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A device and method for laboratory simple and precise deoxygenation

A laboratory and precise technology, applied in the direction of degassed water/sewage treatment, etc., can solve the problem of high dissolved oxygen in the deoxidized solution, and achieve the effect of avoiding large-scale use

Inactive Publication Date: 2019-12-13
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device and method overcomes the problems that a large amount of high-purity nitrogen gas is consumed in the preparation of anaerobic solution in the laboratory, and the dissolved oxygen content of the deoxygenated solution is relatively high.

Method used

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  • A device and method for laboratory simple and precise deoxygenation
  • A device and method for laboratory simple and precise deoxygenation
  • A device and method for laboratory simple and precise deoxygenation

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the specific connection method of a simple and accurate deoxygenation device in the laboratory is as follows: select high-temperature resistant silicone tube 21 to connect vacuum pump 1, deoxygenation water tank 19, circulating water cooler 4, diaphragm type circulating water pump 6, deoxygenation water storage Device 16, nitrogen cylinder 15, and each connecting nozzle is fastened with a pipe collar. A water-stop clamp 2 is installed on the silicone tube between the vacuum pump and the deaeration water tank to prevent sucking back when the vacuum pump is turned off and to ensure the airtightness of the device. Screw water-stop clamps 5 and 7 are respectively arranged on the front and rear silicone pipelines of the diaphragm type circulating water pump to control the start and stop of the water pump and adjust the flow rate.

[0026] In this embodiment, the top of the deoxygenated water tank 19 is provided with a water injection port 3 and a ...

Embodiment 2

[0039] In this example, a deaeration experiment was carried out on 3L of high-purity water according to the simple and accurate deaeration method in the laboratory in Example 1. During the vacuum thermal deaeration process, the temperature of the oil bath was set at 100°C, and the pressure of the deaerator was maintained at -0.08MPa (gauge pressure) or so. The relationship between the amount of dissolved oxygen and the heating time was investigated through experiments, and figure 2 The relationship between dissolved oxygen and heating time at 100°C.

[0040]In this example, a deoxygenation experiment was carried out on 3L of high-purity water according to the method of simple and accurate deoxygenation in the laboratory in Example 1. During the vacuum thermal deoxygenation process, the oil bath temperature was set to 90, 100, 110, 120, 130, 140, 150°C, the pressure of the deaerator is maintained at about -0.08MPa (gauge pressure), and the vacuum thermal deoxygenation time i...

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Abstract

The invention discloses a simple and accurate deoxygenation device in the laboratory, which includes a vacuum pump, a deoxygenation water tank heated by an oil bath, a circulating water cooler, a diaphragm type circulating water pump, and a deoxygenation water storage device with a dissolved oxygen probe. Components are connected sequentially via pipes. A nitrogen cylinder is connected to the deoxygenation water storage, and the control of the dissolved oxygen amount is further ensured by passing through nitrogen to remove oxygen. The results of laboratory experiments show that the actual oxygen removal effect of the equipment is good, and the dissolved oxygen in the aqueous solution can be stably controlled within the range of 0~5ppb. The invention also discloses a method for accurately removing oxygen in a laboratory. Its advantage is that it can quickly and easily achieve accurate oxygen removal under laboratory conditions, which solves the problem that the laboratory cannot produce a large amount of anaerobic and low-oxygen water.

Description

technical field [0001] This patent relates to laboratory equipment technology, specifically a device and method for convenient and accurate oxygen removal in the laboratory. Background technique [0002] In chemical experiments, a large amount of anaerobic water or anaerobic solution is often required, especially in metal corrosion experiments, microbiological experiments, and chemical synthesis experiments. The requirements for the concentration of dissolved oxygen in the solution are high, and the reaction system must ensure a low-oxygen or anaerobic environment. is very necessary. At present, the method of removing oxygen in the laboratory is mainly to remove oxygen by passing nitrogen or adding Na 2 SO 3 and other reducing agents for chemical oxygen removal. When nitrogen is used to remove oxygen, the amount of inert gas is required, and the amount of dissolved oxygen in the solution is affected by various factors such as the volume of the solution, the flow rate of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/20
CPCC02F1/20
Inventor 朱志平乔越喻强姜雄峰
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY