JPS6043482B2 - Solid asphalt dissolving method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for dissolving solid asphalt packed in drums.

Asphalt is widely used for road paving, waterproof coating, and application to concrete piles, but conventionally, to use asphalt in this way, solid asphalt in drum cans was used on-site. The method used is to open the can immediately before heating and melting. For example, you can open the top of the drum and heat it from the bottom to melt the asphalt inside the drum. Alternatively, if the scale is large, prepare a melting pot that can hold several drums and melt the asphalt inside the drum. A method is used in which a drum with its top plate opened is placed upside down in a melting pot and heated, and the solid asphalt in the drum is dissolved with the molten high-temperature asphalt liquid.
However, in any case, these methods have very poor dissolution efficiency because large chunks of solid asphalt are dissolved through the melted high-temperature asphalt.Moreover, in order to speed up the melting process, it is necessary to increase the asphalt liquid temperature. Although it is necessary to increase the temperature, doing so would make the work extremely dangerous, and it would also be difficult to control the temperature of the asphalt, resulting in defects that are undesirable from a quality control perspective.

Furthermore, in order to improve the dissolution efficiency of solid asphalt, solid asphalt is sometimes crushed and divided into pieces, but this not only requires a great deal of labor but also involves dangerous work. The present invention was made to solve the conventional problems as described above, and includes a drum heating furnace,
Using a device that integrates a melting tank and a combustion furnace vertically, the opened drum is placed into the drum heating furnace with the opening facing down, and the asphalt on the peripheral wall of the drum is softened by heating from the combustion furnace. After melting, the solid asphalt in the drum is separated and dropped into the melting tank below, and then heated and melted in a combustion furnace, which allows the solid asphalt to be efficiently melted, and the operation control is simple and work safety is ensured. is high, and the device is small and can be easily and inexpensively manufactured.
The present invention aims to provide a method for dissolving solid asphalt and an apparatus therefor.

Embodiments of the present invention will be specifically described below with reference to the drawings.

The drawing shows an example of the equipment used in carrying out the method of the present invention. First, this equipment will be explained. A is a drum heating furnace, below which is a melting tank B, and below that is a combustion furnace C. are integrated. In addition to being connected,
An oil storage tank D is provided horizontally adjacent to the melting tank B and the combustion furnace C.

The drum heating furnace A has a door 1 that can be opened and closed on one side, an exhaust port 2 on the ceiling, and an auxiliary burner 3 on the other side.
is installed.

And then... A rail 7 is installed on a partition plate 4 that separates the ram heating furnace A and the melting tank B, into which a trolley 6 carrying a drum can 5 filled with solid asphalt is carried.
The truck 6 has a structure in which a receiving ring 10 circumscribing the opening of the drum 5 is supported by several support rods 11 within a hollow underframe 9 having wheels 8 , 8 . Further, the partition plate 4 is provided with a hole having a diameter larger than that of the drum, into which the upper part of a heating cylinder 12 (described later) is fitted, and the exhaust hole 2 is further provided with an exhaust pipe 22 having a damper 21. . In the melting tank B, a large number of heating pipes 15, 15 were installed in a penetrating state between a pair of upper and lower support rings 13, 14, each having an inner diameter larger than that of the drum can 5, along the circumferential direction of the rings. A heating cylinder 12 is provided, and an upper support ring 13 is connected to the partition plate 4.
At the same time, the lower support ring 13 is fitted into an opening provided in the tank bottom 16 of the melting tank B, and the lower surface of the support ring 13 is arranged opposite to each heating pipe 15, 1-5. An opening/closing ring 18 provided with through holes 17, 17 can be rotated from outside the tank B via a lever 19, and by operating this ring 18, the heating tubes 15, 1 can be opened and closed.
The lower end of 5 can be opened/closed and the degree of opening can be adjusted.

A radial dissolving cut plate 20 is attached to the inner side of the heating tubes 15, 15 of the lower support ring 14. The combustion furnace C is provided with a main burner 23 on its front wall, and a number of smoke exhaust pipes 25 are attached to its rear wall 24 with one end thereof open.

Further, the oil storage tank D is separated from the combustion furnace C by a rear wall 24, and from the melting tank B by a partition wall 41, and communicated with each other through a flow passage 26 provided therein. The smoke exhaust pipes 25, 25 are horizontally installed at the bottom of the oil storage tank D, and the rear end of each smoke exhaust pipe 25, 25 is connected to a flue provided at the rear end of the oil storage tank D. A chimney 29 having a damper 28 is connected to the flue 27 . Furthermore, a feed pipe 30 that opens into the tank is attached to the rear end of the oil storage tank D, and an exhaust pipe 40 is also provided.
An on-off valve 31, a strainer 32, a pump 33, a pipe 34, a regulating valve 35, and a discharge pipe 36 are sequentially connected to the feed pipe 30, and a discharge nozzle 37 is connected to the discharge pipe 36 as necessary.
will be provided.

Further, a return pipe 39 having a regulating valve 38 is connected to the pipe 34, and the end thereof is opened into the upper part of the oil storage tank D. Note that the rails 7, 7 in the heating furnace A are provided extending to the upper surface of the oil storage tank D, so that the trolley 6 can be carried into and out of the heating furnace A.

The present invention is implemented using an apparatus such as that described above. first,
In the drum heating furnace A, with the door 1 open, one end of the drum filled with solid asphalt is opened on the trolley 6 pulled out to the rail 7 on the upper surface of the oil storage tank D, and the drum is placed with the opening facing down. In this state, the cart is carried into the heating furnace A, and the door 1 is closed.

