Electroplating wastewater recycling process and electroplating wastewater recycling apparatus

A technology of electroplating wastewater and recycling equipment, which is applied in the direction of water/sewage treatment, metallurgical wastewater treatment, neutralization water/sewage treatment, etc. It can solve the problems of electroplating wastewater that cannot be recycled and resource waste, and achieve the reduction of pollutant discharge. Low investment, reliable system effect

Pending Publication Date: 2018-03-23
NINGBO ZHONGJUN SHANGYUAN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems that the electroplating wastewater cannot be recycled and resources are wasted, the present invention proposes an electroplating wastewater recovery process and an electroplating wastewater recovery equipment that treats the electroplating wastewater, recycles it, and saves water resources.

Method used

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  • Electroplating wastewater recycling process and electroplating wastewater recycling apparatus
  • Electroplating wastewater recycling process and electroplating wastewater recycling apparatus
  • Electroplating wastewater recycling process and electroplating wastewater recycling apparatus

Examples

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Embodiment 1

[0030] Embodiment 1 A kind of electroplating wastewater recycling process of the present invention comprises the following steps:

[0031] 1) Preliminarily filter the electroplating wastewater stock solution to be treated to adjust the pH value, collect after removing the particulate suspended impurities in the electroplating wastewater stock solution, and obtain the treatment solution A; wherein the preliminary filtration includes sand filter and carbon filter, sand filter (30CMH): Used to intercept suspended solids, colloids and other particulate impurities in water, thereby removing impurities in water (when the pH value of the drainage is alkaline and without acid adjustment, the interception effect is better), and the equipment is judged according to the water inlet and outlet pressure during operation , when the pressure difference is greater than 1.5KG, manual backwashing is used; carbon filter (30CMH): activated carbon absorbs and removes organic matter, colloids, micro...

Embodiment 2

[0037] Example 2 A kind of electroplating wastewater recovery process equipment constructed according to a kind of electroplating wastewater recovery process in Example 1, including a pretreatment unit 1 for removing suspended particles in electroplating wastewater, for removing metal ions in electroplating wastewater The cationic resin exchange unit 2, the ultrafiltration unit 3 for intercepting macromolecules in the electroplating wastewater, the reverse osmosis unit 4 and the controller for reducing the conductivity of the treated water, the water inlet of the pre-treatment unit is connected with the outside to be treated The electroplating wastewater outlet is connected, the water outlet of the pretreatment unit is connected with the water inlet of the cationic resin exchange unit, and the water outlet of the cationic resin exchange unit is divided into two paths, the first path is discharged according to the electroplating water standard, and the second path is connected to...

Embodiment 3

[0050] Embodiment 3 This embodiment is an appropriate improvement to Embodiment 2: the pretreatment unit 1 electroplating wastewater stock solution collection bucket 11 (with a capacity of 5 m 3 ) downstream of the overflow water tank 111 (capacity is 3m 3 ), the filter equipment 13 is changed into two consecutive bag filters (accuracy is 50 μm, and the treatment flow rate is 30m 3 / h), and a stirrer and a liquid level switch (LT) are established in the electroplating wastewater stoste collection bucket 11, and a liquid level switch (LT) and a pH meter are provided in the overflow water tank; the first delivery pump is a group, and The conveying capacity is 30m 3 / h frequency conversion delivery pump; and the electroplating wastewater stock solution needs to add acid to adjust the pH value to 9.5-11 before entering the electroplating wastewater stock solution collection barrel 11;

[0051] The cation resin capture tower 23 of the cation resin exchange unit is two sets of hea...

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Abstract

Disclosed are an electroplating wastewater recycling process and an electroplating wastewater recycling apparatus. The electroplating wastewater recycling process comprises the steps of primarily filtering electroplating raw wastewater to be treated to remove impurities, and introducing heavy metal chelated resin to remove heavy metal ions; detecting whether the treated wastewater meets the emission standard for electroplating wastewater; if yes, discharging directly; if not, continuing to filter the impurities, and performing ultrafiltration and reverse osmosis to obtain satisfactory purifiedwater. The electroplating wastewater recycling apparatus comprises a pretreatment unit for removing particulate suspended maters in electroplating wastewater, a cationic resin exchange unit for removing metal ions in the electroplating wastewater, an ultrafiltration unit for intercepting macromolecules in the electroplating wastewater, a reverse osmosis unit for decreasing electrical conductivityof the treated wastewater, and a controller. The electroplating wastewater recycling process and the electroplating wastewater recycling apparatus have the advantages that utilization rate of water is continuously increased, water application cost is lowered, and the yield and quality of produced water are stable; the whole system is reliable, stable and highly practical.

Description

technical field [0001] The invention relates to an electroplating wastewater recycling process and electroplating wastewater recycling equipment. Background technique [0002] At present, my country has become a big country in the electroplating industry. In the Pearl River Delta, the Yangtze River Delta and other major coastal cities, there are large and small electroplating factories. In the electroplating industry, the high cost of water has become a recognized problem in the industry. Disadvantages of the current treatment process: the amount of wastewater after front-end treatment is relatively large, about 15m 3 / h, directly discharged through simple sand filter and carbon filter treatment, the wastewater treatment is not complete, on the one hand, the direct discharge of heavy metals in electroplating wastewater will cause pollution, on the other hand, waste of water resources, and cannot be recycled due to technical difficulties and other issues use. Contents of ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/16C02F101/20
CPCC02F9/00C02F2101/20C02F2101/22C02F2103/16C02F1/441C02F1/444C02F1/66C02F1/001C02F1/42
Inventor 郭洪涛万结永唐万军皇甫路远刘洪涛
Owner NINGBO ZHONGJUN SHANGYUAN AUTO PARTS
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