Ballast water system neutralizing agent mixing device and ship

Abstract

The present invention provides a neutralizing agent mixing device for a ballast water system, comprising a neutralization tank, an aeration head, and an air inlet pipeline. The top of the neutralization tank is provided with a freshwater inlet and a neutralizer dosing port, and the bottom of the neutralization tank is provided with a liquid medicine dosing port. The aeration head is disposed at the bottom of the neutralization tank, and the air inlet pipeline is connected to the aeration head. The neutralization tank is also provided with a zone-dividing sieve plate, which is located above the aeration head. The present invention also provides a vessel.

Description

Technical Field

[0001] The present invention relates to the technical field of ballast water treatment, and in particular to a neutralizing agent mixing device in a ballast water system and a ship. Background Art

[0002] In the field of ship technology, electrolysis has been widely used as one of the main methods of ballast water treatment technology. Its principle is to inject high-concentration oxidants such as sodium hypochlorite into the ballast water to effectively kill plankton, pathogens and their larvae or spores in the ballast tanks to achieve the specified sterilization effect (D-2 and other standards). However, after the oxidants generated by the electrolysis method achieve the sterilization effect, some oxidants may still remain in the ballast water (the oxidants are not completely reacted), which does not meet the emission standards. Therefore, a neutralization and dosing module is required to neutralize the oxidants in the ballast water by adding a reducing agent to meet the emission requirements. Among them, the neutralization and dosing module includes a neutralization agent mixing device and a dosing device.

[0003] Existing neutralizing agent mixing devices generally consist of a neutralizing tank and an impeller agitator. The tank is made of steel-lined polyurea, and the top is sealed by a flange cover. The flange cover features a neutralizing agent dosing port, a fresh water inlet, and a motor mounting port. A motor mounted on the top of the tank drives an impeller agitator extending into the tank to stir the neutralizing agent to meet usage requirements. The steel-lined polyurea tank and the motor are relatively expensive and require regular maintenance. Furthermore, installing the motor on the top of the tank increases the overall height and maintenance space of the device, reducing its adaptability for installation within a vessel. Summary of the Invention

[0004] The object of the present invention is to provide a neutralizing agent mixing device in a ballast water system, aiming to solve or at least partially solve the deficiencies of the above-mentioned background technology, thereby reducing equipment costs and equipment maintenance workload.

[0005] The present invention provides a neutralizing agent mixing device for a ballast water system, comprising a neutralization storage tank, an aeration head and an air inlet pipeline. The top of the neutralization storage tank is provided with a fresh water injection port and a neutralizer dosing port, and the bottom of the neutralization storage tank is provided with a liquid medicine dosing port; the aeration head is arranged at the bottom of the neutralization storage tank, and the air inlet pipeline is connected to the aeration head; the neutralization storage tank is also provided with a region dividing sieve plate, and the region dividing sieve plate is located above the aeration head.

[0006] Furthermore, there are multiple aeration heads, which are arranged in a spiral shape, and the exhaust ports of the multiple aeration heads are all arranged obliquely downward.

[0007] Furthermore, there are multiple aeration heads, wherein the exhaust ports of some of the aeration heads are arranged upward, and the exhaust ports of other parts of the aeration heads are arranged downward.

[0008] Furthermore, the air inlet pipeline includes a main pipeline and multiple branch pipelines, the main pipeline is connected to the multiple branch pipelines at the same time, and the multiple branch pipelines are respectively connected to the multiple aeration heads.

[0009] Furthermore, the region dividing sieve plate includes a supporting layer and a filtering layer, the supporting layer is bonded to the filtering layer, and the supporting layer is provided with through holes.

[0010] Furthermore, the region dividing screen plate further includes a fixing bracket, and the filter layer is sandwiched between the supporting layer and the fixing bracket.

[0011] Furthermore, there are multiple through holes, and the multiple through holes are evenly spaced and arranged on the supporting layer.

[0012] Furthermore, a threaded hole is provided at the bottom of the neutralization storage tank, and the aeration head and the air inlet pipeline are respectively connected to both sides of the threaded hole through threads.

[0013] Furthermore, the neutralization storage tank is made of HDPE material.

[0014] Furthermore, the neutralization storage tank is provided with a liquid level gauge.

[0015] Furthermore, the neutralizing agent mixing device in the ballast water system also includes a drainage pipeline, and the bottom of the neutralization storage tank is also provided with a discharge port, and the drainage pipeline is connected to the discharge port.

