Marine solution concentration measurement system and ship

Abstract

This invention provides a marine solution concentration measurement system, comprising: a storage container for storing a solution; a differential pressure detection device disposed on the storage container; the differential pressure detection device includes a first pressure probe and a second pressure probe, both disposed within the storage container, with the first pressure probe located directly above the second pressure probe; a pitch sensor for detecting the pitch angle α of the storage container; a roll sensor for detecting the roll angle β of the storage container; and a data processing module electrically connected to the differential pressure detection device, the pitch sensor, and the roll sensor. This invention also provides a ship.

Description

Technical Field

[0001] This utility model relates to the field of marine technology, and in particular to a marine solution concentration measurement system and a ship. Background Technology

[0002] With the greenhouse effect worsening, a global surge in carbon reduction has emerged. In the shipbuilding industry, clean energy is rapidly developing and will gradually replace fossil fuels as the primary energy source for future ships. Ammonia, as an readily available and easily stored chemical, produces no carbon emissions during combustion, making it increasingly popular in the marine fuel industry and one of the most promising clean fuels for ships. Consequently, the shipbuilding industry is gradually increasing its research efforts on ammonia fuel. When ammonia is used as fuel, it inevitably produces a certain amount of waste gas. Currently, water is generally used to absorb the ammonia gas, forming ammonia water to prevent leakage. This process requires precise control of the ammonia water concentration.

[0003] Vibrational concentration meters and differential pressure concentration meters are two commonly used types of concentration meters. Vibrational concentration meters determine the density of a liquid by measuring the vibration frequency of a vibrating element within the liquid, thus obtaining the liquid's concentration. However, the components of vibrational concentration meters are relatively precise and complex, making them prone to damage, and their procurement cost is high. Differential pressure concentration meters determine the density of a liquid by measuring the pressure difference at different heights, thus obtaining the liquid's concentration. However, when used on ships, the actual height of the differential pressure concentration meter's probe cannot be accurately measured due to the ship's pitching and rolling motion during navigation, resulting in inaccurate concentration readings. Therefore, conventional differential pressure concentration meters cannot function properly on ships. Utility Model Content

[0004] The purpose of this invention is to provide a marine solution concentration measurement system that can accurately measure the concentration of a solution, and is highly reliable and low in cost.

[0005] This utility model provides a marine solution concentration measurement system, comprising:

[0006] Liquid storage container, used to store solutions;

[0007] A differential pressure detection device is installed on the liquid storage container; the differential pressure detection device includes a first pressure probe and a second pressure probe, both of which are installed inside the liquid storage container, with the first pressure probe located directly above the second pressure probe;

[0008] A tilt sensor is used to detect the tilt angle α of the liquid storage container;

[0009] A roll sensor is used to detect the roll angle β of the liquid storage container;

[0010] The data processing module is electrically connected to the differential pressure detection device, the tilt sensor, and the roll sensor, respectively. The data processing module is used to calculate the actual height difference H between the first and second pressure probes based on the initial installation height difference h between the first and second pressure probes, the tilt angle α detected by the tilt sensor, and the roll angle β detected by the roll sensor. It also calculates the concentration of the solution based on the differential pressure value ΔP between the second and first pressure probes and the actual height difference H.

[0011] Furthermore, the initial installation height difference h between the first pressure probe and the second pressure probe is 0.5 meters to 2 meters.

[0012] Furthermore, the differential pressure detection device includes a differential pressure sensor, with the first pressure probe and the second pressure probe being two pressure probes of the differential pressure sensor, respectively; the data processing module is electrically connected to the differential pressure sensor.

[0013] Furthermore, the differential pressure detection device includes a first pressure sensor and a second pressure sensor, the first pressure probe being the pressure probe of the first pressure sensor, and the second pressure probe being the pressure probe of the second pressure sensor; the data processing module is electrically connected to the first pressure sensor and the second pressure sensor respectively.

[0014] Furthermore, the liquid storage container is equipped with a temperature sensor, which is used to detect the temperature of the solution. The data processing module is electrically connected to the temperature sensor. The data processing module is used to calculate the concentration of the solution based on the pressure difference value ΔP, the actual height difference H, and the temperature value detected by the temperature sensor.

[0015] Furthermore, both the tilt sensor and the roll sensor are mounted on the liquid storage container.

[0016] Furthermore, the marine solution concentration measurement system also includes a support frame, on which the liquid storage container is fixedly mounted, and on which both the pitch sensor and the roll sensor are mounted.

[0017] Furthermore, the storage container is an ammonia storage tank, which is used to store ammonia.

[0018] Furthermore, the marine solution concentration measurement system also includes a display device, which is electrically connected to the data processing module and is used to display the solution concentration value calculated by the data processing module.

[0019] This invention also provides a ship, including the marine solution concentration measurement system described above.

[0020] This invention provides a marine solution concentration measurement system that uses a pitch sensor and a roll sensor to detect the pitch angle α and roll angle β of a storage container. When the storage container tilts during ship navigation, the measured pitch angle α and roll angle β are used to correct the initial installation height difference h between the first and second pressure probes, obtaining the actual height difference H. The solution concentration is then calculated based on the pressure difference ΔP between the second and first pressure probes and the actual height difference H. This marine solution concentration measurement system can correct for the probe height difference when the storage container tilts and rolls, thus accurately measuring the solution concentration. It is suitable for ships and, compared to vibratory concentration meters, has a simpler structure, no complex vibration components, higher reliability, easier maintenance, and lower cost. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the liquid storage container in an embodiment of the present invention when it is not tilted.

[0022] Figure 2 for Figure 1 A schematic diagram showing the relative positions of the first and second pressure probes.

[0023] Figure 3 This is a schematic diagram of the liquid storage container in an embodiment of the present invention when it tilts longitudinally.

[0024] Figure 4 for Figure 3 A schematic diagram showing the relative positions of the first and second pressure probes.

[0025] Figure 5 This is a schematic diagram of the liquid storage container in an embodiment of the present invention when it is rocked.

[0026] Figure 6 for Figure 5 A schematic diagram showing the relative positions of the first and second pressure probes.

[0027] Figure 7 This is a schematic diagram showing the electrical signal connection between the data processing module and other components in an embodiment of this utility model.

[0028] Figure 8 This is a schematic diagram of the liquid storage container in another embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the liquid storage container in another embodiment of the present invention. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0032] like Figures 1 to 7 As shown, this utility model embodiment provides a marine solution concentration measurement system 1, comprising:

[0033] Storage container 1, used for storing solutions;

[0034] A differential pressure detection device 2 is fixedly mounted on a liquid storage container 1. The differential pressure detection device 2 includes a first pressure probe 201 and a second pressure probe 202. Both the first pressure probe 201 and the second pressure probe 202 are disposed within the liquid storage container 1, and both are located below the liquid surface, with the first pressure probe 201 directly above the second pressure probe 202 (e.g., ...). Figure 1 and Figure 2 As shown, when the liquid storage container 1 does not tilt or roll, the first pressure probe 201 and the second pressure probe 202 are on the same vertical line, and the initial installation height difference between the first pressure probe 201 and the second pressure probe 202 is h); wherein, the hydraulic value measured by the second pressure probe 202 is the first hydraulic value, the hydraulic value measured by the first pressure probe 201 is the second hydraulic value, and the pressure difference between the second pressure probe 202 and the first pressure probe 201 is ΔP = first hydraulic value - second hydraulic value;

[0035] Tilting sensor 3 is used to detect the tilt angle α of liquid storage container 1, where 0°≤α<90°;

[0036] The roll sensor 4 is used to detect the roll angle β of the liquid storage container 1, where 0°≤β<90°;

[0037] The data processing module 5 is electrically connected to the differential pressure detection device 2, the pitch sensor 3, and the roll sensor 4. The differential pressure detection device 2 transmits the differential pressure value ΔP between the second pressure probe 202 and the first pressure probe 201 to the data processing module 5 (or the differential pressure detection device 2 transmits the first hydraulic pressure value measured by the second pressure probe 202 and the second hydraulic pressure value measured by the first pressure probe 201 to the data processing module 5, and the data processing module 5 calculates the differential pressure value ΔP based on the first hydraulic pressure value and the second hydraulic pressure value). The pitch sensor 3 transmits the measured pitch angle α to the data processing module 5, and the roll sensor 4 transmits the measured roll angle β to the data processing module 5. The data processing module 5 is used to calculate the actual height difference H between the first pressure probe 201 and the second pressure probe 202 based on the initial installation height difference h (which is preset in the data processing module 5), the pitch angle α detected by the pitch sensor 3, and the roll angle β detected by the roll sensor 4, and to calculate the concentration of the solution based on the pressure difference ΔP between the second pressure probe 202 and the first pressure probe 201 and the actual height difference H.

