Salinity on-line monitoring device and method for air containing salt mist

Abstract

The invention belongs to the technical field of marine environment monitoring, and relates to an online salinity monitoring device and method for salt mist-containing air, and the device comprises a hollow cylindrical shell, one end of the hollow cylindrical shell is provided with an air supply module, the other end of the hollow cylindrical shell is internally provided with a filter, and a salt mist generator is arranged between the filter and the air supply module; the air supply module is used for providing airflow towards the filter into the hollow cylindrical shell, the salt mist generator is used for inputting salt mist into the hollow cylindrical shell and enabling the salt mist to flow to the filter along with the airflow, and the filter is used for filtering the salt mist in the airflow; a first salt mist absorption detection device and a second salt mist absorption detection device are arranged on the two sides of the filter respectively and are used for detecting the salinity in the air ducts on the two sides of the filter respectively. According to the application, the salinity in the air can be monitored on line, so that the influence effect of the filter on the salt mist concentration is judged.

Description

Technical Field

[0001] The present application belongs to the technical field of marine environment monitoring, and more specifically, relates to an online monitoring device and method for the salinity of salt-mist-containing air. Background Art

[0002] Salt mist in the marine environment can cause filters in marine equipment to fail. More seriously, if the filter is not effective in separating salt mist, downstream key metal equipment will be prone to salt mist corrosion when used in an environment containing salt mist, resulting in performance degradation, shortened lifespan, and even threats to the property and life safety of direct or indirect users.

[0003] Currently, existing methods for measuring salt content in salt spray include titration, potentiometric titration, ion-selective electrode methods, and spectrophotometry. These methods involve sampling at a test site, then sending samples to a laboratory for weighing, dissolution, and extraction, and then measuring the chloride ion content using other methods. These testing methods are time-consuming, and the test data is easily affected by the natural environment. Therefore, online monitoring technology is gaining increasing attention.

[0004] Research has shown that due to the lack of efficient online detection methods, systematic research on the failure patterns of filter elements in salt spray conditions is still unavailable. Existing detection methods primarily draw on those used for inertial separators, comparing salt spray separation performance through upstream and downstream sampling. These methods have the following main drawbacks: 1) Testing is limited, allowing only static comparisons of separation performance, not dynamic monitoring of component lifespan and failure patterns over the entire lifecycle, making it difficult to study the fiber's adsorption and separation characteristics for salt spray; 2) The experimental process is lengthy and cumbersome, making the results susceptible to environmental contamination. Therefore, rapid online monitoring of salinity in air containing salt spray remains a major technical challenge. Summary of the Invention

[0005] In response to the defects of the existing technology, the purpose of this application is to provide an online monitoring device and method for the salinity of salt-containing air, aiming to solve the problem that the salinity in salt-containing air cannot be quickly monitored online, resulting in the inability to determine the failure pattern of the filter element in salt fog conditions.

[0006] To achieve the above-mentioned objectives, in a first aspect, the present application provides an online monitoring device for the salinity of air containing salt mist, comprising a hollow cylindrical shell, an air supply module being provided at one end of the hollow cylindrical shell, and a filter being provided inside the other end thereof, a salt mist generator being provided between the filter and the air supply module, the air supply module being used to provide an airflow toward the filter into the hollow cylindrical shell, the salt mist generator being used to input salt mist into the hollow cylindrical shell and flowing toward the filter with the airflow, and the filter being used to filter the salt mist in the airflow; a salt mist absorption detection device and a second salt mist absorption detection device being respectively provided on both sides of the filter, the first salt mist absorption detection device and the second salt mist absorption detection device being used to detect the salinity in the air ducts on both sides of the filter, respectively.

