CN109395586B - Device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation reinforced chlorine dioxide - Google Patents
Device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation reinforced chlorine dioxide Download PDFInfo
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- CN109395586B CN109395586B CN201811528849.0A CN201811528849A CN109395586B CN 109395586 B CN109395586 B CN 109395586B CN 201811528849 A CN201811528849 A CN 201811528849A CN 109395586 B CN109395586 B CN 109395586B
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 100
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract description 36
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 239000000779 smoke Substances 0.000 claims abstract description 55
- 238000000926 separation method Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000010802 sludge Substances 0.000 claims description 8
- 239000013535 sea water Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 5
- 239000013505 freshwater Substances 0.000 claims description 4
- 239000003517 fume Substances 0.000 claims 3
- 238000007865 diluting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- 239000013589 supplement Substances 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
- 238000003915 air pollution Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013048 microbiological method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide, which comprises a dosing cabinet, wherein the dosing cabinet is communicated with a mixing cabinet through a metering pump I; the mixing cabinet is communicated with at least one venturi ejector liquid inlet through a variable frequency pump and a controllable flowmeter II in sequence; the venturi jet device air suction port is communicated with the middle part of the smoke exhaust pipe, and the venturi jet device outlet is communicated with the bottom of the side wall of the separation device through a pipeline; the bottom of the side wall of the separation device is provided with a water outlet communicated with the automatic valve, the middle part of the separation device is provided with a liquid level monitor, and the part of the separation device, which is close to the smoke outlet of the separation device, is provided with a smoke monitor. The invention combines hydrodynamic cavitation with chlorine dioxide solution denitration, can improve denitration efficiency, reduce chlorine dioxide consumption and cost, can realize better denitration effect in a wider pH value range, can discharge or recycle the treated liquid, is suitable for different occasions, and is beneficial to the improvement of the existing equipment.
Description
Technical Field
The invention relates to the technical field of atmospheric pollution control, in particular to a device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide.
Background
The ship bears more than 80% of the global trade total, the economy is high, but the atmospheric pollution of the ship is also serious. This makes the effect of atmospheric pollution of the ship more serious as the ship sails between coastal cities with developed economy and high population density. For both bollard and north sea, up to 80% of near-surface nitric oxide, nitrogen dioxide and sulfur dioxide concentrations in 2013 come from shipping.
According to MARPOL convention annex six, nitrogen oxide emissions must meet Tier iii standards since new vessels pass through the emissions control zone 1 month 1 day of 2016: the nitrogen oxide content in the exhaust gas of the diesel engine with the rotating speed lower than 130rpm is less than 3.4g/kWh. This value is 20% of the emission limit (17.0 g/kWh) for a 2000-built ship and 23.6% of the emission limit (14.4 g/kWh) for a 1-month 1-day 2011-built ship. To meet the latest standards, emissions must be reduced by more than 80%.
Sulfur Oxides (SO) in marine exhaust x ) Particulate matter (particulate matter, PM) can be removed by water scrubbing, and Nitrogen Oxides (NO) x ) More than 90% of the water is NO which is difficult to dissolve in water, and water denitration is difficult. Denitration is the key of integrated treatment of ship tail gas.
The denitration technology in industrial application comprises a Selective Catalytic Reduction (SCR), a selective non-catalytic reduction (SNCR), a plasma method, a liquid absorption method, an adsorption method, a microbiological method and other technologies, wherein the mature technologies are SCR and SNCR, but the technology has the problems of high cost, complex equipment process, catalyst poisoning and the like. So that no more ideal denitration technology exists so far.
