Ship domestic sewage treatment system

Abstract

The utility model relates to a ship domestic sewage treatment system, which comprises a domestic sewage cabin, a domestic sewage treatment device, a recycled water temporary storage cabinet, an electrolytic filtering device and a reclaimed water cabin, and is characterized in that sewage is not only pretreated by the domestic sewage cabin, but is treated by the domestic sewage treatment device after pretreatment; after the sewage is treated, the turbidity and the chromaticity of the sewage are detected by the reuse water temporary storage cabinet, if the turbidity of the sewage is not qualified, the sewage is sent back to the sewage cabin again, if the chromaticity of the sewage is not qualified, the sewage is treated by the electrolytic filtering device and then returns to the reclaimed water cabin, and if the turbidity and the chromaticity of the sewage are both qualified, the sewage directly returns to the reclaimed water cabin. The domestic sewage treatment capacity of the ship is improved, water in the reclaimed water tank can be supplied to a toilet water supply system in a living quarter in the ship docking and sailing period, effective recycling and reutilization of water resources in sewage are achieved, and waste of the water resources is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment technology, and in particular relates to a shipboard sewage treatment system. Background Technology

[0002] With the rapid development of the global shipping industry and the increasing emphasis on environmental protection in various countries and regions, the problem of sewage generated by ships during navigation has become increasingly prominent. According to the requirements of GB 3552-2018, the standard for the control of water pollutant discharge from ships, sewage from ships must not be directly discharged. It can only be discharged during navigation after treatment to meet standards, or collected and discharged into receiving facilities. For some special vessels, frequently docking at wharves to discharge sewage into port receiving facilities would significantly increase their operating costs.

[0003] Furthermore, existing treatment methods often neglect the recycling of water resources. Freshwater resources are extremely precious when ships are sailing at sea, but traditional wastewater treatment methods fail to effectively recover and reuse water resources from wastewater, leading to water waste. In today's increasingly water-scarce world, this treatment method is clearly not in line with the requirements of sustainable development.

[0004] In conclusion, if the ship's ability to treat domestic sewage can be improved and the treated sewage can be recycled, the above problems can be perfectly solved. Utility Model Content

[0005] Based on this, and in response to the aforementioned technical problems, a shipboard sewage treatment system is provided.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A shipboard sewage treatment system, characterized in that it comprises a sewage tank for collecting, storing, and pre-treating sewage; a first water supply pipeline; a sewage treatment device for biochemical treatment of sewage; a second water supply pipeline; a reclaimed water buffer tank for detecting the turbidity and color of sewage treated by the sewage treatment device; a first return water pipeline for returning sewage with unacceptable turbidity; a second return water pipeline for returning sewage with unacceptable color; a third return water pipeline for returning sewage with acceptable turbidity and color; an electrolytic filtration device; and a greywater tank. The inlet of the sewage tank is connected to the main sewage pipe, and the outlet of the sewage tank is connected to the first water supply pipeline. A water supply pipeline is connected to the inlet of the domestic sewage treatment device. The outlet of the domestic sewage treatment device is connected to the inlet of the recycled water buffer tank via a second water supply pipeline. The outlet of the recycled water buffer tank is connected to the first, second, and third return water pipelines. Control valves are respectively installed at the connection points of the outlet with the first, second, and third return water pipelines. The first return water pipeline is connected to the main sewage pipe. The second return water pipeline is connected to the return water inlet of the greywater tank via the electrolytic filtration device. The third return water pipeline is connected to the return water inlet of the greywater tank. The outlet of the greywater tank is connected to the pressure water tank via a water supply pipeline.

[0008] The structure of this invention allows for more than just pre-treatment of sewage in the sewage tank; it further treats the sewage through a sewage treatment device after pre-treatment. After treatment, the turbidity and color of the sewage are tested in a recycled water buffer tank. If the turbidity is substandard, the sewage is returned to the sewage tank; if the color is substandard, it is treated by an electrolytic filtration device before being returned to the medium-water tank. If both turbidity and color are within acceptable limits, the sewage is directly returned to the medium-water tank. This improves the ship's sewage treatment capacity. Furthermore, the water in the medium-water tank can supply the toilet water supply system in the living quarters during docking and navigation, achieving effective recovery and reuse of water resources from sewage and avoiding water waste. Attached Figure Description

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0010] Figure 1 This is a schematic diagram of a shipboard sewage treatment system provided for an embodiment of the present utility model. Detailed Implementation

[0011] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of this utility model. The following corresponding embodiments are only for clearly illustrating the utility model content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the described embodiments. Any obvious variations or modifications that fall within the technical concept and utility model content of this utility model are also within the protection scope of this utility model.

[0012] like Figure 1 As shown in the figure, this application provides a shipboard sewage treatment system, including a sewage tank 110, a greywater tank 120, a sewage treatment device 130, a recycled water buffer tank 140, an electrolytic filter device 150, and a flushing water pressure tank 160.

[0013] The domestic sewage tank 110 is used to collect, store and pre-treat domestic sewage. Its inlet is connected to the sewage main pipe 210, and its outlet is connected to the inlet of the domestic sewage treatment device 130 via the first water supply pipeline 220.

[0014] The outlet of the intermediate water tank 120 is connected to the flushing water pressure tank 160 via a water supply pipeline.

[0015] The domestic sewage treatment device 130 is used to perform biochemical treatment on domestic sewage. Specifically, it has a first aeration chamber, a second aeration chamber, and a decanting chamber for sequentially treating sewage. It should be noted that the domestic sewage treatment device 130 is an existing conventional domestic sewage treatment device, and its specific structure and working principle are not limited here.

