Ship tail gas emission continuous online monitoring system suitable for five channels
The five-channel continuous online monitoring system for ship exhaust emissions, employing a combination of exhaust gas acquisition, demisting and water removal, and electrochemical analysis modules, enables real-time monitoring of ship exhaust gases and self-detoxification of sensors. This solves the problem of sensor poisoning and ensures the long-term stability and detection accuracy of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-20
AI Technical Summary
Existing technologies cannot achieve comprehensive monitoring of ship engine emissions data under ship operating conditions, and electrochemical sensors are prone to poisoning when detecting exhaust gas components for extended periods, leading to a decrease in detection accuracy.
A five-channel continuous online monitoring system for ship exhaust emissions is adopted, including an exhaust gas acquisition module, a demisting and water removal module, a pollutant analysis chamber module, and an electrochemical analysis module. The system uses solenoid valves to control the alternating introduction of exhaust gas and air, enabling the electrochemical sensor to self-detoxify and avoid poisoning. By combining the alternating operation of the two modules, real-time detection of six gaseous pollutant components can be achieved.
It enables real-time detection of six components of pollutants in the exhaust gas of five diesel engines, avoids the poisoning phenomenon of electrochemical sensors, ensures the long-term durable and reliable operation of the system, and reduces the shipowner's operating costs.
Smart Images
Figure CN224019718U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of monitoring equipment technology, specifically to a continuous online monitoring system for ship exhaust emissions suitable for five channels. Background Technology
[0002] Currently, most monitoring of ship exhaust emissions relies on manual onboard sampling or drone-borne monitoring equipment to track ship plumes. Neither method can comprehensively monitor engine emissions throughout the entire ship's operating cycle, resulting in insufficient analysis of environmental big data. To obtain real-time and accurate diesel engine exhaust emission data during ship navigation, a continuous online monitoring system needs to be installed on the ship. A typical ship has two main propulsion diesel engines and two auxiliary generator diesel engines; some ships have two main propulsion diesel engines and three auxiliary generator diesel engines. Considering ship operating costs, using a single continuous online monitoring system to monitor the exhaust components of five diesel engines in real time would significantly reduce shipowner operating costs and enhance the product's competitiveness. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a continuous online monitoring system for ship exhaust emissions suitable for five channels, which avoids electrochemical sensor poisoning and achieves long-term durable and reliable operation of the system.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a continuous online monitoring system for ship exhaust emissions suitable for five channels, comprising an exhaust gas acquisition module installed on the ship, a demisting and dewatering module connected to the exhaust gas acquisition module and for demisting and dewatering the exhaust gas, and an analysis device connected to the demisting and dewatering module. The analysis device includes a pollutant analysis chamber module connected to the demisting and dewatering module, two alternating electrochemical analysis modules connected to the demisting and dewatering module via a control module, and an electrical control and transmission module connecting the two electrochemical analysis modules. Solenoid valves are provided between the two electrochemical analysis modules and the demisting and dewatering module.
[0005] The control module controls the introduction of exhaust gas and air into different electrochemical analysis modules.
[0006] Preferably, the exhaust gas collection module includes five probes that are respectively installed on the exhaust pipes of five diesel engines to collect sample gas, and five pipes with one end connected to different probes and the other end connected to a connector, the connector being connected to a demisting and dewatering module.
[0007] Preferably, the control module includes an adjustment block with an adjustment groove at the top, a sealing plate that is detachably and sealed at the opening of the adjustment groove, a tail gas connection pipe and connector symmetrically arranged on the symmetrical side of the adjustment block and communicating with the interior of the adjustment groove, two outlet pipes arranged at the bottom of the adjustment block and communicating with the interior of the adjustment groove, and a control component arranged in the adjustment groove that can control the outlet pipes to separately export tail gas and air. The connector is used to input air, and the two outlet pipes are respectively connected to different electrochemical analysis modules.
