阅读说明：本技术 一种离子交换树脂中的梯次酸处理方法 (Echelon acid treatment method in ion exchange resin ) 是由 蔡小华 钱平 蒋岳峰 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种离子交换树脂中的梯次酸处理方法,涉及树脂再生技术领域,所述离子交换树脂中的梯次酸处理方法如下：S1、酸液10份、蒸馏水若100份、离子交换树脂若干份及电解水设备一套；S2、酸液与水混合,调配出10份不同浓度酸液,酸液的浓度梯度控制为5％,浓度区间为5％至55％；S3、对离子交换树脂进行下述任意一种梯次酸处理。本发明通过电解水设备对蒸馏水进行持续的酸度调节,使离子交换树脂混合的溶液持续且缓慢的降低酸度,更好的与离子交换树脂进行酸交换；本发明通过电解水设备对混合后的蒸馏水进行继续调节,避免传统梯次酸交换法需要调制多组酸液的弊病,减少了酸液的调制份数,从而减少了反应尾水的产生。(The invention discloses a echelon acid treatment method in ion exchange resin, which relates to the technical field of resin regeneration, and comprises the following steps: s1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment; s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%; s3, carrying out the following gradient acid treatment on the ion exchange resin. The invention carries out continuous acidity adjustment on distilled water through the water electrolysis equipment, so that the acidity of the solution mixed with the ion exchange resin is continuously and slowly reduced, and the solution is better subjected to acid exchange with the ion exchange resin; the mixed distilled water is continuously regulated by the water electrolysis equipment, the defect that a plurality of groups of acid liquor need to be prepared by the traditional echelon acid exchange method is avoided, the preparation amount of the acid liquor is reduced, and the generation of reaction tail water is reduced.)

1. A echelon acid treatment method in ion exchange resin is characterized in that: the gradient acid treatment method in the ion exchange resin comprises the following steps:

s1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment;

s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%;

s3, carrying out any one of the following gradient acid treatments on the ion exchange resin, wherein the method comprises the following steps:

the method comprises the following steps: placing the ion exchange resin in 55% acid liquor, circularly mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 5% for next mixing, and repeating the operation until the acid liquor with the concentration lower by 5%;

the second method comprises the following steps: placing the ion exchange resin in 55% acid liquor, circularly mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 10% for next mixing, and repeating the operation until the acid liquor with the concentration of 5%;

the third method comprises the following steps: electrolyzing distilled water by an electrolytic water device, continuously adjusting acidity in the solution by the electrolytic water device, placing ion exchange resin in the electrolytic water for circular mixing, recording the change of the acidity in an electrolytic water circulating pipe, and taking out the ion exchange resin when the acidity approaches 5%.

And S4, putting the taken-out ion exchange resin into clean water for washing, and taking out the ion exchange resin.

2. The method of claim 1, wherein the step acid treatment is performed on the ion exchange resin by: the acid solution is mixed solution of hydrochloric acid, sodium chloride and sodium hydroxide or similar Fe-free acid solution.

Technical Field

The invention relates to the technical field of resin regeneration, in particular to a echelonic acid treatment method in ion exchange resin.

Background

Ion exchange resins can be further classified into styrene resins and acrylic resins according to the types of the matrixes, the types of chemically active groups in the resins determine the main properties and types of the resins, and in practical use, the resins are often converted into other ion types for operation so as to meet various requirements.

The ion exchange resin needs to be regenerated through a gradient acid treatment method after being used, while the traditional gradient acid treatment method needs interval operation, the interval operation can affect the ion exchange resin, and the traditional gradient acid treatment method needs to be provided with a plurality of acid solutions, so that a large amount of tail water is remained after the treatment.

Disclosure of Invention

The invention aims to: in order to solve the problems of effect loss and excessive tail water caused by gradient intervals in the gradient acid treatment of the conventional ion exchange resin, a gradient acid treatment method in the ion exchange resin is provided.

