Chimney heterodifferential type ship exhaust emission online monitoring system and method

Abstract

The invention provides a chimney heterodifferential ship exhaust emission online monitoring system and method, and relates to the technical field of environment monitoring. Aiming at the problems of low monitoring efficiency and high monitoring cost in the prior art, the monitoring system provided by the invention comprises a tail gas monitoring unit, a wind speed and direction monitoring unit, a receiving unit, a data acquisition unit, a data processing unit and a management unit, can automatically complete monitoring work, does not need manual operation, saves manpower and material resources, and improves the monitoring efficiency. Therefore, the monitoring efficiency is improved, and the monitoring cost is reduced. And a data processing unit in the monitoring system performs differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data. According to the differential processing method, noise and errors of the sensor are reduced, stability and accuracy of concentration data are enhanced, reference concentration data changing along with time and place changes are dynamically corrected, and the monitoring result is more accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to an external differential online monitoring system and method for ship exhaust emissions. Background Art

[0002] Shipping has made important contributions to the world economy, but it has also caused a certain degree of air pollution. In order to reduce air pollution caused by ship emissions, the Ministry of Transport issued the "Implementation Plan for Ship Air Pollutant Emission Control Areas", establishing a larger and more stringent emission control area to further reduce ship SO2, NO x How to effectively monitor ship emissions has become a hot topic. Traditional detection methods basically use random sampling for laboratory testing, which has problems such as low efficiency and high cost.

[0003] Therefore, an external chimney differential ship exhaust emission online monitoring system and method are developed to improve monitoring efficiency and reduce monitoring costs. Summary of the invention

[0004] In view of the problems of low monitoring efficiency and high monitoring cost in the prior art, in a first aspect, the present invention proposes an online monitoring system for ship exhaust emissions with differential type outside a chimney, wherein the ship comprises a chimney, and the monitoring system comprises: The exhaust gas monitoring unit includes a reference sensor and a plurality of monitoring sensors, wherein the reference sensor is located at an upwind point of the chimney, and the plurality of monitoring sensors are located at other points of the chimney except the upwind point, wherein the reference sensor monitors in real time to obtain reference concentration data of exhaust gas components of the ship, and the monitoring sensor monitors in real time to obtain monitoring concentration data of exhaust gas components of the ship; Wind speed and direction monitoring unit, used to monitor wind speed data and wind direction information at the chimney in real time; A receiving unit, used to obtain static and dynamic information of the ship; A data acquisition unit, connected to the exhaust gas monitoring unit, the wind speed and direction monitoring unit, and the receiving unit, for acquiring reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information, and dynamic information; A data processing unit is connected to the data acquisition unit. The data processing unit averages the multiple monitoring concentration data to obtain the average monitoring concentration data, and performs differential processing on the average monitoring concentration data and the reference concentration data to obtain the concentration change data. If the concentration change data is within the preset violation concentration data range, an alarm signal is generated, and the reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information are saved; The management unit is connected to the data processing unit and is used to display and query reference concentration data, multiple monitoring concentration data, concentration change data, wind speed data, wind direction information, static information and dynamic information.

[0005] In combination with the first aspect, in some implementations of the first aspect, the multiple monitoring sensors include a first monitoring sensor, a second monitoring sensor and a third monitoring sensor, the first monitoring sensor is located at a downwind point of the chimney, the second monitoring sensor is located at a first side wind direction point of the chimney, and the third monitoring sensor is located at a second side wind direction point of the chimney, wherein the first side wind direction point and the second side wind direction point are located on opposite sides of the chimney.

[0006] In combination with the first aspect, in some implementations of the first aspect, the multiple monitoring sensors include a first monitoring sensor, a second monitoring sensor and a third monitoring sensor, the first monitoring sensor is located at a downwind point of the chimney, the second monitoring sensor and the third monitoring sensor are located on opposite sides of the chimney, and the line connecting the reference sensor and the first monitoring sensor is perpendicular to the line connecting the second monitoring sensor and the third monitoring sensor.

[0007] In combination with the first aspect, in some implementations of the first aspect, a line connecting the second monitoring sensor and the third monitoring sensor passes through the axis of the chimney.

