JP5918616B2 - Dust removal system for sealed waste disposal sites - Google Patents

Description

  The present invention relates to a dust removal system for an enclosed waste disposal site.

  In recent years, it is possible to reliably prevent dust and odors from diffusing to the outside, so a waste structure such as a managed final disposal site is provided with a series of side walls and a roof structure that covers the top, and the interior space is substantially sealed. The number of cases of building disposal sites is increasing.

  On the other hand, in such a closed-type waste disposal site (closed system (CS) disposal site), the internal space is a sealed space, so when dumping and disposing of the waste transported by a dump truck, etc. as much as possible It is important to suppress the generation of dust and to efficiently remove the generated dust from the air in the sealed space. For this reason, conventionally, closed-type waste disposal sites have been equipped with water sprinklers, and while sprinkling water, waste is dumped, and waste is turned over, leveled, and compacted by heavy machinery to generate dust. (See, for example, Patent Document 1 and Patent Document 2).

JP 2012-024676 A JP 2002-191922 A

  However, simply performing watering cannot sufficiently suppress the generation of dust or remove the generated dust. For this reason, in particular, in an enclosed waste disposal site where waste containing hazardous substances is disposed in an enclosed space, it is efficient and effective in terms of preventing health hazards to workers and spreading harmful substances to the outside. In particular, a technique for removing dust from the air and a technique for suppressing the generation of dust have been strongly desired.

  In view of the above circumstances, an object of the present invention is to provide a dust removal system for an enclosed waste disposal site that enables efficient and effective removal of dust from the air.

  In order to achieve the above object, the present invention provides the following means.

A dust removal system for a sealed waste disposal site according to the present invention is a system that removes dust generated in a sealed space of a sealed waste disposal site, and generates water particles from above in the sealed space. A water particle shower forming means for forming a water particle shower by spraying, and a water particle shower arranged in the water particle shower forming region, and generating an air flow in the sealed space, and forming the water particle shower by the air flow A dust guiding means for guiding dust floating in the air in the sealed space in the area, and disposed outside the water particle shower, allowing water to flow downward from above in the sealed space, or in the sealed space from above is jetted water particles comprising a water curtain forming means for forming a water curtain, the said water particles shower forming means and the water curtain forming means is movable, in the water curtain forming means Water forming water curtain, to flow in a region where the water particles shower falls, is positionable the water particles shower forming means and the water curtain forming means, the dust guide means, the water particles shower The suction device is provided immediately below the forming means.

  In this invention, the water particle shower formed by sprinkling water particles from the upper side to the lower side can be formed by the water particle shower forming means provided in the sealed space of the sealed waste disposal site. And when the water particle shower is formed in this way, dust (particles) suspended in the air in the water particle shower formation area can be captured by the water particles, and the dust is dropped together with the water particles from the air. It becomes possible to remove.

  At this time, for example, a suction device that sucks the internal air in the sealed space to generate an air flow, or opens and closes the sealed space to the outside to generate a pressure distribution in the sealed space. Equipped with dust guiding means such as an open / close device that generates air flow, and by generating air flow in the sealed space with this dust guiding means, the dust in the sealed space is forcibly induced in the formation area of the water particle shower It becomes possible to make it. Thereby, it becomes possible to efficiently capture and remove dust from the air with water particles.

Further, in the dust removal system of the sealed waste disposal site of the present invention, the dust floating in the air is trapped by the water particles of the water curtain and dropped on the ground surface, and the dust that has been dropped is re-diffused. It is prevented by the water from the water curtain that falls to the ground surface and flows to the area, and further, the water that has flowed to the area is infiltrated into the deposited waste to separate harmful substances from the waste, and to remove the harmful substances. Collect and treat leachate containing.

  In the present invention, the water curtain is formed by the water curtain forming means at a position outside the water particle shower appropriately selected according to the air flow direction in the sealed space generated by the dust guiding means. Together with the water particle shower formed by the particle shower forming means, this water curtain can also capture and remove dust from the air. Thereby, dust can be more efficiently removed by the two means including the water particle shower forming means and the water curtain forming means.

  Furthermore, in the dust removal system of the sealed waste disposal site of the present invention, it is more preferable that the dust removal system further includes an air flow confirmation means for confirming the state of the air flow in the sealed space.

  In this invention, for example, by providing an air flow confirmation means such as a windsock or a soap bubble tracer generator, the behavior of the windsock and the behavior of the soap bubbles generated from the soap bubble tracer generator can be grasped. The flow of air inside can be visualized, and the state of air flow in the sealed space can be confirmed. For example, by providing a water particle shower forming means, a water curtain forming means, and a dust guiding means in a stagnation region of the air flow, dust can be more efficiently removed.

  Further, in the dust removal system of the sealed waste disposal site of the present invention, the water particle shower forming means generates water particles and charges the water particles by an induction charging method to generate charged water particles. It is further desirable to be charged water particle shower forming means for forming a charged water particle shower by spraying from above in the sealed space.

  In this invention, the charged water particle shower formed by sprinkling charged water particles downward from above by the charged water particle shower forming means as the water particle shower forming means provided in the sealed space of the sealed waste disposal site. Can be formed. When the charged water particle shower is formed in this way, dust (particles) suspended in the air in the charged water particle shower formation region can be electrically adsorbed and captured by the charged water particles, It becomes possible to drop the dust together with the particles and remove it from the air. Thereby, it becomes possible to capture and remove dust from the air more efficiently.

  Furthermore, in the dust removal system for a closed-type waste disposal site of the present invention, the charged water particle shower forming means includes an ejection nozzle unit that generates the water particles while ejecting pressurized water, and a predetermined voltage. Is applied to form a predetermined electric field, and the water particles generated by the ejection nozzle unit are charged by the electric field to form the charged water particles, and a reference potential of a voltage applied to the induction electrode unit It is more desirable to be provided with the water side electrode part which gives water.

  In the present invention, the water particles generated at the ejection nozzle portion of the charged water particle shower forming means can be charged by the electric field formed by the induction electrode portion, and the charged water particles are generated and ejected easily and reliably. be able to.

