CN217305042U

CN217305042U - Integrated double-FID detection device

Info

Publication number: CN217305042U
Application number: CN202123377140.5U
Authority: CN
Inventors: 杨开贵; 张亮; 蔡芬芬; 闫现所; 梅小强; 刘朋刚; 朱琪琪
Original assignee: Qingdao Minghua Electronic Instrument Co ltd
Current assignee: Qingdao Minghua Electronic Instrument Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-26
Anticipated expiration: 2031-12-30

Abstract

The utility model relates to a FID detection area, especially a two FID detection device of integrated form. The system comprises a total hydrocarbon FID measuring mechanism, a methane FID measuring mechanism, an FID upper cover and an FID base, wherein the total hydrocarbon FID measuring mechanism and the methane FID measuring mechanism are arranged in the FID upper cover and the FID base; be equipped with the several air flue in the FID base, the air flue respectively with air intlet, sample gas import, hydrogen access connection, wherein air intlet passes through the air flue and the inlet channel intercommunication of ignition air cock, sample gas import, hydrogen import respectively through the air flue and the inlet channel intercommunication of FID base bottom, be equipped with inlet channel in the connection air cock seat, inlet channel in the FID base, the inlet channel in the connection air cock seat and the inlet channel in the ignition air cock all are the connected state. The detection device meets the requirements of uniformity and simultaneity of two FIDs in detection at the same temperature, effectively reduces detection result errors, and has a simple internal structure and a small volume.

Description

Integrated double-FID detection device

Technical Field

The utility model relates to a FID detection area, especially a two FID detection device of integrated form.

Background

The hydrogen Flame Ionization Detector (FID) is typically a destructive, mass type detector. The FID detector uses a flame generated by the combustion of hydrogen and air as an energy source, and when organic compounds enter the flame, each carbon atom in the hydrocarbon compounds combusted in the flame is quantitatively converted into methane, which is the most basic, common response unit, and undergoes a chemical reaction to generate hydronium ions and electrons (redox reaction). Under the action of high-voltage electric field, hydronium ions and electrons move to collector and polarizing electrode respectively to form ion flow, which is amplified by high resistance to become electric signal proportional to the amount of organic compound entering flame, so obtaining the concentration of total hydrocarbon (in terms of carbon).

At present, a single FID detector is mostly adopted in the market, one path of sample gas firstly directly enters the FID detector to measure the content of total hydrocarbons, the other path of sample gas is separated from non-methane through a chromatographic column or a catalyst to measure the content of methane, and the difference between the two paths of sample gas is used for obtaining the content of non-methane total hydrocarbons. Therefore, two problems exist, namely, the two paths of sample gases are not the same gas, and the concentration possibly deviates, so that the measured value deviates; secondly, the real-time performance of the data is deteriorated due to the time-sharing detection, and the measurement period of most single FID detectors is counted to be 30 seconds to 3 minutes.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned defect that prior art exists, provide a two FID detection device of integrated form, it has satisfied uniformity and simultaneity that two tunnel FID detected time measuring under the prerequisite of same temperature, effectively reduces the testing result error, and inner structure is simple to it is small.

The technical scheme of the utility model is that: an integrated double-FID detection device comprises a total hydrocarbon FID measurement mechanism, a methane FID measurement mechanism, an FID upper cover and an FID base, wherein the FID upper cover is positioned above the FID base, the FID upper cover is fixed at the top of the FID base, and the total hydrocarbon FID measurement mechanism and the methane FID measurement mechanism are arranged in the FID upper cover and the FID base;

the total hydrocarbon FID measuring mechanism and the methane FID measuring mechanism comprise exhaust nozzles, ignition nozzle seats, signal capturing parts, ignition nozzles and connecting nozzle seats, the exhaust nozzles are fixed on the top surface of an FID upper cover, the ignition nozzle seats are fixed on the side surfaces of the FID upper cover, cavities are formed in the FID upper cover and the FID base, the signal capturing parts, the ignition nozzles and the connecting nozzle seats are sequentially arranged in the cavities from top to bottom, a connecting pipe is fixed at the top of the signal capturing parts, the top of the connecting pipe is fixedly connected with an upper side plate, the bottom of the connecting pipe is fixedly connected with a lower side plate, the upper side plate and the lower side plate are fixed in the cavities of the FID upper cover, the signal capturing parts are cylindrical, the ignition nozzles are arranged right below the signal capturing parts, the ignition nozzles are placed on the connecting nozzle seats, and the connecting nozzle seats are located at the bottoms of the cavities of the FID base;

be equipped with the several air flue in the FID base, the air flue respectively with air intlet, sample gas import, hydrogen access connection, wherein air intlet passes through the air flue and the inlet channel intercommunication of ignition air cock, and sample gas import, hydrogen import are equipped with inlet channel in the connection air cock seat through the inlet channel intercommunication of air flue and FID base bottom respectively, inlet channel in the FID base, the inlet channel in the connection air cock seat and the inlet channel in the ignition air cock all are the connected state.

