Treatment method and separation recovering system of waste cutting liquid

Abstract

The invention discloses a treatment method and a separation recovering system of a waste cutting liquid, belonging to the technical field of chemical equipment. The technical scheme is as follows: the treatment method comprises the steps: heating and pressurizing a waste cutting liquid to be treated and then coarsely filtering to remove solid impurities; performing film filtration and separation on the coarsely filtered waste cutting liquid to obtain a cutting clear liquid and a cutting concentrated liquid; and treating the cutting concentrated liquid as a dangerous waste liquid, making the cutting clear liquid be used for preparing a cutting liquid again or conveying the cutting clear liquid to a sewage treatment system, and discharging after the cutting liquid reaches the standard through biochemical treatment. The treatment method disclosed by the invention is simple and reliable in operation and high in separation efficiency, and capable of effectively realizing separation of the cutting liquid from water. The separation recovering system is simple in structure, easy to operate, convenient to maintain, safe and reliable in operation, and good in treatment effect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection equipment, and in particular relates to a waste cutting fluid treatment method and a separation and recovery system. Background technique [0002] Cutting fluid is a commonly used coolant and lubricant in metal processing and mechanical processing. The process plays the roles of lubrication, cooling, cleaning and rust prevention. According to the chemical composition of the oil, the cutting fluid is divided into two categories: non-water-soluble (oil-based) fluid and water-soluble (water-based) fluid. Water-based cutting fluid can be divided into emulsion, semi-synthetic and fully synthetic cutting fluid. Generally, water-based cutting fluid is made by mixing pure cutting fluid with water. The ratio of cutting fluid to water varies according to different applications and manufacturers of cutting fluid, and cutting fluid usually accounts for 5% to 10%. [0003] Because the cutt...

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Problems solved by technology

However, the actual hazardous waste treatment center does not have a good treatment method for this waste cutting fluid. After collecting it, put it in a large pool and let it stand for a few months or even more than half a year. Finally, the supernatant mineral oil is mixed with other fuels and incinerated.

However, the chemical treatment effect of high-concentration organic wastewater in the lower layer is not good, and the cost of chemical treatment is higher, which is difficult to treat and cannot be completely harmless.

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