CN110687040B - Salt mist generator and salt mist generation method - Google Patents
Salt mist generator and salt mist generation method Download PDFInfo
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- CN110687040B CN110687040B CN201911044164.3A CN201911044164A CN110687040B CN 110687040 B CN110687040 B CN 110687040B CN 201911044164 A CN201911044164 A CN 201911044164A CN 110687040 B CN110687040 B CN 110687040B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
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Abstract
The invention provides a salt mist generator and a salt mist generating method, wherein the generator comprises a container with an air inlet and a mist outlet channel, an impeller driven by a power system is arranged in an inner cavity of the container, a reef structure is arranged in the inner cavity of the container and positioned at the periphery of the impeller, and part or all of the reef structure is exposed on the liquid level of a salt solution; the salt spray generation method comprises the following steps: injecting the prepared salt solution into the inner cavity of the salt fog generator to ensure that the surface of the salt solution is not higher than the middle part of the reef structure; starting a power system to enable the impeller and the fan in the inner cavity of the salt mist generator to rotate at the speed of 800 plus 1500 r/min; and placing a wire mesh filter with the aperture not larger than 2 mu m in a fog outlet channel of the salt fog generator, and introducing the salt fog screened by the wire mesh filter into a test box for later use. The concentration and the particle size of the salt spray generated by the invention are controllable, and are very close to the real concentration and the particle size of the salt spray in the marine atmospheric environment, so that the simulation degree of the salt spray entering a salt spray laboratory is high, and the accuracy of the salt spray test is improved.
Description
Technical Field
The invention relates to environmental test equipment, in particular to a salt spray generator and a salt spray generating method.
Background
With the deep implementation of the strong national strategy of ocean construction, a large amount of ocean engineering and ocean equipment are continuously constructed and put into use, and a large amount of engineering and equipment are exposed to the ocean atmospheric environment with high salt fog for a long time and face serious corrosion threats. In order to improve the service life and safety of engineering equipment in the marine atmospheric environment, protection and use research aiming at the marine high-salt fog environment needs to be deeply developed.
In the marine atmospheric environment, salt mist not only accelerates the corrosion of metal, but also causes damages such as the damage of a product surface protective film, the damage of electronic equipment, the increase of the conductivity of an insulating surface and the like. In order to assess the environmental adaptability of equipment and products in service in coastal regions, salt spray environment tests must be carried out.
At present, compressed air is generally utilized for salt spray tests of equipment productsSpray to produce high concentrations (> 100 mg/m) 3 ) And the large-droplet salt mist controls the settling rate of the salt mist to carry out a test. Because the large-particle-size salt mist is difficult to keep a suspension state and limited by the principle and the structure, the spraying mode can not accurately control the concentration of the salt mist and can not truly simulate the salt mist in the ocean atmosphere. In addition, document CN207325109U discloses a salt spray generator, which includes a housing and a support frame in the housing, wherein a salt feeding mechanism is arranged at the top of the housing, a fan is arranged on the side surface of the housing, the direction of the air flow output by the fan is inclined upward, a negative pressure type salt spray delivery pipe corresponding to the fan is horizontally arranged in the middle of the housing, a receiving groove is arranged below the negative pressure type salt spray delivery pipe, a disturbance impeller is arranged in the receiving groove, the disturbance impeller is driven by a first motor, the salt feeding mechanism and the receiving groove are connected through a vertically arranged salt feeding pipe, and the salt feeding pipe penetrates through the negative pressure type salt spray delivery pipe from top to bottom. Although the salt fog generator can atomize salt particles, the generated salt fog still has low similarity with the real salt fog of the marine atmospheric environment.
Disclosure of Invention
The invention aims to provide a salt mist generator to solve the problem that the similarity between salt mist generated by the existing salt mist generator and real salt mist in a marine atmospheric environment is not high.
In order to achieve the purpose, the invention adopts the following technical scheme.