[0007] Furthermore, the first salt spray absorption detection device includes a sampling tube, a sampling bottle, a stabilizing liquid bottle, a vacuum pump and a salt spray measurement module, wherein: the sampling bottle and the stabilizing liquid bottle are both sealed bottles; the sampling tube includes a first pipe mouth and a second pipe mouth, the first pipe mouth is located in a hollow cylindrical shell, and its orientation is perpendicular to the airflow direction; the second pipe mouth is located in the sampling bottle and immersed in the absorption liquid therein, and a microbubble generating unit is provided on it; the vacuum pump is provided on the sampling bottle, for extracting the gas in the sampling bottle, so that the salt spray enters the sampling bottle under the action of air pressure, and is mixed with the absorption liquid through the microbubble generating unit to form a mixed liquid; a circulation pump is provided in the stabilizing liquid bottle, and the liquid inlet end of the circulation pipe of the circulation pump is provided in the sampling bottle; the salt spray measurement module is provided in the stabilizing liquid bottle.

[0008] Furthermore, the salt spray measurement module is a conductivity probe, and a salinity meter is provided outside the stabilizing liquid bottle. The conductivity probe is connected to the salinity meter to transmit the detected salinity to the salinity meter.

[0009] Furthermore, a valve and an anemometer are provided on the tube body of the sampling tube located outside the sampling bottle, and the anemometer is located between the valve and the sampling bottle.

[0010] Furthermore, the air supply module includes a motor, a fan and a frequency converter, the fan is arranged on an opening at one end of the hollow cylindrical shell, the motor is connected to the fan, and the frequency converter is arranged on the outside of the hollow cylindrical shell and connected to the fan for adjusting the wind force of the fan.

[0011] Furthermore, the first salt mist absorption detection device and the second salt mist absorption detection device have the same structure.

[0012] Furthermore, a visible area is provided on the shell of the hollow cylindrical shell where the salt spray generator is located; and / or a wire mesh separator is provided at the bottle mouth of the sampling bottle.

[0013] According to a second aspect of the present application, there is also disclosed a method for online detection of salinity in air using the device as described in any one of the preceding items, comprising: S1 calibrates the vacuum degree of the first salt spray absorption detection device and the second salt spray absorption detection device; S2 controls the air supply module to supply air flow into the hollow cylindrical shell; S3 controls the salt mist generator to input salt mist into the hollow cylindrical housing so that the salt mist is carried to the filter by the airflow; S4 controls the first salt mist absorption detection device and the second salt mist absorption detection device to respectively detect the salinity on both sides of the filter at the same time.

[0014] Furthermore, in step S2, the frequency converter is controlled to adjust the speed of the fan to 3000 Hz.

[0015] Furthermore, in step S4, after the salt mist continues to flow with the airflow for at least 5 minutes, the salinity on both sides of the filter is detected, and the corresponding anemometer is turned on to detect the corresponding wind speed. The wind speed is then used to calculate the total amount of salt corresponding to the first salt mist absorption detection device and the second salt mist absorption detection device, and the total amount of salt and the salinity are used to calculate the absorption efficiency of the salinity.

[0016] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0017] In general, the above technical solutions conceived by this application have the following beneficial effects compared with the existing technologies: (1) The device of this application is simple and easy to operate. It uses salt mist in the air as the main monitoring object. The method for forming the salt mist gas environment before and after the filter is simple. It can monitor the salinity before and after the filter in real time, and can obtain the changes in the salt mist content on both sides of the filter at different times in real time. The test data cycle is short and the speed is fast. In addition, the overall device has a high degree of integration, a simple structure, is easy to carry, and has a wide range of application scenarios.

[0018] (2) This application uses a conductivity probe to measure chloride ions. The presence of gaseous components in the absorption liquid greatly optimizes the test accuracy of the conductivity probe. In addition, by setting up a stabilizing liquid bottle and adopting a parent-child double circulation system with volume-constrained instantaneous stable fluid domain method, the stability of the detection environment is guaranteed, thereby ensuring the detection accuracy.

