KR100502642B1 - Apparatus of controlling penetration degree of asphalt in asphalt mixing plant - Google Patents

Abstract

The present invention relates to an invasion control process in which a continuous air injection process for obtaining high quality asphalt is applied to an asphalt mixing plant, and an intrusion control apparatus for realizing the same. As the control process is applied to the asphalt mixing plant, the air blown by the air compressor is injected downwardly through the nozzle into the mixer of the mixing plant including the aggregate and the asphalt, and the stirring of the asphalt together with the stirring by the stirring blade inside the mixer. By adjusting the intrusion degree, the intrusion control process including an additional process other than the air injection to control the invasion of the asphalt, and the conventional intrusion control apparatus including a complicated additional device other than the air injector to implement this As it becomes unnecessary, the invasion of the asphalt Is the minimum of equipment is installed relates to an adjustable penetration process and apparatus of the asphalt so that the asphalt concrete production expenses are reduced while being a pole made of the asphalt also controlled penetration can be produced for the section.

Description

Apparatus of controlling penetration degree of asphalt in asphalt mixing plant}

The present invention relates to an invasion control device installed in an asphalt mixing plant to adjust the invasion of the asphalt so that the inflow degree is adjusted while the asphalt flowing into the asphalt mixing plant is stirred with other materials. The penetration of the asphalt coated on the aggregate by stirring in the mixer by contact with the air injected through the degree adjuster is to be adjusted.

In general, the road is composed of a plurality of layers of asphalt concrete mixed with asphalt and granules classified by particle size and other additives for modification in accordance with the purpose of use.

Ascon laid on the road may cause damage such as bleeding, which is a phenomenon in which asphalt is raised on the surface of the road, rutting according to the passage of time and surface temperature, road running of the vehicle, and such phenomenon may occur in the ascon. It was very closely related to the nature of the asphalt included.

In order to eliminate this phenomenon, the rutting and bleeding after road pavement showed a high incidence in the summer for one to two years, but was reduced after three years or more, which is the summer ascon This is caused by contact between air and asphalt at a high temperature of about 60 to 70 ° C., and ascon is hardened together with asphalt to minimize the above-mentioned rutting and bleeding.

Based on the results of this study, a continuous air injection process for heating the asphalt and injecting air into the heated asphalt was performed to produce an artificial phenomenon in the asphalt, and thus, high-quality asphalt was obtained. Blown Asphalt.

The blown asphalt blows compressed air into heated straight asphalt or hard reduced-pressure distillation residue (VR) to cause condensation polymerization among the asphalt components, thereby increasing the molecular weight. Because of this small amount, it has been widely used for industrial purposes such as solid state, heat resistance and durable building materials at room temperature.

Meanwhile, in order to implement the continuous air injection process, an intrusion degree control device having a complicated structure is required. Looking at a more detailed example of blown asphalt for the continuous air injection process and the intrusion degree control device, FIG. As described above, in the conventional penetration control apparatus 100, straight asphalt or hard reduced-pressure distillation residue (hereinafter referred to as straight asphalt) stored in the storage tank 102 flows into the asphalt heater 104. It was heated to 230 ~ 260 ℃ and transferred to the cooling tank 106, while being moved in the cooling tank 106 is exposed to the air injected upward by the air compressor (106a) and sprayed by the coolant injector (106b) The surface of the straight asphalt was cooled by the cooling water, and the finished blown asphalt was stored in the storage 110.

Hazardous gases, petroleum components and odor generated at this time were removed via a scrubber 108 and an incinerator 109.

However, in the continuous air injection process for improving the properties of the asphalt, the heating of the asphalt is inevitable because the penetration control process is active at high temperature, and for this purpose, the heater 104 is required in the penetration control device 100. Of course, the cooling water injector 106b for cooling high temperature asphalt, and other elements for processing such as a cleaner 108 and an incinerator 109 for removing harmful gases and odors generated during cooling have been added. This required expensive production costs.

In addition, in order for the continuous air injection process to be applied to asphalt, a costly penetration control device 100 is required, and in order to achieve efficient penetration control of asphalt, it is desired that the asphalt is at a high temperature. Due to the inherent nature that must be installed, difficulties are inherent in the use of other asphalt production equipment, especially in the case of ascon produced in the asphalt mixing plant for road pavement, to control the invasion to improve the properties. When this asphalt is required, there is a problem that the penetration control device 100 including the heater 104 is required separately from the mixing plant.

