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Air separation tower dynamic process simulation system and method

A dynamic process and simulation system technology, applied in the field of air separation, can solve problems such as inability to accurately simulate the dynamic process of air separation towers

Inactive Publication Date: 2011-12-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing air separation industrial process cannot accurately simulate the dynamic flow of the air separation tower, the present invention provides a system and method capable of accurately simulating the dynamic flow of the air separation tower

Method used

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  • Air separation tower dynamic process simulation system and method
  • Air separation tower dynamic process simulation system and method
  • Air separation tower dynamic process simulation system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] refer to figure 1 , figure 2 , image 3 , a dynamic process simulation system for an air separation tower, comprising an on-site intelligent instrument 2 connected to an air separation tower 1, a data interface 3, a control station 4, a database 5 and a host computer 6, the intelligent instrument 2 is connected to a field bus, and the field bus Connect with data interface 3, described data interface is connected with control station 4, database 5 and host computer 6, and described host computer 6 comprises:

[0163] The signal acquisition module 7 is used to collect current production working condition data;

[0164] The solving and calculating main module 8 is used for solving and calculating, and the following process is used to complete:

[0165] 1) Set the structural parameters and operating parameters of the tower, set the starting time tstart and the ending time tend;

[0166] 2) Specify the liquid phase composition and liquid phase flow rate of each tray at ...

Embodiment 2

[0261] refer to figure 1 , figure 2 , image 3 , a kind of air separation tower dynamic process simulation method, described process simulation method comprises the following steps:

[0262]1) Set the structural parameters of the tower, collect the production condition data, set the starting time tstart, and the ending time tend;

[0263] 2) Specify the liquid phase composition and liquid phase flow rate of each tray at the initial moment, so that the current iteration time t=tstart;

[0264] 3) For each tray, calculate its equilibrium temperature and vapor phase composition by the bubble point method;

[0265] 4) For each tray, calculate the enthalpy of its vapor-liquid phase;

[0266] 5) Simultaneous formula (1) (2) to calculate the vapor-liquid phase flow rate of each tray:

[0267] V j + 1 H j + 1 G ...

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Abstract

The invention provides a dynamic flow simulation system for an air separation tower, which comprises a field intelligent instrument connected with the air separation tower, a control station, database and an upper computer, wherein the upper computer comprises a signal acquisition module for acquiring current production working condition data and a solving calculation main module. The solving calculation main module is implemented by the following processes: setting a structural parameter and an operating parameter of the tower, and setting a start moment as tstart and an end moment as tend; designating liquid phase composition and liquid phase flow of each tower plate at the start moment, and ordering the current iteration time t=tstart; calculating a balance temperature, a vapor phase composition and enthalpy values of vapor and liquid phases of the each tower plate by using a bubble point respectively; calculating the flow of the vapor and liquid phases of the each tower plate by using formulas (1) and (2); calculating the liquid phase composition and the liquid phase flow of the each tower plate at the (t + delta t) moment; and ordering t= t + delta t, iterating the formula by using new liquid phase composition and new liquid phase flow of the each tower plate till t is more than or equal to tend, ending iteration, and outputting a result. The invention also provides a dynamic flow simulation method for the air separation tower. The invention provides the dynamic flow simulation system and the dynamic flow simulation method for the air separation tower capable of accurately simulating the dynamic flow of the air separation tower.

Description

technical field [0001] The invention relates to the field of air separation, in particular to an air separation tower dynamic process simulation system and method. Background technique [0002] Oxygen, nitrogen and argon are used in a wide variety of applications. Oxygen can be used in steel manufacturing, chemical technology, metal processing, glass manufacturing, oil recovery and refining, paper making, health care services, aerospace defense, etc. Nitrogen is widely used as a protective gas in the metallurgical industry, oil recovery and refining, metal production and processing, electronics industry, and chemical industry. Argon is used as shielding gas in aircraft manufacturing, shipbuilding, atomic energy industry and machinery industry, and also has very important applications in electronics and lighting industries. The low-temperature air separation method is to use the difference in boiling points of oxygen, nitrogen, argon and other components in the air, and use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 刘兴高叶逍荣
Owner ZHEJIANG UNIV