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Acid pickling and phosphating production wastewater integrated treatment device and treatment process thereof

A technology for treating device and production wastewater, which is applied in the fields of metallurgical wastewater treatment, special compound water treatment, biological water/sewage treatment, etc. The operation and operation and maintenance are convenient, the operation effect is good, and the effect of the treatment effect is good.

Pending Publication Date: 2020-05-15
SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for wastewater with more complex components, such as surfactants and fluorides, high phosphate and nitrate content, and metal ion zinc, iron, nickel and other pollutants, its removal ability is limited. , in actual engineering applications, if many process settings are constructed by civil engineering, not only the cost is high, but also there are problems of inconvenient operation and maintenance
[0006] At present, there is a lack of an integrated device for the treatment of pickling and phosphating production wastewater with high treatment efficiency and its treatment process

Method used

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  • Acid pickling and phosphating production wastewater integrated treatment device and treatment process thereof
  • Acid pickling and phosphating production wastewater integrated treatment device and treatment process thereof
  • Acid pickling and phosphating production wastewater integrated treatment device and treatment process thereof

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Embodiment 1

[0040] Such as figure 1 with figure 2 As shown, an integrated treatment device for pickling and phosphating production wastewater of the present invention includes a grid 1, a regulating tank 2, an integrated treatment device for Fenton oxidation 3, an integrated treatment device for neutralization and coagulation 4, and an integrated treatment device for hydrolysis and denitrification 5. A / O biochemical integrated processing device 6, the grid 1, regulating tank 2, Fenton oxidation integrated processing device 3, neutralization coagulation integrated processing device 4, hydrolysis denitrification integrated processing device 5, A / O The biochemical integrated treatment devices 6 are connected sequentially, the water inlet pump 7 is arranged between the regulating tank 2 and the Fenton oxidation integrated treatment device 3, the first sedimentation tank 10 is connected with the neutralization tank 14, and the The second sedimentation tank 18 is connected with the hydrolysis...

Embodiment 2

[0052] The difference between embodiment 2 and embodiment 1 is:

[0053] A treatment process of an integrated treatment device for pickling and phosphating production wastewater treatment according to the present invention comprises the following steps:

[0054] In step (1), the Fenton oxidation reagent is H 2 o 2 , FeSO4.

[0055] In step (2), after the wastewater enters the neutralization and coagulation treatment device, it is first 2 SO 4 Or HCl to properly adjust the pH of the incoming water to around 8.

[0056] In step (3), the average sludge concentration in the hydrolysis reaction tank can be increased by 2g / L.

[0057] In step (4), the dissolved oxygen in the anoxic tank 26 is controlled below 0.5 mg / L, and the sludge return ratio is controlled between 50-200%.

Embodiment 3

[0059] The difference between embodiment 3 and embodiment 1 is:

[0060] A treatment process of an integrated treatment device for pickling and phosphating production wastewater treatment according to the present invention comprises the following steps:

[0061] In step (1), the Fenton oxidation reagent is NaOH, Ca(OH) 2 , PAM.

[0062] In step (2), after the wastewater enters the neutralization and coagulation integrated treatment device, phosphate and SS are removed by adding PAC and PAM;

[0063] In step (3), the dissolved oxygen in the hydrolysis reaction tank is controlled below 0.5 mg / L.

[0064] In step (4), the dissolved oxygen in the aerobic pool 27 is controlled between 2-4 mg / L, and the reflux ratio of the nitrification solution is controlled between 200%-400%.

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Abstract

The invention discloses an acid pickling and phosphating production wastewater treatment device which comprises a grid, an adjusting tank, a Fenton oxidation integrated treatment device, a neutralization and coagulation integrated treatment device, a hydrolysis and denitrification integrated treatment device and an A / O biochemical integrated treatment device, wherein the grid, the adjusting tank,the Fenton oxidation integrated treatment device, the neutralization and coagulation integrated treatment device, the hydrolysis and denitrification integrated treatment device and the A / O biochemicalintegrated treatment device are connected in sequence. The acid pickling and phosphating production wastewater treatment device has the advantages of strong impact load resistance, high treatment efficiency, low investment cost and low operating cost.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to an integrated device and a treatment process for pickling and phosphating production waste water treatment. Background technique [0002] Phosphating treatment is a chemical reprocessing process on the surface of metal materials and their parts. Phosphating-treated metal materials and their products form an immersible phosphate film on the surface, which has good bonding ability, wear resistance and adhesion to paint with the metal substrate, so it is used in machinery, steel and other industries. Phosphating treatment technology is used to make the protective layer of mechanical parts. The phosphating treatment process generally includes several steps such as alkaline washing and degreasing, hot water rinsing, cold water rinsing, pickling and rust removal, secondary cold water rinsing and phosphating. [0003] Phosphating production wastewater mainly contains pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/121C02F101/14C02F101/16C02F101/20C02F103/16
CPCC02F9/00C02F11/121C02F2103/16C02F1/725C02F1/722C02F2305/026C02F1/5236C02F1/56C02F1/66C02F2001/007C02F3/28C02F3/34C02F3/30C02F3/302C02F2101/163C02F2101/14C02F2101/20C02F2101/203
Inventor 王文标朱成辉魏朋
Owner SHANGHAI HONESS ENVIRONMENTAL TECH CORP
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