A salt fog generator comprises a container with an air inlet and a fog outlet channel, wherein an impeller driven by a power system is arranged in an inner cavity of the container, a reef structure is arranged in the inner cavity of the container and positioned at the periphery of the impeller, and part or all of the reef structure is exposed on the liquid level of a salt solution.
Preferably, the reef structure can adopt natural sea reefs or artificial high-imitation reefs.
Preferably, the reef structure is circumferentially arranged on the inner wall of the container.
Preferably, the reef structures are arranged in a staggered manner in the circumferential direction.
In order to further improve the similarity between the salt mist generated by the salt mist generator and the real salt mist in the marine atmospheric environment, the air inlet is obliquely and downwards arranged on the side wall of the container, and the height from the air inlet to the liquid level of the salt solution is not less than 20 cm.
In order to control the concentration of the salt fog generated by the salt fog generator conveniently, a wire mesh filter is arranged in the fog outlet channel.
Preferably, the wire mesh filter uses a titanium alloy wire mesh having a pore size of not more than 2 μm.
In order to control the flow and concentration of the salt fog, a fan is arranged in the inner cavity of the container, and the position of the fan is about 10cm higher than that of the air inlet.
Preferably, the impeller and the fan are connected with the same output shaft of the power system.
The second objective of the present invention is to provide a method for generating salt fog, which has high similarity to the real salt fog in the marine atmosphere environment.
A salt spray generating method, comprising the steps of: injecting the salt solution prepared in proportion into the inner cavity of the salt fog generator to ensure that the surface of the salt solution is not higher than the middle part of the reef structure; starting a power system of the salt fog generator to enable the impeller and the fan in the inner cavity of the salt fog generator to rotate at the speed of 800 plus 1500 r/min; and placing a wire mesh filter with the aperture not larger than 2 mu m in a fog outlet channel of the salt fog generator, and introducing the salt fog screened by the wire mesh filter into a test box for later use.
Has the beneficial effects that: the invention forms strong 'sea waves' through the rotation simulation of the impeller, so that the 'sea waves' impact a reef structure at the periphery of the impeller, a large amount of bubbles and foams generated in the impact process are broken to form tiny salt water drops splashed around, and the tiny salt water drops are firstly screened by a wire mesh filter and then are discharged from a fog outlet channel in a foggy form; the salt mist generator has controllable concentration and particle size of the salt mist, and the concentration and particle size of the salt mist are very close to the real concentration and particle size of the salt mist in the marine atmospheric environment, so that the salt mist entering a salt mist test room has high simulation degree, and the accuracy of a salt mist test is improved; the salt fog generator can simulate the salt fog concentration in a natural state and can generate high-concentration salt fog; the salt spray generator is simple in structure, high in speed of simulating salt spray generation, simple in method of simulating salt spray generation, and better in safety performance compared with a mode of generating salt spray by high-pressure spraying.
Drawings
Fig. 1 is a schematic diagram of a salt spray generator of example 1.
Detailed Description
The present invention is further described with reference to the following specific embodiments, which should not be construed as limiting the scope of the present invention, and those skilled in the art can make some simple or principle equivalent substitutions or modifications according to the content of the present invention.
Example 1
A salt fog generator, as shown in figure 1, comprises a container 7 with an air inlet 1 and a fog outlet channel 2, an impeller 4 driven by a power system 6 is arranged in the inner cavity of the container 7, a reef structure 5 is arranged in the inner cavity of the container 7 and positioned at the periphery of the impeller 4, and part or all of the reef structure 5 is exposed at the liquid level of a salt solution. The impeller 4 can be replaced by an impeller similar to a washing machine or an impeller structure similar to a water turbine.
In a specific product, the reef structure 5 can adopt natural sea reef or artificial high imitation reef.
In this embodiment, the reef structures 5 are circumferentially arranged on the inner wall of the container 7, and the reef structures 5 are arranged in a staggered manner in the circumferential direction.
In a specific product, the air inlet 1 is obliquely arranged on the side wall of the container 7, and the height of the air inlet 1 from the liquid level of the saline solution is not less than 20 cm. In this embodiment, the height of the air inlet 1 from the liquid surface of the saline solution is 25 cm.
