JPH08323113A - Disposable multistage filter - Google Patents

Abstract

PURPOSE: To install a filter in a small space, to sufficiently use the ability of a filter element and to prolong a replacement period of a unit vessel. CONSTITUTION: A filter comprises pressure vessels 1, 2 and plural disposable unit vessels 10, 20 set inside the vessels 1, 2, respectively. The unit vessels 10, 20 are each provided with shutoff valves for forming flow passages by setting them in the pressure vessels 1, 2 and for closing the flow passages by removing them. The unit vessels 10, 20 each incorporates filter elements 11, 21 having different filtering precision, which are connected so that a liquid to be filtered can be filtered in order from the filter element of low filtering precision to the filter element of high filtering precision. A liquid before filtration or a liquid after filtration is passed through bypass pipes 19, 29 in the unit vessels 10, 20 as it is.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-use disposable filtration device using a disposable unit container incorporated in a line.

[0002]

2. Description of the Related Art Conventionally, as a disposable filter having a double structure using a disposable unit container, Japanese Patent Application Laid-Open No. 4-2 is known.
A double structure filter container having a structure as shown in FIG. 6 disclosed in Japanese Patent No. 25806 is known. This double structure filter container is composed of a disposable unit container 42 containing the filter element 41, and a pressure resistant container containing the unit container 42. The pressure-resistant container is composed of a lower pressure-resistant container 43 and an upper pressure-resistant container 44, and the lower pressure-resistant container 43 has a liquid introduction port 45 connected to a line pipe.
And a liquid discharge port 46 are integrally formed with a pedestal. When the filter element is clogged, this double structure filter container is replaced with a new filter element together with the unit container and is continuously used.

[0003] By the way, in the case where the filter element is clogged due to the accumulation of contaminants on its surface layer, even if the inside of the filter element still has the ability to capture the contaminants, the filter element is It can no longer be used as a filter medium and must be replaced at that time.

In general, as a method of drawing out the ability of the filter element sufficiently, extending the life as a filter medium, and prolonging the replacement cycle, a filter element with coarse mesh (low filtration accuracy) to fine mesh (with low filtration accuracy) is used. It is known to provide stepwise filtration to (high) filter elements. However, when a plurality of double structure filter containers having different filtration accuracy are installed, in addition to installing a plurality of double structure filter containers, a separate pipe for connecting the double structure filter containers is required. For example, a considerably large space is required to install the device.

[0005]

The inventors of the present invention have completed the present invention as a result of intensive studies in view of the above-mentioned circumstances, and an object of the present invention is to provide a unit of a disposable portion containing a filter element. In a double-structure filtration device composed of a container and a pressure-resistant container for accommodating the unit container, it can be installed in a small space, and the foreign matter capturing ability of the filter element can be sufficiently drawn out, and the unit container replacement cycle (EN) Disclosed is a disposable multi-stage filtration device capable of lengthening the length.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a plurality of unit containers of a disposable portion containing a filter element and a plurality of the unit containers which are connected directly or through a connecting jig. A dual structure filtration device comprising a pressure resistant container to be housed, wherein the pressure resistant container is composed of an upper pressure resistant container and a lower pressure resistant container connectable to line piping, and each of the plurality of unit containers has a filtration accuracy of A bypass pipe that contains different filter elements and that allows filtered or unfiltered liquid to pass through from the upper end surface to the lower end surface of the unit container is provided, and a shut-off valve is provided on the upper end surface and the lower end surface of the unit container. In addition to the opening of the bypass pipe, a liquid inlet or a liquid outlet having a shutoff valve is provided, and the liquid is introduced into the upper end surface of the unit container connected to the uppermost portion. Alternatively, the liquid discharge port communicates with the bypass pipe opening portion of the upper end surface, and each of the stop valves has a structure in which the flow path is opened and disconnected when the unit containers are connected and the flow path is closed at the same time. Disposable multi-stage filtration characterized in that the liquid to be filtered supplied from the line piping is configured to sequentially pass from a filter element with low filtration accuracy to a filter element with high filtration accuracy for filtration. Achieved by the device.

