MODELING OF GAS AND GAS CONDENSATE PREPARATION UNIT MODES IN LOW-TEMPERATURE SEPARATION TECHNOLOGY

摘要

Currently, there are a lot of computer modeling systems capable of determining the optimal technological parameters of the installation STC depending on the requirements to the quality of the product. However, none of them is not able to display real-time transients in devices when the control parameters (position valves, water flow, etc.). Under transient in this case refers to developing time change parameters of the equipment installation NTS , the transition from one steady state (corresponding to the previous values ??of the control parameters ) to another (corresponding to the new values ??of the control parameters ) . On the basis of mathematical modeling method and physical-chemical nature of gas from liquid hydrocarbons and water at low temperatures due to the Joule-Thompson effect separation, a mathematical model of separator was created. This model allows tracing changes in technological parameters of low temperature separation process in real time. It is implemented as a software product that allows one to study transient processes occurring in apparatus of chemical technological system and also provides an opportunity to examine the effect of control parameters on technological parameters of the system. It is shown that the opening degree of gas valve is gradually reduced (from 28% to 10% in 40 seconds) while pressure in system increases from 7,082 MPa up to 7,633 MPa. On the basis of developed mathematical model a simulator for training of technical personnel of low-temperature separation can be created.