JP3663226B2 - Asphalt pavement waste recycling dryer - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a dryer for regenerating asphalt pavement waste that heats and regenerates road pavement waste.
[0002]
[Prior art]
Asphalt pavement waste material (hereinafter referred to as “waste material”) excavated by road construction, etc., a dryer with almost the same structure as a new aggregate heating dryer in an asphalt plant is used. This regenerative dryer supports the cylindrical drum so that it can rotate freely, and the hot air sent from the burner while rolling down the drum while scraping the waste material with a number of scraping blades installed around the inner periphery of the drum The waste material is regenerated by heating to a desired temperature.
[0003]
In the heating and recycling of waste materials by this dryer, the waste material adheres to the waste material by melting asphalt adhering to the surface of the waste material while rolling down the drum while the waste material is heated. The scrap material gradually grows and grows on the inner surface of the scraper blade and the drum, and eventually the function of the scraper blade may be damaged.For example, a loose chain is attached to the scraper blade. It can also be seen that a movable scraping blade is used to prevent the adhesion by applying an impact to the scraping blade and the drum inner peripheral wall when the drum rotates.
[0004]
[Problems to be solved by the invention]
However, the adhesive strength of the waste material when the asphalt component melts and adheres is quite strong, and the impact by the chain etc. is often applied to a specific location, and adhesion deposition may occur at a location where it is not directly hit . Once it is deposited and deposited, it becomes difficult to peel off only with the impact force of the chain or the like.
[0005]
Therefore, in order to remove the attached and accumulated waste material, an operator enters a narrow drum and performs a shaving work, which has a problem in terms of maintenance.
[0006]
In view of the above, the present invention provides an asphalt pavement waste material recycling dryer that prevents waste material from adhering and accumulating in the drum as much as possible, and can easily remove the waste material from outside the drum even if adhering accumulation occurs. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, an asphalt pavement waste material recycling dryer according to claim 1 supports a cylindrical drum so as to rotate freely and supplies asphalt pavement waste material together with hot air from a burner into the drum. In the dryer for recycling asphalt pavement waste material that heats and regenerates the waste material, a drum wall that prevents the deposition of the waste material on the inner wall of the drum by heating and heating the drum wall along the circumferential direction on the outer peripheral wall of the drum the heater well as circumferentially, to circumferentially provided a feed line for supplying power so as to surround the drum wall heater is fixed to the drum, connected by conductors to a feeding path and the drum wall heater and, wherein the feed path proximal to the contact with the feed line of one to arrange the feeder that supplies power while sliding, of the drum wall heating the peripheral portion of the surface temperature and the drum heater It is characterized by comprising a power controller for performing intermittent or temperature control of the power to the drum wall heater based on time.
[0008]
Further, the asphalt pavement waste recycling dryer according to claim 2 supports the cylindrical drum so as to rotate freely, supplies the asphalt pavement waste with hot air from the burner into the drum, and heats and regenerates the waste. In the drying dryer, a drum wall heating heater is provided around the outer peripheral wall of the drum to heat and heat the drum wall along the circumferential direction to prevent the waste material from being deposited on the inner wall of the drum. while the feed line for the power supply so as to surround the wall heater circumference to set, in the drum wall heater disposing the collector to collect the power while sliding in contact with the feed line and further comprising a power controller for performing intermittent or temperature control of the power to the drum wall heater based on the temperature of the drum wall heating the inner periphery of the surface temperature and the drum portion of the heater To have.
[0009]
[Action]
According to the asphalt pavement waste material recycling dryer according to claim 1 of the present invention, the outer periphery of the drum 2 is rotated while the drum 2 is rotated by supplying electric power through a power feeder to the power supply path provided along the outer peripheral wall of the drum. The drum 2 can be heated by an electric heater provided along the wall, thereby heating the waste material to be deposited and deposited, further melting the asphalt component, reducing its viscosity, and weakening the adhesive force of the waste material. This prevents the accumulation of deposits and raises the drum wall temperature to make it difficult for the asphalt to adhere to the drum.
[0010]
Further, according to the asphalt pavement waste material recycling dryer according to claim 2 of the present invention, electric power is supplied through a current collector disposed in the heater for heating by supplying electric power to a power supply path provided around the outer peripheral wall of the drum. Electricity can be supplied to the heater, the drum peripheral wall can be heated while rotating the drum, and the waste material to be deposited and deposited is heated in the same manner as described above to further melt the asphalt component and to reduce its viscosity. Reduces the adhesive strength of the waste material to prevent adhesion and accumulation.
[0011]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
Reference numeral 1 denotes a waste material recycling dryer that heats and recycles waste material, and a cylindrical drum 2 is rotatably supported by a support roller 4 on a machine base 3 and rotated at a predetermined speed by a driving device (not shown). I am letting.
