Oily wastewater treatment system

Abstract

The invention discloses an oily wastewater treatment system which comprises a barrel, an adjusting unit and an oil removal unit, the adjusting unit is provided with a lifting end, and the lifting end is arranged in the barrel in a penetrating mode and can move relative to the barrel; the oil removal unit comprises oil-water separation pieces and an oil discharge piece, at least one oil-water separation piece is connected with the lifting end, the oil-water separation pieces can adsorb oil stains in wastewater, the oil absorption piece is connected with the cylinder, and the oil discharge piece is connected with the oil absorption piece. The lifting end can drive the oil-water separation part to move upwards, so that the oil-water separation part is in contact with the oil discharge part, and the oil discharge part absorbs oil stains on the oil-water separation part. The problem that in the prior art, when oil-containing wastewater is treated, oil stains are difficult to remove is solved.

Description

Technical Field

[0001] The invention relates to the technical field of oily wastewater treatment, and in particular to an oily wastewater treatment system. Background Art

[0002] Relevant policies in my country point out that we need to accelerate the dismantling and renovation of substandard ships, and build sewage shipboard storage facilities for ships that are not equipped with sewage treatment facilities, are not in normal use, and do not meet storage requirements.

[0003] Existing cargo ships treat oily wastewater such as ballast water, tank washing water, and bilge water by usually recycling the oily wastewater on the cargo ships, and then the relevant ship wastewater treatment companies transport the collected oily wastewater back to the treatment plant; the oil substances in the oily wastewater are usually highly stable and not easily degraded or decomposed. After the oily wastewater is treated by the commonly used sewage treatment process, some oil and water may still exist in the wastewater, especially oil droplets below 10μm are difficult to remove. The discharge of oily wastewater will cause harm to the ecological environment and human health. Summary of the invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide an oily wastewater treatment system to solve the problem that oil stains are difficult to remove when treating oily wastewater in the prior art.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an oily wastewater treatment system, comprising: Cylinder; an adjusting unit, the adjusting unit having a lifting end, and the lifting end is disposed in the cylinder and can move relative to the cylinder; and The oil removal unit includes an oil-water separator and an oil discharge member, at least one of the oil-water separators is connected to the lifting end, the oil-water separator can absorb oil in the wastewater, the oil absorption member is connected to the cylinder, the lifting end can drive the oil-water separator to move upward so that the oil-water separator contacts the oil discharge member, so that the oil discharge member can absorb the oil on the oil-water separator.

[0006] In some embodiments, the oil-water separator comprises an oil absorption plate, one side of the oil absorption plate is fixedly connected to the lifting end, and an oil absorption layer is provided on the surface of the oil absorption plate.

[0007] In some embodiments, the oil absorption plate is fan-shaped as a whole, and a plurality of protrusions are concentrically arranged on the oil absorption plate, a recess is formed between two adjacent protrusions, and a side of the oil absorption plate corresponding to the central angle is fixedly connected to the lifting end.

[0008] In some embodiments, the oil discharge member includes a mounting seat, an oil suction nozzle and an oil pump. The mounting seat is movably arranged in the cylinder, and the oil suction nozzles are fixed on the mounting seat at intervals. Multiple oil suction nozzles are connected to the oil pump, and each of the oil suction nozzles can extend into each recessed portion respectively.

[0009] In some embodiments, the lifting end includes a rotating shaft and a stirring part, one end of the rotating shaft is inserted into the cylinder, and one end of the rotating shaft is connected to the stirring part, and at least one oil absorption plate is fixedly connected to the rotating shaft.

[0010] In some embodiments, the adjusting unit also includes the first driving part, a turbine and a worm, the first driving part is connected to the cylinder, the turbine is connected to the output shaft of the first driving part, the worm is arranged on the rotating shaft, and the worm is meshed with the turbine, and the turbine is driven to rotate by the first driving part to drive the rotating shaft to move relative to the cylinder.

[0011] In some embodiments, the adjusting unit also includes a second driving part and a rotating shaft, the output shaft of the second driving part is connected to one end of the rotating shaft, the side wall of the rotating shaft is provided with a limit block along the axial direction, the upper end of the rotating shaft is provided with a through hole along the axis, and at least one limit groove is provided inside the through hole, and when the other end of the rotating shaft is passed through the through hole, the limit block can be clamped in the limit groove.

[0012] In some embodiments, a butterfly centrifugal separator is further included, and a liquid outlet of the butterfly centrifugal separator is connected to a liquid inlet of the cylinder.

[0013] In some embodiments, a distillation unit is also included, which includes a distillation box, a heating part and a heat exchange tube. An evaporation chamber and a condensation chamber are provided in the distillation box. The evaporation chamber is connected to the liquid outlet of the cylinder. The heat exchange tube is passed through the condensation chamber and one end is connected to the top of the evaporation chamber, and the other end extends to the outside of the distillation box. The heating part is provided in the evaporation chamber. In some embodiments, it also includes a reaction tank and an ozone generator, wherein the liquid inlet of the reaction tank is connected to the other end of the heat exchange tube, and the reaction tank is connected to the ozone generator. Compared with the prior art, the oil-containing wastewater treatment system provided by the present invention is arranged in the cylinder through the lifting end and can move relative to the cylinder; at least one oil-water separator is connected to the lifting end, and the oil-water separator can absorb oil in the wastewater, and the oil suction component is connected to the cylinder, and the lifting end can drive the oil-water separator to move upward so that the oil-water separator contacts the oil discharge component, and the oil suction component can effectively absorb the oil on the oil-water separator, and the process is continuously circulated to perform continuous work of oil-water two-phase separation, remove oil droplets in the wastewater, reduce the use of wastewater liquid, and make the wastewater discharge meet the national standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an oily wastewater treatment system provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the internal structure of an evaporation unit provided in an embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of the tank provided by an embodiment of the present invention; Figure 4 is a partial structural schematic diagram of a second driving unit provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the internal structure of a cylinder provided by an embodiment of the present invention; Figure 6 It is a schematic structural diagram of an oil absorption plate provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] In order to solve the technical problem that it is inconvenient to remove oil stains when treating oily wastewater in the prior art, the present invention provides an oily wastewater treatment system, which can effectively remove oil stains in wastewater so that wastewater discharge meets national standards.

[0017] See also Figure 1-Figure 6 , Figure 1-Figure 6 The present invention is an oil-containing wastewater treatment system in an embodiment of the present invention, comprising a cylinder 1, an adjusting unit 2 and an oil removal unit 3, wherein the adjusting unit 2 has a lifting end, and the lifting end is arranged in the cylinder 1 and can move relative to the cylinder 1; the oil removal unit 3 comprises an oil-water separator 31 and an oil discharge member 32, at least one of the oil-water separators 31 is connected to the lifting end, the oil-water separator 31 can absorb oil in the wastewater, the oil absorption member is connected to the cylinder 1, and the lifting end can drive the oil-water separator 31 to move upward so that the oil-water separator 31 contacts the oil discharge member 32, so that the oil discharge member 32 can absorb the oil on the oil-water separator 31.

[0018] In actual use, the oily wastewater is transported into the cylinder 1, and the lifting end is moved relative to the cylinder 1, so that the water separation element 31 moves upward to leave the liquid surface and contact the oil discharge element 32. The oil discharge element 32 can absorb the oil adsorbed on the oil-water separation element 31. The above process is continuously repeated to effectively remove the oil in the wastewater.

[0019] In one embodiment, the cylinder 1 and the butterfly centrifuge 4 are both arranged in the tank body 8, wherein the cylinder 1 is located above the butterfly centrifuge 4, the liquid outlet of the butterfly centrifuge 4 is connected to the liquid inlet of the cylinder 1, and a liquid pump is provided on the pipeline between the liquid outlet of the butterfly centrifuge 4 and the liquid inlet of the cylinder 1.

[0020] Among them, the butterfly centrifuge 4 is a highly efficient centrifugal separation equipment. The oily wastewater enters the high-speed rotating drum. Under the action of centrifugal force, components of different densities are separated, the heavy phase component settles to the inner wall of the drum, and the light phase component forms an inner layer, which is discharged from different outlets to promote solid-liquid separation. The butterfly centrifuge 4 can completely remove particles with a diameter greater than 6μm, which is sufficient to clean up impurities in the oily wastewater. At the same time, there is a liquid pump at the liquid outlet to send the oil-water mixture here to the cylinder 1 for oil-water separation.

