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A kind of compound decolorization coagulant, preparation method and decolorization method thereof

A technology of coagulant and dicyandiamide, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve poor phosphorus removal and decolorization effects and complicated production process , inconvenient use and other problems, to achieve the effect of shortening the dephosphorization and decolorization time, simple production process and convenient operation

Active Publication Date: 2020-10-27
上海丰远环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a composite decolorizing coagulant, which solves the problems in the prior art of poor dephosphorization and decolorization effects, inconvenient use, secondary pollution, complex production process and high comprehensive cost

Method used

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  • A kind of compound decolorization coagulant, preparation method and decolorization method thereof
  • A kind of compound decolorization coagulant, preparation method and decolorization method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of composite decolorizing coagulant is made of ferrous sulfate, dicyandiamide, NaClO 3 , urea, ammonium sulfate, magnesium chloride, formazan (B, C, B) aldehyde and deionized water according to their mass ratio of 1:0.02~3.0:0.02~1.5:0.002~0.8:0.2~4.5:0.02~0.5:0.2 ~4.0: 0.2~2.5, produced by polymerization reaction using the following preparation method, which specifically includes the following steps:

[0032] Step 1: Under normal temperature and pressure, weigh each component according to the above mass ratio, dissolve ferrous sulfate in deionized water, and slowly add NaClO under stirring 3 Solid, exothermic reaction, then slowly add dicyandiamide, urea, ammonium sulfate and magnesium chloride, the solution gradually rises;

[0033]Step 2: When the temperature of the reaction solution obtained in Step 1 reaches about 50°C, slowly add formaldehyde (B, C, B) aldehyde, and control the addition rate of formaldehyde to 500ml / min, and the reaction continues to exoth...

Embodiment 2

[0037] The operating conditions are the same as in Example 1, except that the mass ratio of the components of the composite decolorizing coagulant is 1:0.5~1.5:0.5~1.0:0.1~0.5:1.5~2.5:0.1~0.2:1.5~ 2.5:0.5~1.5, use high-chroma printing and dyeing wastewater and the composite decolorization coagulant according to the mass ratio (printing and dyeing wastewater / decolorization coagulant) to be 1:0.5, stir evenly at room temperature, let stand for 20 minutes, that is The decolorization rate of printing and dyeing wastewater can reach 99.99%.

Embodiment 3

[0039] The operating conditions are the same as in Example 1, except that the mass ratio of the components of the composite decolorizing coagulant is 1:1.5:0.5:0.0125:0.25:0.125:2.5:1.25. The mass ratio of the composite decolorizing coagulant (printing and dyeing wastewater / decolorizing coagulant) is 1:0.003. Stir evenly at room temperature and let stand for 50 minutes to make the decolorization rate of printing and dyeing wastewater reach 95.92%.

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Abstract

The invention belongs to the field of waste water disposal, and discloses a novel composite decolorizing coagulant, a preparation method and a decolorizing method thereof. The novel composite decolorizing coagulant is prepared from ferrous sulfate, cyanoguanidine, NaClO3, urea, ammonium sulfate, magnesium chloride, (methyl, acet, propyl, n-butyl) aldehyde, and de-ionized water through polymerization reaction at proportion; the mass ratio is 1: 0.02-3.0: 0.02-1.5: 0.002-0.8: 0.2-4.5: 0.02-0.5: 0.4-4.0: 0.2-2.5; the novel composite decolorizing coagulant is prepared by adding cyanoguanidine, NaClO3, urea, ammonium sulfate, magnesium chloride, (methyl, acet, propyl, n-butyl) aldehyde during the polymerization of ferrous sulfate and NaClO3, rising temperature to about 70 DEG C and aging the components. The preparation method of the novel composite decolorizing coagulant is simple in operation and convenient to use; the novel composite decolorizing coagulant cannot cause secondary pollution to environment, is good in decolorizing effect, low in production cost, and wide in using scale.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a decolorizing agent, in particular to a composite decolorizing coagulant, a preparation method and a decolorizing method thereof. Background technique [0002] my country's water resources account for about 1 / 4 of the world's per capita level. With the rapid development of my country in the past ten years, the demand for industrial water and domestic water is increasing, and more and more wastewater and sewage are produced. Due to industrial wastewater Stolen drainage is serious, especially electroplating dyeing wastewater, food dye wastewater and soy sauce wastewater. Due to the large amount of sodium ions, it is difficult for general decolorizers to remove the chroma in wastewater. There are still many places where domestic sewage has not been effectively treated. The direct discharge has exacerbated the serious pollution of the water ecological environment. For e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F101/30
CPCC02F1/52C02F2101/308
Inventor 刘崇荣刘辉刘晔刘静康爱蓉
Owner 上海丰远环保科技有限公司