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Method for preparing water quality stabilizer of circulatory cooling water by utilizing zinc-containing wastewater and application of method

A technology of water quality stabilizer and circulating cooling water, which is applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. It can solve the problem of small amount of treatment by physical and chemical methods, long treatment process, human and animal impact, etc. problems, to achieve resource utilization, easy industrial application, simple and feasible operation

Active Publication Date: 2018-11-06
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the more systematic treatment methods include physical method and chemical precipitation method, but they have some disadvantages in the treatment of zinc-containing wastewater: the physical and chemical method has a small treatment capacity and relatively complicated operation, and is only suitable for treating zinc-containing wastewater with a simple composition.
The chemical precipitation method needs to add a large amount of precipitant, and a large amount of waste residue is produced after filtration. The treatment process is long and generally produces a large amount of secondary pollution; Seepage will pollute the surface and groundwater system and cause serious environmental pollution, which will have adverse effects on humans and animals

Method used

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  • Method for preparing water quality stabilizer of circulatory cooling water by utilizing zinc-containing wastewater and application of method
  • Method for preparing water quality stabilizer of circulatory cooling water by utilizing zinc-containing wastewater and application of method
  • Method for preparing water quality stabilizer of circulatory cooling water by utilizing zinc-containing wastewater and application of method

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Effect test

Embodiment 1

[0031] The method for preparing circulating cooling water water quality stabilizer 1 by utilizing zinc-containing waste water comprises the following steps:

[0032] 1) 2L of zinc-containing wastewater generated during the production process of the cold-rolling electro-galvanizing unit is passed into the grease trap, and the gravity separation method is used to stay for 10 minutes to remove suspended oil with a particle size greater than 15 μm;

[0033] 2) The above-mentioned zinc-containing wastewater after degreasing is discharged into the regulating tank, and the hydraulic retention time of the regulating pond is 8min for preliminary settlement and separation;

[0034] 3) Pass the wastewater discharged from the above regulating tank through the biological contact oxidation filter, slowly add 30mL of 30% H in the pool 2 o 2 , the hydraulic retention time in the pool is 30min, and the pH value is 3 to 5, and Fe in the wastewater 2+ Oxidation reaction occurs through interact...

Embodiment 2

[0040] The method for preparing circulating cooling water water quality stabilizer 2 by utilizing zinc-containing waste water comprises the following steps:

[0041]1) 4L of zinc-containing wastewater generated during the production process of the cold-rolling electro-galvanizing unit is passed into the grease trap, and the gravity separation method is used to stay for 10 minutes to remove suspended oil with a particle size greater than 15 μm;

[0042] 2) The above-mentioned zinc-containing wastewater after degreasing is discharged into the regulating tank, and the hydraulic retention time of the regulating pond is 8min for preliminary settlement and separation;

[0043] 3) Pass the waste water discharged from the above-mentioned regulating tank through the biological contact oxidation filter, and slowly add 60 mL of H2O with a mass fraction of 30% in the pool 2 o 2 , the hydraulic retention time in the pool is 30min, and the pH value is 3 to 5, and Fe in the wastewater 2+ O...

Embodiment 3

[0049] The method that utilizes zinc-containing waste water to prepare circulating cooling water water quality stabilizer 3 may further comprise the steps:

[0050] 1) 5L of zinc-containing waste water generated during the production process of the cold-rolling electrogalvanizing unit is passed into the grease trap, and the gravity separation method is used to stay for 10 minutes to remove suspended oil with a particle size greater than 15 μm;

[0051] 2) The above-mentioned zinc-containing wastewater after degreasing is discharged into the regulating tank, and the hydraulic retention time of the regulating pond is 8min for preliminary settlement and separation;

[0052] 3) Pass the waste water discharged from the above regulating tank through the biological contact oxidation filter, and slowly add 80mL of 30% H in the pool. 2 o 2 , the hydraulic retention time in the pool is 30min, and the pH value is 3 to 5, and Fe in the wastewater 2+ Oxidation reaction occurs through int...

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Abstract

The invention further provides a method for preparing a water quality stabilizer of circulatory cooling water by utilizing zinc-containing wastewater and application of the method. The method comprises the following steps of firstly removing suspension oil with grain sizes greater than 15 mu m in the zinc-containing wastewater, then performing settling separation, afterwards, removing various organic matter, adjusting a pH value to enable iron in a dissolved state in the wastewater to precipitate, and then adding a flocculating agent to precipitate and filtrate to obtain filter liquor; addingthe organic matter and inorganic matter into the filter liquor to prepare the water quality stabilizer; adding the water quality stabilizer into industrial circulatory cooling water to perform scale inhibition, wherein when the dosage of the water quality stabilizer is 15-30 mg / L, the scale inhibiting ratio can be up to 88% or more. Compared with simple chemical precipitation, the method can utilize generated sludge well, and secondary pollution can not be caused to the environment. The method is a conventional method for wastewater treatment, the operation is simple and practicable, the operation cost is controllable, and the industrial application is easy.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for preparing a water quality stabilizer for circulating cooling water by utilizing zinc-containing wastewater and an application thereof. Background technique [0002] Among the metals used by contemporary humans, zinc is the fourth most used heavy metal after iron, aluminum, and copper. Zinc resources are widely used in smelting, food, and pharmaceutical industries. In recent years, with the rapid economic development, the production and consumption of zinc have also increased rapidly. Waste from mining, pigment, smelting, electroplating, metal processing, chemical industry and other industries has become the main source of zinc heavy metal pollution in the environment. The total amount of zinc-containing wastewater is smaller than that of papermaking, printing and dyeing, chemical industry, pesticides, etc., and the pollution area is narrow. However, due to its wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/10C02F9/14
CPCC02F1/40C02F1/5245C02F1/56C02F1/66C02F3/00C02F5/08C02F5/105C02F9/00
Inventor 刘璞张垒刘海英刘尚超王丽娜舒纯俞琴吴高明
Owner 武汉钢铁有限公司
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