Sewage water inlet treatment and oil removal system

Abstract

The application discloses a sewage inlet treatment and oil removal system, which comprises a sewage treatment tank, a plurality of inclined plates are arranged in groups between an inlet end and an outlet end in the sewage treatment tank, the inclined plates are arranged along the water flow direction and are spaced apart along the width direction, an oil removal device is arranged above the inclined plates, characterized in that outer water baffle plates are arranged along the vertical direction on both sides of the sewage treatment tank, the outer water baffle plates are hollow and form a sludge sliding channel in the inner cavity, the lower end of the sludge sliding channel is communicated with a sewage discharge pipe, a slotted gap is arranged on the upper surface of the inclined plate at the joint between the inner side of the outer water baffle plate and the inclined plate, a downward triangular sludge collecting hopper is further arranged at the lower end of the sewage treatment tank, the lower end of the inclined plate which is not in contact with the outer water baffle plate is located above the sludge collecting hopper, the space between the inclined plates is directly communicated with the sludge collecting hopper at the lower end, and the sludge collecting hopper is communicated with the sewage discharge pipe. The scheme has the advantages of higher oil removal and sewage removal efficiency, better effect, automatic adjustment according to the amount of floating oil, more convenient use and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment equipment, in particular to a sewage inlet treatment and oil removal system. BACKGROUND

[0002] Urban domestic sewage and enterprise factory production and processing wastewater are usually discharged to a sewage treatment plant for treatment. Oil stains are often mixed into the sewage inlet of the treatment plant, especially in the sewage treatment plants in areas with a high concentration of industries, a large amount of production industrial wastewater oil stains often flow in irregularly. It is difficult to achieve the degradation and treatment of oil stains by using conventional sewage treatment processes, and the presence of oil stains can cause great pollution and influence to the filtration and biochemical treatment links, especially for the sewage treatment plants using MBR process, which brings great trouble to the operation of the treatment plant.

[0003] The sewage plant usually uses an oil separation tank to treat sewage oil stains. The oil separation tank is a wastewater pretreatment structure that uses the density difference between oil droplets and water to produce an upward floating effect to remove floatable oil substances in oil-containing wastewater. The structure of the oil separation tank is usually horizontal flow type. The oil-containing wastewater enters the horizontal flow type oil separation tank through a water distribution tank, flows slowly along the horizontal direction, and the oil floats to the water surface during the flow, and is pushed into the oil collection pipe by an oil scraping machine or an oil scraping machine arranged on the tank surface. In the oil separation tank, the heavy oil and other impurities deposited at the bottom of the tank are accumulated into the sludge hopper, and then enter the sludge pipe through the sludge discharge pipe. The wastewater treated by the oil separation tank is overflowed into the drainage channel outside the tank for subsequent treatment to remove emulsified oil and other pollutants.

[0004] In order to improve the oil removal effect, the prior art also has a counter-flow inclined plate (inclined pipe) type oil separation tank, which increases the inclined partition plate to separate the water flow space, which is more conducive to the upward accumulation of floating oil. However, the conventional counter-flow inclined plate (inclined pipe) oil separation tank still has the defects of complex structure, high tank body, difficult civil engineering, easy re-mixing of oil and water, and relatively poor oil removal and decontamination.

[0005] Therefore, it is necessary to design an oil-containing sewage treatment equipment with higher oil removal and decontamination efficiency, better effect and more convenient use. SUMMARY

[0006] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present application is: how to provide a sewage inlet treatment and oil removal system with higher oil removal and decontamination efficiency, better effect and more convenient use.

[0007] In order to solve the above technical problems, the present application adopts the following technical scheme.

