Vacuum oil and gas are cooled from 400 degrees to 50 degrees. What cooling method is best?
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I would like to ask, now we need to cool the 400-degree oil and gas with a vacuum degree of 95 to 50 degrees. Can we use one-stage water-cooling heat exchange to meet the requirements?
This post was last edited by wiseboy on 2018-8-9 11:59 1. The vacuum degree is 95, is the pressure = 100-95 = 5 kPa? 2. Preliminary analysis: Circulating water can be used, 32-38 ℃, one-stage cooling is sufficient, and the temperature difference correction coefficient is reasonable: 0.9563 The conditions you gave can only be analyzed to this extent. The "oil and gas" you mentioned is very vague.
Thank you for your answer. The pressure is 5kPa. Oil and gas refer to crude oil gas.
This post was last edited by wiseboy on 2018-8-9 13:30 Crude oil gas, more than 10 minutes: The gas naturally released from crude oil should be mainly methane ； The gas produced when crude oil is heated and cracked is in the fractional distillation range (temperature), and different distillation ranges vary greatly. It is better to give the composition so that the heat exchanger can be calculated scientifically.
Hello, thank you for your careful explanation. I am a layman in chemical engineering. Crude oil gas is a gas produced by heating and cracking. The maximum temperature of heating is 400 degrees and the pressure is 5kPa. I don’t have the composition here.
You are definitely not talking out of thin air. for example: Heating from 20°C to 400°C, heating from 50°C to 400°C, heating from 100°C to 400°C, heating from 300°C to 400°C... There is a big difference in which section of the cracked gas it is. It's a world of difference. You're talking about oil and gas in general terms here. How many people are willing to answer such a vague question?
Thank you for your patience~! The temperature is heated from 100 to 400 degrees, the pressure is 5kPa, and the total mass of oil and gas is 3000kg/h. What calculation information is needed? Please enlighten me~!
If it is cold to 50 degrees, you need to ensure that the water temperature is less than or equal to 35 degrees, which is not necessarily related to the vacuum degree!
The requirements can be met by using an air cooler
Is it appropriate to use cooling water for such a large temperature difference? The heat exchanger is not easy to design either! Is it better to use oil cooling?