JPH0433921Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an inclined tube block in an upflow type inclined tube sedimentation device for sedimentation and separation of suspended solids in waste water, for example, in a settling basin.

Conventional Technology In general, solid-liquid separation to separate suspended solids (sludge) in wastewater is essential in wastewater treatment processes, but sedimentation separation is particularly important in water supply and industrial applications. It is used in a wide range of applications, including water supply, sewage treatment, and industrial waste treatment.

In recent years, sedimentation devices using inclined tubes have attracted attention in various fields because they significantly improve the sedimentation efficiency of sedimentation tanks.

Conventionally, as shown in FIG. 8, for example, as an inclined tube block 20 in such an inclined tube sedimentation device, thin corrugated synthetic resin plates 21 having forward and upwardly inclined uneven portions 22 and 23 are arranged in parallel. Adjacent corrugated plates 21, 21 each have inclined uneven portions 2
A system has been developed in which the pipes 2 and 23 are joined together to face each other to form an assembly of inclined pipes oriented in the same direction (see Japanese Utility Model Application Publication No. 133204/1983).

Such an inclined pipe block 20 has, for example, a large number of water passage pipes 24 that are inclined forward and upward, and because it is a so-called honeycomb tube module, in wastewater treatment, wastewater containing suspended solids is finely divided. Conduit 24 of inclined pipe block 20
The water flows into the pipe 24 from below and rises in the pipe 24 from the bottom to the top. On the other hand, the suspended solids sequentially settle in the pipe line 24 from top to bottom. In this case, conduit 24
The settling area inside the tube is very large, so the settling efficiency is good, and the settling surface is almost straight (flat) with no bends, so the suspended solids that settle on the slope of the tube are It slides downward under its own weight and has excellent wastewater treatment capabilities.

Problems to be solved by the invention By the way, such a conventional inclined pipe block 2
0 is, for example, a large number of front upwardly inclined uneven portions 2
After stacking the corrugated substrates 21 having the corrugated substrates 2 and 23 and cutting them into predetermined dimensions, these corrugated substrates 21 are arranged in parallel, and the adjacent corrugated substrates 21,
21 are formed by joining the bottom wall of the inclined recess 22 and the top wall of the inclined protrusion 23, which face each other, in an overlapping state. Laminated corrugated substrate 2
When cutting 1, it is extremely difficult to cut accurately to the dimensions, so a so-called tolerance of 2 to 4.5 mm is usually allowed as an allowable error range. Since the so-called perpendicularity of both ends is not achieved and the end face of the completed inclined pipe block 20 does not have sufficient perpendicularity, when two inclined pipe blocks 20, 20 are arranged in series, there are A gap 25 of about 9 mm was created. Due to the existence of such gaps,
Or the adjacent inclined pipe blocks 20, 20
The water flow pipe 24 at the rear end of the front inclined pipe block 20 is
Level l1 of the opening end (level of the extended end when there is no gap 25 as shown by the dashed line)
However, the level l1 and l2 are often lower than the level l2 at the open end of the corresponding water flow pipe 24 at the front end of the rear inclined pipe block 20. As a result of the difference (-m) occurring in opposite directions, the suspended solids S will gradually accumulate at the connecting portion of both inclined pipe blocks 20, 20, and in severe cases, the water passage pipe 24 of block 20 will be damaged. There was a problem that the inside was blocked and the efficiency of wastewater treatment decreased significantly.

The purpose of this invention is to solve the above-mentioned problems of the prior art.Due to the tolerances when cutting the laminated corrugated substrate during the manufacturing of the inclined tube block, and the difference in the height of the support frame on which the inclined tube block is placed. Therefore, even if there is a gap between the connecting parts of two inclined pipe blocks arranged in series, suspended solids are difficult to settle in the connecting parts, and the inside of the pipe of the inclined pipe blocks is blocked. There is no such thing as
Suspended solids falling from above along the pipe wall can fall smoothly into the pipe of the next inclined pipe block, and the flow of suspended solids rising from below is not disturbed. It is an object of the present invention to provide an inclined pipe block in an inclined pipe sedimentation device, which can smoothly move into the pipe line of the next inclined pipe block and has extremely high wastewater treatment efficiency.