[0008] The system comprises a sewage treatment tank, a sewage inlet pipe arranged at the inlet end of the sewage treatment tank, a plurality of inclined plates arranged in groups between the inlet end and the outlet end of the sewage treatment tank, and an oil removal device arranged above the inclined plates. The system is characterized in that: outer water baffle plates are arranged vertically at the two sides of the sewage treatment tank, the outer water baffle plates are hollow and form a sludge sliding channel in the inner cavity, the lower end of the sludge sliding channel is communicated with a sewage discharge pipe, the inclined plates are arranged downwardly and outwardly and fixed at the lower end of the outer water baffle plates, and a gap is arranged on the inner side of the outer water baffle plate and the upper surface of the inclined plate. A sludge collecting hopper in the shape of a downwardly pointing triangle is arranged at the lower end of the sewage treatment tank, the lower end of the inclined plates not in contact with the outer water baffle plates is above the sludge collecting hopper, and the space between the inclined plates is directly communicated with the sludge collecting hopper.

[0009] In this way, the sewage is forced to flow through the narrow flow space formed by the inclined plates, so as to slow down the flow rate of the sewage and make the sludge precipitate downward and the oil float upward. The sludge precipitated on most of the inclined plates can slide into the sludge sliding channel and be discharged, and the remaining sludge can be collected by the sludge collecting hopper and then discharged. Thus, the sludge discharge channel is increased, the sludge discharge is smooth, and the sludge is prevented from mixing with the sewage again during the sludge discharge process. The water is supplied from the lower end to the upper end, so as to reduce the water disturbance, avoid the water drop and air entrainment, and facilitate the smooth flow of the water in the tank, the sludge precipitation and the oil floating.

[0010] Further, a flow regulation chamber is arranged at the inlet end of the sewage treatment tank, flow regulation and distribution hole plates are arranged in front of and behind the inclined plates along the width direction of the tank, and water passing holes are arranged on the flow regulation and distribution hole plates.

[0011] In this way, the flow regulation and uniform water distribution effect is better, the smooth flow of the sewage in the inclined plate area is better ensured, and the sludge precipitation and oil floating are more favorable.

[0012] Further, an overflow weir is arranged at the upper position of the outlet end of the sewage treatment tank, and an outlet pipe is connected to the outlet of the overflow weir.

[0013] In this way, the water in the tank is prevented from being disturbed.

[0014] Further, an adjustable weir plate is vertically and slidably arranged at the inlet side of the overflow weir, and a weir plate lifting and adjusting mechanism is arranged between the adjustable weir plate and the tank wall. In this way, the overflow discharge can be adjusted to adapt to the water level.

[0015] Further, the weir plate lifting adjusting mechanism comprises a vertically arranged nut fixed on the weir plate, and further comprises an adjusting screw rod rotatably positioned on the pool wall and having a lower end matched in the nut, and an adjusting handle arranged on an upper end of the adjusting screw rod.

[0016] In this way, the weir plate can be conveniently adjusted up and down by rotating the screw rod and relying on the screw rod nut transmission, which is very convenient and fast.

[0017] Further, the inner lower end of the sludge collecting hopper is further provided with a sewage suction pipeline, the outer lower side of the sewage suction pipeline is provided with a sewage suction aperture, the sewage suction pipeline is connected to the pool body outside and communicates with a sewage discharge pipe, and a sludge pump is installed on the sewage discharge pipe.

[0018] In this way, the sludge pump can be used to suck away the sludge deposited in the sludge collecting hopper in a suction manner, so as to avoid the interference of sewage discharge on the water body. In implementation, the lower end of the sludge sliding channel can be treated in the same way, which is not described in detail here.

[0019] Further, the sludge collecting hopper is divided into a plurality of sludge separating plates arranged in the width direction along the length direction. In this way, the sludge collecting hopper is divided in the length direction, so that mutual disturbance during sludge discharge can be better avoided.

[0020] Further, the sludge collecting hopper further has backwashing pipes arranged in the length direction on both sides of the upper part, the backwashing pipes are connected to a backwashing water source pipeline, and the backwashing pipes are provided with apertures for water washing.

[0021] In this way, the backwashing pipeline can be opened for backwashing when needed, so that the sludge collecting hopper can be better cleaned and the sewage suction pipeline can be better prevented from being blocked.

