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Method for treatment of waste emulsion

A waste emulsion and treatment method technology, applied in metallurgical wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of high operating cost and increased investment, and achieve low operating cost, small footprint, Obvious operability effect

Inactive Publication Date: 2010-08-04
成都蜀光石油化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disposal of the waste emulsion by two air flotations can separate more slick oil; the waste water is filtered and separated through the ultrafiltration membrane, and the effluent is treated in the next step to reduce the difficulty of subsequent disposal. This process has the following deficiencies: Disposal of waste The membrane of the emulsion needs to be replaced regularly, which makes the operation cost of the equipment relatively high; the ultrafiltration effluent needs to be added with a demulsifier again for demulsification; the standby activated carbon adsorption system also increases the initial investment of the equipment

Method used

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  • Method for treatment of waste emulsion

Examples

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Embodiment 1

[0064] The waste emulsion from a steel pipe processing plant contains a large amount of iron filings, surfactants, and 1.5% oil, and its COD value is 80,000-100,000 mg / L. The method of the present invention and The device treats the waste emulsion, adding demulsifier CaCl 2 and Al 2 (SO 4 ) 3 The dosage is 4kg / m 3 and 5kg / m 3 , the temperature is controlled at 70-80°C, stirred for 2 hours, demulsified and settled for 15 hours, and the treatment capacity is 10 tons. After being treated by the sewage treatment station, the COD value in the effluent quality is 40-100mg / L, and the petroleum content is 1-5mg. / L, fully meet the "National Sewage Comprehensive Discharge Standard" GB8978-1996 Class I standard, the waste oil collected during disposal is regenerated and refined to produce the patented product - protective grease.

Embodiment 2

[0066] The waste emulsion from a mechanical processing factory contains 5% waste oil, surfactant and water, and its COD value is 40000-80000 mg / L. The method and device of the present invention are used to process the waste emulsion Treatment, add demulsifier CaCl 2 and Al 2 (SO 4 ) 3 The dosage is 3kg / m 3 and 4kg / m 3 , the temperature is controlled at 70-80°C, stirred for 2 hours, demulsified and settled for 15 hours, and the treatment capacity is 10 tons. After being treated by the sewage treatment station, the COD value in the effluent quality is 40-100mg / L, and the petroleum content is 1-5mg. / L, fully meet the "National Sewage Comprehensive Discharge Standard" GB8978-1996 Class I standard, the waste oil collected during disposal is regenerated and refined to produce the patented product - protective grease.

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Abstract

The invention discloses a method for the treatment of waste emulsion, more particularly a method for the treatment of waste emulsion generated in the machining processes such as cutting, grinding and the like. The method comprises the following steps: separation of stored emulsion breakers, mechanical air flotation, ion-carbon electrolysis, coagulating sedimentation, oil separation with inclined plate, microorganism purification, sedimentation, sand filtering, etc.; the method has the advantages of simple technology and standard-reaching wastewater, and devices for the implementation of the method have small floor area, little investment, low running cost, low energy consumption, maximal recycling of waste oil resource and prominent operability and is widely suitable for machining and the treatment of waste emulsion in other industries. The waste oil recycled according to the method is completely capable of being used for the production of patented product, the protective grease, thus idealized application of resources is achieved.

Description

Technical field [0001] The present invention involves a method of processing a waste emulsion, especially the treatment method of waste emulsification liquid generated during cutting, grinding and other processing processes, which belongs to the field of waste liquid treatment technology. Background technique [0002] my country is a country with a shortage of water resources and has been listed as one of the 13 poor water countries. At the same time, my country's waters have always faced the pressure of water pollution, of which industrial wastewater is an important source of pollution in the water area.The emulsification solution is mainly composed of 2 to 10%of mineral oil and anion or non -ionic emulsifier, additives (chlorine, sulfur, phosphorus, etc.) and water.After rolling, pulling, rectus, polishing, flatness, cutting, etc.As the head of industrial wastewater, the source distribution of waste emulsification is also very wide. It is mainly produced in the mechanical proce...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/34C02F1/461C02F1/52C02F103/16
Inventor 赵晓东夏位松陈文锦
Owner 成都蜀光石油化学有限公司
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