Neutralizing buffer tank and marine engine

Abstract

The utility model relates to waste liquid treatment technical field discloses neutralization buffer cabinet and marine engine, wherein the neutralization buffer cabinet, including: cabinet, the inside of cabinet is divided into first oil removal area and second oil removal area by partition, and the bottom of partition is equipped with the communicating port of intercommunication of first oil removal area and second oil removal area, first oil removal area interval is equipped with waste liquid inlet and oil outlet, and the oil outlet is installed in the upper of waste liquid inlet and is located the oil layer position of first oil removal area, and the bottom of first oil removal area is equipped with first aeration disc, second oil removal area interval is equipped with lye inlet and overflow port, and the bottom of second oil removal area is equipped with second aeration disc, the utility model discloses utilize the difference of oil -water density in first oil removal area, and the oil and oil residue that float up are discharged through oil outlet, realize oil liquid preliminary separation, in second oil removal area, and the oil grease in waste liquid happens saponification reaction by the lye that is passed in, further remove the oil grease in waste liquid, and the oil grease removal effect is better.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, specifically to a neutralization buffer tank and a marine engine. Background Technology

[0002] To reduce harmful gases emitted by marine 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 marine 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 neutralization buffer tank 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 neutralization buffer cabinet, comprising:

[0007] The cabinet is internally divided into a first degreasing area and a second degreasing area by a partition. The bottom of the partition is provided with a connecting port that connects the first degreasing area and the second degreasing area.

[0008] The first oil removal zone is provided with a waste liquid inlet and an oil outlet. The oil outlet is installed above the waste liquid inlet and located at the oil layer position of the first oil removal zone. The bottom of the first oil removal zone is provided with a first aeration plate.

[0009] The second oil removal zone is provided with an alkaline inlet and an overflow outlet, and a second aeration disc is provided at the bottom of the second oil removal zone.

[0010] Beneficial Effects: The neutralization buffer cabinet of this invention divides the cabinet into a first oil removal zone and a second oil removal zone via a partition. Oil-water mixed waste liquid is discharged into the first oil removal zone through the waste liquid inlet. In the first oil removal 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 upper oil outlet, achieving initial oil separation. Afterward, the initially separated waste liquid enters the second oil removal zone through the connecting port at the bottom of the partition. In the second oil removal zone, an alkaline solution 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. Therefore, this invention can effectively remove grease from waste liquid and improve the operational stability of marine engines. Furthermore, a first aeration disc is installed at the bottom of the first degreasing zone, which can quickly blow light grease and oil residue in the waste liquid to the top and discharge it from the oil outlet, thereby improving the discharge effect of grease and oil residue. A second aeration disc is installed at the bottom of the second degreasing zone, which can stir the alkali solution added by the alkali solution inlet and the waste liquid in the second degreasing zone, so that the two are fully mixed, thereby increasing the rate of saponification reaction and further improving the grease removal effect.

[0011] In one alternative embodiment, the system further includes a blower connected to both the first aeration disc and the second aeration disc.

[0012] Beneficial effects: The blower draws in outside air and compresses it to form a high-pressure airflow. The high-pressure airflow is then transported through the air pipe to the micropores of the first and second aeration discs for release, forming a large number of fine bubbles and high-flow aeration. In the first oil removal zone, the bubbles can carry the less dense grease and oil residue to the top, facilitating the rapid discharge of grease and oil residue. In the second oil removal zone, the bubbles can promote the agitation of alkaline solution and waste liquid, thereby achieving thorough mixing.

[0013] In one optional embodiment, the system further includes an airflow detector and an alarm. The airflow detector is located at the air outlet of the fan and is used to detect the airflow of the fan. The alarm is electrically connected to the airflow detector and is used to sound an alarm when the airflow detected by the airflow detector is lower than a preset airflow.

