Waste emulsion quantitative reduction processing technology and apparatus

A waste emulsion and treatment process technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It is obvious that it is difficult to automate operation, etc., to achieve the effect of obvious reduction effect, easy automatic control, and convenient automatic control.

Inactive Publication Date: 2015-10-28
上海幽岫环保科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese invention patent CN201410225131 discloses an emulsion treatment system, which realizes the demulsification reaction by adjusting the pH value. After the oil separation treatment, sodium hydroxide is added to the fast mixing tank, and the pH is adjusted to neutral before entering the subsequent treatment system. However, This patent has not yet considered the fluidity of the emulsion when the temperature is low in winter
However, the existing acid demulsification process for emulsion wastewater treatment still has difficulties in flexibly treating emulsion wastewater with diverse properties and types so as to achieve a better demulsification effect, and the reduction effect (i.e. skimming to a greater extent Oil and less entrainment of water) not obvious
[0011] In summary, the current treatment of emulsion wastewater has problems such as high treatment cost, inconspicuous reduction, and difficulty in automatic operation. It is urgent to propose an economical, feasible, and high-efficiency waste emulsion reduction process and device.

Method used

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  • Waste emulsion quantitative reduction processing technology and apparatus

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Experimental program
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Effect test

Embodiment 1

[0036] The waste emulsion enters the waste emulsion reduction device container 11 through the waste emulsion lifting pump 5, and the switch of the lifting pump 5 is controlled by the program set in the liquid level float controller and the electric control cabinet 18, thereby controlling the flow of the waste emulsion. Measure the amount of waste emulsion water inflow through the water inlet electromagnetic flowmeter 10, and turn on the stainless steel stirring device 12 at the same time. Sulfuric acid is added, and the sulfuric acid metering pump 7 is programmed according to the program in the electrical control cabinet 18 and the pH and temperature compound electrodes 14 to control the dosage of sulfuric acid. After the addition of sulfuric acid, the stainless steel agitator 13 is turned on, and an appropriate stirring program is set in the electrical control cabinet 18 according to the characteristics of the emulsion. With oil skimmer 15 for oil skimming treatment, the proc...

Embodiment 2

[0039] A Taiwan-funded electrical treatment company produces 1m3 / d of waste emulsion, and the treatment cost is 3800 yuan / m3. After adopting the device of the present invention, the dosage of sulfuric acid is between 0.8% and 1.5%, the diameter of the steel strip oil skimmer is 25 mm, the volume after oil skimming is reduced to less than 90% of the original volume, and the operation time of the steel strip oil skimmer is 12 hours. The operating cost is 100 yuan / m3, which saves the owner 3320 yuan / day in operating costs and provides great economic value for the owner. The test results show that the influent COD concentration is 160,000mg / L, the oil concentration is 100,000mg / L, the effluent COD concentration is less than 20,000mg / L, and the oil removal rate is higher than 98%. Add 5000mg / L of ferrous sulfate and 15000mg / L of hydrogen peroxide to the effluent (using the Fenton oxidation system formed by ferrous ions and hydrogen peroxide to minimize the organic matter in the was...

Embodiment 3

[0041] A German Transmission Machinery Co., Ltd. produces 3m3 / d of waste emulsion. After adopting this device, the volume ratio of sulfuric acid is 1.2%, the operation time of steel belt oil skimmer is 16h, and the COD concentration of waste emulsion is 100000mg / L. After treatment, the COD of the effluent is less than 10000mg / L. Dosing hydrogen peroxide 15000mg / L and ferrous sulfate 5000mg / L in the effluent, the COD concentration after treatment is less than 8500mg / L, and the supernatant is mixed with domestic sewage and cleaning wastewater for treatment. After treatment, the COD is less than 60mg / L to achieve wastewater reuse Require.

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Abstract

The invention relates to a waste emulsion quantitative reduction processing technology and apparatus, and is suitable for processing waste emulsion produced in the fields of elevator industry, automobile manufacturing industry, high precision and high-end equipment manufacturing industry, etc. The processing technology comprises the following steps: adding the waste emulsion into a quantitative reduction apparatus, adding acids for demulsification, controlling the amount of the acids according to an abrupt change point of pH change values, skimming upper level floating oil by an oil skimmer, and discharging the lower waste liquid after neutralizing. After processing, the COD removal rate reaches to 85% or higher, and the oil substance removal rate reaches to 92%-98%, and the volume reduction amount of the waste emulsion is higher than 85%. The overall technology can be in automatic control conveniently, is used for realizing quantitative reduction processing, and thetechnology and apparatus have high processing efficiency andareeconomically feasible.

Description

technical field [0001] The invention belongs to the field of high-concentration and refractory wastewater treatment, and in particular relates to a waste emulsion treatment process and device. Background technique [0002] The lathes used in the production process of the machining industry are generally cooled, lubricated, cleaned, and rust-proofed with emulsion, which can prolong the service life of the lathe. [0003] The production and disposal of waste emulsion has become an important factor affecting the mechanical processing industry. According to the regulations in HW07 and HW08 in the National Hazardous Waste List, emulsions are hazardous wastes and need to be treated in accordance with hazardous waste management regulations, which will greatly Increases handling and disposal costs for emulsion generating units. [0004] Taking Shanghai as an example, the approved emulsion treatment capacity of enterprises with emulsion treatment qualifications in Shanghai only acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 潘志刚刘星王龙王海峰
Owner 上海幽岫环保科技有限公司
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