Energy-saving transformation device and transformation method of steel mill wastewater treatment system

Abstract

The invention relates to an energy-saving transformation device and transformation method for a wastewater treatment system of a steel mill. The device comprises a filter tank, a water purifying tank and a diluting and stirring tank, the three are vertically arranged from top to bottom, and the bottom surface of the filter tank is flush with the ground; the diluting and stirring tank is connected with a waste water inlet pipe; the waste water inlet pipe is connected with cooling waste water on equipment to be treated; a sewage lifting pump is arranged between the diluting and stirring tank and the filtering tank; a uniform stirring pump is arranged in the diluting and uniform stirring tank; purified water purified in the purified water tank enters a production workshop through a pipeline to cool equipment needing to be cooled, and a purified water lifting pump is arranged on the pipeline between the purified water tank and the equipment needing to be cooled; wastewater discharged from a production process line directly flows into the diluting and stirring tank, discharged sewage is not precipitated at the bottom of the tank by adopting a high-pressure pump, and sludge and waste residues originally precipitated at the bottom of a precipitation tank are not precipitated; as the water purification tank can supplement and dilute sewage in the uniform stirring tank, the concentration of a medium in water in the tank is reduced, and the service life of the sewage lifting pump and the service life of the uniform stirring pump are prolonged.

Description

technical field [0001] The invention relates to an energy-saving retrofit device and a retrofit method, in particular to an energy-saving retrofit method for a wastewater treatment system in a steel mill to realize closed-loop automatic control, improve efficiency, and reduce costs. Background technique [0002] Steelmaking plants are heavy industry, secondary industry, manufacturing industry, and capital-intensive industry, and have an irreplaceable position in our country; the raw materials of steelmaking plants are iron ore, coal, charcoal, etc., which are made through a series of high-temperature smelting, etc. required product. Steelmaking plants need a large amount of water for cooling treatment during steelmaking, and a large amount of sewage will also be generated during the production process. If the sewage is discharged directly, it will pollute the environment and cause a waste of resources. [0003] Iron and steel enterprises are not only industries with high wa...

AI Technical Summary

Problems solved by technology

However, this sedimentation method has a slow sedimentation speed and a long sedimentation time, which affects the working efficiency of sewage treatment work, and the sedimentation effect is poor.

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