JP6276111B2 - Sediment transfer equipment and method - Google Patents

Description

  The present invention relates to a residue transfer facility and method, and more particularly, to a residue transfer facility and method for transferring residue to a residue separation and dehydrator after removing and crushing the residue removed from influent wastewater.

  In the sewage treatment facility, the debris removed from the influent water by the debris removal device (dust remover) is crushed by the debris crusher, and then temporarily stored in the debris receiving tank with the appropriate amount of water. The residue (crushed residue) is pumped together with water and transferred from the residue receiving tank to a residue separation and dehydrator, and the residue after dehydration is transported out of the system (for example, see Patent Document 1). ). Further, as a sand lifting device for discharging sand settling in a sand settling basin, a sand lifting device that sucks sand into a sand settling tank that has been evacuated by an ejector is known (see, for example, Patent Document 2).

JP-A-11-199047 JP 2013-215656 A

  Sedimentation is sedimented in the water of the sedimentation basin, while sediment is a mixture of various substances, so there are those that float on water, those that settle, and those that float in water. It is mixed. Accordingly, the construction differs between the facility for transferring the sedimentation and the facility for transporting the residue, and the two cannot be used together. In the sewage treatment facility, it is necessary to install the sedimentation transportation facility and the residue transportation facility, respectively. For this reason, there existed a problem that equipment cost increased and it took time and maintenance.

  Therefore, the present invention provides a sediment transporting equipment and method capable of transferring the residue (crushed residue) from the residue receiving tank to the residue separating and dewatering machine, and capable of handling the suction and transfer of the sedimentation from the sedimentation pit. It is intended to provide.

  In order to achieve the above-mentioned object, the slag transfer equipment of the present invention removes and crushes the residue from the inflowing water, stores the slag, smashes the residue in the slag receiving tank, and transfers it to the slag separation and dehydrator. In the equipment, a residue suction tank is connected to the residue receiving tank through a residue suction pipe provided with a residue suction valve, and the air in the residue suction tank is exhausted above the residue suction tank. An ejector that sucks through a valve, an upper discharge path that discharges the residue mixed water in the residue suction tank through the upper drain valve, and air is introduced into the residue suction tank through the upper air introduction valve. An upper air introduction path is provided, a lower discharge path for discharging the residue mixed water in the residue suction tank through the lower drain valve at the lower part of the residue suction tank, and lower air introduction into the residue suction tank A lower air introduction path for introducing air through the valve, and the water in the water tank is pumped and ejected. An ejector drive water supply path for supplying the ejector via an operating valve; a drain water supply path for supplying water in the water storage tank into the residue suction tank via the pressure pump and a discharge water supply valve; A compressor that pumps air into the upper air introduction path and the lower air introduction path is provided.

  Furthermore, the residue transporting apparatus of the present invention sucks the sediment in the sedimentation pit that has settled from the inflow sewage in the sedimentation basin together with water through the sedimentation suction pipe equipped with a sedimentation suction valve into the residue suction tank. A sand sediment suction pipe is connected, and a sand sediment discharge path for discharging sand sediment from the residue suction tank through a sand discharge valve is connected to the bottom of the residue suction tank.

  Further, the residue transfer method of the present invention is a sealed container in which the residue is removed from the inflowing water and crushed, the residue is stored, the residue in the residue receiving tank is crushed and the residue is transferred to the residue separation and dehydrator. Comprising a residue suction tank, a decompression operation for decompressing the interior of the residue suction tank to a preset pressure, and crushing in the residue receiving tank within the residue suction tank A crushing and clogging suction operation for sucking a clog and a crushing clogging agitation operation and aspirating and storing the clogging and clogging in the clogging suction tank. After the operation and washing operation, the drainage water is supplied into the residue suction tank, the smashed residue floating above the residue mixture water is discharged and discharged from the upper part of the residue suction tank, and the residue is separated and dehydrated. The floating residue discharge operation to be transferred to the machine, and after the floating residue discharge operation is completed, Crushing sediment settled in the section, discharging it from the lower part of the residue suction tank and transferring it to the residue separator dehydrator, and after finishing the settled residue discharge operation, the upper part of the residue suction tank It is characterized by carrying out a floating residue discharging operation in which the residue mixed water in the residue suction tank is discharged by the air introduced from and discharged from the lower portion of the residue suction tank and transferred to the residue separation and dehydrator.

