Method for preparing reverse osmosis antisludging agent
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A scale inhibitor and reverse osmosis technology, applied in the field of industrial water supply treatment and advanced water treatment, can solve the problems of low scale inhibition rate and large performance difference, and achieve the effect of high scale inhibition efficiency
Inactive Publication Date: 2008-05-28
WUHAN UNIV OF TECH
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Problems solved by technology
[0004] At present, there are many kinds of reverse osmosis antiscalants in the market, and the product performance varies greatly, but most of them have the problem of low scale inhibition rate. The scale inhibition rate of existing reverse osmosis scale inhibitors is generally 60-80%.
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Embodiment 1
[0021] The method embodiment 1 of the present invention, its steps are:
[0022] (1) Add 50kg of melamine, 150kg of 40% hydrolyzed maleic anhydride, 150kg of ammonium chloride, and 150kg of formaldehyde into a container with a volume of 2000L, stir and dissolve, and react at 80±5°C for 0.5 hours;
[0023] (2) Add 150kg of urea, 150kg of ammonium chloride, and 150kg of formaldehyde, and react at 90±5°C for 2 hours;
[0024] (3) Add 150kg of 30% polyacrylic acid and 150kg of 2% cationic polyacrylamide, and react at 70±5°C for 0.5 hours;
[0025] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.
Embodiment 2
[0026] The method embodiment 2 of the present invention, its steps are:
[0027] (1) Add 50kg of melamine, 100kg of 30% hydrolyzed maleic anhydride, 100kg of ammonium chloride, and 100kg of formaldehyde into a constant temperature reaction kettle with a volume of 2000L and a stirrer. After stirring and dissolving, react at 80±5°C for 1 hour ;
[0028] (2) Add 50kg of urea, 50kg of ammonium chloride, and 65kg of formaldehyde, and react for 3 hours at 90±5°C;
[0029] (3) Add 50kg of 15% polyacrylic acid and 60kg of 0.5% cationic polyacrylamide, and react for 0.5 hours at 70±5°C;
[0030] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.
Embodiment 3
[0031] Embodiment 3 of the inventive method, its steps are:
[0032] (1) Add 50kg of melamine, 50kg of 40% hydrolyzed maleic anhydride, 50kg of ammonium chloride, and 50kg of formaldehyde into a container with a volume of 2000L, stir and dissolve, and react at 80±5°C for 2 hours;
[0033] (2) Add 50kg of urea, 50kg of ammonium chloride, and 50kg of formaldehyde, and react at 90±5°C for 4 hours;
[0034] (3) Add 50kg of 30% polyacrylic acid and 50kg of 2% cationic polyacrylamide, and react for 1 hour at 70±5°C;
[0035] (4) After cooling to room temperature, the multi-component polymeric reverse osmosis scale inhibitor can be prepared.
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scale inhibition rate
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Abstract
The invention relates to a preparation method of reverse osmosis scale inhibitor and comprises the steps that: (1) 1 portion of tricyanamide, 1-3 portions of PHMA with a weight concentration ratio of 30-40 percent, 1-3 portions of ammonium chloride and 1-3 portions of formaldehyde are added into a container and react for 0.5-2 hours at the temperature of 80 plus / minus 5 DEG C after stirred and dissolved; (2) 1-3 portions of urea, 1-3 portions of ammonium chloride and 1-3 portions of formaldehyde are then added for reaction for 2-4 hours at the temperature of 90 plus / minus 5 DEG C; (3) 1-3 portions of polyacrylic acid with a weight concentration ratio of 15-30 percent and 1-3 portions of cationic polyacrylamide with a weight concentration ratio of 0.5-2 percent are next added for reaction for 0.5-1 hour at the temperature of 70 plus / minus 5 DEG C; (4) the mixture obtained is then cooled to the room temperature to get finished products. In addition, the portion of the raw materials means the weight portion. The reverse osmosis scale inhibitor prepared by the method of the invention is multi-polymeric copolymer which is particularly applicable to the water quality with metallic oxides, silicon and high content of scale salts and has high scale inhibiting efficiency(with the scale inhibiting rate above 95 percent ) as well as produces no immiscible polymer through coagulation with residual flocculant or silicon compounds of rich aluminum and iron.
Description
technical field [0001] The invention relates to the technical field of industrial water supply treatment and advanced water treatment, in particular to a reverse osmosis scale inhibitor, in particular to a preparation method of the reverse osmosis scale inhibitor. Background technique [0002] With the continuous expansion of urbanization in our country, the industrial level continues to deepen. There are certain restrictions on the use of groundwater as industrial water, so most of the boiler water in modern thermal power plants should be treated with surface water. In order to ensure the quality of boiler water, modern thermal power plants and other enterprises widely adopt reverse osmosis technology and establish water treatment systems. [0003] Long-term operation of reverse osmosis equipment will cause a large amount of dirt to precipitate, resulting in fouling. The appearance of fouling will directly cause a large amount of energy consumption and frequent cleaning, ...
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