Ship desulfurization wastewater discharging and diffusing device

Abstract

The application discloses a ship desulfurization wastewater discharging and outboard diffusion device, which comprises a drain pipe, the drain pipe comprises a glass fiber reinforced plastic pipe arranged inside and a duplex stainless steel pipe sleeved outside, the drain pipe comprises a water inlet end and a water outlet end, the water outlet end is connected with a flow guide ring, a flow distribution column is arranged along an axial center line of the drain pipe, the flow distribution column is provided with a connecting rod for fixing the flow distribution column on a side close to the water inlet end, three flow guide plates are circumferentially arranged on an inner wall of the water outlet end of the drain pipe, inner ends of the flow guide plates are fixedly connected with an outer wall of the flow distribution column, outer ends of the flow guide plates are fixedly connected with an inner wall of the drain pipe, a telescopic pipe is inserted into the flow distribution column, an impeller is arranged on an end of the telescopic pipe close to the flow guide ring, a scraper is arranged on an outer end of the impeller, and the scraper is tightly attached to an inner wall of the flow guide ring. The application improves the corrosion resistance of the drain pipe, further strengthens the dispersion and flow guide effect of the wastewater, and guarantees the sufficient mixing of the wastewater and seawater.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship waste discharge technology, in particular to a ship desulfurization wastewater overboard diffusion device. BACKGROUND

[0002] In view of the problem of exhaust pollution of ship diesel engines, IMO has formulated relevant deoxidation emission control regulations to constrain atmospheric pollution emission of ships, and the sulfur content of any fuel used on the ship should not exceed the prescribed limit. At present, a desulfurization tower is used to discharge wastewater containing sulfur by fully contacting seawater with exhaust gas to make the sulfur in the exhaust gas carried out by seawater and finally discharged. Since the discharged wastewater is highly acidic, the PH value of the wastewater is about 2.5, so the corrosion resistance of the wastewater discharge pipe is required to be high, and at present the wastewater discharge pipe is mainly made of duplex stainless steel or super stainless steel material, or made of a common steel pipe with special coating inside. But after 3-5 years of delivery of the ship, the wastewater discharge pipes made of the above two schemes will produce different corrosion leaks, causing the risk of ship operation and different degrees of economic losses to the ship owner. At the same time, according to the emission requirements of IMO, when the ship is in a static state, the PH value of the wastewater discharged at a distance of 4m from the overboard discharge point should reach 6.5, so the wastewater needs to be fully mixed with seawater outside the ship during discharge to ensure that the PH value of the wastewater meets the emission requirements. However, the existing wastewater discharge diffusion device increases the flow distribution plate in the discharge pipe to form a plume of discharged wastewater to accelerate the diffusion of wastewater, but the diffusion effect is poor in the actual discharge process, and the mixing effect of wastewater and seawater outside the ship is not ideal, which cannot meet the requirement of PH value of 6.5.

[0003] Therefore, it is necessary to provide a ship desulfurization wastewater overboard diffusion device to solve the above technical problems. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, provide a ship desulfurization wastewater overboard diffusion device, which can ensure that the wastewater is fully mixed with seawater to make the PH value of the wastewater meet the emission requirements, and at the same time improve the corrosion resistance of the discharge pipe to avoid pipeline leakage and pollution of the environment.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is:

[0006] The application discloses a ship desulfurization wastewater discharging and outboard diffusion device, which comprises a drain pipe, wherein the drain pipe comprises a glass steel pipe arranged inside and a duplex stainless steel pipe sleeved outside; the drain pipe comprises a water inlet end and a water outlet end; a flow guide ring is connected to the water outlet end; the flow guide ring has an outer diameter larger than that of the drain pipe; a flow distribution column is arranged along an axial center line of the drain pipe; a connecting rod for fixing the flow distribution column is arranged on the side of the flow distribution column close to the water inlet end; three flow guide plates are arranged in a circumferential array on the inner wall of the water outlet end of the drain pipe; the inner end of the flow guide plate is fixed to the outer wall of the flow distribution column; the outer end is fixed to the inner wall of the drain pipe; a telescopic pipe is inserted into the flow distribution column; a convex pipe is arranged on the insertion end of the telescopic pipe and the flow distribution column; a connecting column is pivotally connected to the convex pipe; a bearing is arranged between the connecting column and the convex pipe; the connecting column and the flow distribution column are connected through a tension spring; a blade is arranged on the outer end of the impeller; and the blade is tightly attached to the inner wall of the flow guide ring.

