KR20040074019A - A oil-water separator of 「AOS(Advanced Oily water Separator)」Type - Google Patents

Abstract

PURPOSE: An AOS (advanced oily water separator) type oily water separation apparatus is provided which is used to remove ally types of oil and oily sludge and economical by enabling treatment facility to be operated without power and chemical treatment agent during the treatment process. CONSTITUTION: The AOS (advanced oily water separator) type oily water separation apparatus comprises an oily pass unit comprising an oily and sludge separation plate formed of TP 601 plate having thickness of 5 mm and formed in a "V" character shape to treat oily and sludge at a constant treatment flow rate; a slit chamber(21) formed of TP 601 plate having thickness of 5 mm or STS 304 plate and punching screen, the slit chamber comprising a movable filter formed of ultra-high molecular weight polyethylene and installed in the chamber to selectively adsorb oil component contained suspended solid in oil contained wastewater so that the adsorbed suspended solid is precipitated on the bottom of the chamber, a copper buoyancy positioned at the side of discharge port in rear of the slit chamber to cut off discharge of oil components through the discharge port; an oily water separator(22) comprising a filter operated by gravitation and buoyancy without power during the oily water separation process and formed of ultra-high molecular weight polyethylene to precipitate fine suspended solid and float the oil components by buoyancy as oil components adsorbed onto the filter are being enlarged by gravitation; and an automatic valve device comprising automatic oil discharge unit and oil discharge cutoff unit.

Description

AOS (Advanced Oily water Separator) Type {A oil-water separator of `` AOS (Advanced Oily water Separator) Type}

The present invention relates to an AOS Type oil / water separator, and AOS TYPE oil / water separator is a pure physical treatment facility, which can be used for the purpose of removing all kinds of OIL & OILY SLUDGE. It is an economical oil and water separation facility with almost no maintenance and management costs because it can be operated without the use of water treatment.

Oil-water separation refers to a phenomenon in which the oil contained in water or water in oil is separated by the specific gravity difference between oil and water in a gravity field or centrifugal field. When oil mixed in factory wastewater or wash water becomes oil droplets and the emulsion dispersed in water is left in the tank, the oil is lighter than water, so it floats and condenses into two liquid phases of oil and water. This is called floating separation and is the opposite of sedimentation of water droplets in oil, but the phenomenon is the same. If the size of the oil droplets is 1mm or more, the emulsion is unstable and relatively easy to separate, but emulsions with oil droplets of 1 to 1.5㎛ in diameter are stable and take a long time to separate flocculation. When the emulsion is warmed, the viscosity becomes low, and the movement speed of the water droplets increases, and when the surface tension of the water droplets is large, the condensation speed increases. To promote the condensation of droplets, there is a filtration method using a hydrophilic or hydrophobic membrane or a fibrous layer depending on the purpose, and is used to remove trace moisture in aircraft fuel. The API (American Petroleum Institute) oil water separator, which is widely used as an oil water separator for wastewater contained in petroleum refinery, installs several horizontal plates in a tank to remove sedimentary particles and continuously separate oil droplets of 150 µm or more. Recover. Parallel plate interception (PPI) or corrugated plate interceptor (CPI) oil / water separators, which increase the effective separation area by inserting multiple parallel inclined plates into the tank instead of horizontal plates, replace the inclined plates with wave plates instead of flat plates. It is used for separation of oil droplets over 60㎛. In some cases, additional physicochemical or biological treatment facilities may be installed. For stable emulsions, centrifugal decanters or centrifuges are used. If the oil floats on the surface in a glass state, the oil is pumped up with water to settle or separate in the tank, or absorbed and recovered by pumice, sawdust, cloth, sponge, etc. Dispersed in water and settled in water.

