Is it feasible to use natural gas as power for liquefied gas cylinders? Previous liquid
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Is it feasible to use natural gas as power for liquefied gas cylinders? Previously, liquefied gas storage tanks were powered by nitrogen; the mixing of nitrogen with the flare gas and its entry into the fuel gas network would affect the combustion of the fuel gas. Experts with experience in this area, please reply. Thank you!
What does it mean to provide power? Why provide power? It is under pressure by itself; if it is to be transported externally, a pump is used
Natural gas is used to fill the spherical tank in place of nitrogen in order to pressurize the liquefied gas inside it, thereby providing a filling head for the transfer pump.
Yes, but be careful with the pressure matching issue.
Does the composition of natural gas not affect the quality of your liquefied gas?
That’s exactly what we’re worried about! What are your thoughts? Share them. Discussion is welcome.
Its composition varies; the main component of natural gas is methane, with a calorific value of 33–46 MJ/m³, a density of 0.58–0.62 kg/m³. Its volume in liquid form is 1/600 of that in gaseous form, and its explosion limit is 5–15%. Liquefied gas is a mixed gas whose main components are propane, propylene, butane, and butene. Due to the varying amounts of these hydrocarbons, its calorific value varies as well, ranging from 88 to 120 MJ per cubic meter. The volume of liquefied gas in its liquid state is about 1/250 of that in its gaseous state, with a relative density of 1.5–2.0 kilograms per cubic meter. The explosive limit is 2-10%. Introducing natural gas into a liquefied gas tank reduces the calorific value of the liquefied gas, affecting the heat released during its combustion. So it’s better to use nitrogen. Generally, in the replenishment system for liquefied gas tanks, the liquid phase enters the system; as long as the liquefied gas tanks are not emptied, nitrogen will not enter the fuel gas pipeline network, and this will not affect the combustion of the fuel gas.
The advantage of using nitrogen over natural gas is that 1. nitrogen is safer than natural gas; it is an inert gas, so even minor leaks in pipelines and similar systems pose little problem, whereas natural gas is more dangerous. 2. Nitrogen is cheaper and more readily available than natural gas ； 3. A small amount of nitrogen entering the flare will not have an impact on the flare system. 4. Natural gas dissolves in liquid LPG, whereas nitrogen does not.
The critical temperature of natural gas is -82.3°C; natural gas stored at room temperature is in gaseous state inside spherical tanks, so how can it dissolve in liquid liquefied gas?