JP4729590B2 - Separation device - Google Patents

Description

  The present invention relates to a separation device for separating solid impurities contained in running water such as sewers.

  Rainwater and other wastewater flowing into sewer stormwater drainage treatment facilities laid in urban areas are partly stored or discharged into the ground by rainwater storage and penetration facilities and the rest are discharged into rivers and the like. The rainwater flowing through the sewer is contaminated with solid impurities such as earth and sand, various garbage, papers, fallen leaves, etc., and these impurities flow into the river, causing water pollution and environmental pollution. In addition, if it flows into the rainwater storage and penetration facility without being treated, it is necessary to frequently perform maintenance of the facility, which is disadvantageous in terms of cost. In particular, infiltration facilities may cause a decrease in osmotic function, making it difficult to use for a long period of time. Therefore, a wastewater separation device for separating solid impurities is provided in a part of the sewer.

  2. Description of the Related Art As a wastewater separation device, a separation device that generates a swirl flow (swirl) in wastewater and separates solid impurities by the swirl flow is known (for example, trade name “Flud Sep” from UFT, Germany). In addition, Patent Document 1 discloses an apparatus that separates impurities by a filter method in order to separate solid impurities contained in oil.

  In the separation apparatus disclosed in Patent Document 1, a plurality of hollow tubes having a small diameter are arranged annularly in a separation tank to form a filter portion made of an annular body, and oil containing impurities is tangent from the outside of the annular body. Supply in the direction to generate a swirling flow. The swirl flow separates solid impurities adhering to the outside of the annular body, thereby reducing the labor of filter maintenance.

JP 2004-275957 A

  The former separation tank using the swirl flow is easy to maintain because it does not have a filter part, but it is difficult to reliably separate floating impurities and fine solid impurities.

  Since the separation device disclosed in Patent Document 1 has a filter portion, it can also separate fine solid impurities. However, in the disclosed structure, while the separated impurities continue to swirl along the outer peripheral surface of the filter, they may converge on the central area of the swirling flow and re-attach to the filter, so that the problem of maintenance free of the filter section It is hard to say that is completely resolved.

  In view of the above, an object of the present invention is to provide a wastewater separation apparatus that achieves maintenance-free filter parts and enables reuse of rainwater and factory wastewater.

A first separation device of the present invention that solves the above problems is a device for separating solid impurities contained in flowing water, a separation tank, a filter section that partitions the inside of the separation tank into an inflow chamber and an outflow chamber, and an inflow A flowing water supply section provided in the chamber, a drainage discharge section provided in the outflow chamber, and an impurity trapping section provided below the inflow chamber, the supply section being above the side wall of the separation tank forming the inflow chamber The discharge part is provided above the side wall of the separation tank forming the outflow chamber and so as to face the supply part, and the filter part separates the flowing water supplied from the supply part in the inflow chamber, respectively. Formed in a V shape having two sides so as to form a horizontal swirling flow, the lower end side of the filter portion is located above the bottom portion of the separation tank, and the side wall of the separation tank that forms the outflow chamber with the lower end side bottom of the outflow chamber by a partition plate provided has been formed between the It is characterized in.

Further, the second separator is the above-mentioned first separator, wherein a floor plate is provided between the lower end side of the filter part and the side wall of the separation tank forming the inflow chamber, and a through hole is provided in at least one place of the floor plate. The impurity trapping portion is provided on the lower side of the floor plate .

The third separation device is characterized in that, in the first or second separation device, the inside of the side wall of the separation tank is formed in a circular shape, a square shape or an elliptic shape.

  According to a fourth separation apparatus, in any one of the first to third separation apparatuses, the filter unit includes a wedge wire screen in which a plurality of wedge wires having a wedge-shaped cross section are arranged in the vertical direction, and a head of each wedge wire is formed. The surface on the inflow chamber side is formed at the portion, and the axis line from the head of each wedge wire to the tip is inclined to the downstream side of the swirling flow formed as described above. is there.

  Further, the fifth separator is provided with an overflow part for overflowing drainage from the inflow chamber to the outflow chamber at the upper part of the filter part in any one of the first to fourth separators, and the discharge part from the lower part of the outflow chamber. The drainage in the lower part of the outflow chamber can be discharged from the discharge part through the guideway, and solid floating impurities or oil can stay in the upper part of the outflow chamber. It is characterized by this.

