Efficient non-phosphorus reverse osmosis scale-inhibiting dispersant

Abstract

An efficient non-phosphorus reverse osmosis film scale inhibitor is prepared by the following steps: 1) a pH adjuster, a sodium styrene sulfonate polymer, a carboxylic acid copolymer, an aldehyde, a sulfonic acid copolymer, a polyamino acid, dimethyldioctadecylammonium bromide and deionized water are added into a container at room temperature, and stirred to obtain a homogeneous and transparent solution; 2) gelatin is added, heated to temperature of 35 to 45 DEG C, and stirred evenly to obtain a transparent solution; 3) a gas pipe communicated with a high-pressure gas source is inserted into the solution, the gas outlet end of the gas pipe in the transparent solution is communicated with a plurality of capillaries, the ventilation volume per minute is 30-80L / L solution, amd stirring is performed while ventilation; 4) after the ventilation, the solution is dried at the temperature of 80 to 120 DEG C; and 5) after drying, a solidified solid scale inhibitor is crushed to a particle size range of 1 to 3 mm to obtain the efficient non-phosphorus reverse osmosis film scale inhibitor. The scale inhibitor can effectively, stably and continuously exert a scale inhibition effect.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a phosphorus-free reverse osmosis anti-scale dispersant. Background technique [0002] Desalination through key technologies such as membrane separation can turn sewage, waste water, salt water, sea water, etc. . [0003] Reverse osmosis (RO) desalination technology is widely used in various fields such as pure water preparation, power plant boiler feed water treatment, industrial wastewater treatment and drinking water treatment. Compared with the traditional desalination technology, reverse osmosis desalination technology has outstanding advantages such as simple system, convenient operation, small system footprint, low energy consumption, stable product water quality, no regeneration waste liquid discharge, and economical operating costs. Therefore, the application of reverse osmosis The field has been continuously expanded. In addition, with the development of membrane separ...

AI Technical Summary

Problems solved by technology

In the reverse osmosis desalination process, once fouling and scaling occur, the membrane flux and water production efficiency will be reduced, the water supply pressure will be increased, the membrane flux will be reduced, and eventually the membrane will be seriously damaged and the service life of the membrane will be reduced.

These contaminations will also increase the number of membrane cleanings, causing unplanned shutdowns and increasing operating costs

[0005] At present, most of the antiscalants used in the reverse osmosis system are organophosphorus composite antiscalants. Phosphorus is the nutrient source for bacteria and algae. The system internally provides the phosphorus-containing nutrients needed for the growth of bacteria and microorganisms, which leads to the hidden danger of biological pollution and bacteria exceeding the standard in the membrane system; on the other hand, phosphorus-containing scale inhibitors are easy to react with ions in the water, resulting Phosphate precipitation pollution is produced; the third is that the phosphorus contained in the water is discharged with the concentrated water, causing pollution to the environmental water source

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