Device and method for detecting dissolved oxygen in water

A technology for solubility and detection of water, which is applied in chemical analysis by titration, material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., which can solve unfavorable on-site operation and comparison. Reading error, slow speed and other problems, to achieve the effect of strong resistance to water quality interference, reduce error, and easy to carry

Inactive Publication Date: 2017-09-08
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are three national standard methods for the determination of dissolved oxygen in water, which are iodometric method, internal electrolysis method and electrochemical probe method.
Although the oil field currently measures the content of dissolved oxygen in water by comparing the colorimetric tube with the standard color scale, this method is not ideal for comparing the color scale when the water quality is poor, and there are large errors in the comparison readings

Method used

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  • Device and method for detecting dissolved oxygen in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of manganese sulfate solution: weigh 480gMnSO 4 4H 2 O, dissolved in distilled water, filtered and diluted to 1L.

[0042] Prepare alkaline KI solution: weigh 500g NaOH and dissolve in 300-400mL distilled water, weigh 150g KI and dissolve in 200mL distilled water, after the NaOH solution is cooled, combine the two solutions, mix well, and dilute to 1L with distilled water.

[0043] Fill bottle A1 with prepared MnSO in advance 4 1.0ml mixed with 2.0ml of alkaline KI solution, then vacuum decompressed and sealed, and bottle B2 was filled with concentrated H2 SO 4 2.0ml mixed with 1.0ml of 1% starch, then sealed under vacuum pressure reduction, bottle C3 filled with 100.0ml of 0.1mol / L NaS 2 o 3 solution. The amount of reagents and medicines in bottle A1 and bottle B2 is sufficient to react with water samples. Bottle A1 and bottle B2 are vacuum. The volume of bottle A1, bottle B2 and bottle C is 100ml, and the lower end of each bottle is an open slender ...

Embodiment 2

[0052] For ease of use, the elongated tubes at the bottom of the bottle A1, the bottle B2 and the bottle C3 can be made closed, and the bottle A1 and the bottle B2 are vacuum. The elongated tube is a glass tube with a pipe diameter of about 0.1mm, and the connecting branch of the four-way connecting pipe 5 is a flexible pipe. The elongated pipe can be tightly inserted into the connecting branch end of the four-way connecting pipe 5 .

[0053] During the detection process, when a reaction is required, the closed glass tube at the lower end of the bottle is broken directly, and the water sample can flow through the glass tube under the action of the pressure difference.

Embodiment 3

[0055] The slender tubes at the bottom of bottle A1, bottle B2 and bottle C3 are closed, and the slender cross-sections of the tubes are sealed with tinfoil, and bottle A1 and bottle B2 are in a vacuum state. Correspondingly, a thorn-shaped protrusion is provided on the inner side of the connecting hose of the four-way connecting pipe 5 . The elongated pipe can be tightly inserted into the connecting branch end of the four-way connecting pipe 5 .

[0056] During the detection process, when a reaction is required, bend the hose, use the thorn-shaped protrusion inside the hose to pierce the foil seal, and break the vacuum state, so that the water sample can flow through the glass tube under the action of the pressure difference.

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Abstract

The invention discloses a device and method for detecting dissolved oxygen in water, comprising bottle A, bottle B, bottle C, water sample collection buffer barrel and four-way connecting pipe, characterized in that the bottle A and bottle B are vacuum state, bottle A, bottle B and bottle C are respectively connected to the top of the water sample collection buffer barrel through four-way connecting pipes, and the water sample collection buffer barrel is connected to the sampling port. By filling the test solution in advance and performing vacuum treatment, it is easy to carry and quickly detect on-site. It reduces the errors caused by man-made and experimental instruments during the operation, and can directly read the dosage and accurately calculate the dissolved oxygen content. Using the device and detection method to measure dissolved oxygen in water is convenient for on-site detection, simple to operate, accurate in reading, and has strong ability to resist water quality interference when detecting turbid water quality.

Description

technical field [0001] The invention relates to a detection device and method, in particular to a detection device and method for detecting dissolved oxygen in water. Background technique [0002] Equipment made of carbon steel such as tanks and pipelines is an important part of oilfield production and transportation. If dissolved oxygen is contained in tanks and pipelines in collection and transportation, treatment of mixed infusion, sewage, water injection and other media, the equipment will be corroded due to the depolarization of oxygen. And the corrosion rate increases sharply with the increase of dissolved oxygen concentration. Therefore, the measurement of dissolved oxygen in water in oilfield production is particularly important. [0003] At present, there are three national standard methods for the determination of dissolved oxygen in water, iodometric method, internal electrolysis method, and electrochemical probe method. Although the oilfield currently measures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/82
CPCG01N31/16G01N21/82
Inventor 何泽宇王志力冯电稳
Owner E TECH ENERGY TECH DEV CORP
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