The utility model discloses in, with the outside and the upside probe contact of signal entrapment portion fixed connection's connecting pipe, the outside and the downside probe contact of ignition air cock, the outside cover of upside probe has last contact pin sleeve pipe, and the outside cover of downside probe has lower contact pin sleeve pipe, goes up contact pin sleeve pipe and is equipped with the outer pillar respectively with lower contact pin sheathed tube outside, and the outside of outer pillar is equipped with the fixed plate, is equipped with the hole on the fixed plate, and the hole on the fixed plate passes the outer pillar, the side fixed connection of fixed plate and FID upper cover.

The utility model has the advantages that:

(1) the uniformity and the simultaneity of two FIDs in detection at the same temperature are met, and the detection fruit set error is effectively reduced;

(2) the device has the advantages of simple internal structure, low manufacturing cost, simple assembly and small volume, saves the internal space of the instrument, is convenient to maintain and improves the practicability of the instrument.

Drawings

Fig. 1 is an overall appearance diagram of the present invention;

fig. 2 is a schematic front view of the present invention;

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

fig. 4 is a schematic diagram of the explosion structure of the present invention.

In the figure: 1 total hydrocarbon FID measurement mechanism; 101 an air inlet i; 102 a sample gas inlet I; 103 hydrogen inlet I; 201 air inlet II; 202, a sample gas inlet II; 203 hydrogen inlet II; 2 methane FID measurement mechanism; 3, an exhaust nozzle; 4, covering the FID; 5 igniting the air nozzle seat; 6, an upper side plate; 7, a lower side plate; 8 a signal collection unit; 9, an ignition nozzle; 10 connecting an air nozzle seat; 11FID mount; 12 fixing the plate; 13 lower contact pin sleeve; 14 lower side pins; 15 inserting pins at the upper side; 16, inserting a pin sleeve on the pin; 17, an outer protective pipe; 18 a sheath; 19 connecting the tubes.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below.

As shown in FIG. 1 and FIG. 2, two FID detection device of integrated form include total hydrocarbon FID measuring mechanism 1 and methane FID measuring mechanism 2, FID upper cover 4 and FID base 11, FID upper cover 4 is located the top of FID base 11, FID upper cover 4 passes through the bolt fastening at the top of FID base 11. The total hydrocarbon FID measuring mechanism 1 and the methane FID measuring mechanism 2 are both provided in the FID upper cover 4 and the FID base 11.

As shown in fig. 4, the total hydrocarbon FID measuring means 1 and the methane FID measuring means 2 have the same internal structure, and the internal structure of the methane FID measuring means 2 is described in detail in this embodiment. As shown in fig. 3, the methane FID measuring mechanism 2 includes an exhaust nozzle 3, an ignition nozzle seat 5, a signal capturing part 8, an ignition nozzle 9 and a connection nozzle seat 10, and the exhaust nozzle 3 is fixed on the top surface of the FID upper cover 4 to perform an exhaust function. The ignition air nozzle seat 5 is fixed on the side surface of the FID upper cover, and the heating ignition of the heating wire is realized through the ignition air nozzle seat 5, so that the ignition air nozzle 9 is ignited. Cavities are arranged in the FID upper cover 4 and the FID base 11, and the signal trapping part 8, the ignition air nozzle 9 and the connecting air nozzle seat 10 are sequentially arranged in the cavities from top to bottom. The top of signal entrapment portion 8 is fixed with connecting pipe 19, the top and the last curb plate 6 fixed connection of connecting pipe 19, the bottom and the lower curb plate 7 fixed connection of connecting pipe 19, go up curb plate 6 and lower curb plate 7 and all fix in the cavity of FID upper cover 4, go up curb plate 6 and lower curb plate 7 and played insulating effect, that is to say, signal entrapment portion 8 has realized through last curb plate 6 and lower curb plate 7 and has been connected with the insulation between FID upper cover 4. The signal trapping part 8 is cylindrical, an ignition air nozzle 9 is arranged under the signal trapping part 8, the ignition air nozzle 9 is placed on a connecting air nozzle seat 10, and the connecting air nozzle seat 10 is located at the bottom of a cavity of the FID base 11. A plurality of air passages are arranged in the FID base 11 and are respectively connected with an air inlet II 201, a sample gas inlet II 202 and a hydrogen inlet II 203. Wherein the air inlet II 201 is communicated with an air inlet channel of the ignition air faucet 9 through an air passage. Sample gas import II 202, hydrogen import II 203 also are equipped with inlet channel in connecting air cock seat 10 through the inlet channel intercommunication of air flue and FID base 11 bottom respectively, inlet channel in FID base, the inlet channel in connecting air cock seat 10 and the inlet channel in the air cock 9 of igniteing all are the connected state. After the sample gas and the hydrogen gas enter the FID base 11, the sample gas and the hydrogen gas enter the ignition air faucet 9 through the air inlet channel in the connecting air faucet 10, the air, the sample gas and the hydrogen gas are mixed in the ignition air faucet 9 and ignited and combusted, and in the combustion process, the signal trapping part 8 can trap electric ions generated in the sample gas combustion process. The sample gas in the methane FID detection mechanism is to-be-detected gas catalyzed by a non-methane catalyst, namely only methane gas is reserved; the sample gas in the total hydrocarbon FID detection mechanism is the gas to be detected, namely the total hydrocarbon is detected.

