A kind of treatment method of phosphorus/phosphine electroplating wastewater

A technology of electroplating wastewater and treatment methods, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. and other issues, to achieve the effect of reducing sludge production and chemical dosage, reducing treatment costs, and reducing production volume

Active Publication Date: 2016-07-06
石泰山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the emphasis on the removal of heavy metal ions, the removal of phosphorus / phosphonate is often not considered or rarely considered, and there is a possibility that the heavy metal ions in the wastewater meet the standards but the total phosphorus exceeds the standard

Method used

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  • A kind of treatment method of phosphorus/phosphine electroplating wastewater
  • A kind of treatment method of phosphorus/phosphine electroplating wastewater
  • A kind of treatment method of phosphorus/phosphine electroplating wastewater

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1 (see figure 1 )

[0026] Classified collection, acid copper electroplating wastewater and pyrophosphorus electroplating wastewater are combined and collected in the copper-containing wastewater collection pool, and chromium-containing electroplating wastewater, chemical nickel, phosphine-containing electroplating wastewater, and pre-treatment wastewater are collected in their respective collection pools.

[0027] The chromium-containing electroplating wastewater is pumped into the hexavalent chromium reduction reaction pool after the water quality and quantity are adjusted in the chromium-containing electroplating wastewater collection pool. One or more of copper electroplating wastewater, chemical nickel wastewater, phosphine-containing electroplating wastewater, etc.), plus a solution of alkaline substances such as milk of lime or sodium hydroxide or sodium carbonate to adjust the pH value to 6.5-11.5, adding polychlorinated After the aluminum / polyacryla...

Embodiment 2

[0029] Embodiment 2 (see figure 2 )

[0030] Mixed collection, coke copper electroplating wastewater, acid copper electroplating wastewater, chromium-containing electroplating wastewater, phosphine-containing electroplating wastewater, chemical nickel wastewater, and phosphine-containing electroplating wastewater are combined and collected in the chromium-containing wastewater collection pool.

[0031] The mixed electroplating wastewater collected by mixing is pumped into the hexavalent chromium reduction reaction tank (secondary reduction) after the water quality and quantity are adjusted in the chromium-containing wastewater collection tank. After the hexavalent chromium reaches the standard, it enters the neutralization reaction tank, and lime or sodium hydroxide or Alkaline substances such as sodium carbonate adjust the pH value to 6.5-11.5. After adding polyaluminum chloride / polyacrylamide for coagulation / flocculation, the wastewater flows into the sedimentation tank for...

Embodiment 3

[0033] Embodiment 3 (see image 3 )

[0034] Acidic copper electroplating wastewater and chromium-containing electroplating wastewater are collected in the chromium-containing wastewater collection pool, and phosphorus / phosphine-containing wastewater is collected in the phosphorus / phosphorus-containing electroplating wastewater collection pool (such as burnt copper electroplating wastewater, chemical nickel wastewater, phosphorus-containing electroplating wastewater Wait). Phosphorus / phosphine-containing electroplating wastewater is pumped into the oxidation pool, and oxidants such as sodium hypochlorite solution or hydrogen peroxide or ozone are added to react, and the oxidation-reduction potential is controlled to 450mV-750mV. Phosphorus / phosphine-containing electroplating wastewater is discharged into the chromium-containing wastewater collection pool after oxidation pretreatment.

[0035] The wastewater in the chromium-containing wastewater collection tank is pumped into t...

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PUM

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Abstract

The invention discloses a method for treating phosphorus / phosphine-containing electroplating wastewater and relates to electroplating wastewater treatment. The method comprises the following steps: collecting the phosphorus / phosphine-containing electroplating wastewater, chromium-containing electroplating wastewater and acid copper electroplating wastewater in a wastewater collection pool, and performing mud-water separation. The general acid / base in the electroplating wastewater is fully utilized, calcium / magnesium / iron / aluminum and other metal ions needing to be added in the conventional electroplating wastewater treatment can be replaced by heavy metal ions contained in the electroplating wastewater, and total phosphorus in the phosphorus / phosphine-containing electroplating wastewater is removed. The addition amount of metal salt / base in electroplating wastewater treatment can be reduced, the sludge yield and dosage are reduced, the dissolved solids in the wastewater are obviously reduced, the generation amount of electroplating sludge is reduced, the sludge is low in moisture content and is easily subjected to filter pressing, the treatment cost of the electroplating wastewater is reduced, the environmental pollution is reduced, the wastewater recycling rate is improved, the sludge can be reduced by 25-50 percent, and the treatment cost can be reduced by about 25-50 percent.

Description

technical field [0001] The invention relates to electroplating wastewater treatment, in particular to a treatment method for phosphorus / phosphine-containing electroplating wastewater. Background technique [0002] The treatment of electroplating wastewater overemphasizes the removal of heavy metal ions while ignoring the removal of anions, especially coordination anions, in electroplating wastewater, resulting in heavy metals in electroplating wastewater reaching the standard while anions, especially total phosphorus and total nitrogen, exceeding the standard. [0003] The hydroxide precipitation method is a common method for the treatment of electroplating wastewater, and the common treatment processes are mixed treatment process and separation treatment process. The mixed treatment process is to collect cyanide-containing electroplating wastewater and hexavalent chromium-containing electroplating wastewater separately and mix them with other heavy metal-containing electrop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/30C02F103/16
Inventor 石泰山
Owner 石泰山
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