JPH0734314Y2 - Paver heating dryer - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Field of Industrial Application) The present invention relates to a heating and dryer device for paving materials.

(Prior Art) Conventionally, as a means for reusing used paving materials such as asphalt mixture as a recycled material, there is, for example, a recycled type by heating, and this type by heating is input from a material inlet. The used paving material is heated to the shipping temperature by the hot air generation temperature by the burner and taken out from the material outlet.

(Problems to be solved by the invention) As described above, the used pavement material is heated to the shipping temperature by the hot air generation temperature, but the used pavement material is thrown into a finely cut state by, for example, a crusher device. Therefore, anything that comes into direct contact with the burner's flame will burn and cause blue smoke, which causes pollution. Further, since it is exposed to a high temperature, it is apt to deteriorate and its properties are significantly impaired. For this reason, for example, it is possible to increase the intake amount of the outside air and lower the hot air generation temperature for use, but in this case, the intake amount of the outside air increases the generated amount of the hot air, so that the large-sized Exhaust air is required, which may lead to cost increase and pollution such as noise.

Then, this invention aims at providing the heating dryer apparatus of the pavement material which solves the said problem.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in this invention, one of the drums rotatably supported has a material intake port and the other has a material intake port. Each of which is provided with an inner cylinder inside the drum which is the material outlet side, and between the inner cylinder and the drum, forms a passage through which the paving material introduced into the drum from the material inlet passes. A burner section for generating hot air is provided in the inner cylinder, and scooping blades for scooping up and dropping the material introduced from the material intake side are provided in the drum.

(Operation) According to such a pavement material heating dryer, the used pavement material taken in from the material intake port is heated by being blown with hot air while being inverted by the scooping blades and taken out as a recycled material from the material intake port. To be done. In this case, since the flame in the burner portion is surrounded by the inner cylinder, it does not come into direct contact with the flame even when passing through the passage, and blue smoke does not occur. Further, in the final step, conduction heat and radiant heat that are directly contacted with the inner cylinder when passing through the passage are given, so that a recycled material having stable properties can be obtained and the intake of outside air is reduced to lower the hot air generation temperature. It is possible to reduce driving noise.

(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings of FIGS. 1 to 6.

In the figure, 1 indicates a drum of the heating dryer device 3. The drum 1 is rotatably supported at both ends by rotating rollers 7, 7 provided on front and rear machine bases 5, 5. One of the rotary rollers 7 is a drive roller to which the rotational power of the drive motor 9 is transmitted through the mechanism 11 in principle, as shown in FIG.

The drum 1 is provided with a material intake port 13 on one side (on the right side in FIG. 1) and a material intake port 15 on the other side (on the left side in FIG. 1), and has a burner portion 17 on the side of the material intake port 15. Drum 1
Is inclined downward from the material take-out port 13 side toward the material take-out port 15 side, and the material is naturally flown down from the intake port 13 side toward the material take-out port 15 side by the rotation of the drum 1.

The material intake 13 is formed by a duct 19 fixedly supported by the machine base 5, and its tip end faces the inside of the drum 1 so as not to interfere with the rotating drum 1.

Further, in the drum 1, a first scooping blade 21, a second scooping blade 23, and a feeding blade 25 are arranged in this order from the burner portion 17 side.

The feed blade 25 has a shape inclined downward from the material intake 13 side to the second scooping blade 23 side on the inner peripheral surface of the drum 1, and forcibly feeds the material forward when the drum 1 rotates. Works like.

The second scooping blade 23 extends from the inner peripheral surface of the drum 1 toward the central portion, and the extension end is a bucket type bent upward, and as shown in FIG. It is set at a high position so that it will be almost directly above when the fall of is completed.

The first scooping blade 21 is shortened from the inner peripheral surface of the drum 1 toward the central portion thereof, and is set so that when the scooped material is completely dropped, as shown in FIG.

The burner section 17 has a double structure in which an inner cylinder 27 is provided in the drum 1, and a nozzle 29 for generating hot air faces the inner cylinder 27. Between the inner cylinder 27 and the inner peripheral surface of the drum 1, one is connected to the region of the first scooping blade 21 and the other is a passage 31 communicating with the material take-out port 15.
Conductive heat and radiant heat are given when passing through 31. In addition, the nozzle 29 is connected to and communicates with a combustion device for gas, oil, or the like (not shown) and has a low burner capacity. On the other hand, the exhaust duct 22 provided on the material outlet 19 side
In conjunction with the internal exhaust fan 29, the exhaust fan 26 is controlled in proportion to the hot air generation temperature by the nozzle 29.

That is, assuming that the burner temperature is constant, the hot air generation temperature depends on the intake amount of the outside air, but in this embodiment, a burner having a low burner capacity is used and an exhaust fan is used.
By keeping the rotation speed of 26 low, the intake of outside air is reduced and the hot air generation temperature is secured.

Reference numeral 35 denotes a heat insulating material, which is mounted on the entire outer peripheral surface of the drum 1 excluding the area of the feed blade 25 to prevent heat from escaping to the outside.

According to the heating dryer device 3 configured as described above, the used paving material fed from the material inlet 13 is fed by the feed blade 25.
Is sent to the front by the second scooping blade 23 and the first scooping blade 21, and when heated and heated by the hot air generated by the burner section 17 when it falls, the hot air that has finished its work is the exhaust fan. It is sent out by 26.

In this case, the material when falling falls across the hot air in the area of the second scooping blade 23, but since it is away from the burner portion 17, the hot air does not directly hit. Further, in the area of the first scooping blade 21, when it falls from the scooping blade 21, it does not traverse hot air as shown in FIG. Pass through passage 31. When passing through this passage 31, since it does not directly touch the burner flame, it does not burn and blue smoke does not occur. Further, the conductive heat and the radiant heat that come into direct contact with the inner cylinder 27 are given and taken out from the material take-out port 15. In this case, since heat is applied in the final process on the material take-out port 15 side, it is possible to use the burner section 17 having a low burner capacity and reduce the amount of outside air taken in to lower the hot air generation temperature. Also, the rotation speed of the exhaust fan is low, and the noise of the burner unit 17 and the noise on the exhaust fan 26 side can be reduced.

[Advantage of the Invention] As described above, according to the heating / drying device for paving material of the present invention, the recycled material does not come into direct contact with the flame due to the inner cylinder, so that the generation of blue smoke, which causes pollution, occurs. In addition, it is possible to prevent the deterioration and to obtain a recycled material with stable properties without deterioration. Further, since the conduction heat and the radiant heat are given by the passage in the final step, it becomes possible to lower the hot air generation temperature of the burner section, and the noise during operation can be suppressed to a low level.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of the heating dryer device of the present invention,
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is II in FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG. 1, and FIG. 6 is VI- in FIG.
It is a VI line cross section. 1 ... Drum 13 ... Material intake 15 ... Material intake 17 ... Burner part 21, 23 ... Scooping blade

Claims (1)

[Scope of utility model registration request] 1. A drum, which is rotatably supported, has a material inlet on one side and a material outlet on the other side, and an inner cylinder is provided inside the drum on the side of the material outlet to provide an inner cylinder and a drum. And a burner section for generating hot air is formed in the inner cylinder to form a passage through which the pavement material introduced into the drum from the material intake port passes, and the material intake side in the drum. A dryer for heating pavement material, which is equipped with scooping blades for scooping the material input from above and dropping it.