JPS6215284Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for producing recycled composite material using waste material from bituminous pavement laid as road paving material.

Asphalt pavement, which is widely used in general, is made by heating and mixing asphalt with aggregate prepared by adjusting coarse aggregate, fine aggregate, filler, etc. to create an asphalt mixture, which is then spread under high temperature and rolled using a roller. It is laid by means of compaction. Therefore, when repairing the ruts that occur on the above-mentioned pavement surface, performing water and sewage road construction, and resurfacing due to aging, a large amount of previously installed bituminous pavement is removed due to the installation of new paving material. It turns out.

Traditionally, bituminous pavement waste has been disposed of as industrial waste, but the reuse of this waste has started to attract attention from the standpoint of pollution control and resource conservation. The above-mentioned waste materials are crushed using Jio crusher as primary crushing.
An impact crusher was used for secondary crushing. For this reason, the coarse aggregate contained in the waste material itself is divided into small pieces to produce a large amount of fine dust, and the particle size varies, making it impossible to obtain a high-quality recycled material, and requiring the addition of asphalt or the like during recycling. Furthermore, since the impact crusher described above crushes the material without passing through a sieve, there is a problem in that it requires multiple sieving operations to obtain a desired particle size, resulting in high costs.

In addition, since regeneration is carried out by heat exchange method,
When producing recycled composite material by adding bituminous pavement waste to aggregate heated in a mixer, heating and mixing the bituminous material, the amount of water mixed in the above bituminous pavement waste is reduced. The problem was that the gas instantly vaporized and turned into gas containing a large amount of moisture and dust, which not only polluted the working environment but also spread to nearby areas as a source of pollution.

This idea was made to solve the above problems, and its purpose is to crush coarse particles in bituminous pavement waste by using a coal granulator equipped with a sieve plate. In addition to easily obtaining waste materials with a good grain size, the gas generated in the mixer is forcibly removed by installing an exhaust duct between the mixer and the exhaust fan, thereby preventing pollution of the working environment. It is an object of the present invention to provide an apparatus that can efficiently produce recycled composite material by preventing pollution and reliably suppressing sources of pollution that affect neighboring areas.

Hereinafter, while explaining an outline of an example of an asphalt plant for producing recycled composite material using the flow sheet shown in FIG. 1, additional equipment of this device shown in FIGS. 2 and subsequent figures will be explained.

In Figure 1, bituminous pavement waste brought in by vehicles such as trucks is transported to storage tank 2 and conveyor 3.
The material is sent to the Jyo crusher 4 through the machine to be crushed. Further, the coarse particles in the waste material are crushed using the coal granulator 5 of this device.

The coal granulator 5 is constructed as follows. That is, as shown in Fig. 2, a casing 5a formed as a hollow body of a substantially rectangular cube with an open bottom has an inlet 5b formed at the top of one side for feeding coarse particles Co of waste bituminous pavement material. At a position approximately midway through the height of the casing 5a, which is on an extension of the center of the inlet 5b, a long main shaft 5c having a large diameter at its middle part and successively smaller diameters at its left and right parts, is inserted rotatably through both side surfaces of the casing 5a in the horizontal direction. A number of identical disks 5e having a number of axial holes at intervals on the same radial line of the face plate for inserting a fulcrum shaft 5f are inserted on the large diameter shaft part of the main shaft 5c inside the casing, and the adjacent disks 5e are inserted in the large diameter shaft part.
A rotating cylinder 5d is fitted onto the shaft between them and is clamped by tightening nuts (not shown) on both sides so that the rotating cylinder 5d is rotatable together with the main shaft 5c.

A small-diameter fulcrum shaft 5f is integrally inserted between each of the shaft holes of the two adjacent disc bodies 5e as described above. On the axis of each fulcrum shaft 5f between the two disc bodies 5e, a hammer cylinder 5g has peaks and troughs similar to the teeth of a spur gear formed at equal intervals on its circumferential surface.
is inserted. In this case, each hammer cylinder 5g
are provided at every fulcrum shaft 5f on the circumference as shown in FIG. 2 when viewed in cross section of the main shaft 5c, and the hammer cylinders 5g are attached to different fulcrum shafts 5f on both sides of each disc body 5e. provided. Therefore, when viewed in the axial direction of the main shaft 5c, the hammer cylinders 5g are provided at intervals between the adjacent disc bodies 5e.

Next, support pins 5k are fixedly inserted between the both side wall surfaces of the casing 5a, which is located directly below one side of the input port 5b. The crushing frame 5h is made up of a flat collision plate on the side and a sieve plate 5p with many particle size measurement holes on the perfectly circular arcuate surface on the lower side. By fitting, the sieve plate 5p is housed in a manner concentric with the main shaft 5c. Further, the tip of a hanging rod 5n inserted from the outside of one side of the casing 5a is connected to the lower end of the crushing frame 5h, and by external operation of this rod 5n, the crushing frame 5n is moved to the supporting pin 5k. It is configured to move directly below the fulcrum.
Alternatively, a part of the free end side of the crushing frame 5h may be divided and this divided portion may be fixed to the casing 5a, and only the remaining crushing frame 5h may be configured to be swing-adjustable around the support pin 5k. good. ring hammer 5g
When the swingable crushing frame 5h is worn out, the gap between the ring hammer 5g and the crushing frame 5h is adjusted by operating the hanging rod 5n. Furthermore, on the other side of the casing 5a, a shelf-like receiving plate 5r is provided on the wall near where the tip of the crushing frame 5h is located.
is installed and arranged so that it is possible to collect and receive roadside impurities mixed in with the waste materials. The impurity disposal box 5t is attached to an external position of the casing 5a on this side so as to communicate with the receiving plate 5r through the discharge port 5s.

When this coal granulator 5 is used, coarse particles of bituminous pavement waste can be crushed to an optimal particle size. That is, when coarse particles Co are introduced into the casing 5a from the inlet 5b, the introduced coarse particles Co are hit powerfully by each hammer cylinder 5g between the disk bodies 5e rotating at high speed in one direction below. As a result, it is strongly slammed against the upper collision plate of the crushing frame 5h, and is roughly crushed. Next, the processed material roughly crushed in the above manner is this hammer cylinder 5g and the sieve plate 5.
It is sheared between p and ground, and is crushed into fine pieces by the compressive action of both. In this case, impurities such as nails, screws, nuts, bottle crowns, coins, etc. that are mixed in the processed material are blown away by centrifugal force during rotation, and their rotational trajectory is directed toward the open removal port 5s. When the particles are scattered, an inclined receiving plate 5r is placed at this position and the particles are automatically dumped into the waste box 5t. Therefore, the sieve plate 5
Only high-quality particles whose particle size is selected to be smaller than the mesh size of p are discharged downwardly to the outside from the sieve plate 5p. Moreover, the bituminous pavement waste crushed by the coal granulator in this way is not subjected to strong breaking force, so the crushed stone itself is not crushed but is divided by the bituminous parts, Since no crushed stone is exposed in the crushed waste material, it is possible to obtain waste materials with a good particle size.

The waste material crushed by the above-mentioned geo crusher 4 and coal granulator 5 is sieved into particles of different particle sizes through sieves 6 and 7, and sequentially sent to a waste material bin 8. Note that not all of the particle sizes of the waste material are used, but only waste material that is suitable for use, for example, sieved waste material with a diameter of 0 to 13 mm, may be used. 9 is an aggregate bin for storing new aggregates, which are classified into crushed stone, sand, screenings, etc. After the selected aggregate or mixed aggregate is dried by a dryer 10, it is transported upward using a bucket conveyor installed in a hot elevator 11 and supplied to a vibrating screen 12. In this case, the moisture or dust generated in the dryer 10 is sent to the dry cyclone 14 through the duct 13, passed through the flue 15, the NO1 exhaust fan 16, and the flue 17, and then sent to the bag filter 18, where it is made pollution-free. The gas is discharged through the flue 19, NO2 exhaust fan 20, and chimney 21. Note that a so-called wet dust collector or the like may be used instead of the bag filter 18. It is also possible to operate the NO2 exhaust fan 20 by changing its performance. Furthermore, separately prepared stone powder elevator 2
The stone powder is transported upward using a bucket conveyor installed in the stone powder bin 23, and temporarily stored in the stone powder bin 23.
Due to the above, waste material bin 8, stone powder bin 23, vibrating sieve 1
Although the waste material bin 8 is disposed above, a waste material elevator (not shown) may be installed to supply waste material to the waste material bin 8, or a conveyor system may be used to raise and feed the waste material as will be described later. The aggregates thus sieved by the vibrating sieve 12 are sorted according to particle size by the hot bin 24, and sequentially introduced into the aggregate measuring tank 25. At the same time, the waste material stored in the waste material bin 8 is also introduced into the aggregate measuring tank 25, but the order in which it is introduced is to change the particle size of the aggregate to "large", "medium", "small", "sand", etc. ” As shown in Figure 3, first put “large” in part A, then put “medium” in part B, “waste” in part C, “small” in part D, and put “small” in part E. Place "sand" on the part.