[0007] The device of the present invention is basically a filtration device having a double structure consisting of a disposable unit container containing a filter element and a pressure resistant container containing the unit container. In the present invention, a plurality of unit containers are accommodated, and the filter elements contained in each unit container have different filtering accuracy. Further, the unit container has a bypass pipe communicating from the upper end face to the lower end face, and the upper end face and the lower end face are provided with an opening portion of the bypass pipe (hereinafter, referred to as “bypass opening portion”). The bypass pipe allows either the liquid before filtration or the liquid after filtration that has passed through each filter element to pass through as it is. In addition to the bypass opening, a liquid inlet or a liquid outlet is provided on the upper end surface and the lower end surface of each unit container.

The bypass opening, the liquid inlet and the liquid outlet are equipped with a stop valve that opens the flow path when the unit containers are connected and closes the flow path when the unit container is removed. There is. The shutoff valve has an action of preventing the liquid remaining in the unit container from leaking outside when the unit container is replaced.

The unit containers are connected in series to the passage of the liquid to be filtered, the bypass openings are connected to each other, and the liquid inlet and the liquid outlet facing each other are connected. It The liquid inlet and the liquid outlet can be connected by directly connecting the unit containers to each other, but it is preferable to insert and connect a reusable connecting jig.

Of the unit containers to be connected, the unit container to be connected to the uppermost part has a bypass opening provided on the upper end surface thereof in communication with the liquid introduction port or the liquid discharge port. The communication with the bypass opening may be performed by piping in the unit container, but it is preferable that a reusable upper end connecting jig is attached to the upper end surface of the unit container. .

The connection order of the respective unit containers is such that the liquid to be filtered is sequentially passed from the filter element having a low filtration accuracy to the filter element having a higher filtration accuracy. For example, when a unit container containing a filter element with high filtration accuracy is attached to the lower pressure container, the bypass opening at the lower end surface of the unit container and the liquid introduction pipe of the lower pressure container are connected to each other, and the liquid at the lower end surface is connected. Connect the outlet to the liquid outlet pipe of the lower pressure vessel. Hereinafter, the unit containers containing the filter elements with lower filtration accuracy are sequentially connected to the upper side, and the unit container containing the filter element with the lowest filtration accuracy is mounted on the top. The uppermost unit container communicates the bypass opening portion on the upper end surface with the liquid introduction port as described above.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a vertical cross-sectional view showing an embodiment of the disposable multi-stage filtration device of the present invention, FIG. 2 is an assembly cross-sectional explanatory view of a unit container in the device of FIG. 1, and FIG. 3 is a view of the device of FIG. FIG. 4 is an assembled cross-sectional view of the pressure-resistant container, and FIG. 4 is a transverse cross-sectional view taken along line XX ′ of the unit container of FIG. 1. FIG. 5 is a plan view showing a connecting jig in the apparatus shown in FIG.

The pressure resistant container is divided into a lower pressure resistant container 1 and an upper pressure resistant container 2, and they are integrated by a clamp 3. The lower pressure vessel 1 is provided with a liquid introduction pipe 4 and a liquid discharge pipe 5, and the outer sides of both pipe ends are directly connected to a liquid purification process line (not shown). The upper pressure-resistant container 2 has a structure and strength that supports the unit container inside and prevents deformation and damage due to internal pressure, and is preferably made of metal.

In the pressure vessel, a plurality of (2 in this embodiment)
Individual unit containers 10 and 20 are housed, and each unit container has a cylindrical filter element 11,
21 are built in each. The filter element 11 built in the unit container 10 is the unit container 20.
The filtration accuracy is higher than that of the filter element 21 incorporated in the. The unit containers are connected to each other via a connecting jig 6.