[0007] Preferably, the cross section of the flow guide plate perpendicular to the length direction is in a triangular structure, and the base of the triangle is close to the side of the water outlet end of the drain pipe.

[0008] Preferably, the water inlet end of the drain pipe is provided with a connecting flange.

[0009] Preferably, the inner wall of the drain pipe and the flow guide ring is provided with a special coating, and the special coating material is glass flake paint.

[0010] Preferably, the outer wall of the drain pipe is uniformly provided with a plurality of support welding seats in the circumferential direction.

[0011] Preferably, the flow distribution column is provided with a limiting step for limiting the displacement of the telescopic pipe close to the water outlet end and away from the water outlet end.

[0012] Compared with the prior art, the application has the following advantages:

[0013] 1. The sleeve structure of different materials inside and outside and the special coating of the inner wall improve the corrosion resistance of the drain pipe, avoid the leakage of the wastewater pipe, and reduce the operation risk of the ship.

[0014] 2. The three-stage flow distribution further strengthens the effect of wastewater dispersion and flow guide, guarantees the full mixing of the wastewater and seawater, and makes the PH value of the wastewater discharged at the 4m discharging point meet the discharging requirements. DETAILED DESCRIPTION

[0015] Figure 1 is a structural schematic view when the impeller is retracted;

[0016] Figure 2 is a structural schematic view when the impeller is extended;

[0017] Figure 3 is an internal structural schematic view when the telescopic pipe and the flow distribution column are inserted.

[0018] Figure 4 is Figure 3 is an enlarged schematic view of A in FIG. 1;

[0019] Wherein, 1 - drain pipe, 101 - connecting flange, 102 - support welding seat, 2 - guide ring, 3 - shunt column, 4 - connecting rod, 5 - guide plate, 6 - telescopic pipe, 7 - impeller, 701 - scraper, 8 - tension spring, 9 - connecting column, 10 - bearing DETAILED DESCRIPTION

[0020] The present application will be further clarified by the following examples and figures, which should be considered as merely illustrative and not limiting the scope of the application. After reading the application, those skilled in the art will be able to affect various modifications to the application without departing from the scope of the application. Accordingly, the application is not limited to the examples described herein.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fastening" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate media; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning in the present application by those skilled in the art

[0022] In the present application, the terms such as "upper", "lower", "bottom", "top" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the purpose of describing the structural relationship of the components or elements of the present application, and cannot be understood as a limitation of the present application.

[0023] As Figures 1 to 4As shown, a ship desulfurization wastewater overboard diffusion device, including a drain pipe 1, the drain pipe is composed of glass steel pipe arranged inside and duplex stainless steel pipe sleeved outside the glass steel pipe, the drain pipe includes a water inlet end and a water outlet end, the water inlet end of the drain pipe is provided with a connecting flange 101, which facilitates the connection of the drain pipe and the pipeline system of the desulfurization tower, a plurality of support welding seats 102 are uniformly arranged on the outer wall of the drain pipe in the circumferential direction, which facilitates the welding and fixation of the drain pipe, the water outlet end is connected with a flow guide ring 2, the outer diameter of the flow guide ring is larger than the outer diameter of the drain pipe, the drain pipe and the inner wall of the flow guide ring are provided with a special coating, the special coating material is glass flake paint, a flow dividing column 3 is arranged along the axial center line of the drain pipe, a connecting rod 4 for fixing the flow dividing column is arranged on the side of the flow dividing column close to the water inlet end, three flow guide plates 5 are arranged in the circumferential array on the inner wall of the water outlet end of the drain pipe, the inner end of the flow guide plate is fixedly connected with the outer wall of the flow dividing column, and the outer end is fixedly connected with the inner wall of the drain pipe, the cross section of the flow guide plate perpendicular to the length direction is in triangular structure, the base of the triangle is close to the side of the water outlet end of the drain pipe, a telescopic pipe 6 is inserted into the flow dividing column, a convex pipe is arranged at the insertion end of the telescopic pipe and the flow dividing column, a connecting column 9 is pivoted in the convex pipe, a bearing 10 is arranged between the connecting column and the convex pipe, the connecting column and the flow dividing column are connected through a tension spring 8, the flow dividing column is provided with a limiting step for limiting the displacement of the telescopic pipe close to the water outlet end and away from the water outlet end, a impeller 7 is arranged on the end of the telescopic pipe close to the flow guide ring, a scraper 701 is arranged on the outer end of the impeller, and the scraper is tightly attached to the inner wall of the flow guide ring.

[0024] A method for using a ship desulfurization wastewater overboard diffusion device and its principle: the outer connecting flange of the drain pipe is connected with the pipeline of the desulfurization tower, and the support welding seat on the outer wall of the drain pipe is welded and fixed with the ship body, the wastewater in the desulfurization tower flows into the drain pipe from the water inlet end, is first divided by the flow dividing column and the connecting rod for fixing the flow dividing column, then the wastewater passes through the flow guide plate and is secondly divided by the edges and corners on the top of the flow guide plate, finally the wastewater drives the impeller to rotate, the impeller extends outward while rotating under the impact of the wastewater, and finally extends out of the flow guide ring, when the impeller rotates, the scraper on the outer end of the impeller rotates outward along the inner wall of the flow guide ring, cutting off the algae attached to the inner wall of the flow guide ring and the outlet of the flow guide ring, the impeller rotates in the seawater outside the ship, so that the wastewater is further mixed with seawater after being discharged outside the ship, ensuring that the PH value of the wastewater after being discharged into seawater meets the specified requirements, when the wastewater discharge is completed, the telescopic pipe retracts the impeller under the action of the tension spring, and the wastewater discharge and division operation is completed.

[0025] The foregoing description has shown and described preferred embodiments of the application, but it will be understood that the application is not limited to the particular embodiments shown and described, as such will have many modifications, permutations, additions and subtractions and changes as are obvious to one skilled in the art, and it is therefore intended to cover all such modifications and changes as fall within the scope of the application, including combinations of the various features described above. Changes and modifications can be made to the application in light of this teaching and it is therefore intended to cover in the appended claims all such changes and modifications that fall within the scope of the application.

Claims

1. A device for discharging ship desulfurization wastewater overboard, characterized in that: The system includes a drain pipe comprising an inner fiberglass pipe and an outer duplex stainless steel pipe. The drain pipe has an inlet and an outlet. The inlet is fitted with a connecting flange, and the outlet is connected to a guide ring. The outer diameter of the guide ring is larger than the outer diameter of the drain pipe. A special coating, made of glass flake paint, is applied to the inner wall of both the drain pipe and the guide ring. Several support welded seats are evenly distributed circumferentially on the outer wall of the drain pipe. A diversion column is positioned along the axial centerline of the drain pipe. A connecting rod for fixing the diversion column is located near the inlet. Three guide plates are arranged in a circular array on the inner wall of the outlet end of the drain pipe. The guide plate has a triangular cross-section perpendicular to its length, with the base of the triangle near the outlet end of the drain pipe. The inner end of the guide plate is fixed to the outer wall of the diversion column, and the outer end is fixed to the inner wall of the drain pipe. A telescopic tube is inserted inside the diversion column. Limiting steps are provided inside the diversion column near the outlet end and away from the outlet end to restrict the displacement of the telescopic tube. A protruding tube is provided at the insertion end of the telescopic tube and the diversion column. A connecting column is pivotally connected inside the protruding tube. A bearing is provided between the connecting column and the protruding tube. The connecting column and the diversion column are connected by a tension spring. An impeller is provided at the end of the telescopic tube near the guide ring. A scraper is provided at the outer end of the impeller. The scraper is tightly fitted to the inner wall of the guide ring.

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