In this way, the asphalt waste material C is sandwiched between the aggregates in a sandwich-like manner.
Note that an asphalt measuring tank 26 and a stone powder measuring tank 27 are arranged adjacent to the aggregate measuring tank 25, and measure predetermined amounts of asphalt and stone powder, respectively.

The aggregate and bituminous pavement waste in the aggregate measuring tank 25 prepared as described above and the asphalt measuring tank 2
All of the asphalt in 6 and the stone powder in the stone powder measuring tank 27 are put into the mixer 28 and mixed by heating, but during this reaction, a large amount of water vapor,
The problem is that dust and blue smoking are generated, which leak into the surrounding area and become a source of pollution.

Accordingly, in the case of this invention, the exhaust duct led out from the mixer or measuring tank is connected to the dry cyclone or bag filter as an additional equipment to the above device, as shown in Fig. 4. Therefore, an example of how to install the exhaust duct will be shown below. That is, the fade covers 2 on both sides of the mixer between the mixer 28 and the aggregate measuring tank 25
Two outlet pipes 30 and 30 are provided from the bag filter 18 side, and exhaust ducts 31 and 33 are provided with a No. 3 exhaust fan 32 sandwiched between them to connect the two.
This exhaust duct 33 is divided into sections as appropriate.
By joining with flanges etc., it can be configured to any desired length. Further, automatic dampers 34, 34 which automatically open and close are attached to the inner lower part of the outlet pipe 30 to control the opening and closing thereof. 35 is a manual damper.

When operating the exhaust ducts 31 and 33, the following method is used. In other words, when aggregates, waste materials, asphalt, etc. put into the mixer react and dust containing gas, ducts, and water vapor is generated, the damper 34, which automatically opens and closes using air or electricity, is held in the "open" state for a certain period of time. At the same time, the No. 3 exhaust fan 32 is rotated to forcefully exhaust air to the bag filter 18 side. In this case, by providing the damper 34 with a timer that controls opening and closing, exhaust can be performed in conjunction with the No. 3 exhaust fan 32. Note that the No. 3 exhaust fan 32 has a shape that prevents dust from sticking and is highly efficient. Normally, 5 minutes after the mixer 28 starts the reaction.
Good results can be obtained by forcibly evacuation for about seconds and immediately closing. Further, since the bag filter or the manual damper 35 can be arbitrarily adjusted manually, the amount of exhaust air can be easily adjusted. Further, instead of this bag filter 18, a wet type dust collector may be used.

FIG. 5 shows an embodiment in which bituminous pavement waste is fed by a conveyor system. That is, as described above, the bituminous pavement waste crushed by a geocrusher or coal granulator is dropped from the input section 36 into the waste material hopper 39 via the storage tank 37 and the screw or belt feeder 38. The waste material is transported from below the waste material hopper 39 to the waste material bin 8 by the first belt conveyor 40 and the second belt conveyor 41. In this case, the configurations of the adjacent hot bin 24, aggregate measuring tank 25, mixer 28, etc. are the same as in the example shown in FIG. The waste material is put into the aggregate measuring tank 25. Note that the bituminous pavement waste supply mechanism is not limited to the above, and any means can be used.