In a specific product, a wire mesh filter 8 is arranged in the mist outlet channel 2, and a titanium alloy wire mesh with the pore diameter not more than 2 mu m is adopted as the wire mesh filter 8.
In this embodiment, the fan 3 is disposed in the inner cavity of the container 7, and the position of the fan 3 is 10 ± 2cm higher than the air inlet 1.
In this embodiment, the power system 6 adopts a motor, the motor is located outside the container 7, an output shaft of the motor extends into an inner cavity of the container 7, the output shaft of the motor is simultaneously connected with the impeller 4 and the fan 3, and during operation, the impeller 4 and the fan 3 rotate synchronously.
Example 2
A salt spray generating method, comprising the steps of: injecting the salt solution prepared in proportion into the inner cavity of the salt fog generator in the embodiment 1 to ensure that the liquid level of the salt solution is not higher than the middle part of the reef structure 5; starting a power system 6 of the salt fog generator to enable the impeller 4 and the fan 3 in the inner cavity of the salt fog generator to rotate at the speed of 800-; a wire mesh filter 8 with the aperture not more than 2 mu m is arranged in a fog outlet channel 2 of the salt fog generator, and the salt fog screened by the wire mesh filter 8 is introduced into a test box for standby.
In the using process, the impeller 4 rotates to simulate and form strong 'sea waves', so that the 'sea waves' impact the reef structure 5 at the periphery of the impeller 4, a large number of bubbles and foams generated in the impacting process are broken to form tiny salt water drops splashed around (on one hand, the tiny salt water drops suspended in the gas are salt mist, on the other hand, the tiny salt water drops are evaporated to form tiny salt particles suspended in the gas and belong to the salt mist), and the tiny salt water drops are firstly screened by the wire mesh filter 8 and then discharged from the mist outlet channel in a mist form.
The concentration and the particle size of the salt mist generated by the salt mist generator can be controlled, and the method refers to the steps in example 2: preparing sodium chloride solution or sea salt solution with concentration of 3.5%, controlling impeller 4 and fan 3 to rotate at 800- 3 ±0.5mg/m 3 ~ 5mg/m 3 ±0.5mg/m 3 、 Salt fog with particle size less than 2 μm. The extreme salt fog concentration meeting the regulation of equipment in the interior of a common ship is 2mg/m 3 And the particle size of more than 95% of salt fog is less than 2 μm in the marine atmospheric environment. Therefore, in the embodiment, the concentration and the particle size of the salt fog generated by the salt fog generator are very close to those of the salt fog generated in the marine atmospheric environment, so that the salt fog entering a salt fog test room is high in simulation degree, and the accuracy of a salt fog test is improved.
The salt fog generator can simulate the salt fog concentration in a natural state and can generate high-concentration salt fog; the salt spray generator is simple in structure, high in speed of simulating salt spray generation, simple in method of simulating salt spray generation, and better in safety performance compared with a mode of generating salt spray by high-pressure spraying.
Claims (6)
1. A salt mist generator comprising a container (7) with an air inlet (1) and a mist outlet channel (2), characterized in that: the inner cavity of the container (7) is provided with an impeller (4) driven by a power system (6), a reef structure (5) is arranged in the inner cavity of the container (7) and positioned at the periphery of the impeller (4), part or all of the reef structure (5) is exposed on the liquid level of the saline solution, the reef structure (5) is annularly arranged on the inner wall of the container (7), and the reef structure (5) is arranged in a staggered manner in the height direction of the circumference; a wire mesh filter (8) is arranged in the mist outlet channel (2), and the wire mesh filter (8) adopts a titanium alloy wire mesh with the pore diameter not larger than 2 mu m.
2. The salt mist generator of claim 1, wherein: the reef structure (5) adopts natural sea reefs or artificial high imitation reefs.
3. The salt mist generator of claim 1 or 2, wherein: the air inlet (1) is obliquely and downwards arranged on the side wall of the container (7), and the distance between the air inlet (1) and the liquid level of the saline solution is not less than 20 cm.
