Low-cost and high-efficiency pollutant and CO2 synergistic absorption-desorption decoupling method

Abstract

The invention relates to a low-cost and high-efficiency pollutant and CO2 synergistic absorption-desorption decoupling method, which establishes a pollutant and CO2 synergistic absorption-desorption decoupling control optimization model under different working conditions, and takes low-cost and high-efficiency obtaining of high-purity liquid pollutants and CO2 as an optimization target. An adaptive penalty function is constructed to convert solution of a constrained optimization problem into an unconstrained optimization problem, and real-time, accurate and stable control of parameters is realized; and by means of flue gas pre-washing cooling, multi-stage intermediate cooling, tower top demisting and the like, efficient trapping of pollutants and CO2 is realized. According to the invention, the absorption process and the desorption process are decoupled, and coordinated regulation and control of each stage of temperature-pH-liquid-gas ratio and rich liquid flow-desorption temperature are carried out, so that efficient and low-energy-consumption coordinated capture-regeneration-concentration of pollutants and CO2 is realized, and the high cost of separated operation of an existing flue gas purification system and a carbon capture system is reduced.

Description

technical field [0001] The invention belongs to the technical field of air pollution control and carbon emission reduction, and specifically relates to a low-cost and high-efficiency pollutant and CO 2 Synergistic absorption-desorption decoupling method. Background technique [0002] Energy is the source of power for economic and social development and civilization progress. Since modern times, the large-scale development and utilization of fossil energy such as coal and oil has effectively improved the production efficiency of various countries, improved the way of life of human beings, and has enabled dozens of countries to realize modernization. However, environmental pollution, energy shortages, climate change and other issues have also become more prominent. The pollutants produced by coal combustion are one of the important causes of air pollution and severe global warming. Coal-fired units and industrial production consume a large amount of coal, and emit large amo...

AI Technical Summary

Problems solved by technology

However, this technology has the following disadvantages: the cost of solid absorbent is high; the regeneration temperature is as high as 150-300°C, and the energy consumption is high; the absorbed SO2 cannot be regenerated, and sulfur resources are excessively wasted

However, this technology has the following disadvantages: the high power consumption of cooling energy recovery leads to much higher energy consumption than traditional chemical absorption methods; the condensation process will produce SO2, CO2 and Impurities other than water vapor, low product purity

[0006] In order to reduce the high cost of separate operation of the existing flue gas purification system and the carbon capture system, develop a new type of absorption system with high absorption rate, large absorption capacity, and low desorption energy consumption Drugs are the most effective method, but due to technical difficulties, a large amount of experimental accumulation is required

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