JP5944721B2 - Sand settling equipment - Google Patents

Sand settling equipment Download PDF

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JP5944721B2
JP5944721B2 JP2012087204A JP2012087204A JP5944721B2 JP 5944721 B2 JP5944721 B2 JP 5944721B2 JP 2012087204 A JP2012087204 A JP 2012087204A JP 2012087204 A JP2012087204 A JP 2012087204A JP 5944721 B2 JP5944721 B2 JP 5944721B2
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sand
water
settling
basin
sewage
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JP2013215656A5 (en
JP2013215656A (en
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徹 数井
徹 数井
清 福浦
清 福浦
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前澤工業株式会社
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  The present invention relates to a sand settling facility, and more particularly, to a sand settling facility including a sewage settling basin into which sewage flows continuously and a rainwater settling basin into which sewage flows in rainy weather.
  Conventionally, a sewage treatment plant has been provided with a sand settling facility for removing sand contained in sewage such as sewage. This sand settling facility is a sand collection basin that sinks sand in sewage, and sand collection that transports sand (sediment) that has settled on the bottom of the sand settling basin to a sand settling pit provided at a part of the bottom of the settling basin. An apparatus, a sand raising device for discharging the sand collected in the sand settling pit together with water from the sand basin, and a sand set separator for separating the sand set by the sand raising device and the water are provided. As the sand collecting device, a device in which a plurality of nozzles for injecting pressure water toward the sand settling pit is provided on the bottom of the sand settling basin is widely used. Moreover, as the sand raising device, a jet pump using pressure water as a drive source is often used (see, for example, Patent Documents 1 and 2).
JP 2007-38208 A JP 2009-39698 A
  Usually, the pressure water boosted by a single pump is commonly used for the sand collection water used in the sand collection device and the sand collection water used in the sand collection device. Since pressure water is required, jetting this high-pressure water from the sand collector nozzle as sand collection water may wind up the sediment that has accumulated on the bottom of the ground, resulting in a decrease in sand collection efficiency. In addition, it is necessary to block the downstream flow path during the sand collection so that the water containing the rolled up sand does not flow downstream. Furthermore, since a large-capacity pump is required to obtain high-pressure water, there is a problem that equipment costs and power costs increase. Moreover, when the pressure water used for the sand collecting device and the pressure water used for the sand lifting device are boosted by different pumps, although the sand set-up can be avoided, the equipment cost increases.
  SUMMARY OF THE INVENTION An object of the present invention is to provide a sand settling facility that can efficiently collect sand and lift sand while suppressing facility costs and power costs of a pump.
In order to achieve the above object, the sand settling facility of the present invention comprises a sewage settling basin into which sewage flows continuously and a stormwater settling basin into which sewage flows in rainy weather. In the sand settling facility provided with each means, as the sand collecting means, the sewage sand basin has an underwater sand collecting device for collecting sand in a state where inflow sewage is stored in the pond, and the rainwater sand basin is placed in the pond. A dry sand collecting device is provided for collecting sand in a state where discharged sewage is discharged, and a water storage tank is disposed above the water surface of each settling basin, and the underwater sand collecting device and the dry sand collecting device are A plurality of sand collecting water outflow portions for collecting sand by flowing water flowing down from the water storage tank, and the sand lifting means provided in each of the sand basins are provided in each of the sand basins and are collected by the respective sand collecting means. Sand sink suction pipe A sand settling tank connected to each sand settling suction pipe via a sand pumping valve, an ejector for sucking fluid in the sand settling tank through a fluid discharge valve, and the water storage in the ejector and the sand settling tank. A pump for boosting and supplying water in the tank, an ejector drive water supply path connecting the pump and the ejector via an ejector operating valve, and a waste water supply valve for connecting the pump and the sand settling tank. The sand discharge water supply path connected through the sand discharge water, the sand discharge discharge path for discharging the sand settling from the sand settling tank accompanied by the sand discharge water supplied from the sand discharge water supply path, and the sand discharge discharge path. A sand settling machine that separates the settling sand and water in the collected sand discharge water, and a water return path that returns the water separated by the sand settling machine to the water storage tank, and the sand collecting water outflow of the underwater sand collecting device The section pumps down water flowing down from the water storage tank. Therefore boosted water is characterized Rukoto supplied. Further, in addition to the present invention, a dust remover provided on the upstream side of the sewage settling basin, a collection tank for collecting the debris captured by the dust remover, and the collection tank and the sand settling tank are connected. A residue collection path, a residue separation and dehydrator for separating the residue and performing a dehydration process, and a residue treatment path that is branched from the sedimentation discharge path and connected to the residue separation and dehydrator are provided. It is characterized by that.
