JP3481859B2 - Sewage treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a sewage treatment facility,
Especially, the maintenance and inspection work of the second transfer means for transferring the collected residue scraped off by the dust remover installed in each sand basin to the ground residue storage hopper can be easily performed, and 2 It is possible to prevent deterioration of the work environment due to odors and water leaks that occur when the residue is transferred by the transfer means,
Furthermore, the present invention relates to a sewage treatment facility in which the transfer path of the residue by the second transfer means can be freely set.

[0002]

2. Description of the Related Art Usually, sewage and rainwater (hereinafter collectively referred to as sewage) are sent to a sand basin of a sewage treatment facility,
After the sand content and residue (wood pieces, paper pieces, vinyl pieces, cloth pieces, dead leaves, etc. in the sewage) in the sewage are removed here,
For example, it is discharged into a river or sent to the next treatment process.

A conventional sewage treatment facility will be described below with reference to the drawings. 3 is a partial schematic plan view showing a conventional sewage treatment facility, FIG. 4 is a schematic front view showing a dust remover installed in a sand basin, and FIG. 5 is a partial schematic front view showing a conventional sewage treatment facility. is there.

In FIG. 3 to FIG. 5, reference numeral 1 denotes a sand basin for slowly flowing sewage and allowing the sand content in the sewage to settle and be removed in the course of this flow. The sand basin 1 is installed in multiple rows (5 rows in this example) in parallel underground. 1A
Is a sewage inflow port, and 1B is a sewage drainage port. 2 is a dust remover installed on the downstream side of each sand basin 1 for scraping out the residue 11 in the sewage to the outside of the sand basin 1.
The dust remover 2 is installed on the upstream side of the screen 3 provided across the width of the sand basin 1 and is an endless orbiter by the motor 4 for scraping scraps 11 in the sewage out of the sand basin 1. Have five.

The numeral 6 designates the residue 11 scraped out by the dust remover 2, which is installed on the ground to form a residue storage hopper 7
It is a residue transfer machine for transferring to. Screen transfer machine 6
Is a first conveying means 8 for collecting the screen residue 11 scraped out by each dust remover 2, and a plate for transferring the screen residue collected by the first transfer means 8 to the screen residue storage hopper 7 on the ground. The second transport means 9 is provided. First transport means 8
Is composed of a collective conveying means 8A and an intermediate conveying means 8B. The first conveying means 8 is composed of a conveyor such as a chain conveyor, a belt conveyor, a flight conveyor, etc.
The conveying means 9 comprises a conveyor such as a chain conveyor, a belt conveyor, a flight conveyor or a skip hoist.

According to the conventional sewage treatment facility constructed as described above, sewage is treated as follows. Sewage flows into each sand basin 1 from the inflow port 1A and slowly flows through the sand basin 1. In the course of this flow, the sand content 10 in the sewage settles and accumulates in the pit 1C at the bottom of the sand basin 1. The sand content 10 accumulated in the pit 1C is regularly scraped out of the sand basin 1 by a scraping machine (not shown). When the sewage flows to the downstream side of the sand basin 1, the residue 11 in the sewage
Are scraped out by the scraper 5 of the dust remover 2.
In this way, the sewage from which the sand content 10 and the residue 11 have been removed is discharged from the drain port 1B to, for example, a river or sent to the next treatment step.

On the other hand, the residue 11 scraped out by each dust remover 2 is transferred to the residue storage hopper 7 by the first transfer means 8 and the second transfer means 9. Then, the residue in the residue storage hopper 7 is conveyed to, for example, an incinerator and incinerated.

[0008]

However, the above-mentioned conventional sewage treatment facility has the following problems. As shown in FIG. 5, when the inclined conveyer is used as the second conveying means 9, the conveying distance becomes long, so that the construction cost is high. When a vertical conveyor or skip hoist is used, the transportation distance is shorter than that of an inclined conveyor, but since the transportation capacity is low, it is necessary to deal with large amounts of wastewater such as heavy rain that flow into the sand basin 1. I couldn't. Whether the inclined conveyor, the vertical conveyor, or the skip hoist is adopted as the second conveying means 9, the conveying path for the residue on the second conveying means 9 cannot be made complicated, and the conveying path for the residue is generated. Was heavily constrained. Even if the second conveying means 9 is provided with a cover or the like, it is not possible to completely prevent odor and water leakage, which deteriorates the working environment. Cleaning of the residue adhering to the second conveying means 9 or the second
It was necessary to frequently replace consumable parts of the transporting means 9. That is, it was necessary to frequently perform maintenance and inspection work.

Therefore, an object of the present invention is to convey the collected residue scraped by the dust remover installed in each sand basin to the residue storage hopper installed above the sand basin. Maintenance and inspection work of the second transfer means can be performed easily, and deterioration of the work environment due to odors and water leaks caused by the transfer of residue by the second transfer means can be prevented,
Another object of the present invention is to provide a sewage treatment facility in which the transfer route of the residue by the second transfer means can be freely set.