In addition, when a plurality of charged water particle shower forming means are provided, it is conceivable that the water-side electrode portion for providing a reference potential is shared by a plurality of charged water particle shower forming means. If the water-side electrode unit is used by the water particle shower forming means, the charging efficiency of the charged water particles (charged water particle group) generated by each charged water particle shower forming means is lowered.
On the other hand, as in the present invention, when each charged water particle shower forming means is configured to include a water-side electrode portion, it is possible to reliably generate charged water particles having a desired specific charge. It becomes possible to remove dust suspended in the air reliably and efficiently.

  In the dust removal system for a sealed waste disposal site according to the present invention, it is more preferable that the charged water particle shower forming means is configured to generate the water particles having a particle size of 100 to 300 μm.

  Here, if the particle size of the water particles generated by the charged water particle shower forming means is smaller than 100 μm, the charged water particles after charging the water particles are likely to evaporate, and the dust removing effect is not exhibited. End up. In addition, if the particle size of the generated water particles is larger than 300 μm, the number of charged water particles generated and ejected by charging the water particles with the charged water particle shower forming means is reduced, and the dust removal effect is also achieved. Will not be fully demonstrated.

  In the present invention, the water particles having a particle diameter of 100 to 300 μm are generated by the charged water particle shower forming means, and thus various particles having a particle diameter of 300 μm or less and more finely divided by the action of Coulomb force. By generating charged water particles having a particle size, it is possible to more reliably and effectively remove dust floating in the air.

  Further, in the dust removal system of the sealed waste disposal site of the present invention, the voltage applied when the charged water particles are generated by the charged water particle shower forming means may be in the range of −20 kV to 20 kV. desirable.

  In the present invention, it is possible to prevent the occurrence of corona discharge by setting the voltage applied when the charged water particles are generated by the induction charging method by the charged water particle shower forming means in the range of −20 kV to 20 kV.

  Furthermore, in the dust removal system of the sealed waste disposal site of the present invention, a predetermined voltage is applied to form a predetermined electric field, and the water particles are charged by the electric field to form the charged water particles. More preferably, the induction electrode portion of the charged water particle shower forming means is formed by insulatingly covering the electrode.

  In the present invention, the induction electrode portion to which a high voltage is applied in order to charge the water particles is formed by insulatingly covering the electrode, thereby preventing the occurrence of electrical short circuit and discharge.

  Furthermore, in the dust removal system of the sealed waste disposal site of the present invention, a plurality of charged water particle shower forming means are provided, a predetermined voltage is applied to form a predetermined electric field, and the water particles are separated by the electric field. Each of the plurality of voltage application lines connecting the induction electrode portion of each charged water particle shower forming means for charging to the charged water particles and a power source for applying a predetermined voltage to the induction electrode portion, Desirably, a current limiting means is provided.

  In the present invention, when a plurality of charged water particle shower forming means are provided, considering the rational configuration of the dust removal system, a voltage is applied to the induction electrode portions of the plurality of charged water particle shower forming means by one power source. Will be applied. In this case, for example, when a short circuit occurs on one charged water particle shower forming means side, a short circuit also occurs on the other charged water particle shower forming means side. On the other hand, as in the present invention, if each of the plurality of voltage application lines connecting the induction electrode portions of the plurality of charged water particle shower forming means and the power source is provided with current limiting means, one charged water particle Even if a short circuit occurs in the shower forming means, the current flowing through the other charged water particle shower forming means is limited, and it is possible to prevent a short circuit from occurring in the other charged water particle shower forming means.

  Moreover, in the dust removal system of the sealed waste disposal site of the present invention, it is desirable that the charged water particle shower forming means is configured to generate the charged water particles of 1 to 2 L / min.

  In the present invention, by generating charged water particles of 1 to 2 L / min by the charged water particle shower forming means, 0.1 mC / kg is secured while securing a required amount of charged water particles (sprayed water amount). The charged water particles having the above high specific charge can be stably generated, and dust suspended in the air can be removed reliably and effectively.

  Furthermore, in the dust removal system of the sealed waste disposal site of the present invention, at least one of polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics, and soot More preferably, the induction electrode portion is formed by insulatingly covering the electrode with an insulating material.

  In this invention, as an insulating material for insulatingly coating the electrode of the induction electrode portion for charging water particles, polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, By using ceramics and soot, it becomes possible to generate charged water particles having a specific charge equal to or higher than that of charged water particles generated by an electrode that is not covered with insulation.

  According to the dust removal system of the sealed waste disposal site of the present invention, the water particle shower is formed by forming the water particle shower by the water particle shower forming means provided in the sealed space of the sealed waste disposal site. It is possible to adsorb dust suspended in the air in the formation region of the water to the water particles and drop the dust together with the water particles to remove from the air.

  Further, at this time, it is possible to generate an air flow in the sealed space by the dust guiding means, and to forcibly induce the dust in the sealed space in the formation region of the water particle shower. It is possible to capture dust and remove it from the air.

  Therefore, in the dust removal system of the sealed waste disposal site of the present invention, dust generated in the sealed space of the sealed waste disposal site is efficiently and effectively removed as compared with the conventional simple watering. It becomes possible.

It is a figure which shows the dust removal system of the sealed-type waste disposal site which concerns on one Embodiment of this invention. It is a perspective view which shows the charged water particle shower formation means (water particle shower formation means) of the dust removal system of the sealed-type waste disposal site which concerns on one Embodiment of this invention. It is sectional drawing which shows the charged water particle shower formation means (water particle shower formation means) of the dust removal system of the sealed-type waste disposal site which concerns on one Embodiment of this invention. It is a figure which shows the electric system of the charged water particle shower formation means of the dust removal system of the sealed-type waste disposal site which concerns on one Embodiment of this invention. It is a figure which shows the relationship between the application quantity of the charged water particle shower formation means of the dust removal system of the closed-type waste disposal site which concerns on one Embodiment of this invention, and the specific charge of a charged water particle.

  Hereinafter, a dust removal system for a sealed waste disposal site according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Here, this embodiment is provided in a closed-type waste disposal site (closed system disposal site), and dust removal for efficiently removing dust generated by disposal of waste from the air in the sealed space. It is about the system.

  First, as shown in FIG. 1, the sealed waste disposal site 1 of the present embodiment includes a series of side walls 2 that form an outer periphery, and a roof that is laid across both sides in the width direction of the side walls 2 so as to cover the upper part. The structure 3 is provided so that the internal space can be substantially sealed. Thereby, it is possible to prevent the dust, odor, and the like from the waste 5 disposed in the internal sealed space 4 from diffusing to the outside.

