CN110127639A - A kind of preparation system and preparation method of online normal concentration chloro-nitric acid - Google Patents
A kind of preparation system and preparation method of online normal concentration chloro-nitric acid Download PDFInfo
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- CN110127639A CN110127639A CN201910448523.5A CN201910448523A CN110127639A CN 110127639 A CN110127639 A CN 110127639A CN 201910448523 A CN201910448523 A CN 201910448523A CN 110127639 A CN110127639 A CN 110127639A
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- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/083—Compounds containing nitrogen and non-metals and optionally metals containing one or more halogen atoms
- C01B21/084—Compounds containing nitrogen and non-metals and optionally metals containing one or more halogen atoms containing also one or more oxygen atoms, e.g. nitrosyl halides
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Abstract
The present invention relates to the preparation systems and preparation method of a kind of online normal concentration chloro-nitric acid, belong to atmosphere quality detection technique field, solve in the prior art about ClNO2Study deficienter the technical issues of leading to not preparation normal concentration chloro-nitric acid.The preparation system includes the first N2O5Preparation unit, humidity controlling unit and heterogeneous reaction unit；First N2O5Preparation unit is connected with humidity controlling unit, and is connected to by gas phase reaction pipe with heterogeneous reaction unit；First N2O5Preparation unit is used to prepare N2O5And by N2O5It is delivered to heterogeneous reaction unit；Humidity controlling unit is used to control the flow and humidity of delivery air；Heterogeneous reaction unit is used to prepare the chloro-nitric acid of normal concentration.The present invention both can be used for detection device calibration, it can also be used to laboratory ClNO2Reaction property research.
Description
Technical field
The present invention relates to atmosphere quality detection field more particularly to a kind of preparation systems of online normal concentration chloro-nitric acid
System and preparation method.
Background technique
Chloro-nitric acid (ClNO2) by dinitrogen pentoxide (N2O5) in sol surface containing chlorine, it is produced by the way that heterogeneous reaction occurs
It is raw.The ClNO of generation2Photolysis can occur after second day sunrise, release chlorine atom and NOx, wherein Cl atom can be with
A series of volatile organic matters (VOC) generation oxidation reactions generate secondary organic aerosol increase particulate pollutant and contain in atmosphere
Amount, simultaneous reactions can also discharge O in the process3Aggravate atmospheric photochemistry pollution, it is important that the reaction rate of Cl atom and VOC are normal
The most of OH free radical that is higher than of number reacts the 1-2 order of magnitude, therefore ClNO with VOC2To atmospheric oxidn process important role.
China is existing for ClNO2Correlative study is also deficienter, and with urbanization modernization development, pollutant emission is strong
Degree is big, and NOx and particle concentration are high in atmosphere, ClNO2Pollution may be played and more importantly acted on.
Summary of the invention
In view of above-mentioned analysis, the embodiment of the present invention be intended to provide a kind of online normal concentration chloro-nitric acid preparation system and
Preparation method, to solve due to ClNO in the prior art2The deficienter nitre for leading to not prepare normal concentration of correlative study
The technical issues of acyl chlorides.
The invention discloses a kind of preparation systems of online normal concentration chloro-nitric acid, including the first N2O5Preparation unit, humidity
Control unit and heterogeneous reaction unit；First N2O5Preparation unit is connected with humidity controlling unit, and passes through gas phase reaction
Pipe is connected to heterogeneous reaction unit；First N2O5Preparation unit is used to prepare N2O5And by N2O5It is delivered to heterogeneous reaction list
Member；Humidity controlling unit is used to control the flow and humidity of delivery air；Sodium chloride solution and N in heterogeneous reaction unit2O5
It is reacted after contact, generates the chloro-nitric acid of normal concentration.
Further, heterogeneous reaction unit includes heterogeneous reaction pipe, is equipped with solution tank, solution in heterogeneous reaction pipe
Sodium chloride solution is filled in slot.
Further, the first N2O5Preparation unit includes the first high-pressure air source, ozone generator, the second high-pressure air source, third
High-pressure air source and gas phase reaction pipe；First high-pressure air source is oxygen Standard Gases, and the second high-pressure air source is nitrogen dioxide, and third is high
Pressurized air source is for diluting N2O5Air；First high-pressure air source is connected to by ozone generator with gas phase reaction pipe；Second high pressure
Gas source is directly connected to gas phase reaction pipe；Third high-pressure air source is connected to the outlet of gas phase reaction pipe from pipeline.
