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Coal biological flocculation coagulant aid and application method thereof

A technology of biological flocculation and application method, applied in the field of coagulation aids, can solve the problems of aggravating pipeline pressure, increasing rheology, increasing circulating water concentration, etc.

Inactive Publication Date: 2016-07-20
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] CaCl is often used in the original flocculation process of slime water treatment in coal preparation plants 2 As a coagulant, CaCl 2 The long-term and large-scale use will cause the concentration of circulating water to increase, which will increase its rheology, thereby increasing flow resistance and increasing pipeline pressure.
Moreover, too high CaCl 2 The concentration will also inhibit the flocculation and sedimentation effect to a certain extent

Method used

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  • Coal biological flocculation coagulant aid and application method thereof
  • Coal biological flocculation coagulant aid and application method thereof
  • Coal biological flocculation coagulant aid and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] 1) Take 100mL of well-stirred coal slime water, then add 0.03mmol KMnO 4 and 0.045 mmol Na 2 SO 3 , stirred with a magnetic slow-speed stirrer for 30s; the control group also took 100mL of uniformly stirred slime water, and added 0.03mmol of CaCl 2 , Stir with a slow magnetic stirrer for 30 s.

[0020] 2) Use a pen-type pH meter to adjust the pH to 7 respectively, add 1ml corynebacterium glutamicum flocculant to both groups, then stir rapidly for 5 minutes, and let stand for 30 minutes.

[0021] 3) Aspirate the supernatant, and measure the absorbance values ​​of the two groups of supernatants at 660nm with a UV-5100 ultraviolet spectrophotometer to obtain the active state MnO 2 The group flocculation rate is 78.421%, CaCl 2 The group flocculation rate is 62.544%.

example 2

[0023] 1) Take 100mL of well-stirred coal slime water, then add 0.04mmol KMnO 4 and 0.06mmolNa 2 SO 3 , stirred with a magnetic slow-speed stirrer for 30s; the control group also took 100mL of uniformly stirred slime water, and added 0.04mmol of CaCl 2 , Stir with a slow magnetic stirrer for 30 s.

[0024] 2) Use a pen-type pH meter to adjust the pH to 7 respectively, add 1ml corynebacterium glutamicum flocculant to both groups, then stir rapidly for 5 minutes, and let stand for 30 minutes.

[0025] 3) Aspirate the supernatant, and measure the absorbance values ​​of the two groups of supernatants at 660nm with a UV-5100 ultraviolet spectrophotometer to obtain the active state MnO 2 The group flocculation rate is 82.544%, CaCl 2 The group flocculation rate is 64.554%.

example 3

[0027] 1) Take 100mL of well-stirred coal slime water, then add 0.05mmol KMnO 4 and 0.075 mmol Na 2 SO 3 , stirred with a magnetic slow-speed stirrer for 30s; the control group also took 100mL of uniformly stirred slime water, and added 0.05mmol of CaCl 2 , Stir with a slow magnetic stirrer for 30 s.

[0028] 2) Use a pen-type pH meter to adjust the pH to 7 respectively, add 1ml corynebacterium glutamicum flocculant to both groups, then stir rapidly for 5 minutes, and let stand for 30 minutes.

[0029] 3) Aspirate the supernatant, and measure the absorbance values ​​of the two groups of supernatants at 660nm with a UV-5100 ultraviolet spectrophotometer to obtain the active state MnO 2 The group flocculation rate is 83.112%, CaCl 2 The group flocculation rate is 68.888%.

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Abstract

The invention relates to a coal biological flocculation coagulant aid. The coal biological flocculation coagulant aid has the beneficial effects that a flocculation effect can be effectively improved, and an adsorption bridging effect of microbial flocculant is better facilitated. The actual addition amount of the coagulant aid is low, compared with a traditional coagulant aid calcium chloride, the effect is better, it is avoided that because the coagulant aid circularly accumulates in coal slime, the water hardness is aggravated, the rheology behavior of the coal slime cannot be reduced, and the pipeline pressure cannot be increased. The coagulant aid comprises an active-state coagulant aid manganese dioxide generated when sodium sulfite and potassium permanganate are added online, the addition amount of the coagulant aid is calculated according to the chemical reaction equation, and the coagulant aid is made to totally react in the flocculation process of the coal slime. The PH value range which the coagulant aid adapts to conforms to the actual coal slime PH range, and the coagulant aid can well adapt to microorganism flocculation of the coal slime.

Description

technical field [0001] The invention relates to a coagulant aid and its application, in particular to a coagulant aid for coal bioflocculation and its application method. Background technique [0002] CaCl is often used in the original flocculation process of slime water treatment in coal preparation plants 2 As a coagulant, CaCl 2 The long-term and large-scale use of water will increase the concentration of circulating water and increase its rheology, thereby increasing flow resistance and increasing pipeline pressure. Moreover, too high CaCl 2 The concentration will also inhibit the flocculation and sedimentation effect to a certain extent. And active state coagulant aid MnO of the present invention 2 , the rich hydrogen bonds on the surface of the metal oxide have a strong chemical adsorption effect on coal slime particles, which can promote the mutual adsorption between particles, which is beneficial to the adsorption and bridging effect of biological flocculants. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D3/06
CPCB03D3/06
Inventor 张东晨范晓露闫佳陈占常飞冀敏敏戴雯
Owner ANHUI UNIV OF SCI & TECH
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