[0016] The outlet of the domestic sewage treatment device 130 is connected to the inlet of the recycled water buffer tank 140 via the second water supply pipeline 230.

[0017] The recycled water buffer tank 140 is used to detect the turbidity and color of the sewage after it has been treated by the domestic sewage treatment device 130. Its outlet is divided into four lines via control valve V7 and transfer pump P3: first return water line 310, second return water line 320, third return water line 330 and drain line 340.

[0018] It should be noted that the method of detecting the turbidity and color of wastewater in the recycled water buffer tank 140 is a conventional technique and will not be specifically limited here.

[0019] The first return water pipe 310 is connected to the main sewage pipe 210, the second return water pipe 320 is connected to the return water inlet of the middle water tank 120 via the electrolytic filter device 150, and the third return water pipe 330 is connected to the return water inlet of the middle water tank 120.

[0020] like Figure 1 As shown, the working principle of the shipboard sewage treatment system in this application embodiment is as follows:

[0021] 1. Domestic sewage generated in the ship's living area enters the domestic sewage tank 110 for pretreatment (aeration) through the sewage main 210 and control valve V1.

[0022] 2. The pretreated sewage enters the domestic sewage treatment device 130 for biochemical treatment via control valves V2 and V3, transfer pump P1 and control valve V4 on the first water supply pipeline 220.

[0023] 3. After being treated by the domestic sewage treatment device 130, the sewage enters the recycled water buffer tank 140 through the control valve V5, transfer pump P2 and control valve V6 on the second water supply pipeline 230, and the turbidity and color of the sewage are detected.

[0024] 4. Based on the test results, the corresponding wastewater enters the respective compartments via control valve V7 and transfer pump P3:

[0025] 4.1 Wastewater with excessive turbidity: It is returned to the domestic sewage tank 110 through the control valve V8 on the first return water pipeline 310 and the control valve V1 on the sewage main pipeline 210 for re-treatment;

[0026] 4.2 Wastewater with excessive color: After being treated to meet the standards by the control valve V9 on the second return water pipeline 320, it flows into the electrolytic filter device 150 through the control valve V14 and then into the middle water tank 120.

[0027] 4.3 Wastewater with acceptable turbidity and color: Passing through control valve V10 on the third return water pipeline 330,

[0028] V14 flows directly into the intermediate water tank 120;

[0029] 4.4 Wastewater that passes inspection: During navigation, if the water level in the intermediate water tank 120 is too high, it can be discharged outside the ship through the control valve V11 / 12 / 13 on the drain pipe 340.

[0030] The wastewater that passes the above tests (both turbidity and color are within acceptable limits) refers to water that meets the discharge standards during navigation.

[0031] 5. The greywater in the greywater tank 120 can enter the flushing water pressure tank 160 through the control valve V15 on the water supply pipeline and be connected to the flushing system of the sanitary equipment in the living area.

[0032] In the above process, the controller performs routine on / off control of each control valve to achieve water flow.

[0033] As can be seen from the above, the ship sewage treatment system provided in this application embodiment, based on its structure, does not only pre-treat sewage in the sewage tank, but also treats the sewage through a sewage treatment device after pre-treatment. After treatment, the turbidity and color of the sewage are detected by the recycled water buffer tank. If the turbidity of the sewage is unqualified, it is sent back to the sewage tank. If the color of the sewage is unqualified, it is treated by an electrolytic filtration device and then returned to the medium water tank. If both the turbidity and color of the sewage are qualified, it is directly returned to the medium water tank. This improves the ship's sewage treatment capacity. In addition, the water in the medium water tank can also supply the toilet water supply system in the living area during the ship's docking and navigation, realizing the effective recovery and reuse of water resources in sewage and avoiding the waste of water resources.

[0034] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A shipboard sewage treatment system, characterized in that, The system includes a domestic sewage tank for collecting, storing, and pre-treating domestic sewage; a first water supply pipeline; a domestic sewage treatment device for biochemical treatment of domestic sewage; a second water supply pipeline; a reclaimed water buffer tank for detecting the turbidity and color of the sewage treated by the domestic sewage treatment device; a first return water pipeline for returning sewage that fails to meet turbidity standards; a second return water pipeline for returning sewage that fails to meet color standards; a third return water pipeline for returning sewage that meets both turbidity and color standards; an electrolytic filtration device; and a greywater tank. The inlet of the domestic sewage tank is connected to the main sewage pipe, and the outlet of the domestic sewage tank is connected to the main sewage pipe via the first water supply pipeline. The inlet of the domestic sewage treatment device is connected, and the outlet of the domestic sewage treatment device is connected to the inlet of the recycled water buffer tank via the second water supply pipeline. The outlet of the recycled water buffer tank is connected to the first return water pipeline, the second return water pipeline, and the third return water pipeline. Control valves are respectively installed at the connection points of the outlet with the first, second, and third return water pipelines. The first return water pipeline is connected to the main sewage pipe. The second return water pipeline is connected to the return water port of the greywater tank via the electrolytic filtration device. The third return water pipeline is connected to the return water port of the greywater tank. The outlet of the greywater tank is connected to the pressure water tank via the water supply pipeline.

2. The shipboard sewage treatment system according to claim 1, characterized in that, It also includes a drain pipe for discharging wastewater with acceptable turbidity and color, the drain pipe being connected to the outlet of the recycled water buffer tank, and a control valve being provided at the connection.

3. A shipboard sewage treatment system according to claim 1, characterized in that, The domestic sewage treatment device has a first aeration chamber, a second aeration chamber, and a decanting chamber for sequentially treating sewage.

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