| 摘要 |
<p>PURPOSE:To completely prevent the deposition of scales and residue in a circulating line as a factor of clogging in a desulfurization tower and to reduce the cost by using inexpensive soft-burned magnesium oxide as the material for the desulfurizing agent. CONSTITUTION:A slurry of the fine particles of high-purity and highly reactive magnesium hydroxide is supplied to the latter part A2 of a desulfurization tower A, the processing soln. is kept at pH 6-8, hence the sulfur oxides remaining in the waste gas G2 are sufficiently absorbed, and an almost perfect desulfurization reaction is attained. The processing soln. having absorbed the sulfur oxides in the tower A, ordinarily the processing soln. in the latter part A2, is introduced into the former part A1 through a pump P6 and a pipeline L6, moved countercurrently to the waste gas and discharged outside the system from the former part A1 through a discharge pipe 10. The discharged soln. is ordinarily introduced into an oxidation lower 12, the MgSO4 and Mg(HSO3)2 in the soln. are oxidized in the tower, and an aq. soln. of MgSO4 is obtained.</p> |
