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Evaluation method for reverse osmosis scale inhibition performance by judging silicon resistance of water treatment agents

A technology of water treatment agent and evaluation method, applied in water/sewage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the problems of not exceeding 45 degrees Celsius, inapplicability, membrane damage, etc.

Inactive Publication Date: 2019-12-06
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] In the prior art, there are few methods for evaluating the effect of scale inhibitors on silica scale inhibition. Generally, sodium silicate added with scale inhibitors is used in a water bath above 40 degrees Celsius, and then filtered to test the residual concentration of silica to determine Judging the antiscaling effect of the antiscalant on silica, or above 50 degrees Celsius, mixing sodium silicate and calcium chloride to generate calcium silicate to test the antiscaling effect of the water treatment agent, but the maximum allowable value of the reverse osmosis system The temperature does not exceed 45 degrees Celsius, beyond which irreversible damage to the membrane will occur
Therefore, this method is not suitable for the evaluation of scale inhibitors in reverse osmosis systems

Method used

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Embodiment Construction

[0028] Reagent preparation:

[0029] 1. Hydrochloric acid solution: 0.3±0.05mol / L, use hydrochloric acid: water = 1:1.

[0030] 2 sodium silicate solution (Na 2 SiO 3 9H 2 O) standard solution: 0.016mol / L.

[0031] 3 calcium carbonate solution (CaCO 3 ) standard solution: 0.024mol / L.

[0032] 4 Sodium hydroxide solution (NaOH): 0.4mol / L.

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Abstract

The invention provides an evaluation method for reverse osmosis scale inhibition performance by judging silicon resistance of water treatment agents. The evaluation method is characterized in that various water treatment agents are added into standard test solutions respectively, the mass concentration of soluble silicon dioxide in each test solution is sampled and measured after same test conditions, and the scale inhibition performance theta of each water treatment agent is calculated according to the measured value of the soluble silicon dioxide, so that the silicon resistance capacity of each water treatment agent is judged.

Description

technical field [0001] The invention belongs to the field of evaluation and evaluation of water treatment agents, and in particular relates to an evaluation method for judging the reverse osmosis and scale inhibition performance of water treatment agents against silicon. Background technique [0002] In the prior art, there are few methods for evaluating the effect of scale inhibitors on silica scale inhibition. Generally, sodium silicate added with scale inhibitors is used in a water bath above 40 degrees Celsius, and then filtered to test the residual concentration of silica to determine Judging the antiscaling effect of the antiscalant on silica, or above 50 degrees Celsius, mixing sodium silicate and calcium chloride to generate calcium silicate to test the antiscaling effect of the water treatment agent, but the maximum allowable value of the reverse osmosis system The temperature does not exceed 45 degrees Celsius, beyond which irreversible damage to the membrane will ...

Claims

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Application Information

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IPC IPC(8): G01N9/36C02F1/44
CPCC02F1/441C02F2303/22G01N9/36
Inventor 张金山夏志先
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH