JPH11244844A - Laver waste water cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cleaning device for efficiently and continuously cleaning waste water in a laver treating line. SOLUTION: A cleaning device of laver waste water is formed by successively combining a waste water feed means, a solid-liquid separation means 21, a foam separating means and a purified water transferring means. The solid-liquid separating means is provided with an inner cylinder 3 provided with many vent holes on the side wall and vertically provided in an outer vessel 1, a spiral brush 4 for separating and transferring a solid material, capable of cleaning the wall surface of the inner cylinder and provided freely rotatably in the inner cylinder and a solid material discharging port 8 provided at the upper part of the inner cylinder. Further, the foam separating means has a partition plate vertically provided in the outer vessel to divide into a waste water vessel 9 and a cleaned water vessel 11, a water passing hole 12 is provided at the lower part of the partition plate, a flow-in hole for the waste water separated from solid and a farm discharging port are provided in the waste water vessel and a purified water transferring means is provided in the cleaned water vessel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for purifying wastewater (mainly seawater wastewater) generated in a laver processing line,
The present invention relates to an apparatus for purifying laver drainage for the purpose of making it reusable.

[0002] Even when the wastewater is not used for circulation, environmental pollution can be prevented beforehand by purifying the wastewater and discharging it to the outside world.

[0003]

2. Description of the Related Art Conventionally, for purifying wastewater generated during laver processing, filtration processing is often used. For example, a filtration tank for laminated sand, a filtration tank using a filter, and the like are conceivable.

[0004]

In the above, the laminated sand layer (laminated with gravel, gravel and fine sand) has a good filtration performance, but is often of a natural filtration system (permeation by water pressure), so that the efficiency is low. Not only is it bad, there is a risk of clogging, and there is a problem that a large filtration tank is required when processing a large amount of wastewater.

In the case of using a filter, the efficiency can be controlled by the size of the permeation hole of the filter. However, if a relatively large permeation hole is used in order to improve the efficiency, a solid material having a size corresponding to this is used. When the size of the permeation hole is reduced, not only efficiency is reduced but also clogging may be easily caused. Therefore, there is a problem that the filter cannot be used unless the filter is frequently cleaned.

[0006]

However, according to the present invention, a relatively large solid is separated by a solid-liquid separating means, and fine particles (for example, up to about 2 microns) are removed by being entangled in a foam. It was efficient and reliable cleansing without producing.

That is, the present invention is an apparatus for purifying laver wastewater, characterized by sequentially connecting a wastewater feeding means, a solid-liquid separation means, a foam separation means, and a pure water transfer means. Further, the solid-liquid separation means vertically installs an inner cylinder having a large number of water passage holes in a side wall while maintaining a predetermined gap in the outer tank, separates and transfers solids into the inner cylinder, and cleans the inner cylinder wall surface. A spiral brush that can be rotatably mounted inside, and a solid discharge port is provided at the top of the inner cylinder. The foam separation means is divided vertically into a drain tank and a clean water tank by vertically installing a partition plate inside the outer tank. A water hole is provided in the lower part of the partition plate, an inflow hole for solid-liquid separated wastewater and a foam discharge hole are provided in the drainage tank, and the pure water tank is provided with pure water transfer means.

[0008] In the above, in the foaming treatment, fine particles of about 2 microns, which can hardly be separated by the ordinary filtration method, can be sufficiently captured, so that a treatment close to complete purification is possible. Also, relatively light dissolved substances that are not particles (for example, sewage from raw laver) can be removed by entraining in foam.

The solid-liquid separating means described above is not necessarily a spiral brush cylinder, but may be a conventionally known solid-liquid separating apparatus for relatively large particles.

Although the present invention is directed to wastewater during laver processing, it can also be applied to, for example, the treatment of solid-liquid mixed wastewater discharged during food production.

Further, fine bubbles can be generated to promote the formation of foam. Further, the purified water can be supplied to a desired place (reuse place) by using a submersible pump or the like, and can be recycled as purified water. Therefore, even when seawater is used for raw seaweed processing, a relatively small amount of seawater is circulated and rationalized without using a large amount of seawater, and high-quality seaweed processing is performed using relatively little seawater. Can be done.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention separates solid and liquid wastewater by foam treatment, and easily separates solid fine particles (for example, particles having a size of about 2 μm) which can be permeated by small-pore filtration of punching metal or the like. Can be separated.
Therefore, the solid-liquid separated waste water can remove even smaller solid fine particles by foam treatment.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. A water-permeable inner cylinder 3 having a large number of small holes 2 and 2 is vertically provided in a side wall while keeping a predetermined interval S in the outer tub 1. A spiral brush 4 that is in sliding contact with the inner wall of the cylinder 3 is rotatably mounted. The spiral brush 4
Is a method in which synthetic resin fibers 6 are spirally and radially implanted on the rotating shaft 5, and the outer ends of the synthetic resin fibers 6 are in sliding contact with the inner wall of the inner cylinder 3 so that the inner wall can be cleaned. .

At the lower part of the outer tank 1, there is provided a drain pipe 7 for discharging the discharged liquid after solid-liquid separation, and at the upper part of the outer tank 1, there is connected a discharge port 8 for separated solid matter which is splashed by a blade 31. It is set up. The drain pipe 7 is connected and opened to a drain tank 9, and the drain tank 9 is connected to a water tank 11 through a partition plate 10. A water passage hole 12 is provided at a lower portion of the partition plate 10 so that pure water from which solid fine particles have been removed from drainage is guided to a water tank 11. In the figure, reference numeral 13 denotes a cover of the drainage tank 9, 1
4 is a foam drain pipe, 15 is an overflow pipe of the water tank 11, 16 is a drain pipe, and 17 is a submersible pump. In FIG. 2, 35 and 36 are feed pipes, and 37 is a drain pipe. If there is more than one device to feed the wastewater,
Multiple feed pipes are required.

In the above embodiment, the wastewater to be treated is
As shown by an arrow 19, the liquid is fed into a lower portion of the inner cylinder 3 from a feed pipe 18 provided at a lower portion of the outer tank 1.

Then, when the motor 20 is started, the rotating shaft 5 of the spiral brush 4 is rotated, so that the solid matter in the drainage is filtered by the side wall of the inner cylinder 3. In this case, since the tip of the spiral brush 4 slides on the inner wall of the inner cylinder 3, the inner cylinder 3 is not likely to be clogged. In FIG. 1, reference numeral 30 denotes a casing of the drain port.

The wastewater separated by the solid-liquid separator 21 enters the drainage tank 9 through the drainage pipe 7 as shown by arrow 23. The foam 25 generated in this case floats on the water surface of the drainage tank 9 and is discharged from the discharge pipe 14 of the foam 25 as indicated by an arrow 24. The solid material is raised in the inner cylinder 3 by the helical brush 4, and then discharged to the outlet 8 provided in the upper part of the outer tub 1.
From the blade 31 and is discharged to the outside as indicated by an arrow 26. In this case, a large amount of foam is generated in the drain tank 9, but is entirely discharged from the drain pipe 14. Further, the water purified in the drainage tank 9 enters the water purifying tank 11 through the water passage hole 12 below the partition plate 10 and is conveyed to the place of reuse as indicated by the arrow 32 by the submersible pump 17 (or). Drained to the outside world).

In the above, the solid fine particles in the waste water cannot be removed by a filter or the like.
Since the treatment is performed by involving the foam, the separation and removal can be performed easily, easily and with high efficiency. Since the foam in the drainage tank 9 contains a large amount of solid fine particles, it is necessary to appropriately discharge the foam to the outside. Since the cover 13 is hinged to the upper part of the partition plate 10 by the hinge 33, the cover 13
Can be opened as shown by arrow 34 to clean the inside.

If a bubble generator 22 is provided at the bottom of the drainage tank 9 to generate fine bubbles as indicated by arrow 27, the generation of the foam is promoted and the efficiency of separating solid-liquid fine particles is further improved. be able to. In this case, the bubble generating plate 22 is, for example, a porous hollow disk, and supplies pressurized air through a pipe 28 as indicated by an arrow 29.

[0020]

According to the present invention, since relatively large solids in the waste water are separated by filtration, and then the solid fine particles are foamed, the purification performance is remarkably improved, and the reuse or reuse of the treated water becomes possible. effective.

Also, when the treated water is drained, if the purified water is discharged to the outside after being purified, there are various effects such that the problem of environmental pollution can be solved at once.

However, since the filtration device has no risk of clogging, continuous operation is possible and the efficiency is good. Therefore, a relatively small solid-liquid separation device (filtration device) can sufficiently discharge wastewater such as laver treatment. There is also an effect that can be processed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view in which a part of an embodiment of the present invention is omitted.

FIG. 2 is a plan view partially omitted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer tank 2 Small hole 3 Inner cylinder 4 Spiral brush 5 Rotating shaft 6 Synthetic resin fiber 7 Drain pipe 8 Outlet 9 Drain tank 10 Partition plate 11 Water tank 12 Water hole 13 Cover 14 Drain pipe 15 Overflow pipe 16 Drain pipe 17 Submersible pump 18 Feed pipe 20 Motor 21 Solid-liquid separator 22 Bubble generator 25 Foam 28 Pipe 30 Cover 31 Blade 32 Hinge 35, 36 Feed pipe 37 Drain pipe

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 29/30 501 520A

Claims (3)

[Claims] 1. An apparatus for purifying laver wastewater, wherein a wastewater feeding means, a solid-liquid separation means, a foam separation means, and a pure water transfer means are sequentially connected. 2. The solid-liquid separation means comprises: an inner cylinder having a plurality of water holes formed in a side wall thereof with a predetermined gap kept in an outer tank, and separating and transferring solids into the inner cylinder; 2. The apparatus for purifying laver drainage according to claim 1, wherein a spiral brush capable of cleaning the wall surface of the cylinder is rotatably provided, and a solid matter discharge port is provided at an upper portion of the inner cylinder. 3. The foam separating means includes a partition plate vertically installed in an outer tank, which is divided into a drain tank and a pure water tank. A water hole is provided in a lower portion of the partition plate, and a solid-liquid is provided in the drain tank. 2. The apparatus for purifying laver wastewater according to claim 1, wherein an inlet for the separated wastewater and a foam discharge hole are provided, and the purifying tank is provided with a purifying water transfer means.