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Chemical nickel waste water treating method

A treatment method and chemical nickel technology are applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, oxidized water/sewage treatment, etc. Simple and space-saving effect

Inactive Publication Date: 2016-08-24
漆雅丽 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are various problems that need to be solved urgently, such as (1) large investment, large land occupation, and large energy consumption; (2) long process flow, difficult operation and management, high labor intensity for workers, and high operating costs; (3) difficult to operate stably Discharge

Method used

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  • Chemical nickel waste water treating method

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Effect test

Embodiment 1

[0018] Chongqing Haoli Electroplating Wastewater Treatment Station was put into operation in 2012, with a treatment capacity of 1,000 tons per day. Since the plastic electroplating contains chemical nickel wastewater, the chemical nickel wastewater is 50 tons / day, and the water quality of the chemical nickel wastewater in this station is: total nickel 80mg / L. The old technology was used at the beginning, the process is complicated and the process is long (1 regulating tank, 4 reaction tanks, and a sedimentation tank), there are many types of chemicals (5 kinds of chemicals), and the cost is high: the cost of treating one ton of chemical nickel wastewater is 20 The cost of water, electricity, labor, facilities and equipment is 10 yuan, and the nickel index of wastewater treatment cannot meet the standard stably. In October 2013, after our company took over the operation and management of the wastewater station, we solved this problem by applying the "TL chemical nickel wastewat...

Embodiment 2

[0022] The invention was applied in March 2014, and gradually expanded to four units including Chongqing Qizhu Electroplating Wastewater Station, Chongqing Hengke Machinery Manufacturing Co., Ltd. (Electroplating Industrial Park), and Chongqing Zhilun Electroplating Co., Ltd. (Electroplating Industrial Park). Treatment of electroplating wastewater up to 3800m 3 As mentioned above, through repeated monitoring and testing by the municipal and district environmental protection departments, there has never been any phenomenon of excessive discharge, and the total nickel and total phosphorus can fully meet the discharge standards in Table 3, which is highly praised.

[0023] Chongqing Zhilun Electroplating Wastewater Treatment Station was put into operation in 2012, with a treatment capacity of 2,000 tons per day. Due to the complex water quality in the electroplating park, there are several chemical nickel plating production lines in the park, and the chemical nickel wastewater is...

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Abstract

The invention provides a chemical nickel waste water treating method. The chemical nickel waste water treating method comprises the following steps: oxidizing a treating agent in a breaking reaction pond; aerating and stirring for reacting for 15-40 minutes; controlling the PH value to be 10-12; entering the reaction pond; adding a coagulant aid; precipitating in a settling pond; collecting supernatant; squeezing sludge in the settling pond; introducing squeezed filtrate into an adjusting pond; performing residue fixing treatment on the squeezed sludge, wherein the treating agent contains 70-90 percent by weight of alkaline matter and 10-30 percent by weight of oxidizing agent; the alkali substrate is one or more of NaOH, Na2CO3 and CaO; the oxidizing agent is H2O2 or / and Na2S2. By adopting the chemical nickel waste water treating method, complete precipitation of nickel ion and phosphorus is realized, the water quantity can reach the discharge standard in table 3 of GB21900_2008 Galvanized Pollutant Discharge Standard, and can stably reach the standard for a long time; the rate of reaching the standard is 99.9 percent or above.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, in particular to the treatment of chemical nickel wastewater. Background technique [0002] At present, almost all electroplating industrial parks have electroless nickel plating. The wastewater generated in electroless nickel plating is called chemical nickel wastewater. The composition of chemical nickel wastewater is relatively complex, including hypophosphite, phosphite, additives and other substances. Among them, wastewater The complexing agent in the complex will combine with nickel ions to form complex small molecules with relatively stable performance, which makes it difficult for nickel ions to form nickel hydroxide precipitation with hydroxide ions, and the total phosphorus content in wastewater is very high, so chemical nickel wastewater treatment It is very difficult, and it is difficult for total nickel and total phosphorus to meet the emission standards in Table 3 of G...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/12
CPCC02F9/00C02F1/52C02F1/56C02F1/66C02F1/72C02F1/722C02F11/121C02F2101/105C02F2101/20C02F2103/16C02F2301/08
Inventor 漆雅丽吴雨时吴平益
Owner 漆雅丽
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