JP3606092B2 - Sediment transfer equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pumping device for pumping and collecting collected residue from a sewage treatment tank such as a sand basin in a sewage treatment facility by a dust remover to a next process, and a pumping device. The dewatering equipment provided with the dewatering machine has a dewatering machine, and the dewatering function can be prevented from being deteriorated due to clogging of the dewatering machine. Therefore, the present invention relates to a residue transporting facility that can efficiently perform residue dewatering treatment.
[0002]
[Prior art]
Normally, sewage and rainwater (hereinafter collectively referred to as sewage) are sent to a sand basin as a sewage treatment tank for sewage treatment facilities, where sand and sediment (wood pieces, paper pieces, vinyl pieces) , Sewage floating materials such as cloth pieces and dead leaves) are removed, and then, for example, discharged into a river or sent to the next processing step.
[0003]
Hereinafter, a conventional residue transporting facility will be described with reference to the drawings.
[0004]
FIG. 3 is a partial schematic plan view showing a sand basin portion in a sewage treatment facility, FIG. 4 is a schematic front view showing a dust remover installed in the sand basin, and FIG. 5 is a partial schematic view showing a conventional residue transporting facility. FIG. 6 is a front view, FIG. 6 is a schematic front view showing a dehydrator in a conventional residue transporting facility, and FIG. 7 is a schematic cross-sectional view showing a piston pump.
[0005]
3 to 7, reference numeral 1 denotes a sand basin for slowly flowing sewage and settling and removing sand in the sewage in the course of this flow. The sand basin 1 is installed in parallel in a plurality of rows (5 rows in this example) in the basement. 1A is a sewage inflow port, and 1B is a sewage drain. Reference numeral 2 denotes a dust remover installed on the downstream side of each sand basin 1 for scraping the residue 3 in the sewage out of the sand basin 1. As shown in FIG. 4, the dust remover 2 is installed on the upstream side of the screen 4 provided across the width direction of the sand settling basin 1 and circulates endlessly by a motor 5 to remove sediment 3 in the sewage from the sand settling basin. 1 has a scraper 6 for scraping outside.
[0006]
7 is a conveyor for transporting the residue for collecting the residues 3 scraped by the dust remover 2 and transporting them to a pressure feeding device described later. The residue transporting conveyor 7 has a first conveyor 8 for collecting the residue 3 scraped by each dust remover 2 and a residue for conveying the residue collected by the first conveyor 8 to the pressure feeding device. It consists of a second conveyor 9. The 1st and 8th conveyors 8 and 9 consist of a chain conveyor, a belt conveyor, a flight conveyor, etc.
[0007]
Denoted at 10 is a residue transporting facility for pressure-feeding the residue 3 conveyed by the conveyor 7 to the residue storage hopper 11 on the ground. The residue transporting equipment 10 includes a pressure feeding device 12 including a piston pump, and a dehydrator 14 provided in the middle of the residue pressure feeding pipeline 13 of the pressure feeding device 12. The dehydrator 14 removes moisture contained in the residue 3 and reduces the amount of residue 3 discharged from the residue storage hopper 11.
[0008]
As shown in FIG. 7, the piston pump includes a plunger 15 that reciprocates by a hydraulic mechanism, a chamber 16 in which the loaded residue 3 is conveyed forward by the plunger 15, and a gate valve 17 that opens and closes the chamber 16. When the plunger 15 is reciprocated and the gate valve 16 is opened and closed, the residue 3 fed into the chamber 16 from the intermediate hopper 18 is intermittently passed through the conduit 13 to the residue storage hopper 11 on the ground. Transport it. The piston pump has an advantage that the transported object can be reliably transported regardless of the transport path.
[0009]
As shown in FIG. 6, the dehydrator 14 is formed by forming a large number of drain holes 19 in a part of the pipe 18.
[0010]
According to the conventional residue transporting equipment configured as described above, the residue is transported to the residue storage hopper as follows.
[0011]
Sewage flows into the respective sand basins 1 from the inflow port 1 </ b> A and flows slowly through the sand basins 1. In the course of this flow, the sand 20 in the sewage settles and accumulates in the pit 1C at the bottom of the sand basin 1. The sand 20 deposited in the pit 1C is periodically lifted out of the sand basin 1 by a rake (not shown). When the sewage flows to the downstream side of the settling basin 1, the residue 3 in the sewage is scraped up by the scraper 6 of the dust remover 2. In this way, the sewage from which the sand 20 and the residue 3 have been removed is discharged from the drain 1B into, for example, a river or sent to the next processing step.
[0012]
On the other hand, the residue 3 scraped up by each dust remover 2 is conveyed to the pressure feeding device 12 by the first and second conveyors 8 and 9, and is pressure-fed to the residue storage hopper 11 by the pressure feeding device 12. During this time, water contained in the residue 3 is removed by the dehydrator 14. The residue 3 in the residue storage hopper 11 is transferred to, for example, an incinerator and incinerated.
