CN220851769U - Gas chromatograph hydrogen carrier gas recycling system - Google Patents
Gas chromatograph hydrogen carrier gas recycling system Download PDFInfo
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- CN220851769U CN220851769U CN202322666612.1U CN202322666612U CN220851769U CN 220851769 U CN220851769 U CN 220851769U CN 202322666612 U CN202322666612 U CN 202322666612U CN 220851769 U CN220851769 U CN 220851769U
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- hydrogen
- gas
- carrier gas
- check valve
- pressure
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 135
- 239000001257 hydrogen Substances 0.000 title claims abstract description 135
- 239000007789 gas Substances 0.000 title claims abstract description 107
- 239000012159 carrier gas Substances 0.000 title claims abstract description 54
- 238000004064 recycling Methods 0.000 title claims abstract description 26
- 238000004817 gas chromatography Methods 0.000 claims abstract description 26
- 238000004587 chromatography analysis Methods 0.000 claims abstract description 10
- 238000001179 sorption measurement Methods 0.000 claims description 22
- 150000002500 ions Chemical class 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000002808 molecular sieve Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 7
- 239000002699 waste material Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The application provides a gas chromatography hydrogen carrier gas recycling system which comprises a chromatography gas circuit system, a hydrogen collecting bottle, a gas purifier and a hydrogen flame ion detector which are sequentially connected in series; the chromatographic gas circuit system and the hydrogen collecting bottle are sequentially connected through a first check valve and a second check valve; a hydrogen bottle is also connected between the first check valve and the second check valve; the output end of the hydrogen cylinder is also connected with a pressure regulator. The system of the application recycles the waste hydrogen carrier gas discharged by the chromatographic gas path system through the matched use of the equipment, and solves the problem of hydrogen carrier gas waste caused by the fact that the hydrogen carrier gas is emptied and cannot be recycled in the working process of the existing gas chromatograph using hydrogen as carrier gas.
Description
Technical Field
The application relates to the technical field of gas chromatography, in particular to a gas chromatography hydrogen carrier gas recycling system.
Background
Gas chromatography (gas chromatography, GC for short) is a separation and analysis technology, and is widely applied to industry, agriculture, national defense, construction and scientific research. Gas chromatography is a chromatographic analysis method using a gas as a mobile phase. The vaporized sample is carried into the chromatographic column by the carrier gas (mobile phase), the forces of molecules of each component in the sample are different between the stationary phase in the column and the components in the sample, the flowing out times of each component from the chromatographic column are different, and the components are separated from each other. A chromatogram is prepared that marks the time and concentration of each component exiting the column using a suitable identification and recording system. According to the peak time and sequence indicated in the graph, the compounds can be qualitatively analyzed; the compound can be quantitatively analyzed according to the peak height and the area size. The method has the characteristics of high efficiency, high sensitivity, strong selectivity, high analysis speed, wide application, simple operation and the like. Is suitable for qualitative and quantitative analysis of volatile organic compounds. Non-volatile liquid and solid substances can be analyzed after pyrolysis and gasification. Can be used together with infrared absorption spectrometry or mass spectrometry, and can achieve higher accuracy by using chromatography as a means for separating complex samples.
The carrier gas commonly used by the chromatograph in the gas chromatography is various, hydrogen is one of the commonly used carrier gases, and because the carrier gas is in an open state in the starting process of the chromatograph, a certain amount of carrier gas is required to pass through in any time period in the starting process of the carrier gas system, so that the aims of protecting the instrument and the chromatographic column are fulfilled. In some mechanisms that frequently use gas chromatography, the chromatograph needs to be in an operation state all the time, and the usage amount of the carrier gas is large, and in the process of using the gas chromatograph, the carrier gas is generally discharged through being emptied after treatment or directly emptied, which causes that the carrier gas cannot be fully utilized and is wasted.
Disclosure of utility model
The application provides a gas chromatograph hydrogen carrier gas recycling system which is used for solving the problem of hydrogen carrier gas waste caused by the fact that hydrogen carrier gas cannot be recycled due to the emptying treatment of the existing gas chromatograph using hydrogen as carrier gas in the working process.
