A stirring mechanism for producing marine fuel oil by physical and chemical method of oil-containing pollution of a ship

Abstract

The utility model discloses a kind of stirring mechanism for producing marine fuel oil by ship oil pollution physical and chemical method, including the reaction kettle body and driving part being connected, stirring tank is provided in reaction kettle body, the output end of driving part is connected with transmission rod built-in in stirring tank, transmission rod includes two kinds of rotation direction and is set as variable speed rotation;The outer peripheral wall of transmission rod is spaced apart along its axial direction and is provided with multiple layers of paddle group, each layer of paddle group includes multiple paddles arranged in the periphery, paddle is set with inclination angle;The inner side wall of stirring tank is arranged with the same number of baffle as paddle along the periphery, baffle is set one-to-one with paddle, and baffle and the inner side wall of stirring tank have gap. The stirring mechanism of the utility model has the beneficial effects of effectively improving the overall stirring mixing uniformity of ship oil pollution and liquid medicament and preventing sedimentation.

Description

Technical Field

[0001] This utility model belongs to the field of fuel oil regeneration and processing technology, specifically relating to a stirring mechanism for producing marine fuel oil using a physical and chemical method for oil-contaminated ship fuel. Background Technology

[0002] In the treatment of oily pollutants from ships (such as bilge oily wastewater and sludge), chemical treatment is a key step in removing ash and impurities to achieve the resource utilization of the oil phase. This process usually requires the addition of specific chemical agents to the raw materials and the promotion of mixing and reaction through stirring, thereby creating favorable conditions for subsequent separation and purification.

[0003] However, existing mixing devices still have significant limitations in practical applications: on the one hand, due to the high viscosity, multiphase mixing, and solid-liquid coexistence characteristics of these pollutants, traditional mixing mechanisms struggle to achieve uniform mixing across the entire area, easily leading to dead zones or incomplete local reactions; on the other hand, the mass transfer efficiency between chemical agents and sludge is low, and conventional impeller structures cannot effectively break up emulsions or disperse solid aggregates, resulting in decreased ash removal rates, prolonged reaction times, and impacting the final quality and efficiency of fuel oil recovery. Therefore, there is an urgent need to develop a mixing device that can adapt to complex material characteristics and achieve efficient mixing and enhanced reaction to improve the overall process stability and resource utilization efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a stirring device that can achieve efficient mixing and enhanced reaction in the process of producing marine fuel oil using the physical and chemical method for oil-polluting marine vessels.

[0005] To address the aforementioned problems, this utility model provides a stirring mechanism for producing marine fuel oil using a physical-chemical method for treating oil pollution in ships. The mechanism includes a connected reactor body and a drive component. A stirring tank is installed inside the reactor body. The output end of the drive component is connected to a transmission rod built into the stirring tank. The transmission rod has two rotational directions (forward and reverse) and is configured for variable-speed rotation. Multiple layers of blades are spaced along the axial direction on the outer peripheral wall of the transmission rod. Each blade group includes multiple blades arranged circumferentially, with the blades set at an angle. The inner wall of the stirring tank has baffles arranged circumferentially in the same number as the blades. The baffles correspond one-to-one with the blades, and a gap is left between the baffles and the inner wall of the stirring tank.

[0006] This invention relates to a mixing mechanism for producing marine fuel oil using a physical-chemical method for treating oil pollution in ships. By arranging multiple layers of blades at intervals on the transmission rod, each layer comprising multiple blades with angled inclinations, the mixing space is expanded, improving mixing uniformity and shortening the mixing reaction time. Simultaneously, baffles corresponding to the blades are arranged circumferentially on the inner wall of the mixing tank, with gaps maintained between the baffles and the inner wall. Through the interaction of the multiple layers of blades and baffles, when the transmission rod drives the blades to rotate at high speed, the cylindrical liquid vortex zone (mixing dead zone) rotating with the blades is disrupted, and the dispersed liquid... Turbulent flow emerges from the gap between the baffle and the mixing tank, increasing the shear force on the liquid and accelerating emulsification and demulsification reactions. When the drive rod rotates forward, fluid is drawn in from above the impeller and discharged in a spiral shape below, then rises along the inner wall of the mixing tank, forming an axial circulation flow with a large circulation volume. This effectively improves the overall uniformity of mixing oily pollutants and liquid agents on the ship. At the same time, the reverse rotation of the drive rod causes the mixed liquid to flow in the opposite direction, exerting a reverse lifting force on the sediment, which can disrupt the sediment deposition trend and facilitate the subsequent homogeneous mixed liquid entering the separation mechanism for ash and wastewater separation.

