SPYRO Suite

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The SPYRO Suite of programs is a suite created by the Pyrotec division of Technip to simulate the steam cracking process to create ethylene from hydrocarbons in an ethylene furnace. The suite consists of four main modules:

  • SPYRO, simulates the cracking process inside the radiant coils;
  • TES, simulates the cooling of process fluids and generation of steam in the transfer line exchanger;
  • FIREBOX, simulates the conversion of fuel in the radiant box and heat transfer to the radiant coils;
  • CONVEC, simulates the recovery of flue gas heat in the convection section.

[edit] Applications

For an engineering company such as Technip, the SPYRO suite is a key tool for the design of ethylene furnaces. For an operating company, SPYRO can be applied in several ways:

  • off-line tool for case studies such as furnace operability studies.
  • planning and scheduling including valuation of available feedstocks on the spot market.
  • on-line yield model in an advanced process control system.
  • on-line yield model in a (closed loop) real time optimization system.

SPYRO is licensed solely to ethylene producers. The program is used by approximately 70% of all ethylene producers world-wide, based on nameplate capacity (April 2006).

[edit] Theory

The core of the SPYRO program is the Kinetic Scheme. It consists of over 7000 equations and uses approximately 250 hydrocarbon (pseudo) components. The equations are written in the residual equation form f(x,y)=0.

The model is based on first principles and is validated for feedstocks ranging from ethane to (treated) heavy gas oil with a carbon number of up to 40. It is designed to handle operating conditions of both pilot plants and commercial scale furnaces irrespective of the technology licensor.

[edit] History

Developments on SPYRO started in the late sixties by the team of Prof. Mario Dente and Prof. Eliseo Ranzi of the Politecnico di Milano. Commercialization by Pyrotec started in 1978. The current version is SPYRO 7, released October 2006.

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