[0038] Specifically, since the liquid storage container 1 is fixed to the ship, when the ship tilts (tows / rolls), the liquid storage container 1 will also tilt, and the relative positions of the first pressure probe 201 and the second pressure probe 202 will change. The liquid storage container 1 has two mutually perpendicular directions: forward / backward (X), left / right (Y), and vertical (Z). Figure 1 and Figure 2 As shown, when the liquid storage container 1 does not tilt or sway, the first pressure probe 201 is directly above the second pressure probe 202. At this time, the actual height difference H between the first pressure probe 201 and the second pressure probe 202 is equal to the initial installation height difference h. Figure 3 and Figure 4 As shown, when the liquid storage container 1 tilts longitudinally (tilting refers to the liquid storage container 1 tilting in the front-to-back direction X) but does not roll laterally (rolling refers to the liquid storage container 1 tilting in the left-to-right direction Y), the liquid storage container 1 has a tilt angle α (tilt angle α is the tilt angle of the liquid storage container 1 in the front-to-back direction X, that is, the angle between the line connecting the first pressure probe 201 and the second pressure probe 202 and the vertical direction Z). At this time, the actual height difference H between the first pressure probe 201 and the second pressure probe 202 is equal to the initial installation height difference h * cosα. Figure 5 and Figure 6As shown, when the liquid storage container 1 rolls horizontally but not vertically, it has a roll angle β (the roll angle β refers to the tilt angle of the liquid storage container 1 in the left-right direction Y, that is, the angle between the line connecting the first pressure probe 201 and the second pressure probe 202 and the vertical direction Z). At this time, the actual height difference H between the first pressure probe 201 and the second pressure probe 202 is equal to the initial installation height difference h * cosβ. When the liquid storage container 1 rolls and tilts simultaneously, it has a tilt angle α and a roll angle β. The actual height difference H between the first pressure probe 201 and the second pressure probe 202 is equal to the initial installation height difference h * cosα * cosβ. Since cosα = 1 when α = 0° and cosβ = 1 when β = 0°, the relationship between H and h can be unified as: H = h * cosα * cosβ.

[0039] After calculating H, the density ρ of the solution is calculated according to the liquid pressure formula: ΔP=ρ*g*H (g is the acceleration due to gravity). Then, the concentration of the solution can be obtained according to the data table on the relationship between density ρ and concentration (this data table is preset in data processing module 5).

[0040] The marine solution concentration measurement system provided in this embodiment of the invention detects the pitch angle α and roll angle β of the storage container 1 by setting a pitch sensor 3 and a roll sensor 4. When the storage container 1 tilts during ship navigation, the measured pitch angle α and roll angle β are used to correct the initial installation height difference h between the first pressure probe 201 and the second pressure probe 202 to obtain the actual height difference H. Then, the concentration of the solution is calculated based on the pressure difference ΔP between the second pressure probe 202 and the first pressure probe 201 and the actual height difference H. This marine solution concentration measurement system can correct for the probe height difference when the storage container 1 tilts and rolls, thereby accurately measuring the concentration of the solution. It is suitable for ships, and compared with vibratory concentration meters, it has a simple structure, no complex vibration components, high reliability, easy maintenance, and lower cost.

[0041] Furthermore, such as Figure 1 and Figure 7 As shown, in this embodiment, a temperature sensor 6 is provided on the liquid storage container 1. The temperature sensor 6 is used to detect the temperature of the solution inside the liquid storage container 1 (specifically, the temperature sensor 6 is disposed on the outer wall of the liquid storage container 1, and the temperature probe of the temperature sensor 6 extends into the liquid storage container 1). The data processing module 5 is electrically connected to the temperature sensor 6. The data processing module 5 is used to calculate the concentration of the solution based on the pressure difference value ΔP, the actual height difference H, and the temperature value of the solution detected by the temperature sensor 6.

[0042] Generally, the concentration of a solution changes with temperature; that is, the concentration of a solution differs at different temperatures and with different densities. After calculating the density ρ of the solution, the concentration can be obtained from the data table showing the relationship between density ρ, temperature, and concentration (this data table is pre-set in the data processing module 5). Of course, in other embodiments, when the solution is at a constant temperature (i.e., the temperature remains unchanged), or when the concentration of the solution changes little with temperature, the temperature sensor 6 may not be required.

[0043] Furthermore, in this embodiment, the initial installation height difference h between the first pressure probe 201 and the second pressure probe 202 is 0.5 meters to 2 meters, specifically h can be 1 meter. If the initial installation height difference h between the first pressure probe 201 and the second pressure probe 202 is too small, the accuracy of the measured ΔP will be affected due to the small pressure difference between the two.