In addition, there are EPS, CPS, and SPS. These oil / water separators are fixed, not fluid, using a multi-stage corrugated or egg-shaped combination. As a result, the adsorption power is reduced, and the oil concentration of the influent is limited to 1000-1,500 ppm or less, and the suspended solids concentration of the influent is also limited to 250 ppm or less. Inflow oil is only available for low viscosity oils such as lubricating oil, fuel oil, and machine oil, and is vulnerable to grease, bunker C oil, and animal oil.

As such, the existing oil / water separator has disadvantages such as low efficiency, high price, low processing capacity, and specific oil effect.

Therefore, the technical problem to be achieved by the present invention is to provide a oil and water separator capable of easily maintaining and economical, processing efficiency and high capacity by overcoming the various problems described above.

Oil and water separators installed in existing wastewater treatment plants require continuous facility operation to ensure the stability of treatment efficiency.

Civil oil and water separation facilities installed in rainwater or drainage pipelines are not easy to maintain, even in well-equipped oil and water separation facilities because the flow rate of influent changes and the inflow of large inflows is intermittent. Therefore, the most important thing to be equipped as a civil oil water separation facility should be a constant treatment efficiency irrespective of the change of the inflow flow rate, and the oil water separation device of the structure that does not require a separate mechanical operation during sudden rainfall.

The AOS Type oil / water separator according to the present invention can be easily maintained by overcoming these disadvantages.

The biggest drawback of existing oil-water separation facilities with mechanical devices, such as pressurized flotation devices, is that the facility is not operated continuously, resulting in a shortened lifespan due to the deterioration of mechanical devices. Therefore, it is necessary to check the mechanical elements on a regular basis, and in order to handle the inflow of water according to the oil-water separation facilities for civil engineering, it is necessary to install a separate civil construction work for the drainage facility because an automatic valve device for drainage and inflow flow control is essential. Since the installation of machinery facilities is necessary, the cost of facilities increases.

The AOS Type oil / water separator according to the present invention can overcome the above disadvantages and implement economical technology.

In addition, it has a high treatment efficiency and can digest a large amount of treatment capacity.

1 is a process chart of an oil / water separator according to the present invention.

Figure 2 is a plan view of the installation of AOS TYPE oil and water separation facilities according to the present invention

3 is a view showing an example of a gravity mud chamber according to the present invention.

Figure 4 is a view from the front of the gravity mud chamber according to the present invention.

5 is a view showing an example of an oil / water separator according to the present invention.

6 is a view showing an example of an automatic valve device according to the present invention.

Figure 7 is a view showing the shape when using the filter material U.H.M.W according to the present invention.

* <Explanation of symbols for main parts of drawing>

21: Gravity Mud Chamber

22: oil / water separator

31: tube

32: gravity mud chamber

41: Gravity Mud Chamber

51: tube

52: oil / water separator

61: automatic valve device

71: U.H.M.W (Ultra High Molecular Weight Polyethylene)

AO (Advanced Oily Water Separator) type oil water separator according to the present invention is a technology developed for the purpose of preventing the outflow of oil that causes environmental pollution.

The oil-separation process of the AOS Type oil-water separator is as follows.

"Oil Pass (S11) Gravity mud chamber (S12) Oil Water Separator (S13) Automatic valve device (S14) "consists of four processes.

First, let's look at OIL PASS (S11). OIL PASS is a device for removing OILY & SLUDGE that is not easy to remove in general wastewater such as screens in the wastewater. It can be operated without a separate mechanical device or power source to separate OILY & SLUDGE. Do. OILY & SLUDGE Separator of OIL PASS is a new material (material: TP 601 5t PLATE) that does not affect SLUDGE Separation ability even after long time use. It is possible, and it is easy to maintain and manage because there is no need to stop operation of the treatment facility to clean the separator. OILY SLUDGE separated by OIL PASS's separating plate is piled down, and there is no reduction in treatment flow rate.

In addition, the shape is also configured so that the amount is always constant without a decrease in the flow rate to take the V-shaped process rather than straight.

The gravity chamber (SILT CHAMBER) (21, 32, 41) is as follows.