  According to the present invention, the crushed debris sucked into the debris suction tank and floated against the water in the debris mixed water is collected by the drain water supplied from the drain water supply path into the debris suction tank. The crushed debris that can be discharged to the upper discharge path at the upper part of the tank and settled against the water can be discharged to the lower discharge path at the lower part of the debris suction tank by the discharged water. In addition, by introducing air into the residue suction tank through the upper air introduction path, the entire amount of residue mixed water in the residue suction tank can be discharged from the lower discharge path, floating in the residue mixed water. The crushing residue can be reliably transferred to the residue separation and dehydrator. Furthermore, after sucking the residue mixed water into the residue suction tank, air is introduced from the lower air introduction path and agitated, so that the residue can be removed by crushing and washing the residue. Furthermore, the sand settling pit can be transferred by connecting the sand settling pipe and the settling discharge path to the residue suction tank.

It is a systematic diagram which shows one example of the residue transfer equipment of this invention.

  For example, the debris transfer facility shown in the present embodiment is configured to remove debris removed from inflow water by a debris removal device (dust remover) provided on the upstream side of a sand basin or first sedimentation basin of a sewage treatment facility or a water intake facility. This is a facility for crushing with a residue crusher 11 together with an appropriate amount of water and temporarily storing the residue (crushed residue) in a residue receiving tank 12 and transferring it to a residue separator dehydrator 13.

  The slag transfer facility is provided with a scum suction tank 14 for sucking and storing the smashed scum in the slag receiving tank 12 together with water. The upper part of the residue suction tank 14 which consists of a sealed container is provided with an ejector 15 for sucking the air in the residue suction tank 14 through the exhaust valve 15a, and the residue mixed water in the residue suction tank 14 is an upper drain valve. An upper discharge path 16 that discharges through 16a and an upper air introduction path 17 that introduces air into the residue suction tank 14 through an upper air introduction valve 17a are provided. Further, at the lower part of the residue suction tank 14, a residue suction pipe 18 connected to the residue reception tank 11 via a residue suction valve 18a, and the residue mixed water in the residue suction tank 14 are connected to the lower drain valve. A lower discharge path 19 that discharges through 19a and a lower air introduction path 20 that introduces air into the residue suction tank 14 through a lower air introduction valve 20a are provided.

  Further, the water in a water storage tank 21 provided separately from the residue suction tank 14 is pressurized by a pumping pump 22 and supplied to the ejector 15 via an ejector operating valve 23a, and the water storage The water in the tank 21 is pressurized by the pumping pump 22 and supplied to the residue suction tank 14 via the discharged water supply valve 24a, and the upper air introduction path 17 and the lower air introduction path. A compressor 25 that pumps air to 20 is provided.

  Further, in the residue transfer equipment shown in the present embodiment, a drain path 26 for discharging residual water in the residue suction tank 14 through the drain valve 26a and a sand sink pit in the lower part of the residue suction tank 14 are provided. The sand settling pipe 27 for sucking the sand settling into the residue suction tank 14 through the sand settling intake valve 27a, and the sand settling for discharging the sand settling from the lower part of the residue set suction tank 14 to the sand set separator 29 via the sand discharge valve 28a. A discharge path 28 is provided. Further, a driving water return path 30 is provided for circulating the gas-liquid mixed water discharged from the ejector 15 to the water storage tank 21 and reusing it after separating the air.

  The upper discharge path 16 and the lower discharge path 19 are connected to the crushing / separation dewatering machine 13 by crushing and crushing the crushing / clogging transfer path 31 provided with the clogging transfer valve 31a. When the 28 and the sedimentation separator 29 are not provided, the crushing residue transfer valve 31a is not necessary.

  Next, the procedure for crushing the residue from the residue receiving tank 12 to the residue separating and dewatering machine 13 and transferring the residue using the residue transfer equipment will be described. First, a depressurization operation is performed to depressurize the residue suction tank 14 to a preset pressure. In this depressurization operation, the exhaust valve 15a and the ejector operating valve 23a are opened and the other valves are closed, and the water in the water storage tank 21 is boosted by the pressure pump 22 and ejected via the ejector drive water supply path 23. 15 is supplied as driving water. Thereby, the air in the residue suction tank 14 is sucked through the exhaust valve 15a by the suction action of the ejector 15, and the residue suction tank 14 is decompressed.

  After the pressure inside the residue suction tank 14 is sufficiently reduced by the pressure reduction operation, the pressure feed pump 22 is stopped and all the valves are closed. Then, the residue suction valve 18a is opened, the residue receiving tank 12 is set as the residue suction tank 12. The crushing residue in the residue receiving tank 12 is sucked into the residue suction pipe 18 together with water and transferred into the residue suction tank 14 by the pressure difference from the inside 14 and the residue removal operation is performed.

