Waste liquid treatment device and ship engine

Abstract

The utility model relates to the technical field of waste liquid treatment, and discloses a waste liquid treatment device and a ship engine, the waste liquid treatment device comprises a cabinet body, the interior of the cabinet body is divided into an oil separation area and a neutralization area by a partition plate, and the bottom of the partition plate is provided with a liquid discharge channel communicated with the oil separation area and the neutralization area; a waste liquid inlet and an oil discharge outlet are formed in the side wall of the oil separation area, and the oil discharge outlet is formed above the waste liquid inlet and located at the oil layer position of the oil separation area; the neutralizing area is provided with a neutralizer feeding port and an overflow port, and in the height direction of the cabinet body, the liquid inlet end of the overflow port is higher than the oil discharging port. The cabinet body is divided into the oil separation area and the neutralization area through the partition plate, oil located on the top layer is discharged through the oil discharge outlet in the oil separation area by means of the density difference of oil and water, primary oil separation is achieved, a neutralizer is introduced into the neutralization area to be subjected to a saponification reaction with oil in waste liquid, the oil is further removed, the oil in the waste liquid can be effectively removed, and the service life of the waste liquid is prolonged. And the grease removal effect is relatively good.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, specifically to waste liquid treatment devices and marine engines. Background Technology

[0002] To reduce harmful gases emitted by ship engines, such as nitrogen oxides (NOx) x Marine engines typically employ exhaust gas recirculation (EGR) systems to purify harmful gases emitted by marine engines, including particulate matter (PM).

[0003] EGR systems reduce NO by reintroducing a portion of exhaust gas into the engine's intake system, mixing it with fresh air, and then re-entering the combustion chamber. This lowers combustion temperature and oxygen concentration. x The EGR system generates waste liquid containing grease during operation.

[0004] However, existing EGR systems often neglect the treatment of grease in waste fluid. Grease can contaminate EGR systems, affecting their performance and lifespan. Especially in ships using heavy fuel oil, the circulation of grease in the EGR system can lead to problems such as carbon buildup and sludge, and in severe cases, even cause engine failure. Utility Model Content

[0005] In view of this, the present invention provides a waste liquid treatment device and a marine engine to solve the problem that the existing EGR system neglects the treatment of grease in the waste liquid, which leads to grease contamination of the EGR system, affecting its performance and lifespan, and even causing marine engine failure.

[0006] In a first aspect, this utility model provides a waste liquid treatment device, comprising:

[0007] The cabinet is internally divided into an oil-separating area and a neutralizing area by a partition, and the bottom of the partition is provided with a drainage channel connecting the oil-separating area and the neutralizing area;

[0008] The sidewalls of the oil separator are respectively provided with a waste liquid inlet and an oil outlet, and the oil outlet is installed above the waste liquid inlet and located at the oil layer position of the oil separator.

[0009] The neutralization zone is provided with a neutralizing agent inlet and an overflow outlet. In the height direction of the cabinet, the liquid inlet of the overflow outlet is higher than the oil outlet.

[0010] Beneficial Effects: The waste liquid treatment device of this utility model divides the cabinet into an oil-separation zone and a neutralization zone through a partition. The EGR system discharges a mixture of oil and water into the oil-separation zone through the waste liquid inlet. In the oil-separation zone, utilizing the density difference between oil and water, grease and oily substances are suspended on the surface of the waste liquid and discharged from the oil outlet at the top, achieving preliminary separation of oil and water. Afterward, the preliminarily separated waste liquid enters the neutralization zone through the drainage channel at the bottom of the partition. In the neutralization zone, a neutralizing agent is introduced to undergo a saponification reaction with the grease in the waste liquid, further removing the grease. Finally, the waste liquid is discharged from the overflow outlet. Therefore, this utility model can effectively remove grease from the waste liquid of the EGR system, improve the operational stability of the marine engine, and prevent grease from contaminating the EGR system and affecting the operation of the marine engine. Moreover, the height of the liquid inlet of the overflow outlet is higher than the height of the oil outlet, ensuring that wastewater is discharged from the overflow outlet while suspended grease is discharged from the oil outlet, preventing the wastewater from being discharged from the oil outlet before the water level reaches the liquid inlet of the overflow outlet.

