A ship bilge water pre-treatment sediment tank and a bilge water pre-treatment method

Abstract

The application discloses a ship bilge water pretreatment sedimentation tank and a bilge water pretreatment method. The bilge water pretreatment sedimentation tank comprises a box type cabinet body, a first main partition plate and a second main partition plate which are vertically arranged in the box type cabinet body from right to left and are spaced apart, a first oil dirt separation chamber is formed between the first main partition plate and the right side wall of the box type cabinet body, a second oil dirt separation chamber is formed between the first main partition plate and the second main partition plate, and a third oil dirt separation chamber is formed between the second main partition plate and the left side wall of the box type cabinet body; a pair of partition plates are further vertically arranged upwards at the bottom middle position in the second oil dirt separation chamber, the pair of partition plates separate the second oil dirt separation chamber into a left separation cavity and a right separation cavity which are communicated at the upper portion; a funnel is arranged in each of the first oil dirt separation chamber, the second oil dirt separation chamber and the third oil dirt separation chamber, and an oil dirt leading-out pipe is connected to the lower end of the funnel. The application improves the effect of ship bilge water pretreatment.

Description

Technical Field

[0001] This invention relates to the field of ship bilge water pretreatment technology, specifically to a bilge water pretreatment sedimentation tank and a bilge water pretreatment method. Background Technology

[0002] The function of the bilge water pretreatment sedimentation tank is to pretreat the bilge water of the ship, and to directly discharge the pre-separated sludge and oil, thereby reducing the difficulty of bilge water treatment. Then, the pretreated bilge water is transported to the oil-water separator, which effectively reduces the load on the oil-water separator.

[0003] To reduce the load on the oil-water separator, our company has specially designed a new bilge water settling tank for a certain cargo ship. It adopts the following structure: the tank is equipped with two vertical partitions, dividing it into three chambers (e.g., ...). Figure 3 As shown, the right-side chamber and the middle chamber are connected at the bottom of the tank, and the middle chamber is connected to the left-side chamber at the top of the tank. Oil sludge discharge funnels are located near the partitions between the left-side and right-side chambers. Binder water naturally settles and stratifies in the settling tank, with sludge settling at the bottom of the right-side chamber; oil sludge floats on the surface, while cleaner water accumulates between the two partitions; the floating oil sludge is discharged into the sludge tank or sludge tank; the bilge water in the left-side chamber of the tank naturally stratifies again, and the settled bilge water is discharged into the bilge water storage tank via a manual valve; the sludge deposited in the right-side chamber is dredged through the manhole during regular ship maintenance.

[0004] The aforementioned bilge water settling tank also has the following shortcomings: as the ship operates for a long time, oil will accumulate in the last chamber (left side chamber) and gradually contaminate the entire chamber, resulting in a reduction in separation efficiency.

[0005] Therefore, it is necessary to further improve the structure of the aforementioned ship bilge water pretreatment sedimentation tank to enhance the bilge water pretreatment effect, thereby reducing the load on the oil-water separator and thus contributing to energy conservation and environmental protection. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a sedimentation tank and a bilge water pretreatment method for ships, aiming to improve the effectiveness of bilge water pretreatment. The specific technical solution is as follows:

[0007] A pretreatment sedimentation tank for ship bilge water includes a fully enclosed box-type cabinet, and a first main partition and a second main partition arranged vertically from right to left within the box-type cabinet at intervals. A first oil-water separation chamber is formed between the first main partition and the right side wall of the box-type cabinet; a second oil-water separation chamber is formed between the first main partition and the second main partition; and a third oil-water separation chamber is formed between the second main partition and the left side wall of the box-type cabinet. The first and second oil-water separation chambers are connected at the top and bottom of the first main partition, respectively, and the second and third oil-water separation chambers are also connected at the top and bottom of the second main partition, respectively. The bottom of the second oil-water separation chamber contains… A partition is also erected at the intermediate position, dividing the second oil-stain separation chamber into a left separation chamber and a right separation chamber that are connected at the top. A funnel is provided in each of the first, second, and third oil-stain separation chambers. The funnels include a first funnel located at the top of the first oil-stain separation chamber, a second funnel located at the top of the left separation chamber of the second oil-stain separation chamber, and a third funnel located at the top of the third oil-stain separation chamber. The second and third funnels are at the same height, and the height of the first funnel and the partition are both lower than the heights of the second and third funnels. Oil-stain discharge pipes are connected to the lower ends of the first, second, and third funnels.

