JPS5837492Y2 - Sewage treatment equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a sewage treatment device that uses a flow rate adjustment basin to send a constant amount of water per unit time from a flow rate adjustment tank to a sewage treatment tank.

Conventionally, this type of device supplies raw water 4 to a flow rate adjustment basin 5 using a pump 2 installed in a flow rate adjustment tank 1, as shown in FIG. A device has been devised that controls the flow rate adjustment water 9 to be returned to the sewage treatment tank 10 and the excess water of the raw water 4 to be returned to the flow rate adjustment tank 1 as return water 8.

However, as in the structure shown in FIG. 1, the raw water 4 passes below the borehole 6 in the flow rate adjustment basin 5 and flows over the metering basin 7, but the gap between the borehole and the meter #47 Because the water flow is slowed down by the submerged weir, dead areas are likely to occur.
Accumulations 11 accumulate at the bottom of the dead zone.

Therefore, when the accumulation 11 occurs, the water flow in the flow rate adjustment chamber 5 changes, and a specified amount of flow rate adjustment water 9 cannot be obtained.
Furthermore, in extreme cases, the lower gap of the sink weir 6 is blocked by the accumulated material 11, and there are many drawbacks in that the flow rate adjustment water cannot be obtained at all.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a sewage treatment device that prevents the accumulation of matter 11 in the flow rate adjustment basin 5 and the deterioration of the flow rate adjustment function. This is what I did.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

5 is a substantially rectangular box, and has an upper inlet on one side for introducing raw water 4 by the pump 2 in the flow rate adjustment tank 1, and an outlet for flowing out to the sewage treatment tank 10 on the other side. A triangular weir having an appropriate height with an inverted triangular notch on the upper side is used as a partition between the inlet and the outlet, and a weighing basin 7 is formed between the side wall on the inlet side and the triangular weir. A sink weir 6 is provided at an intermediate point by suspending a plate-shaped body from above into the wastewater near the bottom and forming a bottom flow port. This is a flow rate adjustment basin formed by arranging a plurality of injection nozzles 17 connected to an aeration pipe 12 or an injection pump 16.

That is, when the pump 2 installed in the flow rate adjustment tank 1 is operated for a certain period of time, the raw water 4 is introduced from the flow rate adjustment tank 1 into the metering basin 7 installed inside the flow rate adjustment basin 5, and the raw water 4 is introduced into the measuring basin 7 provided inside the flow rate adjustment basin 5, and the raw water 4 is introduced into the measuring basin 7 provided inside the flow rate adjustment basin 5. The water is rectified and passes through the bottom flow opening, and the water level rises to the top of the triangular weir and drains into the sewage treatment tank 10.
In this case, how much raw water 4 flows from the inlet to the flow rate adjustment basin 5?
Even if water is supplied, it is regulated by the return port 19 provided at the bottom of the weighing box 7, and the raw water 4 is always maintained between the lower end and the upper end of the inverted triangular notch of the triangular weir 18 without overflowing from the weighing box 7 for a certain period of time. so that a certain amount of raw water 4 flows out into the
The outflow amount is set in advance based on the inflow amount of raw water 4 from the inlet, the inner diameter of the return port 19 for surplus raw water 4, and the height of the inverted triangular notch of the triangular weir.

Therefore, while the raw water 4 is flowing through the weighing box 7, the blower 1 is inserted into the diffuser pipe 12 installed at the bottom of the weighing box 7 once or twice a day.
3 to diffuse the discharge air 14, or inject nozzle 1
7, the injection pump 16 is operated to inject the injection water 15 to agitate the dead water area in the measuring well 7, and the accumulated material 11 accumulated at the bottom is mixed into the flowing raw water 4, and the sewage treatment tank 1
Flow to 0.

Note that the blower 13 or the injection pump 16 should not be operated constantly;
Intermittent operation about once or twice a day is recommended for discharge air 14
Or, the water surface 3 in the measuring well 7 is disturbed by the action of the jet water 15, and the flow rate adjustment function of the measuring well 7 becomes unstable, resulting in an insufficient or excessive supply of raw water 4 to the adjacent sewage treatment tank 10, and the processing capacity is reduced. In order to prevent deterioration, the operation was kept to a minimum.

Therefore, in this invention, by installing an aeration pipe or an injection nozzle in the metering chamber of the flow rate adjustment chamber and stirring the flowing raw water, the accumulated material, that is, the fine sludge, accumulated at the bottom of the metering chamber is treated as sewage. Since the water flows out into the tank, the function of the flow rate adjustment basin is always stable, and a constant amount of raw water can be supplied to the sewage treatment tank, and the performance of the sewage treatment tank is always stable, improving water quality.

Furthermore, since the accumulated material is automatically removed, maintenance and management are facilitated, and the effects of the above-mentioned configuration are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing a conventional embodiment. 2 and 3 are schematic sectional views showing an embodiment of the present invention. Explanation of symbols 1...Flow rate adjustment basin, 2...
・Pump, 3...Water surface, 4...Raw water,
5...Flow rate adjustment basin, 6...Draw weir,
7...Measuring box, 8...Return water, 9...
...Flow rate adjustment water, 10... Sewage treatment tank, 1
1...Accumulation, 12...Diffuser pipe, 13
...Blower, 14...Discharge air, 15
...Injection water, 16...Injection pump, 1
7... Injection nozzle, 18... Triangular weir,
19...Return port.

Claims (1)

[Scope of utility model registration request] In sewage treatment equipment that controls the amount of water to be treated using a flow rate regulating basin equipped with a measuring weir such as a slip weir or a triangular weir, an aeration device or water injection is used around the lower part of the measuring basin installed in the flow regulating basin. A sewage treatment device characterized by being equipped with a device.