[0013]
[Problems to be solved by the invention]
However, the above-described conventional residue transport equipment has the following problems. That is, since the dehydrator 14 is simply formed with a large number of drain holes 19 in the pipeline 13, the residue 3 adheres to the drain holes 19 and easily clogs, and loses the dehydrating function in a short time.
[0014]
Accordingly, an object of the present invention is to provide a pumping device for pumping the collected residue collected from a sewage treatment tank such as a sand basin in a sewage treatment facility by a dust remover to the next process, and a residue of the pumping device. It is possible to prevent a decrease in the dewatering function due to clogging of the dehydrator in the debris transport equipment having a dehydrator provided on the discharge side, and the passage time of the debris in the dehydrator according to the properties of the debris It is an object of the present invention to provide a residue transport facility that can be optimally controlled and thus can efficiently dewater the residue.
[0015]
The invention according to claim 1 is a pumping device for pumping the residue scraped from the sewage treatment tank in the sewage treatment facility to the next process, and a dehydrator provided on the residue discharge side of the pumping device. in residuum transport facility Shi having the dehydrator has an inclined bar screen, the water contained in and residue, and residue are separated from the process could residue sliding down on the inclined bar screen, dropped, the The dehydrator slides down on the inclined bar screen and detects the moving speed of the residue, and the inclination angle of the inclined bar screen based on the moving speed of the residue detected by the speed detecting means. And an angle adjusting means for adjusting the angle .
[0016]
The invention described in claim 2 is characterized in that the surface of the inclined bar screen is covered with an inverted triangular cap.
[0017]
The invention described in claim 3 is characterized in that the dehydrator has a vibration means for vibrating the inclined bar screen.
[0018]
The invention according to claim 4 is characterized in that the dehydrator has a cleaning means for cleaning the inclined bar screen by spraying water onto the inclined bar screen.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the residue transporting equipment of the present invention will be described with reference to the drawings.
[0021]
FIG. 1 is a partial schematic cross-sectional view showing a dehydrator in the residue transporting facility of the present invention, and FIG. 2 is a cross-sectional view showing an inclined bar screen covered with a cap.
[0022]
The present invention is obtained by replacing the dehydrator 14 with a dehydrator 21 having a structure as shown in FIG. 1 in the conventional residue transporting equipment shown in FIG.
[0023]
The dehydrator 21 has an inclined bar screen 24 made up of a large number of bars 22 connected in parallel by a large number of reinforcing members 23 at intervals.
[0024]
The residue 3 that has been pumped from the pumping device 12 through the pipe line 13 slides down on the inclined bar screen 24 by its own weight. In this process, water contained in the residue 3 is separated from the residue 3 and falls. In this way, the residue 3 is dehydrated. Since the residue 3 is gently pushed down by its own weight without being pressed against the bar 22 on the inclined bar screen 24, the inclined bar screen 24 is not easily clogged.
[0025]
As shown in FIG. 2, if each bar 22 of the inclined bar screen 24 is covered with a resin cap 25 having an inverted triangular cross section, the interval between the bars 22 increases from the upper surface to the lower surface of the bar 22. The drainage is good, and the blockage between the bars 22 due to the residue 3 is eliminated.
[0026]
If the dehydrator 21 is provided with a vibration means (not shown) for mechanically vibrating the inclined bar screen 24, for example, the removal of water adhering to the inner and outer surfaces of the residue 3 is promoted.
[0027]
If the dehydrator 21 is provided with cleaning means 26 such as a water jet nozzle for spraying water onto the inclined bar screen 24 to wash the inclined bar screen 24, and the inclined bar screen 24 is cleaned when the pumping device 12 is stopped, The residue 3 adhering to 22 can be easily removed. In this way, by updating the screen surface, the subsequent dewatering effect of the residue 3 is promoted.
[0028]
Further, the dehydrator 21 slides down on the inclined bar screen 24 and detects the moving speed of the residue 3, and the inclination is determined based on the moving speed of the residue 3 detected by the speed detecting means 27. If the angle adjusting means 28 for adjusting the inclination angle of the bar screen 24 is provided, the passage time of the residue on the inclination bar screen 24 can be optimally controlled according to the properties of the residue 3, and thus. The dewatering process of the residue 3 can be performed efficiently.
[0029]
The speed detection means 27 has, for example, a pair of sensors 29A and 29B for detecting the passage of the residue 3 provided on the inclined bar screen 24 with an interval between the upper and lower portions, and the sensors 29A and 29B. The moving speed of the residue 3 is detected based on the detection time difference of the residue 3. The sensors 29A and 29B use photoelectric tubes, ultrasonic waves, microwaves, or the like. Among these, those using microwaves are particularly preferable because microwaves have high transmission power and are not easily affected by dirt adhering to the detection surface.
