CN209264557U - A kind of ultraviolet difference absorption process flue gas analysis device - Google Patents

Abstract

The utility model discloses a kind of ultraviolet difference absorption process flue gas analysis devices, including analytical equipment shell, the upper end of the analytical equipment shell is fixedly connected with display screen, the calibrating gas air inlet, the lower end of tested smoke air inlet is fixedly connected with the upper end of control valve, the lower end of the control valve and one end of sampling pump are mutually connected by connecting tube, the other end of the sampling pump and one end of filter are mutually connected by another connecting tube, the other end of the filter is fixedly connected with the one end in White pond, the White pond is fixed on the lower end of analytical equipment enclosure interior, the inside in the White pond is fixedly connected with gas chamber, the right end of the gas chamber is fixedly connected sequentially has semiconductor cooler from front to back, heating sheet, the left front end in the White pond is fixedly connected with spectrometer.The ultraviolet difference absorption process flue gas analysis device, improves the accuracy of measurement data, and can measure simultaneously to several gases, improves the detection efficiency of device.

Description

A kind of ultraviolet difference absorption process flue gas analysis device

Technical field

The utility model relates to analytical equipment technical field, specially a kind of ultraviolet difference absorption process flue gas analysis device.

Background technique

Differential absorption spectroscopy mainly studies atmosphere in the ultraviolet characteristic absorption to visible light section using absorbing molecule The trace gas ingredient of layer, difference absorption spectrum technology is to identify gas using the narrow-band absorption characteristic of gas molecule in air Ingredient, and deduce according to narrow-band absorption intensity the concentration of gas.The basic principle of ultraviolet difference absorption process measurement flue gas is, purple Outer visible light emitter has the ultraviolet light beam for determining spectrum to receiver transmitting；Quilt when ultraviolet light passes through the sample room in optical path Measured matter is absorbed, and the ultraviolet signal after absorption is transmitted to after the beam splitting system in spectrometer is divided and projects again On ccd array, it is converted into electric signal through ccd array, then inputs computer after analog-to-digital conversion and is handled, is finally obtained tested Survey the gas concentration in region.

However existing flue gas analysis device is not mostly there is differential absorption spectroscopy is used on existing market, with tradition The miniature deformation that expands with heat and contract with cold of variation bring that mode carries out analysis detection spectrometer ambient temperature to flue gas cause zero point with Range is elegant to question and argue repeatedly；Since light path falls short of, the tested gas that absorption peak is weaker is caused, resolution is measured and accuracy is not high Problem.

Utility model content

The purpose of this utility model is to provide a kind of ultraviolet difference absorption process flue gas analysis devices, to solve above-mentioned background The problem in technology.Zero point and the elegant problem of range, spectrometer are crucial caused by spectrometer is converted because of temperature and pressure Component uses and the small titanium alloy of the coefficient of expansion, and spectrometer, light source, White pond are had to the thermostatic chamber of heating and refrigerating function It is interior, guarantee it in the small work of constant temperature；In order to improve flue gas measurement going property of standard and resolution ratio, by the principle in White pond come Increase the absorption light path of flue gas measurement；In order to improve the accuracy measured for a long time, suction nozzle dynamoelectric switching valve is increased, electricity is passed through Movable valve switching, makes the regular intermittence of instrument be passed through the calibrating gas of known concentration, carries out calibration school to the measurement data of instrument It is quasi-；In order to reduce the adsorptivity loss of measuring cell, measuring cell inner wall is smooth using surface, the quartz glass of no adsorptivity；It is anti- The only pollution of gas chamber, eyeglass and reflecting surface by dust particles in flue gas, 0.5 micron of fine filter built in instrument.

To achieve the above object, the utility model provides the following technical solutions: a kind of ultraviolet difference absorption process flue gas analysis Device, including analytical equipment shell, the upper right side of the analytical equipment shell have to be fixedly connected sequentially front to back and have switch, charge Mouthful, the upper end of the analytical equipment shell is fixedly connected with display screen, the left upper end of the analytical equipment shell from left to right according to It is secondary to offer calibrating gas air inlet, tested smoke air inlet, the lower end of the calibrating gas air inlet, tested smoke air inlet It being fixedly connected with the upper end of control valve, the lower end of the control valve and one end of sampling pump are mutually connected by connecting tube, The other end of the sampling pump and one end of filter are mutually connected by another connecting tube, the other end of the filter and bosom The one end in special pond is fixedly connected, and the middle lower end of the analytical equipment shell is fixedly connected sequentially has internal battery, electricity from left to right Road plate, the White pond are fixed on the lower end of analytical equipment enclosure interior, and the right end in the White pond offers first exhaust end, The inside in the White pond is fixedly connected with gas chamber, and the right end of the gas chamber is fixedly connected sequentially has semiconductor refrigerating from front to back Device, heating sheet, the front end of the gas chamber successively offer second exhaust end, inlet end from left to right, the White pond it is left front End is fixedly connected with spectrometer, and the left back end in the White pond is reserved with light source.

