Dehydration tank for ship oily sewage treatment

Abstract

The utility model relates to the technical field of dehydration tanks, and discloses a dehydration tank for ship oily sewage treatment, which comprises a tank body, one side of the tank body is connected with a sewage inlet pipe, the bottom of the tank body is connected with a liquid discharge pipe, one side of the tank body is provided with an oil storage tank, the upper part of the oil storage tank is provided with a water suction pump, and a floating plate is arranged in the tank body. A suction pipe is installed on the floating plate, a suction hole is formed in the lower side of the end, penetrating through the floating plate, of the suction pipe, the upper portion of the suction pipe is connected with a corrugated telescopic pipe, the floating plate communicates with a limiting pipe, and the peripheral side of the limiting pipe is sleeved with a spring. When the tank body is shaken by a ship, the floating plate can cover the liquid in the tank body under the action of the spring, so that the liquid is buffered by the floating plate to reduce fluid disorder caused by shaking.

Description

Technical Field

[0001] The utility model relates to the technical field of dewatering tanks, in particular to a dewatering tank for treating oily wastewater on ships. Background Art

[0002] The sewage generated by ships mainly includes two categories: domestic sewage and oily sewage. The direct discharge of wastewater has a great impact on environmental pollution, especially the special environmental impact of the hull and seawater environment. Oil substances float in the seawater, forming an oil film floating on the surface of the seawater, which is difficult to decompose and dissipate. Over time, it is easy to reduce the dissolved oxygen in the water and reduce the sunlight transmission rate, which directly affects the organisms and nutrients in the seawater. In serious cases, it will lead to an imbalance in the ecological balance of the seawater, damage water resources, and limit the survival of fish, shrimps, crabs and other marine food sources in the water, and enrich the oily sewage in their bodies, making them inedible.

[0003] A dehydration tank is a device used to remove moisture from objects. When oily wastewater enters the tank, the oil and water naturally separate due to their different densities. Specific process designs, such as using inclined plates, filters, or gravity settling, can accelerate the oil-water separation process. The separated oil layer is discharged through an outlet, while the water layer and impurities remain in the tank or are otherwise disposed of.

[0004] However, ships are prone to swaying due to the impact of waves when traveling on water. When the ship sways, the dewatering tank will also sway with the ship's swaying, causing the oily wastewater inside the dewatering tank to sway, changing the fluid distribution inside the dewatering tank, affecting the dewatering effect, resulting in reduced dewatering efficiency or substandard dewatering quality. Therefore, those skilled in the art have provided a dewatering tank for treating oily wastewater on ships to address the problems raised in the above background technology. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides a dehydration tank for treating oily wastewater on ships, so as to solve the problem that when the ship shakes, the dehydration tank will shake with the shaking of the ship, causing the oily wastewater inside the dehydration tank to shake, changing the fluid distribution inside the dehydration tank, affecting the dehydration effect, and resulting in reduced dehydration efficiency or substandard dehydration quality.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dewatering tank for treating oily wastewater on ships, comprising a tank body, a sewage inlet pipe connected to one side of the tank body, a liquid discharge pipe connected to the bottom of the tank body, an oil storage tank provided on one side of the tank body, a water pump installed on the upper part of the oil storage tank, a floating plate provided in the tank body, a suction pipe installed on the floating plate, the suction pipe passing through one end of the floating plate and having a suction hole provided on the lower side, a corrugated telescopic tube connected to the upper part of the suction pipe, a limiting tube connected to the floating plate, and a spring provided on the circumference of the limiting tube.

[0009] Preferably, the bottom end of the position-limiting tube is communicated with the floating plate, and the position-limiting tube slides through the top of the tank body. The position-limiting tube is provided to balance the air pressure of the tank body.

[0010] Preferably, one end of the spring presses against the float plate, and the other end of the spring presses against the bottom inner wall of the tank body, so that the float plate has a certain downward pressure when floating on the liquid surface, so that the liquid can reduce the fluid chaos caused by shaking under the buffering of the float plate.

