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A treatment process for decolorized resin regeneration waste liquid

A technology for regenerating waste liquid and processing technology, which is applied in the chemical field, can solve problems such as poor results, and achieve the effects of reducing environmental protection burden, simple production process, and simple control process

Active Publication Date: 2019-09-20
凌国庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a treatment process for decolorized resin regeneration waste liquid, so as to solve the problems such as poor effect in the prior art

Method used

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  • A treatment process for decolorized resin regeneration waste liquid

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Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 Shown, the treatment process of a kind of decolorization resin regeneration waste liquid of the present invention comprises the following steps:

[0046] (1) pre-filtering the resin regeneration liquid waste liquid through a security filter, and then decolorizing the security filter filtrate through a nanofiltration membrane to obtain a nanofiltration membrane clear liquid to be used for resin regeneration;

[0047] (2) Add milk of lime to the nanofiltration membrane concentrate, and then feed it with flue gas or carbon dioxide gas;

[0048] (3) Filtrate the fully charged nanofiltration membrane dope through the plate frame, then decolorize the obtained plate frame clear liquid through nanofiltration membrane filtration, the decolorization liquid is also used for resin regeneration, and the dope is also returned to step (2) process.

[0049] In step (1), the security filter is a bag filter with a filtration accuracy of 1um and a filtration pressure of...

Embodiment 2

[0055] Such as figure 1 Shown, the treatment process of a kind of decolorization resin regeneration waste liquid of the present invention comprises the following steps:

[0056] (1) pre-filtering the resin regeneration liquid waste liquid through a security filter, and then decolorizing the security filter filtrate through a nanofiltration membrane to obtain a nanofiltration membrane clear liquid to be used for resin regeneration;

[0057] (2) Add milk of lime to the nanofiltration membrane concentrate, and then feed it with flue gas or carbon dioxide gas;

[0058] (3) Filtrate the fully charged nanofiltration membrane dope through the plate frame, then decolorize the obtained plate frame clear liquid through nanofiltration membrane filtration, the decolorization liquid is also used for resin regeneration, and the dope is also returned to step (2) process.

[0059] In step (1), the security filter is a bag filter with a filtration precision of 10um and a filtration pressure ...

Embodiment 3

[0065] Such as figure 1 Shown, the treatment process of a kind of decolorization resin regeneration waste liquid of the present invention comprises the following steps:

[0066] (1) pre-filtering the resin regeneration liquid waste liquid through a security filter, and then decolorizing the security filter filtrate through a nanofiltration membrane to obtain a nanofiltration membrane clear liquid to be used for resin regeneration;

[0067] (2) Add milk of lime to the nanofiltration membrane concentrate, and then feed it with flue gas or carbon dioxide gas;

[0068] (3) Filtrate the fully charged nanofiltration membrane dope through the plate frame, then decolorize the obtained plate frame clear liquid through nanofiltration membrane filtration, the decolorization liquid is also used for resin regeneration, and the dope is also returned to step (2) process.

[0069] In step (1), the security filter is a bag filter with a filtration accuracy of 5um and a filtration pressure of...

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Abstract

The invention discloses a treatment technology of decolorized resin regenerated waste liquid. The treatment technology comprises the following steps: after filtering the decolorized resin regeneratedwaste liquid through a filter, filtering through a nano-filtration membrane; recycling permeated liquid; adding lime milk into obtain intercepted liquid; introducing flue gas and fully filling; aftercarrying out plate and frame filtering on a fully-filled mixing system, recycling permeated liquid and repeating the operation on intercepted liquid. Compared with the prior art, pigments in resin regenerated waste liquid can be effectively removed; the recycling rate of resin regenerated liquid is high and the production cost is low; the treatment technology is simple to operate and has the advantages of high efficiency, energy saving and emission reduction.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a treatment process for decolorized resin regeneration waste liquid. Background technique [0002] Ion exchange resins can be widely used in water treatment, food industry, pharmaceutical industry, synthetic chemistry and petrochemical industry, environmental protection industry, hydrometallurgy industry, etc., mainly used for desalination, decolorization, product purification, etc. The decolorizing resin is mainly used for the efficient removal of polyphenol pigments, caramel pigments, natural pigments, etc. in the food industry. It has a wide range of decolorization, high decolorization capacity, can remove various ions, can be regenerated repeatedly, has a long working life and low operating costs. The reusability of ion exchange resins is one of the main advantages of ion exchange resins being widely used in industrial production [0003] After the ion exchange resin ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 凌国庆
Owner 凌国庆
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