The first separation device of the present invention is a device for separating solid impurities contained in flowing water, a separation tank, a filter part for partitioning the inside of the separation tank into an inflow chamber and an outflow chamber, and flowing water provided in the inflow chamber. Supply portion, a drainage portion of running water provided in the outflow chamber, and an impurity trapping portion provided below the inflow chamber. The supply portion is provided above the side wall of the separation tank forming the inflow chamber. The section is provided above the side wall of the separation tank forming the outflow chamber and so as to face the supply section, and the filter section divides the flowing water supplied from the supply section into the inflow chamber to respectively rotate in the horizontal direction. The lower end side of the filter part is located above the bottom part of the separation tank and is provided between the lower end side and the side wall of the separation tank that forms the outflow chamber. wherein the bottom of the outflow chamber by a partition plate is formed with

According to the separation device configured as described above, the flowing water supplied from the supply unit is diverted by the V-shaped filter unit, and reversely swivels horizontally between the two sides of the filter unit and the side wall of the separation tank. Two swirling flows are formed. Solid impurities smaller than the width of the filter eyes and slits included in the swirling flow are blocked by the filter portion, and only the flowing water passes through the filter portion and flows into the outflow chamber side. The solid impurities blocked by the filter part are separated from the surface of the filter part by the action of the swirling flow, and the floating impurities having a light specific gravity float and rotate in the upper part of the separation tank by the swirling flow and stay. Next, the impurities having a specific gravity greater than 1 gradually descend and accumulate on the impurity trapping portion provided below the inflow chamber. At that time, since the lower end of the filter portion is located above the bottom of the separation tank, two horizontal swirling flows swirling in opposite directions formed above the inflow chamber are below the lower end of the filter portion. However, since there is no filter part in the extended portion, the swirling forces in the opposite directions interfere with each other, and the swirling flows are canceled out and almost disappear. Therefore, the impurities that sink downward lose the buoyancy that depends on the swirling flow, and can rapidly descend and accumulate in the impurity trapping portion provided below. Further, since there is almost no swirling flow in the deposition region, the deposited impurities will not re-float. Therefore, the separation apparatus configured in this way generates two swirling flows sufficient to prevent impurities from adhering to the filter section, and two swirls that rotate backward in the horizontal direction in order to promote the sedimentation of impurities. Both conflicting requirements of reducing or eliminating the turning force due to the flow interfering with each other can be achieved.

In the second separator, in the first separator, a floor plate is provided between the lower end side of the filter portion and the side wall of the separation tank forming the inflow chamber, and a through hole is provided in at least one place of the floor plate. The impurity trapping portion is provided on the lower side of the floor plate . With such a configuration, impurities having a large specific gravity are accumulated in the impurity trapping portion provided below the inflow chamber through the through hole of the floor plate. In that case, the force which two horizontal swirl | flows of the mutually opposite direction formed above an inflow chamber try to extend below an inflow chamber is restrict | limited further than the case where a floor board does not exist.

  In the fourth separation device, in any one of the first to third separation devices, the filter section is configured by a wedge wire screen in which a plurality of wedge wires having a wedge-shaped cross section are arranged in the vertical direction, and the head of each wedge wire is formed. The surface on the inflow chamber side can be formed by the portion, and the axis line from the head portion of each wedge wire toward the tip portion can be inclined to the downstream side of the swirling flow formed.

  In this way, when the filter part is composed of a wedge wire screen, micron-order fine solid impurities can be efficiently separated. Further, the surface of the inflow chamber is formed at the head of each wedge wire constituting the wedge wire screen, and the arrangement shape of the head is configured to form a horizontal swirling flow in the flowing water supplied from the supply unit. Therefore, fine solid impurities adhering to the wedge wire screen can also be separated by the swirling flow. Therefore, clogging of the wedge wire screen having a fine slit can be suppressed. In particular, finely shaped solids such as earth and sand that are likely to cause clogging of slits and have a high specific gravity come into contact with and collide with the wedge wire head of the wedge wire screen, and the solids are swirled. As a result of the tea cup phenomenon, it is easy to gather at the center of the swirling flow away from the surface of the screen, so that there is an effect of suppressing clogging of the slit.

  Furthermore, since the axis line from the head of each wedge wire toward the tip is inclined to the downstream side of the formed swirl flow, the end of the head on the upstream side of the swirl flow is the end of the head on the downstream side. It protrudes from the section toward the inflow chamber. Therefore, the swirl flow collides with the protruding end portion and is efficiently drawn into the slit by the Coanda effect, and as a result, the water flow rate of the filter portion can be substantially increased. Therefore, even if the interval between the slits is made small so that solid impurities of about several microns to 1 mm can be separated, the water passage efficiency is high, so that the area of the filter portion can be suppressed and the device can be made compact.

  Recently, the reuse of rainwater has been demanded for the effective use of water resources. For example, a wedge wire screen with a slit width of 100 μm to 300 μm is used to separate solids contained in rainwater falling on the ground surface. If used, rainwater that has passed there has little influence on equipment such as pump equipment failure, and can be reused as miscellaneous wastewater such as sprinkling, and this facilitates the reprocessing process for advanced use.

  Further, in the fifth separator, in any one of the first to fourth separators described above, an overflow part for overflowing drainage from the inflow chamber to the outflow chamber is provided in the upper part of the filter part, and the discharge part is provided from the lower part of the outflow chamber. The drainage in the lower part of the outflow chamber can be discharged from the discharge part through the guideway, and solid floating impurities or oil can be retained in the upper part of the outflow chamber. .

  When configured in this way, if there is an inflow of drainage beyond the planned value from the supply section, or if there is a problem in the filter section and the water flow capacity is reduced, the floating impurities that remain in the upper part of the inflow chamber are Although it overflows from the overflow part to the outflow chamber side, since a guide path extending from the lower part of the outflow chamber to the discharge part is provided, floating impurities and oil do not flow out. Then, the floating impurities and oil staying in the upper part of the outflow portion may be recovered outside when reaching a certain amount.

  In this way, this device is a swirling flow that is generated by using the flow velocity energy of running water without using a precipitating agent or a flocculant to remove solid impurities contained in wastewater such as rainwater. In addition, it is possible to separate solids efficiently without clogging with a filter that can separate fine impurities, and it is very ecological and environmentally friendly running water separation that does not use electric energy for the treatment. Device. In particular, the sewer system is based on drainage using a natural gradient, so the use of this device is optimal. In addition, when it is necessary to drain from the underground rainwater storage tank to the ground or a river, or when it is necessary to send water to a distant place, it is necessary to pump it with a pump, etc. Separation processing can be performed with a minimum amount of electric energy for operating the pump.

  Hereinafter, the best embodiment of the waste water separation device according to the present invention will be described with reference to the drawings.

  FIGS. 1A and 1B show the separation device 1 according to the first embodiment, and FIG. 2 is a diagram showing a swirl flow generation state in the separation device 1 of FIG. In the following embodiment, rainwater drainage such as roads and sewers is described as an example of running water.However, the present invention is not limited to this, and running water such as industrial water taken from rivers and the like, wastewater treatment generated in a factory, It can also be applied to its reuse.

  A separation tank 2 which is a main part of the separation apparatus 1 has a bottomed cylindrical tank body 3 having a cylindrical cross-sectional side wall 4 having a circular cross section with an open top, and the inside of the tank body 3 is V-shaped. The inflow chamber 5 and the outflow chamber 6 are partitioned by the filter portion 7 formed in the above, and a supply pipe 9 for introducing drainage is provided as a drainage supply portion above the side wall of the inflow chamber 5, and is provided at the bottom portion An impurity trapping portion 11 is provided. Further, a drainage pipe 10 for draining the drainage is provided above the side wall of the outflow chamber 6 as a drainage discharge part, and a guide path 13 rising from the lower part to the drainage pipe 10 is provided. The guide path 13 is installed so as to be higher than the upper part of the filter unit 7, and the upper part of the guide path 13 is opened or an air discharge port is attached. Is made so as not to become negative pressure.

The supply pipe 9 and the drain pipe 10 are arranged opposite to each other, and are opposed to each other at a position of substantially 180 ° in terms of the phase angle of the side wall 4. Moreover, the lower end of the filter part 7 is located above the bottom part of the separation tank 2, and between the lower end and the side wall of the outflow chamber 6 is closed with a partition plate 6a.