[0011] Preferably, the bottom side of the float is in contact with the liquid surface in the tank body, the suction hole is in the liquid surface in the tank body, the water pump is connected to a liquid suction pipe, the other end of the liquid suction pipe is connected to the corrugated expansion pipe, and the water pump is started to suck the oil on the upper layer of the liquid surface into the oil storage tank through the suction pipe toward the suction hole on the side of the liquid surface.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention provides a dewatering tank for treating oily wastewater on ships, which has the following beneficial effects:

[0014] Through design, when the tank body is shaken by the shaking of the ship, the float plate can cover the liquid in the tank body under the action of the spring, so that the liquid can reduce the fluid chaos caused by the shaking under the buffering of the float plate, and with the cooperation of the water pump, suction pipe and oil storage tank, the suction pump starts to suck the oil on the upper layer of the liquid surface into the oil storage tank through the suction hole on the side of the liquid surface of the suction pipe. The setting of the float plate avoids the shaking of the oily wastewater inside the dehydration tank when the ship shakes, which changes the fluid distribution inside the dehydration tank, affects the dehydration effect, and leads to reduced dehydration efficiency or substandard dehydration quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a dewatering tank for treating oily wastewater on ships provided in an embodiment of the present application.

[0016] Figure 2 This is a structural cross-sectional view of a tank body in a dehydration tank for treating oily wastewater on ships provided in an embodiment of the present application.

[0017] Figure 3This is a structural cross-sectional view of a floating plate in a dewatering tank for treating oily wastewater on ships provided in an embodiment of the present application.

[0018] In the figure: 1. Tank body; 2. Sewage inlet pipe; 3. Liquid discharge pipe; 4. Liquid extraction pipe; 5. Bellows expansion pipe; 6. Suction pipe; 7. Suction hole; 8. Float plate; 9. Limiting pipe; 10. Spring; 11. Water pump; 12. Oil storage tank. DETAILED DESCRIPTION

[0019] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0020] The utility model provides a technical solution, a dewatering tank for treating oily wastewater on ships, please refer to Figure 1 、 Figure 2 , including a tank body 1, one side of the tank body 1 is connected to a sewage inlet pipe 2, the bottom of the tank body 1 is connected to a liquid discharge pipe 3, one side of the tank body 1 is provided with an oil storage tank 12, the upper part of the oil storage tank 12 is installed with a water pump 11, a floating plate 8 is provided in the tank body 1, a suction pipe 6 is installed on the floating plate 8, the suction pipe 6 passes through one end of the floating plate 8 and has a suction hole 7 on the lower side, please refer to Figure 2 、 Figure 3 The upper part of the suction pipe 6 is connected to a bellows telescopic pipe 5 , and the floating plate 8 is connected to a limit pipe 9 , and a spring 10 is sleeved around the circumference of the limit pipe 9 .

[0021] See also Figure 1 、 Figure 3 The bottom end of the limiting tube 9 is connected to the floating plate 8, and the limiting tube 9 slides through the top of the tank body 1. The limiting tube 9 is set to balance the air pressure of the tank body 1. One end of the spring 10 is pressed against the floating plate 8, and the other end of the spring 10 is pressed against the inner wall of the bottom side of the tank body 1. The floating plate 8 has a certain downward pressure when floating on the liquid surface, so that the liquid reduces the fluid chaos caused by shaking under the buffering of the floating plate 8. The bottom side of the floating plate 8 is in contact with the liquid surface in the tank body 1, and the suction hole 7 is in the liquid surface in the tank body 1. The water pump 11 is connected to the liquid suction pipe 4, and the other end of the liquid suction pipe 4 is connected to the corrugated telescopic tube 5. When the water pump 11 is started, the oil on the upper layer of the liquid surface is sucked into the oil storage tank 12 through the suction pipe 6 toward the suction hole 7 on the side of the liquid surface.

