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Air separation parts FAQ

Why does the moisture content of the air decrease after passing through the cooling tower?
May 22, 2024
The working pressure of the high-pressure oxygen compressor used for filling bottles is high, and it is easy to cause cylinder burning accidents due to improper operation and management. In order to prevent this kind of accidents from happening, the following matters should be paid attention to when using and maintaining: 1) for the parts of the oxygen compressor, the maintenance tools and the hands of the maintenance personnel must be strictly skim and cleaned, finally, clean the carbon tetrachluene thoroughly. When pulling out the piston for overhaul, special attention should be paid to clear the oil stain at the bottom of the piston rod in case of stain the seal. When the sealer and scraper are worn out, they should be replaced in time to prevent them from being oiled; 2) the distilled water used for lubrication must not be interrupted. Distilled water tank should be more than 2m higher than cylinder head, and water level gauge and dripping device should be easy to monitor. The a...
May 14, 2024
How many types of expansion machines are there in the expansion refrigeration system of air separation equipment?
May 07, 2024
What are the reasons why the main cooling liquid level of the air separation equipment is not high and how to solve it?
Apr 25, 2024
Leakage is the easiest failure of regulating valve during operation. Some leak at the welding place, and some leak at the sealing place of the stuffing. When leakage occurs at the welding site, repair welding can be done during overhaul; when leakage occurs at the sealing site of the stuffing, new stuffing can be replaced. Sometimes the film of the film actuator is damaged, and the valve stem can't act normally with the air pressure signal, so it needs to be replaced with a new film. In order to avoid the deformation of the valve stem affecting the regulating function, it is better to stand on the pipeline when installing the regulating valve. It is not suitable to install the low-temperature film regulating valve horizontally, and it should form an angle above 150 with the level so that the sealing place of the stuffing is not affected by the liquid. The slanting valve must be lifted. When operating, always pay attention to whether the regulating valve gets stuck. The sealing fille...
Apr 17, 2024
What are the safety precautions for air purification systems in air separation plants?
Apr 09, 2024
The most likely leakage of switching heat exchanger is the welding line, especially the joint of the head and the pipeline. Most of the causes of leakage are the quality problems of manufacture and installation, which are also related to maintenance. The working condition of switching heat exchanger is poor. It is not only impacted by alternating airflow, but also changes greatly in airflow temperature. In long-term operation, the weak parts are easy to leak. Therefore, the welding quality should be strictly guaranteed during manufacture and installation. After installation, strict leak detection and pressure test must be carried out before driving, and problems should be dealt with timely to avoid passivity after driving. There are three methods to check whether the switching heat exchanger leaks in operation: 1) flow method. When a large amount of leakage occurs between the channel of product oxygen or product nitrogen and air channel, the output of oxygen or nitrogen increases ob...
Mar 29, 2024
For the pipeline with pressure, the easiest problem in the production process is the leakage at the connection flange. Once leakage is found, do not tighten the bolt under pressure. There are some reasons for the leakage in the process of operation, such as gasket damage, pipeline under thermal stress, etc. At this time, the problem can't be solved only by twisting the bolt, and often screw the Bolt hard because the leakage has not been eliminated until the bolt is broken and the high pressure gas in the pipe sprays out, causing injury accidents. There have been several factories which have suffered from the accident of Bolt fracture caused by the screw bolt with pressure and the casualty of flange plate flying out. Therefore, it is necessary to strictly abide by the regulation that the screw bolts with pressure are not allowed, and it is not allowed to hold fluke mentality and violate the operation regulations in order to seize time and catch up with tasks.
Mar 21, 2024
What is the reason for the temperature drop in the expansion of an air separation plant expander being greater than the throttling temperature drop effect?
Mar 13, 2024
What are the impurities in the air and why do they need to be removed during the process of air entering the air separation equipment?
Mar 05, 2024
What are the reasons why the rated power and pressure of the low-temperature liquid pump in the air separation equipment cannot be reached, and how to deal with them?
Feb 26, 2024
What are the advantages and disadvantages of nitrogen production by cryogenic air separation equipment and nitrogen production by pressure swing adsorption?
Feb 18, 2024
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