JP2022175578A - Dental therapy wastewater treatment system and wastewater treatment method thereof - Google Patents

Abstract

To provide a dental therapy wastewater treatment system highly efficiently recovering metals from dental therapy wastewater by improving sedimentation efficiency of the metals without reducing flow velocity of the dental therapy wastewater and easily detachably attached to a unit of the dental therapy wastewater treatment system.SOLUTION: A dental therapy wastewater treatment system includes a vacuum tip 53 for sucking filth generated during dental therapy such as teeth, metal powder, resin cuttings, saliva, blood, flesh fragments and medical agents, and wastewater including wash water with a dental suction device 55, a sediment sedimentation/recovery device 11 for changing the flow of wastewater and air sucked by the vacuum tip 53 into a downward spiral shape and sedimenting and recovering metal powder and tooth pieces contained in the wastewater, a separator 56 for separating the wastewater sucked by the sediment sedimentation/recovery device 11 into sludge and the wastewater containing non-sedimented metal powder, and a metal recovery device 59 for recovering the metal powder from the wastewater separated by the separator 56.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a dental treatment wastewater treatment system and a wastewater treatment method for separating waste and wastewater produced during dental treatment and recovering metals from the wastewater.

The dental chair unit 51 includes, as shown in the schematic diagram of FIG. A vacuum tip (suction device) 53 for sucking the oral cavity and an extra-oral vacuum 54 for sucking debris outside the oral cavity during treatment are provided. The spittoon 52, the vacuum tip 53, and the extra-oral vacuum 54 suck dirt such as cuttings, tooth fragments, saliva, blood, flesh fragments, drugs, and washing water generated during dental treatment.

The vacuum tip 53 is a suction device inserted into the oral cavity, which is connected to a dental suction device (pump) 55 via a hose, filter, waste water separator, etc., and sprays cooling water sprayed into the oral cavity, cuttings, and saliva. It is a device that sucks and discharges blood and various germs present in the oral cavity. As a countermeasure against contamination, large particles such as cuttings are captured and removed by a filter, gas and water are separated by a separator 56 and a vacuum motor 57, and discharged to a drain pipe 58. In some cases, the water may be purified by a purification device before being discharged to the drain pipe 58 before being discharged.

The tooth pieces and metal powder sucked from the vacuum tip 53 contain expensive precious metals such as platinum, gold, silver, palladium, and titanium, which are filling materials for teeth. In the past, these were discarded together with tooth fragments, etc., but now, mainly precious metals are collected from the viewpoint of wasting resources. Techniques have therefore been proposed for recovering precious metals from cuttings produced during such dental treatment. For example, as in Japanese Patent Laid-Open No. 2006-15057 "Dental Treatment Waste Processing System and Sludge Reservoir" of Patent Document 1, an intraoral suction terminal device for sucking waste generated during dental treatment in the oral cavity, and this intraoral suction terminal. A sludge collecting device to be attached to a dental treatment waste treatment system comprising a purifying device and a discharge unit for sending out the dental treatment waste sucked by the device to sewage, etc., and is set at an installation site of the dental treatment waste treatment system. a container body for storing the sludge to be collected; an introduction port provided on the upper side of the container body for introducing the filth generated during dental treatment into the container body; A sludge storage device has been proposed, which has a discharge port for discharging dirty water from which sludge has been removed, and removes the sludge stored in the container body from the installation site of the dental treatment generated waste treatment system and recovers it.

JP-A-2006-15057

According to the above-mentioned "Dental Waste Disposal System and Sludge Reservoir" of Patent Literature 1, it is possible to remove sludge of waste such as cuttings, tooth fragments, saliva, blood, meat fragments, drugs, and washing water. However, since this sludge is taken out in a state in which it contains precious metals, there is a problem that it is difficult to judge how much precious metals have been collected in this sludge collecting device only by visual inspection.

In addition, the sludge contains resins, hard resins, ceramics, and other substances that are difficult to separate from the precious metals used in the treatment, making it difficult to efficiently extract only the precious metals from this sludge. rice field. A system having a metal collector 59 for collecting metals (metal powder) after the separator 56 has also been proposed. However, the conventional metal collector 59 collects the metal powder by settling it, but if the flow velocity is increased, the settling rate of the metal powder decreases and the metal powder is drained before it settles sufficiently. Conversely, if the flow velocity is slowed down, the sedimentation rate of the metal powder increases, but there is the problem that the throughput decreases.

