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Treatment method for circulating water sewerage and reverse osmosis concentrated water and equipment thereof

A technology for reverse osmosis concentrated water and a treatment method, which is applied to the treatment method and equipment field of circulating water sewage and reverse osmosis concentrated water, and can solve adverse environmental effects, high inorganic salt content, and TDS that do not meet the discharge or reuse standards. and other problems, to achieve the effect of avoiding scaling and vulnerability, long running time, and stable running time

Inactive Publication Date: 2013-02-27
JIANGSU HUAHUI ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this treatment method does not effectively degrade or treat the salt-containing substances in the wastewater. The inorganic salt content in the wastewater is relatively high, and TDS does not meet the discharge or reuse standards. If it is directly discharged, it will cause adverse effects on the environment of the receiving water body.

Method used

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  • Treatment method for circulating water sewerage and reverse osmosis concentrated water and equipment thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment takes the treatment of circulating water sewage and / or reverse osmosis concentrated water of a synthetic ammonia production enterprise as an example.

[0033] The equipment used in this embodiment includes waste water collection tank 1, softening sedimentation tank, sludge thickening tank, filter, nanofilter 5, electrodialysis device 6, concentrated water collection tank 7, evaporation crystallizer 8 and reuse water tank 9 ;

[0034] Described softening sedimentation tank comprises the first-level softening tank 21, the second-level softening tank 22 and the settling tank 23 connected successively; The water inlet of 21 links to each other with waste water collecting tank 1;

[0035] The sludge thickening tank is connected to the settling tank 23 through a sludge pump 32, and the sludge thickening tank 3 is equipped with a press filter 31 for sludge filtration; connected;

[0036] Described filter 4 comprises the multimedia filter 41 that links to eac...

Embodiment 3

[0058] This embodiment takes the treatment of reverse osmosis concentrated water produced by a coal-to-oil company as an example.

[0059] The equipment used in this embodiment is the same as that in Embodiment 1.

[0060] The circulating water sewage and reverse osmosis concentrated water to be treated in this embodiment have a TDS of about 8000mg / L, Ca 2+ About 1200mg / L, Mg 2+ About 860mg / L, COD about 90mg / L, and the treated water volume is 300t / h.

[0061] The method adopted in this embodiment includes the following steps:

[0062] (1) Softening and sedimentation: discharge the circulating water sewage and reverse osmosis concentrated water in the waste water collection tank 1 into the primary softening tank 21 at a flow rate of 300t / h, and pour the 25% lime water in the softening agent box 211 according to The amount of 1100l / h is added in the primary softening pool, and the waste water flows into the secondary softening pool 22 after 40min; the sodium carbonate with a ...

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Abstract

The invention provides a treatment method for circulating water sewerage and reverse osmosis concentrated water and equipment thereof. The treatment method includes: firstly adding a softening medicament into sewerage, filter-pressing the sludge after precipitation, burying the sludge or recycling by resource utilization; filtering and nanofiltering the softened and precipitated sewerage; then electrodialysis treating the nanofiltered sewerage; finally, evaporating and crystallizing the collected nanofiltration concentrated water and the electrodialysis concentrated water, and discharging the crystal substance to landfill, wherein the crystal water and electrodialysis water is used as make-up water for circulating water or as pretreatment water for desalinated water. Accordint to the invention, the double membrane method superposition process of nanofiltration and electrodialysis as well as the steam crystallization technology are empolyed, scaling and wearing of the membrane modules are prevented, regular cleaning is not needed, running time is long and stable, sewerage recovery is improved, the running costs of sewerage treatment is reduced, sewerage recycling is realized, no secondary pollution occurs; and the processing equipment is set reasonably and efficiently, and is stable in running and long-lasting.

Description

technical field [0001] The invention belongs to the technical field of sewage regeneration and utilization in water treatment technology, and in particular relates to a treatment method and equipment for circulating water sewage and reverse osmosis concentrated water. Background technique [0002] In recent years, reverse osmosis technology has been widely used in the sewage treatment process of chemical industry, food, metallurgy and other industries. Reverse osmosis treatment will produce about 30% concentrated water. The reverse osmosis concentrated water has high salinity and hardness. Direct discharge will seriously pollute the environment and cause waste of water resources. [0003] The circulating cooling system is a large industrial water user, accounting for about 70% of the total industrial production water. Since the circulating water is used repeatedly in the water circulation system for a long time, the concentration of dissolved salts and suspended solids in t...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCY02A20/131
Inventor 毛斌丁友清张吉刚王太松王昌敏向新红毛雪明童红柱罗汉东凌华存
Owner JIANGSU HUAHUI ENVIRONMENTAL PROTECTION TECH
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