Mechanochemical preparation method and equipment of magnetic water treatment agent

A mechanochemical and treatment agent technology, applied in chemical instruments and methods, biological water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of water yellowing, complex finished products, high energy consumption, etc., and achieve good mixing The effects of condensation adsorption, good magnetic response, and simple process

Active Publication Date: 2012-11-28
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the liquid ferric sulfate product is not convenient for transportation and storage, it is necessary to further dry the liquid ferric sulfate to obtain solid ferric sulfate. The drying process consumes a lot of energy and costs high. At the same time, the use of the iron salt flocculant will cause the water body to turn yellow, which itself has relatively high strong corrosive
[0006] The invention patent with the authorized notification number CN100335420C discloses a "one-step" production method of composite polyferric sulfate, adding magnetic pyrite slag, dilute sulfuric acid and calcium carbonate additives into the reaction kettle, and the Heat, pressurize and stir at 150°C. After the reaction is completed and cooled, the solid polyferric sulfate product is obtained after cooling, solidification, drying, and crushing. Although the "one-step" process overcomes the traditional acid-soluble and drying process in the preparation of coagulants The two-step process, but it has not fundamentally solved the problem of coagulation after the reaction of magnetic powder with acid. In actual operation, it is still necessary to wait for the bulk material to expand and solidify, and then dry and pulverize to obtain the finished product.

Method used

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  • Mechanochemical preparation method and equipment of magnetic water treatment agent
  • Mechanochemical preparation method and equipment of magnetic water treatment agent
  • Mechanochemical preparation method and equipment of magnetic water treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, add 120 kg of magnetite powder to the 500L volume cylinder, wherein the magnetite powder has a moisture content of less than 3%, a particle size of 200-325 mesh, more than 85%, and an iron content of 65%. Then add glass The ball is 300 kg, and the glass ball gradation is as follows: Φ18mm accounts for 20% of the total weight of the ball milling medium, Φ12mm accounts for 35% of the total weight of the ball milling medium, and Φ10mm accounts for 45% of the total weight of the ball milling medium. After covering the cover plate, start the variable frequency speed regulating motor that drives the cylinder to rotate. The rotation speed of the cylinder is 25 rpm. While rolling the material, slowly start the variable frequency speed regulating motor that drives the internal rotation stirring device to perform stirring and mixing ball milling. , the rotational speed of the inner rotating stirring shaft is 70 rev / min. Circulate hot water into the jacket of the cylinder, ...

Embodiment 2

[0043] First, add 90 kg of iron oxide scale to the 500L volume horizontal double-rotation mixing equipment. The moisture content of the iron oxide scale is less than 2%, the particle size is 200-450 mesh, accounting for more than 85%, and the iron content is 71.5%. Then add agate balls. 250 kg, the agate ball gradation is: Φ14mm accounts for 25% of the total weight of the ball milling media, Φ12mm accounts for 45% of the total weight of the ball milling media, Φ8mm accounts for 30% of the total weight of the ball milling media. After covering the cover, start the variable frequency speed regulating motor that drives the cylinder to rotate. The rotation speed of the cylinder is 40 r / min. While rolling the material, slowly start the variable frequency speed regulating motor that drives the internal rotation stirring device for stirring and mixing ball milling. , the rotational speed of the inner rotating stirring shaft is 70 rev / min.

[0044] Circulate hot water into the jacket ...

Embodiment 3

[0046] First, add 100 kg of iron oxide scale to the 500L volume horizontal double-rotation mixing equipment. The moisture content of the iron oxide scale is less than 1%, the particle size is 200-450 mesh, accounting for more than 80%, and the iron content is 72%. Then add zircon. The ball is 280 kg, and the zircon ball gradation is: Φ16mm accounts for 20% of the total weight of the ball milling medium, Φ12mm accounts for 40% of the total weight of the ball milling medium, and Φ8mm accounts for 40% of the total weight of the ball milling medium. After covering the cover plate, start the variable frequency speed regulating motor that drives the cylinder to rotate. The rotating speed of the cylinder is 30 rpm. While rolling the material, slowly start the variable frequency speed regulating motor that drives the internal rotation stirring device to perform stirring and mixing ball milling. , the rotational speed of the inner rotating stirring shaft is 60 rev / min.

[0047] Circula...

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Abstract

The invention discloses a mechanochemical preparation method and equipment of a magnetic water treatment agent. The preparation method comprises the following steps of: (1) adding magnetic powder and a ball milling medium in a mass ratio of 1: (2-4) to the cylinder of horizontal double-screw stirring mixing equipment, vacuumizing the inner space of the cylinder, driving a horizontally arranged rotating shaft to drive the cylinder into rotation, and performing stirring type ball milling through an internal-rotation stirring stick arranged in the cylinder in opposition to the rotation direction of the cylinder; (2) spraying an atomized modifier into the cylinder through the cavity of the rotating shaft in the ball milling process, wherein the quantity of addition of the modifier is 20-50% of the weight of the magnetic powder; and (3) carrying out stirring type ball milling reaction of the materials under the condition of 50-80 DEG C for 1.5-4 hours, thereby obtaining the magnetic water treatment agent. The mechanochemical preparation method is the mechanochemical method which is simple in preparation process, low in energy consumption and high in efficiency; and the product prepared has a core-shell structure, and is high in surface activity and excellent in magnetic responsiveness.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a mechanochemical preparation method and equipment for a magnetic water treatment agent. Background technique [0002] At present, the coagulants widely used in water pollution control mainly include aluminum-based coagulants (such as aluminum chloride, aluminum sulfate, polyaluminum chloride, polyaluminum sulfate, etc.) and iron-based coagulants (such as ferric chloride, Ferric sulfate, polyferric chloride, polymerized ferric sulfate, etc.), there are shortcomings such as large dosage of chemicals, slow precipitation rate, large amount of mud production and large amount of suspended solids in the precipitated water. In addition, the biofilm carriers used in the sewage biofilm treatment process include quartz sand, activated carbon, slag, polystyrene balls and polyurethane foam. , it is easier to hang the film, but its strength is poor, it is easy to be damaged ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/28C02F3/34B01F9/08B01F13/06B01F15/02B01J19/18B01F29/64
Inventor 王长智梅荣武韦彦斐
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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