[0016] Furthermore, an overflow port is provided on the top of the neutralization storage tank, and the overflow port is connected to the drainage pipeline through a bypass pipeline.

[0017] Furthermore, an air pressure regulating filter is provided on the air intake pipeline.

[0018] The present invention also provides a ship, comprising the above-mentioned neutralizing agent mixing device in the ballast water system.

[0019] The ballast water system neutralizing agent mixing device provided by the present invention utilizes an aeration head as an auxiliary mixing device, which can save equipment costs, reduce the overall height and maintenance space of the device, and improve the device's installation adaptability. Furthermore, the device uses compressed air as its power source, ensuring stable operation and excellent dissolution efficiency, significantly reducing the workload of daily equipment maintenance. Furthermore, a zone-dividing sieve plate is provided within the neutralization tank to prevent undissolved solid neutralizer from sinking to the bottom of the tank, thereby increasing the neutralizer's dissolution rate and preventing accumulation of neutralizer at the bottom of the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the neutralizing agent mixing device in the ballast water system in an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the internal structure of the neutralization storage tank in an embodiment of the present invention.

[0022] Figure 3 Schematic cross-sectional view of the regional partitioning sieve plate in an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the structure of the support layer in an embodiment of the present invention.

[0024] Figure 5 Schematic diagram of the structure of the fixing bracket in an embodiment of the present invention.

[0025] Figure 6 This is a schematic structural diagram of a neutralizing agent mixing device in a ballast water system in another embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] The terms "first," "second," "third," "fourth," and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequential order or sequence.

[0028] like Figure 1 As shown, the neutralizing agent mixing device in the ballast water system provided by the embodiment of the present invention includes a neutralization tank 1, an aeration head 2 and an air inlet pipe 3. A fresh water injection port 11 and a neutralizer dosing port 12 are provided at the top of the neutralization tank 1, and a liquid medicine dosing port 13 is provided at the bottom of the neutralization tank 1; the aeration head 2 is arranged at the bottom of the neutralization tank 1, one end of the air inlet pipe 3 is connected to the aeration head 2, and the other end of the air inlet pipe 3 is connected to the compressed air source. A region dividing sieve plate 17 is also provided in the neutralization tank 1. The region dividing sieve plate 17 is located above the aeration head 2, and the region dividing sieve plate 17 is located between the neutralizer dosing port 12 and the liquid medicine dosing port 13. The region dividing sieve plate 17 divides the internal space of the neutralization tank 1 into two separated upper and lower areas. The region dividing sieve plate 17 can pass through liquid and gas and block solid neutralizer.

[0029] Specifically, in this embodiment, the neutralization tank 1 serves as a reaction vessel and a storage vessel. When preparing the neutralizer solution, fresh water and a solid neutralizer (e.g., sodium thiosulfate powder) are injected into the neutralization tank 1 from the fresh water inlet 11 and the neutralizer dosing port 12 of the neutralization tank 1, respectively. The compressed air in the air inlet line 3 is injected into the neutralization tank 1 through the aeration head 2. The compressed air disturbs the fresh water and the solid neutralizer in the neutralization tank 1 (i.e., it assists in mixing), thereby accelerating the dissolution of the solid neutralizer in the fresh water to prepare the neutralizer solution. Among them, the aeration head 2 disperses the compressed air. The aeration head 2 disperses the air that has gathered in the air inlet line 3 into a plurality of uniform small bubbles and injects them into the neutralization tank 1, thereby improving the disturbance ability of the compressed air, i.e., improving the mixing effect (at the same time, the aeration head 2 is set at the bottom of the neutralization tank 1, which can increase the contact time between the bubbles and the solution, thereby further improving the mixing effect). At the same time, the regional dividing sieve plate 17 can play a filtering role, preventing undissolved solid neutralizer from sinking and accumulating at the bottom of the neutralization storage tank 1, and preventing undissolved solid neutralizer from being discharged directly from the liquid injection port 13; moreover, since the regional dividing sieve plate 17 is located above the aeration head 2, the solid neutralizer that falls on the regional dividing sieve plate 17 can always be disturbed by the air, so that the solid neutralizer continues to dissolve, thereby increasing the dissolution rate of the neutralizer. The prepared neutralizer solution is temporarily stored in the neutralization storage tank 1. When the ballast water is discharged, the neutralizer solution in the neutralization storage tank 1 is injected into the ballast water discharge pipeline (not shown) from the liquid injection port 13 through the dosing device (not shown in the figure, such as a metering pump). The neutralizer solution reacts with the unreacted oxidant in the ballast water to neutralize the ballast water, thereby achieving the neutralization treatment of the ballast water, so that the discharge of the ballast water meets the relevant requirements.