This invention has the following various effects in use due to the above-mentioned structure. In other words, in addition to the conventional asphalt plant, coarse particles in bituminous pavement waste are crushed using a coal granulator using a hammer tube impact and shearing, grinding, and compression between the hammer tube and sieve plate. Therefore, the aggregates contained in the waste material separate from each other in the bituminous part that surrounds the aggregates, and the coarse aggregate in the waste material itself is not divided into small pieces, so particle size control is difficult when paving the old pavement. The resulting good particle size distribution can be directly reproduced in the recycled material, and since the surfaces of all aggregates in the recycled material are coated with asphalt, there is no risk of dust generation. Usually, by mixing about 30% of bituminous pavement waste into the new aggregate, the properties of the recycled composite material can be rather improved. Moreover, since the waste materials crushed in the coal granulator are passed through a sieve plate and only those having a selected particle size are discharged, it is possible to save on sieving in subsequent operations and reduce costs. In addition, a duct mechanism is installed to forcibly discharge the gas generated within the mixer, making it possible to effectively reuse bituminous pavement waste or road cutting waste, which previously had no other treatment option than simply discarding it. It can be carried out.

In addition, according to this invention, gas and moisture generated during the reaction in the mixer are forcibly exhausted for a specified period of time, so the water content ratio of the obtained recycled composite material,
It is possible to appropriately select various factors such as temperature, particle size, amount of asphalt mixed, etc., and it is also effective in that it is possible to easily set the material formulation and processing conditions that will obtain the desired composite properties.

[Brief explanation of the drawing]

Figure 1 is a flow sheet showing an example of an asphalt plant using bituminous pavement waste and a state in which the coal granulator of this device is interposed in the main part, and Figure 2 is a flow sheet showing the main part of this device. Fig. 3 is a cross-sectional view of a measuring tank showing the order in which the new aggregate and waste materials are introduced in this invention, and Fig. 4 is a cross-sectional view showing an example of installing an exhaust duct. FIG. 5 is a schematic front view showing an embodiment in which bituminous pavement waste is fed by a conveyor system. 1...Vehicle, 2...Storage tank, 3...Conveyor,
4... Diyoke crusher, 5... Coal granulator, 5a... Casing, 5b... Inlet, 5c... Main shaft, 5d... Rotating tube, 5e... Disc body, 5f... Fulcrum shaft, 5g……Hammer tube, 5
h...Crushing frame, 5k...Support pin, 5n...Hanging rod, 5p...Sieve plate, 5r...Receiving plate, 5
s...Exclusion port, 5t...Disposal box, 6,7...Sieve,
8... Waste material bin, 9... Aggregate bin, 10... Dryer, 11... Hot elevator, 12... Vibrating sieve, 13... Duct, 14... Dry cyclone, 15, 17, 19... Flue , 16...No.1 exhaust fan, 18...Bug filter, 20...No.2 exhaust fan, 21...Chimney, 22...Stone powder elevator,
23...Stone powder bottle, 24...Hot bottle, 25...
...Aggregate measuring tank, 26...Asphalt measuring tank, 2
7... Stone powder measuring tank, 28... Mixer, 29...
Fade cover, 30... Outlet pipe, 31, 33...
...exhaust duct, 32...No.3 exhaust fan, 34...automatic damper, 35...manual damper, 36...input section, 37...storage tank, 38...screw, 3
9...Waste material hopper, 40...First belt conveyor, 41...Second belt conveyor, 42...Belt feeder chute.

Claims (1)

[Scope of utility model registration request] As a means of crushing bituminous pavement waste mixed in the new aggregate and filler in any proportion to the bituminous material, a main shaft is rotatably passed through the casing, and hammer cylinders are installed at intervals on the main shaft. A disk body arranged in the casing is fitted so as to be integrally rotatable, and a crushing frame with a sieve plate is housed in the casing in such a manner that the sieve plate is arranged approximately concentrically with the main shaft. A coal granulator is disposed in conjunction with a geocrusher, and a measuring device for mixing the new aggregate, filler, and bituminous pavement waste in arbitrary proportions, and a portion below the measuring device. A method for manufacturing recycled composite material using bituminous pavement waste, comprising a measuring tank and a mixer located in the mixer, and an exhaust duct led out from the mixer, the exhaust duct being connected to a cyclone or a bag filter. Device.