JPH09187767A - Filter apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a filter apparatus of a clarification apparatus for drinking water which cleans raw water stored in a fire fighting water tank, a pool, etc., so as to utilize it as a drinking water when a disaster occurs. SOLUTION: A first storing room 7 and a second storing room 8 are formed in a storing case 5 and a preprocessing filter 9 for primary filtering of bacteria and impurities with large shapes is stored in the first storing room 7 and a hollow fiber membrane filter 10 for filtering of bacteria and impurities with fine shapes is stored in the second storing room 8 to miniaturize a filter apparatus. In addition, by forming a supplying path 17 for introducing water filtered by the preprocessing filter 9 into the second storing room 8 in the bottom plate covering the bottom face of the storing case, the pipeline structure can be simplified and the filter apparatus can be miniaturized further.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device for a drinking water purifying device.

[0002]

2. Description of the Related Art Conventionally, for various drinking water, water purified from water (hereinafter referred to as raw water) stored in a fire prevention water tank or a pool in the event of a disaster is produced as purified water that can be used as drinking water. Purification equipment exists. The most important part of such a drinking water purifier is a filter device for filtering bacteria and contaminants in water.

A hollow fiber membrane filter using a hollow fiber membrane is known as such a filter device. This hollow fiber membrane filter can filter fine particles of about 0.1 μm, and can surely remove Escherichia coli and other bacteria having a size of 1 to several μm. In addition, in the case of the hollow fiber membrane filter, when contaminants are attached to the surface of the hollow fiber membrane and the filtration performance is deteriorated, the once filtered purified water is flowed in the opposite direction to the filtration to wash the attached contaminants. Backwash.

[0004] However, when raw water in a fireproof water tank or a pool is directly filtered by a hollow fiber membrane filter, algae floating in the water and contaminants of large particles adhere to the surface of the hollow fiber membrane filter, and Filtration performance deteriorates in a short time. Therefore, backwashing must be performed frequently, and the production of purified water is interrupted during backwashing, resulting in a significant decrease in the efficiency of purified water production. Furthermore, since algae are sticky, it is difficult to reliably remove algae adhering to the surface of the hollow fiber membrane even if backwashing is performed, and the filtration performance of the hollow fiber membrane filter cannot be sufficiently restored. . Therefore, before the filtration with the hollow fiber membrane filter, the pretreatment filter is used to filter algae and contaminants of large particles.

[0005]

However, when the pretreatment filter and the hollow fiber membrane filter are used, a large space is required for installing these two types of filters, and the pretreatment filter and the hollow fiber filter are used. The piping structure between the membrane filter and the filter becomes complicated, and the size of the filter device increases, which in turn increases the size of the drinking water purification device.

Therefore, in the portable drinking water purifying apparatus,
It is difficult to provide a pretreatment filter and a hollow fiber membrane filter.

[0007]

According to the first aspect of the present invention,
A storage case having a first storage chamber and a second storage chamber partitioned by a partition plate, a pretreatment filter stored in the first storage chamber, and a hollow fiber membrane filter stored in the second storage chamber. An inlet for introducing raw water into the first storage chamber, a supply passage for guiding water filtered by the pretreatment filter into the second storage chamber, and purified water filtered by the hollow fiber membrane filter in the storage case. It has a drainage port for draining to the outside. Therefore, the pretreatment filter and the hollow fiber membrane filter are housed in one housing case, the filter device is miniaturized, and the drinking water purifying device using the filter device is miniaturized.

According to a second aspect of the present invention, in the first aspect of the invention, since the supply passage is formed in the bottom plate that covers the bottom surface of the storage case, the water filtered by the pretreatment filter is supplied into the second storage chamber. The piping structure for simplification is simplified, the filter device is further downsized, and the drinking water purification device using this filter device is downsized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional front view showing the overall structure of the filter device, which includes a cylindrical side wall 1, a bottom plate 2 fixed to one end of the side wall 1, and a top plate fixed to the other end of the side wall 1. A storage case 5 is provided which is composed of a top cover 3 and a top cover 4 which is detachably attached to a position covering the top plate 3. A partition plate 6 is provided inside the storage case 5, and the inside of the storage case 5 is partitioned by the partition plate 6 into a first storage chamber 7 and a second storage chamber 8.

