An oil-containing wastewater treatment system and apparatus

Abstract

The present application relates to sewage treatment technical field, disclose a kind of oily sewage treatment system and equipment, wherein, a kind of oily sewage treatment equipment, including shell, sewage input end and scum output end being arranged on the side wall of shell, sewage output end being arranged on the side wall of shell, exhaust pipe being arranged on the upper end of shell, electrolytic component being arranged in shell, scum scraping mechanism and baffling component, scum scraping mechanism is located directly above electrolytic component, baffling component is arranged in shell near the position of other side wall, the sewage input end is located directly below scum output end;The present application uses telescopic scum scraping mechanism to cooperate with circumferential reciprocating movement mechanism to carry out the scraping process of scum, and in the process of circumferential reciprocating movement, by the extension process of telescopic scum scraping mechanism cooperation shovel component and telescopic buffer component arranged on telescopic scum scraping mechanism to realize the effect of self-cleaning, without using additional cleaning equipment, reduce energy loss and equipment manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to an oily wastewater treatment system and equipment. Background Technology

[0002] Electroflotation technology involves electrolyzing wastewater under a direct current electric field, producing O2 at the anode and H2 at the cathode. The bubbles generated by electrolysis are very small in size and low in density, so their ability to trap impurity particles is higher than that of dissolved air flotation and mechanical impeller flotation, and their buoyancy capacity is also higher.

[0003] When treating wastewater, electroflotation equipment requires a scraper structure to remove scum floating on the water surface. This allows the scum to be continuously transported to the scum discharge outlet, thus separating the water from the scum. However, due to the adhesive nature of the scum, prolonged use can cause scum to adhere to the scraper structure, gradually increasing its operating resistance and reducing wastewater treatment efficiency. Therefore, the scraper structure needs to be cleaned. Currently, the most common methods are manual or automated cleaning equipment, which increases the complexity of the equipment and cleaning costs. Summary of the Invention

[0004] The purpose of this invention is to provide an oily wastewater treatment system and equipment to solve the above-mentioned problems.

[0005] This invention provides an oily wastewater treatment device, including a shell, a wastewater inlet and a scum outlet on one side wall of the shell, a wastewater outlet on the other side wall of the shell, an exhaust pipe at the upper end of the shell, an electrolysis assembly, a scum scraping mechanism, and a baffle assembly inside the shell. The scum scraping mechanism is located directly above the electrolysis assembly, and the baffle assembly is located inside the shell near the other side wall. The wastewater inlet is located directly below the scum outlet.

[0006] The sludge scraping mechanism includes a circumferential reciprocating moving mechanism connected to the inner wall of the housing and a number of telescopic sludge scraping mechanisms equidistantly connected to the circumferential reciprocating moving mechanism. The circumferential reciprocating moving mechanism is used to drive the number of telescopic sludge scraping mechanisms to move circumferentially back and forth between the baffle assembly and the sludge output end. The telescopic sludge scraping mechanism is used to scrape the sludge floating on the surface of the sewage to the sludge output end.

[0007] The telescopic slag scraping mechanism includes a telescopic slag scraping assembly, a shovel assembly connected to one end of the telescopic slag scraping assembly, and a telescopic buffer assembly disposed within the telescopic slag scraping assembly. One end of the telescopic buffer assembly is connected to the shovel assembly, and the other end is connected to the internal space of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in a contracted state, the telescopic buffer assembly is in a stretched state and draws in the internal gas of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in an extended state, the telescopic buffer assembly is in a compressed state and discharges its internal gas into the shovel assembly. The shovel assembly is used to shovel the outer surface of the moving part of the telescopic slag scraping assembly.

[0008] As a further optimization of the present invention, the electrolysis assembly includes a cathode assembly and an anode assembly connected to the housing, and the cathode assembly and the anode assembly are distributed in a cross pattern.

[0009] As a further optimization of the present invention, the baffle assembly includes a lower baffle connected to the inner wall of the lower end of the housing and an upper baffle connected to the inner wall of the upper end of the housing. The upper end of the upper baffle is provided with a gap between it and the circumferential reciprocating moving mechanism, and the lower end of the upper baffle is provided with a gap between it and the inner wall of the lower end of the housing. The upper baffle is located between the lower baffle and the sewage output end.

