Composite reverse osmosis scale inhibitor for reverse osmosis membrane

Abstract

The invention discloses a composite reverse osmosis scale inhibitor for a reverse osmosis membrane. The composite reverse osmosis scale inhibitor comprises the following components in percentage by weight: 15%-25% of disodium polyepoxysuccinicate (PESA), 7%-13% of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 1%-3% of hydroxyethylidene diphosphonic acid (HEDP), 7%-13% of polyacrylic acid (PAA) and the balance of deionized water. The components are mixed and stirred evenly to obtain the scale inhibitor; the scale inhibitor is excellent in scale inhibition property in the application process; and the phosphorus content in concentrated water discharge is lower than that of the national discharge standard.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a composite reverse osmosis scale inhibitor used for reverse osmosis membranes. Background technique [0002] Since the early 1960s, reverse osmosis membrane separation technology is still in the laboratory stage. Due to its advantages of low investment, low energy consumption, small footprint, short construction period, simple operation, easy automatic control, and fast start-up and operation , is developing at an astonishing speed, and has been widely promoted in our country by the mid-1980s. In recent years, it has gradually gained an advantage in water desalination methods, and has been widely used in domestic electric power, electronics, chemical, pharmaceutical, food and other industries. The current market demand is growing at an annual rate of about 18%. With the development of membrane separation technology, the application of reverse osmos...

AI Technical Summary

Problems solved by technology

Reverse osmosis membrane separation technology is one of the most mature physical desalination technologies in water treatment desalination process. At present, scaling is still one of the main problems affecting the normal operation of reverse osmosis technology in the development process. When there is scale deposition on the membrane surface, it is necessary to Stopping the equipment for chemical cleaning, or even replacing the membrane elements. In addition, most reverse osmosis antiscalants are still based on phosphorus, which will cause eutrophication of the water body after the concentrated water of the reverse osmosis device is discharged, which will endanger the environment.

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