[0021] In one embodiment, the lifting end includes a rotating shaft 21 and a stirring part 22, one end of the rotating shaft 21 is passed through the cylinder 1, and one end of the rotating shaft 21 is connected to the stirring part 22, and at least one oil absorption plate 311 is fixedly connected to the rotating shaft 21.

[0022] Among them, the stirring part 22 is a spiral stirring part, that is, it is formed by a spiral blade plate extending from the axial side of the rotating shaft 21. The stirring part 22 is driven by rotating the rotating shaft 21 to stir the wastewater, so that the wastewater can rotate at a low speed to generate a vortex, appropriately increase the shear force of the wastewater, and help to increase the probability of oil droplets colliding.

[0023] In one embodiment, the adjusting unit 2 also includes the first driving part 23, a turbine 24 and a worm 25. The first driving part 23 is connected to the cylinder 1, the turbine 24 is connected to the output shaft of the first driving part 23, the worm 25 is arranged on the rotating shaft 21, and the worm 25 is meshed with the turbine 24. The turbine 24 is driven to rotate by the first driving part 23 to drive the rotating shaft 21 to move relative to the cylinder 1.

[0024] It should be noted that the first driving part 23 is a forward and reverse motor, which drives the turbine 24 to rotate, thereby driving the rotating shaft 21 to move relative to the cylinder, so that the oil-water separator 31 can be switched below the liquid surface and above the liquid surface.

[0025] In addition, the adjusting unit 2 also includes a second driving part 26 and a rotating shaft 27, the output shaft of the second driving part 26 is connected to one end of the rotating shaft 27, the side wall of the rotating shaft 27 is provided with a limit block 271 along the axial direction, the upper end of the rotating shaft 21 is provided with a through hole along the axis, and at least one limit groove is provided inside the through hole, when the other end of the rotating shaft 27 is passed through the through hole, the limit block 271 can be clamped in the limit groove.

[0026] Specifically, the second driving unit 26 is a reduction motor, and the second driving unit 26 is fixedly arranged on the top of the tank body 8. It should be noted that the first driving part 23 and the second driving part 26 do not work at the same time. When the first driving part 23 drives the turbine 24 to rotate and the second driving part 26 stops working, the turbine 24 can push the worm 25 to drive the rotating shaft 22 to move upward, thereby driving the oil-water separator 31 to rise away from the liquid surface and contact the oil discharge part 32; when the second driving part 26 starts to work and the first driving part 23 stops working, the second driving part 26 can drive the rotating shaft 21 to rotate, and the stirring part 22 rotates with the rotating shaft 21 to stir the wastewater in the cylinder 1. In addition, the turbine 24 can push the worm 25 to drive the rotating shaft 21 to move upward, and can also drive the rotating shaft 21 to rotate around its own axis to adjust the angle of the oil absorption plate 311.

[0027] It should be noted that the oil-water separator 31 is not limited to a specific structure. In one embodiment, the oil-water separator 31 includes an oil absorption plate 311 , and one side of the oil absorption plate 311 is fixedly connected to the movable end of the rotating shaft 21 .

[0028] Specifically, the upper surface of the oil absorption plate 311 is provided with an oil absorption layer, which is a material used to absorb oil, and is usually made of a material with oleophilic and hydrophobic properties, such as absorbent felt, which is made of polypropylene through a melt-blown process and has a large oil absorption capacity (up to 10 to 20 times its own weight) and a fast oil absorption speed; therefore, the oil absorption plate 311 can easily separate oil and water.

[0029] In one embodiment, the oil absorption plate 311 is fan-shaped as a whole, and a plurality of protrusions 31a are concentrically arranged on the oil absorption plate 311, a recessed portion 31b is formed between two adjacent protrusions 31a, and the side of the oil absorption plate 311 corresponding to the central angle is fixedly connected to the rotating shaft 21.

[0030] In one embodiment, the oil discharge member 32 includes a mounting seat 321, an oil suction nozzle 322 and an oil pump 323, the mounting seat 321 is movably arranged in the cylinder 1, the oil suction nozzles 322 are fixedly arranged on the mounting seat 321 at intervals, a plurality of the oil suction nozzles 322 are connected to the oil pump 323, and each of the oil suction nozzles 322 can extend into each recessed portion 31b respectively.

