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Aviation fuel free water detection test paper as well as preparation method and detection device thereof

A technology of aviation fuel and test paper, which is applied in the field of aerospace, can solve the problems of reducing the viscosity of aviation fuel, short storage period, and risk in use

Active Publication Date: 2020-10-30
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) Water will breed microorganisms, leading to further pollution of aviation fuel; for example, in 2011, Israel's Ben Gurion Airport was contaminated by fuel microorganisms, which made it impossible for all aircraft on this route to refuel in Israel;
[0006] (3) Water will freeze at low temperatures, which may cause blockage of the oil pipeline, which will cause the engine to stop at high altitude; for example, in January 2008, the Boeing 777 aircraft at Heathrow Airport in the United Kingdom, due to the water content of aviation fuel, the fuel pipeline was damaged when flying at high altitude. The road was icy and blocked, causing the plane to stall outside the runway and fall to the ground, causing serious damage to the plane and injuries to personnel;
[0007] (4) Free water in fuel will reduce the viscosity of aviation fuel and affect the effect of antistatic additives. During high-speed transportation, aviation fuel may rub against non-metallic pipes, generate and accumulate free charges, and easily explode;
[0008] (5) SO in the atmosphere 2 Such corrosive gases are easily dissolved in water and corrode electrical components
Because the water-sensitive reagent on the surface of the Shell water meter test paper is easy to fall off and be oxidized, its shelf life is short, and it is difficult to judge when the test paper fails, and there are risks in use
In summary, the existing detection methods have problems such as complex detection, high cost, long detection cycle, and short storage period.

Method used

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  • Aviation fuel free water detection test paper as well as preparation method and detection device thereof
  • Aviation fuel free water detection test paper as well as preparation method and detection device thereof
  • Aviation fuel free water detection test paper as well as preparation method and detection device thereof

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preparation example Construction

[0060] Correspondingly, another embodiment of the present invention also provides a kind of preparation method of above-mentioned aviation fuel free water test paper, and it comprises the following steps:

[0061] S1), filter paper soaked K 3 [Fe(CN) 6 ] solution, and then dried to obtain intermediate detection test paper;

[0062] S2), in the middle detection test paper surface coating FeSO 4 Powder mix with chelating agent.

[0063] In the above preparation process:

[0064] Step S1 is the step of loading potassium ferricyanide on the filter paper. This step adopts a soaking-drying method, which can improve the uniformity of distribution of potassium ferricyanide on the surface of the filter paper, and form a light yellow test paper with uniform color distribution, and then Improve detection accuracy and sensitivity. In this step, K 3 [Fe(CN) 6 ] Solution concentration is preferably 3~10g / L, too low potassium ferricyanide solution will cause the loaded potassium ferri...

Embodiment 1-3 and comparative example 1-2

[0086] The test paper preparation process is as follows:

[0087] 1. Use rapid quantitative filter paper with a pore size of 100 μm and soak it in different concentrations of K 3 [Fe(CN) 6 ] solution, 1LK 3 [Fe(CN) 6 ] The solution soaks 200 pieces of filter paper, and the area of ​​a single piece of filter paper is 225cm 2 . K used in Examples and Comparative Examples 3 [Fe(CN) 6 ] Solution concentration is listed in Table 1;

[0088] 2. Drying: The drying temperature is 60°C, the drying time is 30 minutes, and the intermediate test paper is obtained after drying;

[0089] 3. FeSO 4 The powder and citric acid were mixed according to the weight ratio of 100:0.5, and water-cooled ball milled to a particle size of 20 μm to obtain FeSO 4 powder mixture with chelating agent;

[0090] 4. Electrostatic powder spraying is used for coating, and FeSO is coated on the surface of the test paper in the middle 4 Powder mixture with chelating agent, the coating weight is 1.65mg / c...

Embodiment 1、4-5， and comparative example 3

[0099] The test paper preparation process is as follows:

[0100] 1. Use different filter papers and soak them in K with a concentration of 5g / L 3 [Fe(CN) 6 ] solution, 1LK 3 [Fe(CN) 6 ] The solution soaks 200 pieces of filter paper, and the area of ​​a single piece of filter paper is 225cm 2 . The filter paper type used in the embodiment and the comparative example is listed in table 2;

[0101] 2. Drying: The drying temperature is 60°C, the drying time is 30 minutes, and the intermediate test paper is obtained after drying;

[0102] 3. FeSO 4 The powder and citric acid were mixed according to the weight ratio of 100:0.5, and water-cooled ball milled to a particle size of 20 μm to obtain FeSO 4 powder mixture with chelating agent;

[0103] 4. Electrostatic powder spraying is used for coating, and FeSO is coated on the surface of the test paper in the middle 4 Powder mixture with chelating agent, the coating weight is 1.65mg / cm 2 .

[0104]The aviation fuel with fre...

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Abstract

The invention relates to the technical field of aerospace, and in particular, relates to aviation fuel free water detection test paper as well as a preparation method and a detection device thereof. The detection test paper comprises filter paper, potassium ferricyanide loaded on the surface of the filter paper, and a mixture of ferrous sulfate and a chelating agent. The preparation method of theaviation fuel free water detection test paper comprises the steps: infiltrating the filter paper into a K3[Fe(CN)6] solution, and then drying to obtain intermediate detection test paper; and coating the surface of the intermediate test paper with a powder mixture of FeSO4 and the chelating agent on. The aviation fuel free water detection test paper provided by the invention has the following advantages that the detection method is simple and convenient, easy to operate, free of specialization and instruments, convenient to use, capable of detecting by naked eyes, intuitive, concise, rapid andefficient; the detection sensitivity is high; the effective service life is long, whether failure occurs or not can be easily judged through visual color change, and the detection reliability is improved; the production cost is low.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a test paper for detecting free water in aviation fuel, a preparation method and a detection device thereof. Background technique [0002] Aviation fuel (including aviation gasoline and aviation kerosene) often contains dissolved water and free water, and free water is also called non-dissolved water. The free water and dissolved water in the fuel will be converted into each other in the fuel with the change of temperature and humidity: as the temperature of the fuel increases, the free water will dissolve into the fuel and be transformed into dissolved water, further increasing the content of dissolved water; as the temperature of the fuel decreases, the dissolved water will It will be separated from the fuel and converted into free water. Dissolved water does not change the appearance of the fuel, while free water usually appears as fog or cloudiness, water beads, water clu...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H17/66D21H19/38D21H19/44D21H21/14G01N21/78
CPCD21H27/08D21H17/66D21H19/38D21H19/44D21H21/14G01N21/78G01N31/222D21H19/64
Inventor 柳华夏祖西王文武向海周宁曾泰
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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