  Moreover, in the sealed waste disposal site 1 of the present embodiment, the roof structure 3 is formed by covering, for example, a lightweight steel truss structure with an outer skin. Further, on the side wall 2 (or the roof structure 3), an openable / closable door 6 serving as a carry-in gate is installed, and a dump truck enters the disposal site 1 from the openable / closable door 6 and travels along the traveling path to be appropriately determined. The waste 5 is dumped at a given position. Further, the side wall 2 or the roof structure 3 has a ventilation fan for introducing outside air (not shown) for taking outside air inside, a ventilation for exhausting inside air for discharging the inside air to the outside through a deodorizer filter or the like. A fan (not shown) is provided. Furthermore, a drainage pipe, a drainage pit, and other facilities are provided inside and outside the disposal site 1 as necessary.

  On the other hand, this sealed waste disposal site 1 is equipped with a dust removal system A of a sealed waste disposal site for removing dust generated in the internal sealed space 4 (and for suppressing generation of dust). Has been.

  And the dust removal system A of this embodiment produces | generates a water particle, and it sprays from the inside in the sealed space 4 while charging this water particle by the induction charging system, and producing | generating charged water particle W1, and is charged water particle. The charged water particle shower forming means (water particle shower forming means) 11 for forming the shower (water particle shower) 10 and the air flow R are generated in the sealed space 4. A dust guiding means 12 for guiding dust floating in the air of the sealed space 4 in the formation area; and a water curtain forming means 14 for forming a water curtain 13 that flows downward from above on the outside of the charged water particle shower 10; It is configured with.

  As shown in FIGS. 2 and 3, the charged water particle shower forming means 11 includes an ejection nozzle portion 16, an induction electrode portion 17, and a water side electrode portion 18.

  The induction electrode portion 17 of the present embodiment is formed by insulatingly covering a member such as a conductive metal (electrode 17a) with an insulating material 17b, and includes a ring-shaped electrode main body portion 19 and the electrode main body portion. 19 and a rod-shaped connecting portion 20 having one end connected. In addition, the induction electrode portion 17 includes at least one of polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics (alumina ceramics), and glass bottle as an insulating material 17b. It is formed using.

  The water-side electrode portion 18 is formed using a member such as a conductive metal (electrode 18a), and is formed in a cylindrical shape in the present embodiment.

  Here, the induction electrode portion 17 and the water-side electrode portion 18 may be formed using a conductive resin, fiber bundle, rubber, or the like, other than metal, as the conductive members 17a and 18a. Moreover, you may form using the composite_body | complex which combined these.

  Next, the ejection nozzle portion 16 is formed by integrally assembling the first flow path forming member 21, the second flow path forming member 22, the ejection nozzle 23, and the ejection nozzle mounting member 24 in a separable manner. .

  The first flow path forming member 21, for example, an insulating material (non-conductive material) such as vinyl chloride resin is used and is formed in a substantially disk shape. In addition, a water circulation hole 26 having a circular cross section extending in the direction of the central axis O1 and penetrating therethrough is formed at the center thereof. Further, the first flow path forming member 21 is provided with a cylindrical pipe connection portion 27 protruding outward from the one surface 21a in the central axis O1 direction at the center on the one surface 21a side. A water circulation hole 26 is formed at the protruding end of the pipe connection portion 27 in communication.

  Further, in the first flow path forming member 21, the water flow hole 26 on the other surface 21 b side is formed with a larger diameter than the pipe connection portion 27 side, and this large diameter portion is the water-side electrode holding portion 28. . Further, the water-side electrode holding portion 28 of the water flow hole 26 of the first flow path forming member 21 is formed with an annular seal material mounting recess 29 that is recessed radially outward from the inner surface and extending in the circumferential direction. . Further, the first flow path forming member 21 is formed with screw bolt insertion holes 30 penetrating from the one surface 21a to the other surface 21b on both outer peripheral sides with the water circulation hole 26 in between.

  Similar to the first flow path forming member 21, the second flow path forming member 22 is formed in a substantially disk shape using an insulating material such as vinyl chloride resin, and has a central axis O2 in the center thereof. A water circulation hole 26 having a circular cross section extending and penetrating is formed. On the other hand, the second flow path forming member 22 is formed with a diameter larger than that of the first flow path forming member 21, and is formed at the center on the other surface 22b side opposite to the one surface 22a with which the first flow path forming member 21 contacts. A cylindrical ejection nozzle mounting portion 31 that protrudes outward from the other surface 22b in the direction of the central axis O2 is provided. A water circulation hole 26 is formed at the protruding end of the ejection nozzle mounting portion 31 so as to communicate with the inner hole of the ejection nozzle mounting portion 31. The ejection nozzle mounting portion 31 has a male screw 32 threaded on the outer peripheral surface.

  Further, in the second flow path forming member 22, the water circulation hole 26 on the one surface 22 a side is formed with a larger diameter than the ejection nozzle mounting portion 31 side, and this large diameter portion is the water side electrode holding portion 33. . Further, the water side electrode holding portion 33 of the second flow path forming member 22 is formed with the same diameter as the water side electrode holding portion 28 of the first flow path forming member 21 and is recessed radially outward from the inner surface. The annular seal member mounting recess 34 extends in the circumferential direction. The second flow path forming member 22 is formed with an annular seal material mounting recess 35 that is recessed from the one surface 22a toward the other surface 22b and extends in the circumferential direction about the central axis O2. Further, the second flow path forming member 22 is formed with female screw holes 36 that are recessed from the one surface 22a toward the other surface 22b side on both outer peripheral sides with the water circulation hole 26 in between. In addition, an induction electrode insertion hole 37 that penetrates from one surface 22 a to the other surface 22 b and passes through the connection portion 20 of the induction electrode portion 17 is formed on the outer peripheral edge side.

