A filter for oily wastewater used in chemical environmental protection

Abstract

The present invention discloses an oily wastewater filter for chemical environmental protection, comprising a filter tank body, an upper sealed S-shaped water flow baffle fixedly connected inside the filter tank body, the upper sealed S-shaped water flow baffle close to the swirl water inlet pipe, a lower sealed C-shaped water flow baffle evenly fixedly connected inside the filter tank body, a collecting mechanism is arranged between two adjacent lower sealed C-shaped water flow baffles, each collecting mechanism comprises an upper sealed C-shaped water flow baffle, a fixed ring fixedly connected inside the filter tank body, a filter material partition is installed inside the fixed ring, and a scraping mechanism is arranged outside the filter material partition. In the present invention: when the gas foam containing oil and impurity particles floats to the water surface and reaches a certain height, it will overflow into the upper sealed collection bin through the overflow port on the upper sealed collection bin, and the gas foam accumulated in the sealed collection bin can be discharged to the outside of the filter tank body by starting the sewage suction pump.

Description

Technical Field

[0001] The invention relates to the technical field of chemical environmental protection, in particular to an oily sewage filter used in chemical environmental protection. Background Art

[0002] Chemical environmental protection refers to reducing and eliminating the pollution of wastewater, waste gas and waste residue (referred to as "three wastes") in chemical production to the surrounding environment and the impact on ecological balance and human health, preventing and controlling pollution, improving the environment, and turning harm into benefit. In the work of chemical environmental protection, it is essential to treat oily wastewater. In the process of treating oily wastewater, oily wastewater filters are needed. Oily wastewater filters can effectively treat industrial wastewater and prevent wastewater from directly flowing into waters. It is of great significance to improve the ecological environment, enhance the quality of cities and promote economic development.

[0003] After searching, the utility model patent with Chinese patent number CN202740824U discloses an oily wastewater filter for chemical environmental protection, which includes a filter tank body, a plurality of oil separation ports are opened on the top of the filter tank body, and the oil separation ports are connected through a common oil discharge channel. "S"-shaped water flow baffles are arranged crosswise in the filter tank body, and a gas injection head provided with a gas source by a multiphase pump is arranged between each two baffles. A variable-rise angle spiral water flow channel with a swirl water inlet pipe is fixed at the sewage inlet, and a plurality of liquid inlet holes are opened on the channel. Compared with the prior art, the utility model patent with Chinese patent number CN202740824U combines three methods of air flotation, hydraulic cyclone and internal filter material, so that the filter material maintains an efficient filtering effect, and has the characteristics of high oil removal efficiency and good sewage treatment effect.

[0004] Although the above-mentioned filter can combine flotation, hydrocyclone and internal filter material to maintain a high-efficiency filtering effect of the filter material, the air bubbles containing oil and impurity particles floating on the water surface in the above-mentioned filter cannot be effectively discharged from the inside of the filter tank to the outside of the filter tank, thereby affecting the subsequent filtering effect of the filter tank on oily wastewater; and when the scraping blade in the above-mentioned filter scrapes off the oil on the surface of the filter material partition, the oil is easy to fall into the inside of the filter tank, thereby affecting the subsequent filtering effect of the filter tank on oily wastewater. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art that foam containing oil and impurity particles floating on the water surface cannot be effectively discharged from the inside of the filter tank to the outside of the filter tank; and when the scraping blade scrapes the oil on the surface of the filter material partition, the oil easily falls into the inside of the filter tank, and an oil-containing wastewater filter for chemical environmental protection is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An oily wastewater filter for chemical environmental protection, comprising a filter tank, wherein both sides of the filter tank are respectively fixedly connected with a wastewater inlet and a wastewater outlet, a side of the wastewater inlet close to the inside of the filter tank is fixedly connected with a swirl water inlet pipe, and gas injection heads provided with gas source by an air pump are evenly arranged inside the filter tank;