Furthermore, the sand settling facility of the present invention comprises a sewage settling basin into which sewage flows continuously and a rainwater settling basin into which sewage flows in the rain, and each settling basin is provided with a sand collecting means and a sand lifting means. In the sand settling facility, as the sand collecting means, the sewage sand basin is provided with an underwater sand collecting device for collecting sand in a state where the inflow sewage is stored in the pond, and the rainwater settling basin is discharged with sewage flowing into the pond. In addition, a dry sand collecting device is provided for collecting sand in a state where the sand is collected, and a water storage tank is disposed above the water surface of each settling basin, and the underwater sand collecting device and the dry sand collecting device flow down from the water storage tank. Provided with a plurality of sand collecting water outflow portions for collecting sand by flowing down water, the sand lifting means provided in each settling basin is provided in each settling basin and sucks the sand collected by each sand collecting means. Sedimentation suction pipe and each sedimentation suction pipe Sand storage tanks connected through sand pumps, ejectors for sucking fluid in the sand storage tanks through fluid discharge valves, and water in the storage tanks are boosted to the ejectors and the sand storage tanks. A pump to be supplied in this manner, an ejector drive water supply path in which the pump and the ejector are connected via an ejector actuating valve, and a sand discharge in which the pump and the sand sediment storage tank are connected via a sand discharge water supply valve A water supply path, a sand settling path for discharging the settling sand from the settling tank accompanied by the sand discharge supplied from the sand discharge water supply path, and a sand settling in the waste water discharged to the settling discharge path And a water removal path for returning the water separated by the sand sedimentation separator to the water storage tank, a dust remover provided upstream of the sewage sand basin, and the dust remover A collection tank for collecting the residue trapped in the The tank is connected to the sedimentation tank, the residue collection path, the residue is separated and dewatered, and the residue separation and dehydrator is provided, and is branched from the sedimentation discharge path and connected to the residue separation and dehydrator. It is characterized in that a scum residue processing path is provided.
  According to the sand settling facility of the present invention, optimum sand collection means are installed in each of the sewage settling basin where sewage flows continuously and the stormwater settling basin where a part of the sewage increased during rainy weather flows. By separating the sand and water in the discharged sand discharged by the means with a sand settling device, the separated water is returned to the water storage tank and used as ejector drive water or sand collection water, so that the water can be effectively used. . In addition, since the sediment is sucked into the sedimentation tank where the internal fluid is discharged by the ejector and decompressed, a pump having a capacity capable of supplying water that can decompress the sedimentation tank with the ejector may be installed. Compared with a large-capacity pump for obtaining high-pressure water, a small-capacity pump may be installed, which can reduce equipment costs and power costs. Further, by using water flowing down from the water storage tank as the sand collecting means or water from a pump having a smaller capacity than the conventional one as sand collecting water, it is possible to prevent the sand from being rolled up.
It is explanatory drawing which shows one example of a sand settling equipment of this invention. It is a perspective view which shows an example of the underwater sand collecting apparatus provided in the sewage sedimentation basin. It is a perspective view which shows an example of the dry sand collecting apparatus provided in the rainwater settling basin. It is explanatory drawing which shows an example of a rocking | swiveling type sand settling suction pipe.
