Magnetcisuspension polycoagulant, preparation method and application

A technology of coagulant and magnetic suspension, which is used in flocculation/sedimentation water/sewage treatment, etc., can solve the problems of restricting the application of rare earth disks, and achieve the effects of high oil removal and turbidity reduction, short treatment process, and small footprint.

Inactive Publication Date: 2007-08-08
北京博泰盛合科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metallurgical industry sewage often contains not only magnetically conductive suspended solids, especially steel rolling sewage, but also contains a certain amount of oil. Non-magnetic suspended solids and oil cannot be treated by rare earth disks, which limits the application of rare earth disks in sewage treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Magnetic suspension coagulant 1130 kg, prepared from 550 kg of 10% polyacrylic acid liquid with a molecular weight of 6 million to 8 million, 300 kg of 30% polyaluminum silicate solution, 50 kg of ferrous hydroxide, 30 kg of diatomaceous earth, and 200 kg of water made. The steps to prepare the magnetic suspension coagulant are: (1) add 200 kg of water and 550 kg of polyacrylic acid liquid into the reaction kettle and stir evenly; (2) add 50 kg of ferrous hydroxide and heat to 50°C to generate polyacrylic acid (3) add 30 kilograms of diatomite, stir, and the stirring speed is 200 rpm, and the stirring time is 25 minutes, so that it is fully mixed; (4) add 300 kilograms of polysilicate aluminum solution, stir, and the stirring speed is 200 rev / min, the stirring time is 80 minutes to make the magnetic suspension coagulant.

[0011] Taking a steel rolling mill as an example, the application and effect of the magnetic suspension coagulant in cooperating with rare earth dis...

Embodiment 2

[0024] 85 kg of magnetic suspension coagulant, prepared from 30 kg of 6% polyacrylic acid liquid with a molecular weight of 6 million to 8 million, 40 kg of 21% polyaluminum silicate solution, 3 kg of ferrous hydroxide, 2 kg of diatomaceous earth, and 10 kg of water made. The steps to prepare the magnetic suspension coagulant are: (1) add 10 kg of water and 30 kg of polyacrylic acid liquid into the reaction kettle, and stir evenly; (2) add 3 kg of ferrous hydroxide, and heat to 45°C to generate polyacrylic acid (3) add 2 kilograms of diatomite, stir, and the stirring speed is 180 rpm, and the stirring time is 20 minutes, so that it is fully mixed; (4) add 40 kilograms of polysilicate aluminum solution, stir, and the stirring speed is 180 rev / min, stirring time is 60 minutes to make the magnetic suspension coagulant. The magnetic suspension coagulant can be used with rare earth disk equipment to treat sewage containing suspended solids and oil, such as sewage treatment in iron...

Embodiment 3

[0025] Embodiment 3: 129 kilograms of magnetically suspended coagulants, 60 kilograms of polyacrylic acid liquid, 20 kilograms of 40% polyaluminum silicate solution, 9 kilograms of ferrous hydroxide, 10 kilograms of diatomaceous earth by 13% molecular weight at 6 million to 8 million polyacrylic acid liquids, Made of 30kg of water. The steps to prepare the magnetic suspension coagulant are: (1) add 30 kg of water and 60 kg of polyacrylic acid liquid into the reaction kettle and stir evenly; (2) add 9 kg of ferrous hydroxide and heat to 69°C to generate polyacrylic acid (3) add 10 kilograms of diatomite, stir, and the stirring speed is 235 rpm, and the stirring time is 30 minutes, so that it is fully mixed; (4) add 20 kilograms of polysilicate aluminum solution, stir, and the stirring speed is 235 rev / min, the stirring time is 85 minutes to make the magnetic suspension coagulant. The magnetic suspension coagulant can be used with rare earth disk equipment to treat sewage conta...

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Abstract

This invention discloses the preparation and application of a magnetic suspension flocculant, which is composed of 30-60 portions of 5-15% polyacrylic acid solution (molecular weight 600,000,000-800,000,000), 20-40 portions of 20-40% polyaluminum silicate solution, 2-10 portions of ferrous hydroxide, 2-10 portions of diatomite and 10-30 portions of water. The flocculant exhibits good performance in flocculation as well as in oil removing. The flocculant of this invention can flocculate the magnetic and non-magnetic particles in the water into large grains, and can absorb the oil from the water, which can then be removed with rare earth magnetic discs. The combination of rare earth magnetic discs and the magnetic suspension flocculant has such advantages as a short processing flow, a small floor area, a low cost and a high oil-removing rate, which can be widely used for treating wastewater containing suspended substances and oil.

Description

technical field [0001] The present invention relates to a coagulant, more specifically to a magnetic suspension coagulant used in oily sewage to reduce the content of oil and suspended solids. application in sewage treatment. Background technique [0002] Rare earth disk equipment uses magnetic suction drums to absorb magnetically conductive particles in water to remove suspended solids in water and is used in sewage treatment. The structure of the rare earth disk magnetic suction drum is that half of the area of ​​the drum is made of magnetic material, and the other half is made of non-magnetic material. Half of the drum is immersed in sewage. In the position immersed in water, the bracket removes the suspended matter and achieves the purpose of cleaning the water. Rare earth disk equipment is mainly used in the sewage treatment of metallurgical industry containing magnetically conductive particles. The magnetically conductive substances are mainly iron slag and iron oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
Inventor 董志强
Owner 北京博泰盛合科技有限公司
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