Unlike other oil separation facilities, AOS TYPE oil / water separators are designed to be flexible instead of fixed, so that they actively cope with changes in inflow flow and require no power usage during operation of oil / water separation facilities. Facility. Among the factors that determine the treatment efficiency of AOS TYPE oil and water separation facilities, the role of gravity mud chambers (21, 32, 41) is the most important. Gravity mud chambers play the most important role of increasing the oil-water separation efficiency by selectively adsorbing suspended solids containing OIL components in the wastewater and sedimenting under the flow of the filter. This filter component can be used semi-permanently, and it is designed to simply clean the filter as high-pressure air or high-pressure water during operation, so it is possible to operate an economical treatment facility.

Treatment capacity is 10㎥ / hr ~ 3,000㎥ / hr, and the material is CHAMBER, TP 601 5t PLATE or STS 304 PLATE & PUNCHING SCREEN, and FILTER is ultra high molecular weight engineering plastic (U.H.M.W).

It is located at the outlet of the rear end of the gravity mud chamber in the oil and water separation tank to install the buoyant copper, and when the oil and vegetable OIL components in the treatment tank are deposited more than the specified quantity, it blocks the OIL component from the outlet through the operation of the alarm device. However, the specific gravity sensor using the specific gravity of OIL is applied to the place where maintenance and management of the treatment facility is not easy.

Let's look at OILY WATER SEPARATOR (22, 52). Wastewater containing suspended solids passing through the gravity mud chamber is adsorbed to the FILTER built in the CHAMBER through the vertical flow in the process of flowing into the oil separator, and the OIL component is collected to the top of the oil separator by buoyancy. This completes oil separation.

In the case of oil-water separators 22 and 52, since the suspended matter in the wastewater contained in the gravity mud chamber is almost removed, the cleaning cycle of the filter is longer than that of the gravity mud chamber. Typically, one cleaning oil gravity separator is suitable for cleaning three times the gravity mud chamber, but it may vary depending on the characteristics of the wastewater and operating conditions.

FILTER of oil / water separator also has semi-permanent life as there is almost no deformation of the material except the chemical component of chemical erosion or fire due to fire, and like the filter of gravity mud chamber, the filter for maintenance and management of treatment facilities It is an economical treatment facility that can be operated only by cleaning.

AOS TYPE oil / water separator has constant treatment efficiency regardless of influent concentration, and can be used for any purpose to remove OIL in water or water in OIL, and maximum processing efficiency is less than 1ppm. The biggest advantage is that it is not necessary.

AOS TYPE oil and water separators (22 and 52) are installed by applying various types of FILTER according to the characteristics of influent, and there is a clear difference from corrugated plates or flopack coalescing media installed in general oil and water separators.

It is a filtering method using gravity and buoyancy, which does not require the use of power during oil-separation process, and thus the facility is easy to maintain and the flow rate can be processed without the need for a separate machine operation in case of sudden inflow of pollutants. None is the greatest advantage.

It precipitates fine suspended matter and rapidly rises due to buoyancy as the OIL component adsorbed to the FILTER increases due to gravity, and it has the highest treatment efficiency among other oil / water separators. Treatment efficiency is less than 1 ppm.

At this time, the filter used to process the ultra-high molecular weight polyethylene resin (U.H.M.W) (71) in an irregular granular shape to maximize the effective surface area that can be in contact with the fine OIL components in the inflow water.

Ultra High Molecular Weight Polyethylene (UHMW) (71), a very high molecular polyethylene resin, is a high molecular compound and has excellent adsorptive power and can be used semi-permanently as it has a heat resistance of 120 ° C, impact resistance and abrasion resistance. It can be said that it is most suitable as filter material of oil / water separator.

Let's look at the automatic valve device (61).

The main difference between the automatic valve device of the AOS TYPE oil-water separator is that it is simple to maintain and manage, and it can be operated unattended without the use of machinery or power in addition to economical mounting. In particular, the devices for collecting and discharging OIL components can be installed according to the site situation, and the biggest advantage is that these devices are pure physical concepts and are simple to maintain and manage. Automatic valve device is composed of automatic oil discharge device and oil discharge shutoff device.

As described above, the AOS oil / water separation facility separates the OIL component and SLUDGE in the inflow water by gravity and buoyancy as well as the adhesion properties of ultra high molecular weight polyethylene resin.

The FILTER built in the gravity mud chamber (SILT CHAMBER) and oil water separator (OILY WATER SEPARATOR), which is a sludge removal device of AOS oil water separation facility, processes ultra high molecular weight polyethylene resin into irregular granular form to contact the inflow water with minute OIL components. The effective surface area can be maximized.

Especially, since the surface area of the built-in filter is 50 ~ 100 times wider than the filter surface of other oil and water separation facilities, it adsorbs and precipitates even the finest suspended matter effectively.

Therefore, it adsorbs fine sludge as well as suspended solids floating on the surface of the water, and larger dirt is accumulated on the bottom of the sedimentation tank by the continuous adsorption and sedimentation movement of the filter panel.

This feature of the device is easy to cope with the increase in flow rate and flow rate at the inlet, there is no malfunction of the gravity mud chamber due to a malfunction, and there is no mechanical element has the advantage of easy maintenance of the facility.

The advantages of the AOS oil / water separator manufactured by the above-mentioned method are the reduction of facility investment cost, maintenance cost, stability of treatment efficiency, and the like.

Simplified treatment due to the installation of AOS TYPE oil and water separators reduces the cost of facility investment due to the small scale of civil engineering and power plant installations, and it is economical because there is no input of replacement and inspection costs due to the aging of power plants. As long as the durability of the facility is semi-permanent as long as there is no erosion of the material, it is suitable for long-term treatment planning.

In particular, the treated water that has passed through the AOS oil / water separation facility has a maximum treatment efficiency of less than 1ppm, and can be transferred to CHEMICAL W / W POND by a pump in the wastewater treatment plant, thereby reducing the cost of intermediate facilities and civil works. Although oil skimmers in most pre-treatment stages can be seen as a means to increase the efficiency of oil-separation, the main reason is the presence of water at the top of the sump when transferring wastewater from the sump to the sewage system by suction pump. When the OIL layer becomes thick after a certain period of time, a large amount of OIL flows into the oil separation plant and the function of the filter is paralyzed. These oils also have a short lifespan and need to be replaced every 2-3 years.

The filter embedded in the general oil / water separation facility uses a PP material filter, and many efforts have been made to maintain the treatment efficiency by introducing mechanical devices such as the structure and installation angle of the filter as well as the pressure flotation device. The fundamental reason for the need for listening is that the filter is fixedly installed, which can only play the role of SCREEN, so the cleaning cycle is short, and finally, the absorbent cloth (je) is used essentially until the last treatment step.

Therefore, periodical inspection of the facility is required after installation of the facility, and it is uneconomical because the cost of replacing the absorbent cloth (J) and the separate waste disposal cost are required.

The AOS TYPE oil and water separation facility is processed by the physical adsorption and sedimentation of the filter from the gravity mud chamber (SILT CHAMBER) to the solids and the fine suspended solids.Therefore, there is no need for a separate oil simmer. The filter aggregates rapidly until it floats and is then transferred to an external OIL storage tank by an automatic oil discharge device, so there is little change in processing efficiency.

As a result of reviewing the performance comparison data for each treatment facility, the AOS TYPE oil and water separation facility has the simplest structure, stable treatment efficiency, economical investment due to low facility investment, and easy maintenance after installation, compared to other treatment facilities. It can be said to be superior.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such variations or modifications are within the scope of the appended claims. will be.

Claims (1)

Oil-water separator consisting of OIL PASS, SILT CHAMBE, Ultra High Molecular Weight Polyethylene (UHMW) as a filter, automatic valve device Separator