CN105938139A - Tail gas detection and absorption device for nitric acid production and installation method thereof - Google Patents
Tail gas detection and absorption device for nitric acid production and installation method thereof Download PDFInfo
- Publication number
- CN105938139A CN105938139A CN201610488059.9A CN201610488059A CN105938139A CN 105938139 A CN105938139 A CN 105938139A CN 201610488059 A CN201610488059 A CN 201610488059A CN 105938139 A CN105938139 A CN 105938139A
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- pipeline
- probe
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910017604 nitric acid Inorganic materials 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 47
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000003513 alkali Substances 0.000 claims abstract description 17
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 24
- 210000003437 trachea Anatomy 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a tail gas detection and absorption device for nitric acid production and an installation method thereof. Two gas outlets of a three way pipe are connected to a detection pipeline and an absorption pipeline respectively. The detection pipeline is connected to a gas drier. The gas drier is connected to a mixing box. The mixing box is externally provided with a thermal insulation jacket. The mixing box is connected to a booster pump. The booster pump is connected to a detection cavity. A pressure stabilizing valve is arranged on the pipeline that connects the booster pump and the detection cavity. A nitrogen monoxide probe and a nitrogen dioxide probe are arranged in the detection cavity. The nitrogen monoxide probe and the nitrogen dioxide probe are connected to a micro controller. A wireless module is arranged on the micro controller. The micro controller is connected to a display screen through the wireless module. The absorption pipeline is connected to an alkali liquid absorbing box. An electromagnetic valve is arranged on the absorption pipeline. The electromagnetic valve is connected to the micro controller. A communication pipe is arranged between the absorption pipeline and the detection cavity. A non-return valve is arranged on the communication pipe. The structure is simple, the device is user-friendly, the detected data is accurate, the detection and absorption are combined, the absorbing effect is good, and the pollutant discharge is reduced.
Description
Technical field
The present invention relates to nitric acid production technical field, more particularly, it relates to the Tail gas measuring of a kind of nitric acid production
Absorption plant and installation method thereof and installation method thereof and installation method thereof.
Background technology
Containing certain density nitrogen oxides in the tail gas of nitric acid production, its concentration usually has been out the discharge of country
Standard, needs to carry out denitration process, therefore monitors exhaust gas component in real time for grasping emissions data to closing
Important.Additionally, by the oxygen in reaction end gas, ammonia, the on-line checking analysis of nitrogen oxides, can obtain
Obtain course of reaction parameter to be used for evaluating nitric acid synthesis efficiency.At present the on-line checking of tail gas oil, chemical industry,
The aspects such as metallurgy, environmental protection, automobile are widely used, but are exclusively used in the industrialization of nitric acid production tail gas
Online detection instrument is the most fewer, has researcher to use mass spectrograph, but the Tail gas measuring for industrialized production becomes
This is higher, maintenance complexity, and the suitability is the strongest.In prior art, the Tail gas measuring equipment of use is usually directly
Tail gas is passed in test chamber, owing to gas mixing is uneven, causes detection data fluctuated, inaccurate.
Further, detection equipment can't be realized and be combined with tail gas absorption equipment, cause detecting data delayed, cause
Data obtain inaccurate, affect creation data statistics.And can not be according to real-time emission data to absorbing alkali liquor amount
It is adjusted, causes assimilation effect poor, cause exhaust emissions to exceed standard, affect air ambient.
Accordingly, because prior art exists above-mentioned technological deficiency, it is that those skilled in that art are urgently to be resolved hurrily
Technical problem.
Summary of the invention
The purpose of the present invention is for providing Tail gas measuring absorption plant and the installation method thereof of a kind of nitric acid production, it is intended to
Present in solution prior art, nitric acid tail gas detection is inaccurate, and can not be tied mutually with tail gas absorption by Tail gas measuring
Close, cause the tail gas absorption thorough problem discharging the environmental pollution caused.
