雅站导热油系统含气停机原因分析与处理方法

Cause Analysis and Treatment of Gas-Containing Shutdown of Heat Conducting Oil System in Yazhan Station

雅站导热油系统分中温导热油系统和高温导热油系统,高温导热油由导热油炉直接提供,经过3台高温导热油循环泵流入热媒炉,加热后的高温导热油进入各个高温用户为其提供热量;中温导热油通过2台中温导热油循环泵将高温导热油和中温回油利用三位调节阀按照一定比例混合得到,为各个中温用户提供热量。近期因导热油系统含气未脱出,导致2台热媒炉停运、高温导热油循环泵和中温导热油循环泵停泵、气处理装置停机,造成轻烃和液化气无产量和外输气烃露点超标,对下游外输气管线影响十分严重。通过对导热油系统含气的各种影响因素进行原因分析并处理,找出导热油系统含气原因,提出相关的改进建议,为其他相关石油石化单位导热油系统含气停机处理提供经验参考。

Yazhan heat conducting oil system is divided into medium temperature heat conducting oil system and high temperature heat conducting oil system.High temperature heat conducting oil is provided directly by heat conducting oil furnace.High temperature heat conducting oil flows into heat medium furnace through three high temperature heat conducting oil circulating pumps, and after heating, high temperature heat conducting oil enters each high temperature user to provide heat.Medium temperature heat conducting oil uses high temperature oil and medium temperature oil returning through two medium temperature heat conducting oil circulating pumps.Regulating valves are mixed in a certain proportion to obtain medium temperature heat conducting oil, which can provide heat for each medium temperature user.Recently, two heat medium furnaces were shut down, high temperature heat conducting oil circulating pumps and medium temperature heat conducting oil circulating pumps were shut down, and gas processing units were shut down due to the non-release of gas in heat conducting oil system, which resulted in production failure of light hydrocarbons and liquefied gas and hydrocarbon dew point of external gas transmission exceeding the standard with quite serious impact on the downstream external gas transmission pipeline.Through the analysis and treatment of all kinds of influencing factors on the gas content in the heat conducting oil system, the causes of the gas content in the heat conducting oil system are found out, and relevant suggestions are put forward for improvement, which provides reference for the treatment of gas-containing shutdown of heat conducting oil system in other petroleum and petrochemicals companies.