CN201344917Y

CN201344917Y - Total organic halogen detecting instrument

Info

Publication number: CN201344917Y
Application number: CNU2009200371881U
Authority: CN
Inventors: 戚玉军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-20
Filing date: 2009-02-20
Publication date: 2009-11-11
Anticipated expiration: 2019-02-20

Abstract

The utility model discloses a total organic halogen detecting instrument, aiming to the weaknesses in the prior art, which comprises a preprocessing and automatic sampling system of a sample, a high-temperature combustion cracking device and a detector, wherein the high-temperature combustion cracking device is provided with a double-section type automatic temperature control heating combustion furnace, and a laminated drying water treatment system is connected in series between the high-temperature combustion cracking device and the detector. The utility model has the further improvement that the laminated drying water treatment system consists of a sulfuric acid drying pipe and a membrane drying device which are connected in series. The total organic halogen detecting instrument has the advantages of not only realizing the comprehensive sample range testing of total organic halogen in a water sample, a solid sample, and a liquid sample which contains a great deal of grains and suspended articles, but also having excellent detection sensitivity and accuracy.

Description

Total organic halogen detector

Technical field

The utility model relates to a kind of working sample total organic halogen analysis on Content instrument, belongs to the chemical analysis instrument field.

Background technology

Total organic halogen is a total quantity index that characterizes halogenated organic matters, and halogenated organic matters then mainly reflects the level of DBPs in the water cholorination process and the situation that some synthesis of chemicals pollute.Therefore the total organic halogen that contains in potable water, surface water, underground water, waste water, chilled water, industrial discharge waste water and soil, the mud is detected and in addition strict control become environmental protection, given the important content of water treatment and disinfection technology research.Measure for total organic halogen in the sample,, generally adopt the high temperature microcoulometry and the chromatography of ions at present by the principle of work difference.Be robotization, the intellectuality that realizes preferably analyzing, almost all adopt high-temp combustion microcoulometry principle to design both at home and abroad and produce the total organic halogen analytical equipment.

Seldom there is producer to produce but the device that at present this efficiently and accurately is measured total organic halogen content is domestic, the main dependence of domestic existing this type of device import.Wherein most representative is exactly the multi X 2000 total organic halogen analysers that German company is produced, coulomb pond, column adsorption method and the vibration absorption method of this product by gas lock formula vertical combustion stove design, particular design, special structural design such as all automatic measurement system can be extended at any time, the accurate mensuration of the total organic halogen in reliable and stable full-automatic sample introduction and the certain limit can be realized.But, this type of analyser is in the actual application of relevant unit, still exist some significantly not enough, price is comparatively expensive on the one hand, this kind equipment is owing to can not carry out the processing of finish-drying to moisture content in the sample analysis process on the other hand, the sensitivity, the accuracy that make sample detect have been subjected to influence to a certain degree, and its actual usable range has been subjected to certain limitation.In recent years, at the defective in the said equipment use, many business organizations have carried out the research of technique transformation, but actual effect is always not fully up to expectations, or are that the scrap build cost is too high, or are the operation of equipment complexity, or are to detect effect to improve not obvious.

Summary of the invention

To be solved in the utility model is the deficiencies in the prior art, a kind of novel total organic halogen detector is provided, it can not only realize water sample, solid sample at low cost and contain the mensuration of the full sample scope of total organic halogen in the fluid sample of a large amount of particles, suspension, and detection sensitivity, accuracy are better.

For achieving the above object, the utility model is achieved through the following technical solutions: a kind of total organic halogen detector, comprise The pretreatment and automatic sample handling system, the high-temp combustion cracker, detecting device, described The pretreatment and automatic sample handling system comprise computing machine and the transfer valve that links to each other with computing machine, solenoid valve, syringe pump combines, described detecting device comprises the micro-coulometric titration pond, described high-temp combustion cracker has the temperature automatically controlled heating flame stove of two section type, also is serially connected with between described high-temp combustion cracker and the detecting device and builds up drying water treatment system.

As further improvement of the utility model, the described drying water treatment system that builds up is connected in series with the film drying device by the sulfuric acid drying tube and forms.

Further improve as of the present utility model, described film drying device is made of a plurality of Nafion film drying tubes.

Adopt technique scheme, make to the utlity model has following advantage:

1, sensing range is wider, detection is more accurate.The utility model is by building up drying water treatment system being connected in series between high-temp combustion cracker and the detecting device, this drying system is connected in series with the film drying device by the sulfuric acid drying tube, makes gas to be detected not be detained moisture content before entering coulometric detector and reaches and do not contain any moisture content.Described film drying device has adopted the characteristics of Nafion infiltrate membrane technology, this permeable membrane is a kind of special optional membrane that has, with hydrone very strong adsorbability is arranged, only remove vaporous water, keeping gas to be measured fully can be not influential for other gas composition, therefore remove moisture for needs and but do not influence its gas composition, adopt behind this device not only and can carry out completely dried but also can not produce disturbing effect, thereby significant effective have improved the sensitivity and the accuracy of detecting device the sample gas that Pintsch process forms to measuring.And when the temperature automatically controlled heating flame stove of high-temp combustion cracker employing two section type, by the design preheating and the two sections combustion systems that burn, burning zone reaches 1100 ℃, 600～800 ℃ of preheating section temperature, to reach the smooth combustion of explosive mixture matter, can realize preferably that total organic halogen is measured in the full sample scope.

