CN105944567A - Ship exhaust gas denitration system - Google Patents
Ship exhaust gas denitration system Download PDFInfo
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- CN105944567A CN105944567A CN201610474217.5A CN201610474217A CN105944567A CN 105944567 A CN105944567 A CN 105944567A CN 201610474217 A CN201610474217 A CN 201610474217A CN 105944567 A CN105944567 A CN 105944567A
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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
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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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
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- 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)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
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- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a ship exhaust gas denitration system. The ship exhaust gas denitration system comprises an exhaust gas denitration pipeline, an exhaust gas bypass pipeline, a denitration reactor, a heating pipeline and a heating bypass pipeline, wherein the exhaust gas denitration pipeline is connected with an exhausting end of a diesel engine through a first valve; the exhaust gas bypass pipeline is connected with the exhausting end of the diesel engine through a second valve; the denitration reactor is connected into the exhaust gas denitration pipeline; the heating pipeline is connected with an incinerator through a third valve; the heating bypass pipeline is connected with the incinerator through a fourth valve; when the first valve and the third valve are opened and the second valve and the fourth valve are closed, exhaust gas of the incinerator and exhaust gas of the diesel engine are mixed in the exhaust gas denitration pipeline and the temperature of the exhaust gas is adjusted; then the exhaust gas enters the denitration reactor to be denitrated; when the first valve and the third valve are closed and the second valve and the fourth valve are opened, the exhaust gas of the incinerator and the exhaust gas of the diesel engine are exhausted by the heating bypass pipeline and the exhaust gas bypass pipeline respectively. The heating pipeline is connected with the incinerator and the exhaust gas denitration pipeline and heating and temperature regulation are carried out by utilizing temperature difference of the exhaust gas of the incinerator and the exhaust gas of the diesel engine, so that the temperature of the mixed exhaust gas meets reaction requirements of the reactors.
Description
Technical field
The present invention relates to atmospheric environment protection field, especially with regard to a kind of marine exhaust denitration system
System.
Background technology
" MARPOL 73/78 pact " supplemental provisions VI passed through according to International Maritime Organization (IMO)
In the requirement of amendment of " prevent boats and ships from causing air pollution rule ", the nitrogen oxygen in marine exhaust
Compound have to pass through process up to standard after could discharge.For low-speed marine diesel engine (rotating speed n < 130
Rpm), the amount of nitrogen oxides after process is less than 3.4g/kwh, and for current low speed diesel oil
Machine, only by Optimization of Diesel Engine combustion system, it is impossible to reach this emission request.Therefore, marine diesel
Machine must be equipped with marine exhaust denitrating system, and SCR technology (Selective
Catalytic Reduction, SCR) it is a kind of Diesel Engine After-treatment Technology that current application is the strongest,
This technology is at 290 DEG C～420 DEG C, utilize reducing agent optionally with NOXEnter on a catalyst
Row reduction reaction, generates the N of nontoxic pollution-free2And H2O.At present, marine exhaust denitrating system is only
Have and just can run when entering emission control region (Emission Control Area, ECA region),
Boats and ships are when non-ECA area operation, and denitrating system is in stopped status.
For being applied to the SCR system of high-power marine low-speed diesel engine, there are two kinds of installation sides
Formula: before being arranged on turbocharger and after being arranged on turbocharger.Be arranged on turbocharger it
After SCR system relatively small for the impact of diesel engine body, be therefore widely used in various ship
Oceangoing ship.For being arranged on the SCR system after turbocharger, owing to marine exhaust is through whirlpool
Wheel supercharging after temperature step-down (about 230 DEG C), especially diesel engine at underload time, it is impossible to
Fully meet the reaction temperature needed for SCR, it is therefore desirable to waste gas is heated, the most generally adopt
Mode of heating be increase burner, the heat burnt by burner intermediate fuel oil carrys out Heating Diesel Fuel
Machine waste gas.But, use burner to need new equipment, fuel consumption is also big simultaneously, increases
Energy consumption and cost.
