Oil-water separation purification system and oil-water separation purification method using same

Abstract

The present invention relates to an oil-water separation purification system and an oil-water separation purification method using same, which provide step-by-step oil-water separation processes so as to efficiently separate and discharge water and oil from contaminated water in which water and oil are mixed, and purify same, and in which the flow of oil-water in the oil-water separation processes is automatically guided in a natural falling manner such that work efficiency and process automation can be provided. The present invention provides the oil-water separation purification system provided in order to separate water and oil, which are mixed in oil-water, and purify same, the oil-water separation purification system comprising: an oil-water storage tank in which oil-water is introduced and stored; a supply pump for discharging and moving the oil-water of the oil-water storage tank; a drum screen for primarily pretreating various kinds of sludge in the oil-water injected from the supply pump; a scum remover for dually separating the remaining sludge and oil-water from the oil-water primarily filtered at the drum screen, and secondarily pretreating same; an oil-water separator for dually separating water and oil from the oil-water pretreated at the scum remover and purifying and discharging same; an inspection tank for identifying the degree of turbidity in the water separated and discharged from the oil-water separator; and a drain pump provided in connection with the bottom of the inspection tank so as to discharge the finally-purified water as sewage, wherein height differences of provided equipment are sequentially different from the drum screen to the drain pump so that the flow of the oil-water from the drum screen to the inspection tank is automatically guided in a natural falling manner.

Description

Oil-water separation purification system and oil-water separation purification method using the same

[0001] The present invention relates to an oil-water separation purification system and an oil-water separation purification method using the same, and more particularly, to an oil-water separation purification system and a glass separation purification method using the same, which provides a step-by-step oil-water separation treatment process in contaminated water mixed with water and oil to efficiently separate and discharge water and oil for purification, and also automatically induces the oil-water flow according to the oil-water separation treatment process in a natural falling manner to provide work efficiency and process automation.

[0002] In general, oil-water separators are devices that separate oil and water, such as those that separate industrial oils generated from various machines, or those that separate oil from wastewater containing animal oil discharged from homes, restaurants, outdoor campsites, and factories that handle animal oil.

[0003] If wastewater containing a mixture of oil and water (hereinafter referred to simply as "oil water") is discharged without further purification, it can cause significant damage to the natural ecosystem. To address this issue, a process for collecting the oil water and pretreating the collected wastewater is essential.

[0004] The methods mainly used to separate water and oil from wastewater containing water and oil include gravity treatment, hydraulic separation, and filter separation.

[0005] First, gravity separation involves floating oil on the water and then skimming it with an oil skimmer to remove it. For example, gravity separation involves allowing the oil to settle in a separation tank or flow along multiple guide plates, and capturing the oil that floats to the surface due to differences in specific gravity with an oil skimmer. Because gravity separation requires installation space and power to float the oil and operate the skimmers, it's only applicable to large-scale facilities, such as sewage treatment plants, where stagnant or slow-moving oil is likely. Furthermore, it presents the disadvantage of being somewhat inconvenient to maintain.

[0006] Hydraulic separation is a method that separates oil and water by centrifugal force and gravity, forming specific flow patterns, such as vortices, within a confined space. However, because hydraulic separation relies on suction and removal of oil suspended at the top, it has a fundamental limitation: complete oil removal is difficult to achieve.

[0007] Filtration separation uses a filter, such as nonwoven fabric, to filter out oil while allowing water to pass through. This method poses a risk of oil leakage if the oil accumulates heavily in the water. Furthermore, it requires regular filter replacement and cleaning, making continuous treatment of the water difficult.

[0008] In particular, wastewater containing animal oil has problems such as difficulty in smooth oil separation due to the phenomenon of animal oil solidifying during the oil separation process, and animal oil solidifying and clogging the area where oil is separated and discharged and the inner walls of sewer pipes.

[0009] Additionally, as the hardened animal oil on the inner walls of the sewer pipes rots, it produces a foul odor and secondary problems occur, such as the foul odor flowing back through the sewer pipes.

[0010] We would like to examine the recently disclosed prior technologies related to oil-water separation.

[0011] Utility Model No. 0432702 (Oil-water separator) discloses a configuration including a container body having an internal space filled with a predetermined amount of water, a partition plate provided in the container body to divide the internal space into a plurality of sections, the lower portion of which is spaced apart from the bottom surface of the container body and the upper portion of which is higher than the water level so that the filled water can move back and forth between the plurality of internal spaces, a water discharge unit formed on a wall surface of the container body where one of the plurality of internal spaces is located and maintaining a constant water level of the filled water, an oil discharge unit formed on a wall surface of the container body where another of the plurality of internal spaces is located and located higher than the position of the water discharge unit, and an oil-water mixture supply unit that supplies an oil-water mixture in which oil and water are mixed toward the internal space where the oil discharge unit is located.

[0012] The above prior art has a simple structure in which water is discharged to a water discharge port beyond the partition plate by a partition plate and oil that does not pass the partition plate is discharged through an oil discharge port. Therefore, when the amount of inflowing water increases rapidly and the water level rises, there is a problem in which an oil layer is formed higher than the oil discharge port, causing water to be discharged as is through the oil discharge port. In addition, the problem of animal oil solidifying and blocking the oil discharge port cannot be solved at all.

