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

A technology of emulsification shearing and technology, applied in chemical instruments and methods, aluminum halide, aluminum chloride, etc., can solve the problems of large amount of secondary hazardous waste sludge, increased production costs of enterprises, and increased outsourcing disposal costs, etc. , to achieve the effects of ensuring sustainable development, low equipment investment costs, high-tech content and innovation

Active Publication Date: 2022-01-14
CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Combine 300g of industrial by-product waste hydrochloric acid (HCl mass fraction is 12.75%) and 100g of aluminum-containing sludge from the aluminum profile industry (Al 2 o 3 The mass fraction is 16.35%) to carry out acid-dissolution reaction, stirring and reacting at normal temperature and pressure for 1h until the aluminum-containing sludge is completely dissolved to obtain Al 2 o 3 Aluminum brine with a mass fraction of 4.09% and a HCl mass fraction of 0.79%; add 0.2g of TMT liquid heavy metal scavenger, stir and react for 0.5h, and let it settle for 2h to obtain a light yellow supernatant containing aluminum mother liquor water; take the supernatant 325g of liquid aluminum-containing mother liquor water was placed in an emulsification shear mixer for high-speed emulsification shear stirring, and at the same time slowly added 84g of liquid waste alkali (Al 2 o 3 The mass fraction is 18.62%, and the NaOH mass fraction is 24.47%) to adjust the degree of polymerizat...

Embodiment 2

[0028] Combine 300g of industrial by-product waste hydrochloric acid (HCl mass fraction is 26.63%) and 100g of aluminum-containing sludge from the aluminum profile industry (Al 2 o 3 The mass fraction is 27.73%) to carry out the acid-dissolution reaction, stirring and reacting at normal temperature and pressure for 1.5h until the aluminum-containing sludge is completely dissolved to obtain Al 2 o 3 Aluminum brine with a mass fraction of 6.93% and a HCl mass fraction of 5.09%; add 0.4g of TMT liquid heavy metal scavenger, stir and react for 1 hour, and let it settle for 2.5 hours to obtain a light yellow supernatant liquid containing aluminum mother liquor; take the supernatant 327g of liquid aluminum-containing mother liquor was placed in an emulsification shear mixer for high-speed emulsification shear stirring, and at the same time slowly added 120g of liquid waste alkali (Al 2 o 3 The mass fraction is 18.62%, and the NaOH mass fraction is 24.47%) to adjust the degree of ...

Embodiment 3

[0030] 300g of industrial by-product waste hydrochloric acid (HCl mass fraction is 23.88%) and 100g of aluminum-containing sludge from the aluminum profile industry (Al 2 o 3 The mass fraction is 26.31%) to carry out the acid-dissolution reaction, stirring and reacting at normal temperature and pressure for 2 hours until the aluminum-containing sludge is completely dissolved to obtain Al 2 o 3 Aluminum brine with a mass fraction of 6.58% and a HCl mass fraction of 3.79%; add 0.8g of TMT liquid heavy metal scavenger, stir and react for 1 hour, and let it settle for 3 hours to obtain a light yellow supernatant liquid containing aluminum mother liquor; take the supernatant 299g of aluminum-containing mother liquor water is placed in an emulsifying shear mixer for high-speed emulsifying shear stirring, and at the same time slowly add 120g of liquid waste alkali (Al 2 o 3 The mass fraction is 18.62%, and the NaOH mass fraction is 24.47%) to adjust the degree of polymerization of...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/56C02F1/52
CPCC01F7/56C02F1/5236
Inventor 左选凤居银栋蒋银峰王桂玉
Owner CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS
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