[0019] (3) This application designs a microbubble generating unit, and utilizes the microbubble device to realize the technology of fully mixing gas and liquid. Through the microbubble treatment of the induced air, the surface modification of the gas-liquid interface, and the guided jet at the gas-liquid junction, the air flow mixed with salt mist has better water dispersibility and a larger specific surface area, so as to achieve full mixing with the absorption liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of an online monitoring device for salinity of salt mist air provided in an embodiment of the present application; Figure 2 Schematic diagram of the structure of the salt spray absorption monitoring device provided in the embodiment of the present application; Figure 3 This is a flow chart of a method for online monitoring of salinity in air provided in an embodiment of the present application.

[0021] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1-motor; 2-fan; 3-frequency converter; 4-visible area; 5-salt spray generator; 6-front air duct; 7-sampling tube; 8-second salt spray absorption detection device; 9-first salt spray absorption detection device, 91-valve, 92-anemometer, 93-draft duct, 94-sampling bottle, 95-microbubble generating unit, 96-circulating pump, 97-conductivity probe, 98-stabilizing liquid bottle, 99-electric stabilizing liquid plate, 910-wire mesh separator, 911-vacuum pump valve, 912-vacuum pump, 913-salinity meter; 10-filter; 11-hollow cylindrical shell; 12-rear air duct. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] The term "and / or" as used herein describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. The symbol " / " as used herein indicates that the related objects are in an "or" relationship, for example, A / B means either A or B.

[0024] The terms "first" and "second" in this specification and claims are used to distinguish different objects rather than to describe a specific order of objects. For example, "first response message" and "second response message" are used to distinguish different response messages rather than to describe a specific order of response messages.

[0025] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0026] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more, for example, multiple processing units means two or more processing units, etc.; multiple elements means two or more elements, etc.

[0027] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0028] This embodiment provides an online monitoring device for salinity of salt-containing air. Figure 1 As shown, the device includes 13, an air supply module is provided at one end of the hollow cylindrical shell 11, and a filter 10 is provided inside the other end thereof. The outer dimensions of the filter 10 are the same as the inner diameter of the hollow cylindrical shell 11 in which it is located; a salt mist generator 5 is provided between the filter 10 and the air supply module, and the air supply module is used to provide an airflow toward the filter 10 into the hollow cylindrical shell 11, and the salt mist generator 5 is used to input salt mist into the hollow cylindrical shell 11. The salt mist can flow to the filter 10 with the air flow, and the filter 10 is used to filter and intercept salt mist in the air containing salt mist; a first salt mist absorption detection device 9 and a second salt mist absorption detection device 8 are respectively provided in the front air duct 6 and the rear air duct 12 on both sides of the filter 10. The first salt mist absorption detection device 9 and the second salt mist absorption detection device 8 are used to absorb and detect the salinity in the air ducts on both sides of the filter 10, respectively, as a data basis for subsequent determination of the filtering capacity of the filter 10.

[0029] In this embodiment, the first salt mist absorption detection device 9 and the second salt mist absorption detection device 8 have the same structure.

[0030] In this embodiment, the first salt mist absorption detection device 9 includes a sampling tube 7, a sampling bottle 94, a stabilizing liquid bottle 98, a vacuum pump 912 and a salt mist measurement module.

[0031] The aforementioned sampling bottle 94 and stabilizing liquid bottle 98 are both sealed bottles with rubber stoppers at the bottle mouths, and the bottle mouth of the sampling bottle 94 is provided with a wire mesh separator 910 to prevent salt formed by the deposition of salt mist particles from entering the absorption liquid and affecting the detected salinity.

[0032] The aforementioned sampling tube 7 is an irregularly shaped curved tube, and the shape of the curved tube is any shape that matches and is installed with the sampling bottle and the hollow cylindrical shell 11. The curved tube includes a first pipe opening and a second pipe opening. The first pipe opening is inserted into the hollow cylindrical shell 11, and the pipe opening is oriented perpendicular to the direction of the airflow blown out by the fan; the second pipe opening is inserted into the sampling bottle 94 from the side wall of the sampling bottle 94, and a microbubble generating unit 95 is provided on the second pipe opening, which is used to microbubble the salt mist entering the sampling bottle 94 to better complete the gas-liquid mixing.

