TW200536596A - Oil-water separator - Google Patents

Abstract

When the oil component in water to be treated is passed for separation through two stages, a coarse-graining element (9) in a front stage separation chamber (4) and a coarse-graining element (16) in a rear stage separation chamber (5), occurrence of clogging in the coarse-graining element (16) in the rear stage separation chamber (5) is avoided to improve the rate of separation of oil component. The water to be treated moving from the front stage separation chamber (4) to the rear stage separation chamber (5) is filtered by a filter element in a filter (20), whereby the solid particle component contained in the water to be treated is separated.

Description

200536596 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to the treatment of water such as bottom water (bi 1 gewater), wastewater, etc. in a ship. When this oil is mixed with oil, the treated water can be separated into Oil-water separation device for oil and water. [Prior art]

In Patent Document 1 of the prior art, a method is proposed in which treated water containing oil is first introduced into a front-stage separation chamber. Here, a coarse-grained element (e 1 ement) that is relatively thick through a sieve opening is used. A function material that can condense extremely fine oil droplets to each other to make them coarser at the hole), to make the oil droplets coarse and float to separate, and secondly, to process the water from the preceding stage separation chamber into the latter stage separation chamber, here At the same time, the coarser granulating element is finer than the sieve opening of the coarse granulating element in the preceding stage separation chamber, so that the oil droplets are coarsened and floated to separate. The oil component in the water to be treated can be separated with a high separation rate. (Patent Document 1) Japanese Patent Laid-Open Publication No. 8-3 0 9 1 0 2 [Summary of the Invention] (Problems to be Solved by the Invention) However, in this prior art, the rear separation chambers of the above-mentioned separation chambers are made. When the coarse-grained element has a finer sieve, although the oil separation rate can be increased, the treated water contains solid particles in addition to the oil. Therefore, the solid particles will block the above-mentioned Coarse granulation element with finer sieve. That is, in order to increase the separation rate of the oil content and make the sieve openings of the coarse-grained elements in the latter stage finer, there are coarse-grained elements in this latter stage 312XP / Invention Specification (Supplement) / 94-06 / 94] 07277 200536596 The problem is that the sieve openings are blocked by solid particles contained in the treated water. In this case, the clogging of the solid particles contained in the water to be treated can be eliminated by filtering the water to be treated with a filter element in advance to separate and remove the solid particles. However, the water to be treated is filtered in advance At this time, a large amount of oil contained in the treated water will quickly block the filter element, or abnormally increase the filtration resistance, and significantly obstruct the filtering treatment of the treated water.

The present invention has as its technical problem to provide an oil-water separation device which can eliminate such problems. (Means for Solving the Problem) In order to achieve this technical problem, the first item of the scope of patent application of the present invention is provided with a pre-separation chamber formed by a coarse-grained element having a relatively large sieve opening; and The post-stage separation chamber made of coarse-grained elements that are finer than the sieve openings of the coarse-grained elements in the preceding-stage separation chamber; the treated water is supplied to the preceding-stage separation chamber, and secondly, the The treated water is sent to the above-mentioned separation chamber. The oil-water separation device thus formed is characterized in that it is provided with a solid shape capable of separating the treated water contained in the front-stage separation chamber and filtered from the above-mentioned separation chamber by a filter element. Filter for particle composition. In addition, the second item of the scope of patent application of the present invention is a front section in which a partition is divided into an upper part in a closed container of vertical type 6 312XP / Invention Specification (Supplement) / 94-06 / 94107277

200536596 Separation chamber and lower rear stage separation chamber. In the aforementioned front stage separation chamber, coarse-grained elements with relatively large sieve openings are provided, and the treated water supplied from the supply port above the front stage separation chamber is separated through the preceding stage. The coarse-grained element in the chamber is discharged from a discharge port provided below it. In this way, on the one hand, a coarser-grained element with a finer mesh than the coarse-grained element of the preceding-stage separation chamber is provided in the rear-stage separation chamber. The component, the treated water flowing in from the upper inlet of the rear compartment, passes through the coarsely granulated component in the rear compartment, and is discharged from a discharge outlet provided below it. In this way, further, in addition to the aforementioned closed container, A filter capable of separating solid particles contained in the water to be treated, which is filtered by a filter element from an outlet of the preceding stage separation chamber to an inlet of the latter stage separation chamber. (Effects of the Invention) According to the invention of the first scope of the above-mentioned patent application, the treated water containing oil and solid particles is firstly supplied to the front separation chamber, and the coarse-grained element built in the front separation chamber is used. The oil droplets in the treated water will agglomerate and coarsen with each other, and will float up and separate in the upper part of the former separation. In this way, the treated water that has been separated from the oil in the preceding separation chamber reaches the filter from the preceding separation chamber, where the solid particles contained in the treated water are separated and removed by filtering by the filter element. Secondly, the treated water flows from the filter into the rear stage separation chamber and passes through coarse coarse granulating elements with fine sieve holes built in the rear stage separation chamber. The fine oil droplets in the treated water will agglomerate and become coarse, and float, Divided into the upper part of the separation chamber at the rear. 312XP / Invention Manual (Supplement) / 94-06 / 94107277 Partially dissociated and disengaged chambers are separated by 7 200536596 In this case; fine coarse granulation through the sieve opening of the rear separation chamber f One piece of the treated water is separated in advance by the annihilation device to remove the solid particle component, and the coarse-grained element with a fine sieve opening can surely suppress the blockage of the solid particle component. On the other hand, the treated water that was filtered by the filter and the element that had been in tears has a low oil content concentration due to the removal of oil in the preceding separation chamber, so it can definitely reduce the filter. The filter element is blocked due to oil content and passed due to oil content; consider the situation of increased resistance.

