加工渔船制冷系统冷凝器液位控制故障研究

Research on Condenser Level Control Problem in the Refrigeration System in Drawlers

为提高速冻量,渔船将平板速冻系统改装上船。但新的问题是,在环境恶劣的条件下作业时,该系统会因船体横倾时冷凝器液位变动而无法正常工作、压缩机润滑油油温过高、排气压力过高而频繁停机。本文对渔船速冻系统存在的问题和安全隐患进行分析和研究。分析发现,导致一系列故障的直接原因是浮球阀无法保证冷凝器的正常液位。结合渔船的实际情况,作者提出几条排除故障的解决方案,逐条分析各方案的可行性和经济性。依据分析结果,对液位控制系统进行了简单改装,由压力继电器取代了浮球阀,成功实现对冷凝器液位的有效控制。经过1年左右的运行实践,改装后的制冷系统不仅排除了液位控制的故障和隐患,还简化了对此系统的管理程序,而且每天的速冻量比原来增加约3.5%。

Plate quick-freezing system is installed on fishing boats in order to increase their refrigerating capacity.There would be some new troubles with the complicated,abominable working environments of drawlers,such as the refrigerating system is out of work because of the ship swaying, auto-stop troubles with over-heated oil temperature or high delivery pressure.After theoretical analysis found,the abnormal level auto-controlled by ball float valve was the direct reason.According to the drawler＇s condition,independent plate quick-freezing system and its common and potentia! safety problems are analyzed firstly,solutions was proposed and analyzed about the questions in turn.The questions are treated by a simple improvement on the system in question based on the best solution,and the level controller,ball float valve is changed by a pressure relay.Improved quick-freezing system overcomes potential problems,simplifies management,and the frozen goods per day increased to about 3.5% in one year.