[0013] Utility Model No. 0442571 (kettle for oil-water separation) discloses a configuration comprising a kettle body having a predetermined height, a first beak protruding horizontally from the upper portion of the kettle body, and a second beak protruding from the lower portion of the kettle body and extending in a curved or diagonal shape to a height lower than the discharge port of the first beak.

[0014] The above prior art is in the form of a kettle and separates oil and water. Since it has a simple structure that pours the oil layer located on top of the water to one side, there is a problem that if the inflowing oil is not constant, it overflows or oil and water separation is difficult. In addition, this technology cannot solve the problem of animal oil solidifying and blocking the oil discharge part.

[0015] Patent No. 1270222 (oil-water separator) discloses an oil-water separator that is equipped to adjust the height of a plug that slides along the top of a vertical pipe, thereby effectively responding to oil layers of different heights. However, the prior art has a problem in that it is difficult to effectively respond to oil layers that vary depending on the water level simply by adjusting the height of the plug, and the solidification phenomenon of animal oil hinders the height adjustment of the plug.

[0016] In this way, the conventional oil-water separator had a problem in that, because of its structure that required the oil layer level to be precisely adjusted to the part where the oil is discharged, if the flow rate and velocity of the injected oil were high, the oil layer would change, and the oil would not be separated and discharged alone, but would be discharged together with water.

[0017] In addition, although wastewater and sewage separation systems have been proposed, the infrastructure for the purification process at each stage of the system is very complex, and a purification system for oil-water separation suitable for limited installation locations has not been provided, which has provided several factors that reduce work efficiency.

[0018] Therefore, there was a need for an oil-water separation purification system and its purification method that could efficiently separate and discharge water and oil by providing a step-by-step oil-water separation treatment process suitable for the site, and that could be customized to the installation location of the infrastructure, thereby improving work efficiency and oil-water separation purification performance.

[0019] Therefore, the purpose of the present invention to solve the conventional problems as described above is to provide an oil-water separation purification system that provides a step-by-step oil-water separation treatment process in contaminated water mixed with water and oil, thereby efficiently separating and discharging water and oil for purification.

[0020] Another object of the present invention is to provide an oil-water separation purification system that can automatically induce the oil-water flow according to the oil-water separation treatment process in a natural falling manner to provide work efficiency and process automation.

[0021] Another object of the present invention is to provide an oil-water separation purification system that can efficiently separate and discharge water and oil by providing a step-by-step oil-water separation treatment process suitable for a field installation section.

[0022] Another object of the present invention is to provide an oil-water separation purification system that can be customized to fit the section of a field-based facility, thereby improving work efficiency and oil-water separation purification performance.

[0023] Another object of the present invention is to provide a method for separating and purifying oil and water using an oil-water separation purification system that provides a step-by-step oil-water separation treatment process suitable for the site, thereby efficiently separating and discharging water and oil, and enabling customized construction suitable for the installation site of infrastructure, thereby improving work efficiency and oil-water separation purification performance.

[0024] In order to achieve the above-described object, the present invention provides an oil-water separation purification system installed to separate and purify water and oil mixed in oil-water, comprising: an oil-water storage tank into which oil-water is introduced and stored; a supply pump for discharging and moving the oil-water in the oil-water storage tank; a drum screen for primarily pre-treating various types of sludge in the oil-water supplied from the supply pump; a scum remover for secondarily pre-treating by binary separation of residual sludge and oil-water in the oil-water primarily filtered by the drum screen; an oil-water separator for binary separation of water and oil in the oil-water pre-treated by the scum remover and purifying and discharging the separated water; an inspection tank for checking the degree of turbidity in the water separated and discharged from the oil-water separator; and a drainage pump installed in connection with the bottom of the inspection tank for finally discharging purified water into sewage. The present invention discloses a water separation purification system characterized in that the height difference of the installation equipment from the drum screen to the drainage pump is sequentially different, so as to automatically induce the flow of water from the drum screen to the inspection tank in a natural falling manner.

[0025] In addition, the oil-water separation purification system may be characterized by further comprising: an oil storage tank into which oil-water mixed with water is injected and stored at a predetermined location underground or above ground; and a raw liquid supply pump for pumping oil from the oil storage tank to the oil storage tank.

[0026] In addition, the oil-water separation purification system may be configured to directly introduce oil-water mixed from a sewage pipe into the oil storage tank, and may include a supply pump for discharging and moving the oil-water in the oil storage tank; a drum screen for primarily removing various types of sludge from the oil-water supplied from the supply pump; at least one scum remover installed for secondarily removing residual sludge supplied from the drum screen; and an oil-water separator for separating, purifying, and discharging water and oil from the oil-water supplied from the scum remover; wherein the water separated in the oil-water separator may be configured to be bypassed back toward the sewage pipe by a recovery pump.

[0027] In addition, it may be characterized in that it is configured to further include a scum storage tank installed between the drum screen and the scum remover to collect and store sludge and scum separated and discharged from the drum screen and the scum remover by a screw conveyor.

