General Procedure of Waste Fluid Replacement
Source:Views:179Release time:2018-02-24

Fluid degradation and thermal cracking happen inevitably during system operation. When the in-used fluid reaches the scrapping standard, fluid indexes of viscosity, carbon residue, flash point and acid value are out of specification, causing system coking and safety performance decreasing. Timely replacement of scrapped fluid is the essential measure to assure system performance and safety. 

Periodic fluid inspection and system maintenance detect abnormal system operation in time. Take relevant adjustment measures when fluid partial indexes reach the warning or scrapping standard.

First step of in-used fluid replacement is to empty the waste fluid from system. Read fluid MSDS and take protective measures before replacement. Operator should be aware of fluid leakage and empty waste fluid thoroughly. Nitrogen purging helps empty system waste fluid.

Second step of fluid replacement is to clean system with cleaning agent. Inject cleaning agent and circulate system in high temperature. It is suggested to take mechanical or chemical decoking measures if system is full of residue and coking. System should be examined before fresh fluid filling, especially in storage and expansion tanks, decreasing the adversely affect to fresh fluid performance. 

Last step is to fill system with fresh fluid. Fluid featured with excellent vaporability, good thermal conductivity and fine thermal stability is the best choice for heat transfer fluid system. Fresh fluid filling should strictly conform to fluid specifications. System heating up procedure includes dehydration, light component removal and heating up system to the operation temperature.

Zhongneng Chemcial
Lianyungang, Jiangsu, China
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