JPS6218320Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sewage purification device that aims to efficiently treat sewage that has flowed into a treatment water tank using microorganisms.

Conventional devices using honeycomb cores have been known to treat factory wastewater or artificially stored sewage with microorganisms, but the known device uses the honeycomb cores simply as a microbial bed and allows wastewater to flow through each cell of the honeycomb cores. , or a method of continuously blowing air to make bubbles and sewage flow are known, but the latter method in particular is mostly at an experimental stage, and is not suitable for treating large amounts of sewage such as urban sewage. It is said that there is still no definitive good solution.

However, in this idea, by filling the honeycomb core into the water tank and installing an intermittent air pump vertically inside the honeycomb core, a steady flow is created in the cells of the honeycomb core along with the intermittent supply of air. By preventing clogging in the cells of the honeycomb core, improving efficiency, and reducing running costs, we have provided an extremely effective device for the continuous treatment of large amounts of wastewater.

That is, this invention will be explained with reference to the embodiments shown in FIGS. 1 and 2. A partition wall 2 is provided in the center of the aquarium 1 to constitute aquariums 1a and 1b, and each aquarium 1a and 1b
Honeycomb cores 3 and 3a are respectively filled inside. In this case, the amount of honeycomb cores 3, 3a varies depending on smooth flow of wastewater and residence time in each tank, but the volume ranges from 1/2 to 3/5.
The preferred position is Although the submersion depth varies depending on the pumping pressure, it is generally about 20 cm to 100 cm below the water surface of the upper surface of the honeycomb core.

Water pumping tubes 4, 4a are vertically installed through the central portions of the honeycomb cores 3, 3a, respectively, and air chambers 5, 5a are provided at the lower ends of the water pumping tubes 4, 4a, respectively. The air supply pipes 6 and 6a are connected to each other, and the air supply pipes 6 and 6a are connected to an air supply main pipe 7. The air supply main 7 is connected to a discharge pipe of a compressor (not shown). In the figure, 8 is a water supply pipe, 9 is a drain pipe, 1
1 is a water passage groove provided on the partition wall.

In the above embodiment, if wastewater to be treated is supplied from the water supply pipe 8 as shown by the arrow 12, and pressurized air is supplied from the air supply main pipe 7 as shown by the arrow 13, the pressurized air flows through the air supply pipe. 6, 6a, and is supplied into the air chambers 5, 5a as indicated by the arrow 14 in FIG.
Therefore, the air accumulates in the upper space of the air chamber 5 and gradually pushes out the water, causing the water level to fall. However, when the water level in the air chamber falls to the chain line 15, the air accumulated in the inner and outer chambers 16 and 17 of the air chamber becomes As shown by the arrows 18 and 19, the inside of the pumping cylinder 4 becomes a group as shown by the chain line 20,
And it slides into the water pumping cylinder and rises. As the air mass rises, the water below the air chamber and the water outside the air chamber flow directly or through the suction pipe 2, as shown by arrows 21 and 22.
3, 23a, and is emitted and diffused along with air from the upper ends of the water pumps 4, 4a as shown by the arrow 24. When all the air in the air chamber is exhausted, the inside and outside of the air chamber are filled with water, so the pressurized air supplied by the air supply pipes 6, 6a begins to accumulate in the air chamber again. Even in this case, water is sucked in through the suction pipe 23 and rises inside the water pump, so that
The water in the pumping cylinder changes its flow rate and constantly flows.

In other words, when air is discharged into the pumping tube and the air starts to rise in a bullet shape (dashed line in Figure 5) at the bottom of the pumping tube, the upward flow velocity inside the pumping tube increases rapidly, and the air When the group is released from the end of the pumping tube,
The flow rate is reduced. For example, as shown in Figure 6, when the air release interval is t seconds, the flow velocity changes in a continuous curve as shown by the solid line in the figure, but when the air release interval becomes _t0 seconds or more, , a mountain-shaped curve is drawn for each air mass, and it becomes discontinuous.

If the flow becomes discontinuous in this way, it can be said to be intermittent pumping, but in the case of a continuous curve as described above, the pumping will reach the maximum flow velocity intermittently.

In any case, the release of air is intermittent, and the pumping condition is different from that of small bubble pumping using conventional aeration pipes.

In order to obtain energy economy and continuously variable speed water flow, it is necessary to keep the rising water in the pumping cylinder at intervals (6th
It is better to release the air at t seconds in the figure).

