Ship oil-containing ballast water and tank washing water waste residue separation equipment and separation process thereof

Abstract

The invention relates to the technical field of water treatment, and discloses ship oil-containing ballast water and tank washing water waste residue separation equipment and a separation process thereof.The ship oil-containing ballast water and tank washing water waste residue separation equipment comprises a separation pipe, the separation pipe can rotate around the axis of the separation pipe, and an arc-shaped partition plate is arranged in the separation pipe and divides an inner cavity of the separation pipe into a demulsification cavity and a gravity separation cavity; the demulsification cavity is located above the gravity separation cavity, and the separation pipe is arranged in the longitudinal direction of the ship. According to the ship oil-containing ballast water and tank washing water waste residue separation equipment and the separation process thereof, the separation bin with the circular-arc-shaped section is used, the floating speed of oil drops and the sinking speed of waste residues are increased, the treatment efficiency is improved, meanwhile, the gravity center position of the separation pipe is kept unchanged due to the circular-arc-shaped shape, the separation pipe tends to be kept at the same position, and the separation efficiency is improved. The influence of ship rolling is small, the impact generated by transverse movement of water flow can also be reduced through the arc-shaped cross section, and the influence of ship shaking on the gravity separation efficiency is further reduced.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a ship's oil-containing ballast water, tank washing water waste residue separation equipment and a separation process thereof. Background Art

[0002] The oily ballast water and tank washing water of ships contain a large amount of petroleum pollutants, which need to be treated before discharge to meet environmental protection standards.

[0003] In the prior art, oil-water separation is mostly done by gravity separation or gravity-coarsening-filtration combined separation. In the case of gravity separation, the ship needs to remain relatively stable. If the ship shakes violently, it will interfere with the floating process of the oil droplets.

[0004] Secondly, when the temperature drops, the viscosity of the oil increases and the floating speed of the oil droplets slows down. In cold waters, the separation efficiency of gravity separation equipment may be greatly reduced due to the increase in oil viscosity, resulting in poor separation effect. Summary of the invention

[0005] The present application proposes a ship's oil-containing ballast water, tank washing water waste residue separation equipment and a separation process, which can reduce the impact of the ship's swaying on gravity separation. At the same time, the gravity separation chamber wraps the demulsification chamber. When the temperature in the demulsification chamber increases to break the emulsion, the sewage temperature in the gravity separation chamber can also be increased, so that the oil-water separation always occurs at a more suitable temperature, further ensuring the treatment efficiency.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a ship's oil-containing ballast water, tank washing water and waste residue separation equipment, including a shell, a separation tube movably connected inside the shell, the separation tube can rotate around its own axis, an arc-shaped dividing plate is provided inside the separation tube, the dividing plate divides the inner cavity of the separation tube into a demulsification chamber and a gravity separation chamber, the demulsification chamber is located above the gravity separation chamber, the separation tube is placed along the longitudinal direction of the ship, the sewage first enters the gravity separation chamber for treatment, the demulsification chamber is connected with the gravity separation chamber, the sewage treated in the gravity separation chamber is sent to the demulsification chamber for treatment, the demulsification chamber is connected with a filter chamber, and the sewage treated in the demulsification chamber is sent to the filter equipment for filtration.

[0007] Furthermore, the outer wall of the separation tube is fixedly connected with an assembly ring, which is provided with several groups, each group of assembly rings is provided with two groups of rollers, and the inner wall of the shell is provided with a supporting surface coaxial with the separation tube, and the rollers roll on the supporting surface.

[0008] Furthermore, a first overflow pipe and a first water supply pipe are provided in the gravity separation chamber, and the position of the first overflow pipe is higher than the first water supply pipe. A first interface sensor is also provided in the demulsification chamber, and the first interface sensor is used to monitor the lower interface height of the floating oil. When the first interface sensor detects that the floating oil interface drops to the lower warning value H, the drainage speed of the first water supply pipe is reduced to make the interface rise; when the floating oil interface rises to the upper warning value h, the drainage speed of the first water supply pipe is increased to make the interface drop.

[0009] Furthermore, a second interface sensor, a first overflow pipe and a second water supply pipe are provided in the demulsification chamber. The first overflow pipe is located higher than the second water supply pipe. The second interface sensor is used to monitor the lower interface height of the floating oil. When the second interface sensor detects that the floating oil interface drops to the lower warning value H, the drainage speed of the second water supply pipe is reduced to make the interface rise. When the floating oil interface rises to the upper warning value H, the drainage speed of the first water supply pipe is increased to make the interface drop.