The application provides a gas chromatography hydrogen carrier gas recycling system which comprises a chromatography gas circuit system, a hydrogen collecting bottle, a gas purifier and a hydrogen flame ion detector which are sequentially connected in series;
The chromatographic gas circuit system and the hydrogen collecting bottle are sequentially connected through a first check valve and a second check valve; a hydrogen bottle is also connected between the first check valve and the second check valve;
The output end of the hydrogen cylinder is also connected with a pressure regulator.
Optionally, a pressure gauge is also arranged between the hydrogen collecting bottle and the gas purifier.
Optionally, a flow regulator is also provided between the gas purifier and the hydrogen flame ion detector.
Optionally, the gas purifier is connected with the flow regulator through a booster valve.
Optionally, the gas purifier comprises a silica gel adsorption tower, an activated carbon adsorption tower and a molecular sieve adsorption tower which are sequentially connected in series.
Optionally, the bottle body of the hydrogen collecting bottle is divided into an air inlet area and an air outlet area by a partition board, and the air inlet area is communicated with the air outlet area through a pressure valve;
The bottle mouth of the hydrogen collecting bottle is sealed by a tube shell with two sealed ends; an air inlet pipe and an air outlet pipe are arranged in the pipe shell;
One end of the air inlet pipe penetrates through one side surface and the bottom surface of the pipe shell to extend into the air inlet area, and the other end of the air inlet pipe is connected with the output end of the second check valve;
One end of the exhaust pipe penetrates through one side surface and the bottom surface of the pipe shell and stretches into the exhaust area, and the other end of the exhaust pipe is connected with the gas purifier.
Optionally, the inner wall of the hydrogen collecting bottle is provided with a lining made of aluminum alloy or high-density polyethylene.
The application provides a gas chromatography hydrogen carrier gas recycling system, which is characterized in that a hydrogen cylinder is arranged to pressurize and store waste hydrogen carrier gas discharged by a chromatography gas path system in a hydrogen collecting bottle, and then the gas is purified by a gas purifier and then is conveyed into a hydrogen flame ion detector to be burnt as fuel, so that the recycling of the waste hydrogen carrier gas discharged by the chromatography gas path system is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a recycling system for hydrogen carrier gas for gas chromatography according to an embodiment of the application;
FIG. 2 is a schematic diagram of a system for recycling a hydrogen carrier gas for gas chromatography according to another embodiment of the application;
FIG. 3 is a schematic diagram of a system for recycling a hydrogen carrier gas for gas chromatography according to another embodiment of the application;
FIG. 4 is a schematic diagram of a system for recycling a hydrogen carrier gas for gas chromatography according to another embodiment of the application;
FIG. 5 is a schematic diagram of a system for recycling a hydrogen carrier gas for gas chromatography according to another embodiment of the application;
FIG. 6 is a schematic diagram of a hydrogen collection bottle according to an embodiment of the present application;
Fig. 7 is a schematic structural diagram of a gas chromatography hydrogen carrier gas recycling system according to another embodiment of the present application.
Reference numerals illustrate:
1. A chromatographic gas path system; 2. a hydrogen collection bottle; 3. a gas purifier; 4. a hydrogen flame ion detector; 5. a hydrogen cylinder; 6. a controller; 11. a first non-return valve; 12. a second non-return valve; 21. a pressure gauge; 22. a partition plate; 23. a tube shell; 31. a silica gel adsorption tower; 32. an activated carbon adsorption tower; 33. a molecular sieve adsorption tower; 41. a flow regulator; 42. a pressure increasing valve; 51. a pressure regulator; 201. a pressure valve; 202. an air inlet pipe; 203. and an exhaust pipe.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are also within the scope of the application.
As shown in fig. 1, the application provides a gas chromatography hydrogen carrier gas recycling system, which comprises a chromatography gas circuit system 1, a hydrogen collecting bottle 2, a gas purifier 3 and a hydrogen flame ion detector 4 which are sequentially connected in series;
The chromatographic gas path system 1 and the hydrogen collecting bottle 2 are sequentially connected through a first check valve 11 and a second check valve 12; a hydrogen bottle 5 is also connected between the first check valve 11 and the second check valve 12;
the output end of the hydrogen cylinder 5 is also connected with a pressure regulator 51.
In the present application, the first check valve 11 is provided to prevent the gas of the hydrogen cylinder 5 from flowing backward into the chromatographic gas path system.
In the application, the raw material burnt by the hydrogen flame ion detector 4 is hydrogen, and in the application, the waste hydrogen carrier gas discharged by the chromatographic gas path system 1 is pressurized by arranging the hydrogen cylinder 5 and then purified by using subsequent equipment for recycling.
When the system is used, after the pressure of the hydrogen output by the hydrogen cylinder 5 is regulated by the pressure regulator 51, the hydrogen is mixed with the waste carrier gas discharged from the chromatographic gas path system 1, the carrier gas is pressurized (because the carrier gas discharged by the chromatographic gas path system 1 has low pressure and smaller flow, the hydrogen output by the hydrogen cylinder 5 is needed to be pressurized, so that the carrier gas can smoothly enter the hydrogen collecting bottle 2), the gas mixed by the carrier gas and the hydrogen enters the hydrogen collecting bottle 2 through the second check valve 12 for temporary storage, and the purpose of the second check valve 12 is to prevent the gas of the hydrogen collecting bottle 2 from flowing backwards into the chromatographic gas path system.
The gas discharged from the hydrogen collecting bottle 2 enters the gas purifier 3 for adsorption, the sample in the hydrogen carrier gas is adsorbed and removed, and then is conveyed to the hydrogen flame ion detector 4 to be used as a combustion raw material of the detector, and the waste hydrogen carrier gas output by the chromatographic gas path system is recycled through the process.
The application provides a gas chromatography hydrogen carrier gas recycling system, which is characterized in that a hydrogen bottle 5 is arranged to pressurize and store waste hydrogen carrier gas discharged by a chromatography gas circuit system 1 in a hydrogen collecting bottle 2, and then a gas purifier 3 is used for purifying the gas and then delivering the purified gas into a hydrogen flame ion detector 4 to be used as fuel for combustion, so that the recycling of the waste hydrogen carrier gas discharged by the chromatography gas circuit system 1 is realized.
As shown in fig. 2, a pressure gauge 21 is optionally further provided between the hydrogen gas collection bottle 2 and the gas purifier 3.
In the application, a pressure gauge 21 is arranged between the hydrogen collecting bottle 2 and the gas purifier 3, and the pressure of the gas output by the hydrogen collecting bottle 2 can be monitored in real time through the pressure gauge 21, and then the opening degree of the pressure regulator 51 is regulated to regulate the pressure of the hydrogen output by the hydrogen bottle 5.
As shown in fig. 3, optionally, a flow regulator 41 is also provided between the gas purifier 3 and the hydrogen flame ion detector 4.
In the application, the flow regulator 41 is arranged between the gas purifier 3 and the hydrogen flame ion detector 4, so that an operator can conveniently regulate the flow of hydrogen entering the hydrogen flame ion detector 4, and the flow of the gas entering the hydrogen flame ion detector 4 is stabilized at 40ml/min by regulating the flow regulator 41 in actual use.
As shown in fig. 4, the gas purifier 3 and the flow regulator 41 may be connected by a pressure increasing valve 42.
In the present application, since the flow rate (pressure) of the gas after impurity removal and purification by the gas purifier 3 is reduced, a certain pressure (for example, 0.6 MPa) is required for the gas entering the hydrogen flame ion detector 4, so as to ensure stable combustion of the gas entering the hydrogen flame ion detector 4.
As shown in fig. 5, alternatively, the gas purifier 3 includes a silica gel adsorption column 31, an activated carbon adsorption column 32, and a molecular sieve adsorption column 33, which are sequentially connected in series.
In the application, the silica gel adsorption tower 31 is arranged to dry the gas and remove the moisture in the gas, the activated carbon adsorption tower 32 is used for adsorbing and removing the sample carried in the carrier gas, the molecular sieve adsorption tower 33 is further arranged to purify the gas, and the gas is purified and dried by the silica gel adsorption tower 31, the activated carbon adsorption tower 32 and the molecular sieve adsorption tower 33 which are connected in series, so that the gas enters the hydrogen flame ion detector 4 to be burnt smoothly, thereby reducing the error of the detector.