[0033] The aforementioned vacuum pump 912 is located outside the sampling bottle 94 and is connected to the sampling bottle 94 through a shutoff exhaust pipe. The exhaust pipe passes through the rubber stopper into the sampling bottle and is used to extract the gas in the liquid-free space in the upper part of the sampling bottle 94; specifically, a vacuum pump valve 911 is provided on the exhaust pipe to shut off the exhaust pipe. The vacuum pump 912 continuously exhausts air to make the interior of the sampling bottle 94 a vacuum state, and then the salt mist airflow in the hollow cylindrical shell 11 enters the sampling bottle 94 through the sampling tube 7 under the action of air pressure, and is microbubbled by the microbubble generating unit 95 to mix with the absorption liquid in the sampling bottle 94 to form a mixed liquid.

[0034] A circulation pump 96 is fixedly installed at the bottom of the aforementioned stabilizing liquid bottle 98. The liquid inlet end of the circulation pipe of the circulation pump 96 is passed through the sampling bottle 94 and immersed in the absorption liquid, and is used to absorb the gas-liquid mixture in the sampling bottle 94; a salt spray measurement module is also provided in the stabilizing liquid bottle 98, which is used to measure the salinity of the gas-liquid mixture in the sampling bottle 94 sucked in by the circulation pump 96.

[0035] The aforementioned salt spray measurement module is a conductivity probe 97. The detection end of the conductivity probe 97 is inserted through a rubber stopper into a stabilizing liquid bottle 98 and can be immersed in the mixed liquid. A salinity meter 913 is also provided outside the stabilizing liquid bottle 98, and the data transmission end of the conductivity probe 97 is connected to the salinity meter 913 through a wire for transmitting the detected salinity data to the salinity meter 913 for display.

[0036] The aforementioned sampling tube 7 is also provided with a valve 91 and an anemometer 92 on the tube body outside the sampling bottle 94. The anemometer 92 is located on the tube body between the valve 91 and the sampling bottle 94. During the detection process, the opening and closing size of the valve 91 can be adjusted according to the wind speed value of the anemometer 92 to achieve controllable detection of salinity value.

[0037] An electric stabilizing plate 99 is also fixed at the bottle mouth of the stabilizing liquid bottle 98, which is used to keep the height of the absorption liquid in the stabilizing liquid bottle 98 consistent during the absorption liquid circulation process; the stabilizing liquid bottle 98 is connected to the sampling bottle 94 through a water pipe, and the absorption liquid in the stabilizing liquid bottle 98 can enter the sampling bottle 94 through the water pipe, so that the absorption liquid can be recycled.

[0038] The air supply module comprises a motor 1, a fan 2, and an inverter 3. The fan 2 is fixed to one end of the hollow cylindrical housing 11, with the air outlet facing the center of the hollow cylindrical housing 11. The motor 1 is connected to the fan 2 to provide power. The inverter 3 is fixed to the outer shell of the hollow cylindrical housing 11 and connected to the fan 2 to adjust the wind speed of the fan 2.

[0039] Since the first salt mist absorption detection device 9 and the second salt mist absorption detection device 8 have the same structure, the specific composition structure of the second salt mist absorption detection device 8 will not be described in detail here.

[0040] In this embodiment, the hollow cylindrical housing 11 housing the salt mist generator 5 is further provided with a visible area 4. Specifically, the visible area 4 can be a small transparent area on the housing housing the salt mist generator 5, or the entire housing housing can be transparent. Specifically, the housing housing housing the salt mist generator 5 is designed to be fully transparent, such as by using acrylic material to manufacture the housing, thereby enabling real-time observation of the salt mist airflow.

[0041] The following describes the online monitoring device for salinity in salt-containing mist air provided by the present application. The online monitoring device for salinity in salt-containing mist air described below and the method for online detection of salinity in air described above can be referenced to each other.