[0028] In addition, the drum screen comprises: a base frame; an inner tube installed on the inside of the base frame and having a space into which filtered water with sludge filtered out flows; a rotating drum rotatably installed on the upper part of the inner tube to filter out sludge in the flowing water by using a centrifugal force of rotation; a rotating screw formed with a water intake port through which water flows in from one side and installed rotatably together with the rotating drum to discharge sludge forward; a roller driving unit comprising a main roller and an auxiliary roller installed to drive the rotating drum in conjunction; a driving motor for transmitting power to the main roller of the roller driving unit; and an air nozzle installed on the inner tube to remove residual sludge remaining in the rotating drum by spraying it with air. Including, when water flows in from one side of the rotating screw, the rotating drum and the rotating screw rotate simultaneously, the water flowing in through the water suction hole is discharged forward after the sludge is filtered by the rotating screw, and the water from which the sludge is filtered is discharged to the outer periphery of the rotating drum and accommodated in the inner cylinder.

[0029] In addition, the rotary drum may be characterized in that it is composed of a mesh net having a cylindrical mesh structure crossing one end and the other end, and includes a plurality of inner screws formed in a spiral shape corresponding to the blades of the rotary screw, with a constant equal interval maintained along the inner circumference of the mesh net.

[0030] In addition, the scum remover may be characterized by comprising: a support frame supported on the floor; a housing body supported by the support frame, into which flowing water containing water and scum flows in from the bottom and which has a double-structured inner and inner cylinder structure; a water inlet pipe installed from the side of the housing body to the floor to inject flowing water; an air blower installed to the bottom of the housing body to supply air to a ring blower; a steam pipe installed on the inside of the housing body to decompose water and scum in the flowing water into heat; an auxiliary heater panel installed on the inside of the housing body to decompose floating scum into heat again; a water discharge pipe connected to the central inner cylinder of the housing body to discharge purified water from which scum has been filtered; a scraper device driven by a motor installed on the upper side of the housing body to rotate to classify and discharge scum from the surface of the flowing water; and a scum discharge port through which scum classified by the scraper device is discharged.

[0031] In addition, the scum remover may be characterized in that the water is injected into the housing body along the water inlet pipe, and is decomposed into water and scum by bubbles generated from the acid generator and heat generated from the steam pipe, and the scum that has risen is discharged to the scum discharge port through a scraper device that rotates at the top, and purified water from which scum has been removed is purified and discharged through a water discharge pipe.

[0032] In addition, the inner tube of the housing body may be characterized in that a pipe connection hole is formed on one side thereof so that the water discharge pipe passes through it, and the inner tube is further configured to have at least two water distribution holes formed vertically through the bottom surface adjacent to the bottom of the inner tube so that water passes through the inner tube.

[0033] In addition, the oil-water separator comprises a box body provided in the form of a tank with a cover provided on the top; an oil-water inlet into which oil-water mixed with water is injected on one side of the box body; a water outlet through which oil-separated water is discharged on one side opposite the oil-water inlet; a first partition wall portion provided inside the box body at a position close to the oil-water inlet and vertically installed at a position spaced apart from the bottom of the box body so that the injected oil can flow downward; a second partition wall portion installed vertically at a position close to the water outlet inside the box body and spaced apart from the bottom of the box body by a predetermined distance so that the oil-separated water can flow upward from the bottom; a third partition wall portion installed vertically at a position close to the water outlet inside the box body while maintaining a predetermined distance from the second partition wall portion so that water rising from the bottom can flow upward; and an oil blocking plate installed horizontally at a predetermined height between the first partition wall portion and the second partition wall portion. It may be characterized by comprising a bolt-lap oil discharge unit installed on the upper side of the oil blocking plate to discharge only the oil that has been injured; and a heating means installed on the lower side of the oil blocking plate to heat the injected oil to a certain temperature.

[0034] In addition, the bolt-trap oil discharge unit may be characterized by comprising: a housing screw-connected to an upper end of one side of the oil blocking plate; an oil discharge valve having an inner diameter structure with a vertical upper end and an inner diameter structure with a slanted lower end inside the housing; a bolt-trap installed so as to be movable according to the amount of oil drained in accordance with the oil discharge valve and operating to turn the valve on and off; a ball separation prevention net formed to extend in a mesh shape to the lower end of the housing and prevent the bolt-trap from coming off; and an oil discharge pipe that guides the external discharge of oil by the on / off operation of the bolt-trap in the oil discharge valve.

[0035] In addition, the present invention, in order to achieve the above-described object, is a method for separating oil and water using an oil-water separation purification system that separates water and oil mixed in wastewater flowing in from the outside, comprising: an oil storage step of storing the oil-water mixture of water and oil supplied by a supply in an oil storage tank; an oil-water transfer step of discharging and moving the oil in the oil storage tank from the oil-water storage step by a supply pump; a first floating matter removal step of firstly pretreating various floating matters in the oil-water supplied from the supply pump in the oil-water transfer step by a drum screen; a second scum removal step of secondly pretreating the oil-water supplied in the first floating matter removal step by separating residual floating matters and oil-water into two components by a scum remover; an oil-water separation purification step of secondly separating the oil-water flowing in from the second scum removal step into two components by an oil-water separator and discharging the separated water and oil; A method for separating and purifying oil and water can be disclosed, characterized in that it comprises: an inspection step for checking the turbidity of water through an inspection tank in water separated and discharged from the above-mentioned oil and water separation and purification step; and a purification and drainage step for discharging the water finally purified in the inspection step into sewage.

[0036] In addition, it can be characterized in that the installation heights of the devices are sequentially lowered in steps from the above-mentioned water storage stage to the inspection stage, so that the flow of water from the drum screen to the inspection tank is automatically induced in a natural falling manner.

[0037] The present invention can provide an oil-water separation purification system that can efficiently separate and discharge water and oil for purification by providing a step-by-step oil-water separation treatment process in contaminated water mixed with water and oil.

[0038] In addition, the present invention can provide an oil-water separation purification system that can efficiently separate and discharge water and oil by providing a step-by-step oil-water separation treatment process suitable for a field installation section.

[0039] In addition, the present invention has the effect of automatically inducing the flow of water according to the oil-water separation treatment process in a natural falling manner, thereby providing work efficiency and automation of the process.

[0040] In addition, the present invention can provide an oil-water separation purification system that can be customized to fit the section of a field-based facility, thereby improving work efficiency and oil-water separation purification performance.

[0041] In addition, the present invention provides a step-by-step oil-water separation treatment process suitable for the site, thereby efficiently separating and discharging water and oil, and can provide an oil-water separation purification method using an oil-water separation purification system that can improve work efficiency and oil-water separation purification performance by enabling customized construction suitable for the installation site of infrastructure.

[0042] Figures 1 to 9 are examples showing a water separation purification system according to the present invention.

[0043] Figure 1 is an overall example of a water separation purification system according to the present invention.

[0044] Figure 2 is another example of installation according to the oil-water separation purification system of the present invention.

[0045] Figure 3 is another example of installation according to the oil-water separation purification system of the present invention.

[0046] Figure 4 is a front and plan view showing a drum screen according to the oil-water separation purification system of the present invention.

[0047] Figure 5 is an exploded view showing a scum remover according to the oil-water separation purification system of the present invention.

[0048] Figure 6 is a side cross-sectional view of a scum remover according to the present invention.

[0049] Figure 7 is another cross-sectional view of Figure 6;

[0050] Figure 8 is a cross-sectional view showing an oil-water separator according to the oil-water separation purification system of the present invention.

[0051] Fig. 9 is a cross-sectional view showing an example of a ball trap oil discharge part according to the oil-water separator of Fig. 8.

[0052] Figure 10 is a process diagram showing a water separation purification method according to the present invention.

[0053]

[0054] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0055] The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and the present embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform a person having ordinary skill in the art of the scope of the invention.

[0056] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when assigning reference numerals to components in each drawing, it should be noted that, where possible, identical components are assigned the same reference numerals even if they appear in different drawings. Furthermore, when describing the present invention, if a detailed description of a related, well-known structure or function is judged to obscure the gist of the present invention, such detailed description will be omitted.

[0057] The features and advantages of the present invention will become more apparent from the detailed description of the following preferred embodiments based on the accompanying drawings.

[0058] Additionally, the terms and words used in this specification and claims are used only to describe specific embodiments and are not intended to limit the present invention.

[0059] For example, a singular expression includes a plural expression unless the context clearly indicates otherwise. In addition, it should be understood that terms such as "comprises," "includes," or "has" specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0060] Furthermore, when we say that a layer, membrane, region, board, or other part is "above" another part, this includes not only cases where it is "directly above" the other part, but also cases where there are other parts in between. Conversely, when we say that a layer, membrane, region, board, or other part is "beneath" another part, this includes not only cases where it is "directly below" the other part, but also cases where there are other parts in between.

[0061] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another.

[0062] Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same components, and only different parts are mainly described without duplication as much as possible for clarity.

[0063] Figures 1 to 6 are examples showing a water separation purification system according to the present invention.

[0064] Referring to FIGS. 1 to 6, the oil-water separation purification system according to the present invention separates water and oil mixed in oil-water and discharges the separated water and oil, and comprises: an oil-water storage tank (100) in which oil-water is stored; a supply pump (200) for discharging and moving the oil-water in the oil-water storage tank (100); a drum screen (300) for primarily pre-treating various types of sludge in the oil-water fed from the supply pump (200); a scum remover (400) for secondarily pre-treating the remaining sludge and oil-water in the oil-water filtered from the drum screen (300) by separating them into two components; an oil-water separator (500) for secondarily separating water and oil from the oil-water pre-treated from the scum remover (400) and purifying and discharging the separated water and oil; an inspection tank (600) for checking the degree of turbidity in the water separated and discharged from the oil-water separator (500); And, it is configured to include a drainage pump (700) that is installed in connection with the bottom of the inspection tank (600) and discharges the purified water into the sewer.

[0065] Preferably, the height difference (P) of the installation equipment from the drum screen (300) to the drainage pump (700) is configured to be sequentially different, so that the flow of water from the drum screen (300) to the inspection tank (600) can be automatically induced in a natural falling manner.

[0066] The above-mentioned water storage tank (100) is a box-shaped housing structure in which the incoming water is stored, and the bottom can be configured to have a slope (R) to enable smooth discharge movement of the water.

[0067] On the other hand, as shown in FIG. 2, the oil storage tank (100) may be configured in a manner of connection by further including a water storage tank (1100) in which oil and water are mixed and stored at a certain location underground or above ground; and a raw material supply pump (1200) that pumps oil from the oil storage tank (1100) to the oil storage tank (100).

[0068] On the other hand, referring to FIG. 3, the oil-water storage tank (100) is configured to directly introduce oil-water mixed with water from a sewage pipe, and includes a supply pump (200) for discharging and moving the oil-water storage tank (100); a drum screen (300) for primarily removing various types of sludge from the oil-water supplied from the supply pump (200); at least one scum remover (400) installed for secondarily removing the residual sludge supplied from the drum screen (300); and an oil-water separator (500) for separating, purifying, and discharging water and oil from the oil-water supplied from the scum remover (400). However, the water separated in the oil-water separator (500) may be configured to be bypassed back toward the sewage pipe (10) by a recovery pump (1300).