[0014] Beneficial effects: The air volume detector can detect the air volume of the blower and upload it to the alarm. When the blower malfunctions or the first and second aeration discs become blocked, the air volume of the blower will be significantly reduced. Therefore, when the air volume is lower than the preset air volume, the alarm will sound to remind maintenance personnel to perform timely maintenance and ensure the grease removal effect.

[0015] In one optional embodiment, the system further includes an alkali tank and a switching pump. The alkali tank stores alkali and has an alkali outlet. The alkali outlet is connected to the alkali inlet via an alkali pipeline, and the switching pump is located on the alkali pipeline.

[0016] Beneficial effects: The alkali tank is used to supply alkali solution. The alkali solution stored in the tank is added to the second degreasing zone of the cabinet through the switch pump and alkali solution pipeline. The alkali solution reacts with the grease in the waste liquid in the second degreasing zone to achieve further grease removal.

[0017] In one optional embodiment, an acid-base meter is further provided in the second degreasing zone, and the acid-base meter is electrically connected to the switch pump.

[0018] Beneficial effects: The acid-base meter is used to detect the acid-base value of the waste liquid in the second degreasing zone in real time. Based on the acid-base value, the opening degree of the switch pump is controlled to adjust the amount of alkali added, thereby ensuring the stable progress of the saponification reaction and improving the oil removal effect.

[0019] In one optional embodiment, a liquid outlet is provided at the bottom of the side wall of the second degreasing zone, the liquid outlet being located below the overflow port, and the probe of the acid-base meter being located on the cabinet near the liquid outlet.

[0020] Beneficial effects: The waste liquid inside the cabinet can be completely discharged through the outlet, facilitating cabinet maintenance. During waste liquid treatment, the outlet remains closed to prevent the discharge of untreated grease. Placing the pH meter probe near the outlet within the cabinet also ensures that the pH value of the waste liquid in the second degreasing zone is maintained within a certain range, meeting the discharge standards and thus protecting the environment.

[0021] In one optional embodiment, the top of the alkali tank is provided with an alkali filling port and a clean water filling port spaced apart.

[0022] Beneficial effects: The alkali inlet is used to add new alkali to the alkali tank, and the water inlet is used to add water to the alkali tank, thereby adjusting the pH value of the alkali output from the alkali tank and achieving a continuous supply of alkali to meet the saponification reaction requirements of the second degreasing zone.

[0023] In one optional embodiment, the top of the first degreasing zone and the second degreasing zone are respectively provided with exhaust pipes.

[0024] Beneficial effects: The gas generated during the waste liquid treatment process is discharged through the exhaust pipes at the top of the first and second oil removal zones, preventing waste gas from accumulating inside the cabinet and affecting waste liquid treatment.

[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 communication opening.

[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 connecting opening, which facilitates the installation and removal of the partition without the need for additional processing of the connecting opening, which helps to reduce manufacturing costs and also prevents light grease and oil residue from entering the second degreasing zone from the top.

[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 neutralization buffer tank, the drain outlet is connected to the waste liquid inlet.

[0030] Beneficial effects: Because marine engines include a neutralization buffer tank, this system has the same effect as a neutralization buffer tank, namely, dividing the tank into a first oil removal zone and a second oil removal zone by a partition. The exhaust gas recirculation (EGR) system discharges oil-water mixed waste liquid into the first oil removal zone through the waste liquid inlet. In the first oil removal 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 upper oil outlet, achieving preliminary separation of oil and water. Afterward, the preliminarily separated waste liquid enters the second oil removal zone through the connecting port at the bottom of the partition. In the second oil removal zone, alkaline solution 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 port. Therefore, this invention can effectively remove grease from the waste liquid of the EGR system, improve the operational stability of marine engines, and prevent grease from contaminating the EGR system and affecting the operation of marine engines. Furthermore, a first aeration disc is installed at the bottom of the first degreasing zone, which can quickly blow light grease and oil residue in the waste liquid to the top and discharge it from the oil outlet, thereby improving the discharge effect of grease and oil residue. A second aeration disc is installed at the bottom of the second degreasing zone, which can stir the alkali solution added by the alkali solution inlet and the waste liquid in the second degreasing zone, so that the two are fully mixed, thereby increasing the rate of saponification reaction and further improving the grease removal effect. 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 neutralization buffer cabinet according to an embodiment of the present utility model.