  Further, the second flow path forming member 22 is provided with an electrode fixing portion 38 for fixing and supporting the induction electrode portion 17 in a detachable manner. In the present embodiment, the electrode fixing portion 38 is formed in an approximately L shape using an insulating material such as vinyl chloride resin, and has one end connected to the other surface 22b of the second flow path forming member 22 and the like. The end is disposed toward the central axis O2. In the present embodiment, three electrode fixing portions 38 are attached to the second flow path forming member 22, and these electrode fixing portions 38 are centered on the central axis O <b> 2 of the second flow path forming member 22. They are arranged at equal intervals in the circumferential direction. Each electrode fixing portion 38 is formed with an engaging recess 38a at the other end for engaging and holding the electrode main body portion 19 of the induction electrode portion 17.

  The ejection nozzle 23 is formed in a substantially disk shape, and has a nozzle hole 23a through which water W2 flows in the center and is ejected in a mist form from the tip. Further, the ejection nozzle 23 is provided with a flange portion 23b that protrudes radially outward from the outer surface on the rear end side, extends in the circumferential direction, and is connected in an annular shape.

  Here, for example, in the ejection nozzle 23 of the present embodiment, as shown in FIG. 3, when water (supply water) W2 pressurized and supplied to the nozzle hole 23a flows, the water W2 is ejected while swirling from the tip side. To do. Then, the water W2 ejected from the nozzle hole 23a so as to have a substantially rod-like shape gradually spreads in a trumpet shape due to the kinetic energy of the swirling, and splits at a certain position in the direction of the ejection center axis O3 of the water W2. Particles (water particle group) W1. Thereby, water W1 (W2) ejects from the ejection nozzle 23 in the shape of a mist. In the present embodiment, the split charging portion S is a position where the water W2 is split by the kinetic energy of the rotation to become the water particles W1.

  Next, the ejection nozzle mounting member 24 is formed in a substantially cylindrical shape, the diameter of the inner hole on the front end side is made substantially equal to the outer diameter of the ejection nozzle 23, and the diameter of the inner hole on the rear end side is made the second flow path. It is formed so as to be substantially the same as the outer diameter of the ejection nozzle mounting portion 31 of the forming member 22. The ejection nozzle mounting member 24 has a female screw 40 threaded on the inner surface of the inner hole on the rear end side.

  When the charged water particle shower forming means 11 of the present embodiment is assembled and formed integrally, first, the seal material mounting recess 29 of the first flow path forming member 21 and the second flow path forming member 22 is formed. , 34, and 35 are fitted with O-rings (seal materials) 41, and one end of the cylindrical water-side electrode portion 18 is fitted to the water-side electrode holding portion 33 of the second flow path forming member 22. Let

  Next, the other surface 21b of the first flow path forming member 21 and the second surface 21b are fitted to the water side electrode holding section 28 of the first flow path forming member 21 while the other end side of the water side electrode section 18 is fitted. The first flow path forming member 21 is attached so that the one surface 22a of the flow path forming member 22 is in surface contact and the central axes O1 and O2 are coaxially arranged. When the first flow path forming member 21 and the second flow path forming member 22 are thus arranged, the screw bolt insertion hole 30 of the first flow path forming member 21 and the female of the second flow path forming member 22 are arranged. The screw hole 36 communicates. The first flow path forming member 21 and the second flow path forming member 22 can be separated by screwing and screwing a screw bolt (not shown) into the female screw hole 36 while being inserted into the screw bolt insertion hole 30. To become one. Thereby, a water flow hole (water flow passage) 26 communicating from the end face of the pipe connection portion 27 of the first flow path forming member 21 to the end face of the ejection nozzle mounting portion 31 of the second flow path forming member 22 is formed, The water-side electrode portion 18 is disposed at a predetermined position in the water circulation hole 26.

  Next, the female screw 40 on the rear end side is screwed into the male screw 32 of the ejection nozzle mounting portion 31 of the second flow path forming member 22 so that the ejection nozzle mounting member 24 is connected to the second flow path forming member 22. It attaches to the ejection nozzle attachment part 31. At this time, the ejection nozzle 23 is fitted in the inner hole opened in the tip end surface of the ejection nozzle mounting member 24, and the ejection nozzle mounting member 24 is attached to the ejection nozzle mounting portion 31 so as to sandwich the flange portion 23b of the ejection nozzle 23. . Thereby, the ejection nozzle 23 is detachably fixed and attached to a predetermined position of the tip portion of the water circulation hole 26.

  Next, the three electrode fixing portions 38 are attached to the second flow path forming member 22. At this time, the electrode main body portion 19 of the induction electrode portion 17 in a state where the coupling portion 20 is inserted into the induction electrode insertion hole 37 of the second flow path forming member 22 is connected to the engagement recess 38 a at the other end of each electrode fixing portion 38. Engage with. Thus, the induction electrode portion 17 is fixed and supported by the three electrode fixing portions 38, and the induction electrode portion 17 is attached in this manner, and the ring-shaped electrode main body portion 19 is spaced from the ejection nozzle 23 at a predetermined interval. The center position is arranged coaxially with the nozzle hole 23 a of the ejection nozzle 23 and the water circulation hole 26.

  Further, a pipe from a pump unit (not shown) is connected to the pipe connection portion 27 of the first flow path forming member 21. Further, an earth cable is connected to the water-side electrode portion 18 to be grounded, and a voltage application cable (voltage application line) 42 is connected to the conductive member (electrode 17a) of the coupling portion 20 of the induction electrode portion 17 to apply this voltage. The induction electrode unit 17 is connected to the power source 43 via the cable 42 (see FIG. 4).

  In the charged water particle shower forming means 11 of the present embodiment configured as described above, when the pump unit is driven, the water W2 is supplied to the water circulation hole 26 of the ejection nozzle portion 16 through the pipe at a pressure of, for example, about 1 Mpa. Pressurized and supplied, ejected from the nozzle hole 23 a of the ejection nozzle 23.

  Further, when the water-side electrode portion 18 is grounded with an earth cable and a predetermined voltage of direct current (alternating current or pulsed) of, for example, several kV to several tens kV is applied to the induction electrode portion 17, A predetermined external electric field is formed. Then, the water W2 ejected from the nozzle hole 23a is split and separated in the split charging portion S to generate water particles (water particle group) W1, and the water particles W1 are charged by the electric field, and the charged water particles (charged water particles). Group) Ejected as W1. Incidentally, when a DC voltage is applied to the induction electrode unit 17, charged water particles W <b> 1 that are charged with either a positive charge or a negative charge are generated according to the polarity of the induction electrode unit 17. Further, when a voltage is applied in an alternating current or pulse form, charged water particles W1 that are selectively charged with a positive charge or a negative charge are generated according to the polarity of the induction electrode portion 17 that is alternately switched. In other words, positively charged charged water particles W1 and negatively charged charged water particles W1 can be selectively generated as appropriate.