[0011] In one optional embodiment, the overflow port is connected to a drain pipe located inside the neutralization zone, and in the height direction of the cabinet, the height of the inlet end of the drain pipe is higher than the height of the oil outlet.

[0012] Beneficial effects: Connecting a drain pipe to the overflow port can reduce the impact of waste liquid at the inlet end by using the curved pipe body, reduce air bubbles, facilitate smooth discharge of waste liquid, and make the installation position of the drain pipe more flexible, which is convenient for subsequent maintenance and management.

[0013] In one alternative embodiment, the waste liquid inlet and the oil outlet are located on the side of the oil-separating zone away from the partition.

[0014] Beneficial effects: By placing the waste liquid inlet and oil outlet on the side of the oil separation zone away from the baffle, the waste liquid can be fully pre-separated in the oil separation zone, further improving the grease removal effect and preventing the waste liquid from directly entering the neutralization zone from the drain channel.

[0015] In one alternative embodiment, the neutralizing agent inlet and the overflow outlet are located on the side of the neutralization zone away from the partition.

[0016] Beneficial effects: By placing the neutralizing agent inlet and overflow outlet on the side of the neutralization zone away from the partition, the neutralizing agent can be evenly distributed in the neutralization zone for saponification reaction, further improving the grease removal effect and preventing the neutralizing agent from entering the oil separation zone through the drain channel.

[0017] In one alternative embodiment, a stirrer is also provided in the neutralization zone, the stirrer being vertically arranged and passing through the top wall of the neutralization zone.

[0018] Beneficial effects: The agitator ensures that the neutralizing agent and waste liquid in the neutralization zone flow evenly and mix thoroughly, increasing the rate of the saponification reaction and further improving the grease removal effect. The agitator is vertically positioned and passes through the top wall of the neutralization zone for easy maintenance and replacement.

[0019] In one alternative embodiment, an acid-base meter is also provided in the neutralization zone.

[0020] Beneficial effects: The pH meter is used to detect the pH value of the waste liquid in the neutralization zone in real time. The amount of neutralizing agent added is adjusted according to the pH value, thereby ensuring the stable progress of the saponification reaction and improving the oil removal effect. In addition, it can also ensure that the pH value of the waste liquid in the neutralization zone is within a certain range to meet the discharge standards for waste liquid pH value.

[0021] In one optional embodiment, the top of the oil-separating zone and the neutralizing zone are respectively provided with exhaust ports.

[0022] Beneficial effects: The gas generated during the waste liquid treatment process is discharged through the exhaust vents at the top of the oil separation zone and neutralization zone, preventing waste gas from accumulating inside the cabinet and affecting waste liquid treatment.

[0023] In one optional embodiment, the bottom of the sidewall of the neutralization zone is further provided with a liquid outlet, which is located below the overflow port.

[0024] Beneficial effects: Waste liquid inside the cabinet can be completely drained through the outlet, facilitating cabinet maintenance. During the waste liquid treatment process, the outlet should be kept closed to prevent the discharge of untreated grease.

[0025] In one alternative embodiment, the top of the partition is connected to the top wall of the cabinet, and a gap is left between the bottom of the partition and the bottom wall of the cabinet to form the drainage channel.

[0026] Beneficial effects: The top of the partition is connected to the top wall of the cabinet, and a gap is left between the bottom of the partition and the bottom wall of the cabinet to form a drainage channel, which facilitates the installation and removal of the partition without the need for additional processing of the drainage channel, thus reducing manufacturing costs.

[0027] Secondly, this utility model also provides a marine engine, comprising:

[0028] The exhaust gas recirculation system is equipped with a drain outlet;

[0029] In the aforementioned waste liquid treatment device, the discharge port is connected to the waste liquid inlet.