The present invention has been created to solve such problems. That is, an object of the present invention is to improve the sedimentation efficiency of metals without reducing the flow rate of dental treatment wastewater, so that metals can be efficiently recovered from dental treatment wastewater, and a dental treatment wastewater treatment system is provided. To provide a dental treatment wastewater treatment system which can be easily and detachably attached to a unit of a dental treatment.

The dental treatment wastewater treatment system of the present invention is a dental treatment wastewater treatment system for recovering metal powder from filth and cleaning water generated during dental treatment in a dental chair unit (51),
a vacuum tip (53) for sucking teeth, metal powder, resin cuttings, saliva, blood, meat pieces, filth such as medicines, and wastewater containing wash water generated during dental treatment with a dental suction device (55);
A sediment sedimentation separation collector ( 11) and
a separator (56) for separating the waste water sucked by the sediment sedimentation separation collector (11) into sludge and waste water containing metal powder that was not sedimented and separated;
and a metal recovery device (59) for recovering metal powder from the wastewater separated by the separator (56).

For example, the sediment sedimentation separation collector (11)
a bottle (12) for settling and recovering the sediment containing the metal powder;
A hemispherical cap portion (13) detachably attached to the upper portion of the bottle (12);
an inlet (14) for taking in waste water and an outlet (15) for discharging waste water attached to the cap (13);
a baffle plate (16) that impinges and changes the direction of flow of wastewater coming from the inlet (14) with air;
The baffle plate (16) is attached so as to be horizontally inclined with respect to the axial direction of the inflow direction of the inlet (14).

For example, the bottom of the bottle (12) is provided with an opening/closing lid (17) for taking out the sediment deposited here.
A guide ridge (18) is formed on the baffle plate (16) on the inlet (14) side to regulate the flow of wastewater and air.
The baffle plate (16) may be curved so as to protrude toward the discharge port (15).

The wastewater treatment method of the present invention is a dental treatment wastewater treatment method for recovering metal powder from filth and washing water generated during dental treatment in a dental chair unit (51),
Intake (14) and discharge (15) of the cap portion (13) allow waste water containing tooth, metal, resin cuttings, saliva, blood, meat pieces, drugs, and cleaning water generated during dental treatment. aspirated into a bottle (12) having
The waste water is caused to collide with air against a baffle plate (16) provided in the cap portion (13) to guide the flow of the waste water by changing it into a downward spiral shape,
The waste water stays longer in the bottle (12) from the inlet (14) of the cap (13) to the outlet (15) to precipitate solids. It is characterized by

In the dental wastewater treatment system of the present invention, the sediment sedimentation separator (11) mounted between the vacuum tip (53) and the separator (56) swirls the sucked wastewater and air flow downward. To form, the sedimentation separation distance (time) can be increased. As a result, the separation efficiency between the filth that flows as it is and the metal powder that settles is increased. Expensive precious metals such as platinum, gold, silver, palladium, and titanium can be efficiently recovered from this sediment. Since the sediment sedimentation separation collector (11) has a compact structure, it can be easily retrofitted to the separator (56), and can be easily incorporated into existing drainage facilities.
When solid matter such as metal powder accumulates in the bottle (12), the bottle (12) is removed from the cap portion (13), the waste water in it is discarded, and the solid matter deposited on the opening/closing lid (17) is removed. to recover. At this time, human hands do not directly touch the waste water, so the waste water can be handled hygienically. It is possible to contribute to measures against infectious diseases.

The baffle plate (16) installed at an angle in the hemispherical cap part (13) forms the flow of waste water and air in a downward spiral, so that the sedimentation separation distance (time) of the waste water becomes long. , can increase the separation efficiency.

Since the bottle (12) is provided with an opening/closing lid (17) for taking out the sediment deposited on the bottom thereof, the sediment can be easily recovered.
The baffle plate (16) is provided with guide ridges (18) for regulating the flow of waste water and air. It hits the guide ridge (18) of the attached baffle plate (16), flows downward and along the direction of the guide ridge (18), is likely to be formed in a spiral shape, and sedimentation separation distance (time) increases, Higher separation efficiency.
The curved baffle plate (16) can prevent turbulence in the flow of waste water and air, and improve the separation efficiency.