[0031] Specifically, when each of the oil suction nozzles 322 can extend into each of the recessed portions 31 b , the oil pump 323 is used to evacuate the plurality of oil suction nozzles 322 , so that the oil suction nozzles 322 generate a greater suction force, and the oil suction nozzles 322 can suck away the oil layer on the oil suction plate 311 . In other embodiments, two oil absorption plates 311 are provided on the rotating shaft 21 along the axial direction and at different height layers. When the first driving part 23 drives the turbine 24 to rotate, the turbine 24 can push the worm 25 to drive the rotating shaft 21 to move upward, and can also drive the rotating shaft 21 to rotate around its own axis. The oil absorption plate 311 can contact multiple oil suction nozzles 322 as the rotating shaft 21 rotates.

[0032] It should be noted that in order to avoid a large friction between the oil suction plate 311 and the multiple oil suction nozzles 322, the mounting seat 321 is movably arranged in the cylinder 1 via multiple elastic members. When the oil suction plate 311 rotates with the rotating shaft 21 and moves upward, the oil suction plate 311 can push the mounting seat 321 to squeeze the elastic members.

[0033] On the basis of the above scheme, it also includes a distillation unit 5, which includes a distillation box 51, a heating part 52 and a heat exchange tube 53. The distillation box 51 is provided with an evaporation chamber and a condensation chamber, and the evaporation chamber is connected with the liquid outlet of the cylinder 1. The heat exchange tube 53 is penetrated in the condensation chamber and one end is connected with the top of the evaporation chamber, and the other end extends to the outside of the distillation box 51. The heating part 52 is arranged in the evaporation chamber. The heating part 52 is an electric heating rod, and the liquid outlet of the cylinder 1 is provided with a control valve.

[0034] Specifically, after the liquid in the cylinder 1 enters the evaporation chamber, under the action of the heating part 52, the liquid entering the evaporation chamber will evaporate rapidly after being heated, and then the evaporated gas will enter the condensation chamber along the heat exchange tube 53, wherein cooling water circulates in the condensation chamber, and the evaporated gas can exchange heat in the heat exchange tube 53, and the temperature of the evaporated gas will drop rapidly to condense into liquid; it should be noted that the waste water can be concentrated into oil waste water through distillation to achieve the collection effect. On the basis of the above scheme, a reaction tank 6 and an ozone generator 7 are further included. The liquid inlet of the reaction tank 6 is connected to the other end of the heat exchange tube 53 , and the reaction tank 6 is connected to the ozone generator 7 .

[0035] It should be noted that due to the complex composition of ship oily wastewater, it still contains various organic matter and microorganisms after the above treatment. Direct discharge into the water body will cause great harm to the environment, so it needs to be treated again.

[0036] During the operation of the device, the ozone generator 7 continuously ionizes the deionized water and generates ozone at the anode. The generated ozone then enters the reaction tank 6 and reacts chemically with the treated wastewater inside the reaction tank 6. Under the strong oxidizing effect of ozone, the microorganisms in the wastewater are quickly killed. At the same time, ozone will combine with organic matter in the wastewater and quickly oxidize it, thereby significantly reducing the organic matter content in the wastewater and avoiding adverse effects on natural watershed water bodies.

[0037] In one embodiment, the reaction tank 6 is also connected to the collection tank 9. The liquid outlet of the reaction tank 6 is provided with a solenoid valve. The waste water is discharged into the collection tank 9 for storage after being subjected to the strong oxidizing effect of ozone.

[0038] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: The oily wastewater is transported to the butterfly centrifugal separator 4, and the oily wastewater is centrifugally treated by the butterfly centrifugal separator 4 to clean the impurities in the oily wastewater. The liquid pump transports the oily wastewater discharged from the liquid outlet of the butterfly centrifugal separator 4 to the cylinder 1, and the second driving part 26 stops working, and the first driving part 23 drives the turbine 24 to rotate, so that the turbine 24 can push the worm 25 to drive the rotating shaft 21 to move upward, thereby driving the oil suction plate 311 to rise, and each oil suction nozzle 322 can extend into each recessed part 31b respectively. The multiple oil suction nozzles 322 are evacuated by the oil pump 323, so that the oil suction nozzles 322 generate a strong suction force, and the oil suction nozzles 322 can suck away the oil layer on the oil absorption plate 311; then, the wastewater in the cylinder 1 is transported to the evaporation chamber, the heating part 52 heats the wastewater, and the water vapor generated by the evaporation of the wastewater is transmitted to the condensation chamber through the heat exchange tube 53, the water vapor is condensed into liquid through heat exchange in the condensation chamber, and the liquid is transported to the reaction tank 6 to contact with ozone. Under the strong oxidizing effect of ozone, the microorganisms in the wastewater are quickly killed.

[0039] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An oily wastewater treatment system, characterized in that: include: Cylinder; an adjusting unit, the adjusting unit having a lifting end, and the lifting end is disposed in the cylinder and can move relative to the cylinder; and The oil removal unit includes an oil-water separator and an oil discharge member, at least one of the oil-water separators is connected to the lifting end, the oil-water separator can absorb oil in the wastewater, the oil absorption member is connected to the cylinder, the lifting end can drive the oil-water separator to move upward so that the oil-water separator contacts the oil discharge member, so that the oil discharge member can absorb the oil on the oil-water separator.

2. The oily wastewater treatment system according to claim 1, characterized in that: The oil-water separator comprises an oil absorption plate, one side of the oil absorption plate is fixedly connected to the lifting end, and an oil absorption layer is arranged on the surface of the oil absorption plate.

3. The oily wastewater treatment system according to claim 2, characterized in that: The oil absorption plate is fan-shaped as a whole, and a plurality of protrusions are concentrically arranged on the oil absorption plate, a recess is formed between two adjacent protrusions, and a side of the oil absorption plate corresponding to the central angle is fixedly connected to the lifting end.

4. The oily wastewater treatment system according to claim 3, characterized in that: The oil discharge member includes a mounting seat, an oil suction nozzle and an oil pump. The mounting seat is movably arranged in the cylinder, and the oil suction nozzles are fixedly arranged on the mounting seat at intervals. The plurality of oil suction nozzles are all connected to the oil pump, and each of the oil suction nozzles can extend into each recessed portion respectively.

5. The oily wastewater treatment system according to any one of claims 1 to 4, characterized in that: The lifting end comprises a rotating shaft and a stirring part, one end of the rotating shaft is passed through the cylinder, and one end of the rotating shaft is connected to the stirring part, and at least one oil absorption plate is fixedly connected to the rotating shaft.

6. The oily wastewater treatment system according to claim 5, characterized in that: The adjusting unit also includes the first driving part, a turbine and a worm. The first driving part is connected to the cylinder, the turbine is connected to the output shaft of the first driving part, the worm is arranged on the rotating shaft, and the worm is meshed with the turbine. The turbine is driven to rotate by the first driving part to drive the rotating shaft to move relative to the cylinder.

7. The oily wastewater treatment system according to claim 6, characterized in that: The adjusting unit also includes a second driving part and a rotating shaft, the output shaft of the second driving part is connected to one end of the rotating shaft, the side wall of the rotating shaft is provided with a limit block along the axial direction, the upper end of the rotating shaft is provided with a through hole along the axis, and at least one limit groove is provided inside the through hole, when the other end of the rotating shaft is passed through the through hole, the limit block can be clamped in the limit groove.

8. The oily wastewater treatment system according to claim 7, characterized in that: It also includes a butterfly type centrifugal separator, the liquid outlet of the butterfly type centrifugal separator is connected with the liquid inlet of the cylinder.

9. The oily wastewater treatment system according to claim 8, characterized in that: It also includes a distillation unit, which includes a distillation box, a heating part and a heat exchange tube. The distillation box is provided with an evaporation chamber and a condensation chamber. The evaporation chamber is connected with the liquid outlet of the cylinder. The heat exchange tube is passed through the condensation chamber and one end is connected with the top of the evaporation chamber, and the other end extends to the outside of the distillation box. The heating part is arranged in the evaporation chamber.

10. The oily wastewater treatment system according to claim 9, characterized in that: It also includes a reaction tank and an ozone generator. The liquid inlet of the reaction tank is connected to the other end of the heat exchange tube, and the reaction tank is connected to the ozone generator.

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