Measuring device and measuring method of oxygen solubility under high-pressure conditions

Abstract

The invention relates to a measuring device and a measuring method of oxygen solubility under high-pressure conditions. A sampling kettle is connected with the bottom of a high-pressure reaction kettle through a second air inlet pipe and a water inlet pipe. A stirrer is arranged outside the top of the high-pressure reaction kettle, and a transmission shaft of the stirrer penetrates through the top of the high-pressure reaction kettle to be inserted at the central position of the high-pressure reaction kettle. A heating sleeve is wrapped in the middle of the high-pressure reaction kettle and connected with one end of a temperature control instrument, and the other end of the temperature control instrument is connected with a temperature measuring instrument. A pressure gauge is arranged at the top of the high-pressure reaction kettle, and a high-pressure oxygen cylinder is connected to the top of the high-pressure reaction kettle through a first control valve and a first air inlet pipe. By means of the measuring device and the measuring method, accurate solubility of oxygen in the water under the high-pressure conditions can be measured, and theoretical direction and technical support can be provided for scientific research, industry, agriculture, aquaculture, waste water biochemical treatment, self-purification of water and reduction of influences of dissolved oxygen oversaturation on fishes.

Description

technical field [0001] The invention relates to a gas solubility measurement technology, in particular to a measurement method and a measurement device for the relationship between oxygen solubility and pressure under high pressure conditions, and belongs to the technical field of dissolved gas supersaturation in water conservancy projects. Background technique [0002] In many large-scale water conservancy projects in my country, according to their water volume dispatching requirements, water conservancy projects need to discharge water to downstream rivers through spillways, flood discharge tunnels and other discharge structures. Because the pressure of the water flow in the pond or river is much higher than the atmospheric pressure, reaching several or even more than ten atmospheres, and the water flow will be accompanied by a large amount of aeration when the dam discharges water, so this large flow and strong aeration flow is in the atmosphere. Dissolved oxygen supersat...

AI Technical Summary

Problems solved by technology

The above two methods are dissolved oxygen measurement methods under normal pressure conditions, and cannot complete the measurement of oxygen solubility under high pressure conditions.

This is because if the water body that has reached the dissolution equilibrium under high pressure is reduced to normal pressure and then the chemical iodometric method or the membrane electrode method of the dissolved oxygen meter is used to measure the solubility of oxygen, there will be a problem of dissolved oxygen release due to a sudden decrease in pressure. Seriously affect the measurement accuracy

Therefore, in order to ensure the measurement accuracy, it is necessary to complete the measurement of oxygen solubility under the high pressure condition of the high-pressure reactor. However, due to the limited space of the reactor, the dissolved oxygen meter may collide with the agitator when placed in the reactor. The oxygen meter is damaged. In addition, the dissolved oxygen meter is an instrument used under normal pressure conditions, and it will be damaged due to high pressure when placed in the reactor

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