Pretreatment equipment for high concentration cutting fluid sewage

Abstract

The invention discloses high-concentration cutting liquid sewage pretreatment equipment, which comprises a demulsification pool, wherein one side of the demulsification pool is provided with a water inlet; the other side of the demulsification pool is sequentially provided with a chemical oxidation pool, a flocculation pool, an air floatation pool and a clean water pool; a mud residue collecting pool is arranged right under the demulsification pool, the chemical oxidation pool and the flocculation pool. The high-concentration cutting liquid sewage pretreatment equipment has the characteristics of reasonable structure, compact layout and good treatment effect; by aiming at the characteristics of ultrahigh concentration and little sewage quantity of metal processing cutting liquid, combined equipment integrating treatment technologies such as demulsification, chemical oxidation, flocculation, air floatation and residue discharging is adopted; the continuous operation can be adopted, and the intermittent batch operation can also be adopted; the metal processing high-concentration cutting liquid sewage can be effectively treated; therefore on one hand, the production cost of enterprises can be reduced, and on the other hand, the environment can be protected to the greatest degree, so that the environment pollution is reduced.

Description

technical field [0001] The invention relates to sewage pretreatment equipment, in particular to a pretreatment equipment for high-concentration cutting fluid sewage. Background technique [0002] The waste water in the process of metal machining mainly comes from coolant, organic cleaning liquid, spray paint waste water, EDM working fluid, etc. The amount of organic matter is small but the concentration of organic matter is high, among which the cooling liquid COD Cr Up to tens of thousands or even hundreds of thousands. There is a bottleneck in the treatment of high-concentration mechanical processing wastewater in China, and many combined treatment processes can successfully reduce its COD Cr However, it is very difficult to achieve the follow-up treatment conditions of conventional sewage. In recent years, with the advancement of metal machining production technology, the emulsions used have become more stable and difficult to break. At the same time, this type of wast...

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Problems solved by technology

However, these methods are difficult to achieve long-term stable and effective treatment, and have the following disadvantages: 1. The effect of conventional destabilization and oil removal is not good; 2. Micro-electrolysis fouling and fouling are ineffective; 3. Activated carbon adsorption cannot be desorbed and regenerated; 4. The operating cost and investment cost of ultrafiltration reverse osmosis membrane technology are very high

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