Reverse-osmosis scale inhibitor

A scale inhibitor and reverse osmosis technology, applied in the field of scale inhibitors, can solve the problems of affecting the scale inhibition effect of the scale inhibitor, affecting the stability of the scale inhibitor effect and the like

Active Publication Date: 2017-01-04
湖北兴发环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the change of salinity will affect the scale inhibition effect of the scale inhibitor, thus affecting the stability of the scale inhibition effect of the scale inhibitor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]

[0022] The reverse osmosis antiscalant includes: one of aminotrimethylene phosphonic acid (ATMP), phosphonocarboxylic acid (POCA), polyaspartic acid (PASP), polyamino polyether methylene phosphonic acid (PAPEMP) or several. The addition amount of each component is as follows:

[0023] ATMP: 15Kg

[0024] POCA: 5Kg

[0025] PASP: 5Kg

[0026] PAPEMP: 10Kg

[0027] Deionized water: 65Kg

[0028] The production method of the reverse osmosis antiscalant involved in the present invention is: first add 30 parts of deionized water, then add polyamino polyether group methylene phosphonic acid (PAPEMP), aminotrimethylene phosphonic acid (ATMP), phosphonocarboxylic acid (POCA), polyaspartic acid (PASP) and the remaining deionized water in a stirring tank, start the stirring rod, stir for about 60 minutes, and put it into a barrel through a filter device after standing for more than ten minutes.

[0029] The use method of reverse osmosis scale inhibitor is continuous do...

Embodiment 2

[0031]

[0032] The reverse osmosis antiscalant includes: one of amino trimethylene phosphonic acid (ATMP), polyamino polyether methylene phosphonic acid (PAPEMP), phosphonocarboxylic acid (POCA) and polyaspartic acid (PASP) or several. The addition amount of each component is as follows:

[0033] ATMP: 25Kg

[0034] POCA: 2.5Kg

[0035] PASP: 2.5Kg

[0036] PAPEMP: 5Kg

[0037] Deionized water: 75Kg

[0038] The use method of reverse osmosis antiscalant is continuous dosing. It is diluted and evenly added to the water containing iron hydroxide and aluminum hydroxide by the dosing pump. The general use concentration is 3-6ppm. It has been used on site for five years. The flow rate of water, working pressure, inter-stage pressure, and conductance of produced water all remained stable without obvious fluctuations.

Embodiment 3

[0040]

[0041] The reverse osmosis antiscalant includes: one of aminotrimethylene phosphonic acid (ATMP), phosphonocarboxylic acid (POCA), polyaspartic acid (PASP), polyamino polyether methylene phosphonic acid (PAPEMP) or several. The addition amount of each component is as follows:

[0042] ATMP: 20Kg

[0043] POCA: 7.5Kg

[0044] PAPEMP: 10Kg

[0045] Deionized water: 65Kg

[0046] The use method of reverse osmosis antiscalant is continuous dosing. It is diluted and evenly added to the water body containing calcium sulfate and barium sulfate by the dosing pump. The general use concentration is 4-8ppm. The flow rate, working pressure, inter-stage pressure, and product water conductance all remain stable without obvious fluctuations.

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Abstract

The invention mainly relates to a reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range. The inhibitor has the good scale inhibition effect within the wide ionic strength range, and is prepared from one or more of amino trimethylene phosphonic acid (ATMP), phosphono-carboxylic acid (POCA), polyaspartic acid (PASP) and polyamino polyether methylene phosphonate (PAPEMP); by means of the reverse-osmosis and ultra-filtration scale inhibitor, membrane face scaling can be effectively prevented, fouling of a membrane is prevented, and the service life of a membrane system is prolonged. The working pressure and the water production efficiency of the membrane system are kept, and it is prevented that due to fouling, energy consumption of the system is increased. According to the reverse-osmosis and ultra-filtration scale inhibitor with the wide suitable salinity range, the reverse-osmosis scale inhibitor can be suitable for the wide water-quality salinity range (electric conductance is 0 microsecond to 30,000 microseconds) through compounding, and the using effect of the reverse-osmosis inhibitor can be guaranteed within the range.

Description

technical field [0001] The invention belongs to a scale inhibitor, which is mainly used for scale inhibition of nanofiltration and reverse osmosis systems, and can also be used for scale inhibition of liquids in other systems. Background technique [0002] Membrane technology is widely used in the desalination and purification process of water bodies today. During continuous operation, the accumulation of pollutants such as particles, colloids, and insoluble salts on the membrane surface will affect the operation of the membrane system. It will affect the water production rate and water quality of the system, and change the working pressure of the system. At the same time, long-term operation under the condition of fouling will greatly reduce the service life of the membrane. [0003] Solid particles, silt, bacteria, etc. that cause pollution of nanofiltration and reverse osmosis membrane systems need to be resolved through a pretreatment system, and these pollutants can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F5/14
CPCB01D65/08B01D2321/162C02F5/14C02F2303/14
Inventor 刘舜袁木平李永刚杨超龙刘超宇胡柏周凡马宏相谢盛燕王薇屠宏飞
Owner 湖北兴发环保科技有限公司
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