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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

Pending Publication Date: 2021-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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, this system passes ultrafiltration device, nanofiltration device, membrane distillation device, the first evaporative crystallization device and the second evaporative crystallization device Coordinated use fully combines the respective advantages of each device, thereby solving the problem of difficult treatment of catalytic cracking flue gas desulfurization wastewater in petrochemical enterprises, effectively realizing the utilization of water resources and salt resources, and effectively utilizing low-temperature heat sources

Method used

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  • Industrial wastewater treatment system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 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, suspended matter 100 mg / L, COD 80 mg / L, oil content 1 mg / L, Cl - Concentration 30mg / L, SO 4 2- Concentration 6000mg / L, Mg 2+ Concentration 2mg / L, Ca 2+ Concentration 5mg / L, Na + The concentration is 3000mg / L, the dissolved silicon concentration is 5mg / L, and the total nitrogen is 20mg / L.

[0060] In this example, the processing system used was:

[0061] Ultrafiltration device using external pressure hollow fiber membrane module;

[0062] A nanofiltration device using a roll-type nanofiltration membrane module connected to an ultrafiltration device;

[0063] A membrane distillation device (the material of the hollow fiber membrane used in the membrane distillation device is polytetrafluoroethylene) and a four-effect evaporation crystallization device connected with the nanofiltration device re...

Embodiment 2

[0073] In this example, the main water quality characteristics of the treated catalytic cracking flue gas desulfurization wastewater are: pH 8.0, influent conductivity 13000μS / cm, suspended matter 150mg / L, COD 150mg / L, oil content 1.5mg / L , Cl - Concentration 50mg / L, SO 4 2- Concentration 6500mg / L, Mg 2+ Concentration 3mg / L, Ca 2+ Concentration 7mg / L, Na + The concentration is 3500mg / L, the dissolved silicon concentration is 6mg / L, and the total nitrogen is 30mg / L.

[0074] In this embodiment, the processing system used is the same as that in Embodiment 1, except that the material of the hollow fiber membrane used in the membrane distillation device is polypropylene.

[0075] Utilize the above-mentioned treatment system to treat the above-mentioned catalytic cracking flue gas desulfurization wastewater, the treatment steps are:

[0076] The catalytic cracking flue gas desulfurization wastewater enters the ultrafiltration device, and the catalytic cracking flue gas desulf...

Embodiment 3

[0083] In this example, the main water quality characteristics of the treated catalytic cracking flue gas desulfurization wastewater are: pH 8.5, influent conductivity 15000μS / cm, suspended matter 200mg / L, COD 200mg / L, oil content 2.0mg / L , Cl - Concentration 40mg / L, SO 4 2- Concentration 7000mg / L, Mg 2+ Concentration 25mg / L, Ca 2+ Concentration 10mg / L, Na + The concentration is 4000mg / L, the dissolved silicon concentration is 7mg / L, and the total nitrogen is 20mg / L.

[0084] In this embodiment, the processing system used is the same as that in Embodiment 1, except that the material of the hollow fiber membrane used in the membrane distillation device is polyvinylidene fluoride.

[0085] Utilize the above-mentioned treatment system to treat the above-mentioned catalytic cracking flue gas desulfurization wastewater, the treatment steps are:

[0086] The catalytic cracking flue gas desulfurization wastewater enters the ultrafiltration device, and the catalytic cracking flu...

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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 membrane distillation device and a first evaporative crystallization device which are respectively connected with the nanofiltration device; and a second evaporative crystallization device wkhich is connected with the membrane distillation device. Through cooperative use of the ultrafiltration device, the nanofiltration device, the membrane distillation device, the first evaporative crystallization device and the second evaporative crystallization device, the respective advantages of the devices are fully combined, so that the problem that catalytic cracking flue gas desulfurization wastewater of petrochemical enterprises is difficult to treat is solved, resource utilization of water resources and salts is effectively realized, meanwhile, a low-temperature heat source is effectively utilized.

Description

technical field [0001] The present 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 pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D3/04C01D3/14C01D5/00C01D5/16C02F101/10C02F103/18
CPCC01D3/04C01D3/14C01D5/00C01D5/16C02F1/048C02F1/442C02F1/444C02F1/447C02F2101/101C02F2103/18
Inventor 张新妙魏玉梅彭海珠
Owner CHINA PETROLEUM & CHEM CORP
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