[0008] The filter tank body is fixedly connected with an upper sealed S-shaped water flow baffle, the upper sealed S-shaped water flow baffle is close to the swirl water inlet pipe, the filter tank body is evenly fixedly connected with a lower sealed C-shaped water flow baffle, and a foam collecting mechanism is provided between two adjacent lower sealed C-shaped water flow baffles;

[0009] Each of the collecting mechanisms comprises an upper sealed C-shaped water flow baffle fixedly connected to the inside of the filter tank, two adjacent upper sealed C-shaped water flow baffles are fixedly connected with a connecting pipe, the outer side of the upper sealed C-shaped water flow baffle close to the sewage outlet is fixedly connected with a discharge pipe, and the gas injection head is located between the adjacent upper sealed C-shaped water flow baffle and the lower sealed C-shaped water flow baffle;

[0010] The interior of the filter tank is fixedly connected with a fixed ring, the interior of the fixed ring is installed with a filter material partition, and the outer side of the filter material partition is provided with a scraping mechanism for scraping off oil stains on the surface thereof.

[0011] Among them, the oily sewage entering the cyclone inlet pipe through the sewage inlet will enter the interior of the filter tank under the action of the hydraulic cyclone, and then the oily sewage entering the filter tank will flow in a serpentine manner along the upper sealed S-shaped water flow baffle, the upper sealed C-shaped water flow baffle and the lower sealed C-shaped water flow baffle in turn to improve the oil-water separation efficiency.

[0012] The above technical solution further includes:

[0013] A sewage suction pump is installed on the outer side of the filter tank body close to the sewage outlet, and the inlet of the sewage suction pump is fixedly connected with the discharge pipe.

[0014] The discharge pipe can discharge the gas bubbles between the sealed collection bin and the upper sealed C-shaped water flow baffle plate by starting the sewage suction pump.

[0015] Each of the collecting mechanisms also includes an upper sealed collecting bin fixedly connected to the inside of the filter tank, the outer side of the upper sealed collecting bin is fixedly connected to the outer side of the upper sealed C-shaped water flow baffle, an overflow port is opened on the outer side of the upper sealed collecting bin, and an adjusting weir is slidably connected to the outside of the overflow port.

[0016] When the gas bubbles containing oil and impurity particles float to the water surface and reach a certain height, they will overflow through the overflow port on the upper sealed collection bin to between the upper sealed collection bin and the upper sealed C-shaped water flow baffle.

[0017] A U-shaped fixing frame is fixedly connected to the top of the filter tank body, and electro-hydraulic push rods A are evenly installed on the inner side of the U-shaped fixing frame. The output end of the electro-hydraulic push rod A is fixedly connected to a U-shaped connecting rod, and both ends of the U-shaped connecting rod extend to the interior of the filter tank body and are fixedly connected to the regulating weir.

[0018] Among them, by starting the two electro-hydraulic push rods A to adjust the height of the adjusting weir, the amount of water overflowing into the sealed collection bin and the upper sealed C-shaped water flow baffle can be reduced.

[0019] The top of the filter tank body is provided with an opening, a sealing cover is arranged outside the opening, through holes are symmetrically arranged outside the sealing cover, a handle is fixedly connected to the middle of the sealing cover, and buckles for fixing the sealing cover are symmetrically arranged on the top of the filter tank body.

[0020] The opening allows the main oil filter box and the two auxiliary oil filter boxes to be taken out from the inside of the filter tank; to ensure the sealing of the filter tank, the size of the through hole should be as small as possible, while ensuring that the sealing cover can be removed smoothly.

[0021] The scraping mechanism includes a connecting frame fixedly connected to the top of the U-shaped fixing frame, an electro-hydraulic push rod B is symmetrically installed on the inner side of the connecting frame, the output ends of the two electro-hydraulic push rods B respectively pass through the two through holes and are detachably connected to a main scraping blade, a slide groove A is provided in the middle of the main scraping blade, both ends of the inner side of the slide groove A are slidably connected to auxiliary scraping blades, a stiffness spring is fixedly connected between the two auxiliary scraping blades, and the outer sides of the two auxiliary scraping blades are fixedly connected to abutment balls that abut against the inner wall of the filter tank.

[0022] When the two abutting balls outside the two auxiliary scraping edges abut against the inner wall of the filter tank, the stiffness spring is always in a compressed state.

[0023] The bottom of the main scraping edge is fixedly connected with a main oil filter box, and the bottoms of the two auxiliary scraping edges both extend to below the main scraping edge and are fixedly connected with auxiliary oil filter boxes.

[0024] Slide grooves B are provided on both sides of the main oil filter box, and the two auxiliary oil filter boxes are slidably connected inside the two slide grooves B respectively.

[0025] Among them, when the main scraping blade drives the two auxiliary scraping blades to move upward to scrape the oil on the surface of the filter material partition, the telescopic length of the two auxiliary scraping blades first extends and then shortens as the main scraping blade rises, and the two auxiliary oil filter boxes always follow the two auxiliary scraping blades to extend and retract and receive the scraped oil.

[0026] The present invention has the following beneficial effects:

[0027] 1. In the present invention, the oily sewage entering the cyclone water inlet pipe through the sewage inlet will enter the interior of the filter tank under the action of the hydraulic cyclone, and then the oily sewage entering the filter tank will flow in a serpentine manner along the upper sealed S-shaped water flow baffle, the upper sealed C-shaped water flow baffle and the lower sealed C-shaped water flow baffle in sequence to improve the oil-water separation efficiency. At the same time, the gas injection head inside the filter tank is started to generate a large amount of fine air bubbles, which can drive the oil and impurity particles to float to the water surface.

[0028] 2. In the present invention, when the air bubbles containing oil and impurity particles float to the water surface and reach a certain height, they will overflow through the overflow port on the upper sealed collection bin to between the upper sealed collection bin and the upper sealed C-shaped water flow baffle. When a certain amount of air bubbles accumulates between the upper sealed collection bin and the upper sealed C-shaped water flow baffle, the air bubbles between the sealed collection bin and the upper sealed C-shaped water flow baffle can be discharged to the outside of the filter tank by starting the sewage suction pump.

[0029] 3. In the present invention, after opening the sealing cover, the two electro-hydraulic push rods B are started to drive the main scraping blade to move upward, and in the process of the main scraping blade driving the two auxiliary scraping blades to move upward to scrape the oil on the surface of the filter material partition, the compressed stiffness spring makes the abutment balls on the outside of the two auxiliary scraping blades always abut against the inner wall of the filter tank, that is, the telescopic length of the two auxiliary scraping blades first extends and then shortens with the rise of the main scraping blade, and the two auxiliary oil filter boxes always follow the two auxiliary scraping blades to extend and retract and receive the scraped oil, so that the oil on the surface of the filter material partition is scraped to between the main oil filter box and the two auxiliary oil filter boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the first appearance structure of an oily wastewater filter for chemical environmental protection proposed by the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0032] Figure 3 This is a schematic diagram of the second appearance structure of an oily wastewater filter for chemical environmental protection proposed by the present invention;

[0033] Figure 4This is a schematic diagram of the first cross-sectional structure of an oily wastewater filter for chemical environmental protection proposed by the present invention;

[0034] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0035] Figure 6 for Figure 4 A magnified schematic diagram of the structure at C in the middle;

[0036] Figure 7 This is a schematic diagram of the second cross-sectional structure of an oily wastewater filter for chemical environmental protection proposed by the present invention;

[0037] Figure 8 for Figure 7 A magnified schematic diagram of the structure at D in the middle;

[0038] Fig. 9 for Figure 8 The enlarged schematic diagram of the structure at E in the middle;

[0039] Fig.10 It is a schematic diagram of the cross-sectional structure of the connecting frame in the present invention.

