JP3481860B2 - Sewage treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a sewage treatment facility,
In particular, a first transfer means for collecting and transferring the scraps scraped out by a dust remover installed in each sand basin, and
Maintenance and inspection work of the second transfer means for transferring the residue transferred by the first transfer means to the residue storage hopper on the ground can be easily performed, and moreover, it occurs when the residue is transferred by the second transfer means. The present invention relates to a sewage treatment facility that can prevent deterioration of the work environment due to odors, water leakage, etc., and that can freely set a transfer path for residue by the second transfer means.

[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 parallel in a plurality of rows (five rows in this example) 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 a scraper for scraping the residue 11 in the sewage out of the sand basin 1 which is endlessly circulated by the motor 4. Have 5.

Reference numeral 6 is a residue transfer machine for collecting the residues 11 scraped out by the dust remover 2 and transferring them to the residue storage hopper 7 installed on the ground. The residue carrier 6
First conveying means 8 for collecting the residue 11 scraped out by each dust remover 2, and second for conveying the residue collected by the first conveyor 8 to the residue storage hopper 7 on the ground. It comprises a transport means 9. 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 transporting means 9 comprises a conveyor such as a chain conveyor, a belt conveyor, a flight conveyor or a skip hoist (when transporting the residue almost vertically).

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 of the dust removers 2 is conveyed by the first conveying means 8 and the second conveying means 8 consisting of a conveyor.
It is conveyed to the residue storage hopper 7 by the conveying means 9. The residue in the residue storage hopper 7 is, for example,
It is transported to an incinerator and incinerated.

[0008]

However, the above-mentioned conventional sewage treatment facility has the following problems. Since the first conveying means 8 including the collective conveying means 8A and the intermediate conveying means 8B is composed of a conveyor, it is necessary to frequently clean the adhering residue or replace consumable parts. That is, it was necessary to frequently perform maintenance and inspection work. 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 transfer means 9, the transfer path of the residue by the second transfer means 9 cannot be complicated, and the second transfer means 9 is used. The transportation route of the residue of shavings was significantly restricted. Even if the first conveying means 8 and the second conveying means 9 are provided with covers and the like, it is impossible to completely prevent odors and water leakage, which deteriorates the working environment.

Therefore, an object of the present invention is to provide a first transfer means for collecting and transferring the scraps scraped out by a dust remover installed in each sand basin, and a transfer means carried by the first transfer means. Maintenance and inspection work of the second transfer means for transferring the residue to the residue storage hopper installed at a higher place than the sand basin can be easily performed, and the odor generated when the residue is transferred by the second transfer means Another object of the present invention is to provide a sewage treatment facility which can prevent deterioration of the work environment due to water leakage or the like, and further can freely set a transfer path for residue by the second transfer means.

[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 outside
A dust remover for scraping out, and a collection of scraps scraped out by the dust remover, and a screening residue transporter for carrying to a screening residue storage hopper installed at a higher place than the sand basin, and The residue carrier is a first carrier for collecting the residue scraped by the dust remover and a second for transferring the residue collected by the first carrier to the residue storage hopper. In the sewage treatment facility including a transfer means, the first transfer means is configured by a running water trough, the second transfer means is configured by an adjusting tank and a piston pump, and the residue collected by the first transfer means is ,
After being put into the adjusting tank, the piston pump is pressure-fed to the residue storage hopper, and the residue that exceeds the pressure-feeding capacity 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 the sewage in the course of this flow. A plurality of sand basins 1 installed in the sand basin 1; It is provided with a residue transfer machine 6 for collecting the discharged residue 11 and transferring it to the residue storage hopper 7 installed on the ground. The 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 FIGS. 1 and 2, the first transfer means 8 is constructed by a running water trough. And, adjusting tank 12 and the second conveying means 9
And a piston pump 13.

The running water trough is a method of causing water to flow in an inclined groove and transporting residue by this flow of water. Since running water is used, odor is generated and residue is attached as compared with a conveyor. There are few advantages, and since there are no moving parts, maintenance and inspection work can be performed easily.

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 put into a hopper 17 of the piston pump 13 described later by the conveyor 14. In the case of heavy rain or the like, when an amount of the residue that exceeds the transfer capacity of the residue by the piston pump 13 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 put into the adjusting tank 12 of the second transfer means 9 by the first transfer means 8 which is a running water trough. Since water always flows in the running water trough, the occurrence of offensive odors and the attachment of residue are extremely small. The residue 11 put in the adjusting tank 12 is transferred to the piston pump 1 by the conveyor 14.
It is thrown into the hopper 17 of No. 3. 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. Thereby, the chamber 16
The residue 11 inside passes through the pipe 19 and the residue storage hopper 7
Is intermittently pumped.

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 during heavy rain or the like and 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.

[0023]

As described above, according to the present invention, the following useful effects are brought about. By constructing the first transfer means by a running water trough which has no moving parts and is less likely to deposit residue, maintenance and inspection work of the first transfer means can be facilitated, and
The generation of offensive odor during transportation of the residue by the transportation means is small. When the transport distance of the residue transfer 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 remained in the adjustment 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

(72) Inventor Hiroshi Fukano 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Tube Co., Ltd. (72) Minoru Yamamoto 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Tube Co., Ltd. (56) References JP-A-3-101803 (JP, A) JP-A-4-294895 (JP, A) JP-A-4-66105 (JP, A) JP-A-5-171628 (JP, A) Kaihei 5-170293 (JP, A) JP 8-173995 (JP, A) JP 8-173825 (JP, A) JP 9-10800 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) B01D 21/18 B21D 21/24 C02F 11/00

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 transfer means for collecting the screen residue scraped out by the dust remover, and the screen residue storage hopper for collecting the screen residue collected by the first transfer means. In the sewage treatment facility comprising a second transport means for transporting the first transport means to the second transport means,
The transport means is composed of an adjusting tank and a piston pump,
The residue collected by the first conveying means is introduced into the adjusting tank and then pressure-fed to the residue storage hopper by the piston pump, and the residue that exceeds the pressure-feeding capacity of the piston pump is A sewage treatment facility characterized by being returned to a sand 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.