Disclosure of Invention
Aiming at the technical problems, the device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide is provided. The invention strengthens NO by using a large amount of bubbles generated by cavitation and venturi tube and special chemical reaction conditions x Thereby economically and efficiently removing NO in the flue gas x 。
The invention is based on the following principle that chlorine dioxide will oxidize NO first, the main reaction process is as follows:
5NO+2ClO 2 +H 2 O＝5NO 2 +2HCl (1)
oxidation of NO to NO by chlorine dioxide 2 Thereafter, most of the NO is absorbed 2 Is HNO 3 The equation for the reaction is as follows:
5NO 2 +ClO 2 +3H 2 O＝5HNO 3 +HCl (2)
the total reaction chemistry equation of the above reaction process is:
4NO+ 3HClO 2 +2H 2 O＝4HNO 3 +3HCl (3)
the product of reaction (1) may also undergo the following reaction:
2NO 2 +H 2 O＝HNO 2 +HNO 3 (4)
chlorine dioxide hydrolyzes in aqueous solutions as follows:
2ClO 2 +H 2 O＝HClO 3 +HClO 2 (5)
the product of reaction (5) may also undergo the following reaction:
4NO+ 3HClO 2 +2H 2 O＝4HNO 3 +3HCl (6)
to improve ClO 2 Based on the principle, the denitration efficiency of the solution is as follows:
the device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide comprises a dosing cabinet, wherein the dosing cabinet is communicated with a mixing cabinet through a metering pump I, and a diluted solution sequentially enters the mixing cabinet through a metering pump II and a controllable flowmeter I (the controllable flowmeter I meters the liquid inlet amount of the metering pump II);
the mixing cabinet is communicated with at least one venturi ejector liquid inlet through a variable frequency pump or sequentially through a variable frequency pump and a controllable flowmeter II (the controllable flowmeter II sets the flow rate of liquid flowing through a pipeline and is used for adjusting the work of the variable frequency pump) or sequentially through a centrifugal pump and the controllable flowmeter II;
the venturi jet device air suction port is communicated with the middle part of the smoke exhaust pipe, and the venturi jet device outlet is communicated with the bottom of the side wall of the separation device through a pipeline;
a conversion valve is arranged at the position, close to the smoke outlet, of the smoke exhaust pipe, and when the smoke in the smoke exhaust pipe is treated by the Venturi ejector, the conversion valve is closed, so that the smoke cannot be exhausted from the smoke outlet of the smoke exhaust pipe; when the smoke in the smoke exhaust pipe is not treated by the Venturi ejector, the switching valve is opened, and the smoke can be exhausted from the smoke exhaust pipe and the smoke outlet.
The utility model discloses a sewage treatment device, including separator, automatic valve, separator, NO in the exhaust gas of separator exhaust port exhaust gas, separator lower extreme is equipped with the drain with mud cabinet intercommunication, the upper end is equipped with the separator exhaust port, separator lateral wall bottom is equipped with the outlet with the automatic valve intercommunication, the separator middle part is equipped with and is used for on-line continuous monitoring the liquid level monitor of liquid level in the separator, separator is close to separator exhaust port department is equipped with and is used for on-line continuous monitoring follow in the separator exhaust gas NO x A smoke monitor of content;
the liquid inlet of the venturi jet device is provided with a liquid inlet valve, and a pressure gauge and a pressure sensor are arranged between the liquid inlet of the venturi jet device and the liquid inlet valve;
the venturi jet outlet is provided with a pressure gauge and a pressure sensor and is communicated with the bottom of the side wall of the separation device through a liquid outlet valve;
the device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide further comprises a CPU unit for collecting data of the liquid level monitor, the smoke monitor and the pressure sensor and controlling the opening degree of the metering pump I, the automatic valve, the variable frequency pump, the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II.
When the liquid flows through the venturi jet device, vacuum is generated in the middle of the venturi jet device, and then gas is sucked into the smoke exhaust pipe. A large number of tiny bubbles are generated during gas-liquid mixing.
The liquid level signal measured by the liquid level monitor, the smoke concentration signal measured by the smoke monitor and the pressure signal measured by the pressure sensor are transmitted to the CPU unit, the CPU unit controls the opening of the automatic valve according to the liquid level signal, controls the opening of the metering pump I and the variable frequency pump or the variable frequency pump and the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II according to the smoke concentration signal, and controls the opening of the variable frequency pump or the variable frequency pump and the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II according to the pressure signal. When the measured liquid level signal is higher, the CPU unit sends out a signal for increasing the opening degree of the automatic valve; when the measured smoke concentration signal is higher, the CPU unit can send out signals for increasing the opening degrees of the metering pump I and the variable frequency pump or the variable frequency pump and the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II, and when the measured pressure signal is higher, the CPU unit can send out signals for reducing the opening degrees of the variable frequency pump or the variable frequency pump and the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II;
the mixing cabinet is provided with a homogenizer.
