CO2 chemical absorption system and method for reinforcing waste heat recovery of hydrophilic and hydrophobic double-membrane heat exchangers

Abstract

The invention discloses a CO2 chemical absorption system and method for reinforcing waste heat recovery of hydrophilic and hydrophobic double-membrane heat exchangers. The CO2 chemical absorption system for reinforcing waste heat recovery of the hydrophilic and hydrophobic double-membrane heat exchangers comprises CO2 absorption equipment, CO2 recovery equipment, a rich solution pump, a lean solution pump, a lean solution cooler, a diverging three way valve, a rich and lean solution heat exchanger, a booster fan and a regenerated gas waste heat recovery unit. The CO2 chemical absorption systemfor reinforcing waste heat recovery of the hydrophilic and hydrophobic double-membrane heat exchangers, disclosed by the invention, has the advantages that water vapor and liquid water can be correspondingly and effectively recovered for different working conditions by combining the hydrophilic-membrane heat exchanger and the hydrophobic-membrane heat exchanger as a heat exchanging medium betweenthe regenerated gas and a cold rich solution; convective heat exchange reinforcing from the regenerated gas to the cold rich solution is realized from two aspects of sufficiently utilizing water vapor latent heat and promoting water vapor / liquid water transfer enhancement convective heat exchange. Therefore, the waste heat recovery efficiency of the regenerated gas is greatly enhanced; moreover,multiple combination modes are also suitable for waste heat recovery demands in large-scale industrial application.

Description

technical field [0001] The present invention relates to enriched CO 2 CO in gas 2 The technical field of chemical absorption process energy saving and consumption reduction, specifically refers to a kind of CO 2 Chemical absorption systems and methods. Background technique [0002] Climate change has become a hot issue of concern to the international community. In order to keep the global average temperature rise in this century below 1.5°C compared with pre-industrial levels, governments of all countries are actively formulating carbon emission reduction policies. Carbon capture and storage (CCS) technology, as one of the key technologies to significantly reduce greenhouse gas emissions in the near future, has become the focus of attention. The key lies in the CO 2 separation. In many CO 2 In the separation technology, CO using organic amines such as ethanolamine as absorbents 2 The chemical absorption carbon capture process has mature technology, simple operation, lo...

AI Technical Summary

Problems solved by technology

However, in order to avoid the mixing of hot and cold fluids, the heat transfer method of conventional heat exchangers is still limited to heat conduction

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