Further, ozone generator is equipped with on-line gas analysis instrument, and on-line gas analysis instrument can be used in measuring O3、
N2O5And ClNO2Concentration.
Further, humidity controlling unit includes the 4th high-pressure air source, humidifier tube and temperature humidity analyzer；4th high pressure
It is zero air or synthesis of air in gas source；Humidifier tube is used to increase the humidity of zero air or synthesis of air；Temperature humidity analyzer
For measuring and controlling the humidity, temperature and flow of zero air or synthesis of air.
Further, the first high-pressure air source, the second high-pressure air source, be correspondingly provided with first flow control in third high-pressure air source
Device, second flow controller and the 4th flow controller；4th high-pressure air source by triple valve respectively with the first branch and second
Branch connects, corresponding in the first branch and second branch to be equipped with the 4th flow controller and the 5th flow controller；It is first-class
Amount controller to the 5th flow controller is one of mass flowmenter, suspended body flowmeter, needle-valve or proportion magnetic valve.
Further, the output pipe of gas phase reaction pipe is equipped with switch valve, the 2nd N2O5Preparation unit passes through switching valve
Door is connected to heterogeneous reaction pipe, the 2nd N2O5Preparation unit is used to prepare N2O5And by N2O5It is delivered to heterogeneous reaction unit.
The invention also discloses a kind of preparation methods of online normal concentration chloro-nitric acid, using above-mentioned online normal concentration
The preparation system of chloro-nitric acid, the preparation method the following steps are included:
S1. the first N is utilized2O5Preparation unit prepares N2O5；
S2. the humidity and temperature of air are adjusted using humidity controlling unit；Air a part that 4th high-pressure air source provides
Through in the first branch the 4th flow controller and humidifier tube enter temperature humidity analyzer, another part is through in second branch
Third flow controller enters temperature humidity analyzer, through temperature humidity analyzer adjusting after output have with certain temperature and
The air of humidity；
S3. using heterogeneous reaction unit style for normal concentration chloro-nitric acid.
Further, in S1 step, the first high-pressure air source, the second high-pressure air source and third high-pressure air source are opened, and lead to
It crosses first gas flow controller and second gas flow controller adjusts and NO2Flow；O2O is generated through ozone generator3,
O3And NO2N is generated in the gas phase reaction pipe of adjustable size2O5。
Further, in the S3 step, air and N with certain humidity, temperature and flow2O5It is entered after mixing
In heterogeneous reaction pipe, in heterogeneous reaction pipe, N2O5Heterogeneous reaction occurs with the sodium chloride solution in solution tank, generates
Product ClNO2。
Compared with prior art, the present invention can at least realize one of following beneficial effect:
(1) compared with prior art, provided by the invention to produce normal concentration ClNO2Technology be based on flow control, wet
The method of degree control and chemical conversion, realizes normal concentration ClNO2Preparation, which can be not only used for detection device mark
It is fixed, it can also be used to laboratory ClNO2Reaction property research plays a significant role and anticipates to further investigation China's atmosphere polluting problem
Justice.
(2) the preparation system design of online normal concentration chloro-nitric acid provided by the invention is succinct, easy to carry and be easy to grasp
Make, it is very convenient to being demarcated in field observation Instrumental.
(3) the chloro-nitric acid concentration range of the chloro-nitric acid preparation system preparation provided through the invention is wide and continuous, is suitable for
Experiment condition needed for various.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification embodiment and attached
It is achieved and obtained in specifically noted content in figure.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the structural schematic diagram for producing normal concentration chloro-nitric acid technology that embodiment 1 provides.
Appended drawing reference:
The first high-pressure air source of 1-；The second high-pressure air source of 2-；The 4th high-pressure air source of 3-；4- first gas flow controller；5-
Second gas flow controller；6- third gas flow controller；7- ozone generator；8- gas phase reaction pipe；9- temperature humidity
Analyzer；10- solution tank；11- heterogeneous reaction pipe；12- on-line gas analysis instrument；13- humidity control module；14- humidifier tube；
The 4th gas flow controller of 15-；The 2nd N of 16-2O5Preparation unit；17- switch valve；The 4th high-pressure air source of 18-；19- the 5th
Gas flow controller.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.
Embodiment 1
Present embodiment discloses a kind of preparation systems of online normal concentration chloro-nitric acid, as shown in Figure 1, including the first N2O5
Preparation unit, humidity controlling unit 13 and heterogeneous reaction unit；First N2O5Preparation unit is connected with humidity controlling unit 13
It connects, and is connected to by gas phase reaction pipe 8 with heterogeneous reaction unit；First N2O5Preparation unit is used to prepare N2O5And by N2O5
It is delivered to heterogeneous reaction unit；Humidity controlling unit 13 is used to control the flow and humidity of delivery air；Heterogeneous reaction list
Member is for generating the chloro-nitric acid of normal concentration.
Specifically, the preparation system of above-mentioned online normal concentration chloro-nitric acid includes the first N2O5Preparation unit, the first N2O5System
The standby standby N of unit style2O5It is connected to by gas phase reaction pipe 8 with humidity controlling unit 13, humidity controlling unit 13 controls and exports tool
There are the air of certain humidity and temperature and and N2O5It is sufficiently mixed, mixed N2O5And air enters heterogeneous reaction list together
Sodium chloride solution and N in member, in heterogeneous reaction unit2O5It is reacted after contact, generates the chloro-nitric acid of normal concentration.It needs
Bright, in the present invention normal concentration ClNO2Refer to and depressed in a normal atmosphere, produces the chloro-nitric acid of known concentration.
Compared with prior art, provided by the invention to produce normal concentration ClNO2Technology be based on flow control, humidity control
System and the method for chemical conversion, realize normal concentration ClNO2Preparation, the technology can be not only used for detection device calibration,
It can be used for laboratory ClNO2Reaction property research etc..
For the specific structure of heterogeneous reaction unit, heterogeneous reaction unit mainly includes heterogeneous reaction pipe
11, heterogeneous reaction pipe 11 is interior to be equipped with solution tank 10, and the sodium chloride solution of known concentration is filled in solution tank 10.
Specifically, it is equipped with solution tank 10 in the bottom of heterogeneous reaction pipe 11, fills known concentration in the solution tank 10
Sodium chloride solution, through the first N2O5The N of preparation unit preparation2O5Treated with specific temperature with humidified control unit
Enter in heterogeneous reaction pipe 11 after being mixed with the air of humidity and flow, the N2O5Mixed gas with air is non-equal
The sodium chloride solution of the known concentration in solution tank 10 is touched in phase reaction pipe 11, and heterogeneous anti-with sodium chloride solution generation
It answers, generates required product ClNO2.It should be noted that under the conditions of high concentration sodium chloride, N2O5To ClNO2Conversion yield be
100%, reaction equation N2O5+ NaCl=ClNO2+NaNO3, the gaseous products of the reaction only have ClNO2, when needing that nitre is discharged
When acyl chlorides gas, gaseous impurities N may be contained in the gas of discharge2O5, but existing chemical ionization mass spectrometry means can be passed through
Whether contain N in detection product2O5, so that it is guaranteed that not containing N in the nitryl chlorine body of discharge2O5。
It is emphasized that ClNO2Molar concentration be equal to the N that converts completely2O5Molar concentration, N2O5Concentration can be by
On-line gas analysis instrument 12 determines: measuring ozone concentration initial value before being passed through nitrogen dioxide, is passed through measured value after nitrogen dioxide
It is differed with initial value Ji Wei consumption value, nitrogen dioxide and ozone reaction stoichiometric ratio are 1:1, therefore ozone depletion value is N2O5
Generation value, reactive chemistry formula are as follows: NO2+O3=NO3+O2；Nitrogen dioxide can also be passed through simultaneously
Concentration mensuration carrys out inspection result, and front and back nitrogen dioxide consumption is N2O5Production quantity.
In order to prepare N2O5And it is diluted processing, above-mentioned first N2O5Preparation unit includes the first high pressure gas
Source 1, ozone generator 7, the second high-pressure air source 2, third high-pressure air source 3 and gas phase reaction pipe 8 are in first high-pressure air source 1
Oxygen Standard Gases, are nitrogen dioxide in the second high-pressure air source 2, for for diluting N in third high-pressure air source 32O5Air；First
High-pressure air source 1 is connect with ozone generator 7, and is connected to by ozone generator 7 with gas phase reaction pipe 8；Second high-pressure air source 2 is logical
Ozone generator 7 is crossed to be connected to gas phase reaction pipe 8；Third high-pressure air source 3 is connected to gas phase reaction pipe 8.
