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

A technology of dissolved organic carbon and reverse osmosis concentrated water, which is applied in the field of water treatment, can solve the problems of treatment methods and processes that do not remove dissolved organic matter and total chromium, achieve good social and environmental benefits, and solve the effect of polluting the environment.

Active Publication Date: 2019-03-05
BAOSHAN IRON & STEEL CO LTD
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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 revers

Method used

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

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Example Embodiment

[0036] Example 1:

[0037] A process method for simultaneously removing dissolved organic carbon and total chromium in cold-rolled reverse osmosis concentrated water, comprising an inlet water pump, a first-stage inclined plate sedimentation tank, a montmorillonite dosing box and a dosing pump, and a montmorillonite-loaded iron-based reduction agent, lift pump, modified activated carbon dosing box and dosing pump, modified activated carbon coagulant, secondary inclined plate sedimentation tank, drainage pump (see figure 1 ).

[0038] The water quality characteristics of the cold-rolled reverse osmosis concentrated water are as follows: pH is 7.9, conductivity is 14800 μS / cm, dissolved organic carbon (DOC) is 45 mg / L, and total chromium is 5.2 mg / L.

[0039]The cold-rolled reverse osmosis concentrated water enters the first-stage inclined plate sedimentation tank through the inlet pump. The first-level inclined plate sedimentation tank is divided into two parts, the front par...

Example Embodiment

[0047] Example 2:

[0048] A process method for simultaneously removing dissolved organic carbon and total chromium in cold-rolled reverse osmosis concentrated water, comprising an inlet water pump, a first-stage inclined plate sedimentation tank, a montmorillonite dosing box and a dosing pump, and a montmorillonite-loaded iron-based reduction agent, lift pump, modified activated carbon dosing box and dosing pump, modified activated carbon coagulant, secondary inclined plate sedimentation tank, and drainage pump.

[0049] The water quality characteristics of the cold-rolled reverse osmosis concentrated water are as follows: pH is 6.3, conductivity is 17800 μS / cm, dissolved organic carbon (DOC) is 33 mg / L, and total chromium is 3.9 mg / L.

[0050] The cold-rolled reverse osmosis concentrated water enters the first-stage inclined plate sedimentation tank through the inlet pump. The first-level inclined plate sedimentation tank is divided into two parts, the front part is the sti...

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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...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/22C02F103/16C02F101/30
CPCC02F9/00C02F1/283C02F1/70C02F2001/007C02F2103/16C02F2101/22C02F2101/30
Inventor 李恩超叶倩祁庆琚殷玫婕吴昊
Owner BAOSHAN IRON & STEEL CO LTD
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