[0008] In combination with the first aspect, in some implementations of the first aspect, the reference sensor and the monitoring sensor both include a nitrogen oxide electrochemical gas sensor and a drying assembly, wherein the nitrogen oxide electrochemical gas sensor includes a nitric oxide electrochemical gas sensor and a nitrogen dioxide electrochemical gas sensor, the concentration detection range of the nitric oxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 25 ppm; the concentration detection range of the nitrogen dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

[0009] In combination with the first aspect, in some implementations of the first aspect, the reference sensor and the monitoring sensor both include a sulfur dioxide electrochemical gas sensor and a drying component, and the concentration detection range of the sulfur dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

[0010] In combination with the first aspect, in some implementations of the first aspect, the reference sensor and the monitoring sensor both include a carbon dioxide electrochemical gas sensor and a drying component, and the concentration detection range of the carbon dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 5000 ppm.

[0011] In a second aspect, the present invention provides a chimney external differential type ship exhaust emission online monitoring method, the ship includes a chimney, and the monitoring method is applied to the chimney external differential type ship exhaust emission online monitoring system provided in any of the above embodiments, comprising the following steps: Step S1, using a wind speed and wind direction monitoring unit to monitor the wind speed data and wind direction information at the chimney in real time; Step S2, using a receiving unit to obtain static information and dynamic information of the ship; Step S3, using an exhaust gas monitoring unit to monitor in real time to obtain reference concentration data and multiple monitoring concentration data of exhaust gas components of the ship; Step S4, using a data acquisition unit to obtain reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information; Step S5, using a data processing unit to average multiple monitoring concentration data to obtain average monitoring concentration data, and performing differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data. If the concentration change data is within a preset violation concentration data range, an alarm signal is generated, and the reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information are saved; Step S6, using the management unit to display and query reference concentration data, multiple monitoring concentration data, concentration change data, wind speed data, wind direction information, static information and dynamic information.

[0012] In a third aspect, the present invention provides a computer-readable storage medium storing a computer program for executing the chimney external differential type on-line monitoring method for ship exhaust emissions provided in the above-mentioned embodiment.

[0013] In a fourth aspect, the present invention provides an electronic device, the electronic device comprising: processor; a memory for storing processor-executable instructions; The processor is used to execute the chimney external differential type ship exhaust emission online monitoring method provided in the above embodiment.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) The monitoring system provided by the present invention includes an exhaust gas monitoring unit, a wind speed and direction monitoring unit, a receiving unit, a data acquisition unit, a data processing unit and a management unit. The monitoring system can automatically complete the monitoring work without manual operation, saving manpower and material resources, thereby improving the monitoring efficiency and reducing the monitoring cost.

[0015] (2) The data processing unit in the monitoring system performs differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data. This differential processing method reduces the noise and error of the sensor, enhances the stability and accuracy of the concentration data, and dynamically corrects the reference concentration data that changes due to changes in time and location, making the monitoring results more accurate and reliable.

[0016] (3) The monitoring system provided by the present invention is not directly connected to the chimney and does not change the structure of the chimney. Therefore, in actual application, the installation process of the monitoring system is relatively simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Shown is a structural schematic diagram of an external differential ship exhaust emission online monitoring system provided by an embodiment of the present invention.

[0019] Figure 2 The figure is a flow chart of a chimney external differential type ship exhaust emission online monitoring method provided by an embodiment of the present invention.

[0020] Figure numerals: monitoring system 10; chimney 20; exhaust gas monitoring unit 11; reference sensor 111; first monitoring sensor 112; second monitoring sensor 113; third monitoring sensor 114; wind speed and direction monitoring unit 12; receiving unit 13; data acquisition unit 14; data processing unit 15; management unit 16. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The specific implementation modes of the present invention are described below.

[0023] In view of the problems of low monitoring efficiency and high monitoring cost in the prior art, the present invention proposes an external chimney differential ship exhaust emission online monitoring system, which improves the monitoring efficiency, reduces the monitoring cost, enhances the stability and accuracy of the concentration data, and its installation process is simple and easy to implement.

[0024] Example 1 like Figure 1 As shown, the present invention proposes an online monitoring system for ship exhaust emissions of a chimney external differential type, the ship includes a chimney 20, and the monitoring system 10 includes: The exhaust gas monitoring unit 11 includes a reference sensor 111 and a plurality of monitoring sensors. The reference sensor 111 is located at an upwind point of the chimney 20, and the plurality of monitoring sensors are located at other points of the chimney 20 except the upwind point. The reference sensor 111 monitors in real time to obtain reference concentration data of exhaust gas components of the ship, and the monitoring sensors monitor in real time to obtain monitoring concentration data of exhaust gas components of the ship; A wind speed and direction monitoring unit 12 is used to monitor the wind speed data and wind direction information at the chimney 20 in real time; A receiving unit 13, used to obtain static information and dynamic information of the ship; Exemplarily, the receiving unit 13 may be an Automatic Identification System (AIS) receiving unit, which is a hardware device for receiving and processing signals from an Automatic Identification System (AIS). AIS is an automatic tracking system for exchanging information between ships and between ships and shore-based facilities, and is mainly used to improve the safety and efficiency of maritime navigation.

[0025] Among them, static information includes ship name, Maritime Mobile Service Identity (MMSI), etc. Dynamic information includes the latitude and longitude of the ship, speed, etc.

[0026] The data acquisition unit 14 is connected to the exhaust gas monitoring unit 11, the wind speed and direction monitoring unit 12, and the receiving unit 13, and is used to obtain reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information, and dynamic information; The data processing unit 15 is connected to the data acquisition unit 14. The data processing unit 15 averages the multiple monitoring concentration data to obtain the average monitoring concentration data, and performs differential processing on the average monitoring concentration data and the reference concentration data to obtain the concentration change data. If the concentration change data is within the preset violation concentration data range, an alarm signal is generated, and the reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information are saved; The management unit 16 is connected to the data processing unit 15 and is used to display and query reference concentration data, multiple monitoring concentration data, concentration change data, wind speed data, wind direction information, static information and dynamic information.

[0027] The monitoring system 10 provided by the present invention can automatically complete the monitoring work without manual operation, saving manpower and material resources, thereby improving monitoring efficiency and reducing monitoring costs. The data processing unit 15 in the monitoring system 10 performs differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data. This differential processing method reduces the noise and error of the sensor, enhances the stability and accuracy of the concentration data, and dynamically corrects the reference concentration data that changes due to changes in time and location, making the monitoring results more accurate and reliable. The monitoring system 10 is not directly connected to the chimney 20 and does not change the structure of the chimney 20. Therefore, in actual application, the installation process of the monitoring system 10 is relatively simple and easy to implement.

[0028] In conjunction with the first aspect, in some implementations of the first aspect, reference is made to Figure 1 The multiple monitoring sensors include a first monitoring sensor 112, a second monitoring sensor 113 and a third monitoring sensor 114. The first monitoring sensor 112 is located at a downwind point of the chimney 20, the second monitoring sensor 113 is located at a first side wind direction point of the chimney 20, and the third monitoring sensor 114 is located at a second side wind direction point of the chimney 20, wherein the first side wind direction point and the second side wind direction point are located on opposite sides of the chimney 20.

[0029] refer to Figure 1 , the upwind point can be Figure 1 The downwind point above the chimney 20 in the direction of the view shown can be Figure 1 Below the chimney 20 in the direction of the view shown, the first side wind direction point can be Figure 1 On the left side of the chimney 20 in the direction of the view shown, the second side wind direction point can be Figure 1 The right side of the chimney 20 in the direction of view is shown.

[0030] In some embodiments, the reference sensor 111 is arranged as far away from the chimney 20 as possible, and the first monitoring sensor 112, the second monitoring sensor 113 and the third monitoring sensor 114 are all 10 cm away from the chimney 20 in the horizontal direction and 50 cm above the top of the chimney.

[0031] The embodiment of the present invention can monitor the vertical diffusion degree of ship exhaust gas by setting the first monitoring sensor 112, and can monitor the horizontal diffusion degree of ship exhaust gas by setting the second monitoring sensor 113 and the third monitoring sensor 114, so as to help researchers understand the distribution of exhaust gas in the environment and the diffusion pattern and range of exhaust gas. The embodiment of the present invention can form a comprehensive monitoring network by setting sensors in multiple directions, covering a wider area and obtaining more comprehensive concentration data.

[0032] In conjunction with the first aspect, in some implementations of the first aspect, reference is made to Figure 1 The multiple monitoring sensors include a first monitoring sensor 112, a second monitoring sensor 113 and a third monitoring sensor 114. The first monitoring sensor 112 is located at a downwind point of the chimney 20, and the second monitoring sensor and the third monitoring sensor are located on opposite sides of the chimney 20. The line connecting the reference sensor 111 and the first monitoring sensor 112 is perpendicular to the line connecting the second monitoring sensor 113 and the third monitoring sensor 114.

[0033] Since the second monitoring sensor 113 and the third monitoring sensor 114 are located on both sides of the chimney 20 and the connecting line is perpendicular to the connecting line of the reference sensor 111 and the first monitoring sensor 112, the influence of wind direction on exhaust gas diffusion can be evaluated more accurately.

[0034] In conjunction with the first aspect, in some implementations of the first aspect, reference is made to Figure 1 , a line connecting the second monitoring sensor 113 and the third monitoring sensor 114 passes through the axis of the chimney 20 .