In the dental treatment wastewater treatment system of the present invention, the wastewater and air flow are formed in a downward spiral, so that the sedimentation separation distance (time) is long and the separation efficiency is high. A large amount of wastewater can be treated quickly, and metals and precious metals can be efficiently recovered from the wastewater.

1 is a schematic configuration diagram showing a dental treatment wastewater treatment system and a dental chair unit of Example 1. FIG. It is a front view which shows a sediment sedimentation separation collector. Fig. 2 is a vertical cross-sectional view showing a sediment sedimentation separation collector; It is a top view of a cap part. It is a bottom view of a cap part. FIG. 3 is an explanatory perspective view for explaining the flow of wastewater in the sediment sedimentation separation and recovery device; It is an explanatory diagram of the flow of wastewater and the state of treatment, (a) is a state in which wastewater is flowing, (b) is a state in which the flow of wastewater is stopped, and (c) is a state in which the bottle and the open/close lid are removed. be. FIG. 11 is a longitudinal sectional view of a cap portion showing a state in which a guiding ridge for regulating the flow of waste water is formed on the baffle plate of Modification 1; FIG. 11 is a vertical cross-sectional view of the cap portion showing a state in which the baffle plate of Modification 2 is curved. 1 is a schematic configuration diagram showing a conventional dental treatment wastewater treatment system; FIG.

The dental treatment wastewater treatment system of the present invention is a system that separates filth and wastewater produced during dental treatment and recovers metals from this wastewater.

Preferred embodiments of the present invention will now be described with reference to the drawings.
<Configuration of dental wastewater treatment system>
FIG. 1 is a schematic configuration diagram showing a dental treatment wastewater treatment system and a dental chair unit of Example 1. FIG.
The dental chair unit 51 includes a chair on which the patient sits, a foot switch for operating the chair with the foot, an auxiliary table for placing instruments, medicines, etc., a spittoon (mouth wash table 52) for gargling, a light arm for a shadowless light, In addition, it is equipped with washing water, cooling water, and drainage pipes. The dental treatment wastewater treatment system of the present invention is a device provided in this drainage facility.

The dental treatment wastewater treatment system of Embodiment 1 includes a vacuum chip 53 used for dental treatment, and the wastewater sucked by the vacuum chip 53 is turned downward to remove deposits such as metal powder and tooth fragments. A sediment sedimentation separation collector 11 for sedimentation and recovery, and a separator 56 for separating the waste water sucked by the sediment sedimentation separation collector 11 into sludge and waste water containing metal powder that has not been sedimented and separated. and a metal recovery device 59 for recovering metals from the waste water separated by the separator 56 . The metal powder contained in the wastewater is recovered in two stages, the sediment sedimentation separation recovery device 11 , the separator 56 and the metal recovery device 59 .

The vacuum tip 53 is placed in the oral cavity of the patient and used to suction teeth, metals, cuttings of resin, saliva, blood, pieces of meat, drugs, and filth such as washing water generated during dental treatment. This suction uses a dental suction device 55 .

The separator 56 removes sludge and liquid containing metal powder ( waste water). Operation of this separator 56 is by a vacuum motor 57 .

The metal recovery device 59 is a device for recovering metals from the wastewater separated by the separator 56 . This is a device for recovering metal powder that could not be recovered by the sediment sedimentation separation recovery device 11 . The metal collector 59 is composed of a collector main body and a lid (not shown), and the collector main body 12 is a housing having an upper opening. The lid 13 is a member that detachably closes the opening of the collector body 12 .

<Configuration of sediment sedimentation separation and recovery device>
FIG. 2 is a longitudinal sectional view showing a sediment sedimentation separation collector. FIG. 3 is a plan sectional view showing a sediment sedimentation separation collector.
The sediment sedimentation separation collector 11 is detachably attached between the vacuum chip 53 and the separator 56 . The sediment sedimentation separation collector 11 is a device comprising a bottle 12 for sedimentation collection of sediment containing metal powder, and a hemispherical cap portion 13 detachably attached to the top of the bottle 12 . A vacuum chip 53 is connected to its upstream side, and a separator 56 is connected to its downstream side. Each connecting means can be easily and detachably connected. It is designed to be retrofitted to conventional dental treatment wastewater treatment systems.