In the present application, the outside of the connection tube 19 fixedly connected to the signal collection unit 8 is in contact with the upper probe 15, and the outside of the ignition nozzle 9 is in contact with the lower probe 14. The outside cover of upside probe 15 has last contact pin sleeve pipe 16, the outside cover of downside probe 15 has lower contact pin sleeve pipe 13, the outside of going up contact pin sleeve pipe 16 and lower contact pin sleeve pipe 13 is equipped with outer pillar 18 respectively, in order to realize being connected between outer pillar 18 and the FID upper cover 4, the outside of outer pillar 18 is equipped with fixed plate 12, be equipped with the hole on the fixed plate 12, outer pillar 18 is passed in the hole on the fixed plate 12, fixed plate 12 passes through the side fixed connection of bolt and FID upper cover 4, thereby the rigidity of upside probe 15 and downside probe 14 has been realized. A high voltage electric field is applied to the ignition nozzle 9 through the lower probe 14, so that an electric field is formed between the ignition nozzle 9 and the signal trap 8. The ionized ions trapped by the signal trapping part are transmitted by the upper probe 15, and after the ionized ions are transmitted to the signal plate for amplification, a corresponding signal can be obtained, so that the methane FID measuring mechanism 2 can obtain the methane concentration. Similarly, the total hydrocarbon FID measurement mechanism can measure the total hydrocarbon concentration.

When the device works, one path of sample gas directly enters a total hydrocarbon FID measuring mechanism 1 to measure the concentration of the total hydrocarbon; the other path of sample gas firstly passes through the catalytic module and then enters the methane FID measuring mechanism 2 to measure the methane concentration, so that the uniformity and the simultaneity of two paths of FIDs during detection at the same temperature are met, and the error of the detection result is effectively reduced.

It is right above the utility model provides a two FID detection device of integrated form have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a two FID detection device of integrated form which characterized in that: the device comprises a total hydrocarbon FID measuring mechanism (1), a methane FID measuring mechanism (2), an FID upper cover (4) and an FID base (11), wherein the FID upper cover (4) is positioned above the FID base (11), the FID upper cover (4) is fixed at the top of the FID base (11), and the total hydrocarbon FID measuring mechanism (1) and the methane FID measuring mechanism (2) are arranged in the FID upper cover (4) and the FID base (11);

the total hydrocarbon FID measuring mechanism (1) and the methane FID measuring mechanism (2) comprise exhaust nozzles (3), ignition air nozzle seats (5), a signal trapping part (8), ignition air nozzles (9) and connecting air nozzle seats (10), the exhaust nozzles (3) are fixed on the top surface of an FID upper cover (4), the ignition air nozzle seats (5) are fixed on the side surface of the FID upper cover, cavities are arranged in the FID upper cover (4) and the FID base (11), the signal trapping part (8), the ignition air nozzles (9) and the connecting air nozzle seats (10) are sequentially arranged in the cavities from top to bottom, a connecting pipe (19) is fixed at the top of the signal trapping part (8), the top of the connecting pipe (19) is fixedly connected with an upper side plate (6), the bottom of the connecting pipe (19) is fixedly connected with a lower side plate (7), the upper side plate (6) and the lower side plate (7) are fixed in the cavities of the FID upper cover (4), and the signal trapping part (8) is in a cylindrical shape, an ignition air nozzle (9) is arranged right below the signal trapping part (8), the ignition air nozzle (9) is placed on a connecting air nozzle seat (10), and the connecting air nozzle seat (10) is positioned at the bottom of a cavity of the FID base (11);

be equipped with the several air flue in FID base (11), the air flue respectively with air intlet, sample gas import, hydrogen access connection, wherein air intlet passes through the air flue and the inlet channel intercommunication of ignition air cock, sample gas import, hydrogen import respectively through the inlet channel intercommunication of air flue and FID base (11) bottom, be equipped with inlet channel in connecting air cock seat (10), inlet channel in the FID base, the inlet channel in the connecting air cock seat (10) and the inlet channel in ignition air cock (9) all are the connected state.

2. The integrated dual FID detection apparatus of claim 1, wherein: the outside and upside probe (15) contact of connecting pipe (19) with signal entrapment portion (8) fixed connection, the outside and downside probe (14) contact of ignition air cock (9), the outside cover of upside probe (15) has last contact pin sleeve pipe (16), the outside cover of downside probe (14) has down contact pin sleeve pipe (13), the outside of going up contact pin sleeve pipe (16) and lower contact pin sleeve pipe (13) is equipped with outer pillar (18) respectively, the outside of outer pillar (18) is equipped with fixed plate (12), be equipped with the hole on fixed plate (12), outer pillar (18) are passed in the hole on fixed plate (12), the side fixed connection of fixed plate (12) and FID upper cover (4).