JP2006193928A - Asphalt paving waste material regenerative apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save a space for a dust collector of an asphalt paving waste-material regenerative apparatus while minimizing cost. <P>SOLUTION: A waste material storage bin 8 is connected to the lower end of a cold hopper 17 of a dryer 7 for waste material regeneration mounted to a high frame 10, an exhaust gas flue 18 is connected to the upper end of the waste material storage bin 8, and an exhaust gas flow passage converting plate 23 is suspended from the upper end inner wall of the waste material storage bin 8 for forming an inertia dust collecting mechanism. The exhaust gas discharged from the dryer 7 when the waste material is heated is led from the cold hopper 17 to the exhaust gas flue 18 through the waste material storage bin 8. In this case, the flow passage for the exhaust gas is suddenly converted from a downward direction to an upward direction by the exhaust gas flow passage converting plate 23, and the exhaust gas is led into a wide space in the waste material storage bin 8 to largely lower the flow velocity of the exhaust gas. As a result, dust in the exhaust gas precipitates falls to the lower part of the waste material storage bin 8, and collected. Then, the dust is mixed with the waste material heated by the dryer 7 for waste material regeneration. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an asphalt pavement waste material recycling apparatus that heats and recycles asphalt pavement waste material dug up by road construction.

  The applicant has applied for an asphalt pavement waste material recycling device that has a hierarchical structure by stacking all the facilities of the recycling plant, including the waste material recycling dryer, on an elevated platform in order to save space and maintenance (patent) Reference 1). This equipment is equipped with a waste material recycling dryer at the top of the elevated platform, a large capacity waste material storage bin is connected to the lower end of the cold material hopper on the waste material discharge side of the waste material recycling dryer, and the heated waste material heated and regenerated by the dryer is connected to this device. The waste is stored directly in the waste storage bin. In addition, part of the high-temperature exhaust gas that has passed through the dryer is returned to the combustion chamber of the waste material recycling dryer for use, and for this reason, a simple cyclone dust collector is mounted on the elevated platform, and this cyclone dust collector After removing the sticky dust contained in the exhaust gas, a part of the exhaust gas is reduced to the combustion chamber of the waste material recycling dryer.

By the way, as in the case of the above device, when a cyclone dust collector is installed on an elevated platform, a certain amount of space is required, and the sticky dust captured by the cyclone dust collector must be periodically taken out and disposed of for maintenance. In order to solve this problem, the applicant newly extended the upper part of the waste storage bin upward to form an upper storage bin extension. An application has been filed in which an exhaust gas impingement plate is provided in the section to form an inertia dust collection mechanism, and dust in the exhaust gas is captured by this inertia dust collection mechanism and collected in a waste storage bin (Patent Document 2). .
Utility Model Registration No. 2572850 Utility Model Registration No. 2604874

  However, if the upper part of the waste material storage bin is extended largely upward as described above to form the storage bin upper extension, the storage bin becomes larger and the cost is increased.

  In view of the above points, the present invention incorporates a dust collection mechanism into a waste material storage bin of a recycling plant that is stacked on an elevated platform in a hierarchical structure without particularly increasing its size, and saves space while minimizing cost increase. It is another object of the present invention to provide an asphalt pavement waste material recycling apparatus that can effectively use the collected dust as recycled waste material.

  In order to solve the above problems, the asphalt pavement waste material recycling apparatus according to the present invention is equipped with a waste material recycling dryer for heating and recycling waste material on an elevated platform, and the cold hopper lower end on the waste material discharge side of the dryer In the asphalt pavement waste material recycling apparatus connected to the waste material storage bin that temporarily stores the heated waste material discharged from the dryer, the exhaust flue is connected to the upper end portion of the waste material storage bin and the inner wall of the upper end portion of the waste material storage bin. Constitutes an inertial dust collection mechanism that suspends the exhaust gas flow path turning plate and turns the exhaust gas flow path led out from the dryer to the exhaust flue through the waste material storage bin once downward in the waste material storage bin, The dust in the exhaust gas captured by the inertia dust collection mechanism is collected in a waste material storage bin.

