JP3300597B2 - Liquid filter and filtration device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a filter,
In particular, it relates to a filter suitable for regenerating dirty cooking oil by use.

[0002]

2. Description of the Related Art Conventionally, a technique for regenerating contaminated edible oil using a sheet-like filter made of cellulose fiber and an adsorbent such as activated clay or activated carbon has been disclosed in Japanese Patent Application Laid-Open No. 56-16682.
0, JP-A-57-187012, JP-A-3-776
No. 15 publicly known. Edible oil is deodorized and decolored by an adsorbent in addition to the solid content being captured by the filter.

[0003]

The known filter is clogged with solids remaining on the filter, and the oil filtration rate is apt to be reduced. Further, the degree of deodorization and decolorization of oil depends on the contact time with the adsorbent, and it is difficult to obtain a sufficiently long contact time only by passing through one sheet filter. It is possible to lengthen the time by stacking a plurality of filters, but if the uppermost layer filter is clogged, the filtration speed will be reduced, and such a filtration method is not very efficient.

Accordingly, an object of the present invention is to provide a filter which can easily prolong the contact time with the adsorbent and is hardly clogged.

[0005]

[MEANS FOR SOLVING THE PROBLEMS]
One aspect of the invention comprises 20-80% by weight of cellulosic fibers, 20-80% by weight of activated clay, 0-4% by weight of a binder and 0-40% by weight of activated carbon, ~ 15
A long sheet-like filter element having a basis weight of 0 g / m ² and irregularities on the sheet surface has an apparent density of 0.20 to 0.20.
Wrapped around the core to 0.40 g / cm ³
Form a filter having a top and a bottom.
Both end faces are smooth and
Between the top and bottom of the wound filter element
Communication .

[0006] Another one of the present invention is that 20 to 80% by weight
Cellulose fiber, 20 to 80% by weight of activated clay,
４4% by weight binder and 0-40% by weight activated carbon.
Only, a basis weight of ^{20 to} 150 g / m ² and irregularities on the sheet surface.
Numerous sheet-shaped filter elements with a certain shape
Laminate and top and bottom parallel to each other
A part fixing plate and a bottom fixing plate are provided respectively,
The laminated filter element is apparently
Up and down to a density of 0.20 to 0.40 g / cm ³
From the direction to form a columnar laminated filter,
The filter has a smooth peripheral surface and
Through the filter element and the bottom fixing plate in the center of
A sheet passage through which the sheet-like filter element
The space between the stacks of the components communicates from the peripheral surface to the pipeline .

[0007] Still another aspect of the present invention is a liquid filler.
, A container body for storing the same, and closing the container body
And a filter device for filtering contaminated liquid
Thus, the liquid filter according to claim 1 or claim 2
One of the filters, wherein the container body is
A peripheral wall having an inlet for introducing the contaminated liquid, and filtered.
A bottom wall having a discharge port for discharging a liquid;
Has a central portion and a higher peripheral step portion, wherein the lid
Droops from its inner surface and abuts the top of the filter
The filter has a hanging portion for fixing the filter.
Is with a certain gap between the peripheral wall and
The peripheral step with a fixed gap between the bottom wall and the center
The bottom portion is placed on the portion, the hanging portion and the peripheral step portion
And fixed in the container body.
It is a filtration device characterized by the above-mentioned.

[0008] One of the preferred embodiments of the present invention is the above-mentioned.
The unevenness on the filter element sheet surface
Or embossing, and the other one is
Crepe rate or emboss in filter element
Rate is 5 to 20%, and another one is
Is placed in a bag of liquid-permeable mesh ground, and the bag is
Can be gripped 20mm or more above the top of the filter
It has a unique part.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the filter according to the present invention will be described below with reference to the accompanying drawings.

A filter 1 shown in a perspective view in FIG. 1 has a cylindrical core 2 and a long sheet-like filter element (filter paper).
3 wound, and low and fit the cap 4 to the upper end of the winding core 2
It is a columnar body formed in the shape of a circle. Filter 1, the
It has upper and lower end surfaces 6 and 7 forming a top and a bottom, and a peripheral surface 8,
Edges of the filter element 3 are trimmed so that both end surfaces 6 and 7 become smooth surfaces. The peripheral surface 8 has a distal end 9 of the filter element 3, which is optionally joined to the underlying filter element 3. The lower end of the winding core 2 is in the open state, it can be fitted a cap 4 also here necessary.

