Oil collecting and liquid supplying equipment

Abstract

The invention discloses an oil collecting and liquid supplying device, wherein a water purification module comprises a paper bag filter for primary filtration, an aeration component, a floating oil collecting component, an oil-water separation component for separating oil collected by the floating oil collecting component from water, a multi-purpose filtering component and a purification box for secondary filtration, wherein a primary filtering pool and a secondary filtering pool are arranged in the purification box, an overflow pipe is arranged in the primary filtering pool, an overflow outlet of the overflow pipe is connected with the upper end of the secondary filtering pool, and the other end of the overflow pipe is close to the inner bottom surface of the primary filtering pool; a pump body component transports waste liquid in the collecting pool to the paper bag filter, and liquid filtered by the paper bag filter enters the primary filtering pool, and then aeration, sterilization and purification are performed by the aeration component, and then floating oil foam in the primary filtering pool is collected by the floating oil collecting component, and the floating oil collecting component and the oil-water separation component cooperate with each other to separate the skimmed floating oil from water again, and finely filter the cutting fluid, thereby improving the quality of the cutting fluid.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid treatment, in particular to an oil collecting and liquid supplying device. Background Art

[0002] Cutting fluid is increasingly used in the machining industry, and its role cannot be ignored. With the extensive use of cutting fluid, how to deal with waste cutting fluid has become an urgent problem to be solved. Waste cutting fluid contains harmful substances such as metal particles, grease and mold. If it is discharged at will, it will cause serious pollution to the environment. To this end, technicians in related fields have developed a cutting fluid purification circulation system to solve the above problems.

[0003] The existing cutting fluid purification circulation system can achieve purification without stopping the machine operation. The collecting chamber is placed in the middle of the separation tank. The cutting fluid enters the separation tank, the waste oil floats up, and the cutting fluid sinks to achieve oil-liquid separation. The waste oil floats to the upper side of the collecting chamber for collection and removal, and is finally discharged from the oil drain pipe. The cutting fluid after sinking is disinfected in an ultraviolet sterilizer to complete the purification process. However, the cutting fluid also contains impurities such as oil sludge and pollutants. These purification structures cannot perform fine purification on these, and the waste oil skimmed off in the first pass still contains more cutting fluid. This type of purification is not fine enough. Summary of the invention

[0004] The invention solves the above-mentioned technical problems that the cutting fluid still contains impurities such as oil sludge and pollutants and cannot be finely purified, and the waste oil skimmed off in the first pass still contains a lot of cutting fluid and the purification is not fine enough.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: an oil collecting and liquid supplying device, comprising a collecting pool for collecting waste liquid in a workshop, a pump body assembly, a water purification module, and a constant pressure liquid supplying module;

[0006] The water purification module includes a paper bag filter for primary filtration, an aeration component, an oil floating collection component, an oil-water separation component for separating the oil collected by the oil floating collection component, a multi-purpose filter component for secondary filtration, and a purification box, which can also be a purification tank, located on the ground or underground;

[0007] A primary filter pool and a secondary filter pool are provided in the purification box. An overflow pipe is provided in the primary filter pool. The overflow outlet of the overflow pipe is connected to the upper end of the secondary filter pool, and the other end of the overflow pipe is close to the bottom surface of the primary filter pool.

[0008] The pump body assembly transports the waste liquid in the collection tank to the paper bag filter. The liquid filtered by the paper bag filter enters the primary filter tank. Then, the aeration assembly aerates the liquid to fully mix the floating oil and accelerate the separation of water and oil. The floating oil foam in the primary filter tank is then collected by the floating oil collection assembly.

[0009] The multi-purpose filter component filters the liquid purified in the primary filter tank for a second time and then transports it to the secondary filter tank to ensure the cleanliness of the purified oil. The constant pressure liquid supply module supplies the filtered liquid in the secondary filter tank at a constant pressure to keep the water supply pressure constant, so as to maintain a balance between water supply and water use.