  The material of the tank body 3 is, for example, made of concrete, steel, FRP (fiber reinforced plastic), or resin such as polyethylene. When installed in the sewer system, it is buried in the ground according to the sewer line. However, the upper part is exposed to the ground surface and closed with a lid (not shown) such as a detachable iron plate.

  As shown in FIGS. 1 and 2, plate-like filter materials are attached to the side plates on the two sides of the filter unit 7, respectively. As a plate-like filter material, a punching metal screen is generally used.

  On the other hand, solid impurities to be separated in stormwater drainage often contain a large amount of crushed pieces such as fine fallen leaves. In recent years, there has been an increasing need for circulating water resources through underground storage and penetration of rainwater. There is a strong demand for a separation apparatus that can efficiently separate impurities having a small diameter, for example, impurities of several microns to 1 mm. A wedge wire screen is known as a filter unit that can efficiently separate solid impurities of several microns to 1 mm. Therefore, when separating fine solid impurities, it is desirable to provide a wedge wire screen in the filter unit 7.

  FIG. 3 shows an example of the wedge wire screen 8. FIG. 3A is a perspective view of the wedge wire screen viewed from the front, and FIG. 3B is a perspective view of the wedge wire screen viewed obliquely from above. The wedge wire screen 8 is formed by arranging a plurality of wedge wires 8a having a wedge-shaped cross section in parallel, and minute slits 8b of about 10 microns to 1 mm are formed between the wedge wires 8a. Each wedge wire 8a is fixed to a plurality of support bars 8c by spot welding or the like. Each wedge wire 8a and support bar 8c are made of a corrosion-resistant metal material such as stainless steel. Each slit 8b formed in the wedge wire screen 8 blocks the passage of solid impurities of several microns to several tens of microns and allows only running water to pass through.

  FIG. 4 is a partially enlarged cross-sectional view of the wedge wire 8a and the slit 8b constituting the wedge wire screen 8 used for the filter unit 7. As shown in FIG. The wedge wires 8a having a wedge-shaped cross section are arranged in parallel with each other at a predetermined interval, and the surface of the head 8d forms a part of the surface on the inflow chamber side. The wedge axis S extending in the vertical direction from the surface of the head 8d is inclined downstream in the swirl flow direction along the inner surface of the filter portion 7 indicated by an arrow L. The angle α between the swirling flow direction L and the surface of the head 8d is set to 3 to 8 degrees, usually about 5 degrees.

  When the axis S of each wedge wire 8a is inclined in this way, as shown in the drawing, the end 8e of the head 8d on the upstream side of the swirl flow is located inside the inflow chamber 5 from the end 8f of the head 8d on the downstream side. Protrude in the direction. Therefore, the swirling flow collides with the protruding end portion 8e of each wedge wire 8a and is efficiently drawn into the slit 8b by the Coanda effect. Therefore, water permeability improves and brings about the effect which increases the water permeability of a filter part substantially.

  The filter part 7 has a vertical length (height) that extends upward from an intermediate height at which the upper part is separated from the bottom part of the separation tank 2. It becomes the overflow part 12 which overflows waste water. In addition, the filter portion 7 can be detachably attached to the tank body 3 by being fitted into a concave groove provided inside the side wall 4 so as to be dropped from above.

  For example, stainless steel or FRP can be used as the material of the side plate of the filter unit 7, and a plate material made of such a material is processed to form a V-type filter unit 7 having a sharp tip as shown in the figure. However, the filter portion 7 is not limited to the V shape as shown in the figure, and as will be described later, the waste water that flows into the inflow chamber 5 is divided into two to smoothly form a horizontal swirl flow, respectively. As long as it is a shape that can be formed, for example, the tip may be a V shape having a circular or elliptical shape.

  Further, the V-shaped included angle θ can be arbitrarily selected as long as the horizontal swirl flow can be smoothly formed. However, according to experiments, the V-shaped included angle θ is preferably in the range of 30 ° to 90 °. is there. Thus, various application examples are possible for the cross-sectional shape of the filter unit 7, and four examples are schematically shown in FIGS.