[0035] The embodiment of the present invention ensures that the layout of the monitoring system 10 is symmetrical by passing the connection line between the second monitoring sensor 113 and the third monitoring sensor 114 through the axis of the chimney 20. This symmetry helps to capture the diffusion of exhaust gas in different directions and ensure the uniformity and consistency of the monitoring concentration data.

[0036] Since the connecting line passes through the axis of the chimney 20, the second monitoring sensor 113 and the third monitoring sensor 114 are respectively located on both sides of the chimney 20 and are equidistant from each other. This ensures that the concentration data detected from both sides have the same reference point (i.e., the center of the chimney 20), thereby improving the symmetry and uniformity of the concentration data.

[0037] In combination with the first aspect, in some implementations of the first aspect, the reference sensor 111 and the monitoring sensor both include a nitrogen oxide electrochemical gas sensor and a drying component, wherein the nitrogen oxide electrochemical gas sensor includes a nitric oxide electrochemical gas sensor and a nitrogen dioxide electrochemical gas sensor, and the concentration detection range of the nitric oxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 25 ppm; the concentration detection range of the nitrogen dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

[0038] Among them, the nitric oxide electrochemical gas sensor is used to detect and measure the concentration of nitric oxide (NO) in the environment, the nitrogen dioxide electrochemical gas sensor is used to detect and measure the concentration of nitrogen dioxide (NO2) in the environment, and the drying component is used to dry the ship's exhaust gas.

[0039] In combination with the first aspect, in some implementations of the first aspect, the reference sensor 111 and the monitoring sensor both include a sulfur dioxide electrochemical gas sensor and a drying component, and the concentration detection range of the sulfur dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

[0040] Among them, sulfur dioxide electrochemical gas sensors are used to detect and measure the concentration of sulfur dioxide (SO2) in the environment.

[0041] In combination with the first aspect, in some implementations of the first aspect, the reference sensor 111 and the monitoring sensor both include a carbon dioxide electrochemical gas sensor and a drying component, and the concentration detection range of the carbon dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 5000 ppm.

[0042] Among them, carbon dioxide electrochemical gas sensors are used to detect and measure the concentration of carbon dioxide (CO2) in the environment.

[0043] Example 2 like Figure 2 As shown, the present invention provides a chimney external differential type ship exhaust emission online monitoring method, the ship includes a chimney, and the monitoring method is applied to the chimney external differential type ship exhaust emission online monitoring system provided in any of the above embodiments, comprising the following steps: Step S1, using a wind speed and wind direction monitoring unit to monitor the wind speed data and wind direction information at the chimney in real time; Step S2, using a receiving unit to obtain static information and dynamic information of the ship; Step S3, using an exhaust gas monitoring unit to monitor in real time to obtain reference concentration data and multiple monitoring concentration data of exhaust gas components of the ship; Step S4, using a data acquisition unit to obtain reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information; Step S5, using a data processing unit to average multiple monitoring concentration data to obtain average monitoring concentration data, and performing differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data. If the concentration change data is within a preset violation concentration data range, an alarm signal is generated, and the reference concentration data, multiple monitoring concentration data, wind speed data, wind direction information, static information and dynamic information are saved; Step S6, using the management unit to display and query reference concentration data, multiple monitoring concentration data, concentration change data, wind speed data, wind direction information, static information and dynamic information.

[0044] The monitoring method provided in the embodiment of the present invention corresponds one-to-one to the monitoring system provided in Example 1, and the technical effects produced are similar thereto, which improves monitoring efficiency, reduces monitoring costs, and enhances the stability and accuracy of concentration data.

[0045] The present invention also provides an electronic device, which includes a processor and a memory for storing instructions executable by the processor; wherein the processor is used to execute the chimney external differential type ship exhaust emission online monitoring method provided in the above embodiment.

[0046] The present invention also provides a computer-readable storage medium, which stores a computer program, and the computer program is used to execute the chimney external differential type ship exhaust emission online monitoring method provided in the above embodiment.

