Precautions for transferring liquefied gas
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This post was last edited by *aojiaoya0546 on 2015-7-18 21:03. Due to maintenance work, the company requires the liquefied gas tanks to be emptied (note: for a 1000-cubic-meter spherical tank, about 600 cubic meters of the liquid needs to be transferred out into an empty tank). Let’s discuss: how should liquefied gas be transferred from one tank to another? What are the precautions when pouring from a jar? Thank you. Welcome to all marine enthusiasts who are willing to offer their advice; thank you
The relevant processes before pouring must be error-free, with no open areas. Self-pressure? Empty tanks should be vented of non-condensable gases. It might also be necessary when using a pump, depending on the pressure in the existing empty tank. Do the two cans have the same capacity? There are existing empty tanks; if the capacity of one tank is not sufficient, attention must also be paid to the liquid level in those existing empty tanks.
Spherical tanks usually have two or more, right? The pump for liquefying the liquid can simply transfer it to another tank. To reduce material waste and environmental pollution, the tank that needs to be emptied can be pressurized with nitrogen so that most of the gas gets liquefied. However, this pressure shouldn’t be set too high; we used 7 kilograms in the past. This is because there is a balance between gas and liquid states. Although higher pressures result in a lower proportion of liquefied gas in the gas phase, costs also need to be taken into consideration
Liquid hydrocarbon pump tank transfer procedure – but what are the precautions when there is water in the empty tank?
As long as there is no oxygen, a little water is fine.
1. First, fill the empty tank with an appropriate amount of nitrogen gas； 2. Slowly drain the water from the tank ； 3. Take samples from multiple locations to analyze oxygen content ； 4. Fill with nitrogen again, then take a sample for analysis ； 5. After repeating the operation 5 times in a row, the sample analysis shows satisfactory results ； 6. Then, slowly introduce liquefied gas to gradually displace the nitrogen ； 7. The above operations must be carried out by at least two people, with one person remaining on site to supervise ； The shift supervisor and the person in charge of the production process must supervise on-site and are not allowed to leave throughout the entire operation.
After repeating the operation 5 times in a row, 3 successful attempts are sufficient. .