Large air separation FAQ

How to shorten the start-up time and increase the total cooling capacity of the oxygen concentrator in an air separation plant

Why do air separation equipment with argon towers require particularly stable operating conditions

How to adjust when the argon fraction of the air separation equipment changes

What are the types of water cooling tower structures used for large air separation equipment

The air pressure test on site is mainly to check the air tightness of the air separation plant. The following problems should be paid attention to during Pressure Test: 1) oxygen is strictly forbidden to be used as the pressure test air source; 2) clean and oil-free pressure test air source should be applied to the oil-free equipment without degreasing after pressure test; 3) the pressure gauge used for pressure test should be checked and sealed before using. Before the pressure test, check carefully whether the pressure gauge valve has been opened; 4) during the pressure test, do not knock the pressure test container with a hammer; 5) during the pressure test, do not dismantle or tighten the screws; 6) when using nitrogen cylinder or air source with higher pressure level to inflate and test pressure to the container with lower pressure, pressure reducing valve should be installed, and direct inflating is strictly prohibited. 7) pressure test after the inflation reaches the specifie...

Oxygen (O2) is a colorless, odorless and odorless gas. The molecular weight is 32. The relative density is 1.429 (Air = 1 ). The melting point is-218.4 ℃. Boiling point is-183℃. Can be liquefied and solidified. Liquid oxygen is sky blue. Slightly soluble in water. It is not very active at normal temperature, and it is not easy to have effects on many substances; but it is very active at high temperature, and can be directly combined with various elements. Fuel Fuel. Oxygen is the substance on which living creatures depend. It is widely used in industrial production. Acetylene-oxygen flame is used for metal welding and cutting. In metallurgical industry, oxygen is used for iron and steel smelting, steel rolling and non-ferrous metal refining. Oxygen is widely used in medical treatment and deep work. Modern industry adopts the method of cooling separation to produce oxygen. According to the pressure of compressed air in its production process, it can be divided into four types: High p...

Why is acetylene the most dangerous substance in air separation equipment

Why is it required to frequently discharge liquid oxygen equivalent to 1% oxygen production to the outside of the tower for evaporation in all low-pressure air separation equipment

At present, our government attaches great importance to the work of energy saving and emission reduction, and many binding targets such as China's energy saving and emission reduction during the "13th Five-Year Plan" period will be stricter. For large air separation plant, how to save energy consumption and reduce operation cost on the premise of ensuring safe, stable and reliable operation is an important issue in the design process of air separation plant. In recent years, due to the rapid development of metallurgy, fertilizer and petrochemical industry, the level of air separation equipment has been constantly expanding. For example, there have been more than 20 sets of large-scale air separation equipment of 60,000 grade which has been put into use made by Hangzhou Hangyang Co., Ltd, and it has expanded to 80 thousand, 100 thousand and 120 thousand levels. Molecular sieve purification system is the key device to purify the air before the air in the air separation plant enters in...

The main components in the air are nitrogen and oxygen. By selecting the adsorbents with different adsorption selectivity for nitrogen and oxygen, the appropriate technological process is designed to separate nitrogen and oxygen to produce oxygen. Both nitrogen and oxygen have four-pole moment, but the four-pole moment (0.31) of nitrogen is much larger than that of oxygen (0.10, therefore, the adsorption capacity of nitrogen on the zeolized molecular sieve is stronger than that of oxygen (nitrogen has strong interaction with ions on the surface of the molecular sieve, as shown in Figure 1 ). Therefore, when the air passes through the adsorption bed equipped with zeolized molecular sieve adsorbents under pressure, nitrogen is adsorbed by the molecular sieve, and oxygen is enriched in the gas phase and flows out of the adsorption bed due to less adsorption, separate oxygen and nitrogen to obtain oxygen. When the molecular sieve adsorbs nitrogen until it is nearly saturated, stop air v...

How are rare gases distributed in the air separation tower of the air separation equipment

1.The cold box foundation is composed of foundation body, water baffle, cold insulation layer and surface layer. 2.The surface of fractionator foundation after completion shall meet the following requirements: a) There should be no cracks and other defects on the surface; b) The surface should be clean, and no inflammable materials such as wood board and linoleum are allowed to be carried; c) Surface flatness < 5 / 1000; d) The surface levelness is less than 5 / 1000, and the total length should not be more than 15mm. 3.After the foundation is qualified, mark the installation center line of the container according to the installation position of the vessel, and mark the direction and position of the pipe orifice.