[0008] Preferably, the height of the secondary partition is higher than the height of the first funnel.

[0009] In this invention, the first oil separation chamber is provided with a bilge water inlet pipe, and the outlet of the bilge water inlet pipe is located on the middle side wall of the first oil separation chamber; the third oil separation chamber is provided with a bilge water pretreatment outlet pipe.

[0010] In this invention, the bilge water pretreatment outlet pipe includes an upper bilge water pretreatment outlet pipe connected to the upper part of the third oil sludge separation chamber and a lower bilge water pretreatment outlet pipe connected to the lower part of the third oil sludge separation chamber. The ends of both the upper and lower bilge water pretreatment outlet pipes located within the third oil sludge separation chamber are situated at the bottom of the chamber. The upper bilge water pretreatment outlet pipe is equipped with a normally open valve, and the lower bilge water pretreatment outlet pipe is equipped with a normally closed valve.

[0011] Preferably, a curved guide channel is provided on the lower connecting port of the second main partition, the curved guide channel is located in the third oil-stain separation chamber, and the curved guide channel extends upward in the third oil-stain separation chamber.

[0012] As a further improvement, the pretreatment sedimentation tank for ship bilge water of the present invention is further provided with a funnel height position adjuster on the top of the box-type cabinet for dynamically adjusting the height positions of the first funnel, the second funnel, and the third funnel; the funnel height position adjuster includes a corrugated pipe connected between the lower end of the funnel and the oil sludge outlet pipe, and a servo electric push rod provided on the top of the box-type cabinet, the lower end telescopic rod of the servo electric push rod being connected to the funnel.

[0013] Preferably, a liquid level sensor for detecting the liquid level inside the cabinet is also provided on the top of the cabinet; the servo electric push rod and the liquid level sensor are respectively connected to the control system.

[0014] As a further improvement of the present invention, the funnel is further provided with a funnel adaptive follow-up tilter, the funnel adaptive follow-up tilter including a ball joint rotating pair connected between the front end of the telescopic rod of the servo electric push rod and the center part of the funnel, a number of horizontal extension arms arranged at intervals along the circumference of the funnel on the outer periphery of the funnel, a lifting rod movably disposed on the horizontal extension arms, a float ball disposed on the upper end of the lifting rod for floating on the liquid surface, a baffle disposed on the lower end of the lifting rod, and a spring sleeved on the lifting rod and located between the horizontal extension arms and the baffle.

[0015] A method for pre-treating bilge water in a sedimentation tank for ship bilge water pretreatment is as follows: Bilge water enters the first oil-sludge separation chamber of the tank through the bilge water inlet pipe. In the first oil-sludge separation chamber, the bilge water undergoes its first natural stratification. Sludge settles to the bottom of the tank, while oil floating on the surface is discharged into the sludge tank or sludge tank through the first funnel. After the first natural stratification, the bilge water enters the right separation chamber of the second oil-sludge separation chamber through the connecting port at the bottom of the first main partition for a second natural stratification. A small amount of sludge settles to the bottom of the tank, while oil floating on the surface is discharged through the left separation chamber of the second oil-sludge separation chamber. The second funnel at the top drains into the sludge tank or sludge tank; the bilge water after the second natural stratification treatment enters the third oil sludge separation chamber from the left separation chamber through the connecting port at the bottom of the second main bulkhead for the third natural stratification. A small amount of oil floating on the surface is drained into the sludge tank or sludge tank through the third funnel located at the top of the third oil sludge separation chamber; the bilge water after the third natural stratification treatment is discharged into the bilge water storage tank through the bilge water pretreatment outlet pipe and normally open valve; the sludge deposited in the right separation chamber of the first and second oil sludge separation chambers is cleaned through the manhole during the ship's regular maintenance.