[0069] Here, the raw water, which is the raw water flowing in directly from underground or above ground, is stored and pumped using the raw water supply pump (1200) and injected into the water retention tank (100). In addition, it is possible to install in sections according to the conditions of installation on a site with a large amount of daily water discharge or a large-scale site, and the water supplied directly from the sewer pipe along the sewer line can be bypassed to the sewer pipe through the last recovery pump (1300) and the process can be repeated to match the water purification performance to the injected capacity.

[0070] Meanwhile, it may be configured to further include a scum storage tank (1400) installed between the drum screen (300) and the scum remover (400) to collect and store sludge and scum separated and discharged from the drum screen (300) and the scum remover (400) by a screw conveyor (1410).

[0071] The above supply pump (200) is a device that pumps the water of the above-mentioned water storage tank (100) by pumping the water of the above-mentioned drum screen (300) with pressure, has a motor pump structure, and is installed on the same line as the bottom height of the above-mentioned water storage tank (100), and may be installed on the same line as or lower than the drum screen (300). In this case, when the supply pump is installed at the same height as the drum screen (300), it may be installed so as to provide conditions for inducing free fall from the water storage tank.

[0072] The drum screen (300) comprises: a base frame (310); an inner tube (320) installed inside the base frame (310) and having a space into which filtered water with sludge filtered out flows; a rotary drum (330) rotatably installed on the upper portion of the inner tube (320) to filter out sludge in the flowing water by using a centrifugal force of rotation; a rotary screw (340) having a fluid intake port (341) formed on one side into which fluid flows in and installed rotatably together with the rotary drum (330) to discharge sludge forward; a roller driving unit (350) composed of a main roller and an auxiliary roller installed to drive the rotary drum (330) in conjunction; a driving motor (360) for transmitting power to the main roller of the roller driving unit (350); And, it can be configured to include an air nozzle (380) installed in the inner tube (320) to remove residual sludge remaining in the rotary drum (330) by spraying it with air.

[0073] Here, when water flows in from one side of the rotating screw (340), the rotating drum (330) and the rotating screw (340) rotate simultaneously, and the water flowing in through the water intake port (341) is discharged forward after the sludge is filtered by the rotating screw (340), and the water with the sludge filtered out is discharged to the outer periphery of the rotating drum (330) and accommodated in the inner cylinder (320).

[0074] Meanwhile, the above-mentioned rotary drum (330) is composed of a mesh net (331) having a cylindrical mesh structure that crosses one end and the other end, and can be composed of an inner screw (332) that is formed by protruding in a spiral shape corresponding to the blades of the above-mentioned rotary screw, with a constant equal interval maintained along the inner circumference of the mesh net (331).

[0075] The scum remover (400) comprises: a support frame (410) supported on the floor; a housing body (420) supported by the support frame (410), into which water containing water and scum flows in from the bottom and which has a double-structured inner tube (421) and inner tube (423) structure; a water inlet pipe (430) installed through the side of the housing body (420) to the floor to inject water; an air blower (440) installed through the bottom of the housing body (420) to supply air to a ring blower; a steam pipe (450) installed inside the housing body (420) to decompose water and scum into heat in the water; an auxiliary heater panel (460) installed inside the housing body (420) to decompose floating scum into heat again; It can be configured to include a water discharge pipe (470) connected to the central inner tube (423) of the housing body (420) for discharging purified water from which scum has been filtered; a scraper device (480) that is driven by a motor on the upper side of the housing body (420) and rotates to classify and discharge scum from the surface of the water; and a scum discharge port (490) through which scum classified by the scraper device (480) is discharged.

[0076] In addition, the inner tube (423) of the housing body (420) may be configured to have a pipe connection hole (423a) formed on one side thereof so that the water discharge pipe (470) passes through it, and the inner tube (423) may further have at least two water distribution holes (423b) formed vertically through the bottom surface adjacent to the bottom of the inner tube (421) so that water passes through the inner tube. At this time, water flowing in through the water distribution holes (423b) may be discharged through the water discharge pipe (470) at a certain height while water separated from scum rises from the bottom. In other words, a structure may be provided in which scum is filtered and discharged from the top, and water is discharged through the inner tube through the bottom to the water discharge pipe, thereby separating scum and water in a dual manner.

[0077] Preferably, the scum remover (400) can be configured so that water is injected into the housing body (420) along the water inlet pipe (430), bubbles generated from the acid generator (440) and heat generated from the steam pipe (450) are decomposed into water and scum, and the scum that has risen through the scraper device (480) rotating at the top is discharged to the scum discharge port (490), and purified water from which scum has been removed is purified and discharged through the water discharge pipe (470).

[0078] The scraper device (480) is a device that is driven by a motor on the upper side of the housing body (420) to rotate to classify scum from the surface of floating matter and discharge the scum through the scum discharge port (490), and comprises: a support plate (481) installed on the upper side of the housing body (420); a drive motor (482) provided on one side of the support plate (481); a drive shaft (483) axially coupled to the drive motor (482); a rotation shaft (485) that rotates in connection with the drive shaft (483) to filter out scum floating on the upper side of the housing body (420); a guide rotation rod (486) that is installed across the rotation shaft (485); and a rotation roller (487) that is installed on both ends of the guide rotation rod (486) to guide rotation along the upper circumference of the housing body (420) along a rotation radius. It can be configured to include a scum removal plate (489) connected to and installed at the lower end of the above guide rotary shaft (486) to remove the injured scum.

