Integrated purification treatment equipment of industrial wastewater of steel plant

Abstract

The invention discloses integrated purification treatment equipment of industrial wastewater of a steel plant. The equipment mainly comprises an adjustment tank, a lime softening and sedimentation tank, a folded-plate flocculating tank, a sloping-plate sedimentation tank and a valveless filtering tank; a pre-aeration device, a lifting pump and an ultrasonic liquid level instrument are arranged onthe bottom of the adjustment tank, a water distribution area and a pre-sedimentation area are arranged in the lime softening and sedimentation tank, a first reaction area, a second reaction area, a third reaction area and a buffering filtering area which are connected in sequence are arranged in the folded-plate flocculating tank, a second sloping plate is arranged on the middle portion of the sloping-plate sedimentation tank, and a plurality of perforated water collecting grooves are formed in the upper portion of the sloping-plate sedimentation tank. The equipment is reasonable in structuraldesign, has a good wastewater treatment effect and is capable of achieving zero-pollution discharging.

Description

technical field [0001] The invention relates to the field of wastewater treatment in iron and steel plants, in particular to integrated water purification treatment equipment for industrial wastewater in iron and steel plants. Background technique [0002] Iron and steel are often called ferrous metals, which can be divided into raw (cast) iron, wrought iron and steel. Due to different production processes, the sources and properties of wastewater are also different. From the sources, there are wastewater from ironmaking workshops, wastewater from steelmaking workshops and wastewater from steel rolling workshops. From the perspective of use, there are mainly two types of indirect cooling wastewater and washing wastewater. [0003] The main water equipment in ironmaking workshops are blast furnaces, hot blast stoves, blowers and cast iron devices. Water is mainly used for cooling of equipment and washing of blast furnace gas. After the cooling water is used, the temperatur...

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Problems solved by technology

[0006] It can be seen that the composition of the wastewater produced by the iron and steel plant is relatively complex, and the wastewater cannot be discharged directly, but needs to be treated before it can be discharged. At present, the treatment equipment for the wastewater in the iron and steel plant is relatively complicated, and the treatment effect is not good.

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