[0008] Preferably, the control component includes a control block disposed in the adjustment groove and having a cylindrical rotating groove on its top end face, a rotating column rotatably disposed on the bottom wall of the rotating groove along the axial direction, a sealing plate fixedly disposed on the rotating column and having its side surface sealed against the groove wall, and a sealing disc rotatably disposed at the opening of the rotating groove and having its bottom end connected to the top side of the sealing plate. The rotating grooves at the left and right symmetrical positions of the sealing plate are respectively connected to exhaust gas connection pipes and connectors through connectors. The bottom wall of the rotating groove is provided with two through holes respectively connected to different outlet pipes at the position below the bottom side of the sealing plate.
[0009] Preferably, the connector includes two conveying pipes passing through the regulating groove. The two conveying pipes are connected to a connector and an exhaust gas connection pipe at opposite ends, and their adjacent ends pass through the control block and are connected to the rotating grooves on both sides of the sealing plate.
[0010] Preferably, the control component includes a second electromagnet positioned on one side of the top of the sealing disc via a connecting block, and two first electromagnets symmetrically positioned on both sides of the top of the control block about the second electromagnet, with the adjacent ends of the two first electromagnets having the same magnetic pole.
[0011] Preferably, the connector is connected to the output end of the diaphragm pump, and the input end of the diaphragm pump is connected to the demisting and dewatering module through an air connection pipe.
[0012] The beneficial effects of this utility model are as follows: It adopts two sets of pollutant analysis gas chamber modules and two sets of electrochemical analysis modules. These two sets of pollutant analysis gas chamber modules and two sets of electrochemical analysis modules are integrated with six one-inlet and two-outlet gas seats and two solenoid valves to realize the real-time detection of six gaseous pollutant components. Finally, it realizes one in use and one in standby, alternating operation. The non-operating module will draw in natural air for self-detoxification operation, so as to realize the real-time detection function of six components (NO / NO2 / CO / CO2 / SOx / O2) of diesel engine exhaust pollutants in five channels. At the same time, it avoids the poisoning phenomenon of electrochemical sensors and realizes the long-term durable and reliable operation of the system. Attached Figure Description
[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0014] Figure 1 This is a simplified structural diagram of the five-channel continuous online monitoring system for ship exhaust emissions proposed in this utility model.
[0015] Figure 2 This is a schematic diagram of the control module structure of this utility model.
[0016] Figure 3 This is a schematic diagram of the control component structure of this utility model.
[0017] Figure 4 This is a schematic diagram of the unfolded structure of the control component of this utility model.
[0018] Figure 5 This is a schematic diagram of the internal structure of the adjustment groove of this utility model.
[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the control component of this utility model.
[0020] In the diagram: 1. Air connection pipe; 2. Exhaust gas connection pipe; 3. Control module; 4. Outlet pipe; 5. Diaphragm pump; 6. Mounting block; 7. Electrochemical analysis module; 8. Connector; 9. Adjustment tank; 10. Sealing plate; 11. Delivery pipe; 12. Control block; 13. Rotating tank; 14. Sealing disc; 15. Connecting block; 16. First electromagnet; 17. Second electromagnet; 18. Rotating column; 19. Sealing plate; 20. Through hole. Detailed Implementation
[0021] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the embodiments without creative effort are all within the protection scope of this utility model.
[0022] Please see Figure 1-6A continuous online monitoring system for ship exhaust emissions suitable for five channels includes an exhaust gas acquisition module installed on the ship, a demisting and dewatering module connected to the exhaust gas acquisition module and demisting and dewatering the exhaust gas, and an analysis device connected to the demisting and dewatering module. The analysis device includes a pollutant analysis chamber module connected to the demisting and dewatering module, two alternating electrochemical analysis modules 7 connected to the demisting and dewatering module via a control module 3, and an electrical control transmission module connecting the two electrochemical analysis modules 7. Solenoid valves are installed between the two electrochemical analysis modules 7 and the demisting and dewatering module.
[0023] Control module 3 controls the introduction of exhaust gas and air into different electrochemical analysis modules 7 respectively.
