Oil tanker tank washing oily water storage device

Abstract

The utility model provides an oil tanker tank washing oily water storage device which is applied to the field of oil tanker tank washing oily water storage and comprises a base, a tank body is fixedly arranged in a groove in the top of the base and divided into an upper layer and a lower layer, two stirring shafts are fixedly connected to the inner side of the upper layer of the tank body, and the outer ends of the stirring shafts are fixedly connected with a first paddle and a second paddle respectively. A water spraying pipe is fixedly connected to the lower end of the tank body; a water inlet is fixedly connected to the upper end of the tank body; a water outlet is fixedly connected to the right side of the tank body; a distribution plate is fixedly connected to the tank body; the stirring device and the filtering device are combined, so that synergistic interaction can be achieved, the treatment process is optimized, the resource utilization rate is increased, and the problems that a storage device cannot achieve integration of the stirring device and the filtering device, the treatment efficiency is low and energy consumption is difficult to reduce are solved.

Description

Technical Field

[0001] This application relates to the field of oily wastewater storage during tank cleaning of oil tankers, and particularly to an oily wastewater storage device for tank cleaning of oil tankers. Background Technology

[0002] During the transportation of crude oil on tankers, complex sediment layers gradually form in the cargo oil tanks. These sediments are mainly composed of high-molecular-weight organic matter such as hydrogen sulfide and paraffin from the crude oil, mixed with solid impurities such as silt and metal shavings. When the type of oil loaded on a ship is changed from low-quality oil to high-quality oil, washing the tanks with crude oil alone is insufficient to meet the requirements for loading the new oil, and secondary washing with water is necessary. If this secondary washing water is leaked into the sea, it will seriously pollute the marine environment. Oil tanker wastewater storage devices serve to collect wastewater centrally, preventing direct discharge into the ocean and causing pollution, supporting oil-water separation treatment, and ensuring ship safety.

[0003] For example, the specification of Chinese patent CN214060170U discloses a wastewater treatment device for tank washing of oil tankers, including a device body, an outlet fixedly connected to one side of the device body, a first motor fixedly connected to the bottom of one side of the device body, a protective sleeve provided on the top of the first motor, a filter screen fixedly connected to one end of the outlet, and a sealed base movably connected to one side of the inside of the device body.

[0004] The above design solves the problem of sewage clogging the filter screen and affecting the filtration efficiency when the existing device is used, but it still has certain limitations. The device cannot integrate the stirring device and the filtration device, has low pretreatment efficiency, is difficult to reduce energy consumption, and has a relatively simple function. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this application is to solve the problems that the device cannot integrate the stirring device and the filtering device, the pretreatment efficiency is low, the energy consumption is difficult to reduce, and the function is relatively simple.

[0006] To address the aforementioned issues, this application provides a storage device for oily wastewater from tank cleaning on an oil tanker, comprising a base, a tank body fixedly mounted in a groove on the top of the base, the tank body being divided into upper and lower layers, two stirring shafts fixedly connected to the inner side of the upper layer of the tank body, a first impeller and a second impeller fixedly connected to the outer ends of the stirring shafts respectively, a rotating filter element fixedly connected to the inner side of the lower layer of the tank body, a second motor fixedly connected to the right side of the rotating filter element, and a water spray pipe fixedly connected to the lower end of the tank body.

[0007] This application utilizes an agitator shaft and its matching first and second blades to agitate oily wastewater from tanker cleaning. Oily wastewater typically contains a mixture of oil and water with different densities. Agitation prevents natural stratification, ensures uniform component distribution, facilitates stable operation of subsequent treatment equipment, and reduces the impact of stratification on agitation efficiency. When demulsifiers, flocculants, or other chemical agents need to be added, agitation accelerates the diffusion of these agents, ensuring they fully contact the wastewater. Both the first and second blades are wide blades, which optimize energy transfer efficiency and reduce the risk of entanglement or blockage. When the oily wastewater is discharged from the tank, the water spray pipe is activated to flush the filter device, removing oil and other impurities adhering to the tank surface, restoring filtration efficiency, and reducing the frequency of manual cleaning.

