CN109395586A - A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas - Google Patents
A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas Download PDFInfo
- Publication number
- CN109395586A CN109395586A CN201811528849.0A CN201811528849A CN109395586A CN 109395586 A CN109395586 A CN 109395586A CN 201811528849 A CN201811528849 A CN 201811528849A CN 109395586 A CN109395586 A CN 109395586A
- Authority
- CN
- China
- Prior art keywords
- separator
- venturi ejector
- chlorine dioxide
- nitrogen oxides
- hydrodynamic cavitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 69
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 28
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 239000000779 smoke Substances 0.000 claims abstract description 42
- 239000003546 flue gas Substances 0.000 claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000012806 monitoring device Methods 0.000 claims abstract description 7
- 239000010802 sludge Substances 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000013535 sea water Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 6
- 239000013505 freshwater Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000460 chlorine Substances 0.000 abstract description 7
- 229910052801 chlorine Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 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 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/108—Halogens or halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
Abstract
The invention discloses the device that a kind of Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas, including dosing cabinet, dosing cabinet is connected to by metering pump I with mixing cabinet；Mixing cabinet passes sequentially through variable frequency pump and controllable flow meter II and is connected to at least one venturi ejector liquid inlet；It is connected in the middle part of venturi ejector air entry and smoke exhaust pipe, the outlet of venturi ejector is connected to by pipeline with separator sidewall bottom；Separator sidewall bottom is equipped with the discharge outlet being connected to automatic valve, and leve monitor is equipped in the middle part of separator, and separator is equipped with flue gas monitoring device at separator smoke outlet.The present invention combines ClO 2 solution denitration using Hydrodynamic cavitation, denitration efficiency can be improved, reduce Chlorine, reduce cost, preferable denitration effect can be realized in wide pH value range, treated, and liquid can be discharged or be recycled, and be suitable for different occasions, be conducive to the transformation of existing equipment.
Description
Technical field
Strengthen chlorine dioxide the present invention relates to technical field of air pollution control more particularly to a kind of Hydrodynamic cavitation and removes ship
The device of nitrogen oxides in vessel exhaust.
Background technique
Ship carries 80% or more of global trade total amount, and economy is very high, but ship atmosphere pollution is also very tight
Weight.Since ship's navigation is between the big coastal cities of economically developed, the density of population, this makes the influence of ship atmosphere pollution more
It is serious." 2013Hong Kong Emission Inventory Report " display, shipping in 2013 to the SOx in Hong Kong and
The contribution of NOx emission is respectively 50% and 31%.For the Baltic Sea and the North Sea, 2013 up to 80% one oxygen of near surface
Change nitrogen, nitrogen dioxide and sulfur dioxide concentration come from shipping.
It is provided according to MARPOL pact supplemental provisions six, when from January 1st, 2016, new ship passed through emission control area later, nitrogen
Emissions of oxides must satisfy III standard of Tier, it may be assumed that revolving speed is small lower than the nox in exhaust content of the diesel engine of 130rpm
In 3.4g/kWh.This numerical value is the 20% of the emission limit (17.0g/kWh) of construction ship in 2000, is on January 1st, 2011
The 23.6% of ship emission limit (14.4g/kWh) is built later.Meet newest standard, it is necessary to 80% or more emission reduction.
Ship tail gas sulphur oxide (SOx), particulate matter (particulate matter, PM) can pass through water elution
It removes, and nitrogen oxides (NOx) in 90% the above are the NO for being insoluble in water, it is difficult to wash denitration.Denitration is integrated treatment ship
The key of tail gas.
The selective catalytic reduction method of denitration technology (SCR) in industrial application, selective non-catalytic reduction method (SNCR), etc.
The technologies such as processes, liquid absorption method, absorption method, microbial method wherein more mature technology is SCR and SNCR, but are deposited
At high cost, the problems such as apparatus and process is complicated and catalyst poisoning.So up to the present being taken off without a kind of more satisfactory
Nitre technology.
Summary of the invention
For the above technical problems, a kind of Hydrodynamic cavitation is provided and strengthens nitrogen oxygen in chlorine dioxide removing ship tail gas
The device of compound.The a large amount of bubbles and special chemical reaction condition that the present invention is generated using cavitation and Venturi tube, strengthen two
Solutions of chlorine is aoxidized to NOxOxidative absorption, thus economical and efficient remove NO in flue gasx。
The present invention is based on following principle, chlorine dioxide first can aoxidize NO, and key reaction process is as follows:
5NO+2ClO2+H2O=5NO2+2HCl (1)
NO is oxidized to NO by chlorine dioxide2Later, most of NO can be absorbed2For HNO3, the equation of reaction is as follows:
5NO2+ClO2+3H2O=5HNO3+HCl (2)
The overall reaction chemical equation of the above reaction process are as follows:
4NO+3HClO2+2H2O=4HNO3+3HCl (3)
The product of reaction (1) also occurs that following reaction:
2NO2+H2O=HNO2+HNO3 (4)
Chlorine dioxide can hydrolyze in aqueous solution, react as follows:
2ClO2+H2O=HClO3+HClO2 (5)
The product of reaction (5) also occurs that following reaction:
4NO+3HClO2+2H2O=4HNO3+3HCl (6)
In order to improve ClO2The denitration efficiency of solution is based on principles above, The technical solution adopted by the invention is as follows:
A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas, including dosing cabinet, described
Dosing cabinet is connected to by metering pump I with mixing cabinet, and dilute solution passes sequentially through I (flow-controllable of metering pump II and controllable flow meter
The liquid inlet volume of the I metering metering pump II of meter) enter the mixing cabinet；
The mixing cabinet is by variable frequency pump or passes sequentially through variable frequency pump and (the setting liquid of controllable flow meter II of controllable flow meter II
Body flows through the flow of pipeline, for adjusting the work of the variable frequency pump) or pass sequentially through centrifugal pump and controllable flow meter II with to
Few venturi ejector liquid inlet connection；
Be connected in the middle part of the venturi ejector air entry and smoke exhaust pipe, the venturi ejector outlet by pipeline and
The connection of separator sidewall bottom；
The smoke exhaust pipe is equipped with switching valve at its smoke outlet, when the smoke evacuation inner tube smoke is by the venturi jet stream
When device processing, the switching valve is closed, and flue gas cannot be discharged by the smoke exhaust pipe smoke outlet；When the smoke evacuation inner tube smoke not
When being handled with the venturi ejector, the switching valve is opened, and flue gas can be discharged by the smoke exhaust pipe smoke outlet.
The separator lower end is equipped with the sewage draining exit being connected to sludge tank, and upper end is equipped with separator smoke outlet, described
Separator sidewall bottom is equipped with the discharge outlet being connected to automatic valve, is equipped in the middle part of the separator and is used for on-line continuous monitoring
The leve monitor of liquid level in the separator, the separator are equipped at the separator smoke outlet and use
NO in flue gas is discharged from the separator smoke outlet in on-line continuous monitoringxThe flue gas monitoring device of content；
Venturi ejector liquid inlet is equipped with liquid feed valve, venturi ejector liquid inlet and the feed liquor
Pressure gauge and pressure sensor are equipped between valve；
The venturi ejector outlet is equipped with pressure gauge and pressure sensor, and passes through liquid valve and the separator
Sidewall bottom connection；
The device that the Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas further includes acquiring the liquid
Position monitor, the flue gas monitoring device and the pressure sensor data and control the metering pump I, the automatic valve and institute
The CPU for stating variable frequency pump or the variable frequency pump and controllable flow meter II or the centrifugal pump and II aperture of controllable flow meter is mono-
Member.
When liquid flows through the venturi ejector, vacuum, Jin Er can be generated in the middle part of the venturi ejector
Gas is sucked in the smoke exhaust pipe.A large amount of micro-bubbles can be generated when gas-liquid mixed.
