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Method for modeling HI concentrating rectifying tower in iodine-sulfur circulating hydrogen production

A modeling method and technology of rectification tower, which is applied in the field of modeling of HI-I2-H2O system and homogeneous azeotropic distillation tower, can solve problems such as poor efficiency of HI concentration, separation and rectification

Inactive Publication Date: 2018-04-20
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a modeling method of the HI concentrated rectification tower in the iodine-sulfur cycle hydrogen production, the construction of the HI concentrated rectification tower in the iodine-sulfur cycle hydrogen production The model method should solve the technical problems of poor rectification efficiency and optimal design of the rectification tower in the process of iodine-sulfur cycle hydrogen production in the prior art

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  • Method for modeling HI concentrating rectifying tower in iodine-sulfur circulating hydrogen production
  • Method for modeling HI concentrating rectifying tower in iodine-sulfur circulating hydrogen production

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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] attached figure 1 It is a flow chart of the HI concentrated rectification of a certain EED process, the raw material liquid (HI and H obtained from the Bunsen reaction 2 SO 4The mixed solution) F1 is divided into two streams F2, F3 into the anode and cathode of the EED respectively, and the stream treated by the EED process, because HI is enriched on the cathode side and the cathode side of the outlet fluid, the stream F9 is It is returned to the Bunsen reaction to make the raw material liquid, the stream F8 on this side enters the heat exchanger, and then the stream is heated by the heat exchanger to reach the bubble point temperature, and the stream 11 enters the rectification column, and the overhead distillation Produce high-purity HI, the F13 stream of high-purity HI provides raw materials for the decomposition reaction, and produces a lar...

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Abstract

The invention provides a method for modeling an HI concentrating rectifying tower in iodine-sulfur circulating hydrogen production. Rectification is achieved when HI concentrating and separating are performed in iodine-sulfur circulating hydrogen production. An NRTL model is selected to correct the liquid-phase imperfection of a ternary mixture in an HI-I2-H2O system, binary gas-liquid balance experimental data of an H2O-HI-H2O-I2 system and an HI-I2 system are combined, and binary interaction parameter in NRTL model expressions of the three systems are correlated. With simulation software AspenPlus, systematic simulation design is performed on the HI rectifying tower, key operation parameters are analyzed and optimized, and then optimized operation conditions are obtained; by analyzing sensitivity, influences on separation conditions of the plate number, reflux ratio and feedstock components of the HI rectifying tower are investigated, the optimal value is determined, and a theoretical basis is provided for further research on the process technique of industrial iodine-sulfur circulating hydrogen production.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a modeling method of a homogeneous azeotropic rectification tower, especially HI-I 2 -H 2 O system, modeling method of HI enrichment rectification column in iodine-sulfur cycle hydrogen production. Background technique [0002] Hydrogen energy is regarded as the clean energy with the most development potential in the 21st century, and it has high volatility and high energy. It is an energy carrier and fuel. At the same time, hydrogen is also widely used in industrial production. But today, most of the hydrogen is still derived from fossil fuels such as coal, oil, and natural gas. The clean, efficient, and sustainable mass production of hydrogen has always troubled people. [0003] Under standard pressure, the decomposition reaction of water needs to be higher than 2500K to be more obvious. The method of thermochemical cycle can greatly reduce the operating conditions. The therm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16C20/10
Inventor 黄秀辉王俊
Owner UNIV OF SHANGHAI FOR SCI & TECH
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