[0010] The oil-water separation component includes a separation box with two filter chambers, an oil scraper, a buffer elbow, a small aeration component capable of adjusting the air flow rate and improving the separation efficiency, and a filter screen plate;

[0011] A liquid separation port is provided between the two filter chambers of the separation box, and the liquid separation port connects the two filter chambers. One end of the buffer elbow is installed at the upper end of one of the filter chambers of the separation box, and the other end is used to draw the floating oil collected in the floating oil collection component into the separation box for oil-water separation through connecting pipes, diaphragm pumps and other structures; the filter screen is installed in the filter chamber where the buffer elbow is installed, and is lower than the liquid separation port and the buffer elbow, and the liquid separation port and the buffer elbow are located at the same height; the upper end of the small aeration component is installed on the filter screen, and the small aeration component is used to improve the oil-liquid separation efficiency.

[0012] Furthermore, the aeration assembly includes an ozone inlet pipe and an aerator located in the purification box. The ozone inlet pipe transports ozone to the aerator. The aerator is a disc aerator, and the number of the disc aerators can be appropriately set according to the capacity of the purification box.

[0013] Furthermore, the floating oil collection assembly includes a mounting rod, a linear bearing, a float connector, a plurality of floats, a collection bucket, and a mounting bracket. The plurality of floats are installed outside the collection bucket to ensure that the collection bucket is located on the oil-water separation interface. The linear bearing is sleeved on the mounting rod, and the mounting bracket is fixed outside the linear bearing. The length of the mounting bracket can be longer so that the collection bucket is located in the center of the liquid, and the floating oil collection assembly is installed in the purification box. The linear bearing can move up and down in a straight line to prevent the float from running off to a position that is not conducive to collecting floating oil. The float connector is installed above the opening of the collection bucket through an interval bracket, and the mounting rod is fixed on the float connector. There is liquid entering the space between the float connector and the collection bucket, and the floating oil enters the collection bucket.

[0014] Furthermore, the pump body assembly includes at least two first submersible pumps, and the first submersible pumps transport the liquid in the collection tank to the input port of the paper bag filter.

[0015] Furthermore, the multi-purpose filtering assembly includes a plurality of bag filters connected in parallel through pipelines and a third submersible pump for conveying liquid to the bag filters. The third submersible pump is located in the primary filtering tank, and the water filtered by the bag filters is conveyed to the secondary filtering tank through pipelines.

[0016] Furthermore, the small aeration assembly includes an aeration pipe, a filter screen plate extends from the upper end of the aeration pipe, and the upper surface is flush, and long strip air outlets are provided at both the front and rear ends of the aeration pipe. An adjusting piston that can move up and down and seal the aeration pipe is provided in the aeration pipe, and a threaded rod is installed on the upper end of the adjusting piston. A nut threadedly connected to the threaded rod is provided on the separation box, and a handwheel is provided at the upper end of the threaded rod outside the separation box; the aeration pipe extends from the separation box at its lower end and is connected to a reducer, which increases the pressure difference and provides suction to the fluid, and the other end of the reducer is connected to a pipe connector, which is connected to the ozone delivery pipe through the pipe connector.

[0017] Furthermore, it also includes a collection trolley for collecting impurities filtered by the paper bag filter.

[0018] Furthermore, a concentration detector and a pH detector are provided in the secondary filtration tank.

[0019] Furthermore, the secondary filter tank is provided with a water supply pipe, and a water supply valve is provided on the water supply pipe.

[0020] Furthermore, it also includes a water outlet box outside the filter chamber of the separation box equipped with the oil scraper, the upper end of the water outlet box is open, and a water outlet pipe with an outlet facing upward is provided in the water outlet box. The water inlet of the water outlet pipe is connected to the lower end of the filter chamber of the separation box equipped with the oil scraper through a bent pipe, and the water outlet of the water outlet pipe is lower than the upper surface of the water outlet box opening.

