Sewage treatment system for irregular cabin space utilization of large passenger ship

Abstract

The invention discloses a sewage treatment system for space utilization of irregular cabins of a large passenger ship, which is characterized in that irregular cabins of the large passenger ship are adopted as a black water pool, a grey water pool, an adjusting pool and a biochemical treatment pool, and aeration facilities capable of being adaptively adjusted are arranged in the black water pool, the grey water pool, the adjusting pool and the biochemical treatment pool; a water inlet of the oil skimmer is connected with a passenger ship kitchen grey water discharge pipeline, a water outlet of the oil skimmer is communicated with a grey water pool, and the hair filter is used for pretreatment of removing fiber substances from washing grey water and laundry wastewater; a plurality of biochemical treatment tanks are arranged and are filled with spherical or braid-shaped fillers; a water inlet of the membrane treatment module is connected with a water outlet of the biochemical treatment tank; the intelligent sewage management platform is in communication connection with all devices of the system, and full-process intelligent control and full-life operation and maintenance management are achieved. The system can meet the sewage treatment requirements of large passenger ships based on the structural characteristics of treatment cabin arrangement of large cruise ships, ocean passenger ships and other large ships and the sewage inlet and outlet water quality and quantity requirements.

Description

Technical Field

[0001] This invention relates to the field of marine environmental protection equipment technology, specifically to a sewage treatment system for the utilization of irregular cabin space in large passenger ships. It is applicable to large ships such as large cruise ships and ocean-going passenger ships, and is particularly designed to meet the requirements for the utilization of irregular cabin space and the treatment of complex sewage. Background Technology

[0002] Large passenger ships such as cruise ships and ocean liners typically have an engine room at the bottom, with the upper decks housing accommodations and leisure facilities. Therefore, they generally employ a "zoned collection + centralized treatment" approach. To conserve cabin space, irregularly shaped cabins are used as treatment areas for wastewater. The wastewater collection and treatment system collects and treats black water, kitchen greywater, laundry greywater, laundry wastewater, and garbage disposal wastewater, with a treatment capacity typically exceeding 1000 cubic meters per second. 3 / d. Emission requirements are to meet MEPC.227(64), the Alaska Convention, and GB 3552-2018. Currently, existing wastewater treatment technologies used in conventional marine and land-based applications present the following problems when applied to large passenger ships: (1) Due to the special nature of their missions, conventional ships have their engine rooms divided into multiple areas. Therefore, the wastewater collection and treatment equipment on conventional ships generally adopts a "zoned collection + zoned treatment" approach. The wastewater collected and treated by conventional ships mainly includes black water, kitchen grey water, and washing grey water, etc. The treatment capacity of a single wastewater collection and treatment unit is less than 100 m³. 3 / d. Each ship is equipped with one or more sewage treatment units. The equipment of each sewage treatment unit is integrated on a common base and delivered as a skid. The discharge requirements are to meet the requirements of MEPC.227(64) and GB 3552-2018. Compared with large passenger ships, conventional ships have simpler water treatment, lower concentration, smaller water volume, and lower discharge water quality requirements.

[0003] (2) Municipal wastewater treatment plants in the land-based sector generally adopt the method of "zoned collection + centralized treatment". The wastewater collected and treated includes black water, kitchen grey water, washing grey water, garbage disposal wastewater, industrial wastewater, and polluted rainwater (all wastewater is collected by gravity). The treatment capacity of municipal wastewater treatment plants is mostly over 10,000 m³. 3 / d. Compared to large passenger ships, municipal sewage treatment plants treat water with lower concentrations, and the treatment facilities are mostly open, without the limitations of marine environmental conditions such as tilting, swaying, salt spray, and mold.

[0004] (3) Whether it is a conventional ship or a land-based municipal sewage treatment plant, the sewage treatment site is a regular structural component, and the layout of aeration facilities and the control scheme of dissolved oxygen cannot be directly applied to large passenger ships.

[0005] In existing technologies, such as patent (CN114715962A), a "zoned collection + zoned treatment" mode is used, with a single unit processing less than 100 m³ of water. 3 The current design, while effective, cannot meet the large-volume water treatment needs of large passenger ships and does not consider the spatial adaptability of irregular cabins. The integrated equipment layout cannot utilize fragmented spaces. Patent (CN220976692U) focuses on the linkage control of valves and pump sets, lacking core technologies for wastewater treatment in irregular cabins. The fixed arrangement of aeration facilities cannot solve the problem of uneven dissolved oxygen distribution in irregular spaces, thus affecting treatment efficiency.