[0010] As a further optimization of the present invention, the circumferential reciprocating movement mechanism includes a motor connected to the outer wall of the housing, two rotating shafts movably connected to the inner wall of the housing, sprockets connected to the rotating shafts, and a chain connected between the sprockets. One of the rotating shafts is connected to the output shaft end of the motor, and several of the telescopic slag scraping mechanisms are equidistantly connected to the chain.

[0011] As a further optimization of the present invention, the telescopic slag scraping assembly includes a connecting frame, a hollow plate connected to the lower end of the connecting frame, a movable chamber disposed inside the hollow plate, a limiting slide plate slidably connected to the inner wall of the movable chamber, and a slag scraping plate connected to the limiting slide plate. One end of the slag scraping plate passes through one end of the hollow plate, and the other end of the hollow plate is connected to the connecting frame. The other end of the hollow plate is provided with a perforation, and the movable chamber communicates with the internal space of the shell through the perforation.

[0012] As a further optimization of the present invention, the telescopic buffer assembly includes a first square telescopic tube connected between the limiting slide plate and the inner wall of one end of the hollow plate, a second square telescopic tube, a first square annular groove provided on the limiting slide plate, a first square annular plate connected to the inner wall of the first square annular groove, a plurality of first vent holes provided on the first square annular plate, a plurality of first plastic sealing sheets connected to the first square annular plate, a second square annular groove provided at one end of the hollow plate, a second square annular plate connected to the inner wall of the second square annular groove, a plurality of second vent holes provided on the second square annular plate, and a plurality of second plastic sealing sheets connected to the second square annular plate. The first plastic sealing sheet is connected at only one end to the end face of the first square annular plate near the first square telescopic tube, and the first plastic sealing sheet covers the plurality of first vent holes. The second plastic sealing sheet is connected at only one end to the end face of the second square annular plate away from the first square telescopic tube, and the second plastic sealing sheet covers the corresponding second vent holes. The sum of the areas of the plurality of first vent holes is less than the sum of the areas of the plurality of second vent holes.

[0013] As a further optimization of the present invention, the shoveling assembly includes an inner square ring shovel and an outer square ring body connected to one end of the hollow plate, and an annular filter screen slidably connected between the inner square ring shovel and the outer square ring body. Both the inner square ring shovel and the outer square ring body are connected with elastic elements, and the other end of each elastic element is fixedly connected to the annular filter screen. The inner square ring shovel is configured to cooperate with the scraper plate. The space between the inner square ring shovel and the outer square ring body is connected to the space between the first square telescopic tube and the second square telescopic tube through a second square annular groove.

[0014] An oily wastewater treatment system includes two sets of oily wastewater treatment equipment as described above, an oil-water separator, a sedimentation tank, an equalization tank, a Fenton system, an anaerobic tank, an integrated biochemical treatment equipment, an oily waste tank, and a sludge tank. The oily wastewater flows sequentially through the oil-water separator, sedimentation tank, equalization tank, one set of oily wastewater treatment equipment, Fenton system, and another set of oily wastewater treatment equipment and integrated biochemical treatment equipment. The oil and sludge discharged from the oil-water separator are respectively discharged into the oily waste tank and the sludge tank.

[0015] As a further optimization of the present invention, the integrated biochemical treatment equipment includes an anaerobic tank, three sets of contact oxidation tanks, an MBR membrane tank, and an effluent tank. Water discharged from another set of oily wastewater treatment equipment flows sequentially through the anaerobic tank, the first set of contact oxidation tanks, the facultative tank, the second set of contact oxidation tanks, the third set of contact oxidation tanks, the MBR membrane tank, and the effluent tank.

[0016] The beneficial effects of the present invention are as follows: The present invention uses a telescopic slag scraping mechanism in conjunction with a circumferential reciprocating moving mechanism to perform the slag scraping process. During the circumferential reciprocating movement, the telescopic slag scraping mechanism, in conjunction with the shovel and telescopic buffer components set on the telescopic slag scraping mechanism, achieves a self-cleaning effect, eliminating the need for additional cleaning equipment, reducing energy consumption and equipment manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a view showing the interaction between the circumferential reciprocating moving mechanism and the telescopic slag scraping mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the telescopic slag scraping mechanism of the present invention;

[0020] Figure 4 This is the present invention. Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is the present invention. Figure 3 Enlarged view at point B;

[0022] Figure 6 This is a schematic diagram of the process flow of the wastewater treatment system of the present invention.

