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Polymer coagulant

A coagulant and polymer technology, which is applied in the field of water treatment reagents, can solve the problems of not being suitable for long-term storage, can only be used at any time, and high operating costs, achieving remarkable effects, convenient dosage, and reducing operating costs.

Inactive Publication Date: 2010-05-05
上海复泽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the method of using polyacrylamide for sewage treatment generally has the following deficiencies: 1. When polyacrylamide is dissolved, it is easy to solidify into agglomerates, and it will be stirred violently for a long time, which will reduce its performance; 2. The dissolved polyacrylamide solution, It is not suitable for long-term storage. The more dilute the solution, the easier it is to degrade. It can only be used as it is prepared or used up on the same day at the latest. The operating cost is high and may cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In parts by weight, in a reaction kettle at 30°C, dissolve 25 parts of anionic polyacrylamide into 40 parts of water under stirring, and gradually add 15 parts of dispersant sodium bicarbonate, stir evenly, and then, under stirring, Add 5 parts of non-ionic polyacrylamide and 5 parts of cationic polyacrylamide. After completely dissolving, use 10% hydrochloric acid aqueous solution to adjust the pH value to 6.5-7.5, stir evenly, and gradually cool to room temperature to obtain colorless or slightly It turns into a yellow transparent solution, and adding 2-5ppm of the transparent solution to the sewage can significantly improve the sedimentation effect, and the chemical oxygen demand (COD) and chromaticity index of the treated sewage are also significantly improved. The test data are shown in Table 1 below.

[0024] Table 1: Water treatment effect data of the polymer coagulant obtained in Example 1:

[0025]

[0026]

[0027] The polymer coagulant liquid did not a...

Embodiment 2

[0029] In parts by weight, in a reaction kettle at 50°C, dissolve 5 parts of anionic polyacrylamide into 45 parts of water under stirring, and gradually add 10 parts of dispersant sodium carbonate, stir evenly, and then, under stirring, Add 5 parts of non-ionic polyacrylamide and 25 parts of cationic polyacrylamide. After completely dissolving, use 10% hydrochloric acid aqueous solution to adjust the pH value to 6.5-7.5, stir evenly, and gradually cool to room temperature to obtain colorless or slightly It turns into a yellow transparent solution, and adding 2-5ppm of the transparent solution to the sewage can significantly improve the sedimentation effect, and the chemical oxygen demand (COD) and chromaticity index of the treated sewage are also significantly improved. The test data is shown in Table 2 below.

[0030] Table 2: The water treatment effect data of the polymer coagulant obtained in Example 2:

[0031]

[0032] The polymer coagulant liquid did not appear cloud...

Embodiment 3

[0034] In parts by weight, in a reaction kettle at 65°C, dissolve 5 parts of anionic polyacrylamide into 50 parts of water under stirring, and gradually add 8 parts of dispersant sodium sulfate, stir evenly, and then, under stirring, Add 25 parts of nonionic polyacrylamide and 5 parts of cationic polyacrylamide. After completely dissolving, use 10% hydrochloric acid and 5% ammonia solution to adjust the pH value to 6.5-7.5, stir evenly, and gradually cool to room temperature to obtain Colorless or slightly yellow transparent solution, adding 2-5ppm of this transparent solution to the sewage can significantly improve the sedimentation effect, and the COD (Chemical Oxygen Demand) and chromaticity index of the treated sewage are also significantly improved . The test data are shown in Table 3 below.

[0035] Table 3: The water treatment effect data of the polymer coagulant obtained in Example 3:

[0036]

[0037] The polymer coagulant liquid did not appear cloudy, coagulated...

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Abstract

The invention relates to a polymer coagulant which contains the following components by weight percent: 5%-25% of anionic polyacrylamide, 5%-25% of cationic polyacrylamide, 5%-25% of non-ionic polyacrylamide, 3%-15% of dispersant and 40%-60% of water. The polymer coagulant is in solution state, and the range of pH value is 6.5-7.5; and the polyacrylamide is a water-soluble substance with a net structure. The polymer coagulant provided by the invention can be used in sewage treatment with larger change range of pH value and has high treatment efficiency and significant effects, and the clarity of water after the treatment is high; the polymer coagulant is in the solution state, has stable performances and can be configured to be the solution with very low concentration, the solution can not be degraded, the dosing quantity is convenient to control, when in use, the long-term dispersion and the stirring are unnecessary, the polymer coagulant can be used anytime and anywhere, and the operation is safe and convenient; and the polymer coagulant can be preserved for a long time, and the production cost can be reduced.

Description

technical field [0001] The invention relates to a water treatment reagent, in particular to a polymer coagulant, which is applied to various sewage treatment processes. Background technique [0002] Among the many methods of wastewater treatment, the water purification method based on chemical reagents has the advantages of less investment in equipment, less land occupation, end-of-process, fast sludge settlement, and relatively low operating costs. At present, it is more common to use polyacrylamide as a flocculant for sewage treatment. Polyacrylamide (Polyacrylamide) is abbreviated as PAM, which is polymerized from acrylamide monomer and is a water-soluble linear polymer substance. The chemical properties of monomer acrylamide are very active, and a series of chemical reactions can be carried out at the double bond and amide group. By using different processes and introducing different functional groups, products with different charges can be obtained: anion, cation, noni...

Claims

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Application Information

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IPC IPC(8): C02F1/56
Inventor 张华
Owner 上海复泽环境科技有限公司
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