Continuous casting turbid circulating water treatment system and process

Abstract

The invention relates to a continuous casting turbid circulating water treatment system and a process thereof, and belongs to the field of continuous casting water treatment in the metallurgical industry. The system comprises a cyclone sedimentation tank, a closed muddy water purifier with pressure, a closed double-rotational-flow filter with pressure, a cooling tower and a cold water tank which are arranged in the water flow direction and sequentially communicated through pipelines. The muddy water purifier comprises a mixing tank and a treatment tank which are sequentially communicated through a pipeline in the water flow direction, and the upstream of the mixing tank is communicated with a dosing device leading to the mixing tank; a lifting pump is arranged on a pipeline, leading to themixing tank, of the cyclone sedimentation tank; the cold water tank is communicated with a backwashing pipeline leading to the double-cyclone filter, and a backwashing pump is arranged on the backwashing pipeline; the cold water tank is communicated with a water supply pipeline for supplying water to users, and a water supply pump is arranged on the water supply pipeline; and a treatment tank ofthe muddy water purifier and the double-cyclone filter are communicated with a slurry treatment device. The system is good in effluent quality, strong in impact load resistance, efficient, energy-saving, small in occupied area, flexible in arrangement, simple in operation management and suitable for new construction and transformation projects.

Description

technical field [0001] The invention belongs to the field of continuous casting water treatment in the metallurgical industry, and relates to a continuous casting turbid ring water treatment system and process. Background technique [0002] Continuous casting turbid ring water is the drainage of direct cooling, secondary spray cooling, slag flushing water for casting slabs, and cooling of equipment such as cutting machines and flame cleaning equipment in continuous casting production. Because the cooling water contacts with high-temperature casting slabs, the drainage contains Iron oxide scale, grease and sundries, the return water temperature is high, the content of suspended solids is large, and the pH is alkaline, so they cannot be recycled directly. [0003] The current main treatment process of continuous casting turbid ring water is a three-stage treatment process: cyclone sedimentation tank + chemical degreaser + sand filter + cooling tower for reuse after cooling. T...

AI Technical Summary

Problems solved by technology

Among them, the load of the chemical degreaser is relatively low, and the pressure relief of the outlet water needs to be upgraded twice, and the chemical degreaser needs to be stirred by a mixer to mix the return water and chemicals, so the treatment equipment occupies a large area, the amount of chemicals added is large, and the construction period is long , high energy consumption in operation, and the problem that the inclined pipe of the chemical degreaser is often crushed by the sludge compaction, the maintenance intensity of the workers is high; the ability of the sand filter to resist the impact load of water quality is poor, the backwashing water consumption is large, and the filter material is easy to be damaged The backwash is not clean, resulting in poor filtration effect and affecting the quality of effluent water

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