[0008] The upper stirring shaft drives the first and second impellers to rotate, which can uniformly mix oil, water, and solid particles in the oily wastewater. The lower rotating filter element generates centrifugal force when rotating at high speed, causing solid particles and high-density pollutants in the oily wastewater to be thrown against the outer wall of the filter element. The rotating filter element can also reduce the dependence on pre-sedimentation or centrifugation equipment, thus enabling the oily wastewater to meet the emission standards of the International Maritime Organization. The combination of the stirring device and the filtration device can synergistically enhance the efficiency, optimize the treatment process, achieve graded treatment, improve resource utilization, reduce the load on the filtration device, and extend the life of the filter media. Thorough mixing before filtration can prevent untreated oil from directly entering the filtration device, and can also save energy and reduce costs.

[0009] As a further improvement of this application, an inlet is fixedly connected to the upper end of the tank body. The inlet is responsible for introducing the oily wastewater to be treated into the device from the outside. A drain outlet is fixedly connected to the right side of the tank body. The inlet can smooth out flow fluctuations and reduce the impact load on the treatment device. The outlet is responsible for guiding the treated product to the next stage to ensure system safety.

[0010] As a further improvement of this application, a first gear and a second gear are fixedly connected to the right side of the tank. A first motor is driven to the upper end of the first gear, and a stirring shaft is fixedly connected to both the first gear and the second gear. The first motor serves as the power source for the first gear and can transmit power to the second gear through meshing. Thus, while the stirring shaft connected to the first gear rotates, the stirring shaft connected to the second gear rotates in the opposite direction, achieving bidirectional stirring and enhancing the mixing effect. The rigid meshing of the gear transmission makes it less prone to slippage, ensuring a constant stirring shaft speed and avoiding uneven mixing due to load fluctuations. This allows even the liquid in the dead corners of the tank to be fully stirred. Both the first gear and the second gear are detachable modules, eliminating the need to disassemble the entire equipment after wear, thus reducing maintenance costs.

[0011] The stirring shaft driven by the first and second gears can adjust its speed in real time to match the cleaning cycle of the rotating filter element. Low-speed stirring can reduce the load on the filter element, while high-speed stirring can enhance pretreatment.

[0012] As a further improvement of this application, a distribution plate is fixedly connected to the tank body. As a transition structure, the distribution plate can disperse the oily wastewater flowing in from the upper layer to the lower layer through uniformly distributed pores or guiding channels, avoiding the oily wastewater from flowing directly to a certain area due to gravity. This ensures that the oily wastewater is evenly distributed across the cross-section of the device and prevents the lower rotating filter element from being displaced or damaged by the impact of the oily wastewater. The opening ratio and pore size of the distribution plate can be adjusted according to different treatment requirements. This can guide light oil droplets to float to the upper layer, while the intermediate aqueous phase enters the lower layer for deep treatment, thereby improving the separation efficiency.

[0013] As a further improvement of this application, a slide rail is fixedly connected to the inner end of the base, and a counterweight is fixedly connected to the upper end of the slide rail. The two work together to achieve the stability, dynamic balance and operational safety of the device. The slide rail plays a role in linear motion control, providing a precise linear motion trajectory to ensure that it slides within a specific path, avoiding deviation or jamming, preventing the moving parts from running beyond their range, and avoiding collisions or structural damage. The counterweight plays a role in dynamic balance adjustment, reducing the impact of ship swaying on stirring efficiency and centrifugation efficiency, and reducing the vibration amplitude of the overall device.

[0014] As a further improvement of this application, a turbidity meter, a control panel, and a flow meter are fixedly connected to the left side of the tank. The turbidity meter can monitor the water purification effect in real time, and the flow meter can accurately control the treatment load, optimize resource consumption, adjust the stirring power according to the flow rate, and reduce ineffective energy consumption. The control panel includes a stirring module, a filtration module, and a stabilization module. The stirring module controls the stirring shaft, the filtration module controls the rotating filter element, and the stabilization module controls the slide rail.