For achieving the above object, the present invention provides following technical scheme:
The Tail gas measuring absorption plant of a kind of nitric acid production and installation method thereof, including air inlet pipe, tee T, inspection
Test tube road, extraction duct, gas dryer, blending bin, thermal-insulation coat, force (forcing) pump, pressure maintaining valve, test chamber,
Nitric oxide probe, nitrogen dioxide probe, alkali liquor absorption case, microcontroller, wireless module, display screen, company
Siphunculus, check valve and electromagnetic valve, described air inlet pipe connecting tee pipe, two gas outlets of described tee T connect respectively
Connecing detection pipeline and extraction duct, described detection pipeline connects gas dryer, and described gas dryer connects mixed
Mould assembling, described blending bin is externally provided with thermal-insulation coat, and described blending bin connects force (forcing) pump, and described force (forcing) pump connects inspection
Survey chamber, described force (forcing) pump and test chamber connection pipeline and be provided with pressure maintaining valve, in described test chamber, be provided with nitric oxide
Probe and nitrogen dioxide are popped one's head in, and described nitric oxide probe and nitrogen dioxide probe connect microcontroller, described micro-
Controller is provided with wireless module, and described microcontroller connects display screen, described extraction duct by wireless module
Connecting alkali liquor absorption case, described extraction duct is provided with electromagnetic valve, and described electromagnetic valve connects described microcontroller,
It is communicated with pipe between described extraction duct and test chamber, described communicating pipe is provided with check valve.
Preferably, described alkali liquor absorption case includes casing, feed tube, drain pipe and liquid feeding pump, described absorption tube
End, road is stretched in described casing below liquid level, and described casing one lower sidewall is provided with feed tube, and described casing is another
One side wall upper part is provided with drain pipe, and described feed tube is provided with liquid feeding pump, and described liquid feeding pump connects described microcontroller
Device.
Preferably, also including audible-visual annunciator, described audible-visual annunciator connects described microcontroller.
The invention have benefit that: by arranging blending bin in detection equipment, it is possible to by air inlet in mixing
Carry out mix homogeneously in advance in case, prevent detecting data fluctuated；Detection equipment is combined with absorption equipment and makes
With, it is possible to after the data of on-line real-time measuremen are analyzed, by the electricity in microprocessor controls extraction duct
Magnet valve, is controlled feed rate；And by the liquid feeding pump on microprocessor controls feed tube, can be according to entering
Gas speed controls the feed liquor speed of alkali liquor, it is achieved organic control；The setting of audible-visual annunciator, it is possible to when an oxygen
The detected value of change nitrogen and nitrogen dioxide, beyond after pre-set value, carries out sound and light alarm, reminds operator.The present invention
Simple in construction, easy to use, detection data are accurate, detect and combine with absorption, good absorbing effect, discharge dirt
Contaminate little.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, in describing below
Accompanying drawing is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property work on the premise of, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention；
In figure: 1 air inlet pipe；2 tee Ts；3 detection pipelines；4 extraction duct；5 gas dryers；6 mix
Mould assembling；7 thermal-insulation coats；8 force (forcing) pumps；9 pressure maintaining valves；10 test chamber；11 nitric oxide probes；12 dioxies
Change nitrogen probe；13 alkali liquor absorption casees；131 casings；132 feed tubes；133 drain pipes；134 liquid feeding pumps；
14 microcontrollers；15 wireless modules；16 display screens；17 communicating pipes；18 check valves；19 electromagnetic valves；20
Audible-visual annunciator.
Detailed description of the invention
The invention provides Tail gas measuring absorption plant and installation method, the present configuration of a kind of nitric acid production
Simply, easy to use, detection data are accurate, detect and combine with absorption, and good absorbing effect, exhaust emission is little.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear and
Detailed description, it is clear that described embodiment is only a part of embodiment rather than all of the present invention
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not before making creative work
Put all other embodiments obtained, broadly fall into the scope of protection of the invention.
The Tail gas measuring absorption plant of a kind of nitric acid production as shown in Figure 1 and installation method thereof, including air inlet pipe
1, tee T 2, detection pipeline 3, extraction duct 4, gas dryer 5, blending bin 6, thermal-insulation coat 7,
Force (forcing) pump 8, pressure maintaining valve 9, test chamber 10, nitric oxide probe 11, nitrogen dioxide probe 12, alkali liquor are inhaled
Receive case 13, microcontroller 14, wireless module 15, display screen 16, communicating pipe 17, check valve 18 and electromagnetism
Valve 19, described air inlet pipe 1 connecting tee pipe 2,2 two gas outlets of described tee T connect detection pipeline respectively
3 and extraction duct 4, described detection pipeline 3 connects gas dryer 5, and described gas dryer 5 connects mixed
Mould assembling 6, described blending bin 6 is externally provided with thermal-insulation coat 7, and described blending bin 6 connects force (forcing) pump 8, described in add
Press pump 8 connects test chamber 10, and described force (forcing) pump 8 and test chamber 10 connect pipeline and be provided with pressure maintaining valve 9, institute
Nitric oxide probe 11 and nitrogen dioxide probe 12, described nitric oxide probe 11 it is provided with in stating test chamber 10
With nitrogen dioxide probe 12 connection microcontroller 14, described microcontroller 14 is provided with wireless module 15, institute
Stating microcontroller 14 and connect display screen 16 by wireless module 15, described extraction duct 4 connects alkali liquor absorption
Case 13, described extraction duct 4 is provided with electromagnetic valve 19, and described electromagnetic valve 19 connects described microcontroller 14,
It is communicated with pipe 17 between described extraction duct 4 and test chamber 10, described communicating pipe 17 is provided with check valve
18.The microcontroller 14 used in this technical scheme can be single-chip microcomputer, can be to list according to difference use environment
The use model of sheet machine is changed.Display screen is wirelessly connected with microcontroller, it is achieved display merit
Can, its position can arbitrarily be arranged, as long as conveniently observing, the most specific is fixed on a certain position.
Further, described alkali liquor absorption case 13 includes casing 131, feed tube 132, drain pipe 133
With liquid feeding pump 134, described extraction duct 4 end is stretched in described casing 131 below liquid level, described casing 131
One lower sidewall is provided with feed tube 132, and described another side wall upper part of casing 131 is provided with drain pipe 133, described
Feed tube 132 is provided with liquid feeding pump 134, and described liquid feeding pump 134 connects described microcontroller 14.
Further, also include that audible-visual annunciator 20, described audible-visual annunciator 20 connect described microcontroller
14。
The use principle of the present invention is as follows:
Air inlet pipe 1 connecting tee pipe 2, connects detection pipeline 3 and extraction duct 4 respectively, and detection pipeline 3 enters
Gas connects blending bin 6, carries out air inlet in blending bin 6 buffering and from mixing, and when can make to give vent to anger, gas becomes
Divide mix homogeneously, prevent prohibited data detection true, test chamber 10 arranges nitric oxide probe 11 and dioxy
Change nitrogen probe 12, by detection data feedback to microcontroller 14, microcontroller 14 detection data are passed through nothing
Line mode sends display screen 16 to, it is achieved data detect display in real time, extraction duct 4 is by most nitre
Acid produces tail gas and is passed in alkali liquor absorption case 13, it is achieved the absorption of tail gas, and arranges in extraction duct 4
Electromagnetic valve 19, is controlled electromagnetic valve 19 according to detection data by microcontroller 14, so that air inflow
Mate with alkali liquor in lye tank, and liquid feeding pump 134 be set on the feed tube 132 of alkali liquor absorption case 13,
The feed liquor speed of liquid feeding pump 134 is controlled so that it is can be with the air inflow of extraction duct 4 by microcontroller 14
Match, it is achieved thereby that organically mate, prevent tail gas absorption the most thorough；Microcontroller 14 is arranged
Audible-visual annunciator 20, it is possible to when detected value is beyond pre-set value, send sound and light alarm, remind operator
Take measures.
The invention have benefit that: by arranging blending bin in detection equipment, it is possible to by air inlet in mixing
Carry out mix homogeneously in advance in case, prevent detecting data fluctuated；Detection equipment is combined with absorption equipment and makes
With, it is possible to after the data of on-line real-time measuremen are analyzed, by the electricity in microprocessor controls extraction duct
Magnet valve, is controlled feed rate；And by the liquid feeding pump on microprocessor controls feed tube, can be according to entering
Gas speed controls the feed liquor speed of alkali liquor, it is achieved organic control；The setting of audible-visual annunciator, it is possible to when an oxygen
The detected value of change nitrogen and nitrogen dioxide, beyond after pre-set value, carries out sound and light alarm, reminds operator.The present invention
Simple in construction, easy to use, detection data are accurate, detect and combine with absorption, good absorbing effect, discharge dirt
Contaminate little.