[0007] In some embodiments, the impeller blades are right-handed, with the blade angle ranging from 43° to 47°. This results in flatter blades within this angle range, closer to a plane perpendicular to the axis. This generates radial flow into the fluid, throwing it against the tank wall, creating strong shearing action and improving mixing efficiency.

[0008] In some embodiments, the ratio of the inscribed circle diameter of the outer edge of the blade assembly to the diameter of the mixing tank is 0.37 to 0.38. Thus, by using multi-layered propulsion blades with a smaller diameter and higher axial density, combined with the action of baffles, the uniformity of mixing oily pollutants and liquid agents on the ship is improved.

[0009] In some embodiments, the baffle is a cuboid, with its length aligned with the axial direction of the drive rod. This elongated baffle, positioned opposite to the multi-layered blade assembly, ensures a seamless fit between the baffle and the blades.

[0010] In some implementations, the speed range of the drive rod is 250~550 rpm. Therefore, by controlling the rotation speed of the drive rod between the processes of start-up, feeding, dosing, emulsification, demulsification, reaction, discharge centrifugation, and shutdown, the stirring speed can be changed, improving the efficiency of each stage.

[0011] In some embodiments, the outer peripheral wall of the transmission rod is provided with three layers of blades along its axial direction, with equal spacing between each layer; each blade assembly includes three blades, and three baffles are arranged on the inner side wall of the mixing tank. Thus, the high-density three-layer blade assembly arranged axially improves the mixing effect and prevents dead zones in the mixing process.

[0012] In some embodiments, the baffle is bolted to the inner wall of the mixing tank, and the impeller is connected to the drive rod by screws and keys. This facilitates the disassembly and replacement of the baffle and impeller.

[0013] In some embodiments, the gap between the baffle and the inner wall of the mixing tank is 8-12 mm. This allows some of the dispersed turbulent flow to escape from the gap between the baffle and the mixing tank, providing an upward channel for the fluid and simultaneously increasing the shear force on the liquid, thus improving the mixing effect.

[0014] In some embodiments, the driving component is a motor, and a condenser is installed on one side of the motor above the reactor body. The motor and the transmission rod are connected by a reducer and a coupling. Thus, the power connection between the motor output shaft and the transmission rod is achieved through the reducer and coupling.

[0015] In some embodiments, the stirring mechanism further includes a control device, with a frequency converter connected to the motor. The control device is electrically connected to the frequency converter, the motor, and the reducer. Thus, the frequency converter adjusts the frequency and voltage of the output power supply according to the control signal issued by the control device, thereby precisely controlling the motor speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a stirring mechanism for producing marine fuel oil using a physical-chemical method according to one embodiment of the present invention. Figure 2 for Figure 1 A cross-sectional view of some components; Figure 3 for Figure 2 A schematic diagram of the blade assembly shown; Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0017] In the picture: 1. Reactor body; 2. Stirring tank; 3. Drive rod; 4. Paddle; 5. Baffle; 6. Motor; 7. Condenser; 8. Reducer; 9. Coupling; 10. Key. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. The terms "comprising," "including," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0020] Figure 1 The diagram schematically illustrates a stirring mechanism for producing marine fuel oil using a physicochemical method according to one embodiment of the present invention. For example... Figure 1 and Figure 2 As shown, the device includes a reactor body 1 and a drive component connected to each other. A stirring tank 2 is installed inside the reactor body 1. The output end of the drive component is connected to a transmission rod 3 built into the stirring tank 2. The transmission rod 3 has two rotation directions, forward and reverse, and is configured to rotate at variable speed. Multiple sets of blades 4 are arranged at intervals along the axial direction on the outer peripheral wall of the transmission rod 3. Each set of blades 4 includes multiple blades 4 arranged circumferentially. The blades 4 are set at an inclination angle. The inner side wall of the stirring tank 2 has baffles 5 arranged circumferentially in the same number as the blades 4. The baffles 5 are arranged one-to-one with the blades 4, and there is a gap between the baffles 5 and the inner side wall of the stirring tank 2.