An electromagnetic valve is arranged between the air suction port of the Venturi ejector and the middle part of the smoke exhaust pipe, and valves are arranged between the sludge cabinet and the sewage outlet;
the liquid inlet valve and the liquid outlet valve are electromagnetic valves.
The diluted solution is seawater or fresh water.
The metering pump I and the metering pump II are pumps capable of accurately and quantitatively metering.
The other end of the automatic valve is communicated with the mixing cabinet.
When the smoke amount in the smoke exhaust pipe is changed, the number of the venturi jet devices which work can be adjusted according to the pressure in the smoke exhaust pipe, so that the stability of the smoke exhaust pressure is ensured; the liquid inlet valve corresponding to the non-working venturi jet device is closed, and the air suction port of the venturi jet device is closed; the working venturi jet device is characterized in that a liquid inlet valve corresponding to the working venturi jet device is opened, an air suction port of the venturi jet device is opened, and an outlet of the venturi jet device is opened.
The working principle of the invention is that chlorine dioxide reagent enters the mixing cabinet from the dosing cabinet through the metering pump I, meanwhile, the metering pump II supplements seawater or fresh water into the mixing cabinet, the mixed solution enters a pipeline through the variable frequency pump or sequentially through the variable frequency pump and the controllable flowmeter II or sequentially through the centrifugal pump and the controllable flowmeter II, negative pressure is generated at the air suction port when the liquid flows through the venturi jet device, flue gas in the smoke exhaust pipe is sucked into the venturi jet device, and oxidation absorption chemical reaction is generated between chlorine dioxide and NOx in the flue gas in a gas-liquid interface and a gas-phase environment inside bubbles. The waste liquid after denitration enters the separation device, sludge in the waste liquid is separated and discharged to the sludge cabinet, the solution in the waste liquid is discharged through the automatic valve or returns to the mixing cabinet again for recycling, and along with the consumption of the solution in the mixing cabinet, the chlorine dioxide reagent and the seawater or the fresh water are continuously supplemented into the mixing cabinet.
The invention combines hydrodynamic cavitation with chlorine dioxide solution denitration, can improve denitration efficiency, reduce chlorine dioxide consumption and cost, can realize better denitration effect in a wider pH value range, can discharge or recycle the treated liquid, is suitable for different occasions, and is beneficial to the improvement of the existing equipment.
The invention has the following advantages:
1. compared with other oxidation technologies, the cavitation combined chlorine dioxide oxidation technology is adopted, so that the denitration efficiency can be improved, the consumption of chlorine dioxide is reduced, and the cost is reduced;
2. the denitration effect of the solution is less influenced by the pH value, and the better denitration effect can be realized in a wider pH value range;
3. the invention adopts the equipment with simple structure, convenient installation and easy operation, thereby reducing the initial investment;
4. the waste liquid after washing can be discharged to the outside after being treated, can be recycled, is suitable for different occasions and is beneficial to the improvement of the existing equipment.
Based on the reasons, the invention can be widely popularized in the fields of air pollution control technology and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of an apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of an apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide in embodiment 2 of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in figure 1, the device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide comprises a dosing cabinet 1, wherein the dosing cabinet 1 is communicated with a mixing cabinet 3 through a metering pump I2, and a diluted solution sequentially enters the mixing cabinet 3 through a metering pump II 4 and a controllable flowmeter I17;
the mixing cabinet 3 is communicated with liquid inlets of a plurality of venturi ejectors 6 through a variable frequency pump 5 and a controllable flowmeter II 18;
the air suction port of the venturi jet device 6 is communicated with the middle part of the smoke exhaust pipe 7, and the outlet of the venturi jet device 6 is communicated with the bottom of the side wall of the separation device 8 through a pipeline;
a change-over valve 9 is arranged at the position of the smoke exhaust pipe 7 close to the smoke exhaust port;
the lower end of the separation device 8 is provided with a drain outlet communicated with the sludge cabinet 10, the upper end of the separation device 8 is provided with a separation device smoke outlet 11, the bottom of the side wall of the separation device 8 is provided with a drain outlet communicated with an automatic valve 12, the middle part of the separation device 8 is provided with a liquid level monitor 13 for continuously monitoring the liquid level in the separation device 8 on line, and the position of the separation device 8, which is close to the separation device smoke outlet 11, is provided with a device for continuously monitoring NO in smoke discharged from the separation device smoke outlet 11 on line x A smoke monitor 14 for content;
the liquid inlet of the venturi jet device 6 is provided with a liquid inlet valve 19, and a pressure gauge 20 and a pressure sensor 21 are arranged between the liquid inlet of the venturi jet device 6 and the liquid inlet valve 19;
the outlet of the venturi ejector 6 is provided with a pressure gauge 20 and a pressure sensor 21, and is communicated with the bottom of the side wall of the separation device 8 through a liquid outlet valve 22;
the device for removing nitrogen oxides in ship exhaust by hydrodynamic cavitation enhanced chlorine dioxide further comprises a CPU unit 16 for collecting data of the liquid level monitor 13, the smoke monitor 14 and the pressure sensor 21 and controlling the opening of the metering pump I2, the variable frequency pump 5, the controllable flow meter II 18 and the automatic valve 12.
