Do liquid storage tanks prone to hydrocarbon accumulation?
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Hydrocarbon accumulation may occur in the main cooling system for air separation, leading to explosion accidents. But can hydrocarbon accumulation occur in liquid oxygen storage tanks as well, resulting in accidents?
Some of our factories also conduct hydrocarbon analysis, usually once a week. The preventive measures are backup delivery (this frequency is too low when the air separation unit is shut down) or refilling the tank. So, in situations where there is little traffic, is it necessary to drain the storage tank from time to time in order to prevent too much hydrocarbon buildup? Isn’t this too wasteful?
As long as your factory keeps producing, won’t there be continuous emission of liquid oxygen? If there are few tank trucks, shouldn’t the storage tanks be full? Balancing production and consumption through tank truck filling is necessary to prevent the accumulation of hydrocarbons. If you are using atmospheric-pressure storage tanks, the daily evaporation rate is quite high; without continuous liquid supply, the risk of losses is still significant. Especially when the amount of liquid entering is less than the amount evaporating, it is a process of gradual concentration.
In the absence of liquid being added to the tank, it is necessary to analyze the levels of acetylene and total carbon in the storage tank on a timely basis. If it is necessary to maintain the liquid level, liquid with a low hydrocarbon content can be sourced from outside and used for backfilling in order to ensure the safety of liquid oxygen in the tank~~
As long as liquid is supplied and the carbon content in liquid oxygen meets the specified standards, the level in the storage tank will not exceed the limits~~
Are you saying that if there is no liquid drainage nor flushing, the storage tank won’t exceed the limits even after being left stationary for about a month? Is it because of the low evaporation rate of the storage tank that hydrocarbons do not accumulate easily?
With liquid inflow, can it last a month without needing to discharge? Additionally, the hydrocarbon content of the liquid you feed in must meet the specified standards~~
I just want to discuss whether it is because the storage tank has good heat-insulating properties, resulting in a low oxygen evaporation rate, which prevents the hydrocarbon levels in the tank from exceeding limits (The prerequisite, of course, is that the hydrocarbons entering the system are of suitable quality.)
I just want to discuss whether it is because the storage tank has good heat-insulating properties, resulting in a low oxygen evaporation rate, which prevents the hydrocarbon levels in the tank from exceeding limits (The prerequisite, of course, is that the hydrocarbons entering the system are of suitable quality.)
Large low-temperature storage tank? Small tanks for medium and low pressure still? The daily evaporation rate of the basic storage tank does not exceed 0.3 percent~~But as long as the tank does not discharge its contents, the level of hydrocarbons will inevitably exceed the specified limit after a certain period of time; hydrocarbons are substances with high boiling points, so they hardly vaporize and escape from the tower~~
A slightly higher level of hydrocarbons in atmospheric-pressure, low-temperature storage tanks with poor liquidity is not a major issue.