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Device and technology for processing wastewater generated in fastener surface treatment

A surface treatment and treatment device technology, which is applied in general water supply conservation, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve the problems of non-reusability and low purity of solid salt.

Pending Publication Date: 2019-05-31
YANGZHOU INGREENTREE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-cost technology in the sun evaporation method achieves the purpose of reducing the volume of wastewater by concentrating the salt and organic matter in the saline wastewater, but the final solid salt obtained by this method is not high in purity and cannot be reused

Method used

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  • Device and technology for processing wastewater generated in fastener surface treatment
  • Device and technology for processing wastewater generated in fastener surface treatment
  • Device and technology for processing wastewater generated in fastener surface treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0041] figure 1 It is a process flow diagram of a treatment device for fastener surface treatment wastewater provided in Example 1 of the present invention. see figure 1 , Embodiment 1 of the present invention provides a treatment device for treating wastewater on the surface of fasteners, including: a pretreatment system, a microfiltration system 2, a nanofiltration system 3, a first desalination system, a first evaporation system 5, and a second seawater desalination system. Dilute system, second evaporation system 7 and RO system. The pretreatment system, the microfiltration system 2 and the nanofiltration system 3 are connected in sequence.

[0042] figure 2 yes figure 1 The structural block diagram of the pretreatment system and the microfiltration system 2 of the treatment device for treating wastewater on the surface of fasteners shown. see figure 2 , the pretreatment system includes a wastewater collection tank 11, a pH value adjustment tank 12, a reduction tan...

Embodiment 2

[0061] Embodiment 2 of the present invention provides a process for treating fastener surface treatment wastewater using the treatment device described in Embodiment 1, comprising the following steps:

[0062] S1. The fastener surface treatment wastewater is collected in the wastewater collection pool 11. The wastewater first enters the pH adjustment pool 12 for acid adjustment, then enters the reduction pool 13 for reduction treatment, and then enters the air flotation pool 14 for solid-liquid separation treatment. Finally enter the oil-absorbing cotton system 15 to remove oil stains;

[0063] S2. Start the microfiltration system 2, so that the wastewater treated by S1 enters the microfiltration system 2 for cross-flow filtration to obtain fresh water A, which enters the nanofiltration system 3 and obtains fresh water B and concentrated water B, and fresh water B is obtained from the first fresh water The outlet 32 ​​flows out, and the concentrated water B flows out from the ...

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Abstract

The invention belongs to the technical field of wastewater treatment, and provides a device and technology for processing wastewater generated in a fastener surface treatment. The deice comprises a preprocessing system, a micro filtration system, a nano filtration system, a first seawater desalination system, a second seawater desalination system, and a RO system. The preprocessing system, the micro filtration system, and the nano filtration system are sequentially connected. The nano filtration system comprises a first concentrated water outlet and a first fresh water outlet. The first freshwater outlet is connected to the first seawater desalination system. The first concentrated water outlet is connected to the second seawater desalination system. The outlet of the first seawater desalination system and the outlet of the second seawater desalination system are both connected to the RO system. The RO system comprises a second concentrated water outlet and a second fresh water outlet. The second concentrated water outlet is connected to the inlet of the first seawater desalination system. The second fresh water outlet is connected to a reuse water barrel. The wastewater recoveryrate can reach 95% or more, the water production is stabilized in 20 m<3> / h, and the water quality meets the standards of process water.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment device and a treatment process for treating wastewater on the surface of fasteners. Background technique [0002] The surface treatment of fasteners mainly includes nine processes such as electrogalvanizing, phosphating, oxidation (blackening), electroplating cadmium, electrochrome plating, silver plating, nickel plating, hot-dip galvanizing, galvanizing, and dacromet. Belonging to the extensive form, the main feature of the wastewater is high salinity, which can reach 20000-30000us / cm. [0003] Evaporation process is one of the operation methods of modern chemical units, that is to use heating to vaporize and remove part of the solvent in the solution to increase the concentration of the solution or create conditions for the precipitation of solutes. The low-cost technology in the sun evaporation method achieves the purpose of reducing the v...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/20C02F101/12
CPCC02F1/44Y02A20/131
Inventor 张峰邓家发林敏巫世文杨勇邵阳张寒丁文彬
Owner YANGZHOU INGREENTREE ENVIRONMENTAL TECH CO LTD
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