[0023] In the diagram: 1. Shell; 101. Sewage inlet; 102. Sewage outlet; 103. Scum outlet; 105. Lower partition; 106. Upper partition; 107. Exhaust pipe; 2. Circular reciprocating movement mechanism; 201. Rotating shaft; 202. Sprocket; 203. Chain; 3. Telescopic scum scraping mechanism; 301. Connecting frame; 302. Hollow plate; 3020. Moving chamber; 3021. Perforation; 303. Limiting slide plate; 304. Scum scraper; 305. Telescopic buffer assembly; 306. 0. First square telescopic tube; 3051. Second square telescopic tube; 3052. First square annular groove; 3053. First square annular plate; 3054. First vent hole; 3055. First plastic sealing sheet; 3056. Second square annular groove; 3057. Second square annular plate; 3058. Second vent hole; 3059. Second plastic sealing sheet; 306. Scraping assembly; 3060. Inner square annular scraper; 3061. Outer square annular body; 3062. Annular filter screen; 3063. Elastic element. Detailed Implementation

[0024] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein. Furthermore, features described in some examples may be combined in other examples.

[0025] Example 1

[0026] like Figures 1-5 As shown, an oily wastewater treatment device includes a shell 1, a wastewater inlet 101 and a scum outlet 103 disposed on one side wall of the shell 1, a wastewater outlet 102 disposed on the other side wall of the shell 1, an exhaust pipe 107 disposed at the upper end of the shell 1, an electrolysis component, a scum scraping mechanism and a baffle assembly disposed inside the shell 1. The scum scraping mechanism is located directly above the electrolysis component, the baffle assembly is disposed inside the shell 1 near the other side wall, and the wastewater inlet 101 is located directly below the scum outlet 103.

[0027] The scum scraping mechanism includes a circumferential reciprocating moving mechanism 2 connected to the inner wall of the housing 1 and a plurality of telescopic scum scraping mechanisms 3 equidistantly connected to the circumferential reciprocating moving mechanism 2. The circumferential reciprocating moving mechanism 2 is used to drive the plurality of telescopic scum scraping mechanisms 3 to move circumferentially back and forth between the baffle assembly and the scum output end 103. The telescopic scum scraping mechanism 3 is used to scrape the scum floating on the surface of the sewage to the scum output end 103.

[0028] The telescopic slag scraping mechanism 3 includes a telescopic slag scraping assembly, a wiping assembly 306 connected to one end of the telescopic slag scraping assembly, and a telescopic buffer assembly 305 disposed inside the telescopic slag scraping assembly. One end of the telescopic buffer assembly 305 is connected to the wiping assembly 306, and the other end is connected to the internal space of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in a contracted state, the telescopic buffer assembly 305 is in a stretched state and draws in the internal gas of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in an extended state, the telescopic buffer assembly 305 is in a compressed state and discharges the internal gas into the wiping assembly 306. The wiping assembly 306 is used to wipe the outer surface of the moving part of the telescopic slag scraping assembly.

[0029] It should be noted that wastewater enters from the wastewater inlet 101, flows through the electrolysis unit, encounters the baffle assembly, and accumulates inside the housing 1. At this time, the bubbles generated by the electrolysis of water in the electrolysis unit coagulate the flocculent sludge in the wastewater, causing it to float to the surface. As the amount of wastewater increases, the control liquid level is raised above the set height of the scum outlet 103. The treated wastewater then flows through the channel of the baffle assembly and is discharged from the wastewater outlet 102 to the next treatment device. Meanwhile, the scum is continuously pushed to the scum outlet 103 by the scraping mechanism and exits from the scum outlet. 103 is discharged. The operation of the scum scraping mechanism is as follows: the reciprocating circular movement mechanism 2 continuously drives several telescopic scum scraping mechanisms 3 to reciprocate between the baffle assembly and the scum output end 103. Specifically, when the telescopic scum scraping mechanism 3 moves from the baffle assembly towards the scum output end 103, it is in the lower part of its circular movement stroke, that is, in contact with the sewage surface. At this time, the telescopic scum scraping assembly is in an extended state. Similarly, when it moves from the scum output end 103 towards the baffle assembly, it is in the lower part of its circular movement stroke, that is, in contact with the sewage surface. At this time, the telescopic scum scraping assembly is in an extended state. At the upper part of its circular movement, i.e., when it is out of contact with the sewage surface, the telescopic scraper assembly is in a shortened state. During this shortening process, the shoveling component 306 shovels the outer surface of the moving part of the telescopic scraper assembly, thereby removing the scum adhering to the outer surface of the moving part of the telescopic scraper assembly and collecting it on the shoveling component 306. However, during the half-circle movement trajectory near the baffle assembly, the telescopic scraper assembly travels a quarter circle from a horizontal state to a downward vertical state. When the trajectory is as described, it begins to extend until the telescopic scraper assembly is fully extended. Before it reaches the lower apex of the sprocket 202, the fully extended telescopic scraper assembly is inserted into the water and begins to scrape scum. During the rapid extension of the telescopic scraper assembly, its moving part begins to compress its internal telescopic buffer assembly 305 and rapidly sprays the gas inside it to the shovel assembly 306, thereby cleaning the scum collected on the shovel assembly 306 and allowing the scraped scum to fall back to the liquid surface.