The mixing cabinet 3 is provided with a homogenizer 15.
An electromagnetic valve 23 is arranged between the air suction port of the Venturi ejector 6 and the middle part of the smoke exhaust pipe 7, and valves are arranged between the sludge cabinet 10 and the sewage drain;
the liquid inlet valve 19 and the liquid outlet valve 22 are electromagnetic valves.
The diluted solution is seawater.
The metering pump I2 and the metering pump II 4 are pumps capable of accurately and quantitatively metering.
When the smoke amount in the smoke exhaust pipe 7 changes, the number of the venturi jet devices 6 which work can be adjusted according to the pressure in the smoke exhaust pipe 7; the non-working venturi jet device 6 is closed by the corresponding liquid inlet valve 19, and the air suction port of the venturi jet device 6 is closed; the working venturi jet device 6 is characterized in that a corresponding liquid inlet valve 19 is opened, an air suction port of the venturi jet device 6 is opened, and an outlet of the venturi jet device 6 is opened.
Chlorine dioxide reagent enters the mixing cabinet 3 from the dosing cabinet 1 through the metering pump I2, meanwhile, the metering pump II 4 supplements seawater into the mixing cabinet 3, the mixed solution sequentially enters a pipeline through the variable frequency pump 5 and the controllable flowmeter II 18, the liquid flows through the venturi jet device 6 to generate negative pressure at the air suction port, the smoke in the smoke exhaust pipe 7 is sucked into the venturi jet device 6, and the chlorine dioxide and NO in the smoke are absorbed into the venturi jet device 6 x The chemical reaction of oxidative absorption occurs in the gas-liquid interface and the gas-phase environment inside the bubbles. When the flue gas in the flue gas exhaust pipe 7 is treated by the venturi jet device 6, the switching valve 9 is closed, and the flue gas can not be exhausted from the flue gas outlet of the flue gas exhaust pipe 7. The waste liquid after denitration enters the separation device 8, sludge in the waste liquid is separated and discharged to the sludge cabinet 10, solution in the waste liquid is discharged through the automatic valve 12, chlorine dioxide reagent and seawater are continuously supplemented into the mixing cabinet 3 along with the consumption of the solution in the mixing cabinet 3, and the smoke monitor 14 continuously monitors NO in smoke discharged from a smoke outlet of the separation device 8 on line x The CPU unit 16 controls the opening of the metering pump I2 and the opening of the variable frequency pump 5 according to the smoke concentration signal, the liquid level monitor 13 continuously monitors the liquid level in the separation device 8 on line, the CPU unit 16 controls the opening of the automatic valve 12 according to the liquid level signal, and controls the opening of the variable frequency pump 5 and the opening of the controllable flowmeter II 18 according to the liquid inlet of the venturi jet device 6 and the pressure signal of the outlet of the venturi jet device 6 detected by the pressure sensor 21.