Two pretreatment filters 9 are detachably accommodated in the first storage chamber 7, and the second storage chamber 8 is detachable.
Three hollow fiber membrane filters 10 are detachably housed therein. On the bottom plate 2, a positioning protrusion 11 for positioning the mounting position of the pretreatment filter 9 and a positioning protrusion 12 for positioning the mounting position of the hollow fiber membrane filter 10 are fixed. The top plate 3 is formed with openings 13 and 14 for attaching and detaching the pretreatment filter 9 and the hollow fiber membrane filter 10, and the upper lid 4 surrounds these openings 13 and 14.

The pretreatment filter 9 has a cylindrical wall portion 9a made of polypropylene having a predetermined wall thickness, and a hollow portion 9b is formed in the central portion thereof. In this pretreatment filter 9, when raw water passes from the outer peripheral side of the cylindrical wall portion 9a to the hollow portion 9b, algae and contaminants of approximately 0.3 μm or more are filtered.

In the hollow fiber membrane filter 10, a large number of hollow fiber membranes 10a each having a large number of slit-shaped holes formed in the wall surface of a macaroni-shaped hollow fiber having a central hole at the center are bundled around a central tube 10b. The outer cylinder 10 around the hollow fiber membrane 10a of
It is surrounded by c. A large number of slits (not shown) through which water freely flows in and out are formed in the outer cylinder 10c. When the water in the second storage chamber 8 passes through the slit of the outer cylinder 10c and reaches the outer circumference of the hollow fiber membrane 10a, the water passes through the slit-shaped holes of the hollow fiber membrane 10a and the hollow fiber membrane 10a.
From the outer peripheral surface of a to the central hole of the hollow fiber membrane 10a, at this time, the inflow of bacteria or contaminants of about 0.1 μm or more is blocked and the particles of less than 0.1 μm pass, and each hollow fiber membrane 10a performs filtration. The purified water generated by the process is collected in the central cylinder 10b. A plurality of stoppers 15 for sealing the upper end portions of the pretreatment filter 9 and the hollow fiber membrane 10 are attached to the upper lid 4 so as to be adjustable in tightening.

The side wall 1 is formed with an inflow port 16 for introducing raw water such as a fire protection water tank or a pool into the first storage chamber 7. In the bottom plate 2, a supply passage 17 for guiding the water filtered by the pretreatment filter 9 into the second storage chamber 8.
And three drain outlets 18 for draining the purified water filtered by each hollow fiber membrane filter 10 to the outside of the storage case 5, a drain passage 19 for collecting the purified water drained from each drain outlet 18, and a first storage chamber. A drain port 20 for draining the raw water in 7 and a drain port 21 for draining the water in the second storage chamber 8 are formed. A pipe (not shown) connected to the drain ports 20 and 21 is provided with a switching valve for opening and closing the pipe.

In such a structure, first, the procedure for mounting the pretreatment filter 9 and the hollow fiber membrane filter 10 in this filter device will be described. The upper lid 4 is removed to expose the openings 13 and 14. This opening 13, 14
The pretreatment filter 9 and the hollow fiber membrane filter 10 are put into the storage case 5, and the lower end portion of the
12 to fit and position. Next, the upper lid 4 is attached, the upper ends of the pretreatment filter 9 and the hollow fiber membrane filter 10 are closed with the stopper 15, and the first storage chamber 7 and the second storage chamber 8 are made airtight.

