JPS5911324B2 - Oil/water separation filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter for separating water and an organic liquid from a mixture of water and a water-insoluble organic liquid (oil/water).

Conventionally, filters for oil/water separation have been made using lipophilic synthetic fibers alone or in combination with lipophilic synthetic fibers and hydrophilic natural fibers, but although these filters have good separation performance, the fibers are soft and stiff. Because of this, if highly viscous oil or suspended solids were included in the oil/water, the fibers would stick together and become clogged.

To improve this problem, there are filters in which lipophilic or hydrophilic synthetic fibers or resins are bonded or fused together, but the aperture ratio is small and the oil becomes coarse during oil-water separation. Since the surface area of the active part is small, it has the disadvantage of requiring a large volume compared to the amount of constant oil and water treated.

JP-A No. 51-126563 describes a combination of a metal wire sheath material and a hydrophilic synthetic fiber sheath material, and a combination of a metal wire sheath material and a lipophilic synthetic fiber P material and a hydrophilic synthetic fiber F material, and the above-mentioned Although these drawbacks have been eliminated, there is a tendency for clogging to occur if high viscosity oil adheres to lipophilic synthetic fiber lumber, and in JP-A-56-73508, stainless steel treated with thermoplastic fluororesin An oil/water separation filter composed of steel fibers or glass fibers has been described, but although this invention prevents clogging, it does not use hydrophilic fibers in combination, so depending on the type of oil, the particles may be coarsened. Water remains in the oil droplets, and separation of oil and water due to the difference in specific gravity tends to be incomplete.

The present application improves the above-mentioned drawbacks, and the first invention is to provide a reinforcing structure 1 having a large number of holes, as shown in FIG. 3
are placed at intervals of 15 mm or more, preferably between 20 and 50 mm, and between them are corrosion-resistant and rigid oleophilic (for example, metal) fibers with a fiber diameter of 0.01 to 0.15 mm,
Preferably, 0.01 to 0.08 mm of material is evenly filled to form the lipophilic fiber layer 2, and further a 10 to 30 mesh net made of hydrophilic fibers is placed on the outside of the reinforcing structure 3.
At least 3 layers, preferably 3 to 8 layers, are stacked to form a hydrophilic fiber network layer 5.
A 3 to 3 o mesh net or knitted fabric made of hydrophilic natural or synthetic fibers is layered on the outside to form an oil cutter 6, and the shape is flat or cylindrical, etc., and the periphery thereof is bonded. This is an oil/water separation filter which is sealed and the water flow direction is from the reinforcing structure 1 to the oil drain 6.

This filter is installed in the oil-water separator so that the filter surface is at an angle ranging from horizontal to vertical, and the oil-water containing fine oil particles is forced to pass from the reinforcing structure 1 to the oil drain 6. When tightened, the oil particles are captured by the lipophilic fibers of the lipophilic fiber layer 2, aggregated and aggregated, and the coarse oil particles are pushed out by the water flow and pass through the reinforcing structure 3 to the next hydrophilic layer. The oil droplets grow in that space while being dehydrated by the hydrophilic fibers of the hydrophilic fiber network layer 5, and the grown oil droplets are cut by the hydrophilic fiber network or knitted fabric of the oil cutter 6, which is the outermost layer, and are released into the separated water. It floats to the top of the oil-water separator and is separated without adhering to the outer surface of the filter.

In the present invention, by using only rigid fibers as lipophilic fibers, even when highly viscous oil is captured and aggregated, the fibers do not adhere to each other and clogging does not occur.
In addition, by providing a multilayer space (hydrophilic fiber network layer 5) of hydrophilic fiber networks between the lipophilic fiber layer 2, which is the lipophilic thick layer, and the oil cutter 6, which is made of hydrophilic fibers, 1977-
126563, in which a hydrophilic fiber network is simply layered on the outside of a lipophilic metal fiber layer, and in JP-A No. 56
-735 No. 08, oil droplets coarsened in the lipophilic fiber layer 2 are made of hydrophilic fibers, compared to filters made only of lipophilic fibers such as fluorine-treated stainless steel fibers or glass fibers. In the space of the network layer 5, the hydrophilic fibers further bond with each other and grow to become large oil droplets. At the same time, the hydrophilic fibers remove the water caught up in the oil droplets, so the specific gravity of the coarse oil droplets and water decreases. The difference becomes larger and the separation effect is improved, and since the outermost layer of the oil drain 6 is made of a hydrophilic fiber net or knitted fabric, even high viscosity oil droplets do not adhere to the oil drain 6. No clogging of the outermost layer occurs.

