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Prediction of cavity size in the packed bed systems using new correlations and mathematical model

一种相互关系、数学模型的技术，应用在空腔的尺寸领域，能够解决没有预测空腔尺寸、鼓风速率燃烧空窝深度下降、不能显示滞后现象的结果等问题

Inactive Publication Date: 2007-07-11
INDIAN INST OF SCI & IND
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Problems solved by technology

The disadvantages of their proposed simplified model are: (1) It is based on the arbitrary assumption that the stress in the moving bed varies radially
(3) Limited to the analysis of the growth of the cavity before the termination of the solids flow in the moving bed
The disadvantages of their model are: (1) they assume that the frictional force always acts in the upward direction
(2) They cannot show any hysteresis in the results
(3) They ignore any acceleration effects due to the deceleration of the gas
(4) The size of the cavity is not predicted
Once the friction force acting in the upward direction is fully applied, a further reduction in the blast rate will result in a decrease in the depth of the combustion cavity

Method used

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  • Prediction of cavity size in the packed bed systems using new correlations and mathematical model
  • Prediction of cavity size in the packed bed systems using new correlations and mathematical model
  • Prediction of cavity size in the packed bed systems using new correlations and mathematical model

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Embodiment Construction

[0019] The present invention provides a computer-based method for determining the size of a cavity in a packed bed system using a correlation or mathematical model, said method comprising the steps of:

[0020] a) obtaining data on the material properties of the packed bed system;

[0021] b) Using the mathematical model that introduces stress / friction force, calculate the cavity radius when the gas velocity rises and the gas velocity decreases, expressed as:

[0022] 2 n R 2 - 2 nHR + prβ v b 2 D T 2 2 π 2 M { ln W 2 π - ...

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Abstract

The present invention relates to prediction of cavity size in the packed bed systems using new correlations and mathematical model and more particularly, using simplified equations, based on analytical solution of one-dimensional mathematical model, that have been developed along with the cavity correlations to describe the cavity size and hysteresis that give a universal approach to predict the cavity size which is applicable to any packed bed systems like blast furnaces, cupola, Corex, catalytic regenerator, etc. and is able to represent, in a good way, the data of other researchers provided the frictional properties of the particulate are known.

Description

technical field [0001] The present invention involves the use of novel correlations and mathematical models to predict the size of cavities in packed bed systems. According to the relationship between the cavities describing the cavity size and hysteresis, and based on the analysis and solution of the one-dimensional mathematical model, a simplified equation is developed. The proposed correlation and mathematical model give a general method for predicting the cavity size, which can be applied in any packed bed system, such as blast furnaces, iron melting furnaces, smelting reduction furnaces, catalytic regenerating furnaces, etc., and Data from other researchers can be well represented when the particle friction properties are known. The interrelationships and models developed can be directly used to optimize the above and other related processes. Background technique [0002] About packed beds: The contact forces between particles and wall particles inside packed beds hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/006
Inventor 戈文德·沙伦·格普塔
Owner INDIAN INST OF SCI & IND
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