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Method and apparatus for preparing flocculant

A flocculant and equipment technology, applied in the field of preparing water treatment flocculants, can solve the problems of reducing electrode concentration polarization electrolysis electrode polarization and passivation, difficult process control conditions, long electrochemical reaction time, etc. Conductivity, improve electrolysis efficiency, weaken the effect of polarization phenomenon

Inactive Publication Date: 2005-11-09
WUHAN KINGLION ENVIRONMENTAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This method is a relatively advanced electrolytic method for preparing high-purity and high-efficiency polyaluminum chloride, but its disadvantages are that the process control conditions are strict and difficult to control, the required electrochemical reaction time is long, and the powerful mechanical It is impossible to completely overcome the polarization and passivation of the electrolytic electrode by stirring to reduce the concentration polarization of the electrode and increase the content of chloride ions in the solution to overcome the anode passivation.

Method used

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  • Method and apparatus for preparing flocculant
  • Method and apparatus for preparing flocculant
  • Method and apparatus for preparing flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 , figure 2 As shown, in a plexiglass electrolytic cell with a magnetic field (volume 60×20×150mm) with a volume of 1000ml 3 ) by adding 0.1mol / l AlCl 3 Aqueous solution 500ml, carry out electrolysis under the following conditions:

[0054] Electrode Anode Aluminum plate (aluminum processing corner waste) 15×150×15mm 3 pieces

[0055] Cathode aluminum plate (aluminum processing scrap) 15×150×15mm 3 pieces

[0056] Electrode spacing: 8mm

[0057] Electrolysis power supply: alternating pulse power supply

[0058] Circuit Connection: Parallel

[0059] Alternating pulse current frequency: 1HZ

[0060] Pulse duty time: 0 seconds

[0061] Instantaneous maximum value of pulse voltage: about 9V

[0062] Instantaneous maximum pulse current: 5A

[0063] Additional magnetic field: horizontal inhomogeneous magnetic field

[0064] Magnetic induction at the strongest additional magnetic field: 0.1T

[0065] Electrolyte temperature change: 20~60℃ ...

Embodiment 2

[0069] Such as figure 1 , figure 2 As shown, in a plexiglass electrolytic cell with a magnetic field (volume 60×20×150mm) with a volume of 1000ml 3 ) by adding 0.1mol / l AlCl 3 aqueous solution.

[0070] Electrode Anode Aluminum plate (aluminum processing corner waste) 15×150×15mm 3 pieces

[0071] Cathode aluminum plate (aluminum processing scrap) 15×150×15mm 3 pieces

[0072] Electrode spacing: 8mm

[0073] Electrolysis power supply: alternating pulse power supply

[0074] Circuit Connection: Parallel

[0075] Alternating pulse current frequency: 3Hz

[0076] Pulse duty time: 0 seconds

[0077] Instantaneous maximum value of pulse voltage: around 6V

[0078] Instantaneous maximum pulse current: 6A

[0079] Additional magnetic field:

[0080] Pulse frequency of vertical pulsating magnetic field: 25Hz

[0081] Instantaneous maximum magnetic induction: 0.2T

[0082] Electrolysis time: 90 minutes

[0083] Electrolyte temperature change: 20~60℃

[0084] After...

Embodiment 3

[0086] Such as figure 1 , figure 2 As shown, in a plexiglass electrolytic cell with a magnetic field (volume 60×20×150mm) with a volume of 1000ml 3 ) by adding 0.1mol / l of FeCl 3 aqueous solution.

[0087] Electrode Anode Iron plate (iron processing corner waste) 15×150×15mm 3 pieces

[0088] Cathode iron plate (iron processing scrap) 15×150×15mm 3 pieces

[0089] Electrode spacing: 8mm

[0090] Electrolysis power supply: alternating pulse power supply

[0091] Circuit Connection: Parallel

[0092] Alternating pulse current frequency: 3Hz

[0093] Pulse duty time: 0 seconds

[0094] Instantaneous maximum value of pulse voltage: around 6V

[0095] Instantaneous maximum pulse current: 6A

[0096] Additional magnetic field:

[0097] Pulse frequency of vertical pulsating magnetic field: 25Hz

[0098] Instantaneous maximum magnetic induction: 0.2T

[0099] Electrolysis time: 90 minutes

[0100] Electrolyte temperature change: 20~60℃

[0101] After the electrol...

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Abstract

Flocculant is prepared through electrolytic process. Inside one electrolyser filled with electrolyte, anodes and cathodes are arranged alternately, and under the magnetic induction strength of 0-0.8T, large alternate pulse current is made to flow between the electrodes to prepare flocculant. The electric pulse has frequency regulated in 0-100 Hz and voltage of 0-100 adjustable. The apparatus includes electrolyser, electrode plate, electrolyte circulating pump, electrolyte and characterized permanent magnet or electromagnetic winding around the electrolyser and alternate power source connected to the anode and cathode. The present invention has no polarization and deactivation and thus has high electrolysis efficiency.

Description

technical field [0001] The invention relates to a method and equipment for preparing flocculants for water treatment. Background technique [0002] In water treatment, flocculants are usually used to remove suspended and dispersed colloidal impurities in water. The preparation method of flocculant includes electrolysis method, which uses constant DC low voltage and high current as electrolysis power supply, and uses agitator to form strong mechanical stirring to increase mass transfer solution, thereby reducing concentration polarization, but there are polarization and passivation phenomenon. [0003] The most widely used typical inorganic polymer flocculant is polyaluminum chloride. Polyaluminum chloride is a typical inorganic polymer flocculant, its flocculation performance is 2~3 times that of common flocculant with the same dose, although its flocculation performance is slightly worse than that of polyacrylamide, its price and residual toxicity are also lower Much low...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/463C02F1/52C25B1/26
Inventor 罗亚田杨高利
Owner WUHAN KINGLION ENVIRONMENTAL TECH
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