Therefore, the waste water in the water tanks 1a, 1b is circulated through the honeycomb and is effectively purified by the microorganisms attached to the inner walls of the cells of the honeycomb. The pressurized air in the above not only provides water flow energy but also supplies oxygen and promotes the growth of aerobic bacteria.

In the figure, 25 and 25a are drain ports, and 26 is a drain pipe.

In the above embodiment, each water tank is provided with one water pump, but it is also possible to install two or three water pumps as shown by the chain line 27 in FIG. In addition, the wastewater flows into the water tank 1a as shown by arrow 12 in FIG. Continuous processing is possible. Next, in the embodiment shown in FIGS. 3 and 4, water tanks 1a, 1b, 1c are
In addition to installing three tanks, there are partition walls 31, 31 into each tank.
Overflow tanks 32, 32 via a, 31b
a and 32b are provided, and the overflow tank 32 and the water tank 1b and the overflow tank 32a and the water tank 1c are communicated through communication holes 33 and 33a, respectively. In addition to the above, water pumps 4, 4a, 4b, air chambers 5, 5
a, 5b, honeycomb core 3, 3a, 3b, suction pipe 23, 23a, 23b, drain port 25, 25
A, 25b, etc. are installed one more set than in the embodiment shown in FIG. Therefore, the treatment is performed continuously at three locations, and the residence time in the water tank 1 can be increased.

The embodiment shown in FIG. 3 is based on the overflow tank 3.
2, 32a, and 32b are provided, the supernatant water in each tank is transferred to the next tank, and the purification efficiency can be improved. In other words, according to this invention, a honeycomb core is filled into the water tank so that water can flow up and down, a water pump is installed vertically inside the honeycomb core, a water supply pipe is installed on one side, and a drain pipe is installed on the other side. This has the effect of allowing continuous and efficient microbial treatment of wastewater flowing into the aquarium. Furthermore, as the air rises intermittently inside the pumping cylinder, the water speed fluctuates, and therefore the flow speed flowing down inside the honeycomb core also fluctuates, preventing steady flow inside the cells and making all the cells more effective. It can be made to flow. Also, 34, 34a in Figure 2
By providing horizontal holes in the honeycomb core as shown in the figure, it is possible to use the cells of the honeycomb core uniformly.

In addition, since the air chamber was constructed by loosely fitting the inner and outer cylinders into the lower end of the water-lifting cylinder, the water acts as an on-off valve using the siphon principle. Therefore, despite its simple structure, it has the advantage of being reliable in its ability to send out air intermittently, without the risk of failure, and in that the intermittent interval can be controlled by the amount of air being sent, so it can be repaired for a long period of time. It is extremely suitable as a driving source for wastewater treatment, which requires continuous operation.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted plan view of an embodiment of this invention, Fig. 2 is a sectional view, Fig. 3 is a partially omitted plan view of another embodiment, and Fig. 4 is a sectional view. 5 is an enlarged cross-sectional view of the air chamber, and FIG. 6 is a graph showing changes in water velocity in the water pumping cylinder. 1... Water tank, 3, 3a, 3b... Honeycomb core, 4, 4a, 4b... Water pump, 5, 5a, 5b
... Air chamber, 6, 6a ... Air supply pipe, 7 ... Air supply main pipe, 8 ... Water supply pipe, 9 ... Drain pipe, 11 ... Water channel.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A honeycomb core is filled into a water tank so that water can pass vertically, a water pump is installed vertically inside the honeycomb core, and a bottomed inner chamber is provided to the outside of the bottom of the water tank. The crested outer chamber is loosely fitted one after another at a predetermined interval, and the inner chamber and the outer chamber are communicated with each other at the upper part of the inner chamber, and an air supply pipe is connected to one side of the outer chamber. A sewage purification device comprising an air chamber in which air is sent out intermittently, an air supply pipe connected to the outer chamber, a water supply pipe installed on one side of the water tank, and a drain pipe installed on the other side. 2. The sewage purification device according to claim 1, wherein the honeycomb core is filled in the middle part of the water tank so as to be below the water surface, and is buried in the treated water. 3. The sewage purification device according to claim 1, wherein a plurality of water tanks are arranged in series, and the water supply pipe and drain pipe of each tank are arranged diagonally in series. 4. The sewage purification device according to claim 1, wherein one or more water pumps are installed in the same water tank.