[0030] Beneficial Effects: Because marine engines include wastewater treatment devices, this system achieves the same effect as a wastewater treatment device, namely, dividing the cabinet into an oil-separation zone and a neutralization zone via a partition. The EGR system discharges a mixture of oil and water into the oil-separation zone through the wastewater inlet. In the oil-separation zone, utilizing the density difference between oil and water, grease and oily substances suspend on the surface of the wastewater and are discharged from the upper oil outlet, achieving initial oil-water separation. After initial separation, the wastewater enters the neutralization zone through the drainage channel at the bottom of the partition. In the neutralization zone, a neutralizing agent is introduced to react with the grease in the wastewater through a saponification reaction, further removing the grease. Finally, the wastewater is discharged from the overflow outlet. Therefore, this invention can effectively remove grease from the wastewater of the EGR system, improve the operational stability of the marine engine, and prevent grease from contaminating the EGR system and affecting the operation of the marine engine. Furthermore, the height of the inlet end of the overflow outlet is higher than the height of the oil outlet, ensuring that wastewater is discharged from the overflow outlet while suspended grease is discharged from the oil outlet, preventing the wastewater from being discharged from the oil outlet before the water level reaches the inlet end of the overflow outlet. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a waste liquid treatment device according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Cabinet; 101. Oil separation zone; 102. Neutralization zone; 103. Drainage channel; 104. Waste liquid inlet; 105. Oil drain outlet; 106. Neutralizing agent inlet; 107. Overflow outlet; 1071. Liquid inlet end; 108. Exhaust outlet; 109. Liquid outlet; 2. Partition; 3. Drainage pipe; 4. Stirrer; 5. Acid-base meter. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] The following is combined with Figure 1 The following describes embodiments of the present invention.

[0037] According to embodiments of the present invention, on the one hand, such as Figure 1 As shown, a waste liquid treatment device is provided, including: a cabinet 1. The interior of the cabinet 1 is divided into an oil-separating zone 101 and a neutralizing zone 102 by a partition 2. The bottom of the partition 2 is provided with a drain channel 103 connecting the oil-separating zone 101 and the neutralizing zone 102. The side walls of the oil-separating zone 101 are respectively provided with a waste liquid inlet 104 and an oil outlet 105. The oil outlet 105 is installed above the waste liquid inlet 104 and located at the oil layer position of the oil-separating zone 101. The neutralizing zone 102 is provided with a neutralizing agent inlet 106 and an overflow outlet 107. In the height direction of the cabinet 1, the height of the liquid inlet end 1071 of the overflow outlet 107 is higher than the height of the oil outlet 105.

[0038] Therefore, the waste liquid treatment device provided in this embodiment of the invention divides the cabinet 1 into an oil-separating zone 101 and a neutralizing zone 102 by a partition 2. The EGR system discharges oil-mixed waste liquid into the oil-separating zone 101 through the waste liquid inlet 104. In the oil-separating zone 101, due to the density difference between oil and water, grease and oily substances are suspended on the surface of the waste liquid and discharged from the upper oil outlet 105, achieving preliminary separation of oil and liquid. Afterward, the preliminarily separated waste liquid enters the neutralizing zone 102 through the drain channel 103 at the bottom of the partition 2. In the neutralizing zone 102, a neutralizing agent is introduced to react with the grease in the waste liquid through a saponification reaction, further removing the grease. Finally, the waste liquid is discharged from the overflow outlet 107. Therefore, this embodiment of the invention can effectively remove grease from the waste liquid of the EGR system, improve the operational stability of the ship's engine, and prevent grease from contaminating the EGR system and affecting the operation of the ship's engine.

[0039] Furthermore, the height of the liquid inlet 1071 of the overflow port 107 is higher than the height of the oil outlet 105, which ensures that wastewater is discharged from the overflow port 107 and suspended grease is discharged from the oil outlet 105, thus preventing the wastewater from being discharged from the oil outlet 105 before the water level reaches the liquid inlet 1071 of the overflow port 107.

[0040] Traditional ship water treatment generally only treats domestic sewage and ballast water, making it difficult to directly remove grease. Currently, oil-water separators, membrane filtration equipment, and chemical treatment equipment are commonly used to treat oily wastewater. However, oil-water separators and membrane filtration equipment suffer from poor grease removal efficiency and are prone to clogging. Chemical treatment equipment often requires multiple chemical treatment steps when treating oily wastewater, resulting in high operating costs, and the chemicals can easily cause secondary pollution to the environment. The wastewater treatment device provided in this embodiment of the invention removes grease in two stages: an oil separation zone 101 and a neutralization zone 102, significantly improving grease removal efficiency and avoiding grease clogging problems. The wastewater treatment device provided in this embodiment of the invention utilizes the density difference between oil and water and the saponification reaction of grease with alkali to remove grease, resulting in lower overall manufacturing costs and no secondary pollution.

[0041] Specifically, the height direction of cabinet 1 is as follows: Figure 1 As indicated by arrow H in the diagram. In the height direction of the cabinet 1, the height of the liquid inlet 1071 of the overflow port 107 is approximately 3mm to 10mm higher than the height of the oil outlet 105. For example, the height of the liquid inlet 1071 of the overflow port 107 above the height of the oil outlet 105 can be 3mm, 5mm, 10mm, etc. Additionally, the neutralizing agent inlet 106 is used to introduce neutralizing agent into the neutralization zone 102; the neutralizing agent can be an alkaline solution.

[0042] It should be noted that, in this embodiment of the present invention, the height of the oil drain port 105 can be set according to the actual liquid level of the grease being processed and the liquid level of the waste liquid, so that the oil drain port 105 is located at the oil layer position of the oil separation zone 101, and the height of the liquid inlet end 1071 of the overflow port 107 can be set accordingly.

[0043] In one embodiment, such as Figure 1 As shown, the overflow port 107 is connected to a drain pipe 3 located inside the neutralization zone 102. The drain pipe 3 can be a curved pipe. In the height direction of the cabinet 1, the height of the inlet end 1071 of the drain pipe 3 is higher than the height of the oil outlet 105. Connecting the drain pipe 3 to the overflow port 107 allows the curved pipe to reduce the impact force of the waste liquid at the inlet end 1071, reduce air bubbles, facilitate smooth discharge of waste liquid, and the installation position of the drain pipe 3 is more flexible, which is convenient for subsequent maintenance and management.

[0044] In one embodiment, such as Figure 1 As shown, the waste liquid inlet 104 and the oil outlet 105 are located on the side of the oil-separating zone 101 away from the partition 2. Positioning the waste liquid inlet 104 and the oil outlet 105 on the side of the oil-separating zone 101 away from the partition 2 ensures thorough preliminary separation of the waste liquid in the oil-separating zone 101, further improving the grease removal effect and preventing the waste liquid from directly entering the neutralization zone 102 from the drain channel 103.

[0045] Of course, in other embodiments, the waste liquid inlet 104 and the oil outlet 105 can also be installed in other positions in the oil separation zone 101 as needed. This embodiment of the present invention does not impose too many restrictions on this.

[0046] In one embodiment, such as Figure 1 As shown, the neutralizing agent inlet 106 and overflow outlet 107 are located on the side of the neutralization zone 102 away from the partition 2. Positioning the neutralizing agent inlet 106 and overflow outlet 107 on the side of the neutralization zone 102 away from the partition 2 ensures that the neutralizing agent is evenly distributed in the neutralization zone 102 for saponification, further improving the grease removal effect and preventing the neutralizing agent from entering the oil-separating zone 101 through the drain channel 103.

[0047] Similarly, in some other embodiments, the neutralizer inlet 106 and the overflow outlet 107 may also be selectively installed at other locations in the neutralization zone 102 as needed.

[0048] In one embodiment, such as Figure 1 As shown, a stirrer 4 is also provided in the neutralization zone 102. The stirrer 4 is vertically arranged and passes through the top wall of the neutralization zone 102. The stirrer 4 enables the neutralizing agent and waste liquid in the neutralization zone 102 to flow evenly and mix thoroughly, thereby increasing the rate of saponification reaction and further improving the grease removal effect. The vertical arrangement of the stirrer 4 and its passage through the top wall of the neutralization zone 102 facilitates maintenance and replacement.

[0049] It should be noted that the present invention does not limit the structure of the stirrer 4, and any existing stirrer can be selected as needed, such as a paddle stirrer, a turbine stirrer, and a spiral stirrer.

[0050] In one embodiment, such as Figure 1 As shown, a pH meter 5 is also installed in the neutralization zone 102. The pH meter 5 is used to detect the pH value of the waste liquid in the neutralization zone 102 in real time, and adjust the amount of neutralizing agent added according to the pH value, thereby ensuring the stable progress of the saponification reaction and improving the oil removal effect. In addition, it can also ensure that the pH value of the waste liquid in the neutralization zone 102 is within a certain range, such as the pH value of about 8 to 9, so as to meet the discharge standards for waste liquid pH value.

[0051] Furthermore, the waste liquid treatment device also includes a control system and a neutralizing agent addition system. The control system is electrically connected to the pH meter 5 and the neutralizing agent addition system. The neutralizing agent addition system is used to add neutralizing agent to the neutralization zone 102 through the neutralizing agent inlet 106. The control system automatically adjusts the amount of neutralizing agent added based on the pH value detected by the pH meter 5. For example, when the pH value exceeds 9, the amount of neutralizing agent added is reduced; when the pH value is below 8, the amount of neutralizing agent added is increased, thereby maintaining the pH value of the waste liquid in the neutralization zone 102 within a suitable range.

[0052] In one embodiment, such as Figure 1 As shown, the top of the oil-separating zone 101 and the neutralizing zone 102 are also provided with exhaust ports 108. The gas generated during the waste liquid treatment process is discharged through the exhaust ports 108 at the top of the oil-separating zone 101 and the neutralizing zone 102 to prevent waste gas from accumulating in the cabinet 1 and affecting the waste liquid treatment.

[0053] In one embodiment, such as Figure 1 As shown, a liquid outlet 109 is also provided at the bottom of the side wall of the neutralization zone 102, located below the overflow outlet 107. The liquid outlet 109 allows for the complete discharge of waste liquid from the cabinet 1, facilitating maintenance of the cabinet 1. During waste liquid treatment, the liquid outlet 109 remains closed to prevent the discharge of untreated grease.

[0054] It should be noted that this embodiment of the invention does not limit the connection method between the partition 2 and the cabinet 1. It can be a snap-fit ​​fixing structure, such as the partition 2 and the cabinet 1 being connected by snap-fit ​​fasteners, facilitating quick installation and disassembly. Alternatively, it can be a fastener-type fixing structure, such as the partition 2 and the cabinet 1 being fixed by bolts, ensuring a secure connection. Furthermore, the form of the drainage channel 103 is not limited; any existing structure can be selected as needed. For example, a through hole can be opened at the bottom of the partition 2 to form the drainage channel 103, simplifying the manufacturing process.

[0055] In one embodiment, the top of the partition 2 is connected to the top wall inside the cabinet 1, and a gap is left between the bottom of the partition 2 and the bottom wall of the cabinet 1 to form a drainage channel 103. Connecting the top of the partition 2 to the top wall inside the cabinet 1 and leaving a gap between the bottom of the partition 2 and the bottom wall of the cabinet 1 to form a drainage channel 103 facilitates the installation and removal of the partition 2, eliminates the need for additional processing of the drainage channel 103, and helps reduce manufacturing costs.

[0056] To achieve the basic functions of the waste liquid treatment device, the waste liquid treatment device in this embodiment may also include other necessary modules or components, such as seals and fasteners. It should be noted that the other necessary modules or components included in the waste liquid treatment device can be any suitable existing structure. To clearly and concisely illustrate the technical solution provided in this embodiment, the above-mentioned parts will not be repeated here, and the accompanying drawings have also been simplified accordingly. However, it should be understood that the scope of this utility model is not limited thereto.

[0057] According to an embodiment of the present invention, another aspect provides a marine engine, comprising: an exhaust gas recirculation system and a waste liquid treatment device. The exhaust gas recirculation system is provided with a drain port. The drain port of the exhaust gas recirculation system is connected to the waste liquid inlet 104 of the waste liquid treatment device.

