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Demulsification device and method

A demulsification device and demulsification technology, which are applied in chemical instruments and methods, separation methods, grease/oily substances/floating matter removal devices, etc., can solve the problems of narrow application range, increased processing cost, long reaction time, etc.

Pending Publication Date: 2018-01-12
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention uses high molecular polymers to demulsify, the medicament is expensive, and the application range is narrow, and the use of microwaves further increases the processing cost
[0004] Chinese patent CN106495362A discloses a demulsification method of waste emulsion, which is operated at normal temperature and pressure, with simple process and strong applicability, but the demulsification time is more than 8 hours, the reaction time is too long, and the operation and management are inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The waste emulsion in this example was taken from the cutting fluid of a machining factory in Langfang. Table 1 is the water quality detection index of the cutting fluid. Among them, SS means suspended solids.

[0058] Table 1 Water quality detection index of a certain cutting fluid

[0059]

[0060] The cutting fluid contains less oil, and the solution is milky white, and is demulsified by directly demulsifying and precipitating. That is, in the emulsification device according to the present invention, the first passage (for example, the first valve) is closed / disconnected, and the second passage (for example, the second valve) is opened / connected.

[0061] The waste emulsion to be treated is introduced into the waste emulsion storage container, and then enters into the demulsification reaction container through the feed pump. Since the pH of the waste emulsion is 8, there is no need to add alkali, directly add 0.2% calcium chloride from the inorganic salt feeding p...

Embodiment 2

[0064] The waste emulsion was taken from a machine processing factory in Langfang. Table 2 is the water quality detection index of the waste emulsion.

[0065] Table 2 Water quality detection index of a certain waste emulsion

[0066]

[0067] The cutting fluid contains less oil, and the solution is milky white, and is demulsified by directly demulsifying and precipitating. That is, in the emulsification device according to the present invention, the first passage (for example, the first valve) is closed / disconnected, and the second passage (for example, the second valve) is opened / connected.

[0068] The waste emulsion to be treated is introduced into the waste emulsion storage container, and then enters into the demulsification reaction container through the feed pump. Since the pH of the waste emulsion is 5, directly add 0.1% calcium hypochlorite (which can not only break the emulsion, but also oxidize and degrade COD, and adjust the pH value) from the inorganic salt fe...

Embodiment 3

[0071] The waste emulsion was taken from a machine processing factory in Langfang. Table 3 is the water quality detection index of the waste emulsion.

[0072] Table 3 Water quality detection index of a certain waste emulsion

[0073]

[0074] The cutting fluid contains less oil, and the solution is milky white, and is demulsified by directly demulsifying and precipitating. That is, in the emulsification device according to the present invention, the first passage (for example, the first valve) is closed / disconnected, and the second passage (for example, the second valve) is opened / connected.

[0075] The waste emulsion to be treated is introduced into the waste emulsion storage container, and then enters into the demulsification reaction container through the feed pump. Since the pH of the waste emulsion is 9, first adjust the pH to 7 by the strong acid dosing pump, then add 0.5% magnesium chloride by the inorganic salt feeding pump, stir for 5 minutes at a speed of 300r / ...

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Abstract

The invention relates to the technical field of water treatment and in particular relates to a demulsification device and method. The demulsification device comprises a demulsification reaction container, an air flotation container and a flocculating and settling container, wherein the outlet of the demulsification reaction container is alternatively connected with the inlet of the air flotation container and the inlet of the flocculating and settling container; the lower outlet of the air flotation container is connected with the inlet of the demulsification reaction container.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a demulsification device and method. Background technique [0002] In the machining industry, emulsions are generally used to cool, lubricate, clean, and prevent rust on lathes during the production process, so as to prolong the service life of lathes. The waste emulsion generated in this production process is the main source of pollution in mechanical processing plants. The waste emulsion is stable in nature and complex in composition, and its COD can reach tens of thousands to hundreds of thousands mg / L. It has poor biodegradability and is difficult to treat. At present, the treatment methods of waste emulsion at home and abroad are usually demulsification plus biochemical treatment, or demulsification plus oxidation regeneration treatment. Among them, demulsification is the core part of treating waste emulsion. Commonly used demulsification methods are: acidificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F9/04
Inventor 冷超群边文强董涛孙慧峰么瑞静
Owner ENN ENVIROTECH CO LTD
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