A gas-liquid separator for gas monitoring in liquid
A gas-liquid separator and gas monitoring technology, applied in liquid degassing, separation methods, preparation of test samples, etc., can solve the problems of low representativeness of test data, difficulty in ensuring sample stability, etc., and achieve the number of sample transfers Less, saving transportation time, simple structure effect
Active Publication Date: 2020-08-25
朱燕超
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Problems solved by technology
After manual sampling, the main problem faced by the laboratory analysis is that the representativeness of the test data is not strong because the samples need to be transported long distances and it is difficult to ensure the stability of the samples.
The main problem in online monitoring is that there is no effective and accurate method to directly detect various volatile gases in liquids, so it is necessary to extract and separate volatile gases from liquids conveniently and efficiently, and then analyze them
Method used
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Embodiment Construction
[0033] The specific embodiment of the present invention will be described below in conjunction with accompanying drawing: figure 1 As shown, one or more gas-collecting pipes 1 with selective permeability to gas and impermeable to the liquid to be analyzed are installed on the two-way joint that runs through the concave surface 2 of the gas-collecting cavity; the gas-collecting tube of the gas-collecting cavity 3 One side of the cavity concave surface 2 is recessed inward for a certain distance, and the edge has an internal thread, forming a structure like a bottle cap; There is a small hole in the middle, and the inner diameter of the small hole is obviously smaller than the inner diameter of the cavity of the protruding part, so that the convex surface 4 of the air-collecting chamber around the small hole acts as a baffle, forming an air-collecting chamber baffle 5; The protruding part cavity outside the plate 5 is processed with an air-collecting chamber convex thread 7, and...
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The invention discloses a gas-liquid separator for monitoring gas in liquid and a use method of the gas-liquid separator. The gas-liquid separator can separate volatility gas analysis substances fromliquid samples by the aid of vacuum and membrane penetration principles, and the gas-liquid separator comprises a gas collecting tube, a gas collecting cavity, a gas storage cavity, a hollow needle head and a plug with a push rod, and the gas collecting tube comprises a macromolecular membrane which selectively ventilates and cannot permeate analysis liquid. The gas-liquid separator is mounted ona suitable pressure-resistant sampling bottle, the gas-liquid separator has the advantages that when the separator is used for manual sampling analysis, the separator is low in pollution probability,high in analysis efficiency and low in analysis cost, an expensive head-space sampler and an expensive blowing-capture sampler are not arranged in a laboratory and the like. A device comprises the gas-liquid separator, a gas path system, a six-way valve and the like and has the advantages that the device is simple in structure and convenient to maintain and can be directly mounted on devices to bemonitored, a liquid path is simplified, real-time monitoring results are accurately acquired and the like when volatile gas in the liquid is monitored on line by the device.
Description
technical field [0001] The invention relates to the field of gas-liquid separation, in particular to a gas-liquid separator which utilizes vacuum and membrane permeation principles to extract gas target analysis substances from liquid samples. Background technique [0002] In analytical chemistry, methods for detecting volatile substances in liquids often use headspace sampling and purge-and-trap sampling. The headspace sampling method is to transfer a certain volume of liquid sample into a headspace bottle of a certain volume, and the sample only occupies part of the space in the headspace bottle, and then seal the headspace bottle gland; The closed space composed of gas phase and liquid phase is kept at a certain temperature for a certain period of time. After the components are distributed and balanced between the two phases, a certain gas phase sample is taken for chromatographic analysis. The purge-and-trap sampling method is to continuously purge the liquid sample wit...
Claims
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IPC IPC(8): G01N1/34G01N1/22B01D19/00
CPCB01D19/00G01N1/2205G01N1/34
Inventor 朱燕超赵春梅朱正禄
Owner 朱燕超