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System and method for removing COD and calcium ions in cold rolling dilute alkali reverse osmosis concentrated water

A technology for reverse osmosis concentrated water and calcium ions, which is used in chemical instruments and methods, water pollutants, metallurgical wastewater treatment, etc. Difficulty in resource utilization and other problems, to achieve the effect of reducing environmental pollution

Active Publication Date: 2020-12-01
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce wastewater discharge, reverse osmosis technology is used to treat the cold rolling dilute alkali wastewater that meets the standard discharge. The water produced by reverse osmosis can be used in production. The high content of COD and calcium ions in reverse osmosis concentrated water makes it difficult to further recycle the reverse osmosis concentrated water. utilization
[0004] However, so far, there is no treatment method and process for simultaneously removing COD and calcium ions in cold-rolled dilute alkali reverse osmosis concentrated water

Method used

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  • System and method for removing COD and calcium ions in cold rolling dilute alkali reverse osmosis concentrated water

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A cold-rolled dilute alkali reverse osmosis concentrated water treatment system, including a water inlet pump, a modified chitosan adsorption reaction tower, a modified chitosan-activated carbon mixed filler, a lift pump, a modified resin adsorption tower, and a modified chloromethyl Chemicalized polystyrene chelating resin, water pump. See figure 1 .

[0030] The water quality characteristics of the cold-rolled dilute alkali reverse osmosis concentrated water: the conductivity is 34500 μs / cm, the pH is 7.5, the COD is 55 mg / L, and the calcium ion is 65 mg / L.

[0031] The cold-rolled dilute alkali reverse osmosis concentrated water is pumped into the modified chitosan adsorption reaction tower from the bottom through the water inlet pump, and the modified chitosan-activated carbon mixed filler is placed in the modified chitosan adsorption reaction tower, and the water outlet is a modified chitosan adsorption reaction tower. The upper part of the chitosan adsorption re...

Embodiment 2

[0039] A cold-rolled dilute alkali reverse osmosis concentrated water treatment system, including a water inlet pump, a modified chitosan adsorption reaction tower, a modified chitosan-activated carbon mixed filler, a lift pump, a modified resin adsorption tower, and a modified chloromethyl Chemicalized polystyrene chelating resin, water pump.

[0040] The water quality characteristics of the cold-rolled dilute alkali reverse osmosis concentrated water: the electrical conductivity is 41200 μs / cm, the pH is 8.1, the COD is 41 mg / L, and the calcium ion is 52 mg / L.

[0041] The cold-rolled dilute alkali reverse osmosis concentrated water is pumped into the modified chitosan adsorption reaction tower from the bottom through the water inlet pump, and the modified chitosan-activated carbon mixed filler is placed in the modified chitosan adsorption reaction tower, and the water outlet is a modified chitosan adsorption reaction tower. The upper part of the chitosan adsorption reaction...

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Abstract

The invention discloses a cold rolling dilute alkali reverse osmosis concentrated water treatment system. The system comprises a water inlet pump and a reaction tower, the water inlet pump is connected with a modified chitosan adsorption reaction tower, a modified chitosan-activated carbon mixed filler is arranged in the modified chitosan adsorption reaction tower, and the modified chitosan adsorption reaction tower is sequentially connected with a lifting pump, a modified resin adsorption tower and a water outlet pump; and modified chloromethylated polystyrene chelate resin is arranged in themodified resin adsorption tower. The invention further provides a method for removing COD and calcium ions in the cold-rolled dilute alkali reverse osmosis concentrated water. The economical and efficient pollutant treatment process is developed according to the water quality and water quantity conditions of the cold rolling reverse osmosis concentrated water, cyclic utilization, energy conservation and emission reduction are taken as main tasks, environmental pollution is reduced, and increasingly strict environmental protection laws and regulations can be actively coped with.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a cold rolling reverse osmosis concentrated water advanced treatment method and treatment device. 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] Cold rolling dilute alkali wastewater mainly comes from the oil depot drainage of various units such as rolling mill unit, grinding roll room and strip steel degreasing unit. After conventional treatment, the cold-rolled dilute alkali wastewater is discharged up to the standard. In order to reduce wastewater discharge, reverse osmosis techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F101/10C02F103/16
CPCC02F1/286C02F1/283C02F1/285C02F2103/16C02F2101/10Y02A20/131
Inventor 李恩超刘颖昊刘涛顾德仁殷玫婕
Owner BAOSHAN IRON & STEEL CO LTD
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