  As shown in FIG. 1, the sand settling facility shown in the present embodiment includes a sewage settling basin 10 into which sewage flows continuously, and a stormwater settling basin 20 into which a part of the sewage that has increased due to the combination of rainwater flows in the rain. And. As the sand collecting means provided in each of the sewage settling basin 10 and the rainwater settling basin 20, the sewage settling basin 10 pits the sand settling in the pond bottom while storing the sewage flowing into the sewage settling basin 10 in the water. 11, an underwater sand collecting device 12 that collects sand toward the rainwater sinking basin 20 is provided in the rainwater settling basin 20 in the pit 21 while the sandwater that has flowed into the rainwater settling basin 20 is discharged. A dry sand collecting device 22 for collecting sand is provided. In addition, a water stop gate 13 is provided on the upstream side and the downstream side of the sewage settling basin 10, and a dust remover 14 is provided on the upstream side. On the other hand, a water stop gate 23 is provided on the upstream side of the rainwater settling basin 20, and a dust remover 24 is provided on the downstream side.
  As shown in FIG. 2, the underwater sand collecting device 12 includes a plurality of concrete trough foundations 15 having a descending slope toward the pit 11 at the bottom of the sewage sedimentation basin 10, and an inside of the trough foundation 15. A provided water supply passage 16, a metal trough body 17 provided so as to cover the upper portion of the trough foundation 15, and a sand collection water supply pipe for supplying sand collection water to the water supply passage 16 from a lower slope lower end side. 18 and a plurality of sand collecting nozzles 19 for discharging the sand collecting water supplied into the water supply passage 16 toward the pit 11 on the upper surface of the trough body 17.
  As shown in FIG. 3, the dry sand collecting device 22 includes a plurality of troughs 25, which are partitioned in parallel to the flow direction of the pits 21 at the bottom of the pond having a downward slope toward the pits 21, and the troughs. 25, a water supply passage 26 provided in the uppermost stream portion, a sand collection water supply pipe 27 for supplying sand collection water to the water supply passage 26, and the sand collection water supplied into the water supply passage 26 are supplied to each trough 25. A sand collecting water discharge port 28 for discharging to the most upstream part and an opening / closing door 29 for opening and closing the sand collecting water discharge port 28 are provided.
  The sand pumping means 30 for pumping the sand collected in the pits 11 and 21 to the upper part of the sand basins 10 and 20 has sand sink suction pipes 31a and 31b each having a lower end extending to the pits 11 and 21, respectively. A sand settling tank 33 connected to each sand settling pipe 31a, 31b via a sand pumping valve 32a, 32b, an ejector 35 for sucking fluid in the sand settling tank 33 from the decompression path 34, and each settling tank A water tank 36 provided above the water surfaces 10 and 20, a pump 37 that boosts and sends out the water in the water tank 36, and water that has been pressurized by the pump 37 is supplied to the ejector 35 as driving water. Drive water supply path 38, waste water supply path 39 for supplying the water boosted by the pump 37 to the sand settling tank 33 as waste water, and water for returning the water discharged from the ejector 35 to the water storage tank 36 A return path 40; The sand sink discharge path 41 for discharging the sand settling from the sand settling tank 33 accompanied by the sand discharge supplied from the sand discharge water supply path 39, and the sand settling in the sand discharge water discharged to the sand settling discharge path 41, And a sand settling machine 42 for separating water.
Further, in the sand settling treatment facility shown in the present embodiment, there is provided a residue separating and dewatering machine 43 for separating the residue collected by the dust remover 14 and collected in the collection tank 14a and performing a dehydration process. Wherein the collection tank 14a, the sand to be connected to the reservoir 33 residue collection path 44 is provided, from sand discharge path 41, Ru Tei and branches residue processing path 45 to be connected to渣分leaving water machine 43 . Further, there is provided a separated water return path 46 for returning the water from which the sand has been separated by the sand set separator 42 and the water from which the residue has been separated by the residue separator dewatering machine 43 to the water storage tank 36 via the water return path 40. It has been.
  As shown in FIG. 4, the sand settling pipes 31a and 31b that suck up the sand settling from the pits 11 and 21 of the sand settling basins 10 and 20 swing in the width direction of the sand settling basin using the upper portions of the sand settling pipes 31a and 31b as fulcrums. A rocking-type sedimentation suction pipe that can be formed is used. The bottom surfaces 11a and 21a of the pits 11 and 21 are formed in an arc shape corresponding to the locus drawn by the lower ends of the sand-sinking suction pipes 31a and 31b at the time of swinging.
  In the sand settling facility having such a configuration, both the water stop gates 13 of the sewage sand settling basin 10 are normally opened, and the water stop gate 23 of the rainwater settling basin 20 is operated in a closed state except during rainy weather. The sewage from the sewer or the like passes through the water stop gate 13 on the upstream side and flows into the sewage sand basin 10 after the suspended matter and coarse dust are removed by the dust remover 14. In the sewage sedimentation basin 10 whose width direction has expanded compared with the inflow part, the sediment in the sewage sinks toward the bottom of the ground due to a decrease in the flow velocity, and is separated from the sewage. The sewage from which the earth and sand have been separated is sent to the next wastewater treatment facility through the water stop gate 13 on the downstream side.
  Further, when the amount of water increases in rainy weather in the combined sewer, the water stop gate 23 of the rainwater settling basin 20 is opened and sewage flows into the rainwater settling basin 20. Also in the rainwater settling basin 20, the sediment in the sewage is settled and separated by the decrease in the flow velocity, and the sewage from which the sediment has been separated is sent to the wastewater treatment facility in the same manner as described above.
  Sand collected on the bottom of the sewage sand basin 10 is collected in the pit 11 by the underwater sand collecting device 12 and then discharged from the sewage sand basin 10 by the sand settling pipe 31 a of the sand lifting means 30. First, sand collection by the underwater sand collection device 12 is performed by opening the water supply valve 36V of the water storage tank 36 and the sand collection water supply valve 18V of the sand collection water supply pipe 18 and collecting the water in the water storage tank 36 as sand collection water. Supply from the supply pipe 18 to the lower gradient side of the water supply passage 16. The sand collection water supplied to the lower slope side of the water supply passage 16 is sequentially discharged from the sand collection water nozzle 19 located on the lower slope side of each trough body 17, and the sediment deposited on the upper surface of the trough body 17 is used as the slope. It flows down toward the pit 11 in order from the lower side.
  Thus, by letting it flow down from the lower gradient side, the accumulated sand can be smoothly made to flow into the pit 11 little by little. Further, the sand collecting water may be supplied simultaneously from the sand collecting water supply pipe 18 to all the water supply passages 16 so as to collect the sand to all the troughs on the trough body 17. A large amount of sand collection water is supplied to one trough by supplying the sand collection water sequentially to each of the water supply passages 16 which are branched into a plurality through valves and are appropriately assembled or one by one. Therefore, even if the sand collection water has a low pressure, the sand settling on the trough can surely flow down toward the pit 11.
  In addition, when collecting the sediment deposited on the bottom of the rainwater settling basin 20 into the pit 21, the water stop gate 23 is closed to block the inflow of sewage, and then the sewage in the rainwater settling basin 20 is discharged and then dry collection is performed. The sand device 22 is activated. For sand collection by the dry sand collecting device 22, the water supply valve 36V of the water storage tank 36 and the sand collection water supply valve 27V of the sand collection water supply pipe 27 are opened, and the water in the water storage tank 36 is used as sand collection water. 27 is supplied to the water supply passage 26, and the opening / closing door 29 is opened by the opening / closing door opening / closing device 29 a, and sand collection water is discharged from the sand collection water discharge port 28 onto the upper surface of the trough 25.
  In this rainwater settling basin 20, sand collection is performed in a state where water is not accumulated in the trough 25, so that the sand collected on the trough 25 is simply dropped from the top of the trough 25 in the inclined direction, and the sediment deposited on the trough 25 is pit 21. Can flow down. Also in the rainwater settling basin 20, all the doors 29 may be opened to collect sand collecting water simultaneously to all the troughs 25, and each trough 25 may be opened by opening each door 29 in order. A large amount of sand collection water may be allowed to flow down every time.