[0022] Further, the oil removal device comprises a fixed oil separating plate arranged between the upper ends of both sides of the pool body in the width direction, and further comprises an oil collecting pipe arranged on the upstream side of the fixed oil separating plate in the width direction, the upstream side of the oil collecting pipe is provided with an oil inlet opening, and the oil collecting pipe is connected to an oil discharge pipeline.

[0023] In this way, the fixed oil separating plate is used to block the floating oil to make it gather, and then the oil collecting pipe is used to collect the oil into the oil discharge pipeline. Compared with the existing oil-water counter-flow treatment method, the disturbance caused by the floating oil can be better avoided, and the oil removal effect can be better improved.

[0024] Further, the oil collecting pipe is rotatably arranged. In this way, the position of the oil inlet opening can be conveniently adjusted as needed.

[0025] Further, a horizontal rod is transversely fixedly arranged at a position adjacent to the upstream end of the oil collecting pipe, and a row of oil-wet and water-repellent materials in a floating state are fixedly arranged on the horizontal rod.

[0026] In this way, the oil can be better gathered by the floating oil-repellent hydrophobic material, and the oil can be gathered to the oil collecting pipe for discharge.

[0027] Further, the crossbar is suspended above the sewage surface, and the oil-repellent hydrophobic material (density consistent with or slightly greater than that of the oil) is suspended in the water between the crossbar and the oil collecting pipe.

[0028] In this way, the crossbar itself does not affect the water flow, and it is more convenient to lock the oil by the oil-repellent hydrophobic material suspended in the water between the crossbar and the oil collecting pipe when the amount of oil is small, so as to prevent the oil from escaping with the water flow beyond the oil collecting pipe and the oil separation plate. At the same time, the oil-repellent hydrophobic material suspended in the water between the crossbar and the oil collecting pipe also raises the oil surface at this position, and the oil collecting pipe can be adjusted in rotation, so that the oil can be conveniently adjusted to enter the oil collecting pipe when the amount of oil is small, and the sewage cannot enter the oil collecting pipe. Better oil collection is achieved.

[0029] Further, a movable oil separation plate is further arranged below the upstream side of the fixed oil separation plate, and the movable oil separation plate is arranged to be slidable up and down. An adjusting float is fixedly arranged at a middle position of the upstream side of the movable oil separation plate, and the specific gravity of the adjusting float and the movable oil separation plate as a whole is between water and oil.

[0030] In this way, because the water amount can be controlled by the water inlet gate valve during equipment processing, the water level is ensured to be at the required working water level, and therefore the positions of the oil collecting pipe and the fixed oil separation plate can remain unchanged. However, the oil content in the sewage source cannot be controlled, and sometimes the oil content in the sewage is high, which can cause the oil layer above the oil separation tank to be very thick, but when the oil content in the sewage is low, the oil layer can be relatively thin, and the thickness can change greatly. Therefore, if the fixed oil separation plate is too short, the oil can easily flow out when the oil content is large, but if the fixed oil separation plate is too long, it can interfere with the normal flow of the sewage when the oil content is small. Therefore, the applicant creatively designs a movable oil separation plate below the fixed oil separation plate, which can float up and down. In this way, the lower end of the movable oil separation plate is always at a fixed suitable depth in the water body, and the suitable depth does not change with the change of the oil thickness. Therefore, the perfect interception effect of the oil can be achieved without interfering with the water flow to the greatest extent under any circumstances.

[0031] Further, limit blocks are arranged on the pool body side walls on the front and rear sides of the movable oil separation plate, so as to limit the front and rear positions of the movable oil separation plate.

[0032] Furthermore, the float is hollow with an opening at the top that is sealed with a screw-on cap. This allows for the addition or removal of a counterweight within the float's interior, adjusting the gravity as needed. This, in turn, adjusts the depth of the movable oil separator's lower end within the water, ensuring it is positioned to perfectly intercept oil spills without disrupting water flow.