However, the above-mentioned filter only separates solid particles in the water to be treated. Although the oil is not separated, as described in detail in the embodiment, the above-mentioned filter is installed between the front-stage separation chamber and the rear-stage separation chamber based on experiments. In the case of a filter, the overall oil separation rate can be improved compared to when the filter is not provided. In addition, according to the structure of the second patent application range, the front separation chamber and the rear separation chamber can be integrated as a vertical closed-capacity φ device, so it is more separate than the front separation chamber and the rear separation. In the case of a room, the floor area can be significantly reduced in size, weight, and installation space. In this case, since the filter and the closed container are constituted separately, it is easy to exchange the filter element in the filter. In addition, if the invention in the third item of the patent application is applied, the filter element in the aforementioned filter may be a filter element that is equal to the sieve opening of the coarse-grained element in the above-mentioned separation chamber, or may be thicker than that in the above-mentioned separation chamber. A filtering element with a smaller sieve opening of the granulating element can more surely achieve the blockage of the coarse-grained dagger element in the above-mentioned separation chamber. 8 312XP / Inventory (Supplement) / 94-06 / 94107277

200536596 In addition, the coarse-grained element has two types, a so-called hydrophilic material having a strong interaction with water and a so-called hydrophilic material having a strong interaction with oil. For example, if the invention of item 4 of the patent scope is applied, if the coarse-grained element in the latter stage is made into a hydrophilic material, it will agglomerate and become coarse oil droplets when passing through this coarse-grained piece, and it will not adhere to it Coarse-grained components can be quickly separated and floated and separated, and the separation rate of oil content can be more. In addition, if the invention in the fifth item of the patent application is applied, if the aforementioned filtering element becomes a hydrophilic material, then the element can be filtered here to reduce the blockage caused by the oil content. [Embodiment] An embodiment of the present invention will be described below with reference to the drawings of Figs. 1 and 2. In Fig. 1, reference numeral 1 denotes a hermetically sealed container formed by a vertical cylinder standing from the bottom surface 2. The inside of this closed container 1 is divided into a front stage separation chamber 4 and a lower stage separation chamber 5 which are divided by a partition plate 3. A supply 6 capable of introducing the treated water containing oil fractal particle components into the front-stage separation chamber 4 is provided at the upper part of the front-stage separation chamber 4, and the supply port 6 is viewed from the axial direction of the closed container 1 It is arranged in the tangential direction to form the pre-treatment separation chamber 4 introduced from the supply port 6 from here, and can be rotated around the axis of the aforementioned sealed container 1. Moreover, in the aforementioned front separation chamber 4 is lower than the aforementioned supply port 6 312XP / Invention Manual (Supplement) / 94-06 / 94107277 in the lipophilic chamber used in the water-improving unit of 4 daggers to more accurately constitute the upper and solid parts At the time of the mouth, the water is surrounded by the part 9 200536596, and a metal mesh layer 7 is provided. At a position lower than this metal mesh layer 7, a support plate 8 having a through hole in the center is provided. A cylindrical coarse-grained element 9 is provided under the support plate 8 so that the water to be treated flowing down into the preceding-stage separation chamber 4 passes through the coarse-grained element 9 from the inside to the outside. The coarse-grained element 9 in the preceding separation chamber 4 is composed of so-called hydrophilic fibers having a strong interaction with water.