[0013]
Reference numeral 5 denotes a hot air generating burner disposed below the drum 2, and a combustion chamber 6 for forming a flame is disposed in front of the burner 5. A hot-air passage 7 is connected to the combustion chamber 6, and the hot-air passage 7 rises upward, and a hot hopper 8 disposed at one end of the drum 2 is opened at its tip, and is generated by the burner 5. The hot air is sent into the drum 2.
[0014]
The hot air that has passed through the drum 2 is led out from an exhaust flue 10 connected to a cold hopper 9 disposed at the other end of the drum 2, and an exhaust fan (not shown) disposed at the end of the exhaust flue 10. As a result, the exhaust gas is sucked in to maintain the gas flow passing through the drum 2, and the exhaust gas derived from the drum 2 passes through a dust collector (not shown) disposed downstream of the drum 2 and is released to the atmosphere.
[0015]
Reference numeral 11 denotes a waste material input chute for introducing waste material into the drum 2. The waste material input to the drum 2 from the waste material input chute 11 is hot air passing through the drum 2 while rolling down the drum 2. They are brought into contact with each other, heated to a desired temperature, and discharged from a waste material discharge port 12 below the cold hopper 9.
[0016]
13 is an electric heater for heating, which is wound around the drum outer wall near the check blade on the material input side of the drum 2 in the circumferential direction, and heat is dissipated outside the drum 2 during heating. In order to prevent, it is covered with a heat insulating material 14.
[0017]
The material input side of the drum 2 shows an example in which an electric heater is attached to this region in order to hinder the supply of the material when the waste material adheres and accumulates. In addition to this region, the attachment position may be suitably attached to a position where waste materials are likely to adhere.
[0018]
Around the electric heater 13, a trolley wire 15 as a power supply path is provided so as to surround the electric heater 13, and the trolley wire 15 is formed into a ring shape by forming a copper rod or the like as an electric conductor in an annular shape. It is attached with a conductive insulator 16. The electric heater 13 and the trolley wire 15 are connected by an electric wire as a conductor.
[0019]
The trolley wire 15 is provided with a power supply trolley 17 that is a power supply body. The power supply trolley 17 is in contact with the trolley wire 15 and slides to supply power while sliding. The power supply arm 19 is configured to be swingable so as to be brought into contact with the trolley wire 15 with an appropriate force, and a power supply line 20 connected to a power source is connected to the sliding portion 18. The electric power sent from the sliding portion 18 is sent to the electric heater 13 via the trolley wire 15.
[0020]
Reference numeral 21 denotes a power controller for intermittently supplying power interposed in the power supply line 20, for example, intermittently supplying power to the electric heater 13 based on the surface temperature of the peripheral portion of the electric heater 13, the temperature in the drum, or the like. And temperature control.
[0021]
FIG. 3 shows another embodiment of the present invention. A trolley wire 15 'as a power supply path is provided around the electric heater 13' so as to surround the electric heater 13 '. The wire 15 ′ is formed by annularly forming a copper rod or the like as a conductor, and provided with a power line connecting terminal for connecting an end of the power line connected to the power source at an appropriate position.
[0022]
Further, the electric heater 13 'is provided with a current collecting trolley 22 which is a current collector for taking in electric power to the electric heater 13'. The current collecting trolley 22 is in contact with the trolley wire 15 'at one end. The sliding portion 23 that takes in electric power while sliding, and a current collecting arm 24 that can be swung to bring the sliding portion 23 into contact with the trolley wire 15 ′ with an appropriate force. The electric power is connected by an electric wire which is an electric conductor attached between the sliding portion 23 and the electric heater 13 '. The trolley wire 15 'is connected to a power supply line 20' connected to a power source. In addition, a power controller 21 'that performs intermittent power and temperature control is interposed in the power supply line 20'.
[0023]
Therefore, when the waste material is heated and regenerated by the waste material regenerating dryer 1, the drum 2 is rotated and hot air is sent into the drum 2 by the burner 5, and the power controller 21 is operated to energize the power supply trolley 17. A trolley wire 15 disposed on the outer periphery of the drum 2 is in contact with the power supply trolley 17 and rotates, and power is supplied to the trolley wire 15 through the power supply trolley 17. When electric power is supplied to the trolley wire 15, electric power is supplied to the electric heater 13 connected thereto, and the drum 2 is heated from the outer peripheral wall.
[0024]
Next, when the supply of the waste material is started in the drum 2, the waste material is in contact with the hot air passing through the drum 2 while rolling down in the drum 2 while being scraped up by the scraping blades in the drum 2. The temperature is raised to a temperature.