[0030] The electrolysis assembly includes a cathode assembly and an anode assembly connected to the housing 1, and the cathode assembly and anode assembly are distributed in a cross pattern.

[0031] It should be noted that, as mentioned above, when the cathode and anode components are energized, the wastewater begins to be electrolyzed and bubbles are generated.

[0032] The baffle assembly includes a lower baffle 105 connected to the inner wall of the lower end of the housing 1 and an upper baffle 106 connected to the inner wall of the upper end of the housing 1. The upper end of the upper baffle 106 is provided with a gap between it and the circumferential reciprocating moving mechanism 2, and the lower end of the upper baffle 106 is provided with a gap between it and the inner wall of the lower end of the housing 1. The upper baffle 106 is located between the lower baffle 105 and the sewage output end 102.

[0033] It should be noted that after the sewage flows through the electrolysis unit, it impacts the lower baffle 105, obstructing the flow path. This effectively prevents sewage containing a lot of scum from being directly discharged from the sewage outlet 102. As the electrolysis process progresses, the scum gradually floats to the surface. The treated sewage flows through the gap between the lower baffle 105 and the upper baffle 106 and is eventually discharged from the sewage outlet 102. Due to buoyancy, the scum cannot enter the area between the lower baffle 105 and the upper baffle 106. As the scum scraping mechanism operates, the scum is gradually conveyed to the scum outlet 103 and is eventually discharged from the scum outlet 103.

[0034] The reciprocating motion mechanism 2 includes a motor connected to the outer wall of the housing 1, two rotating shafts 201 movably connected to the inner wall of the housing 1, sprockets 202 connected to the rotating shafts 201, and a chain 203 connected between the sprockets 202. One of the rotating shafts 201 is connected to the output shaft end of the motor, and several telescopic scraping mechanisms 3 are equidistantly connected to the chain 203.

[0035] It should be noted that, as described above, the operation of the reciprocating circular moving mechanism 2 is as follows: one of the rotating shafts 201 is driven to rotate by a motor, which in turn drives the sprocket 202 on it to rotate. After the sprocket 202 rotates, it drives the other sprocket 202 to rotate through the chain 203. The telescopic slag scraping mechanism 3 connected to the chain 203 can move in the same direction and distance as the chain 203. The movement path is as follows: the part of the chain 203 located below the sprocket 202 moves from the deflector assembly toward the slag output end 103, while the part of the chain 203 located above the sprocket 202 moves in the opposite direction.

[0036] The telescopic slag scraper assembly includes a connecting frame 301, a hollow plate 302 connected to the lower end of the connecting frame 301, a movable chamber 3020 disposed inside the hollow plate 302, a limiting slide plate 303 slidably connected to the inner wall of the movable chamber 3020, and a slag scraper 304 connected to the limiting slide plate 303. One end of the slag scraper 304 passes through one end of the hollow plate 302, and the other end of the hollow plate 302 is connected to the connecting frame 301. The other end of the hollow plate 302 is provided with a through hole 3021, and the movable chamber 3020 communicates with the internal space of the shell 1 through the through hole 3021.

[0037] It should be noted that, as mentioned above, when the telescopic scraper assembly moves with the chain 203, during the process of moving below the sprocket 202, the scraper plate 304 gradually slides down from the hollow plate 302 under its own gravity. However, during the process of rotating a quarter circle around the sprocket 202, its own gravity gradually increases, and the downward speed of the scraper plate 304 gradually accelerates. When the scraper plate 304 moves down, it drives the limiting slide plate 303 to move in the same direction and distance, and begins to quickly compress the telescopic buffer assembly 305. During the compression process, the gas in the telescopic buffer assembly 305 can be quickly sprayed towards the shovel assembly 306, thereby cleaning the floating scum on the shovel assembly 306 with air force, so that the floating scum on the shovel assembly 306 is blown off by the rapidly sprayed airflow.