[0010] Furthermore, it also includes an ultrafiltration chamber, a filter chamber and a discharge chamber. The shell is square. The ultrafiltration chamber, the filter chamber, the waste oil chamber and the discharge chamber are arranged at the four corners of the shell. The demulsification chamber and the gravity separation chamber are both connected to the waste oil chamber, the waste oil chamber is connected to the oil discharge head, the demulsification chamber is connected to the filter chamber through the second water supply pipe, the filter chamber is connected to the ultrafiltration chamber, the ultrafiltration chamber is connected to the discharge chamber, and the discharge chamber is connected to the drainage head.

[0011] Furthermore, a buffer seat is provided at the bottom of the shell, and two groups of buffer seats are provided to support the shell from both ends of the shell respectively. The buffer seat includes a base and a connecting plate, and the connecting plate is connected to the shell. A spring is provided between the base and the connecting plate.

[0012] Furthermore, a cylinder is provided between the base and the connecting plate, and the cylinder has a throttle valve and an inflation valve. When the throttle valve is opened, the throttle valve can play a throttling role and generate damping. When the throttle valve is closed, the height of the connecting plate can be adjusted by inflating the cylinder.

[0013] Furthermore, a slag discharge port is provided at one end of the separation tube, the slag discharge port passes through the shell, and the slag discharge port is connected to the gravity separation chamber. A notch for the slag discharge port to swing is provided at a corresponding position of the shell. A gear ring is provided on the outer wall of the separation tube, and a swing motor is provided on the shell. The output shaft of the swing motor is meshed with the gear ring through a gear.

[0014] A ship's oily ballast water and tank washing water waste residue separation process uses the above-mentioned ship's oily ballast water and tank washing water waste residue separation equipment to treat sewage.

[0015] Furthermore, when slag discharge is required, the sewage in the separation pipe is drained, the slag discharge port is opened, and then the height of both ends of the separation pipe is adjusted by the cylinder so that the end where the swing motor is located is lower, and then the swing motor is started to swing the separation pipe.

[0016] The beneficial effects of the present invention are as follows: The present application provides a ship's oil-containing ballast water, tank washing water and waste residue separation equipment and a separation process thereof, which uses a separation bin with an arc-shaped cross-section to increase the floating speed of oil droplets and the sinking speed of waste residue, thereby improving the processing efficiency. At the same time, the arc-shaped shape keeps the center of gravity of the separation tube unchanged, and the orientation of the separation tube tends to remain in the same position, which is less affected by the ship's roll. The arc-shaped cross-section can also reduce the impact of the lateral movement of the water flow, further reducing the impact of the ship's shaking on the gravity separation efficiency.

[0017] The gravity separation chamber wraps the demulsification chamber. When the temperature in the demulsification chamber rises to break the emulsion, the temperature of the sewage in the gravity separation chamber can also be increased, so that the oil-water separation always occurs at a more appropriate temperature, further ensuring the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a left side view of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 It is a front view of the present invention; Figure 4 It is a right side view of the present invention; Figure 5 It is a schematic diagram of the gear ring, separation tube and swing motor in the present invention.