[0025]
Then, as the waste material is supplied into the drum 2, the asphalt content in the waste material starts to melt in the vicinity of the material input portion, and the adhesive strength of the asphalt content becomes considerably strong. Then, although it is attempted to adhere and accumulate at the check blade portion, such a region is heated by the electric heater 13 in advance, so that the attachment of the waste material can be prevented as much as possible.
[0026]
Normally, the electric heater 13 is operated without being energized, and when the waste material adheres to the scraping blades, etc., the electric heater 13 is energized to heat the adhering portion to melt the asphalt content of the adhering waste material. And may be peeled off from the scraping blade.
[0027]
In the other embodiment of the present invention shown in FIG. 3, the power controller 21 'is operated to first energize the trolley wire 15'. A current collecting trolley 22 rotates in contact with the trolley wire 15 ′, and power is collected from the trolley wire 15 ′ by the current collecting trolley 22. Then, the electric power collected by the current collecting trolley 22 is supplied to the electric heater 13 'to heat the drum 2 from the outer peripheral wall side of the drum 2, thereby preventing the attachment of waste materials as much as possible.
[0028]
【The invention's effect】
As described above, in the dryer for recycling asphalt pavement waste according to claim 1 according to the present invention, the electric heater 13 for heating the drum wall is provided around the outer peripheral wall of the drum 2, and the electric heater 13 is provided around the electric heater 13. A trolley wire 15 serving as a power feeding path is provided around and fixed to a drum, the electric heater 13 and the trolley wire 15 are connected by a conductor, and a power feeding trolley 17 serving as a power feeding body that supplies power to the trolley wire 15 is slid. On the other hand, the drum wall is provided with a power controller 21 that performs intermittent power control and temperature control on the electric heater 13 based on the surface temperature of the peripheral portion of the electric heater 13 and the temperature in the drum 2. It is possible to raise the temperature by appropriately heating and prevent the waste material from adhering to the drum inner peripheral surface as much as possible.
[0029]
In the dryer for recycling asphalt pavement waste according to claim 2 according to the present invention, an electric heater 13 ′ for heating the drum wall is provided around the outer peripheral wall of the drum 2 along the circumferential direction. A trolley wire 15 ′ that is a power supply path is provided around 13 ′, and a current collecting trolley 22 that is a current collector is provided on the electric heater 13 ′, while the surface of the peripheral portion of the electric heater 13 ′ is provided. Since the electric power controller 21 'is provided for intermittently controlling the electric power to the electric heater 13' and controlling the temperature based on the temperature and the temperature in the drum 2, the temperature can be raised by appropriately heating the drum wall to the inner peripheral surface of the drum. It is possible to prevent waste materials from sticking as much as possible.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a dryer according to the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a view corresponding to FIG. 2 showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Waste material reproduction | regeneration dryer 2 ... Drum 13, 13 '... (For heating) Electric heater 15, 15' ... Trolley wire (feeding path)
17 ... Feeding trolley (feeding body)
22 ... Current collector trolley (current collector)

Claims (2)

In a dryer for asphalt pavement waste recycling, in which a cylindrical drum is rotatably supported and supplied with hot air from a burner into the drum, and the waste is heated and regenerated, the outer peripheral wall of the drum is circumferentially A drum wall heating heater that prevents the accumulation of waste materials on the drum inner wall by heating and heating the drum wall along the circumference of the drum wall is provided, and a power supply path for supplying power so as to surround the drum wall heating heater The drum wall heating heater and the power supply path are connected by an electric conductor, and a power supply body that supplies power while sliding in contact with the power supply path in the vicinity of the power supply path. while disposed, further comprising a power controller for performing intermittent or temperature control of the power to the drum wall heater based on the temperature of the drum wall heating the inner periphery of the surface temperature and the drum portion of the heater Asphalt paving waste Play for dryer and butterflies. In a dryer for asphalt pavement waste recycling, in which a cylindrical drum is rotatably supported and supplied with hot air from a burner into the drum, and the waste is heated and regenerated, the outer peripheral wall of the drum is circumferentially A drum wall heating heater that prevents the accumulation of waste materials on the drum inner wall by heating and heating the drum wall along the circumference of the drum wall is provided, and a power supply path for supplying power so as to surround the drum wall heating heater The drum wall heating heater is provided with a current collector that collects electric power while sliding in contact with the power supply path, while the surface temperature of the peripheral portion of the drum wall heating heater is arranged. An asphalt pavement waste material recycling dryer comprising a power controller for intermittently controlling the temperature of the heater for heating the drum wall and controlling the temperature based on the temperature inside the drum .

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