FIG. 2 is a sectional view of a filtration device P for filtering used edible oil and a filter 1 accommodated therein.
It is a partially broken side view of FIG. The filter 1 is housed in a cylindrical filtration container 11 after being put in a bag 10 made of plastic mesh. The container 11 includes a main body 12 and a lid 13, and during the filtering operation, the main body 12 and the lid 13 are kept in a sealed state by appropriate means (not shown). The main body 12 has an inlet 16 for edible oil on the peripheral wall 15 and an outlet 18 on the bottom wall 17. The bottom wall 17 has a central portion 19 and a peripheral step portion 20 higher than the central portion 19. Lid 1
On the inner surface of 3, there is a hanging portion 21, which can be pressed against the upper end surface 6 of the stored filter 1, whereby the lower end surface 7 of the filter 1 comes into close contact with the step portion 20 of the container 11. this
In this way, the filter 1 has its bottom portion at the peripheral step portion 20.
And stored in the main body 12. Peripheral step 20
Is higher than the central portion 19, and thus forms the bottom of the filter 1.
A fixed gap between the lower end surface 7 and the central portion 19 of the bottom wall 17
Is provided. Filter housed in this body 12
1 is fixed between the hanging portion 21 and the peripheral step portion 20.
I have.

The edible oil to be filtered enters through the inlet 16 and flows in the directions indicated by arrows A to F. In Filter 1,
The oil flows from the upper end face 6 toward the lower end face 7, and the filtered oil exits from the lower end face 7 through the outlet 18. The oil can penetrate the filter 1 from the peripheral surface, but since the filter element 3 overlaps many times, the amount of oil penetrating is negligible compared to the amount from the upper end surface 6.

The filter element 3 of the filter 1 constructed as described above has 20 to 80% by weight of cellulose fiber, 20 to 80% by weight of activated clay, and 0 to 80% for binding these fibers to activated clay. It contains 4% by weight of a resin binder and, if necessary, 0 to 40% by weight of activated carbon, has a basis weight of 20 to 150 g / m ² , and is either creped or embossed. Is given. The crepe or embossing is preferably performed at an application rate of 5 to 20%. When the filter element 3 is wound around the core 2, the apparent density of the filter elements 3 overlapping each other is 0.20 to 0.20.
The winding conditions are adjusted so as to be 0.40 g / cm ³ . The core 2 is made of a conventional paper tube or plastic pipe.
A core material is used, and a processed product such as plastic or metal is used for the cap 4.

The mechanism by which oil is filtered by the filter 1 is as follows.
It is considered as follows. Since the filter element 3 has irregularities on the sheet surface by either creping or embossing, a part that contacts each other and a part that separates are formed between the wound and overlapped filter elements 3. At this time, if the basis weight and the apparent density of the filter element 3 are the above conditions, the contacting part intermittently exists, the separating part has an appropriate separation distance, and the upper and lower end faces of the filter 1. An oil passage that bends in a complicated manner between 6 and 7 is formed. FIG. 3 is a schematic diagram of such a passage 100. Passage 100 is defined by overlapping filter elements 3A and 3B,
It has many bent portions 101 and straight portions 102. When the contaminated oil enters the passage 100 from the upper end surface 6 of the filter 1, the solid content 105 in the oil is caught by the upper end surface 6, and the bent portion 101 and the straight portion 102
Are trapped by attaching to At the bent portion 101, the inclination of the passage 100 is gentle and the flow of oil is slow, so that the trapped amount there is particularly large.

[0015] The path 100 that is bent in this way can be much longer than the length of the columnar filter 1.
Therefore, the dirty oil flowing through the passage 100 can come into contact with the activated clay or the activated carbon as the adsorbent contained in the filter element 3 for a long time, and the degree of deodorization and decolorization progresses according to the time. Will be.

In FIG. 2, the used filter 1 is
The top 10A of the bag 10 can be grasped and easily taken out of the container 11.