Example 2
As shown in fig. 2, a device for removing nitrogen oxides in ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide is different from the device for removing nitrogen oxides in ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide in embodiment 1 in that the other end of the automatic valve 12 is communicated with the mixing tank 3, and the solution in the waste liquid is returned to the mixing tank 3 for recycling through the automatic valve 12.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. The device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide is characterized by comprising a dosing cabinet, wherein the dosing cabinet is communicated with a mixing cabinet through a metering pump I, and a diluted solution sequentially enters the mixing cabinet through a metering pump II and a controllable flowmeter I;
the mixing cabinet is communicated with at least one venturi jet device liquid inlet through a variable frequency pump or sequentially through a variable frequency pump and a controllable flowmeter II or sequentially through a centrifugal pump and a controllable flowmeter II;
the venturi jet device air suction port is communicated with the middle part of the smoke exhaust pipe, and the venturi jet device outlet is communicated with the bottom of the side wall of the separation device through a pipeline;
a conversion valve is arranged at the position of the smoke exhaust pipe close to the smoke exhaust port;
the utility model discloses a sewage treatment device, including separator, automatic valve, separator, NO in the exhaust gas of separator exhaust port exhaust gas, separator lower extreme is equipped with the drain with mud cabinet intercommunication, the upper end is equipped with the separator exhaust port, separator lateral wall bottom is equipped with the outlet with the automatic valve intercommunication, the separator middle part is equipped with and is used for on-line continuous monitoring the liquid level monitor of liquid level in the separator, separator is close to separator exhaust port department is equipped with and is used for on-line continuous monitoring follow in the separator exhaust gas NO x A smoke monitor of content;
the liquid inlet of the venturi jet device is provided with a liquid inlet valve, and a pressure gauge and a pressure sensor are arranged between the liquid inlet of the venturi jet device and the liquid inlet valve;
the venturi jet outlet is provided with a pressure gauge and a pressure sensor and is communicated with the bottom of the side wall of the separation device through a liquid outlet valve;
the device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation enhanced chlorine dioxide further comprises a CPU unit for collecting data of the liquid level monitor, the smoke monitor and the pressure sensor and controlling the opening degree of the metering pump I, the automatic valve, the variable frequency pump, the controllable flowmeter II or the centrifugal pump and the controllable flowmeter II.
2. The apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide according to claim 1, wherein the mixing tank is provided with a homogenizer.
3. The device for removing nitrogen oxides in ship exhaust gas by hydrodynamic cavitation enhanced chlorine dioxide according to claim 1, wherein an electromagnetic valve is arranged between an air suction port of the venturi jet device and the middle part of the smoke exhaust pipe, and valves are arranged between the sludge cabinet and the sewage drain;
the liquid inlet valve and the liquid outlet valve are electromagnetic valves.
4. The apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide according to claim 1, wherein the diluting solution is seawater or fresh water.
5. The device for removing nitrogen oxides in ship exhaust gas by hydrodynamic cavitation enhanced chlorine dioxide according to claim 1, wherein the metering pump I and the metering pump II are pumps capable of precisely and quantitatively metering.
6. The apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide according to claim 1, wherein the other end of the automatic valve is communicated with the mixing tank.
7. The apparatus for removing nitrogen oxides from ship exhaust gas by hydrodynamic cavitation-enhanced chlorine dioxide according to claim 1, wherein the number of venturi ejectors operated is adjusted according to the pressure in the fume pipe when the fume amount in the fume pipe is varied; the liquid inlet valve corresponding to the non-working venturi jet device is closed, and the air suction port of the venturi jet device is closed; the working venturi jet device is characterized in that a liquid inlet valve corresponding to the working venturi jet device is opened, an air suction port of the venturi jet device is opened, and an outlet of the venturi jet device is opened.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811528849.0A CN109395586B (en) | 2018-12-13 | 2018-12-13 | Device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation reinforced chlorine dioxide |