  FIG. 5 (a) shows a basic shape, but in this case, the V-shaped key portion 7a of the filter portion 7 has an acute angle, so that the water flow supplied to the inflow chamber 5 can be efficiently divided into two. However, it is easy for the suspended matter to get caught in the caulking portion 7a. On the other hand, in the example of FIG. 5 (b), the caulking portion 7a is rounded, so that the suspended matter that has reached is slid and is not easily caught. Further, as shown in FIG. 5 (c), when the V-shaped crimping portion 7a and the open leg tip portions on both sides are rounded, the swirl flow can be generated more smoothly. Further, as shown in FIG. 5 (d), the effect as shown in FIGS. 5 (b) and 5 (c) can be obtained also when the caulking portion is formed by the pipe 7b.

  The plate-shaped wedge wire screen 8 can be provided on a part of the side plate, or the filter unit 7 can be constituted by only the wedge wire screen 8 unitized without the side plate. When the solid impurities to be separated are relatively large, for example, about 1.0 mm to 0.5 mm, a wedge wire screen 8 having a slit gap set to 0.5 to 0.25 mm is used. When the solid impurities to be separated have a fine particle diameter, for example, about 50 to 10 microns, it is desirable to use those having a slit gap set to about 100 to 20 microns.

  Next, an example of the case where the separation apparatus 1 according to the first embodiment is installed in a sewer system will be described with reference to the drainage separation action.

  When a normal amount of wastewater flows through the supply pipe 9, the wastewater that flows into the inflow chamber 5 of the separation tank 2 from the supply pipe 9 becomes a partition from the outflow chamber 6, as shown in FIG. The water level lower than the top of the filter unit 7 is maintained. The water level at this time is not uniquely determined, and changes according to the amount of drainage flowing through the supply pipe 9 and the magnitude of velocity energy.

  As shown in FIG. 2, when drainage flows from the sewer pipe through the supply pipe 9 of the separation tank 2 into the inflow chamber 5, two drainage flows into the inflow chamber 5 by the V-shaped filter unit 7. And flows along the inner peripheral surface of the cylindrical side wall 4, thereby forming two horizontal swirling flows as indicated by arrows in the drainage of the inflow chamber 5.

  The drainage of the inflow chamber 5 swirls in the horizontal direction as described above, but a part of the drainage flows out to the outflow chamber 6 through the many slits 8 b of the wedge wire screen 8. At that time, fine solid impurities contained in the waste water are blocked by the slits of the wedge wire screen 8 and separated. The solid impurities blocked by the slits of the wedge wire screen 8 are separated by the swirling flow in the horizontal direction and re-suspended in the drainage, toward the lower central portion of the capturing portion 11 provided below the inflow chamber 5, there It accumulates in.

  At that time, since the lower end of the filter unit 7 is located above the bottom of the separation tank 2 as described above, two horizontal swirling flows swirling in opposite directions formed above the inflow chamber 5 are: The swirl force extends from the lower end of the filter portion 7 to the lower portion. However, since the filter portion 7 does not exist in the extended portion, the swirl forces in the opposite directions interfere with each other, canceling each swirl flow and almost disappearing.

  Therefore, the impurities that sink downward lose the buoyancy that depends on the swirling flow, and can rapidly descend and accumulate in the impurity trapping portion 11 provided below. Further, since there is almost no swirl flow in the swirl region, the accumulated impurities will not re-float.

  The water level in the outflow chamber 6 is lower than the water level in the inflow chamber 5 due to the loss that occurs when passing through the wedge wire screen 8. Further, since the upper part of the guide path 13 is released to the atmosphere at a position higher than the filter portion 7 or is provided to the atmosphere by providing a ventilation pipe, the water level of the chamber surrounded by the guide path 13 is the outflow chamber 6. It drains from the drain pipe 10 by the potential energy at this time.

  On the other hand, most of the floating solid impurities or oil components having a specific gravity smaller than that of water float on the water surface region due to the action of the swirling flow and stay there. When a certain amount of impurities accumulated in the trapping part 11 or in the water surface region reach a certain amount, the lid covering the upper part of the separation tank 2 is removed, and the accumulated impurities are removed by suction with a vacuum wheel or the like. Impurities that float on the surface can be removed with a mesh handle or the like and removed to the outside.

