JPS603851B2 - Sewage water supply operation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of operating sewage water in which sewage water is continuously transported at a small-scale pumping station in a sewage pipe.

Traditionally, domestic wastewater discharged from general households, etc. is collected into small or medium-diameter sewage pipes, passed through a small-scale pump station, collected into the main sewage pipe, and then sent to the sewage treatment plant via a relay pump station. and is performing predetermined processing.

However, due to the long distance to the sewage treatment plant, sufficient natural water supply may not be possible due to topography and other factors, simply due to the difference in elevation caused by the depth at which the sewage pipes are buried. For this reason, small-scale pumping stations and larger relay points are installed here and there in the sewers, and the height of the sewers is artificially set regardless of the topography so that the sewage flows naturally to the pumping station. The water is pumped up and discharged to a sewage position higher than the sewage position. However, since garbage is also discharged into the wastewater, the pump may become clogged with the discharged garbage and become inoperable.
To prevent this, screens are installed at small pumping stations to remove trash from inflowing sewage. This screen has the disadvantage that the equipment cost is high because it requires a means to scrape up and discharge the captured garbage and requires manpower. In view of this, the present invention is designed to enable continuous delivery of waste water without requiring manpower or a dust remover.

The present invention will be explained below based on illustrated embodiments. Domestic wastewater is collected for a certain number of households and sent to a small-scale pumping station via a small or medium-diameter sewage pipe 1.

At this time, the sewage pipe (or sewage channel) 1 is branched into two forks at the pump station, and strainers 4a, 4b are provided in each water channel 3a, 3b via valves V1, V2, respectively. This strainer had a drum screen rotatably housed within the casing. - Use tally drum screen type and others. Each strainer 4a, 4b is provided with two outlets, and the wastewater filtered by the strainer is passed through valves Va, Vb to drain pipes 5a, 5b at one outlet, and to the other outlet. Pumps Pa and Pb are installed so as to be introduced into a water tank of a pumping station. The drain pipes 5a and 5b are connected to the same sewer channel 6. In the above-mentioned pumping station, one of the strainers, for example 4a, is used for the wastewater flowing in from the small or medium diameter sewer pipe.
At this time, if the valve V is opened and the valves V2 and Va are closed, the inflow wastewater is stored in the water storage tank 2 by the operation of the strainer 4a (normal rotation), and the internal capacity of the tank is It is assumed that it has been set.

When the strainer becomes clogged with debris in the inflowing sewage, the inflowing sewage is switched to flow into the other strainer 4b. That is, the inflow circuit can be easily switched by closing valve V and opening V2. Then, by opening the valve Va (with Vb closed) and driving the pump P, excess water stored in the water tank is pumped into the strainer 4a, and the strainer is rotated in the opposite direction. The screen dregs are discharged and removed through the valve Va and the drain pipe 5a by pumping the excess water stored in the furnace.When the water in the water tank runs out or drops to a certain level, the pump Pa is stopped, the valve Va is closed, and the water is removed. Subsequently, the inflowing wastewater is passed through the strainer 4b from the opened valve V2, passed through the furnace, and is caused to flow into the water storage tank. When this strainer 4b becomes clogged, the valves V, , Vb are opened in the opposite direction, V2 is closed and the pump Pb is driven, thereby diverting the inflowing sewage to the strainer 4a and screen scum clogging the strainer 4b. is forced to be discharged to the downstream side, and in this way, the strainer is alternately switched to filter the wastewater that continuously flows into the furnace. Even if the strainer is not clogged, when the water level in the water tank reaches the set water level, the above operation can be performed to clean and remove the strainer and drain the stored water, and this can also be done at regular intervals. It is possible.

In Fig. 2, L, , L2 are for interlocking with high and low level meters.

Of course, the amount of inflowing sewage is stable, and when backwashing pressure is sent, valve V
, if the inflowing wastewater can be temporarily retained or stopped in the pipe while the pipes are kept closed, the set of strainers may be operated intermittently. Therefore, according to the present invention, a closed strainer is used, and incoming sewage is always filtered through the furnace, passed through a pump as furnace water, and is stored in a water storage tank in a pumping station at a relay station, and the strainer is clogged with debris. By pumping the collected water downstream, it is pumped and discharged along with the garbage that has caused the clogging, which requires means and effort to remove the garbage from the middle of the sewer, especially at a small-scale pumping station. It has the advantage that it can reliably pump up and flow water without any trouble, and the device is simple.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a wastewater drainage channel, and FIG. 2 is an explanatory diagram of a strainer. 1. ．． ．． ．． ．．・Sewage pipe, 2...Water tank, 3a, 3b
・・・． ... Waterway, 4a, 4b... Strainer, 5a, 5b... Drain pipe, 6... Sewage channel,
V,,V2,Va,Vb... Valve, Pa,P
b...Pump. Figure 1 Figure 2

Claims (1)

[Claims] 1. At a small-scale pumping station in a sewage pipeline, the sewage is filtered through at least one set of strainers equipped with valves on the inlet and outlet sides of the pumping station and equipped with a lifting pump, and the sewage is sent to the water storage tank of the pumping station. When water is stored and the strainer becomes clogged, the filtered wastewater is pumped to the strainer, and the waste removed by the strainer is forced to the downstream side along with the filtered wastewater, and the strainer is used for temporary storage of waste. A method of operating wastewater that enables continuous delivery of wastewater without clogging the pump, requiring manpower at the pump station, or using a dust remover.