[0021] The advantages of the present invention compared with the prior art are:

[0022] The product of the present invention can perform integrated fine purification of cutting fluid. Waste cutting fluid collected from the workshop is filtered through the paper bag filter, aeration component, multi-purpose filter component and other structures of the product structure of the present invention, and impurities and oil pollution are purified layer by layer, thereby achieving fine filtration of the cutting fluid and improving the quality of the purified cutting fluid.

[0023] The floating oil collection component fully collects the floating oil and foam, which will inevitably bring in the cutting fluid, so the oil-water separation component is customized. They work together to separate the skimmed floating oil again, so as to accurately separate the waste oil and cutting fluid. The separated cutting fluid enters the primary filter tank for purification, which can fully purify the collected waste liquid;

[0024] The product of the present invention can fully purify the cutting fluid, and the purified cutting fluid is of high quality, which reduces human resources and labor intensity. The recovered cutting fluid is free of bacteria, odor and impurities, and the purified cutting fluid can be effectively recycled without causing any impact on the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of an oil collecting and liquid supplying device of the present invention.

[0026] Figure 2 The present invention is a schematic diagram of the structure of a purification box of an oil collecting and liquid supplying device.

[0027] Figure 3 The present invention is a schematic diagram of the structure of a floating oil collection component of an oil collection and liquid supply device.

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of an oil-water separation component of an oil collecting and liquid supplying device of the present invention.

[0029] Figure 5 The present invention is a schematic diagram of the top view of the structure of an oil-water separation component of an oil collecting and liquid supplying device.

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of a small aeration component of an oil collecting and liquid supplying device of the present invention.

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of a purification box of an oil collecting and liquid supplying device of the present invention.

[0032] Figure 8 The present invention is a schematic diagram of an oil collecting and liquid supply processing flow of an oil collecting and liquid supply device.

[0033] As shown in the figure: 1. Collection tank, 2. Pump assembly, 3. Water purification module, 5. Constant pressure liquid supply module, 6. Collection trolley, 7. Concentration detector, 8. PH detector,

[0034] 2.1. The first submersible pump,

[0035] 3.1, paper bag filter, 3.2, aeration assembly, 3.3, floating oil collection assembly, 3.4, multi-purpose filter assembly, 3.5, purification box, 3.6, oil-water separation assembly,

[0036] 3.32, mounting rod, 3.33, linear bearing, 3.34, float connector, 3.35, float, 3.36, collection bucket, 3.37, mounting bracket, 3.38, bracket,

[0037] 3.41, bag filter, 3.42, third submersible pump,

[0038] 3.52, overflow pipe, 3.511, primary filter tank, 3.512, secondary filter tank,

[0039] 3.61, separation box, 3.62, oil scraper, 3.63, buffer elbow, 3.64, small aeration component, 3.65, filter screen, 3.66, reducer, 3.67, pipe connector, 3.611, filter chamber, 3.612, liquid separation port,

[0040] 3.647, air outlet, 3.648, adjusting piston, 3.643, threaded rod, 3.644, nut, 3.645, rotating hand wheel, 3.646, aeration pipe, 3.66, reducer, 3.67, pipe connector,

[0041] 3.641, ozone inlet pipe, 3.642, aerator,

[0042] 3.7, water outlet box, 3.8, water outlet pipe, 3.613, elbow,

[0043] 5.1. Water supply pipe, 5.2. Water supply valve. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0047] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] In combination with all the drawings, an oil collecting and liquid supplying device includes a collecting tank 1 for collecting waste liquid in a workshop, a pump body assembly 2 which is easy to control and is located near the collecting tank 1, a water purification module 3, and a constant pressure liquid supply module 5. The constant pressure liquid supply module 5 is a prior art and will not be described here.

[0049] The water purification module 3 includes a paper bag filter 3.1 for primary filtration, an aeration component 3.2, an oil floating collection component 3.3, an oil-water separation component 3.6 for separating the oil collected by the oil floating collection component 3.3, a multi-purpose filter component 3.4 for secondary filtration, and a purification box 3.5;

[0050] A primary filter pool 3.511 and a secondary filter pool 3.512 are provided in the purification box 3.5. An overflow pipe 3.52 is installed in the primary filter pool 3.511. The overflow outlet of the overflow pipe 3.52 is connected to the upper end of the secondary filter pool 3.512.

