KR19990021594A - Water contact oil separator - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Water contact oil separator

2. The technical gist of the invention

The present invention is to form a plurality of air chambers in the stacked egg plate-shaped oil-water separation pack to contact the plurality of water droplets of oil droplets having a minimum surface area of the oil-water separator to quickly rise to the top surface in the state of the maximum contact area The purpose is to provide.

3. Summary of Solution to Invention

The present invention is a sump tank; Centrifuging the mixture to centrifuge the oil, causing the heavy sludge to settle; A dam plate having a plurality of through holes for passing water and oil mixed water therethrough; Front and rear flow rate distribution plates having slits elongated in the longitudinal direction at predetermined intervals to distribute the flow rate of the mixed water passing through the through hole of the dam plate; And a continuous air ridge and a valley, and an air chamber is formed in each ridge so as to form a plurality of water layers, and oil-water separation for causing the oil floating in the water layers of the air chambers to float to the uppermost surface of the collection tank. It provides a water contact oil and water separation device comprising a means.

4. Important uses of the invention

To quickly separate and remove oil contained in waste water from water.

Description

Water contact oil separator

The present invention relates to an oil / water separator for separating and removing oil and sludge contained in wastewater discharged from a factory or a home, and in particular, exists as droplets in water by using a stacked egg-shaped water contact separator. It relates to a surface contact oil and water separation device that maximizes the removal efficiency of oil by bringing the oil into contact with a plurality of water surface to quickly rise to the top surface in a state where the contact area is increased.

In general, the sludge in the mixture of water, oil and sludge is mainly used to sediment the buoyancy difference as a way to separate the water and oil, its basic principle is stoke's low The specific gravity difference of the oil-and-water mixture by is used.

Conventional buoyancy oil separation device has been used a CPS (Coalescing Plate Separator) method of separating the water and oil by horizontally installing a pack formed by stacking the corrugated partition formed with holes on the ridge, but this pack Sludge is accumulated in the bone area of the oil-water separation efficiency is reduced, and there was a problem that frequent cleaning for sludge removal.

94-17548, previously filed by the present applicant to solve the above-mentioned defects, as shown in Fig. 1, the pack 102 and the front and rear of the pack 102, each of which has holes formed in the ridges and valleys mounted in the sump 101 By increasing the volumetric efficiency of the pack 102 by using the perforated plate 103 mounted at a distance away from the side through the ridged hole, the oil can rise quickly to the surface and settle the sludge through the hole in the valley. An EPS (Egg-shape Plate Separator) method has been proposed to improve maintenance and oil separation efficiency.

However, in the EPS type oil / water separator, the oil specific gravity is 0.9%, and if the oil droplet is 15μ or more, 100% is removed, but since it is only 90%, the maximum floating efficiency of oil droplets of 15μ or less can be obtained. There was no problem.

Accordingly, the present invention has been made in order to solve the above problems, to form a plurality of air chambers in the laminated egg-shaped surface contact separation pack having a minimum surface area in the mixture of water, oil, and sludge mixed It is an object of the present invention to provide a water contact type oil / water separator for contacting a plurality of surfaces with oil droplets so as to quickly float to the top surface in a state where the contact area is maximized.

Accordingly, the present invention has been made in order to solve the above problems, to form a plurality of air chambers in the laminated egg-shaped surface contact separation pack having a minimum surface area in the mixture of water, oil, and sludge mixed It is an object of the present invention to provide a water contact type oil / water separator for contacting a plurality of surfaces with oil droplets so as to quickly float to the top surface in a state where the contact area is maximized.

1 is a schematic view showing the configuration of an EPS oil / water separator according to the prior art;

2A and 2B are schematic diagrams for explaining the principle of the water contact oil / water separator according to the present invention;

Figure 3 is a front sectional view schematically showing the configuration of one embodiment of a water contact type oil separation device according to the present invention;

4 is a plan view of FIG. 3;

5 is a perspective view showing the structure of a dam plate which is a main part of the present invention;

Figure 6 is an exploded perspective view showing the configuration of the oil-water separation tank which is the main part of the present invention;

7 is a functional state diagram showing the separation state of water, oil and sludge of the mixed water.

