JPS644477Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a contact oxidation tank, and more specifically, it is used for treating urban sewage, domestic wastewater, wastewater from food factories, etc.
This relates to contact oxidation tanks used for purifying rivers, lakes, and marshes, and for treating raw water for water supply and sewage.

[Conventional technology]

A contact oxidation tank that uses microbial activity to purify water uses multiple partition plates to form a zigzag water passage in the tank, and raw water passes between the fillers filled in the water passage. Conventionally, various structures have been provided, such as those that allow However, with conventional products, when the flow rate of raw water increases significantly, raw water that exceeds the water treatment capacity must be discharged untreated, and the concentration of organic pollutants (hereinafter referred to as BOD) in the raw water increases. When it was high, sufficient water purification treatment could not be performed. Furthermore, the conventional product had the disadvantage that its use had to be discontinued when cleaning or repairing the inside of the tank.

[Problem that the invention attempts to solve]

The present invention solves the above-mentioned conventional drawbacks, and not only improves the contact oxidation efficiency between raw water and biofilm, but also improves the efficiency of oxidation through contact between raw water and biofilm. By installing a water inlet that can be opened and closed on the edge, and installing an inlet on one side of each water channel and an outlet that can be opened and closed on the other side, it is possible to control the flow rate and BOD concentration of raw water. To provide a catalytic oxidation tank which can be adapted to the above conditions and which allows cleaning and repair of the inside of the tank while continuing catalytic oxidation.

[Means for solving problems]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic plan view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a partially enlarged perspective view.

As shown in FIGS. 1 and 2, the contact oxidation tank of the present invention has a plurality of partition plates 21, 22, 23, 24.
A plurality of water passages 31, 32, 33,
34 and 35 are formed. In Figure 1,
5 by four partition plates 21, 22, 23, 24
Although one in which three water passages 31, 32, 33, 34, and 35 are formed is illustrated, the present invention is not limited to this. Each of these water passages 31, 32, 33, 34,
35 is filled with filler 2, so that raw water passes through between the fillers 2 and migrates. Water ports 41, 42, 43, 4 that can be opened and closed at least on one end edge of each of the partition plates 21, 22, 23, 24
4 is provided. Water outlet 41, 42, 43, 44
can be opened and closed by attaching and detaching the closing plate 3, as shown in FIG.
Partition plates 21 and 2 with 43 and 44 provided on one end edge
2, 23, 24 are arranged alternately, and when the water passages 41, 42, 43, 44 are closed, raw water flows through each water passage 31, 32, 33, 3.
4, 35, and when the water passages 41, 42, 43, 44 are opened, the raw water passes between the filling materials 2 and flows into the water passages 31, 3.
2, 33, 34, and 35 in a zigzag pattern. Each of these water passages 31, 3
Inlets 51, 52, 53, 54, 55 which can be opened and closed are installed on one side of each of the inlets 2, 33, 34, 35.
Openable and closable inlets 51, 52, 53, 54, 55
As for valves 61, 62, 63, 64, 65
An example of an inflow pipe with a valve is shown, and raw water is transferred to each water passage 31, 32, 33, 34, 3 by opening and closing the valve.
5, or stop the inflow. Further, on the other side of each of these water passages 31, 32, 33, 34, 35, openable and closable outflow ports 71, 72, 73, 74, 75 are installed. Outlet ports 71, 72, 7 that can be opened and closed
3, 74, 75 are valves 81, 82, 8
A discharge pipe provided with valves 3, 84, and 85 is shown as an example, and by opening and closing the valves, treated water and sludge can be discharged or their discharge can be stopped.

Note that the reference numeral 4 in the figure indicates a pedestal, and the filler 2 is placed on the pedestal 4. Further, reference numeral 5 indicates a sludge drainage path provided on the outlet side of the tank 1, and if the sludge drainage path 5 is provided in this way, sludge will easily stay there and it can be easily discharged, which is preferable. .