As seen in FIG. 4, the second invention of the present application further comprises a corrosion-resistant metal of 30 to 300 mesh between the reinforcing structure 3 and the hydrophilic fiber network layer 5 in the first invention. A wire mesh 4 is interposed therebetween.

This makes it suitable for oil-water separation of oil-water containing finer oil than the oil-water applied in the first invention.

In other words, after the oily water that has entered from the reinforcing structure 1 passes through the lipophilic fiber layer 2 and undergoes the oil capture and aggregation process, the fine oil particles that remain without being collected are also absorbed by the wire mesh 4. It is captured during passing and grows in the next hydrophilic fiber network layer 5,
The oil droplets become sufficiently large and separate from the outermost oil pan 6, float to the top of the separator, and are separated.

The oil/water separation filter of the present invention is a flat plate whose periphery is sealed with a frame 9 as shown in FIGS. 3 and 6, or a reinforcing structure 1.
with the oil drainer 6 on the inside and the rubber gasket 8 on both ends.
It can be used in various shapes depending on the shape of the oil/water separator, such as a cylindrical one sealed with a plate-shaped metal plate 7 having an opening in the center as shown in FIGS. 2 and 5.

Note that the direction in which the oil water passes through the filter in the oil-water separator is preferably in a range from a horizontal direction to a vertical direction.

The reinforcing structures 1 and 3 used in the present invention are corrosion-resistant metal plates with a large number of water holes or iron plates subjected to corrosion-resistant treatment.
These are fiberboards, plastic plates, etc. that have been treated to be water-resistant.

Corrosion-resistant and rigid lipophilic fibers forming the lipophilic fiber layer 2 used in the present invention are metal fibers such as steel, stainless steel, plas, bronze, etc. that have been subjected to anti-corrosion treatment and have a diameter of 0.01 to Q, Q8 mm. Corrosion-resistant wire mesh 4 used in the present invention is made of anticorrosion-treated steel, stainless steel, or untreated or resin-treated glass fiber, carbon fiber, or resin-treated natural fiber with a diameter of 0.02 to 0.15 mF. It is a wire mesh of 30 to 300 mesh using metal wires such as steel, frass, and bronze.

The hydrophilic fiber network of the hydrophilic fiber network layer 5 used in the present invention is:
It is a 10-30 mesh net made of polyvinyl alcohol fibers, acetylated cellulose fibers, and hydrophilic acrylic fibers.

The hydrophilic natural or synthetic fiber net or knitted fabric used as the outermost layer 6 of the present invention is made of alkali-treated (marcerized) cotton and linen, strong human silk, acetylated cellulose fiber, polyvinyl alcohol. It is a 3-30 mesh net or knitted fabric made of hydrophilic acrylic fiber.

Hereinafter, the present invention will be explained in detail with reference to Examples.

Example 1 Diameter 145 mm, height 3 with many water holes of 3 to 8 dragon diameters
A reinforcing outer cylinder that is a reinforcing structure 3 with a diameter of 90 mm and a diameter of 90 mm.
Bronze wool with a thickness of 0.05 mm is evenly filled between the reinforcing inner cylinder, which is the reinforcing structure 1 of 1 ft m 1 height 370 mm, at a filling pressure of 5 to 6 kg/cvi. After wrapping 5 layers of 16 mesh vinylon fiber network on the outside and covering the outermost layer with one layer of circular knitted marcerized cotton, we wrapped both ends of the cylinder into a dish-shaped metal plate with an opening in the center (with oil-resistant rubber gasket). ) to obtain a hollow cylindrical filter with an outer diameter of about 150 mm, an inner diameter of about 90 mm, and a height of 370 mm.

This filter has an inner diameter of 250mm and a height of 700TItr.
Installed in the oil-water separator of the IL, the oil-water separator was uniformly mixed with 25 parts of C heavy oil (viscosity: 37.8°C, 960 seconds on Redwood A1 viscometer) at a rate of 38 liters per minute. Oil and water were separated under 30 partial pressure.

The amount of separated oil obtained after 10 minutes, 20 minutes, and 30 minutes of separation was all 95 times or more of the amount of inflow oil, and the water content in the separated oil was 1.5%.