Preferably, the display screen, spectrometer are electrically connected with circuit board.

Preferably, the control valve use can carry out the electrically operated valve that gas source switches selection.

Preferably, the light source, quartz glass gas chamber and spectrometer be both placed in heating sheet, semiconductor cooler it is close In the thermostatic chamber closed, and there are two heating sheet and semiconductor cooler difference diagonal settings.

Preferably, the filter uses 0.5 micrometer polytetrafluoroethylene filter.

Preferably, the gas chamber uses the quartz glass material for not adsorbing tested gas, contamination-free, and the inner wall of gas chamber It is smooth.

Compared with prior art, the utility model has the beneficial effects that the ultraviolet difference absorption process flue gas analysis device, with Existing flue gas analysis device is compared, and is structurally and functionally being made that very big improvement, equal by light source, gas chamber and spectrometer It is placed in the closed thermostatic chamber of heating and refrigerating function, the perseverance of chamber is realized by semiconductor cooler and heating sheet Temperature control system avoids causing the error of testing result because of the influence of environment, and pass through to provide isoperibol to measuring part The method of difference absorption spectrum detects measurement, can measure in the case where measurand chemical behavior is interference-free, simultaneously Several gases can be separated in the overlapping absorbance spectrum of the same band, and then realize and the concentration of several gases is carried out simultaneously Measurement, improves the accuracy of measurement and the efficiency of measurement.

Detailed description of the invention

Fig. 1 is the utility model schematic diagram of internal structure；

Fig. 2 is the utility model White pond schematic diagram of internal structure；

Fig. 3 is the utility model overlooking structure diagram.

In figure: 1, analytical equipment shell；2, it switchs；3, charge port；4, display screen；5, calibrating gas air inlet；6, it is tested Smoke air inlet；7, control valve；8, connecting tube；9, sampling pump；10, filter；11, Huai Techi；12, internal battery；13, One exhaust end；14, gas chamber；15, heating sheet；16, semiconductor cooler；17, second exhaust end；18, inlet end；19, spectrometer； 20, light source；21, circuit board.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of ultraviolet difference absorption process flue gas analysis dress It sets, including analytical equipment shell 1, switch 2, charge port 3, display screen 4, calibrating gas air inlet 5, tested smoke air inlet 6, control Valve 7 processed, connecting tube 8, sampling pump 9, filter 10, White pond 11, internal battery 12, first exhaust end 13, gas chamber 14, heating Piece 15, semiconductor cooler 16, second exhaust end 17, inlet end 18, spectrometer 19, light source 20 and circuit board 21, analytical equipment The upper right side of shell 1 has to be fixedly connected sequentially front to back and has switch 2, charge port 3, and the upper end of analytical equipment shell 1 is fixedly connected There is display screen 4, the left upper end of analytical equipment shell 1 successively offers calibrating gas air inlet 5, tested flue gas air inlet from left to right Mouth 6, calibrating gas air inlet 5, the lower end for being tested smoke air inlet 6 are fixedly connected with the upper end of control valve 7, control valve 7 Lower end and sampling pump 9 one end by connecting tube 8 mutually connect, one end of the other end and filter 10 of sampling pump 9 passes through Another connecting tube 8 is mutually connected, and the other end of filter 10 is fixedly connected with the one end in White pond 11, analytical equipment shell 1 Middle lower end is fixedly connected sequentially from left to right internal battery 12, circuit board 21, and White pond 11 is fixed in analytical equipment shell 1 The lower end in portion, the right end in White pond 11 offer first exhaust end 13, and the inside in White pond 11 is fixedly connected with gas chamber 14, gas chamber 14 right end is fixedly connected sequentially from front to back semiconductor cooler 16, heating sheet 15, the front end of gas chamber 14 from left to right according to Secondary to offer second exhaust end 17, inlet end 18, the left front end in White pond 11 is fixedly connected with spectrometer 19, the left side in White pond 11 Rear end is reserved with light source 20；

Further, display screen 4, spectrometer 19 are electrically connected with circuit board 21, it is ensured that measurement result can pass through display 4 output of screen, avoids the error of survey crew's artificial observation bring measurement result, improves the accuracy of measurement result；

Further, the electrically operated valve that control valve 7 switches selection using that can carry out gas source, by external zero gas, standard gas, Or tested flue gas, it realizes regular zeroing and calibration of the measuring unit in measurement process, improves number when measuring unit measures for a long time According to Stability and veracity；