  According to the asphalt pavement waste material recycling apparatus according to the present invention, a waste material recycling dryer for heating and recycling waste material is mounted on an elevated platform, and the heated waste material discharged from the dryer at the lower end of the cold hopper on the waste material discharge side of the dryer is mounted. In the asphalt pavement waste material recycling apparatus connected to the waste material storage bin for temporary storage, the exhaust flue is connected to the upper end portion of the waste material storage bin, and the exhaust gas flow path turning plate is suspended on the inner wall of the upper end portion of the waste material storage bin, Exhaust gas trapped by the inertia dust collection mechanism, which constitutes an inertia dust collection mechanism in which the flow path of the exhaust gas led out from the dryer through the waste material storage bin to the exhaust flue is turned from downward to upward in the waste material storage bin Since the dust inside is collected in the waste storage bin, it is possible to incorporate a dust collection mechanism without increasing the size of the waste storage bin. It is possible to save space while minimizing the cost increase, and the dust collected by the dust collection mechanism is stored in the waste material storage bin, so it is not necessary to dispose of it regularly as in the conventional equipment, thus reducing maintenance. Can be used effectively as recycled waste. Further, since the exhaust gas passes through the waste storage bin, it is convenient to keep the heated waste in the waste storage bin warm.

  In the asphalt pavement waste material recycling apparatus according to the present invention, the waste material storage bin is connected to the cold hopper lower end portion of the waste material recycling dryer, and the exhaust flue is connected to the upper end portion of the waste material storage bin. In addition, an exhaust gas channel turning plate is hung on the inner wall of the upper end of the waste material storage bin, and the exhaust gas channel led out from the dryer to the exhaust flue through the waste material storage bin faces downward in the waste material storage bin in the middle. Inertia dust collection mechanism is configured to rapidly change from upward to downward, and dust captured by the inertia dust collection mechanism is collected in the waste material storage bin.

  And when the asphalt pavement waste material is heated and regenerated by the asphalt pavement waste material recycling apparatus according to the present invention, the waste material discharged from the dryer is delivered to the lower-level waste material storage bin via the cold hopper. On the other hand, the exhaust gas derived from the dryer passes through the waste storage bin and is discharged from the exhaust flue. At this time, the exhaust gas flow path is temporarily turned downward once and suddenly by the exhaust gas flow path turning plate provided in the middle of the exhaust gas flow path, and is relatively rough in the exhaust gas due to the inertia dust collection action that works at that time. Dust having a particle size is captured, and the captured dust is collected in a waste material storage bin and mixed with the heated waste material being stored.

  As described above, the exhaust flue is connected to the upper end portion of the waste material storage bin connected to the lower end portion of the cold hopper, and the exhaust gas flow path turning plate is suspended on the inner wall of the upper end portion of the waste material storage bin to incorporate the inertia dust collection mechanism. Thus, there is no need to separately install a dust collector or increase the size of the waste material storage bin as in the prior art, and space can be saved while minimizing cost increase. The collected dust can be reused by mixing it with the heated waste material in the waste material storage bin.

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

  The asphalt plant includes an aggregate dryer 1 for heating and drying the aggregate, a dust collector 2 for capturing dust derived from the aggregate dryer 1, a plant body 3 for storing, measuring, and mixing the heated aggregate, and other incidental equipment. Etc.

  The aggregate dryer 1 rotates a cylindrical drum so as to rotate freely and rotates at a predetermined speed, and rolls the supplied aggregate while rolling it up by a number of scraping blades arranged inside the drum. It is brought into contact with hot air sent from the burner 4 in the meantime, heated to a predetermined temperature, and supplied to the plant main body 3 via the hot elevator 5. Further, the exhaust gas derived from the aggregate dryer 1 passes through the flue 6 and is introduced into the dust collector 2, where the dust contained in the exhaust gas is captured and released into the atmosphere.

  On the other hand, an asphalt pavement waste material recycling apparatus for heating and recycling waste materials is a waste material recycling dryer 7 for heating and recycling waste materials, a waste material storage bin 8 for temporarily storing heated waste materials, a waste material measuring tank 9 for measuring a predetermined amount of heated waste materials, and other incidentals. It consists of equipment.

  Each apparatus of the asphalt pavement waste material recycling apparatus is piled up on an elevated platform 10 erected on the side of the plant body 3 of the asphalt plant. On the upper floor 11 of the elevated platform 10, a waste material regeneration dryer 7 that is rotatably supported on a dryer base 12 is mounted. Further, a burner 13 and a long combustion chamber 14 that forms a flame of the burner 13 are disposed in a space below the waste material regeneration dryer 7, and the combustion chamber 14 is used as a hot hopper 15 of the waste material regeneration dryer 7. The hot air generated by the burner 13 connected to the side is introduced into the waste material recycling dryer 7. As described above, it is preferable to dispose the burner 13 and the combustion chamber 14 in a lower space of the waste material regeneration dryer 7 without overhanging from the end of the waste material regeneration dryer 7 and to save space.

