发明名称 |
VERFAHREN ZUR ENTSORGUNG VON KLAERSCHLAMM AUS EINER BIOLOGISCHEN ABWASSERREINIGUNGSANLAGE |
摘要 |
<p>In a process for the disposal of settled sludge derived from a biological sewage-disposal plant, in which the thickened sludge is further dewatered and at least partially thermically decomposed within a centrifuge (15) by using separated steam, preferably at a pressure within the range of 1 to 15 bar and at a temperature of 100 DEG C. to 200 DEG C., the centrifugate of the centrifuge (15) subjected to the action of saturated steam is discharged via a lock (18) and is immediately subsequently subjected to a sulfidic precipitation (19) of heavy metals. The solid matter separated within the centrifuge (15) is simultaneously discharged via locks (28) and optionally is subjected to a post-drying step (33) and at least partially to a combustion, for example a fluidized bed combustion (23), for steam production (17) for the centrifuge (15), noting that the steam is completely circulated along a closed circuit and the waste steam of the locks is used for air-heating (30), whereupon condensate formed is supplied to the pre-settling basin (5) of the sewage-disposal plant, whereby the energy requirement is reduced and the environmental load is equally reduced.</p> |
申请公布号 |
DD253607(A5) |
申请公布日期 |
1988.01.27 |
申请号 |
DD19850284396 |
申请日期 |
1985.12.16 |
申请人 |
VOEST-ALPINE AG,AT |
发明人 |
JANUSCH,ALOIS,AT;LUGSCHEIDER,WALTER,AT;LUDEWIG,FRITZ,AT |
分类号 |
C02F1/38;C02F1/52;C02F11/12;C02F11/18;(IPC1-7):C02F11/18;C02F11/06 |
主分类号 |
C02F1/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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