Treating system for oily sewage

Abstract

The invention discloses a treating system for oily sewage. Solid suspended particle substances and oil type substances contained in produced sewage can be stably removed, and the purpose of reusing sewage is achieved. The treating system comprises a mixed flow barrel and a settling oil removing device. An inner cavity of the mixed flow barrel is provided with a center mixing barrel, and a first flocculation settling zone is formed between the center mixing barrel and the wall of the mixed flow barrel. An inner cavity of the settling oil removing device is provided with an inner cylinder, a settling part is installed in the inner cylinder, the inner cylinder is divided into an upper clean water outlet zone and a lower third flocculation zone through the settling part, and a second flocculation settling zone is formed between the inner cylinder and the outer wall of the inner cavity of the settling oil removing device. A water inlet overflow groove is formed in the upper portion of the second flocculation settling zone of the settling oil removing device, and a draining pipe is arranged in the clean water outlet zone. By means of the treating system, water and mud separation can be efficiently conducted, saving of water resources is facilitated, and the environment is protected. In addition, water flow disturbance in the flocculation process can be effectively reduced, and thus the separation effect is improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to production sewage treatment systems in metallurgy, petrochemical, machinery and other industries. Background technique [0002] A lot of water resources are consumed in many production industries, such as dephosphorization on the surface of steel billets for rolling, water spray cooling, and cooling of multiple steel rolling links such as heating furnaces. The wastewater produced by iron and steel enterprises contains a large amount of impurities such as mineral oil, iron oxide scale, and water-washed slag. In order to prevent the wastewater from harming the environment, it is necessary to treat the wastewater in a harmless manner, which is conducive to recycling. The main purpose of sewage treatment is to remove suspended solid particles and grease, and also includes post-cooling and related subsequent advanced treatment to achieve the purpose of sewage reuse. The iron oxide sca...

AI Technical Summary

Problems solved by technology

Patent application number 200710099131.X, the invention patent titled "An Oily Sewage Treatment Device and Treatment Process" discloses a device that can simultaneously treat oily dirt and suspended sediments in sewage, but the equipment uses electroflocculation tanks, electric floating The two-stage treatment of the tank needs to use noble metals as electrodes, and also needs to be equipped with ozone generators, ultrasonic enhanced oxidizers, etc., and the equipment cost is relatively high

Moreover, most of the water inlets in the current various types of sewage treatment flocculation treatment equipment use pressure water inlet, so the water pressure of the inlet water will have an adverse effect on the flocculation treatment.

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