[0030] Preferably, if Figure 1 and Figure 2 As shown, in this embodiment, the area dividing sieve plate 17 is arranged in the lower middle position of the neutralization storage tank 1, so as to increase the contact disturbance time between the compressed air and the solid neutralizer falling on the area dividing sieve plate 17 as much as possible to improve the dissolution efficiency.

[0031] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, there are multiple aeration heads 2, and the multiple aeration heads 2 are arranged in a spiral shape (that is, the multiple aeration heads 2 are arranged in a center-surrounding interval arrangement), and the exhaust ports of the multiple aeration heads 2 are all arranged obliquely downward (that is, the small micropores on the aeration heads 2 are arranged obliquely downward).

[0032] Specifically, in this embodiment, aeration head 2 utilizes a microporous disc aeration head. Specifically, aeration head 2 includes a rubber diaphragm (not numbered) provided with numerous tiny pores. Compressed air enters aeration head 2 and is discharged through these pores. Because the multiple aeration heads 2 are arranged in a spiral pattern, with their exhaust ports angled downward, the compressed air ejected from the multiple aeration heads 2 propels the solution within the neutralization tank 1 into a swirling flow, thereby enhancing the compressed air's agitation and further improving the mixing effect.

[0033] Furthermore, if Figure 1 and Figure 2 As shown, in this embodiment, the plurality of aeration heads 2 include a first aeration head 21, a second aeration head 22, and a third aeration head 23. The first aeration head 21, the second aeration head 22, and the third aeration head 23 are arranged in a spiral shape. Of course, in other embodiments, the number of aeration heads 2 can be greater, and the number of aeration heads 2 can be determined according to actual needs.

[0034] like Figure 6 As shown, in another embodiment, there are multiple aeration heads 2, wherein the exhaust ports of some aeration heads 2 are set upward, while the exhaust ports of other aeration heads 2 are set downward. Specifically, the aeration heads 2 include a first aeration head 21 and a second aeration head 22. The exhaust port of the first aeration head 21 is set upward, and the exhaust port of the second aeration head 22 is set downward. There are two first aeration heads 21 and two second aeration heads 22 (illustrated as one each in the figure; of course, in other embodiments, the number of aeration heads 2 can be determined based on actual needs). That is, the tiny micropores on the rubber diaphragm of the first aeration head 21 are set upward, and the tiny micropores on the rubber diaphragm of the second aeration head 22 are set downward. By arranging the exhaust ports of the first aeration head 21 and the second aeration head 22 in different directions, the compressed air is ejected in different directions, thereby improving the disturbance capacity of the compressed air, that is, improving the mixing effect.

[0035] Furthermore, if Figure 1 As shown, in this embodiment, the air intake pipeline 3 includes a main pipeline 31 and multiple branch pipelines 32. The main pipeline 31 is connected to the multiple branch pipelines 32 at the same time, and the multiple branch pipelines 32 are respectively connected to multiple aeration heads 2 (in this embodiment, there are three branch pipelines 32, and the three branch pipelines 32 are respectively connected to the first aeration head 21, the second aeration head 22 and the third aeration head 23).

[0036] Furthermore, if Figure 3 and Figure 4As shown, in this embodiment, the region-dividing sieve plate 17 includes a support layer 171 and a filter layer 172. The support layer 171 is bonded to the filter layer 172, and the support layer 171 is provided with through holes 174. There are multiple through holes 174, which are evenly spaced and arranged on the support layer 171. Gas and liquid can pass through the support layer 171 through the through holes 174.

[0037] Specifically, in this embodiment, filter layer 172 performs a filtering function and can be made of filter cotton (e.g., PP cotton). Support layer 171 supports filter layer 172 and can be made of plastic, HDPE, stainless steel, etc. Because support layer 171 is evenly spaced with multiple through holes 174, combined with the gas dispersion and filtration function of filter layer 172, the segmented sieve plate 17 can further disperse the compressed air, dispersing it into uniform small bubbles and improving the mixing effect.

[0038] Furthermore, if Figure 3 and Figure 5 As shown, in this embodiment, the region dividing sieve plate 17 further includes a fixing bracket 173 , and the filter layer 172 is sandwiched between the supporting layer 171 and the fixing bracket 173 .

[0039] Specifically, in this embodiment, support layer 171 is located below filter layer 172, and fixing bracket 173 is located above filter layer 172. Fixing bracket 173 has a cross-shaped structure (of course, fixing bracket 173 can also have other shapes). The clamping action of support layer 171 and fixing bracket 173 stabilizes filter layer 172 and prevents deformation, allowing it to continuously and stably perform its filtering function.

[0040] Furthermore, if Figure 1 As shown, in this embodiment, a threaded hole 16 is provided at the bottom of the neutralization storage tank 1 , and the aeration head 2 and the air inlet pipe 3 are respectively connected to both sides of the threaded hole 16 through threads.

[0041] Specifically, in this embodiment, the air inlet end of the aerator head 2 is threadedly connected to the inner side of the threaded hole 16, and the air inlet pipe 3 is threadedly connected to the outer side of the threaded hole 16. In this embodiment, both the aerator head 2 and the air inlet pipe 3 are threadedly connected to the threaded hole 16, which not only facilitates installation but also easy disassembly, facilitating the maintenance and replacement of parts.

[0042] Furthermore, in this embodiment, the neutralization tank 1 is made of HDPE (High Density Polyethylene). HDPE not only has good hardness and corrosion resistance, but is also less expensive than steel-lined polyurea, thereby reducing the cost of the neutralization tank 1.

[0043] Furthermore, if Figure 1 As shown, in this embodiment, the neutralization agent mixing device in the ballast water system further includes a fresh water injection pipeline 9, which is connected to the fresh water injection port 11 of the neutralization storage tank 1 for injecting fresh water into the neutralization storage tank 1.

[0044] Furthermore, if Figure 1 As shown, in this embodiment, a liquid level gauge 4 is provided on the neutralization storage tank 1. The liquid level gauge 4 is used to detect the liquid level of the neutralizer solution in the neutralization storage tank 1. According to the liquid level height, it can be determined whether the neutralizer solution needs to be replenished, thereby realizing automatic preparation of the neutralizer solution.

[0045] Furthermore, if Figure 1 As shown, in this embodiment, the neutralization agent mixing device in the ballast water system further includes a drainage pipeline 5 , and a discharge port 14 is further provided at the bottom of the neutralization storage tank 1 , and the drainage pipeline 5 is connected to the discharge port 14 .

[0046] Specifically, in this embodiment, when the neutralizer solution in the neutralization tank 1 is expired or the neutralization tank 1 needs to be repaired, the neutralizer solution in the neutralization tank 1 can be discharged through the drain pipe 5.

[0047] Furthermore, if Figure 1 As shown, in this embodiment, the top of the neutralization tank 1 is further provided with an overflow port 15, which is connected to the drain pipe 5 through a bypass pipe 6. When the liquid level in the neutralization tank 1 exceeds the overflow port 15, the neutralizer solution in the neutralization tank 1 can be discharged to the drain pipe 5 through the bypass pipe 6.

[0048] Furthermore, if Figure 1 As shown, in this embodiment, an air pressure regulating filter 7 is provided on the air intake pipe 3 .

[0049] Specifically, in this embodiment, the air pressure regulating filter 7 is provided on the main line 31 , and the air pressure regulating filter 7 is used to filter out impurities entrained in the compressed air, so that the air entering the neutralization storage tank 1 is cleaner.

[0050] Furthermore, if Figure 1 As shown, in this embodiment, an air switch valve 81 is provided on the air intake pipeline 3 (an air switch valve 81 is provided on each branch pipeline 32, and the air switch valve 81 can be a sleeve-type stop valve), a check valve 82 is provided on the fresh water injection pipeline 9, an overflow valve 83 is provided on the bypass pipeline 6, and a discharge valve 84 is provided on the discharge pipeline 5.

[0051] An embodiment of the present invention further provides a ship, comprising the neutralizing agent mixing device in the ballast water system described above.