In order to achieve the purpose, the invention provides the following technical scheme: a method for gradient acid treatment in ion exchange resin comprises the following steps:

s1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment;

s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%;

s3, carrying out any one of the following gradient acid treatments on the ion exchange resin, wherein the method comprises the following steps:

the method comprises the following steps: placing the ion exchange resin in 55% acid liquor, circularly mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 5% for next mixing, and repeating the operation until the acid liquor with the concentration lower by 5%;

the second method comprises the following steps: placing the ion exchange resin in 55% acid liquor, circularly mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 10% for next mixing, and repeating the operation until the acid liquor with the concentration of 5%;

the third method comprises the following steps: electrolyzing distilled water by an electrolytic water device, continuously adjusting acidity in the solution by the electrolytic water device, placing ion exchange resin in the electrolytic water for circular mixing, recording the change of the acidity in an electrolytic water circulating pipe, and taking out the ion exchange resin when the acidity approaches 5%.

And S4, putting the taken-out ion exchange resin into clean water for washing, and taking out the ion exchange resin.

Preferably, the acid solution is a mixed solution of hydrochloric acid, sodium chloride and sodium hydroxide or an approximate Fe-free acid solution.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention carries out continuous acidity adjustment on distilled water through the water electrolysis equipment, so that the acidity of the solution mixed with the ion exchange resin is continuously and slowly reduced, and the solution is better subjected to acid exchange with the ion exchange resin;

2. the mixed distilled water is continuously regulated by the water electrolysis equipment, the defect that a plurality of groups of acid liquor need to be prepared by the traditional echelon acid exchange method is avoided, the preparation amount of the acid liquor is reduced, and the generation of reaction tail water is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

S1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment;

s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%;

s3, placing the ion exchange resin in 55% acid liquor for circular mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 5% for next mixing, and repeating the operation until the acid liquor with the concentration lower by 5%.

And S4, putting the taken-out ion exchange resin into clean water for washing, and taking out the ion exchange resin.

Example 2

S1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment;

s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%;

s3, placing the ion exchange resin in 55% acid liquor for circular mixing, sampling and recording a leakage curve, taking out the ion exchange resin when the acidity approaches to a threshold value, putting the ion exchange resin into the acid liquor with the concentration lower by 10% for next mixing, and repeating the operation until the acid liquor with the concentration of 5%.

And S4, putting the taken-out ion exchange resin into clean water for washing, and taking out the ion exchange resin.

Example 3

S1, 10 parts of acid liquor, 100 parts of distilled water, a plurality of parts of ion exchange resin and a set of water electrolysis equipment;

s2, mixing the acid liquor with water, and preparing 10 parts of acid liquor with different concentrations, wherein the concentration gradient of the acid liquor is controlled to be 5%, and the concentration range is 5% to 55%;

and S3, electrolyzing the distilled water through the water electrolysis equipment, continuously adjusting the acidity in the solution through the water electrolysis equipment, placing the ion exchange resin into the electrolyzed water, circularly mixing, recording the change of the acidity in the electrolyzed water circulation pipe, and taking out the ion exchange resin when the acidity approaches 5%.

And S4, putting the taken-out ion exchange resin into clean water for washing, and taking out the ion exchange resin.

Example 4

The ion exchange resin was divided into 3 parts on average, treated by the methods provided in examples 1, 2 and 3 of the present invention, and the exchange capacity of the ion exchange resin after exchange was measured, and the results are shown in table 1.

Table 1: comparative results of ion exchange resin exchange Capacity after treatment of ion exchange resins by the methods provided in examples 1, 2 and 3 (numerical units in mmol/ml in the tables)

As can be seen from Table 1, the ion exchange resin after the first regeneration treatment of the ion exchange resin by the methods provided in examples 1 and 3 of the present invention still has an exchange capacity of 4.0 or more, while the ion exchange resin after the first regeneration treatment of the ion exchange resin by the methods provided in examples 1 and 2 of the comparative group still has an exchange capacity of 4.0 or more, and the ion exchange resin after the second regeneration treatment of the ion exchange resin by the methods provided in examples 1 and 2 of the comparative group has an exchange capacity of 3.6, and the advantages of example 3 after the third regeneration are more significant, thereby illustrating that the ion exchange resin after the treatment of the ion exchange resin by the methods provided in example 3 of the present invention has less damage to the exchange capacity of the ion exchange resin, the service life of the ion exchange resin can be prolonged, and the tail water generated by the circulating water is less, and the post-treatment cost of the waste water can be saved, and can protect the environment.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.