High-stability magnesium-ferrous composite flocculating agent and production technology thereof

A composite flocculant, high stability technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of decreased drug efficacy, increased sulfuric acid, difficult to dissolve, etc., achieve high COD removal rate, large specific surface area, and easy operation simple effect

Inactive Publication Date: 2012-09-12
林益立
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unsolvable problems of this process are: serious foaming of the drug solution during production, more precipitation and hardening of basic ferric sulfate during drug storage, frequent repairs and cleaning of drug storage tanks and drug pumping equipment are required
[0011] The magnesium ferrous flocculant of brine + ferrous ferrous has not yet been commercially used in large quantities. The reason is that: because industrial ferrous sulfate is easily oxidized into insoluble basic ferric sulfate during storage, the medicine directly prepared with water is turbid and has a large number of fine particles. Precipitated yellow-green ferrous sulfate aqueous solution, it is difficult to dissolve these precipitates by conventional methods of adding sulfuric acid to increase acidity
When using brine as a solvent and adding ferrous sulfate to dissolve, a large amount of green precipitates will also be formed. Even if sulfuric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: The production formula commonly used in the treatment of floc folding plate settling tanks:

[0053] Take 0.2 tons of yellow-green industrial-grade ferrous sulfate heptahydrate and put it in a plastic tank, put it into a plastic tank and directly dilute it with brine to 50-60 kg of hydrochloric acid with a concentration of 15%, and complex and mature it at room temperature for 3 hours, and then it will form a brownish yellow color. A mixture of clearer viscous liquid and green ferrous sulfate crystals. Add an appropriate amount of hydrogen peroxide with an appropriate concentration to the mixture to oxidize part of the ferrous ions into iron ions. After preliminary observation, when about 0.1 tons of ferrous sulfate heptahydrate crystals remain in the mixed material and have not been oxidized, the complexing and aging process ends. Now add 1 ton of salt brine with a Baume degree of about 1.27 while stirring, and stir to completely dissolve the ferrous sulfate...

Embodiment 2

[0055] Embodiment 2: the production recipe that is suitable for floc air flotation tank processing:

[0056] Take 0.125 tons of microstrip yellow industrial grade ferrous sulfate heptahydrate and put it in a plastic tank, put it into 35 kg of hydrochloric acid with a concentration of 10% and directly dilute it with brine, and complex and ripen it at room temperature for 5 hours. At this time, a yellow-green clear A mixture of viscous liquid and green ferrous sulfate crystals. At this time, the complexation and aging process is over. Add 1 ton of salt brine with a Baume degree of about 1.25 while stirring, and stir to completely dissolve ferrous sulfate heptahydrate into a yellow-green liquid. At this time, use 200-mesh iron powder adsorbed on a magnet coated with anti-acid material in advance as a stabilizer, put it into a yellow solution for reduction, and quickly adjust the ratio of ferric iron:total iron to below 0.05:1, A clear solution with a very pale yellow color was o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a production technology of a high-stability magnesium-ferrous composite flocculating agent. The flocculating agent comprises 100 weight parts of brine, 5 to 20 weight parts of industrial grade ferrous sulfate heptahydrate, and 0.2 to 5 weight parts of hydrochloric acid. The production technology comprises the following steps of: putting the industrial grade ferrous sulfate heptahydrate into an anticorrosive tank, and adding the industrial hydrochloric acid which is diluted by 2 to 5 times through the brine for complexing and curing; slowly adding the brine into the cured solution with stirring; regulating the pH value of the solution to be between 1 and 3 by using a salt or a weakly alkaline substance; putting micro iron powder which attracts a magnet and is used as a stabilizer into the solution, performing reduction reaction, and quickly regulating the proportion of divalent iron to trivalent iron; and sealing and preserving the solution. The flocculating agent is high in stability, and can overcome the defects that the solution is foamed and overflows a reactor when the iron powder is added for oxidation resistance and the residue blocks a conveying pipeline in the prior art.

Description

【Technical field】 [0001] The invention relates to a high-stability magnesium-ferrous composite flocculant and a production process thereof. 【Background technique】 [0002] Flocculant is a chemical used for sewage purification. Common flocculants in industry include aluminum salt flocculants, which are suitable for treating sewage with a pH of 5-9, poor decolorization ability, poor ability to remove heavy metals, and high biological toxicity; iron salt flocculants are suitable for treatment PH3-11 sewage has poor decolorization ability and effluent chroma; ferrous salt flocculant is suitable for treating PH8-12 sewage and effluent chroma is very poor; polyacrylamide flocculant is basically suitable for the treatment of all sewage , but it should be used in conjunction with flocculants; aluminum-iron, aluminum-ferrous composite flocculants, etc., and their preparation processes are relatively mature. There are other flocculants, such as biological flocculants, silicic acid fl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/52
Inventor 陈楷翰许煜兴林益立袁建军
Owner 林益立
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap