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A method for evaluating the performance of iron ion dispersant in circulating water

An evaluation method and dispersion performance technology, applied in the use of chemical indicators for analysis, etc., can solve problems such as coprecipitation, increased turbidity of circulating cooling water system, and hazards of circulating cooling water system

Active Publication Date: 2017-11-28
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when there is a certain amount of corrosion in the system, the higher the concentration ratio, the higher the iron ions in the system, especially now that many circulating cooling water systems use reclaimed water as the replenishment water of the circulating water system, and the iron ions in reclaimed water are generally higher. After multiple cycles and high concentration, iron ions are easily deposited in the circulating cooling water to produce a large amount of flocculent precipitation, and co-precipitate with other ions in the system, which brings many hazards to the circulating cooling water system, such as increasing The turbidity of the circulating cooling water system, causing system blockage, causing system pH fluctuations, etc., in order to stably disperse the iron ions in the circulating cooling water with high concentration ratio, it is necessary to add an iron ion dispersant to stabilize the iron ions in the system Dispersed in water without sedimentation, but there is no effective method for evaluating the performance of iron ion dispersants in China

Method used

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  • A method for evaluating the performance of iron ion dispersant in circulating water
  • A method for evaluating the performance of iron ion dispersant in circulating water
  • A method for evaluating the performance of iron ion dispersant in circulating water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Utilize the evaluation method of iron ion dispersant performance in a kind of circulating water of the present invention to evaluate laboratory water distribution and field water, concrete implementation steps are as follows:

[0036] (1) Preparation of experimental water

[0037] The experimental water adopts on-site water, which contains calcium ion content of 40mg / L, bicarbonate ion content of 84mg / L, iron ion content of 5mg / L, pH of 8.50, and the initial iron ion concentration of the experimental water y=5mg / L , the experimental water volume is 2.5L;

[0038] (2) Do field water blank test

[0039] The temperature of the experiment is 50°C. During the experiment, a constant temperature water bath is used to keep the temperature of the system constant. Take 2.5L of experimental water and put it in a 3.0L beaker. Place the beaker in a constant temperature water bath of 50°C. Excellent automatic water replenishment level sensing system, so that the experimental water ...

Embodiment 2

[0045] Utilize the evaluation method of iron ion dispersant performance in a kind of circulating water of the present invention to the evaluation of dispersant sun-2 under different temperatures, concrete implementation steps are as follows:

[0046] (1) Preparation of experimental water

[0047] The experimental water adopts distribution water, which contains 111mg / L of CaCl 2 , 116mg / L NaHCO 3 and 14.51mg / L of iron ions, using 2g / L of sodium hydroxide solution to adjust the pH value of the prepared experimental water to 8.50, the initial iron ion concentration y=5mg / L of the experimental water, and the volume of the experimental water is 2.5L;

[0048] (2) Do a blank test

[0049] The experimental temperature is 30°C, 40°C, 50°C, 60°C, and 70°C. During the experiment, a constant temperature water bath is used to keep the temperature of the system constant. Take 2.5L of prepared experimental water and place it in a 3.0L beaker, and place the beaker at 30 In the constant te...

Embodiment 3

[0055] Utilize the evaluation method of iron ion dispersant performance in a kind of circulating water of the present invention to the evaluation of dispersant sun-2 under different iron ion concentrations, concrete implementation steps are as follows:

[0056] (1) Preparation of experimental water

[0057] The experimental water is mixed water, which contains 111mg / L of CaCl 2 , 116mg / L NaHCO 3 , the ferric chloride content is respectively 2.90mg / L, 8.70mg / L, 14.51mg / L, 20.31mg / L, 26.12mg / L, adopts 2g / L sodium hydroxide solution to adjust the pH value of the prepared experimental water to 8.50, the initial iron ion concentration y of the experimental water is 1mg / L, 3mg / L, 5mg / L, 7mg / L, 9mg / L, and the experimental water volume is 2.5L;

[0058] (2) Do a blank test

[0059] The experimental temperature is 50°C. Take 2.5L of the prepared experimental water and place it in a 3.0L beaker, place the beaker in a constant temperature water bath at 50°C, turn on the constant speed...

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Abstract

The invention relates to a method for evaluating performance of an iron ion dispersing agent in circulating water. The method comprises the steps that a working condition of a circulating cooling water system is simulated through technologies such as constant temperature, bubbling and real-time moisturizing, in the evaluation process, the temperature of a system remains unchanged, the water volume of an initial experiment is fixed, a constant-speed bubbling device is started, the concentration of iron ions in an initial experiment water sample is determined, the dispersing agent to be evaluated is added to the experiment water sample, experiment water is taken out after bubbling is conducted for 5 hours at the constant temperature, standing is conducted for one hour, the concentration of the iron ions in an upper solution of the experiment water is determined, a blank experiment is conducted, and the dispersion rate of the iron ions of the experiment water before the experiment and the dispersion rate of the iron ions of the experiment water after the experiment are calculated according to a formula. According to the method for evaluating the performance of the iron ion dispersing agent in the circulating water, the performance of the iron ion dispersing agent can be evaluated simply, rapidly and effectively.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating water treatment, and in particular relates to a method suitable for performance evaluation of an iron ion dispersant in a circulating water system. Background technique [0002] my country is one of the countries lacking in water resources in the world. With the rapid development of the economy, the water consumption is increasing, and there are varying degrees of water shortages in many areas. Saving water is an important way to solve the water crisis. Industrial cooling water accounts for a considerable proportion of my country's industrial water, which is the focus of my country's current and future industrial water-saving work. Increase the concentration ratio of industrial cooling water, so that the concentration ratio of circulating cooling water in industrial enterprises in my country generally reaches more than 5 times , and gradually realize near-zero discharge will be an i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/22
CPCG01N31/22
Inventor 王会靳晓霞孙继侯洋赵迎秋
Owner CNOOC TIANJIN CHEM RES & DESIGN INST