CN204514858U - A kind of NMHC gas detecting instrument - Google Patents
A kind of NMHC gas detecting instrument Download PDFInfo
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- CN204514858U CN204514858U CN201520153118.8U CN201520153118U CN204514858U CN 204514858 U CN204514858 U CN 204514858U CN 201520153118 U CN201520153118 U CN 201520153118U CN 204514858 U CN204514858 U CN 204514858U
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Abstract
The utility model discloses a kind of NMHC gas detecting instrument, comprise a shell, and described enclosure is provided with a high temperature companion device chamber, and described high temperature accompanies inside, hot chamber to be provided with a measuring cell, and described measuring cell connects a grade one filter by a secondary filter, and described grade one filter connects a probe by a probe rod, and described grade one filter connects a pressurized air to device of air, described measuring cell also connects mark zero air to device of air, and described measuring cell connects an analyser.The configurable at most tens kinds of gas sensors of the utility model, greatly enhance comprehensive practical performance and the usable range of instrument, and degree of accuracy improve greatly.
Description
Technical field
The utility model relates to a kind of NMHC gas detecting instrument.
Background technology
NMHC gas detecting instrument is a kind of employing galvanochemistry, photoion (PID) sensor or laser spectral analysis method carry out the analytical instrument of the NMHC in testing environment air, the concentration of NMHC in analysis environments can be detected fast, detection hydrogen fluoride can be increased simultaneously, hydrogen chloride, ammonia, sulfuretted hydrogen, methyl mercaptan, several index such as TVOC, there is measuring accuracy high, reliability is high, response time is fast, the feature such as applied widely, indices meets or exceeds similar products at home and abroad, environmental protection on-line monitoring can be widely used in, Industry Control, the occasions such as safety monitoring.
Following shortcoming is there is in prior art:
1, NMHC gas detecting instrument use PID sensor detects the NMHC content in air or in pipeline.The detection method that current NMHC uses and principle mainly contain several: FID hydrogen ion flame method, infrared sensor method, electrochemical sensor method, gas chromatography are all respectively have relative merits.Measurement accuracy is higher, but shortcoming is also obvious; It is also many that electrochemical sensor uses, and be mostly to be formed by membrane electrode and electrolytic solution embedding, electrolyte decomposition is become negative and positive charged ion by gas concentration signal, is spread out of by signal by electrode.
2, FID hydrogen ion flame method is expensive, maintenance cost is high, it not the enervated instrument that general enterprises can bear, main based on import equipment at present, easily hundreds of thousands is to up to a million, be not suitable for large-scale promotion application, and the frequency acquisition interval of data is long, can not real-time continuous reaction factory and enterprise emission behaviour.
3, infrared sensor Performance comparision is stablized, but is do not react substantially for the micro-NMHC of the existence in discharge of pipes and air, and remolding sensitivity is lower in other words, is relatively applicable to the gases such as CO2, CO, CH4 of high concentration content.
4, electrochemical sensor advantage is: reaction velocity is fast, accurately (can be used for ppm level), can quantitatively detect, price material benefit, with low cost, easily use popularization on a large scale.It is mainly applicable to the detection of poisonous gas.Most detection of poison gas adopts the type sensor in the world at present.Shortcoming: electrochemical sensor is shorter for serviceable life, generally only had for two years, and need periodic replacement, cause the maintenance of instrument and equipment to increase, operation cost rises violently; The interference that other gases of NMHC all exist the similar gas of gas surveyed by electrochemical sensor, and data error is larger, poor stability, is easily subject to the impact of moisture in environment for use.
5, gas chromatography principle strictly says it is a laboratory analysis methodologies, and is not suitable for on-line continuous gas-monitoring, and due to complex structure, consumptive material is many, can not response data in time, and that uses is few, and price is also very expensive.
Utility model content
The purpose of this utility model is to provide NMHC gas detecting instrument, and it can solve above-mentioned shortcoming of the prior art.
The utility model is by the following technical solutions:
A kind of NMHC gas detecting instrument, comprise a shell, and described enclosure is provided with a high temperature companion device chamber, and described high temperature accompanies inside, hot chamber to be provided with a measuring cell, and described measuring cell connects a grade one filter by a secondary filter, and described grade one filter connects a probe by a probe rod, and described grade one filter connects a pressurized air to device of air, described measuring cell also connects mark zero air to device of air, and described measuring cell connects an analyser.
Described splitter comprises gas compartment, and described gas compartment connects an interface board, and described gas compartment is provided with a temperature sensor, and described temperature sensor is connected with described interface board, and described gas compartment also connects an electrochemical sensor, and the two ends of described gas compartment are respectively equipped with lens, also comprise a light source, it is inner that its light sent is injected into described gas compartment by described lens, also comprises a spectrometer, light source described in its connection control.
Also comprise a high-temperature resistant ball valve, it is located between described grade one filter and described secondary filter.
Described pressurized air is also provided with a blowback solenoid valve between device of air and described grade one filter.
Described mark zero air is also provided with a standard solenoid valves between device of air and described measuring cell.
The utility model has the advantages that: the configurable at most tens kinds of gas sensors of this instrument, greatly enhance comprehensive practical performance and the usable range of instrument, and degree of accuracy improves greatly.
Accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the utility model is described in detail, wherein:
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the analyser in Fig. 1.
Embodiment
Embodiment of the present utility model is set forth further below in conjunction with accompanying drawing:
As shown in Figure 1, 2, a kind of NMHC gas detecting instrument, comprise a shell, and described enclosure is provided with a high temperature companion device chamber 5, and described high temperature accompanies inside, hot chamber to be provided with a measuring cell 3, and described measuring cell connects a grade one filter 19 by a secondary filter 4, and described grade one filter connects a probe by a probe rod 6, and described grade one filter connects a pressurized air to device of air, described measuring cell also connects mark zero air to device of air, and described measuring cell connects an analyser 1.Analyser is provided with a 4-20mA output interface 10, switch reason input/output interface 11 and a RS485 interface 12.
Also comprise a sampling pump 2, it can take the sample of measuring cell inside.
Described splitter comprises gas compartment, and described gas compartment 17 connects an interface board 14, and described gas compartment is provided with a temperature sensor 20, and described temperature sensor is connected with described interface board, and described gas compartment also connects an electrochemical sensor 15, and the two ends of described gas compartment are respectively equipped with lens, also comprise a light source 16, it is inner that its light sent is injected into described gas compartment by described lens, also comprises a spectrometer 13, light source described in its connection control.Also comprise a HMI module 18, it is mutual that signal crossed by itself and spectrometer.
Also comprise a high-temperature resistant ball valve 7, it is located between described grade one filter and described secondary filter.
Described pressurized air is also provided with a blowback solenoid valve 8 between device of air and described grade one filter.
Described mark zero air is also provided with a standard solenoid valves 9 between device of air and described measuring cell.
NMHC gas detecting instrument advantage of the present utility model:
PID photoion advantage: photoion gas sensor is also known as PID gas sensor.Adopt the photoion gas sensor that the principle of photoion ionized gas is made, have volume little, clever lightness is high, plug and play, the features such as intrinsic safety type, the context of detection that photoion gas sensor is measuring the minimum gas such as NMHC has unrivaled advantage., photoion gas sensor principle of work: photoion gas sensor (PID) adopts the principle of photoion ionized gas to carry out gas detect.Specifically, the ultraviolet light using ion lamp to produce exactly irradiates object gas/bombards, will be ionized after object gas absorbs enough UV energy, by the Weak current produced after detection gas ionization, the concentration of object gas can be detected.The photoion energy of most composition of air (N2, O2 and CO2) all higher than the energy that ion lamp can provide, so the composition of air can not be detected.Therefore, photoion gas sensor (PID) is applicable to for the NMHC gas in testing environment gas very much, and not by the interference of air, accuracy of detection can reach ppb rank.
Photoion gas sensor (PID) detects gas type:
Photoion gas sensor (PID) is convenient, the sensitiveest detection means detecting NMHC, particularly for the advantage that the low-down Leakage Gas of which concentration (leak) has other types sensor incomparable, generally, photoion gas sensor (PID) is mainly used in the detection of NMHC gas, and these volatile matters comprise: aromatics: benzene, dimethylbenzene, naphthalene etc.; Stable hydrocarbon and unsaturated hydro carbons: octane, ethene, cyclohexane etc.; Ketone, aldehyde, ethers: acetone, propionic aldehyde, Neo-thyl etc.; Halogenated hydrocarbon, sulfo-hydro carbons, alcohols, ester class, hydrazine class etc.In addition, detectable inorganics comprises: arsenic, ammonia.
At present; photoion gas sensor (PID) has been integrated on the experiment detector device of hand-held, fixed, desktop gas detector and specialty; be widely used in all conglomeraties such as chemical industry, oil, environmental protection, pharmacy, wine brewing, for safety in production, environmental protection and hazard detection escort.Instrument uses PID sensor to detect NMHC gas, has long service life, stable performance, detects the advantages such as gaseous species is many, extends the usable range of instrument greatly and improves the detection efficiency of instrument.Instrument increases dry filtrating equipment, can remove the moisture in gas and dust, extends the serviceable life of instrument and improves the accuracy detecting data, reducing the maintenance cost of instrument.Tool housing uses ABS engineering plastics, compares original stainless steel material lighter, corrosion-resistant, handsome in appearance.Form increases, and uses LED display, tangible, and man-machine interaction is convenient.Memory data output is large, can be online, conveniently records data.Can outputting analog signal, numeral export RS485 or 232, can achieve a butt joint with data collecting instrument.The parameter of instrument, except NMHC, can also be reserved convenient the increasing of multiple gases sensor interface and expand monitoring function.Instrument, can periodic calibrating and calibration with gas input port.
NMHC gas detect instrument system of the present utility model is an Integrated Intelligent System based on the most modern detection of gas technology.Gas integrated analytic system standard configuration 4x16LCD display, 4x5 keyboard, and miniature common recording chart printer.Appliance requires regularly carries out demarcating and suitable maintenance.Due to surface contamination, the interference that toxic mediators is possible and itself aging, the annual average drift about 10% of electrochemical sensor.If do not have special pollution, electrochemical sensor standard life is generally 1-2.The concrete replacement cycle can extend depending on test case.Easily extensible port reserved by instrument, configurable at most tens kinds of gas sensors, greatly enhances comprehensive practical performance and the usable range of instrument.System adopts neural networks compensate analytical technology, largely can eliminate the mutual interference of various gas.
The utility model is mainly used in home air quality research and application, and refuse landfill NMHC detects, chemical enterprise NMHC pollutant emission monitoring etc.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a NMHC gas detecting instrument, it is characterized in that, comprise a shell, and described enclosure is provided with a high temperature companion device chamber, and described high temperature accompanies inside, hot chamber to be provided with a measuring cell, and described measuring cell connects a grade one filter by a secondary filter, and described grade one filter connects a probe by a probe rod, and described grade one filter connects a pressurized air to device of air, described measuring cell also connects mark zero air to device of air, and described measuring cell connects an analyser.
2. NMHC gas detecting instrument according to claim 1, it is characterized in that, described splitter comprises gas compartment, and described gas compartment connects an interface board, and described gas compartment is provided with a temperature sensor, and described temperature sensor is connected with described interface board, and described gas compartment also connects an electrochemical sensor, and the two ends of described gas compartment are respectively equipped with lens, also comprise a light source, it is inner that its light sent is injected into described gas compartment by described lens, also comprises a spectrometer, light source described in its connection control.
3. NMHC gas detecting instrument according to claim 1 and 2, is characterized in that, also comprises a high-temperature resistant ball valve, and it is located between described grade one filter and described secondary filter.
4. NMHC gas detecting instrument according to claim 3, is characterized in that, described pressurized air is also provided with a blowback solenoid valve between device of air and described grade one filter.
5. NMHC gas detecting instrument according to claim 4, is characterized in that, described mark zero air is also provided with a standard solenoid valves between device of air and described measuring cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520153118.8U CN204514858U (en) | 2015-03-17 | 2015-03-17 | A kind of NMHC gas detecting instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520153118.8U CN204514858U (en) | 2015-03-17 | 2015-03-17 | A kind of NMHC gas detecting instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717065A (en) * | 2016-04-07 | 2016-06-29 | 南京波腾科技工程有限公司 | Continuous monitoring device for non-methane total hydrocarbon and working method of continuous monitoring device |
| CN114669246A (en) * | 2022-03-30 | 2022-06-28 | 合肥工业大学 | A stable catalytic efficiency device in a non-methane total hydrocarbon detector |
| US11578147B2 (en) | 2020-03-17 | 2023-02-14 | Exxonmobil Chemical Patents Inc. | Olefin polymerization processes |
| CN115950982A (en) * | 2022-12-27 | 2023-04-11 | 华电智控（北京）技术有限公司 | High-time-resolution non-methane total hydrocarbon detection method and device |
-
2015
- 2015-03-17 CN CN201520153118.8U patent/CN204514858U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717065A (en) * | 2016-04-07 | 2016-06-29 | 南京波腾科技工程有限公司 | Continuous monitoring device for non-methane total hydrocarbon and working method of continuous monitoring device |
| US11578147B2 (en) | 2020-03-17 | 2023-02-14 | Exxonmobil Chemical Patents Inc. | Olefin polymerization processes |
| CN114669246A (en) * | 2022-03-30 | 2022-06-28 | 合肥工业大学 | A stable catalytic efficiency device in a non-methane total hydrocarbon detector |
| CN115950982A (en) * | 2022-12-27 | 2023-04-11 | 华电智控（北京）技术有限公司 | High-time-resolution non-methane total hydrocarbon detection method and device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160317 |