[0058] Because the marine engine includes a waste liquid treatment device, which has the same effect as the waste liquid treatment device, that is, the cabinet 1 is divided into an oil separation zone 101 and a neutralization zone 102 by the partition 2. The EGR system discharges oil-water mixed waste liquid into the oil separation zone 101 through the waste liquid inlet 104. In the oil separation zone 101, the oil and grease are suspended on the surface of the waste liquid due to the density difference between oil and water, and discharged from the oil outlet 105 above, realizing the initial separation of oil and water. After that, the waste liquid after initial separation enters the neutralization zone 102 through the drain channel 103 at the bottom of the partition 2. In the neutralization zone 102, a neutralizing agent is introduced to react with the grease in the waste liquid to undergo a saponification reaction, further removing the grease. Finally, the waste liquid is discharged from the overflow outlet 107. Therefore, this utility model embodiment can effectively remove grease from the waste liquid of the EGR system, improve the stability of the marine engine, and avoid grease from contaminating the EGR system and affecting the use of the marine engine.

[0059] Furthermore, the height of the liquid inlet 1071 of the overflow port 107 is higher than the height of the oil outlet 105, which ensures that wastewater is discharged from the overflow port 107 and suspended grease is discharged from the oil outlet 105, thus preventing the wastewater from being discharged from the oil outlet 105 before the water level reaches the liquid inlet 1071 of the overflow port 107.

[0060] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A waste liquid treatment device characterized by comprising: The application relates to a waste liquid treatment device. The waste liquid treatment device comprises a cabinet (1) which is internally divided into an oil separation area (101) and a neutralization area (102) by a partition (2), the bottom of the partition (2) is provided with a liquid discharge channel (103) which communicates the oil separation area (101) and the neutralization area (102); the side wall of the oil separation area (101) is respectively provided with a waste liquid inlet (104) and an oil discharge port (105), the oil discharge port (105) is installed above the waste liquid inlet (104) and is located at the oil layer position of the oil separation area (101); the neutralization area (102) is provided with a neutralizing agent feeding port (106) and an overflow port (107), in the height direction of the cabinet (1), the liquid inlet end (1071) of the overflow port (107) is higher than the height of the oil discharge port (105). The overflow port (107) is connected with a liquid discharge pipe (3) which is located inside the neutralization area (102), in the height direction of the cabinet (1), the liquid inlet end (1071) of the liquid discharge pipe (3) is higher than the height of the oil discharge port (105). The waste liquid inlet (104) and the oil discharge port (105) are arranged on the side of the oil separation area (101) which is away from the partition (2).

2. The waste liquid processing apparatus according to claim 1, wherein The neutralizing agent feeding port (106) and the overflow port (107) are arranged on the side of the neutralization area (102) which is away from the partition (2).

3. The waste liquid processing device according to claim 1, wherein The neutralization area (102) is further provided with a stirrer (4), the stirrer (4) is vertically arranged and penetrates the top wall of the neutralization area (102).

4. The waste liquid processing device according to claim 1, wherein The neutralization area (102) is further provided with a pH meter (5).

5. The waste liquid treatment device according to any one of claims 1 to 4, characterized by, The top of the oil separation area (101) and the top of the neutralization area (102) are further respectively provided with an exhaust port (108).

6. The waste liquid treatment device according to any one of claims 1 to 4, wherein The side wall bottom of the neutralization area (102) is further provided with a liquid outlet (109), the liquid outlet (109) is located below the overflow port (107).

7. The waste liquid treatment device according to any one of claims 1 to 4, wherein The top of the partition (2) is connected with the top wall in the cabinet (1), a gap is left between the bottom of the partition (2) and the bottom wall of the cabinet (1) to form the liquid discharge channel (103).

8. The waste liquid treatment device according to any one of claims 1 to 4, wherein The application further relates to a waste gas recirculation system which is provided with a liquid discharge port.

9. The waste liquid treatment device according to any one of claims 1 to 4, wherein The waste liquid treatment device according to any one of claims 1 to 9, the liquid discharge port is connected with the waste liquid inlet (104).

10. A marine engine, characterized by ​ ​ ​

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