[0051] A fence is set at the upper edge of the purification box 3.5, and a ladder is provided on the purification box 3.5 to facilitate maintenance. The main structures of the paper bag filter 3.1 and the multi-purpose filter assembly 3.4 are installed on the purification box 3.5, and the upper and lower structures are arranged to reasonably utilize the space;

[0052] The pump assembly 2 includes at least two first submersible pumps 2.1, which transport the liquid in the collection tank 1 to the input port of the paper bag filter 3.1. The liquid filtered by the paper bag filter 3.1 enters the primary filter tank 3.511, and then is aerated by the aeration assembly 3.2 for oil-water separation. The floating oil foam in the secondary filter tank 3.511 is collected by the floating oil collection assembly 3.3.

[0053] The multi-purpose filter component 3.4 filters the liquid purified by the primary filter pool 3.511 for a second time and then transports it to the secondary filter pool 3.512 to ensure that the purified cutting fluid is free of bacteria and odor. The constant pressure liquid supply module 5 supplies the filtered liquid in the secondary filter pool 3.512 at a constant pressure to keep the water supply pressure constant, so as to maintain a balance between water supply and water use.

[0054] Specifically, the oil-water separation component 3.6 is composed of a separation box 3.61 with two filter chambers 3.611, an oil scraper 3.62, a buffer elbow 3.63, a small aeration component 3.64 capable of adjusting the air flow rate and improving the separation efficiency, and a filter screen 3.65, which enhances the oil-water separation efficiency and makes the oil-water separation faster. A floating oil collection barrel for collecting the waste oil finally scraped by the oil scraper 3.62 is also provided on one side of the product of the present invention. The separation box 3.61 is installed on the purification box 3.5;

[0055] A liquid separation port 3.612 is provided between the two filter chambers 3.611 of the separation box 3.61. The liquid separation port 3.612 connects the two filter chambers 3.611 and is located at the upper end. One end of the buffer elbow 3.63 is installed at the upper end of one of the filter chambers 3.611 of the separation box 3.61 and connects the separation box 3.61. The other end of the buffer elbow 3.63 connects to a connecting pipe. A diaphragm pump is provided on the connecting pipe. The end of the connecting pipe is located in the collecting cylinder of the floating oil collecting assembly 3.3. The buffer elbow 3.63 is mainly an oil-water separation inlet. The diaphragm pump is connected to an external power supply to pump the collected floating oil into the separation box 3.61 through the connecting pipe for oil-water separation.

[0056] The filter screen plate 3.65 is installed in the filter cavity 3.611 where the buffer elbow 3.63 is installed, and is lower than the liquid separation port 3.612 and the buffer elbow 3.63, and the liquid separation port 3.612 and the buffer elbow 3.63 are located at the same height; the upper end of the small aeration component 3.64 is installed on the filter screen plate 3.65.

[0057] As an embodiment of the present invention, in addition to the above structure, its aeration assembly 3.64 is composed of an ozone inlet pipe 3.641 and an aerator 3.642 located in the purification box 3.5. The ozone inlet pipe 3.641 transports ozone to the aerator 3.642. The aerator 3.642 is a disc aerator. The disc aerator increases the gas-liquid contact area for effective aeration. The number of aerators 3.642 can be appropriately set according to the capacity of the purification box 3.5.

[0058] As an embodiment of the present invention, in addition to the above structure, its floating oil collection assembly 3.3 has a mounting rod 3.32, a linear bearing 3.33, a hollow panel-type float connector 3.34, a plurality of floats 3.35, a collection barrel 3.36, and a mounting bracket 3.37. The plurality of floats 3.35 are installed outside the collection barrel 3.36, at least three floats 3.35, and may also be four or five. The float 3.35 may also be a floating plate, which is selected according to needs, so that it floats on the liquid level of the cutting fluid, ensuring that the collection barrel 3.36 is located on the oil-water separation interface of the cutting fluid, and can collect floating oil foam;

[0059] The linear bearing 3.33 is sleeved on the mounting rod 3.32, and the mounting rod 3.32 fixes the inner ring of the linear bearing 3.33. The mounting bracket 3.37 is fixed outside the linear bearing 3.33. The length of the mounting bracket 3.37 can be longer. It is best to make the collection bucket 3.36 located in the center of the liquid, and install the floating oil collection component 3.3 into the purification box 3.5. The mutual cooperation of the mounting rod 3.32, the linear bearing 3.33, and the mounting bracket 3.37 enables the mounting rod 3.32 to move up and down linearly with the floating ball, so as to prevent the floating ball 3.35 from running off to a position that is not conducive to collecting floating oil. The floating ball connector 3.34 is installed above the opening of the collection bucket 3.36 through the spaced bracket 3.38. The mounting rod 3.32 is fixed on the floating ball connector 3.34. There is liquid entering the space between the floating ball connector 3.34 and the collection bucket 3.36, and the floating oil enters the collection bucket 3.36.

[0060] As an embodiment of the present invention, in addition to the above structure, the multi-purpose filter assembly 3.4 includes a plurality of bag filters 3.41 connected in parallel through pipelines and a third submersible pump 3.42 for conveying liquid to the bag filters 3.41. The third submersible pump 3.42 is located in the primary filter tank 3.511. The water filtered by the bag filter 3.41 is conveyed to the secondary filter tank 3.512 through a pipeline. The cutting fluid has a higher cleanliness after multiple purifications and is suitable for corporate users with higher requirements for cutting fluid quality.

[0061] As an embodiment of the present invention, in addition to the above structure, the small aeration component 3.64 includes an aeration pipe 3.646, and the aeration pipe 3.646 is provided with a long strip of air outlets 3.647 at both ends. The aeration pipe 3.646 is provided with an adjusting piston 3.648 that can move up and down and seal the aeration pipe 3.646. A threaded rod 3.643 is installed on the upper end of the adjusting piston 3.648. A nut 3.644 threadedly connected to the threaded rod is provided on the separation box 3.61. A hand wheel 3.645 is provided on the upper end of the threaded rod 3.643 outside the separation box 3.61. The hand wheel 3.645 is rotated to drive the threaded rod 3.643 to rotate, thereby driving the adjusting piston 3.648 to move up or down, thereby adjusting the air output of the air outlet 3.647. When the adjusting piston 3.648 is located below the air outlet 3.647, the aeration pipe 3.646 is completely sealed so that it cannot discharge air.

[0062] The air outlet 3.647 at the upper end of the aeration pipe 3.646 extends to the upper surface of the filter screen plate 3.65, is not blocked by the filter screen plate 3.65, and can fully exhaust air. The lower end thereof extends out of the separation box 3.61 and is connected to a reducer 3.66. The reducer 3.66 increases the pressure difference to provide suction to the fluid, inhales ozone, and replaces the aeration method of the aeration plate to inhale ozone into the fluid, so as to achieve full mixing of the fluid and the floating oil mixed with the cutting fluid, and accelerate the separation of water and oil. The other end of the reducer 3.66 is connected to a pipe connector 3.67, which is connected to an external ozone delivery pipe through the pipe connector 3.67.

[0063] The oil-water separation component 3.6 and the small aeration component 3.64 of the product of the present invention have reasonable and compact structural designs, and maximize the use of space to achieve better technical effects.

[0064] As an embodiment of the present invention, in addition to the above structure, it also includes a collection cart 6 for collecting impurities filtered by the paper bag filter 3.1. The collection cart 6 is located on one side of the purification box 3.5 and close to the paper bag filter 3.1. The secondary filter tank 3.512 is provided with a concentration detector 7, a pH detector 8, an automatic concentration ratio and other structures. The secondary filter tank 3.512 is provided with a water supply pipe 5.1, and the water supply pipe 5.1 is provided with a water supply valve 5.2, making the product of the present invention more intelligent and automated.