[0038] The telescopic buffer assembly 305 includes a first square telescopic tube 3050 and a second square telescopic tube 3051 connected between the limiting slide plate 303 and the inner wall of one end of the hollow plate 302; a first square annular groove 3052 disposed on the limiting slide plate 303; a first square annular plate 3053 connected to the inner wall of the first square annular groove 3052; a plurality of first vent holes 3054 disposed on the first square annular plate 3053; a plurality of first plastic sealing sheets 3055 disposed on the first square annular plate 3053; a second square annular groove 3056 disposed at one end of the hollow plate 302; a second square annular plate 3057 connected to the inner wall of the second square annular groove 3056; and a plurality of first plastic sealing sheets 3055 disposed on the second square annular plate 3057. The system includes a second vent 3058 and several second plastic sealing sheets 3059 connected to the second square ring plate 3057. The first plastic sealing sheet 3055 is connected at only one end to the end face of the first square ring plate 3053 near the first square telescopic tube 3050, and the first plastic sealing sheet 3055 covers the several first vents 3054. The second plastic sealing sheet 3059 is connected at only one end to the end face of the second square ring plate 3057 away from the first square telescopic tube 3050, and the second plastic sealing sheet 3059 covers the second vents 3058. The sum of the areas of the several first vents 3054 is less than the sum of the areas of the several second vents 3058.

[0039] It should be noted that, as mentioned above, when the limiting slide plate 303 moves away from the wiping assembly 306, it causes the first square telescopic tube 3050 and the second square telescopic tube 3051 to extend. As the first square telescopic tube 3050 and the second square telescopic tube 3051 extend, the space between them gradually increases, thereby generating negative pressure. When the negative pressure acts on the second plastic sealing sheet 3059, it causes the second plastic sealing sheet 3059 to tightly seal the second vent hole 3058, forming a seal. When the negative pressure acts on the first plastic sealing sheet 3055, the first plastic sealing sheet 3055 begins to bend towards the area between the first square telescopic tube 3050 and the second square telescopic tube 3051, thereby opening the first vent hole 3054. At this time, the negative pressure draws the gas in the hollow plate 302 into the first square telescopic tube 3050. In the area between the second square telescopic tube 3051, the gas inside the hollow plate 302 is connected to the gas inside the shell 1. Similarly, when the limiting slide plate 303 moves toward the wiping assembly 306, it compresses the first square telescopic tube 3050 and the second square telescopic tube 3051, reducing the space between them and generating positive pressure. This positive pressure causes the first plastic sealing sheet 3055 to seal the first vent 3054, while driving the second plastic sealing sheet 3059 to bend toward the wiping assembly 306. This causes the gas to be ejected toward the wiping assembly 306, creating wind to clean the wiping assembly 306. Since the airflow through the first vent 3054 is less than that through the second vent 3058, a slow suction and rapid release effect can be achieved, effectively increasing the impact force of the airflow.

[0040] The shovel assembly 306 includes an inner square ring shovel 3060 and an outer square ring 3061 connected to one end of the hollow plate 302, and an annular filter screen 3062 slidably connected between the inner square ring shovel 3060 and the outer square ring 3061. Elastic members 3063 are connected to both the inner square ring shovel 3060 and the outer square ring 3061. The other end of each elastic member 3063 is fixedly connected to the annular filter screen 3062. The inner square ring shovel 3060 is configured to cooperate with the scraper plate 304. The space between the inner square ring shovel 3060 and the outer square ring 3061 is connected to the space between the first square telescopic tube 3050 and the second square telescopic tube 3051 through the second square annular groove 3056.

[0041] It should be noted that, as mentioned above, when the scraper plate 304 retracts into the hollow plate 302, the scum on its outer surface is scraped off by the inner square ring shovel 3060. Under the influence of gravity, the scraped scum continuously flows along the inclined surface of the inner square ring shovel 3060 into the space between the inner square ring shovel 3060 and the outer square ring 3061, gradually accumulating on the annular filter screen 3062. When the gas in the telescopic buffer assembly 305 is rapidly discharged and blown towards the filter screen, the strong airflow effectively cleans the annular filter screen 3062. The scum on the surface is blown off. When it cannot be blown off, it forms an obstruction. Gas accumulates between the annular filter screen 3062 and the second square ring plate 3057. As the amount of gas gradually increases, the pressure gradually increases. The annular filter screen 3062 is pushed and the elastic element 3063 is stretched until the pressure increases to the point that the scum can be blown off. After the gas is discharged from the filter holes of the annular filter screen 3062, the pressure decreases and the elastic element 3063 rebounds, thus forming vibration, which can further improve the cleaning effect of the gas on the scum.

