FAQ

The subcooler of the distillation tower of an air separation plant

At present, most of the cooling materials filled in the cooling box of the air separation plant are Pearl sand. Pearl sand is a particle with small apparent density, which is easy to fly. It will invade the facial features, stimulate the throat and eyes, and even suck in the lung through the respiratory tract. Therefore, wear a protective mask when working. The fluidity of Pearl sand is very good, and its density is smaller than that of water. People will be drowned and suffocated when they fall into the Pearl sand layer. Therefore, the manhole on the top of the cold box and the loading position should all be installed with 8 ~ 10mm steel bar welded square-shaped safety iron fence to prevent accidents. When the Pearl sand needs to be removed, the leaking parts are found in the cold box. If it is oxygen leakage, it will increase the oxygen concentration in the cold box, and if it is fire overhaul, explosion accident may occur; if it is nitrogen leakage, the nitrogen concentration in ...

Biogas purification is the removal of impurity components from biogas to make high quality CH4 with high methane content, calorific value and impurity gas components that meet the requirements of natural gas standards. The biogas produced by the anaerobic fermentation process contains approximately 55% CH4 and 45% CO2, as well as small amounts of H2S, H2O and other gaseous components, which can be increased to over 95% by separation and purificat...

Molecular sieve adsorber can adsorb water and carbon dioxide at normal temperature, and at the same time, it can adsorb hydrocarbon such as acetylene. According to the data provided by Linde company, the formula and experimental data of the adsorption efficiency of molecular sieve removing acetylene and other hydrocarbon are as follows: ηx=(1-yci/yji)×100%. Thereinto, the adsorption efficiency of 96.h6 and C2H6 is almost zero; that of C3H8 is 89%; that of C2H4 is 97%; that of C3H6, C2H2 and C4H10 is almost 100%. It can be seen from the above data that molecular sieve purification can be used to clear acetylene, propylene and so on, but it is ineffective to methane and acetane. In order to ensure the safe operation of the unit, the following problems should be paid attention to during the operation: 1) the molecular sieve adsorber should be in a good working state, with complete desorption and regeneration, full and smooth bed and no short-circuit airflow passing; 2) keep the main co...

Molecular sieve (also known as synthetic zeolite) is a kind of microporous crystals made up of SiO and AIO sihedron and the frame structure. There are metal cations (such as Na, K, Ca, etc.) in the molecular sieve lattice to balance the redundant negative charge in the sihedron. According to its crystal structure, the types of molecular sieve are mainly divided into: Type A, Type X, type Y, etc. TYPE A 5 r H-[2 d4 M + g4 Z % f the main component of r H-[2 d4 M + g4 Z % f is siovenate, with a Aperture of 4A (1A = 10-10 M), which is called 4A (also known as Nano A) molecular sieve; the aperture of 5A is formed by exchanging the Na + in the 4A molecular sieve with Ca +; the aperture of 3A is formed by exchanging the Na + in the 4A molecular sieve with K +, that is 3A (also known as potassium A) molecular sieve. X-TYPE The crystal structures of the aluminium silicon are different (the size of the ratio of silicon to aluminum is different), forming the molecular sieve crystal with the ...

Because gas and liquid nitrogen are in a coexisting saturated state and have the same saturation temperature. However, saturated liquid and saturated vapour at the same temperature belong to different states. A saturated vapour gives off heat to condense into a saturated liquid, and when the temperature remains constant, the saturated liquid absorbs heat to evaporate into a saturated vapour. For the sa...

Liquid gasification filling system consists of liquid storage tank, liquid pump and air purifier. In order to ensure the normal operation of the liquid pump, besides the reliability of the structure of the pump itself, the piping technology is also very critical. Improper piping, if it is light, it will cause "cavitation phenomenon" of the liquid pump, and the decrease of flow rate will lead to large mechanical loss of the pump; if it is serious, the filling pressure cannot be improved due to the serious gasification of the liquid in the pipe, the pump cannot work normally. Therefore, the following problems should be paid attention to when piping: 1) the base of the storage tank should be over 1m higher than the center of the liquid oxygen pump to ensure that the inlet of the pump has a higher static pressure (higher than the saturation pressure corresponding to the temperature ); 2) shorten the length of the pipeline from the storage tank to the pump inlet as much as possible to re...

Why do we need to balance the pressure when the molecular sieve adsorber is switching: (1) when the molecular sieve adsorber is switching, we need to balance the pressure first to ensure the smooth operation of the whole device. When the molecular sieve adsorber is switching, if the pressure is uneven, then in order to fill the inner space of the container, the air flow and pressure of the device will fluctuate suddenly. (2) In addition, if the molecular sieve adsorber which is going to be put into use does not carry out uniform pressure first, it will be strongly impacted by the air when switching, which will deform or even damage the barrier. Aluminum glue and molecular sieve also rub and squeeze each other because of the impact. After producing dust particles, they enter the internal channel of the absorbant, causing blocking and reducing the adsorption efficiency. Therefore, the molecular sieve adsorber must be under average pressure before switching.