Pretreatment filter 9 and hollow fiber membrane filter 10
With respect to the storage case 5 in which is stored, a water absorption hose (not shown) for absorbing raw water such as a fire protection water tank or a pool is connected to the inflow port 16 by a pipe (not shown) via a pump (not shown). Further, a water purification pipe (not shown) for guiding purified water is connected to the tip of the drainage passage 19 to drive the pump.

When the pump is driven, raw water such as a fireproof water tank or a pool flows into the first storage chamber 7 from the inflow port 16 through the pump. This raw water passes through the cylindrical wall portion 9a of the pretreatment filter 9 from its outer peripheral side to the hollow portion 9b, and in the process of this passage, a large amount of algae or contaminants of approximately 0.3 μm or more contained in the raw water is obtained. The part is collected.

The water that has entered the hollow portion 9b after most of the algae and contaminants of large particles are collected by the pretreatment filter 9 passes through the supply passage 17 formed in the bottom plate 2 and the second storage chamber. 8 is led. The water guided into the second storage chamber 8 passes through the slits formed in the outer cylinder 10c to reach the outer peripheral surface of each hollow fiber membrane 10a, and passes through the slit-shaped holes of each hollow fiber membrane 10a. From the outer peripheral surface of the hollow fiber membrane 10a to the central hole of the hollow fiber membrane 10a, at this time, passage of fine bacteria and contaminants of up to approximately 0.1 μm is blocked, and the beverage does not contain fine bacteria and contaminants. It becomes suitable purified water. The purified water filtered by each hollow fiber membrane 10a is collected in the central tube 10b of the hollow fiber membrane filter 10, and the purified water collected in the central tube 10b is drained from the drain port 18 and then collected into one by the drainage passage 19. Water is collected and supplied through a water purification pipe connected to the tip of the drainage passage 19.

Here, according to this filter device, since the pretreatment filter 9 and the hollow fiber membrane filter 10 are housed in the single housing case 5, the structure is very compact, and this filter device is used. The drinking water purifying device is miniaturized and can be easily put to practical use. Moreover, in this filter device, the pretreatment filter 9
The bottom plate includes a supply passage 17 for guiding the primary filtered water in the hollow fiber membrane filter 10 into the second storage chamber 8 and a drain passage 19 for collecting the purified water filtered in each hollow fiber membrane filter 10 into one. Since it is formed in 2, the piping structure of these supply passage 17 and drain passage 19 becomes simple.

[0019]

According to the invention described in claim 1, since the pretreatment filter and the hollow fiber membrane filter are housed in one housing case, the filter device can be downsized and the filter device can be used. It is possible to reduce the size of the drinking water purifying device and improve the portability.

According to the second aspect of the present invention, the feed passage for guiding the water filtered by the pretreatment filter into the second storage chamber in which the hollow fiber membrane filter is stored is formed in the bottom plate of the storage case. The piping structure for sending the water filtered by the filter to the hollow fiber membrane filter side can be simplified and the filter device can be further downsized, and the drinking water purification device using this filter device can be further improved. It can be miniaturized.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a plan view thereof.

[Explanation of symbols]

 2 Bottom plate 5 Storage case 6 Partition plate 7 First storage chamber 8 Second storage chamber 9 Pretreatment filter 10 Hollow fiber membrane filter 16 Inlet port 17 Supply passage 18 Drain port

Claims (2)

[Claims] 1. A storage case having a first storage chamber and a second storage chamber which are partitioned by a partition plate, a pretreatment filter stored in the first storage chamber, and a pretreatment filter stored in the second storage chamber. A hollow fiber membrane filter, an inlet for introducing raw water into the first storage chamber, a supply passage for guiding the water filtered by the pretreatment filter into the second storage chamber, and a hollow fiber membrane filter. A filter device comprising: a drainage port for draining purified water to the outside of the storage case. 2. The filter device according to claim 1, wherein the supply passage is formed in a bottom plate that covers a bottom surface of the storage case.