  Since this crushing and residue suction operation starts in a state in which the residue suction tank 14 is sufficiently decompressed in advance, the pressure difference between the residue suction tank 14 and the residue receiving tank 12 can be increased, and the suction force can be increased. The residue can be crushed and collected and sucked into the residue suction pipe 18. The residue having high specific gravity can be crushed and the residue can be reliably sucked into the residue suction tank 14. Furthermore, by crushing pressure water for stirring into the bottom of the residue receiving tank 12, or by appropriately moving the sand settling pipe 31a, the residue can be efficiently crushed and sucked up. . Further, during this crushing and residue suction operation, the pressure reduction pump for evacuating the residue suction tank 14 is continued without stopping the pumping pump 22 and without closing the exhaust valve 15a and the ejector operation valve 23a. You may do it.

  After crushing and crushing by residue suction operation and leaving residue in the residue suction tank 14, after closing the residue suction valve 18a, the compressor 25 is operated with the exhaust valve 15a opened and the lower part The air introduction valve 20a is opened, air is introduced into the lower part of the residue suction tank 14 from the lower air introduction path 20, and the residue mixed water in the residue suction tank 14 is stirred to be crushed and adhered to the residue. A cleaning operation is performed to remove water-soluble components and dirt components.

  Next, the lower air introduction valve 20a and the exhaust valve 15a are closed and the compressor 25 is stopped to finish the cleaning operation, the pumping pump 22 is activated, the drainage water supply valve 24a, the upper drain valve 16a and the crushed residue. The transfer valve 31a is opened, and the crushed residue with a small specific gravity floating above the residue mixed water in the residue suction tank 14 by the discharged water supplied from the discharge water supply path 24 to the residue suction tank 14 is discharged to the upper part. It is discharged from the path 16, crushed, passed through the residue transfer path 31, and transferred to the residue separator dehydrator 13.

  Subsequently, the upper drain valve 16a is closed and the lower drain valve 19a is opened, and a large specific gravity crushed residue settled on the bottom of the residue mixed water in the residue suction tank 14 is discharged from the lower discharge path 19 by the discharged water. The sedimentation operation is performed by discharging, crushing, passing through the residue transfer path 31 and transferring to the residue separation and dehydrator 13. After closing the lower drainage valve 19a and the drainage water supply valve 24a, stopping the pumping pump 22 to settle and finishing the residue discharging operation, the compressor 25 is activated and the upper air introduction valve 17a and the lower drainage valve 19a are opened. By the air introduced into the residue suction tank 14 from the upper air introduction path 17, the residue mixed water in the residue suction tank 14 is discharged from the lower discharge path 19 together with the crushed residue suspended in the mixed water. Then, a floating residue discharging operation is performed in which the particles are crushed and transferred to the residue separator dehydrator 13 through the residue transfer path 31. After all the residue mixed water in the residue suction tank 14 is discharged, the upper air introduction valve 17a and the lower drain valve 19a are closed, and the compressor 25 is stopped.

  In this way, by the discharged water supplied by the pressure feed pump 22, a floating residue discharging operation is performed in which the small specific gravity crushed residue remaining at the top of the residue mixed water is first transferred to the residue separating and dehydrating machine 13. Next, the sediment having a large specific gravity settled at the bottom of the residue mixed water is crushed and the residue is discharged to transfer the residue. Finally, the air introduced from the upper air introduction path 17 is used to discharge all the residue mixed water. By performing the residue discharge operation, the entire amount of residue that is crushed with different specific gravity can be transferred from the residue suction tank 14 to the residue separation and dehydrator 13 with certainty. Also, after crushing and sucking the residue in the residue suction tank 14, the impurities mixed in the residue are removed by crushing the residue mixed water by the air introduced from below and crushing and washing the residue. The amount of impurities contained in the dewatered residue obtained from the residue separation and dehydrator 13 can be reduced.

  Further, in the scum transport facility shown in this embodiment, after the pressure reducing operation is performed, the sand settling suction valve 27a is opened, and the sand settling in the sand settling pit is sucked into the settling suction tank 14 through the sand settling suction pipe 27 and necessary. After that, the lower drain valve 19a and the sand drain valve 28a are opened, the drain water is introduced into the residue suction tank 14 from the drain water supply path 24, and the upper air introduction path 17 is used. By introducing air into the residue suction tank 14, the sand settling in the residue suction tank 14 can be transferred to the sand set separator 29 through the lower discharge path 19 and the settling discharge path 28. Therefore, by providing the residue transfer equipment shown in this embodiment, it is possible to combine the transfer of residue and the transfer of sedimentation, so that it is possible to omit the sedimentation equipment and the equipment configuration of the sewage treatment equipment The initial cost can be greatly reduced.

