oven dry tube; 3-finished product material outlet (in the bottom of differential mixer); The little shaft of 4-(the paddle slurry is housed), it and the common differential double-horizontal-shaft mixer of forming of the paddle slurry of big shaft; The paddle slurry of the little shaft of 5-; The flow direction of the various materials of 6-in differential mixer; The hot aggregate of 7-is from drying an outlet that is discharged to differential stirring area, and an oven dry tube left end has opening, and the aggregate of having dried is from here by the differential stirring area outside the oven dry expelling tube; The old material of 8-, pitch, breeze enter into the outer differential stirring area of oven dry tube, meet with hot aggregate; The burner of 9-oven dry tube, flame zone is opposite with the flow direction of new aggregate, for adverse current dry by the fire in; The old bitumen recovery material inlet of 10-; 11-pitch inlet; 12-breeze inlet; The paddle slurry of the big shaft of 13-; The big shaft of 14-, promptly the oven dry tube is equipped with the paddle oar on its outer wall; The shell that 15-is fixing; The 16-driving gear pair, the differential of big shaft and little shaft determined by this gearratio to gear pair; 17-is dried tube inner chamber, and the flight (being used for the oven dry of aggregate) of putting forward material usefulness is housed; The new aggregate inlet of 18-; The mixing direction of the large and small agitating axle leaf slurry of 19-; The differential stirring area of 20-; The angle α of connecting line plane, the large and small shaft of 21-axle center and horizontal plane; The idler pulley of 22-oven dry tube; The supporting of the little shaft of 23-.
The specific embodiment
Provide embodiments of the invention below in conjunction with accompanying drawing:
A kind of differential double-horizontal-shaft asphalt regeneration stirrer, comprise two shaft and supportings thereof that the paddle oar is housed, burner, shell, drive motors, reduction box, gear pair and frame, it is characterized in that described two its diameters of shaft are inequality, wherein a shaft adopts cylindrical arrangement, in the tube flight is housed, outer wall is equipped with the paddle oar, one end is equipped with the big shaft of the oven dry tube of burner as mixer, there is rolling ring at big shaft two ends, support by idler pulley, the shaft that another root is equipped with the leaf oar is the little shaft of mixer, row's number of the leaf oar of big shaft is more than row's number of little agitating axle leaf oar, will be big, the ratio of the leaf oar row number of little shaft is defined as differential ratio, according to greatly, the diameter of two groups of paddle oars of little shaft is also reserved the gap of leaf oar and liner plate, is equipped with the shell of the mixer of a respective shapes.Be described in detail as follows:
(1), differential ratio:
The leaf oar row number ratio of the large and small shaft of present embodiment equals 4 for " differential ratio ", leaf oar 4 rows of little shaft, big agitating axle leaf oar 16 rows.The leaf oar of little shaft is arranged in the centre (shown in the accompanying drawing 34,5,13,14) of big shaft two row's leaf oars;
Large and small shaft be to equal 4 gear pair by a pair of speed ratio by " differential ratio " to be driven, the rotating speed of little shaft is 4 times (shown in the accompanying drawing 1 16) of big agitator shaft speed.
(2), oven dry tube (big shaft):
The inside of the big shaft of present embodiment is an oven dry tube, and its structure is similar to the oven dry tube of common bituminous mixing plant.
The inclination angle of its axis and level is 4 degree (right-hand member--the feed end of new aggregate is high-end, and left end-burner end is a low side), when the oven dry tube rotates, aggregate in the oven dry tube is kicked up by flight, fall again, make helical flow so repeatedly, the flow direction of aggregate is a helix from right to left.Oven dry tube left side is provided with burner, and flame from left to right with the reverse convection current of aggregate, makes aggregate heating, dehydration, overheated.
The paddle oar of the big shaft of this example is installed in the outer wall of oven dry tube.Along the circumferential direction uniform 16 row's leaf oars, 16 of every rows, at the stagger width of a leaf oar of axis direction, the leaf oar is 20 degree with respect to the established angle of axis between adjacent two rows.
(3), little shaft:
The along the circumferential direction uniform 4 row's leaf oars of the paddle oar of the little shaft of this example, 16 of every rows at the stagger width of a leaf oar of axis direction, make that the leaf oar with macro-axis can not produce interference between adjacent two rows.The leaf oar is 20 degree with respect to the established angle of axis, and this angle is opposite with the peace veer of big agitating axle leaf oar.
The direction of rotation of two shafts is outside in, rotate in opposite directions (as accompanying drawing 4 19 shown in), formed " differential stirring area ".
The material that is stirred is at large and small shaft separately under the promotion of paddle oar, in " differential stirring area ", both the axis direction along two shafts advanced, strengthened especially again they between two shafts laterally about the fierce degree stirred, increased the convective motion of material greatly.This patent mixing quality of the asphalt that " oven dry tube+differential double-horizontal-shaft mixer " stirred out of design like this improves greatly than " oven dry tube+single horizontal axis mixer " (being " twin-roll " of the U.S.).
(4), inclination angle with respect to the horizontal plane, the plane of two shafts:
The large and small shaft of this example is not on same horizontal plane.The plane of the center line by large and small two shafts, become skewed with horizontal plane, this angle of inclination is 30 ° (shown in the accompanying drawing 3 21), so that the paddle oar is when stirring material, material is under the double action of deadweight and mixing power, vertically also produce very rational upper and lower convective motion, the material that is stirred can be remained in the effective range of mixing efficiency best " differential stirring area " all the time, thereby improving the mixed effect of material once more.
(5), the shell of differential double-horizontal-shaft mixer:
According to the diameter and the gap of reserving leaf oar and liner plate of large and small two groups of paddle oars, the shell (shown among the accompanying drawing 1-4 15) of the mixer of a special shape of design.
Offer the charge door of various materials at the corresponding site of mixer shell.
The outside of shell coats insulation material again.
(6), supporting:
The rolling ring at oven dry tube (big shaft) two ends is by idler pulley supporting (shown in the accompanying drawing 1 22).
Little shaft also by the bearing block support at its two ends (as accompanying drawing 1 23 shown in).
The axis of large and small shaft is parallel to each other.
(7), add new aggregate:
New aggregate (cold conditions, synthetic by several specifications, pass through consecutive weighings respectively after) is delivered to the new aggregate charge door (shown in 18 among Fig. 1,2,4) on this machine the right from an aggregate charging belt machine (omitting the figure).
From new aggregate charge door, join in the oven dry tube (shown in 17 among Fig. 1,2,3,4).
(8), new aggregate oven dry operation (above-mentioned operation is 1.):
The axis and the horizontal plane of oven dry tube have a little inclination angle, are about 4 ° (not marking in the accompanying drawing), feed end (right-hand member among Fig. 1,2, the 4) height of new aggregate, and burner flame end (left end among Fig. 1,2,4) is low.
When the oven dry tube rotated, the aggregate in the oven dry tube was kicked up by flight, falls again, makes helical flow so repeatedly, and its direction is a helix (shown in 1 among Fig. 4) from right to left.
Oven dry tube left side is provided with burner, and flame from left to right with the reverse convection current of aggregate (shown in 9 among Fig. 1,2,4), makes new aggregate preheating, dehydration, heating again.
New aggregate is dried, and be heated to the temperature of regulation.For example the plain asphalt compound requires about 155 ~ 165 ℃ of aggregate temperature, modified asphalt mixture requires about 175 ~ 185 ℃ of aggregate temperature, if produce reclaimed asphalt mixture, looks old the ratio that material adds, 1. the bake out temperature of new aggregate can finish operation up to 180 ~ 230 ℃.
Dried the hot aggregate that is heated to predetermined temperature, the differential stirring area (shown in 20 among Fig. 3,4) outside the discharging opening (shown in 7 Fig. 2,3,4) of drying a left end is discharged to tube.
(9), the adding of old bitumen recovery material:
By the old bitumen recovery material (the old aggregate that has old pitch, cold conditions) that several specifications are formed, pass through consecutive weighings respectively after, deliver to the old material inlet (shown in 10 among Fig. 1,2,3,4) on this machine left side from another old material charging belt machine (omitting the figure),
The differential stirring area between the large and small shaft outside old material inlet directly joins the oven dry tube (shown in 20 among Fig. 3,4).