  On the hot hopper 15 side of the waste material recycling dryer 7, a bucket elevator 16 that lifts the waste material from the ground and supplies it into the drum is disposed. Further, a waste material storage bin 8 for temporarily storing heated waste material is connected to a lower end portion of the cold hopper 17 on the waste material discharge side of the waste material regeneration dryer 7, and the waste material discharged from the waste material regeneration dryer 7 is cold hopper 17. It falls into the waste material storage bin 8 below.

  An exhaust flue 18 is connected to the upper end portion of the waste material storage bin 8 along with the cold hopper 17. The exhaust flue 18 is disposed on the lower floor 19 of the elevated platform 10 and is a fan 20 for exhaust gas suction and exhaust. Connected to. The exhaust gas led out from the waste material recycling dryer 7 to the exhaust flue 18 through the waste material storage bin 8 then passes through the fan 20, and a part of the exhaust gas passes through the exhaust flue 21 for heat recovery. After that, it is reduced to the combustion chamber 14 and other exhaust gas is sent to the dust collector 2 of the asphalt plant through the exhaust flue 22.

  In addition, an exhaust gas passage diverting plate 23 is suspended at an intermediate position between the connection portion of the cold hopper 17 and the connection portion of the exhaust flue 18 which is the inner wall of the upper end portion of the waste material storage bin 8, As shown by the arrow in FIG. 4, the flow path of the exhaust gas led out from the waste material storage bin 8 to the exhaust flue 18 is rapidly turned from the downward direction to the upward direction in the waste material storage bin 8. Thus, an inertia dust collecting mechanism for capturing dust in the exhaust gas by inertial force is configured, and the dust in the captured exhaust gas is recovered in the waste material storage bin 8 as it is.

  When the waste material is heated by the waste material recycling dryer 7, the exhaust gas generated in the dryer 7 is led out from the cold hopper 17 side to the exhaust flue 18 through the waste material storage bin 8. At this time, the exhaust gas is abruptly turned from the downward direction to the upward direction by the exhaust gas flow path turning plate 23 suspended from the inner wall of the upper end portion of the waste material storage bin 8 and introduced into a wide space in the waste material storage bin 8. As a result, the flow velocity is also greatly reduced, so that inertial force acts and dust in the exhaust gas settles, falls to the lower part of the waste material storage bin 8 and is collected and recovered. The dust collected and collected is stored in the waste material storage bin 8 together with the waste material heated by the waste material recycling dryer 7 and used as a material for the asphalt mixture.

  In this way, the exhaust flue 18 is connected to the upper end portion of the waste material storage bin 8 connected to the lower end portion of the cold hopper 17 of the waste material recycling dryer 7, and the exhaust gas flow path turning plate is connected to the inner wall of the upper end portion of the waste material storage bin 8. Since the inertia dust collection mechanism is configured by hanging 23, there is no need to particularly increase the size of the waste material storage bin as in the conventional device, and the space can be saved while minimizing the cost increase and the recovery is possible. The dust thus collected can be reused by mixing it with the heated waste material in the waste material storage bin 8.

It is a front view which shows one Example of the asphalt pavement waste material reproduction | regeneration apparatus which concerns on this invention. It is a side view of FIG. It is a top view of FIG. It is a principal part enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Aggregate dryer 3 ... Plant main body 7 ... Waste material reproduction dryer 8 ... Waste material storage bin 9 ... Waste material measurement tank 10 ... Elevated stand 15 ... Hot hopper 17 ... Cold hopper 18 ... Exhaust flue 23 ... Exhaust gas flow path turning plate

Claims (1)

  Asphalt pavement waste recycling with a waste material regeneration dryer that heats and recycles waste material on an elevated platform, and a waste material storage bin that temporarily stores heated waste material discharged from the dryer at the lower end of the cold hopper on the waste material discharge side of the dryer In the apparatus, an exhaust flue is connected to an upper end portion of the waste material storage bin, and an exhaust gas flow path turning plate is suspended on the inner wall of the upper end portion of the waste material storage bin, and the exhaust flue is passed from the dryer through the waste material storage bin to the exhaust flue. An inertia dust collection mechanism is constructed in which the flow path of the exhaust gas to be led is turned from downward to upward in the waste material storage bin, and the dust in the exhaust gas captured by the inertia dust collection mechanism is collected in the waste material storage bin. Asphalt pavement waste material recycling equipment characterized by that.

Images