CN202013345U

CN202013345U - FID (Flame Ionization Detector)

Info

Publication number: CN202013345U
Application number: CN2011200679156U
Authority: CN
Inventors: 赵国宏; 笪宇星
Original assignee: SHANGHAI TECHCOMP INSTRUMENT Ltd
Current assignee: SHANGHAI TECHCOMP INSTRUMENT Ltd
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2011-10-19
Anticipated expiration: 2021-03-16

Abstract

The utility model discloses a FID (Flame Ionization Detector) which comprises an aluminum base, a heating rod, a nozzle substrate, a gas inlet pipe, a combustion chamber and a nozzle, wherein the aluminum base is positioned at the bottom of the FID, the heating rod is positioned inside the aluminum base, the nozzle substrate penetrates through the aluminum base from top to bottom, the gas inlet pipe is inserted into the nozzle substrate from bottom to top, the combustion chamber is arranged above the nozzle substrate, the nozzle is arranged inside the combustion chamber, the upper part of the nozzle substrate is provided with a combined gas cavity which is communicated with the nozzle and the gas inlet pipe, the combined gas cavity is provided with a first gas inlet, the combustion chamber is provided with a second gas inlet, a cavity is arranged between the aluminum base and a section of the nozzle substrate, the section is matched with the aluminum base, the cavity is provided with a coil pipe which is coiled on the nozzle substrate, and the gas outlet end of the coil pipe is communicated with the gas inlet pipe. The utility model has the characteristic that with the adoption of the FID, the gas transformation heating and the gas detection heating are integrated into a whole, and two types of heating can be realized only by using one heating resource; besides, the utility model has the advantages that the FID has a compact structure and is convenient to detect and operate.

Description

Fid detector

Technical field

The utility model belongs to the detecting instrument technical field, relates in particular to a kind of fid detector.

Background technology

FID (flame ionization detector flame ionization detector) detecting device is widely used in volatile hydrocarbon and many detections that contains the charing compound, needs when detecting and will be heated to certain temperature condition by detecting device.And some gas is directly to detect with fid detector in addition, as CO ₂, CO gas, must formerly they be changed into CH ₄, conversion is to carry out in the reburner of heating.And in the prior art, fid detector separates with reburner.Therefore, the heating of fid detector and the heating of reburner will be carried out at twice, and this just causes the detection of some gas need use fid detector and two individual components of reburner, and is more loaded down with trivial details in the operation, and all needs to utilize the energy twice, also uneconomical.

The utility model content

Technical problem to be solved in the utility model provides a kind of compact conformation, the fid detector that is combined into one is heated in gas conversion heating and gas detection, to overcome the deficiency that prior art exists.

In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of fid detector comprises the aluminium seat that is positioned at the bottom, is positioned at the heating rod of aluminium seat, passes the nozzle base of aluminium seat from the top down, inserts the draft tube of nozzle base from top to bottom, is arranged on the firing chamber above the nozzle base; Be arranged on the nozzle in the firing chamber, described nozzle base top has the mixed air cavity that is communicated with nozzle and draft tube, described mixed air cavity has first air intake opening, described firing chamber has second air intake opening, it is characterized in that: have cavity between section that described nozzle base and aluminium seat cooperate and the aluminium seat, have the coil pipe that is coiled on the nozzle base in the described cavity, described coil pipe outlet side communicates with draft tube.

In the utility model, by the coil pipe that is coiled on the nozzle base is set in the aluminium seat, heating rod just can be simultaneously to nozzle base heating and coil pipe heating like this, and coil pipe is used to realize that gas transforms, be equivalent to reburner, promptly realized simultaneously FID heating and reburner heating.

Therefore, fid detector of the present utility model has gas is transformed the characteristics that heating and gas detection heating are combined into one, and only uses two kinds of heating of a heating source realization, has compact conformation, makes things convenient for the advantage of detecting operation.