  Further, at this time, in the charged water particle shower forming means 11 of the present embodiment, the voltage applied when generating the charged water particles W1 is set in the range of −20 kV to 20 kV. This applied voltage may be a predetermined constant voltage in the range of −20 kV to 20 kV, or may be varied in the range of −20 kV to 20 kV. When the applied voltage is in the range of −20 kV to 20 kV in this way, the generation of corona discharge is prevented, and the charged water particles W1 can be generated while ensuring safety.

  Further, in the charged water particle shower forming means 11 of the present embodiment, when the particle size of the water particles W1 generated by the charged water particle shower forming means 11 is smaller than 100 μm, the charged water generated by charging the water particles W1. The particles W1 are easily evaporated. In addition, when the particle size of the generated water particles W1 is larger than 300 μm, the number of charged water particles W1 that are generated and ejected by charging the water particles W1 with the charged water particle shower forming means 11 decreases. And in the charged water particle shower formation means 11 of this embodiment, it is comprised so that a particle size may produce | generate the water particle W1 of 100-300 micrometers, and when water W2 is pressurized and supplied from the pump unit at a pressure of about 1 Mpa, Charged water particles W1 having a diameter of about 200 μm are generated.

  Further, the charged water particle shower forming means 11 of the present embodiment generates 1 to 2 L / min of charged water particles W1. Here, FIG. 5 shows the relationship between the amount of charged water particles W1 sprayed by the charged water particle shower forming means 11 (≈the amount of water supplied to the charged water particle shower forming means 11) and the specific charge of the generated charged water particles W1. Show. As shown in FIG. 5, when the amount of sprayed water is set to 1 to 2 L / min, a necessary amount of sprayed water is secured to some extent, and the specific charge of the generated charged water particles W1 is 0.1 mC / kg or more. It has been confirmed that the charged water particles W1 can be reliably generated with this large specific charge.

  Further, in the charged water particle shower forming means 11 of the present embodiment, since the induction electrode portion 17 is formed by insulatingly covering the electrode 17a with the insulating material 17b, the induction electrode portion 17 is contacted with water and short-circuited. Charge neutralization does not occur, safety is ensured, and charged water particles W1 can be suitably generated.

  Further, Table 1 shows a case where the ejection flow rate (spray water amount) is 1 L / min, the applied voltage applied by the induction electrode unit 17 is +5 kV, the induction electrode unit 17 is formed without providing an insulating coating, and various insulating materials. The result of measuring the specific charge of the charged water particles W1 in the case where the induction electrode portion 17 is formed by insulating coating with 17b is shown. From this result, it was confirmed that when a polyamide synthetic resin (nylon: registered trademark) or polyethylene resin was used as the insulating material 17b, the specific charge was significantly reduced as compared with the case formed without providing the insulating coating.

  On the other hand, when polyvinyl chloride resin, polyphenylene sulfide resin (PPS), urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, alumina ceramics, and glass bottles are used as the insulating material 17b, an insulating coating is not provided. It was confirmed that the charged water particles W1 were generated with a specific charge equal to or higher than that of the case formed in the above. Therefore, in the charged water particle shower forming means 11 of the present embodiment, such a polyvinyl chloride resin, polyphenylene sulfide resin (PPS), urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, alumina By forming the induction electrode portion 17 using at least one of ceramics and glass bottles as the insulating material 17b, the charged water particles W1 can be suitably generated while preventing short circuit and charge neutralization.

  Then, as shown in FIG. 1, the charged water particle shower forming means 11 configured as described above is disposed, for example, supported by a lightweight steel truss of the roof structure 3 of the sealed waste disposal site 1 and charged. By generating and ejecting water particles W1 and dropping from the upper surface to the lower ground surface (waste layer), a charged water particle shower 10 such as a full cone type or a hollow cone type spreading in a trumpet shape is formed.

  At this time, for example, when a guide rail is attached to the roof structure 3 and the charged water particle shower forming means 11 is movably provided along the guide rail, any space in the sealed space 4 of the sealed waste disposal site 1 can be obtained. It becomes possible to form the charged water particle shower 10 at the position.

  Further, the charged water particle shower 10 may be formed by a plurality of charged water particle shower forming means 11. And when it comprises and comprises the some charged water particle shower formation means 11, the division | segmentation electrification part which the plurality of charged water particle shower formation means 11 charges while separating and separating the water particle W1 ejected from the nozzle hole 23a. It is preferable to arrange S on the same horizontal plane. In this way, when the plurality of charged water particle shower forming means 11 are installed with the split charging portion S positioned on the same horizontal plane, the electric field formed by the induction electrode portion 17 of the adjacent one of the charged water particle shower forming means 11. However, the charged water particles W1 can be suitably generated without interfering with the electric field formed by the induction electrode portion 17 of the other charged water particle shower forming means 11.

  Further, each of the plurality of charged water particle shower forming means 11 includes a pair of water-side electrode portions 18 and an induction electrode portion 17, and each of the charged water particle shower forming means 11 includes an induction electrode portion 17 and a power source 43. It is preferable to provide current limiting means 44 for each voltage application cable 42 to be connected. The current limiting means 44 is not particularly limited. For example, a current limiting resistor as shown in FIG. 4 or a current limiting circuit using a three-terminal active element such as a transistor or MOSFET may be used. It may be appropriately configured by using a constant current diode.

  Next, as shown in FIG. 1, the dust guiding unit 12 of the dust removal system A of the present embodiment is a suction device, and is directly below the charged water particle shower forming unit 11, that is, in the formation region of the charged water particle shower 10. Is provided. Then, the dust guiding means 12 sucks the internal air of the sealed waste disposal site 1 by driving to generate an air flow R in the sealed space 4 and forms the charged water particle shower 10 with the dust in the air. Guide into the area.

