CN212008446U - Chromatographic analysis device - Google Patents
Chromatographic analysis device Download PDFInfo
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- CN212008446U CN212008446U CN202020019666.2U CN202020019666U CN212008446U CN 212008446 U CN212008446 U CN 212008446U CN 202020019666 U CN202020019666 U CN 202020019666U CN 212008446 U CN212008446 U CN 212008446U
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Abstract
The utility model provides a chromatographic analysis device, the chromatographic analysis device includes chromatographic column, FID detector, hydrogen pipeline, appearance gas pipeline and air conduit, the FID detector includes casing and combustion chamber; the reactor is arranged in the shell and is provided with an inlet and an outlet, the inlet is communicated with the hydrogen pipeline and the sample gas pipeline, and the outlet is communicated with the combustion chamber; the unsaturated hydrocarbon in the sample gas is catalyzed into saturated hydrocarbon by hydrogen and a catalyst in the reactor; the heating unit is used for increasing the temperature in the reactor. The utility model has the advantages of high sensitivity, low detection limit, etc.
Description
Technical Field
The utility model relates to a chromatographic analysis, in particular to chromatographic analysis device.
Background
Since the relative mass response factors of the unsaturated hydrocarbon and the oxygen-containing hydrocarbon in the FID detector are low, the responses of the unsaturated hydrocarbon and the oxygen-containing hydrocarbon are lower at the same concentration of carbon than the saturated hydrocarbon, which causes the phenomena of low sensitivity, high detection limit, and the like of the FID detector. Particularly in the application scene of testing non-methane total hydrocarbons, the national environmental protection standard HJ38-2017 gas chromatography for measuring non-methane total hydrocarbons and waste gas total hydrocarbons of fixed pollution sources requires methane as a standard gas, when testing unsaturated hydrocarbons and oxygenated hydrocarbons, the response of the unsaturated hydrocarbons and the oxygenated hydrocarbons with the same concentration of carbon on an FID detector is far lower than the response of the methane with the same concentration of carbon on the FID detector, so that the phenomenon of inaccurate test is caused when testing sample gas containing the unsaturated hydrocarbons and the oxygenated hydrocarbons by using a calibration curve made by the methane standard gas, and the phenomenon is not solved well at present.
SUMMERY OF THE UTILITY MODEL
For solving the not enough among the above-mentioned prior art scheme, the utility model provides a chromatographic analysis device that sensitivity is high, detection limit is low, the detection accuracy is high, the running cost is low.
The utility model aims at realizing through the following technical scheme:
the device comprises a chromatographic analysis device, a gas chromatography detector and a gas chromatography control system, wherein the chromatographic analysis device comprises a chromatographic column, an FID detector, a hydrogen pipeline, a sample gas pipeline and an air pipeline, and the FID detector comprises a shell and a combustion chamber; the FID detector further includes:
the reactor is arranged in the shell and is provided with an inlet and an outlet, the inlet is communicated with the hydrogen pipeline and the sample gas pipeline, and the outlet is communicated with the combustion chamber; the unsaturated hydrocarbon in the sample gas is catalyzed into saturated hydrocarbon by hydrogen and a catalyst in the reactor;
a heating unit for increasing a temperature within the reactor.
Compared with the prior art, the utility model discloses the beneficial effect who has does:
1. the detection limit is low;
the FID detector is internally provided with the catalytic conversion reactor, so that the unsaturated hydrocarbon and the oxygenated hydrocarbon are subjected to catalytic hydrogenation reaction and converted into saturated hydrocarbon, and the relative mass response factor is improved, so that the sensitivity of the FID detector, namely a chromatographic analysis device, is improved, and the detection limit is reduced;
2. the catalytic efficiency and the detection accuracy are high;
the first container with the tubular structure improves the contact reaction area of the sample gas and the catalyst, so that unsaturated hydrocarbons and oxygen-containing hydrocarbons are fully catalyzed and hydrogenated to generate saturated hydrocarbons, higher catalysis efficiency is ensured, and the detection accuracy of the unsaturated hydrocarbons and the oxygen-containing hydrocarbons is correspondingly improved;
3. the operation cost is low;
the hydrogen required by the conventional FID detector is effectively utilized, so that unsaturated hydrocarbons and oxygen-containing hydrocarbons are catalytically hydrogenated to generate saturated hydrocarbons under the action of the catalyst, no additional gas is required to be added, and the operation cost is effectively reduced.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only intended to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. In the figure:
FIG. 1 is a schematic diagram of a chromatography apparatus according to an embodiment of the present invention;
fig. 2 is a simplified structural diagram of an FID detector according to an embodiment of the present invention.
Detailed Description
Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or substitutions from these embodiments that will be within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.
