CN108704466A - A kind of ammonia process ship tail gas denitration integrated device and method - Google Patents
A kind of ammonia process ship tail gas denitration integrated device and method Download PDFInfo
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- CN108704466A CN108704466A CN201810519107.5A CN201810519107A CN108704466A CN 108704466 A CN108704466 A CN 108704466A CN 201810519107 A CN201810519107 A CN 201810519107A CN 108704466 A CN108704466 A CN 108704466A
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- waste water
- flue gas
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 16
- 239000002351 wastewater Substances 0.000 claims abstract description 117
- 239000003546 flue gas Substances 0.000 claims abstract description 68
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 claims abstract description 54
- 238000005201 scrubbing Methods 0.000 claims abstract description 36
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005406 washing Methods 0.000 claims abstract description 21
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 18
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 15
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 55
- 239000004202 carbamide Substances 0.000 claims description 55
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 40
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 40
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 36
- 239000007921 spray Substances 0.000 claims description 33
- 238000000197 pyrolysis Methods 0.000 claims description 29
- 239000000843 powder Substances 0.000 claims description 28
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 27
- 238000006477 desulfuration reaction Methods 0.000 claims description 24
- 230000023556 desulfurization Effects 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 9
- 150000003863 ammonium salts Chemical class 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 238000004065 wastewater treatment Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000006385 ozonation reaction Methods 0.000 claims description 3
- 210000002700 urine Anatomy 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005200 wet scrubbing Methods 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- -1 Hydrogen salt Chemical class 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 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
- B01D53/74—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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
A kind of ammonia process ship tail gas denitration integrated device of present invention offer and method, including gas cooler, scrubbing tower, NO oxidators, further include treatment unit for waste water and waste water neutralization reaction unit；Boat diesel engine is connected to flue gas triple valve, flue gas triple valve is communicates directly to air all the way, another way is communicated to gas cooler, gas cooler is communicated to the bottom of scrubbing tower by washing tower flue gas shut-off valve, NO oxidators are connected with the top of scrubbing tower, flue gas check valve is connected to NO oxidators and treatment unit for waste water, treatment unit for waste water are connected with waste water neutralization reaction unit；Ship denitration integrated device and method SO proposed by the present invention2Simple, non-secondary pollution is formed with the efficient of NO, good economy performance, system, nitrate is free of in treated washings, fully meets the relevant control standard of IMO discharge of wastewater.
Description
Technical field
The present invention relates to a kind of tail gas desulfurization method of denitration and device more particularly to a kind of ammonia process ship tail gas desulphurization denitrations
Integral method and device belong to diesel engine vent gas purification techniques field.
Background technology
With the increase of volume of world trade, contact car loading increases severely between various countries, and sea-freight carries in the world 90% or more
Cargo transport.Diesel engine is widely used as the power plant of ship due to its good performance, and boat diesel engine exists
It will produce a large amount of NO and SO during work2, these pernicious gases can constitute health and natural environment prodigious
It threatens.International Maritime Organization IMO has stringent limitation standard, lot of domestic and foreign scientific research institution all the time for ship discharge
It is dedicated to the correlative study of ship tail gas processing.
Currently, ship tail gas desulfurization technology mainly has seawer washing and alkaline process washing technology, ship tail gas denitration technology master
Want selective catalytic reduction technique SCR and EGR Technology EGR.The desulfurization technology and denitration technology of mainstream, which exist, takes up an area
The shortcomings of area is big, initial cost is of high cost, operation maintenance management difficulty is big, energy consumption is high.Therefore, desulfurization and denitrification integral technology at
For the hot subject of research, many researchers propose the technology path of desulfurization and denitrification integral, but all exist apparent
Defect.
Application No. is 201010540886.0 patents《The desulfurization denitration method and processing unit of marine exhaust》Middle profit
The integration removing of ship tail gas is realized with the method for ozone and hydrogen peroxide.The generation of the invention ozone can expend a large amount of electricity
It can so that the economy of whole system is deteriorated；Hydrogen peroxide is a kind of strong oxidizer, has very strong corrosivity, storage
Difficulty is larger, while bringing very big threat to the production safety of crewman；And there are three reactive tank, flue gases for the reactor of the device
Larger pressure drop is had in the reactor, can seriously affect the working performance of diesel engine.
