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Method for testing influence of water treatment agent on membrane system operation

A technology for water treatment and membrane systems, which is used in measurement devices, analysis of suspensions and porous materials, and scientific instruments. intuitive effect

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The partial circulation method of permeate mentioned in Chinese patent 200710036342.9 is to return all the reverse osmosis concentrated liquid to the original water tank for circulation, and at the same time return part of the reverse osmosis permeate to the original water tank for circulation and discharge the rest. The method simulates the concentration of reverse osmosis equipment, but the concentration ratio is not as large as that of partial circulation
[0007] Since water treatment chemicals have a certain impact on the membrane system, the current evaluation method for the impact of water treatment chemicals on the operation of the membrane system remains to be studied

Method used

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  • Method for testing influence of water treatment agent on membrane system operation
  • Method for testing influence of water treatment agent on membrane system operation
  • Method for testing influence of water treatment agent on membrane system operation

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Experimental program
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Effect test

Embodiment 1

[0031] The membrane system includes: water inlet tank, membrane unit, water inlet pipeline, product water return pipeline, product water discharge pipeline, concentrated water return pipeline:

[0032] Dissolve 1g of corrosion and scale inhibitor (mainly composed of sulfonic acid copolymer, PBTCA) water treatment agent in 20L of deionized water solution, stir evenly, and add it to the inlet of the membrane system (CSM RE-1812-50 reverse osmosis membrane) In the water tank, open the membrane system, drain the product water of the membrane system, and return the concentrated water to the water inlet tank. Return to the water inlet tank to measure the water production of the membrane system, and take samples to analyze and measure the concentration of corrosion and scale inhibitors in the aqueous solution in the water inlet tank, and determine the amount of the agent by measuring the amount of total phosphorus and acrylic acid polymer. The concentration basically did not change e...

Embodiment 2

[0034] Dissolve 10g of bactericide (a compound agent, the main component is polyquaternary ammonium salt) water treatment agent in 400L of aqueous solution, stir evenly, and add it to the water inlet tank of the membrane system (BW30-2540 reverse osmosis membrane), Open the membrane system, drain the product water of the membrane system, and return the concentrated water to the water inlet tank. When the discharged water product is 75% of the influent water, return all the product water and concentrated water of the membrane system to the water inlet In the tank, take a sample to analyze and measure the concentration of the fungicide in the aqueous solution in the water inlet tank after concentration. If the fungicide has no effect on the operation of the membrane system, the concentration of the fungicide in the water inlet tank after concentration should be 100mg / L. The actual measurement The value is 90mg / L, and the dose has decreased by 10%, so it is judged that the compoun...

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Abstract

The invention provides a method for evaluating the influence of water treatment agent on membrane system operation, wherein all the produced water in the membrane system is drained at first, all the concentrated water back flows, the drained produced water is 50 to 90 % of the original water amount, then all the produced water and concentrated water back flow, and therefore the influence of the water treatment agent on membrane system operation is evaluated through determining and comparing the concentrations of the water treatment agent in an inlet water tank and the water yields of a membrane unit at different times.

Description

technical field [0001] The invention relates to a test method for membranes in wastewater treatment process, in particular to a test method for the influence of water treatment chemicals on the operation of membrane systems. Background technique [0002] Membrane separation technology represented by polymer membrane, as a fluid separation unit operation technology, has achieved remarkable development in the past 30 years. At present, membrane technology is widely used in seawater desalination, brackish water desalination, pure water and In addition to high-purity water production, it is also used in various industrial wastewater treatment and reuse fields. [0003] Membrane fouling is the biggest restrictive factor in the application of membrane technology. It not only increases the operating cost, shortens the service life of the membrane, but also directly affects the efficient and continuous operation of the membrane. Therefore, solving the problem of membrane fouling is...

Claims

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Application Information

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IPC IPC(8): G01N15/08
Inventor 平春霞栾金义张英雄邢琳范丽辉曹宗仑
Owner CHINA PETROLEUM & CHEM CORP
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