The present invention has been made in view of the above problems, the asphalt is heated by the heat of the aggregate, which is added to the mixer of the asphalt mixing plant together with asphalt and other additives, so that the asphalt is a high temperature asphalt, the nozzle to the high temperature asphalt The intrusion control device is installed so that the air is injected through the air, so that the intrusion control device can be easily installed at a low cost while the intrusion control process can be performed in the asphalt mixing plant while removing the conventional intrusion control device separately manufactured in a complicated structure. It is an object of the present invention to provide an asphalt penetration control process of the asphalt concrete manufacturing method that can be produced in a high quality product and an intrusion control device for realizing the same.

The present invention for achieving the above object is a process for temporarily storing the aggregates firstly sorted to a certain standard in the cold bean; A process in which the aggregate heated while being transferred from the cold bin is reselected by a vibrating separator and temporarily stored in the hot bin; Aggregate conveyed from the hot bean introduced into the mixer is stirred with asphalt and the existing reforming material; Including ascon manufacturing method of the asphalt mixing plant made to produce ascon including, Asphalt is stirred in the mixer and coated on the aggregate Ascon manufacturing method includes a step in which rapid penetration control is performed in addition to the stirring process in a high temperature state by the air injected at a predetermined pressure from the upper side inside the mixer.

Aggregate collected in a predetermined place is transferred to a blender through cold bins and hot bins which are sorted by a sorting machine and temporarily stored while being transported by a conveying device, which is a conveyor or an elevator, and the aggregates and reformers and spraying devices added to the blender are added. In an asphalt mixing plant, the asphalt sprayed downward by the nozzle of the mixer is agitated by a stirring blade supported to be rotated to be discharged from the mixer, and is introduced from the outside through a supply pipe fixed to the upper side of the mixer. Asphalt penetration control device is made so that the air is agitated by the stirring blade through the nozzle installed in communication with the supply pipe and sprayed downward to the asphalt coated on the surface of the aggregate.

Hereinafter, the asphalt intrusion degree adjusting process and the intrusion degree adjusting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a process diagram schematically showing the asphalt invasion control process applied to the asphalt mixing plant according to the present invention, according to the present invention, the process of temporarily storing the first selected aggregate to the cold bin in a certain standard; A process in which the aggregate heated while being transferred from the cold bin is reselected by a vibrating separator and temporarily stored in the hot bin; Aggregate conveyed from the hot bin and introduced into the mixer 20 is stirred with asphalt and existing reforming materials; Agitation process in the mixer at the high temperature by the air is stirred in the mixer and the asphalt coated on the aggregate from the upper side inside the mixer 20 at a predetermined pressure; As a result, high quality ascon is produced.

The penetration control step is to include the aggregate and asphalt in the mixer 20 of the asphalt mixing plant to produce ascon, including agitation and air is injected into the asphalt coated on the aggregate is made to be controlled.

As the conventional heater 104 for the temperature rise of the asphalt is excluded, the asphalt flowing into the mixer 20 is naturally elevated in temperature by the temperature inside the mixer 20, and the high temperature asphalt will be described later. The penetration of asphalt is controlled by air injection through the penetration control device 10.

In this penetration control step, only the penetration control phenomenon caused by the contact of asphalt and air is generated, and the conventional cooling step 106b by the cooling water injected to cool the high temperature asphalt, and this cooling step 106b Since the process for removing harmful gases and odors is also unnecessary, only a minimum process for controlling the penetration of asphalt is used.

On the other hand, Figure 3 is an internal view schematically showing the penetration control device installed in the mixer so that the penetration control process to the asphalt according to the present invention, according to the present invention, the penetration control device 10 is a mixer 20 Air compressor (not shown) including a compressor (not shown) that is installed to the outside to control the operation by a controller (not shown), the air blown by the air compressor flows into the mixer 20 The air compressor and the feed pipe 12 is installed in communication with the interior of the mixer 20, the air flowing into the mixer 20 through the feed pipe 12 so as to be sprayed to the asphalt coated on the surface of the aggregate It comprises an air supply nozzle 14 is installed in communication with the supply pipe 12.

The controller is preferably installed to operate in the control room for driving the asphalt mixing plant, the air compressor is controlled to operate after the asphalt is coated on the surface of the aggregate by the stirring blade 22 installed inside the mixer 20. do. Unexplained reference numerals 24 and 26 are sprays installed so that the asphalt flowing in the inlet pipe 24 and the inlet pipe 24 flowing into the inlet pipe 24 are injected into the mixer 20 from the outside. Nozzle 26.

The air supply nozzles 14 are mutually compatible with the side edges of the stirring blades 22 such that the air sprayed in the state where the asphalt is injected to the overlapping portion of the stirring blades 22 rotated in the opposite direction and the stirring is in progress. It is preferable to be located in the installation.

The penetration control device 10 is a heater 104 for heating the asphalt, as well as a cooling water injector (106b) for cooling by spraying water to the asphalt, the penetration is controlled, the washing machine 108 and the incinerator ( 109) also eliminated the need for installation of a penetration control device 100 made of a conventional complex structure, according to the present application simply installed so that air is injected through the air supply nozzle 14 inside the mixer 20 do.