As shown in fig. 6, optionally, the inside of the hydrogen collecting bottle 2 is divided into an air inlet area and an air outlet area by a partition plate 22, and the air inlet area and the air outlet area are communicated through a pressure valve 201;
The bottle mouth of the hydrogen collecting bottle 2 is sealed by a tube shell 23 with two sealed ends; an air inlet pipe 202 and an air outlet pipe 203 are arranged in the pipe shell 23;
One end of the air inlet pipe 202 penetrates through one side surface and the bottom surface of the pipe shell 23 to extend into the air inlet area, and the other end of the air inlet pipe is connected with the output end of the second check valve 12;
One end of the exhaust pipe 203 penetrates one side and the bottom surface of the pipe case 23 to extend into the exhaust area, and the other end is connected to the gas purifier 3.
In the application, the hydrogen collecting bottle 2 is divided into the gas inlet area and the gas outlet area by the partition board 22, the gas inlet area mainly plays a role of temporarily storing gas, and the partition board 22 is used for separating the input and output of the gas, so that the condition of preventing the gas from escaping can be realized while the separation of the input and output of the gas is realized. Since the exhaust area mainly plays a role of exhaust, in use, the volume of the gas inlet area should be larger than that of the exhaust area to promote the gas storage capacity of the hydrogen collection bottle 2.
The hydrogen collecting bottle 2 serves the purpose of temporarily storing hydrogen and is equivalent to a low-pressure hydrogen storage container, so that the hydrogen collecting bottle is not required to have the same strength requirement as a high-pressure hydrogen storage steel bottle in design. In practical use, the opening pressure of the pressure valve 201 is slightly higher than the pressure of the hydrogen gas output from the hydrogen cylinder 5, for example, 0.3 to 0.4MPa higher than the pressure of the hydrogen gas output from the hydrogen cylinder 5. This allows more gas to be stored while ensuring that hydrogen can be output from the hydrogen collection bottle 2.
As shown in fig. 7, the system is optionally further provided with a controller 6, and the pressure gauge 21 and the pressure regulator 51 are electrically connected to the controller 6.
In the application, when the pressure gauge 21 detects that the pressure of the gas discharged from the exhaust pipe 203 is smaller than a preset low value in use, the pressure gauge 21 feeds back pressure data to the controller 6, and the controller 6 controls the opening degree of the pressure regulator 51 so as to regulate the pressure (flow rate) of the gas output by the hydrogen cylinder 5; when the pressure gauge 21 detects that the pressure of the gas discharged from the exhaust pipe 203 is greater than a preset high value, the pressure gauge 21 feeds back pressure data to the controller 6, and the controller 6 controls the opening degree of the pressure regulator 51, thereby reducing the pressure (flow rate) of the gas output from the hydrogen cylinder 5, and realizing the control of the pressure (flow rate) of the gas discharged from the exhaust pipe 203.
A gas chromatography hydrogen carrier gas recycling system has the following working processes:
When in use, the hydrogen output by the hydrogen cylinder 5 is mixed with the waste carrier gas discharged from the chromatographic gas path system 1 after the pressure is regulated by the pressure regulator 51, and enters the gas inlet area in the hydrogen collecting cylinder 2 from the gas inlet pipe 202 of the hydrogen collecting cylinder 2 through the second check valve 12, when the gas pressure in the gas inlet area rises to a certain value, the pressure valve 201 arranged on the partition plate 22 is opened under the driving of the hydrogen pressure, and at the moment, the hydrogen in the gas inlet area of the hydrogen collecting cylinder 2 enters the gas outlet area from the gas inlet area. The hydrogen enters the exhaust area and then is exhausted from the exhaust pipe 203 passing through the pipe shell 23, the pressure gauge 21 detects the pressure of the gas exhausted by the exhaust pipe 203 in real time, and feeds back the pressure data of the gas to the controller 6 in real time, and the controller 6 controls the opening of the pressure regulator 51 according to the preset flow, so as to control the pressure of the hydrogen output by the hydrogen cylinder 5. In use, when the pressure gauge 21 detects that the pressure of the gas discharged from the exhaust pipe 203 is smaller than a preset low value, the pressure gauge 21 feeds back pressure data to the controller 6, and the controller 6 controls the opening degree of the pressure regulator 51 so as to regulate the pressure (flow rate) of the gas output by the hydrogen cylinder 5; when the pressure gauge 21 detects that the pressure of the gas discharged from the exhaust pipe 203 is greater than a preset high value, the pressure gauge 21 feeds back pressure data to the controller 6, and the controller 6 controls the opening degree of the pressure regulator 51, thereby reducing the pressure (flow rate) of the gas output from the hydrogen cylinder 5, and realizing the control of the pressure (flow rate) of the gas discharged from the exhaust pipe 203.
