High-concentration emulsion wastewater treatment technology and device

A wastewater treatment and emulsification technology, applied in water/sewage treatment, flotation water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high maintenance cost, low durability, etc. Equipment requirements are simple and easy to control the effect of automation

A wastewater treatment and emulsification technology, applied in water/sewage treatment, flotation water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high maintenance cost, low durability, etc. Equipment requirements are simple and easy to control the effect of automation

CN108328787AInactive Publication Date: 2018-07-27光山白鲨针布有限公司
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  • High-concentration emulsion wastewater treatment technology and device
  • High-concentration emulsion wastewater treatment technology and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] like figure 1 As shown, a high concentration emulsion wastewater treatment process, high concentration refers to the emulsion wastewater whose COD value exceeds 100000mg / L, including the following steps:

[0024] Step 1), the waste emulsion is collected, and the air is continuously injected, and the air is provided by an air compressor;

[0025] Step 2), adjust the pH value, pump the waste emulsion into the reaction tank, add lye, the lye is NaOH solution with a mass fraction of 15%, start the stirring device, and adjust the pH of the waste emulsion to 6~9;

[0026] Step 3), demulsification and flocculation, after the pH of the waste emulsion is adjusted, add a demulsification flocculant to the waste emulsion, set the stirring device to stir for 5 minutes and then stop stirring, the temperature of the waste emulsion is maintained at 30~45°C, The waste emulsion enters the separation tank; the demulsifier and flocculant are NaCl and Al respectively 2 (SO 4 ) 3 , the m...

Embodiment 2

[0033] like figure 1 As shown, a high concentration emulsion wastewater treatment process, high concentration refers to the emulsion wastewater whose COD value exceeds 100000mg / L, including the following steps:

[0034] Step 1), the waste emulsion is collected, and the air is continuously injected, and the air is provided by an air compressor;

[0035] Step 2), adjust the pH value, pump the waste emulsion into the reaction tank, add lye, the lye is NaOH solution with a mass fraction of 15%, start the stirring device, and adjust the pH of the waste emulsion to 6~9;

[0036] Step 3), demulsification and flocculation, after the pH of the waste emulsion is adjusted, add a demulsification flocculant to the waste emulsion, set the stirring device to stir for 5 minutes and then stop stirring, the temperature of the waste emulsion is maintained at 30~45°C, The waste emulsion enters the separation tank; the demulsifier and flocculant are NaCl and Al respectively 2 (SO 4 ) 3 , the m...

Embodiment 3

[0043] like figure 1 As shown, a high concentration emulsion wastewater treatment process, high concentration refers to the emulsion wastewater whose COD value exceeds 100000mg / L, including the following steps:

[0044] Step 1), the waste emulsion is collected, and the air is continuously injected, and the air is provided by an air compressor;

[0045]Step 2), adjust the pH value, pump the waste emulsion into the reaction tank, add lye, the lye is NaOH solution with a mass fraction of 15%, start the stirring device, and adjust the pH of the waste emulsion to 6~9;

[0046] Step 3), demulsification and flocculation, after the pH of the waste emulsion is adjusted, add a demulsification flocculant to the waste emulsion, set the stirring device to stir for 10 minutes and then stop stirring, the temperature of the waste emulsion is maintained at 30~45°C, The waste emulsion enters the separation tank; the demulsifier and flocculant are NaCl and Al respectively 2 (SO 4 ) 3 , the m...

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Abstract

The invention relates to the field of harmless treatment of machining waste emulsions, in particular to a high-concentration emulsion wastewater treatment technology and device. According to the treatment technology and device, the treatment process is simple, water quality maintenance is facilitated, and separated oil slick can be recycled. The technology comprises the steps as follows: waste emulsions are collected and pumped into a reaction tank, the PH value is adjusted to 6-9, a demulsification flocculant is added, the obtained mixture enters a separation tank after stirring and subjectedto air flotation layering in the separation tank, an oil scraping device is used for scraping oil slick into a waste oil collecting tank, lower-layer clear water flows into a secondary treatment tank, an oxidizing agent and a water purifying agent are added to the secondary treatment tank, the PH value is adjusted to 8, and the obtained mixture is discharged into a sewage station after full stirring. The treatment technology is simple, automatic control is easy to realize, used agents are safe and clean and cause small harm to the environment, and used equipment is simple, easy to operate andlow in production cost and has low requirements for operators.

Description

technical field [0001] The invention relates to the field of harmless treatment of waste emulsions in mechanical processing, and in particular to a high-concentration emulsion wastewater treatment process and a treatment device thereof, which have a simple treatment process, are convenient for water quality maintenance, and can recycle separated slick oil. Background technique [0002] Emulsions are mainly used for lubrication and cooling during cutting and cold rolling in mechanical processing, and at the same time play an important role in metal rust prevention and metal corrosion prevention. The composition of the emulsion is complex, and the main components are 2~10% mineral oil and emulsifier. As the production progresses, the performance of the emulsion will inevitably decrease gradually and become corrupted, so it will be scrapped. Because of its complex composition, it is very harmful to the environment, followed by a large number of emulsion wastewater treatment pro...

Claims

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Application Information

Patent Timeline
27 Jul 2018
Publication
CN108328787A
IPC
C02F9/04
CPC
C02F1/24; C02F1/40; C02F1/5236; C02F1/66; C02F1/722; C02F9/00
Inventors
张境泉; 张永钢