[0065] As an embodiment of the present invention, in addition to the above-mentioned structure, in order to ensure that the discharged cutting fluid has high cleanliness and does not contain waste oil, a water outlet box 3.7 is provided outside the filter chamber 3.611 of the separation box equipped with the oil scraper 3.62. The upper end of the water outlet box 3.7 is open, which is easy to discharge water at the end. A water outlet pipe 3.8 with the water outlet facing upward is provided in the water outlet box 3.7. The water inlet of the water outlet pipe 3.8 is connected to the lower end of the filter chamber 3.611 of the separation box equipped with the oil scraper 3.62 through a bend pipe 3.613. The water inlet of the water outlet pipe 3.8 is located at the low end to ensure that it can only pass the cutting fluid with the liquid level below instead of waste oil. The water outlet of the water outlet pipe 3.8 is lower than the upper surface of the opening of the water outlet box 3.7 to ensure that the liquid level is always located in the water outlet box 3.7.

[0066] During the specific implementation of the present invention, the workshop wastewater is collected into a collection tank, the first submersible pump delivers water into a paper belt filter, and then into a primary filter tank, the third submersible pump in the primary filter tank delivers water into a bag filter for filtration, and the floating oil is fully mixed through an aerator to accelerate the separation of water and oil;

[0067] The aerator in the primary filter tank works synchronously with the paper filter and the first submersible pump to help the floating oil move upward while filtering. The floating oil is then collected by the floating oil collection assembly. The collected floating oil mixed with cutting fluid is then sent to the oil-water separation assembly for oil-water separation through a diaphragm pump. Finally, the water goes into the box and the oil goes into the barrel, completing the purification closed loop.

[0068] Finally, the purified water is located in the second purification tank and is supplied at a constant pressure by the constant pressure liquid supply module to keep the water supply pressure constant, thereby maintaining a balance between water supply and water use.

[0069] The present invention and its implementation modes are described above. Such description is not restrictive. What is shown in the drawings is only one of the implementation modes of the present invention. The actual structure is not limited thereto.

[0070] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, it is obvious that the drawings described above are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0071] In summary, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creatively designing without departing from the purpose of the invention, they should all fall within the scope of protection of the invention.