[0015] In summary, during use, this application utilizes a stirring shaft and its matching first and second blades to stir the oily wastewater from tanker washing. The distribution plate, as a transition structure, disperses the oily wastewater flowing in from the upper layer to the lower layer. When the rotating filter element in the lower rotating filter layer rotates at high speed, it generates centrifugal force, causing solid particles and high-density pollutants in the oily wastewater to be thrown towards the outer wall of the filter element. This solves the problems of the inability to integrate the stirring device and the filtration device, low treatment efficiency, and difficulty in reducing energy consumption. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of this application;

[0017] Figure 2 This is a schematic diagram of the overall structure of this application;

[0018] Figure 3 This is a right-side view of this application;

[0019] Figure 4 This is a left side view of this application;

[0020] Figure 5 This is a schematic diagram of the structure at the stirring shaft of this application;

[0021] Figure 6 This is a schematic diagram of the structure of the mating block in this application;

[0022] Figure 7 This is a schematic diagram of the structure of the mating block in this application;

[0023] Figure 8 This is a block diagram of the control system of this application.

[0024] Explanation of the labels in the diagram:

[0025] 1 Tank body, 2 Inlet, 3 Base, 4 Drain, 5 Rotary filter element, 501 Spray pipe, 6 Stirring shaft, 601 First impeller, 602 Second impeller, 7 Counterweight, 8 Slide rail, 9 First gear, 10 Second gear, 11 First motor, 12 Turbidity meter, 13 Control panel, 14 Flow meter, 15 Distribution plate, 16 Second motor. Detailed Implementation

[0026] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] Implementation method 1:

[0030] This utility model provides a storage device for oily wastewater from tank washing on oil tankers. Please refer to [link / reference]. Figure 1 The system includes a base 3, a tank 1 fixedly mounted in a groove on the top of the base 3, the tank 1 being divided into upper and lower layers, two stirring shafts 6 fixedly connected to the inner side of the upper layer of the tank 1, a first blade 601 and a second blade 602 fixedly connected to the outer ends of the stirring shafts 6 respectively, a rotating filter element 5 fixedly connected to the inner side of the lower layer of the tank 1, a second motor 16 fixedly connected to the right side of the rotating filter element 5, and a water spray pipe 501 fixedly connected to the lower end of the tank 1.

[0031] During use, oily wastewater flows into the upper tank 1 through the inlet 2. The stirring rod in the upper tank 1 stirs the wastewater, and the rotation speed of the stirring rod can be controlled by the control panel 13. After sufficient stirring, the wastewater enters the lower layer and is filtered by the rotating filter element 5. After the rotating filter element 5 has fully filtered the wastewater, the control panel 13 controls the stirring rod and the rotating filter element 5 to stop operating. When the oily wastewater is discharged into the tank 1, the water spray pipe 501 is activated to flush the filter device, remove oil stains and other impurities adhering to the surface of the tank 1, restore the filtration efficiency, and reduce the frequency of manual cleaning.

[0032] The stirring shaft 6 and its matching first and second blades are used to stir the oily wastewater from the tank washing of oil tankers. The oily wastewater usually contains a mixture of oil and water with different densities. Stirring can prevent it from naturally separating into layers, ensure uniform distribution of components, help the subsequent treatment equipment to operate stably, and reduce the impact of separation on stirring efficiency. When it is necessary to add demulsifiers, flocculants and other chemical agents, stirring can accelerate the diffusion of the agents and make them fully contact the wastewater. The first and second blades are both wide blades, which can optimize energy transfer efficiency and reduce the risk of entanglement or blockage.

[0033] Please see Figure 2-3 The upper end of the tank 1 is fixedly connected to the inlet 2, and the right side of the tank 1 is fixedly connected to the outlet 4. After the stirring and filtration steps are completed, if it is necessary to temporarily store the treated wastewater in the tank 1, the outlet can be closed first. When it is necessary to discharge the wastewater to the next device or discharge, the outlet can be opened for operation. The inlet 2 can smooth the flow fluctuation and reduce the impact load on the treatment device. The outlet is responsible for introducing the treated product to the next stage to ensure system safety.

[0034] Please see Figure 5 A first gear 9 and a second gear 10 are fixedly connected to the right side of the tank body 1. A first motor 11 is driven to the upper end of the first gear 9. The first gear 9 and the second gear 10 are both fixedly connected to the stirring shaft 6. When oily wastewater enters the upper layer of the tank body 1, the first motor 11 is started. The first motor 11 drives the first gear 9 to rotate. The first gear 9 meshes with the second gear 10. The rotation of the first gear 9 drives the second gear 10 to rotate. The two rotate in opposite directions, thereby improving the stirring efficiency and achieving bidirectional stirring to enhance the mixing effect. The rigid meshing of the gear transmission makes it less prone to slippage, ensuring that the speed of the stirring shaft 6 is constant and avoiding uneven mixing due to load fluctuations. This allows the liquid in the dead corners of the tank body 1 to be fully stirred. The first gear 9 and the second gear 10 are both detachable modules, so there is no need to disassemble the entire equipment after wear, reducing maintenance costs.

