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Method of treating saline industrial wastewater

A treatment method and technology for industrial sewage, applied in water/sewage treatment, degassed water/sewage treatment, reduced water/sewage treatment, etc., can solve the problem of sewage treatment not up to standard, achieve thorough backwashing, high desalination rate, Technically reliable results

Inactive Publication Date: 2018-03-16
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for treating salty industrial sewage to solve the problem that the existing industrial sewage physical treatment method does not meet the standard of sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for treating salty industrial sewage, comprising the following steps:

[0028] (1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;

[0029] (2) Ultrafiltration treatment: the sewage after the pretreatment of step (1) is first sent into a self-cleaning filter with a filtration precision of 50 μm and a built-in stainless steel filter screen, and then sent into an external pressure ultrafiltration system. The ultrafiltration membrane is made of polycarbonate hollow fiber, adopts dead-end filtration method, and the effluent is then passed through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;

[0030] (3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a two-stage two-stage reverse osmosis system, the reverse...

Embodiment 2

[0033] A method for treating salty industrial sewage, comprising the following steps:

[0034] (1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;

[0035] (2) Ultrafiltration treatment: the sewage pretreated in step (1) is first sent to a self-cleaning filter with a filtration accuracy of 50 μm and a built-in copper filter screen, and then sent to an external pressure ultrafiltration system. The ultrafiltration membrane adopts hollow fiber made of polyvinyl chloride, adopts dead-end filtration method, and the effluent passes through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;

[0036] (3) Reverse osmosis treatment: send the sewage after step (2) ultrafiltration into a first-stage two-stage reverse osmosis system, the reverse osmosis system adopts PROC10 ...

Embodiment 3

[0039] A method for treating salty industrial sewage, comprising the following steps:

[0040] (1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;

[0041] (2) ultrafiltration treatment: the sewage after the pretreatment of step (1) is first sent into a self-cleaning filter with a filtration precision of 50 μm and a stainless steel filter screen inside, and then sent into an external pressure ultrafiltration system. The ultrafiltration membrane is made of hollow fiber made of polyvinylidene fluoride, and adopts the dead-end filtration method, and the effluent is then passed through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;

[0042] (3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a two-stage two-stage reverse osmosis...

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Abstract

The invention relates to a method of treating saline industrial wastewater, comprising the steps of (1) pretreating, to be specific, delivering wastewater into a filter tank to remove suspended matters; (2) ultrafiltering, to be specific, delivering the wastewater of step (1) into an external pressure ultrafiltration system to perform ultrafiltering; (3) performing reverse osmosis, to be specific,delivering the wastewater of step (2) to a reverse osmosis system, and removing salt; (4), performing stripping, to be specific, delivering the produced water of reverse osmosis of step (3) into a stripping column, performing stripping, and adjusting pH to meet reuse needs. The method has the advantages that a multistage quartz sand filter tank can be used to effectively remove suspended matterswith blockage rarely occurring; the external pressure ultrafiltration system used herein has good applicability and is available for full-flow filtration; ultrafiltration membranes are of hollow fiber, having good strength, backflushing is more thorough, and the membranes can restore their performance well; BW30XFR-400 / 34i or PROC10 reverse osmosis membrane components can provide high salt removalrate, reaching 98% and above, and the comprehensive recovery rate of wastewater is high, reaching 85% and above.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating salty industrial sewage. Background technique [0002] In people's minds, water is inexhaustible, but with the continuous advancement of industrialization and urbanization, people's demand for water resources has greatly exceeded the storage capacity of water resources. After entering the new century, many Local water resources are depleted or seriously polluted. The discharge of sewage seriously pollutes the environment, especially the pollution of industrial sewage has gradually attracted people's attention. Sewage treatment and reuse has become the only way to save water resources and reduce environmental pollution. [0003] According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/12
CPCC02F1/001C02F1/20C02F1/441C02F1/444C02F1/50C02F1/70C02F5/08C02F9/00C02F2101/12
Inventor 苑丹丹吴红军李志达隋欣邵丽英王宝辉
Owner NORTHEAST GASOLINEEUM UNIV
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