JPH0426882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a filtration device for filtrating solid matter, such as suspended solids, or recovering metal powder, from wastewater.

[Conventional technology]

There are dozens of types of filtration equipment on the market, but they can be broadly categorized into (1) materials that are made of metal, fiber, or resin; to remove solid matter. (2) A fixed bed made of materials such as sand or anthracite, which drains wastewater from the top to the bottom to remove solids from the wastewater; (3) A method in which materials such as sand or anthracite move and come into contact with wastewater. , which removes solids from wastewater.

The present invention is classified into (1). The problem with filtration equipment is not the over-processing, but material clogging due to solid matter adhering to the material, and the backwashing mechanism to relieve this clogging.

Conventional backwashing mechanisms are: (1) a mechanism that injects pressurized air or pressurized water from the opposite direction to the pasting direction; (2) a mechanism that mechanically scrapes off solid matter adhering to the cleaning surface; and (3) a mechanism that removes solid matter adhering to the cleaning surface. There are two types of mechanisms: (4), (2) and (3), a mechanism that mechanically scrapes off solid materials while vibrating a combined surface.

[Problem that the invention seeks to solve]

The filtration method of the present invention is classified into (1), and generally the method for removing solid matter adhering to the filtration surface is to spray pressurized air or pressurized water from the opposite direction to the filtration step, or to
The solid matter was scraped off while vibrating the passing surface, but none of these methods were able to remove the adhering solid matter sufficiently, and the passing process gradually became shorter, eventually leading to failure. This is because solid matter in the wastewater gets into the pores of the material during the overprocessing, and even if you try to remove the solid matter out of the pores during backwashing, pressurized air or pressurized water for backwashing is sprayed uniformly onto the surface of the material. Without,
This is because only the part where the solid matter has peeled off is ejected, and the surface does not return to its original state.

The present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide a filtration device in which captured solids can be easily peeled off and the filtration and backwashing steps can be repeated endlessly.

[Means for solving problems]

The structure of the present invention for achieving the above object is as follows:
To explain using FIGS. 1 to 4 corresponding to embodiments, the present invention has plate-like bodies 1, 1 disposed at both ends, a stretchable member 2 fixed between the plate-like bodies 1, 1, and An outer cylinder 3 having flexibility around the space between the plate-like bodies 1 and 1
The strainer 4 is covered with a raw water inflow pipe 5, the material 2 is provided with a treated water discharge pipe and a backwash water extraction pipe 6, and the strainer 4 is provided with a telescopically lockable engagement tube 4. Technical measures have been taken to provide a stop 7.

[Effect]

The present invention uses the above-mentioned means to press the material 2 formed of spring steel wire or plastic spring together with the outer cylinder 3 by the locking tool 7 provided on the plate-like body 1 of the outer cylinder 3 during the normal over-processing. However, the width of the slit 8 between the spring wires is compressed to 30 to 50μ, resulting in over-processing, and raw water flows into the outer cylinder 3 from the raw water inflow pipe 5, and the solids in the raw water are captured by the slit 8 between the spring wires. The filtrate passes through the spring wire slit 8, passes through the upper treated water discharge pipe and backwater withdrawal pipe 6, the treated water discharge valve 9 opens, the backwash water discharge valve 10 closes, and is discharged to the outside. .

Next, in the backwashing process, the spring steel wire or plastic spring of the pressed material 2 is stretched together with the outer cylinder 3 by the operation of the locking tool (cam) 7 attached to the plate-shaped body 1. The inter-spring slit 8 is opened by 1 to 2 mm, and the solid matter trapped in the spring-wire inter-spring slit 8 is peeled off and separated, and is backwashed by the inflow raw water or pressurized air from the raw water inflow pipe 5.
The raw water and solids pass between the materials 2 and inside the materials 2, pass through the treated water discharge pipe and backwash water withdrawal pipe 6, the backwash water withdrawal valve 10 opens, the treated water drain valve 9 is closed, and are discharged to the outside of the system. be done.

