| 摘要 |
The process comprises passing fumes to be purified through a gas-solid separator (101), introducing a fraction (40-95%) of solid waste (4) obtained from the separator, a reagent (8) constituted of alkaline earth oxide of which a flow is 0.5-10% of a flow of the fraction of solid wastes and a gas stream (7) containing 50-100 vol.% of water at an inlet of a slaking reactor (102), and recycling the solids obtained from the reactor towards the separator. A passing time of solids in the reactor is 1-6 minutes. The process comprises passing fumes to be purified through a gas-solid separator (101), introducing a fraction (40-95%) of solid waste (4) obtained from the separator, a reagent (8) constituted of alkaline earth oxide of which a flow is 0.5-10% of a flow of the fraction of solid wastes and a gas stream (7) containing 50-100 vol.% of water at an inlet of a slaking reactor (102), and recycling the solids obtained from the reactor towards the separator. A molar stoichiometric ratio, which is defined as the number of moles of water per hour of the gas flow, divided by the number of moles per hour of the reagent is 3-10. A passing time of solids in the reactor is 1-6 minutes. During the passing of solids in the reactor, the mixture of the solid residue fraction and the reagent is contacted with the gas flow. The reagent consists of quicklime. The gas stream is constituted of desuperheating steam at a pressure of 1-5 bar and a temperature of 30[deg] C. The mixture of solid residue fraction and reagent has a temperature of 110[deg] C at the inlet of the slaking reactor. An independent claim is included for a device for purifying combustion fumes. |