[0079] Here, the support plate (481) can be assembled horizontally and vertically, respectively, and can be fixedly installed by bolting on the upper circumference or side of the housing body (420).

[0080] Additionally, the drive shaft (483) and the rotation shaft (485) may be provided with a bevel gear structure for smooth gear operation.

[0081] Additionally, various electronic control devices for driving the motor can be installed on the support plate (481).

[0082] Preferably, the support plate (481) can be configured to be covered with a finishing cover so that it can be protected.

[0083] In addition, the scum removal plate (489) may be installed so that the height can be adjusted in response to the water surface height of the scum by providing a height adjustment means (not shown) at the lower end to adjust the height of the scum removal plate (489) according to the water surface height at which the scum is located.

[0084] Meanwhile, the driving motor (482), driving shaft (483) and rotation shaft (485) may be configured to be capable of rotational operation on the same axis that is installed vertically.

[0085] The above oil-water separator (500) comprises a box body (510) in the form of a tank, which has a cover provided on the top, an oil-water inlet (511) into which oil-water mixed with water is injected on one side, and a water outlet (513) through which oil-separated water is discharged on the opposite side; a handle strainer (520) which is installed in conjunction with and installed near the oil-water inlet (511) of the box body (510) to filter out foreign substances from the incoming oil-water; a first partition wall portion (530) which is installed inside the box body (510) at a position close to the oil-water inlet (511) and is vertically installed to a position spaced from the bottom of the box body (510) so that the injected oil-water can flow downward; A second partition wall (550) formed vertically, at a predetermined distance from the bottom of the box body (510) and close to the water discharge port (513) on the inside of the box body (510), so that separated oil water can flow from the bottom to the top; A third partition wall (560) formed vertically, at a predetermined distance from the second partition wall (550) and close to the water discharge port (513) on the inside of the box body (510), so that water rising from the bottom can be carried over; An oil blocking plate (570) horizontally installed at a predetermined height between the first partition wall (530) and the second partition wall (550); A bolt-lap oil discharge unit (580) installed in combination with one upper side of the oil blocking plate (570) so that only the oil that has floated is discharged; A heating means (590) installed below the oil blocking plate (570) to heat the injected oil to a predetermined temperature; It can be configured to include.

[0086] In addition, the bottom of the box body (510) can be configured to have a slope (511) so that residual sludge accumulated on the bottom can be naturally discharged through a valve.

[0087] In addition, the above-mentioned handle strainer (520) may be configured as a box-shaped mesh structure, including a handle (523) on the upper side for holding the hand when removing foreign substances; and a prevention cover (525) formed on the upper side where the handle (521) is located to prevent water from splashing upwards due to a sudden inflow of water.

[0088] In addition, the oil blocking plate (570) can be formed to be inclined upward toward the bolt-trap oil discharge portion (580) so that the oil can be concentrated toward the bolt-trap oil discharge portion.

[0089] In addition, the bolt-trap oil discharge unit (580) may be configured to include a housing (581) that is screw-connected to the upper end of one side of the oil blocking plate (570); an oil discharge valve (583) that has a vertical inner diameter (583a) structure at the upper end and a slanted inner diameter (583b) structure at the lower end of the housing (581); a bolt-trap (585) that is positioned at the lower end of the oil discharge valve (583) and is movably installed according to the amount of oil to be drained and operates to turn the oil discharge valve on and off; a ball separation prevention net (587) that is formed to extend in a wire mesh shape from the lower end of the housing (581) and prevent the bolt-trap from coming off; and an oil discharge port (589) that is formed to be slanted so as to guide the external discharge of oil by the on / off operation of the bolt-trap (585) in the oil discharge valve (583).

[0090] Here, the ball release prevention net (587) may be in the form of a wire mesh or a mesh, and any structure and form that allows water to flow freely and prevents the bolt wrap from coming off is sufficient.

[0091] Meanwhile, the heating means (590) is installed at a position close to the first bulkhead (530) at the bottom of the oil blocking plate (570) to heat the injected oil to a certain temperature and maintain that temperature to prevent the animal oil from solidifying and also to prevent the oil discharge area from being clogged. It is operated by an external power source of the main body, and a heat lamp or heating pipe structure is sufficient, and a double structure with one heat lamp and the other heating pipe can also be installed.

[0092]

[0093] Hereinafter, the operation and effect of the oil-water separation purification system according to the present invention and the oil-water separation purification method utilizing the purification system will be described. The following description follows the structural description above.

[0094] A method for separating oil and water using an oil-water separation purification system that separates water and oil mixed in wastewater flowing in from outside can be provided.

[0095] The oil-water separation purification method according to the present invention may be composed of a process including an oil-water storage step (S100); an oil-water transport step (S200); a primary floating matter removal step (S300); a secondary scum removal step (S400); an oil-water separation purification step (S500); an inspection step (S600); and a purification drainage step (S700).

[0096] <Water storage stage>

[0097] The raw liquid mixed with water and oil by the supply is stored in the oil storage tank (100) (S100).

