The Proposal Comparison of Absorbent Preparation System of Wet Limestone-gypsum Flue Gas Desulphurization Process

摘要

Taking a wet limestone-gypsum Flue Gas Desulphurization (FGD) operation data for example, the absorbent preparation system is compared based on different limestone supply way in 3 proposals: purchasing limestone powder outside, dry mill and wet mill. For dry mill vertical and horizontal type are further compared. This paper has given the operation feature of mill and main configuration comparison of 3 proposals, analyzed the initial investment and operation cost difference based on fixed assets, power consumption, main maintenance cost and price of absorbent. The advantages and disadvantages of 3 proposals are given based on comparison, also dry mill is considered more suitable for long distance absorbent preparation. The paper provides advices for the choice of FGD absorbent preparation system.