[0040] In the figure: 1, filter tank; 2, sewage inlet; 3, sewage outlet; 4, cyclone inlet pipe; 5, gas injection head; 6, upper sealed S-shaped water flow baffle; 7, lower sealed C-shaped water flow baffle; 8, collecting mechanism; 81, upper sealed C-shaped water flow baffle; 82, connecting pipe; 83, discharge pipe; 84, upper sealed collecting chamber; 85, overflow port; 86, regulating weir; 9, fixed ring; 10, filter material partition; 11, scraping mechanism; 111, connecting pipe Frame; 112, electro-hydraulic push rod B; 113, main scraping blade; 1131, slide A; 114, auxiliary scraping blade; 115, stiffness spring; 116, abutment ball; 117, main oil filter box; 1171, slide B; 118, auxiliary oil filter box; 12, sewage suction pump; 13, U-shaped fixing frame; 14, electro-hydraulic push rod A; 15, U-shaped connecting rod; 16, opening; 17, sealing cover; 18, through hole; 19, handle; 20, buckle. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] like Figure 1 , Figure 3-5 and Figure 7 As shown, the oily wastewater filter for chemical environmental protection proposed by the present invention comprises a filter tank body 1, both sides of the filter tank body 1 are fixedly connected with a wastewater inlet 2 and a wastewater outlet 3, a side of the wastewater inlet 2 close to the inside of the filter tank body 1 is fixedly connected with a swirl water inlet pipe 4, and the inside of the filter tank body 1 is evenly provided with gas injection heads 5 provided with gas source by an air pump, the gas injection heads 5 belong to the prior art and are not described here in detail, and the gas injection heads 5 can be activated to generate a large amount of fine gas bubbles, and the fine gas bubbles can drive oil and impurity particles to float to the water surface;

[0044] An upper sealed S-shaped water flow baffle 6 is fixedly connected to the interior of the filter tank body 1. Except for the bottom edge, the other edges of the upper sealed S-shaped water flow baffle 6 are fixedly connected to the inner wall of the filter tank body 1. The upper sealed S-shaped water flow baffle 6 is close to the vortex water inlet pipe 4. The interior of the filter tank body 1 is evenly fixedly connected with a lower sealed C-shaped water flow baffle 7. Except for the top edge, the other edges of the lower sealed C-shaped water flow baffle 7 are fixedly connected to the inner wall of the filter tank body 1. The oily sewage entering the vortex water inlet pipe 4 through the sewage inlet 2 will enter the interior of the filter tank body 1 under the action of the hydraulic vortex. Subsequently, the oily sewage entering the interior of the filter tank body 1 flows in a serpentine manner along the upper sealed S-shaped water flow baffle 6, the upper sealed C-shaped water flow baffle 81 and the lower sealed C-shaped water flow baffle 7 in turn to improve the oil-water separation efficiency.

[0045] A collection mechanism 8 for collecting foam is provided between two adjacent lower sealed C-shaped water flow baffles 7, and each collection mechanism 8 includes an upper sealed C-shaped water flow baffle 81 fixedly connected to the inside of the filter tank body 1, and the upper sealed C-shaped water flow baffle 81, except for the bottom edge, has other edges fixedly connected to the inner wall of the filter tank body 1, and a connecting pipe 82 is fixedly connected between the two adjacent upper sealed C-shaped water flow baffles 81, and a discharge pipe 83 is fixedly connected to the outer side of the upper sealed C-shaped water flow baffle 81 near the sewage outlet 3, and the gas injection head 5 is located between the adjacent upper sealed C-shaped water flow baffle 81 and the lower sealed C-shaped water flow baffle 7;

[0046] A sewage suction pump 12 is installed on the outside of the filter tank body 1 near the sewage outlet 3. The inlet of the sewage suction pump 12 is fixedly connected to the discharge pipe 83. By starting the sewage suction pump 83, the discharge pipe 83 can discharge the gas bubbles between the sealed collection bin 84 and the upper sealed C-shaped water flow baffle 81.