The cap portion 13 is provided with an intake port 14 for taking in waste water, a discharge port 15 for discharging waste water, and a baffle plate 16 . This baffle plate 16 has the function of changing the flow direction of the waste water and air flowing from the intake port 14 .

The bottle 12 is a cylindrical temporary collection container. As will be described later, the bottle 12 preferably has a cylindrical shape so that the wastewater forms a spiral shape in order to lengthen the residence time of the wastewater, i.e., sedimentation separation time. Moreover, a transparent material is preferable so that the internal state can be confirmed from the outside.

An opening/closing lid 17 is provided at the bottom of the bottle 12 . By removing the opening/closing lid 17, the deposited sediment can be taken out.

<Structure of Cap>
FIG. 4 is a plan view showing the cap portion. FIG. 5 is a bottom view showing the cap portion.
The cap portion 13 has an inlet 14 for taking in waste water and air on one side of the hemispherical shape, and an outlet 15 for discharging waste water and air on the opposite side. The intake port 14 is connected to the downstream side of the vacuum chip 53 . The outlet 15 is connected upstream of the separator 56 . This connection can be easily detachably connected.

A baffle plate 16 is attached to the cap portion 16 so that the wastewater and air flowing from the intake port 14 come into contact with each other and change the direction of flow. As shown in the cross-sectional view of FIG. 3, the baffle plate 16 is formed by attaching a semicircular plate material to match the hemispherical cap portion 13 . The wastewater taken in from the inlet 14 is dropped into the bottle 12 from the lower side of the baffle plate 16.例文帳に追加

The baffle plate 16 is horizontally inclined with respect to the axial direction of the intake port 14 in the inflow direction. This obliquely mounted baffle 16 functions to turn waste water and air impinging thereon into a downward spiral within the bottle 12 . It does not merely drop wastewater from top to bottom in a cylindrical bottle 12, but has a function of changing the wastewater and air into a spiral flow in the cylindrical bottle 12 to slow down the flow velocity. In other words, the flow path distance of the wastewater becomes longer. As a result, the sedimentation separation distance (time) is lengthened, so that the efficiency of separation of solids such as filth and metal powder can be enhanced.

For example, as shown in FIG. 5, a baffle plate 16 is arranged in the cap portion 13 at an angle of 45 degrees in the horizontal direction. The reason for the slanting arrangement is to prevent waste water and air flowing in straight from hitting the baffle plate 16 and rebounding. It is also for forming the flow of waste water in a downward spiral with the air.

The angle of inclination is not limited to 45 degrees as long as the baffle plate 16 can form a downward spiral of wastewater flow. Anything that can change the course direction without disturbing the laminar flow of waste water and air traveling straight may be used. This angle can be changed as appropriate. Also, although not shown, the baffle plate 16 can be attached in the cap portion 13 so that the angle in the horizontal direction can be changed as needed. As a matter of course, it is necessary to adjust the angle within a range that does not interfere with the intake port 14 and the discharge port 15 .

<Description of sediment sedimentation separation and recovery device>
FIG. 6 is an explanatory perspective view for explaining the flow of waste water in the sediment sedimentation separation collector.
(1) The waste water flowing into the intake port 14 of the sediment sedimentation separation collector 11 configured in this manner includes teeth, metal powder, resin cuttings, saliva, blood, meat pieces, medicines, etc. generated during dental treatment. waste water containing filth and wash water. At this time, as shown in the figure, the wastewater sucked into the separator 56 flows downward in the pipe, and air is simultaneously sucked above it. The wastewater and air that have flowed into the intake port 14 hit the baffle plate 16 inside the cap portion 13 .
(2) The baffle plate 16 is arranged at an angle inclined horizontally with respect to the axial direction of the intake port 14 in the inflow direction. The direction of flow of the waste water and air hitting the baffle plate 16 is changed.
(3) Waste water is guided into the cylindrical bottle 12 below the cap portion 13 . This wastewater changes into a spiral flow downward in the cylindrical bottle 12 because it contains the solid matter and the flow direction is changed. At this time, the flow direction of the air is also changed, so the waste water tends to form a spiral flow.
(4) In the wastewater that has changed into a spiral flow, solids such as metal powder and tooth fragments with high specific gravity settle down and are deposited on the opening/closing lid 17 as they are.
(5) When the amount of sediments in the bottle 12 reaches a predetermined amount, the bottle 12 is removed from the cap portion 13 and the waste water therein is discarded. Human hands do not come into direct contact with the wastewater. The opening/closing lid 17 is removed from the bottle 12, and the solid matter containing the metal powder is taken out.
Waste water containing sludge with a low specific gravity is discharged from the discharge port 15 .
(6) Remove the bottle 12 from the cap portion 13 and discard the waste water therein. Next, when collecting the solid matter deposited on the opening/closing lid 17, human hands do not directly touch the wastewater, so that the wastewater can be handled hygienically. It is possible to contribute to measures against infectious diseases.