[0021] The working process of the stirring mechanism is: start-up - feeding - adding medicine into the stirring tank 2 - emulsification - demulsification - reaction - discharge centrifugation - shutdown. In this embodiment, the outer peripheral wall of the transmission rod 3 is provided with three layers of blades 4 along its axial direction, with equal spacing between each layer. In this example, the spacing between each layer of blades 4 is 480mm. Each layer of blades 4 includes three blades 4. Three baffles 5 are arranged on the inner side wall of the stirring tank 2. By arranging three layers of blades 4 at intervals on the transmission rod 3, each layer of blades 4 includes three blades 4 with an inclination angle (e.g., ...). Figure 3 and Figure 4As shown, the three blades 4 are evenly arranged circumferentially, which expands the mixing space and improves the uniformity of mixing oily pollutants and agents in the ship. Compared with a single-layer mixing blade 4, it can improve the uniformity by 5-10%, thereby shortening the mixing reaction time. At the same time, baffles 5 are arranged circumferentially on the inner wall of the mixing tank 2, corresponding one-to-one with the blades 4, and gaps are maintained between the baffles 5 and the inner wall of the mixing tank 2. Through the cooperation of multiple blades 4 and baffles 5, when the transmission rod 3 drives the blades 4 to rotate at high speed, it can break the cylindrical liquid vortex zone that rotates with the blades 4, prevent the mixing dead zone, and the dispersed turbulent flow flows out from the gap between the baffles 5 and the mixing tank 2, increasing the shear force on the liquid. Rapid emulsification and demulsification reactions; when the drive rod 3 rotates forward, fluid is drawn in from above the blade 4, and the fluid is discharged in a spiral shape below, then rises along the inner wall of the mixing tank 2, forming an axial circulation flow with a large circulation volume, which has the beneficial effect of effectively improving the overall mixing uniformity of oily pollutants and liquid agents on ships; at the same time, after the reaction between oily pollutants and agents on ships is completed, flocculation and sedimentation of non-ideal components will occur, which is not conducive to the homogenization of the liquid entering the subsequent centrifugation process. By reversing the drive rod 3, the mixed liquid flows in the opposite direction, which has a reverse lifting force on the sediment, which can disrupt the sedimentation trend, thereby facilitating the subsequent homogenized mixed liquid to enter the separation mechanism for ash and wastewater separation.

[0022] In another embodiment, the blade 4 has a right-handed tilt angle, ranging from 43° to 47°, with a preferred tilt angle of 45°. Thus, the blade 4 within this tilt angle range is flatter and closer to a plane perpendicular to the axis. This generates radial flow in the fluid, throwing it against the wall of the mixing tank 2, resulting in strong shearing and high turbulence. This leads to more complete local mixing and dispersion of the liquid, thus improving the mixing effect.

[0023] As a preferred embodiment, see Figure 2 As shown, the ratio of the inscribed circle diameter d of the outer edge of the blade group 4 to the diameter D of the mixing tank 2 is 0.37~0.38, and the d / D ratio is preferably 0.375. In this example, the inscribed circle diameter d of the outer edge of the blade group 4 is φ300mm, and the diameter D of the mixing tank 2 is φ800mm. Thus, by setting a multi-layer propulsion blade 4 with a smaller diameter and a higher axial arrangement density, and in conjunction with the baffle 5, the uniformity of mixing of oily pollutants and liquid agents on the ship is improved.

[0024] As a preferred embodiment, see Figure 2 As shown, the gap W between the baffle 5 and the inner wall of the mixing tank 2 is 8~12mm, and in this example, the gap W is preferably 10mm. Therefore, the dispersed turbulent flow exits from the gap between the baffle 5 and the mixing tank 2, providing an upward channel for the fluid, while simultaneously increasing the shear force on the liquid and improving the mixing effect. As a preferred embodiment, see Figure 2 As shown, the baffle 5 is a cuboid, and its length direction is aligned with the axial direction of the transmission rod 3. Thus, by having the elongated baffle 5 positioned opposite to the three-layer blade group 4 with blades 4 in the same direction (one baffle 5 mates with three blades 4 on the same side), the overall fit between the baffle 5 and the blades 4 on the same side is ensured.

[0025] In this embodiment, the speed range of the transmission rod 3 is set to 250~550 rpm, that is, the speed range of the impeller 4 is 250~550 rpm. Therefore, by controlling the rotation speed of the transmission rod 3 between the processes of start-up, feeding, chemical addition, emulsification, demulsification, reaction, discharge centrifugation, and shutdown, the stirring speed is changed, improving the effect of each stage. In the start-up-feeding stage, the impeller 4 speed is adjusted to 100 rpm for low-speed stirring, mainly for heat exchange and temperature increase within the reactor body 1; in the chemical addition-emulsification stage, the impeller 4 speed is adjusted to 550 rpm for high-speed stirring, mainly for accelerating the emulsification of oily pollutants from the ship; in the demulsification-chemical reaction stage, the impeller 4 speed is reduced to 400 rpm for relatively high-speed stirring, mainly for uniform mixing of the mixture; in the discharge centrifugation-shutdown stage, the impeller 4 speed is further reduced to 250 rpm for relatively low-speed stirring, which helps to overcome the sedimentation and precipitation of denser flocs, providing homogeneous raw materials for the next centrifugation process.