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

[0034] 1. Cabinet; 101. First oil removal zone; 102. Second oil removal zone; 103. Connecting port; 104. Waste liquid inlet; 105. Oil drain port; 106. Alkali inlet; 107. Overflow port; 108. Exhaust pipe; 109. Liquid outlet; 2. Partition; 3. First aeration plate; 4. Second aeration plate; 5. Blower; 6. Alkali tank; 601. Alkali filling port; 602. Clean water filling port; 7. Switch pump; 8. Alkali pipeline; 9. 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 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 neutralization buffer cabinet is provided, including: a cabinet body 1. The interior of the cabinet body 1 is divided into a first oil removal zone 101 and a second oil removal zone 102 by a partition 2. The bottom of the partition 2 is provided with a connecting port 103 connecting the first oil removal zone 101 and the second oil removal zone 102. The first oil removal zone 101 is provided with a waste liquid inlet 104 and an oil outlet 105 at intervals. The oil outlet 105 is installed above the waste liquid inlet 104 and located at the oil layer position of the first oil removal zone 101. The bottom of the first oil removal zone 101 is provided with a first aeration plate 3. The second oil removal zone 102 is provided with an alkali inlet 106 and an overflow port 107 at intervals. The bottom of the second oil removal zone 102 is provided with a second aeration plate 4.

[0038] Therefore, the neutralization buffer cabinet provided in this embodiment of the invention divides the cabinet 1 into a first oil removal zone 101 and a second oil removal zone 102 by a partition 2. Waste liquid containing oil is discharged into the first oil removal zone 101 through the waste liquid inlet 104. In the first oil removal zone 101, due to the density difference between oil and water, light grease and light particulate matter are suspended on the surface of the waste liquid and discharged from the upper oil outlet 105, achieving preliminary oil separation. Afterward, the preliminarily separated waste liquid enters the second oil removal zone 102 through the connecting port 103 at the bottom of the partition 2. In the second oil removal zone 102, an alkaline solution 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 port 107. Therefore, this invention can effectively remove grease from waste liquid and improve the operational stability of marine engines.

[0039] Furthermore, a first aeration disc 3 is installed at the bottom of the first oil removal zone 101, which can quickly blow light grease and oil residue in the waste liquid to the top and discharge it from the oil outlet 105, improving the discharge effect of grease and oil residue. A second aeration disc 4 is installed at the bottom of the second oil removal zone 102, which can stir the alkali solution added by the alkali solution inlet 106 and the waste liquid in the second oil removal zone 102, so that the two are fully mixed, increasing the rate of saponification reaction and further improving the grease removal effect.

[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 chemical agents can easily cause secondary pollution to the environment. The neutralization buffer tank provided in this embodiment of the invention removes grease in two stages through a first oil removal zone 101 and a second oil removal zone 102, significantly improving the grease removal efficiency and avoiding the problem of waste grease clogging. The neutralization buffer tank 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, an alkaline solution is a solution containing a large number of hydroxide ions and thus exhibiting alkalinity, such as a sodium hydroxide solution.

[0042] It should be noted that this embodiment of the invention does not limit the structure of the first aeration disc 3 and the second aeration disc 4; any existing structure can be selected as needed. For example, the first aeration disc 3 and the second aeration disc 4 are each provided with multiple micropores of different sizes. By introducing gas into the first aeration disc 3 and the second aeration disc 4, the gas forms fine bubbles and high-flow-rate aeration after passing through the micropores. The first aeration disc 3 and the second aeration disc 4 are also each provided with a bracket fixed to the bottom of the cabinet 1.

[0043] In one embodiment, such as Figure 1 As shown, the neutralization buffer tank also includes a blower 5, which is connected to the first aeration disc 3 and the second aeration disc 4 via air pipes. The blower 5 draws in outside air and compresses it to form a high-pressure airflow. This high-pressure airflow is then transported through the air pipes to the micropores of the first and second aeration discs 3 and released, forming a large number of fine bubbles and high-flow-rate aeration. In the first oil removal zone 101, the bubbles can carry the less dense grease and oil residue to the top, facilitating rapid discharge of the grease and oil residue. In the second oil removal zone 102, the bubbles can promote the agitation of the alkaline solution and waste liquid, thereby achieving thorough mixing.

[0044] Furthermore, in one embodiment, the air pipe includes a first branch pipe and a second branch pipe connected to each other. The first branch pipe is connected to the first aeration disc 3, and the second branch pipe is connected to the second aeration disc 4. Control valves are respectively provided on the first branch pipe and the second branch pipe. The aeration volume of the first aeration disc 3 and the second aeration disc 4 can be controlled by the control valves to adjust the driving ability of the first aeration disc 3 on the grease and light particles in the first oil removal zone 101, and the stirring ability of the second aeration disc 4 on the second oil removal zone 102.

[0045] Furthermore, in one embodiment, the neutralization buffer cabinet also includes an airflow detector and an alarm. The airflow detector is located at the air outlet of the fan 5 and is used to detect the airflow of the fan 5. The alarm is electrically connected to the airflow detector and is used to sound an alarm when the airflow detected by the airflow detector is lower than a preset airflow. The airflow detector can detect the airflow of the fan 5 and upload the data to the alarm. When the fan 5 malfunctions, or when the first aeration disc 3 or the second aeration disc 4 becomes blocked, the airflow of the fan 5 will decrease significantly. Therefore, when the airflow is lower than the preset airflow, the alarm will sound to remind maintenance personnel to perform timely maintenance and ensure the grease removal effect.

[0046] It should be noted that both the air volume detector and the alarm can be selected from any existing structure as needed, for example, the air volume detector can be a flow meter and the alarm can be a buzzer.

[0047] In one embodiment, such as Figure 1 As shown, the neutralization buffer cabinet also includes an alkali tank 6 and a switching pump 7. The alkali tank 6 stores alkali solution and has an alkali solution outlet, which is connected to the alkali solution inlet 106 via an alkali solution pipeline 8. The switching pump 7 is located on the alkali solution pipeline 8. The alkali tank 6 is used to supply alkali solution. The alkali solution stored in the alkali tank 6 is added to the second degreasing zone 102 of the cabinet 1 via the switching pump 7 and the alkali solution pipeline 8, and undergoes a saponification reaction with the grease in the waste liquid in the second degreasing zone 102 to further remove grease.

[0048] Furthermore, in one embodiment, such as Figure 1 As shown, the second degreasing zone 102 is also equipped with an acid-base meter 9 (pH meter), which is electrically connected to the switching pump 7. The acid-base meter 9 is used to detect the acid-base value of the waste liquid in the second degreasing zone 102 in real time, and controls the opening of the switching pump 7 according to the acid-base value to adjust the amount of alkali added, thereby ensuring the stable progress of the saponification reaction and improving the oil removal effect.

[0049] For example, when the pH value of the waste liquid detected by the acid-base meter 9 exceeds 9, the opening of the switch pump 7 is reduced, thereby reducing the amount of alkali added. When the pH value of the waste liquid detected by the acid-base meter 9 is lower than 8, the opening of the switch pump 7 is increased, thereby increasing the amount of alkali added, so as to maintain the pH value of the waste liquid in the second oil removal zone 102 within a suitable range.