[0006] Therefore, in view of the structural characteristics of large passenger ships and the requirements of sewage quality and quantity, there is an urgent need for a sewage treatment system that can utilize the irregular cabin space of large passenger ships. This system is a sewage treatment system that can adapt to the irregular cabins of large passenger ships, meet the needs of large-volume water treatment, is intelligent and controllable, and achieves the required treatment effect. Summary of the Invention

[0007] The purpose of this invention is to propose a sewage treatment system for utilizing irregular cabin space in large passenger ships. It is a sewage treatment solution proposed based on the structural characteristics of the treatment cabin layout and the requirements for the quality and quantity of sewage inlet and outlet water in large ships such as large cruise ships and ocean passenger ships.

[0008] To solve the above technical problems, the following technical solution is adopted: A wastewater treatment system utilizing irregular cabin space on a large passenger ship includes a black water tank, an oil skimmer, a hair filter, a grey water tank, a centrifuge, a liquid tank, a regulating tank, a biological treatment tank, a membrane treatment module, a biosafety control module, a clear water tank, and supporting blowers, transfer pumps, conveying pumps, discharge pumps, and a smart wastewater management platform. The black water tank, grey water tank, regulating tank, and biological treatment tank all utilize irregular cabin space on the large passenger ship, and each tank is equipped with adaptively adjustable aeration facilities. The inlet of the oil skimmer is connected to the grey water tank in the passenger ship's galley. The system includes a discharge pipeline connected to an outlet that connects to a greywater tank for pre-treatment of kitchen greywater by skimming off oil; a hair filter for pre-treatment of washing greywater and laundry wastewater to remove fibrous materials; an equalization tank for homogenizing and equalizing the quantity of blackwater and greywater; multiple biochemical treatment tanks filled with spherical or braided packing material; an inlet of the membrane treatment module connected to the outlet of the biochemical treatment tank for further removal of suspended solids from the wastewater; and a smart wastewater management platform that communicates with all system devices to achieve intelligent control throughout the entire process and full-lifecycle operation and maintenance management.

[0009] Furthermore, the aeration equipment includes a blower, a gas distributor, an electric regulating valve, a dissolved oxygen detector, and a multi-layer closed aeration ring. The multi-layer closed aeration ring is arranged according to the water depth and shape of the pool, and the aeration ring has evenly spaced holes. The dissolved oxygen detector is located at the point in the pool with the lowest dissolved oxygen concentration. The electric regulating valve is linked to the dissolved oxygen detector and controls the air volume of each layer of aeration ring by automatically adjusting its opening, so that the dissolved oxygen concentration in the pool is maintained within a preset range.

[0010] Furthermore, the centrifuge consists of a rotating drum, filter bags, a rotating shaft, and a drive motor. The inlet of the centrifuge is connected to the outlet of the black water tank, the outlet is connected to the liquid tank, and the solid discharge outlet is connected to the passenger ship waste treatment system. The centrifuge achieves efficient solid-liquid separation of black water through centrifugal force. The separated solids are automatically packaged and transported to the waste treatment system, while the liquid enters the liquid tank for subsequent processing.

[0011] Furthermore, the inlet of the hair filter is connected to the washing grey water and laundry wastewater discharge pipeline, and the outlet is connected to the grey water tank, which is used to remove fibrous materials from the sewage.

[0012] Furthermore, the inlet of the equalization tank is connected to the outlet of the liquid tank and the outlet of the ash water tank, respectively. The black water pretreatment liquid and ash water are transported to the equalization tank through a transfer pump to achieve homogenization and equalization of wastewater treatment. The outlet of the equalization tank is connected to the biochemical treatment tank through a transfer pump.

[0013] Furthermore, the inlet of the biosafety control module is connected to the outlet of the membrane treatment module, and ultraviolet or ozone sterilization technology is used to disinfect the sewage. The outlet is connected to the clear water tank.

[0014] Furthermore, the intelligent wastewater management platform integrates a digital twin model and an electronic nautical chart.

[0015] Furthermore, the intelligent wastewater management platform automatically identifies the current discharge area of ​​ships using electronic nautical charts, analyzes the wastewater discharge indicators and limits of that area, and automatically selects and activates the corresponding number of biochemical treatment ponds to degrade organic pollutants.

[0016] Furthermore, the waste treatment system includes a waste treatment wastewater collection pipeline, which is connected to an ash water tank. The waste treatment wastewater flows from the ash water tank into a regulating tank for co-treatment.

[0017] Furthermore, this wastewater treatment system is suitable for large cruise ships and ocean-going passenger ships with a daily treatment capacity of more than 1,000 cubic meters.

[0018] The beneficial effects of this invention are: 1. Significantly improved space utilization: Utilizing irregularly shaped cabins as the core processing space eliminates the need to occupy regular areas, solving the problem of limited space on large passenger ships and saving more than 30% of installation space compared to traditional integrated equipment.