Further, at the bottom of the front separation chamber 4, the bottom of the separation plate 3, that is, the outlet of treated water 10 is provided, and at the same time, the top plate 11 of the front separation chamber 4 is provided. The oil extraction port 12 on the lower side and the oil extraction port 13 on the lower side of the support plate 8 are opened. On the one hand, at the bottom of the separation chamber 5 at the rear stage, that is, at the lower side of the partition plate 3, the treated water from the discharge port 10 in the separation chamber 4 at the front stage is provided to be introduced into The inflow port 14 in the rear separation chamber 5 is further lower than the inflow port 14 in the rear separation chamber 5, and a support plate 15 having a through hole in the center is provided. Here, the support plate 1 is provided. Underneath 5, there is a cylindrical coarse-grained element 16, and the treated water flowing down to the above-mentioned post-stage separation chamber 5 passes from the inside to the outside through the aforementioned coarse-grained element 16. This post-stage separation chamber The coarse-grained element 16 in 5 is also composed of so-called hydrophilic fibers having a strong interaction with water, similarly to the coarse-grained element 9 in the preceding-stage separation chamber 4 described above. Further, at the bottom of the above-mentioned separation chamber 5, 10 3 of the treated water is provided at the bottom] 2XP / Invention Manual (Supplement) / 94-06 / 94107277 200536596 The discharge port 17 is provided, and at the same time, an opening is provided in the aforementioned partition. The oil extraction port 18 on the lower side of the plate 3 and the oil extraction port 19 opened on the lower side of the aforementioned support plate 15. In this case, although the coarse-grained element 9 ′ in the preceding-stage separation chamber 4 has a sieve 孑 L of, for example, a relatively coarse sieve 孑 L of 50 μm (micr ο η), The sieve openings of the granulating element 16 are, for example, very fine sieve openings of 2 microns. In addition, each of the aforementioned oil extraction ports 1 2, 1 3, 18, 19 is provided with on-off valves 12a, 13a, 18a, 19a.

Further, a filter 20 is provided between the discharge port 10 of the preceding stage separation chamber 4 and the inflow port 14 of the latter stage separation chamber 5 to filter and separate solid particles contained in the water to be treated. FIG. 2 shows the structure of the filter 20. That is, the filter 20 is a body 20 c having a water inlet 20a connected to the above-mentioned discharge port 10 and a water outlet 20b connected to the above-mentioned inflow port 14; and the bolt 20d can be detachably mounted. A circular φ cylindrical filter element 2 e attached to this body 2 0 c; and a cover case 2 0 which is detachably sealed to the entire body 20 c of the filter element 20 e f; constructed in such a way that the treated water from the aforementioned water inlet 20a passes through the filter element 20e from the inside to the outside and then flows out from the water outlet 20b. In this case, the filter element 20e in the aforementioned filter 20 is made of so-called hydrophilic fibers having a strong interaction with water, as in the two coarse-grained elements 9, 16 described above, and this The sieve hole of the filter element 20 e in the filter 20 is, for example, assuming that the coarse granulation element 11 312XP / Invention Specification (Supplement) / 94-06 / 94 of the above-mentioned post-separation chamber 5 is 07277 200536596. When the pores are 2 micrometers, the structure is 1 to 2 micrometers, and the sieve pores are the same as or smaller than the sieve pores of the coarse-grained element 16 of the post-stage separation chamber 5 described above. In this configuration, to-be-treated water containing oil and solid particle components is first supplied to the tangential direction from the supply port 6 in the front-stage separation chamber 4, and by rotating in the front-stage separation chamber 4, the larger A part of the oil droplets floats toward the top in the front separation chamber 4 and separates. Secondly, when passing through the metal mesh layer 7 built in the foregoing separation chamber 4 above, a part of the oil droplets will condense with each other and coarsen into a large oil droplet.

It floats toward the top of the front separation chamber 4 and separates. Secondly, by passing through the coarse-grained element 9 built in the above-mentioned separation chamber 4, the oil droplets in the treated water are aggregated and coarsened with each other, and secondly, the hydrophilic fibers do not adhere to the coarse-grained element. 9 will quickly separate, and float toward the top of the front separation chamber 4 and below the support plate 8 to separate. In this way, the treated water in which the oil component is separated in the previous-stage separation chamber 4 reaches the filter 20 from the discharge port 10 at the bottom of the previous-stage separation chamber 4, and in this filter φ filter 20, the filter element 20 is borrowed. c Filtration separates and removes solid particle components contained in the water to be treated. In this case, since the filter element 20 c in the filter 20 is a hydrophilic fiber, it is possible to surely reduce the adhesion of the filter element 20 c to the clogging. Next, the treated water flowing out of the aforementioned filter 20 flows into the rear separation chamber 5 from the inflow inlet 14 and is processed by passing through coarse coarse granulation elements 16 having fine sieve openings in the separation chamber 5 in the subsequent stage. The fine oil droplets in the water are agglomerated with each other and become thicker. Secondly, the hydrophilic fibers will not adhere to the coarse particles. 12 312XP / Invention Manual (Supplement) / 94-06 / 94] 07277 200536596 Chemical element 16 and It will quickly separate and float toward the top in the rear separation chamber 5 and below the support plate 15 to separate. In addition, the water to be treated which has been separated and the oil concentration becomes low is discharged from the outlet 17 at the bottom of the rear separation chamber 5. On the other hand, it floats to the top of the front separation chamber 4 and below the support plate 8. When the oil content on the top of the rear separation chamber 5 and below the support plate 15 is accumulated to an appropriate amount, the on-off valve 12a of each oil extraction outlet 1 2, 1 3, 18, 19 can be opened by 13a, 18a, 19a and discharged to the outside.

