Efficient multifunctional multipurpose reverse osmosis membrane scale inhibitor as well as preparation method and application thereof

Abstract

The invention discloses an efficient multifunctional multipurpose reverse osmosis membrane scale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of water supply treatment and deep water treatment. The reverse osmosis membrane scale inhibitor comprises the following components: sodium ethylenediamine di(o-hydroxyphenylacetate), polyaminopolyether methylenephosphonic acid, hydrolyzed polymaleic anhydride, an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 2,2-dibromo-3-nitrilopropionamide, isothiazolinone and the balance ofdeionized water or reverse osmosis produced water. The reverse osmosis membrane scale inhibitor disclosed by the invention has the advantages of dispersing a colloid, conducting sterilizing, removingalgae, stripping membrane attachments and the like while realizing excellent scale inhibition performance, and is suitable for wide inflow water quality; and the reverse osmosis membrane scale inhibitor disclosed by the invention has biodegradability, so that a medicament can rapidly permeate into a membrane system to be effectively diffused into a water phase, and a comprehensive and efficient functional effect is achieved, therefore, the reverse osmosis membrane scale inhibitor can also be applied to garbage penetrating fluid membrane method treatment.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment and advanced water treatment, and in particular relates to a high-efficiency, multi-functional and multi-purpose reverse osmosis membrane scale inhibitor, its preparation method and application. Background technique [0002] At present, reverse osmosis membrane technology is widely used in the field of water treatment, especially in boiler feed water, ultra-pure water in the electronics industry, pure water for pharmaceutical and cosmetic industries, pure drinking water, and garbage seepage that has strict environmental protection requirements in recent years. processing industries. However, due to the characteristics of reverse osmosis membrane operation, the membrane surface on the concentrated water side is prone to chemical scaling deposits such as calcium salts, various metal oxides, and silicic acid compounds, as well as being polluted by colloids and microorganisms. As a res...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of reverse osmosis membrane operation, the membrane surface on the concentrated water side is prone to chemical scaling deposits such as calcium salts, various metal oxides, and silicic acid compounds, as well as being polluted by colloids and microorganisms.

As a result, the normal operation of the reverse osmosis device is affected, and the quantity and quality of the produced water are reduced. Therefore, the reverse osmosis membrane must be shut down frequently for online or offline cleaning, which will shorten the operating cycle of the reverse osmosis membrane and shorten the life of the membrane. , the cost will increase, and in severe cases, it will also lead to the scrapping and replacement of the reverse osmosis membrane, which will increase the cost

[0003] In order to protect the reverse osmosis system, many enterprises have added pretreatment units at the water source, generally including flocculation, sterilization, filtration and other processes; but due to the control of groundwater use, enterprises generally use surface water, and even enterprises in some regions have to use Reclaimed water is used as the feed water of the reverse osmosis desalination system. These water sources have complex components, high content of metal ions, organic matter, and microorganisms, and the water quality fluctuates greatly. The pretreatment cannot meet the feed water requirements of the reverse osmosis system, resulting in rapid fouling of the reverse osmosis membrane.

[0004] Most of the antiscalants for reverse osmosis membranes only have antiscaling effect, single function, applicable to narrow water quality conditions, do not have the functions of dispersion, sterilization, stripping, etc., and cannot meet the safe operation of the reverse osmosis system