2, comprehensive benefit is obvious.The utility model has only added a few components on to existing halogen detector basis, advanced the production domesticization of this type of analytical instrument with lower cost.Its good comprehensive performances and more excellent cost performance make the utility model be subjected to user's extensive welcome and favorable comment in commerce is on probation,

Description of drawings

Fig. 1: the structural representation of the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail:

Reach the transfer valve 2, solenoid valve 3, the flow control apparatus 10 that link to each other with computing machine by computing machine 1 among Fig. 1 and be combined into pre-service and automatic sample handling system.When transfer valve 2 switches to pipeline pre-service and manner of cleaning up, communicate with the flow injection pump and to carry out pipe passage and flame tube cleaning, purpose is done preparation for carrying out sample determination; When transfer valve 2 switches to the blank determination mode, communicate with the flow injection pump, after getting pure water and activated charcoal (the same with the sample preprocessor) adsorption treatment being good, Automatic Program sample introduction and calculate blank value repeats repeatedly calculating mean value in accordance with regulations; When transfer valve 2 switches to the sample determination mode, communicate with the flow injection pump and to carry out automatic sampling, sample introduction, burning and the titration of sample, realize that the sample total organic halogen measures; When transfer valve 2 switches to the waste gas and waste liquid processing mode, carry out waste gas and waste liquid and collect automatically.Realization by multiple stream control realizes The pretreatment and auto injection.When measuring the total organic halogen of fluid sample, computing machine 1 control transfer valve 2 is through solenoid valve 3 accurate Flow Controls, volatile halogenated by carrier gas stripping 4 (POX) enters the temperature automatically controlled combustion furnace 5 of two section type through high-temp combustion generation hydrogen halides, carbon dioxide and water, dewater through sulfuric acid drying tube 6 one-levels, when still having a spot of moisture again by membrane dryer 7, hydrone is penetrated into outer arm from the inner arm of filtering membrane, thereby is purged away by carrier gas.The pyrolysis gas that produces through secondary drying water treatment drying after, the sensitivity and the accuracy that have effectively improved detecting device have enlarged the detection lower limit of sample.Halogenide enters coulomb pond 8 with gas form, detects with the microcoulomb method.Be reflected in the acetate environment and carry out, reaction equation is: Ag ⁺+ X ^-→ AgX.By amplifier 9 determination data is fed back in the computing machine more at last.

When measuring solid sample, solid sample enters the temperature automatically controlled combustion furnace 5 of two section type automatically under computer program control, produce hydrogen halides through high-temp combustion, carbon dioxide and water, dewater through sulfuric acid drying tube 6 one-levels, when still having a spot of moisture again by membrane dryer 7, hydrone is penetrated into outer arm from the inner arm of filtering membrane, thereby is purged away by carrier gas.The pyrolysis gas that produces through secondary drying water treatment drying after, the sensitivity and the accuracy that have effectively improved detecting device have enlarged the detection lower limit of sample.Halogenide enters a coulomb pond with gas form, detects with the microcoulomb method.Be reflected in the acetate environment and carry out, reaction equation is: Ag ⁺+ X ^-→ AgX.By amplifier 9 determination data is fed back in the computing machine more at last.

When measuring mud or sediment, mud or sediment are mixed with acticarbon, use not chloride nitrate storing solution wash-out then, the inorganic halogen compounds that contains with removal.Then mud is burnt in Oxygen Flow with acticarbon.The hydrogen halides that produces in the combustion process detects with microcoulometry with above-mentioned by after the drying.

Claims

1, a kind of total organic halogen detector, comprise The pretreatment and automatic sample handling system, high-temp combustion cracker, detecting device, described The pretreatment and automatic sample handling system comprise that transfer valve, solenoid valve, syringe pump that computing machine links to each other with computing machine combine, described detecting device comprises the micro-coulometric titration pond, it is characterized in that described high-temp combustion cracker is provided with the temperature automatically controlled heating flame stove of two section type, also is serially connected with between described high-temp combustion cracker and the detecting device and builds up drying water treatment system.

2, total organic halogen detector according to claim 1 is characterized in that the described drying water treatment system that builds up is connected in series with the film drying device by the sulfuric acid drying tube and forms.

3, total organic halogen detector according to claim 2 is characterized in that describedly it is characterized in that described film drying device is made of a plurality of Nafion film drying tubes.