Abstract:

The safety of the pipeline is decreased by the periodic suction and discharge features of the reciprocating compressor, which are easily responsible for pipeline pulsation amplitudes that are too high. As a result, this research studied the secondary compression discharge line of a skid-mounted reciprocating compressor set with substantial pressure variations, employing numerical simulation methods to investigate pipeline airflow pulsation characteristics. According to research, the cylinder dynamic compression process, valve opening and shutting caused secondary compression exhaust pressure variations, and pipeline pressure pulsation amplitude exceeded the API 618 requirement. The secondary exhaust pipe’s vibration test was conducted concurrently to ensure the validity of the modeling method and findings. In order to solve the issue of the secondary exhaust pipe’s airflow pulsation amplitude exceeding the standard, the influence of the filter pipe on the pipe’s airflow pulsation amplitude was examined, and an optimization study was conducted based on the orthogonal test to reduce the pipe’s airflow pulsation amplitude. According to the results, the maximum pressure pulsation of the optimized pipeline was 37.02kPa, 38.36% less than that prior to optimization, and the pipeline safety index was 80.4% higher, which lowered the risk of pipeline damage and increased the safety and stability of the reciprocating compressor set.

Key words: skid-mounted reciprocating compressor, airflow pulsation, pipeline vibration test, filter tube, pulsation abatement

摘要：

往复压缩机周期性吸排气的特性，易导致管路脉动幅值超标，管路安全性降低。因此，本文以撬装式往复压缩机组压力变化较大的二级压缩排气管路为研究对象，采用数值模拟的方法，开展了管路气流脉动特性研究。研究表明：气缸动态压缩过程中，气阀启闭导致二级压缩排气管路压力波动较大，管路压力脉动幅值超过API 618标准。同时，开展了二级排气管路振动测试试验，验证了仿真方法和结果的准确性。针对二级排气管路气流脉动幅值超标的问题，分析了滤波管对管路气流脉动幅值的影响，并基于正交试验，开展了管路气流脉动幅值消减优化研究。结果表明：优化后管路最大压力脉动幅值为37.02kPa，相比于优化前降低了38.36%，管路安全指数提升了80.4%，降低了管路发生破坏的风险，提高了往复压缩机组的安全性和稳定性。

关键词: 撬装往复压缩机, 气流脉动, 管路振动测试, 滤波管, 脉动消减