  The sand collected in each of the pits 11 and 21 is sucked up from the pits 11 and 21 by operating the sand lifting means 30 and discharged from the sewage sand basin 10 and the rainwater sand basin 20. Sanding by the sanding means 30 is performed according to the following operation procedure.
  First, a depressurization operation is performed to depressurize the sedimentation tank 33 to a predetermined pressure. In this decompression operation, the decompression valve 34V of the decompression path 34, the ejector operation valve 38V and the ejector outlet valve 35V of the drive water supply path 38 are opened and the other valves are closed, and the water in the water storage tank 36 is pumped. The pressure is increased at 37 and supplied to the ejector 35 through the drive water supply path 38 as drive water. As a result, the suction action of the ejector 35 sucks the air in the sand settling tank 33 through the pressure reducing path 34 and the inside of the sand settling tank 33 is depressurized. The gas-liquid mixed water discharged from the ejector 35 circulates in the water storage tank 36 through the water return path 40 and is reused after separating the air.
  After the pressure inside the sand settling tank 33 is sufficiently reduced by the pressure reducing operation, the pump 37 is stopped and all the valves are closed, and then only the sand pumping valve corresponding to the pit for sanding is opened and the sand settling operation is performed. I do. For example, when sucking sand from the pit 11 of the sewage sedimentation basin 10, the sand collection collected in the pit 11 due to the pressure difference between the sand sediment storage tank 33 and the pit 11 by opening the sand lift valve 32a of the sand sediment suction pipe 31a. Is sucked together with water into the sand settling suction pipe 31a, and the sand settling water is sucked up into the sand settling storage tank 33 from the sand settling suction pipe 31a. Since the sand sediment suction operation starts in a state where the inside of the sand sediment storage tank 33 is sufficiently depressurized in advance, the pressure difference between the sand sediment storage tank 33 and the pit 11 can be increased, and the sand sediment is sucked into the sand sediment suction pipe with a strong suction force. 31a can be sucked up, and relatively large gravel, pebbles and the like can be sucked up into the sand settling tank 33 with certainty. Further, the sand sink suction pipe 31a can be swung up from the entire pit 11 by swinging the lower end of the pit 11 in the width direction. Further, during the sand sediment suction operation, the decompression operation for exhausting the sand sediment storage tank 33 without stopping the pump 37 and without closing the decompression valve 34V, the ejector operation valve 38V and the ejector outlet valve 35V is performed. It may be continued.
After the sand suction operation is performed, a sand discharge operation is performed in which the sand sediment stored in the sand sediment storage tank 33 is sent to the sand sediment separator 42. In this sand removal operation, the sand discharge water supply valve 39V of the sand discharge water supply path 39 and the sand discharge valve 41V of the sand settling discharge path 41 are opened with the other valves closed, and the pump 37 is operated to store the water tank. The water in 36 is supplied into the sand settling tank 33 from the wastewater supply path 39 as wastewater. As a result, the sand settling in the sand settling tank 33 is accompanied by the sand discharge water and discharged to the sand settling path 41 and sent to the hopper 42a of the sand settling machine 42. After completion of the sand discharge operation, the pump 37 is stopped and the sand discharge water remaining in the sand settling tank 33 is discharged from a drain or the like separately provided. In this embodiment, the water separated from the sand by the sand settling machine 42 passes through the separated water return path 46 via the screen separator dewatering machine 43, and is returned to the water storage tank 36 through the water return path 40. The
  By opening the sand pumping valve 32b of the sand settling suction pipe 31b instead of the sand pumping valve 32a of the sand settling suction pipe 31a by the sand settling operation, the sand collected in the pit 21 of the rainwater settling basin 20 is sucked up by the same operation as described above. Can be discharged. In addition, when the sand collection valve 32a and the sand collection valve 32b are closed and the residue collection valve 44V of the residue collection path 44 is opened, the residue in the collection tank 14a can be sucked into the sand settling tank 33.