The unit container 10 has a bypass opening 12 and a liquid discharge port 15 on its lower end surface, and a bypass opening 13 and a liquid introduction port 14 on its upper end surface. Similarly,
The unit container 20 has a bypass opening 22 at its lower end surface.
And the liquid discharge port 25 are provided, and the bypass opening 23 is provided on the upper end surface.
And a liquid introduction port 24 are provided. Bypass opening 1
2, 13, 22, and 23 have shut-off valves 16a, 16 respectively.
b, 26a and 26b are provided, the liquid inlets 14 and 24 are provided with shutoff valves 17 and 27, and the liquid discharge ports 15 and 25 are provided with shutoff valves 18 and 28, respectively.

The bypass opening 13 of the unit container 10 and the bypass opening 22 of the unit container 20 are communicated with each other via the bypass pipe 31 of the connecting jig 6. Also,
The bypass opening 23 on the upper end surface of the unit container 20 and the liquid inlet 24 are communicated with each other via the bypass pipe 32 of the upper end connecting jig 7.

The bypass opening 12 at the lower end surface of the unit container 10 located below is connected to the liquid introduction pipe 4 of the lower pressure resistant container,
Similarly, the liquid discharge ports 15 are fitted and connected to the liquid discharge pipes 5, respectively. Liquid leakage is prevented by arranging O-rings (not shown) at the bypass opening, the liquid inlet, and the liquid outlet.

Each of the shutoff valves is biased by a spring so as to close the bypass opening, the liquid inlet or the liquid outlet.
When the unit container is connected to the connecting jig, the upper end connecting jig, or the lower pressure resistant container, the closing valve is pushed down to open the flow path, but when the connection is released, The shut-off valve returns to the position where it blocks the flow path, and the liquid remaining in the unit container is retained inside the unit container and does not leak outside.

The upper end of the connected unit containers is slightly pressed by the cushion material 8 and fitted and fixed in the pressure resistant container. In the present embodiment, the lower pressure-resistant container 1 and the upper pressure-resistant container 2 are fixed by the clamp 3, but the fixing method of the two is not particularly limited as long as it is a method of surely fixing such as screwing.

The disposable multi-stage filtration device of the above embodiment is
The liquid to be filtered flows in the direction of the arrow in the figure and is roughly filtered by the following mechanism. That is, first, the liquid to be filtered that has entered through the liquid introduction pipe 4 and the bypass opening 12 passes through the bypass pipe 19 of the unit container 10, the bypass pipe 31 of the connecting jig 6, and then the unit container 20. Bypass pipe 32 of the upper end connecting jig 7 passing through the bypass pipe 29 of
Through the liquid introduction port 24 of the unit container 20, is guided to the outside of the filter element 21, is press-fitted into the filter element, and is filtered in the process of passing inside.

The filtrate filtered by the filter element 21 then passes through the filtrate flow pipe 33 of the connecting jig 6 and flows from the liquid inlet 14 of the unit container 10 to the outside of the filter element 11 having higher filtration accuracy. It is guided, press-fitted into the filter element 11, and further filtered in the process of passing inside. The filtered filtrate is discharged from the liquid discharge port 15 to the liquid discharge pipe 5.

In the above filtration step, the upper and lower ends of the filter element are clamped by the upper end cap 34a and the lower end cap 34b in order to prevent the liquid on the outer side from short-circuiting and flowing inward from the end surface of the filter element. Each end cap has ring-shaped protrusions 35a, 35
b is provided and sealed to prevent liquid short circuit. This structure is the same in the unit container 20.

In the above filtering device, when the filter element is clogged, first stop the flow of the line,
If necessary, the liquid is returned to the line with an air blower, the clamp 3 is removed, and the upper pressure-resistant container 2 is lifted up by a handle 9 provided on the body of the upper pressure-resistant container to remove it. The container can be taken out and replaced with a new unit container. In the unit container, the closing valve is closed and the bypass opening, the liquid inlet and the liquid outlet are closed, so the liquid remaining in the unit container does not leak out, and it can be easily removed and transported. It does not pollute the surroundings. It should be noted that the unit container need only be replaced when it is no longer usable due to clogging, and the unit container that still has the filtering ability can be further used as it is.