[0042] The method for online monitoring of salinity in salt-containing air provided in this embodiment is as follows: Figure 3 As shown, the following steps are included: After receiving the test signal, S1 first controls the circulation pump 96 and the vacuum pump 912 in the first salt mist absorption detection device 9 and the second salt mist absorption detection device 8 to start calibration so that the vacuum degree of the first salt mist absorption detection device 9 and the second salt mist absorption detection device 8 are consistent; S2 controls the air supply module to supply air into the hollow cylindrical housing 11; specifically, the motor 1 is turned on, the inverter 3 is adjusted to adjust the speed of the fan 2 to 3000 Hz, and the air flow is continuously supplied to the hollow cylindrical housing 11 at this speed; S3 controls the salt mist generator to input salt mist into the hollow cylindrical housing 11 so that the salt mist is blown into the filter 10 by the air flow; S4 uses the first salt mist absorption detection device and the second salt mist absorption detection device to respectively detect the salinity on both sides of the filter 10 at the same time, and also uses the corresponding anemometers 92 in the first salt mist absorption detection device and the second salt mist absorption detection device to detect the corresponding wind speed.

[0043] Specifically, each salt mist absorption detection device utilizes the same detection principle. For example, the first salt mist absorption detection device operates as follows: after salt mist continuously enters the filter 10 with the airflow for at least 5 minutes, an external controller opens the corresponding valve 91 on the first salt mist absorption detection device, directing the salt mist flow through an induction pipe 93 (i.e., the pipe between the sampling tube 7 and the sampling bottle 94) into the corresponding sampling bottle 94 for microbubble treatment. Simultaneously, a circulation pump 96 circulates the gas-liquid mixture from the sampling bottle 94 into the corresponding stabilizing bottle 98. During the blowing and circulation process, the anemometer 92 is activated to measure the corresponding wind speed. This wind speed is then used to calculate the total amount of salt mist entering the first and second salt mist absorption detection devices. An electric stabilizing plate 99 presses down the liquid level to maintain a stable level in the stabilizing bottle 98. Simultaneously, a conductivity probe 97 measures the salinity in the stabilizing bottle 98 and transmits the information to a salinometer 913 for measurement. After multiple tests, the measured data serves as the basis for determining filter performance. The salt mist absorption efficiency can also be calculated by comparing the total amount of salt mist with the salinity of the air containing the salt mist. The method for calculating salt mist absorption efficiency is conventional in the field and will not be detailed here. Throughout the monitoring process, the vacuum level, and therefore the salt mist intake rate, is controlled by adjusting the vacuum valve.

[0044] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components, or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0045] In addition, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0046] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. "Sliding connection" means that the two are connected to each other and can slide relative to each other after the connection. The directional terms mentioned in the embodiments of the present application, such as "top", "bottom", "inside", "outside", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0047] In addition, in the embodiments of the present application, the mathematical concepts mentioned include symmetry, equality, parallelism, and perpendicularity. These limitations are all for the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and it is possible to be approximately symmetric, approximately equal, approximately parallel, or approximately perpendicular. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0048] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An online monitoring device for salinity of salt-containing air, characterized in that: The invention comprises a hollow cylindrical shell (11), wherein an air supply module is provided at one end of the hollow cylindrical shell (11), and a filter (10) is provided inside the other end thereof; a salt mist generator (5) is provided between the filter (10) and the air supply module; the air supply module is used to provide an airflow toward the filter (10) into the hollow cylindrical shell (11); the salt mist generator (5) is used to input salt mist into the hollow cylindrical shell (11) and flow toward the filter (10) along with the airflow; the filter (10) is used to filter salt mist particles; a first salt mist absorption detection device (9) and a second salt mist absorption detection device (8) are respectively provided on both sides of the filter (10); the first salt mist absorption detection device (9) and the second salt mist absorption detection device (8) are respectively used to detect the salinity in the air ducts on both sides of the filter (10).

