Online monitoring system for detecting hydrazine nitrate and hydroxylamine nitrate simultaneously

A technology of hydroxylamine nitrate and a monitoring system, which is applied to measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems such as complicated operation, less research data, and large detection method errors, and achieve simple analysis process and measurement accuracy high effect

Active Publication Date: 2019-06-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

At present, the pilot plant uses a combination of multiple methods for the determination of hydrazine nitrate and hydroxylamine nitrate, which is complicated, labor-intensive and time-consuming
By searching the method for simultaneous determination of hydrazine nitrate and hydroxylammonium nitrate, it is found that there are very few research materials in this area. Only Wang Ling and Li Dingming from the Institute of Radiation Chemistry have published "Near Infrared Spectroscopy for Rapid Determination of Hydrazine Nitrate and Hydroxylamine Nitrate in Aqueous Solution". "Content" proposed to use near-infrared spectroscopy to simultaneously determine the content of hydroxylamine nitrate and hydrazine nitrate, but when this method detects 0.2-0.9mol / L of hydrazine nitrate and hydroxylamine nitrate, the relative error of the test results is greater than 2.44%, and the maximum relative error can reach 9.54%
In 2012, China Institute of Atomic Energy also proposed in CN 102788765 A to simultaneously measure the content of hydroxylamine nitrate and hydrazine nitrate by infrared spectroscopy, but the relative error of the detection method is large

Method used

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  • Online monitoring system for detecting hydrazine nitrate and hydroxylamine nitrate simultaneously
  • Online monitoring system for detecting hydrazine nitrate and hydroxylamine nitrate simultaneously
  • Online monitoring system for detecting hydrazine nitrate and hydroxylamine nitrate simultaneously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The online monitoring system for simultaneous detection of hydrazine nitrate and hydroxylamine nitrate includes a solution extraction system, a potentiometric titration system and a system control center. The system control center connects and controls the solution extraction system and potentiometric titration system, and the solution extraction system and potentiometric titration system feed back the experimental operation results to the system control center.

[0028] The solution extraction system comprises a solution extractor (1); a first electromagnetic valve (2), a second electromagnetic valve (3), and a deionized water storage container (4). The liquid to be tested is delivered to the solution extractor (1) through the first electromagnetic valve (2), and the solution extractor quantitatively transports the solution to be tested to the titration tank (6). The second solenoid valve (3) is connected to the solution extractor (1) and the deionized water storage co...

Embodiment 2

[0035] Using the system in Example 1, compare the experimental data of the system with the traditional detection method to verify the reliability of the system.

[0036] (1) The system is compared with the test data of hydroxylamine nitrate determined by acid-base titration.

[0037] The comparison between the system and the volumetric method to determine the test data of hydrazine nitrate

[0038]Acid-base titration and volumetric method are recognized detection methods for measuring hydroxylamine nitrate and hydrazine nitrate, respectively. The test data of the system and the two methods under the same conditions were compared respectively, and the results are shown in Table 1 and Table 2.

[0039] Table 1 Comparison of online monitoring system and acid-base titration test data for determination of hydroxylamine nitrate

[0040]

[0041] Table 2 Comparison of test data between online monitoring system and volumetric method for determination of hydrazine nitrate

[0042...

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Abstract

The invention relates to an online monitoring system for detecting hydrazine nitrate and hydroxylamine nitrate simultaneously, and belongs to the technical field of nuclear fuel post-treatment. The online monitoring system comprises a solution extraction system, a potential titration system and a system control center, and uses a standard sodium hydroxide solution to determine the hydrazine nitrate and hydroxylamine nitrate simultaneously, and when a detection result is beyond the detection range of (0.05-0.5)mol / L, the system samples the liquid to be tested in a multiplication or dilution way. Thus, the relative measurement error for concentration determination of hydrazine nitrate and hydroxylamine nitrate is lower than 1%, operation is simple, and the average consumption time of a sample is 60-100s. Compared with a present determination method, the system is characterized by high precision, short time, and simultaneous detection for the contents of hydrazine nitrate and hydroxylamine nitrate.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel reprocessing, and in particular relates to an online monitoring system for simultaneously detecting hydrazine nitrate and hydroxylamine nitrate. Background technique [0002] Purex Process is a water reprocessing process for nuclear fuel, a chemical process that recovers uranium and plutonium from irradiated nuclear fuel by tributyl phosphate extraction. In the second cycle of the Purex Process, the hydrazine nitrate-hydroxylamine nitrate system is usually used to reduce plutonium from tetravalent to trivalent, so as to achieve the purpose of purifying and enriching plutonium. However, if the aqueous phase of hydrazine nitrate is excessive, a large amount of azide acid will be produced, which may cause an explosion. At the same time, Purex Process will produce a large amount of wastewater, which contains a certain amount of hydrazine nitrate and hydroxylamine nitrate, and the wastewater need...

Claims

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Application Information

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IPC IPC(8): G01N27/416
Inventor 邹展赵许群史海王杰张旭王晓东张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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