JP2016117041A - Construction waste material refuse collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction waste material refuse collector capable of effectively separating and removing mixed refuses from a recycled aggregate obtained by crushing a construction waste material.SOLUTION: The construction waste material refuse collector includes a vibration screen 2 for screening recycled aggregates obtained by crushing construction waste materials by particle sizes, suction nozzles 4a and 4b for sucking and removing mixed refuses from the recycled aggregates thrown onto the screen nets 3a and 3b of the vibration screen 2, the suction nozzles 4a and 4b facing the tail end parts of the screen nets 3a and 3b, a static pressure sensor 12 installed in the midway of a suction duct 5 downstream of the suction nozzles 4a and 4b, and a static pressure/exhaust air amount controller 13 for variably controlling the exhaust air amount of the suction duct 5 based on a difference value amount between a static pressure value detected by the static pressure sensor 12 and a preset static pressure setting value, and is configured to suck and remove refuses from the recycled refuses on the screen nets 3a and 3b of the vibration screen 2 by a fixed suction force.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a construction waste removing device for removing waste such as wood chips and vinyl mixed from recycled aggregate obtained by crushing construction waste.

  Construction waste such as asphalt pavement material excavated by road construction, etc., concrete waste generated due to demolition work of concrete structures, etc. is crushed with various crushers and recovered as recycled aggregates, then with vibrating sieve etc. It is screened according to a predetermined particle size and reused as materials such as recycled composite materials and roadbed materials.

  It should be noted that the construction waste material contains not only a small amount of garbage such as wood chips and vinyl. Conventionally, from the recycled aggregate obtained by crushing the construction waste material, first, the waste material is roughly removed by hand sorting or the like. After that, when sieving by particle size with a vibrating sieve, there is one in which dust remaining without being manually removed by suction is removed by suction with an appropriate suction device or the like.

  For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 11-104566) discloses a suction duct through which dust is sucked in from a suction hood provided above a vibrating sieve, by sucking fine particles or lightweight garbage floating by vibration of the vibrating sieve. And a rotatable rotating recovery body having a filter that is provided in the middle of the nozzle and that crosses the flow of dust and attaches dust of a size larger than a predetermined size, and stores the attached dust dropped from the rotating recovery body. A dust storage section that is configured to collect dust by the rotary collection body, while collecting fine particles by a downstream bag filter. A take-off device is described.

Japanese Patent Application Laid-Open No. 11-104566

  However, in the above-mentioned conventional apparatus, after the light dust that floats up from the sieve mesh with the vibration of the vibrating screen is sucked and removed together with the fine recycled aggregate, unnecessary waste is separated and removed again on the downstream suction duct side for useful recycling. Since the aggregate is collected, a dedicated device / process for efficiently separating and removing the mixed dust from the many recycled aggregates sucked out together is necessary. For example, the vibration sieve If it is possible to effectively suck and remove unnecessary garbage without sucking out useful aggregate as much as possible from the recycled aggregate put on the sieve mesh, the separation and removal work of the waste in the subsequent process is unnecessary or can be reduced. It may be beneficial in terms of cost.

  This invention makes it a subject to provide the garbage removal apparatus for construction waste materials which can isolate | separate and remove the garbage mixed from the recycled aggregate obtained by crushing a construction waste material in view of said point.

  In order to solve the above-mentioned problems, according to the waste removal apparatus for construction waste according to claim 1 according to the present invention, the apparatus includes a vibrating sieve that screens recycled aggregate obtained by crushing the construction waste by particle size, A waste removal device for construction waste material that has a suction nozzle that sucks and removes the dust mixed from the recycled aggregate put on the sieve screen of the vibration sieve, and that has a dust collector and an air exhaust in the suction duct downstream of the suction nozzle. The suction nozzle faces the downstream side in the aggregate delivery direction of the sieve mesh, and a static pressure sensor is provided in the middle of the suction duct, and a static pressure value detected by the static pressure sensor is set in advance. A static pressure / exhaust air volume controller that variably controls the exhaust air volume of the suction duct based on the amount of difference from the static pressure set value of the dust, and with a certain suction force from the recycled aggregate on the sieve screen of the vibrating sieve It is configured so that it can be removed by suction. To have.

  Moreover, according to the construction waste material dust removal device according to claim 2, a regenerated aggregate which is disposed together with the dust by the dust collector, in which a biaxial crusher and a vibration feeder with a sieve screen are sequentially arranged below the dust collector. Is crushed by the biaxial crusher to at least a particle size that can pass through a sieve mesh of a sieve mesh-equipped vibratory feeder, and separated and collected from the dust remaining on the sieve mesh.

  According to the waste removal device for construction waste according to claim 1 of the present invention, the suction nozzle for sucking and removing the dust mixed from the recycled aggregate is made to face the downstream side in the aggregate delivery direction of the sieve screen of the vibration sieve, A static pressure sensor is provided in the middle of the suction duct downstream of the suction nozzle, and the suction duct is determined based on the amount of difference between the static pressure value detected by the static pressure sensor and a predetermined static pressure setting value set in advance. It is equipped with a static pressure / exhaust air volume controller that variably controls the exhaust air volume, and is configured so that dust can be sucked and removed from the recycled aggregate on the sieve screen of the vibrating sieve with a constant suction force. At the downstream side of the sieve mesh where most of the aggregate has finished passing through the sieve mesh, the mixed dust can be sucked while adjusting the suction force to match the weight of the dust with static pressure control, and recycled aggregate Effectively sucking and removing unnecessary dust while minimizing contamination It is possible.

  Moreover, according to the construction waste material dust removal device according to claim 2, a regenerated aggregate which is disposed together with the dust by the dust collector, in which a biaxial crusher and a vibration feeder with a sieve screen are sequentially arranged below the dust collector. In the biaxial crusher, at least the particle size that can pass through the sieve mesh of the vibration feeder with a sieve mesh is crushed and separated and collected from the dust remaining on the sieve mesh. Even if a part of the dust is sucked out together with the dust, it can be efficiently separated and recovered by the downstream dust collector, and the recycled aggregate can be recovered with high yield with a simple configuration.

It is a schematic explanatory drawing which shows one Example of the dust removal apparatus for construction waste materials which concerns on this invention.

  In the waste removal device for construction waste according to the present invention, a vibration sieve that screens the recycled aggregate obtained by crushing the collected construction waste material according to particle size, and the regeneration that is put on the sieve screen of the vibration sieve A suction nozzle for sucking and removing the dust mixed from the aggregate is provided, and a suction duct downstream of the suction nozzle is provided with a dust collector for collecting dust and a wind exhauster for obtaining the suction force of the suction nozzle.

  The suction nozzle has its tip end facing the downstream side of the sieve mesh in the aggregate delivery direction, and among the recycled aggregates put on the sieve mesh, most of the aggregates with relatively small particle size and light weight are sieve mesh. In the vicinity of the end of the sieve mesh, where the majority of the aggregate is relatively large and heavy in weight, it is designed to aspirate lightweight garbage with a difference in weight. While effectively using the difference in weight between the two, the suction of the recycled aggregate is suppressed as much as possible, and the dust is effectively sucked and removed.

  Further, a static pressure sensor for detecting static pressure is provided in the middle of the suction duct downstream of the suction nozzle, and a static pressure value detected by the static pressure sensor and a predetermined static pressure setting value set in advance. Equipped with a static pressure / exhaust air volume controller that variably controls the exhaust air volume of the suction duct based on the amount of difference between the suction value and the suction force that can be adjusted and maintained to match the relatively light weight of the dust. I am trying. The static pressure setting value is appropriate while confirming the actual dust suction condition, taking into account the amount, weight, or properties of the recycled aggregate to be put into the sieve mesh and the dust mixed therewith. The negative pressure value may be set as appropriate.

  Preferably, a biaxial crusher and a vibrating mesh screen feeder are arranged in order below the dust collector, and recycled aggregates captured together with dust in the dust collector are put into the biaxial crusher, and at least You may comprise so that it can pulverize to the particle size below which can pass the sieve screen of the vibration feeder with a lower sieve screen, and can separate and collect from garbage.

  Then, when separating and removing the mixed waste from the recycled aggregate obtained by crushing the construction waste with the construction waste removing device having the above-described configuration, firstly, the suction nozzle is used to satisfy the weight of the waste. An appropriate static pressure set value is set and registered in the static pressure / exhaust air volume controller so that an appropriate suction force without any pressure can be obtained. Then, when the recycled aggregate, which is the object to be processed, is put into the vibrating sieve, many of the relatively fine and lightweight aggregates pass through the sieve mesh immediately after being put, while the particle size is relatively small. Large and heavy aggregates are sent downstream on the sieve mesh without passing through the sieve mesh. As a result, in the vicinity of the end of the sieve mesh facing the suction nozzle, there is a weight. Recycled aggregate occupies the majority, and light dust is mixed in it, and the dust that floats with the vibration of the sieve mesh under that condition is effectively sucked from the suction nozzle and separated from the recycled aggregate It will be removed.

  In addition, when a biaxial crusher and a vibration feeder with a sieve screen are disposed below the dust collector provided in the suction duct downstream of the suction nozzle, the recycled aggregate captured together with the dust by the dust collector By crushing to a particle size that can pass through at least the sieve mesh of a vibration feeder with a sieve mesh with a shaft crusher, the waste of mixed wood chips, vinyl, etc. is freed from crushing due to its flexible properties, and the vibration feeder It becomes possible to efficiently separate and collect by utilizing the residue on the sieve mesh, and contribute to an improvement in the recovery rate of recycled aggregate with a simple configuration. In addition, the interval between the crushing axes of the biaxial crusher can be appropriately adjusted at least within a range smaller than the mesh of the sieve mesh vibration feeder, and adjusted to a desired particle size according to the adjustment width. The recycled aggregate can be recovered.

  Further, the suction nozzles may be individually faced to the plurality of sieve meshes having different mesh sizes arranged on the vibrating sieve, and in that case, relatively fine dust that can pass through the upper sieve mesh. Also, it can be removed by suction on the downstream side of the lower mesh screen, and it becomes possible to collect high-quality recycled aggregates with less contamination. At this time, if there is a difference in the weight of the dust on the upper screen and the dust on the lower screen, a damper or the like is provided on the downstream side of each suction nozzle to individually apply the suction force. You may make it adjust.

  In this way, dust is sucked and removed on the downstream side of the sieve mesh where the screening of the recycled aggregate put into the vibration sieve is completed to some extent, so that mixing of recycled aggregate when sucking dust is suppressed In addition, it is possible to eliminate or reduce the work of separating and removing the dust in the post-process, and the suction force required for sucking the relatively lightweight dust mixed in the recycled aggregate is sufficient. The ability is reduced, which is advantageous in terms of cost. In addition, even if recycled aggregate is mixed in the garbage collected by the dust collector, it can be efficiently separated and collected from the garbage with a vibrating feeder with a sieve mesh, etc. by darely crushing the recycled aggregate. It is possible to recover the recycled aggregate with good yield.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the figure, for example, 1 is a waste removal device for construction waste that separates and removes wood waste, vinyl, and other waste from construction waste such as asphalt pavement waste and concrete waste, and is obtained by crushing construction waste. And a suction nozzle 4a, 4b for sucking and removing dust mixed from the recycled aggregate put on the sieve meshes 3a, 3b of the vibration sieve 2. In addition, the suction duct 5 that connects the branch ducts 5a and 5b downstream of the suction nozzles 4a and 4b is provided with a cyclone 6 that is an inertia-type dust collector for collecting dust and the suction force of the suction nozzles 4a and 4b. The exhaust fan 7 is connected in order.

  The vibrating sieve 2 is composed of a plurality of sieve meshes 3a and 3b having different mesh sizes so that the recycled aggregate can be sieved for each particle diameter of, for example, a particle size of about 40 mm or more, about 13 to 40 mm, or about 13 mm or less. The main body casing 8 is vertically arranged, and the main body casing 8 is provided with a vibration body 9 and an input port 10 for the introduction of the aggregate at the upper end portion thereof, and each sieve mesh at the lower end portion. Discharge ports 11a, 11b, and 11c are provided for discharging the recycled aggregate screened according to the particle size at 3a and 3b.

  Also, the regenerated aggregate supplied to the respective sieve meshes 3a and 3b with the tip ends of the respective suction nozzles 4a and 4b facing the downstream side (right end side in the drawing) of the sieve meshes 3a and 3b, respectively. Among them, most of the aggregates are relatively fine and light in weight (the particle size is about 40 mm or less for the upper mesh screen 3a and the particle size is about 13 mm or less for the lower mesh screen 3b). 3b, and a relatively large and heavy aggregate (particle size of about 40 mm or more for the upper screen 3a, particle size of about 13 mm or less for the lower screen 3b) While trying to suck lightweight dust with a difference in weight in the vicinity of the end portions of the sieve meshes 3a and 3b that occupy the majority, while trying to make the weight difference between the recycled aggregate to be separated and the dust as large as possible, Effective suction and removal of dust while suppressing inhalation of recycled aggregate Unishi to have.

  In the middle of the suction duct 5 that connects the suction nozzles 4a, 4b and the cyclone 6, a static pressure sensor 12 for detecting static pressure is provided, and in the suction duct 5 detected by the static pressure sensor 12. Based on the amount of difference between the static pressure value and a predetermined static pressure setting value set in advance, for example, the rotational speed of the exhaust fan 7 that is controlled by the inverter is adjusted, or provided in the suction duct 5 for air volume adjustment. A static pressure / exhaust air volume controller 13 that variably controls the exhaust air volume of the suction duct 5 by adjusting the opening degree of the main damper (not shown), etc. It is possible to adjust and maintain a constant suction force that is appropriate for suction.

  It should be noted that there is a large difference in the weight and the like of the dust remaining on the upper screen mesh 3a and the dust remaining on the lower screen screen 3b, and there appears to be a difference in the suction force required for each suction nozzle 4a, 4b. If there is, a damper and a static pressure sensor are provided in each of the branch ducts 5a and 5b on the downstream side of each suction nozzle 4a and 4b, and the static pressure value in each branch duct 5a and 5b detected by each static pressure sensor is obtained. Based on the opening degree of the corresponding damper, the suction force of each suction nozzle 4a, 4b may be adjusted.

  The static pressure setting value set in the static pressure / exhaust air volume controller 13 is the amount, weight, or property (whether or not it is in a wet state) of recycled aggregates and dust put on the sieve screens 3a and 3b. ), Etc., and an appropriate negative pressure value may be set while confirming the actual dust suction condition. For example, the suction required for properly sucking dust due to fluctuations in the above conditions. Even when the force changes, it can be easily adjusted to an appropriate suction force by resetting the static pressure setting value. Further, since the static pressure in the suction duct 5 is detected, even if an unexpected situation occurs in which the suction duct 5 is clogged with dust or the like, it can be immediately detected and can be dealt with promptly.

  Further, a biaxial crusher 15 having two crushing shafts 14 pivotally supported at a predetermined interval and a sieve net 16 having a predetermined mesh size (for example, about 6 mm) are provided below the cyclone 6. The vibratory feeder 17 is arranged in order, and the recycled aggregate captured together with the dust in the cyclone 6 is put into the biaxial crusher 15 together with the dust, and at least the sieve mesh of the vibratory feeder 17 with a sieve mesh below it. By crushing to a particle size that can pass 16 or less, waste such as mixed wood waste and vinyl remains efficiently on the sieve mesh 16 without being crushed due to its flexibility. I try to be as possible. The intervals between the crushing shafts 14 can be adjusted as long as they are at least within a range smaller than the mesh of the sieve mesh 16 of the vibrating feeder 17 with sieve mesh, and the regenerated bone separated and recovered according to the adjustment width. It is also possible to adjust the particle size of the material.

  When separating and removing garbage from construction waste with the construction waste removing device 1 having the above-described configuration, first, an appropriate suction force corresponding to the weight of the dust is obtained by the suction nozzles 4a and 4b. As described above, an appropriate static pressure setting value is set and registered in the static pressure / exhaust air flow rate controller 13. Next, when the recycled aggregate obtained by crushing the construction waste material with an appropriate crushing facility is introduced from the inlet 10 of the vibrating sieve 2, it is sieved according to the particle size by the sieve meshes 3a and 3b. It is discharged from the discharge ports 11a, 11b, 11c.

  At this time, in each of the sieve meshes 3a and 3b, in the respective particle size ranges, many of the relatively fine and light aggregates are passed through the sieve meshes 3a and 3b immediately after being charged, while being relatively large. The heavy aggregate is sent out downstream of the sieve meshes 3a and 3b without passing through the sieve meshes 3a and 3b, and as a result, the sieve meshes 3a and 3b facing the suction nozzles 4a and 4b. In the vicinity of the end portion, the heavy aggregate occupies the majority, and light dust is mixed, and the dust that floats with the vibration of the sieve screens 3a and 3b in that state The suction nozzles 4a and 4b are effectively sucked and separated and removed.

  On the other hand, wood dust, vinyl, and other dusts sucked from the suction nozzles 4a and 4b are led out through the branch ducts 5a and 5b and the suction duct 5, and captured by the downstream cyclone 6, but sucked together. In some cases, the regenerated aggregate is captured together with dust by the cyclone 6, and the captured aggregate and dust are both put into the lower biaxial crusher 15 and subjected to the crushing process. At this time, garbage such as wood chips and vinyl is freed from crushing due to its flexible properties, and is sent to the end portion without passing through the screen mesh 16 of the lower vibration mesh-attached vibration feeder 17 and separated and removed. Is crushed to a predetermined particle size or less, passed through the sieve screen 16 of the vibration feeder 17 with the lower sieve mesh, and is effectively recovered as recycled aggregate.

  In the present embodiment, the cyclone 6 is employed as a dust collector for capturing dust, but the present invention is not necessarily limited to this, and other dust collectors can be appropriately employed. Although not shown in the drawing, the dust sucked by the suction nozzles 4a and 4b includes fine dust that cannot be sufficiently captured by the cyclone 6 that is an inertia dust collector. If necessary, a dust collector such as a bag filter may be installed downstream of the cyclone 6.

  As described above, according to the present invention, dust is sucked in the vicinity of the end portions of the sieve screens 4a and 4b of the vibration sieve 2, and appropriate and suitable for the weight of the dust by the static pressure control. Since suction is performed with suction force, it is possible to effectively remove and remove dust while suppressing the mixing of recycled aggregate as much as possible. It will be a thing.

DESCRIPTION OF SYMBOLS 1 ... Construction waste removal device 2 ... Vibrating sieve 3a, 3b ... Sieve net 4a, 4b ... Suction nozzle 5 ... Suction duct 5a, 5b ... Branch duct (suction duct)
6 ... Cyclone (dust collector) 7 ... Ventilator 12 ... Static pressure sensor 13 ... Static pressure / exhaust air flow controller 15 ... Biaxial crusher 17 ... Vibrating feeder with sieve mesh

Claims (2)

  A vibration sieve that screens the regenerated aggregate obtained by crushing the construction waste material according to particle size, and a suction nozzle that sucks and removes the dust mixed from the regenerated aggregate put on the sieve mesh of the vibration sieve, A dust removal device for construction waste having a dust collector and a wind exhauster in a suction duct downstream of the suction nozzle, wherein the suction nozzle faces the downstream side of the sieve mesh in the aggregate delivery direction, and is placed in the middle of the suction duct. A static pressure / exhaust air amount that includes a pressure sensor and variably controls the exhaust air amount of the suction duct based on a difference value between a static pressure value detected by the static pressure sensor and a predetermined static pressure set value set in advance. A waste removal apparatus for construction waste material, comprising a controller and configured to be able to suck and remove dust from the recycled aggregate on the sieve screen of the vibration sieve with a constant suction force.   A biaxial crusher and a vibration feeder with a sieve mesh are sequentially arranged below the dust collector, and the regenerated aggregate captured together with the dust by the dust collector is at least a sieve mesh of the vibration feeder with a sieve mesh. 2. The apparatus for removing waste for construction waste material according to claim 1, wherein the apparatus is crushed to a particle size that can pass through and separated and collected from the dust remaining on the sieve screen.

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