[0016] When a ship is sailing and experiencing turbulence, the bilge water entering the container will dynamically tilt relative to the container. The funnel adaptive follow-up tilter automatically adjusts the inlet surface of the funnel to match the liquid level of the bilge water, thereby improving the oil-sludge separation effect.

[0017] The beneficial effects of this invention are:

[0018] First, the bilge water pretreatment sedimentation tank and bilge water pretreatment method of the present invention adopt a special three-stage oil-sludge separation chamber structure, which can significantly reduce the oil content of the bilge water flowing into the final third oil-sludge separation chamber. The oil can be directly discharged through the funnel on the three-stage oil-sludge separation chamber. This not only ensures the oil separation effect but also greatly improves the cleanliness of the sewage entering the bilge water storage tank, reducing the shipowner's operating and maintenance costs. This structural design reduces the oil concentration in the bilge water storage tank, effectively reduces the load on the oil-water separator, and is energy-saving and environmentally friendly.

[0019] Secondly, the bilge water pretreatment sedimentation tank and bilge water pretreatment method of the present invention are equipped with a funnel height position adjuster, which works in conjunction with a liquid level sensor to further optimize the effect of bilge water oil stratification treatment.

[0020] Third, the bilge water pretreatment sedimentation tank and bilge water pretreatment method of the present invention are equipped with a funnel adaptive follow-up tilter, which can fully adapt to the working conditions of ship navigation with turbulence and shaking. The funnel adaptive follow-up tilter automatically adjusts the inlet surface of the funnel to match the liquid level of the bilge water, thereby improving the oil and sludge separation effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a ship bilge water pretreatment sedimentation tank according to the present invention;

[0022] Figure 2 This is a schematic diagram of a funnel with a height position adjuster and an adaptive follow-up tilter.

[0023] Figure 3 This is a new type of bilge water settling tank specially designed by our company for a certain cargo ship.

[0024] In the diagram: 1. Box-type cabinet; 2. First main partition; 3. Second main partition; 4. First oil sludge separation chamber; 5. Second oil sludge separation chamber; 6. Third oil sludge separation chamber; 7. Secondary partition; 8. Left separation chamber; 9. Right separation chamber; 10. First funnel; 11. Second funnel; 12. Third funnel; 13. Oil sludge outlet pipe; 14. Brine inlet pipe; 15. Brine pretreatment outlet pipe; 16. Upper bilge pretreatment outlet pipe; 17. Lower bilge pretreatment outlet pipe; 18. Valve; 19. Curved guide channel; 20. Funnel height position adjuster; 21. Bellows; 22. Servo electric push rod; 23. Liquid level sensor; 24. Funnel adaptive follow-up tilter; 25. Ball joint rotating pair; 26. Horizontal extension arm; 27. Lifting rod; 28. Float; 29. ​​Baffle; 30. Spring. Detailed Implementation

[0025] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0026] Example 1:

[0027] like Figures 1 to 3The illustration shows an embodiment of a ship bilge water pretreatment sedimentation tank according to the present invention. It includes a fully enclosed box-type cabinet 1, and a first main partition 2 and a second main partition 3 arranged vertically from right to left within the box-type cabinet 1 at intervals. A first oil-water separation chamber 4 is formed between the first main partition 2 and the right side wall of the box-type cabinet 1; a second oil-water separation chamber 5 is formed between the first main partition 2 and the second main partition 3; and a third oil-water separation chamber 6 is formed between the second main partition 3 and the left side wall of the box-type cabinet 1. The first oil-water separation chamber 4 and the second oil-water separation chamber 5 are connected at the top and bottom of the first main partition 2, respectively, and the second oil-water separation chamber 5 and the third oil-water separation chamber 6 are connected at the top and bottom of the second main partition 3, respectively. A vertically erected part is also located at the bottom center of the second oil-water separation chamber 5. A partition 7 divides the second oil separation chamber 5 into a left separation chamber 8 and a right separation chamber 9 that are connected at the top. A funnel 10, 11, and 12 are provided in each of the first oil separation chamber 4, the second oil separation chamber 5, and the third oil separation chamber 6. The funnels 10, 11, and 12 include a first funnel 10 located at the top of the first oil separation chamber 4, a second funnel 11 located at the top of the left separation chamber 8 of the second oil separation chamber 5, and a third funnel 12 located at the top of the third oil separation chamber 6. The second funnel 11 and the third funnel 12 are at the same height, and the height of the first funnel 10 and the partition 7 are both lower than the heights of the second funnel 11 and the third funnel 12. Oil discharge pipes 13 are connected to the lower ends of the first funnel 10, the second funnel 11, and the third funnel 12, respectively.

[0028] Preferably, the height of the secondary partition 7 is higher than the height of the first funnel 10.

[0029] In this embodiment, the first oil separation chamber 4 is provided with a bilge water inlet pipe 14, and the outlet of the bilge water inlet pipe 14 is located at the middle side wall of the first oil separation chamber 4; the third oil separation chamber 6 is provided with a bilge water pretreatment outlet pipe 15.

[0030] In this embodiment, the bilge water pretreatment outlet pipe 15 includes an upper bilge water pretreatment outlet pipe 16 connected to the upper part of the third oil sludge separation chamber 6 and a lower bilge water pretreatment outlet pipe 17 connected to the lower part of the third oil sludge separation chamber 6. The ends of the upper bilge water pretreatment outlet pipe 16 and the lower bilge water pretreatment outlet pipe 17 located inside the third oil sludge separation chamber 6 are both located at the bottom of the third oil sludge separation chamber 6. The upper bilge water pretreatment outlet pipe 16 is equipped with a normally open valve 18, and the lower bilge water pretreatment outlet pipe 17 is equipped with a normally closed valve.

[0031] Preferably, a curved guide channel 19 is provided on the lower connecting port of the second main partition 3. The curved guide channel 19 is located in the third oil-stain separation chamber 6 and extends upward in the third oil-stain separation chamber 6.

[0032] As a further improvement, in this embodiment, a sedimentation tank for pretreatment of ship bilge water is further provided with a funnel height position adjuster 20 on the top of the box-type cabinet 1 for dynamically adjusting the height positions of the first funnel 10, the second funnel 11, and the third funnel 12; the funnel height position adjuster 20 includes a corrugated pipe 21 connected between the lower end of the funnels 10, 11, and 12 and the oil sludge outlet pipe 13, and a servo electric push rod 22 provided on the top of the box-type cabinet 1, the lower end telescopic rod of the servo electric push rod 22 being connected to the funnels 10, 11, and 12.

[0033] Preferably, a liquid level sensor 23 for detecting the liquid level inside the cabinet 1 is also provided on the top of the cabinet 1; the servo electric push rod 22 and the liquid level sensor 23 are respectively connected to the control system.

[0034] As a further improvement of this embodiment, the funnels 10, 11, and 12 are also provided with funnel adaptive follow-up tilters 24. The funnel adaptive follow-up tilters 24 include a ball joint rotating pair 25 connected between the front end of the telescopic rod of the servo electric push rod 22 and the center of the funnels 10, 11, and 12, a number of horizontal extension arms 26 arranged at intervals around the outer periphery of the funnels 10, 11, and 12, a lifting rod 27 movably disposed on the horizontal extension arms 26, a float ball 28 disposed on the upper end of the lifting rod 27 for floating on the liquid surface, a baffle 29 disposed on the lower end of the lifting rod 27, and a spring 30 sleeved on the lifting rod 27 and located between the horizontal extension arms 26 and the baffle 29.

[0035] Example 2:

[0036] A bilge water pretreatment method using the sedimentation tank of Embodiment 1 is as follows: Bulge water enters the first oil-sludge separation chamber 4 of the box-type cabinet 1 through the bilge water inlet pipe 14. The bilge water undergoes its first natural stratification in the first oil-sludge separation chamber 4, with sludge settling to the bottom of the tank and oil floating on the surface being discharged into the sludge tank or sludge tank through the first funnel 10. After the first natural stratification, the bilge water enters the right separation chamber 9 of the second oil-sludge separation chamber 5 through the connecting port at the lower part of the first main partition 2 for a second natural stratification. A small amount of sludge settles to the bottom of the tank, and oil floating on the surface is discharged through the left separation chamber 9 of the second oil-sludge separation chamber 5. The second funnel 11 at the top of the separation chamber 8 drains into the sludge tank or sludge tank; the bilge water after the second natural stratification treatment enters the third oil sludge separation chamber 6 from the left separation chamber 8 through the connecting port at the bottom of the second main bulkhead for the third natural stratification. A small amount of oil floating on the surface is drained into the sludge tank or sludge tank through the third funnel 12 at the top of the third oil sludge separation chamber 6; the bilge water after the third natural stratification treatment is discharged into the bilge water storage tank through the bilge water pretreatment outlet pipe 15 and the normally open valve 18; the sludge deposited in the right separation chamber 9 of the first oil sludge separation chamber 4 and the second oil sludge separation chamber 5 is cleaned through the manhole during the ship's regular maintenance.

[0037] When the ship is sailing and there is turbulence and rocking, the bilge water entering the container 1 will dynamically tilt relative to the container 1. The funnel adaptive follow-up tilter 24 automatically adjusts the inlet surface of funnels 10, 11, and 12 to match the liquid level of the bilge water, thereby improving the oil and sludge separation effect.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sedimentation tank for ship bilge water pretreatment using a three-separation chamber combined with a three-funnel oil removal system, characterized in that, The device includes a fully enclosed cabinet, and two main partitions arranged vertically from right to left within the cabinet, spaced apart. A first oil-stain separation chamber is formed between the first main partition and the right side wall of the cabinet; a second oil-stain separation chamber is formed between the first and second main partitions; and a third oil-stain separation chamber is formed between the second main partition and the left side wall of the cabinet. The first and second oil-stain separation chambers are connected at the top and bottom of the first main partition, and the second and third oil-stain separation chambers are also connected at the top and bottom of the second main partition. A curved flow channel is provided at the lower opening of the second main partition, located within the third oil-stain separation chamber, and the curved flow channel faces... The upper part curves and extends; at the bottom center of the second oil separation chamber, a secondary partition is erected facing the lower end of the curved guide channel, dividing the second oil separation chamber into a left separation chamber and a right separation chamber that are connected at the top; each of the first, second, and third oil separation chambers is provided with a funnel, including a first funnel located at the upper part of the first oil separation chamber, a second funnel located at the upper part of the left separation chamber of the second oil separation chamber, and a third funnel located at the upper part of the third oil separation chamber; the second and third funnels are set at the same height, and the height of the first funnel and the height of the secondary partition are both lower than the height of the second and third funnels; the lower ends of the first, second, and third funnels are respectively connected to oil discharge pipes; The top of the cabinet is equipped with funnel height position adjusters for dynamically adjusting the height of the first, second, and third funnels. Each funnel height position adjuster includes a corrugated pipe connecting the lower end of the funnel to the oil drain pipe, a servo electric push rod on the top of the cabinet, and a telescopic rod at the lower end of the servo electric push rod connected to the funnel. The funnel is also equipped with a funnel adaptive follow-up tilter, which includes a ball joint rotating joint connecting the front end of the telescopic rod of the servo electric push rod to the center of the funnel, a number of horizontal extension arms spaced circumferentially around the outer periphery of the funnel, a lifting rod movable on the horizontal extension arms, a float ball on the upper end of the lifting rod for floating on the liquid surface, a baffle on the lower end of the lifting rod, and a spring sleeved on the lifting rod and located between the horizontal extension arms and the baffle.