[0033] Furthermore, multiple sets of the oil removal device are arranged along the length of the pool body. This allows for better oil removal.

[0034] Furthermore, the inclined plates are arranged in groups along the length direction, with each inclined plate group having symmetrically arranged left and right sides. Several fixing ribs are provided on the end faces of the inclined plates, and the two ends of each inclined plate are fixed to the fixing ribs to form a whole. This facilitates the overall assembly of the inclined plate group.

[0035] In summary, this solution has advantages such as higher oil and dirt removal efficiency, better results, automatic adjustment according to the amount of floating oil, and greater ease of use. Attached Figure Description

[0036] Figure 1 This is a simplified planar structural diagram of the wastewater influent treatment sedimentation and oil removal system of the present invention. The arrows in the diagram indicate the flow direction.

[0037] Figure 2 for Figure 1 A schematic diagram of AA.

[0038] Figure 3 for Figure 1 A schematic diagram of BB.

[0039] Figure 4 for Figure 2 A schematic diagram of the structure of a separate oil removal device.

[0040] Figure 5 for Figure 2 A schematic diagram of the structure of a separate rectifier and distribution orifice plate. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings.

[0042] Detailed implementation methods: such as Figures 1 to 5As shown, a sewage water inlet treatment and oil removal system, comprising a sewage treatment tank 1, one end of the sewage treatment tank 1 is an inlet end, the other end is an outlet end, the inlet end of the sewage treatment tank 1 is provided with a sewage inlet pipe 7, the sewage inlet pipe 7 is connected below the inlet end of the sewage treatment tank from bottom to top; a plurality of inclined plates 2 are arranged in groups between the inlet end and the outlet end in the sewage treatment tank, each inclined plate 2 is arranged along the water flow direction and is spaced apart along the width direction, an oil removal device is arranged above the inclined plate 2, wherein the both sides of the sewage treatment tank 1 are provided with outer water baffle plates 3 along the vertical direction, the outer water baffle plates 3 are hollow and the inner cavities form a sludge sliding channel 4, the lower end of the sludge sliding channel 4 is communicated with a sewage discharge pipe 5, the outer side of the inclined plate 2 is arranged downwardly and the lower end is fixed on the outer water baffle plate 3, the inner side of the outer water baffle plate 3 and the junction with the inclined plate 2 are located on the upper surface of the inclined plate and are provided with a slotted opening; a sludge collecting hopper 6 in the shape of a downward triangle is further arranged at the lower end of the sewage treatment tank, the lower end of the inclined plate which is not in contact with the outer water baffle plate is located above the sludge collecting hopper and the space between the inclined plates is directly communicated with the sludge collecting hopper 6, the sludge collecting hopper is communicated with the sewage discharge pipe 5.

[0043] In this way, after the sewage flows through the inclined plates in the tank body, it is forcibly divided into several narrow flow spaces by the inclined plates, so as to slow down the flow rate of the sewage and better make the sludge precipitate downward and the oil float upward. Since the sludge sliding channel is separately arranged on the outer side of the inclined plate, most of the sludge precipitated on the inclined plate can slide into the sludge sliding channel and be discharged outside, and the remaining sludge is collected through the sludge collecting hopper below the tank body and then discharged outside. Therefore, the sludge discharge channel is increased, the sludge discharge smoothness is improved, and the sludge is prevented from mixing with the sewage again during the sludge discharge process, so as to avoid the deterioration of the sewage treatment effect. The water inlet from the lower end upward can reduce the water inlet interference and avoid the water drop with air, which is beneficial to the smooth flow of the water in the tank body and is more conducive to the sludge sedimentation and the oil floating.

[0044] The inlet end of the sewage treatment tank 1 is further provided with a flow regulating cavity, a flow regulating water distribution hole plate 9 is arranged between the flow regulating cavity and the inclined plate 2 along the width direction of the tank body, and uniform water passing holes 10 are arranged on the flow regulating water distribution hole plate 9.