(10), the interpolation of pitch:
Pitch (liquid, heat) through behind the consecutive weighings, is delivered to the pitch inlet (shown in 11 among Fig. 1,2,4) on this machine left side.
Differential stirring area (shown in 20 Fig. 3,4) between the large and small shaft of pitch outside the porch is directly injected to the oven dry tube.
(11), the interpolation of breeze:
Breeze (cold conditions) through behind the consecutive weighings, is delivered to the breeze inlet (shown in 12 among Fig. 1,2,4) on this machine left side.
Breeze directly joins from entering the mouth the differential stirring area between the large and small shaft outside the oven dry tube (shown in 20 among Fig. 3,4).
(12), the structure of differential stirring area and mixture length (above-mentioned operation 2. and 3.):
Already heated aggregate is after oven dry tube is discharged to differential stirring area (shown in 20 Fig. 3,4) between the large and small shaft, and in differential stirring area, hot aggregate runs into the old bitumen recovery material that adds from charge door 10 after at first.
Because old bitumen recovery material is cold conditions, hot aggregate and old bitumen recovery material after differential stirring area is met, under the stirring of paddle oar, mixing at the beginning of carrying out along the vertical and horizontal of shaft.This process is that one " heat transfer " and " mass transfer " process-hot aggregate are with the old bitumen recovery material of heat transferred, another part heat that heats old bitumen recovery material is to be supplied with by the radiant heat of the barrel of oven dry tube, through stirring after a while, temperature new, old material reach unanimity gradually (diabatic process); After the temperature of old bitumen recovery material improved, the old pitch that attaches on old aggregate surface began to melt, and the old pitch of a part is wherein transferred to new hot aggregate surface (mass transport process).Because the heating to old bitumen recovery material is to carry out, overcome old pitch further wearing out in regenerative process under the condition that has completely cut off naked light.
After a while, under the stirring of the leaf oar of the big or small shaft of differential stirring area, new and old material runs into pitch and the breeze of adding differential stirring area subsequently again successively along the vertical and horizontal of shaft.
Continue to stir down at the leaf oar of large and small shaft, various materials are from left to right passed, are stirred, horizontal and vertical convective motion are arranged again, constantly carry out " mass transfer " and " heat transfer " process, temperature unanimity, each uniform component distribution up to the mixture of various materials, new pitch and old pitch interpenetrate and finish in " mass transfer " process between pitch, old pitch thereby obtained regeneration.
Compound has arrived the low order end (shown in 6 among Fig. 4) of differential stirring area at last, finished the regeneration of oven dry, heating and the old pitch of old bitumen recovery material, the mixing of new, old material etc. all operations 2. and 3., the right lower quadrant from differential stirring area is discharged to (shown in 3 Fig. 1,2,4) outside the machine at last.
(13), the decomposition of old pitch blue smoke and processing:
Material is in " heat transfer " of differential stirring area and " mass transfer is " in the process, small amount of moisture in the old bitumen recovery material is then evaporated by high temperature, add the blue smoke of old pitch evaporation, the combustion zone of the powerful negative pressure inspiration high temperature of the flame of the burned device of discharge gate of the oven dry tube by being positioned at differential stirring area left end, blue smoke is by high-temperature flame, with burnt gas, discharge by deduster from the right-hand member of oven dry tube.Thereby the design can stop the secondary pollution of the bitumen flue gas that produces in the asphalt heat recycling process.
Claims (6)
1, a kind of differential double-horizontal-shaft asphalt regeneration stirrer, comprise two shaft and supportings thereof that the paddle oar is housed, burner, shell, drive motors, reduction box, gear pair and frame, it is characterized in that described two its diameters of shaft are inequality, wherein a shaft adopts cylindrical arrangement, in the tube flight is housed, one end is equipped with burner and has constituted an oven dry tube, the outer wall of oven dry tube is equipped with the paddle oar, big shaft as mixer, there is rolling ring at big shaft two ends, support by idler pulley, the shaft that another root is equipped with the leaf oar is the little shaft of mixer, row's number of the leaf oar of big shaft is more than row's number of little agitating axle leaf oar, will be big, the ratio of the leaf oar row number of little shaft is defined as differential ratio, according to greatly, the diameter of two groups of paddle oars of little shaft is also reserved the gap of leaf oar and liner plate, is equipped with the shell of the mixer of a respective shapes.
