Method for preparing slag-free PAC by means of high-efficiency emulsification shear stirring technology

Abstract

The invention provides a method for preparing slag-free PAC by means of a high-efficiency emulsification shear stirring technology. The method comprises the steps of acid dissolution, recapturing andemulsification shear stirring. The method has the advantages that waste alkali is used for replacing traditional bauxite resources, dust pollution is avoided, no secondary hazardous waste is generated, and the quality of products is ensured; the PAC is quickly prepared by means of the novel high-efficiency emulsification shear mixing technology, the operation is simple, the processing capacity islarge, the production cycle is short, the yield is high, the energy consumption is low, the equipment investment cost is low, and the cost is low. Regeneration and comprehensive utilization of resources including aluminum-containing sludge, waste hydrochloric acid and waste alkali are achieved, waste is turned into treasure, sustainable development of upstream enterprises is ensured, the production cost of the enterprises is saved, and double benefits of economy and environmental protection are achieved. The prepared slag-free PAC is pure, clear, stable in quality, good in fluidity and dispersibility and capable of achieving higher basicity, and the decolorization and turbidity removal capabilities of the PAC are 5-10% times higher than those of general PACs sold on the market.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of solid waste disposal and resource regeneration, relates to the technical transformation of a slag-free PAC in the technical field of sewage treatment, and specifically relates to a method for preparing a slag-free PAC using a high-efficiency emulsification shear stirring technology. Background technique [0002] Polyaluminum chloride is a water purification material, inorganic polymer coagulant, also referred to as polyaluminum, English abbreviation is PAC, the molecular weight produced due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions Larger, higher charge inorganic polymer water treatment agent. The fundamental difference between polyaluminum chloride and traditional inorganic coagulants is that traditional inorganic coagulants are low-molecular crystalline salts, while the structure of polyaluminum chloride is composed of polyvalent ca...

AI Technical Summary

Problems solved by technology

Although this technology is clean, green and environmentally friendly, it can effectively prevent secondary pollution, make full use of waste resources, turn waste into treasure, and achieve the purpose of comprehensive utilization of waste recycling, ensuring the sustainable development of upstream enterprises and saving production costs. The dual benefits of economy and environmental protection have been realized, but this technology also has the following defects: (1) It needs to consume a large amount of mineral resources, and the scarcity of mineral resources has led to the skyrocketing price of raw materials, which eventually inevitably leads to enterprises Increase in production costs; (2) The amount of secondary hazardous waste sludge is large, difficult to handle, and easily causes secondary sludge, and at the same time increases the cost of outsourcing disposal by the enterprise; (3) The process operation is relatively complicated, and the dust in the production process Pollution is serious and can easily endanger human health

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