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Method of treating oil containing waste water using anion cation mixed ion resin

A technology of mixed ion resin, anion and cation, which is applied in the field of environmental technology and chemical separation, and can solve the problems that the filler needs to be improved, the treatment effect needs to be improved, and the energy consumption of the coarse-grained method is low.

Inactive Publication Date: 2005-02-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the centrifugation method and the electrostatic demulsification method do not need to add chemicals, the energy consumption is high, especially the centrifugation method, and the treatment effect is not good enough. The energy consumption of the coarse-grained method is relatively low, and no chemicals are added, but the filler needs to be developed. Improvement, the processing effect needs to be improved

Method used

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  • Method of treating oil containing waste water using anion cation mixed ion resin
  • Method of treating oil containing waste water using anion cation mixed ion resin
  • Method of treating oil containing waste water using anion cation mixed ion resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Influence test of inlet liquid temperature on oil-water separation.

[0016] The oily wastewater first flows through the gate valve through the grease trap and enters the high-pressure pump, and then enters the coarse granulation device through the gate valve. The anion and cation resin columns used in the coarse granulation device are 50cm in height and 3cm in diameter, and the anion resin uses strong alkali Strong styrene-based anion exchange resin 201×7 (717); cationic resin adopts strongly acidic styrene-based cation-exchange resin 001×7, and the ratio of anion and cation resins is 1:1. The content of the feed oil entering the anion and cation resin column is 500mg / L, and the flow rate of the feed liquid is 10L / H, and finally the oil-water separation is completed through the settling tank. The inlet liquid temperatures were 20°C, 40°C, and 60°C, and the stabilization time was 5 hours. The corresponding oil contents in the outlet liquids were 13.71mg / L, 11.05mg / L, an...

Embodiment 2

[0018] Influence test of liquid inlet stabilization time on oil-water separation.

[0019] The oily wastewater first flows through the gate valve through the grease trap and enters the high-pressure pump, and then enters the coarse granulation device through the gate valve. The anion and cation resin columns used in the coarse granulation device are 50cm in height and 3cm in diameter, and the anion resin uses strong alkali Strong styrene-based anion exchange resin 201×7 (717); cationic resin adopts strongly acidic styrene-based cation-exchange resin 001×7, and the ratio of anion and cation resins is 1:1. The content of oil entering the anion-cation resin column is 500mg / L, the flow rate of the liquid is 10L / H, the temperature of the liquid is 10-20°C, and finally the oil-water separation is completed in the settling tank. The running time is 1 hour, 2 hours, 3 hours, 4 hours, and 5 hours respectively, and the corresponding oil content in the effluent is 15.6mg / L, 14.2mg / L, 14....

Embodiment 3

[0022] The technological process and equipment are the same as above, using old anion-cation resins as fillers for wastewater treatment, wherein the ratio of anion-cation resins is 1:1, the water temperature is 20°C, the influent flow rate is 10L / H, and the oil content in the influent water is 500mg / L. The oil content in the effluent was 28.25 mg / L, and the oil removal rate was 94.35%. It can be seen that the effect of using old anion and cation resins is also about 95%, so the waste and old anion and cation resins can be used to treat oily wastewater, and the purpose of treating waste with waste is realized.

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Abstract

A process for treating the oil-contained sewage includes such steps as filter, pumping in coarse grain equipment, and oil-water separation. It features that in said coarse grain equipment, the mixture of cationic resin and anionic resin is used to form anion-cation resin column which can demulsify the emulsified particles and separate oil from water. Its advantages are simple structure and low cost.

Description

Technical field: [0001] The invention relates to a treatment method for oily wastewater, in particular to a method for treating oily wastewater with anion-cation mixed ion resins, which can separate oil from water in industrial oily wastewater without adding any chemicals, and belongs to the technical fields of environmental technology and chemical separation. Background technique: [0002] Oily wastewater mainly comes from the processing, refining, storage and transportation of petroleum and oil products in the petroleum industry; emulsified oil wastewater such as rolling water and cooling lubricants produced in the process of machinery manufacturing; car washing and oil washing tanks in railway locomotive depots in the transportation industry, etc. The oily wastewater discharged; and the wastewater from catering industry, food processing industry, textile industry and other manufacturing industries also contain a large amount of oil. The direct discharge of oily wastewater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/02B01D17/04C02F1/40
Inventor 贾金平侯士兵王亚林胡志鹏
Owner SHANGHAI JIAO TONG UNIV
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