[0047] The computer readable storage medium can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can include, for example, but is not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A chimney external differential ship exhaust emission online monitoring system, wherein the ship includes a chimney, characterized in that: The monitoring system comprises: An exhaust gas monitoring unit, comprising a reference sensor and a plurality of monitoring sensors, wherein the reference sensor is located at an upwind point of the chimney, and a plurality of monitoring sensors are located at other points of the chimney except the upwind point, wherein the reference sensor monitors in real time to obtain reference concentration data of the exhaust gas components of the ship, and the monitoring sensor monitors in real time to obtain monitoring concentration data of the exhaust gas components of the ship; A wind speed and direction monitoring unit, used for real-time monitoring of wind speed data and wind direction information at the chimney; A receiving unit, used for acquiring static information and dynamic information of the ship; A data acquisition unit connected to the exhaust gas monitoring unit, the wind speed and wind direction monitoring unit, and the receiving unit, and used to obtain the reference concentration data, a plurality of the monitoring concentration data, the wind speed data, the wind direction information, the static information, and the dynamic information; a data processing unit connected to the data acquisition unit, the data processing unit averaging the plurality of monitoring concentration data to obtain average monitoring concentration data, performing differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data, generating an alarm signal if the concentration change data is within a preset violation concentration data range, and saving the reference concentration data, the plurality of monitoring concentration data, the wind speed data, the wind direction information, the static information, and the dynamic information; A management unit is connected to the data processing unit and is used to display and query the reference concentration data, a plurality of monitoring concentration data, the concentration change data, the wind speed data, the wind direction information, the static information and the dynamic information.

2. The monitoring system according to claim 1, characterized in that: The multiple monitoring sensors include a first monitoring sensor, a second monitoring sensor and a third monitoring sensor, wherein the first monitoring sensor is located at a downwind point of the chimney, the second monitoring sensor is located at a first side wind point of the chimney, and the third monitoring sensor is located at a second side wind point of the chimney, wherein the first side wind point and the second side wind point are located on opposite sides of the chimney.

3. The monitoring system according to claim 1, characterized in that: The multiple monitoring sensors include a first monitoring sensor, a second monitoring sensor and a third monitoring sensor. The first monitoring sensor is located at a downwind point of the chimney, the second monitoring sensor and the third monitoring sensor are located on opposite sides of the chimney, and the line connecting the reference sensor and the first monitoring sensor is perpendicular to the line connecting the second monitoring sensor and the third monitoring sensor.

4. The monitoring system according to claim 3, characterized in that: The connecting line between the second monitoring sensor and the third monitoring sensor passes through the axis of the chimney.

5. The monitoring system according to claim 1, characterized in that: The reference sensor and the monitoring sensor both include a nitrogen oxide electrochemical gas sensor and a drying component, wherein the nitrogen oxide electrochemical gas sensor includes a nitric oxide electrochemical gas sensor and a nitrogen dioxide electrochemical gas sensor, the concentration detection range of the nitric oxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 25 ppm; the concentration detection range of the nitrogen dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

6. The monitoring system according to claim 1, characterized in that: The reference sensor and the monitoring sensor both include a sulfur dioxide electrochemical gas sensor and a drying component. The concentration detection range of the sulfur dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 20 ppm.

7. The monitoring system according to claim 1, characterized in that: The reference sensor and the monitoring sensor both include a carbon dioxide electrochemical gas sensor and a drying component. The concentration detection range of the carbon dioxide electrochemical gas sensor is greater than or equal to 0 ppm and less than or equal to 5000 ppm.

8. A chimney external differential type ship exhaust emission online monitoring method, the ship includes a chimney, characterized in that: The monitoring method is applied to the chimney external differential ship exhaust emission online monitoring system according to any one of claims 1 to 7, comprising the following steps: Step S1, using a wind speed and wind direction monitoring unit to monitor the wind speed data and wind direction information at the chimney in real time; Step S2, using a receiving unit to obtain static information and dynamic information of the ship; Step S3, using an exhaust gas monitoring unit to monitor in real time to obtain reference concentration data and multiple monitoring concentration data of the exhaust gas components of the ship; Step S4, using a data acquisition unit to acquire the reference concentration data, a plurality of the monitoring concentration data, the wind speed data, the wind direction information, the static information and the dynamic information; Step S5, using a data processing unit to average the plurality of monitoring concentration data to obtain average monitoring concentration data, and performing differential processing on the average monitoring concentration data and the reference concentration data to obtain concentration change data, if the concentration change data is within a preset violation concentration data range, an alarm signal is generated, and the reference concentration data, the plurality of monitoring concentration data, the wind speed data, the wind direction information, the static information and the dynamic information are saved; Step S6, using a management unit to display and query the reference concentration data, the plurality of monitoring concentration data, the concentration change data, the wind speed data, the wind direction information, the static information and the dynamic information.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to execute the chimney external differential type ship exhaust emission online monitoring method as described in claim 8 above.

10. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; Wherein, the processor is used to execute the chimney external differential type ship exhaust emission online monitoring method as described in claim 8 above.

Images