Study On The Water Hammer Existing In Condensate Water Pipe Network Of Styrene Plant

A hydraulic model is built to find out the reasons of water hammer phenomena existing in the condensate pipe network of styrene plant and some improved schemes are proposed.Firstly, a hydraulic model which is composed of steady-state analysis model and water hammer computation model is built. The steady-state analysis model is based on pressure balance and the water hammer computation model is based on DVCM. The hydraulic model is used for the simulation of condensate pipe network.Secondly, detailed analysis on the reasons of water hammer in actual pipe network is made. Identify the main reasons of water hammer existing in the condensate pipe network are identified. (1) The pressure of internal pipeline is too low, and water evaporation holes are forming, and eventually lead to the liquid column separation. While the liquid column re-aggregation, water hammer will appear. (2) Condensate of different pressure and temperature are mixtured. It will deteriorate the situation.According to the simulation results of the pipe network, some improvements are proposed, including: reducing the degree of vaporization and leading different pressure condensate pipe to the recovery tank respectively. Six detailed schemes are provided.Scheme 1: cooling schemeScheme 2: V402 and V407 leading to V703 through the new pipelineScheme 3: V402 and V407 leading to V703 through the original pipeline by pumpScheme 4: V402 leading to V703 directlyScheme 5:north pipe leading to V703 directlyScheme 6: V402 and V407 leading to V703 through new pipeline respectivelyThrough a detailed comparison, combined with the actual plant, based on the principle of saving investment, economic and reasonable and simple, scheme II is chosed.