[0098] <Water transport stage>

[0099] From the above-mentioned water storage step (S100), the water in the water storage tank (100) is discharged and moved by the supply pump (200) (S200).

[0100] <1st floating matter removal stage>

[0101] In the above-mentioned water transport step (S200), the water supplied from the supply pump (200) is first pretreated by a drum screen (300) to remove various floating substances (S300).

[0102] <Second Scum Removal Stage>

[0103] In the first floating matter removal step (S300), the supplied water is separated into residual floating matter (scum) and water by a scum remover (400) and secondarily pretreated to remove scum (S400);

[0104] <Oil-water separation purification stage>

[0105] The oil flowing in from the above second scum removal step (S400) is separated and discharged as water and oil by an oil-water separator (500) to perform oil-water separation purification (S500).

[0106] <Inspection phase>

[0107] An inspection is conducted to check the degree of turbidity in the water separated and discharged from the above water separation purification step (S500) (S600).

[0108] <Purification discharge stage>

[0109] In the above inspection step (S600), purified water is finally discharged into the sewer (S700).

[0110] First, in the above-mentioned water storage step (S100), wastewater or treated water (flow) mixed with water and oil is introduced and stored, and then immediately moved to the next step flow process.

[0111] Here, a process may be further provided that includes using a water storage tank (1100) in which a mixture of water and oil is injected and stored at a certain location underground or above ground according to the degree of the water capacity; and a raw material supply pump (1200) that pumps the water from the water storage tank (1100) to the water storage tank (100).

[0112] Next, in the above-mentioned water transfer step (S200), the water is transferred to the drum screen (300) using the supply pump (200).

[0113] Then, in the first floating matter removal step (S300), the supplied water is received through the drum screen (300) and foreign substances and sludge, etc. are first pre-filtered from the water.

[0114] In addition, in the second scum removal step (S400), the first pre-treated water is received through the scum remover (400) and pre-treated and filtered again for the second time. At this time, the scum remover (400) can be installed in parallel or in series with the first scum remover (400A) and the second scum remover (400B) in comparison to the inflow water volume.

[0115] Preferably, in the subsequent scum removal step, water and oil can be configured to be separated and discharged separately through a binary process using specific gravity.

[0116] Next, in the above oil-water separation purification step (S500), the water (oil) pretreated in the scum removal step is supplied to the oil-water separator (500) and is separated and discharged as water and oil through pretreatment using specific gravity and heat again.

[0117] Here, depending on the site with a large daily water discharge volume or the installation conditions of a large-scale site, the water supplied directly from the sewer pipe along the sewer line may be bypassed to the sewer pipe through the last recovery pump (1300) and the process repeated to increase the water purification performance relative to the amount of input.

[0118] Finally, only the final separated water is checked for turbidity and then purified and discharged.

[0119] Preferably, the installation heights of the devices are sequentially lowered from the above-mentioned water storage stage to the inspection stage, so that the flow of water from the drum screen to the inspection tank can be automatically induced in a natural falling manner.

[0120] As described above, the oil-water separation purification system according to the present invention and the oil-water separation purification method using the same provide a step-by-step oil-water separation treatment process in contaminated water mixed with water and oil to efficiently separate and discharge the water and oil and purify them, and provide a step-by-step oil-water separation treatment process suitable for the on-site installation section to efficiently separate and discharge the water and oil, and provide the effect of automatically inducing the oil-water flow according to the oil-water separation treatment process in a natural falling manner to provide work efficiency and automation of the process.

[0121] The present invention is a device that can collect more than 99% of vegetable and animal oils discarded in the kitchen by automatically separating the oil with a separate oil discharge unit, and the content of vegetable and animal fats in the discharged water is 20 mg / L or less, and the moisture content of the collected oil is also less than 1%, so it has a high purity and high recycling value. According to the Enforcement Decree of the Sewerage Act, a screen with an effective gap of 10 mm or less must be installed at the inlet where solid substances flow in, and a grease blocking device must be installed at the inlet where fats flow in. According to the Enforcement Decree of the Water Environment Conservation Act, the allowable discharge standard for vegetable and animal fats among n-hexane extracts is 30 mg / L.

[0122] Although the present invention has been illustrated and described with reference to preferred embodiments as described above, it is not limited to the above-described embodiments, and various modifications and variations are possible within the scope equivalent to the technical idea of ​​the present invention and the scope of the patent claims to be described below by a person having ordinary skill in the art without departing from the spirit of the present invention.

[0123]

[0124] [Explanation of symbols]

