发明名称 |
METHOD FOR AMMONIA RECOVERY |
摘要 |
<p>An improved method for recovering ammonia from spent ammonia-base sulfite pulping liquor includes steam stripping spent ammonia and condensing the resulting vapor to produce a dilute ammonia or ammonium hydroxide solution. This dilute solution is passed through a cation exchange column to produce an ammonium sulfite-ammonium bisulfite solution which is delivered to a sulfur dioxide absorption tower to thereby produce a concentrated ammonia-base sulfite cooking liquor. The residual liquor from the stripping step and the non-condensable gases are burned as fuel and the waste gases from this burning, which contain a small percentage of sulfur dioxide, are delivered to the absorption tower and subsequently discharged to the atmosphere free of sulfur dioxide and ammonia.</p> |
申请公布号 |
CA1163424(A) |
申请公布日期 |
1984.03.13 |
申请号 |
CA19810381074 |
申请日期 |
1981.07.03 |
申请人 |
COMBUSTION ENGINEERING, INC. |
发明人 |
JACOBS, LAWRENCE J.;BOZZUTO, CARL R. |
分类号 |
D21C11/02;D21C11/06;(IPC1-7):D21C11/02 |
主分类号 |
D21C11/02 |
代理机构 |
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