Waste acid resourceful treatment process based on nano-composite carrier retarding method

A nano-composite and treatment process technology, applied in the direction of metallurgical wastewater treatment, filtration treatment, special treatment targets, etc., can solve the problems of low acid recovery rate, high operating cost, low recovery concentration, etc., and achieve high separation rate and low operating cost. Effect

Inactive Publication Date: 2016-09-21
SEEWATER ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, it needs to consume a large amount of alkali, the operation cost is high, and it will cause secondary pollution such as solid waste;
[0005] (2) Evaporation and concentration method: due to the high concentration of metal salts in the waste acid, it will be precipitated with the continuous concentration of the waste acid, and the precipitated metal salts will easily block the concentration device, making the waste acid concentration device unable to operate stably; at the same time, the evaporation concentration method Due to the high energy consumption, the treatment cost per ton of acid is high;
However, due to the acid retardation method has special requirements for the selected strong basic anion exchange resin, which requires uniform particle size and extremely small particle size, the current domestically produced strong basic anion exchange resin cannot meet this requirement, and can only be imported from abroad. Imported, leading to acid retardation method Due to the cost of the core acid retardation resin, its industrial application is limited
At the same time, the metal ion removal rate of the acid block method with strong basic anion exchange resin as the core is only 60%-70%. Some industries that require higher metal ion removal rates, such as titanium dioxide, hydrometallurgy, chemical industries such as
[0008] In summary, it can be seen that the processes currently promoted in the field of waste acid resource treatment have problems such as low acid recovery rate, low recovery concentration, low metal ion removal rate, high investment cost, high operating cost, and secondary pollution. problems, which greatly limit the promotion and application of the above methods in the industry

Method used

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  • Waste acid resourceful treatment process based on nano-composite carrier retarding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Suspension copolymerization

[0043] In a 3000L polymerization reactor, add 1,275kg of 4% NaCl solution by mass, add 2.5kg of polyvinyl alcohol with a polymerization degree of 1000 and an alcoholysis degree of preferably 80%, and heat to 55°C to make the polyvinyl alcohol fully Disperse in the solution; add 235kg of divinylbenzene, 265kg of styrene, 125kg of liquid wax, 125kg of toluene, 100kg of xylene, 2.5kg of benzoyl peroxide, and keep the temperature at 45~55℃. At the same time, the mixer is stirred at a constant speed of 800r / min for 1h.

[0044] After 1h, raise the temperature to 77℃ and keep it for 4h; then, raise the temperature to 87℃ and keep it for 3h; then raise the temperature to 97℃, keep it for 5h, and then release the NaCl solution in the reactor to prepare Copolymer sphere I.

[0045] (2) Washing and drying

[0046] The copolymer sphere I obtained in step 1 was transferred to a 3000L distillation kettle, and 1000kg of acetone and petroleum ether mixed li...

Embodiment 2

[0055] (1) Suspension copolymerization

[0056] In a 7000L polymerization reactor, add 5250kg of NaCl solution with a mass concentration of 6%, add 14kg of polyvinyl alcohol with a polymerization degree of 2000 and an alcoholysis degree of preferably 85%, and heat to 55°C to fully disperse the polyvinyl alcohol in Add 335kg of divinylbenzene, 365kg of styrene, 445kg of liquid wax, 345kg of toluene, 260kg of xylene and 7.7kg of benzoyl peroxide with a mass percentage of 60% in the solution; mix well and keep the temperature at 45~55℃. , The mixer is stirred at a constant speed of 1000r / min for 1h.

[0057] After 1h, raise the temperature to 77℃ and keep it for 4.5h; then raise the temperature to 87℃ and keep it for 3.5h; then raise the temperature to 97℃ and keep it for 6.5h, and then release the NaCl solution in the reactor , The copolymer sphere I was prepared.

[0058] (2) Washing and drying

[0059] The copolymer sphere I obtained in step 1 was transferred to a 3000L distillation...

Embodiment 3

[0068] (1) Suspension copolymerization

[0069] In a 5000L polymerization reactor, add 4400kg of NaCl solution with a mass concentration of 5%, add 10kg of polyvinyl alcohol with a degree of polymerization of 1500 and an alcoholysis degree of preferably 83%, and heat to 55°C to fully disperse the polyvinyl alcohol in In the solution; add 70% by mass of divinylbenzene 400kg, styrene 600kg, liquid wax 450kg, toluene 400kg, xylene 350kg, benzoyl peroxide 10kg, mix well, keep the temperature at 45~55℃, at the same time, The mixer is stirred at a constant speed of 900r / min for 1.5h.

[0070] After 1.5h, raise the temperature to 77℃ and keep it for 5h; then, raise the temperature to 88℃ and keep it for 4h; then raise the temperature to 97℃ and keep it for 7h, then release the NaCl solution in the reactor to prepare The copolymer sphere I was obtained.

[0071] (2) Washing and drying

[0072] The copolymer sphere I obtained in step 1 was transferred to a 3000L distillation kettle, and 1200...

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Abstract

The invention discloses a waste acid resourceful treatment process based on a nano-composite carrier retarding method. The process comprises the following steps that primary filtration is carried out, wherein acid pickle is filtrated, and suspended matter, oil and colloidal matter in the acid pickle are separated out primarily; secondary filtration is carried out, wherein a secondary filter is used for further removing residual particles in primary filtration penetrating liquid; acid retarding separation is carried out, wherein the filtrated acid pickle is treated through an acid retarding separation device which contains an acid retarding carrier SEW-501, and the carrier carries sulfonate radical and a quaternary ammonium group; when the acid pickle passes through the acid retarding separation device, acid molecules in the acid pickle are retarded on the acid retarding carrier, other impurities in the acid pickle penetrate through the acid retarding carrier to flow out of the acid retarding separation device in the mode of penetrating liquid, and therefore acid modules in the acid pickle are retarded in the acid retarding separation device; after the acid retarding carrier is saturated, resolving water is pumped into the acid retarding separation device to dissolve out acid modules in the acid retarding carrier, and finally pure acid is produced.

Description

Technical field [0001] The invention relates to a waste acid resource treatment process based on a nano composite carrier block method, in particular to a waste acid resource recovery process in metal surface treatment, hydrometallurgy, chemical and other industries, and belongs to the technical field of industrial waste acid resource recovery . The invention also relates to an industrial waste acid resource recovery treatment device. Background technique [0002] With the shortage of energy, shortage of resources and serious environmental pollution, environmental protection has become a global problem and has attracted the attention of all society and mankind. In the metal surface treatment, hydrometallurgy, chemical and other industries, a large amount of waste acid is produced during the production process. For example, in the metal finishing industry, strong inorganic acids such as sulfuric acid, nitric acid, and hydrochloric acid are commonly used to remove metal surface ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F103/16
CPCC02F1/001C02F1/44C02F1/444C02F9/00C02F2103/16C02F2301/08C02F2303/16
Inventor 王文波王颜亭
Owner SEEWATER ENVIRONMENTAL ENG
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