FIG. 4 is a diagram showing an embodiment of the present invention. As shown in FIG.
Each has a donut shape, and a large number of the donut shapes are stacked to form a columnar body to form a stacked filter 1.
You. The filter 1 has a peripheral surface 30 that is formed smoothly, and defines a duct 31 that extends vertically to the center.
As shown in (B), the columnar body has an apparent density of 0. 0 by a top fixing plate 32, a bottom fixing plate 33, and a rod-shaped or band-shaped fixing member 34 connecting these two plates 32, 33.
It is sandwiched so as to be 20 to 0.40 g / cm ³ . As shown in (C), which is a cross-sectional view taken along line CC of (B), a discharge port 35 having substantially the same diameter as the conduit 31 is provided at the center of the bottom fixing plate 33. When this filter 1 is used by being housed in a container 11 similar to that shown in FIG.
The filter element 3 penetrates between the filter elements 3 from the edge of the filter element 3, is filtered by a mechanism similar to that shown in FIG. 3, advances to the conduit 31, and exits the container 11 through the discharge port 35. In this filter 1, the shape of the filter element 3 can be any suitable shape such as a rectangle or a square, in addition to a donut shape.

In the filter 1 according to the present invention, the overlapping filter elements 3 have an apparent density of 0.20.
If it is smaller than g / cm ³ , the separation dimension between the filter elements 3 becomes too large, so that expansion and contraction due to a change in humidity during storage of the filter 1 easily occurs, and deformation of the filter element 3 due to oil pressure easily occurs. Or
Therefore, it is difficult for the filter 1 to maintain a required shape. On the other hand, when the apparent density is larger than 0.40 g / cm ³ , the distance between the filter elements 3 becomes too small. Thus, in the case of the filter 1 shown in FIG. 1, most of the solid content in the oil is captured by the upper end face 6 and closes the upper end face 6, so that the filtration speed tends to decrease. Further, since the oil must be flown under high pressure, the pressure often damages the filter element 3.

The cellulose fiber used for the filter element 3 is preferably wood pulp. In order to reinforce the fibers, synthetic fibers can be mixed up to 10% by weight of the filter element 3.

The amount of activated clay in the filter element 3 is 2
If the amount is less than 0% by weight, in order to ensure a sufficient contact time between the oil and the activated clay, for example, in the case of the filter 1 of FIG. Thereby, the filter container 11 becomes unnecessarily large. On the other hand, when the amount of activated clay is more than 80% by weight, the strength of the filter element 3 is significantly reduced, and it is difficult to maintain the form as paper. The activated clay and activated carbon preferably have a particle size of 85% or more when passed through a 200 mesh, thereby facilitating the paper making of the filter element 3 and the adsorption efficiency when compared with the amount of adsorbent used. Will be higher.

The basis weight of the filter element 3 is 20 g / m
^{If it is} smaller than ² , the filter element 3 is too thin to maintain the strength as a sheet. Also, the basis weight is 1
If it is larger than 50 g / m ² , the filter element 3 becomes too thick, and the amount of adsorption on the surface of the sheet reaches saturation even though the central part of the sheet has an adsorption force, and the filter 1 is replaced. Is required.

The resin binder binds the activated clay or activated carbon to the cellulose fiber, facilitates the papermaking of the filter element 3 containing a required amount of adsorbent, and prevents the adsorbent from falling off from the filter element 3. For prevention, a cationic or anionic polymer flocculant can be used.

When the filter 1 is placed in the mesh bag 10, the holding portion 1 having a length of 20 mm or more is placed at the top of the bag 10.
If there is 0A, it becomes easy to put the filter 1 in and out of the container 11. In addition, when a plastic net is used as the mesh ground, it is possible to obtain the bag 10 which has elasticity and easily fits on the peripheral surface of the filter 1.

The filter 1 configured as described above can be used for filtering industrial oil and other liquids in addition to edible oil.

A specific example for manufacturing the filter element 3 and the filter 1 is as follows. A mixture of 100 parts by weight of pulp and 200 parts by weight of powdered activated clay (Activated clay SA-35 manufactured by Japan Active Shirato Co., Ltd.)
After dispersing in water to a concentration of about 2% by weight, 2 parts by weight of "Filex RC-104 (manufactured by Meisei Chemical Industry Co., Ltd.)" as a cationic coagulant and "Pyrex as an anionic coagulant. M (manufactured by the company) ", 1.7 parts by weight, and then stirred. This mixture was diluted with a large amount of water, paper-made with a conventional paper machine and creped, and the crepe rate was 15%, the basis weight was 50 g / m ² , and the thickness was 0.27 mm.
Was obtained. The activated clay content of this filter element by the ignition loss method was 63.4% by weight.
Met.

