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Dynamic modeling method of flash evaporator

A modeling method, flasher technology, used in instrumentation, adaptive control, control/regulation systems, etc.

Active Publication Date: 2014-03-26
杭州百子尖科技股份有限公司
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Problems solved by technology

[0003] In the traditional flash evaporator modeling process, at least three conditions in the flash evaporator, temperature, pressure, material composition, and liquefaction fraction, need to be given to calculate the flash evaporator process. In the dynamic modeling process, the flash evaporator The temperature and pressure in the interior are always changing, so the use of traditional flash modeling methods to model dynamic flash has certain limitations

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  • Dynamic modeling method of flash evaporator
  • Dynamic modeling method of flash evaporator
  • Dynamic modeling method of flash evaporator

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] The object of the present invention is to propose a new modeling and calculation method for the dynamic model of the flash evaporator, specifically a simulation calculation method for the dynamic flash evaporator. The mathematical models involved in the modeling process of the flash evaporator include material balance equation, normalization equation, phase balance equation, energy conservation and the principle of constant physical volume of the flash evaporator, etc. In the calculation process, first assume the temperature and pressure in the flash evaporator, calculate the gas-liquid content and composition in the flash evaporator through the material balance equation, normalization equation and phase balance equation, and then judge through the energy balance equation and the principle of constant volume of the flash evaporator Whether the assumed temperatur...

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Abstract

The invention relates to a dynamic modeling method of a flash evaporator. On the basis of modeling and calculation of a traditional flash evaporator, dynamic flash evaporation modeling is put forward for the first time according to the principle that the physical volume of the inside of the flash evaporator is unchanged, namely a novel method for dynamic modeling of the flash evaporator is put forward by the combination of an energy balance equation, a normalization equation, a phase balance equation and a material balance equation. In the calculation process, firstly, temperature and pressure in the flash evaporator are assumed, content and composition of gas and liquid in the flash evaporator are calculated by means of the material balance equation, the normalization equation and the phase balance equation, and then according to the energy balance equation and the principle that the volume of the flash evaporator is unchanged, whether the assumed temperature and pressure are reasonable or not is judged. The dynamic modeling method reduces the difficulty of flash evaporation calculation, and meanwhile, develops a novel road for calculation of modeling of the flash evaporator.

Description

technical field [0001] The invention belongs to the technical field of chemical simulation simulation, and relates to a dynamic flash evaporator modeling method. Background technique [0002] With the advancement of science and technology, more and more chemical companies tend to use dynamic simulation to analyze and learn their processes when investing in new production equipment, improving old processes, or training employees. Evaporators are widely used in chemical industry production, and reports on dynamic flash evaporator modeling are rare at home and abroad, so it is imperative to develop a dynamic model of flash evaporator. [0003] In the traditional flash evaporator modeling process, at least three conditions in the flash evaporator, temperature, pressure, material composition, and liquefaction fraction, need to be given to calculate the flash evaporator process. In the dynamic modeling process, the flash evaporator The temperature and pressure inside are always c...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 魏江葛文锋郑小青包巍郑松
Owner 杭州百子尖科技股份有限公司
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