Explanation of symbols for the main parts of the drawings

1: collection tank 2: drain pipe

3: sludge discharge screw 4: sludge sump tank

5: centrifuge 6: first dam plate

7: second dam plate 8: third dam plate

9: Incision Piece 10: Flow Distribution Plate

11: oil and water separation pack 12: ridge

13: bone 14: air chamber

15: oil floating hole 16: air distribution pipe

17: blower 18: pack presser

19: velocity barrier membrane 20: folding member

21: fluid blocking plate 22: belt oil skimmer

23: oil blocking dam 24: treated water dam

25: treatment tank 26: valve

In order to achieve the above object, the present invention, a water collection tank formed with an inlet for introducing a mixture of water, oil and sludge on one side; It is mounted upright on the inner side of the sump, the centrifugal separation of the introduced mixture, the oil is first floated, the heavy sludge settles the centrifuge; A dam plate which is mounted upright on one side of the centrifuge and has a plurality of through holes for passing water and oil mixed water therethrough; A front and rear flow rate distribution plate which is installed upright at a predetermined interval on one side of the dam plate and has slits long in the longitudinal direction at predetermined intervals so as to distribute the flow rate of the mixed water passing through the through hole of the dam plate; And both sides mounted on the front and rear flow distribution plates, and having continuous ridges and valleys, and an air chamber is formed in each ridge so as to form a plurality of water layers. It provides a water-contact oil-water separator comprising an oil-water separation means formed in the oil levitation hole in the waist ridge to secondary floating the oil suspended in the layer to the top surface of the sump.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings of FIGS. 2 to 4.

2A and 2B are schematic diagrams for explaining the principle of the water contact oil / water separator according to the present invention; Figure 3 is a front sectional view schematically showing the configuration of one embodiment of a water contact type oil separation device according to the present invention; 4 is a plan view of FIG. 3; 5 is a perspective view showing the structure of a dam plate which is a main part of the present invention; Figure 6 is an exploded perspective view showing the configuration of the oil-water separation tank which is the main part of the present invention; 7 is a functional state diagram showing the separation state of water, oil and sludge of the mixed water.

In the drawing, 1 is a sump, 1a is an inlet, 2 is a drain pipe, 3 is a sludge drain screw, 4 is a sludge sump, 5 is a centrifuge, 6 is a first dam plate, 7 is a second dam plate, 8 is a third dam plate, and 6a. , 7a, 8a is through hole, 6b, 7b, 8b is bent portion, 9 is cut piece, 10 is flow distribution plate, 10a is slit, 11 is oil-water separation pack, 12 is ridge, 12a is air inlet hole, 13 Silver valley, 13a is sludge discharge hole, 14 is air chamber, 15 is oil floating hole, 16 is air distribution pipe, 16a is upper hole, 17 is blower, 18 is pack presser, 19 is flow barrier, 20 is folding member, 21 is a fluid blocking plate, 22 is a belt oil skimmer, 23 is an oil blocking dam, 24 is a treatment water dam, 25 is a treatment tank, and 26 is a valve.

The surface contact oil / oil separator according to the present invention is implemented to maximize the speed of injury by increasing the area by contacting a plurality of surfaces with oil droplets having a minimum surface area contained in a mixture of water, oil, and sludge. As shown in FIG. 2A, the oil present in the droplet state having the smallest surface area in water does not float well due to its small buoyancy, but as the small oil droplet floats to the surface as shown in FIG. 2B, it is rapidly thin and spreads widely while buoyancy is increased. It is based on the principle that 100 to 1000 times increase than exist in water. For example, using the buoyancy area A = πd² / 4, the diameter of the oil droplet of FIG. 2A is Φ10 and the diameter of the oil droplet of FIG. 2B is Φ100, first, FIG. 2A is π10² / 4 = 78.5. 2B is π 100 ² / 4 = 7850 mm 2, resulting in a difference of 100 times.

In this embodiment, in order to use the principle to the maximum, the height of the water surface is lowered to shorten the injured time of oil droplets, and a plurality of water contact air chambers are formed on the egg-shaped surface contact separation pack to contact oil droplets. It has a structure that maximizes the area.

The configuration thereof is described in more detail as follows.

As shown in Figures 2 and 3, the water collection tank (1) in which a mixture of water, oil, and sludge is embedded has a funnel shape, and the lower portion of the water collection tank (1) to discharge the sludge precipitated from the mixed water A drain pipe 2 is provided. In addition, the sludge discharge screw (3) connected to the drain pipe (2) is mounted on the lower slope of the water collecting tank (1), the sludge discharge screw (3) is a spiral of the sludge discharged from the drain pipe (2) By using a screw pulled to the upper side to be discharged to the external sludge collection tank (4).