In this specification, each embodiment uses the mode gone forward one by one to describe, what each embodiment stressed is with
The difference of other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Bright.Multiple amendment to these embodiments is apparent from, herein for those skilled in the art
Defined in General Principle can without departing from the spirit or scope of the present invention, in other embodiments
Middle realization.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to and this
Principle disclosed in literary composition and the consistent the widest scope of features of novelty.
Claims (3)
1. the Tail gas measuring absorption plant of a nitric acid production and installation method thereof, it is characterised in that: include into
Trachea, tee T, detection pipeline, extraction duct, gas dryer, blending bin, thermal-insulation coat, force (forcing) pump,
Pressure maintaining valve, test chamber, nitric oxide probe, nitrogen dioxide probe, alkali liquor absorption case, microcontroller, wireless
Module, display screen, communicating pipe, check valve and electromagnetic valve, described air inlet pipe connecting tee pipe, described tee T
Two gas outlets connect detection pipeline and extraction duct respectively, and described detection pipeline connects gas dryer, described
Gas dryer connects blending bin, and described blending bin is externally provided with thermal-insulation coat, and described blending bin connects force (forcing) pump,
Described force (forcing) pump connects test chamber, described force (forcing) pump and test chamber connection pipeline and is provided with pressure maintaining valve, described detection
Intracavity is provided with nitric oxide probe and nitrogen dioxide is popped one's head in, and described nitric oxide probe and nitrogen dioxide probe connect
Microcontroller, described microcontroller is provided with wireless module, and described microcontroller connects display by wireless module
Screen, described extraction duct connects alkali liquor absorption case, and described extraction duct is provided with electromagnetic valve, and described electromagnetic valve is even
Connect described microcontroller, be communicated with pipe between described extraction duct and test chamber, described communicating pipe be provided with list
To valve.
2. the Tail gas measuring absorption plant of nitric acid production as claimed in claim 1 and installation method thereof, it is special
Levy and be: described alkali liquor absorption case includes casing, feed tube, drain pipe and liquid feeding pump, described extraction duct end
Portion stretches in described casing below liquid level, and described casing one lower sidewall is provided with feed tube, described casing opposite side
Wall top is provided with drain pipe, and described feed tube is provided with liquid feeding pump, and described liquid feeding pump connects described microcontroller.
3. the Tail gas measuring absorption plant of nitric acid production as claimed in claim 2 and installation method thereof, it is special
Levying and be: also include audible-visual annunciator, described audible-visual annunciator connects described microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488059.9A CN105938139A (en) | 2016-06-27 | 2016-06-27 | Tail gas detection and absorption device for nitric acid production and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488059.9A CN105938139A (en) | 2016-06-27 | 2016-06-27 | Tail gas detection and absorption device for nitric acid production and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105938139A true CN105938139A (en) | 2016-09-14 |
Family
ID=56873170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610488059.9A Pending CN105938139A (en) | 2016-06-27 | 2016-06-27 | Tail gas detection and absorption device for nitric acid production and installation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN105938139A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024444A (en) * | 2017-02-15 | 2017-08-08 | 武汉启呈环保技术有限公司 | A kind of diesel engine denitration the escaping of ammonia tests reponse system |
| CN107561230A (en) * | 2017-10-31 | 2018-01-09 | 电子科技大学中山学院 | Air detection mechanism based on electric signal or wireless control |
| CN109030725A (en) * | 2018-06-20 | 2018-12-18 | 佛山市川东磁电股份有限公司 | A kind of connection structure of nitrogen dioxide sensor |
-
2016
- 2016-06-27 CN CN201610488059.9A patent/CN105938139A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024444A (en) * | 2017-02-15 | 2017-08-08 | 武汉启呈环保技术有限公司 | A kind of diesel engine denitration the escaping of ammonia tests reponse system |
| CN107561230A (en) * | 2017-10-31 | 2018-01-09 | 电子科技大学中山学院 | Air detection mechanism based on electric signal or wireless control |
| CN109030725A (en) * | 2018-06-20 | 2018-12-18 | 佛山市川东磁电股份有限公司 | A kind of connection structure of nitrogen dioxide sensor |
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Application publication date: 20160914 |