[0125] 100: Water storage tank 200: Supply pump

[0126] 300: Drum screen 310: Base frame

[0127] 320: inner tube 330: rotating drum

[0128] 340: Rotating screw 350: Roller drive unit

[0129] 360: Air Nozzle 400: Scum Remover

[0130] 410: Support frame 420: Housing body

[0131] 430: Water inlet pipe 440: Acid generator

[0132] 450: Steam pipe 460: Auxiliary heater panel

[0133] 470: Water discharge pipe 480: Scraper device

[0134] 490: Scum discharge port 500: Oil-water separator

[0135] 510: Box body 520: Water inlet

[0136] 530: Water outlet 540: First bulkhead

[0137] 550: Second bulkhead 560: Third bulkhead

[0138] 570: Oil blocking plate 580: Ball trap oil discharge part

[0139] 590: Heating means 600: Inspection tank

[0140] 700: Drainage pump 1100: Water storage tank

[0141] 1200: Raw material supply pump 1300: Recovery pump

[0142] 1400: Scum storage tank

Claims

1. An oil-water separation purification system comprising: a water storage tank into which oil is introduced and stored; a supply pump for discharging and moving the oil in the water storage tank; a drum screen for primarily pre-treating various types of sludge in the oil-water supplied from the supply pump; a scum remover for secondarily pre-treating by separating residual sludge and oil from the oil-water filtered from the drum screen; an oil-water separator for separately separating water and oil from the oil-water pre-treated from the scum remover and discharging the separated and purified water; an inspection tank for checking the degree of turbidity in the water separated and discharged from the oil-water separator; and a drainage pump connected to the bottom of the inspection tank for finally discharging the purified water into sewage; and installed to mutually separate and purify water and oil mixed in the oil-water, The height difference of the installation equipment from the drum screen to the drainage pump is configured to be sequentially different, so that the flow of water from the drum screen to the inspection tank is automatically induced in a natural falling manner. The scum remover is characterized in that it comprises a support frame supported on the floor; a housing body supported by the support frame, into which flowing water containing water and scum flows in from the bottom and which has a double-structured inner and inner cylinder structure inside; a water inlet pipe installed through the side of the housing body to the floor to inject flowing water; an air blower installed through the bottom of the housing body to supply air to a ring blower; a steam pipe installed inside the housing body to decompose water and scum in the flowing water into heat; an auxiliary heater panel installed inside the housing body to decompose floating scum into heat again; a water discharge pipe connected to the central inner cylinder of the housing body to discharge purified water from which scum has been filtered; a scraper device installed on the upper side of the housing body to be driven by a motor and rotate to classify and discharge scum from the surface of the flowing water; and a scum discharge port through which scum classified by the scraper device is discharged.

2. In paragraph 1, The above drum screen is A filtering device comprising: a base frame; an inner drum installed inside the base frame and having a space into which filtered water with sludge filtered out flows; a rotary drum rotatably installed at the top of the inner drum to filter out sludge in the flowing water by using a centrifugal force of rotation; a rotary screw having a fluid intake port formed at one side into which fluid flows in and installed to be rotatable together with the rotary drum to discharge sludge forward; a roller driving unit comprising a main roller and an auxiliary roller installed to drive the rotary drum in conjunction; a driving motor for transmitting power to the main roller of the roller driving unit; and an air nozzle installed in the inner drum to remove residual sludge remaining in the rotary drum by spraying it with air; An oil-water separation purification system characterized in that when water flows in from one side of the above-mentioned rotating screw, the rotating drum and the rotating screw rotate simultaneously, the water flowing in through the water intake port has sludge filtered by the above-mentioned rotating screw and is discharged forward, and the water with the sludge filtered is discharged to the outer periphery of the rotating drum and is received in the above-mentioned inner cylinder.

3. In paragraph 1, The scum remover is characterized in that the oil-water separation purification system is configured such that the oil-water is injected into the housing body through the oil-water inlet pipe, and is decomposed into water and scum by bubbles generated from the acid generator and heat generated from the steam pipe, and the scum that has risen is discharged to the scum discharge port through a scraper device that rotates at the top, and the purified water from which the scum has been removed is purified and discharged through a water discharge pipe.

4. In paragraph 1, The inner tube of the above housing body has a pipe connection hole formed on one side thereof through which the water discharge pipe passes, A water separation purification system characterized in that the inner tube is configured to further have at least two water distribution holes formed vertically through the bottom surface adjacent to the bottom of the inner tube to allow water to pass through the inner tube.

5. In the first paragraph, the oil-water separator A box body provided with a cover on the top and provided in the form of a water tank; an oil inlet into which oil mixed with water is injected on one side of the box body; a water discharge port through which oil separated from the water is discharged on one side opposite the oil inlet port; a first partition wall portion provided inside the box body at a position close to the oil inlet and vertically installed at a position spaced apart from the bottom of the box body so that the injected oil can flow downward; a second partition wall portion installed vertically at a position close to the water discharge port inside the box body and spaced apart from the bottom of the box body by a predetermined distance so that the oil separated water can flow upward from the bottom; a third partition wall portion installed vertically at a position close to the water discharge port inside the box body and maintaining a predetermined distance from the second partition wall portion so that water rising from the bottom can be carried over; an oil blocking plate installed horizontally at a predetermined height between the first partition wall portion and the second partition wall portion; It is composed of a bolt-lap oil discharge unit installed on the upper side of the oil blocking plate to discharge only the oil that has been injured; and a heating means installed on the lower side of the oil blocking plate to heat the injected oil to a certain temperature; The above bolt-trap oil discharge unit is characterized in that it further comprises a housing screw-connected to the upper end of one side of the oil blocking plate; an oil discharge valve having an inner diameter structure with a vertical upper end and an inner diameter structure with a slanted lower end inside the housing; a bolt-trap installed to be movable according to the amount of oil drained in accordance with the oil discharge valve and operating to turn the valve on and off; a ball separation prevention net formed to extend in a mesh shape to the lower end of the housing and prevent the bolt-trap from coming off; and an oil discharge pipe that guides the external discharge of oil by the on / off operation of the bolt-trap in the oil discharge valve.

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