An inlet 1a through which the mixed water flows is formed at one side of the water collecting tank 1, and a centrifuge 5 for separating the mixed water and sludge is installed at the inlet 1a side, and a known dissolved air flotation device (drawings). Oil, water and sludge of the mixture introduced by the (not shown in Figure 1) is first separated and the sludge is settled, the oil is floated to the surface.

One side of the centrifuge 5 is mounted at least one dam plate to stand upright to remove large and small oil droplets formed in a constant flow rate of the mixed water discharged therefrom, in this embodiment the first to third dam plates (6) , 7 and 8 are mounted at a predetermined distance, and each of the first to third dam plates 8 is provided with a plurality of through holes 6a, 7a, and 8a having a predetermined size. It becomes a structure formed gradually smaller toward the 1st thru | or 3rd dam plate 6,7,8 side. This is to sequentially remove oil droplets having a large area formed under pressure at a constant flow rate so that only oil droplets having a minimum surface area pass through the through holes 8a of the third dam plate 8, and the first to Bending portions 6b, 7b, and 8b, in which upper portions of the third dam plates 6, 7, and 8 are bent inclined to one side, are formed so that oil suspended on the uppermost surface flows well without disturbing the dam plate. Doing.

As shown in FIG. 5, an upper part of the outer circumferential surface of the through holes of the first to third dam plates 6, 7 and 8 is integrally provided with a cutting piece 9 cut at a predetermined inclination angle and thus sludge according to the flow rate of the mixed water. Is blocked from passing through the through hole, and the sludge hit by one surface of the cut piece 9 is allowed to flow down the inclined surface of the cut piece 9 to be settled.

On one side of the third dam plate 8, the front and rear flow distribution plate 10 in which a plurality of slits 10a for distributing oil droplets having a minimum surface area and water to each layer are formed at predetermined intervals is upright. It is installed.

As shown in FIG. 6, a plurality of egg plate-shaped partitions having ridges 12 and valleys 13 are stacked and stacked on the front and rear side flow distribution plates 10 to form a plurality of oil contact surfaces. The oil-water separation pack 11 in which the air chamber is formed in the ridge 12 is mounted.

The oil-water separation pack 11 is attached to the front and rear flow distribution plate 10, and each stacking interval of the oil-water separation pack 11 is adhered to the upper and lower slit widths so that all the mixed water passing through the slit is an oil-water separation pack ( It is to be able to flow between lamination gaps of 11).

Therefore, the front and rear surfaces of the oil / water separation pack 11 are blocked by the flow distribution plate 11, and both sides are blocked by the inner surface of the water collecting tank 1, and in this state, mixed water flows into the water collecting tank 1. When the ridge 12 of the oil and water separation pack 11 is formed with an air chamber 14 filled with air, and each of the air chambers 14 are formed with a low water layer, so that the flow distribution plate 10 is formed into the water layer. The oil droplets that pass through the slit (10a) is to form a large area.

Here, the oil levitation hole 15 of a predetermined size, which is a path for dropping the oil suspended in the water layer of each air chamber 14 to float to the water layer of the water collecting tank 1, on the waist ridge line of the oil / water separation pack 11. ) Is vertically penetrated. In addition, an air inlet hole 12a is formed in the ridge part 12 of the oil / water separation pack to provide a path for replenishing air dissolved in the water surface in the air chamber 15, and in the valley part 13 in the mixed water. A discharge hole 13a for discharging the included sludge into the drain pipe 2 below the water collecting tank 1 is formed. Each of the lowermost ridges 12 of the oil / water separation pack 11 is equipped with an air distribution pipe 16 having a plurality of upper holes 16a formed at predetermined intervals, and providing air to the air distribution pipe 16. The blower 17 and the valve 26 for controlling the air inlet between the air distribution pipe 16 and the blower 17 is mounted.

At this time, the air distribution pipe 16 increases the air pressure of the air chamber 14, and the oil suspended in the water layer of each air chamber 14 to the water collecting tank (1) surface of the upper through the oil floating hole (15) It also floats and compensates the amount of air inherent in the air room to maintain a constant pressure.

In addition, each of the top valleys 13 of the oil and water separation pack 16 is equipped with a pack presser 18 to prevent the oil and water separation pack 11 from floating by buoyancy.

The lower portion of the rear flow rate distribution plate 10 is equipped with a flow rate blocking membrane 19, the flow rate blocking membrane 19 by blocking the bottom end space of the sump (1) and the oil-water separation pack 11, the oil-water separation pack (11) When the sludge in the mixed water passing through the slit 10a of the rear flow distribution plate 10 is settled and accumulated on the inclined surface of the sump tank, the mixed water is prevented from flowing into the treatment tank through the lower part of the sludge. When the sludge is discharged into the drain pipe 2, the sludge is connected by the folding member 20 so that the sludge is closed by itself.

The fluid blocking plate 21 is mounted upright on the air distribution pipe 16 located at the center of the oil / water separation pack 11 so that the mixed water containing fine sludge is discharged from the lower portion of the oil / water separation pack 11. To prevent backflow to the side.

On the other hand, the upper one side of the rear flow distribution plate 10 is equipped with a belt-type oil removal device of No. 96-99620 registered and registered by the applicant of the present application to remove the oil suspended in the water layer of the water tank and the water is treated To be discharged to the tank, a detailed description of the belt-type oil removing device is omitted and briefly described as follows.

As shown in FIG. 3, a belt oil skimmer 22 for filtering and removing oil suspended in the uppermost water surface between the rear flow distribution plate 10 and the oil / water separation pack 11, and the oil suspended in the uppermost water surface. Oil blocking dam 23 for preventing the inflow into the treatment tank to be described later than the layer, and the oil blocking dam 23 is mounted on one side and passed through the slit 10a of the rear flow distribution plate 10. A treatment water dam 24 and a treatment water tank 25 for collecting and discharging only clean water are mounted.

The working state of the present invention configured as described above will be described.

First, when the mixed water is introduced into the sump (1) through the inlet (1a), the centrifuge (5) is driven to firstly separate the mixture of various sludges, water and oil to settle the sludge, the oil is Injury to the surface.

Then, the separated mixed water sequentially passes through the through holes 6a, 7a, and 8a of the first to third dam plates 6 and 7, at a constant flow rate, and removes large and small oil droplets formed at the constant flow rate. Only the oil droplet having the minimum surface area is discharged through the through hole 8a of the third dam plate 8 and passed through the slit 10a of the front flow distribution plate 10.

At this time, when passing through the through holes of the first to third dam plates (6, 7, 8) to block the inflow of sludge by the cutting piece (9), and the sludge hit the cutting piece (9) It settles on the inclined surface of the piece 9.

The mixed water passing through the slit 10a of the front flow distribution plate 10 flows uniformly between the stacking intervals of the oil / water separation pack 11, and the oil droplets float on the water surface of the air chamber 14 of each layer. It spreads widely and forms and accumulates oil droplets having an area as large as a predetermined size.

The oil accumulated on the surface of each air chamber 14 rises to the top surface of the water collecting tank 1 through the oil floating hole 15 formed in the waist ridge by the air pressure of the air chamber 14. In addition, unseparated sludge in the mixed water flowing between the stacking intervals of the oil / water separation pack 11 is sedimented secondly, and a lower portion of the water collecting tank 1 through the sludge discharge hole 13a formed in the valley 13 of the oil / water separation pack 11. Gathered in the drain pipe (2) provided in, is carried by the sludge discharge screw (3) is discharged to the external sludge collection tank (4).

On the other hand, the air pressure of the stacked air chamber 14 is dissolved in the mixed water while dropping the floating oil to move to the upper surface, accordingly, if the air pressure drops, by driving the blower 17 to the air distribution pipe (16) By blowing air into the air), each of the laminated through the air inlet hole (12a) formed in each ridge portion 12 of the oil-water separation pack 11 through the upper hole (16a) of the air distribution pipe (16) The air chamber 14 of the air is filled with a constant pressure again.

In addition, the sludge passed through the sludge discharge hole 13a by the fluid blocking plate 21 (only one is shown in this FIG. 3) mounted at each predetermined position among the plurality of air distribution pipes 16 is changed according to the flow rate. Prevent backflow to the discharge hole.

The oil floated to the top surface of the water collecting tank 1 through the oil / water separation pack 11 is accumulated while being widely spread in contact with the water surface. The accumulated oil is separated from the water by the belt oil skimmer 22 to discharge only the oil, and the treated water from which the oil passed through the slit 10a of the rear flow distribution plate 10 is removed is an oil blocking dam ( 23) flows into the treatment water tank 25 through the treatment water dam 24 through the lower space and is discharged.

At this time, the sludge contained in the treated water is sedimented in the third to accumulate in the flow rate blocking film 19 mounted on the lower portion of the rear flow distribution plate 10, when the sludge reaches a predetermined weight, the The flow rate barrier membrane 19 is opened and discharged to the drain pipe 2. When the discharge of the sludge is completed, the flow rate barrier membrane 19 is closed by itself.