Air injected through the air supply nozzle 14 is injected for 20 to 55 seconds at an injection pressure of 0.5 to 10 kg / ㎠.

The injection pressure of the air supply nozzle 14 may vary according to the number of air supply nozzles 14 installed in proportion to the stirring area in the mixer 20, and the injection time of the air supply nozzles 14 is the stirring In the process, the stirring point and the end point of the asphalt and aggregate are set in consideration.

The invasion control device 10 of this structure can remove the coolant injector 106b and other accessory devices 108 and 109 due to the removal of the heater 104 which was required for the conventional invasion control device 100. It is possible.

Table 1 below is refined for asphalt purified from petroleum through the air supply nozzle (14)

As a result of comparing the pure asphalt and the state before and after the penetration control process was performed, the agitation time for approximately 55 seconds was applied to the pure AP-5 known to those skilled in the art. to be.

Table 1

Injection pressure (kg / ㎠) Injection time Intrusion before process Intrusion after process One 20 76-77 74 35 71 50 66 5 20 72 35 68 50 63 7 20 70 35 66 50 61

Hereinafter, the penetration control device according to the present invention will be briefly described according to the operating sequence.

First, the air blown by the operation of an air compressor such as a compressor installed outside the mixer 20 by a controller enters the mixer 20 through the air supply pipe 12, and the air supply pipe 12 When sprayed into the asphalt coated on the surface of the aggregate is stirred in the mixer 20 through the air supply nozzle (14) installed extending from the side to control the penetration of the asphalt is made with agitation to produce a good ascon do.

According to the present invention configured as described above, the infiltration degree control process of the asphalt used to produce high-quality asphalt is blown by the air compressor into the mixer of the plant containing the aggregate and asphalt to be applied to the asphalt mixing plant As the air is injected through the nozzle and the inside of the blender is stirred by the stirring blades to control the intrusion of the asphalt, the conventional invasion control device, namely, the asphalt induction heater, which is separately manufactured for the invasion control of the asphalt, is heated. When heated by the air is injected through the nozzle to control the penetration, water for cooling the asphalt is injected, and the harmful gas, petroleum component and odor generated at this time complex intrusion that was removed through the scrubber and incinerator The structure and process of the degree adjusting device It is changed to a simple structure and process that heats the asphalt mixed inside the mixer of the pallet mixing plant into the hot asphalt by injecting the air into the hot asphalt, and removes the cooling and odors. By removing the conventional invasion control device, which is separately manufactured at high cost by including other equipment for removing the back, the intrusion control device that can be made in the asphalt mixing control process in the asphalt mixing plant is simply installed at low cost Asphalt with controlled penetration has the effect of obtaining high quality asphalt concrete with reduced breakage.

1 is a process diagram schematically showing a continuous air injection process for producing a conventional blown asphalt,

Figure 2 is a block diagram schematically showing the invasion control process of asphalt applied in the asphalt mixing plant according to the present invention,

Figure 3 is a schematic internal view of the penetration control device installed in the mixer of the asphalt mixing plant for the penetration control process of Figure 2;

<Description of the symbols for the main parts of the drawings>

10 ... Intrusion adjuster 12 ... Air supply line,

14 ... Nozzle 20 ... Mixer.

Claims (2)

Cold bin for temporarily storing the primary sorted aggregate to a certain standard, Hot bin re-selected by a vibrating separator and temporarily stored so that the aggregate is heated while the aggregate is transported from the cold bin, and aggregates transferred from the hot bin and introduced into the mixer In the asphalt penetration control apparatus of the asphalt mixing plant made to produce ascon including a mixer having two stirring blades arranged in parallel to agitate the asphalt and the existing reforming material, Asphalt coated in the mixer and coated on the aggregate is sprayed at a predetermined pressure from the top of the inside of the mixer to a predetermined pressure in a high temperature state such that the rapid penetration control with the agitation process is carried out above the center of the mixer. Asphalt inlet pipe and air supply pipe are arranged in sequence, On top of the two stirring blades, two asphalt injection nozzles are arranged at both sides of the asphalt inlet pipe and bent vertically downward, respectively. In the periphery of the asphalt injection nozzle, two air supply nozzles in a shape surrounding the two asphalt injection nozzles are extended to both sides of the air supply pipe and bent in a vertical downward direction, respectively, the asphalt intrusion of the asphalt mixing plant Degree adjuster. The method of claim 1, Asphalt intrusion level control apparatus of the asphalt mixing plant, characterized in that the air supply nozzles are arranged at intervals on top of the asphalt injection nozzle.