4. The salt mist generator of claim 1, wherein: the inner cavity of the container (7) is provided with a fan (3), and the position of the fan (3) is 10cm higher than that of the air inlet (1).
5. The salt mist generator of claim 4, wherein: the impeller (4) and the fan (3) are connected with the same output shaft of the power system (6).
6. A salt spray generating method using the salt spray generator of claim 1 or 2, comprising the steps of: injecting a salt solution prepared in proportion into the inner cavity of the salt fog generator to ensure that the liquid level of the salt solution is not higher than the middle part of the reef structure (5); starting a power system (6) of the salt fog generator to enable the impeller (4) and the fan (3) in the inner cavity of the salt fog generator to rotate at the speed of 800-; and a wire mesh filter (8) with the pore diameter not more than 2 mu m is placed in the fog outlet channel (2) of the salt fog generator, and the salt fog screened by the wire mesh filter (8) is introduced into the test box for standby.
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| CN201911044164.3A CN110687040B (en) | 2019-10-30 | 2019-10-30 | Salt mist generator and salt mist generation method |
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| CN201911044164.3A CN110687040B (en) | 2019-10-30 | 2019-10-30 | Salt mist generator and salt mist generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114544266B (en) * | 2020-11-20 | 2023-12-22 | 中国兵器工业第五九研究所 | Chloride ion real-time monitoring device used in atmosphere environment |
| CN112326545B (en) * | 2020-11-25 | 2022-03-15 | 广东艾斯瑞仪器科技有限公司 | Composite salt fog test box |
| CN113916756B (en) * | 2021-08-19 | 2024-01-26 | 中国兵器工业第五九研究所 | Ship cabin environment simulation test equipment |
| CN114994143B (en) * | 2022-05-26 | 2024-02-20 | 中国兵器装备集团西南技术工程研究所 | Method for online regulating and controlling chloride ion concentration in salt spray test box |
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| JP2006258506A (en) * | 2005-03-15 | 2006-09-28 | National Institute For Materials Science | Actual environment simulating atmospheric corrosion test device and actual environment simulating atmospheric corrosion test method using the same device |
| JP2007218639A (en) * | 2006-02-14 | 2007-08-30 | National Institute For Materials Science | Sea salt particle generator of high-speed high-precision |
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| CN102608301A (en) * | 2012-03-13 | 2012-07-25 | 广州合成材料研究院有限公司 | Salt mist system of multifactor environmental aging test device for composite material |
| CN106124394A (en) * | 2016-08-31 | 2016-11-16 | 中国兵器工业集团第五三研究所 | A kind of simulating ocean environment accelerated corrosion assay device |
| CN207286262U (en) * | 2017-01-22 | 2018-05-01 | 杭州聚陆医疗器械有限公司 | A kind of low level salt fog generator for salt room |
| CN106594947B (en) * | 2017-01-22 | 2022-03-01 | 杭州聚陆医疗器械有限公司 | Salt room in high-concentration salt fog environment |
| CN107497617A (en) * | 2017-08-22 | 2017-12-22 | 杭州聚陆医疗器械有限公司 | A kind of salt fog generator |
| KR101960409B1 (en) * | 2018-09-18 | 2019-07-31 | 김용욱 | Rock Salt Agitation Apparatus for Snow Removal Solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006258506A (en) * | 2005-03-15 | 2006-09-28 | National Institute For Materials Science | Actual environment simulating atmospheric corrosion test device and actual environment simulating atmospheric corrosion test method using the same device |
| JP2007218639A (en) * | 2006-02-14 | 2007-08-30 | National Institute For Materials Science | Sea salt particle generator of high-speed high-precision |
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Address after: 400039 Chongqing Jiulongpo Yuzhou Road No. 33 Patentee after: NO.59 Institute of China Ordnance Industry Address before: 400039 Chongqing Jiulongpo Shiqiaopu Yuzhou Road No. 33 Patentee before: NO 59 Research Institute OF CHINA ORDNACE INDUSTRY |
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