Further, light source 20, quartz glass gas chamber 14 and spectrometer 19 have been both placed in heating sheet 15, semiconductor refrigerating In the closed thermostatic chamber of device 16, and heating sheet 15 and semiconductor cooler 16 are distinguished there are two diagonal settings, pass through half The thermostatic control of chamber is realized in conductor refrigerator 16 and the heating of heating sheet 15, so that being embodied as crucial measuring part provides constant temperature ring Border；

Further, filter 10 uses 0.5 micrometer polytetrafluoroethylene filter, realizes dust particles in tested flue gas Filtering guarantees that particulate matter does not enter gas chamber 14 and pollutes eyeglass；

Further, gas chamber 14 is using the quartz glass material for not adsorbing tested gas, contamination-free, and gas chamber 14 is interior Wall is smooth, and steam is avoided to remain in inside gas chamber 14, in turn results in the error of measurement result, improves measurement result.

Working principle: first being connected internal battery 12 and flue gas analysis device by switch 2, by calibrating gas and is tested Flue gas each leads into calibrating gas air inlet 5 and tested smoke air inlet 6, and the gas switched by control valve 7 is tested Flue gas flows successively through control valve 7, connecting tube 8, sampling pump 9, filter 10, White pond 11, and sampling pump 9 carries out tested flue gas Sampling, enters filter 10 by pretreated flue gas, the dust particles in tested flue gas are filtered by filter 10, really Protection granules object does not enter gas chamber 14, and then it is contaminated to avoid the eyeglass in gas chamber 14, then passes through heating sheet 15 and semiconductor system Cooler 16 adjusts the temperature in gas chamber 14, so that the temperature control in gas chamber 14 is at 40 degree, UV, visible light optical transmitting set is to reception Device transmitting has a light source 20 for determining spectrum, and light source 20 when gas chamber 14 in optical path by tested flue gas by being absorbed, after absorption The beam splitting system that is transmitted in spectrometer 19 of 20 signal of light source be divided after project on ccd array again, by ccd array On be converted into electric signal, then input computer after analog-to-digital conversion and handled, finally show measurement result by display screen 4 Out, the use of ultraviolet difference absorption process flue gas analysis device is completed.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of ultraviolet difference absorption process flue gas analysis device, including analytical equipment shell (1), it is characterised in that: the analysis The upper right side of device housing (1) has to be fixedly connected sequentially front to back and has switch (2), charge port (3), the analytical equipment shell (1) upper end is fixedly connected with display screen (4), and the left upper end of the analytical equipment shell (1) successively offers mark from left to right Quasi- gas inlet (5), tested smoke air inlet (6), the calibrating gas air inlet (5) are tested under smoke air inlet (6) End is fixedly connected with the upper end of control valve (7), and the lower end of the control valve (7) passes through with one end of sampling pump (9) to be connect It manages (8) mutually to connect, the other end of the sampling pump (9) passes through another connecting tube (8) phase mutual connection with one end of filter (10) Logical, the other end of the filter (10) is fixedly connected with the one end of White pond (11), in the analytical equipment shell (1) under End is fixedly connected sequentially has internal battery (12), circuit board (21) from left to right, and the White pond (11) is fixed on analytical equipment The internal lower end of shell (1), the right end of the White pond (11) offer first exhaust end (13), the White pond (11) it is interior Portion is fixedly connected with gas chamber (14), and the right end of the gas chamber (14) is fixedly connected sequentially has semiconductor cooler from front to back (16), the front end of heating sheet (15), the gas chamber (14) successively offers second exhaust end (17), inlet end from left to right (18), the left front end of the White pond (11) is fixedly connected with spectrometer (19), and the left back end of the White pond (11) is reserved with Light source (20).

2. a kind of ultraviolet difference absorption process flue gas analysis device according to claim 1, it is characterised in that: the display screen (4), spectrometer (19) is electrically connected with circuit board (21).

3. a kind of ultraviolet difference absorption process flue gas analysis device according to claim 1, it is characterised in that: the control valve Door (7) use can carry out the electrically operated valve that gas source switches selection.

4. a kind of ultraviolet difference absorption process flue gas analysis device according to claim 1, it is characterised in that: the light source (20), quartz glass gas chamber (14) and spectrometer (19) be both placed in heating sheet (15), semiconductor cooler (16) it is closed Thermostatic chamber in, and heating sheet (15) and semiconductor cooler (16) are respectively there are two diagonal settings.

5. a kind of ultraviolet difference absorption process flue gas analysis device according to claim 1, it is characterised in that: the filter (10) 0.5 micrometer polytetrafluoroethylene filter is used.

6. a kind of ultraviolet difference absorption process flue gas analysis device according to claim 1, it is characterised in that: the gas chamber (14) the quartz glass material for not adsorbing tested gas, contamination-free, and the inner wall smooth of gas chamber (14) are used.