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The inerting gas tank Process


Tank top. Then gradually formed by the inerting gas tank cushion of air down the crowded, so that the exhaust pipe from the tank bottom. Squeezed out. 4 affect the situation of the main factors to obtain the vacuum displacement method is generally a good replacement effect, but do not consume too much gas. The effects of inflation are relatively poor replacement method often requires repeated replacement times. Frequency and inflation pressure on inflation and therefore inflation, after a certain time needed for air and inert gas tank full spread, so it takes a fairly long time. Large storage tank air extrusion method is a good method for the situation, the situation of fast, less gas consumption. Since the method used for large storage tanks, so in practice there are still many issues to seriously consider the situation of the time, otherwise it would be longer, gas consumption increases, the serious situation of the results may not meet technical requirements. On the air cushion is inerting extrusion method in the factors affecting the process of discussion. 4.1 molecular diffusion caused by concentration gradient in the inerting, the continuous storage tank filled with an inert gas like a balloon, and was added into the inert gas outside continue to expand, squeezing the air out of the tank. As the inert gas and the gas tank at the interface there is a large concentration gradient would have a molecular diffusion. For example,abercrombie marseille, we use the ammonia to go in front of a tank inerting, in the ammonia tank air interface and there is gas concentration gradient, oxygen concentration is very low in nitrogen, which leads to oxygen molecules in the air to nitrogen I like FOURRIER diffusion heat conduction equation, FIcK wind out of the empirical formula of molecular diffusion the diffusion capacity of a --DBdp/dx where j dp, d in the X direction of the concentration gradient of P A component sets this matter in the mixed A the concentration ratio of diffusion constants from mDA that molecule A molecule B the diffusion coefficient 113 / s from the above equation,abercrombie paris, the amount and molecular diffusion is proportional to the concentration gradient. For inerting effect, the interface of molecular diffusion will have a negative impact. Oxygen in gas tank components (including other components) will continue to diffuse into the nitrogen, with time, diffusion of oxygen into nitrogen molecules,mbt chaussures paris, more and more to the depth of diffusion. This is the undesirable situation. Therefore, the idle speed to try to over-proliferation of speed, so as to save the situation when the question of reducing the consumption of inert gas. 4.2 The temperature gradient in the situation when the filled tank of gas temperature and gas temperature is inconsistent, they will have the interface caused by the thermal motion of molecular diffusion. The results of this proliferation is inerting also has a negative effect. Density of 4.3 has already been made to determine the inert gas from the tank into the top or bottom of the charge is mainly based on the density of the inert gas and the density of the gas tank to determine. The key is inerting gas to be able to form a cushion, but not because the density difference between the convective mass transfer relations, which will greatly reduce the inerting effect. It is worth emphasizing to note that the actual charge into the inert gas temperature, because the programs tend to determine the air temperature as the tank filled with an inert gas with the same temperature. However, the actual species of bamboo filled low-temperature inert gas project in 1995 the temperature and flow rate and the ability to have a relationship of vaporization carburetor. Therefore, special attention should be when the inert gas into the tank temperature. For example, after vaporization of liquid nitrogen for inerting nitrogen gas source, the air storage tank, at the same temperature, air density is greater than the density of nitrogen, in order to form a cushion of nitrogen, nitrogen filled tank from the top . However, if the amount of traffic operations, or have limited the size of the carburetor, is bound to make nitrogen temperature drop. As temperature decreased,christian louboutin boutique, the density of nitrogen increases the density of nitrogen lT density of air, then the role of nitrogen sink due to gravity, and air convection. This effect is reduced to the air, thus increasing the nitrogen inerting consumption and extend the time. 4.4 The impact of air distribution within the general design of gas tank inerting devoted to the inlet and outlet pipes, pipelines, there are many holes. Inerting gas discharged from the hole into the space inside the tank. Exhaust pipe layout and the direction of air flow rate and gas exchange to ensure that all corners and remote parts of the air, otherwise the remaining part of the air in the tank, and this part of the exhaust air 』dagger difficult for inerting with to adverse effects. 5 Conclusion of the inerting gas tank is an indispensable step in the work. Inerting gas can have a wide selection of practical application, should be based on specific requirements and conditions to determine. Extrusion draw large air cushion tank inerting liquid tank, it is a more reasonable approach. Determine the inerting process steps should be considered when the concentration, temperature and density, then the impact of factors, comprehensive selection of gas filled into the tank inerting speed, and control the temperature in the entrance tank.
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