  For example, when an abnormal state such as heavy rain occurs, a lot of solid impurities may flow into the sewer along with a large amount of rainwater exceeding the design value. In this embodiment, as a countermeasure, FIG. As shown to b), the overflow part 12 which overflows waste_water | drain from the inflow chamber 5 to the outflow chamber 6 in the open space part of the upper part of the filter part 7 is formed. Therefore, floating solid impurities and oil that stay in the vicinity of the water surface are accompanied by the drainage and overflow from the overflow portion 12 (see a two-dot chain line arrow) and flow into the outflow chamber 6. Since the outflow chamber 6 is provided with the guide path 13 that rises from the lower part to the drain pipe 10, it is possible to prevent the solid floating matters and oil that have flowed into the outflow chamber 6 from flowing out through the guide path 13.

  Next, FIG. 6 shows the waste water separator according to the second embodiment. In this case, the separation tank 2 shown in FIG. 1 of the first embodiment is cylindrical, whereas the second embodiment is a structural example in which the side wall 4 of the separation tank 2 is formed in a square cross section. That is, the auxiliary plates 14 are disposed obliquely at the four corners of the side wall 4 having a square cross section that forms the inflow chamber 5. The auxiliary plate 14 is provided to promote the formation of two horizontal swirling flows as indicated by arrows. For example, the auxiliary plate 14 is inserted into a concave groove formed in the side wall 4 from above by inserting the stainless auxiliary plate 14 from above. The chamber 5 is detachably mounted.

  The length of the auxiliary plate 14 in the height direction can be the same as that of the filter unit 7, but is not limited thereto, and if the formation of the horizontal swirling flow can be promoted, the lower portion thereof is extended to the intermediate region of the inflow chamber 5. You can also. Further, if the formation of the horizontal swirling flow can be promoted, the auxiliary plate 14 can be only two on the left side in FIG. Further, the auxiliary plate 14 may be an arc shape instead of a flat plate as shown in the figure, and in the case of an arc shape, a swirl flow can be further formed.

  That is, according to the second embodiment, the inner side of the side wall 4 in the separation tank 2 is formed in a square shape, and the auxiliary plate 14 is disposed in the corner of the square shape, thereby forming the inner side of the side wall of the inflow chamber in a polygonal shape. In addition, a horizontal swirling flow can be formed in each of two regions surrounded by the inside of the polygon and each side plate of the filter unit 7. If comprised in this way, even if it uses the square separation tank with easy manufacture, a horizontal swirling flow can be formed easily.

  Next, FIG. 7 shows the waste water separator according to the third embodiment. The third embodiment is a structural example when the side wall 4 of the separation tank 2 is formed into an elliptical cross section. That is, the separation tank 2 has a side wall having an elliptical cross section, and the supply pipe 9 and the drain pipe 10 are respectively in the inflow chamber on the same level facing the long diameter portion of the ellipse inside the side wall. 5 and the outflow chamber 6 are provided. In this case, since it has a long diameter portion, it is possible to form a swirl flow that is closer to a circular shape than in the case of a circular cross section.

  Next, FIG. 8 shows the waste water separator according to the fourth embodiment. In this case, the flat section V-shaped or U-shaped filter section 7 has a flat section V-shaped, and can capture and store primarily impurities such as light oil with a small specific gravity contained in the drainage. The low specific gravity impurity partition plate 15 is provided. By providing the partition plate 15 for low specific gravity impurities, an impurity such as oil separated in the inflow chamber 5 can be reliably captured. In this case, the filter part 7 whose bottom is closed by the partition plate 6 a is installed in the middle part inside the main body of the separation tank 2, and the space below the filter part 7 is provided as the impurity capturing part 11. The upper part of the low specific gravity impurity partition plate 15 has an opening or a structure that can discharge and suck air so that the inside of the low specific gravity impurity partition plate 15 does not become negative pressure during drainage.

  FIG. 9 shows a wastewater separation apparatus according to a fifth embodiment, which can be called an application example of the fourth embodiment. In this case, a floor plate 16 is provided to separate the attachment portion of the filter portion 7 and the impurity trapping portion 11 from above and below. On the inflow chamber side of the floor plate 16, there is provided at least one central through hole 16a penetrating vertically, and the impurities separated by the filter part 7 flow down from the through hole 16a to the lower capturing part 11 to be sure. Will be able to capture. The trapped impurities can be removed by inserting a vacuum vehicle hose into the through-hole 16a of the floor plate 16 and depositing on the trapping portion 11. In any case, since there is no sedimentary impurity around the inflow chamber 5 side of the filter unit 7, it is possible to prevent clogging of the filter unit 7 due to these impurities.

  In all the embodiments from the first embodiment to the fifth embodiment, impurities having a large specific gravity that can be trapped in the inflow chamber 5 are deposited in the impurity trapping portion 11 provided at the bottom, and the deposited impurities are vacuum. Although periodically removed by a car or the like, the impurities in the separation tank 2 can be reliably removed and cleaned by forming the bottom of the impurity trapping part 11 in a mortar shape.

  As mentioned above, although the 1st-5th Example was demonstrated about the waste_water | drain separation apparatus of this invention, it is not limited to those embodiments, Other embodiment, application example, modification within the range which does not deviate from the main point of this invention. Examples and combinations thereof are also possible.

  For example, running water to which the present invention can be applied includes rainwater flowing into houses, road surfaces, fields, sewers, general wastewater, factory wastewater, kitchen wastewater at restaurants, wastewater from meat processing plants, or industrial water. it can. Moreover, it can be applied when reusing these wastewaters, and therefore, even when applied to many industries, it can be preferably used.

It is a figure which shows the separation apparatus by 1st Example. It is a figure which shows the swirl | vortex flow generation state in the separation apparatus of 1st Example of FIG. It is a figure which shows one example of a wedge wire screen. It is a partial expanded sectional view of the wedge wire and slit which comprise a wedge wire screen. It is a figure which shows typically the example of application of the cross-sectional shape of a filter part. It is a figure which shows the waste_water | drain separation apparatus by 2nd Example. It is a figure which shows the waste_water | drain separation apparatus by 3rd Example. It is a figure which shows the waste_water | drain separation apparatus by 4th Example. It is a figure which shows the waste_water | drain separation apparatus by 5th Example.

DESCRIPTION OF SYMBOLS 1 Separator 2 Separation tank 4 Side wall 3 Tank body 5 Inflow chamber 6 Outflow chamber 6a Partition plate 7 Filter portion 7a Caulking portion 7b Pipe 8 Wedge wire screen 8a Wedge wire 8b Slit 8c Support rod 8d Head 8e, 8f End 9 Supply Pipe 10 Drain pipe 11 Trapping part 12 Overflow part 13 Guideway 14 Auxiliary plate 15 Partition plate for low specific gravity impurities 16 Floor plate 16a Through hole

Claims (5)

In an apparatus for separating solid impurities contained in flowing water, a separation tank, a filter part for partitioning the inside of the separation tank into an inflow chamber and an outflow chamber, a supply part of flowing water provided in the inflow chamber, and an outflow chamber are provided. It has a drainage section for running water and an impurity trapping section provided below the inflow chamber, the supply section is provided above the side wall of the separation tank forming the inflow chamber, and the discharge section is provided for the separation tank forming the outflow chamber. The filter unit is provided above the side wall and so as to face the supply unit, and the filter unit has two sides so that running water supplied from the supply unit is divided in the inflow chamber to form a horizontal swirl flow, respectively. Formed in a V shape, the lower end side of the filter portion is located above the bottom of the separation tank, and the bottom of the outflow chamber is formed by a partition plate provided between the lower end side and the side wall of the separation tank forming the outflow chamber Separation device characterized by being made. In Claim 1, a floor board is provided between the lower end side of a filter part, and the side wall of the separation tank which forms an inflow chamber , a through-hole is formed in at least one place of the floor board, and the impurities are below the floor board. Separation device, characterized in that a capturing part is provided . The separation apparatus according to claim 1 or 2, wherein an inner side wall of the separation tank is formed in a circular shape, a square shape, or an elliptic shape. 4. The filter unit according to claim 1, wherein the filter portion is composed of a wedge wire screen in which a plurality of wedge wires having a wedge-shaped cross section are arranged in the vertical direction, and a surface on the inflow chamber side is formed at the head of each wedge wire. And an axis line from the head to the tip of each wedge wire is inclined to the downstream side of the swirling flow formed as described above. 5. The method according to claim 1, wherein an overflow part is provided at the upper part of the filter part for overflowing drainage from the inflow chamber to the outflow chamber, and a guide path extending from the lower part of the outflow chamber to the discharge part is provided. A separation apparatus characterized in that drainage at the lower part of the chamber can be discharged from the discharge part through the guide passage, and solid floating impurities or oil can be retained in the upper part of the outflow chamber.

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