[0047] Each collecting mechanism 8 also includes an upper sealed collecting bin 84 fixedly connected to the inside of the filter tank 1, the outer side of the upper sealed collecting bin 84 is fixedly connected to the outer side of the upper sealed C-shaped water flow baffle 81, and an overflow port 85 is provided on the outer side of the upper sealed collecting bin 84. When the gas bubbles containing oil and impurity particles float to the water surface and reach a certain height, they will overflow to the space between the upper sealed collecting bin 84 and the upper sealed C-shaped water flow baffle 81 through the overflow port 85 on the upper sealed collecting bin 84, and the outer side of the overflow port 85 is slidably connected to an adjusting weir 86;

[0048] A U-shaped fixing frame 13 is fixedly connected to the top of the filter tank body 1, and electro-hydraulic push rods A14 are evenly installed on the inner side of the U-shaped fixing frame 13. The output end of the electro-hydraulic push rod A14 is fixedly connected to a U-shaped connecting rod 15. Both ends of the U-shaped connecting rod 15 extend to the interior of the filter tank body 1 and are fixedly connected to the adjusting weir 86. By starting the two electro-hydraulic push rods A14 to adjust the height of the adjusting weir 86, the amount of water overflowing into the sealed collection bin 84 and the upper sealed C-shaped water flow baffle 81 can be reduced.

[0049] In this embodiment, the oily sewage entering the cyclone water inlet pipe 4 through the sewage inlet 2 will enter the interior of the filter tank 1 under the action of the hydraulic cyclone, and then the oily sewage entering the filter tank 1 will flow in a serpentine manner along the upper sealed S-shaped water flow baffle 6, the upper sealed C-shaped water flow baffle 81 and the lower sealed C-shaped water flow baffle 7 in sequence to improve the oil-water separation efficiency;

[0050] At the same time, the gas injection head 5 inside the filter tank 1 is started to generate a large amount of fine gas bubbles, which can drive the oil and impurity particles to float to the water surface;

[0051] When the gas bubbles containing oil and impurity particles float to the water surface and reach a certain height, the gas bubbles will overflow through the overflow port 55 on the upper sealed collection bin 54 to between the upper sealed collection bin 54 and the upper sealed C-shaped water flow baffle 51;

[0052] In this process, by activating the two electro-hydraulic push rods A14 to adjust the height of the regulating weir 86, the amount of water overflowing into the sealed collection bin 84 and the upper sealed C-shaped water flow baffle 81 can be reduced;

[0053] When a certain amount of air bubbles accumulate between the upper sealed collection bin 54 and the upper sealed C-shaped water flow baffle 51, the air bubbles between the sealed collection bin 54 and the upper sealed C-shaped water flow baffle 51 can be discharged to the outside of the filter tank 1 through the connecting pipe 82 and the discharge pipe 83 in sequence by starting the sewage suction pump 12.

[0054] Embodiment 2

[0055] like Figure 1-4 and Figure 6-10As shown, based on the first embodiment, a fixed ring 9 is fixedly connected to the inside of the filter tank 1, a filter material partition 10 is installed inside the fixed ring 9, and a scraping mechanism 11 for scraping oil stains on the surface of the filter material partition 10 is arranged on the outside of the filter material partition 10. The scraping mechanism 11 includes a connecting frame 111 fixedly connected to the top of the U-shaped fixing frame 13, and the inner side of the connecting frame 111 is symmetrically installed with an electro-hydraulic push rod B112, and the output ends of the two electro-hydraulic push rods B112 respectively pass through two through holes 18 and are detachably connected to the main scraping blade 11 3. A slide groove A1131 is provided in the middle of the main scraping blade 113, and auxiliary scraping blades 114 are slidably connected to both ends of the inner part of the slide groove A1131. A stiffness spring 115 is fixedly connected between the two auxiliary scraping blades 114. Abutment balls 116 abutting against the inner wall of the filter tank body 1 are fixedly connected to the outer sides of the two auxiliary scraping blades 114. When the two abutment balls 116 on the outer sides of the two auxiliary scraping blades 114 abut against the inner wall of the filter tank body 1, the stiffness spring 115 between the two auxiliary scraping blades 114 is always in a compressed state;

