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Industrial wastewater treatment system and application thereof

A technology for industrial wastewater and treatment system, which is applied in gaseous effluent wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., and can solve the problems of difficult treatment of catalytic cracking flue gas desulfurization wastewater

Inactive Publication Date: 2020-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a kind of industrial waste water treatment system, the application of this system in the field of industrial waste water treatment and the method utilizing this system to process industrial waste water, through ultrafiltration device, nanofiltration device , reverse osmosis unit, the first evaporative crystallization unit and the second evaporative crystallization unit are used together, fully combining the respective advantages of each unit, thus solving the problem of difficult treatment of catalytic cracking flue gas desulfurization wastewater in petrochemical enterprises, and effectively realizing water resources and salt resource utilization, while also effectively utilizing low-temperature heat sources

Method used

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  • Industrial wastewater treatment system and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] In this example, the main water quality characteristics of the treated catalytic cracking flue gas desulfurization wastewater are: pH 7.5, influent conductivity 10000 μS / cm, COD 25 mg / L, total nitrogen 20 mg / L, and suspended solids 100 mg / L , oil content 1mg / L, Cl - Concentration 20mg / L, SO 4 2- Concentration 6000mg / L, Mg 2+ Concentration 2mg / L, Ca 2+ Concentration 5mg / L, Na + Concentration 3000mg / L, dissolved silicon concentration 5mg / L.

[0049] In this example, the processing system used was:

[0050] Ultrafiltration device using external pressure hollow fiber membrane module;

[0051] A nanofiltration device using a roll-type nanofiltration membrane module connected to an ultrafiltration device;

[0052] The reverse osmosis device and the four-effect evaporation crystallization device of the coiled reverse osmosis membrane module respectively connected with the nanofiltration device; and

[0053] MVR evaporative crystallizer connected with reverse osmosis de...

Embodiment 2

[0062] In this example, the main water quality characteristics of the treated catalytic cracking flue gas desulfurization wastewater are: pH 8.0, influent conductivity 13000 μS / cm, COD 35 mg / L, total nitrogen 30 mg / L, and suspended solids 150 mg / L , oil content 1.5mg / L, Cl - Concentration 30mg / L, SO 4 2- Concentration 6500mg / L, Mg 2+ Concentration 3mg / L, Ca 2+ Concentration 7mg / L, Na + Concentration 3500mg / L, dissolved silicon concentration 6mg / L.

[0063] In this example, the processing system used is the same as that in Example 1.

[0064] Utilize the above-mentioned treatment system to treat the above-mentioned catalytic cracking flue gas desulfurization wastewater, the treatment steps are:

[0065] The catalytic cracking flue gas desulfurization wastewater enters the ultrafiltration device, and the catalytic cracking flue gas desulfurization wastewater is subjected to ultrafiltration treatment under a pressure of 0.1 MPa, thereby removing solid suspended matter and m...

Embodiment 3

[0072] In this example, the main water quality characteristics of the treated catalytic cracking flue gas desulfurization wastewater are: pH 8.5, influent conductivity 15000 μS / cm, COD 45 mg / L, total nitrogen 20 mg / L, and suspended solids 200 mg / L , oil content 2.0mg / L, Cl - Concentration 50mg / L, SO 4 2- Concentration 7000mg / L, Mg 2+ Concentration 5mg / L, Ca 2+ Concentration 10mg / L, Na + Concentration 4000mg / L, dissolved silicon concentration 7mg / L.

[0073] In this example, the processing system used is the same as that in Example 1.

[0074] Utilize the above-mentioned treatment system to treat the above-mentioned catalytic cracking flue gas desulfurization wastewater, the treatment steps are:

[0075]The catalytic cracking flue gas desulfurization wastewater enters the ultrafiltration device, and the catalytic cracking flue gas desulfurization wastewater is subjected to ultrafiltration treatment under a pressure of 0.12 MPa, thereby removing solid suspended matter and ...

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Abstract

The invention provides an industrial wastewater treatment system. The industrial wastewater treatment system comprises an ultrafiltration device; a nanofiltration device which is connected with the ultrafiltration device; a reverse osmosis device and a first evaporative crystallization device which are respectively connected with the nanofiltration device; and a second evaporative crystallizationdevice which is connected with the reverse osmosis device. The ultrafiltration device, the nanofiltration device, the reverse osmosis device, the first evaporative crystallization device and the second evaporative crystallization device are matched for use, and the respective advantages of each device are fully combined so that the problem that the catalytic cracking flue gas desulfurization wastewater of petrochemical enterprises is difficult to treat is solved, the resource utilization of water resources and salts is effectively realized, and meanwhile, a low-temperature heat source is alsoeffectively utilized.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to an industrial wastewater treatment system and its application. Background technique [0002] As the consumption of fossil fuels continues to increase in modern society, SO X and NO X Air pollutants such as dust and dust are also produced in large quantities, and if these substances are discharged into the atmosphere in large quantities, serious air pollution will be caused. State and local governments on SO X and NO X And particulate matter emission standards are becoming increasingly stringent and sewage charges are increasing. At the same time, the petrochemical industry pollutant discharge standard (GB31571-2015) requires SO 2 less than 100mg / m 3 , NO X less than 150mg / m 3 , particulate matter below 20mg / m 3 . Under such circumstances, in order to meet the strict environmental protection requirements and the company's own development needs, at present, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/18
CPCC02F9/00C02F1/444C02F1/442C02F1/441C02F1/048C02F2103/18
Inventor 张新妙焦旭阳栾金义彭海珠
Owner CHINA PETROLEUM & CHEM CORP
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