Oil-containing emulsion wastewater treatment method and apparatus thereof

A waste water treatment and emulsion technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, flotation water/sewage treatment, etc., can solve the problems of complicated operation and various treatment equipment, and achieve convenient operation and increased filtration and degreasing effect, the effect of excellent water quality

Active Publication Date: 2013-05-01
大连格兰清水环境工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a treatment method for oil-containing emulsion wastewater and an emulsion wastewater integration device specially designed and used for this method. The present invention has excellent demulsification effect and high oil-water separation efficiency. The integrated device can handle multiple processes such as demulsification, air flotation, flocculation, etc., effectively solving the problems of numerous processing equipment and complicated operation

Method used

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  • Oil-containing emulsion wastewater treatment method and apparatus thereof
  • Oil-containing emulsion wastewater treatment method and apparatus thereof

Examples

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Embodiment 1

[0024] Example 1: Oily emulsion wastewater from a bearing factory, the water quality COD is 70000-80000mg / L, the oil content is 6000-8000mg / L, using the treatment method of the present invention and the emulsion wastewater integrated treatment device, after pretreatment, Composite demulsification, air flotation, flocculation, and filtration are five steps to complete the treatment process. The ion demulsifier is calcium chloride, and the oxidative demulsifier is ozone. After demulsification, the pH is adjusted to 8, and then flocculation is carried out. The flocculants are PAFC and PAM. , ventilated and stirred for 2 hours, and finally the effluent water quality COD≤100mg / L, oil content≤10mg / L.

Embodiment 2

[0025] Example 2: The oil-containing emulsion wastewater of a mechanical processing plant, the water quality COD is 80000-100000mg / L, and the oil content is 8000-10000mg / L, using the treatment method of the present invention and the emulsion wastewater integrated treatment device, after pretreatment , Composite demulsification, air flotation, flocculation, and filtration five steps to complete the treatment process, in which calcium chloride and aluminum chloride are used as ionic demulsifiers, sodium hypochlorite as oxidative demulsifiers, pH is adjusted to 9, flocculants are PAC and PAM, ventilation Stir for 3 hours, and finally the effluent quality COD≤100mg / L, oil content≤10mg / L.

Embodiment 3

[0026] Example 3: In a waste water recovery center, the water quality COD is 40000-60000 mg / L, and the oil content is 3000-5000 mg / L. Using the treatment method of the present invention and the integrated treatment device for emulsion waste water, pretreatment and composite demulsification , air flotation, flocculation, and filtration five steps to complete the treatment process, in which calcium chloride is used as ionic demulsifier, potassium permanganate is used as oxidized demulsifier, pH is adjusted to 8, flocculant is PAC and PAM, ventilated and stirred for 1 hour, and finally Effluent water quality COD≤100mg / L, oil content≤10mg / L.

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Abstract

The present invention relates to the field of wastewater treatments, particularly to a treatment apparatus for oil-containing emulsion wastewater generated by cutting, burnishing and other steps during a mechanical processing process and a method thereof. According to the treatment method, a composite demulsification method is mainly adopted so as to carry out complete demulsification; and then air flotation, flocculation and filtration are performed, wherein a filler is added with filtration mediums such as rice hull and sawdust on the basis of traditional quartz sand active carbon so as to increase a filtration and oil removing effect, such that effluent water quality is excellent. In addition, with the integrated treatment apparatus designed according to the method, the whole processes such as pretreatment, demulsification, air flotation, flocculation and the like can be independently completed, and advantages of economy, energy saving, complete function, small occupation area and easy operation are provided.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a method and device suitable for treating oil-containing emulsion waste water produced in processes such as cutting and grinding during mechanical processing. Background technique [0002] The emulsion in industrial wastewater is a kind of water pollution source that is difficult to deal with. It is mainly produced by the mechanical processing industry, such as cutting, grinding and other processing processes. The oily substance in the wastewater emulsion floats on the water to form an oil film, preventing the oxygen in the air from dissolving in the water, causing aquatic organisms to die due to lack of oxygen, causing the water body to deteriorate and pollute the environment. [0003] At present, the methods for demulsification treatment of oil-containing emulsion wastewater include heating, ionization, chemical, physical and other methods, among which chemical or ionizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/24
Inventor 张成巍宋俊洲
Owner 大连格兰清水环境工程有限公司
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