On the other hand, the sump oil on ship, mud and plastics, cardboard, tin can, castoff
Need to process by the way of increasing incinerator burning in rubbish, and the current place to incinerator waste gas
Reason mode is, EGT is reduced to 350 DEG C with the generation avoiding two English, the most directly arrange
It is put in air, has the most both caused thermal loss, also result in the NO in waste gasXAtmosphere pollution.
Summary of the invention
It is an object of the invention to provide a kind of marine exhaust denitrating system, marine exhaust temperature can be made
Meet the temperature needed for SCR reacts and reduce atmospheric pollution.
The marine exhaust denitrating system of the present invention, including
Exhaust gas denitration pipeline, this exhaust gas denitration pipeline is connected by the exhaust end of the first valve with diesel engine
Connect；
Exhaust gas bypass pipeline, this exhaust gas bypass pipeline is connected by the exhaust end of the second valve with diesel engine
Connect；
Benitration reactor, this Benitration reactor is connected in this exhaust gas denitration pipeline；
Adding pipe line, this one end adding pipe line is connected by the gas outlet of the 3rd valve with incinerator
Connect, the other end and this exhaust gas denitration pipeline connection；
Heating bypass line, this heating bypass line is connected by the gas outlet of the 4th valve with incinerator
Connect；Wherein,
This first valve and the 3rd valve opening, this second valve and the 4th valve closing, burn
Burn furnace exhaust to add pipe line carry out mixing homoiothermic at this exhaust gas denitration pipeline with diesel exhaust through this
After, enter this Benitration reactor and carry out denitration and discharge；This first valve and the 3rd valve closing,
This second valve and the 4th valve opening, incinerator waste gas and diesel exhaust are respectively through this heating
Bypass line is expelled directly out with this exhaust gas bypass pipeline.
Further, the port of export of this Benitration reactor is provided with gas exhaust piping, and this gas exhaust piping passes through
Drain tap is connected with this exhaust gas denitration pipeline, and this exhaust gas denitration pipeline is being connected with this gas exhaust piping
Position after be provided with the 5th valve, this first valve, the 4th valve and the 5th valve closing,
3rd valve is opened with this drain tap, and incinerator waste gas adds pipe line, this exhaust gas denitration through this
Pipeline is discharged by this gas exhaust piping after entering this Benitration reactor.
Further, the pipeline between gas outlet and the entrance of this Benitration reactor of this incinerator is long
Degree is less than 2.5 meters.
Further, the exhaust end of this heating bypass line is connected with this exhaust gas bypass pipeline, and this is even
After the position connect is positioned at this second valve.
Further, the exhaust end of this exhaust gas denitration pipeline is connected with waste heat boiler, this exhaust gas bypass
The exhaust end of pipeline is connected with this waste heat boiler by the 6th valve.
Further, each valve is autocontrol valve.
Further, between this diesel engine and this marine exhaust denitrating system, it is provided with turbocharger,
This turbocharger includes exhaust gas inlet end, waste gas outlet end, air intlet end and air outlet slit end,
This exhaust gas inlet end is connected with the exhaust end of this diesel engine, this waste gas outlet end and this exhaust gas denitration pipe
Road, this exhaust gas bypass pipeline connect.
Further, being additionally provided with blender in this exhaust gas denitration pipeline, this blender is positioned at this denitration
Before reactor, this blender is provided with urea liquid spray gun.
Further, this Benitration reactor is provided with soot blower.
Further, this adds pipe line and is provided with the first air-introduced machine after the 3rd valve, this heating
Bypass line is provided with the second air-introduced machine after the 4th valve.
In embodiments of the invention, connect incinerator and exhaust gas denitration pipeline by adding pipe line, will
The high-temp waste gas of incinerator mixes with the waste gas of diesel engine, utilizes both temperature difference, improves bavin
The temperature of oil machine waste gas, reduces the temperature of incinerator waste gas, improves energy utilization efficiency, and make
The temperature of marine exhaust meets the temperature needed for denitration reaction.Meanwhile, incinerator waste gas and diesel engine
After waste gas mixing, temperature reduces, it is to avoid the generation of two English, incinerator waste gas in incinerator waste gas
Discharge after denitration reaction processes together with after mixing with diesel exhaust, be effectively reduced air dirty
Dye.
Accompanying drawing explanation
Fig. 1 is the composition frame chart of marine exhaust denitrating system in the embodiment of the present invention.
Detailed description of the invention
By further illustrate technological means that the present invention taked by reaching predetermined goal of the invention and
Effect, below in conjunction with accompanying drawing and preferred embodiment, to the detailed description of the invention of the present invention, structure,
Feature and effect thereof, after describing in detail such as.
Firstly the need of explanation, in this specification " before " with " afterwards " be with waste gas pipe
Flow direction in road is as reference direction, and " afterwards " i.e. refers to be positioned at the downstream of exhaust gas flow direction.
Referring to Fig. 1, the marine exhaust denitrating system of the embodiment of the present invention includes with diesel engine 10 even
The turbocharger 11 connect, is connected to the waste gas between turbocharger 11 and waste heat boiler 18 and takes off
Nitre pipeline 12 and exhaust gas bypass pipeline 13, be connected to incinerator 15 and exhaust gas denitration pipeline 12 it
Between add pipe line 16 and be connected to the heating between incinerator 15 and exhaust gas bypass pipeline 13
Bypass line 17.The marine exhaust denitrating system of the embodiment of the present invention also includes being positioned at exhaust gas denitration pipe
The first valve 121, blender 122, Benitration reactor 14 and the 5th valve 124 in road 12,
The second valve 131 and the 6th valve 132 being positioned in exhaust gas bypass pipeline 13, is positioned at and adds pipe line
The 3rd valve 161 and the first air-introduced machine 162 in 16, and be positioned in heating bypass line 17
The 4th valve 171 and the second air-introduced machine 172.Wherein, each valve in the embodiment of the present invention
It is autocontrol valve.
Turbocharger 11 is between diesel engine 10 and exhaust gas denitration system.Turbocharger 11
Including air intlet end 111, air outlet slit end 112, exhaust gas inlet end 113 and waste gas outlet end
114, wherein, air intlet end 111 and atmosphere, for the scavenging entrance of diesel engine 10, sky
The gas port of export 112 is connected with the inlet end 101 of diesel engine 10, exhaust gas inlet end 113 and diesel engine
The exhaust end 102 of 10 connects, waste gas outlet end 114 and exhaust gas denitration pipeline 12, exhaust gas bypass pipe
Road 13 connects, say, that exhaust gas denitration pipeline 12 and exhaust gas bypass pipeline 13 are connected to bavin
The exhaust end 102 of oil machine 10.
Exhaust gas denitration pipeline 12 is connected with the exhaust end 102 of diesel engine 10 by the first valve 121,
Blender 122, Benitration reactor 14 and the 5th valve 124 are connected in exhaust gas denitration pipeline 12,
5th valve 124 is between Benitration reactor 14 and waste heat boiler 18, and blender 122 is arranged
Before Benitration reactor 14, blender 122 is provided with urea liquid spray gun 123, urea liquid
Spray gun 123 is for being atomized urea liquid, and the effect of blender 122 is by urea liquid water
Solving the ammonia generated to be sufficiently mixed with waste gas, undercompounding can cause waste gas at Benitration reactor 14
Interior reaction is insufficient, not only results in exhaust-gas treatment the most up to standard, and the escaping of ammonia also can increase simultaneously.
Add pipe line 16 and connect incinerator 15 and exhaust gas denitration pipeline 12.Concrete, add pipe line
One end of 16 is connected with the gas outlet of incinerator 15 by the 3rd valve 161, adds pipe line 16
One end (exhaust end) is connected with exhaust gas denitration pipeline 12, and adds pipe line 16 and exhaust gas denitration pipe
After the link position on road 12 is positioned at the first valve 121.Further, for ensureing to enter waste gas
The incinerator exhausted air quantity of denitration pipeline 12 and prevent incinerator exhaust gas recirculation, adds pipe line 16
It is additionally provided with the first air-introduced machine 162 after three valves 161.
