System and method for recycling waste emulsified cutting fluid

Abstract

The invention discloses a system and a method for recycling waste emulsified cutting fluid. The system comprises a collection tank, a screen device, a vibrating membrane ultrafiltration device, an evaporation device and a recycling tank, wherein the vibrating membrane ultrafiltration device comprises a machine shell, a membrane module and a motor; the membrane module extends downwards to form a central transmission rod; therefore, swinging can be initiated by matching centrifugal force generated by driving an eccentric block on the central transmission rod to rotate through the motor and a belt, the membrane module is vibrated by energy generated by the swinging through the central transmission rod, and shear force generated by high-frequency vibration is transferred in a sine mode via the surface of a diaphragm in the membrane module, so the problem of the stagnation of the diaphragm in the membrane module is solved, the capacity of resisting membrane pollution is high, the waste emulsified cutting fluid is treated simply and effectively, and a treatment effect is better. In addition, by the recycling system, filtrate and concentrated liquor can be separated continuously and effectively, the filtrate is inputted into the recycling tank to be used as blending cutting fluid, so the cost is saved; and the concentrated liquor is evaporated by the evaporation device to fulfill theaims of discharge reduction and waste reduction.

Description

technical field [0001] The invention relates to the technology in the field of wastewater treatment equipment, in particular to a system and method for recycling waste emulsified cutting fluid. Background technique [0002] In the process of turning, grinding, cutting and rolling, the machining industry generally uses emulsion to cool, lubricate, clean and prevent rust, so as to improve the quality of products and prolong the service life of machine tools. In addition to the hazards of general oily wastewater, waste emulsion is highly dispersed in water due to the action of surfactants, which are easier for animals, plants and aquatic organisms to absorb, and surfactants themselves are also harmful to organisms, and can also make some insoluble Toxic substances dissolved in water. In order to improve the rust resistance of the emulsion during processing, the added sodium nitrite is easily converted into carcinogenic nitrosamines, so the direct discharge of waste emulsified ...

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Problems solved by technology

[0006] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a system and method for recycling waste emulsified cutting fluid, which can effectively solve the problem that existing equipment and methods cannot simply and effectively recycle waste emulsified cutting fluid. The problem that the liquid is recycled and treated, and the treatment effect is not good

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