[0035] The second implementation method:

[0036] Please see Figure 1 and Figure 5The tank body 1 is fixedly connected to a distribution plate 15. When the oily wastewater is stirred in the upper layer, the distribution plate 15, as a transition structure, can disperse the oily wastewater flowing in from the upper layer to the lower layer through uniformly distributed pores or guiding channels. This prevents the oily wastewater from flowing directly to a certain area due to gravity, ensuring that it is evenly distributed on the cross-section of the device. It also prevents the lower rotating filter element 5 from being displaced or damaged by the impact of the oily wastewater. The opening rate and pore size of the distribution plate 15 can be adjusted according to different treatment requirements. This can guide light oil droplets to float to the upper layer, while the intermediate water phase enters the lower layer for deep treatment, accelerating the separation efficiency.

[0037] Please see Figure 6 A slide rail 8 is fixedly connected to the inner end of the base 3, and a counterweight 7 is fixedly connected to the upper end of the slide rail 8. The control panel 13 controls the movement of the slide rail 8. When the oil tanker sways during its journey, the counterweight 7 will move in the opposite direction to the swaying direction of the oil tanker to balance the tank 1. The two work together to achieve the stability, dynamic balance and operational safety of the device. The slide rail 8 plays a role in linear motion control, providing a precise straight-line motion trajectory to ensure that it slides within a specific path, avoiding deviation or jamming, preventing the moving parts from running beyond their range, and avoiding collisions or structural damage. The counterweight 7 plays a role in dynamic balance adjustment, reducing the impact of ship swaying on the stirring efficiency and centrifugal efficiency, and reducing the vibration amplitude of the overall device.

[0038] Please see Figure 4 A turbidity meter 12, a control panel 13, and a flow meter 14 are fixedly connected to the left side of the tank body 1. The turbidity meter can monitor the water purification effect in real time. The control panel 13 includes a stirring module, a filtration module, and a stabilization module. The flow meter 14 plays a role in accurately controlling the treatment load, optimizing resource consumption, adjusting the stirring power according to the flow rate, and reducing ineffective energy consumption.

[0039] The above are merely preferred embodiments of this utility model; however, the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the scope of protection of this utility model.

Claims

1. An oil tanker cleaning ballast water storage device comprising a base (3), characterised in that, The base (3) top groove fixedly provided with a tank (1), the tank (1) is divided into two layers, the upper layer of the tank (1) is fixedly connected with two stirring shafts (6) inside, the outer end of the stirring shaft (6) is fixedly connected with the first paddle (601) and the second paddle (602) respectively, the lower layer of the tank (1) is fixedly connected with a rotating filter core (5) inside, the rotating filter core (5) is fixedly connected with the second motor (16) on the right side, the tank (1) is fixedly connected with a water spray pipe (501) at the lower end.

2. A tanker washing ballast water storage apparatus according to claim 1, characterised in that, The upper end of the tank (1) is fixedly connected with a water inlet (2), the right side of the tank (1) is fixedly connected with a drain (4).

3. A tanker washing ballast water storage apparatus according to claim 1, wherein The right side of the tank (1) is fixedly connected with a first gear (9) and a second gear (10), the upper end of the first gear (9) is drivingly connected with a first motor (11), the first gear (9) is fixedly connected with a stirring shaft (6), the second gear (10) is fixedly connected with a stirring shaft (6).

4. A tanker washing water storage apparatus according to claim 1, wherein The tank (1) is fixedly connected with a distribution plate (15).

5. A tanker washing water storage apparatus according to claim 1, wherein The inner end of the base (3) is fixedly connected with a slide rail (8), the upper end of the slide rail (8) is fixedly connected with a counterweight (7).

6. A tanker washing water storage apparatus according to claim 1, wherein The left side of the tank (1) is fixedly connected with a turbidimeter (12), a control panel (13) and a flowmeter (14).

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