System for recycling of sewage of steel smelting raw material plant

Abstract

The invention discloses a system for recycling of sewage of a steel smelting raw material plant. The system comprises a sewage sedimentation tank, and a water overflow tank which is arranged around the sewage sedimentation tank is also included, wherein a water inlet of the sewage sedimentation tank is formed in the part, close to the lower end of the bottom, of the side wall of the sedimentationtank, a water outlet of the sewage sedimentation tank is formed in the part, close to the upper part, of the side wall of the sedimentation tank, and a No. 1 screen which is matched with the inner wall of the sedimentation tank is arranged in the part, below the water outlet, of the sedimentation tank; the top of the water overflow tank is lower than the top of the sedimentation tank, a water outlet of the water overflow tank is formed in the part, close to the bottom, of the water overflow tank, and a water drainage valve is arranged on a water drainage pipeline which is connected with the water outlet; and the tail end of the water drainage pipeline communicates with a sewage collection station, a No. 2 screen which is matched with the inner wall of the water overflow tank is arranged atthe middle-lower part of the water overflow tank, and a water level automatic monitoring device is arranged in the water overflow tank. Through the system, materials in the sedimentation tank can beprevented from being washed away by rainwater, the recycling utilization rate of the materials is increased, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a sewage recycling system for iron and steel smelting raw material plants. Background technique [0002] Iron and steel smelting is to smelt iron ore into pig iron, and then smelt pig iron into steel. The raw materials are mainly iron ore and coke. The work of the raw material factory is mainly to crush and crush the raw materials. Therefore, the sewage generated by the iron and steel smelting raw material factory mainly contains coal. powder, iron ore powder and other impurities, the existing raw material factory only discharges the sewage after simple sedimentation, which not only wastes water resources but also in case of heavy rain, because the sedimentation tank is exposed to the outside, the rainwater brought by the heavy rain will exceed the sedimentation The water storage capacity of the pool makes the sewage overflow from the sedimentation tan...

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Problems solved by technology

[0002] Iron and steel smelting is to smelt iron ore into pig iron, and then smelt pig iron into steel. The raw materials are mainly iron ore and coke. The work of the raw material factory is mainly to crush and crush the raw materials. Therefore, the sewage generated by the iron and steel smelting raw material factory mainly contains coal. powder, iron ore powder and other impurities, the existing raw material factory only discharges the sewage after simple sedimentation, which not only wastes water resources but also in case of heavy rain, because the sedimentation tank is exposed to the outside, the rainwater brought by the heavy rain will exceed the sedimentation The water storage capacity of the pond will make the sewage overflow from the sedimentation pond with rainwater, which will not only take away the recyclable materials in it, but also pollute the surrounding environment when it is discharged with the rainwater

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