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A process and equipment for removing nickel ions in aluminum profile wastewater

A technology of nickel ions and aluminum profiles, which is applied in the field of technology and equipment for removing nickel ions in aluminum profile wastewater, can solve the problems that the removal effect of nickel ions cannot be fully guaranteed and affects the removal effect of nickel ions, and achieves good nickel removal effect , Stable processing performance and high efficiency

Inactive Publication Date: 2015-12-23
HUZHOU SHANGDE WATER TREATMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, it is found that because the wastewater contains various metal ions such as aluminum, copper, nickel, etc., and because the essential characteristics of each ion are different, when each ion undergoes oxidation-reduction, replacement, flocculation, adsorption, and co-precipitation and filtration, its effect on the solution The pH of the environment and the reaction residence time requirements are different, so the removal effect of nickel ions cannot be fully guaranteed
In addition, in the above-mentioned metal surface treatment process, in order to improve the surface characteristics of the workpiece, various organic or inorganic additives with complexation and solution stabilization effects will be used. These substances exist in the wastewater to be treated, which will cause chemical neutralization reactions. Negative impact, affecting the removal effect of nickel ions

Method used

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  • A process and equipment for removing nickel ions in aluminum profile wastewater
  • A process and equipment for removing nickel ions in aluminum profile wastewater
  • A process and equipment for removing nickel ions in aluminum profile wastewater

Examples

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Embodiment 1

[0046] figure 1 Be the process flow diagram of embodiment 1 of the present invention, as figure 1 Shown, a kind of technology that removes nickel ion in aluminum profile waste water, this technology comprises the steps:

[0047] (1) The waste water in the waste water sump 1 is introduced into the micro-electrolysis reactor 3 through the waste water lifting pump 2, and sulfuric acid a with a concentration of 10% to 20% is added to adjust the pH value of the waste water to 3 to 4, and the residence time is 5 to 6 minute;

[0048] (2) The waste water after the reaction enters the neutralization adjustment reactor 4, adds hydrogen peroxide (H 2 o 2 ) and sodium hydroxide (NaOH) with a concentration of 5%, after stirring and mixing, add sulfuric acid b with a concentration of 20% to 30%, and adjust the pH value of the wastewater to 6 to 9;

[0049] (3) The uniformly mixed waste water enters the inclined tube sedimentation tank 7 through the intermediate water pump I6, and PAM i...

Embodiment 2

[0059] image 3 Be the process flow diagram of embodiment 2 of the present invention, as image 3 Shown, a kind of novel process of nickel-containing waste water treatment, this process comprises the steps:

[0060] (1) The waste water in the waste water sump 1 is introduced into the micro-electrolysis reactor 3 through the waste water lifting pump 2, and sulfuric acid a with a concentration of 10% to 20% is added to adjust the pH value of the waste water to 3 to 4, and the residence time is 5 to 6 minute;

[0061] (2) The waste water after the reaction enters the neutralization adjustment reactor 4, adds hydrogen peroxide (H 2 o 2 ) and sodium hydroxide (NaOH) with a concentration of 5%. After stirring and mixing, the waste water enters the intermediate water tank I5, and the pH value is 10 to 11.5. Adding a concentration of 20% to 30% sulfuric acid b adjusts the pH value of the waste water to 6 to 9 ;

[0062] (3) The uniformly mixed waste water enters the inclined tube...

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Abstract

The invention relates to a process and equipment for removing nickel ions from wastewater of an aluminum profile. The process comprises the steps that wastewater enters a microelectrolysis reactor through a wastewater lifting pump, adding sulfuric acid a, the wastewater after the reaction enters a neutralization and regulation reactor, hydrogen peroxide and sodium hydroxide are added, uniformly stirred and mixed through a stirring device, and enter an inclined tube settling pond through an intermediate water pump I, PAM (polyacrylamide) is added for performing flocculation, sedimentation, and solid-liquid separation; nickel-containing sludge is recovered from a precipitate through a sludge clearing device, and the wastewater is discharged after low-concentration nickel ions in the wastewater are deeply removed through a bag filter and a terminal ion adsorber. According to the process, by using a microelectrolysis agglomeration technology, structures of emulsifying solutions and complexes in the waste are effectively damaged, and low-concentration nickel ions in the wastewater are deeply removed by adopting the terminal ion adsorber; and the process has the advantages of low consumption of chemicals, less nickel-containing waste slag, good nickel removing effect, high efficiency, stable treatment performance, and the like; and the treated wastewater reaches the national emission standard and nickel in the wastewater is completely recovered.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a process and equipment for removing nickel ions in aluminum profile wastewater. Background technique [0002] The production process of aluminum profiles mainly includes degreasing, alkali etching, pickling, oxidation, sealing and coloring of formed aluminum profiles, and the profiles processed by the above processes need to be cleaned with water, and this part of the profile cleaning water is discharged in the form of overflow The cleaning tank is the main source of aluminum profile wastewater. In addition to a large amount of aluminum ions, the production wastewater of aluminum profile factories also contains some metal ions such as zinc, nickel, and copper. Among them, metallic nickel is a hard and corrosion-resistant heavy metal with almost no acute toxicity, and the toxicity of general nickel salts is also low, but nickel compounds can stimulate arginase and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06
Inventor 谈建新
Owner HUZHOU SHANGDE WATER TREATMENT EQUIP