FIG. 7 is an explanatory diagram of the flow of wastewater and the state of treatment. It is in a state of
When the waste water is sucked into the sediment sedimentation separation collector 11 and flows into the cap portion 13 and the bottle 12, as shown in FIG. 7(a). At this time, the water surface of the wastewater reaches a height slightly below the opening of the bottle 12 . This is because the waste water sucked into the separator 56 flows under the pipe of the intake 14, and air is sucked and flows above the pipe at the same time.
As shown in FIG. 6, among the waste water passing through the bottle 12, the waste water with high specific gravity settles, and the waste water with low specific gravity is discharged to the discharge port 15 as it is.

Next, when the suction is stopped, as shown in FIG. Waste water is only in the bottle 12. Even if the bottle 12 is removed from the cap portion 13 in this state, the waste water in the bottle 12 does not spill, and the waste water can be hygienically treated.

Finally, as shown in FIG. 7(c), after the waste water in the bottle 12 is discarded, the opening/closing lid 17 can be removed to easily recover the sediment containing precious metals deposited therein. Also at this time, the sediment can be hygienically recovered.

<Modification 1 of the baffle plate of the sediment sedimentation separation and recovery device>
FIG. 8 is a vertical cross-sectional view of the cap portion showing a state in which the baffle plate of Modification 1 is provided with a guide ridge for regulating the flow of waste water and air.
The baffle plate 16 of Modification 1 is formed with a guide ridge 18 for regulating the flow of waste water and air. By forming the guide ridges 18 in this way, the waste water and air flowing in from the intake port 14 hit the guide ridges 18 of the baffle plate 16 attached at an angle in the cap portion 13, and the guide ridges 18 move downward and downward. It becomes easy to flow along the direction of the row|line 18, and waste water tends to be formed in a spiral shape. As a result, the sedimentation separation distance (time) becomes longer, and the separation efficiency becomes higher.

<Modification 2 of the baffle plate of the sediment sedimentation separation collector>
FIG. 9 is a vertical cross-sectional view of the cap portion showing a state in which the baffle plate of Modification 2 is curved.
The baffle plate 16 of Modification 2 is formed by bending the baffle plate 16 itself. By forming the baffle plate 16 to be curved in this manner, waste water and air flowing in from the intake port 14 collide with the curved baffle plate 16, are bent along this shape, flow downward, and flow smoothly in a spiral shape. becomes easier to flow into

In addition, the present invention is capable of efficiently recovering metals from dental treatment wastewater by increasing the sedimentation efficiency of metals without reducing the flow rate of dental treatment wastewater, and is capable of efficiently recovering metals from dental treatment wastewater. As long as it can be easily and detachably attached to 51, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

The dental treatment wastewater treatment system and its wastewater treatment method of the present invention are not limited to the recovery of metals generated during dental treatment, but can also be applied to accessory processing using precious metals and wastewater containing precious metals. can be used.

