A method for preparing slag-free pac by using high-efficiency emulsification shear stirring technology

Abstract

The invention discloses a method for preparing slag-free PAC by using high-efficiency emulsification shear stirring technology, comprising the steps of: acid dissolution, recapture, and emulsification shear stirring. The beneficial effects of the present invention are: use waste caustic soda to replace traditional bauxite soil resources, avoid dust pollution, and produce no secondary hazardous waste, and ensure product quality; use emerging high-efficiency emulsification shear stirring technology to quickly prepare PAC, The operation is simple, the processing capacity is large, the production cycle is short, the output is large, the energy consumption is low, and the investment cost of the equipment is low, and the cost is low; the resource regeneration and comprehensive utilization of aluminum-containing sludge, waste hydrochloric acid and waste alkali are realized, and waste is turned into treasure. It ensures the sustainable development of upstream enterprises, saves the production cost of enterprises, and realizes the double benefits of economy and environmental protection; the prepared slag-free PAC is pure and bright, stable in nature, good in fluidity and dispersibility, and can achieve higher salt Basic degree, the decolorization and turbidity removal ability is 5-10% stronger than that of general commercially available PAC.

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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