Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent

A technology of brackish water desalination and reverse osmosis membrane, which is applied in the field of chemical products, can solve the problems of affecting normal use, reducing the probability of scaling, fouling and fouling of membrane elements, etc., and achieves strong dispersion, obvious effect, and easy biodegradation Effect

Active Publication Date: 2014-09-17
SHANDONG HUANGSANJIAO ENVIRONMENTAL PROTECTION TECH IND PARK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In actual operation, while the water molecules in the raw water are pushed to the other side of the membrane to become clean water, the large increase in salt content on the concentrated water side can easily cause scaling and fouling of the membrane elements, affecting normal use.
In order to solve this problem, the current common method is to add chemical antiscalants, and change the state of scale-forming ions in the water through chemical substances, so that the probability of scale formation is greatly reduced

Method used

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  • Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent
  • Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent
  • Anti-scaling agent special for seawater and brackish water desalination reverse osmosis membrane and preparation method of anti-scaling agent

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Experimental program
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Effect test

Embodiment 1

[0027] First add a mixture of 200kg acrylic acid and 300kg 2-acrylamide-2-methylpropanesulfonic acid 50% aqueous solution into titration tank 1, add 100kg ammonium persulfate 20% aqueous solution into titration tank 2, and then add 350kg deionized Water, add 40kg of sodium hypophosphite under stirring, heat to 87°C and drop the materials in two high-level tanks (Titration Tank 1 and Titration Tank 2) at the same time, control the temperature at 90-93°C, finish adding at the same time, cool down to 85°C, Slowly add 10kg of solid ammonium persulfate, then raise the temperature to 93-95°C, keep it warm for 2 hours, and finally lower the temperature below 40°C, open the discharge valve, filter the above liquid medicine into the packaging barrel to obtain the seawater and brackish water desalination reaction of the present invention. Special antiscalant for permeable membrane.

[0028] Experiments were carried out under the following conditions of brackish water quality: pH8.24, co...

Embodiment 2

[0036] First, a mixture of 220kg of acrylic acid and 350kg of 2-acrylamide-2-methylpropanesulfonic acid 40% aqueous solution was added to titration tank 1, 150kg of ammonium persulfate 25% aqueous solution was added to titration tank 2, and then 225kg of deionized water was added to the reaction kettle , add 40kg of sodium hypophosphite under stirring, heat to 87°C and add the materials in two high-level tanks dropwise at the same time, control the temperature at 90-93°C, finish adding at the same time, cool down to 85°C, slowly add 15kg of solid ammonium persulfate and then heat up 93-95 ℃, keep warm for 2.5 hours, finally lower the temperature below 40 ℃, open the discharge valve, filter the above liquid medicine and put it into a packaging barrel to obtain the special antiscalant for seawater and brackish water desalination reverse osmosis membrane of the present invention.

[0037] Experiments were carried out under the following water quality conditions in the Bohai Sea: p...

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Abstract

The invention provides an anti-scaling agent special for a seawater and brackish water desalination reverse osmosis membrane and a preparation method of the anti-scaling agent. The anti-scaling agent mainly comprises sodium hypophosphite, acyclic acid, 2-acrylamide-2-methylpro panesulfonic acid, ammonium persulfate and deionized water in a chemical combination manner; the anti-scaling agent is applied to a reverse osmosis system, is a water treatment medicament used for solving the scaling of the reverse osmosis membrane in the seawater and brackish water desalination process and has the high-effective chelation and dispersion effects, so that the scaling of various ions can be effectively prevented. The anti-scaling agent contains amide groups, and the amide groups are the same with functional groups of a reverse osmosis membrane element, can be compatible with the reverse osmosis membrane element and has the synergism effect. The anti-scaling agent can be compatible with other medicaments, such as a flocculating agent-aluminium polychlorid, and a reducing agent-sodium hydrogen sulfite, which are frequently used in the reverse osmosis system, and can not influence the use of the other medicaments; and the anti-scaling agent has the obvious effect on the preventing of the scaling of barium sulfate, strontium sulfate and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical products, and in particular relates to a special scale inhibitor for treating seawater and brackish water desalination reverse osmosis membrane and a preparation process thereof. Background technique [0002] Reverse osmosis technology is the most advanced and most energy-saving and effective membrane separation technology today. The principle is to apply a pressure greater than the natural osmotic pressure in salty water, so that the osmosis proceeds in the opposite direction, and the water molecules in the raw water are pressed to the other side of the membrane to become clean water, thereby achieving the removal of water. Therefore, it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in water, and the removal rate is as high as 97%-98%. [0003] The reverse osmosis device mainly separates the range of ions in the solution. It does not require heating, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F5/12C02F1/44
CPCY02A20/131
Inventor 李秀宁
Owner SHANDONG HUANGSANJIAO ENVIRONMENTAL PROTECTION TECH IND PARK CO LTD
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