A new combined chromatograph for detecting argon content in oxygen

Abstract

A novel combined gas chromatograph for detecting argon content in oxygen includes a detection rack, a deoxygenating agent column, a first molecular sieve column, and a second molecular sieve column. A limiting frame assembly is symmetrically mounted on the inner side of the detection rack. The deoxygenating agent column, the first molecular sieve column, and the second molecular sieve column are arranged and engaged within the limiting frame assembly. These columns are arranged parallel to each other from bottom to top. The inlet end of the deoxygenating agent column is connected to a first vaporization chamber, and the outlet end is connected to a connecting gas tube. The other end of the connecting gas tube is connected to the first molecular sieve column. This invention utilizes a conventional TCD detector in gas chromatography with a dual gas path, allowing the conventional second molecular sieve column, in conjunction with the deoxygenating agent column and the first molecular sieve column connected in series, to directly detect argon content. The entire device is easy to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of chromatographs, in particular to a novel combined chromatograph for detecting the content of argon in oxygen. Background Art

[0002] Chromatograph is a device used for chromatographic separation and analysis, including gas chromatograph, liquid chromatograph and gel chromatograph, etc. These chromatographs are widely used for analysis of certain contents of chemical products and polymer materials. Conventional analysis of oxygen content is performed using 5A / 13X molecular sieve, but in the presence of argon, it is found that the peak times of oxygen and argon overlap, making it difficult to determine the content of oxygen or argon. When detecting the argon content, gas chromatography using a 5A molecular sieve column or a zirconium oxide detector is usually used.

[0003] When the existing chromatograph performs quantitative analysis of argon gas by common gas chromatography;

[0004] 1. Gas chromatography using 5A molecular sieve chromatographic column: Use 9m 5A molecular sieve chromatographic column, or 5.1m, and reduce pressure to -19℃ (ice salt); - The column is too long, the analysis takes a long time, and the short column requires a reduced pressure of -19℃ (ice salt). This type of column box controllable gas chromatograph is expensive and has high operating costs;

[0005] 2. Gas chromatography using zirconium oxide detector: using 13X molecular sieve chromatographic column; - highly targeted, high price, and limited applicability;

[0006] A highly targeted and specialized detection system is required for detection, which is costly and not widely applicable.

[0007] Therefore, in view of this, the existing structure and deficiencies are studied and improved, and a new combined chromatograph for detecting the argon content in oxygen is proposed, in order to achieve a more practical purpose. Utility Model Content

[0008] The purpose of the utility model is to provide a new type combined chromatograph for detecting the argon content in oxygen, so as to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of combined chromatograph for detecting the argon content in oxygen, comprising a detection box frame, a deoxidizer chromatographic column, a No. 1 molecular sieve chromatographic column and a No. 2 molecular sieve chromatographic column, a limit frame assembly is symmetrically arranged on the inner side of the detection box frame, a deoxidizer chromatographic column, a No. 1 molecular sieve chromatographic column and a No. 2 molecular sieve chromatographic column are arranged and clamped on the inner side of the limit frame assembly, the deoxidizer chromatographic column, the No. 1 molecular sieve chromatographic column and the No. 2 molecular sieve chromatographic column are arranged in parallel from bottom to top, an air inlet end of the deoxidizer chromatographic column is connected to a No. 1 vaporization chamber, and an air outlet end of the deoxidizer chromatographic column is connected to a connecting air pipe, the other end of the connecting air pipe is connected to a No. 1 molecular sieve chromatographic column, and an air outlet end of the No. 1 molecular sieve chromatographic column is connected to a No. 1 air supply pipe, and the other end of the No. 1 air supply pipe is connected to a TCD detector;

[0010] The gas inlet end of the No. 2 molecular sieve chromatographic column is connected to the No. 2 vaporization chamber, and the gas outlet end of the No. 2 molecular sieve chromatographic column is connected to the No. 2 gas supply pipe, and the other end of the No. 2 gas supply pipe is connected to the TCD detector.

[0011] Furthermore, the deoxidizer chromatographic column is connected in series with the No. 1 molecular sieve chromatographic column through the connecting air pipe.

[0012] Furthermore, the No. 1 molecular sieve chromatographic column and the No. 2 molecular sieve chromatographic column are connected in parallel with the TCD detector.

[0013] Furthermore, the deoxidizer chromatographic column and the No. 2 molecular sieve chromatographic column are 5A or 13X molecular sieve chromatographic columns, and the No. 1 molecular sieve chromatographic column is a No. 401 or 402 molecular sieve chromatographic column.

[0014] Furthermore, the limiting frame assembly includes a limiting frame plate, a limiting arc groove, and a fixed plate. The limiting arc groove is arranged on the inner side of the limiting frame plate, and a fixed plate is arranged on the outer side of the bottom of the limiting frame plate.

[0015] Furthermore, the limiting frame plate is interlocked with the deoxidizer chromatographic column, the No. 1 molecular sieve chromatographic column and the No. 2 molecular sieve chromatographic column through a plurality of groups of the limiting arc grooves.

[0016] Furthermore, a side slot is provided inside the vertical plate end of the detection box frame, and a pad is symmetrically laid on the bottom of the detection box frame.

[0017] The utility model provides a new combined chromatograph for detecting the argon content in oxygen, which has the following beneficial effects:

[0018] By using a conventional TCD detector gas chromatograph, under a dual gas path, a conventional No. 2 molecular sieve chromatographic column is used in conjunction with a deoxidizer chromatographic column and a No. 1 molecular sieve chromatographic column in series to directly detect the argon content. The entire device is easy to maintain, does not require the use of a capillary column and a high-configuration gas chromatograph, has a low cost, can also be used for conventional production analysis, effectively detects oxygen and argon, which are difficult to detect substances, and has a wide range of uses;

[0019] Under the dual gas path channel, the conventional No. 2 molecular sieve chromatographic column uses hydrogen as the carrier gas to normally analyze and detect oxygen or a mixture of oxygen and argon, nitrogen, methane, and carbon monoxide; the column connected in series with the deoxidizer chromatographic column and the No. 1 molecular sieve chromatographic column is used to detect argon, nitrogen, methane, and carbon monoxide, so as to calculate the difference between the two test results and detect the oxygen content;

[0020] The detection chromatographic columns of the entire device are arranged in a parallel structure, and are limited on the outside by a limiting frame plate to utilize the limiting arc groove to ensure that the positions of the deoxidizer chromatographic column, the No. 1 molecular sieve chromatographic column, and the No. 2 molecular sieve chromatographic column are fixed. The detachable structure also facilitates the replacement and maintenance of multiple chromatographic columns, ensuring the convenience of use of the entire chromatograph. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. In the drawings:

[0022] Figure 1 It is a right-side stereoscopic structural schematic diagram of a novel combined chromatograph for detecting the argon content in oxygen according to the utility model;

[0023] Figure 2 This is a left-side stereoscopic structural schematic diagram of a novel combined chromatograph for detecting the argon content in oxygen according to the utility model;

[0024] Figure 3 The utility model is a schematic diagram of the three-dimensional structure of a limiting frame assembly of a new combined chromatograph for detecting the argon content in oxygen.

[0025] In the figure: 1. detection box frame; 101. side slot; 102. pad; 2. deoxidizer chromatographic column; 3. No. 1 molecular sieve chromatographic column; 4. No. 2 molecular sieve chromatographic column; 5. limit frame assembly; 501. limit frame plate; 502. limit arc groove; 503. fixed plate; 6. No. 1 vaporization chamber; 7. TCD detector; 8. No. 2 vaporization chamber; 9. No. 2 gas supply pipe; 10. connecting gas pipe; 11. No. 1 gas supply pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-3 The utility model provides a technical solution: a novel combined chromatograph for detecting the argon content in oxygen, comprising a detection box frame 1, a deoxidizer chromatographic column 2, a No. 1 molecular sieve chromatographic column 3 and a No. 2 molecular sieve chromatographic column 4, a limit frame assembly 5 is symmetrically arranged on the inner side of the detection box frame 1, and the deoxidizer chromatographic column 2, the No. 1 molecular sieve chromatographic column 3 and the No. 2 molecular sieve chromatographic column 4 are arranged and clamped on the inner side of the limit frame assembly 5, the deoxidizer chromatographic column 2, the No. 1 molecular sieve chromatographic column 3 and the No. 2 molecular sieve chromatographic column 4 are arranged in parallel from bottom to top, the air inlet end of the deoxidizer chromatographic column 2 is connected to a No. 1 vaporization chamber 6, and the air outlet end of the deoxidizer chromatographic column 2 is connected to a connecting air pipe 10, the other end of the connecting air pipe 10 is connected to the No. 1 molecular sieve chromatographic column 3, and the air outlet end of the No. 1 molecular sieve chromatographic column 3 is connected to a No. 1 air supply pipe 11, and the other end of the No. 1 air supply pipe 11 is connected to a TCD detector 7;

[0028] The air inlet end of the No. 2 molecular sieve chromatographic column 4 is connected to the No. 2 vaporization chamber 8, and the air outlet end of the No. 2 molecular sieve chromatographic column 4 is connected to the No. 2 air supply pipe 9, and the other end of the No. 2 air supply pipe 9 is connected to the TCD detector 7; the deoxidizer chromatographic column 2 is connected in series with the No. 1 molecular sieve chromatographic column 3 through the connecting air pipe 10; the No. 1 molecular sieve chromatographic column 3 and the No. 2 molecular sieve chromatographic column 4 are connected in parallel with the TCD detector 7; the deoxidizer chromatographic column 2 and the No. 2 molecular sieve chromatographic column 4 are 5A or 13X molecular sieve chromatographic columns, and the No. 1 molecular sieve chromatographic column 3 is 401 or 402 No. 1 molecular sieve chromatographic column; the limiting frame assembly 5 includes a limiting frame plate 501, a limiting arc groove 502, and a fixed plate 503. The inner side of the limiting frame plate 501 is arranged with a limiting arc groove 502, and the bottom outer side of the limiting frame plate 501 is provided with a fixed plate 503; the limiting frame plate 501 is interlocked with the deoxidizer chromatographic column 2, the No. 1 molecular sieve chromatographic column 3 and the No. 2 molecular sieve chromatographic column 4 through multiple groups of limiting arc grooves 502; the vertical plate end of the detection box frame 1 is provided with a side slot 101, and the bottom of the detection box frame 1 is symmetrically laid with a pad 102;

[0029] By using a conventional TCD detector 7 for gas chromatography, under a dual gas path, a conventional No. 2 molecular sieve chromatographic column 4 is used in conjunction with a deoxidizer chromatographic column 2 and a No. 1 molecular sieve chromatographic column 3 in series, so that the argon content can be directly detected. The entire device is easy to maintain, and there is no need to use a capillary column and a high-configuration gas chromatograph. The cost is low and it can also be used for conventional production analysis, effectively detecting oxygen and argon, which are substances that are difficult to detect, and has a wide range of uses.

[0030] Under the dual gas path channel, the conventional No. 2 molecular sieve chromatographic column 4 is used to normally analyze and detect oxygen or a mixture of oxygen and argon, nitrogen, methane, and carbon monoxide; the deoxidizer chromatographic column 2 and the No. 1 molecular sieve chromatographic column 3 are used in series to detect argon, nitrogen, methane, and carbon monoxide, so as to calculate the difference between the two detection results, thereby detecting the oxygen content;

[0031] The detection chromatographic columns of the entire device are arranged in a parallel structure, and are limited by a limiting frame plate 501 on the outside thereof, so as to utilize the limiting arc groove 502 to ensure that the positions of the deoxidizer chromatographic column 2, the No. 1 molecular sieve chromatographic column 3, and the No. 2 molecular sieve chromatographic column 4 are fixed. The detachable structure is also convenient for replacing and maintaining multiple chromatographic columns, thereby ensuring the convenience of use of the entire chromatograph.

[0032] Working principle: For this type of new combined chromatograph for detecting the argon content in oxygen, firstly, equal amounts of gas are input from the No. 1 vaporizer 6 and the No. 2 vaporizer 8 at the upper and lower ends under the double gas path, so that the gas processed by the No. 1 vaporizer 6 will enter the column connected in series with the deoxidizer chromatographic column 2 and the No. 1 molecular sieve chromatographic column 3, and then the argon, nitrogen, methane and carbon monoxide contents are detected by the TCD detector 7, while the gas entering from the No. 2 vaporizer 8 at the top will pass through the conventional No. 2 molecular sieve chromatographic column 4. , to normally analyze the oxygen or the mixture of oxygen and argon, nitrogen, methane, and carbon monoxide in the detection gas, and then analyze the data detected at the upper and lower ends, to detect the oxygen content by calculating the difference in the rated value between the detection results of the two. When the chromatographic column needs to be replaced, the bolts on the single-side fixing plate 503 can be removed to remove the single-side limiting frame plate 501, so as to facilitate the replacement of the deoxidizer chromatographic column 2, the No. 1 molecular sieve chromatographic column 3 and the No. 2 molecular sieve chromatographic column 4.

[0033] The above description is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be thought of by any technician familiar with the field within the technical scope disclosed by the utility model without creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A novel combined chromatograph for detecting the argon content in oxygen, comprising a detection box frame (1), a deoxidizer chromatographic column (2), a No. 1 molecular sieve chromatographic column (3) and a No. 2 molecular sieve chromatographic column (4), characterized in that: A limiting frame assembly (5) is symmetrically arranged on the inner side of the detection box frame (1), and a deoxidizer chromatographic column (2), a No. 1 molecular sieve chromatographic column (3) and a No. 2 molecular sieve chromatographic column (4) are arranged and engaged on the inner side of the limiting frame assembly (5), and the deoxidizer chromatographic column (2), the No. 1 molecular sieve chromatographic column (3) and the No. 2 molecular sieve chromatographic column (4) are arranged in parallel from bottom to top, the air inlet end of the deoxidizer chromatographic column (2) is connected to a No. 1 vaporization chamber (6), and the air outlet end of the deoxidizer chromatographic column (2) is connected to a connecting air pipe (10), the other end of the connecting air pipe (10) is connected to the No. 1 molecular sieve chromatographic column (3), and the air outlet end of the No. 1 molecular sieve chromatographic column (3) is connected to a No. 1 air supply pipe (11), and the other end of the No. 1 air supply pipe (11) is connected to a TCD detector (7); The gas inlet end of the No. 2 molecular sieve chromatographic column (4) is connected to a No. 2 vaporization chamber (8), and the gas outlet end of the No. 2 molecular sieve chromatographic column (4) is connected to a No. 2 gas supply pipe (9), and the other end of the No. 2 gas supply pipe (9) is connected to a TCD detector (7).

2. A novel combined chromatograph for detecting the argon content in oxygen according to claim 1, characterized in that: The deoxidizer chromatographic column (2) is connected in series with the No. 1 molecular sieve chromatographic column (3) through the connecting air pipe (10).

3. A novel combined chromatograph for detecting the argon content in oxygen according to claim 1, characterized in that: The No. 1 molecular sieve chromatographic column (3) and the No. 2 molecular sieve chromatographic column (4) are connected in parallel with the TCD detector (7).

4. A novel combined chromatograph for detecting the argon content in oxygen according to claim 1, characterized in that: The deoxidizer chromatographic column (2) and the No. 2 molecular sieve chromatographic column (4) are 5A or 13X molecular sieve chromatographic columns, and the No. 1 molecular sieve chromatographic column (3) is a No. 1 molecular sieve chromatographic column of 401 or 402.

5. A novel combined chromatograph for detecting the argon content in oxygen according to claim 1, characterized in that: The limiting frame assembly (5) comprises a limiting frame plate (501), a limiting arc groove (502), and a fixing plate (503); the limiting arc groove (502) is arranged on the inner side of the limiting frame plate (501), and the fixing plate (503) is arranged on the outer side of the bottom of the limiting frame plate (501).

6. A novel combined chromatograph for detecting the argon content in oxygen according to claim 5, characterized in that: The limiting frame plate (501) is interlocked with the deoxidizer chromatographic column (2), the first molecular sieve chromatographic column (3) and the second molecular sieve chromatographic column (4) via a plurality of groups of limiting arc grooves (502).

7. A novel combined chromatograph for detecting the argon content in oxygen according to claim 1, characterized in that: A side slot (101) is provided inside the vertical plate end of the detection box frame (1), and a pad (102) is symmetrically laid on the bottom of the detection box frame (1).

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