[0052] The advantages of the neutralizing agent mixing device in a ballast water system provided by the embodiment of the present invention include:

[0053] 1. Using compressed air as the power source and the aeration head 2 as the auxiliary mixing device instead of the electric motor and impeller agitator can save equipment costs, reduce the overall height and maintenance space of the device, and improve the installation adaptability of the device. At the same time, the device operates stably, greatly reducing the daily equipment maintenance workload;

[0054] 2. The device has a good dissolving effect. The standard stirring time using an electric motor and an impeller stirrer is 50 minutes, while this device uses compressed air stirring, which can be shortened to 30 minutes;

[0055] 3. The device can be placed in the ship's engine room, where there is sufficient compressed air, thus reducing the cost of use;

[0056] 4. The neutralization storage tank 1 is made of HDPE material instead of the original steel-lined polyurea material, which reduces the cost of the neutralization storage tank 1.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A neutralizing agent mixing device in a ballast water system, characterized in that: The invention comprises a neutralization storage tank (1), an aeration head (2) and an air inlet pipe (3); the top of the neutralization storage tank (1) is provided with a fresh water injection port (11) and a neutralizer dosing port (12); the bottom of the neutralization storage tank (1) is provided with a liquid medicine dosing port (13); the aeration head (2) is a microporous disc aeration head, the aeration head (2) is arranged at the bottom of the neutralization storage tank (1), and the air inlet pipe (3) is connected to the aeration head (2); the neutralization storage tank (1) is further provided with a region dividing sieve plate (17), the region dividing sieve plate (17) is located above the aeration head (2), and the region dividing sieve plate (17) is located between the neutralizer dosing port (12) and the liquid medicine dosing port (13); the region dividing sieve plate (17) can pass through liquid and gas and block solid neutralizer.

2. The neutralizing agent mixing device in the ballast water system according to claim 1, characterized in that: There are multiple aeration heads (2), and the multiple aeration heads (2) are arranged in a spiral shape, and the exhaust ports of the multiple aeration heads (2) are all arranged obliquely downward.

3. The neutralizing agent mixing device in the ballast water system according to claim 1, characterized in that: There are multiple aeration heads (2), wherein the exhaust ports of some of the aeration heads (2) are arranged upward, and the exhaust ports of another part of the aeration heads (2) are arranged downward.

4. The neutralizing agent mixing device for a ballast water system according to claim 2 or 3, characterized in that: The air inlet pipeline (3) comprises a main pipeline (31) and a plurality of branch pipelines (32); the main pipeline (31) is simultaneously connected to the plurality of branch pipelines (32); and the plurality of branch pipelines (32) are respectively connected to the plurality of aeration heads (2).

5. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: The region dividing sieve plate (17) comprises a supporting layer (171) and a filtering layer (172), wherein the supporting layer (171) is bonded to the filtering layer (172), and a through hole (174) is provided on the supporting layer (171).

6. The neutralizing agent mixing device for a ballast water system according to claim 5, characterized in that: The region-dividing sieve plate (17) further includes a fixing bracket (173), and the filter layer (172) is sandwiched between the supporting layer (171) and the fixing bracket (173).

7. The neutralizing agent mixing device for a ballast water system according to claim 5, characterized in that: There are a plurality of through holes (174), and the plurality of through holes (174) are evenly spaced and arranged on the supporting layer (171).

8. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: A threaded hole (16) is provided at the bottom of the neutralization storage tank (1), and the aeration head (2) and the air inlet pipeline (3) are respectively connected to both sides of the threaded hole (16) through threads.

9. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: The neutralization storage tank (1) is made of HDPE material.

10. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: The neutralization storage tank (1) is provided with a liquid level gauge (4).

11. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: The neutralization agent mixing device in the ballast water system further comprises a drainage pipeline (5), and a discharge port (14) is further provided at the bottom of the neutralization storage tank (1), and the drainage pipeline (5) is in communication with the discharge port (14).

12. The neutralizing agent mixing device for a ballast water system according to claim 11, characterized in that: The top of the neutralization storage tank (1) is also provided with an overflow port (15), and the overflow port (15) is connected to the drainage pipeline (5) through a bypass pipeline (6).

13. The neutralizing agent mixing device for a ballast water system according to claim 1, characterized in that: An air pressure regulating filter (7) is provided on the air intake pipeline (3).

14. A ship, characterized in that: The ballast water system comprises the neutralizing agent mixing device according to any one of claims 1 to 13.

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