The operating principle of condensation separation technology is to collect hydrocarbon gases with high boiling points in vapor and turn them into liquid under low temperature conditions by condensation, and make use of them. In reality, the more commonly used condensation methods include the following two:
(1) Direct contact method;
(2) Indirect contact method. It mainly uses the refrigerant or condensing agent material in the heat exchanger tube to produce indirect heat transfer to the gas, turning it into liquid. Generally speaking, the mixed liquid recovered by this method does not need to be separated to obtain oil products with high purity, which has the characteristics of high recovery efficiency. However, the ambient temperature requirement for this operation is relatively high, and it needs to reach about -75 ℃ to ensure its recovery rate. Therefore, the requirements for machine performance are also high, and the complexity of its operation is also increased accordingly. It can be seen that although the condensation separation technology is simple to operate and has strong practicality, its operating cost and energy consumption are relatively high.
Therefore, in actual operation, it can be combined with other technologies to achieve the purpose of learning from each other's strengths and weaknesses. For example, the condensation separation technology can be used to separate the hydrocarbon gas in the vapor into liquid, and then the absorption technology can be used to recover it.