Illustratively, the first high-pressure air source 1 is oxygen Standard Gases, and the second high-pressure air source 2 is nitrogen dioxide, third high pressure gas
Source 3 is zero air or synthesis of air；First high-pressure air source 1 is connect by pipeline with ozone generator 7, and ozone generator 7 produces
Raw ozone is entered after mixing with the nitrogen dioxide that the second high-pressure air source 2 exports in the adjustable gas phase reaction pipe 8 of volume,
Ozone and nitrogen dioxide react in gas phase reaction pipe 8 and generate N2O5, N2O5The air exported through third high-pressure air source 3
Mixed gas is mixed and formed with the air with certain humidity and temperature that humidity controlling unit 13 exports after dilution, is then mixed
Conjunction gas enters in heterogeneous reaction pipe 11 to react with the sodium chloride solution in solution tank 10, generates ClNO2。
It should be noted that due to not diluted N2O5Concentration is too high, and N in real atmosphere2O5Concentration it is up to several
A ppb magnitude, therefore, it is necessary to by N2O5It is diluted processing, although N2O5To a certain extent can with after humidifying air mixed flow
It is diluted, but since air humidification unit is that selectivity uses, it is therefore desirable to be equipped with diluent air；In addition, the first N2O5Preparation is single
The preparation method of member can be independently operated, can be equipped with simultaneously diluent air with integrality.
High voltage discharge type ozone generator 7, ultraviolet lamp illuminaton ozone generator 7 etc. can be selected in above-mentioned ozone generator 7,
Wherein, ultraviolet lamp fluorescent tube uses launch wavelength for the ultraviolet lamp fluorescent tube of 185nm or 254nm.In addition, the above-mentioned adjustable section of volume
The material of gas phase reaction pipe 8 quartz material, tetrafluoro material etc. can be selected, capacity can be according to reaction duration and concentration necessary
It is adjusted.
For on-line determination ozone, N2O5And ClNO2Concentration, on ozone generator 7 be equipped with on-line gas analysis instrument
12, on-line gas analysis instrument 12 can be used in measuring ozone, N2O5And ClNO2Concentration.It should be noted that temperature humidity is surveyed
Determining instrument 9 can be selected many measures equipment such as dew point hygrometer, temperature humidity probe, measure the temperature for flowing through zero air or synthesis of air
And humidity；The on-line analysis analyzer is connected to computer, each gas flow controller or manual is accordingly regulated and controled by software
Regulation, to realize on-line determination and obtain ozone, N2O5And ClNO2Concentration mensuration data.
In order to measure N under different humidity2O5To generate ClNO2Influence, humidity controlling unit 13 include the 4th high pressure gas
Source 18, humidifier tube 14 and temperature humidity analyzer 9；It is air in 4th high-pressure air source 18, which is that zero air or synthesis are empty
Gas；Humidifier tube 14 is for increasing air humidity；Temperature humidity analyzer 9 is used to measure and control the humidity, temperature and stream of air
Amount.Illustratively, the 4th high-pressure air source 18 is air-source, including zero air and synthesis of air, and zero air or synthesis of air are logical
It crosses through humidifier tube 14 or is directly entered temperature humidity analyzer 9, and control the wet of the air through temperature humidity analyzer 9
Degree, temperature and its flow.It can control the humidity, temperature and flow of delivery air by humidity controlling unit 13.
It is set it should be noted that many measures such as dew point hygrometer, temperature humidity probe can be selected in above-mentioned temperature humidity analyzer 9
Standby, dew point hygrometer and temperature humidity probe can measure the temperature and humidity of the air flowed through；Temperature humidity analyzer 9 and computer
Connection controls humidity controlling unit 13 by computer, and accordingly regulates and controls its flow by software or regulate and control its flow manually.
In order to control the first N2O5The gas flow of preparation unit, humidity controlling unit 13 and heterogeneous reaction unit, first
High-pressure air source 1, the second high-pressure air source 2, third high-pressure air source 3 are corresponding to be equipped with first flow controller, second flow controller
With the 4th flow controller；4th high-pressure air source 18 is connect with the first branch and second branch respectively by triple valve, and first
It is corresponding on road and second branch to be equipped with the 4th flow controller and the 5th flow controller；First flow controller to the 5th stream
Amount controller can select one of mass flowmenter, suspended body flowmeter, needle-valve or proportion magnetic valve.
Specifically, first gas flow controller 4 is for controlling O2Flow, second gas flow controller 5 is for controlling
NO processed2Flow, third flow controller is used to control the flow of zero air or synthesis of air in third high-pressure air source 3；The
Four flow controllers enter zero air or synthesis of air of humidifier tube 14 for air, the 5th flow controller for control without
Humidifier tube 14 is directly entered zero air or synthesis of air of temperature humidity analyzer 9.Illustratively, first flow controller is to
Five flow controllers can select one of mass flowmenter, suspended body flowmeter, needle-valve or proportion magnetic valve respectively.