[0030]
The angle adjusting means 28 is for tilting the inclined bar screen 24, the lower end of which is supported by the shaft 30, by the cylinder 31.
[0031]
Thus, by providing the dehydrator 21 with the cleaning means 26, the speed detecting means 27, and the angle adjusting means 28, the dewatering processing of the residue 3 can be performed efficiently as follows.
[0032]
Usually, the sludge 3 is dehydrated by setting the tilt angle (θ) of the tilt bar screen 24 to a tilt angle of about 45 degrees. The moving speed of the residue 3 on the inclined bar screen 24 is monitored by the speed detecting means 27. The moving speed of the screen residue 3 varies depending on the properties of the screen residue 3. When the moving speed of the residue 3 is faster than the set speed, the cylinder 31 is extended to reduce the tilt angle (θ) of the tilt bar screen 24. The set speed is a speed at which the residue 3 is sufficiently dehydrated. On the other hand, when the movement speed of the residue 3 is slower than the set speed, the cylinder 31 is contracted to increase the inclination angle (θ) of the inclined bar screen 24. As a result, the passage time of the screen residue on the inclined bar screen 24 can be optimized. That is, it is possible to prevent the residue and clogging phenomenon of the residue when the passage time becomes longer than necessary, and the phenomenon that the dehydration time is insufficient when the passage time becomes short. 3 can be efficiently performed.
[0033]
When washing the residue 3 adhering to the inclined bar screen 24, when the operation of the pumping device 12 is stopped, the cylinder 31 is extended to the maximum to tilt the inclined bar screen 24 horizontally. Then, cleaning water is sprayed from the cleaning means 26 onto the inclined bar screen 24 to wash the residue 3 attached to the inclined bar screen 24. Thereby, clogging of the inclined bar screen 24 is eliminated.
[0034]
【The invention's effect】
As described above, according to the present invention, the following useful effects are brought about.
[0035]
A pumping device for pumping the collected residue collected from a sewage treatment tank such as a sand basin in a sewage treatment facility to the next process, and a dehydrator installed on the residue discharge side of the pumping device In addition, the sludge bar screen is used as a dehydrator in the litter transport equipment, so that the dehydration function can be prevented from being deteriorated due to clogging of the dehydrator. It is possible to maintain the optimum passage time according to the properties of the residue by making it adjustable according to the passage speed of the screen, and further, by providing the cleaning means, clogging of the inclined bar screen can be prevented. The dewatering process of the residue can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a partial schematic cross-sectional view showing a dehydrator in a residue transport facility according to the present invention.
FIG. 2 is a cross-sectional view showing an inclined bar screen covered with a cap.
FIG. 3 is a partial schematic plan view showing a sand basin portion in a sewage treatment facility.
FIG. 4 is a schematic front view showing a dust remover installed in a sand basin.
FIG. 5 is a partial schematic front view showing a conventional residue transporting facility.
FIG. 6 is a schematic front view showing a dehydrator in a conventional residue transporting facility.
FIG. 7 is a schematic cross-sectional view showing a piston pump.
[Explanation of symbols]
1: Sand basin 1A: Inlet 1B: Outlet 1C: Pit 2: Dust remover 3: Screen residue 4: Screen 5: Motor 6: Scraper 7: Conveyor 8: First conveyor 9: Second conveyor 10: Screen transport Equipment 11: Sediment storage hopper 12: Pressure feeding device 13: Pipe line 14: Dehydrator 15: Plunger 16: Chamber 17: Gate valve 18: Intermediate hopper 19: Drain hole 20: Sand content 21: Dehydrator 22: Bar 23: Reinforcing material 24: Inclined bar screen 25: Cap 26: Cleaning means 27: Speed detecting means 28: Angle adjusting means 29A, 29B: Sensor 30: Shaft 31: Cylinder

Claims (4)

In a residue transporting facility comprising a pumping device for pumping the residue squeezed from a sewage treatment tank in a sewage treatment facility to the next process and a dehydrator provided on the residue discharge side of the pumping device,
The dehydrator has an inclined bar screen, and moisture contained in the residue is separated and dropped from the residue in a process in which the residue slides down on the inclined bar screen. A speed detecting means for detecting the moving speed of the residue that slides down and an angle adjusting means for adjusting the inclination angle of the inclined bar screen based on the moving speed of the residue detected by the speed detecting means A residue transporting facility characterized by comprising: 2. The residue transporting equipment according to claim 1, wherein the inclined bar screen is covered with a cap having an inverted triangular cross section. The slag transporting equipment according to claim 1 or 2, wherein the dehydrator has a vibration means for vibrating the inclined bar screen. The said dehydrator has a washing | cleaning means for spraying water on the said inclination bar screen, and wash | cleans the said inclination bar screen, It is any one of Claim 1 to 3 characterized by the above-mentioned. Waste transport equipment.

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