[0045] In this way, the flow regulating and uniform water distribution effects can be better achieved, the smooth flow of the sewage in the inclined plate area can be better ensured, and the sludge sedimentation and the oil floating can be more conducive.

[0046] The upper part of the outlet end of the sewage treatment tank 1 is provided with an overflow weir 11, and the outlet of the overflow weir 11 is connected with an outlet pipe 12.

[0047] In this way, the overflow water outlet is adopted, which is more conducive to avoiding the disturbance of the water in the tank body.

[0048] The inlet side of the overflow weir 11 is vertically slidably provided with an adjustable weir plate 13, and a weir plate lifting and adjusting mechanism is further arranged between the adjustable weir plate 13 and the tank wall. In this way, the overflow water outlet can be adjusted to adapt to the water level.

[0049] The weir plate lifting adjusting mechanism comprises a vertically arranged nut 14 fixed to the weir plate, and an adjusting screw 15 rotatably positioned on the pool wall and having its lower end fitted into the nut, and the upper end of the adjusting screw 15 is further provided with an adjusting handle.

[0050] In this way, the weir plate can be conveniently adjusted up and down by rotating the screw and relying on the screw nut transmission, which is very convenient and fast.

[0051] The inside lower end of the sludge collecting hopper 6 is further provided with a sewage suction pipeline 16, and the outside lower side of the sewage suction pipeline 16 is provided with a sewage suction aperture, and the sewage suction pipeline is connected to the pool body outside and communicates with the sewage discharge pipeline 5, and the sewage pump is installed on the sewage discharge pipeline 5 (not shown in the figure).

[0052] In this way, the sludge pump can be used to suck away the sludge deposited in the sludge collecting hopper by suction, avoiding the interference of sewage discharge on the water body. In implementation, the lower end of the sludge sliding channel can be treated in the same way, which will not be described in detail here.

[0053] The inside of the sludge collecting hopper is further provided with a plurality of sludge separating plates 17 arranged along the width direction and separated along the length direction. In this way, the sludge collecting hopper is separated along the length direction, which can better avoid mutual disturbance during sludge discharge.

[0054] The upper part of the sludge collecting hopper is further provided with backwashing pipes 18 arranged along the length direction on both sides, the backwashing pipes 18 are connected to the backwashing water source pipeline outside, and the backwashing pipes are provided with apertures for water washing.

[0055] In this way, the backwashing pipeline can be opened for backwashing when needed, which can better clean the sludge collecting hopper and avoid blockage of the sewage suction pipeline.

[0056] The oil removal device, as shown in Figure 4 , comprises a fixed oil separating plate 19 arranged between the upper ends of both sides of the pool body cavity along the width direction, and further comprises an oil collecting pipeline 20 arranged on the upstream side of the fixed oil separating plate 19 along the width direction, the upstream side of the oil collecting pipeline 20 is provided with an oil inlet opening, and the oil collecting pipeline 20 is connected to the oil discharge pipeline 21.

[0057] In this way, the fixed oil separating plate is used to block the floating oil and make it gather, and then the oil collecting pipeline is used to collect the oil and discharge it to the oil discharge pipeline. Compared with the existing oil-water different flow treatment method, the disturbance caused by the floating oil can be better avoided, and the oil removal effect can be better improved.

[0058] The oil collecting pipeline 20 is rotatably arranged. In this way, the position of the oil inlet opening can be conveniently adjusted according to needs. In implementation, the end of the oil collecting pipeline 20 is connected to the oil discharge pipeline 21 through a rotatable sealing connector, realizing the rotating adjustment function of the oil collecting pipeline 20.

[0059] The upstream end of the oil collecting pipe 20 is also provided with a horizontal rod 22 adjacent thereto, and a row of oil-wetted hydrophobic material 27 in the shape of floating fibers is fixed on the horizontal rod 22.

[0060] In this way, the oil-wetted hydrophobic material in the shape of floating fibers can better converge the floating oil and gather it to the oil collecting pipe for collection and discharge.