[0042] Example 2

[0043] like Figure 6 As shown, an oily wastewater treatment system includes two sets of oily wastewater treatment equipment as in Example 1, an oil-water separator, a sedimentation tank, an equalization tank, a Fenton system, an anaerobic tank, an integrated biochemical treatment equipment, an oily waste tank, and a sludge tank. The oily wastewater flows sequentially through the oil-water separator, sedimentation tank, equalization tank, one set of oily wastewater treatment equipment, the Fenton system, and the other set of oily wastewater treatment equipment and the integrated biochemical treatment equipment. The oil and sludge discharged from the oil-water separator are respectively discharged into the oily waste tank and the sludge tank.

[0044] The integrated biochemical treatment equipment includes an anaerobic tank, three sets of contact oxidation tanks, an MBR membrane tank, and an effluent tank. The water discharged from another set of oily wastewater treatment equipment flows sequentially through the anaerobic tank, the first set of contact oxidation tanks, the facultative tank, the second set of contact oxidation tanks, the third set of contact oxidation tanks, the MBR membrane tank, and the effluent tank.

[0045] After the above treatment, oily wastewater can be discharged in compliance with standards.

[0046] The above description of this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. An oily wastewater treatment device, characterized in that, It includes a shell (1), a sewage inlet (101) and a scum outlet (103) on one side wall of the shell (1), a sewage outlet (102) on the other side wall of the shell (1), an exhaust pipe (107) at the upper end of the shell (1), an electrolysis component, a scum scraping mechanism and a baffle assembly inside the shell (1). The scum scraping mechanism is located directly above the electrolysis component, and the baffle assembly is located inside the shell (1) near the other side wall. The sewage inlet (101) is located directly below the scum outlet (103). The sludge scraping mechanism includes a circumferential reciprocating moving mechanism (2) connected to the inner wall of the housing (1) and a plurality of telescopic sludge scraping mechanisms (3) equidistantly connected to the circumferential reciprocating moving mechanism (2). The circumferential reciprocating moving mechanism (2) is used to drive the plurality of telescopic sludge scraping mechanisms (3) to move circumferentially back and forth between the baffle assembly and the sludge output end (103). The telescopic sludge scraping mechanism (3) is used to scrape the sludge floating on the surface of the sewage to the sludge output end (103). The telescopic slag scraping mechanism (3) includes a telescopic slag scraping assembly, a shovel assembly (306) connected to one end of the telescopic slag scraping assembly, and a telescopic buffer assembly (305) disposed inside the telescopic slag scraping assembly. One end of the telescopic buffer assembly (305) is connected to the shovel assembly (306), and the other end is connected to the internal space of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in a contracted state, the telescopic buffer assembly (305) is in a stretched state and draws in the internal gas of the telescopic slag scraping assembly. When the telescopic slag scraping assembly is in an extended state, the telescopic buffer assembly (305) is in a compressed state and discharges its internal gas into the shovel assembly (306). The shovel assembly (306) is used to shovel the outer surface of the moving part of the telescopic slag scraping assembly.

2. The oily wastewater treatment equipment according to claim 1, characterized in that, The electrolysis assembly includes a cathode assembly and an anode assembly connected to the housing (1), and the cathode assembly and anode assembly are distributed in a cross pattern.

3. The oily wastewater treatment equipment according to claim 2, characterized in that, The baffle assembly includes a lower baffle (105) connected to the inner wall of the lower end of the housing (1) and an upper baffle (106) connected to the inner wall of the upper end of the housing (1). The upper end of the upper baffle (106) is provided with a gap between it and the circumferential reciprocating moving mechanism (2). The lower end of the upper baffle (106) is provided with a gap between it and the inner wall of the lower end of the housing (1). The upper baffle (106) is located between the lower baffle (105) and the sewage outlet end (102).

