Gas chromatography external filter device

Abstract

The utility model discloses a gas chromatography plug-in filter device, which relates to the technical field of gas chromatographs, and comprises a device body, a degreasing cotton layer, an allochroic silica gel layer and a 13X type molecular sieve layer, a cavity is arranged in the device body, one end of the device body is provided with a gas inlet, the other end of the device body is provided with a gas outlet, and the 13X type molecular sieve layer is arranged in the cavity. The gas outlet is used for being connected and communicated with a gas chromatograph through a pipeline, and the gas inlet is used for being communicated with a gas sample bag through a pipeline; the degreasing cotton layer is arranged in the middle of the cavity to divide the cavity into a first containing cavity and a second containing cavity, the air inlet is communicated with the first containing cavity, and the air outlet is communicated with the second containing cavity; the allochroic silica gel layer is used for filling the first accommodating cavity; the 13X type molecular sieve layer is used for filling the second accommodating cavity, the structure is simple, the use is convenient, the service life of equipment is effectively prolonged, and the quantification accuracy is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a gas chromatograph external filtering device. Background Art

[0002] Gas chromatography is an extremely effective analytical method for separating and analyzing multi-component mixtures. Its operating principle is to exploit the differences in the properties of substances to separate the components in a mixture. A gas system provides a carrier gas at a certain pressure and flow rate. After injection, the sample is carried by the carrier gas into the gas chromatography column for chromatographic analysis, where each component is detected sequentially. It offers excellent analytical results, high sensitivity, and rapid analysis. Gas chromatographs are precision instruments that require clean gas to enter the instrument, minimizing the presence of moisture, low-molecular-weight organic matter, and solid particulates. To prevent moisture, low-molecular-weight organic matter, and solid particulates from entering the chromatographic column and causing significant damage to the chromatograph, the sample must be filtered before injection. Utility Model Content

[0003] The purpose of the utility model is to provide a gas chromatograph external filtering device to solve the problems existing in the above-mentioned prior art, with a simple structure, easy to use, and effectively improve the service life of the equipment and the quantitative accuracy.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a gas chromatography external filtering device, comprising: a device body and a cotton wool layer, a color-changing silica gel layer and a 13X molecular sieve layer, wherein a cavity is arranged in the device body, an air inlet is arranged at one end of the device body, and an air outlet is arranged at the other end, the air outlet is used to be connected and communicated with a gas chromatograph through a pipeline, and the air inlet is used to communicate with a gas sample bag through a pipeline; the cotton wool layer is arranged in the middle of the cavity to divide the cavity into a first accommodating chamber and a second accommodating chamber, the air inlet is communicated with the first accommodating chamber, and the air outlet is communicated with the second accommodating chamber; the color-changing silica gel layer is used to fill the first accommodating chamber; the 13X molecular sieve layer is used to fill the second accommodating chamber.

[0006] Preferably, the device body is a cylindrical structure.

[0007] Preferably, the device body is a transparent structure.

[0008] Preferably, it further comprises a first quick connector and a second quick connector, wherein the first quick connector is arranged at the air inlet, and the second quick connector is arranged at the air outlet.

[0009] Preferably, it further includes a first isolation cotton layer and a second isolation cotton layer, the first isolation cotton layer is actually arranged between the air inlet and the first accommodating cavity, and the second isolation cotton layer is actually arranged between the air outlet and the second accommodating cavity.

[0010] Preferably, the device body is an empty gas purifier barrel with a diameter of 3.3 cm and a length of 30 cm.

[0011] Compared with the prior art, the utility model has achieved the following technical effects:

[0012] The utility model provides a gas chromatography external filtering device. By adding molecular sieves, color-changing silica gel and absorbent cotton into the device body, it can effectively remove moisture, low-molecular organic matter and solid particulate matter in flue exhaust gas, protect the gas chromatograph and the six-way valve, and improve the service life of the equipment and the quantitative accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the gas chromatography external filter device provided by the utility model when in use;

[0015] In the figure: 1. Device body; 2. Absorbent cotton layer; 3. Color-changing silica gel layer; 4. 13X molecular sieve layer; 5. Gas sample bag; 6. Gas chromatograph. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The purpose of the utility model is to provide a gas chromatograph external filtering device to solve the problems existing in the above-mentioned prior art, with a simple structure, easy to use, and effectively improve the service life of the equipment and the quantitative accuracy.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] The utility model provides a gas chromatography external filtering device, such as Figure 1 As shown, it comprises: a device body 1 and an absorbent cotton layer 2, a color-changing silica gel layer 3 and a 13X type molecular sieve layer 4. A cavity is provided in the device body 1, an air inlet is provided at one end of the device body 1, and an air outlet is provided at the other end. The air outlet is used to be connected and communicated with a gas chromatograph 6 through a pipeline, and the air inlet is used to be communicated with a gas sample bag 5 through a pipeline; the absorbent cotton layer 2 is provided in the middle of the cavity to divide the cavity into a first accommodating chamber and a second accommodating chamber, and different filter materials can be placed respectively to achieve graded filtration of the gas and improve the filtration effect. The air inlet is communicated with the first accommodating chamber, and the air outlet is communicated with the second accommodating chamber; the color-changing silica gel layer 3 is used to fill the first accommodating chamber, and the color-changing silica gel layer 3 can absorb moisture in the gas and change color. It intuitively displays the moisture content in the gas. When the color of the color-changing silica gel changes to a certain extent, it prompts that the filter material needs to be replaced, so that users can timely understand the working status of the filter device and ensure the continuous effectiveness of the filtering effect; the 13X type molecular sieve layer 4 is used to fill the second accommodating cavity. The 13X type molecular sieve layer 4 can adsorb specific molecules in the gas, such as water, carbon dioxide, hydrogen sulfide, etc., to protect the gas chromatograph 6 from the influence of these harmful substances, thereby improving the service life of the equipment and the accuracy of the analysis results. By setting the air inlet and air outlet, it can be conveniently connected to the gas sample bag 5 and the gas chromatograph 6 to realize the filtering and transportation of the gas, ensure the purity of the gas entering the gas chromatograph 6, and improve the accuracy of the analysis results.

[0020] In a preferred embodiment, the device body 1 is a cylindrical structure. The cylindrical structure of the device body 1 can provide a larger internal space to accommodate the filter material while not taking up too much space, and is easy to install and use.

[0021] In a preferred embodiment, the device body 1 is a transparent structure. The transparent structure of the device body 1 allows the user to intuitively observe the use of the internal filter material, and to promptly identify and handle any problems.

[0022] In a preferred embodiment, the gas chromatography external filter device also includes a first quick connector and a second quick connector. The first quick connector is arranged at the air inlet, and the second quick structure is arranged at the air outlet. The first quick connector and the second quick connector are arranged to facilitate quick connection and disassembly with the gas sample bag 5 and the gas chromatograph 6, thereby improving the convenience of operation.

[0023] In a preferred embodiment, the gas chromatography external filter device also includes a first isolation cotton layer and a second isolation cotton layer. The first isolation cotton layer is actually arranged between the air inlet and the first accommodating cavity, and the second isolation cotton layer is actually arranged between the air outlet and the second accommodating cavity. The first isolation cotton layer and the second isolation cotton layer can further filter the gas to prevent the filter material from escaping from the device body 1, and can also play the role of isolating and protecting the filter material.

[0024] In a preferred embodiment, the device body 1 is an empty gas purifier barrel with a diameter of 3.3 cm and a length of 30 cm. It has a simple structure and is easy to obtain materials. Such a size design can provide sufficient internal space to accommodate the filter material without being too large to occupy too much space, making it easy to carry and use.

[0025] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A gas chromatography external filter device, characterized in that: include: The device body is provided with a cavity, an air inlet is provided at one end of the device body, and an air outlet is provided at the other end, the air outlet is used to be connected and communicated with the gas chromatograph through a pipeline, and the air inlet is used to be communicated with the gas sample bag through a pipeline; an absorbent cotton layer, the absorbent cotton layer being arranged in the middle of the cavity to divide the cavity into a first accommodating cavity and a second accommodating cavity, the air inlet being communicated with the first accommodating cavity, and the air outlet being communicated with the second accommodating cavity; a color-changing silicone layer, the color-changing silicone layer being used to fill the first accommodating cavity; and A 13X molecular sieve layer is used to fill the second accommodating cavity.

2. The gas chromatography external filter device according to claim 1, characterized in that: The device body is a cylindrical structure.

3. The gas chromatography external filter device according to claim 2, characterized in that: The device body is a transparent structure.

4. The gas chromatography external filter device according to claim 3, characterized in that: It also includes a first quick connector and a second quick connector, wherein the first quick connector is arranged at the air inlet, and the second quick connector is arranged at the air outlet.

5. The gas chromatography external filter device according to claim 4, characterized in that: It also includes a first isolation cotton layer and a second isolation cotton layer. The first isolation cotton layer is actually arranged between the air inlet and the first accommodating cavity, and the second isolation cotton layer is actually arranged between the air outlet and the second accommodating cavity.

6. The gas chromatography external filter device according to claim 5, characterized in that: The device body is an empty gas purifier barrel with a diameter of 3.3 cm and a length of 30 cm.

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