[0019] In the figure: 1. Shell; 11. Ultrafiltration chamber; 12. Filter chamber; 13. Waste oil chamber; 14. Discharge chamber; 15. Support surface; 16. Drain head; 17. Oil discharge head; 2. Separation tube; 21. Dividing plate; 22. Demulsification chamber; 23. Gravity separation chamber; 24. Slag discharge port; 25. First interface sensor; 26. Second interface sensor; 27. First overflow pipe; 28. Water inlet; 29. ​​First overflow pipe; 210. First water supply pipe; 211. Second water supply pipe; 3. Buffer seat; 31. Base; 32. Spring; 33. Cylinder; 34. Connecting plate; 4. Assembly ring; 5. Roller; 6. Gear ring; 7. Swing motor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] For example, see Figure 1-Figure 3 A ship oil-containing ballast water, tank washing water and waste residue separation equipment comprises a shell 1, a separation tube 2 is movably connected in the shell 1, the separation tube 2 can rotate around its own axis, the outer wall of the separation tube 2 is fixedly connected with an assembly ring 4, the assembly ring 4 is provided with a plurality of groups, each group of assembly rings 4 is provided with two groups of rollers 5, the inner wall of the shell 1 is provided with a support surface 15 coaxial with the separation tube 2, the roller 5 rolls on the support surface 15, the shell 1 supports the separation tube 2 through the support surface 15, and the separation tube 2 is rotated on the roller 5 The separator 2 is freely rotated on the support surface 15. An arc-shaped dividing plate 21 is arranged in the separator 2. The dividing plate 21 divides the inner cavity of the separator 2 into a demulsification cavity 22 and a gravity separation cavity 23. The line connecting the midpoints of the two groups of rollers 5 and the midpoints of the dividing plate 21 passes through the axis of the separator 2. When sewage is contained in the demulsification cavity 22 and the gravity separation cavity 23, the orientation of the separator 2 remains unchanged under the gravity of the sewage. Under normal sea conditions, for most ships, the rolling may be relatively more obvious. The separator 2 is arranged longitudinally. When the ship rolls, the direction of the separation tube 2 changes less under the gravity of the sewage, that is, the sewage in the separation tube 2 shakes less. Secondly, since the cross-sections of the demulsification chamber 22 and the gravity separation chamber 23 are arc-shaped, when the separation tube 2 shakes slightly, the sewage flows naturally without causing excessive impact, further reducing the impact of the shaking on the floating of oil droplets. A heating pipe is provided in the demulsification chamber 22, and the gravity separation chamber 23 is connected to the water inlet 28. The sewage first enters the gravity separation chamber 23, and the arc-shaped cross-section can heat the oil-water separation. After separation in the gravity separation chamber 23, the waste residue sinks to the bottom and the oil droplets float up. The oil and water in the middle are pumped into the demulsification chamber 22. At this time, the sewage contains emulsified oil. The heating pipe heats the sewage to about 60 degrees Celsius for demulsification. The demulsification chamber 22 may also be equipped with other devices for demulsification. The temperature in the demulsification chamber 22 can heat the sewage in the gravity separation chamber 23 to avoid the sewage temperature in the gravity separation chamber 23 being too low, thereby reducing the separation efficiency. The sewage treated in the demulsification chamber 22 is sent to the filter equipment for filtration.

[0022] A first overflow pipe 27 and a first water supply pipe 210 are provided in the gravity separation chamber 23. The first overflow pipe 27 corresponds to the position of the floating oil, and the first water supply pipe 210 corresponds to the position of the oil-water mixture. A first interface sensor 25 is also provided in the demulsification chamber 22. The first interface sensor 25 is used to monitor the lower interface height of the floating oil. The first interface sensor 25 can detect the floating oil interface by buoyancy. For example, a floating ball with a density less than the density of the oil-water mixture and greater than the density of the floating oil is used, and the floating ball will rise and fall with the rise and fall of the interface. In this embodiment, the first interface sensor 25 is not limited, and it is sufficient to monitor the lower interface of the floating oil. When the floating oil interface drops to the lower warning value, that is, the interface is about to be lower than the water intake point of the first water supply pipe 210, the drainage speed of the first water supply pipe 210 is reduced to make the interface rise. When the floating oil interface rises to the upper warning value, that is, the interface is about to be higher than the oil spill height of the first overflow pipe 27, the drainage speed of the first water supply pipe 210 is increased to make the interface drop.

[0023] A second interface sensor 26, a first overflow pipe 29 and a second water supply pipe 211 are provided in the demulsification chamber 22. The first overflow pipe 29 corresponds to the position of the floating oil, and the second water supply pipe 211 corresponds to the position of the oil-water mixture. The second interface sensor 26 is used to monitor the lower interface height of the floating oil. The control process of the second interface sensor 26 on the second water supply pipe 211 is the same as the control process of the first interface sensor 25 on the first water supply pipe 210, which will not be repeated.

[0024] The shell 1 is provided with an ultrafiltration chamber 11, a filter chamber 12, a waste oil chamber 13 and a discharge chamber 14. The shell 1 is square. The ultrafiltration chamber 11, the filter chamber 12, the waste oil chamber 13 and the discharge chamber 14 are arranged at the four corners of the shell 1. The demulsification chamber 22 and the gravity separation chamber 23 are both connected with the waste oil chamber 13. The oil droplets floating in the demulsification chamber 22 and the gravity separation chamber 23 overflow and flow into the waste oil chamber 13 for storage, that is, the first overflow pipe 27 and the first overflow pipe 29 are both connected with the waste oil chamber 13. The waste oil chamber 13 is connected with the oil discharge head 17. After the oil discharge head 17 is opened, the waste oil stored in the waste oil chamber 13 is discharged. The demulsification chamber 22 is connected with the waste oil chamber 13 through the first overflow pipe 29. The second water supply pipe 211 is connected to the filter chamber 12, and the wastewater after secondary sedimentation is pumped into the filter chamber 12 for preliminary filtration. The filter chamber 12 is connected to the ultrafiltration chamber 11, and the wastewater preliminarily filtered in the filter chamber 12 is pumped into the ultrafiltration chamber 11, and the ultrafiltration chamber 11 is further filtered. The ultrafiltration chamber 11 and the filter chamber 12 are both connected to the waste oil chamber 13, and the waste oil filtered out of the ultrafiltration chamber 11 and the filter chamber 12 enters the waste oil chamber 13 for storage. The ultrafiltration chamber 11 is connected to the discharge chamber 14, and the treated wastewater is sent to the discharge chamber 14 for temporary storage. The discharge chamber 14 is connected to the drainage head 16, and the wastewater is discharged from the drainage head 16 after passing the inspection.

[0025] See also Figure 4 and Figure 5A buffer seat 3 is provided at the bottom of the shell 1. The buffer seat 3 is provided with two groups, which support the shell 1 from both ends of the shell 1 respectively. The buffer seat 3 includes a base 31 and a connecting plate 34. The connecting plate 34 is connected to the shell 1. A spring 32 is provided between the base 31 and the connecting plate 34. The buffer seat 3 can play a buffering role. When the ship pitches, the buffering effect of the buffer seat 3 will reduce the impact of the roll.

[0026] A cylinder 33 is provided between the base 31 and the connecting plate 34. The cylinder 33 has a throttle valve and an inflation valve. When the throttle valve is opened, the throttle valve can play a throttling role, generate damping, and reduce the amplitude of longitudinal shaking. When the throttle valve is closed, the height of the connecting plate 34 can be adjusted by inflating the cylinder 33, thereby adjusting the height of the two ends of the shell 1.

[0027] A slag discharge port 24 is provided at one end of the separation tube 2, and the slag discharge port 24 passes through the shell 1. The slag discharge port 24 is communicated with the gravity separation chamber 23. A notch is provided at the corresponding position of the shell 1 for the slag discharge port 24 to swing. A gear ring 6 is provided on the outer wall of the separation tube 2, and a swing motor 7 is provided on the shell 1. The output shaft of the swing motor 7 is meshed with the gear ring 6 through a gear. The swing motor 7 drives the separation tube 2 to swing. When slag discharge is required, the sewage in the separation tube 2 is drained, and then the height of the two ends of the separation tube 2 is adjusted by the cylinder 33 so that the end where the swing motor 7 is located is lower, and then the swing motor 7 is started to swing the separation tube 2. When the separation tube 2 swings, the waste slag in the separation tube 2 will flow toward the swing motor 7 and be discharged by the swing motor 7.

[0028] Embodiment 2 A ship's oily ballast water and tank washing water waste residue separation process uses the above-mentioned ship's oily ballast water and tank washing water waste residue separation equipment to treat sewage.

[0029] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ship oil-containing ballast water and tank washing water waste residue separation device, comprising a housing (1), characterized in that: A separation tube (2) is movably connected to the shell (1). The separation tube (2) can rotate around its own axis. An arc-shaped dividing plate (21) is provided in the separation tube (2). The dividing plate (21) divides the inner cavity of the separation tube (2) into a demulsification cavity (22) and a gravity separation cavity (23). The demulsification cavity (22) is located above the gravity separation cavity (23). The separation tube (2) is placed along the longitudinal direction of the ship. Sewage first enters the gravity separation cavity (23) for treatment. The demulsification cavity (22) is connected to the gravity separation cavity (23). Sewage treated in the gravity separation cavity (23) is sent to the demulsification cavity (22) for treatment. The demulsification cavity (22) is connected to a filtering cavity. Sewage treated in the demulsification cavity (22) is sent to a filtering device for filtration.

2. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 1, characterized in that: An assembly ring (4) is fixedly connected to the outer wall of the separation tube (2), and the assembly ring (4) is provided in a plurality of groups, each group of the assembly ring (4) is provided with two groups of rollers (5), and the inner wall of the housing (1) is provided with a supporting surface (15) coaxial with the separation tube (2), and the rollers (5) roll on the supporting surface (15).

3. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 1, characterized in that: The gravity separation chamber (23) is provided with a first overflow pipe (27) and a first water supply pipe (210), the first overflow pipe (27) being located higher than the first water supply pipe (210), and the demulsification chamber (22) is further provided with a first interface sensor (25), the first interface sensor (25) being used to monitor the lower interface height of the floating oil, and when the first interface sensor (25) detects that the floating oil interface drops to a lower warning value H1, the drainage speed of the first water supply pipe (210) is reduced to cause the interface to rise, and when the floating oil interface rises to an upper warning value h1, the drainage speed of the first water supply pipe (210) is increased to cause the interface to drop.

4. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 3 is characterized in that: The demulsification chamber (22) is provided with a second interface sensor (26), a first overflow pipe (29) and a second water supply pipe (211). The first overflow pipe (29) is located higher than the second water supply pipe (211). The second interface sensor (26) is used to monitor the lower interface height of the floating oil. When the second interface sensor (26) detects that the floating oil interface drops to a lower warning value H2, the drainage speed of the second water supply pipe (211) is reduced to make the interface rise. When the floating oil interface rises to an upper warning value H2, the drainage speed of the first water supply pipe (210) is increased to make the interface drop.

5. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 1, characterized in that: The housing (1) further comprises an ultrafiltration chamber (11), a filter chamber (12) and a discharge chamber (14); the housing (1) is square; the ultrafiltration chamber (11), the filter chamber (12), the waste oil chamber (13) and the discharge chamber (14) are arranged at four corners of the housing (1); the demulsification chamber (22) and the gravity separation chamber (23) are both in communication with the waste oil chamber (13); the waste oil chamber (13) is in communication with an oil discharge head (17); the demulsification chamber (22) is in communication with the filter chamber (12) via a second water supply pipe (211); the filter chamber (12) is in communication with the ultrafiltration chamber (11); the ultrafiltration chamber (11) is in communication with the discharge chamber (14); and the discharge chamber (14) is in communication with a water discharge head (16).

6. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 1, characterized in that: A buffer seat (3) is provided at the bottom of the shell (1), and the buffer seat (3) is provided with two groups, which respectively support the shell (1) from both ends of the shell (1), and the buffer seat (3) comprises a base (31) and a connecting plate (34), the connecting plate (34) is connected to the shell (1), and a spring (32) is provided between the base (31) and the connecting plate (34).

7. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 6, characterized in that: A cylinder (33) is provided between the base (31) and the connecting plate (34), and the cylinder (33) has a throttle valve and an air charging valve. When the throttle valve is opened, the throttle valve can play a throttling role and generate damping. When the throttle valve is closed, the height of the connecting plate (34) can be adjusted by charging the cylinder (33).

8. The equipment for separating waste residue from oily ballast water and tank washing water of a ship according to claim 7, characterized in that: A slag discharge port (24) is provided at one end of the separation tube (2), the slag discharge port (24) passes through the shell (1), the slag discharge port (24) is communicated with the gravity separation chamber (23), a notch for swinging the slag discharge port (24) is provided at a corresponding position of the shell (1), a gear ring (6) is provided on the outer wall of the separation tube (2), a swing motor (7) is provided on the shell (1), and an output shaft of the swing motor (7) is meshed with the gear ring (6) via a gear.

9. A process for separating waste residue from oily ballast water and tank washing water of a ship, using the equipment for separating waste residue from oily ballast water and tank washing water of a ship as claimed in claim 8 to treat sewage.

10. A process for separating waste residue from oily ballast water and tank washing water of a ship according to claim 9, characterized in that: When it is necessary to discharge slag, the sewage in the separation pipe (2) is completely drained, the slag discharge port (24) is opened, and then the heights of the two ends of the separation pipe (2) are adjusted by the cylinder (33) so that the end where the swing motor (7) is located is lower, and then the swing motor (7) is started to swing the separation pipe (2).

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