4. The oily wastewater treatment equipment according to claim 3, characterized in that, The reciprocating circumferential moving mechanism (2) includes a motor connected to the outer wall of the housing (1), two rotating shafts (201) movably connected to the inner wall of the housing (1), sprockets (202) connected to the rotating shafts (201), and a chain (203) connected between the sprockets (202). One of the rotating shafts (201) is connected to the output shaft end of the motor, and several of the telescopic slag scraping mechanisms (3) are equidistantly connected to the chain (203).

5. The oily wastewater treatment equipment according to claim 4, characterized in that, The telescopic slag scraper assembly includes a connecting frame (301), a hollow plate (302) connected to the lower end of the connecting frame (301), a movable chamber (3020) disposed inside the hollow plate (302), a limiting slide plate (303) slidably connected to the inner wall of the movable chamber (3020), and a slag scraper (304) connected to the limiting slide plate (303). One end of the slag scraper (304) penetrates one end of the hollow plate (302), and the other end of the hollow plate (302) is connected to the connecting frame (301). The other end of the hollow plate (302) is provided with a perforation (3021), and the movable chamber (3020) communicates with the internal space of the shell (1) through the perforation (3021).

6. The oily wastewater treatment equipment according to claim 5, characterized in that, The telescopic buffer assembly (305) includes a first square telescopic tube (3050) and a second square telescopic tube (3051) connected between the limiting slide plate (303) and the inner wall of one end of the hollow plate (302); a first square annular groove (3052) provided on the limiting slide plate (303); a first square annular plate (3053) connected to the inner wall of the first square annular groove (3052); a plurality of first vent holes (3054) provided on the first square annular plate (3053); a plurality of first plastic sealing sheets (3055) connected to the first square annular plate (3053); a second square annular groove (3056) provided at one end of the hollow plate (302); a second square annular plate (3057) connected to the inner wall of the second square annular groove (3056); and a second square annular plate (3057) provided on the second square annular plate (3057). The system includes several second vent holes (3058) and several second plastic sealing sheets (3059) connected to the second square ring plate (3057). The first plastic sealing sheet (3055) is connected at only one end to the end face of the first square ring plate (3053) near the first square telescopic tube (3050), and the first plastic sealing sheet (3055) covers the several first vent holes (3054) respectively. The second plastic sealing sheet (3059) is connected at only one end to the end face of the second square ring plate (3057) away from the first square telescopic tube (3050), and the second plastic sealing sheet (3059) covers the several second vent holes (3058) respectively. The sum of the areas of the several first vent holes (3054) is less than the sum of the areas of the several second vent holes (3058).

7. The oily wastewater treatment equipment according to claim 6, characterized in that, The shovel assembly (306) includes an inner square ring shovel (3060) and an outer square ring body (3061) connected to one end of the hollow plate (302), and an annular filter screen (3062) slidably connected between the inner square ring shovel (3060) and the outer square ring body (3061). Both the inner square ring shovel (3060) and the outer square ring body (3061) are connected to elastic elements (3063), and the other end of each elastic element (3063) is fixedly connected to the annular filter screen (3062). The inner square ring shovel (3060) is configured to cooperate with the scraper plate (304). The space between the inner square ring shovel (3060) and the outer square ring body (3061) is connected to the space between the first square telescopic tube (3050) and the second square telescopic tube (3051) through a second square annular groove (3056).

8. An oily wastewater treatment system, characterized in that, It includes two sets of oily wastewater treatment equipment as described in any one of claims 1-7, an oil-water separator, a sedimentation tank, an equalization tank, a Fenton system, an anaerobic tank, an integrated biochemical treatment equipment, an oily waste tank, and a sludge tank. The oily wastewater flows sequentially through the oil-water separator, the sedimentation tank, the equalization tank, one set of oily wastewater treatment equipment, the Fenton system, and the other set of oily wastewater treatment equipment and the integrated biochemical treatment equipment. The oil and sludge discharged from the oil-water separator are respectively discharged into the oily waste tank and the sludge tank.

9. The oily wastewater treatment system according to claim 8, characterized in that, The integrated biochemical treatment equipment includes an anaerobic tank, three sets of contact oxidation tanks, an MBR membrane tank, and an effluent tank. Water discharged from another set of oily wastewater treatment equipment flows sequentially through the anaerobic tank, the first set of contact oxidation tanks, the facultative tank, the second set of contact oxidation tanks, the third set of contact oxidation tanks, the MBR membrane tank, and the effluent tank.

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