In a kind of possible design, the preparation system of online normal concentration chloro-nitric acid provided by the invention further includes second
N2O5Preparation unit 16 is equipped with switch valve 17, the 2nd N on the output pipe of gas phase reaction pipe 82O5Preparation unit 16 passes through
Switch valve 17 is connected to heterogeneous reaction pipe 11, the 2nd N2O5Preparation unit 16 is used to prepare N2O5And by N2O5It is delivered to non-equal
Phase reaction unit.
Specifically, the N of normal concentration2O5By the 2nd N2O5Preparation unit 16 generates, the 2nd N2O5Preparation unit 16 includes
Oxygen pressure gas source or air high-pressure air source, NO2High-pressure air source, flow controller, photodissociation chamber and mixing chamber, photodissociation is intracavitary to be equipped with
The gas of ultraviolet lamp, oxygen or the output of air high-pressure air source enters photodissociation chamber through flow controller, by ultraviolet in photodissociation chamber
Light solution generates quantitative ozone, NO2High-pressure air source is connect with flow controller, with photodissociation chamber come out ozone mix, into mix
Room is closed, i.e. reaction generates N2O5；Wherein, oxygen or air high-pressure air source, NO2The flow of high-pressure air source output gas is 0.001l/
Min~500L/min.
Zero air in the present invention refers to without ozone, nitrogen oxides, hydrocarbon and any can make ozone analyzer
Generate the air of other substances of UV absorption.
Synthesis of air refers to the gas of the proportional arrangement according to oxygen in real atmosphere and nitrogen.
Embodiment 2
Present embodiment discloses a kind of preparation methods of online normal concentration chloro-nitric acid, as shown in Figure 1, using embodiment 1
There is provided online normal concentration chloro-nitric acid preparation system, the preparation method the following steps are included:
S1. the first N is utilized2O5Preparation unit prepares N2O5；
S2. the humidity and temperature of air are adjusted using humidity controlling unit 13；
S3. using heterogeneous reaction unit style for normal concentration chloro-nitric acid.
Specifically, in S1 step, preparation preparation N is carried out2O5When, the first high-pressure air source 1 is opened, opens and sets first
Gas flow controller 4, opens simultaneously 7 power supply of ozone generator, oxygen by the setting value of first gas flow controller 4 into
Enter ozone generator 7, the ozone of generation enters among gas phase reaction pipe 8, opens the second high-pressure air source 2, opens and sets the
Two gas flow controllers 5, nitrogen dioxide gas enter in gas phase reaction pipe 8 after passing through, O3And NO2It is sufficiently mixed raw after reacting
At N2O5.Third high-pressure air source 3 is opened, opens and set third gas flow controller 6, zero air or synthesis of air enter gas
It is mixed after the output pipe of phase reaction pipe 8, N2O5It is diluted.
In S2 step, when need to measure different humidity to generate required product ClNO2Influence when, open the 4th high pressure
Gas source 18 opens the 4th gas flow controller 15, the 5th gas flow controller 19, temperature humidity analyzer 9, opens calculating
Machine (computerized control humidity controlling unit 13 in the present embodiment) starts the software of humidity controlling unit 13, empty needed for setting
Air humidity degree and flow, zero air or synthesis of air are divided into the first branch and second by triple valve in the 4th high-pressure air source 18
Road, wherein zero air or synthetic gas enter humidifier tube 14 after the 4th gas flow controller 15 in the first branch and carry out
Humidification；Zero air or synthesis of air after the 5th gas flow controller 19 in second branch with come out from humidifier tube 14 zero
Air or mixing air mixing, and the setting flow in the control first branch and second branch is calculated by software, it is reached after mixing
To after target flow, mixed zero air or synthesis of air are detected and are fed back by temperature and humidity analyzer.
In the S3 step, by S2 step be prepared with certain humidity, temperature and flow zero air or synthesize sky
Gas and N2O5Entered after mixing among heterogeneous reaction pipe 11, and in heterogeneous reaction pipe 11 in solution tank 10
Know that the sodium chloride solution of concentration contacts and occur heterogeneous reaction, generates required product ClNO2。
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of preparation system of online normal concentration chloro-nitric acid, which is characterized in that including the first N2O5Preparation unit, humidity control
Unit processed and heterogeneous reaction unit；First N2O5Preparation unit is connected with humidity controlling unit, and anti-by gas phase
The connection of Ying Guanyu heterogeneous reaction unit；
First N2O5Preparation unit is used to prepare N2O5And by N2O5It is delivered to heterogeneous reaction unit；The humid control list
Member is for controlling the flow and humidity of delivery air；Sodium chloride solution and N in the heterogeneous reaction unit2O5It is anti-after contact
It answers, generates the chloro-nitric acid of normal concentration.