Next, the auxiliary burner 3 is ignited to start combustion. In this case, the damper 21 is closed, the damper 28 of the chimney 29 is left open, and the opening/closing ring 18 is rotated so that the heating pipe 1
5 and the through hole 17 are aligned. By igniting the auxiliary burner 3 and the main burner 23, the combustion gas fills the heating furnace A, heats the outer periphery of the drum 5, and heats the heating tubes 15, 15.
, the combustion furnace C1 is discharged into the atmosphere from the chimney 29 through the flue pipes 25, 25.

When the outer periphery of the drum 5 is heated, the outer periphery of the solid asphalt inside the drum 5 is also heated, and when the temperature reaches approximately 90°C, the outer periphery becomes molten and the solid asphalt inside the drum 5 is heated.
The solid asphalt inside falls onto the radial melting cut plate 20 of the melting tank B below due to its own weight. Next, the auxiliary burner 3 is stopped, the main burner 23 is ignited, and the damper 21 is opened and the damper 28 is closed. Melting cut plate 20 and heating tube 1
5 is heated by the combustion gas from the main burner 23, the fallen solid asphalt is absorbed by the interaction between the biting action of the radially formed melting cut plates 20 and the heating action of the wide heat transfer surface. As a result, the melting progresses rapidly from the lower end, and the heat from the many heating tubes 15, 15 close to the outer periphery of the solid asphalt promotes the melting from the outer periphery as well. It will dissolve rapidly.

Then, the melted asphalt accumulates in the melting tank B, and if the solid asphalt continues to fall into the melting tank B by the heating furnace A, the liquid level of the melted asphalt in the melting tank B rises, and the oil is stored from the flow path 26. It flows into tank D. When the asphalt is sufficiently melted in the melting tank B, the opening/closing ring 18 is rotated to close the lower end of the heating pipe 15 and the chimney 29 is closed.
damper 28 is opened.

As a result, the combustion gas from the combustion furnace C passes through the flue pipe 25 and is discharged into the atmosphere from the chimney 29. Therefore, the melted asphalt that has entered the oil storage tank D is maintained in a molten state by heating from the smoke exhaust pipe 25. Furthermore, even though the asphalt in the melting tank B is no longer heated by the heating tube 15, the melting notch plate 20 is heated, so the high temperature molten state is maintained by the heat. If solid asphalt falls from the drum 5,
The combustion of the auxiliary burner 3 is stopped, the door 1 is opened, the trolley 6 is carried out onto the oil storage tank D, a new drum can is placed on it, the carriage 6 is carried into the heating furnace A again, the auxiliary burner 3 is ignited, and the drum 5 is removed.
The solid asphalt inside the can is dropped into the melting furnace B by heating the surrounding surface of the can.

In this case, the fallen solid asphalt is heated and melted through the molten asphalt in the melting furnace B. When the on-off valve 31 is opened and the pump 33 is driven, the dissolved asphalt in the oil storage tank D flows out from the discharge pipe 36 via the regulating valve 35 and is used.

The amount used is adjusted by operating the regulating valves 35 and 38. Surplus asphalt when the amount used is small is returned to the oil storage tank D via the return pipe 39. FIG. 2 is a schematic diagram showing the use of the present invention for surface treatment of foundation piles, in which a discharge nozzle 37 is attached to the end of a discharge pipe 36,
The pile 42 is placed on the receiving rollers 43, 43 and rotated in the direction of the arrow, while dispensing the melted asphalt from the discharge nozzle 37.

The device of the present invention is characterized by being portable, such as being mounted on a vehicle, but it may of course be stationary in a factory.

As explained above, the present invention provides a drum heating furnace, a melting tank, and a combustion furnace that are vertically integrated, an oil storage tank is provided adjacent to the melting tank and the combustion furnace, and the outer periphery of the solid asphalt in the drum is In the melting tank, the solid asphalt is melted by indirect heating from a combustion furnace and flows into an oil storage tank, where it is heated by the combustion furnace and used. Since the asphalt is maintained in the required molten state, solid asphalt can be melted easily and efficiently, the work is highly safe, and the equipment is simple, compact, and inexpensive to manufacture. It has many excellent effects.

[Brief explanation of the drawing]

The drawings show an example of an apparatus for carrying out the method of the present invention; FIG. 1 is a schematic diagram, FIG. 2 is a schematic diagram showing an example of the use of the present invention, FIG. 3 is a side sectional view of the apparatus, and FIG. 4 is a cross-sectional view taken along the line E-II in FIG. 3, and FIG. 5 is a cross-sectional view taken along the Ro-ro line in FIG. 3.

Claims (1)

[Scope of Claims] 1. A drum heating furnace, a melting tank, and a combustion furnace are provided in a vertically integrated manner, and a drum filled with solid asphalt is housed in the drum heating furnace with its opening facing down. is heated from the surroundings to melt the asphalt on the inner peripheral wall of the drum, causing the solid asphalt to separate from the drum and fall onto the melting notch plate provided at the bottom of the melting tank. The asphalt is melted by heating the slab and heating from the outer periphery, and the melted asphalt is flowed into an oil storage tank with a heat source, and the asphalt used in the oil storage tank is maintained in a required melted state. Method for dissolving solid asphalt. 2. A melting tank is provided in communication with the lower side of the drum heating furnace, which houses drums filled with solid asphalt and has heating means, to store the solid asphalt that has separated from the drum and fallen. A heating pipe is provided surrounding the solid asphalt, and a melting notch plate is provided to catch the solid asphalt that has fallen to the bottom of the tank. A combustion furnace for sending combustion gas into the heating tube is provided, and an oil storage tank having heating means from the combustion furnace is provided adjacent to the melting tank and the combustion furnace, and a melted asphalt is placed between the melting tank and the oil storage tank. A solid asphalt melting device, characterized in that a flow path is provided, and an oil storage tank is provided with means for feeding the melted asphalt to the outside of the machine.