The gas discharged by the exhaust pipe 203 enters the gas purifier 3 to be adsorbed, the gas firstly passes through the silica gel adsorption tower 31 to adsorb and remove the moisture in the gas, then enters the active carbon adsorption tower 32 to adsorb and remove the organic matters in the gas, then passes through the molecular sieve adsorption tower 33 to further remove and purify the gas, the purified hydrogen is pressurized through the pressurizing valve 42, the hydrogen is conveyed to the hydrogen flame ion detector 4 through the flow regulator 41 to serve as a combustion raw material of the detector, and the waste hydrogen carrier gas output by the chromatographic gas path system is recycled through the above process.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present application, and not limiting thereof; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. The gas chromatography hydrogen carrier gas recycling system is characterized by comprising a chromatography gas circuit system (1), a hydrogen collecting bottle (2), a gas purifier (3) and a hydrogen flame ion detector (4) which are sequentially connected in series;
The chromatographic gas circuit system (1) and the hydrogen collecting bottle (2) are connected through a first check valve (11) and a second check valve (12) in sequence; a hydrogen bottle (5) is also connected between the first check valve (11) and the second check valve (12);
the output end of the hydrogen cylinder (5) is also connected with a pressure regulator (51).
2. The gas chromatography hydrogen carrier gas recycling system according to claim 1, wherein a pressure gauge (21) is further arranged between the hydrogen collecting bottle (2) and the gas purifier (3).
3. The gas chromatography hydrogen carrier gas recycling system according to claim 1, wherein a flow regulator (41) is further provided between the gas purifier (3) and the hydrogen flame ion detector (4).
4. A gas chromatography hydrogen carrier gas recycling system according to claim 3, characterized in that the gas purifier (3) and the flow regulator (41) are connected by a pressure increasing valve (42).
5. The gas chromatography hydrogen carrier gas recycling system according to any one of claims 1 to 4, wherein the gas purifier (3) comprises a silica gel adsorption tower (31), an activated carbon adsorption tower (32) and a molecular sieve adsorption tower (33) which are sequentially connected in series.
6. The gas chromatography hydrogen carrier gas recycling system according to claim 1, wherein the bottle body of the hydrogen collecting bottle (2) is divided into an air inlet area and an air outlet area by a partition plate (22), and the air inlet area and the air outlet area are communicated through a pressure valve (201);
The bottle mouth of the hydrogen collecting bottle (2) is sealed by a tube shell (23) with two sealed ends; an air inlet pipe (202) and an air outlet pipe (203) are arranged in the pipe shell (23);
One end of the air inlet pipe (202) penetrates through one side surface and the bottom surface of the pipe shell (23) to extend into the air inlet area, and the other end of the air inlet pipe is connected with the output end of the second check valve (12);
One end of the exhaust pipe (203) penetrates through one side surface and the bottom surface of the pipe shell (23) to extend into the exhaust area, and the other end of the exhaust pipe is connected with the gas purifier (3).
7. The gas chromatography hydrogen carrier gas recycling system according to claim 2, wherein the system is further provided with a controller (6), and the pressure gauge (21) and the pressure regulator (51) are electrically connected to the controller (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322666612.1U CN220851769U (en) | 2023-10-07 | 2023-10-07 | Gas chromatograph hydrogen carrier gas recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322666612.1U CN220851769U (en) | 2023-10-07 | 2023-10-07 | Gas chromatograph hydrogen carrier gas recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220851769U true CN220851769U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322666612.1U Active CN220851769U (en) | 2023-10-07 | 2023-10-07 | Gas chromatograph hydrogen carrier gas recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220851769U (en) |
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2023
- 2023-10-07 CN CN202322666612.1U patent/CN220851769U/en active Active
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