2. the preparation system of online normal concentration chloro-nitric acid according to claim 1, which is characterized in that described heterogeneous anti-
Answering unit includes heterogeneous reaction pipe, and solution tank is equipped in the heterogeneous reaction pipe, and it is molten to fill sodium chloride in the solution tank
Liquid.
3. the preparation system of online normal concentration chloro-nitric acid according to claim 1 or 2, which is characterized in that described first
N2O5Preparation unit includes the first high-pressure air source, ozone generator, the second high-pressure air source, third high-pressure air source and gas phase reaction
Pipe；First high-pressure air source is oxygen Standard Gases, and second high-pressure air source is nitrogen dioxide, and the third high-pressure air source is
For diluting N2O5Air；
First high-pressure air source is connected to by ozone generator with gas phase reaction pipe；Second high-pressure air source is directly and gas phase
Reaction tube connection；The third high-pressure air source is connected to the outlet of gas phase reaction pipe from pipeline.
4. the preparation system of online normal concentration chloro-nitric acid according to claim 3, which is characterized in that the ozone occurs
Device is equipped with on-line gas analysis instrument, and the on-line gas analysis instrument can be used in measuring O3、N2O5And ClNO2Concentration.
5. the preparation system of online normal concentration chloro-nitric acid according to claim 4, which is characterized in that the humid control
Unit includes the 4th high-pressure air source, humidifier tube and temperature humidity analyzer；It is zero air or synthesis in 4th high-pressure air source
Air；
The humidifier tube is used to increase the humidity of zero air or synthesis of air；The temperature humidity analyzer is for measuring and controlling
The humidity of zero air or synthesis of air, temperature and flow.
6. the preparation system of online normal concentration chloro-nitric acid according to claim 5, which is characterized in that first high pressure
Gas source, the second high-pressure air source are correspondingly provided with first flow controller, second flow controller and the 4th stream in third high-pressure air source
Amount controller；
4th high-pressure air source is connect with the first branch and second branch respectively by triple valve, the first branch and second
Branch road is corresponding to be equipped with the 4th flow controller and the 5th flow controller；The first flow controller is to the 5th flow control
Device processed is one of mass flowmenter, suspended body flowmeter, needle-valve or proportion magnetic valve.
7. the preparation system of online normal concentration chloro-nitric acid according to claim 6, which is characterized in that the gas phase reaction
The output pipe of pipe is equipped with switch valve, the 2nd N2O5Preparation unit is connected to by switch valve with heterogeneous reaction pipe, described
2nd N2O5Preparation unit is used to prepare N2O5And by N2O5It is delivered to heterogeneous reaction unit.
8. a kind of preparation method of online normal concentration chloro-nitric acid, which is characterized in that using online described in claim 1 to 7
The preparation system of normal concentration chloro-nitric acid, the preparation method comprises the following steps:
S1. the first N is utilized2O5Preparation unit prepares N2O5；
S2. the humidity and temperature of air are adjusted using humidity controlling unit；
4th high-pressure air source provide air a part through in the first branch the 4th flow controller and humidifier tube enter temperature
Humidometer, another part enters temperature humidity analyzer through the third flow controller in second branch, wet through temperature
It spends after analyzer is adjusted and exports the air having with certain temperature and humidity；
S3. using heterogeneous reaction unit style for normal concentration chloro-nitric acid.
9. the preparation method of online normal concentration chloro-nitric acid according to claim 8, which is characterized in that in the S1 step
In, the first high-pressure air source, the second high-pressure air source and third high-pressure air source are opened, and pass through first gas flow controller and second
Gas flow controller adjusts and NO2Flow；O2O is generated through ozone generator3, O3And NO2It is anti-in the gas phase of adjustable size
Interior generation N should be managed2O5。
10. the preparation method of online normal concentration chloro-nitric acid according to claim 8, which is characterized in that walked in the S3
In rapid, air and N with certain humidity, temperature and flow2O5It is entered after mixing in heterogeneous reaction pipe, heterogeneous
In reaction tube, N2O5Heterogeneous reaction occurs with the sodium chloride solution in solution tank, generates product ClNO2。
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