The surveyed liquid level signal of the leve monitor, the surveyed flue gas concentration signal of the flue gas monitoring device and the pressure pass
Sensor survey venturi ejector liquid inlet and the venturi ejector outlet pressure signal to be transmitted to the CPU mono-
Member, the CPU element control the automatic valve opening according to liquid level signal, control the metering pump I according to flue gas concentration signal
With the aperture of the variable frequency pump or the variable frequency pump and controllable flow meter II or the centrifugal pump and the controllable flow meter II, root
The variable frequency pump or the variable frequency pump and controllable flow meter II or the centrifugal pump and the flow-controllable are controlled according to pressure signal
Count II aperture.When the liquid level signal surveyed is higher, the CPU element, which can issue, increases the automatic valve opening amount signal；Work as institute
When the flue gas concentration signal of survey is higher, the CPU element, which can issue, increases the metering pump I and the variable frequency pump or the frequency conversion
Pump and controllable flow meter II or the centrifugal pump and II opening amount signal of controllable flow meter, when institute's measuring pressure signal is higher,
The CPU element can issue reduce the variable frequency pump or the variable frequency pump and controllable flow meter II or the centrifugal pump and it is described can
Control flow meter II opening amount signal；
The mixing cabinet is equipped with homogenizer.
It is equipped with solenoid valve between in the middle part of the venturi ejector air entry and the smoke exhaust pipe, the sludge tank and described
Valve is equipped between sewage draining exit；
The liquid feed valve and the liquid valve are solenoid valve.
The dilute solution is seawater or fresh water.
The metering pump I and the metering pump II be can precisely measuring fixed amount pump.
The other end of the automatic valve is connected to the mixing cabinet.
When exhaust gas volumn changes in the smoke exhaust pipe, the text of work can be adjusted according to the pressure in the smoke exhaust pipe
The quantity of ejector in mound, it is ensured that the stabilization for pressure of discharging fume；Idle venturi ejector, corresponding liquid feed valve close
It closes, the venturi ejector air entry is closed；The venturi ejector of work, corresponding liquid feed valve are opened, are described
Venturi ejector air entry is opened, venturi ejector outlet is opened.
The operation principle of the present invention is that Chlorine reagent enters described mix from the dosing cabinet by the metering pump I
Close cabinet, while the metering pump II mends seawater or fresh water into the mixing cabinet, mixed solution pass through the variable frequency pump or
It passes sequentially through variable frequency pump and controllable flow meter II or passes sequentially through centrifugal pump and controllable flow meter II enters in pipeline, liquid flow
Negative pressure can be generated in air entry through the venturi ejector, the flue gas in the smoke exhaust pipe is inhaled into the venturi ejector
In, the chemistry that oxidative absorption occurs under the gaseous environment inside gas-liquid interface and bubble for the NOx in chlorine dioxide and flue gas is anti-
It answers.Waste liquid after denitration enters the separator, and the sludge in waste liquid is separated to and is discharged into the sludge tank, gives up
Solution in liquid exhausts or comes back to the mixing cabinet by the automatic valve and is recycled, with molten in the mixing cabinet
The consumption of liquid, Chlorine reagent and seawater or fresh water are continuously replenished in the mixing cabinet.
The present invention combines ClO 2 solution denitration using Hydrodynamic cavitation, and denitration efficiency can be improved, and reduces chlorine dioxide
Dosage reduces cost, preferable denitration effect can be realized in wide pH value range, treated, and liquid can be discharged
Or be recycled, it is suitable for different occasions, is conducive to the transformation of existing equipment.
The invention has the following advantages that
1, compared with other oxidation technologies, Chlorine Dioxide Oxidation technology is combined using cavitation, denitration efficiency can be improved, subtract
Few Chlorine, reduces cost；
2, the denitration effect of solution is influenced smaller by pH value, and preferable denitration can be realized in wide pH value range
Effect；
3, the present invention is simple using device structure, facilitates installation, is easily operated, reduces initial outlay；
4, the waste liquid after washing can be discharged to the external world after treatment, can also be recycled, and be suitable for different occasions, have
Conducive to the transformation of existing equipment.
The present invention can be widely popularized in fields such as air pollution control techniques based on the above reasons.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that a kind of Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas in the embodiment of the present invention 1
Device structural schematic diagram.
Fig. 2 is that a kind of Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas in the embodiment of the present invention 2
Device structural schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas, including add
Medicine-chest 1, the dosing cabinet 1 are connected to by metering pump I 2 with mixing cabinet 3, and dilute solution passes sequentially through metering pump II 4 and controllable flow
Meter I 17 enters the mixing cabinet 3；
The mixing cabinet 3 is connected by variable frequency pump 5 and controllable flow meter II 18 and multiple 6 liquid inlets of venturi ejector
It is logical；
It is connected in the middle part of 6 air entry of venturi ejector and smoke exhaust pipe 7, the outlet of venturi ejector 6 passes through pipe
Road is connected to 8 sidewall bottom of separator；
The smoke exhaust pipe 7 is equipped with switching valve 9 at its smoke outlet；
8 lower end of separator is equipped with the sewage draining exit being connected to sludge tank 10, and upper end is equipped with separator smoke outlet 11,
8 sidewall bottom of separator is equipped with the discharge outlet being connected to automatic valve 12, is equipped in the middle part of the separator 8 for online
The leve monitor 13 of liquid level in the separator 8 is continuously monitored, the separator 8 is arranged close to the separator
It is equipped at mouth 11 and NO in flue gas is discharged from the separator smoke outlet 11 for on-line continuous monitoringxThe flue gas monitoring of content
Device 14；
6 liquid inlet of venturi ejector is equipped with liquid feed valve 19,6 liquid inlet of venturi ejector and described
Pressure gauge 20 and pressure sensor 21 are equipped between liquid feed valve 19；
The venturi ejector 6 outlet is equipped with pressure gauge 20 and pressure sensor 21, and by liquid valve 22 with it is described
The connection of 8 sidewall bottom of separator；
The device that the Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas further includes acquiring the liquid
Position monitor 13, the flue gas monitoring device 14 and the pressure sensor 21 data and control the metering pump I 2, the change
The CPU element 16 of frequency pump 5,12 aperture of controllable flow meter II 18 and the automatic valve.
The mixing cabinet 3 is equipped with homogenizer 15.
6 air entry of venturi ejector and the smoke exhaust pipe are equipped with solenoid valve 23, the sludge tank 10 between 7 middle part
Valve is equipped between the sewage draining exit；
The liquid feed valve 19 and the liquid valve 22 are solenoid valve.
The dilute solution is seawater.
The metering pump I 2 and the metering pump II 4 be can precisely measuring fixed amount pump.
It, can be according to the adjustment work of the pressure in the smoke exhaust pipe 7 when exhaust gas volumn changes in the smoke exhaust pipe 7
The quantity of venturi ejector 6；Idle venturi ejector 6, the corresponding closing of liquid feed valve 19, the venturi
6 air entry of ejector is closed；The venturi ejector 6 of work, the corresponding opening of liquid feed valve 19, the venturi jet stream
6 air entry of device is opened, the venturi ejector 6 outlet is opened.
Chlorine reagent enters the mixing cabinet 3, while the meter from the dosing cabinet 1 by the metering pump I 2
Amount pump II 4 mends seawater into the mixing cabinet 3, and mixed solution passes sequentially through variable frequency pump 5 and controllable flow meter II 18 enters
Into pipeline, liquid, which flows through the venturi ejector 6, to generate negative pressure in air entry, and the flue gas in the smoke exhaust pipe 7 is inhaled
Enter in the venturi ejector 6, the NO in chlorine dioxide and flue gasxGaseous environment inside gas-liquid interface and bubble issues
The chemical reaction of raw oxidative absorption.When flue gas is handled by the venturi ejector 6 in the smoke exhaust pipe 7, the switching valve 9
It closes, flue gas cannot be arranged the discharge of 7 mouths by the smoke exhaust pipe.Waste liquid after denitration enters the separator 8, by waste liquid
In sludge separate and be discharged into the sludge tank 10, the solution in waste liquid is exhausted by the automatic valve 12, with institute
The consumption of solution in mixing cabinet 3 is stated, Chlorine reagent and seawater are continuously replenished in the mixing cabinet 3, the flue gas monitoring
14 on-line continuous monitoring of device NO from 8 smoke outlet of separator discharge flue gasxContent, it is described according to flue gas concentration signal
CPU element 16 controls 5 aperture of the metering pump I 2 and the variable frequency pump, divides described in 13 on-line continuous monitoring of leve monitor
From liquid level in device 8, the CPU element 16 controls 12 aperture of automatic valve according to liquid level signal, according to the pressure
Sensor 21 is surveyed described in 6 liquid inlet of venturi ejector and 6 outlet pressure signal of venturi ejector control
II 18 aperture of variable frequency pump 5 and controllable flow meter.
Embodiment 2
As shown in Fig. 2, a kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas, with reality
It applies a kind of Hydrodynamic cavitation described in example 1 and strengthens the difference of the device of nitrogen oxides in chlorine dioxide removing ship tail gas and be, institute
The other end for stating automatic valve 12 is connected to the mixing cabinet 3, and the solution in waste liquid comes back to described by the automatic valve 12
Cabinet 3 is mixed to be recycled.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (7)
1. the device that a kind of Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas, which is characterized in that including adding
Medicine-chest, the dosing cabinet are connected to by metering pump I with mixing cabinet, and dilute solution passes sequentially through metering pump II and controllable flow meter I
Into the mixing cabinet；
The mixing cabinet is by variable frequency pump or passes sequentially through variable frequency pump and controllable flow meter II or passes sequentially through centrifugal pump and controllable
Flow meter II is connected to at least one venturi ejector liquid inlet；
Be connected in the middle part of the venturi ejector air entry and smoke exhaust pipe, the venturi ejector outlet pass through pipeline with separate
The connection of device sidewall bottom；
The smoke exhaust pipe is equipped with switching valve at its smoke outlet；
The separator lower end is equipped with the sewage draining exit being connected to sludge tank, and upper end is equipped with separator smoke outlet, the separation
Device sidewall bottom is equipped with the discharge outlet being connected to automatic valve, is equipped in the middle part of the separator for described in on-line continuous monitoring
The leve monitor of liquid level in separator, the separator at the separator smoke outlet be equipped with for
Line continuously monitors the NO from separator smoke outlet discharge flue gasxThe flue gas monitoring device of content；
Venturi ejector liquid inlet is equipped with liquid feed valve, venturi ejector liquid inlet and the liquid feed valve it
Between be equipped with pressure gauge and pressure sensor；
The venturi ejector outlet is equipped with pressure gauge and pressure sensor, and passes through liquid valve and the separator side wall
Bottom connection；
The device that the Hydrodynamic cavitation strengthens nitrogen oxides in chlorine dioxide removing ship tail gas further includes acquiring the liquid level prison
It surveys the data of device, the flue gas monitoring device and the pressure sensor and controls the metering pump I, the automatic valve and the change
The CPU element of frequency pump or the variable frequency pump and controllable flow meter II or the centrifugal pump and II aperture of controllable flow meter.
2. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
It is characterized in that, the mixing cabinet is equipped with homogenizer.
3. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
It is characterized in that, is equipped with solenoid valve, the sludge tank and institute between the venturi ejector air entry and smoke exhaust pipe middle part
It states and is equipped with valve between sewage draining exit；
The liquid feed valve and the liquid valve are solenoid valve.
4. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
It is characterized in that, the dilute solution is seawater or fresh water.
5. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
Be characterized in that, the metering pump I and the metering pump II be can accurate measuring fixed amount pump.
6. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
It is characterized in that, the other end of the automatic valve is connected to the mixing cabinet.
7. Hydrodynamic cavitation according to claim 1 strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas,
It is characterized in that, it, can be according to the adjustment work of the pressure in the smoke exhaust pipe when exhaust gas volumn changes in the smoke exhaust pipe
The quantity of venturi ejector；Idle venturi ejector, corresponding liquid feed valve closing, the venturi jet stream
Device air entry is closed；The venturi ejector of work, corresponding liquid feed valve opening, the venturi ejector air entry
It opens, venturi ejector outlet is opened.
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Cited By (1)
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| CN111229006A (en) * | 2020-03-11 | 2020-06-05 | 山东师范大学 | Method for denitration by using chlorine dioxide-containing liquid |
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