2. The sedimentation tank for ship bilge water pretreatment using a three-separation chamber combined with a three-funnel oil removal system according to claim 1, characterized in that, The height of the secondary partition is higher than the height of the first funnel.

3. A sedimentation tank for ship bilge water pretreatment using a three-separation chamber combined with a three-funnel oil removal system according to claim 1, characterized in that, The first oil sludge separation chamber is equipped with a bilge water inlet pipe, and the outlet of the bilge water inlet pipe is located on the middle side wall of the first oil sludge separation chamber; the third oil sludge separation chamber is equipped with a bilge water pretreatment outlet pipe.

4. A sedimentation tank for ship bilge water pretreatment using a three-separation chamber combined with a three-funnel oil removal system according to claim 3, characterized in that, The bilge water pretreatment outlet pipe includes an upper bilge water pretreatment outlet pipe connected to the upper part of the third oil sludge separation chamber and a lower bilge water pretreatment outlet pipe connected to the lower part of the third oil sludge separation chamber. The pipe ends of both the upper and lower bilge water pretreatment outlet pipes located inside the third oil sludge separation chamber are located at the bottom of the third oil sludge separation chamber. The upper bilge water pretreatment outlet pipe is equipped with a normally open valve, and the lower bilge water pretreatment outlet pipe is equipped with a normally closed valve.

5. A sedimentation tank for ship bilge water pretreatment using a three-separation chamber combined with a three-funnel oil removal system according to claim 1, characterized in that, A liquid level sensor for detecting the liquid level inside the cabinet is also installed on the top of the cabinet; the servo electric push rod and the liquid level sensor are respectively connected to the control system.

6. A bilge water pretreatment method using a sedimentation tank with a three-separation chamber combined with a three-funnel oil removal system as described in any one of claims 1 to 5, characterized in that, The bilge water enters the first oil separation chamber of the container through the bilge water inlet pipe. The bilge water undergoes the first natural stratification in the first oil separation chamber. The sludge sinks to the bottom of the chamber, and the oil floating on the surface is discharged into the sludge tank or sludge tank through the first funnel. After the first natural stratification process, the bilge water enters the right separation chamber of the second oil sludge separation chamber through the connecting port at the bottom of the first main bulkhead for the second natural stratification. A small amount of sludge sinks to the bottom of the tank, while the oil sludge floating on the surface is discharged into the sludge tank or sludge tank through the second funnel located at the top of the left separation chamber of the second oil sludge separation chamber. After the second natural stratification treatment, the bilge water enters the third oil sludge separation chamber from the left separation chamber through the connecting port at the bottom of the second main bulkhead, where it undergoes a third natural stratification. A small amount of oil sludge floating on the surface is discharged into the sludge tank or sludge tank through the third funnel located at the top of the third oil sludge separation chamber. The bilge water that has undergone the third natural stratification treatment is discharged into the bilge water storage tank through the bilge water pretreatment outlet pipe and normally open valve. The sludge deposited in the right separation chamber of the first and second oil sludge separation chambers is cleaned through the manhole during the ship's regular maintenance.

7. The bilge water pretreatment method according to claim 6, employing a three-separation chamber combined with a three-funnel oil removal system in a sedimentation tank, is characterized in that... When a ship is sailing and experiencing turbulence, the bilge water entering the container will dynamically tilt relative to the container. The funnel adaptive follow-up tilter automatically adjusts the inlet surface of the funnel to match the liquid level of the bilge water, thereby improving the oil-sludge separation effect.

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