2. The on-line monitoring device for salinity of salt-mist air according to claim 1, wherein: The first salt spray absorption detection device (9) comprises a sampling tube (7), a sampling bottle (94), a stabilizing liquid bottle (98), a vacuum pump (912) and a salt spray measurement module, wherein: the sampling bottle (94) and the stabilizing liquid bottle (99) are both sealed bottles; the sampling tube (7) comprises a first pipe opening and a second pipe opening, the first pipe opening is located in the hollow cylindrical shell (11) and is oriented perpendicular to the airflow direction; the second pipe opening is located in the sampling bottle (94) and immersed in the absorption liquid therein, and is provided with a micro- The vacuum pump (912) is connected to the sampling bottle (94) through a pipeline, and is used to extract the gas in the sampling bottle (94), so that the salt mist enters the sampling bottle (94) under the action of air pressure and is mixed with the absorption liquid through the microbubble generating unit (95) to form a mixed liquid; a circulation pump (96) is provided in the stabilizing liquid bottle (98), and the liquid inlet end of the circulation pipeline of the circulation pump (96) is provided in the sampling bottle (94); the salt mist measurement module is provided in the stabilizing liquid bottle (98).

3. The on-line monitoring device for salinity of salt-mist air according to claim 2, wherein: The salt spray measurement module is a conductivity probe (97), and a salinity meter (913) is further provided outside the stabilizing liquid bottle (98). The conductivity probe (97) is connected to the salinity meter (913) and is used to transmit the detected salinity to the salinity meter (913).

4. The on-line monitoring device for salinity of salt-mist air according to claim 2, wherein: The sampling tube (7) is provided with a valve (91) and an anemometer (92) on the tube body outside the sampling bottle (94), and the anemometer (92) is located between the valve (91) and the sampling bottle (94).

5. The online monitoring device for salinity of salt-containing air according to claim 2, wherein: The air supply module comprises a motor (1), a fan (2) and a frequency converter (3); the fan (2) is arranged on an opening at one end of a hollow cylindrical shell (11), and the motor (1) is connected to the fan (2); the frequency converter (3) is arranged on the outside of the hollow cylindrical shell (11) and is connected to the fan (2) for adjusting the wind force of the fan (2).

6. The on-line monitoring device for salinity of salt-mist air according to claim 1, wherein: The first salt mist absorption detection device (9) and the second salt mist absorption detection device (8) have the same structure.

7. The online monitoring device for salinity of salt-mist air according to claim 1, wherein: A visible area (4) is provided on the shell of the hollow cylindrical housing (11) where the salt mist generator (5) is located; and / or a wire mesh separator (910) is provided at the bottle mouth of the sampling bottle (94).

8. A method for online detection of salinity in air using the device according to any one of claims 1 to 7, characterized in that: include: S1 calibrates the vacuum degree of the first salt mist absorption detection device (9) and the second salt mist absorption detection device (8); S2 controls the air supply module to supply airflow into the hollow cylindrical housing (11); S3 controls the salt mist generator (5) to input salt mist into the hollow cylindrical housing (11), so that the salt mist is carried to the filter (10) by the airflow; S4 controls the first salt mist absorption detection device (9) and the second salt mist absorption detection device (8) to respectively detect the salinity on both sides of the filter (10) at the same time.

9. The method according to claim 8, wherein In step S2, the frequency converter (3) is controlled to adjust the rotation speed of the fan (2) to 3000 Hz.

10. The method according to claim 8, wherein In step S4, after the salt mist continues to flow with the airflow for at least 5 minutes, the salinity on both sides of the filter (10) is detected, and the corresponding anemometer (92) is turned on to detect the corresponding wind speed; then, the wind speed is used to calculate the total amount of salt entering the first salt mist absorption detection device (9) and the second salt mist absorption detection device (8), and the absorption efficiency of the salinity is calculated using the total amount of salt and the salinity.

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