Example 2 Diameter 1 4 with many water holes of 3 to 81 ItrIL diameter
0.0 between the reinforcing outer cylinder with a diameter of 85 m and a height of 370 mm and a height of 3701 IL m.
Fill the stainless steel wool with a pressure of 3 to 4.
Fill it uniformly with Yu/d, layer one layer of 300 mesh stainless steel mesh on the outside of the reinforcing outer cylinder, layer three layers of 16 mesh acetate fiber mesh on the outside, and layer 25 mesh strong steel as the outermost layer. After overlapping nine layers of silk fiber stockinette, both ends of the cylinder were made into a dish-shaped metal plate (with an opening in the center).
(with oil-resistant rubber gasket) with adhesive, and has an outer diameter of approx. 1
A hollow cylindrical filter with a diameter of 50 mm, an inner diameter of 85 mm, and a height of 370 mm was obtained.

This filter was installed in an oil-water separator similar to that in Example 1, and the same oil-water and light oil (with a viscosity of 3
5 seconds on a Redwood A1 viscometer at 7.8°C).
The oil and water mixed uniformly in Section 5 were separated by pressure for 30 minutes at a rate of 38 liters per minute.

The amount of separated oil obtained after 10 minutes, 20 minutes, and 30 minutes of separation of both oil and water was 96 times or more of the amount of inflow oil, and the water content in the separated oil was 1.3 times.

Example 3 The size is 220 m with many water holes with a diameter of 3 to 81 IL m
Between the two reinforcing flat plates serving as reinforcing structures 1 and 3 of m x 370 mm, a carbonic acid formalin resin-treated
．． 50mm of glass wool with a thickness of 0.05~0.06mm
Fill it evenly to a thickness of 20 mm on the outside of one reinforcement plate.
Six layers of mesh acetate fiber nets were stacked, and one layer of vinylon fiber net was placed on top of them as the outermost layer, and the four sides were tightened in a frame to obtain a flat filter with a thickness of about 25 mm.

This filter was installed in the same oil-water separator as in Example 1, and oil-water separation was performed under the same conditions as in Example 1.

The amounts of separated oil obtained after 10 minutes, 20 minutes, and 30 minutes of separation were all 90 times or more of the amount of inflow oil, and the water content in the separated oil was 1.5 times.

[Brief explanation of the drawing]

1, 2, and 3 are explanatory diagrams showing the structure of the first invention, a partially cutaway view of a filter configured in a cylindrical shape, a partially cutaway view of a filter configured in a flat plate shape, and FIG. 4, 5, and 6 are explanatory diagrams showing the configuration of the second invention, a partially cutaway view of a cylindrical filter, and a partially cutaway view of a flat filter. In the figures, the arrows in Figures 1 and 4 indicate the direction of water flow. DESCRIPTION OF SYMBOLS 1... Reinforcing composition, 2... Lipophilic fiber layer, 3... Reinforcing composition, 4... Wire mesh, 5... ... Hydrophilic fiber network layer, 6 ... Oil drainer, 7 ... Dish-shaped metal plate, 8 ... Rubber packing, 9 ... Frame, 10 ······filter.

Claims (1)

[Claims] 1 b. 1 reinforcing structure with multiple holes. The diameter is 0.01-0.15 placed on it with a thickness of 15 dragons or more
Lipophilic fibrous layer 2 consisting of rigid fibers with corrosion resistance of mm No. Reinforcing structure 3 with a large number of holes placed thereon 2. A hydrophilic fiber network layer 5 of 10 to 30 mesh with two or more layers stacked thereon. Furthermore, the oil-water separation filter has an oil drainer 6 made of a hydrophilic natural or synthetic fiber net or knitted fabric that covers the oil drainer, and the water flow direction is from the reinforcing structure 1 to the oil drainer 6. 2. The oil water according to claim 1, which has a cylindrical structure in which the reinforcing component 1 is on the inside and the oil pan 6 is on the outside, in a structure in which the water flow direction is the direction of the reinforcing component 1 or the oil pan 6. Separation filter. 3 a. 1 reinforcing structure with multiple holes. The diameter is 0.01~0.15 placed on it with a thickness of 15 mm or more.
Lipophilic fiber layer 2 made of im corrosion resistant and rigid fibers c. Reinforcing structure 3 with a number of holes placed thereon 2. A corrosion-resistant wire mesh of 30 to 300 mesh placed on top 4 E. A hydrophilic fiber network layer 5 of 10 to 30 mesh made up of two or more layers on top of that, and an oil cutter 6 made of a hydrophilic natural or synthetic fiber network or knitted fabric covering the layer 5, which is reinforced in the direction of water flow. A filter for oil/water separation having a structure in which the component 1 is oriented in the direction of the oil drain 6. 4. The oil water according to claim 3, which has a cylindrical structure in which the water flow direction is from the reinforcing structure 1 to the oil cutter 6, and the reinforcing structure 1 is on the inside and the oil cutter 6 is on the outside. Separation filter.