页岩气管道蒸汽换热器结构设计

Structural Design of Steam Phase Change Heat Exchanger for Shale Gas Pipeline

摘要: 页岩气田开发初期普遍存在井口压力高、水量大、稳产期短的特点，丛式井场多井串接集输时，高压井口采用传统节流降压方案，冬季低温环境下采气管线冻堵问题尤为突出。因此，针对页岩气井口管道设计一种便携可拆卸的蒸汽相变换热器具有重要意义。结果表明，在0.2 MPa蒸汽饱和压力、65 kg/h蒸发量工况下开展持续3小时的加热实验。发现页岩气平均温度提升为7.1℃，达到了预期换热需求。

Abstract: In the early stage of shale gas field development, there are generally high wellhead pressure, large water volume, and short stable production period. When a series of wells are connected in a series of well fields for gathering and transmission, the high-pressure wellhead adopts the traditional throttling and pressure reduction program, and the problem of freezing and blocking of gas pipelines is particularly prominent in the winter low-temperature environment. Therefore, it is of great significance to design a portable and removable vapor phase change heat exchanger for shale gas wellhead piping. The results demonstrated that under the conditions of 0.2 MPa saturated steam pressure and a 65 kg/h evaporation rate, a three-hour heating experiment successfully increased the average temperature of the shale gas by 7.1˚C, meeting the expected heat exchange requirement.