CN201307092Y

CN201307092Y - A ultraviolet absorption method portable stack gas, auto car tail gas measuring apparatus

Info

Publication number: CN201307092Y
Application number: CNU2008201808881U
Authority: CN
Inventors: 杨秀芹; 郭振铎
Original assignee: 杨秀芹; 郭振铎
Current assignee: Qingdao Bo Rui Optoelectronics Technology Co., Ltd.
Priority date: 2008-12-10
Filing date: 2008-12-10
Publication date: 2009-09-09
Anticipated expiration: 2018-12-10

Abstract

The utility model discloses a a ultraviolet absorption method portable stack gas, auto car tail gas measuring apparatus, which relates to a measuring apparatus for measuring gas strength of NO, No2, S2, NH3,H2S in stack gas; the apparatus is composed by a heating condensation sampling tube (1), a silica gel tube (2), a air-extracting pump (3), a deuterium lamp (4), a sampling gas chamber (5), a optical fiber (6), a spectrometer (7) and a computer (8), wherein the heating condensation sampling tube (1) and the sampling gas chamber (5) is in long barrel shape; the deuterium lamp (4) is set on one side of the sampling gas chamber (5); two ends of the optical fiber (6) are connected with the sampling gas chamber (5) and the spectrometer (7) respectively; the computer (8) connects with the spectrometer through a data wire. The beneficial effects of the utility model are as follows: no signal attenuation, and reduces pollution gas measurement error; no cross interference; can realize 24 hours monitoring under unattended operation; can extend service life with low monitoring cost and can guaranty data accuracy.

Description

The portable flue gas of a kind of ultraviolet absorption method, vehicle exhaust measuring instrument

Technical field:

The utility model relates to the portable flue gas of a kind of ultraviolet absorption method, vehicle exhaust measuring instrument, especially a kind of flue gas NO, NO of being used for ₂, SO ₂, NH ₃, H ₂The measuring instrument of the measurement of concetration of gases such as S.

Background technology:

Flue gas SO commonly used at present ₂, NO, NO ₂Instrumental method Deng the monitoring widespread usage of gas is a constant potentiometric electrolysis, but there is exponential damping problem in time in the measuring-signal of constant potentiometric electrolysis, electrochemical reaction is along with the consumption output signal of electrolytic solution weakens gradually, so increasing along with monitoring time and number of times, same electrochemical sensor is different to the monitor signal of the gas of same concentrations, national environmental standard requires all to need to calibrate before and after each test, need expend a large amount of calibrating gas, employ lot of manpower and material resources; And the cross interference of the gasmetry of constant potentiometric electrolysis, since electrochemical reaction inherent characteristic---the material close when chemical characteristic all can react and output signal to same chemical sensor, add the complicated and changeable of smoke components and concentration thereof, the cross interference of gas componant does not have definite rule to follow, and makes the accuracy of measurement data to ensure; The moisture interference problem of other constant potentiometric electrolysis, in the test process of reality, the water vapor in the flue gas enters in the electrochemical sensor can disturb SO ₂, NO, NO ₂Deng the measurement of gas, even sensor is poisoned and can't operate as normal; Also have the sensor life-time of constant potentiometric electrolysis short, electrochemical sensor commonly used at present mostly is 2 years serviceable life, the each four kinds of sensors changing of smoke detecting instrument need expense roughly about 20,000 yuan, a large amount of sensors is all from Britain's import, roughly there are 10,000 smoke detecting instruments at present domestic environmental monitoring at different levels department in operation, and therefore annual country needs a large amount of foreign exchange of payment to buy electrochemical sensor.

The utility model content:

The purpose of this utility model provides the portable flue gas of a kind of ultraviolet absorption method, vehicle exhaust measuring instrument, and it can be with the SO in the flue ₂, NO, NO ₂, NH ₃, H ₂Gas componants such as S at the absorption spectrum of the uniqueness of ultraviolet band, utilize differential method to calculate the concentration of gas, and the gas of flue gas after dewatering, dust-filtering, heating, rapid condensation can be imported in the sample air chamber in the main frame, and do not have the moisture interference problem, and can increase the service life greatly.In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it is made up of heating condensation stopple coupon 1, silicone tube 2, aspiration pump 3, deuterium lamp 4, sample gas air chamber 5, optical fiber 6, spectrometer 7 and computing machine 8; Heating condensation stopple coupon 1 and sample gas air chamber 5 are long tubulars, and an end of silicone tube 2 is arranged on a side of heating condensation stopple coupon 1, and are connected with heating condensation stopple coupon 1, and the other end of silicone tube 2 then is arranged on the upper end of a side of sample gas air chamber 5; Deuterium lamp 4 is arranged on a side of sample gas air chamber 5 and aspiration pump 3, and the two ends of optical fiber 6 are separately positioned on a side of sample gas air chamber 5 and spectrometer 7, and is connected with a side of sample gas air chamber 5 and spectrometer 7, and computing machine 8 is connected with spectrometer 7 by data line.

The utlity model has following beneficial effect: almost do not have the monitor signal decay, significantly reduce the dusty gas measuring error; The cross interference problem that the gasmetry of constant potentiometric electrolysis also can not occur; Can realize unmanned monitoring in 24 hours; No sensor limits serviceable life, can prolong to be to use the life-span; Need not frequent sample gas and demarcate, reduce the monitoring cost greatly; Need not to control sampling pump extraction flow and cell pressure, guarantee the Monitoring Data accuracy.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Embodiment:

This embodiment is by the following technical solutions: it is made up of heating condensation stopple coupon 1, silicone tube 2, aspiration pump 3, deuterium lamp 4, sample gas air chamber 5, optical fiber 6, spectrometer 7 and computing machine 8; Heating condensation stopple coupon 1 and sample gas air chamber 5 are long tubulars, and an end of silicone tube 2 is arranged on a side of heating condensation stopple coupon 1, and are connected with heating condensation stopple coupon 1, and the other end of silicone tube 2 then is arranged on the upper end of a side of sample gas air chamber 5; Deuterium lamp 4 is arranged on sample gas air chamber 5, and the two ends of optical fiber 6 are separately positioned on a side of sample gas air chamber 5 and micro spectrometer 7, and is connected with a side of sample gas air chamber 5 and micro spectrometer 7, and computing machine 8 is connected with spectrometer 7 by data line.

Principle of work: after instrument is opened, light deuterium lamp 4 to stable by computing machine 8 control triggers, computing machine 8 output orders are opened aspiration pump 3 and are begun to extract flue gas, the heating of output order control simultaneously condensation stopple coupon 1 is started working, tested flue gas falls flue dust through the media filtration in the heating condensation stopple coupon 1, spiral refrigeration body is removed moisture, enter sample gas air chamber 5 through silicone tube 2 again, the smoke components of the ultraviolet light that deuterium lamp 4 sends in sample gas air chamber 5 absorbs, through behind the optically focused by optical fiber 6 lead-in light spectrometers 7, the spectrogram of spectrometer 7 recorded and stored before and after smoke absorption, it is delivered to computing machine 8, compare match with the standard spectrogram in the computing machine 8, thereby draw the SO in the flue gas ₂, NO, NO ₂, H ₂Gas concentrations such as S, and then calculate its discharge capacity.

Almost no signal decay significantly reduces the dusty gas measuring error; The problem of cross interference that the gasmetry of constant potentiometric electrolysis also can not occur; Can realize unmanned monitoring in 24 hours; The restriction in serviceable life of no sensor can prolong instrument serviceable life, need not frequent sample gas and demarcates, and reduces the monitoring cost greatly; Need not to control sampling pump extraction flow and cell pressure, guarantee the Monitoring Data accuracy.

Claims

1, the portable flue gas of a kind of ultraviolet absorption method, vehicle exhaust measuring instrument is characterized in that: it is made up of heating condensation stopple coupon (1), silicone tube (2), aspiration pump (3), deuterium lamp (4), sample gas air chamber (5), optical fiber (6), spectrometer (7) and computing machine (8); Heating condensation stopple coupon (1) and sample gas air chamber (5) are long tubulars, and an end of silicone tube (2) is arranged on a side of heating condensation stopple coupon (1), and (2 the other end then is arranged on the upper end of a side of sample gas air chamber (5) to silicone tube; Deuterium lamp (4) is arranged on a side of sample gas air chamber (5), and the two ends of optical fiber (6) are connected with spectrometer (7) with sample gas air chamber (5) respectively, and computing machine (8) is connected with spectrometer (7) by data line.