2, a kind of differential double-horizontal-shaft asphalt regeneration stirrer according to claim 1, it is characterized in that described differential than its ratio be selected from 2,2.25,2.5,2.75,3,3.25,3.5,3.75,4,4.25,4.5,4.75,5 one of them.
3, a kind of differential double-horizontal-shaft asphalt regeneration stirrer according to claim 2 is characterized in that in the drive motors of described two shafts, and big shaft is selected differential than identical ratio with them for use to the speed ratio of little shaft.
4, a kind of differential double-horizontal-shaft asphalt regeneration stirrer according to claim 3, it is characterized in that large and small shaft rotates relative to ecto-entad, leaf oar on large and small two shafts is arranged and is staggered mutually, do not produce collision and interference during work, space between large and small two shafts has formed the differential stirring area of material.
5, a kind of differential double-horizontal-shaft asphalt regeneration stirrer according to claim 4 is characterized in that the plane and the horizontal plane of the center line by two shafts has slanted angle, and the value at this angle of inclination is between 10 to 40 degree.
6,, it is characterized in that the leaf oar of described large and small shaft stirs axial setting angle respectively and separately between 15 degree are spent to 50 according to the described a kind of differential double-horizontal-shaft asphalt regeneration stirrer of wantonly 1 claim in the claim 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101226132A CN100496686C (en) | 2007-07-09 | 2007-07-09 | Differential double-horizontal-shaft asphalt regeneration stirrer |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101226132A CN100496686C (en) | 2007-07-09 | 2007-07-09 | Differential double-horizontal-shaft asphalt regeneration stirrer |
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| CN101126221A CN101126221A (en) | 2008-02-20 |
| CN100496686C true CN100496686C (en) | 2009-06-10 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613986B (en) * | 2009-04-24 | 2011-04-20 | 河南高远公路养护设备股份有限公司 | Double shaft compulsory mixer of asphalt concrete regenerating and cold-mixing equipment |
| CN101691733B (en) * | 2009-08-27 | 2011-07-20 | 东盟营造工程有限公司 | Mixing and stirring method and device in construction of SBS modified stone mastic asphalt |
| CN102352594A (en) * | 2011-07-14 | 2012-02-15 | 无锡雪桃集团有限公司 | Aggregate drying cylinder with basket-type material driving device |
| CN103911936B (en) * | 2012-12-31 | 2016-05-25 | 无锡龙立工程机械有限公司 | A kind of asphalt heat recycling equipment |
| CN110700042A (en) * | 2019-11-07 | 2020-01-17 | 江苏集萃道路工程技术与装备研究所有限公司 | Collect stirs in continuous type regeneration cylinder of an organic whole in advance by force |
| CN110700043A (en) * | 2019-11-13 | 2020-01-17 | 江苏集萃道路工程技术与装备研究所有限公司 | Double-differential three-horizontal-shaft asphalt mixture stirring roller and road maintenance equipment |
| CN110904799A (en) * | 2019-12-03 | 2020-03-24 | 江苏集萃道路工程技术与装备研究所有限公司 | Differential double-horizontal-shaft asphalt mixture stirring roller and road maintenance equipment |
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| US5083870A (en) * | 1991-01-18 | 1992-01-28 | Sindelar Robert A | Asphalt plant with segmented drum and zonal heating |
| CN1452509A (en) * | 2000-05-05 | 2003-10-29 | 安曼加工股份公司 | Two-shaft compulsory mixer, Use of said mixer and method for operating same |
| JP2003126668A (en) * | 2001-10-24 | 2003-05-07 | Ishikawajima Constr Mach Co | Double-shaft kneador for viscous fluid |
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| CN101126221A (en) | 2008-02-20 |
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