[0026] In one specific embodiment, see as shown in Figure 3 and... Figure 5 As shown, the baffle 5 is bolted to the inner wall of the mixing tank 2, and the blade 4 is connected to the transmission rod 3 by screws and key 10. In this way, the key connection prevents relative rotation between the blade 4 and the transmission rod 3, bears shear force and transmits the main torque, and the tightening of the screws generates clamping force to press the blade 4 onto the shaft, which also facilitates the disassembly and replacement of the baffle 5 and the blade 4.

[0027] Furthermore, in a specific embodiment, the driving component is a motor 6. A tubular condenser 7 is installed above the reactor body 1 on one side of the motor 6. The motor 6 and the transmission rod 3 are connected via a reducer and a coupling. Thus, the power connection between the output shaft of the motor 6 and the transmission rod 3 is achieved through the reducer 8 and the coupling 9. The stirring mechanism also includes a control device. A frequency converter is connected to the motor 6, and the control device is electrically connected to the frequency converter, the motor 6, and the reducer 8. Thus, the frequency converter adjusts the frequency and voltage of the output power supply according to the control signal issued by the control device, thereby precisely controlling the speed of the motor 6.

[0028] This invention relates to a stirring mechanism for producing marine fuel oil from oil-containing contaminants using a physical-chemical method. Through the cooperation of four sets of multi-layered blades and five baffles, it prevents dead zones in the mixing process, increases the shear force on the liquid, and accelerates emulsification and demulsification reactions. Simultaneously, by adjusting the rotation direction and speed of the blades, it effectively improves the overall uniformity of mixing the oil-containing contaminants and liquid agents, and prevents sedimentation. This allows the invention to adapt to complex material characteristics and achieve highly efficient mixing and enhanced reaction, thereby improving the overall process stability and resource utilization efficiency.

[0029] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A stirring mechanism for producing marine fuel oil from oil-contaminated ships using a physical-chemical method, characterized in that, The device includes a reactor body and a drive unit connected to each other. A stirring tank is installed inside the reactor body. The output end of the drive unit is connected to a transmission rod built into the stirring tank. The transmission rod has two rotation directions, forward and reverse, and is configured to rotate at variable speed. The outer peripheral wall of the transmission rod is provided with multiple layers of blade groups at intervals along its axial direction. Each layer of blade group includes multiple blades arranged circumferentially, and the blades are set at an inclination angle. The inner wall of the mixing tank is provided with baffles of the same number as the blades of the first layer of blades arranged circumferentially. The baffles are arranged in a one-to-one correspondence with the blades, and a gap is left between the baffles and the inner wall of the mixing tank.

2. The stirring mechanism for producing marine fuel oil using the physical-chemical method for oil-contaminated marine vessels according to claim 1, characterized in that, The blade has a right-hand tilt angle, and the blade tilt angle ranges from 43° to 47°.

3. The stirring mechanism for producing marine fuel oil using the physical-chemical method for oil-contaminated marine vessels according to claim 1, characterized in that, The ratio of the diameter of the inscribed circle of the outer edge of the blade assembly to the diameter of the mixing tank is 0.37~0.

38.

4. The stirring mechanism for producing marine fuel oil using the physical-chemical method for oil-contaminated marine vessels according to claim 1, characterized in that, The baffle is a cuboid, and the length direction of the baffle is consistent with the axial direction of the transmission rod.

5. The stirring mechanism for producing marine fuel oil using the physical-chemical method for treating oil-contaminated marine structures according to any one of claims 1-4, characterized in that, The speed range of the transmission rod is 250~550 rpm.

6. The stirring mechanism for producing marine fuel oil from oil-contaminated ships using a physical-chemical method according to any one of claims 1-4, characterized in that, The outer peripheral wall of the transmission rod is provided with three layers of blades along its axial direction, with equal spacing between each layer; the blade group includes three blades, and three baffles are arranged on the inner side wall of the mixing tank.

7. The stirring mechanism for producing marine fuel oil from oil-contaminated ships using a physical-chemical method according to claim 6, characterized in that, The baffle is bolted to the inner wall of the mixing tank, and the blade is connected to the transmission rod by screws and keys.

8. The stirring mechanism for producing marine fuel oil using a physical-chemical method according to any one of claims 1-4, characterized in that, The gap between the baffle and the inner wall of the mixing tank is 8~12mm.

9. The stirring mechanism for producing marine fuel oil using the physical-chemical method for oil-contaminated marine vessels according to claim 1, characterized in that, The driving component is a motor, and a condenser is installed on one side of the motor above the reactor body. The motor and the transmission rod are connected by a reducer and a coupling.

10. The stirring mechanism for producing marine fuel oil from oil-contaminated ships using a physical-chemical method according to claim 9, characterized in that, The stirring mechanism also includes a control device, and a frequency converter is connected to the motor. The control device is electrically connected to the frequency converter, the motor, and the reducer.

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