Incidentally, since the upper plate-shaped body 1 moves up and down by the operation of the locking device (cam) 7, a flexible joint 11 is attached to the treated water and backwash water outlets.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

4 has circular or square plate-shaped bodies 1, 1 made of synthetic resin facing each other at both the upper and lower ends, and is made of a spring steel wire or plastic spring with a triangular cross section, with one side of the triangular shape facing outward. Spring wire slit 8
A spirally wound material 2 with a width of 1 to 2 mm is clamped and fixed between approximately the center of the plate-like bodies 1, 1, and the outside between the plate-like bodies 1, 1 is covered with a material such as synthetic rubber. This is a container sealed with a flexible outer cylinder 3. Reference numeral 5 denotes a raw water inflow pipe that is attached to the lower plate-like body 1 between the outer cylinder 3 and the material 2 of the strainer 4 and allows raw water to flow therein. Reference numeral 6 denotes a treated water discharge pipe and backwash water extraction pipe that penetrates the upper plate-like body 1 and communicates with the inside of the material 2, and a flexible joint 11 that can be vertically expanded and contracted is located near the plate-like body 1 of the pipe 6. is connected. The downstream side of the pipe 6 is branched into two paths, each of which is provided with a switchable treated water drain valve 9 and a backwash water drain valve 10. 7 is a locking tool (cam) for pressing the width of the slit 8 between the spring wires of the material 2 to 30 to 50μ, and the locking tool (cam) 7 is a support raised from the bottom of the plate-shaped body 1 below. held by a body (not shown).

The spring of the material 2 of the present invention is formed into a triangular cross section,
By positioning one side of the triangle outward,
During the over-processing, the solids are deep into the triangular slit between the spring wires formed on the outer surface of the material 2, which is made up of two arcuate surfaces, like the spring shown in FIG. 4, which has a circular cross section. This is because there is a possibility that solid matter may not be completely removed even if backwashing is performed.

In addition, the backwashing process in the above example uses a locking tool (cam).
By operation 7, the slit 8 between the spring wires of the material 2 is opened, raw water is introduced from the raw water inflow pipe 5 to backwash the material 2, and the backwash water is removed from the treated water discharge pipe and backwash water extraction pipe 6. Although the configuration is such that it is discharged outside the system via a branch pipe with 10,
Without being limited to the above-described embodiment, a new backwash water drain pipe (not shown) is provided at an appropriate location in the filter unit 4 without providing a branch pipe having a backwash water drain valve 10, and a treated water drain valve is installed. Pressurized air or pressurized water may be introduced into the material 2 through 9 and discharged from the system through a backwash water extraction pipe (not shown) after backwashing.

In addition, in the above embodiment, the treated water discharge pipe and backwash water withdrawal pipe 6 was configured to have a branch pipe having a treated water drainage valve 9 and a backwash water withdrawal valve 10, but each material 2 was subjected to an individual treatment. It is also possible to have a configuration in which the water discharge pipe and the backwash water extraction pipe are connected.

[Effect of idea]

In the present invention, plate-like bodies are disposed at both ends, a stretchable material is fixed between the plate-like bodies, and the circumference between the plate-like bodies is covered with a flexible outer cylinder to form a supercontainer.
The filter is equipped with a raw water inflow pipe and the material is equipped with a treated water discharge pipe and a backwash water extraction pipe, and the filter is equipped with a locking device that can expand and contract the filter, so the spring steel wire or As the plastic spring stretches, the slits between the spring wires open, and the solid matter trapped between the slits can easily peel off and separate.
This has the effect that the filtration and backwashing steps can be repeated endlessly.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the process of the present invention;
3 is an enlarged sectional view showing the material of the invention, and FIG. 4 is an enlarged sectional view showing another embodiment of the method shown in FIG. 3. Explanation of the symbols 1... plate-shaped body, 2... material, 3...
...outer cylinder, 4...filter, 5...raw water inflow pipe, 6...
... Treated water discharge pipe and backwash water extraction pipe, 7 ... Locking tool, 8 ... Spring line slit, 9 ... Treated water drainage valve, 10 ... Backwash water removal valve, 11 ... Flexible joint , 12...solid matter.

Claims (1)

[Claims] 1. Plates are arranged at both ends, a stretchable material is fixed between the plates, and a flexible outer cylinder is covered between the plates to form a supercontainer. A filtration device characterized in that the filtration device is provided with a raw water inflow pipe, a treated water discharge pipe and a backwash water extraction pipe are provided on the filtration device, and a locking device is provided in the filtration device, which can extend and contract the filtration device. 2. The winding device according to claim 1, wherein the material is a coiled spring having a triangular cross section and spirally wound so that one side of the material faces outward.