JPS5938836B2 - Multi-stage honeycomb structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in honeycomb structures used in filter beds for sewage treatment.

BACKGROUND OF THE INVENTION Conventionally, a non-nicum structure with a large surface area per volume has been employed as a fixed filter bed in organic wastewater treatment using microorganisms.

Figure 1 shows the honeycomb structure, and its size is approximately 500 to 1000 m in width W, 7 IL, and 10 in length.
00 to 2000 mm, and the height H is about 1000 mm.

The cell 2 is open at both ends, and when used for sewage treatment, fluid is normally passed through the cell 2 in the axial direction, and the fluid is constantly in contact with the inner wall of the cell 2.

The size of honeycombs is limited due to manufacturing reasons, and in actual processing equipment, it is necessary to line up many honeycombs or stack them in many tiers.

At this time, as shown in FIG. 2, the honeycomb structures 1a, 1b, 1
If the cells c... are stacked in the direction of cell 2, the cells will always shift as shown in FIG. 3 and will not fit together exactly like a single honeycomb.

As a result, various sizes of branching and merging occur in the flow passages at the end faces of the openings of the honeycomb structure, and small flow passages are likely to be clogged with impurities and foreign matter contained in the fluid, interfering with smooth flow.

Conventionally, for this purpose, a rough grid was inserted into the joint surface,
In order to match the cells, we used cells that had been matched and joined in advance with adhesive.

However, when fluid passes through the cell in sewage treatment,
Because the flow rate is slow, the flow is laminar; in this case, there are parts that flow in contact with the cell walls and parts that flow between the cells, and a considerable portion of the fluid passes through without contacting the cell walls.

Therefore, it is necessary to use power to circulate the fluid many times to effect contact.

However, even if you do not do this, it is better to make the height of the honeycomb as low as possible, stack it in multiple stages, and actively branch and merge at the opening surface of the honeycomb.The contact efficiency will be much better, and therefore the sewage purification will be improved. It is clear from both theory and experience that efficiency improves.

The reason for trying to use the cell by penetrating it even at the cost of this was simply to prevent the cell from clogging.

Also, even if you try to actively apply branching and merging,
If the conventional Hanika Buddha is used with a reduced height, the following drawbacks will occur.

In other words, conventionally, when filling a tank with Nicum with a height close to I'm, a coarse grid 3 as shown in Fig. 4 is sufficient in terms of strength, but if this is lowered to about 50 to 1001 nrIL and laminated. , a large deflection occurs between the lattices as shown in FIG.

Using a small grid to prevent this will block the honeycomb's valuable flow paths.

Furthermore, since honeycombs of such low height are extremely difficult to handle, filling a tank with a large number of honeycombs is not very modern.

As described above, this method has been completely ignored even though it is theoretically accepted due to concerns about cell clogging, physical strength, and workability.

The present invention solves all of these problems.

That is, an adhesive is applied to the end faces of the openings of the honeycombs whose height has been reduced, and they are adhered to each other and joined in multiple stages as shown in FIG. 61.

When the joint is viewed from the top of the cell, only the contact point a on the opening surface is bonded, as shown in Figure 6-2, but as shown in Figure 6-3, a fillet of adhesive is formed between each other to ensure a strong bond. It is done.

As for the parts other than the contact points, the cut surfaces of the openings are reinforced with adhesive as shown in Figure 6, 4, resulting in an extremely strong nicomb as a whole, and bending occurs between the grids as shown in Figure 5. On the contrary, it becomes stronger than a single honeycomb with cells passing through it.

However, large blocks have many protruding ears as shown in Figure 6, 2, making them difficult to handle and causing damage.

Therefore, in order to prevent this, by gluing a thin plate-like material C to the entire outer periphery of the laminated honeycomb as shown in Fig. 7,
It becomes extremely easy to handle.

A state in which a thin plate-like material is adhered to the side surface of a honeycomb is shown in FIG. 72, where d is an adhesive.

This sheet material can be made as thin as the honeycomb material, or it can be made thick enough to withstand external impacts.

In this case, by attaching a bottom plate with some space at the bottom, it can be used as a tank as is.

By branching and merging the fluid passing through the cell in this way, the same effect can be achieved even if the number of times the fluid circulates is very small. Furthermore, speaking of cell clogging,
Since the number of holes has increased tens of times compared to the number of openings in the past, impurities and foreign substances that were concentrated in a few places are now widely dispersed, and there is no longer any need to worry about clogging. .

In this way, the present invention actively performs the branching and merging of fluids, and has a multi-stage filter that has sufficient strength as a filter medium for wastewater treatment.
・It is extremely useful for providing nicum structures.

[Brief explanation of the drawing]

Fig. 1 shows a conventional nicum-like structure composed of hexagonal columnar cells, Fig. 1 is a schematic perspective view showing its external shape, and Fig. 1 2 is a section A in Fig. 1. Fig. 2 shows a state in which the same-shaped nicum-like structures are stacked and arranged in the axial direction of the cell, and Fig. 3 shows the cell openings of the stacked nicum-like structures. Fig. 4 is a vertical cross-sectional view of the conventional honeycomb on the lattice when it is filled in a tank, and Fig. 5 is a plan view showing the deviation of the honeycomb.
FIG. 6 is a vertical cross-sectional view showing the state of deflection when Nicum is laminated on a grid; FIG. 6 shows an embodiment of the present invention; 1 is a vertical cross-sectional view thereof, and 2 is a plan view showing the bonding state of the contact portions of the cells. ,3
4 is a vertical cross-sectional view showing the bonded state of the contact portion, 4 is a vertical cross-sectional view showing that the non-bonded portion is reinforced with adhesive, and FIG. 7 shows an embodiment of the present invention. 2 is a schematic perspective view showing the external shape with a cutout so that you can see the
Detailed plan view with the section enlarged.

Claims (1)

[Claims] 1. Reduced height...Multi-tiered structure characterized by applying adhesive to the end face of the opening of the Nicum structure, gluing them in multiple stages, and adhering a thin plate-like material to the entire outer periphery other than the opening. honeycomb structure.