[0044] Furthermore, such as Figure 1 As shown, in this embodiment, the differential pressure detection device 2 includes a differential pressure sensor 21, with a first pressure probe 201 and a second pressure probe 202 being the two pressure probes of the differential pressure sensor 21. The data processing module 5 is electrically connected to the differential pressure sensor 21, and the differential pressure sensor 21 transmits the differential pressure value ΔP between the second pressure probe 202 and the first pressure probe 201 to the data processing module 5. Specifically, the differential pressure sensor 21 includes a sensor body (not labeled in the figure), a first pressure probe 201, and a second pressure probe 202. The sensor body is fixed to the outer wall of the liquid storage container 1. Both the first pressure probe 201 and the second pressure probe 202 are electrically connected to the sensor body. The sensor body can calculate the differential pressure value ΔP based on the pressure values ​​measured by the first pressure probe 201 and the second pressure probe 202 (an analysis and calculation module is provided inside the sensor body). The data processing module 5 is electrically connected to the sensor body, and the sensor body transmits the calculated differential pressure value ΔP to the data processing module 5. For details on the specific structure and working principle of the differential pressure sensor 21, please refer to existing technologies (such as patents CN219694403U and CN216791486U), which will not be elaborated here.

[0045] like Figure 8As shown, in another embodiment, the differential pressure detection device 2 includes a first pressure sensor 22 and a second pressure sensor 23. The first pressure probe 201 is the pressure probe of the first pressure sensor 22, and the second pressure probe 202 is the pressure probe of the second pressure sensor 23. The data processing module 5 is electrically connected to the first pressure sensor 22 and the second pressure sensor 23 respectively. The second pressure sensor 23 transmits the first hydraulic value measured by the second pressure probe 202 to the data processing module 5, and the first pressure sensor 22 transmits the second hydraulic value measured by the first pressure probe 201 to the data processing module 5. The data processing module 5 calculates the differential pressure value ΔP based on the first hydraulic value and the second hydraulic value. Specifically, the first pressure sensor 22 includes a first main body (not labeled) and a first pressure probe 201. The first main body is fixed to the outer wall of the liquid storage container 1, and the first pressure probe 201 is electrically connected to the first main body. The second pressure sensor 23 includes a second main body (not labeled) and a second pressure probe 202. The second main body is fixed to the outer wall of the liquid storage container 1, and the second pressure probe 202 is electrically connected to the second main body. The data processing module 5 is electrically connected to both the first and second main bodies. The first and second main bodies transmit the second hydraulic pressure value measured by the first pressure probe 201 and the first hydraulic pressure value measured by the second pressure probe 202 to the data processing module 5, respectively. For the specific structure and working principle of the pressure sensors, please refer to the prior art, which will not be elaborated here.

[0046] Furthermore, such as Figure 1 As shown, in this embodiment, both the tilt sensor 3 and the roll sensor 4 are mounted on the liquid storage container 1, specifically fixed to the outer wall of the liquid storage container 1.

[0047] like Figure 9 As shown, in another embodiment, the marine solution concentration measurement system also includes a bracket 8. The liquid storage container 1 is fixedly mounted on the bracket 8, which can be fixed to the deck of the ship. That is, the liquid storage container 1 is fixed to the deck via the bracket 8. The pitch sensor 3 and the roll sensor 4 are both fixedly mounted on the bracket 8. When the ship pitches and / or rolls, the bracket 8 and the liquid storage container 1 tilt synchronously, and their tilt angles are the same. Of course, in other embodiments, the pitch sensor 3 and the roll sensor 4 can also be installed in other locations on the ship (in some ships, there are already pitch and roll sensors installed, so such ships can use the measurement data from the existing pitch and roll sensors without the need for additional installations).

[0048] Furthermore, such as Figure 7As shown, in this embodiment, the marine solution concentration measurement system further includes a display device 7, which is electrically connected to the data processing module 5. The display device 7 is used to display the solution concentration value calculated by the data processing module 5. Specifically, the display device 7 can be a display screen. In other embodiments, the display device 7 may not be provided, and instead the data processing module 5 may be connected to other control systems to control the opening and closing of actuators (e.g., valves, pumps, etc.) based on the measured solution concentration.

[0049] Furthermore, in this embodiment, the data processing module 5 and the display device 7 can be disposed on the outer wall of the liquid storage container 1, or in other locations (e.g., on the bracket 8). The differential pressure detection device 2, the tilt sensor 3, the roll sensor 4, the data processing module 5, the temperature sensor 6, and the display device 7 can be partially or fully integrated (i.e., integrated into one module / device), or they can be disposed separately. The data processing module 5 can specifically be a component with computing functions such as an arithmetic unit, an MCU (microcontroller unit), a PLC (programmable logic controller), or a computer. The tilt sensor 3 and the roll sensor 4 are both tilt sensors, which are widely used in various fields. For their specific structure and working principle, please refer to the prior art, which will not be elaborated here.