[0050] In one embodiment, such as Figure 1 As shown, the bottom side wall of the second oil removal zone 102 is also provided with a liquid outlet 109, which is located below the overflow outlet 107. The probe of the acid-base meter 9 is located on the cabinet 1 near the liquid outlet 109. The waste liquid in the cabinet 1 can be completely discharged through the liquid outlet 109 for maintenance of the cabinet 1. During the waste liquid treatment process, the liquid outlet 109 remains closed to prevent the discharge of untreated grease waste liquid. Placing the probe of the acid-base meter 9 on the cabinet 1 near the liquid outlet 109 also ensures that the pH value of the waste liquid in the second oil removal zone 102 is maintained within a certain range before discharge, for example, the pH value is around 8 to 9, meeting the discharge standards for waste liquid pH value, thereby protecting the environment.

[0051] In one embodiment, such as Figure 1 As shown, the top of the alkali tank 6 is provided with an alkali inlet 601 and a water inlet 602 at intervals. The alkali inlet 601 is used to add new alkali to the alkali tank 6, and the water inlet 602 is used to add water to the alkali tank 6. This allows for adjustment of the pH value of the alkali output from the alkali tank 6 and ensures a continuous supply of alkali to meet the saponification reaction requirements of the second degreasing zone 102.

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

[0053] 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 snapped together, 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 together with bolts, ensuring a secure connection. Furthermore, the form of the connecting opening 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 connecting opening 103, simplifying the manufacturing process.

[0054] In one embodiment, such as Figure 1 As shown, the top of partition 2 is connected to the top wall inside cabinet 1, and a gap is left between the bottom of partition 2 and the bottom wall of cabinet 1 to form a communication opening 103. Connecting the top of partition 2 to the top wall inside cabinet 1 and leaving a gap between the bottom of partition 2 and the bottom wall of cabinet 1 to form a communication opening 103 facilitates the installation and removal of partition 2 without the need for additional processing of the communication opening 103, which helps reduce manufacturing costs and also prevents light grease and oil residue from entering the second degreasing zone 102 from the top.

[0055] In one embodiment, the height of the overflow port 107 is higher than the height of the oil drain port 105, which ensures that wastewater is discharged from the overflow port 107 and suspended grease is discharged from the oil drain port 105, thus preventing the wastewater from being discharged from the oil drain port 105 before the water level reaches the liquid inlet 1071 of the overflow port 107.

[0056] 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 first oil removal zone 101 away from the partition 2. Positioning the waste liquid inlet 104 and the oil outlet 105 on the side of the first oil removal zone 101 away from the partition 2 allows for thorough preliminary separation of the waste liquid in the first oil removal zone 101, further improving the grease removal effect and preventing the waste liquid from directly entering the second oil removal zone 102 from the connecting port 103.

[0057] Of course, in some other embodiments, the waste liquid inlet 104 and the oil outlet 105 can also be installed in other positions in the first oil removal zone 101 as needed. This embodiment of the present invention does not impose too many restrictions on this.

[0058] In one embodiment, such as Figure 1 As shown, the overflow port 107 is located on the side of the second degreasing zone 102 away from the partition 2, and the alkali inlet 106 is located at the top of the second degreasing zone 102 so that the alkali is evenly distributed in the second degreasing zone 102 for saponification reaction, further improving the grease removal effect and preventing the alkali from entering the first degreasing zone 101 from the connecting port 103.

[0059] Similarly, in some other embodiments, the alkali inlet 106 and the overflow port 107 can also be installed at other locations in the second degreasing zone 102 as needed.

[0060] To achieve the basic functions of the neutralization buffer cabinet, the neutralization buffer cabinet in this embodiment may also include other necessary modules or components, such as seals and fasteners. It should be noted that any suitable existing structure can be selected from the other necessary modules or components included in the neutralization buffer cabinet. 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.

[0061] According to an embodiment of the present invention, another aspect provides a marine engine, comprising: an exhaust gas recirculation system and a neutralization buffer tank. 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 neutralization buffer tank.