As described above, the present invention uses the principle that oil droplets are widely spread in the water layer so that only oil can be quickly floated to the water surface when the oil is separated.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

As described above, according to the present invention, the oval-shaped water contact type oil / water separation pack forms an air chamber, making the water contact height of the oil chamber included in the mixed water as low as possible, and increasing the oil surface area to a minimum of 15 μ or less. The surface area of the oil droplets to increase the efficiency of the maximal, the chemical oxygen demand (COD) due to the surface contact is reduced, the device can be miniaturized and the manufacturing cost can be reduced.

Claims (13)

A water collecting tank having an inlet for introducing a mixture of water, oil, and sludge to one side; It is mounted upright on the inner side of the sump, the centrifugal separation of the introduced mixture, the oil is first floated, the heavy sludge settles the centrifuge; A dam plate which is mounted upright on one side of the centrifuge and has a plurality of through holes for passing water and oil mixed water therethrough; A front and rear flow rate distribution plate which is installed upright at a predetermined interval on one side of the dam plate and has slits long in the longitudinal direction at predetermined intervals so as to distribute the flow rate of the mixed water passing through the through hole of the dam plate; And Both sides are mounted in a state of being stacked on the front and rear flow distribution plates, and have continuous ridges and valleys, and air chambers are formed in each ridge so as to form a plurality of sleep layers. Oil-water separation means with oil floating hole formed at the waist ridge to secondary float the oil suspended in the water tank Sleep contact oil-water separator comprising a. The method of claim 1, The water collection tank is a water contacting device for water contact, characterized in that formed in a funnel shape so that the fine sludge contained in the mixed water is settled in the flow rate. The method of claim 2, A drain pipe provided at a lower portion of the sump to discharge the collected sludge; And a sludge discharge means having a spiral moving path connected to the drain pipe to lift the sludge discharged and discharged to an external water tank. The method of claim 1, And a cut piece protruding at a predetermined inclination angle on an upper circumference of each through hole of the dam plate to prevent sludge contained in the mixed water from flowing into the through hole. The method according to claim 1 or 4, The dam plate is installed at predetermined intervals in a shape in which the upper portion is bent at a predetermined angle, and a plurality of through holes formed in each dam plate are sequentially prescribed to remove large and small oil droplets formed by the flow rate of the mixed water of oil and water. Sleep contact type oil-water separator, characterized in that formed as small as size. The method of claim 1, The oil and water separation means An air inlet hole is formed in the ridge to fill the air in the air chamber, and the water contact device for water contact type, characterized in that the discharge portion for sedimenting the sludge formed in the valley. The method according to claim 1 or 6, And a means for providing air to each air chamber at the bottom of each of the ridges of the oil-separating means. The method of claim 7, wherein The air providing means An air distribution pipe having a plurality of through-holes formed at predetermined intervals thereon to communicate with the air inlet hole of the ridge; A blower for blowing air into the air distribution pipe; And And a valve mounted between the air distribution pipe and the blower. The method of claim 8, And a fluid blocking plate mounted on the lower surface of the air distribution pipe to prevent the sludge discharged to the sludge discharge hole from flowing back to the discharge hole on the other side by the flow velocity. The method of claim 1, Sleeping contact type oil-water separator is characterized in that it further comprises a pack support that is mounted to each bone portion of the top of the oil-water separation means to press the oil-water separation means to prevent floating by buoyancy. The method of claim 1, It is mounted on the lower portion of the rear flow rate distribution plate to block the space at the bottom end of one side of the oil-water separation means, and when sludge in the mixed water passing through the slit of the rear flow rate distribution plate is accumulated on the inclined surface of the sump, it is opened by the sludge's own weight. When the sludge is discharged, the flow rate blocking membrane is closed by itself; And The rear contact flow distribution plate is connected to the flow rate blocking membrane, the surface of the water contact type water separator, characterized in that the flow rate blocking membrane comprises a folding member. The method of claim 1, And a means for removing oil injured on the uppermost surface by being installed between the oil / water separator and the rear flow distribution plate. The method of claim 12, The oil removing means A belt skimmer for filtering and removing oil suspended in water; An oil cutoff dam positioned above the oil layer suspended on the uppermost water surface to block oil from overflowing to the outside; A treated water dam mounted on one side of the oil blocking dam to enter only the treated water passing through a slit of a rear flow distribution plate; And Treated water tank to collect and discharge the treated water introduced through the treated water dam Water contact type oil-water separation device comprising a.