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Recycling process for regeneration waste liquid

A technology for regenerating waste liquids and processes. It is used in water/sewage multi-stage treatment, filtration treatment, chemical instruments and methods, etc. It can solve the problems of high enterprise pressure, large waste water production, internal consumption, and high operating costs.

Inactive Publication Date: 2019-10-11
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the following two problems generally exist in the treatment of industrial wastewater: 1. The amount of wastewater produced is greater than the internal consumption, and the excess wastewater has no place to discharge
2. In the case of excessive waste water consumption, enterprises generally adopt evaporation and crystallization process, but the operating cost is very high, and the enterprise is under great pressure

Method used

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  • Recycling process for regeneration waste liquid
  • Recycling process for regeneration waste liquid
  • Recycling process for regeneration waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In a desalinated water preparation workshop, the amount of anode bed regeneration waste liquid is 80m 3 / h.

[0035] Such as figure 1 and figure 2As shown in the figure, the raw water pool ① is pumped to the high-efficiency filter ②, and then enters the desalinated water pool ⑥ after being treated by the positive bed ③, the decarburizer ④ and the negative bed ⑤.

[0036] The regeneration of negative and positive beds uses NaOH solution and HCl solution respectively, and the regeneration of positive bed uses the HCl solution that unit of the present invention reclaims, and consumption is the hydrochloric acid solution 8m of concentration 3%. 3 / h, the amount of waste liquid generated by regeneration of the entire anode bed is 80m 3 / h, the regeneration waste liquid of positive bed enters positive bed regeneration waste liquid pond ⑦, enters the present invention then figure 1 The technological process ⑩. The water production rate of nanofiltration is 75%, the water...

Embodiment 2

[0048] In a softened water preparation workshop, the amount of sodium bed regeneration waste liquid is 18m 3 / h

[0049] Such as figure 1 and image 3 As shown, the raw water pool ① is pumped to the multi-media filter ②, and then enters the soft water pool ④ through the sodium bed ③.

[0050] The softened water preparation workshop uses domestic tap water as the raw water source. After the large particle pollutants are removed by the multimedia filter, it enters the sodium bed for softening, and the softened water is stored in the softening pool ④. The regeneration solution of the sodium bed is 8% NaCl solution, and the system produces 18m 3 The regeneration waste liquid of / h is discharged into the regeneration waste liquid pool ⑤, through the present invention figure 1 The technological process ⑥ treatment, the water production rate of nanofiltration is 70%, and the water production rate of reverse osmosis is 84%. The pressure of the first high-pressure pump is 0.8MPa...

Embodiment 3

[0062] In an industrial wastewater treatment center, the amount of regeneration waste liquid in both positive bed and negative bed is 180m 3 / h

[0063] Such as figure 1 and Figure 4 As shown, the water treatment center has achieved zero discharge of industrial wastewater. After pretreatment, the industrial wastewater enters the deep desalination process, and finally forms two kinds of product water, one is purified water stored in the reservoir ④, and the other is stored in desalted water Desalinated water from pool ⑪, two kinds of water are used for different water points of the factory. Both yin and yang beds generate 180m 3 / h regeneration waste liquid, a total of 360m 3 / h, but the factory can consume a maximum of 245m 3 The industrial waste water of / h, if do not use waste water recycling process of the present invention, there will be 115m 3 / h of regenerated waste water has no place to consume, so it needs to invest in the construction of evaporation and crysta...

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Abstract

The invention relates to a recycling process for regeneration waste liquid. The waste liquid generated by a cation bed or a sodium bed is stored in a regeneration waste liquid pool and conveyed to a self-cleaning filter through a pump and then directly enters an ultrafiltration membrane, produced water of the ultrafiltration membrane enters an ultrafiltration pool, sequentially passes through a booster pump, a first security filter and a first high-pressure pump and then enters an acid-resistant nanofiltration membrane, the acid-resistant nanofiltration membrane separates monovalent and divalent ions in the regeneration waste liquid, divalent and multivalent ions enter a waste liquid pool along with concentrated brine of the acid-resistant nanofiltration membrane and then enter a wastewater treatment unit, monovalent cations directly enter a second security filter along with produced water of the acid-resistant nanofiltration membrane, the produced water is pressurized by a second high-pressure pump and then enters a reverse osmosis membrane for concentration treatment, produced water of the reverse osmosis membrane enters a desalting pool and then enters a recycling pool through the concentrated water side of the reverse osmosis membrane, and water in the recycling pool is used for the regeneration of the cation bed or the sodium bed. By means of the recycling process, the amount of the waste liquid is reduced to a great degree, and a lot of cost is reduced for the the subsequent treatment of the concentrated brine.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a regeneration waste liquid recovery and utilization process. Background technique [0002] With the rapid development of industry, the production of industrial wastewater is increasing day by day, and the pollution of water bodies is becoming more and more extensive and serious, which has seriously threatened human health and safety. Compared with urban sewage, the hazards of industrial wastewater are more serious. Therefore, it is urgent to explore and study advanced treatment processes for industrial wastewater. [0003] In the metallurgical industry, there are two main processes for producing desalted water, one is the membrane method, and the other is the ion exchange method. Both methods produce a large amount of concentrated brine wastewater, and the concentrated brine is not allowed to be discharged directly. [0004] At present, the follo...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/001C02F1/441C02F1/442C02F1/444C02F1/70C02F5/10C02F9/00
Inventor 梁宏书鲁长炜孙跃昆
Owner TANGSHAN IRON & STEEL GROUP
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