DE6804417U - DEVICE FOR DETERMINING THE COMPOSITION OF GAS MIXTURES - Google Patents

Description

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KLÖCKNER-WERKE AG ΛDuisburg. Mülheimer Strasse 5o

Device for determining the composition of gas mixtures

The invention relates to a device for detection the composition of gas mixtures.

There are various ways of determining the composition of gas mixtures Devices known.

The Oreat device in particular is used for the analysis of smoke gases applied. In its simplest form, this consists of several absorption pipettes, the liquids of which absorb the individual components of the flue gas one after the other. The respective Change of space in a loot part surrounded by a water jacket The measuring burette is measured and gives the proportions of the prosciutto of the gas.

The Orsat device delivers quite precise values, but has the disadvantage that it requires expensive equipment and is very time-consuming, because the implementation of a gas analysis according to Orsat takes about an hour. This device can therefore not be used if it comes down to the gas composition inside to know less minutes.

It is also known to determine gas analyzes with the aid of measuring tubes. This measuring tube made of a glass tube, Ik which is a reaction mass located on the pump when passing ▼ gases show a color change, so that the gas can be read from the mixture on a scale of percentage. A measuring tube that reacts to the corresponding gas must be used for the analysis of each gas. Each measuring tube can only be used once . CtQ f \ Λ A i £

Generally have used smaller measuring tube to 11 "they daft la allgeaelnen only a small range _t" Kr © ft nlefct ausrelsht to determine the proportions,

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because the amount of the individual gases is above the measuring range the tube lies.

A further disadvantage of the known measuring tubes is that that this is already in the determination of the hydrogen content show a very strong and rapidly occurring exothermic reaction in the case of smaller proportions, which can be a considerable danger, especially with hydrogen.

The invention is based on the object of developing a device which, using known devices It is also possible to determine the proportions of gases in gas mixtures if the proportion is above the measuring range of the display devices, so that a measurement can be made with these tubes is no longer possible without further ado.

The device is characterized by a metering device, which supplies a certain amount of the gas mixture and a certain amount of diluent gas, preferably air, to a container and this mixture of diluent gas and gas mixture promotes by a known device for determining the constituents of gas mixtures, the display area the device for the gas mixture concerned is smaller than the amount of gas in the gas mixture

According to a preferred embodiment, the metering device consists of a hollow body with a suction device A pump can be attached to the hollow body or the suction device is designed as a piston arranged in the hollow body

OIe metering device is provided with an inlet and an outlet connection, whereby in each connection an in-line valve is arranged, which is preferably as a check valve is trained. The outlet port is designed as a bend.

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For the storage of the gas mixture and the air-gas mixture plastic containers are preferably used. As a device for determining the constituents of the gas mixture display devices with color change are preferably provided

The device has the advantage that a gas analysis can be carried out within a few minutes using relatively inexpensive known measuring devices in orders of magnitude above the measuring range thereof, without great expense to cause. The analysis can be carried out in the simplest way with the aid of a small additional device. Expensive ones and complicated devices with large measuring ranges are not more needed.

If, for example, a measuring tube with a test and display area of up to 7 % CO in the gas mixture is used for a CO measurement, a CO proportion of up to 70% can be measured with this small tube, for example with a dilution of the gas mixture of 1: Io With the choice of the dilution ratio, the extension of the measuring range of the tubes can be determined

The device according to the invention does not allow fine measurements, which of course would have to be carried out with a considerable amount of equipment and time, but to a certain extent Catfish a rough measurement, but in practice in general is completely sufficient. If air cannot be used as a dilution gas due to falsification of the measuring mechanisms, instead Another gas, e.g. nitrogen, is used.

The device according to the invention s «Β« b «i a«? rapid analysis of furnace gas in a blast furnace »with the values determined in their accuracy as can be described as completely satisfactory *

However, the device according to the invention is not based on this limited to a special area of application, but can be used anywhere * where a bohnelle gas analysis is desired

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The invention is explained in more detail, for example, on the basis of the attached figures, which, however, only show a preferred embodiment of the device.

Show it

Fig. 1 shows the arrangement of the device when feeding the gas mixture into the mixing container.

2 shows the arrangement of the device during feeding

of ambient air as a diluent in the Mixing tank.

3 shows an arrangement of the device when conveying the diluted gas mixture through a test

Fig. 4 shows a metering device with a piston as Suction device.

According to Flg. 1 is in the container 1 a mixture of different gases, the proportion of which is to be determined in the mixture. For this reason, the container 1 for each becomes investigating gas removed a certain amount of the mixture, with the help of the metering device 2, which consists of a hollow body 3 with a suction device 4. This suction device can, for example, be a pump in the manner of a Be bellows or a rubber ball. The amount sucked out can be, for example, 100 cm '. In the connecting piece 5 between the Dosing device 2 and the container 1 is a check valve 6 arranged around the connection line only in the direction to keep the metering device open, and to avoid a backflow of the gas mixture during transport into the container 7. The connecting line designed as a bend is also provided with a check valve 9 »

According to Flg. 2 is supplied to the container 7 in the corresponding ratio of air a3e dilution. If the mixture feed has been carried out, for example, with a pump stroke, and

4417

a 1: Io dilution is desired for the feed of the dilution air Io pump strokes are required. By a Counting device for the strokes, errors can be largely eliminated.

According to FIG. 3, after the diluted gas mixture has been produced, this diluted mixture is carried out with the aid of the metering device a measuring tube Io sucked out of the container 7, the measuring tube E.g. with a dilution of 1: Io the tenth part of that contained in the gas mixture !. Component indicates. The suction speed the metering device is matched to the color change in order to obtain the most accurate display possible. Around To be as independent as possible of flow losses, the nozzle 5, to which the measuring tube Io is connected, is straight educated.

According to FIG. 4, it is also possible instead of the pump the container 3 to arrange a piston 11 within the same in order to carry out the pumping operations.

Expectations

Claims (9)

ti I « 1 Il> I I I > III I I I I I I Il it »t ti • »· ti I I til It I ItI It ι ti till Il Il Il Expectations 1 device for determining the composition of gas mixtures, characterized by a metering device (2) which feeds a certain amount of the gas mixture and a certain amount of diluent gas - preferably air - to a container (7) and this mixture of diluent gas and gas mixture through a known device for determining the constituents of gas mixtures (lo) promotes, the display area of the device (lo) for the gas in question being smaller than the amount of gas in the gas mixture. 2. Device according to claim 1, characterized in that the metering device (2) consists of a hollow body (3) with a suction device (4) 3. Apparatus according to claim 2, characterized in that a pump is attached to the hollow body (3) as a suction device (4). 4. Apparatus according to claim 2, characterized in that the suction device (4) is designed as a piston (11) arranged in the hollow body (3). 5. The device according to claim 1, characterized in that the metering device (2) is provided with an inlet and an outlet nozzle (5, 8), a one-way valve (u, 9) being arranged in each nozzle. 6. Apparatus according to claim 5, characterized in that the one-way valves (6, 9) are designed as check valves. 7. The device according to claim 5 » characterized in that the outlet nozzle (8) is designed as a bend. 8. The device according to claim 1, characterized in that the storage of the gas mixture and the air-gas mixture in plastic containers (1, 7) takes place. , I Il J J) ') »« J) II I I > I »» » I) I III Il · » ι ι ι ι ι »· iii» »" till Il 111 Il »>»> 9. The device according to claim 1, characterized »that as a device for determining the components of the gas mixture measuring tubes (lo) are provided, which indicate the proportions of the individual gases in the gas mixture by changing the color of a reaction mass.