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A kind of preparation method of flocculation precipitant for the treatment of regenerated lead wastewater

A wastewater treatment and precipitant technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as single function, affecting sewage treatment effect, complicated operation process, etc. , to achieve the effect of less dosage, overcoming low floc strength and simple formula

Inactive Publication Date: 2016-04-06
四川有色环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when a single water treatment agent is used, it needs to be dissolved and put in multiple times, which makes the operation process too complicated. At the same time, the function of the water treatment process is too single, which will also affect the effect of sewage treatment

Method used

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  • A kind of preparation method of flocculation precipitant for the treatment of regenerated lead wastewater

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specific Embodiment 1

[0020] The configuration of sodium carboxymethyl cellulose solution has the following steps: use neutral water without salts and inclusions, control the water temperature at 40 degrees Celsius, slowly sprinkle sodium carboxymethyl cellulose into the water, and stir at 100~300r / min, the solubility is controlled at 0.1% on a dry basis, and then diluted to 0.05% before use. The dissolving ratio of the prepared sodium carboxymethyl cellulose solution is 1:80. The ratio of sodium carboxymethyl cellulose to sodium silicate is 1:10. The solubility of sodium silicate aqueous solution is 1:50.

[0021] After mixing, the flocculation precipitant, polyacrylamide and sodium carboxymethyl cellulose, is stirred and heated with a constant temperature water bath at a temperature of 20°C; the pH value of the mixture is adjusted with dilute hydrochloric acid or dilute sodium hydroxide solution, and the pH value for 6.

specific Embodiment 2

[0023] The configuration of sodium carboxymethyl cellulose solution has the following steps: use neutral water without salts and inclusions, control the water temperature at 45 degrees Celsius, slowly sprinkle sodium carboxymethyl cellulose into the water, and stir at 100~300r / min, the solubility is controlled at 0.3% on a dry basis, and then diluted to 0.05% before use. The dissolving ratio of the prepared sodium carboxymethyl cellulose solution is 1:100. The ratio of sodium carboxymethyl cellulose to sodium silicate is 1:20.

[0024] After mixing, the flocculation precipitant, polyacrylamide and sodium carboxymethyl cellulose, is stirred and heated with a constant temperature water bath at a temperature of 20°C; the pH value of the mixture is adjusted with dilute hydrochloric acid or dilute sodium hydroxide solution, and the pH value for 7.

[0025] The solubility of sodium silicate aqueous solution is 1:100.

[0026] The main reason for using sodium carboxymethyl cellul...

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Abstract

The invention relates to a flocculation precipitant for the treatment of recycled lead wastewater and a preparation method thereof. Sodium acid solution is a coagulant aid, and the ratio of sodium carboxymethyl cellulose to sodium silicate is 1:10-1:20. The invention has the beneficial effects as follows: (1) The formula is simple, the source of raw materials is wide, the price is low, the operability is strong, and it can be applied industrially. (2) This flocculation precipitant uses carboxymethyl cellulose sodium precipitant on the basis of the traditional flocculant polyacrylamide, and at the same time introduces sodium silicate co-solvent. The mixed flocculation precipitant can play the advantages of each component and improve the precipitation. Efficiency, precipitation efficiency can reach more than 99%.

Description

technical field [0001] The invention relates to a flocculation precipitant for treating recycled lead wastewater and a preparation method thereof. Background technique [0002] Generally speaking, in terms of floc size, compactness, settling velocity and final flocculation effect, inorganic low-molecular and high-molecular-weight flocculants are not as good as inorganic-organic high-molecular composite flocculants, and the dosage of the former is also significantly more than the latter. Anionic organic polymer flocculants cannot provide neutralization for negatively charged colloidal particles, and the effect is poor when used alone as a flocculant. Inorganic flocculants have strong practicability for water treatment of various complex components, and can effectively remove micro-nano particles, but the flocs formed are small and the dosage is large. However, the amount of organic flocculants is small, the flocculation speed is fast, and the influence of coexisting salts, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F1/58
Inventor 蒋加洪薛兴福白娟莉
Owner 四川有色环境科技有限公司
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