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Ion exchange resin wastewater zero-emission treatment method

The technology of an ion exchange resin and a treatment method is applied in the field of zero discharge treatment of ion exchange resin wastewater, which can solve the problems of high cost, high treatment difficulty and high salt content in wastewater, and achieve the effects of cost realization, pollution avoidance and zero discharge realization.

Inactive Publication Date: 2017-12-26
BEIJING TINGRUN MEMBRANE TECH DEV
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  • Abstract
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Problems solved by technology

This wastewater has high salt content, high hardness, and contains COD, which causes problems such as high difficulty in treatment and high cost.

Method used

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  • Ion exchange resin wastewater zero-emission treatment method
  • Ion exchange resin wastewater zero-emission treatment method

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Embodiment Construction

[0022] Such as figure 1 As shown, the ion exchange resin wastewater zero-discharge treatment method provided by the present invention comprises the following steps:

[0023] S01: Anion and cation exchange: waste water is passed into the cation exchanger and anion exchanger in sequence; the acid regeneration waste liquid is extracted by the cation exchanger, and the alkali regeneration waste liquid is extracted by the anion exchanger; the rest is clean ion exchange water. Anion and cation exchange can exchange calcium, magnesium and other ions contained in wastewater. In order to ensure that the hardness of the remaining ion exchanged water is lower than 0.03mmol / L, it is necessary to control the pH of the cation exchanger and anion exchanger between 1- Between 14. The cation exchanger is a hydrogen type cation exchanger filled with strong acid cation resin. After the cations in the wastewater are exchanged with the hydrogen ions in the strongly acidic cation exchange resin, ...

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Abstract

The invention provides an ion exchange resin wastewater zero-emission treatment method, relates to the field of wastewater treatment and aims to provide a low-cost environmental-friendly wastewater treatment method. The method comprises the following steps: S01, performing anion-cation exchange, namely introducing wastewater into a cation exchanger and an anion exchanger in sequence, extracting an acid regenerated waste liquid from the cation exchanger, and extracting an alkali regenerated waste liquid from the anion exchanger; S02, performing diffusion dialysis, namely introducing the acid regenerated waste liquid into a diffusion dialysis anion membrane to form an acid regenerated liquid and a waste acid liquid, and introducing the alkali regenerated waste liquid into a diffusion dialysis cation membrane to form an alkali regenerated liquid and a waste alkali liquid; S03, performing neutralization separation, namely respectively introducing a diffusion dialysis waste acid liquid and a diffusion dialysis alkali liquid into a neutralization separation unit, neutralizing the diffusion dialysis waste acid liquid and the diffusion dialysis alkali liquid, discharging organic matters through air flotation, forming a precipitate from divalent or more ions, and collecting the residue as a neutralized waste liquid; S-4, treating with a bipolar membrane, namely introducing the neutralized waste liquid into a bipolar membrane unit, finally converting into an acid regenerated liquid and an alkali regenerated liquid, and collecting the residue as light salt brine.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a zero-discharge treatment method for ion exchange resin wastewater. Background technique [0002] At present, among the many technologies for preparing pure water, the technology of preparing pure water by ion exchange resin desalination still occupies a dominant position. This technology is mainly used for the preparation of pure water in the fields of electronics, energy, chemical industry, food and pharmaceuticals. Commonly used cation exchange resins are H-type strongly acidic cation-exchange resins, and anion-exchange resins are OH-type strongly basic anion-exchange resins, which can respectively exchange cations and anions in the influent salt to obtain pure water. The resin that has lost its exchange capacity can be regenerated with acid and alkali to restore its exchange capacity. [0003] There are many problems in this acid-base regeneration ion exchange resin meth...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/42C02F1/44C02F1/4693C02F1/66C02F9/00C02F2001/422C02F2001/425
Inventor 郭春禹贾春花张丽丽郭雄军刘芬
Owner BEIJING TINGRUN MEMBRANE TECH DEV
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