  By forming the sand collecting and sand lifting as described above, the decompression operation only needs to be able to sufficiently decompress the sedimentation tank 33 over a relatively long time, so that the pump 37 and the ejector 35 can be used. A small-sized thing can be used and an installation cost and energy consumption can be reduced significantly compared with the conventional sand pump. Furthermore, by using the water in the water storage tank 36 provided at the upper part of the two sewage sedimentation basins 10 as the sand collection water by the head difference, the sedimentation sediment deposited on the bottom of the pond is not rolled up and the sand collection efficiency is improved. Can do.
  Further, a pressurized water supply path 47 connected from the discharge side of the pump 37 to the downstream side of the water supply valve 36V is provided, and the pump 37 is operated while the water supply valve 36V is closed at the time of sand collection. By opening the pressurized water supply valve 47V, the water pressurized by the pump 37 can be supplied as sand collection water. In this case as well, the pressure is increased by a small-capacity pump 37 for decompressing the sedimentation tank 33 via the ejector 35, compared to a large-capacity pump for obtaining conventional pressure water for sand lifting. Therefore, it rarely rolls up the sand at the bottom of the pond.
  In FIG. 1, the main sewage sand basin 10 is shown on the upper side, and the subordinate storm water sand basin 20 is shown on the lower side. Thus, since the sewage in the rainwater settling basin 20 can be discharged to the sewage settling basin 10 under a natural flow, the drainage of the sewage from the rainwater settling basin 20 can be easily performed, and a pump for drainage can also be omitted. Further, when the rainwater settling basin 20 is provided at a high position, the water head difference between the water storage tank 36 and the sewage settling basin 10 becomes large. Therefore, the pressure of the sand collecting water supplied to the underwater sand collecting device 12 is set to dry sand collecting. It can be made higher than the pressure of the sand collecting water of the apparatus 22, and it becomes possible to obtain sufficient sand collecting ability without carrying out water supply by a pump.
  DESCRIPTION OF SYMBOLS 10 ... Wastewater settling basin, 11 ... Pit, 12 ... Underwater sand collecting device, 13 ... Water stop gate, 14 ... Dust remover, 14a ... Collection tank, 15 ... Trough foundation, 16 ... Water supply passage, 17 ... Trough main body, 18 ... Sand collecting water supply pipe, 19 ... Sand collecting water nozzle, 20 ... Rain water settling basin, 21 ... Pit, 22 ... Dry sand collecting device, 23 ... Water stop gate, 24 ... Dust remover, 25 ... Trough, 26 ... Water supply passage, 27 ... Sand collecting water supply pipe, 28 ... Sand collecting water discharge port, 29 ... Opening / closing door, 29a ... Opening / closing door opening / closing device, 30 ... Sanding means, 31a, 31b ... Sand sink suction pipe, 32a, 32b ... Sand raising valve, 33 ... Sand sediment storage tank, 34 ... Depressurization path, 35 ... Ejector, 36 ... Water storage tank, 37 ... Pump, 38 ... Drive water supply path, 39 ... Waste water supply path, 40 ... Water return path, 41 ... Sand discharge path 42 ... Sediment separator, 42a ... Hopper, 43 ... Sediment separation and removal Machine, 44 ... and residue collection path, 45 ... and residue processing path, 46 ... separated water return path, 47 ... boosting water supply channel

Claims (3)

  1. In the sand settling facility comprising a sewage settling basin into which sewage flows continuously and a stormwater settling pond into which sewage flows in in the rain, each sand settling basin is provided with a sand collecting means and a sand lifting means. In the sewage sedimentation basin, an underwater sand collection device that collects sand in a state where inflow sewage is stored in the pond. A device is provided, and a water storage tank is disposed above the water surface of each sand basin, and the underwater sand collection device and the dry sand collection device each have a plurality of collections that collect sand using the flowing water flowing down from the water storage tank. The sand lifting means provided in each sand basin provided with a sand water outflow portion is provided in each sand basin, and each sand sink suction pipe for sucking the sand collected by each sand collecting means, Each connected via a sand pump A sand storage tank, an ejector that sucks fluid in the sand settling tank through a fluid discharge valve, a pump that boosts and supplies water in the water storage tank to the ejector and the sand settling tank, and the pump And an ejector drive water supply path connecting the ejector via an ejector operating valve, a sand discharge water supply path connecting the pump and the sand settling tank via a sand discharge water supply valve, and the sand discharge water A sedimentation discharge path for discharging the settling sand from the settling tank with the sand discharge water supplied from the supply path, and a sand settling separator for separating the settling water and the water in the settling water discharged to the settling discharge path. And a water return path for returning the water separated by the sand settling machine to the water storage tank, and the sand collecting water outflow part of the underwater sand collecting device uses the pump to flow down the water flowing down from the water storage tank. precipitation of pressurized water to said Rukoto supplied Processing equipment.
