Surface treatment technology for stainless-steel triangular spiral packing

A spiral filler and surface treatment technology, applied in the direction of metal material coating process, etc., can solve the problems of limited amount of dissolved grease in aqueous solution, small batch processing capacity, heavy load, etc., and achieve improved surface performance of fillers and large batch processing capacity. , the effect of fast processing

Active Publication Date: 2016-07-20
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all have insufficient improvement of the surface properties of the filler, making it difficult for the filler to obtain a better separation effect when used
[0005] For the removal of surface grease, the existing processes mainly include the washing spirit method, the acetone method and the lye method, wherein the washing spirit method uses commercially available washing spirit as a surfactant, and the filler is degreased by boiling an aqueous solution. However, The amount of dissolved oil in the aqueous solution is limited, the consumption of water and heat is

Method used

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  • Surface treatment technology for stainless-steel triangular spiral packing
  • Surface treatment technology for stainless-steel triangular spiral packing

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Effect test

Embodiment 1

[0020] A stainless steel triangular spiral filler surface treatment process, the process comprises the following steps:

[0021] (1) Put the stainless steel triangular spiral packing into water, heat it to 50°C, add a degreasing agent, clean it with ultrasonic vibration for 10 minutes, and then rinse the stainless steel triangular spiral packing with water;

[0022] (2) Aqua regia and water are formulated into an aqueous solution according to a volume ratio of 1:10, and the stainless steel triangular spiral filler rinsed in step (1) is immersed in the aqueous solution, and pulled out after soaking for 24 hours;

[0023] (3) put the stainless steel triangular spiral filler pulled out into 60°C aqua regia for oxidation treatment, and pull it out after the surface of the stainless steel triangular spiral filler loses its metallic luster;

[0024] (4) Clean the stainless steel triangular spiral packing with water until the pH value of the cleaning solution is neutral, then dry or ...

Embodiment 2

[0029] A stainless steel triangular spiral filler surface treatment process, the process comprises the following steps:

[0030] (1) Put the stainless steel triangular spiral packing into water, heat it to 60°C, add a degreasing agent, clean it with ultrasonic vibration for more than 20 minutes, and then rinse the stainless steel triangular spiral packing with water;

[0031] (2) Aqua regia and water are formulated into an aqueous solution according to a volume ratio of 1:20, and the stainless steel triangular spiral filler rinsed in step (1) is immersed in the aqueous solution, and pulled out after soaking for 48 hours;

[0032] (3) put the stainless steel triangular spiral filler pulled out into 50°C aqua regia for oxidation treatment, and pull it out after the surface of the stainless steel triangular spiral filler loses its metallic luster;

[0033] (4) Clean the stainless steel triangular spiral packing with water until the pH value of the cleaning solution is neutral, th...

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Abstract

The invention belongs to the field of material surface cleaning and treatment. In order to overcome defects in a conventional, the invention provides a surface treatment technology for stainless-steel triangular spiral packing. The technology comprises the following steps: (1) ultrasonic oscillation cleaning; (2) aqueous aqua regia solution steeping; (3) aqua regia oxidation treatment; and (4) cleaning and drying. After the stainless-steel triangular spiral packing is treated by the surface treatment technology, grease on the surface of the stainless-steel triangular spiral packing is completely removed, and the technology obviously improves the surface properties of the packing as compared with the conventional technology and enables the packing to easily obtain a good separation effect during use. The consumption of water and heat is low during a treatment process, the batch treatment capacity is high, the treatment speed is high, no undesirable impurity is introduced, the labor intensity of operating personnel is low, an adopted reagent is easy to obtain and low in price, the treatment process has high safety, and produced waste liquid is neutralized with sodium carbonate to be neutral to meet emission requirements.

Description

technical field [0001] The invention belongs to the field of material surface cleaning and treatment, in particular to a surface treatment process for stainless steel triangular spiral packing. Background technique [0002] Among the commonly used metal packings, the triangular spiral packing, as a high-efficiency precision packing, is widely used in the fields of chemical product production, nuclear industry isotope separation and purification, etc. Triangular spiral packing belongs to Fenske Spiral, which is made of metal wire, and its shape is similar to spring, so it is also called triangular spring packing. The difference between its shape and the spring is that each coil is not a circle but a triangle, and the adjacent triangles are staggered by a certain angle. The separation equipment using triangular spiral packing has the advantages of high separation efficiency and uniform gas-liquid distribution. [0003] From the material point of view, the triangular spiral p...

Claims

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Application Information

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IPC IPC(8): C23C22/50C23C22/78
CPCC23C22/50C23C22/78
Inventor 尹玉国阮皓吴栋窦勤成张丽
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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