Unlock instant, AI-driven research and patent intelligence for your innovation.

Steady-state flow simulation system and method for air distillation tower

A process simulation and air separation tower technology, applied in the field of air separation, can solve problems such as the inability to accurately simulate the steady state process of the air separation tower

Inactive Publication Date: 2011-11-23
ZHEJIANG UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing air separation industrial process cannot accurately simulate the steady-state flow of the air separation tower, the present invention provides a system and method for simulating the steady-state flow of the air separation tower that can accurately simulate the steady-state flow of the air separation tower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Steady-state flow simulation system and method for air distillation tower
  • Steady-state flow simulation system and method for air distillation tower
  • Steady-state flow simulation system and method for air distillation tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] refer to figure 1 , figure 2 , image 3 , an air separation tower balance level energy-saving calculation system, 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 on-site Bus is connected with data interface 3, and described data interface 3 is connected with control station 4, database 5 and host computer 6, and described host computer 6 comprises:

[0152] The signal acquisition module 7 is used to collect current production working condition data;

[0153] The solving and calculating main module 8 is used for solving and calculating, and the following process is used to complete:

[0154] 1) Set the structural parameters and operating parameters of the tower, and specify the initial value of the feed air flow;

[0155] 2) Assume that the liquid phase composition of each tray;

[0156...

Embodiment 2

[0236] refer to figure 1 , figure 2 , image 3 , a kind of air separation tower steady-state process simulation method, described process simulation method comprises the following steps:

[0237] 1) Set the structural parameters of the tower and collect the production condition data of the tower;

[0238] 2) Assume that the liquid phase composition of each tray;

[0239] 3) For each tray, calculate its equilibrium temperature and vapor phase composition by the bubble point method

[0240] 4) For each tray, calculate the enthalpy of its vapor-liquid phase;

[0241] 5) Simultaneous formula (1) (2) to calculate the vapor-liquid phase flow rate of each tray:

[0242] V j + 1 H j + 1 G + U j - 1 H ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a steady-state flow simulation system for an air distillation tower, which comprises a field intelligent instrument connected with the air distillation tower, a control station, a database and an upper computer, wherein the upper computer comprises a signal acquisition module used for acquiring data of the current production working condition, and a calculation master module used for calculating. A process comprises the following steps: 1) setting structural parameters and operating parameters of the tower, and specifying an initial value of feeding air flow; 2) assuming components of a liquid phase of each tower plate; 3) for each tower plate, respectively calculating the equilibrium temperature and components of a vapor phase by a bubble point method; 4) for eachtower plate, calculating enthalpies of the vapor phase and the liquid phase; 5) calculating the flow of the vapor phase and the liquid phase of each tower plate through formulas (1) and (2); and 6) judging whether the following formula (3) is established, if so, stopping iteration and outputting a result, otherwise, updating the components of the liquid phase of each tower plate. The invention also provides a steady-state flow simulation method for the air distillation tower. The steady-state flow simulation system and the steady-state flow simulation method can accurately simulate the steady-sate flow of the air distillation tower.

Description

technical field [0001] The invention relates to the field of air separation, in particular to a system and method for simulating a steady-state flow of an air separation tower. Background technique [0002] Oxygen, nitrogen and argon are widely used in the national economy of a country. The air contains about 78.12% nitrogen, 20.95% oxygen, 0.93% argon (volume content) and a small amount of carbon dioxide, neon, helium, hydrogen, atmosphere, water vapor (according to the humidity of the air), etc., which are used to produce oxygen, Feed gas for nitrogen, argon and other products. Cryogenic air separation (cryogenic air separation) uses the difference in the boiling point (volatility) of oxygen, nitrogen, argon and other components in the air to separate low-temperature liquid air by rectification to obtain high-purity oxygen, nitrogen, and argon products. [0003] The deepening of the energy crisis has strongly promoted the effective use of energy in many fields. In the a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 刘兴高林李飞
Owner ZHEJIANG UNIV