Claims

1. An oil collecting and liquid supplying device, comprising a collecting tank (1) for collecting waste liquid from a workshop, characterized in that: It also includes a pump body assembly (2), a water purification module (3), and a constant pressure liquid supply module (5); The water purification module (3) comprises a paper bag filter (3.1) for primary filtration, an aeration component (3.2), a floating oil collection component (3.3), an oil-water separation component (3.6) for separating oil collected by the floating oil collection component (3.3) from water, a multi-purpose filter component (3.4) for secondary filtration, and a purification box (3.5); The floating oil collection assembly (3.3) is composed of a mounting rod (3.32), a linear bearing (3.33), a float connector (3.34), a plurality of floats (3.35), a collection bucket (3.36), and a mounting bracket (3.37); the plurality of floats (3.35) are mounted outside the collection bucket (3.36); the linear bearing (3.33) is sleeved on the mounting rod (3.32); the mounting bracket (3.37) is fixed outside the linear bearing (3.33); the floating oil collection assembly (3.3) is installed in the purification box (3.5); the float connector (3.34) is installed above the opening of the collection bucket (3.36) through a spaced bracket (3.38); and the mounting rod (3.32) is fixed on the float connector (3.34); The multi-purpose filter assembly (3.4) is composed of a plurality of bag filters (3.41) connected in parallel through pipelines and a third submersible pump (3.42) for conveying liquid to the bag filters (3.41); the third submersible pump (3.42) is located in the primary filter tank (3.511); the water filtered by the bag filters (3.41) is conveyed to the secondary filter tank (3.512) through pipelines; A primary filter pool (3.511) and a secondary filter pool (3.512) are provided in the purification box (3.5); an overflow pipe (3.52) is provided in the primary filter pool (3.511); an overflow outlet of the overflow pipe (3.52) is connected to the upper end of the secondary filter pool (3.512); The pump body component (2) transports the waste liquid in the collection tank (1) to the paper bag filter (3.1), and the liquid filtered by the paper bag filter (3.1) enters the primary filter tank (3.511) and is aerated by the aeration component (3.2), and then the floating oil is collected by the floating oil collection component (3.3); The multi-purpose filter component (3.4) performs secondary filtration on the liquid purified in the primary filter pool (3.511) and then transports it to the secondary filter pool (3.512), and the constant pressure liquid supply module (5) supplies the filtered liquid in the secondary filter pool (3.512) at a constant pressure; The oil-water separation component (3.6) comprises a separation box (3.61) having two filter chambers (3.611), an oil scraper (3.62), a buffer elbow (3.63), a small aeration component (3.64) capable of adjusting the air flow rate and improving the separation efficiency, and a filter screen plate (3.65); A liquid separation port (3.612) is provided between the two filter chambers (3.611) of the separation box (3.61); one end of the buffer elbow (3.63) is installed at the upper end of one of the filter chambers (3.611) of the separation box (3.61); the other end of the buffer elbow (3.63) draws the floating oil collected in the floating oil collection component (3.3) into the separation box (3.61) through a connecting pipe; the filter screen plate (3.65) is installed in the filter chamber (3.611) where the buffer elbow (3.63) is installed, and is lower than the liquid separation port (3.612) and the buffer elbow (3.63); the upper end of the small aeration component (3.64) is installed on the filter screen plate (3.65); The small aeration assembly (3.64) comprises an aeration pipe (3.646) located in a separation box, the aeration pipe (3.646) is provided with a long strip of air outlets (3.647) at both the front and rear ends, the aeration pipe (3.646) is provided with an adjusting piston (3.648) that can move up and down and seal the aeration pipe (3.646), a threaded rod (3.643) is installed at the upper end of the adjusting piston (3.648), a nut (3.644) threadedly connected to the threaded rod is provided on the separation box (3.61), and a hand wheel (3.645) is provided at the upper end of the threaded rod (3.643) located outside the separation box (3.61).

2. The oil collecting and liquid supplying device according to claim 1, characterized in that: The aeration assembly (3.2) is composed of an ozone inlet pipe (3.641) and an aerator (3.642) located in the purification box (3.5); the ozone inlet pipe (3.641) transports ozone to the aerator (3.642); and the aerator (3.642) is a disc aerator.

3. An oil collecting and liquid supplying device according to any one of claims 1-2, characterized in that: The pump body assembly (2) comprises at least two first submersible pumps (2.1), wherein the first submersible pumps (2.1) transport the liquid in the collection tank (1) to the input port of the paper bag filter (3.1).

4. The oil collecting and liquid supplying device according to claim 1, characterized in that: It also includes a water outlet box (3.7) outside the filter chamber (3.611) of the separation box equipped with the oil scraper (3.62), the upper end of the water outlet box (3.7) is open, and a water outlet pipe (3.8) with an outlet facing upward is provided in the water outlet box (3.7), the water inlet of the water outlet pipe (3.8) is connected to the lower end of the filter chamber (3.611) of the separation box equipped with the oil scraper (3.62) through a bent pipe (3.613), and the water outlet of the water outlet pipe (3.8) is lower than the upper surface of the opening of the water outlet box (3.7).

5. The oil collecting and liquid supplying device according to claim 1, characterized in that: It also includes a collection trolley (6) for collecting impurities filtered by the paper bag filter (3.1).

6. The oil collecting and liquid supplying device according to claim 1, characterized in that: The secondary filtration tank (3.512) is provided with a concentration detector (7) and a pH detector (8).

7. The oil collecting and liquid supplying device according to any one of claims 1, 5 or 6, characterized in that: The secondary filtration pool (3.512) is provided with a water supply pipe (5.1), and the water supply pipe (5.1) is provided with a water supply valve (5.2).

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