Separation device and separation method for dissolved gas in water
A technology of dissolved gas and separation device, applied in the field of dissolved gas separation device in water, which can solve the problems of complex structure, long operation time and difficult processing of phase separator, and achieve the effect of simple system structure, easy operation and improved work efficiency
Active Publication Date: 2013-04-24
CHINA UNION ENG
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Problems solved by technology
The internal structure of the phase separator is complicated, the processing is difficult, and the equipment cost is high
During sampling, the separator in the phase separation device needs to be segregated twice, the operation time is long, the work efficiency is low, and it is not suitable for the requirements of the places where the collectors can only be exposed for a short time
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[0023] Now further illustrate the device and process implementation process of the present invention in conjunction with accompanying drawings.
[0024] The present invention is a device for separating dissolved gas in water based on Henry's law of gas, that is, a water sample with a certain temperature and pressure is fed with high-purity nitrogen to change the partial pressure of dissolved gas in the water sample, so that the gas dissolved in the water sample is separated. Come out, and reach gas-liquid equilibrium after sufficient flow contact, so as to obtain a gas phase sample at a certain pressure.
[0025] According to Henry's Law: At a certain temperature, the gas partial pressure of a solute in a dilute solution is proportional to the concentration of the solution. Therefore, the following formula can be used to calculate the gas concentration contained in the water sample at a certain temperature:
[0026] P B = ...
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The invention discloses a separation device for dissolved gas in water, and the separation device is characterized by comprising: a water-intake pipe, a pump inlet valve, a peristaltic pump, a pump outlet valve and a pump outlet pipe connecting in sequence; the pump outlet pipe is separately connected with a gas collection bottle with a stopper and a water sample collection bottle via a pipeline, and the gas collection bottle with the stopper is connected with a overflow tank through an overflow pipe; a first switching valve is arranged on the pipe connecting the pump outlet pipe and the gas collection bottle with the stopper; and a second switching valve is arranged on the pipe connecting the pump outlet pipe and the water sample collection bottle. The invention also discloses a dissolved gas separation method by using the separation device for dissolved gas. By adopting the above technical solution, the beneficial effects are as follows: in the whole process, connections are all obtained by using pipeline valves with good tightness, without the need of additional vacuum pumping devices; the whole process is precise and reliable, the system is simple in structure, easy to install and dismantle, and convenient and fast in operation, and the experimental data are not influenced by operating levels of a gas gatherer.
Description
technical field [0001] The invention relates to the field of gas separation, in particular to a separation device and separation method for dissolved gas in water. Background technique [0002] At present, the measurement of dissolved gas content in water is mainly carried out by two methods: online dissolved gas analysis method and laboratory gas chromatography analysis method. The advantages of online dissolved gas analyzers (such as online dissolved gas analyzers, online dissolved oxygen analyzers, etc.) are fast and convenient, but their disadvantages are low precision, single analysis items, and high equipment investment costs. The laboratory gas chromatography analysis method is to manually collect water samples, separate the gas dissolved in water, and then send them to the laboratory for gas chromatography analysis, so as to obtain the content of dissolved gases in the collected water samples. Its advantages are: high precision , Multiple items can be analyzed, but ...
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IPC IPC(8): G01N1/34G01N30/06
Inventor 张博黄安元
Owner CHINA UNION ENG