  Next, the water curtain forming means 14 of the present embodiment is provided with a plurality of ejection nozzles that are arranged in a row and that eject while generating water particles. The water curtain forming means 14 forms a series of water curtains 13 while water particles ejected from a plurality of ejection nozzles fall downward from above. In this embodiment, the water curtain 13 is formed by spraying fine water particles having an average particle diameter of 30 to 500 μm from each ejection head. Similarly to the charged water particle shower forming means 11, for example, the water curtain forming means 14 is provided with a guide rail attached to the roof structure 3 so as to be movable along the guide rail. 4 can be formed at an arbitrary position within 4.

  Here, the water curtain forming means 14 may include a plurality of charged water particle ejection heads, and may be configured to form the water curtain 13 with the charged water particles. Further, the water curtain 13 may be formed by flowing water from the upper side to the lower side in the sealed space 4.

  When removing dust with the dust removal system A of the sealed waste disposal site of the present embodiment having the above-described configuration, first, the pump unit is driven, and the charged water particle shower forming means 11 performs the charged water particle W1. Is formed and ejected to form a charged water particle shower 10 that spreads in a trumpet shape from above to below the ground surface.

  When the charged water particle shower 10 is formed in this way, dust (particles) floating in the air in the formation region of the charged water particle shower 10 is electrically adsorbed on the charged water particles W1, and together with the charged water particles W1. Dropped on the ground surface and removed.

  Further, at this time, when the suction device of the dust guiding unit 12 is driven, the air in the sealed space 4 of the sealed waste disposal site 1 is sucked into the dust guiding unit 12 and an air flow R is generated in the sealed space 4. The Further, since the dust guiding means 12 is disposed directly below the charged water particle shower forming means 11, an air flow R flowing toward the charged water particle shower 10 is generated in the sealed space 4. As a result, the dust floating in the sealed space 4 is sequentially forcibly guided into the formation area of the charged water particle shower 10 by the air flow R, and is adsorbed and captured by the charged water particles W1 and falls to the air. It will be removed from inside.

 Further, even if the dump truck travels, the waste 5 is dumped from the dump truck, or the water is not sprinkled by a dust generation source that performs operations such as turning over the waste 5 by heavy machinery, The flow R is generated, and the dust in the sealed space 4 can be removed by sequentially guiding and collecting the distant dust in the formation region of the charged water particle shower 10. For this reason, it is not necessary to frequently move the dust removal system A (the charged water particle shower forming means 11 or the like) of the sealed waste disposal site according to the position of the dust generation source.

  Furthermore, in this embodiment, since the water curtain 13 is formed outside the charged water particle shower 10 by the water curtain forming means 14, dust floating in the air adheres to the water particles of the water curtain 13 and is captured. It drops on the surface and is removed. For this reason, by providing the water curtain forming means 14 together with the charged water particle shower forming means 11, dust is efficiently removed from the air.

  Here, conventionally, in the sealed waste disposal site 1, rain is artificially generated inside, the leachate W3 is forcibly generated from the waste 5 that has been deposited, and harmful substances separated from the waste 5 are removed. In some cases, the waste 5 is sequentially purified by collecting the leachate W3 contained in the drainage pipe into the drainage pit for processing.

  In contrast, in the dust removal system A of the sealed waste disposal site of the present embodiment, when the charged water particle shower forming means 11, the water curtain forming means 14, and the dust guiding means 12 are configured to be movable, dust is captured. It is also easy to allow the water W4 of the water curtain 13 formed by the water curtain forming means 14 and falling to the ground surface to flow in the region P where the charged water particle shower 10 falls. Thereby, first, the water W4 of the water curtain 13 prevents the dust falling on the ground surface from drying and diffusing again into the air. Further, when the water W4 of the water curtain 13 is collected in the region P where the charged water particle shower 10 falls, the water W4 can be permeated into the waste 5 (waste layer) and used as the leachate W3. It becomes possible. For this reason, by arranging the dust removal system A of the sealed waste disposal site so as to form the charged water particle shower 10 and the water curtain 13 in the area where the purification treatment is delayed, the waste 5 is removed together with the removal of the dust. The purification process can be performed at the same time.

  In addition, by controlling the position of the charged water particle shower forming means 11, the water curtain forming means 14, the dust guiding means 12, the flow direction (spouting direction) of the charged water particle shower 10 and the water curtain 13, etc. It is desirable not to let water go. For example, wetting the dump truck's road with water will cause inconveniences such as soiling the road surface of the general road when going out of the road to the general road. It is desirable to keep it.

  In addition, air flow confirmation means (not shown) such as an air blower or a soap bubble tracer generator is installed at an appropriate location in the sealed waste disposal site, and after confirming the state of the air flow R in the sealed space 4, The positions of the charged water particle shower forming means 11, the water curtain forming means 14, the dust guiding means 12, etc. may be determined. That is, the air flow R in the sealed space 4 can be visualized by capturing the behavior of the windsock and the behavior of the soap bubbles generated from the soap ball tracer generator. Thereby, for example, a place where the dust concentration becomes high in advance, such as a stagnation region of the air flow R, can be specified. Therefore, the charged water particle shower forming means 11, the water curtain forming means 14, and the dust guide By providing the means 12, more efficient dust removal can be performed.

  Therefore, in the dust removal system A of the sealed waste disposal site of the present embodiment, the charged water particle shower forming means 11 provided in the sealed space 4 of the sealed waste disposal site 1 charges from below to above. The charged water particle shower 10 formed by watering the water particles W1 can be formed. When the charged water particle shower 10 is formed in this way, dust suspended in the air in the region where the charged water particle shower 10 is formed can be electrically adsorbed and captured by the charged water particles W1, and charged water can be captured. It becomes possible to drop the dust together with the particles W1 from the air. That is, dust can be supplemented by the action of Coulomb force and / or gradient force acting between the charged water particles W1 and dust (particles).

  At this time, air is sucked by the dust guiding means 12 to generate an air flow R in the sealed space 4, thereby forcibly guiding the dust in the sealed space 4 in the formation region of the charged water particle shower 10. It becomes possible to make it. Thereby, it becomes possible to efficiently capture and remove dust from the air with the charged water particles W1.

  Therefore, according to the dust removal system A of the sealed waste disposal site of this embodiment, the dust generated in the sealed space 4 of the sealed waste disposal site 1 can be efficiently and compared with the conventional simple watering. It can be effectively removed.

  Further, in the dust removal system A of the sealed waste disposal site of the present embodiment, the outside of the charged water particle shower 10 appropriately selected according to the air flow direction in the sealed space 4 generated by the dust guiding means 12. By forming the water curtain 13 by the water curtain forming means 14 at the position, the water curtain 13 together with the charged water particle shower 10 formed by the charged water particle shower forming means 11 captures dust in the air. It becomes possible to remove from. Thereby, dust can be more efficiently removed by the two means including the charged water particle shower forming means 11 and the water curtain forming means 14.

  Furthermore, by providing an air flow confirmation means such as a windsock or a soap bubble tracer generator, the air flow R in the sealed space 4 is visualized and the state of the air flow in the sealed space 4 is confirmed. be able to. For example, by providing the charged water particle shower forming means 11, the water curtain forming means 14, and the dust guiding means 12 in the stagnation region of the air flow R, dust can be more efficiently removed.

  Furthermore, in the dust removal system A of the sealed waste disposal site of the present embodiment, the charged water particle shower forming means 11 includes the ejection nozzle part 16, the induction electrode part 17, and the water side electrode part 18. As a result, the water particles W2 generated by the ejection nozzle unit 16 can be charged by the electric field formed by the induction electrode unit 17, and the charged water particles W1 can be generated and ejected easily and reliably.

In addition, in the case where a plurality of charged water particle shower forming means 11 are provided, it is conceivable that the water-side electrode portion 18 for providing a reference potential is shared by the plurality of charged water particle shower forming means 11. When the water-side electrode unit 18 is used by a plurality of charged water particle shower forming means 11, the charging efficiency of the charged water particles W1 (charged water particle group) generated by each charged water particle shower forming means 11 is lowered.
On the other hand, when each charged water particle shower forming means 11 includes the water-side electrode portion 18 as in the present embodiment, the charged water particles W1 having a desired specific charge can be reliably generated. This makes it possible to remove dust suspended in the air reliably and efficiently.

Further, when the particle size of the water particles generated by the charged water particle shower forming means 11 is smaller than 100 μm, the charged water particles W1 after the water particles are charged easily evaporate, and the dust removing effect is exhibited. It will disappear. Further, if the particle size of the generated water particles is larger than 300 μm, the number of charged water particles W1 that are generated and ejected by charging the water particles with the charged water particle shower forming means 11 is reduced. The removal effect will not be fully demonstrated.
On the other hand, in the present embodiment, the charged water particle shower forming means 11 generates water particles having a particle size of 100 to 300 μm, so that the particle size is 300 μm or less and further finer by the action of Coulomb force. By generating the split charged water particles W1 having various particle sizes, it is possible to more reliably and effectively remove dust suspended in the air.

  Moreover, it can prevent that a corona discharge generate | occur | produces by making the voltage applied when the charged water particle shower formation means 11 produces | generates the charged water particle W1 by an induction charging system into the range of -20kV-20kV.

  Further, the induction electrode portion 17 of the charged water particle shower forming means 11 to which a high voltage is applied to charge the water particles is formed by insulatingly covering the electrode 17a, thereby preventing the occurrence of electrical short circuit and discharge. can do.

  At this time, as the insulating material 17b for insulatingly covering the electrode 17a of the induction electrode portion 17 for charging the water particles, polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluorotrifluoro By using ethylene resin, ceramics, and soot, it becomes possible to generate charged water particles W1 having a specific charge equal to or higher than that of the charged water particles W1 generated by the electrode 17a not covered with insulation.

Furthermore, in the case where a plurality of charged water particle shower forming means 11 are provided, considering that the dust removal system A is rationally configured, the induction electrode portion of the plurality of charged water particle shower forming means 11 by one power source 43. A voltage is applied to 17. In this case, for example, when a short circuit occurs on one charged water particle shower forming means 11 side, a short circuit also occurs on the other charged water particle shower forming means 11 side.
On the other hand, when the current limiting means 44 is provided in each of the plurality of voltage application lines 42 connecting the induction electrode portions 17 of the plurality of charged water particle shower forming means 11 and the power source 43 as in the present embodiment. Even if a short circuit occurs in one charged water particle shower forming unit 11, the current flowing to the other charged water particle shower forming unit 11 is limited, and a short circuit is prevented from occurring in the other charged water particle shower forming unit 11. be able to.

  Further, by generating the charged water particles W1 of 1 to 2 L / min by the charged water particle shower forming means 11, 0.1 mC / kg is secured while ensuring the required water supply amount (sprayed water amount) of the charged water particles W1 to some extent. The charged water particles W1 having the above high specific charge can be stably generated, and the dust suspended in the air can be removed reliably and effectively.

  As mentioned above, although one Embodiment of the dust removal system of the enclosed waste disposal site which concerns on this invention was described, this invention is not limited to said one Embodiment, It changes suitably in the range which does not deviate from the meaning. Is possible.

For example, in the present embodiment, the charged water particle shower 10 is formed by the charged water particle shower forming means 11, and the dust (particles) suspended in the air in the formation region of the charged water particle shower 10 is electrically converted to the charged water particles W 1. In the above description, dust is efficiently removed from the air by trapping and trapping.
On the other hand, in the dust removal system of the sealed waste disposal site of the present invention, the water particles are formed from uncharged water particles which are dispersed from above in the sealed space while generating water particles by the water particle shower forming means. You may make it remove dust from the air by forming a water particle shower and adsorb | sucking and capturing the dust which floated in the formation area of a water particle shower by a water particle. Even in this case, it is possible to efficiently and effectively remove the dust generated in the sealed space of the sealed waste disposal site as compared with the conventional simple watering.

  In the present embodiment, the dust guiding means 12 is a suction device, and is disposed immediately below the charged water particle shower forming means (water particle shower forming means) 11. The dust guiding means generates an air flow R in the sealed space 4, and induces dust floating in the air of the sealed space 4 in the formation region of the charged water particle shower (water particle shower) 10 by the air flow R. If possible, the configuration is not particularly limited.

  For this reason, for example, even when a suction device is used as the dust guiding means as in the present embodiment, it is not disposed directly under the charged water particle shower forming means 11 and in the formation region of the charged water particle shower 10. May be.

  In addition, the air flow R is intentionally generated in the sealed space 4 by opening / closing the open / close door 6 provided in the closed waste disposal site 1 and driving a ventilation fan for introducing outside air or a ventilation fan for exhausting internal air. Since they can be generated, they may be applied as dust guiding means.

1 Sealed Waste Disposal Site 2 Side Wall 3 Roof Structure 4 Sealed Space 5 Waste 6 Openable Door 10 Charged Water Particle Shower (Water Particle Shower)
11 Charged water particle shower forming means (water particle shower forming means)
DESCRIPTION OF SYMBOLS 12 Dust guidance means 13 Water curtain 14 Water curtain formation means 16 Ejection nozzle part 17 Induction electrode part 17a Electrode 17b Insulating material 18 Water side electrode part 18a Electrode 19 Electrode main part 20 Connection part 21 1st flow path formation member 21a One surface 21b Other surface 22 Second flow path forming member 22a One surface 22b Other surface 23 Jet nozzle 24 Jet nozzle mounting member 26 Water flow hole 27 Pipe connection portion 28 Water-side electrode holding portion 29 Sealing material mounting recess 30 Screw bolt insertion hole 31 Jet Nozzle mounting portion 32 Male screw 33 Water-side electrode holding portion 34 Sealing material mounting recess 35 Sealing material mounting recess 36 Female screw hole 37 Induction electrode insertion hole 38 Electrode fixing portion 38a Engaging recess 40 Female screw 41 Sealing material 42 Voltage application Pressure line 43 Power supply 44 Current limiting means A Dust removal system O1 in the enclosed waste disposal site Center axis O2 Center axis O3 Spout center R airflow S division charging unit W1 charged water particles (water particles)
W2 water (supply water)
W3 Leachate W4 Water curtain water

Claims (13)

A system for removing dust generated in an enclosed space of an enclosed waste disposal site,
Water particle shower forming means for forming a water particle shower by spraying from above in the sealed space while generating water particles;
Arranged in the formation region of the water particle shower, generates an air flow in the sealed space, and induces dust floating in the air of the sealed space in the formation region of the water particle shower by the air flow. Dust guiding means ;
A water curtain forming means that is disposed outside the water particle shower, and causes water to flow downward from above in the sealed space, or jets water particles from above in the sealed space to form a water curtain;
Equipped with a,
The water particle shower forming means and the water curtain forming means are configured to be movable,
The water particle shower forming means and the water curtain forming means can be arranged so that water of the water curtain formed by the water curtain forming means flows into a region where the water particle shower falls. Dust removal system for sealed waste disposal sites.
In the dust removal system of the enclosed waste disposal site according to claim 1,
The dust removing system for a sealed waste disposal site, wherein the dust guiding means is a suction device provided directly below the water particle shower forming means.
In the dust removal system of the enclosed waste disposal site according to claim 1 ,
Dust floating in the air is trapped by water particles in the water curtain and dropped on the ground surface, and re-diffusion of the dropped dust is prevented by the water curtain water falling on the ground surface and flowing into the area. A dust removal system for sealed waste disposal sites.
In the dust removal system of the enclosed waste disposal site according to claim 1 ,
The sealed waste disposal site is characterized in that the water that has flowed into the area penetrates the accumulated waste, separates harmful substances from the waste, and collects and treats leachate containing the harmful substances. Dust removal system.
In the dust removal system of the closed-type waste disposal site according to any one of claims 1 to 4 ,
A dust removal system for an enclosed waste disposal site, comprising air flow confirmation means for confirming the state of air flow in the enclosed space.
In the dust removal system of the enclosed waste disposal site according to any one of claims 1 to 5 ,
The water particle shower forming means generates water particles, charges the water particles by an induction charging method, generates charged water particles, and sprays from above in the sealed space to form a charged water particle shower. A dust removal system for a closed-type waste disposal site, which is a means for forming a water particle shower.
In the dust removal system of the enclosed waste disposal site according to claim 6 ,
The charged water particle shower forming means includes an ejection nozzle unit that produces the water particles while ejecting pressurized water.
A predetermined voltage is applied to form a predetermined electric field, and the water particles generated by the ejection nozzle portion are charged by the electric field to form the charged water particles; and
A dust-removing system for a closed-type waste disposal site, comprising a water-side electrode unit that provides a reference potential for a voltage applied to the induction electrode unit.
In the dust removal system of the enclosed waste disposal site according to claim 6 or 7 ,
The charged water particle shower forming means is configured to generate the water particles having a particle diameter of 100 to 300 μm, and is a dust removal system for an enclosed waste disposal site.
In the dust removal system of the closed-type waste disposal site according to any one of claims 6 to 8 ,
The dust removal system for a sealed waste disposal site, wherein a voltage applied when the charged water particles are generated by the charged water particle shower forming means is in a range of -20 kV to 20 kV.
In the dust removal system of the enclosed waste disposal site according to any one of claims 6 to 9 ,
An induction electrode portion of the charged water particle shower forming means for applying a predetermined voltage to form a predetermined electric field and charging the water particles by the electric field to form the charged water particles insulates the electrode. A dust removal system for a closed-type waste disposal site characterized by being formed.
In the dust removal system of the closed-type waste disposal site according to any one of claims 6 to 10 ,
Comprising a plurality of charged water particle shower forming means,
A predetermined voltage is applied to form a predetermined electric field, and the water particles are charged by the electric field to form the charged water particles. A dust removal system for a sealed waste disposal site, wherein each of a plurality of voltage application lines connecting a power source for applying a predetermined voltage is provided with a current limiting means.
In the dust removal system of the closed-type waste disposal site according to any one of claims 6 to 11 ,
The dust removal system for a sealed waste disposal site, wherein the charged water particle shower forming means is configured to generate the charged water particles of 1 to 2 L / min.
In the dust removal system of the enclosed waste disposal site according to claim 10 ,
The induction electrode part is formed by insulatingly coating the electrode with at least one kind of insulating material such as polyvinyl chloride resin, polyphenylene sulfide resin, urethane resin, polytetrafluoroethylene resin, polychlorotrifluoroethylene resin, ceramics, and soot. A dust removal system for a closed-type waste disposal site.

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