[Effect of invention]

The contact oxidation tank of the present invention as described above is made of synthetic resin such as fiber-reinforced polyester resin or vinyl chloride, and can be used to process urban sewage, domestic wastewater, wastewater from food factories, raw water for water supply, etc. using the contact oxidation method. It is used to purify water using the method described in this article. To purify raw water, proceed as follows. First, if the raw water flow rate and BOD concentration are normal, for example, open valves 61 and 83, and close all other valves 62 to 65, 81, 82, 84.
and 85 is closed. On the other hand, water ports 41 and 42
The closing plate 3 is removed from the drain plate 3 to open the water passage, and the other water passages 43 and 44 are closed by the closing plate 3. Next, the raw water flows into the water passage 31 from the inlet 51. Then, the raw water flows through the water passage 31, the water passage 41, the water passage 32, the water passage 42, and the water passage 33.
It flows in a zigzag pattern along the space between the filling materials 2. In addition, when treating raw water with a high concentration of BOD, open the valves 61 and 85, close the other valves 62 to 65 and 81 to 84, and open all the water ports 41 to 44 to allow the raw water to flow. It flows into the water passage 31 from the inlet 51 . Then, the raw water is
Between the filling materials 2 of 4 and 35 and each water inlet 41 and 4
2, 43, and 44, and flows in a zigzag pattern along each water passage. In this case, the contact oxidation time between the raw water and the microorganisms becomes longer. Furthermore, when the flow rate of raw water to be treated is extremely large, all valves are opened, all water inlets are closed, and the raw water is transferred to each water channel 3.
1, 32, 33, 34 and 35. Then, the raw water is distributed to each water passage and flows between the fillers 2 therein. The treated water will be discharged from each open outlet. As described above, when the raw water passes between the fillers 2 and flows linearly or in a zigzag manner along the water passage, oxidation through contact between the raw water and the microbial membrane is well performed. For example, when cleaning the water passage 33, the valve 63 is closed to stop the flow of raw water from the inlet 53, and at least the water passages 42 and 43 are closed. On the other hand, after the raw water in the water passage 33 flows out, the valve 8 at the outlet 73
3 is closed and the inside of the water passage 33 is cleaned. Through this cleaning, the sludge accumulated in the sludge channel 5 is discharged from the sludge channel 5 to the outside. During this time, raw water does not flow into the water passage 33, and other water passages 31, 32, 34, 3
Raw water flows into 5 and is treated. Also, when cleaning other water passages, the same procedure as above may be used.

[Effect of idea]

As described above, according to the catalytic oxidation tank of the present invention, catalytic oxidation of raw water is performed satisfactorily. In addition, this invention
Each partition plate forming a plurality of water passages in the tank is provided with a water passage port that can be opened and closed on at least one end edge, and each water passage has an inlet on one side and an outlet on the other side. It is installed so that it can be opened and closed so that the raw water can be distributed to all the waterways, flow into some of the waterways, or flow in a zigzag pattern along all the waterways. It can also be used as appropriate depending on the flow rate and BOD concentration of raw water. In addition, since the structure is configured so that the inflow of raw water can be stopped and the treated water and sludge can be discharged for each water channel, cleaning and repairs can be carried out while raw water flows into other tanks and catalytic oxidation continues. It is something that can be done.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a schematic plan view, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a partially enlarged perspective view. In the figure, 1 is a tank, 2 is a filler, 21, 22, 23,
24 is a partition plate, 31, 32, 33, 34, 35 are water passages, 51, 52, 53, 54, 55 are inlets, and 71, 72, 73, 74, 75 are outlets.

Claims (1)

[Scope of utility model registration request] In a contact oxidation tank in which a plurality of passageways are formed in the tank by a plurality of partition plates, and the passageways are filled with a filler, a water passageway that can be opened and closed at at least one end edge of each of the partition plates. A contact oxidation tank characterized in that an inlet that can be opened and closed is installed on one side of each of the water passages, and an outlet that can be opened and closed on the other side of each of the water passages.