Application No. is 201010174281.4 patents《A kind of side for synchronous desulfurization and denitrification of marine vessel exhaust
Method》In, using the method for ozone and seawer washing by the NO and SO in flue gas2It is converted into nitric acid and sulfuric acid, final row sea.The hair
In bright, the flue gas that diesel engine generates eventually enters into scrubbing tower by multiple 90 ° of corners, can greatly increase the back pressure of diesel engine,
The working performance of diesel engine is influenced, the final product of the desulfurization and denitrification integral method is nitric acid and sulfuric acid, the associated emissions of IMO
Regulation does not allow acidic materials directly to enter sea, thus this method there is a problem of in practical applications it is larger.
Application No. is 201410756640.5 patents《A kind of marine internal combustion engine tail gas desulfurization method of denitration》In, it utilizes
Two scrubbing towers realize the desulphurization denitration of ship flue gas, can bring larger energy consumption comprising two scrubbing towers in the invention, simultaneously
Two scrubbing towers can occupy a large amount of ship useful space.In denitration scrubbing tower, a part of NO2Meeting and H2O reactions generate HNO3
And NO, it can make to contain a large amount of NO in tail gas, while there are nitrate in washings, bring secondary pollution；And phenylenediamine is one
The toxic chemical substance of kind, can seriously threaten the health of crewman.
In conclusion existing ship desulfurization and denitrification integral technology has problems in practical applications, compel to be essential
Develop desulfurization and denitrification integral technology that is efficient, economic, disclosure satisfy that relevant emission standards.
Invention content
The purpose of the invention is to provide a kind of ammonia process ship that is efficient, economic, disclosure satisfy that relevant emission standards
Tail gas desulfurization denitrification integrated device.The present invention also provides a kind of ammonia process ship tail gas desulfurization and denitrification integral methods.
The object of the present invention is achieved like this：
A kind of ammonia process ship tail gas denitration integrated device, including gas cooler 3, scrubbing tower 9, NO oxidators
12, further include treatment unit for waste water 29 and waste water neutralization reaction unit 35；
Boat diesel engine 1 is connected to flue gas triple valve 2, and flue gas triple valve 2 is communicates directly to air all the way, and another way connects
Gas cooler 3 is led to, gas cooler 3 is communicated to the bottom of scrubbing tower 9, NO oxidators by washing tower flue gas shut-off valve 10
12 are connected with the top of scrubbing tower 9, and flue gas check valve 20 is connected to NO oxidators 12 and treatment unit for waste water 29, treatment unit for waste water
29 are connected with waste water neutralization reaction unit 35；
The gas cooler 3 and sequentially connected coolant outlet flowmeter 6, coolant three-way magnetic valve 7, cooling
Device 5, coolant entrance flowmeter 4 constitute circuit；
The scrubbing tower 9 includes that upper layer and lower layer sprays spray system：Lower layer's spray system sprays ammonia solution, upper layer spray
The acid wash water that system spent shower water processing unit 29 generates；
Urea liquid holding vessel 17 is connected with urea liquid supply pump 19, and urea liquid supply pump 19 passes through urea liquid list
It is connected to valve 18 with urea liquid pyrolysis generator 25, urea liquid pyrolysis generator 25 is connected with ammonia solution buffer tank 22, ammonia
Solution buffer tank 22 sprays supply pump 23 by ammonia solution and is connected with lower layer spray system；
Urea pyrolysis temperature control unit 15 acquires the temperature signal of urea pyrolysis temperature sensor 16, to adjust cooling
The origin of heat being pyrolyzed in the bypass aperture of agent three-way magnetic valve 7, wherein urea liquid pyrolysis generator 25 is in cooled flue gas
The heat of cooler 5；Ammonia solution injection control unit 14 acquires smoke inlet SO2The signal of concentration sensor 11, to control
The aperture of ammonia solution flow control electromagnetic valve 21；
The top of the treatment unit for waste water 29 installs control solenoid valve 27 and ferroalloy powder additional by ferroalloy powder
Holding vessel 26 is connected, and bottom is connected with dregs storage cabinet 30, and the wastewater outlet of the treatment unit for waste water 29 is equipped with filter
28, waste water neutralization reaction unit 35 is connected by filter 28 with waste water neutralization reaction unit 35, waste water neutralization reaction unit 35 with
Waste water quality monitoring device 37 is connected；Ferroalloy powder installs the letter that control unit 31 acquires nitrate ion concentration sensor 32 additional
Number, to control the aperture that ferroalloy powder installs control solenoid valve 27 additional；In waste water and control unit 34 acquires wastewater pH sensing
The signal of device 36, to control in waste water and control the aperture of solenoid valve 33.
A kind of ammonia process ship tail gas desulfurization and denitrification integral method, includes the following steps：
A. the flue gas that boat diesel engine 1 is discharged passes through flue gas triple valve 2 and gas cooler 3；
B. enter from the low-temperature flue gas that gas cooler 3 is discharged from the bottom of scrubbing tower 9, by lower layer's spray system by cigarette
SO in gas2It is converted into (NH4)2SO3And NH4HSO3, later flue gas uplink remove the ammonia of volatilization by upper layer spray system,
Scrubbing tower 9 is discharged by demister 13 and exhaust air-introduced machine 8 in flue gas；
C. the flue gas of discharge scrubbing tower 9 enters NO oxidators 12, and the NO in flue gas is oxidized to NO2；Flue gas from bottom into
Enter treatment unit for waste water 29, NO therein2With (the NH in cleaning solution4)2SO3And NH4HSO3Reaction generates N2、(NH4)2SO4With it is few
The nitrate of amount, a small amount of nitrate in treatment unit for waste water 29 are handled with ferroalloy powder, and nitrate is changed into ammonium salt, when
The waste water being discharged in treatment unit for waste water 29 meets discharge standard, then waste water is discharged into sea, and otherwise waste water is recycled locates again
Reason；
D. urea liquid is stored in urea liquid holding vessel 17, and urea liquid supply pump 19 lighters urea liquid to urine
In plain solution pyrolysis generator 25, urea pyrolysis temperature control unit 15 acquires the temperature letter of urea pyrolysis temperature sensor 16
Number, to adjust the bypass aperture of coolant three-way magnetic valve 7, and then realize the heating process of urea pyrolysis；
It is stored in the ammonia solution generated in urea liquid pyrolysis generator 25 to be lightered into ammonia solution buffer tank 22, later
Lower layer's spray system is delivered to by ammonia solution spray supply pump 23, ammonia solution injection control unit 14 acquires smoke inlet SO2It is dense
The signal of degree sensor 11 realizes the desulfurization of flue gas to control the aperture of ammonia solution flow control electromagnetic valve 21；
In treatment unit for waste water 29, ferroalloy powder installs control unit 31 additional and acquires nitrate ion concentration sensor 32
Signal, to control ferroalloy powder install additional control solenoid valve 27 aperture, realize the appropriate addition of ferroalloy powder；
Filter 28 is installed in the wastewater outlet for the treatment of unit for waste water, the dregs of filtering are collected into dregs storage cabinet 30,
The waste water for the treatment of unit for waste water discharge enters in waste water neutralization reaction unit 35, acquires wastewater pH with control unit 34 in waste water and passes
The signal of sensor controls the pH of waste water between 7.0~8.0 to control in waste water and the aperture of control solenoid valve 33, from useless
In water and the waste water of the discharge of control unit 34 passes through waste water quality monitoring device 37, if water quality is qualified, waste water row sea, if water quality
Unqualified, then waste water is discharged triple valve 38 by waste water and is circulated to continuing with for treatment unit for waste water.
The invention also includes some such structure features：
1.NO method for oxidation is Ozonation, plasma method or catalytic oxidation.
2. the coolant in gas cooler is oil or water.
Compared with prior art, the beneficial effects of the invention are as follows：
The desulfurization and denitrification integral technology of 1 present invention only has a scrubbing tower, and relevant mating dynamic power machine is less, can
The use of the ship useful space is largely reduced, while energy consumption, good economy performance can be greatly reduced；
Cleaning solution in 2 present invention is ammonia solution, and ammonia solution is generated by urea pyrolysis, and urea liquid price is closed
Reason, while the storage of urea liquid aboard ship is more convenient；
3 present invention realization desulfurization and denitrification integrals using scrubbing tower in the form of, contact area between gas phase and liquid phase compared with
Greatly, reaction efficiency is high；
The heat that urea pyrolysis origin of heat is cooled down in flue gas in 4 present invention realizes efficiently using for waste heat, greatly
Energy consumption is reduced, while reducing the equipment of urea pyrolysis heating, keeps system composition simpler；
5 present invention increase by one layer except ammonia sprays, realize excess ammonia to prevent the Ammonia valatilization in ammonium hydroxide from forming the escaping of ammonia
Collection, not will produce secondary pollution during tail gas clean-up；
It uses cheap ferroalloy powder as addition drug in 6 treatment unit for waste water of the present invention, realizes waste water
The removing of middle nitrate ion makes the waste water of generation comply fully with the control standard of IMO；
The desulfurization and denitrification integral technology of 7 present invention can remove NO and SO in diesel engine vent gas completely2, generated
Nitrate is free of in washings, the pH of waste discharge disclosure satisfy that requirement standards of the IMO for sewage by regulation and control；
8 inventions can change the floor space for the system of greatly reducing, and the cost for consuming object is substantially reduced.The present invention uses wet method
Washing removing sulfuldioxide can effectively improve removal efficiency, and system composition is relatively simple, while reducing the energy consumption of system and being
The complexity that system is safeguarded.
Description of the drawings
Fig. 1 is：The schematic diagram of the ammonia process ship tail gas denitration integrated device and method of the present invention.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings.
In conjunction with Fig. 1, wherein 1 being boat diesel engine, 2 being flue gas triple valve, 3 be gas cooler, 4 being coolant entrance stream
Gauge, 5 be cooler, 6 be coolant outlet flowmeter, 7 be coolant three-way magnetic valve, 8 be exhaust air-introduced machine, 9 be washing
Tower, 10 be washing tower flue gas shut-off valve, 11 be smoke inlet SO2Concentration sensor, 12 be NO oxidators, 13 be demister,
14 it is ammonia solution injection control unit, 15 be urea pyrolysis temperature control unit, 16 be urea pyrolysis temperature sensor, 17 is urine
Plain solution storage tanks, 18 be urea liquid check valve, 19 be urea liquid supply pump, 20 be flue gas check valve, 21 be ammonia solution
Flow control electromagnetic valve, 22 be ammonia solution buffer tank, 23 be ammonia solution spray supply pump, 24 be washes transportation by lighter pump, 25 be
Urea liquid pyrolysis generator, 26 be ferroalloy powder holding vessel, 27 be ferroalloy powder install additional control solenoid valve, 28 be filter
Device, 29 be treatment unit for waste water, 30 be dregs storage cabinet, 31 be that ferroalloy powder installs control unit additional, 32 is nitrate ion
Concentration sensor, 33 be in waste water and control solenoid valve, 34 be in waste water and control unit, 35 be waste water neutralization reaction unit,
36 be wastewater pH sensor, 37 be waste water quality monitoring device, 38 be waste water discharge triple valve.
The present invention proposes that a kind of the ship denitration integrated device and method of wet scrubbing, cleaning solution of the invention are
Ammonia solution, ammonia solution are prepared by urea liquid.In scrubbing tower, the SO in flue gas2It is absorbed by ammonia solution, react life
At NH42SO3And NH4HSO3, scrubbing tower discharge flue gas in NO be oxidized to NO in NO oxidation units2.In wastewater treatment list
In member, NO2With the NH in cleaning solution42SO3And NH4HSO3Effect generates nitrate and nitrogen.So far, in diesel engine vent gas
SO2It is changed into sulfate, the NO in tail gas is changed into nitrate and nitrogen.To avoid seawater eutrophication, meet IMO to washing
Nitrate reduction in waste water with ferroalloy powder is ammonium salt in treatment unit for waste water, realized green by the requirement of discharge of wastewater
Color discharges.
Desulfurization and denitrification integral technology specific implementation step provided by the invention is as follows：
The exhaust gas of 1 boat diesel engine discharge passes through flue gas triple valve and gas cooler.
2 low temperature waste gas being discharged from gas cooler enter reaction tower from the bottom of reaction tower, under in reaction tower
Layer ammonia spray system is by the SO in flue gas2It is converted into NH42SO3And NH4HSO3, flue gas uplink, which is passed through, later removes ammonia spray system, will
The ammonia removal of lower layer's spray system volatilization, prevents the escaping of ammonia.Scrubbing tower is discharged by demister and exhaust air-introduced machine in flue gas.
The exhaust gas of 3 discharge reaction towers enters NO oxidators, and in NO oxidators, the NO in flue gas is oxidized to NO2.Flue gas
Enter waste water treatment reaction unit from the bottom of waste water treatment reaction unit, in waste water treatment reaction unit, flue gas
In NO2With the NH in cleaning solution42SO3And NH4HSO3Reaction generates N2、NH42SO4With a small amount of nitrate, treatment unit for waste water
In a small amount of nitrate handled with ferroalloy powder, nitrate is changed into ammonium salt, when be discharged in water treatment unit waste water symbol
The discharge standard of IMO is closed, then waste water is discharged into sea, if water quality does not meet discharge standard, is recycled and is handled again.
Ammonia solution in 4 systems is that aqueous solution of urea is produced by way of pyrolysis, wherein the origin of heat being pyrolyzed in
The heat of the coolant of cooled flue gas, this mode can greatly save energy consumption.
It is as follows the present invention relates to that must chemically react：
1 scrubbing tower：
SO2+2NH3·H2O→NH42SO3+H2O
SO2+NH3·H2O→NH4HSO3
2 water treatment unit：
4NO2+H2O+3NH42SO3→N2↑+3NH42SO4+2HNO3
4NO2+H2O+3NH4HSO3→N2↑+3NH4HSO4+2HNO3
NO3 -+10H++8e-→NH4 ++3H2O
Fe→Fe2++2e-
NO3 -+10H++4Fe→NH4 ++3H2O+4Fe2+
Integration removing sulfuldioxide proposed by the present invention is described in detail：The present invention is the ship tail gas one based on ammonia process
Change removing sulfuldioxide.The exhaust gas that boat diesel engine 1 generates passes through flue gas triple valve 2, and flue gas enters in gas cooler 3, low temperature cigarette
Gas enters scrubbing tower 9 from the bottom of scrubbing tower later by washing tower flue gas shut-off valve 10, in scrubbing tower, the SO in flue gas2
The ammonia solution washed with lower layer reacts, and the element sulphur in flue gas is converted into sulphite and bisulfites, contains a small amount of ammonia
Flue gas continue uplink in scrubbing tower, ammonia is reacted with the acid wash water that upper layer is washed, and ammonia is converted into ammonium salt.By washing
Scrubbing tower is discharged by demister 13 and exhaust air-introduced machine 8 in the flue gas washed, and in NO oxidators 12, the NO in flue gas is oxidized to
NO2, later flue gas enter in treatment unit for waste water 29, the NO in flue gas2It is anti-with washings sulfite salt and bisulfites
It answers, the nitrogen in flue gas is converted into nitrogen and nitric acid, and treated flue gas is discharged into air from the top for the treatment of unit for waste water 29.
Urea liquid is stored in urea liquid holding vessel 17, and urea liquid supply pump 19 lighters urea liquid to urea
Solution is pyrolyzed in generator 25, and urea pyrolysis temperature control unit 15 acquires the temperature signal of urea pyrolysis temperature sensor 16,
To adjust the bypass aperture of coolant three-way magnetic valve 7, and then realize the heating process of urea pyrolysis.It is stored in urea liquid
The ammonia solution generated in pyrolysis generator 25 is lightered into ammonia solution buffer tank 22, defeated by ammonia solution spray supply pump 23 later
It send to lower layer's spray system, ammonia solution injection control unit 14 acquires smoke inlet SO2The signal of concentration sensor 11, to control
The aperture of ammonia solution flow control electromagnetic valve 21 processed, realizes the desulfurization of flue gas.
In treatment unit for waste water 29, ferroalloy powder installs control unit 31 additional and acquires nitrate ion concentration sensor 32
Signal, to control ferroalloy powder install additional control solenoid valve 27 aperture, realize the appropriate addition of ferroalloy powder.Useless
The wastewater outlet of water treatment unit installs filter 28, and the dregs of filtering are collected into dregs storage cabinet 30, treatment unit for waste water
The waste water of discharge enters in waste water neutralization reaction unit 35, and in waste water and control unit 34 acquires the signal of wastewater pH sensor,
To control in waste water and control the aperture of solenoid valve 33, the pH of waste water is controlled between 7.0~8.0, from waste water and is controlled
The waste water of unit discharge passes through waste water quality monitoring device 37, if water quality is qualified, waste water row sea；If water quality is unqualified, give up
Water is discharged triple valve 38 by waste water and is circulated to continuing with for treatment unit for waste water.
Ferroalloy powder mentioned in this article should be construed broadly as using iron as reactive agent metal powder, herein
The NO method for oxidation being related to, which should include that Ozonation, plasma method, catalytic oxidation etc. are all, to be oxidized to NO by NO2's
Technological means, the coolant that the present invention mentions in gas cooler include the liquid medium of all cooling effects such as oil, water.
The scrubbing tower being mentioned herein should be construed broadly to include packed tower, spray column etc. it is all utilize wet scrubbing
Removing pollutant tower.
Although having been combined embodiment herein, invention has been described, it is understood that, the present invention not office
Be limited to disclosed embodiment, but in the various combinations for equally covering its feature as defined in the appended claims or
Modification is already contained in some other applications in the scope of the present invention.
To sum up：The invention discloses a kind of boat diesel engine denitration integrated device and method based on ammonia process.It should
Covering device includes mainly flue gas cooling, flue gas washing, NO is aoxidized, ammonia solution is produced, the flows such as wastewater treatment.It is sharp in scrubbing tower
With ammonia solution spray washing by the SO in flue gas2Removing, in treatment unit for waste water, NO2With the sulfate and sulfuric acid in washings
Hydrogen salt reacts, to realize denitrating flue gas.Two layers of spray is arranged in the scrubbing tower of the present invention, and lower layer sprays for washing desulphurization, upper layer
The escaping of ammonia is prevented by spraying acid wash water.In treatment unit for waste water, by ferroalloy powder in acidic environment with nitre
Acid ion reacts, and converts the nitrate ion in waste water to ammonium salt.Ship desulfurization and denitrification integral dress proposed by the present invention
It sets and method SO2With the efficient of NO, good economy performance, system composition be simple, non-secondary pollution, in treated washings not
Containing nitrate, fully meet the relevant control standard of IMO discharge of wastewater.
Claims (4)
1. a kind of ammonia process ship tail gas denitration integrated device, including gas cooler (3), scrubbing tower (9), NO oxidators
(12), characterized in that further include treatment unit for waste water (29) and waste water neutralization reaction unit (35)；
Boat diesel engine (1) is connected to flue gas triple valve (2), and flue gas triple valve (2) is communicates directly to air, another way all the way
It is communicated to gas cooler (3), gas cooler (3) is communicated to the bottom of scrubbing tower (9) by washing tower flue gas shut-off valve (10)
Portion, NO oxidators (12) are connected with the top of scrubbing tower (9), and flue gas check valve (20) is connected to NO oxidators (12) and wastewater treatment
Unit (29), treatment unit for waste water (29) are connected with waste water neutralization reaction unit (35)；
It is the gas cooler (3) and sequentially connected coolant outlet flowmeter (6), coolant three-way magnetic valve (7), cold
But device (5), coolant entrance flowmeter (4) constitute circuit；
The scrubbing tower (9) includes upper layer and lower layer spray spray system：Lower layer's spray system sprays ammonia solution, upper layer spray system
The acid wash water that spent shower water processing unit (29) of uniting generates；
Urea liquid holding vessel (17) is connected with urea liquid supply pump (19), and urea liquid supply pump (19) passes through urea liquid
Check valve (18) is connected with urea liquid pyrolysis generator (25), and urea liquid is pyrolyzed generator (25) and ammonia solution buffer tank
(22) it is connected, ammonia solution buffer tank (22) sprays supply pump (23) by ammonia solution and is connected with lower layer spray system；Urea pyrolysis
Temperature control unit (15) acquires the temperature signal of urea pyrolysis temperature sensor (16), to adjust coolant three-way magnetic valve
(7) bypass aperture, wherein urea liquid are pyrolyzed the origin of heat being pyrolyzed in generator (25) in the cooler (5) of cooled flue gas
Heat；Ammonia solution injection control unit (14) acquires smoke inlet SO2The signal of concentration sensor (11), it is molten to control ammonia
Flow quantity controls the aperture of solenoid valve (21)；
The top of the treatment unit for waste water (29) installs control solenoid valve (27) and ferroalloy powder additional by ferroalloy powder
Holding vessel (26) is connected, and bottom is connected with dregs storage cabinet (30), the wastewater outlet installation of the treatment unit for waste water (29)
There is filter (28), waste water neutralization reaction unit (35) is connected by filter (28) with waste water neutralization reaction unit (35), in waste water
It is connected with reaction member (35) with waste water quality monitoring device (37)；Ferroalloy powder installs control unit (31) additional and acquires nitrate anion
The signal of ion concentration sensor (32), to control the aperture that ferroalloy powder installs control solenoid valve (27) additional；Waste water neutralizes
Control unit (34) acquires the signal of wastewater pH sensor (36), to control in waste water and control the aperture of solenoid valve (33).
2. a kind of ammonia process ship tail gas desulfurization and denitrification integral method, characterized in that include the following steps：
A. the flue gas of boat diesel engine (1) discharge passes through flue gas triple valve (2) and gas cooler (3)；
B. enter from the low-temperature flue gas that gas cooler (3) is discharged from the bottom of scrubbing tower (9), by lower layer's spray system by cigarette
SO in gas2It is converted into (NH4)2SO3And NH4HSO3, later flue gas uplink remove the ammonia of volatilization by upper layer spray system,
Scrubbing tower (9) is discharged by demister (13) and exhaust air-introduced machine (8) in flue gas；
C. the flue gas of discharge scrubbing tower (9) enters NO oxidators (12), and the NO in flue gas is oxidized to NO2；Flue gas enters from bottom
Treatment unit for waste water (29), NO therein2With (the NH in cleaning solution4)2SO3And NH4HSO3Reaction generates N2、(NH4)2SO4With it is few
The nitrate of amount, a small amount of nitrate in treatment unit for waste water (29) are handled with ferroalloy powder, and nitrate is changed into ammonium salt,
When the waste water being discharged in treatment unit for waste water (29) meets discharge standard, then waste water is discharged into sea, and otherwise waste water is recycled again
Secondary processing；
D. urea liquid is stored in urea liquid holding vessel (17), and urea liquid supply pump (19) lighters urea liquid to urine
In plain solution pyrolysis generator (25), urea pyrolysis temperature control unit (15) acquires the temperature of urea pyrolysis temperature sensor (16)
Signal is spent, to adjust the bypass aperture of coolant three-way magnetic valve (7), and then realizes the heating process of urea pyrolysis；
It is stored in the ammonia solution generated in urea liquid pyrolysis generator (25) to be lightered into ammonia solution buffer tank (22), later
Lower layer's spray system is delivered to by ammonia solution spray supply pump (23), ammonia solution injection control unit (14) acquires smoke inlet
SO2The signal of concentration sensor (11) realizes the de- of flue gas to control the aperture of ammonia solution flow control electromagnetic valve (21)
Sulphur；
In treatment unit for waste water (29), ferroalloy powder installs control unit (31) additional and acquires nitrate ion concentration sensor
(32) signal realizes that the appropriate of ferroalloy powder adds to control the aperture that ferroalloy powder installs control solenoid valve (27) additional
Add；
In the wastewater outlet installation filter (28) for the treatment of unit for waste water, the dregs of filtering are collected into dregs storage cabinet (30),
The waste water for the treatment of unit for waste water discharge enters in waste water neutralization reaction unit (35), and in waste water and control unit (34) acquires waste water
The signal of pH sensors, to control in waste water and the aperture of control solenoid valve (33), control the pH of waste water 7.0~8.0 it
Between, from waste water and the waste water of control unit (34) discharge passes through waste water quality monitoring device (37), if water quality is qualified, waste water
Row sea, if water quality is unqualified, waste water is discharged triple valve (38) by waste water and is circulated to continuing with for treatment unit for waste water.
3. a kind of ammonia process ship tail gas desulfurization and denitrification integral method according to claim 2, characterized in that the NO
It is oxidized to NO2Method be Ozonation, plasma method or catalytic oxidation.
4. a kind of ammonia process ship tail gas desulfurization and denitrification integral method according to claim 2 or 3, characterized in that described
Coolant in the cooler (5) of flue gas is oil or water.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145261A (en) * | 2020-08-05 | 2020-12-29 | 中船澄西船舶修造有限公司 | Marine low-temperature self-cleaning urea cabin |
| CN112985943A (en) * | 2021-02-25 | 2021-06-18 | 交通运输部天津水运工程科学研究所 | Based on boats and ships tail gas plume SO2Monitored pretreatment device |
| CN116255230A (en) * | 2023-05-15 | 2023-06-13 | 烟台龙源电力技术股份有限公司 | Pure ammonia engine waste gas treatment system and method based on microwave catalytic reduction |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381699A (en) * | 2015-11-17 | 2016-03-09 | 东南大学 | Hydrogen peroxide oxidation combined amino wet desulphurization and denitration method and device |
-
2018
- 2018-05-28 CN CN201810519107.5A patent/CN108704466A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381699A (en) * | 2015-11-17 | 2016-03-09 | 东南大学 | Hydrogen peroxide oxidation combined amino wet desulphurization and denitration method and device |
Non-Patent Citations (2)
| Title |
|---|
| 朱菲菲: "尿素水解制氨用于湿式氨法烟气脱硫研究", 《中国优秀硕士学位论文全文数据库》 * |
| 陈维杰等著: "《水致疾病风险与饮水安全技术》", 31 December 2009, 黄河水利出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145261A (en) * | 2020-08-05 | 2020-12-29 | 中船澄西船舶修造有限公司 | Marine low-temperature self-cleaning urea cabin |
| CN112985943A (en) * | 2021-02-25 | 2021-06-18 | 交通运输部天津水运工程科学研究所 | Based on boats and ships tail gas plume SO2Monitored pretreatment device |
| CN112985943B (en) * | 2021-02-25 | 2022-09-09 | 交通运输部天津水运工程科学研究所 | Based on boats and ships tail gas plume SO 2 Monitored pretreatment device |
| CN116255230A (en) * | 2023-05-15 | 2023-06-13 | 烟台龙源电力技术股份有限公司 | Pure ammonia engine waste gas treatment system and method based on microwave catalytic reduction |
| CN116255230B (en) * | 2023-05-15 | 2023-07-11 | 烟台龙源电力技术股份有限公司 | Pure ammonia engine waste gas treatment system and method based on microwave catalytic reduction |
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