One of the worst nightmares a plant manager can experience is a complete flare system outage. The flare system is the last line of defense for many refining and petrochemical facilities and, whe...
Useful manual for flare deign.
Flare frag case studyFull description
FLARENET ™ Software for the Design, Rating and Debottlenecking of Flare and Vent Systems.
Overview FLARENET enables the engineer to perform steady-state design, rating or debottlenecking of single or multiple flare and vent systems. The program can calculate minimum sizes for new flare systems or evaluate alternatives to remove bottlenecks in existing relief networks. FLARENET can also be used to identify potentially dangerous relief scenarios during design phase or current operational scenarios. The program can be used to demonstrate regulatory compliance of the flare and vent systems in relation to over pressure and noise regulations. FLARENET has an intuitive graphical Process Flow Diagram (PFD) environment that presents a clear and precise representation of the network. A typical model of the flare or vent system may comprise of several hundred inter-connected elements including relief valves, control valves, piping, connectors (including expansions, contractions, standard/sweep tees and orifice plates) separators and flare tips. FLARENET ensures that model development is made as simple and efficient as possible.
General Features • Graph Graphical ical user user interface interface with network network drawin drawing g • Con Contex textt sensiti sensitive ve help help system system • OL OLE E co comp mpat atib ible le • Inter Interfaces faces to to Excel, Access, Access, and drafting drafting packages packages • Strea Stream m data data input input direct direct from HYSYS® or Aspen Plus® • Enhanced process flow flow diagram style view displaying of key process variables and annotations displaying pressure, mass flow, mach number, noise • Design violation report summarizing all cases where the design constraints have been exceeded • Part of the the AspenT AspenTech ech suite suite of technical technical softwar software e
Program Capabilities • Mod Modeli eling ng of flare flare or vent vent syst systems ems • Conve Convergent, rgent, diverg divergent ent and complex complex looped looped systems systems • Modeli Modeling ng of singl single e and multip multiphase hase system systemss • Ratin Rating, g, design design and debottlene debottlenecking cking calculati calculation on modes • Multi Multiple ple scenario scenario analysis analysis using any combinati combination on of relieving relieving sources • Multiple Multiple scenario scenario manager, manager, allowing allowing multiple source source management management with a single definition of the pipe network • Detailed Detailed unit operations operations for modeling modeling sources, sources, pressure pressure drop elements elements and sinks • Used in: – Oi Oill and and Ga Gass – Re Refi fine neri ries es – Pe Petr troc oche hemi mica cals ls – E &C – Co Cons nsul ulta tancy ncy
Rating, Design and Debottlenecking Calculation modes
Calculation Options • Design constraints on any combination of allowable back pressure, mach number, phase velocity, RhoV2 or noise • Optional use of rated flow for pressure drops in tail pipes for calculations in accordance with API RP 521 • Heat transfer calculations for pipes. External heat transfer from the surroundings calculated from ambient conditions with or without insulation • Separate source models for relief valves and control valves. Optional calculation of design parameters such as allowable back pressure, relieving pressure and rated flow
Thermodynamics and Pressure Drop Methods • Options of the following VLE methods : – Compressible Flow
– Soave Redlich Kwong
– Peng Robinson
– Vapor Pressure Method
• Enhanced thermodynamic engine using the same three-phase flash algorithm as HYSYS for a fast and robust solution • HYSYS component database • Fluid flow methods:
• Detailed models for tees and swages, including calculations in accordance with D.Miller, ‘Internal Flow Systems’, BHR Group Ltd., 1990
• User defined pressure drop curves for flare tips
Benefits Engineers can use FLARENET to efficiently model complete process plant protection systems designed to handle the complete range of pressurized fluids from the process. The intuitive and graphically orientated layout enables entire systems to be modeled in minimum project time allowing:
• Verification of the engineering specifications of all system devices • Confirmation of current configuration and pipe sizes • Management of all relief scenarios • Checking of piping for all relief scenarios • Total system performance checking • Sizing new flare system to API standards • Production of detailed operating and performance package of the plant flare system • Regulatory compliance to API recommended practices • Reduction in engineering man-hours on flare system design by up to 65%
Fluid flow map
Aspen Technology, Inc. Ten Canal Park Cambridge, MA 02141-2201 USA