[0019] 2. Processing efficiency adapted to large water volume demands: By reducing the load through specialized pretreatment and dynamically adjusting the number of biological treatment tanks, the system can process an average of 1000-3000 m³ of water per day. 3 It meets the sewage discharge needs of large passenger ships, and its treatment efficiency is more than 50% higher than that of conventional ship systems.

[0020] 3. 100% compliance rate for discharge: Adaptive aeration ensures sufficient biochemical reaction, membrane treatment and biosafety control achieve deep purification, and the effluent quality meets the strict requirements of MEPC.227 (64), the Alaska Convention and GB 3552-2018, avoiding the risk of exceeding discharge standards.

[0021] 4. High level of intelligence: The intelligent wastewater management platform can automatically identify discharge areas, dynamically adjust treatment plans, provide fault warnings, and perform full life-cycle operation and maintenance, reducing manual operation by 80% and lowering maintenance costs.

[0022] 5. Wide range of applications: It can treat various types of wastewater such as black water, kitchen grey water, washing grey water, laundry wastewater, and garbage disposal wastewater from large passenger ships, without the need to set up separate treatment systems for different types of wastewater, thus simplifying equipment configuration.

[0023] In summary, the system of this invention can meet the wastewater treatment needs of large passenger ships, such as cruise ships and ocean-going passenger ships, based on the structural characteristics of the treatment compartment layout and the requirements of wastewater inflow and outflow quality and quantity. The treated water quality meets the requirements of MEPC.227(64), the Alaska Convention, and GB 3552-2018. Furthermore, the system is equipped with an intelligent wastewater management platform, enabling intelligent control and full lifecycle operation and maintenance management, reducing the need for personnel maintenance. Attached Figure Description

[0024] Figure 1 A flow chart of a wastewater treatment system for utilizing irregular cabin space in a large passenger ship, as described in this invention. Diagram labeling: 1-Black water tank (irregular compartment); 2-Centrifuge; 3-Liquid tank; 4-Skimmer; 5-Hair filter; 6-Grey water tank (irregular compartment); 7-Equalization tank (irregular compartment); 8-Biochemical treatment tank (irregular compartment); 9-Membrane treatment module; 10-Biosafety control module; 11-Clear water tank; 12-Intelligent wastewater management platform; 13-Fan; 14-Gas distributor; 15-Dissolved oxygen (DO) detector; 16-Transfer pump; 17-Transfer pump; 18-Discharge pump; 19-Electric regulating valve. Detailed Implementation

[0025] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings: like Figure 1 As shown, this invention proposes a wastewater treatment system for utilizing irregular cabin spaces on large passenger ships. Based on the structural characteristics of the treatment cabin layout and the requirements for the quality and quantity of influent and effluent water in large vessels such as large cruise ships and ocean-going passenger ships, a wastewater treatment solution is proposed. The system includes a black water tank 1, a centrifuge 2, a liquid tank 3, an oil skimmer 4, a hair filter 5, a grey water tank 6, a regulating tank 7, a biological treatment tank 8, a membrane treatment module 9, a biosafety control module 10, a clear water tank 11, a blower 13, a gas distributor 14, a dissolved oxygen (DO) detector 15, a transfer pump 16, a delivery pump 17, a discharge pump 18, an electric regulating valve 19, and a smart wastewater management platform 12, etc.

[0026] Black water pool 1, grey water pool 6, equalization pool 7, and biochemical treatment pool 8 are all irregularly shaped cabins on large passenger ships, equipped with adaptively adjustable aeration facilities. They can achieve intelligent control through the linkage of dissolved oxygen detector 15 and electric regulating valve 19 to ensure that the dissolved oxygen in each type of pool is within a certain range.

[0027] The aeration system includes a blower 13, a gas distributor 14, an electric regulating valve 19, a dissolved oxygen detector 15, and aeration rings. Multiple layers of closed aeration rings are installed in various water tanks according to the water depth and tank shape, with evenly spaced holes on the aeration rings. The dissolved oxygen detector 15 is installed at the point of lowest dissolved oxygen concentration in the tank. Based on the dissolved oxygen detection results, the air volume of each layer of aeration rings is adjusted automatically by regulating the opening of the electric regulating valve to ensure that the dissolved oxygen in various water tanks is always maintained within a certain range.

[0028] Centrifuge 2 consists of a rotating drum, filter bags, rotating shaft, motor, etc. It completes the solid-liquid separation of black water through centrifugal force to reduce the organic pollutant load of the subsequent treatment system.

[0029] Centrifuge 2 is used for efficient solid-liquid separation of wastewater in the black water tank to reduce the organic pollutant load on subsequent treatment systems. The liquid separated by the centrifuge enters liquid tank 3 for subsequent treatment, while the solids are automatically packaged and transported to the waste treatment system.

[0030] The oil skimmer 4 is used for pre-treatment of kitchen greywater by skimming off oil. The hair filter 5 is used for pre-treatment of washing greywater and laundry wastewater to remove fibrous materials.

