JPS5839833Y2 - water treatment equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water treatment device equipped with an open-top chlorine contact tank for water treatment for purposes such as sterilization.

In this type of equipment, in order to take out the treated water from the contact tank, a weir is provided on the downstream side of the contact tank and the water to be treated overflows against the weir. As a result, a large amount of foam is generated, which is blown away by the wind and gives off an odor.

In view of the above points, the present invention has a simple configuration improvement,
The purpose is to suppress the generation of bubbles that accompanies the removal of treated water from the chlorine contact tank, and to prevent foam scattering and odor generation.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

In water treatment equipment that purifies treated water such as urban sewage and industrial wastewater, activated sludge is used to remove organic content and nitrogen caused by ammonia from the treated water, and after separating activated sludge and suspended solids. The water to be treated is supplied to an open-top chlorine contact tank 2 via a supply pipe 1, and the water to be treated is sterilized, decolorized, and deodorized.

A defoaming tank 4 equipped with a defoaming water supply device 3 is connected to the supply pipe 1, and is used to extinguish foam generated by activated sludge and supplied together with the water to be treated without foaming. It is constructed so that the water to be treated can be supplied to the chlorine contact tank 2 in a state where the water is foamed by showering the foamy water, and the water is bubble-free as much as possible.

The chlorine contact tank 2 is provided with a chlorine injection device 5 on the upstream side and an overflow side weir 6 on the downstream end, and sterilizes, decolorizes, and deodorizes the water to be treated by contact reaction with chlorine during the flow process. It is constructed so that the water to be treated is caused to overflow the weir 6 and flow out into the discharge pit 7 while the water is being treated.

The downstream side surface F of the overflow side weir 6 is configured to have an upward slope of about 45°, and the water to be treated that overflows the weir 6 flows down along the slope, and the water to be treated flows out. This structure is designed to suppress the accompanying foaming.

It is preferable that the slope of this side face F be as small as possible, such as about 30 degrees, but there are also space problems in terms of equipment arrangement.
Depending on the degree of foam generation due to outflow, it may be set as appropriate depending on the situation, such as approximately 60 degrees.
The flow rate of the water to be treated may be reduced by laying a pipe-shaped cloth or the like, or by forming minute irregularities, to further suppress foaming.

A discharge pipe 8 is provided from the downstream lower part of the contact tank 2 to the discharge pit 7, and a valve 9 is provided at the end thereof, and the valve 9 is opened and closed by a bundle 10 provided at the upper part of the discharge pit 7. Contact tank 2
The structure is such that the mud that settles and accumulates inside can be appropriately discharged.

In the figure, reference numeral 11 denotes an opening/closing lid for performing maintenance and inspection of the valve 9 and the discharge pit 7.

In the above embodiment, the water supply pipe 1 to the contact tank 2 is
A defoaming tank 4 is provided in the tank to prevent the foam generated during water treatment from being supplied to the contact tank 2 without being broken, thereby preventing odor from being generated due to the foam, thereby better preventing odor generation. However, the present invention may not include the defoaming tank 4.

In summary, in the water treatment apparatus according to the present invention, the downstream side surface F of the overflow side weir 6 that discharges the water to be treated from the open top type chlorine contact tank 2 for water treatment is configured to be an upwardly inclined surface. Features.

In other words, although it is a simple structural improvement of configuring the downstream side surface F of the overflow side weir 6 to be an upwardly inclined surface,
By causing the water to be treated that overflows from the contact tank 2 to flow out along the upwardly inclined surface, it is possible to avoid an impactful flow down, suppress the generation of foam accompanying the outflow of the water to be treated, and prevent the foam from scattering due to the wind. It has now been possible to prevent odor generation.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the water treatment device according to the present invention,
FIG. 3 is a schematic vertical cross-sectional view showing a chlorine contact tank portion. 1... Supply pipeline, 2... Chlorine contact tank,
3... Defoaming water supply device, 4... Defoaming tank, 6... Overflow side weir, F...
downstream side.

Claims (1)

[Claims for Utility Model Registration] ■ The downstream side face F of the overflow side weir 6 that drains the water to be treated from the top-open type chlorine contact tank 2 for water treatment is configured to be an upwardly inclined surface. water treatment equipment. (2) The utility model registration claim item (2) is characterized in that the treated water supply pipe 1 to the chlorine contact tank 2 is connected to a defoaming tank 4 equipped with a defoaming water supply device 3. The device described.