Treatment method for inner surface of steel high pressure gas cylinder for high purity gas

A high-pressure gas cylinder, high-purity gas technology, applied in the direction of grinding/polishing equipment, etc., can solve the problems of gas purity decrease, harmful impurity content increase, unqualified and other problems

Inactive Publication Date: 2016-10-12
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the high-purity gas is polluted, the purity of the gas decreases, and the content of harmful impurities such as internal particles and moisture increases, making it an unqualified product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for treating the inner surface of a steel high-pressure gas cylinder for high-purity gas, comprising the following steps:

[0030] 1) Cleaning and drying treatment: Use tap water to clean the inner surface of the steel high-pressure gas cylinder, mainly to remove the rust on the inner surface of the steel high-pressure gas cylinder, and then use the hot blow pipe inserted into the steel high-pressure gas cylinder to inject steam , Purge the inside of the steel high-pressure gas cylinder, dry the inner surface of the steel high-pressure gas cylinder, and remove the oil on the inner surface of the steel high-pressure gas cylinder;

[0031] In this embodiment, the length of the hot blowpipe inserted into the steel high-pressure gas cylinder is 1 / 2 of the height of the steel high-pressure gas cylinder, the temperature of the steam is 75°C, the steam pressure during purging is 0.4 MPa, and the purging time is 65 minutes.

[0032] 2) Shot blasting treatment: spray th...

Embodiment 2

[0050] A method for treating the inner surface of a steel high-pressure gas cylinder for high-purity gas, comprising the following steps:

[0051] 1) Cleaning and drying treatment: Use tap water to clean the inner surface of the steel high-pressure gas cylinder, mainly to remove the rust on the inner surface of the steel high-pressure gas cylinder, and then use the hot blow pipe inserted into the steel high-pressure gas cylinder to inject steam , Purge the inside of the steel high-pressure gas cylinder, dry the inner surface of the steel high-pressure gas cylinder, and remove the oil on the inner surface of the steel high-pressure gas cylinder;

[0052] In this step, the length of the hot blowpipe inserted into the steel high-pressure gas cylinder is 7 / 12 of the height of the steel high-pressure gas cylinder, the temperature of the steam is 80°C, the steam pressure during purging is 0.5 MPa, and the purging time is 80 minutes.

[0053] 2) Shot blasting treatment: spray the hig...

Embodiment 3

[0070] A method for treating the inner surface of a steel high-pressure gas cylinder for high-purity gas, comprising the following steps:

[0071] 1) Cleaning and drying treatment: Use tap water to clean the inner surface of the steel high-pressure gas cylinder, mainly to remove the rust on the inner surface of the steel high-pressure gas cylinder, and then use the hot blow pipe inserted into the steel high-pressure gas cylinder to inject steam , Purge the inside of the steel high-pressure gas cylinder, dry the inner surface of the steel high-pressure gas cylinder, and remove the oil on the inner surface of the steel high-pressure gas cylinder;

[0072] In this embodiment, in this step, the length of the hot blow pipe inserted into the steel high-pressure gas cylinder is 2 / 3 of the height of the steel high-pressure gas cylinder, the temperature of the steam is 85°C, the steam pressure is 0.6 MPa during purging, and the purging time for 90min.

[0073] 2) Shot blasting treatme...

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Abstract

The invention discloses a treatment method for an inner surface of a steel high pressure gas cylinder for a high purity gas. The treatment method comprises the steps of cleaning drying treatment, shot blasting treatment, secondary cleaning drying treatment, grinding treatment and tertiary cleaning drying treatment. According to the treatment method, in the grinding treatment step, when the steel high pressure gas cylinder and a polishing tube relatively rotate, the polishing tube sprays a mixed liquid of polishing powder and a grinding liquid to the inner surface of the steel high pressure gas cylinder to sequentially carry out coarse grinding, fine grinding and polishing on the inner surface of the steel high pressure gas cylinder, so that the degree of finish and purity of the inner surface of the steel high pressure gas cylinder are effectively guaranteed, and the purity and long-term stability of the accommodated high purity gas can be effectively guaranteed.

Description

technical field [0001] The invention relates to a method for treating the inner surface of a gas cylinder, in particular to a method for treating the inner surface of a steel high-pressure gas cylinder for high-purity gas. Background technique [0002] With the continuous development of modern industrial technology, high-tech fields such as microelectronics, aerospace, bioengineering, new materials, precision metallurgy, and environmental science have an increasing demand for high-purity gases such as electronic-grade gases, special gases, and standard gases. is also increasing. At this stage, steel high-pressure gas cylinders are often used for filling, storage and transportation of high-purity gases with a purity of more than 99.999%. The quality of the gas itself has a great influence on the purity of the high-purity gas. [0003] When the quality of the inner surface of the steel high-pressure gas cylinder is unqualified, it will pollute the high-purity gas. Pollution...

Claims

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Application Information

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IPC IPC(8): B24C1/10B24C1/08B24C5/00
CPCB24C1/10B24C1/086B24C5/00
Inventor 张永峰邓春锋武春学任方杰
Owner LUOYANG SUNRUI SPECIAL EQUIP
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