JPS6338256Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dryer in an asphalt regeneration plant or the like that produces an asphalt heated mixture by heating and regenerating asphalt pavement waste.

Generally, a dryer in an asphalt regeneration plant heats and regenerates asphalt pavement waste crushed by a crusher or the like, and, for example, a dryer having a structure as shown in FIGS. 3 and 4 is known. The dryer A shown in FIGS. 3 and 4 includes a cylindrical furnace body 1, a burner 2 provided at one end of this furnace body 1, a discharge manifold 3 provided at the other end, and a cylindrical furnace body 1. It has an end portion provided with a burner 2 and charging casings 4, 5 provided in the center portion. The furnace body 1 has a plurality of inlets 6 and 7 formed at appropriate intervals in the circumferential direction in a portion surrounded by the inlet casings 4 and 5.
Furthermore, a scraper is provided at one side edge of the input ports 6 and 7 to guide asphalt pavement waste, etc., which is input from the input chute 8 that protrudes in the radial direction and is connected to the input casings 4 and 5, into the furnace main body 1. A blade 9 is provided inside the input port 7, and asphalt pavement waste, etc., which have been input into the furnace body 1, are returned to the input port 7.
A shielding member 10 is attached to prevent it from coming out. Furthermore, raking blades 11 are attached to the circumferential portion of the furnace body 1 in order to improve the heating of asphalt pavement waste material etc. introduced into the furnace body 1. In the dryer A configured as described above, new aggregate is input from the input port 6 and asphalt pavement waste is input from the input port 7 while rotating the furnace main body 1, and heated by combustion heating gas from the burner 2. Then, asphalt recycled composite material is obtained.

However, in the dryer A, a part of the asphalt pavement waste once introduced into the furnace body 1 comes out again from the input port 7, and the asphalt content in the asphalt pavement waste adheres to the lower part of the input casing 5 and cools down. At the same time, since it gradually increases due to the consolidation effect, it comes into contact with the raking blade 9 and prevents the rotation of the raking blade 9, and the raking blade 9
However, it has disadvantages such as wear and damage.

The purpose of this invention is to create an asphalt regeneration plant in which the asphalt content in asphalt pavement waste adheres, cools, presses, and increases, thereby causing no resistance to the rotation of the raking blades, or wear and tear of the raking blades. The purpose of the present invention is to provide a dryer for use in, etc.

This invention achieves the above object by projecting the lower part of the charging casing downward and filling this projecting part with powder.

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

The dryer B according to this invention has the same basic structure as the one shown in FIG. Burner 2 equipped with
, a discharge manifold 3 provided at an end located below the furnace body 1 , and charging casings 4 and 12 provided at the end and central portion of the furnace body 1 where the burner 2 is provided. That's what happens. The dryer B is different from the one shown in FIG. 1 in the structure of a charging casing 12 provided in the center of the furnace body 1 and into which asphalt pavement waste is charged. That is, as shown in FIG. 1, the charging casing 12 is formed with a lower portion projecting downward, and this projecting portion 12a is filled with powder 13 such as crushed stone or sand.

Next, the operation of the apparatus configured as described above will be explained.

First, when heating and regenerating asphalt pavement waste using this dryer B, the furnace body 1 is rotated, combustion heated gas is fed into the furnace body 1 by the burner 2, and new aggregate is introduced from the input port 6. ,
In addition, asphalt pavement waste is inputted from the input port 7, and is raked up by a raking blade 11 in order to mix and heat the new aggregate and asphalt pavement waste, and gradually moved to the discharge manifold 3 side while repeating falling. This is carried out by heating and drying using the above-mentioned combustion heating gas.

Here, the new aggregate and asphalt pavement waste that spilled from the furnace body 1 into the charging casing 12 during the above-mentioned heat regeneration process are thrown into the furnace body 1 again by the scraping blades 9, and the asphalt pavement waste is The asphalt contained in the powder particles 13 adheres to the protrusion 1 of the charging casing 12.
2a, or the scraping blade 9
It is then thrown into the furnace body 1 again.

The material of the powder 13 in the above embodiments is not particularly specified, but it is better to use the same material as the aggregate mixed with asphalt, even if it is mixed into the furnace body 1. This is advantageous because it does not cause any inconvenience, and the powder 13 on the protrusion 12a of the charging casing 12 is always kept at a constant amount using the same material. In addition, in the charging casing 12, the protruding part 12a is constructed separately, and the protruding part 12a is attached with a hinge 14 and fixed with a stopper 15 as shown by the two-dot chain line in FIG. When the dryer B is stopped, the powder 13 to which asphalt has adhered can be easily replaced.

As explained in detail above, according to this invention, in a dryer installed in a recycling plant, etc., the lower part of the input casing provided in the dryer is made to protrude downward, and this protruding part is filled with granular material. As a result, the asphalt contained in the asphalt pavement waste spilled from the furnace body adheres to the powder and granules, and as it remains in a floating state, it is susceptible to the rotation of the scraping blades provided at the inlet of the furnace body. resistance and wear of the raking blades,
No damage will occur. Therefore, there are advantages such as being able to reduce the number of periodic inspections of the dryer and prolonging the life of the entire device.

[Brief explanation of the drawing]

1 and 2 both show one embodiment of this invention, FIG. 2 is a longitudinal sectional view of a dryer according to this invention, FIG. 1 is a sectional view taken along the - line shown in FIG. 2, 3 and 4 show a conventional dryer, with FIG. 3 being a longitudinal sectional view of the dryer, and FIG. 4 being a sectional view taken along the line - shown in FIG. B... Dryer, 1... Furnace body, 8... Charge chute, 9... Scraping blade, 12... Charge casing, 12a... Projection, 13... Powder material.

Claims (1)

[Scope of utility model registration request] A part of a rotatably supported cylindrical furnace body is provided with a charging casing that surrounds the cylindrical furnace body, a charging chute is connected to the charging casing, and the charging chute is surrounded by the charging casing in the furnace main body. A plurality of input ports are provided on the side wall at appropriate intervals in the circumferential direction of the furnace body, and one side edge of the input port protrudes in the radial direction of the furnace body, and asphalt pavement waste material input from the input chute is provided. In a dryer in an asphalt regeneration plant, etc., which is equipped with scraping blades for guiding the materials into the inlet, the lower part of the inlet casing is made to protrude downward, and this protruding part is filled with powder and granular material. A dryer for use in asphalt regeneration plants, etc., characterized by: