CN111715059A - Device for absorbing CO2 in ship tail gas and method for absorbing and solidifying CO2 - Google Patents
Device for absorbing CO2 in ship tail gas and method for absorbing and solidifying CO2 Download PDFInfo
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- CN111715059A CN111715059A CN201910217968.2A CN201910217968A CN111715059A CN 111715059 A CN111715059 A CN 111715059A CN 201910217968 A CN201910217968 A CN 201910217968A CN 111715059 A CN111715059 A CN 111715059A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000005262 decarbonization Methods 0.000 claims abstract description 49
- 230000008929 regeneration Effects 0.000 claims abstract description 28
- 238000011069 regeneration method Methods 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 24
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 144
- 239000007789 gas Substances 0.000 claims description 50
- 239000000243 solution Substances 0.000 claims description 47
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 44
- 239000003546 flue gas Substances 0.000 claims description 44
- 239000007921 spray Substances 0.000 claims description 25
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 18
- 238000011282 treatment Methods 0.000 claims description 8
- 239000003814 drug Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 25
- 229910002092 carbon dioxide Inorganic materials 0.000 description 22
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 238000005261 decarburization Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 alkyl alcohol amines Chemical class 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/62—Carbon oxides
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Sustainable Development (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a device for absorbing CO2 in ship tail gas and a method for absorbing and solidifying CO2, which comprises the following steps: the device comprises a marine diesel engine, an exhaust pipe, a decarbonization tower, a regeneration tank, a sedimentation tank, a solid-liquid separation device and a circulating pump; the gas outlet end of the marine diesel engine is connected with one end of the exhaust pipe, and the other end of the exhaust pipe is connected with the gas inlet end of the decarbonization tower; the decarbonization tower is connected with the regeneration tank; the regeneration tank is connected with the sedimentation tank; the sedimentation tank is connected with the solid-liquid separation device; the solid-liquid separation device comprises: a solid collecting bin and a clear liquid pool; the clear liquid pool is connected with the decarbonization tower through the circulating pump. By applying the embodiment of the invention, emission reduction can be realized, the natural environment is protected, the damage to the environment is reduced, and other economic values can be created by changing waste into valuable.
Description
Technical Field
The invention relates to the technical field of tail gas treatment, in particular to a device for absorbing CO2 in ship tail gas and a method for absorbing and solidifying CO 2.
Background
Marine transportation is safe and cheap as one of the main transportation forms, and has the irreplaceable advantages compared with other transportation forms. Therefore, the marine transportation industry develops rapidly, the total transportation volume is continuously enlarged, the transportation forms are increasing day by day, and the tonnage is increased rapidly. However, the pollution of marine transportation to the ecological environment is also increasing after prosperous development. The pollutant discharged by the marine diesel engine is close to 10% of the total pollutant discharge of the world, and the marine exhaust emission becomes a main pollution source in some areas with dense routes and large ship flow or ports and the like. If not controlled in time, the method can bring immeasurable harm to the environment which human beings depend on for living.
Thus reducing ship CO2The emission is an important measure for protecting the ecological environment if the CO in the ship tail gas can be treated2Absorbing solidified, solidified CO2Stable chemical performance, small volume, and can be safely and economically stored on ships. Solidified CO2Can be used as chemical raw material and building material, if the solidified CO is used2The carbon emission of ships of shipping companies can be solved by using or selling the carbon emission-reducing agent, so that a theoretical basis is laid for realizing green shipping.
Disclosure of Invention
The invention aims to provide a device for absorbing CO2 in ship tail gas and a method for absorbing and solidifying CO2, and aims to solve the problems that CO2 in the existing ship tail gas is directly discharged and pollutes the environment.
In order to achieve the above object, the present invention provides an apparatus for absorbing CO2 in ship exhaust gas, comprising: the device comprises a marine diesel engine, an exhaust pipe, a decarbonization tower, a regeneration tank, a sedimentation tank, a solid-liquid separation device and a circulating pump;
the gas outlet end of the marine diesel engine is connected with one end of the exhaust pipe, and the other end of the exhaust pipe is connected with the gas inlet end of the decarbonization tower;
the decarbonization tower is connected with the regeneration tank;
the regeneration tank is connected with the sedimentation tank;
the sedimentation tank is connected with the solid-liquid separation device;
the solid-liquid separation device comprises: a solid collecting bin and a clear liquid pool;
the clear liquid pool is connected with the decarbonization tower through the circulating pump.
Preferably, the method further comprises the following steps: the system comprises a flue gas cooler, a blower, a first flue gas analyzer and a second flue gas analyzer;
between the marine diesel engine and the decarbonization tower, the inlet end of the flue gas cooler is connected with the exhaust pipe of the marine diesel engine, the gas outlet end of the flue gas cooler is connected with the inlet end of the air blower, and the gas outlet end of the air blower is connected with the input end of the first flue gas analyzer; the flue gas cooler, the blower, the first flue gas analyzer and the decarbonization tower are connected through pipelines;
the first flue gas analyzer is positioned on one side of the air inlet of the decarbonizing tower, and the second flue gas analyzer is positioned on one side of the air outlet of the top of the decarbonizing tower.
In one implementation, the method further comprises: a first dosing funnel and a second dosing funnel;
the first dosing funnel is arranged at the upper part of the regeneration tank;
the second dosing funnel is arranged at the upper part of the clear liquid pool.
Preferably, the method further comprises the following steps: a bypass pipe and a bypass port;
the bypass pipe is arranged between the marine diesel engine and the flue gas cooler and is connected with the exhaust pipe;
the bypass port is positioned at the bottom of the bypass pipe and is connected with the flue gas cooler.
In one implementation, the decarbonization column comprises: the spraying device comprises a demister, at least one spraying pipe and at least one injection pipe, wherein the demister is positioned above the at least one spraying pipe and the at least one injection pipe.
Preferably, the at least one spray pipe is located at an upper portion of the at least one shower pipe;
wherein the at least one shower comprises: the first spray pipe and the second spray pipe are arranged in the spray pipe;
the at least one injection pipe includes: a first injection pipe and a second injection pipe;
the first spraying pipe, the second spraying pipe, the first spraying pipe and the second spraying pipe are same in height distance.
Preferably, the clear liquid pool stores NaOH solution.
The invention also provides a method of absorbing solidified CO2, the method comprising:
collecting tail gas in an exhaust pipe of a marine diesel engine, and cooling;
feeding the cooled tail gas into a decarbonization tower, enabling the cooled tail gas to be in countercurrent contact with a NaOH solution sprayed in the decarbonization tower, discharging the treated tail gas from the top of the tower after multiple spraying treatments, connecting the decarbonization tower with a clear liquid tank through a circulating pump, wherein the clear liquid tank is used for containing the NaOH solution, and pumping the NaOH solution in the clear liquid tank to the decarbonization tower for spraying;
decarbonizing the NaOH waste liquid subjected to tail gas treatment, feeding the treated NaOH waste liquid into a regeneration tank through a return pipe, reacting with CaO solid particles in the regeneration tank, precipitating, and performing solid-liquid separation;
and (4) putting the NaOH solution subjected to solid-liquid separation into a clear liquid pool, and pumping to a decarbonizing tower.
By applying the embodiment of the invention, emission reduction can be realized, the natural environment is protected, the damage to the environment is reduced, and the emission reduction can be realized whileAbsorbing and solidifying CO2, solidifying the solidified CO2Can create other economic values and change waste into valuable. Thereby protecting natural environment and reducing CO of ships2And the damage to the environment is discharged.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is another schematic structural diagram of an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-2. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1, the invention provides an apparatus for absorbing CO2 in ship exhaust gas, comprising: the system comprises a marine diesel engine 1, an exhaust pipe 2, a decarbonization tower 8, a regeneration tank 9, a sedimentation tank 11, a solid-liquid separation device 12 and a circulating pump 15; the gas outlet end of the marine diesel engine 1 is connected with one end of the exhaust pipe 2, and the other end of the exhaust pipe 2 is connected with the gas inlet end of the decarbonization tower 8; the decarbonization tower 8 is connected with the regeneration tank 9; the regeneration tank 9 is connected with the sedimentation tank 11; the sedimentation tank 11 is connected with the solid-liquid separation device 12; the solid-liquid separation device 12 includes: a solid collecting bin 13 and a clear liquid tank 14; the clear liquid pool 14 is connected with the decarbonization tower 8 through the circulating pump 15.
It can be understood that the marine diesel engine 1 dischargesThe tail gas enters a decarbonization tower 8 through an exhaust pipe 2, and the decarbonization tower 8 is used for absorbing CO in the tail gas of the marine diesel engine2And (4) carrying out decarburization treatment. In the embodiment of the invention, the decarbonization tower 8 performs decarbonization through a decarbonization solution, specifically, the decarbonization solution is a NaOH solution, the decarbonized NaOH solution enters the regeneration tank 9 from the bottom of the decarbonization tower 8, and the regeneration tank 9 is used for processing the decarbonized NaOH solution to obtain a regenerated NaOH solution.
The regeneration tank 9 is used for solidifying CO in the absorption liquid2The chemical of (2) is CaO solid particles, the regeneration tank 9 is also provided with a heating device, and the heat energy of the heating device comes from the ship waste heat, so that the energy can be saved.
Then the CO in the ship tail gas is treated by a sedimentation tank 112CaCO product after curing3Precipitating; then the solidified product CaCO is separated by a solid-liquid separation device 123Separating from the solution. A solids collection bin 13 for collecting CO2CaCO product after curing3And then other reuse is performed.
In the embodiment of the invention, the clear liquid tank 14 stores NaOH solution obtained by solid-liquid separation; the circulating pump 15 pumps the absorbent NaOH in the clear liquid pool into the decarbonizing tower 8 for the decarbonizing tower 8 to absorb CO in the tail gas2. And a closed circulating system is formed, the absorption liquid NaOH can be recycled, and when the mass fraction of the absorption liquid NaOH solution is reduced, the medicine NaOH is added.
Specifically, still include: a flue gas cooler 5, a blower 6, a first flue gas analyzer 7 and a second flue gas analyzer 17; between the marine diesel engine 1 and the decarbonization tower 8, the inlet end of the flue gas cooler 5 is connected with the exhaust pipe of the marine diesel engine 1, the outlet end of the flue gas cooler 5 is connected with the inlet end of the blower 6, and the outlet end of the blower 6 is connected with the input end of the first flue gas analyzer 7; the flue gas cooler 5, the blower 6, the first flue gas analyzer 7 and the decarbonization tower 8 are connected through pipelines; the first flue gas analyzer 7 is located on one side of an air inlet of the decarbonizing tower 8, and the second flue gas analyzer 17 is located on one side of an air outlet of the top of the decarbonizing tower 8.
Between the marine diesel engine 1 and the decarbonizing tower 8, the flue gas cooler 5 is used for reducing the exhaust temperature of the marine diesel engine, and can be cooled by adopting a fresh water medium, and the flue gas temperature can be adjusted at will within the range of 25-400 ℃. The blower 6 sends the ship tail gas cooled by the flue gas cooler 5 into the decarbonization tower 8 from the bottom of the decarbonization tower. The first flue gas analyzer 7 is used for measuring the types and the contents of components in the flue gas at the air inlet of the decarbonizing tower 8; the second flue gas analyzer 17 is used for measuring the types and the contents of the components in the flue gas at the exhaust port at the top of the decarbonizing tower 8. The change of the types and the content of the components in the smoke are compared through the first smoke analyzer 7 and the second smoke analyzer 17.
In an implementation manner of the present invention, the method further includes: a first medicine adding funnel 10 and a second medicine adding funnel 16. The first dosing funnel 10 is arranged at the upper part of the regeneration tank 9; for adding solid particles of CaO to the regeneration tank 9. The second medicine adding funnel 16 is disposed at the upper portion of the clear liquid tank 14, and is used for adding a medicine NaOH solution into the clear liquid tank 14 when the mass fraction of the solution decreases.
In an implementation manner of the present invention, the method further includes: a bypass pipe 3, a bypass port 4; the by-pass pipe 3 is arranged between the marine diesel engine 1 and the flue gas cooler 5 and is connected with the exhaust pipe 2; the bypass port 4 is located at the bottom of the bypass pipe 3 and is connected with the flue gas cooler 5.
It will be appreciated that in order to avoid accidents and to regulate the back pressure of the diesel engine in the device, a bypass pipe 3 is provided, through which the exhaust gases of the diesel engine are discharged to the atmosphere, and a bypass port 4 is provided at the bottom of the bypass pipe 3.
In one embodiment of the present invention, as shown in fig. 2, the decarbonizing tower 8 comprises: demister 8.5, at least one shower, at least one injection pipe, demister 8.5 is located the at least one shower, the at least one injection pipe top.
The at least one spray pipe is positioned at the upper part of the at least one spray pipe; the at least one shower includes: a first spray pipe 8.1 and a second spray pipe 8.2; the at least one injection pipe includes: a first injection pipe 8.3, a second injection pipe 8.4; the first spray pipe 8.1, the second spray pipe 8.2, the first injection pipe 8.3 and the second injection pipe 8.4 have the same distance in height.
It can be understood that the decarbonization tower 8 adopts a double combined injection device of a first spray pipe 8.1, a second spray pipe 8.2 and a first injection pipe 8.3 and a second injection pipe 8.4, wherein the injection pipes are positioned above the spray pipes.
In the spraying area, the tail gas of the marine diesel engine is in reverse contact with the NaOH solution sprayed by the first spraying pipe 8.1 and the second spraying pipe 8.2 and the NaOH solution sprayed by the first spraying pipe 8.3 and the second spraying pipe 8.4 in the falling process, so that the gas-liquid contact area is large.
In the injection area, the tail gas of the marine diesel engine is contacted with the NaOH solution which is injected by the first injection pipe 8.3 and the second injection pipe 8.4 in the ascending process in the same direction, and the purification effect of the flue gas decarburization can be ensured due to long gas-liquid contact time in the same direction.
It should be noted that before entering the first spray pipe 8.1, the second spray pipe 8.2, the first spray pipe 8.3 and the second spray pipe 8.4, the NaOH solution first enters the demister 8.5 to cool and demist the boiling mixed steam in the decarburization process, so as to reduce the volatilization of the chemical solution, and the decarburization tower 8 is further provided with a wire mesh 8.6 for re-air distribution.
In one implementation, the clear solution tank 14 stores NaOH solution.
It can be understood that the clear liquid tank 14 is used for containing a NaOH solution, the NaOH solution in the clear liquid tank is pumped to the decarbonization tower 8 and then sprayed, and the NaOH waste liquid enters the regeneration tank 9 through a return pipe after being decarbonized, reacts with CaO solid particles in the regeneration tank 9 and then enters the sedimentation tank 11, and is subjected to solid-liquid separation; and (3) putting the NaOH solution subjected to solid-liquid separation into a clear liquid pool 14, conveying the NaOH solution to the decarbonization tower 8 through a circulating pump 15, and sequentially circulating to form a closed circulating device.
In the embodiment of the invention, the NaOH solution is used as the absorbent, so that the absorption capacity is strong, and the used medicines are simple and easy to obtain, low in price and low in cost. The NaOH solution can be recycled, so that resources are saved, and energy consumption is reduced.
The invention also provides a method of absorbing solidified CO2, the method comprising:
collecting tail gas in an exhaust pipe of a marine diesel engine, and cooling;
feeding the cooled tail gas into a decarbonization tower, enabling the cooled tail gas to be in countercurrent contact with a NaOH solution sprayed in the decarbonization tower, discharging the treated tail gas from the top of the tower after multiple spraying treatments, connecting the decarbonization tower with a clear liquid tank through a circulating pump, wherein the clear liquid tank is used for containing the NaOH solution, and pumping the NaOH solution in the clear liquid tank to the decarbonization tower for spraying;
decarbonizing the NaOH waste liquid subjected to tail gas treatment, feeding the treated NaOH waste liquid into a regeneration tank through a return pipe, reacting with CaO solid particles in the regeneration tank, precipitating, and performing solid-liquid separation;
and (3) putting the NaOH solution subjected to solid-liquid separation into a clear liquid pool, and pumping the clear liquid pool to a decarbonizing tower through a circulating pump.
The invention is established based on a thermodynamic model and a material conservation law, and the decarbonization tower is designed based on a model of reaction rate. The reaction equation of the process is as follows:
2NaOH+CO2＝Na2CO3+H2O (1)
CaO+H2O＝Ca(OH)2(2)
Ca(OH)2+Na2CO3＝CaCO3↓+2NaOH (3)
the reaction process is divided into two steps, firstly NaOH solution and CO2Reaction of the gas to form Na2CO3Solution, process being CO2The absorption process of (1). When the NaOH solution fully absorbs CO2After the gas is generated, CaO solid is added, and CaO reacts with water to generate Ca (OH)2Solution, then Ca (OH) in solution2Will react with Na in the first step reaction product2CO3The reaction is carried out, and NaOH in the first-step reaction solution is regenerated at the same time, and the process is CO2Curing of (2). Thus, a cycle is formed, and the resource is saved and utilized. In addition, CaCO formed during curing3PrecipitateThe solid-liquid separation device is used for separation, and can be used for other purposes.
The NaOH solution has strong alkalinity, the absorption capacity to acid gas is stronger than that of ethanolamine and other alkyl alcohol amines, the chemical stability is good, the thermal degradation is small, the raw materials are simple and easy to obtain, and when CaO solid particles are added into the NaOH solution, the CO content of the alkali solution can be improved2The absorption rate of the composite material enables NaOH to be recycled, so that the resource consumption is reduced, and the energy consumption is reduced. Therefore, the method adopts an alkaline method to absorb the carbon dioxide in the tail gas of the marine diesel engine and has obvious advantages.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. An apparatus for absorbing CO2 from marine exhaust gas, comprising: the device comprises a marine diesel engine (1), an exhaust pipe (2), a decarbonization tower (8), a regeneration tank (9), a sedimentation tank (11), a solid-liquid separation device (12) and a circulating pump (15);
the gas outlet end of the marine diesel engine (1) is connected with one end of the exhaust pipe (2), and the other end of the exhaust pipe (2) is connected with the gas inlet end of the decarbonization tower (8);
the decarbonization tower (8) is connected with the regeneration pool (9);
the regeneration tank (9) is connected with the sedimentation tank (11);
the sedimentation tank (11) is connected with the solid-liquid separation device (12);
the solid-liquid separation device (12) comprises: a solid collecting bin (13) and a clear liquid pool (14);
the clear liquid pool (14) is connected with the decarbonization tower (8) through the circulating pump (15).
2. The device for absorbing CO2 in marine exhaust gas according to claim 1, further comprising: the device comprises a flue gas cooler (5), a blower (6), a first flue gas analyzer (7) and a second flue gas analyzer (17);
between the marine diesel engine (1) and the decarbonization tower (8), the inlet end of the flue gas cooler (5) is connected with the exhaust pipe of the marine diesel engine (1), the outlet end of the flue gas cooler (5) is connected with the inlet end of the air blower (6), and the outlet end of the air blower (6) is connected with the input end of the first flue gas analyzer (7); the flue gas cooler (5), the blower (6), the first flue gas analyzer (7) and the decarbonization tower (8) are connected through pipelines;
the first flue gas analyzer (7) is positioned on one side of an air inlet of the decarbonizing tower (8), and the second flue gas analyzer (17) is positioned on one side of an air outlet at the top of the decarbonizing tower (8).
3. The device for absorbing CO2 in marine exhaust gas according to claim 1, further comprising: a first dosing funnel (10) and a second dosing funnel (16);
the first dosing funnel (10) is arranged at the upper part of the regeneration tank (9);
the second medicine adding funnel (16) is arranged at the upper part of the clear liquid pool (14).
4. The device for absorbing CO2 in marine exhaust gas according to claim 2, further comprising: a bypass pipe (3) and a bypass port (4);
the bypass pipe (3) is arranged between the marine diesel engine (1) and the flue gas cooler (5) and is connected with the exhaust pipe (2);
the bypass port (4) is positioned at the bottom of the bypass pipe (3) and is connected with the flue gas cooler (5).
5. The apparatus for absorbing CO2 in marine exhaust gas according to claim 1, wherein the decarbonization tower (8) comprises: demister (8.5), at least one shower, at least one injection pipe, defroster (8.5) are located the top of at least one shower, the at least one injection pipe.
6. The device for absorbing CO2 in marine exhaust gas according to claim 5, wherein the at least one spray pipe is located at an upper part of the at least one spray pipe;
wherein the at least one shower comprises: a first spray pipe (8.1), a second spray pipe (8.2);
the at least one injection pipe includes: a first injection pipe (8.3), a second injection pipe (8.4);
the first spray pipe (8.1), the second spray pipe (8.2), the first spray pipe (8.3) and the second spray pipe (8.4) have the same distance in height.
7. The device for absorbing CO2 in ship tail gas according to claim 1, wherein a NaOH solution is stored in the clear liquid tank (14).
8. A method of absorbing solidified CO2, the method comprising:
collecting tail gas in an exhaust pipe of a marine diesel engine, and cooling;
feeding the cooled tail gas into a decarbonization tower, enabling the cooled tail gas to be in countercurrent contact with a NaOH solution sprayed in the decarbonization tower, discharging the treated tail gas from the top of the tower after multiple spraying treatments, connecting the decarbonization tower with a clear liquid tank through a circulating pump, wherein the clear liquid tank is used for containing the NaOH solution, and pumping the NaOH solution in the clear liquid tank to the decarbonization tower for spraying;
decarbonizing the NaOH waste liquid subjected to tail gas treatment, feeding the treated NaOH waste liquid into a regeneration tank through a return pipe, reacting with CaO solid particles in the regeneration tank, precipitating, and performing solid-liquid separation;
and (4) putting the NaOH solution subjected to solid-liquid separation into a clear liquid pool, and pumping to a decarbonizing tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910217968.2A CN111715059A (en) | 2019-03-21 | 2019-03-21 | Device for absorbing CO2 in ship tail gas and method for absorbing and solidifying CO2 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910217968.2A CN111715059A (en) | 2019-03-21 | 2019-03-21 | Device for absorbing CO2 in ship tail gas and method for absorbing and solidifying CO2 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090006934A (en) * | 2007-07-13 | 2009-01-16 | 한국전기연구원 | Co2 solidifying method |
| CN107349759A (en) * | 2017-07-19 | 2017-11-17 | 哈尔滨工程大学 | A kind of ship tail gas combined desulfurization carbonization treatment device |
| CN107961658A (en) * | 2017-12-02 | 2018-04-27 | 李雪琴 | A kind of device and method for carrying out desulfurization and decarburization to flue gas using carbide slag |
-
2019
- 2019-03-21 CN CN201910217968.2A patent/CN111715059A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090006934A (en) * | 2007-07-13 | 2009-01-16 | 한국전기연구원 | Co2 solidifying method |
| CN107349759A (en) * | 2017-07-19 | 2017-11-17 | 哈尔滨工程大学 | A kind of ship tail gas combined desulfurization carbonization treatment device |
| CN107961658A (en) * | 2017-12-02 | 2018-04-27 | 李雪琴 | A kind of device and method for carrying out desulfurization and decarburization to flue gas using carbide slag |
Non-Patent Citations (2)
| Title |
|---|
| 王忠诚等: "NaOH溶液吸收CO2的试验研究", 《安全与环境学报》, vol. 15, no. 4, pages 293 - 296 * |
| 王忠诚等: "基于碱法机理减少船舶CO2排放研究", 《北京理工大学学报》, vol. 38, no. 3, 31 March 2018 (2018-03-31), pages 241 - 246 * |
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