[0056] The bottom of the main scraping blade 113 is fixedly connected with a main oil filter box 117, the bottoms of the two auxiliary scraping blades 114 extend to the bottom of the main scraping blade 113 and are fixedly connected with auxiliary oil filter boxes 118, both sides of the main oil filter box 117 are provided with sliding grooves B1171, and the two auxiliary oil filter boxes 118 are slidably connected inside the two sliding grooves B1171 respectively;

[0057] An opening 16 is provided at the top of the filter tank body 1. The opening 16 allows the main oil filter box 117 and the two auxiliary oil filter boxes 118 to be taken out from the inside of the filter tank body 1. A sealing cover 17 is provided outside the opening 16. Through holes 18 are symmetrically provided outside the sealing cover 17. To ensure the sealing performance of the filter tank body 1, the size of the through holes 18 should be as small as possible, while ensuring that the sealing cover 17 can be removed smoothly. A handle 19 is fixedly connected to the middle of the sealing cover 17. Buckles 20 for fixing the sealing cover 17 are symmetrically provided on the top of the filter tank body 1. The buckles 20 belong to the prior art and are not described here in detail.

[0058] In this embodiment, after the buckles 20 on both sides of the sealing cover 17 are opened, the sealing cover 17 is removed, and then the two electro-hydraulic push rods B112 are started, so that the two electro-hydraulic push rods B112 are shortened to drive the main scraping blade 113 and the two auxiliary scraping blades 114 to move upward;

[0059] When the main scraper blade 113 drives the two auxiliary scraper blades 114 to move upward to scrape the oil on the surface of the filter material partition 10, the compressed stiffness spring 115 makes the abutment balls 116 on the outer sides of the two auxiliary scraper blades 114 always abut against the inner wall of the filter tank 1. As the main scraper blade 113 and the two auxiliary scraper blades 114 drive the main oil filter box 117 and the two auxiliary oil filter boxes 118 to rise, the telescopic length of the two auxiliary scraper blades 114 will first extend and then shorten, and the two auxiliary oil filter boxes 118 will always follow the two auxiliary scraper blades 114 to extend and retract. The main oil filter box 117 and the two auxiliary oil filter boxes 118 cooperate to receive the oil scraped off by the main scraper blade 113 and the two auxiliary scraper blades 114, so that the oil on the surface of the filter material partition 10 is completely scraped off to between the main oil filter box 117 and the two auxiliary oil filter boxes 118.

[0060] When the main oil filter box 117 and the two auxiliary oil filter boxes 118 move to the top of the filter tank 1, the main scraper blade 113 is removed from the output ends of the two electro-hydraulic push rods B112 to process the oil in the main oil filter box 117 and the two auxiliary oil filter boxes 118.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oily wastewater filter for chemical environmental protection, comprising a filter tank (1), wherein both sides of the filter tank (1) are respectively fixedly connected with a wastewater inlet (2) and a wastewater outlet (3), wherein the wastewater inlet (2) is fixedly connected with a swirl water inlet pipe (4) on one side close to the inside of the filter tank (1), and gas injection heads (5) provided with gas source by an air pump are evenly arranged inside the filter tank (1), characterized in that: An upper sealed S-shaped water flow baffle (6) is fixedly connected inside the filter tank body (1), the upper sealed S-shaped water flow baffle (6) is close to the swirl water inlet pipe (4), and a lower sealed C-shaped water flow baffle (7) is evenly fixedly connected inside the filter tank body (1); A collection mechanism (8) for collecting foam is provided between two adjacent lower sealed C-shaped water flow baffles (7), each of the collection mechanisms (8) comprising an upper sealed C-shaped water flow baffle (81) fixedly connected to the inside of the filter tank (1), a connecting pipe (82) is fixedly connected between the two adjacent upper sealed C-shaped water flow baffles (81), a discharge pipe (83) is fixedly connected to the outer side of the upper sealed C-shaped water flow baffle (81) near the sewage outlet (3), and the gas injection head (5 ) is located between the adjacent upper sealed C-shaped water flow baffle (81) and the lower sealed C-shaped water flow baffle (7), each of the collecting mechanisms (8) further comprising an upper sealed collecting bin (84) fixedly connected to the inside of the filter tank (1), the outer side of the upper sealed collecting bin (84) being fixedly connected to the outer side of the upper sealed C-shaped water flow baffle (81), an overflow port (85) being provided on the outer side of the upper sealed collecting bin (84), and an adjusting weir (86) being slidably connected to the outside of the overflow port (85); A U-shaped fixing frame (13) is fixedly connected to the top of the filter tank body (1), an opening (16) is provided on the top of the filter tank body (1), a sealing cover (17) is provided outside the opening (16), and through holes (18) are symmetrically provided outside the sealing cover (17), a fixing ring (9) is fixedly connected to the inside of the filter tank body (1), a filter material partition (10) is installed inside the fixing ring (9), and a scraping mechanism (11) for scraping oil stains on the surface of the filter material partition (10) is provided outside the filter material partition (10), and the scraping mechanism (11) comprises a connecting frame (111) fixedly connected to the top of the U-shaped fixing frame (13), and electro-hydraulic push rods B (112) are symmetrically installed on the inner side of the connecting frame (111), and two electro-hydraulic push rods B (112) are symmetrically installed inside the connecting frame (111). The output ends of the scraper (112) respectively pass through the two through holes (18) and are detachably connected to the main scraper blade (113). A slide groove A (1131) is provided in the middle of the main scraper blade (113). Both ends of the slide groove A (1131) are slidably connected to auxiliary scraper blades (114). A stiffness spring (115) is fixedly connected between the two auxiliary scraper blades (114). The outer sides of the two auxiliary scraper blades (114) are fixedly connected to abutment balls (116) that abut against the inner wall of the filter tank (1). The bottom of the main scraper blade (113) is fixedly connected to a main oil filter box (117). The bottoms of the two auxiliary scraper blades (114) extend to below the main scraper blade (113) and are fixedly connected to auxiliary oil filter boxes (118).

2. The oily wastewater filter for chemical environmental protection according to claim 1, characterized in that: A sewage suction pump (12) is installed on the outside of the filter tank (1) close to the sewage outlet (3), and the inlet of the sewage suction pump (12) is fixedly connected to the discharge pipe (83).

3. The oily wastewater filter for chemical environmental protection according to claim 1, characterized in that: Electrohydraulic push rods A (14) are evenly mounted on the inner side of the U-shaped fixing frame (13), and the output end of the electrohydraulic push rod A (14) is fixedly connected to a U-shaped connecting rod (15), and both ends of the U-shaped connecting rod (15) extend into the interior of the filter tank (1) and are fixedly connected to the regulating weir (86).

4. The oily wastewater filter for chemical environmental protection according to claim 1, characterized in that: A handle (19) is fixedly connected to the middle of the sealing cover (17), and buckles (20) for fixing the sealing cover (17) are symmetrically arranged on the top of the filter tank body (1).

5. The oily wastewater filter for chemical environmental protection according to claim 1, characterized in that: Slide grooves B (1171) are provided on both sides of the main oil filter box (117), and the two auxiliary oil filter boxes (118) are slidably connected inside the two slide grooves B (1171) respectively.

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