CN113003641A

CN113003641A - Coating circulating water treatment agent

Info

Publication number: CN113003641A
Application number: CN202110147203.3A
Authority: CN
Inventors: 田景潭
Original assignee: Guangzhou Woerte Environmental Technology Co ltd
Current assignee: Guangzhou Woerte Environmental Technology Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-06-22

Abstract

The coating circulating water treatment agent comprises a solvent serving as a continuous phase, an adsorbent serving as a dispersed phase and used for adsorbing suspended matters, and an auxiliary agent used for adjusting charge balance and assisting flocculation, wherein the auxiliary agent comprises cationic polyacrylamide or polymerized phosphate. The formula agent is in a dispersed state in a system and can fully contact and react with the coating in water. Cationic polyacrylamide has 2 functions: charge balance and flocculation are carried out, and the charge level of circulating water is balanced, so that paint balls are easier to aggregate; meanwhile, the polyacrylamide has the function of bridging flocculation, so that the paint slag is flocculated and floats upwards, and the dispersibility of the adsorbent in the flocculation process is improved. The kaolin has large specific surface area, large cation exchange capacity and strong adsorption capacity and plays an important role as an adsorption framework; the purpose of removing viscosity can be achieved through adsorption. The polymerized phosphate improves the dispersibility and the solubility of the kaolin in water; isothiazolinone inhibits microorganism, prolongs the shelf life of the product.

Description

Coating circulating water treatment agent

Technical Field

The invention relates to the technical field of water treatment, in particular to a coating circulating water treatment agent.

Background

Painting is an important step in modern product manufacturing processes. The quality of antirust and anticorrosive coatings is one of the important aspects of the overall quality of products. The appearance quality of the product not only reflects the protection and decoration performance of the product, but also is an important factor forming the value of the product. Along with the wide application of coating, the collection of coating paint mist is more and more emphasized, and the collection of the coating paint mist is basically collected by circulating water at present. The general coating circulating water contains a large amount of toxic and harmful substances such as paint molecules, thinner and the like, and contains a large amount of nonionic wetting dispersant, emulsifier and anionic surfactant. Generally, the coating wastewater is treated by using a sewage treatment agent such as a paint mist coagulant or a flocculating agent, and the treated wastewater can be recycled, so that the enterprise cost is reduced.

In order to purify coating circulating water, an adsorbent in a treating agent used for the coating wastewater is a main component, and the adsorbent adsorbs waste in the circulating water, and then the waste is subjected to a series of processes such as flocculation, precipitation, filtration and the like and then is discharged for recycling, for example, a coating circulating water treating agent disclosed in Chinese patent CN 111729639A and a preparation method thereof use sepiolite as a main adsorption component. However, the existing adsorbent has poor dispersibility in the flocculation process, specifically flocculates are easy to precipitate, and in actual use, the medicament is expected to be fully suspended and dispersed in the water environment, the effective treatment time is the effective treatment time, and the medicament is concentrated and precipitated in the precipitation stage.

Disclosure of Invention

The invention aims to solve the technical problems of insufficient effective treatment time and easy sedimentation in the flocculation process of the treatment agent in the prior art aiming at the defects and shortcomings, and provides a coating circulating water treatment agent.

In order to achieve the purpose, the invention adopts the following specific technical scheme:

the coating circulating water treatment agent comprises a solvent serving as a continuous phase, an adsorbent serving as a dispersed phase and used for adsorbing suspended matters, and an auxiliary agent used for adjusting charge balance and assisting flocculation, wherein the auxiliary agent comprises cationic polyacrylamide or polymerized phosphate.

Preferably, it comprises by mass:

50 to 105 parts of a solvent,

10-50 parts of adsorbent,

And 1-5 parts of an auxiliary agent.

Preferably, it comprises by mass:

50-70 parts of solvent,

20-35 parts of adsorbent,

And 1-3 parts of an auxiliary agent.

Preferably, the adsorbent comprises kaolin.

Preferably, the adsorbent further comprises a dispersing agent for improving the dispersibility and the solubility of the adsorbent, wherein the dispersing agent comprises one or two of 2-3 parts by mass of sodium polyacrylate or 3-5 parts by mass of polymerized phosphate.

Preferably, the product also comprises an inhibitor for inhibiting microorganisms to prolong the storage period of the product,

the inhibitor includes 1 part by mass of isothiazolinone.

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

the formula agent is in a dispersed state in a system and can fully contact and react with the coating in water. Cationic polyacrylamide has 2 functions: charge balance and flocculation are carried out, and the charge level of circulating water is balanced, so that paint balls are easier to aggregate; meanwhile, the polyacrylamide has the function of bridging flocculation, so that the paint slag is flocculated and floats upwards, and the dispersibility of the adsorbent in the flocculation process is improved. The kaolin has large specific surface area, large cation exchange capacity and strong adsorption capacity, and plays an important role in the adsorption of the coating as an adsorption framework of the water suspension coating; the purpose of removing viscosity can be achieved through adsorption. The function of the polymerized phosphate is to improve the dispersibility and solubility of the kaolin in water; isothiazolinone inhibits microorganism, prolongs the shelf life of the product.

Detailed Description

The present invention is further explained and illustrated by the following embodiments, which should be understood to make the technical solution of the present invention clearer and easier to understand, and not to limit the scope of the claims.

Example 1

This embodiment 1 provides a coating circulating water treatment agent, specifically a flocculant for coating circulating water treatment, comprising the following steps:

respectively weighing 130g of kaolin, 12g of sodium polyacrylate, 19g of polymerized phosphate, 6g of cationic polyacrylamide and 6g of thiazolinone,

and dissolving the weighed components in 320g of water, and uniformly stirring to obtain the flocculant product.

Example 2

This embodiment 2 provides a coating circulating water treatment agent, specifically a flocculant for coating circulating water treatment, comprising the following steps:

150g of kaolin, 13g of sodium polyacrylate, 21g of polymeric phosphate, 13g of cationic polyacrylamide and 6.5g of thiazolinone are weighed respectively,

and dissolving the weighed components in 300g of water, and uniformly stirring to obtain the flocculant product.

Example 3

This embodiment 3 provides a coating circulating water treatment agent, specifically a flocculant for coating circulating water treatment, comprising the following steps:

weighing 140g of kaolin, 12g of sodium polyacrylate, 20g of polymeric phosphate, 10g of cationic polyacrylamide and 6g of thiazolinone,

and dissolving the weighed components in 310g of water, and uniformly stirring to obtain the flocculant product.

Comparative example 1

The flocculant of comparative example 1 comprises 140g of sepiolite, 12g of sodium polyacrylate, 20g of polymeric phosphate, 10g of polyacrylamide, 6g of thiazolinone,

the weighed components are dissolved in 310g of water and stirred uniformly.

The samples of examples 1 to 3 and comparative example 1 were each charged into a 5 ton/h paint-drainage circulating water system, and Chemical Oxygen Demand (COD), turbidity, Suspended Solids (SS) and water change period were measured.

In order to highlight the comparison results, coating circulating water without any agent was introduced as a blank, and the sewage conditions of the blank were substantially the same as those of examples 1 to 3 and comparative example 1.

Comparison and analysis of results

TABLE 1 results of treatment of coating circulating water

	Chemical Oxygen Demand (COD)	Turbidity of water	Suspended solids SS	Period of water change
					Unit of	mg/L	NTU	mg/L	Sky
Blank control	20190	>800	120	15
					Example 1	4385	<300	32	60
Example 2	4115	<300	28	60
					Example 3	4235	<300	30	60
Comparative example 1	8361	<500	70	45

As can be seen from Table 1, the effect of treating the circulating water system in examples 1 to 3 was good, and the effect of treating the circulating water system in comparative example 1 was poor without adding the flocculant. In the experiment, all parameters of the initial sewage are kept basically consistent with the water environment without the flocculant.

While the present invention has been described by way of examples, and not by way of limitation, other variations of the disclosed embodiments, as would be readily apparent to one of skill in the art, are intended to be within the scope of the present invention, as defined by the claims.

Claims

1. A coating circulating water treatment agent is characterized in that:

comprises a solvent as a continuous phase, an adsorbent as a dispersed phase for adsorbing suspended matters, and an auxiliary agent for adjusting charge balance and assisting flocculation,

wherein the auxiliary agent comprises cationic polyacrylamide or polymerized phosphate.

2. The coating circulation water treatment agent according to claim 1, characterized in that:

comprising by mass:

50 to 105 parts of a solvent,

10-50 parts of adsorbent,

And 1-5 parts of an auxiliary agent.

3. The coating circulation water treatment agent according to claim 2, characterized in that:

comprising by mass:

50-70 parts of solvent,

20-35 parts of adsorbent,

And 1-3 parts of an auxiliary agent.

4. The coating circulation water treatment agent according to claim 1, characterized in that:

the adsorbent comprises kaolin.

5. The coating circulation water treatment agent according to claim 1, characterized in that:

also comprises a dispersant for improving the dispersibility and the solubility of the adsorbent,

the dispersing agent comprises 2-3 parts by mass of sodium polyacrylate or 3-5 parts by mass of one or two of polymerized phosphate.

6. The coating circulation water treatment agent according to claim 1, characterized in that:

also comprises an inhibitor for inhibiting microorganisms to prolong the storage period of the product,

the inhibitor includes 1 part by mass of isothiazolinone.