REFERENCE SIGNS LIST 11 Sediment sedimentation separation collector 12 Bottle 13 Cap portion 14 Inlet 15 Discharge port 16 Baffle plate 17 Open/close cover 18 Guidance ridge 51 Dental chair unit 53 Vacuum chip 55 Dental suction device 56 Separator 59 Metal collector

The dental treatment wastewater treatment system of the present invention is a dental treatment wastewater treatment system for recovering metal powder from filth and cleaning water generated during dental treatment in a dental chair unit (51),
a vacuum tip (53) for sucking teeth, metal powder, resin cuttings, saliva, blood, meat pieces, filth such as medicines, and wastewater containing wash water generated during dental treatment with a dental suction device (55);
The wastewater and air sucked by the vacuum tip (53) are changed into a downward spiral shape, and the metal powder and tooth fragments contained in the wastewater are sedimented and separated to collect sediment containing metal powder. a bottle (12) for sedimentation and recovery of the (14) and an outlet (15) for discharging and said inlet (14) such that the waste water coming from said inlet (14) hits with air and changes its flow direction at the top of said bottle (12). ), a sediment sedimentation separation collector (11) comprising:
a separator (56) for separating the waste water sucked by the sediment sedimentation separation collector (11) into sludge and waste water containing metal powder that was not sedimented and separated;
and a metal recovery device (59) for recovering metal powder from the wastewater separated by the separator (56).

The wastewater treatment method of the present invention is a dental treatment wastewater treatment method for recovering metal powder from filth and washing water generated during dental treatment in a dental chair unit (51),
A hemispherical cap having an inlet (14) and an outlet (15) for waste water containing tooth, metal, resin cuttings, saliva, blood, meat pieces, medicines and waste water generated during dental treatment. part (13) is sucked into the bottle (12) provided at the top ,
The waste water is collided with air against a baffle plate (16) provided in the cap portion (13), which is horizontally inclined with respect to the axial direction of the inflow direction of the intake port (14). , directing this wastewater flow by turning it into a downward spiral,
This wastewater is separated into solid matter such as filth and metal powder by lengthening the residence time from the inlet (14) of the cap (13) to the outlet (15) in the bottle (12). , solids are allowed to settle and waste water containing dirt and wash water is discharged through the outlet (15) .

Claims (6)

A dental treatment wastewater treatment system for recovering metal powder from filth and cleaning water generated during dental treatment in a dental chair unit (51),
a vacuum tip (53) for sucking teeth, metal powder, resin cuttings, saliva, blood, meat pieces, filth such as medicines, and wastewater containing wash water generated during dental treatment with a dental suction device (55);
A sediment sedimentation separation collector ( 11) and
a separator (56) for separating the waste water sucked by the sediment sedimentation separation collector (11) into sludge and waste water containing metal powder that was not sedimented and separated;
A dental treatment wastewater treatment system, comprising: a metal recovery device (59) for recovering metal powder from the wastewater separated by the separator (56). The sediment sedimentation separation collector (11)
a bottle (12) for settling and recovering the sediment containing the metal powder;
A hemispherical cap portion (13) detachably attached to the upper portion of the bottle (12);
an inlet (14) for taking in waste water and an outlet (15) for discharging waste water attached to the cap (13);
a baffle plate (16) that impinges and changes the direction of flow of wastewater coming from the inlet (14) with air;
2. A dental treatment wastewater treatment system according to claim 1, characterized in that said baffle (16) is mounted horizontally inclined with respect to the inflow axial direction of said inlet (14). 3. Dental wastewater treatment system according to claim 2, characterized in that the bottom of the bottle (12) is provided with an opening/closing lid (17) for taking out sediment deposited therein. 4. A sedimentation recovery system according to claim 2 or 3, characterized in that a guide ridge (18) is formed on the side of the baffle plate (16) on the intake port (14) side to regulate the flow of wastewater and air. . 4. A sedimentation recovery system according to claim 2 or 3, wherein said baffle plate (16) is curved so as to protrude toward said discharge port (15). A dental treatment wastewater treatment method for recovering metal powder from filth and washing water generated during dental treatment in a dental chair unit (51), comprising:
Intake (14) and discharge (15) of the cap portion (13) allow waste water containing tooth, metal, resin cuttings, saliva, blood, meat pieces, drugs, and cleaning water generated during dental treatment. aspirated into a bottle (12) having
The waste water is caused to collide with air against a baffle plate (16) provided in the cap portion (13) to guide the flow of the waste water by changing it into a downward spiral shape,
The wastewater is retained in the bottle (12) from the inlet (14) of the cap (13) to the outlet (15) for a longer period of time to precipitate solid matter. Treatment wastewater treatment method.

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