Basis of chemical phosphorus removalThe removal of phosphorus has two processes: chemical phosphorus removal and Biochemical disposal of phosphorus. The latter one is a relatively economical method of phosphorus removal. However, because the phosphorus removal process is currently not guaranteed to

China is the largest aquaculture country in the world. According to statistics from the Ministry of Agriculture in 2019, the total output of aquatic products in my country was 64.802 million tons. While my country's aquaculture industry has made great achievements, the direct discharge of a large am

The invention relates to a method for reproducing by utilizing polyaluminum chloride residue, which belongs to a chemical method.It is a method of extracting polyaluminum chloride by reacting a large amount of residue and lye produced after bauxite or calcium aluminate powder is reacted with acid solution to produce polyaluminum chloride.The invention has the advantages of reasonable method design, effective recovery of aluminum ions in the residue, effective reduction of environmental pollution and saving of production cost.

The invention relates to a method for co-producing polysilicon aluminum ferric sulfate and waste water treatment powder by using PAC residue, comprising the following steps: mixing PAC residue, catalyst and NaOH solution, filtering to obtain alkali-soluble filtrate and filter residue; preparing polysilicone by using alkali-soluble filtrate Aluminum ferric silicosulfate; use filter residue to prepare waste water treatment powder.The beneficial effects of the present invention are: using PAC waste residues to co-produce water purification products and waste water treatment powders can not only provide raw materials for the production of water purifier products, but also avoid the treatment cost of PAC residues, which belongs to waste treatment by waste and solid waste resources Chemical utilization; the product polysilicon aluminum ferric sulfate is used for sewage treatment, with rapid flocculation, large and solid flocs, fast sedimentation, wide application range, wide pH range for trial use, suitable for low temperature and low turbidity water, and has good decolorization and algae removal Effect: The product wastewater treatment powder has a certain adsorption performance on suspended organic pollutants in wastewater, and has good decolorization and COD removal effects on dye wastewater.

Technical Field The present invention relates to the field of polyaluminum chloride production, and in particular to a recycling device for polyaluminum chloride production waste slag.Background Art Polyaluminum chloride is a water purification material, an inorganic polymer coagulant, also referred to as polyaluminium, or PAC in English, and is produced due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions Inorganic polymer water treatment agents with larger molecular weight and higher charge.It can be divided into solid and liquid in form.The solid can be divided into brown, beige, golden yellow and white according to the color, and the liquid can be colorless and transparent, slightly yellow, light yellow to yellowish brown, and polyaluminum chloride of different colors has different advantages in application and production technology. big difference.The production of polyaluminum chloride includes: metal aluminum method, aluminum hydroxide method, aluminum trioxide method, aluminum chloride method; no matter which method is used, solid or powder raw materials will be used, and solid and powder raw materials are used In the process, there are often unfinished