[0010]

The invention according to claim 1 is
The sewage is allowed to slowly flow, and a plurality of sand basins for sedimenting and removing sand in the sewage in the course of this flow, and the sewage residue set in each of the sand basins A dust remover for pulling out to the outside, a collection of the scraps scraped out by the dust remover, and a screening residue transporter for carrying to the screening residue storage hopper installed at a higher place than the sand basin,
The residue transporter is for transporting the residue collected by the dust remover to the residue transfer hopper and a first transfer means for collecting the residue collected by the dust remover. In a sewage treatment facility comprising a second transfer means, the second transfer means is constituted by an adjustment tank and a piston pump, and the residue collected by the first transfer means is introduced into the adjustment tank, The piston pump is characterized in that it is pressure-fed to the residue storage hopper, and the residue that exceeds the pressure-feeding capability of the piston pump is returned to the sand basin.

The invention according to claim 2 is characterized in that a crusher for crushing the residue to a size that can be pumped by the piston pump is provided. Claim 3
The described invention is characterized in that a water extractor is provided on the residue discharge side of the piston pump.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the sewage treatment facility of the present invention will be described with reference to the drawings. FIG. 1 is a partial schematic front view showing an embodiment of the sewage treatment facility of the present invention,
FIG. 2 is a schematic sectional view showing the piston pump.

The present invention is a conventional sewage treatment facility shown in FIGS. 3 to 5, that is, an underground facility for slowly flowing sewage and sedimenting and removing sand in sewage in the course of this flow. A plurality of sand basins 1 installed in the sand basin 1, a dust remover 2 installed on the downstream side of each of the sand basins 1 for scraping out the residue 11 in the sewage out of the sand basin 1, and a dust remover 2. It is provided with a screen residue carrier 6 for collecting the screened residue 11 and transferring it to the screen residue storage hopper 7 installed on the ground. The screen residue carrier 6 is scraped out by the dust remover 2. In a sewage treatment facility comprising a first transfer means 8 for collecting the residue 11 and a second transfer means 9 for transferring the residue 11 collected by the first transfer means 8 to the residue storage hopper 7, As shown in FIG. 1 and FIG. 2, the second transfer means 9 is connected to the adjusting tank 12 and the piston. Those constituted by a pump 13.

The adjusting tank 12 is for temporarily storing the residue transferred by the first transfer means 8. The residue stored in the adjusting tank 12 is sent to the piston pump 13 by the conveyor 14. In the case of heavy rain or the like, when an amount of the residue that exceeds the capability of the piston pump 13 to pump the residue is put into the adjusting tank 12, the excess residue is returned to the sand basin 1. As a result, the number of piston pumps 13 installed can be minimized. Water is replenished to the adjusting tank 12 at any time so that the conveyor 14 can smoothly convey the residue. The overflow make-up water is returned to the sand basin 1.

As shown in FIG. 2, the piston pump 13 includes a plunger 15 which reciprocates by a hydraulic mechanism,
The reciprocating motion of the plunger 15 includes a chamber 16 in which the thrown residue 11 is compressed by the plunger 15, a hopper 17 provided on the chamber 16, and a gate valve 18 for opening and closing the chamber 16. By opening and closing the gate valve 18, the residue 11 sent into the chamber 16 from the hopper 17 is intermittently conveyed to the residue storage hopper 7 through the pipe 19. The piston pump 13 has an advantage of being able to reliably convey the conveyed object regardless of the conveying path.

The hopper 17 is provided with a pusher 22 having a push rod that advances and retreats by a cylinder. Inside the hopper 17, the residue 11 constitutes a bridge and enters the chamber 16 of the residue 11. It is possible to prevent the delivery of the.

According to the present invention, sewage is treated as follows. Sewage flows into each sand basin 1 from the inflow port 1A and slowly flows through the sand basin 1. In the process of this flow,
The sand content 10 in the sewage settles down, and the pit 1 at the bottom of the sand basin 1
Deposit on C. The sand content 10 accumulated in the pit 1C is regularly scraped out of the sand basin 1 by a scraping machine (not shown). When the sewage flows to the downstream side of the sand basin 1, the scrap residue 11 in the sewage is scraped out by the scraper 5 of the dust remover 2. In this way, the sewage from which the sand content 10 and the residue 11 have been removed is discharged from the drain port 1B to, for example, a river or sent to the next treatment step.