Description of drawings

Be elaborated below in conjunction with the drawings and specific embodiments the utility model:

Fig. 1 is a structure cut-open view of the present utility model;

Among the figure: 100-aluminium seat, 200-heating rod, 300-nozzle base, 301-mixed air cavity, 400-draft tube, the 500-nozzle, 600-firing chamber, 601-first air intake opening, 602-air flue, 603-second air intake opening, the 604-air flue, 605-lighter, 700-coil pipe, 800-cavity, 900-temperature sensor.

Embodiment

As shown in Figure 1, the utility model is the improvement to existing fid detector substructure, and improvements are for heating the structure that is combined into one with reburner heating and fid detector.Particularly, improve FID detection bottom, back and comprise aluminium seat 100, heating rod 200, nozzle base 300, draft tube 400, nozzle 500, firing chamber 600, coil pipe 700.

Wherein, heating rod 200 is arranged in aluminium seat 100, and nozzle base 300 is from the last aluminium seat 100 that passes up and down, and draft tube 400 is inserted in the nozzle base 300 equally from top to bottom, and firing chamber 600 is positioned at the top of nozzle base 600, and nozzle 500 is arranged in firing chamber 600.Have the nozzle 500 of connection and the mixed air cavity 301 of draft tube 400 in nozzle base 300 upper ends.First air intake opening 601 also is installed on this nozzle base 300, and this first air intake opening 601 is communicated in the mixed air cavity 301 by air flue 602.In addition, nozzle base 300 upper end sidepieces also are equipped with second air intake opening 603, and this second air intake opening 603 is communicated to burnup chamber 600 by an air flue 604 equally.

Form a cavity 800 between section that nozzle base 300 and aluminium seat 100 cooperate and the aluminium seat 100, coil pipe 700 is arranged in this cavity 800, is coiled on the nozzle base 300.In the coil pipe 700 catalyzer is housed.The outlet side of coil pipe 700 is communicated with draft tube 400.

In order better heating-up temperature to be controlled, aluminium seat 100 is positioned at heating rod 200 and also has temperature sensor 900.Utilize this temperature sensor 900 can monitor hot temperature, thus the control heating-up temperature.

More than be exactly the fid detector after improving, its course of work is as follows, to detect CO ₂, CO is example:

The conduction of heating rod 200 by aluminium seat 100 simultaneously to coil pipe 700, nozzle base 300 with and interior draft tube 400 heat.

At first, with CO ₂, CO and H ₂Mixed gas feed in the coil pipe 700, change into CH4 at heating state and under coil pipe 700 inner catalyst catalysis, the CH that obtains after transforming then ₄From coil pipe 700, come out to enter in the draft tube 400, and from first air intake opening 601, feed H ₂With the CH that feeds from draft tube 400 ₄Mix in mixed air cavity 301 under heating state, at last from nozzle 500 ejections, and second air intake opening, 603 bubbling airs enter in the firing chamber 600, are CH ₄And H ₂Mixed gas combustion-supporting, utilize lighter 605 can light mixed gas, thereby realize testing goal.

By foregoing detailed description, as can be seen, fid detector of the present utility model has gas is transformed the characteristics that heating and gas detection heating are combined into one, and only uses two kinds of heating of a heating source realization, has compact conformation, makes things convenient for the advantage of detecting operation.

But, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims

1. fid detector comprises the aluminium seat that is positioned at the bottom, is positioned at the heating rod of aluminium seat, passes the nozzle base of aluminium seat from the top down, inserts the draft tube of nozzle base from top to bottom, is arranged on the firing chamber above the nozzle base; Be arranged on the nozzle in the firing chamber, described nozzle base top has the mixed air cavity that is communicated with nozzle and draft tube, described mixed air cavity has first air intake opening, described firing chamber has second air intake opening, it is characterized in that: have cavity between section that described nozzle base and aluminium seat cooperate and the aluminium seat, have the coil pipe that is coiled on the nozzle base in the described cavity, described coil pipe outlet side communicates with draft tube.

2. fid detector according to claim 1 is characterized in that: in the described coil pipe catalyzer is housed.