[0062] Because the marine engine includes a neutralization buffer tank, which has the same effect as the neutralization buffer tank, that is, the tank body 1 is divided into a first oil removal zone 101 and a second oil removal zone 102 by the partition 2, the exhaust gas recirculation (EGR) system discharges oil-water mixed waste liquid into the first oil removal zone 101 through the waste liquid inlet 104. In the first oil removal 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 upper oil outlet 105, realizing the initial separation of oil and water. After that, the initially separated waste liquid enters the second oil removal zone 102 through the connecting port 103 at the bottom of the partition 2. In the second oil removal zone 102, alkaline solution 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 port 107. Therefore, this utility model can effectively remove grease from the waste liquid of the EGR system, improve the stability of marine engine use, and avoid grease from contaminating the EGR system and affecting the use of marine engine.

[0063] Furthermore, a first aeration disc 3 is provided at the bottom of the first degreasing zone 101, which can quickly blow light grease and oil residue in the waste liquid to the top and discharge it from the oil outlet 105, thereby improving the discharge effect of grease and oil residue. A second aeration disc 4 is provided at the bottom of the second degreasing zone 102, which can stir the alkali solution added by the alkali solution inlet 106 and the waste liquid in the second degreasing zone 102, so that the two are fully mixed, thereby increasing the rate of saponification reaction and further improving the grease removal effect.

[0064] 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 neutralization buffer cabinet, characterized in that, include: The cabinet (1) is divided into a first degreasing zone (101) and a second degreasing zone (102) by a partition (2). The bottom of the partition (2) is provided with a communication port (103) connecting the first degreasing zone (101) and the second degreasing zone (102). The first oil removal zone (101) is provided with a waste liquid inlet (104) and an oil outlet (105) at intervals. The oil outlet (105) is installed above the waste liquid inlet (104) and located at the oil layer position of the first oil removal zone (101). The bottom of the first oil removal zone (101) is provided with a first aeration plate (3). The second oil removal zone (102) is provided with an alkaline inlet (106) and an overflow outlet (107) at intervals, and a second aeration disc (4) is provided at the bottom of the second oil removal zone (102).

2. The neutralization buffer cabinet according to claim 1, characterized in that, It also includes a blower (5), which is connected to the first aeration disc (3) and the second aeration disc (4) respectively.

3. The neutralization buffer cabinet according to claim 2, characterized in that, It also includes an air volume detector and an alarm. The air volume detector is located at the air outlet of the fan (5) and is used to detect the air volume of the fan (5). The alarm is electrically connected to the air volume detector and is used to sound an alarm when the air volume detected by the air volume detector is lower than the preset air volume.

4. The neutralization buffer cabinet according to claim 1, characterized in that, It also includes an alkali tank (6) and a switch pump (7). The alkali tank (6) stores alkali and has an alkali outlet. The alkali outlet is connected to the alkali inlet (106) through an alkali pipeline (8). The switch pump (7) is located on the alkali pipeline (8).

5. The neutralization buffer cabinet according to claim 4, characterized in that, The second degreasing zone (102) is also equipped with an acid-base meter (9), which is electrically connected to the switch pump (7).

6. The neutralization buffer cabinet according to claim 5, characterized in that, The bottom of the side wall of the second degreasing zone (102) is also provided with a liquid outlet (109), which is located below the overflow port (107). The probe of the acid-base meter (9) is located on the cabinet (1) near the liquid outlet (109).

7. The neutralization buffer cabinet according to claim 4, characterized in that, The top of the alkali tank (6) is provided with an alkali filling port (601) and a clean water filling port (602) spaced apart.

8. The neutralization buffer cabinet according to any one of claims 1 to 7, characterized in that, The top of the first degreasing zone (101) and the second degreasing zone (102) are also provided with exhaust pipes (108).

9. The neutralization buffer cabinet according to any one of claims 1 to 7, characterized in that, 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 the communication opening (103).

10. A marine engine, characterized in that, include: The exhaust gas recirculation system is equipped with a drain outlet; The neutralization buffer cabinet according to any one of claims 1 to 9, wherein the drain outlet is connected to the waste liquid inlet (104).

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