Circulating water zero drainage separate recycling treating device and treating method thereof

A treatment device and a technology of quality separation and reuse, which are applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Increased consumption and other issues, to achieve the effect of reducing treatment costs, zero discharge, and reducing the amount of supplementary water

Active Publication Date: 2018-05-29
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Fouling and slime deposits cause the heat transfer efficiency of the heat exchanger to decrease, and the energy consumption increases. In severe cases, it will be forced to stop production and damage the equipment
[0004] At present, most of the circulating water and sewage reuse treatment systems that h

Method used

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  • Circulating water zero drainage separate recycling treating device and treating method thereof

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Embodiment 1

[0029] same figure 1 It is a structural schematic diagram of an embodiment of the present invention applied in a circulating water system.

[0030] The device of the recycling water zero efflux treatment method according to the present invention comprises a circulating water sump 1, a mixing device 2, a filter aid dosing system 15, a filtering device 3, a sewage pool 13, and a filter press 14. Nanofiltration device 4, nanofiltration filtrate collection tank 5, nanofiltration retentate collection tank 6, electrodialysis devices 7, 10, electrodialysis concentrated water collection tanks 8, 11, evaporation crystallizer 12, electrochemical treatment device 9 .

[0031] The filter aid dosing system 15 includes a chemical tank, a diaphragm metering pump, and a pipeline mixer. The filter aid and the sewage from the circulating water sump 1 enter the mixing device 2 after passing through the manifold of the pipeline mixer.

[0032] The filter device 3 is a secondary filter device, i...

Embodiment 2

[0044] The quality-based recycling treatment of circulating water with zero effluent is the same as that in Example 1. An enterprise's circulating cooling open circuit system, the conductance of circulating water and sewage is 1860μS / cm, Cl - About 320mg / L, total hardness 350mg / L, turbidity 13NTU, treated water volume 100m 3 / h.

[0045] The method adopted in this embodiment includes the following steps:

[0046] (1) Filter aid pretreatment: Discharge 100m of circulating water in the circulating water collection tank 1 3 / h and the filter aid 0.02mg / L polyaluminum chloride and 0.01mg / L polyacrylamide drawn from the filter aid dosing device 15 are added to the mixing device 2 through the pipeline mixer, and passed through the filter device 3 successively through the multi-media Filter to remove impurities with a particle size of 10 μm or more in the sewage. Through a precision filter, remove impurities with a particle size of 5 μm or more to reduce suspended solids and turbid...

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Abstract

The invention relates to a circulating water zero drainage separate recycling treating device and a treating method thereof. The circulating water zero drainage separate recycling treating device comprises a circulating water collecting pool, a mixing device, a filter aid agent adding system, a filter unit, a sewage pool, a filter press, a nanofiltration device, a nanofiltration filtrate collecting tank, a nanofiltrationtrapped fluid collecting tank, an electrodialysis device, an electrodialysisconcentrated water collecting tank, an evaporative crystallization device and an electrochemical treating device. The treating method comprises the steps of firstly, adopting the technologies of chemical filter aid, precipitation, filter and the like to conduct turbid lowering and suspension removing pretreatment, then adopting a nanofiltration separate purification treatment technology to achieve salt separation treatment, concentrating and evaporating obtained filtrate to obtain sodium chloride solid, after conducting electrodialysis treatment on nanofiltered trapped fluid, producing recycled circulating water, and after conducting electrochemical rigidity lowering and sterilizing on strong brine, producing recycled water. The salt content of the circulating water can be effectively lowered, the problems of scaling and corrosion brought by too high ionic concentration of a circulatingwater system are solved, and meanwhile, efficient salt separation treatment and resource recycling are achieved.

Description

technical field [0001] The invention belongs to the technical field of circulating water treatment, and in particular relates to a treatment device and a treatment method thereof for zero-outflow, quality-separation and reuse of circulating water. Background technique [0002] The circulating water system is one of the indispensable energy media for the production of metallurgical, energy and chemical enterprises, and it is the device with the largest water consumption in industrial enterprises. At present, the supplementary water of circulating cooling water generally accounts for about 70% of the fresh water used in industry, and its water consumption is large and stable. Circulating water sewage is high-calcium, high-alkali, and high-salt wastewater, and it is an effective way for enterprises to save energy, reduce emissions, and reduce fresh water consumption. [0003] In the open circulating cooling water system, the circulating water is concentrated through the contin...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCC02F1/001C02F1/048C02F1/442C02F1/4693C02F1/50C02F1/5236C02F1/56C02F5/00C02F9/00
Inventor 滕厚开陶蕾朱安民王惠秦立娟王宁姚光源
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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