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Green environment-friendly flocculant and method for preparing same

A green and environmentally friendly flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor flocculation effect and achieve the effects of fast settling speed, low cost and wide source of raw materials

Inactive Publication Date: 2012-08-15
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few flocculants suitable for solid-liquid separation treatment of waste drilling fluid, and the flocculation effect is poor. Therefore, it is urgent to develop a flocculant suitable for solid-liquid separation treatment of waste drilling fluid

Method used

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  • Green environment-friendly flocculant and method for preparing same
  • Green environment-friendly flocculant and method for preparing same
  • Green environment-friendly flocculant and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 1 g of water glass (nano silica) into a 100 mL beaker, add 50 mL of water, slowly adjust the pH to 3 with 0.1 mol / L hydrochloric acid, stir for 1 h to form a water glass solution (nano silica colloid), continue stirring or ultrasonically set aside. Take 50mL of the above-prepared water glass solution in a three-necked flask, and place it in a constant temperature water bath, add 2g St, 1g CMC, stir to dissolve, add 0.003g potassium persulfate when the temperature of the water bath reaches 70°C, and react in a constant temperature water bath for 5h, That is, the SSCMC flocculant solution is obtained.

[0042]Weigh 100g of waste drilling fluid, add 0.5g of the above-prepared SSCMC solution, stir evenly and let it stand, centrifuge at a speed of 4000r / min for 10min in a centrifuge, pour out the upper layer liquid, and measure it at 650nm with an ultraviolet spectrophotometer. The light transmittance (T, %) of the clear liquid, and the mass of the solid filter cake in...

Embodiment 2

[0050] Weigh 5 g of water glass into a 100 mL flask, add 50 mL of water, slowly adjust the pH to 7 with 0.1 mol / L hydrochloric acid, stir for 2 hours to form a water glass solution, continue to stir or sonicate for later use. Take 50mL of the above-prepared water glass solution in a three-necked flask, and place it in a constant temperature water bath, add 7.5g St, 5g CMC, stir and dissolve, add 0.125g potassium persulfate and sodium sulfite (persulfate The mass ratio of potassium to sodium sulfite is 1:1), react in a constant temperature water bath for 4 hours, and obtain the SSCMC flocculant solution.

[0051] The determination of solid phase moisture content, solid phase removal rate, and supernatant liquid permeability is the same as in Example 1. Add 0.1 g of the above-mentioned SSCMC flocculant solution to 100 g of waste drilling fluid for treatment, and the flocculant has a positive effect on the two waste drilling fluids. The flocculation effect is as follows: the mois...

Embodiment 3

[0053] Weigh 0.5 g of water glass into a 100 mL flask, add 50 mL of water, slowly adjust the pH to 5 with 0.1 mol / L hydrochloric acid, stir for 1 hour to form a water glass solution, continue stirring or sonicate for later use. Take 50mL of the above-prepared water glass solution in a three-necked flask, and place it in a constant temperature water bath, add 0.5g St, 0.75g CMC, stir and dissolve, when the temperature of the water bath reaches 90°C, add 0.0065g potassium persulfate, and react in a constant temperature water bath After 5 hours, the SSCMC flocculant solution was obtained.

[0054] The determination of solid phase water content, solid phase removal rate and supernatant liquid permeability is the same as in Example 1. Add 1 g of the above-mentioned SSCMC flocculant solution to 100 g of waste drilling fluid for treatment. The flocculation effect is as follows: the moisture content of the solid phase is 31.52%, the removal rate of the solid phase is 81.56%, and the l...

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Abstract

The invention relates to a green environment-friendly flocculant and a method for preparing the same, wherein the green environment-friendly flocculant is applied to the solid-liquid separation treatment of a waste drilling fluid. The green environment-friendly flocculant comprises the following components: water glass, starch, sodium carboxymethylcellulose, a cross-linking agent and water. The method for preparing the flocculant comprises the following steps of: (1) preparing water glass solution and adjusting the pH of the solution to a range of 3-7 for later use; and (2) adding the starch and sodium carboxymethylcellulose to the water glass solution, stirring the mixture so that the mixture is evenly dissolved, adding the cross-linking agent to the mixture and reacting at 60-90 DEG C for 2-5 h. In case of the same dosage, the solid phase moisture content of the waste drilling fluid treated by the flocculant provided by the invention is lowest, while the solid phase removal ratio and supernatant light transmittance are highest; and the flocculating water separation capability of the flocculant is superior to that of the common inorganic flocculant and the common organic high-molecular flocculant. The flocculant prepared by the method provided by the invention has the advantages of wide raw material source, low cost, low dosage, good flocculantion effect, high adsorption capability, large formed floc, high sedimentation velocity, easiness in separation, greenness and environmental friendliness, innocuity, biodegradability and the like.

Description

technical field [0001] The invention relates to a green and environment-friendly flocculant and a preparation method thereof, in particular to a green and environment-friendly flocculant (SSCMC) used for solid-liquid separation treatment of waste drilling fluid and a preparation method thereof. The flocculant of the present invention is a green and environment-friendly natural polymer composite flocculant, more specifically a simple, low-cost, non-toxic, wide-sourced, green and environmentally friendly high-efficiency flocculant, which is mainly used in the treatment of waste drilling fluid technology field. Background technique [0002] Flocculation-sedimentation is one of the most commonly used operating units in the wastewater treatment process, and the quality of the flocculant is a key factor affecting its treatment effect and treatment cost. The application of flocculants involves domestic sewage, papermaking waste liquid, textile printing and dyeing wastewater, treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 朱红邹静王芳辉
Owner BEIJING UNIV OF CHEM TECH
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