  2. A dust remover provided on the upstream side of the sewage sedimentation basin, a collection tank for collecting the residue collected by the dust remover, a residue collection path connecting the collection tank and the sand storage tank, and a residue it was separated performing dehydration treatment and a渣分leaving water machine, according to claim 1, characterized that you have residue processing path is provided to connect to渣分leaving fountains and branches from the sand discharge path The described sedimentation facility.
  3. In the sand settling facility comprising a sewage settling basin into which sewage flows continuously and a stormwater settling pond into which sewage flows in in the rain, each sand settling basin is provided with a sand collecting means and a sand lifting means. In the sewage sedimentation basin, an underwater sand collection device that collects sand in a state where inflow sewage is stored in the pond, and in the rainwater sedimentation pond, dry sand collection that collects sand in a state in which the sewage flowing into the pond is discharged A device is provided, and a water storage tank is disposed above the water surface of each sand basin, and the underwater sand collection device and the dry sand collection device each have a plurality of collections that collect sand using the flowing water flowing down from the water storage tank. The sand lifting means provided in each sand basin provided with a sand water outflow portion is provided in each sand basin, and each sand sink suction pipe for sucking the sand collected by each sand collecting means, Each connected via a sand pump A sand storage tank, an ejector that sucks fluid in the sand settling tank through a fluid discharge valve, a pump that boosts and supplies water in the water storage tank to the ejector and the sand settling tank, and the pump And an ejector drive water supply path connecting the ejector via an ejector operating valve, a sand discharge water supply path connecting the pump and the sand settling tank via a sand discharge water supply valve, and the sand discharge water A sedimentation discharge path for discharging the settling sand from the settling tank with the sand discharge water supplied from the supply path, and a sand settling separator for separating the settling water and the water in the settling water discharged to the settling discharge path. And a water return path for returning the water separated by the sand settling separator to the water storage tank, and a dust remover provided on the upstream side of the sewage sand settling basin, and collecting the residue collected by the dust remover Connect the recovery tank, the recovery tank, and the settling tank It is provided with a residue collection path, a residue separation dehydrator that separates residue and a residue separation dehydrator, and a residue treatment path that is branched from the sedimentation discharge path and connected to the residue separation and dehydrator is provided. precipitation sand processing equipment shall be the features a.
JP2012087204A 2012-04-06 2012-04-06 Sand settling equipment Active JP5944721B2 (en)

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JP6027868B2 (en) * 2012-11-30 2016-11-16 前澤工業株式会社 Sand lifting equipment
CN104230095B (en) * 2014-01-20 2016-05-04 浙江青草地园林市政建设发展有限公司 A kind of outskirts of a town domestic sewage ecological cuts clean system
JP6276111B2 (en) * 2014-05-19 2018-02-07 前澤工業株式会社 Sediment transfer equipment and method
JP6349200B2 (en) * 2014-08-11 2018-06-27 前澤工業株式会社 Sand basin
JP2016185525A (en) * 2015-03-27 2016-10-27 住友重機械エンバイロメント株式会社 Sedimentary sand concentrator and sedimentary sand separation system

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JP5540230B2 (en) * 2007-06-06 2014-07-02 アクアインテック株式会社 Sand collecting device and sand collecting method
JP5575545B2 (en) * 2010-05-26 2014-08-20 住友重機械エンバイロメント株式会社 Injection type sand pumping system
JP5638286B2 (en) * 2010-06-02 2014-12-10 前澤工業株式会社 Sanding device and method

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