[0024] like Figure 1-6 As shown, the components of exhaust gas pollutants are detected in real time by the electrochemical analysis module 7. In conjunction with two electrochemical analysis modules 7, one detects in real time and the other undergoes a natural detoxification process by inhaling air. After a period of use, exhaust gas is introduced into the electrochemical analysis module 7 that introduces air, while the other is introduced into the other for detoxification. This avoids the poisoning of the electrochemical sensor and achieves long-term durable and reliable operation of the system.
[0025] The exhaust gas collection module includes five probes that are installed on the exhaust pipes of five diesel engines to collect sample gas, and five pipes that are connected at one end to different probes and at the other end to a connector. The connector is connected to a demisting and dewatering module.
[0026] The control module 3 includes an adjustment block with an adjustment groove 9 at the top, a sealing plate 10 that is detachably and sealed at the opening of the adjustment groove 9, a tail gas connection pipe 2 and a connector 8 that are symmetrically arranged on the symmetrical side of the adjustment block and communicate with the interior of the adjustment groove 9, two outlet pipes 4 that are arranged at the bottom of the adjustment block and communicate with the interior of the adjustment groove 9, and a control component that is arranged in the adjustment groove 9 and can control the outlet pipes 4 to discharge tail gas and air respectively. The connector 8 is used to input air, and the two outlet pipes 4 are respectively connected to different electrochemical analysis modules 7.
[0027] Two electrochemical analysis modules 7 are mounted on the mounting block 6, and the two electrochemical analysis modules 7 are connected to two outlet pipes 4 through different pipes.
[0028] The electrochemical analysis module 7 is equipped with an electrochemical sensor for detecting the components of exhaust gas. However, the electrochemical sensor may become poisoned if it continuously detects exhaust gas for a long time. After detecting exhaust gas for a period of time, air is introduced into the electrochemical sensor to detoxify it and avoid poisoning of the electrochemical sensor due to prolonged detection of exhaust gas.
[0029] The control component controls two outlet pipes 4 to introduce exhaust gas and air into different electrochemical analysis modules 7 respectively. This ensures that while the exhaust gas components are detected in real time, the other electrochemical analysis module 7 is simultaneously detoxified. After long-term use, the exhaust gas is controlled to be introduced into the electrochemical analysis module 7 that has been detoxified by air, and the air is introduced into the other electrochemical analysis module 7 to detoxify it. This ensures the long-term stable use of the system, avoids the poisoning of electrochemical sensors, and achieves long-term durable and reliable operation of the system.
[0030] The control assembly includes a control block 12 disposed in the adjustment groove 9 and having a cylindrical rotating groove 13 on its top end face; a rotating column 18 rotatably disposed on the bottom wall of the rotating groove 13 along the axial direction; a sealing plate 19 fixedly disposed on the rotating column 18 and having its side surface sealed against the groove wall of the rotating groove 13; and a sealing disc 14 rotatably disposed at the opening of the rotating groove 13 and connected at its bottom end to the top side of the sealing plate 19 via a rotating component. The interior of the rotating groove 13, which is symmetrically located on the left and right sides of the sealing plate 19, is connected to the exhaust gas connection pipe 2 and the connector 8 respectively via connectors. The bottom wall of the rotating groove 13, located below the bottom side of the sealing plate 19, has two through holes 20 respectively connected to different outlet pipes 4.
[0031] The connector includes two conveying pipes 11 that pass through the regulating groove 9. The two conveying pipes 11 are connected to the connector 8 and the exhaust gas connection pipe 2 respectively at one end away from each other, and their adjacent ends pass through the control block 12 and communicate with the rotating grooves 13 on both sides of the sealing plate 19.
[0032] The control unit includes a second electromagnet 17 located on one side of the top of the sealing disc 14 via a connecting block 15, and two first electromagnets 16 symmetrically arranged on both sides of the top of the control block 12 about the second electromagnet 17, with the two first electromagnets 16 having the same magnetic pole at adjacent ends.
[0033] When real-time detection of exhaust gas is performed, the first electromagnet 16 and the second electromagnet 17 are energized. Since the adjacent ends of the two first electromagnets 16 have the same magnetic poles, the energization of the second electromagnet 17 will inevitably cause the magnetic poles at both ends of the second electromagnet 17 to be the same as and opposite to the adjacent ends of the two first electromagnets 16, respectively. This causes the two first electromagnets 16 to exert repulsive and attractive forces on the second electromagnet 17, controlling the second electromagnet 17 to move towards the first electromagnet 16 that has the attractive force. This drives the sealing disc 14 and the sealing plate 19 to rotate within the rotating groove 13, allowing the exhaust gas and air to be introduced into the two electrochemical analysis modules 7 through the two through holes 20 and the outlet pipe 4 at the bottom of the rotating groove 13, respectively. This ensures that while one electrochemical analysis module 7 is performing real-time detection of exhaust gas, natural air is simultaneously injected into the other electrochemical analysis module 7 to perform electrochemical analysis. The sensor detoxifies, and after a certain period of time, the magnetic poles at both ends of the second electromagnet 17 are reversed. At this time, the second electromagnet 17 moves towards the other first electromagnet 16, causing the sealing disk 14 and the sealing plate 19 to rotate in the opposite direction. At this time, the air and exhaust gas transported in the two through holes 20 are reversed. The through hole 20 that transports air becomes the through hole that transports exhaust gas, and the through hole 20 that transports exhaust gas becomes the through hole that transports air. This allows the air to enter the electrochemical analysis module 7, which detects exhaust gas in real time, for detoxification. The electrochemical analysis module 7, which detoxifies the air, performs real-time detection of the exhaust gas, avoiding the situation where the electrochemical sensor in the same electrochemical analysis module 7 performs real-time detection of exhaust gas components for a long time. Because the gaseous pollutants in the exhaust gas cause the electrochemical sensor to be under pollutant detection for a long time, the detection accuracy of the sensor's chemical analysis base material will decrease due to pollutant poisoning.
[0034] Connector 8 is connected to the output end of diaphragm pump 5, and the input end of diaphragm pump 5 is connected to the demisting and dewatering module through air connection pipe 1.
[0035] A continuous online monitoring system for ship exhaust emissions suitable for five channels includes five sets of ship diesel engine exhaust gas acquisition modules, one set of flue gas demisting and water removal module, two sets of pollutant analysis chamber modules, two sets of electrochemical analysis modules, and one set of electrical control and transmission module connected in sequence.
[0036] One end of the exhaust gas collection module is connected to the exhaust pipe, which is used to extract sample gas from the exhaust pipe and initially filter the dust particles in the sample gas. It is then connected to the demisting and dewatering module through a constant temperature heat tracing pipe.
[0037] The demisting and dehydration module further filters the oil and dust in the sample gas, then condenses and removes water, and delivers the demisting and dehydration sample gas to the pollutant analysis gas chamber module.
[0038] The pollutant analysis gas chamber module uniformly and stably diffuses and transfers the filtered sample gas to the electrochemical analysis module 7.
[0039] The electrochemical analysis module 7 detects and analyzes the sample gas in the pollutant analysis chamber module and outputs an electrical signal to the electrical control and transmission module.
[0040] Five sets of marine diesel engine exhaust gas collection modules are used to collect exhaust gas from the exhaust pipes of five diesel engines respectively. Through a five-inlet, one-outlet manifold integrated tube bundle within the module, and in conjunction with five solenoid valves, balanced and quantitative collection of exhaust gas from the five channels is achieved. The diesel engine exhaust gas collected from all five channels passes through a flue gas demisting and dewatering module to remove oil mist, particulate impurities, and high-temperature water vapor from the exhaust gas. The filtered five-channel diesel engine exhaust gas then enters the pollutant analysis module. The electrochemical detection and analysis process for gaseous pollutants is susceptible to sensor poisoning. When the electrochemical sensor is in continuous pollutant detection operation, the chemical analysis substrate of the sensor may be poisoned by pollutants. To avoid decreased detection accuracy, this invention employs two sets of pollutant analysis gas chamber modules and two sets of electrochemical analysis modules. These modules, along with two solenoid valves, utilize six integrated gas seats with one inlet and two outlets to achieve real-time detection of six gaseous pollutant components. The system operates alternately, with one module in use and the other on standby. The non-operating module draws in natural air for self-detoxification, ultimately enabling real-time detection of the six components (NO / NO2 / CO / CO2 / SOx / O2) in five-channel diesel engine exhaust. This also avoids poisoning of the electrochemical sensor, ensuring long-term, durable, and reliable system operation.