Example 1:
fig. 1 schematically shows a schematic structural diagram of a chromatography apparatus according to an embodiment of the present invention, and as shown in fig. 1, the chromatography apparatus includes:
the device comprises a chromatographic column 21, a sample gas pipeline, a hydrogen pipeline and an air pipeline, wherein the chromatographic column is arranged on the sample gas pipeline; these components are all prior art in this field, and the detailed structure and operation are not described herein;
fig. 2 schematically shows a simplified structure of an FID detector according to an embodiment of the present invention, and as shown in fig. 2, the FID detector 31 includes:
the housing and combustion chamber 32; the housing having a top end outlet, the combustion chamber 32 being disposed within the housing;
a reactor 61-62, wherein the reactor 61-62 is arranged in the shell and is provided with an inlet and an outlet, the inlet is communicated with the hydrogen pipeline and the sample gas pipeline (provided with a sample gas and a carrier gas, the sample gas flows along the carrier), and the outlet is communicated with the combustion chamber; unsaturated hydrocarbons and oxygen-containing hydrocarbons in the sample gas are catalyzed into saturated hydrocarbons by hydrogen and a catalyst such as a nickel-based catalyst in the reactor;
a heating unit 71, such as an electric heater, for increasing the temperature inside the reactor.
In order to improve the efficiency of the hydrocatalytic reaction, further, the part of the reactor having the inlet is a first vessel 61, and the part having the outlet is a second vessel 62, which extends into the combustion chamber.
Example 2:
the utility model discloses an application example of chromatographic analysis device in unsaturated hydrocarbon detection according to embodiment 1.
In the application example, as shown in fig. 1-2, an EPC3, an enrichment tube 11 and a chromatographic column 21 are arranged on a sample gas pipeline in sequence; the EPC2 is arranged on the hydrogen pipeline; the air pipeline is provided with EPC 1;
the reactor comprises a first tubular vessel 61, in which the nickel-based catalyst is arranged, and a second tubular vessel 62; the first tubular container 61 has an inner diameter larger than that of the second tubular container 62, the second tubular container 62 made of stainless steel has an outer diameter of 1/16 inches, and the first tubular container 61 has an inner diameter of 1.7 mm; the electric heater 71 heats the temperature in the first tubular container 61 to not less than 300 ℃; the sample gas inlet amount is 0.1ml, and the hydrogen flow rate is 40 ml/min; the electric heater 71 is wound around the outer edge of the first container; a thermocouple 72 is disposed within the housing for obtaining the temperature of the first vessel.
The chromatographic analysis device for unsaturated hydrocarbons of the present example was operated in the following manner:
hydrogen and air enter a combustion chamber in the FID detector to form stable combustion;
the carrier gas carries the sample gas into the first container, unsaturated hydrocarbon and oxygen-containing hydrocarbon in the sample gas are heated, and hydrogenation catalysis is carried out under the action of the catalyst to produce saturated hydrocarbon;
the saturated hydrocarbons enter the second vessel and are then ionized at the high temperature of the combustion chamber.
Claims (5)
1. The device comprises a chromatographic analysis device, a gas chromatography detector and a gas chromatography control system, wherein the chromatographic analysis device comprises a chromatographic column, an FID detector, a hydrogen pipeline, a sample gas pipeline and an air pipeline, and the FID detector comprises a shell and a combustion chamber; the method is characterized in that: the FID detector further includes:
the reactor is arranged in the shell and is provided with an inlet and an outlet, the inlet is communicated with the hydrogen pipeline and the sample gas pipeline, and the outlet is communicated with the combustion chamber; the unsaturated hydrocarbon in the sample gas is catalyzed into saturated hydrocarbon by hydrogen and a catalyst in the reactor;
a heating unit for increasing a temperature within the reactor.
2. The chromatography apparatus according to claim 1, characterized in that: the portion of the reactor having the inlet is a first vessel and the portion having the outlet is a second vessel, the second vessel extending into the combustion chamber.
3. The chromatography apparatus according to claim 2, characterized in that: the first vessel has an inner diameter greater than an inner diameter of the second vessel, and a catalyst is disposed within the first vessel.
4. The chromatography apparatus according to claim 2, characterized in that: the first container and/or the second container are tubular structures.
5. The chromatography apparatus according to claim 1, characterized in that: the catalyst is a nickel-based catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020019666.2U CN212008446U (en) | 2020-01-06 | 2020-01-06 | Chromatographic analysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020019666.2U CN212008446U (en) | 2020-01-06 | 2020-01-06 | Chromatographic analysis device |
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| CN212008446U true CN212008446U (en) | 2020-11-24 |
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| CN202020019666.2U Active CN212008446U (en) | 2020-01-06 | 2020-01-06 | Chromatographic analysis device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT526265A1 (en) * | 2022-10-03 | 2023-11-15 | Avl List Gmbh | Device for preparing a gaseous medium |
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2020
- 2020-01-06 CN CN202020019666.2U patent/CN212008446U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT526265A1 (en) * | 2022-10-03 | 2023-11-15 | Avl List Gmbh | Device for preparing a gaseous medium |
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