CN201527420U

CN201527420U - TOC analytical equipment

Info

Publication number: CN201527420U
Application number: CN2009201931217U
Authority: CN
Inventors: 项光宏; 唐小燕
Original assignee: Focused Photonics Hangzhou Inc
Current assignee: Hangzhou Juguang Environmental Protection Technology Co.,Ltd.; Focused Photonics Hangzhou Inc
Priority date: 2009-08-20
Filing date: 2009-08-20
Publication date: 2010-07-14
Anticipated expiration: 2019-08-20

Abstract

The utility model relates to TOC analytical equipment. The equipment comprises a combustion tube, an accelerant, and a detecting unit, and is characterized in that the analytical equipment further comprises a heating unit and a temperature controlled unit, wherein the heating unit comprises an excitation coil, a magnetic-conductive carrier, and a high-frequency heating circuit, the excitation coil is arranged on the periphery of the combustion tube and is connected with the high-frequency heating circuit, the magnetic-conductive carrier is arranged inside the combustion tube, the accelerant is attached on the magnetic-conductive carrier, the temperature controlled unit comprises a temperature sensor and a control module, and the temperature sensor, the control module, and the high-frequency heating circuit are connected in sequence. The equipment has such advantages of quick speed of temperature increment, good heating effect, small heat depletion, saved resources, and miniaturization.

Description

A kind of TOC analytical equipment

Technical field

The utility model relates to a kind of TOC analytical equipment.

Background technology

High-temperature combustion method TOC (total organic carbon) analytical technology relates to the catalytic combustion of sample.

At present, general way is by heating wire ecto-entad heating flame pipe, and as shown in Figure 1, concrete heat protocol is: quartz ampoule 10 is as flame tube, and graininess ceramic monolith 30, attached catalyst on ceramic monolith 30 are placed in inside.Heating wire 20 is around the outside of quartz ampoule 10, and thermofin 40 is wrapped in the outside of quartz ampoule 10 and heating wire 20.When work, heating wire 20 heatings, and, pass to the inner space of quartz ampoule 10 again with heat transferred quartz ampoule 10, quartz ampoule 10 temperature inside are risen.By FEEDBACK CONTROL, make temperature stabilization in the quartz ampoule 10 at target temperature.Fluid sample and carrier gas feed flame tube, realize vaporization and catalytic combustion to fluid sample in the flame tube.By the carbon dioxide that analytic combustion generates, obtain the content of TOC in the fluid sample.

Be the loss avoid heat and the safety that guarantees the engineering staff, be wrapped with thermofin in the external packets of heating wire.

Heating wire ecto-entad heating flame pipe can be realized vaporization and catalytic combustion to fluid sample in the flame tube effectively, but following some deficiency is also arranged:

1, adopt heating wire heating flame pipe, the heat ecto-entad transmits, and needs could arrive catalyzer through multiple medium heat conduction, and programming rate is slow;

Heat conduction efficiency was low when 2, heat transmitted from outside to inside, and heat power consumption is big, brought the wasting of resources;

3, in the process of heating wire heating flame pipe, heating wire is in the condition of high temperature always, and the fusing fault takes place easily, and the life-span is shorter;

4, the very thick insulating of flame tube outside need parcel one deck makes electrothermal furnace bulky, is unfavorable for instrument miniaturization.

The utility model content

In order to solve above-mentioned deficiency of the prior art, the utility model provides the TOC that a kind of programming rate is fast, heat power consumption is low, volume is little analytical equipment.

For solving the problems of the technologies described above, the utility model adopts following technical scheme:

A kind of TOC analytical equipment comprises flame tube, catalyzer, detecting unit, also comprises heating unit and temperature conditioning unit;

Described heating unit comprises field coil, magnetic conduction carrier and high-frequency heating circuit; Field coil is arranged on the periphery of flame tube, and connects the high-frequency heating circuit; The magnetic conduction carrier is arranged on the inside of flame tube; Described catalyzer is attached on the described magnetic conduction carrier;

Described temperature conditioning unit comprises temperature sensor, control module, and temperature sensor, control module and high-frequency heating circuit are connected successively.

As preferably, described magnetic conduction carrier is graininess or netted or vesicular.

Further, described flame tube outer wrap thermofin.

As preferably, described field coil is arranged on the outside of thermofin.

The utility model compared with prior art has following beneficial effect:

1, adopt the induction current heating technique, directly the magnetic conduction carrier in the heating flame pipe makes the interior programming rate of flame tube fast;

2, adopt the mode that directly heats in flame tube, without other medium conduction heat, thermal losses is little, thermal efficiency height;

3, owing to be in the inner heating of flame tube; flame tube self can play certain heat-insulation and heat-preservation effect; only need use thin thermofin just can realize the heat-insulation and heat-preservation of high temperature position in addition; reduce the loss of heat in the flame tube; also effectively reduce simultaneously the fuel element hull-skin temperature; the engineering operating personnel are played the safeguard protection effect, also reduced the volume of device simultaneously, be easy to realize the miniaturization of analytical equipment.

Description of drawings

Fig. 1 is a TOC analytical equipment synoptic diagram in the background technology;

Fig. 2 is the TOC analytical equipment synoptic diagram among the embodiment 1;

Fig. 3 is the TOC analytical equipment synoptic diagram among the embodiment 2;

Fig. 4 is the TOC analytical equipment synoptic diagram among the embodiment 3;

Fig. 5 is the vertical view of magnetic conduction carrier among the embodiment 3.