[0022] The dewatering tank for treating oily wastewater on ships in the present invention includes a tank body 1, a sewage inlet pipe 2 is installed on one side of the tank body 1 for inputting oily wastewater, a drain pipe 3 with a solenoid valve is connected to the bottom side of the tank body 1, and the water at the bottom can be drained after the oily wastewater is allowed to stand and stratify. A floating plate 8 is provided in the tank body 1, the circumference of the floating plate 8 is in contact with the inner wall of the tank body 1, and the floating plate 8 is hollow. The material is light and can float on the surface of the solution. A suction pipe 6 is installed in the floating plate 8, and a suction hole 7 is opened on the side of the suction pipe 6 facing the water surface;

[0023] A liquid extraction pipe 4 is connected to the upper side of the suction pipe 6 through a bellows expansion pipe 5. The liquid extraction pipe 4 extends from the top of the tank body 1. A water pump 11 and an oil storage tank 12 are installed at the other end of the liquid extraction pipe 4. A limit pipe 9 is vertically connected to the floating plate 8. The limit pipe 9 slides through the top of the tank body 1. The limit pipe 9 is tubular and the bottom opening is in contact with the liquid surface in the tank body 1. A spring 10 is sleeved around the limit pipe 9. One end of the spring 10 is in pressure contact with the inner wall of the top side of the tank body 1, and the bottom end of the spring 10 is in pressure contact with the floating plate 8.

[0024] When the tank body 1 is shaken by the rocking of the ship, the float 8 can cover the liquid in the tank body 1 under the action of the spring 10, so that the liquid can reduce the fluid chaos caused by the rocking under the buffering of the float 8, and with the cooperation of the water pump 11, the suction pipe 6 and the oil storage tank 12, the water pump 11 is started to suck the oil on the upper layer of the liquid surface into the oil storage tank 12 through the suction hole 7 on the side of the liquid surface of the suction pipe 6, and the sewage after the oil and water are separated can be transported to the filter unit through the drain pipe 3 (the filter unit is an existing equipment and is not shown in the figure), and the oil collected in the oil storage tank 12 can be processed at the next level.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] In this document, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly specified, ordinary technicians in this field can understand the specific meanings of the above terms in this utility model according to specific circumstances.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dewatering tank for treating oily wastewater on a ship, comprising a tank body (1), characterized in that: One side of the tank body (1) is connected to a sewage inlet pipe (2), and the bottom of the tank body (1) is connected to a liquid discharge pipe (3). An oil storage tank (12) is provided on one side of the tank body (1), and a water pump (11) is installed on the upper part of the oil storage tank (12). A floating plate (8) is provided in the tank body (1), and a suction pipe (6) is installed on the floating plate (8). The suction pipe (6) passes through the lower side of one end of the floating plate (8) and is provided with a suction hole (7). The upper part of the suction pipe (6) is connected to a corrugated telescopic pipe (5), and the floating plate (8) is connected to a limit pipe (9), and a spring (10) is sleeved on the circumference of the limit pipe (9).

2. A dewatering tank for treating oily wastewater from ships according to claim 1, characterized in that: The bottom end of the position-limiting tube (9) is in communication with the floating plate (8), and the position-limiting tube (9) slides through the top of the tank body (1).

3. The dewatering tank for treating oily wastewater from ships according to claim 1, characterized in that: One end of the spring (10) is pressed against the floating plate (8), and the other end of the spring (10) is pressed against the bottom inner wall of the tank body (1).

4. The dewatering tank for treating oily wastewater from ships according to claim 1, characterized in that: The water pump (11) is connected to a liquid extraction pipe (4), and the other end of the liquid extraction pipe (4) is connected to a bellows expansion pipe (5).

5. The dewatering tank for treating oily wastewater from ships according to claim 1, characterized in that: The bottom side of the floating plate (8) contacts the liquid surface in the tank body (1), and the suction hole (7) is located in the liquid surface in the tank body (1).

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