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A kind of composite water purifying agent and its preparation method and application

A technology of water purifier and enhancer, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of easy precipitation and fast precipitation rate

Active Publication Date: 2021-11-30
CHANGZHOU QINGLIU WATER TREATMENT AGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional aluminum salts can no longer meet the requirements of water quality treatment, which also promotes the development and application of composite water purifiers

Method used

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  • A kind of composite water purifying agent and its preparation method and application
  • A kind of composite water purifying agent and its preparation method and application
  • A kind of composite water purifying agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of composite water purifying agent:

[0023] In a 500ml beaker, add 250g of polyaluminum chloride liquid with a solid content of 45%, then add 22.5g of sodium persulfate, and stir at a constant temperature for 2 hours at 50°C under the condition of 500r / min to obtain a slurry, then mix the slurry Transfer to a rotary evaporator, evaporate and concentrate at 70°C, -0.09MPa, stop evaporating when the condensate reaches 150mL, transfer the concentrated slurry to a beaker, and obtain crystals after cooling to room temperature to obtain a composite water purifier. Named M-PAC.

[0024] PAC comes from Henan Gongyi Fuyuan Water Purification Material Factory. The specific indicators of M-PAC obtained from the test are compared with the specific indicators of PAC, as shown in Table 1.

[0025] Table 1M-PAC and specific indicators of PAC

[0026] sample PACs M-PAC Alumina content / % 28 23 Basicity / % 82.5 86.4 pH(10g / L) 4.2...

Embodiment 2

[0031] In a 500ml beaker, add 250g of a water treatment agent polysulfide aluminum chloride liquid with a solid content of 50%, then add 30g of potassium persulfate, stir at a constant temperature for 2 hours at 60°C under the condition of 500r / min, and then transfer the slurry to On a rotary evaporator, evaporate and concentrate at 70°C, -0.085MPa. When the condensate reaches 100mL, stop evaporating, and transfer the concentrated slurry to a beaker. After cooling to room temperature, the crystal obtained is the grafted persulfate group. Agglomerated polysulfide aluminum chloride composite water purifier.

[0032]It is measured that the aluminum oxide content of the composite water purifier of this embodiment is 26%, the basicity is 83%, and the pH (10g / L) is 4.2.

[0033] Carry out infrared spectrum test to present embodiment, and spectrogram shows at 1570cm -1 There are obvious fluctuations in the peak of the S-O group, indicating that the persulfate group has been grafted ...

Embodiment 3

[0035] In a 500ml beaker, add 250g of polyaluminum iron ferric chloride liquid with a solid content of 60%, then add 45g of sodium persulfate, and stir at a constant temperature for 2 hours at 45°C under the condition of 500r / min, then transfer the slurry to On a rotary evaporator, evaporate and concentrate at 70°C and -0.1MPa. When the condensate reaches 150mL, stop evaporating, transfer the concentrated slurry to a beaker, and obtain crystals after cooling to room temperature to obtain grafted persulfate groups. Agglomerated polyaluminium-ferric chloride composite water purifier.

[0036] It is measured that the aluminum oxide content of the composite water purifying agent of this embodiment is 35.2%, the basicity is 80.3%, and the pH (10g / L) is 4.0.

[0037] Carry out infrared spectrum test to present embodiment, spectrogram shows at 1573cm -1 There are obvious fluctuations in the peak of the S-O group, indicating that the persulfate group has been grafted on the polyalumi...

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Abstract

The present invention relates to a kind of composite water purifying agent and its preparation method and application, the present invention grafts the persulfate radical group in the [Al 2 (OH) n ] x‑ Prepare the composite water purifier, the alum flower of the composite water purifier of the present invention is larger than that of the traditional aluminum brine treatment agent during flocculation and precipitation, and it is easier to precipitate than the traditional aluminum brine treatment agent, and the precipitation rate is fast; In addition, when the dosage of the composite water purifying agent of the present invention is 10mg / L, the reaction time is 15-20min, and the bactericidal effect can reach 99.9%.

Description

technical field [0001] The invention relates to the field of waste water or sewage treatment, in particular to a composite water purifying agent, a preparation method thereof and an application thereof in waste water or sewage treatment. Background technique [0002] Inorganic flocculants can be classified into low-molecular-weight systems and high-molecular-weight systems according to different molecular weights. Low-molecular flocculants include aluminum chloride, aluminum sulfate, ferric sulfate, ferric chloride, etc., which are directly put into water treatment facilities by dry or wet method. Hydrolysis polymerization is generally carried out after entering the water treatment facility; its aggregation speed is slow , the formed flocs are small and highly corrosive, and the water purification effect is not ideal in some occasions. Polymer flocculants refer to the hydrolysis-precipitation kinetic intermediate products of aluminum and iron salts, that is, hydroxyl polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 韩晓刚顾玲玲李雪峰顾一飞陆亭伊蒋晓春
Owner CHANGZHOU QINGLIU WATER TREATMENT AGENT
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