[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A continuous online monitoring system for ship exhaust emissions suitable for five channels, comprising an exhaust gas acquisition module installed on the ship, a demisting and dewatering module connected to the exhaust gas acquisition module for demisting and dewatering the exhaust gas, and an analysis device connected to the demisting and dewatering module, characterized in that, The analysis device includes a pollutant analysis chamber module connected to the demisting and dehydration module, two electrochemical analysis modules (7) used alternately connected to the demisting and dehydration module via a control module (3), and an electrical control transmission module connecting the two electrochemical analysis modules (7). Solenoid valves are provided between the two electrochemical analysis modules (7) and the demisting and dehydration module. The control module (3) controls the exhaust gas and air to be introduced into different electrochemical analysis modules (7) respectively.
2. The continuous online monitoring system for ship exhaust emissions applicable to five channels according to claim 1, characterized in that: The exhaust gas collection module includes five probes that are installed on the exhaust pipes of five diesel engines to collect sample gas, and five pipes that are connected at one end to different probes and at the other end to a connector. The connector is connected to a demisting and dewatering module.
3. The continuous online monitoring system for ship exhaust emissions applicable to five channels according to claim 1, characterized in that: The control module (3) includes an adjustment block with an adjustment groove (9) at the top, a sealing plate (10) that is detachably and sealed at the opening of the adjustment groove (9), a tail gas connection pipe (2) and a connector (8) that are symmetrically arranged on the symmetrical side of the adjustment block and communicate with the interior of the adjustment groove (9), two outlet pipes (4) that are arranged at the bottom of the adjustment block and communicate with the interior of the adjustment groove (9), and a control component that is arranged in the adjustment groove (9) and can control the outlet pipes (4) to discharge tail gas and air respectively. The connector (8) is used to input air, and the two outlet pipes (4) are respectively connected to different electrochemical analysis modules (7).
4. The continuous online monitoring system for ship exhaust emissions applicable to five channels according to claim 3, characterized in that: The control components include a control block (12) set in the adjustment groove (9) with a cylindrical rotating groove (13) on the top end face, a rotating column (18) rotatably set on the bottom wall of the rotating groove (13) along the axial direction, a sealing plate (19) fixedly set on the column body of the rotating column (18) and sealed to the groove wall of the rotating groove (13) on the side, and a sealing disc (14) rotatably set at the opening position of the rotating groove (13) and connected to the top side of the sealing plate (19) at the bottom end. The rotating groove (13) at the left and right symmetrical positions of the sealing plate (19) is connected to the exhaust gas connection pipe (2) and the connector (8) respectively through the connector. The bottom wall of the rotating groove (13) is located below the bottom side of the sealing plate (19) with two through holes (20) respectively connected to different outlet pipes (4).
5. A continuous online monitoring system for ship exhaust emissions suitable for five channels according to claim 4, characterized in that: The connector includes two conveying pipes (11) passing through the regulating groove (9). The two conveying pipes (11) are connected to the connector (8) and the exhaust gas connection pipe (2) respectively at one end away from each other, and their adjacent ends pass through the control block (12) and communicate with the rotating grooves (13) on both sides of the sealing plate (19).
6. A continuous online monitoring system for ship exhaust emissions suitable for five channels according to claim 4, characterized in that: The control unit includes a second electromagnet (17) located on one side of the top of the sealing disc (14) via a connecting block (15), and two first electromagnets (16) symmetrically arranged on both sides of the top of the control block (12) about the second electromagnet (17), with the two first electromagnets (16) having the same magnetic pole at adjacent ends.
7. A continuous online monitoring system for ship exhaust emissions suitable for five channels according to claim 4, characterized in that: The connector (8) is connected to the output end of the diaphragm pump (5), and the input end of the diaphragm pump (5) is connected to the demisting and dewatering module through the air connection pipe (1).