When using the apparatus configured according to the foregoing configuration, when the to-be-separated water having a concentration of about 2 400 to 3 400 ppm is supplied to the first-stage separation chamber 4, the to-be-treated water discharged from the later-stage separation chamber 5 can be treated. The oil concentration was reduced to 7 to 9 ppm. However, in the aforementioned experiment, the treated water discharged from the outlet 10 of the previous-stage separation chamber 4 was introduced into the inlet 14 as it was without filtering. When the inside of the rear-stage separation chamber 5 is inside, the oil concentration of the treated water discharged from the outlet 17 of the rear-stage separation chamber 5 can only be reduced to about 30 ppm. From this, it can be seen that although the aforementioned filter 20 only separates solid particles in the water to be treated, but does not separate the oil, the use of this tear filter 20 can further reduce the concentration of oil in the water to be treated. In addition, as described above, each of the coarse-grained elements 9, 16 and the filter element 20c is not limited to those having a hydrophilic fiber, and may be formed by hydrophilizing a water-repellent fiber, or It is also possible to have numerous micro holes in the flexible film. 13 312XP / Invention Specification (Supplement) / 94-06 / 94] 07277 200536596 [Brief Description of the Drawings] FIG. 1 shows a vertical sectional front view of this embodiment. Front Figure 2 is an enlarged vertical view of the filter used in the above embodiment.

Figure 〇 [Description of Symbols of Main Components] 1 Airtight container 2 Bottom surface 3 Sub-partition 4 Front-stage separation chamber 5 Rear-stage separation chamber 6 Supply port for treated water 7 Metal mesh layer 8, 1 5 Support plate 9 Coarse granulation Element 1 0 > 17 Outlet of treated water 11 Top plate 12, 13, 18, 19 Oil and grapefruit outlet 12a ^ 1 3a, 18 a, 1 9a On-off valve 14 Inlet of treated water 16 Coarse coarse particles Chemical element 20 Filter 20a Water inlet V 20b Water outlet 20c Body 3] 2XP / Invention Manual (Supplement) / 94-06 / 94] 07277 14 200536596 20d 20e 20 f

Bolt Passing element Box cover 312XP / Invention manual (Supplement) m-06 / 94107277

Claims (1)

200536596 10. Scope of patent application: 1. An oil-water separation device comprising: a pre-separation chamber formed by a coarse-grained element having a relatively large sieve opening; and a coarse particle larger than the preceding-stage separation chamber The later stage separation chamber formed by coarser granulation elements with finer sieve openings; the treated water is supplied to the above separation chamber, and the treated water discharged from the preceding stage separation chamber is sent to the above stage separation chamber. Such an oil-water separation device is characterized in that: A filter is provided to separate solid particles contained in the water to be treated, which is filtered by the filter element from the preceding stage separation chamber to the latter stage separation chamber. 2. A kind of oil-water separation device, characterized in that, in a vertical sealed container, a partition plate is divided into an upper front separation chamber and a lower rear separation chamber, and the aforementioned front separation chamber is provided with a relatively large screen hole. The coarse-grained element is supplied with water to be treated from a supply port on the upper part of the preceding-stage separation chamber, and is discharged through a coarse-grained element in the preceding-stage separation chamber through a discharge port provided below it. The rear separation chamber is provided with coarser granulation elements which are finer than the sieve openings of the coarse granulation elements in the previous separation chamber. The treated water flowing from the upper inlet of the rear separation chamber passes through the rear separation chamber. The coarse-grained element is discharged from a discharge port provided below it. Further, the sealed container is additionally provided with an outlet that can be separated and contained in the discharge port filtered by the filter element from the preceding-stage separation chamber to the out-stage separation chamber. Filter for solid particles of treated water. 3. The oil-water separation device according to item 1 or 2 of the scope of patent application, wherein the filter element in the aforementioned filter is coarse-grained 16 312XP / Invention Specification (Supplement) / 94-06 / 94107277 200536596 A filter element with the same sieve element, or a filter element with a smaller sieve than the coarse-grained element in the above-mentioned separation chamber. 4. For the oil-water separation device according to item 1 or 2 of the patent application scope, wherein the coarse-grained element in the above-mentioned separation chamber is a hydrophilic material. 5. For the oil-water separation device according to item 1 or 2 of the patent application scope, wherein the filter element in the filter is a hydrophilic material. 17 312XP / Invention Manual (Supplement) / 94-06 / 94107277