  In addition, the screen residue crusher, the screen residue receiving tank, the screen residue separating and dewatering machine, and the sewage treatment facility are not particularly limited, and the volume of the screen residue suction tank is appropriately set according to the scale of the sewage treatment facility. be able to. The operation of the pressure feed pump and the compressor and the opening and closing of each valve can be performed manually or automatically based on a preset procedure. Furthermore, depending on conditions such as the state of the residue receiving tank and the ability of the ejector, the decompression operation and the crushing and residue suction operation can be performed simultaneously.

DESCRIPTION OF SYMBOLS 11 ... Sediment crusher, 12 ... Sediment receiving tank, 13 ... Sediment separation dehydrator, 14 ... Sediment suction tank, 15 ... Ejector, 15a ... Exhaust valve, 16 ... Upper discharge path, 16a ... Upper drain valve, DESCRIPTION OF SYMBOLS 17 ... Upper air introduction path | route, 17a ... Upper air introduction valve, 18 ... Slag intake pipe, 18a ... Slag intake pipe, 19 ... Lower discharge path, 19a ... Lower drain valve, 20 ... Lower air introduction path, 20a ... Lower part Air introduction valve, 21 ... Water storage tank, 22 ... Pressure feed pump, 23 ... Ejector drive water supply path, 23a ... Ejector operation valve, 24 ... Discharge water supply path, 24a ... Discharge water supply valve, 25 ... Compressor, 26 ... Drain Route, 26a ... Drain valve, 27 ... Sedimentation suction pipe, 27a ... Sedimentation suction valve, 28 ... Sedimentation discharge route, 28a ... Sedimentation valve, 29 ... Sediment separator, 30 ... Drive water return route, 31 ... Fracture and residue transfer Path, 31a ... crushing residue transfer valve

Claims (3)

  It is removed from the inflowing water and crushed, the residue is stored, the residue in the residue receiving tank is crushed and the residue is transferred to the residue separating and dewatering machine. In the residue transfer facility, the residue receiving tank is equipped with a residue suction valve. A residue suction tank is connected via a residue suction pipe, and an ejector that sucks the air in the residue suction tank through an exhaust valve is provided above the residue suction tank, and a residue in the residue suction tank. An upper discharge path for discharging the residue mixed water through the upper drain valve and an upper air introduction path for introducing air into the residue suction tank through the upper air introduction valve are provided, And a lower discharge path for discharging the residue mixed water in the residue suction tank through the lower drain valve and a lower air introduction path for introducing air into the residue suction tank through the lower air introduction valve An ejector drive for supplying water in the water reservoir to the ejector via a pressure pump and an ejector operating valve Air is supplied to the water supply path, the drain water supply path for supplying water in the water storage tank into the residue suction tank through the pressure pump and the discharge water supply valve, and the upper air introduction path and the lower air introduction path. A residue transporting facility characterized by comprising a compressor for pressure-feeding.   The sediment suction tank is connected to a sedimentation suction pipe that sucks the sedimentation in the sedimentation pit settled from the inflowing sewage in the sedimentation pond together with water through a sedimentation suction pipe equipped with a sedimentation suction valve. 2. The sediment transporting equipment according to claim 1, wherein a sand sediment discharge path for discharging sand sediment from the residue suction tank via a sand discharge valve is connected to a lower portion of the suction tank.   In the method for transferring residue to the residue separator dehydrator, the residue is crushed after being removed from the inflowing water and stored, and the residue in the residue receiving tank is transferred to the residue separator and dehydrator. A depressurization operation for depressurizing the inside of the debris suction tank to a preset pressure, and a debris debris suction operation for depressurizing the debris suction tank and sucking the debris in the debris receiving tank into the debris suction tank. , Crushing the residue, sucking and storing the residue in the residue suction tank, introducing the air from below the residue mixed water, stirring the residue mixed water, and finishing the washing operation Supplying discharged water into the suction tank and crushing the floating residue above the residue mixed water, discharging the residue from the upper portion of the residue suction tank, and transferring it to the residue separator dehydrator, After the floating and drainage operation is finished, the drained water is used to crush the sediment that has settled at the bottom of the residue mixed water. The settling sediment discharge operation which is discharged from the lower part of the suction tank and transferred to the residue separation dewatering machine, and the air in the residue suction tank is removed by the air introduced from the upper part of the residue suction tank after the sedimentation and sediment discharge operation is completed. A debris transfer method characterized by performing a floating debris discharge operation in which debris mixed water is discharged, discharged from the lower portion of the debris suction tank, and transferred to a debris separator and dehydrator.

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