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| CN201811528849.0A CN109395586B (en) | 2018-12-13 | 2018-12-13 | Device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation reinforced chlorine dioxide |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1398887A (en) * | 1971-09-08 | 1975-06-25 | Pennwalt Corp | Device for removing gaseous air impurities |
| US5204081A (en) * | 1991-05-03 | 1993-04-20 | Rio Linda Chemical Co., Ltd. | Process for the generation of chlorine dioxide |
| JP2001233292A (en) * | 2000-02-23 | 2001-08-28 | Mitsubishi Heavy Ind Ltd | Underwater discharge device for exhaust gas from ship |
| KR20100137220A (en) * | 2009-06-22 | 2010-12-30 | 주식회사 엔케이 | Apparatus for desulfurization and denitrification from exhaust gas of a ship |
| CN103007691A (en) * | 2012-12-12 | 2013-04-03 | 青岛双瑞海洋环境工程股份有限公司 | Method and equipment of integrally desulfurizing and denitrifying flue gas for marine gas turbine |
| KR20150111751A (en) * | 2014-03-26 | 2015-10-06 | 선일환경(주) | Chemical Cleaning Deodorizing Apparatus Using Venturi and Micro-bubbles |
| CN105289241A (en) * | 2015-09-24 | 2016-02-03 | 哈尔滨工程大学 | Combined desulphurization and denitration device and method of marine diesel engine |
| KR101590551B1 (en) * | 2014-11-04 | 2016-02-18 | 강림중공업 주식회사 | Exhaust gas cleaning system for ship |
| CN205323506U (en) * | 2015-12-10 | 2016-06-22 | 四川清源环境工程有限公司 | Chlorine dioxide oxidation nitric oxide's gas phase reaction ware |
| CN107875855A (en) * | 2017-11-14 | 2018-04-06 | 大连海事大学 | A kind of boat diesel engine exhaust emission integrated conduct method and device |
| WO2018099243A2 (en) * | 2017-11-03 | 2018-06-07 | Heraeus Precious Metal Technology (China) Co., Ltd. | Nox abatement method for precious metal refinery and recycling processes |
| CN209221878U (en) * | 2018-12-13 | 2019-08-09 | 大连海事大学 | A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040022707A1 (en) * | 2002-06-05 | 2004-02-05 | Exxonmobil Research And Engineering Company | Oxidation of NOx's with sodium chlorite in combination with a thermal NOx removal process |
| US8425866B2 (en) * | 2005-11-14 | 2013-04-23 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Control of emissions |
| US9873080B2 (en) * | 2012-01-09 | 2018-01-23 | ScioTech LLC | Processes and methods using chlorine dioxide to remove NOx and SOx from marine exhaust |
-
2018
- 2018-12-13 CN CN201811528849.0A patent/CN109395586B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1398887A (en) * | 1971-09-08 | 1975-06-25 | Pennwalt Corp | Device for removing gaseous air impurities |
| US5204081A (en) * | 1991-05-03 | 1993-04-20 | Rio Linda Chemical Co., Ltd. | Process for the generation of chlorine dioxide |
| JP2001233292A (en) * | 2000-02-23 | 2001-08-28 | Mitsubishi Heavy Ind Ltd | Underwater discharge device for exhaust gas from ship |
| KR20100137220A (en) * | 2009-06-22 | 2010-12-30 | 주식회사 엔케이 | Apparatus for desulfurization and denitrification from exhaust gas of a ship |
| CN103007691A (en) * | 2012-12-12 | 2013-04-03 | 青岛双瑞海洋环境工程股份有限公司 | Method and equipment of integrally desulfurizing and denitrifying flue gas for marine gas turbine |
| KR20150111751A (en) * | 2014-03-26 | 2015-10-06 | 선일환경(주) | Chemical Cleaning Deodorizing Apparatus Using Venturi and Micro-bubbles |
| KR101590551B1 (en) * | 2014-11-04 | 2016-02-18 | 강림중공업 주식회사 | Exhaust gas cleaning system for ship |
| CN105289241A (en) * | 2015-09-24 | 2016-02-03 | 哈尔滨工程大学 | Combined desulphurization and denitration device and method of marine diesel engine |
| CN205323506U (en) * | 2015-12-10 | 2016-06-22 | 四川清源环境工程有限公司 | Chlorine dioxide oxidation nitric oxide's gas phase reaction ware |
| WO2018099243A2 (en) * | 2017-11-03 | 2018-06-07 | Heraeus Precious Metal Technology (China) Co., Ltd. | Nox abatement method for precious metal refinery and recycling processes |
| CN107875855A (en) * | 2017-11-14 | 2018-04-06 | 大连海事大学 | A kind of boat diesel engine exhaust emission integrated conduct method and device |
| CN209221878U (en) * | 2018-12-13 | 2019-08-09 | 大连海事大学 | A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas |
Non-Patent Citations (2)
| Title |
|---|
| 常敬州 ; 朱国金 ; .船舶尾气脱硫脱硝应用技术研究与发展趋势.航海.2016,(第05期),第38-41页. * |
| 船舶尾气脱硫脱硝应用技术研究与发展趋势;常敬州;朱国金;;航海(第05期);第38-41页 * |
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