[0031] The equalization tank 7 is used to homogenize and equalize the quantity of black water and grey water.

[0032] Biological treatment tank 8 is the main site for degrading organic pollutants. Multiple tanks are set up according to the water volume and discharge standards, and each tank is filled with spherical or braided packing material. The discharge area is automatically identified by electronic nautical charts, and the wastewater discharge indicators and limits of the discharge area are automatically analyzed according to the set program, and the appropriate number of biological treatment tanks 8 are automatically selected.

[0033] Membrane treatment module 9 is used to further remove suspended solids. Biosafety control module 10 is used to sterilize and disinfect the effluent.

[0034] The intelligent wastewater management platform integrates digital twin models, electronic nautical charts, and other technologies, enabling intelligent control and full lifecycle operation and maintenance management of the system.

Claims

1. A sewage treatment system for utilizing irregular cabin space on a large passenger ship, characterized in that, The system includes a black water tank, an oil skimmer, a hair filter, a grey water tank, a centrifuge, a liquid tank, a regulating tank, a biological treatment tank, a membrane treatment module, a biosafety control module, a clear water tank, and supporting equipment such as blowers, transfer pumps, conveying pumps, discharge pumps, and a smart wastewater management platform. The black water tank, grey water tank, regulating tank, and biological treatment tank all utilize irregularly shaped cabins found on large passenger ships. Each of these tanks is equipped with adaptively adjustable aeration facilities. The inlet of the oil skimmer is connected to the grey water discharge pipeline from the passenger ship's kitchen, and the outlet is connected to... The greywater tank is connected to the main body and is used for pre-treatment of kitchen greywater by skimming off oil; the hair filter is used for pre-treatment of washing greywater and laundry wastewater to remove fibrous materials; the equalization tank is used to homogenize and equalize the quantity of blackwater and greywater; there are multiple biological treatment tanks, each filled with spherical or braided packing material; the inlet of the membrane treatment module is connected to the outlet of the biological treatment tank to further remove suspended solids from the wastewater; the intelligent wastewater management platform is connected to all devices in the system to realize intelligent control of the entire process and operation and maintenance management throughout the entire life cycle.

2. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The aeration system includes a blower, a gas distributor, an electric regulating valve, a dissolved oxygen detector, and a multi-layer closed aeration ring. The multi-layer closed aeration ring is arranged according to the water depth and shape of the pool, and the aeration ring has evenly spaced holes. The dissolved oxygen detector is located at the point in the pool with the lowest dissolved oxygen concentration. The electric regulating valve is linked to the dissolved oxygen detector and automatically adjusts its opening to control the air volume of each layer of aeration ring, so that the dissolved oxygen concentration in the pool is maintained within a preset range.

3. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The centrifuge consists of a rotating drum, filter bags, a rotating shaft, and a drive motor. The inlet of the centrifuge is connected to the outlet of the black water tank, the outlet is connected to the liquid tank, and the solid discharge outlet is connected to the passenger ship waste treatment system. The centrifuge achieves efficient solid-liquid separation of black water through centrifugal force. The separated solids are automatically packaged and transported to the waste treatment system, while the liquid enters the liquid tank for subsequent processing.

4. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The inlet of the hair filter is connected to the washing grey water and laundry wastewater discharge pipeline, and the outlet is connected to the grey water tank, used to remove fibrous materials from the sewage.

5. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The inlet of the equalization tank is connected to the outlet of the liquid tank and the outlet of the ash water tank, respectively. The black water pretreatment liquid and ash water are transported to the equalization tank by a transfer pump to achieve homogenization and equalization of wastewater. The outlet of the equalization tank is connected to the biochemical treatment tank by a transfer pump.

6. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The inlet of the biosafety control module is connected to the outlet of the membrane treatment module, and ultraviolet or ozone sterilization technology is used to disinfect the sewage. The outlet is connected to the clear water tank.

7. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 1, characterized in that, The intelligent wastewater management platform integrates a digital twin model and an electronic nautical chart.

8. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 6, characterized in that, The intelligent wastewater management platform automatically identifies the current discharge area of ​​ships using electronic nautical charts, analyzes the wastewater discharge indicators and limits of that area, and automatically selects and activates the corresponding number of biochemical treatment tanks to degrade organic pollutants.

9. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to claim 3, characterized in that, The waste treatment system includes a waste treatment wastewater collection pipeline, which is connected to an ash water tank. The wastewater from the waste treatment wastewater flows into a regulating tank via the ash water tank for co-treatment.

10. The sewage treatment system for utilizing irregular cabin space in large passenger ships according to any one of claims 1-9, characterized in that, This wastewater treatment system is suitable for large cruise ships and ocean-going passenger ships with a daily treatment capacity of more than 1,000 cubic meters.

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