On the other hand, the residue 11 scraped out by each dust remover 2 is transferred by the first transfer means 8 comprising a conveyor.
It is put into the adjusting tank 12 of the second conveying means 9. Adjusting tank 12
The residue 11 that has been introduced into the container is introduced into the hopper 17 of the piston pump 13 by the conveyor 14. The residue 11 put into the hopper 17 is sent into the chamber 16 in which the gate valve 18 is closed and then compressed by the advance of the plunger 15. In this way, when the residue 11 is compressed, the gate valve 18 is opened, and subsequently the plunger 15 is advanced. As a result, the residue 11 in the chamber 16 is intermittently pressure-fed to the residue storage hopper 7 through the pipe 19.

Since the pipe 19 is completely sealed,
Between the piston pump 13 and the residue storage hopper 7, there is no possibility of generating a bad odor or leaking water. Moreover, since the pipe 19 can be freely bent, the residue 1 from the piston pump 13 to the residue storage hopper 7
It is possible to freely set the transportation route of 1.

When a large amount of sewage flows into the sand basin 1 due to heavy rain, etc., and when a large amount of residue 11 exceeding the pumping capacity of the piston pump 13 is thrown into the adjusting tank 12, the pumping capacity is increased. The residue 11 exceeding the amount is returned to the sand basin 1 and is again charged into the adjusting tank 12 from the sand basin 1.

If the crusher 20 is provided following the conveyor 14 and the residue 11 is crushed to a predetermined size, the piston pump 13 can more smoothly feed the residue 11 under pressure. If a water remover 21 is provided on the downstream side of the pipe 19, the residue 1
Since the water content of 1 decreases, the residue 11 in the residue storage hopper 7 can be easily transported.

[0022]

As described above, according to the present invention, the following useful effects are brought about. When the transfer distance of the residue by the second transfer means is long, basically, it is sufficient to increase the length of the pipe, so that the equipment cost is lower than that of the conveyor. Even if a large amount of residue is put into the regulating pond during heavy rain, etc., the amount of residue that exceeds the pumping capacity of the piston pump is returned to the sand basin, so that it can be easily dealt with in an emergency. The number of piston pumps installed can be minimized. By simply changing the curved shape of the pipe, it is possible to freely set the path for transporting the residue by the second transport means. Since the residue is transported from the piston pump to the residue storage hopper in a completely sealed state, there is no possibility of odor generation or water leakage during this period. Unlike a conveyor, a piston pump has few moving parts, so that consumable parts are replaced less frequently, and less residue is deposited, making maintenance and inspection easier. In particular, since there are no moving parts in the pipe, maintenance work on the pipe is almost unnecessary.

[Brief description of drawings]

FIG. 1 is a partial schematic front view showing an embodiment of sewage treatment equipment of the present invention.

FIG. 2 is a schematic sectional view showing a piston pump.

FIG. 3 is a partial schematic plan view showing a conventional 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 sewage treatment facility.

[Explanation of symbols]

1: Settling pond 1A: Inlet 1B: Outlet 1C: Pit 2: Dust remover 3: Screen 4: Motor 5: scraper 6: Screen transfer machine 7: Screen residue storage hopper 8: First transport means 8A: Collective transportation means 8B: Intermediate transfer means 9: Second transport means 10: Sand 11: Screen residue 12: Adjustment tank 13: Piston pump 14: Conveyor 15: Plunger 16: Chamber 17: Hopper 18: Gate valve 19: Piping 20: Crusher 21: Water catcher 22: Pusher

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Fukano 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Minoru Yamamoto 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Pipe Incorporated (56) Reference JP-A-3-101803 (JP, A) JP-A-4-294895 (JP, A) JP-A-4-66105 (JP, A) JP-A-5-171628 (JP, A) A) JP-A-5-170293 (JP, A) JP-A-8-173995 (JP, A) JP-A-8-173825 (JP, A) JP-A-9-10800 (JP, A) (58) Survey Fields (Int.Cl. ⁷ , DB name) B01D 21/18 B67D 5/02 C02F 11/00 B01D 21/24

Claims (3)

(57) [Claims] 1. A plurality of sand basins for slowly flowing sewage to settle and remove sand in the sewage in the course of this flow, and a sewage sluice installed in each of the sand basins. Dust remover for scraping out the residue to the outside of the sand basin, and the residue collected by the dust remover is collected and transferred to the residue storage hopper installed at a higher place than the sand basin to transfer the residue. And a first conveying means for collecting the screen residue scraped out by the dust remover, and the screen residue storage unit for collecting the screen residue collected by the first transfer means. In a sewage treatment facility comprising a second transport means for transporting to a hopper, the second transport means comprises an adjusting tank and a piston pump, and the residue collected by the first transport means is the adjusting tank. After being put into the The Te was pumped until 渣貯 distillate hopper, minutes Works residue exceeding pumping ability by the piston pump, sewage treatment facility, characterized in that return to the settling basin. 2. The sewage treatment facility according to claim 1, further comprising a crusher for crushing the residue into a size that can be pumped by the piston pump. 3. The sewage treatment facility according to claim 2, wherein a water extractor is provided on the residue discharge side of the piston pump.