Means for Solving the Problems In order to achieve the above object, this invention has been developed in such a way that a corrugated substrate having a large number of front upwardly sloping uneven portions at a predetermined pitch and arranged in parallel is It is equipped with a substantially rectangular parallelepiped-shaped inclined pipe block having a large number of forward and upward water passages formed by joining the mutually opposing bottom walls of the inclined recesses and the top walls of the inclined convex parts in an overlapping state. At the connection point between two adjacent inclined pipe blocks arranged in series, the open end of the water passage at the rear end of the front inclined pipe block is the open end of the corresponding water passage at the front end of the rear inclined pipe block. In an inclined pipe sedimentation device that is connected to a section, the level of the open end of the water flow pipe at the rear end of each inclined pipe block is higher than the level of the open end of the corresponding water flow pipe at the front end of the same block. The gist of this paper is a tilted tube block in a tilted tube sedimentation device, which is of high quality.

The material for the above corrugated board is lightweight,
It is preferable to use materials that have excellent corrosion resistance and are inexpensive, such as synthetic resins such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene. Among them, it is preferable to use hard polyvinyl chloride.

In addition, the corrugated substrate can be used, for example, in the vacuum and
It may be manufactured by air pressure molding or flat plate press molding.

Further, the bottom walls of the inclined concave portions and the top walls of the inclined convex portions facing each other of the parallel corrugated substrates are combined,
Alternatively, as the adhesive for bonding the corrugated substrate and the intermediate partition plate, solvent-based adhesives, urethane-based adhesives, rubber-based adhesives, and the like may be used.

Note that if the corrugated substrate is made of polyvinyl chloride, it is desirable to use a solvent-based adhesive. Here, the solvent-based adhesive is composed of tetrahydrofuran (THF) alone, or a mixed solvent consisting of THF mixed with other solvents such as methyl isobutyl ketone, toluene, and cyclohexanone in a predetermined ratio, or A resin component such as polyvinyl chloride or a copolymer of vinyl chloride, vinyl acetate, ethylene or propylene is dissolved in these solvents alone or in a mixture.

Note that the mutually opposing bottom walls of the slanted recesses and the top walls of the slanted protrusions of the corrugated substrate are bonded together not only by the adhesive described above, but also by other methods.
In some cases, this may be done by heat fusion or mechanical bonding.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this specification, front, rear, right and left are based on Figure 1, where the front refers to the right side of Figure 1, the rear refers to the left side of the drawing, the left refers to the front side of the drawing paper, and the right refers to the back side of the same figure. shall mean.

1 to 4 show a first embodiment of this invention.

In the same figure, an inclined tube block 10 in an inclined tube sedimentation device has a substantially rectangular parallelepiped shape, has a large number of front upwardly inclined uneven portions 2 and 3 of a predetermined pitch, and has a corrugated substrate 1 arranged in parallel. , a large number of water flow pipes 4 facing forward and upward, formed by joining the bottom wall 2a of the slanted recess 2 and the top wall 3a of the slanted protrusion 3, which are adjacent to each other and face each other, in an overlapping state.
It has the following. Here, as the corrugated substrate 1, as shown in FIG. 1 and FIG. 2, two types of corrugated substrates 1a and 1b are used in which the arrangement of the inclined uneven portions 2 and 3 is different from each other, and the arrangement is opposite to each other. .

In this invention, the level l1 of the open end of the water flow pipe 4 at the rear end of each inclined pipe block 10 is higher than the level l2 of the open end of the corresponding water flow pipe 4 at the front end of the same block 10. It is said that Here, both levels l1, l
It is preferable that the difference (m) between 2 and 2 is about 10 to 20 mm.

Therefore, as shown in FIG. 3, at the connection between two adjacent inclined pipe blocks 10, 10 arranged in series, the opening end of the water flow pipe 4 at the rear end of the front inclined pipe block 10 is The level l1 is always higher than the level l2 at the open end of the corresponding water passage 4 at the front end of the rear inclined pipe block 10. Therefore, the suspended solids that have fallen from above along the pipe wall are transferred to the next inclined pipe block 10.
can fall smoothly into the conduit 4, and suspended solids are unlikely to settle in the connecting portion. In addition, the suspension rising from below can smoothly move into the pipe line 4 of the next inclined pipe block 10 without its flow being disturbed.
There is no clogging of the inside of the water pipe 4, and the wastewater treatment efficiency is very high.

A pair of side plates 5 and 6 are joined to both left and right sides of the inclined tube block 10.

Corrugated substrates 1a, 1b, and left and right side plates 5, 6
The material used was hard polyvinyl chloride, which is lightweight and has excellent corrosion resistance, and the adhesive used to bond them together was a solvent-based adhesive based on tetrahydrofuran (THF).

The corrugated substrates 1a and 1b are manufactured from the above-mentioned hard polyvinyl chloride by vacuum/pressure forming.

Although not shown, each corrugated substrate 1a, 1
A female fitting part for positioning is provided on one of the bottom wall 2a of the inclined recess 2 and the top wall 3a of the inclined convex part 3 of b, and a male fitting part for positioning is provided on the other. Then, the male and female fitting portions of the bottom wall 2a of the inclined recess 2 and the top wall 3a of the inclined convex portion 3 facing each other are fitted together to position the adjacent corrugated substrates 1a and 1b. You can also do it.

The size of the inclined pipe block 10 is determined by the installation conditions and the size of the equipment in the inclined pipe sedimentation device such as a sedimentation tank. For example, the inclined pipe block 10 has a width of 430 mm and a length of 2000 mm. It has a size of approximately 600 mm in height.

In addition, the inclined uneven portions 2 of each corrugated substrate 1a, 1b,
3, that is, the pitch of the water passage pipes 4, is determined by the conditions of the sedimentation separation operation in the wastewater treatment process, that is, the concentration of suspended solids in the wastewater, and the presence or absence of clogging.

For example, if the concentration of suspended solids is high and there is occlusion, the pitch is 100mm, whereas if the concentration of suspended solids is low and there is no occlusion, the pitch is 60mm.
mm or about 30mm.

5 and 6 show a second embodiment of this invention.

Here, the difference from the case of the first embodiment is as follows.
As the corrugated substrate 1 forming the inclined tube block 10, one type of corrugated substrate 1 having forward upwardly inclined uneven portions 2 and 3 made using one type of mold is turned upside down (i.e., in the vertical plane
(rotated 180°) at the point of use.

As shown in FIG. 5, one type of corrugated substrate 1 has a dimension a at the lower right end equal to a dimension a' of the inclined convex portion 3 at the upper left end, and a dimension c at the upper right end. is equal to the dimension c' of the lower left end.

The other points of this second embodiment are the same as those of the first embodiment, so the same parts are given the same reference numerals in the drawings.

FIG. 7 shows an inclined pipe block 10 according to this invention.
This shows a modification of .

Here, the difference from the case of the first embodiment is as follows.
The inclined pipe block 10 includes a first inclined pipe group A having a large number of water passage pipes 4 inclined upward at the front, and a second inclined pipe group A having a large number of water passage pipes 4 inclined upward at the rear.
Inclined tube groups B are alternately and integrally connected one by one through intermediate partition plates 7, and both inclined tube groups A and B are arranged in a three-dimensional intersecting state in a substantially X shape when viewed from the side. There is a certain point.

In this modification, at the connecting portion of two adjacent inclined tube blocks 10, 10 arranged in series, the direction in which suspended solids settle is determined for each of the first inclined tube group A and the second inclined tube group B. The difference from the first embodiment is that the level l1 of the open end of the upper water pipe 4 is higher than the level l2 of the open end of the lower water pipe 4. Therefore, in both the first inclined pipe group A and the second inclined pipe group B, there is no blockage in the pipe line 4 due to suspended solids, and the wastewater treatment efficiency is extremely high. It produces the same effect of being present.

According to this modification, the mechanical strength of the block itself is greatly increased, so the block is not crushed or deformed during transportation and installation, and workability is extremely high. There are advantages.