[0061] The horizontal rod 22 is suspended above the adjacent position of the sewage surface, and the oil-wetted hydrophobic material 27 (with a density consistent with or slightly greater than that of the floating oil) is suspended in the water body between the horizontal rod and the oil collecting pipe.

[0062] In this way, the horizontal rod itself does not affect the water flow, and it is more convenient to lock the floating oil by the oil-wetted hydrophobic material suspended in the water body between the horizontal rod and the oil collecting pipe when the amount of floating oil is small, so as to prevent the floating oil from escaping with the water flow beyond the oil collecting pipe and the oil separation plate. At the same time, the oil-wetted hydrophobic material suspended in the water body between the horizontal rod and the oil collecting pipe also raises the surface of the floating oil at this position, and in combination with the structure of the oil collecting pipe that can be adjusted in rotation, the floating oil can be conveniently adjusted to enter the oil collecting pipe while the sewage cannot, so as to better achieve floating oil collection.

[0063] The upstream side of the fixed oil separation plate is also provided with a movable oil separation plate 23 adjacent to the lower side, and the movable oil separation plate is slidably arranged. An adjusting float 24 is fixedly arranged at the middle position of the upstream side of the movable oil separation plate 23, and the overall specific gravity of the adjusting float 24 and the movable oil separation plate 23 is between that of water and oil.

[0064] In this way, because the amount of water can be controlled by the water inlet gate valve during equipment processing to ensure that the water level is at the required working water level, the positions of the oil collecting pipe and the fixed oil separation plate can remain unchanged. However, the oil content in the sewage source cannot be controlled, and sometimes a high oil content in the sewage will result in a very thick oil layer above the oil separation tank, but a low oil content in the sewage will result in a thin oil layer, and the thickness varies greatly. Therefore, if the fixed oil separation plate is too short, it will easily cause oil leakage when the oil content is high, but if it is too long, it will interfere with the normal flow of the sewage when the oil content is low. Therefore, the applicant creatively designs a movable oil separation plate that can float up and down below the fixed oil separation plate, so that the lower end of the movable oil separation plate is always at a fixed suitable depth in the water body, and the suitable depth does not change with the change in the thickness of the oil. Therefore, it can ensure that the oil can be perfectly intercepted without interfering with the water flow to the greatest extent under any circumstances.

[0065] Limiting blocks 25 are further arranged on the pool body side walls on the front and rear sides of the movable oil separation plate 23 to facilitate limiting the front and rear positions thereof.

[0066] The adjusting float 24 is hollow and has an opening at the upper end, and the opening is sealed by a cover 26. In this way, the adjusting float is filled with a weight adjusting material. When necessary, the weight can be adjusted by increasing or decreasing the weight adjusting material, so as to adjust the depth of the lower end of the movable oil separation plate into the water body, so that the movable oil separation plate is just in a position where the oil can be perfectly intercepted and the water flow is not disturbed.

[0067] The oil removal device is arranged in multiple groups along the length direction of the pool body, so that the oil removal can be better achieved.

[0068] The inclined plates 2 are arranged in groups along the length direction and are symmetrically arranged left and right in each group. A plurality of fixing ribs are arranged on the end faces of the inclined plates, and the two ends of each inclined plate are fixed on the fixing ribs to form an integral whole. In this way, the integral assembly of the inclined plate group is facilitated.

Claims

1. A sewage inlet treatment and oil removal system, comprising a sewage treatment tank, a sewage inlet pipe being arranged at an inlet end of the sewage treatment tank and being communicated with the sewage treatment tank below the inlet end, a plurality of inclined plates being arranged in groups between the inlet end and an outlet end of the sewage treatment tank, each of the inclined plates being arranged along a water flow direction and being spaced apart along a width direction, and an oil removal device being arranged above the inclined plates, characterized in that, The outer baffle plate is hollow and has a sludge sliding channel in the inner cavity, the lower end of the sludge sliding channel is communicated with the sewage pipe, the outer side of the inclined plate is downwardly inclined and the lower end is fixed on the outer baffle plate, the joint between the inner side of the outer baffle plate and the inclined plate is located on the upper surface of the inclined plate and is provided with a slotted opening, the lower end of the inclined plate not in contact with the outer baffle plate is located above the sludge collecting hopper, the space between the inclined plates is directly communicated with the sludge collecting hopper, and the sludge collecting hopper is communicated with the sewage pipe.

