Treatment process for removing soluble organic carbon and total chromium in cold-rolling reverse osmosis concentrated water

Abstract

The invention provides a process system for simultaneously removing soluble organic carbon and total chromium in cold-rolling reverse osmosis concentrated water. The process system comprises a water inlet pump, a primary inclined plate sedimentation tank, a montmorillonite dosing tank and dosing pump, a montmorillonite-loaded iron-based reducing agent, a lifting pump, a modified activated carbon dosing box and dosing pump, a modified activated carbon coagulant, a secondary inclined plate sedimentation tank and a drainage pump. The invention further provides a method for treating the cold-rolling reverse osmosis concentrated water by using the process system. Through the addition of the montmorillonite-loaded iron-based reducing agent and the modified activated carbon adsorbent, the overallprocess is optimized, and a good effect is achieved. The invention provides the complete technical scheme of deep treatment of the cold-rolling reverse osmosis concentrated water for the first time,and the problem that the cold-rolling reverse osmosis concentrated water pollutes the environment is solved, so that the process system belongs to a green environment-friendly production process system of steel.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a technical scheme for dissolving organic carbon and total chromium in cold-rolled reverse osmosis concentrated water. Background technique [0002] As my country's basic industry, the iron and steel industry has developed rapidly since the reform and opening up, and has been in a high-speed development stage in recent years. However, the iron and steel industry is an industry with high energy consumption, high resources and high pollution, and its water consumption is huge, accounting for about 14% of the national industrial water consumption. [0003] The cold rolling wastewater mainly comes from the oil depot drainage of various units such as the rolling mill unit, the grinding roll room and the strip steel degreasing unit. After conventional treatment, the cold rolling dilute alkali oily wastewater can be discharged up to the standard. [0004] Wastewater reuse is t...

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Problems solved by technology

[0007] However, so far, there is no treatment method and process for removing dissolved organic matter and total chromium in cold rolling and reverse osmosis concentrated water. The water quality index after treatment meets the "Iron and Steel Industry Pollutant Discharge Standard" (GB13456-2012)

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