Environmentally friendly phosphorus-free scale inhibitor for seawater desalination reverse osmosis membranes, and preparation method thereof

Abstract

The invention belongs to the field of water treatment, and particularly relates to an environmentally friendly phosphorus-free scale inhibitor for seawater desalination reverse osmosis membranes, and a preparation method thereof, wherein the environmentally friendly phosphorus-free scale inhibitor comprises, by weight, 20-30% of a maleic acid-acrylic acid copolymer, 40-60% of polyepoxysuccinic acid, 10-30% of an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 1-5% of citric acid, 0.5-1% of a surfactant, and the balance of deionized water. According to the present invention, the environmentally friendly phosphorus-free scale inhibitor is especially suitable for the seawater desalination reverse osmosis system, can effectively solve the membrane pollution problem caused by the deposition of CaCO3, CaSO4, BaSO4, SrSO4, iron oxide and silicon scale on the reverse osmosis membrane, can prevent the membrane scale from fouling, can prevent the reverse osmosis membrane from pollution and clogging, can improve the working efficiency of the reverse osmosis system, can prolong the service life of the reverse osmosis membrane, does not contain phosphorus, can discharge the pollution-free concentrated water, and is the environmentally friendly water treatment agent.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a green phosphorus-free scale inhibitor for seawater desalination reverse osmosis membranes and a preparation method thereof. Background technique [0002] With the development of our country's economy, human beings' demand for water resources continues to increase, coupled with the unreasonable exploitation and utilization of water resources, many cities are facing serious water crises. my country is a country with severe shortage of water resources, especially in the northern coastal areas, where fresh water resources are short and seawater resources are abundant. [0003] Seawater desalination technology has become an important technology to solve the shortage of water resources. In the practical application of reverse osmosis membrane, the problem of touch pollution is the decisive factor affecting the reliability of the technology. During the working process of th...

AI Technical Summary

Problems solved by technology

In the actual application of reverse osmosis membrane, the problem of touch pollution is the decisive factor affecting the reliability of the technology. During the working process of the membrane, the particles, colloidal particles or solute macromolecules in the water are destroyed due to the physical and chemical effects or mechanical effects of the membrane. Adsorption and precipitation on the surface of the membrane or in the pores of the membrane, resulting in a smaller or clogged membrane pore size, which reduces the performance of the membrane

[0004] During the membrane treatment process, due to the continuous concentration of raw water, it is easy to generate CaCO on the membrane surface. 3 , Ca 3 (PO 4 ) 2 , CaSO 4 , BaSO 4 , SrSO 4 , CaF 2 , metal oxides, silicic acid compounds, organic matter and other deposits, which affect the normal operation of the membrane device