Embodiment

Embodiment 1

As shown in Figure 2, a kind of TOC analytical equipment comprises and injects unit, flame tube 11, catalyzer, heating unit, temperature conditioning unit and detecting unit.

Described heating unit comprises field coil 21, magnetic conduction carrier 31 and high-frequency heating circuit.Described field coil 21 is arranged on the periphery of flame tube 11; For guaranteeing that direction of current is identical in the every circle of field coil, field coil around to should be consistent; To there be insulating material to separate between every circle field coil and the adjacent windings, in case short circuit; Two terminals of field coil 21 are connected with the output terminal of external high frequency heater circuit; Described magnetic conduction carrier 31 is granular iron, is arranged on the inside of flame tube 11; Described catalyzer is attached on the described magnetic conduction carrier 31.

Described temperature conditioning unit comprises temperature sensor 41, control module.Described temperature sensor 41 is arranged in the flame tube 11, the output terminal link control module.

Detecting unit is connected with the output terminal of flame tube 11.

A kind of TOC analytical approach may further comprise the steps:

A, preheating step:

The target setting temperature is 680 ℃ on control module;

The high-frequency heating circuit produces the high frequency exchange current, and the high frequency exchange current produces high-frequency alternating magnetic field by being arranged on the field coil 21 of flame tube 11 outsides on field coil 21;

The magnetic line of force that high-frequency alternating magnetic field produces passes the magnetic conduction carrier 31 that is arranged on flame tube 11 inside, produces high frequency induction current on magnetic conduction carrier 31;

High frequency induction current overcomes internal resistance and produces thermal effect rapidly in magnetic conduction carrier 31 inside, and the temperature of magnetic conduction carrier 31 rises rapidly, thereby makes the temperature fast rise in the flame tube 11;

As seen, this method is the magnetic conduction carrier in the direct heating flame pipe, and without other medium conduction heat, thermal losses is little, and programming rate is fast in the flame tube;

B, temperature controlling step:

Temperature sensor 41 is measured the temperature in the flame tube 11 in real time, and the actual temperature that records is passed to outside control module;

Control module is according to the difference that records between the target temperature of temperature and setting, and output signal is regulated the output power of high-frequency heating circuit, thereby the internal temperature of flame tube 11 is reached and is stabilized in described target temperature;

C, constant temperature analytical procedure:

After the temperature constant in the flame tube 11, fluid sample enters flame tube 11 by injecting the unit;

Under hot environment, fluid sample is vaporized fast;

Under carrier gas purges, the organism in the vaporized sample with contact attached to the catalyzer on the magnetic conduction carrier 31, under the effect of catalyzer and the generation of the oxygen generation combustion reaction in carrier gas carbon dioxide;

Gas after the burning is taken out of flame tube by carrier gas, lead to detecting unit, detection is carbon dioxide or concentration of oxygen from the carrier gas that flame tube is discharged, relatively gas concentration lwevel recruitment or oxygen concentration reduction and obtain the content of TOC in the fluid sample in the carrier gas.

Granular magnetic conduction carrier has increased the contact area of vaporized sample and catalyzer, helps to improve sample catalytic combustion efficient.The magnetic conduction carrier is in the heating of the inside of flame tube, and firing rate is fast, efficiency of heating surface height.

Embodiment 2

A kind of TOC analytical equipment, as shown in Figure 3, as different from Example 1:

1, flame tube 12 and the field coil 22 outer thermofins 72 that coat;

2, magnetic conduction carrier 32 is netted iron-nickel alloy, helps to increase the contact area of vaporized sample and catalyzer, improves the catalytic combustion efficient of vaporized sample in the flame tube.

A kind of TOC analytical approach, as different from Example 1:

Thin thermofin 72 has played the effect of isolating flame tube 12 and environment, has reduced the loss of heat in the flame tube 12, has protected the engineering staff, also is beneficial to the miniaturization that realizes analytical equipment.

Embodiment 3

A kind of TOC analytical equipment, as Fig. 4, shown in Figure 5, as different from Example 2:

1, thermofin 73 is arranged between flame tube 13 and the field coil 23;

2, magnetic conduction carrier 33 is cavernous copper-iron alloy, helps to increase the contact area of vaporized sample and catalyzer, improves the catalytic combustion efficient of vaporized sample in the flame tube.

A kind of TOC analytical approach, as different from Example 2:

Flame tube surface temperature through heating is higher, and the heat that field coil can bear is limited, in order to protect field coil, makes its life-span elongated, will be arranged between flame tube 13 and the field coil 23 than thin thermofin 73.

Above-mentioned embodiment should not be construed as the restriction to the utility model protection domain.Key of the present utility model is: the high frequency exchange current produces high-frequency alternating magnetic field by the outer field coil of flame tube, high-frequency alternating magnetic field produces induction current and converts heat to being built on the magnetic conduction carrier of flame tube, realizes flame tube inside is directly heated.Under the situation that does not break away from the utility model spirit, any type of change that the utility model is made all should fall within the protection domain of the present utility model.

Claims

1. a TOC analytical equipment comprises flame tube, catalyzer, detecting unit, it is characterized in that: analytical equipment also comprises heating unit and temperature conditioning unit;

2. analytical equipment according to claim 1 is characterized in that: described magnetic conduction carrier is graininess or netted or vesicular.

3. analytical equipment according to claim 1 is characterized in that: described flame tube outer wrap thermofin.

4. according to claim 1 or 2 or 3 described analytical equipments, it is characterized in that: described field coil is arranged on the outside of thermofin.