In the above embodiment, since the side plates 5 and 6 are joined to both the left and right sides of the inclined pipe block 10, the strength of the inclined pipe block 10 is further increased. 6
At least one of these may be omitted in some cases.

In addition, in the above embodiment and modification, the cross-sectional shape of the uneven portions 2 and 3 of the corrugated substrates 1, 1a, and 1b is (Q)
The water passage pipe 4 has a hexagonal cross section, but it may also be a square, an octagon, a circle, or an oval shape such as an ellipse.

Effects of the Invention As described above, this invention has a corrugated substrate having a large number of front upwardly slanted concavities and convexities of a predetermined pitch and arranged in parallel. It is equipped with a substantially rectangular parallelepiped-shaped inclined pipe block having a large number of forward upwardly directed water passage pipes formed by joining the bottom wall and the top wall of the inclined convex part in a superimposed state, and arranged in series. At the connection point between two adjacent inclined pipe blocks, the open end of the water passage at the rear end of the front inclined pipe block is connected to the open end of the corresponding water passage at the front end of the rear inclined pipe block. In the inclined tube sedimentation device, the level of the open end of the water flow pipe at the rear end of each inclined pipe block is higher than the level of the open end of the corresponding water flow pipe at the front end of the same block. During the manufacture of inclined tube blocks, due to tolerances in cutting the laminated corrugated substrates and due to differences in the height of the support frames on which the inclined tube blocks are mounted, it is difficult to connect two inclined tube blocks arranged in series. Even if there is a gap in the connection part, suspended solids will not easily settle in the connection part, and the inside of the pipe of the inclined pipe block will not be blocked at all. The falling suspended solids can fall smoothly into the pipe of the next inclined pipe block, and the suspension rising from below can also flow into the pipe of the next inclined pipe block without disturbing its flow. The effect is that the wastewater can be transferred smoothly into the pipeline, eliminating the conventional problem of reduced sedimentation area due to blockage of the pipeline at the connecting part of the inclined pipe block, and resulting in extremely high wastewater treatment efficiency. play.

[Brief explanation of the drawing]

Figures 1 to 4 show the first embodiment of this invention. Figures 1 and 2 are enlarged front views of two types of corrugated boards, and Figure 3 shows the connection state of two inclined pipe blocks. 4 is a front view with the left side plate removed, and FIG. 4 is a partially cutaway perspective view of one inclined pipe block. Figures 5 and 6 show a second embodiment of this invention, with Figure 5 being an enlarged front view of one type of corrugated board, and Figure 6 showing the connection state of two inclined pipe blocks. , is a front view with the left side plate removed. FIG. 7 is a partially cutaway perspective view of a tilted tube block showing a modification of this invention.
FIG. 8 shows a state in which two conventional inclined pipe blocks are connected, and is a front view with the left side plate removed. 1, 1a, 1b...corrugated substrate, 2...slanted recess, 2a...bottom wall, 3...slanted protrusion, 3a...
Top wall, 4... Water pipe, 5, 6... Left and right side plates, 1
0... Inclined pipe block.

Claims (1)

[Scope of utility model registration request] A corrugated substrate 1 having a large number of front upwardly inclined uneven portions 2 and 3 of a predetermined pitch and arranged in parallel.
However, the bottom wall 2a of the inclined concave portion 2 and the top wall 3a of the inclined convex portion 3, which are adjacent to each other and face each other, are joined together in an overlapping state, and a large number of water flow pipes 4 are directed upward toward the front. The opening end of the water flow pipe 4 at the rear end of the front inclined pipe block 10 is provided with a substantially rectangular parallelepiped inclined pipe block 10 having In the inclined tube settling device, the opening end of the corresponding water passage pipe 4 at the rear end of each inclined pipe block 10 is connected to the open end of the corresponding water passage pipe 4 at the front end of the rear inclined pipe block 10. A sloped pipe block in a sloped pipe sedimentation device, wherein a level l1 of the block 10 is higher than a level l2 of the open end of the corresponding water flow pipe 4 at the front end of the block 10.