[0050] Furthermore, in this embodiment, the storage container 1 is an ammonia water storage tank, which is used to store ammonia water, i.e., the above solution is ammonia water. Of course, in other embodiments, the storage container 1 can also be other containers that require concentration detection (e.g., neutralizing agent storage tank, urea storage tank, etc.).

[0051] This utility model embodiment also provides a ship, including the above-described marine solution concentration measurement system.

[0052] The following example illustrates the working steps of this shipboard solution concentration measurement system:

[0053] The shipboard solution concentration measurement system includes a differential pressure detection device 2, a pitch sensor 3, a roll sensor 4, a data processing module 5, and a temperature sensor 6. The differential pressure detection device 2 is a differential pressure sensor 21. In the initial state (i.e., when the storage container 1 is neither pitching nor rolling), the installation height difference between the two pressure probes of the differential pressure sensor 21 is h. The storage container 1 is an ammonia storage tank, which stores ammonia.

[0054] During the ship's navigation, the differential pressure sensor 21 measures the differential pressure between the two pressure probes as ΔP, the pitch sensor 3 measures the pitch angle of the liquid storage container 1 as α, the roll sensor 4 measures the roll angle of the liquid storage container 1 as β, and the temperature sensor 6 measures the temperature of the ammonia water as T.

[0055] The height difference between the two pressure probes of the differential pressure sensor 21 is corrected by measuring α and β, i.e., H = h * cosα * cosβ, to obtain the actual height difference H.

[0056] Then, according to the pressure formula: ΔP=ρ*g*H, that is, ρ=ΔP / (g*H), the density ρ of ammonia water can be calculated.

[0057] Then, based on the density ρ and temperature T of ammonia water, the concentration data of ammonia water at different temperatures and densities can be obtained by referring to the concentration data table of ammonia water at different temperatures and densities.

[0058] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A marine solution concentration measurement system, characterized by, include: Liquid storage container, used to store solutions; A differential pressure detection device is installed on the liquid storage container; the differential pressure detection device includes a first pressure probe and a second pressure probe, both of which are installed inside the liquid storage container, with the first pressure probe located directly above the second pressure probe; A tilt sensor is used to detect the tilt angle α of the liquid storage container; A roll sensor is used to detect the roll angle β of the liquid storage container; The data processing module is electrically connected to the differential pressure detection device, the tilt sensor, and the roll sensor, respectively. The data processing module is used to calculate the actual height difference H between the first and second pressure probes based on the initial installation height difference h between the first and second pressure probes, the tilt angle α detected by the tilt sensor, and the roll angle β detected by the roll sensor. It also calculates the concentration of the solution based on the differential pressure value ΔP between the second and first pressure probes and the actual height difference H.

2. The marine solution concentration measurement system of claim 1, wherein, The initial installation height difference h between the first pressure probe and the second pressure probe is 0.5 meters to 2 meters.

3. The marine solution concentration measurement system of claim 1, wherein, The differential pressure detection device includes a differential pressure sensor, with the first pressure probe and the second pressure probe being two pressure probes of the differential pressure sensor, respectively; the data processing module is electrically connected to the differential pressure sensor.

4. The marine solution concentration measurement system as described in claim 1, characterized in that, The differential pressure detection device includes a first pressure sensor and a second pressure sensor, wherein the first pressure probe is the pressure probe of the first pressure sensor and the second pressure probe is the pressure probe of the second pressure sensor; the data processing module is electrically connected to the first pressure sensor and the second pressure sensor respectively.

5. The marine solution concentration measurement system as described in claim 1, characterized in that, The liquid storage container is equipped with a temperature sensor, which is used to detect the temperature of the solution. The data processing module is electrically connected to the temperature sensor. The data processing module is used to calculate the concentration of the solution based on the pressure difference value ΔP, the actual height difference H, and the temperature value detected by the temperature sensor.

6. The marine solution concentration measurement system as described in claim 1, characterized in that, Both the tilt sensor and the roll sensor are mounted on the liquid storage container.

7. The marine solution concentration measurement system as described in claim 1, characterized in that, The marine solution concentration measurement system also includes a support frame, on which the liquid storage container is fixedly mounted, and on which both the pitch sensor and the roll sensor are mounted.

8. The marine solution concentration measurement system as described in claim 1, characterized in that, The storage container is an ammonia water storage tank, which is used to store ammonia water.

9. The marine solution concentration measurement system according to any one of claims 1-8, characterized in that, The marine solution concentration measurement system also includes a display device, which is electrically connected to the data processing module and is used to display the solution concentration value calculated by the data processing module.

10. A ship, characterized in that, Includes a marine solution concentration measurement system as described in any one of claims 1-9.

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