Next, this filter element is set to a width 160
A roll having a diameter of 115 mm and a weight of 505 g (including a weight of 90 g of paper tube) is wound on a paper tube having a diameter of 56 mm and a length of 56 m with a uniform force, and a nylon resin cap is fitted to one end of the paper tube. Thus, Filter 1 was obtained. This filter 1 has a length of 370 made of a commercially available plastic net.
The filter 1 was placed in an orange bag 10 mm, and a holding portion 10A having a length of about 55 mm was formed above the top of the filter 1.

[0027]

The filter according to the present invention contains cellulose fibers and an adsorbent, and the filter element having a sheet surface having irregularities formed by creping or embossing is superposed. A filtration area can be obtained. Thus, the filter does not easily clog, and can effectively capture the solid content of the edible edible oil. Further, in this filter, the oil can be brought into contact with the adsorbent for a long time, so that deodorization and decolorization are ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter.

FIG. 2 is a sectional view of a filtration device and a partially cutaway side view of a filter housed therein.

FIG. 3 is a schematic partial enlarged sectional view of a filter.

FIG. 4 is a diagram illustrating one embodiment of a filter,
(A) is a perspective view of a state where the filter element is stacked,
(B) is a perspective view of a filter, (C) is a cross-sectional view taken along line CC of (B).

[Explanation of symbols]

 1 Filter 2Core  3Filter element  6Top surface (top)  7Lower end (bottom) 10 bags 12 body (container body) 13 Lid (lid) 15 Perimeter wall 16 Introduction mouth17 Bottom wall 18 outlet 20 Peripheral step 21 hanging part  30Peripheral surface 31 pipeline 32 Top fixing plate 33 Bottom fixing plate P filtration device

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsuomi Suzuki 4-13-17 Oi, Shinagawa-ku, Tokyo Ihara High-Pressure Fittings Industry Co., Ltd. (56) References JP-A-6-63322 (JP, A) JP-A-56-166820 (JP, A) JP-A-57-187012 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 39/00-39/20

Claims (6)

(57) [Claims] 1. A cellulose fiber comprising 20 to 80% by weight,
20 to 150 g containing 0 to 80% by weight of activated clay, 0 to 4% by weight of a binder and 0 to 40% by weight of activated carbon
/ M ² , and a long sheet-like filter element having an unevenness on the sheet surface has an apparent density of 0.20-0.
Rolled around the core to 40 g / cm ³
Forming a filter, the filter having a top and a bottom
Both ends are smooth and the sheet
From the top to the bottom between the wound layers of the filter element
A liquid filter that is in communication. 2. Cellulose fibers of 20 to 80% by weight,
0 to 80% by weight activated clay and 0 to 4% by weight binder
And 0 to 40% by weight of activated carbon, and 20 to 150 g
/ M ² and a uniform shape having irregularities on the sheet surface.
While laminating many sheet-like filter elements,
Top fixing plate and bottom fixing parallel to each other at its top and bottom
Plates, respectively, and the lamination is performed via these fixing plates.
Filter element has an apparent density of 0.20
0.40 g / cm ³ from above and below
To form a columnar laminated filter, the filter comprising
The peripheral surface is smooth and the center is
Has a pipeline that passes through the filter element and the bottom fixing plate.
And between the lamination of the sheet-like filter elements
A liquid that communicates from the peripheral surface to the pipe
Filter. 3. The liquid filter according to claim 1, wherein the unevenness on the sheet surface of the filter element is either crepe or emboss. 4. A third aspect of the crepe ratio or embossing rate of 5-20% in the filter element
Liquid filter. 5. The filter according to claim 1, wherein the filter is contained in a bag made of liquid-permeable mesh, and the bag has a grippable portion having a length of at least 20 mm above the top of the filter. ~
5. The liquid filter according to any one of 4. 6.Liquid filter and container for storing it
Having a body and a lid for closing the container body,
In a filtration device that filters, The liquid filter according to any one of claims 1 and 2,
One or the other, The container body has an inlet for introducing the contaminated liquid.
Peripheral wall and a bottom wall with an outlet for discharging the filtered liquid
And The bottom wall has a central portion and a higher peripheral step portion, The lid hangs down from its inner surface and the top of the filter
Has a hanging part that abuts the filter to fix the filter, The filter has a certain gap between the filter and the peripheral wall.
With a certain gap between the bottom wall and the center
The bottom is placed on the peripheral step, and the hanging portion and the front
It is fixed between the peripheral edge step and stored in the container body.
A filtration device characterized by being filtered.