阅读说明：本技术 一种带有加氢效果的氢火焰离子化检测器 (Hydrogen flame ionization detector with hydrogenation effect ) 是由 张永智 杨东才 赵雪 崔贺民 于 2020-06-16 设计创作，主要内容包括：本发明公开了一种带有加氢效果的氢火焰离子化检测器,包括气体分离柱、加氢催化剂、石英棉、喷嘴、极化极、收集极、金属衬管、壳体和固定底座,所述固定底座上面安装有壳体,在壳体内的上部设有收集极,中部设有极化极,下部设有喷嘴,所述喷嘴位于固定底座上面,所述固定底座中开设有与喷嘴腔体连通的气体通孔,所述气体通孔中设有金属衬管,在金属衬管上部填充有加氢催化剂,所述加氢催化剂顶部和底部分别连接有石英棉,所述气体分离柱伸入金属衬管下部。本申请氢火焰离子化检测器能检测出气体中低浓度的一氧化碳与二氧化碳,并且可以避免更换价格昂贵的氦离子化检测器,同时也不需要添加转化炉和其温控设备。(The invention discloses a hydrogen flame ionization detector with a hydrogenation effect, which comprises a gas separation column, a hydrogenation catalyst, quartz wool, a nozzle, a polarization electrode, a collector, a metal liner tube, a shell and a fixed base, wherein the shell is arranged on the fixed base, the collector is arranged at the upper part in the shell, the polarization electrode is arranged at the middle part, the nozzle is arranged at the lower part in the shell, the nozzle is positioned on the fixed base, a gas through hole communicated with a nozzle cavity is formed in the fixed base, the metal liner tube is arranged in the gas through hole, the hydrogenation catalyst is filled at the upper part of the metal liner tube, the top and the bottom of the hydrogenation catalyst are respectively connected with the quartz wool, and the gas separation column extends into the lower part of the metal. The hydrogen flame ionization detector can detect carbon monoxide and carbon dioxide with low concentration in gas, can avoid replacing the expensive helium ionization detector, and simultaneously does not need to add a converter and temperature control equipment thereof.)

1. The utility model provides a hydrogen flame ionization detector with hydrogenation effect, includes gas separation post, hydrogenation catalyst, quartz wool, nozzle, polarize utmost point, collector, metal liner pipe, casing and unable adjustment base, install the casing above the unable adjustment base, upper portion in the casing is equipped with the collector, and the middle part is equipped with the polarize utmost point, and the lower part is equipped with the nozzle, the nozzle is located above the unable adjustment base, its characterized in that, set up the gas through-hole with nozzle cavity intercommunication in the unable adjustment base, be equipped with the metal liner pipe in the gas through-hole, it has the hydrogenation catalyst to fill on metal liner pipe upper portion, hydrogenation catalyst top and bottom are connected with the quartz wool respectively, the gas separation post stretches into metal liner pipe lower part.

2. The hydrogen flame ionization detector with hydrogenation effect as claimed in claim 1, wherein the gas separation column is a capillary column, the capillary column extends into the metal liner tube and is located below the quartz wool at the bottom, the metal liner tube not located in the fixed base is connected with the hydrogen gas inlet pipeline, and the carrier gas and the sample gas are introduced into the capillary column.

3. The hydrogen flame ionization detector with hydrogenation effect as claimed in claim 1, wherein the gas separation column is a stainless steel packed column, the stainless steel packed column extends into the metal liner tube and is located below the quartz wool at the bottom, and hydrogen gas and sample gas are introduced into the stainless steel packed column.

4. The detector of claim 1, wherein the fixed base comprises a horizontal base and a vertical base which are vertically connected, and the cylinder and the nozzle are connected to the horizontal base.

5. The hydrogen flame ionization detector with hydrogenation effect as claimed in claim 4, wherein a nitrogen gas inlet pipeline is connected to one side of the top of the vertical seat, and the nitrogen gas inlet pipeline is communicated with the gas through hole.

6. The detector of claim 1, wherein the polarizer is located directly above the nozzle, and the collector is located directly above the polarizer.

7. The detector of claim 1, wherein an air inlet line is connected to one side of the bottom of the housing, and an exhaust line is connected to the top of the housing.

8. The hydrogen flame ionization detector with hydrogenation effect of claim 1, wherein the quartz wool at the top and bottom of the hydrogenation catalyst is silanized quartz wool, and the outer wall of the silanized quartz wool is tightly attached to the inner wall of the metal liner tube.

Technical Field

The invention relates to the technical field of gas chromatographs, in particular to a hydrogen flame ionization detector of a gas chromatograph.

Background

The hydrogen Flame Ionization Detector (FID) is a detector widely applied in the existing gas chromatograph, and has the advantages of high sensitivity, low detection limit and the like. In gas detection, it is often desirable to detect low concentrations of carbon monoxide and carbon dioxide in the gas. Since the existing FID cannot detect these two substances, the common solution is to replace the FID with a helium ionization detector, or to add a reformer and reformer temperature control device. Helium ionization detectors are expensive, typically in the tens of thousands of dollars. The addition of the converter increases the dead volume of the sample during analysis, and affects the accuracy of the analysis.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a hydrogen flame ionization detector with hydrogenation effect, which can detect low concentrations of carbon monoxide and carbon dioxide in a gas, and can avoid replacing an expensive helium ionization detector without adding a reformer and a temperature control device thereof.

In order to achieve the purpose, the technical scheme of the application is as follows: the utility model provides a hydrogen flame ionization detector with hydrogenation effect, includes gas separation post, hydrogenation catalyst, quartz wool, nozzle, polarize utmost point, collector, metal liner pipe, casing and unable adjustment base, install the casing above the unable adjustment base, upper portion in the casing is equipped with the collector, and the middle part is equipped with the polarize utmost point, and the lower part is equipped with the nozzle, the nozzle is located above the unable adjustment base, open the gas through-hole who communicates with the nozzle cavity in the unable adjustment base, be equipped with the metal liner pipe in the gas through-hole, it has the hydrogenation catalyst to pack on metal liner pipe upper portion, hydrogenation catalyst top and bottom are connected with the quartz wool respectively, the gas separation post stretches into metal liner pipe lower part.

Further, the gas separation column is a capillary column, the capillary column extends into the metal liner tube and is positioned below the quartz wool at the bottom, the metal liner tube which is not positioned in the fixed base is connected with the hydrogen inlet pipeline, and carrier gas and sample gas are introduced into the capillary column, wherein the carrier gas is inert gas.

Further, the gas separation column is a stainless steel packed column, the stainless steel packed column extends into the metal liner tube and is positioned below the quartz wool at the bottom, and hydrogen and sample gas are introduced into the stainless steel packed column.

Furthermore, the fixed base comprises a horizontal seat and a vertical seat which are vertically connected, and a cylinder and a nozzle are connected on the horizontal seat.

Furthermore, one side of the top of the vertical seat is connected with a nitrogen inlet pipeline which is communicated with the gas through hole.

Furthermore, the polarized electrode is positioned right above the nozzle, and the collector is positioned right above the polarized electrode.

Furthermore, one side of the bottom of the shell is connected with an air inlet pipeline, and the top of the shell is connected with an exhaust pipeline.

Furthermore, the quartz wool at the top and the bottom of the hydrogenation catalyst is silanized quartz wool, and the outer wall of the silanized quartz wool is tightly attached to the inner wall of the metal liner tube.

Due to the adoption of the technical scheme, the invention can obtain the following technical effects: this application hydrogen flame ionization detector, simple structure, easy maintenance change, saving manufacturing cost can detect out the carbon monoxide and the carbon dioxide of low concentration in the gas to can avoid changing the helium ionization detector that the price is expensive, also need not add the reborner and its temperature control equipment simultaneously, reduce the dead volume, improve the accuracy of analysis.

Drawings

FIG. 1 is a schematic view showing the structure of a hydrogen flame ionization detector in example 1;

FIG. 2 is a schematic view showing the structure of a hydrogen flame ionization detector according to example 2;

the sequence numbers in the figures illustrate: 1. the device comprises a collector, 2, a shell, 3, a polarizing electrode, 4, a nozzle, 5, silanized quartz cotton, 6, a hydrogenation catalyst, 7, air, 8, nitrogen, 9, a fixed base, 10, a metal liner tube, 11, hydrogen, 12, a stainless steel packed column, 13, a capillary column, 14 and a direct current power supply.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific examples: the present application is further described by taking this as an example.