2. The sewage water inlet treatment sedimentation oil removal system according to claim 1, characterized in that, The water inlet end of the sewage treatment tank is further provided with a flow regulating chamber, and a flow regulating water distribution hole plate is arranged between the flow regulating chamber and the inclined plate in the front-rear direction along the width of the tank body.

3. The system as claimed in claim 1, wherein the said system is a sewage water inlet treatment and sedimentation oil removal system. An overflow weir is arranged at the upper position of the water outlet end of the sewage treatment tank, and the water outlet of the overflow weir is connected with an outlet pipe.

4. The system according to claim 3, wherein the water inlet is disposed at a position where the water is introduced into the water tank. An adjustable weir plate is vertically slidably arranged on the water inlet side of the overflow weir, and a weir plate lifting adjusting mechanism is further arranged between the adjustable weir plate and the tank wall.

5. The system for treating and removing oil from wastewater according to claim 4, wherein The weir plate lifting adjusting mechanism comprises a vertically arranged nut fixed on the weir plate, and a adjusting screw rod rotatably positioned on the tank wall and fitted into the nut at the lower end, and an adjusting handle is further arranged on the upper end of the adjusting screw rod.

6. The system for treating and removing oil from wastewater according to claim 1, wherein A sewage suction pipeline is further arranged at the inner lower end of the sludge collecting hopper, and a sewage suction aperture is formed on the outer lower side of the sewage suction pipeline.

7. The system as claimed in claim 6, wherein the water inlet treatment and oil removal system is characterized by, A plurality of sludge separating plates arranged in the width direction are arranged in the sludge collecting hopper in the length direction.

8. The system as claimed in claim 6, wherein the said system is a sewage water inlet treatment and sedimentation oil removal system. Anti-backwashing pipes arranged in the length direction are further arranged on both sides of the upper part of the sludge collecting hopper, the anti-backwashing pipes are connected to an anti-backwashing water source pipeline, and a plurality of holes for water washing are formed on the anti-backwashing pipes.

9. The system for treating and removing oil from wastewater according to claim 1, wherein The oil removal device comprises a fixed oil separating plate arranged between both sides of the upper end of the inner cavity of the tank body in the width direction, and a oil collecting pipeline arranged on the upstream side of the fixed oil separating plate in the width direction, wherein an oil inlet opening is arranged on the upstream side of the oil collecting pipeline, and the oil collecting pipeline is connected with an oil discharge pipeline.

10. The system for treating and removing oil from wastewater according to claim 9, wherein The oil collecting pipeline is rotatably arranged; A horizontal rod is transversely fixedly arranged at the adjacent position of the upstream end of the oil collecting pipeline, and a plurality of oil-wet and water-repellent materials in the shape of floating fibers are fixedly arranged on the horizontal rod; The horizontal rod is suspended above the adjacent position of the water surface, and the oil-wet and water-repellent materials are suspended in the water between the horizontal rod and the oil collecting pipeline; A movable oil separating plate is further arranged on the upstream side of the fixed oil separating plate, the movable oil separating plate is slidably arranged, an adjusting float is fixedly arranged at the middle position of the upstream side of the movable oil separating plate, and the specific gravity of the adjusting float and the movable oil separating plate as a whole is between water and oil; Limiting blocks are further arranged on the tank body side walls on both sides of the movable oil separating plate; The adjusting float is hollow, an opening is arranged at the upper end of the adjusting float, and a cover is sealingly screwed to the opening; A plurality of groups of the oil removal device are arranged in the length direction of the tank body.

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