In the filtration step, the liquid to be filtered is first filtered by the filter element 21 having a lower filtration accuracy to capture and remove the impurities having a relatively large particle size.
Then, it is microfiltered by the filter element 11 having a higher filtration accuracy, and the contaminants having a finer particle size are captured and removed. Therefore, since each filter element captures the contaminants according to its filtering accuracy, it is possible to sufficiently bring out the capacity as the filter medium without depositing an excessive amount of the contaminants on the surface layer portion, and to improve the durability. Will be improved. Although the above embodiment uses two unit containers, the apparatus of the present invention may use three or more unit containers as required.

[0025]

According to the apparatus of the present invention, since the liquid to be filtered is passed through the filter element in order of low filtration accuracy to be filtered, the surface layer portion of the filter element is prevented from catching and accumulating impurities more than necessary. The ability of the filter element to trap foreign matters can be sufficiently brought out, and the durability as a filter medium can be improved. Therefore, the replacement cycle of the unit container can be lengthened, which is extremely advantageous in terms of work. Further, since only the clogged unit container needs to be replaced, the non-clogged unit container can be further used, and a particularly expensive filter element having high filtration accuracy can be effectively used, It is extremely useful industrially.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a disposable multi-stage filtration device of the present invention.

FIG. 2 is an assembly cross-sectional explanatory view of the unit container according to the present invention shown in FIG.

3 is an assembly cross-sectional explanatory view of the pressure resistant container according to the present invention shown in FIG. 1. FIG.

FIG. 4 is a cross-sectional view taken along line XX ′ of the unit container shown in FIG.

5 is a plan view of the connecting jig shown in FIG. 1. FIG.

FIG. 6 is a vertical cross-sectional view showing an example of a conventional disposable filtration device.

[Explanation of symbols]

 1 Lower pressure vessel 2 Upper pressure vessel 3 Clamp 4 Liquid introduction pipe 5 Liquid discharge pipe 6 Connection jig 7 Upper end connection jig 8 Cushion material 9 Handle 10 Unit container 11 Filter element 12, 13 Bypass opening 14 Liquid introduction Port 15 Liquid outlet 16a, 16b Closing valve 17, 18 Closing valve 19 Bypass pipe 20 Unit container 21 Filter element 22, 23 Bypass opening 24 Liquid inlet 25 Liquid discharging port 26a, 26b Closing valve 27, 28 Closing valve 29 Bypass Pipe 31, 32 Bypass pipe 33 Filtrate flow pipe 34a Upper end cap 34b Lower end cap 35, 35b Ring-shaped protrusion 41 Filter element 42 Unit container 43 Lower pressure vessel 44 Upper pressure vessel 45 Liquid inlet 46 Liquid outlet 47, 48 Stop valve 49 Rod-like projection 50 Lifting frame

Claims (1)

[Claims] 1. A double structure comprising a plurality of disposable unit containers containing a filter element and a pressure-resistant container containing the unit containers connected directly or via a connecting jig. A filtering device,
The pressure-resistant container is composed of an upper pressure-resistant container and a lower pressure-resistant container that can be connected to a line pipe, and each of the plurality of unit containers has a filter element with a different filtration accuracy and a liquid after filtration or before filtration as a unit. A bypass pipe is provided that allows the passage from the upper end surface to the lower end surface of the container as it is, and an opening portion of the bypass pipe having a stop valve is provided at the upper end surface and the lower end surface of the unit container and a liquid having a stop valve is provided. An inlet port or a liquid outlet port is provided, and the liquid inlet port or the liquid outlet port of the upper end surface of the unit container connected to the uppermost portion communicates with the bypass pipe opening portion of the upper end surface, and each of the stop valves is connected to the unit container The flow path is opened and the connection is released at the same time when the flow path is closed, and the flow path is closed at the same time. Disposable multistage filtration apparatus characterized by being configured to sequentially passed to a high filter element of filtration accuracy from the element and filtered.