一种重金属污泥的无害化处置及资源化利用工艺
By preparing a magnetic heavy metal adsorbent and combining it with celery seeds and illite to form a heavy metal adsorption colloidal solution, the problems of secondary pollution and low resource utilization efficiency in phosphorus recovery from sludge incineration ash were solved, achieving efficient and environmentally friendly phosphorus resource recovery and sludge resource utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG HUIZE ENVIRONMENTAL PROTECTION NEW MATERIALS CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for recovering phosphorus from sludge incineration ash suffer from problems such as secondary pollution from chemical reagents, high processing costs, and cumbersome processes. Furthermore, the adsorption rate of ordinary adsorbents is insufficient, making it difficult to achieve efficient resource utilization of sludge.
By preparing a magnetic heavy metal adsorbent, nano-magnetic particles were obtained by reflux reaction of acetylacetone iron, 1,2-dodecanediol, anhydrous ethanol, oleic acid oleylamine and dibenzyl ether. These particles were then combined with celery seeds and illite to form a heavy metal adsorption colloidal solution. The pH value was adjusted using a single reagent to achieve efficient adsorption of heavy metals and gradual precipitation of phosphorus.
It achieves harmless disposal and resource utilization, avoids secondary pollution from chemical reagents, improves the resource utilization efficiency of sludge, simplifies the process flow, and produces products including lithium iron phosphate and ammonium chloride fertilizers, which have the potential for high purity and efficient resource utilization.
Smart Images
Figure CN120483476B_ABST