When the first valve the 121, the 3rd valve 161 and the 5th valve 124 are opened, diesel engine 10
The waste gas produced is in turbocharger 11 enters exhaust gas denitration pipeline 12, through turbocharger
The diesel exhaust temperature of 11 reduces, now, and the heated pipeline of waste gas 16 that incinerator 15 produces
Enter in exhaust gas denitration pipeline 12 and converge, due to the temperature of incinerator waste gas with diesel exhaust
Higher so that the temperature of the waste gas that diesel exhaust mixes with incinerator waste gas is higher than diesel engine
The temperature of waste gas, thus the temperature of waste gas is brought up to meet the temperature of denitration reaction.Mixed
Waste gas initially enters blender 122, decomposes, with urea liquid, the ammonia generated in blender 122
Enter in Benitration reactor 14 after being sufficiently mixed and carry out denitration, make NO, NO in waste gas2Gone back
Originally it was N2And H2O, finally, the waste gas after denitration enters waste heat boiler 18 through the 5th valve 124
Discharge after carrying out waste heat recovery.Further, in order to prevent the resistances such as dust in waste gas, particulate matter
The catalyst duct of plug Benitration reactor 14, (figure is not can to arrange soot blower in Benitration reactor 14
Show) catalyst coating is timed purging, the working media of this soot blower is high pressure air.
In the present embodiment, the minimum exit gas temperature of incinerator 15 is 850 DEG C, in order to avoid
The generation of two English, the waste gas of incinerator 15 should be at the model of the outlet 2.5m of distance incinerator 15
350 DEG C it are cooled to, therefore, between gas outlet and the exhaust gas denitration pipeline 12 of incinerator 15 in enclosing
Distance should shorten as far as possible, and the entering of the gas outlet of incinerator 15 and Benitration reactor 14
Length of pipe between Kou should be less than 2.5 meters so that the temperature of incinerator waste gas the shortest away from
350 DEG C are dropped to from interior.In the present embodiment, the mixing temperature of two kinds of waste gas is 310 DEG C～350 DEG C.
It is appreciated that the cooling rate of the temperature and incinerator waste gas that control waste gas mixing also can be by controlling
The mode of the capacity of incinerator 15 realizes.
The waste gas of the high-temp waste gas of incinerator 15 with diesel engine 10 is mixed by the embodiment of the present invention
Close, utilize both temperature difference, improve the temperature of diesel exhaust, reduce the temperature of incinerator waste gas,
Improve energy utilization efficiency, and make the temperature of marine exhaust meet the temperature needed for denitration reaction.
Meanwhile, after incinerator waste gas mixes with diesel exhaust, temperature reduces, it is to avoid in incinerator waste gas
The generation of two English, incinerator waste gas mix with diesel exhaust after together with through denitration reaction process
Rear discharge, is effectively reduced atmospheric pollution.
In the present embodiment, the groundwork medium of incinerator 15 be the sump oil on ship, mud and
The rubbish such as plastics, cardboard, tin can, castoff are when the amount of these rubbish is less, high
When the generation amount of temperature waste gas can not meet the purpose improving diesel exhaust temperature, also can be with combustion peculiar to vessel
Oil runs for medium.Be appreciated that the working media of incinerator 15 to burn away the refuse, and
Being auxiliary with fuel oil, even if using a small amount of fuel oil, waste gas is entered by its relatively direct use oil burner
Row heating, also saves most fuel oil consumption.
Continuing with seeing Fig. 1, further, in the present embodiment, the outlet of Benitration reactor 14
End is provided with gas exhaust piping 19, and gas exhaust piping 19 is by drain tap 191 and exhaust gas denitration pipeline 12
Connect.When the first valve the 121, the 4th valve 171 is closed with the 5th valve 124, the 3rd valve
161 with drain tap 191 open time, the heated pipeline of incinerator waste gas 16, exhaust gas denitration pipeline
Discharged by gas exhaust piping 19 after 12 entrance Benitration reactors 14.
Due to the SO in diesel exhaust3Meeting and NH3Reaction generates ammonium hydrogen sulfate, when temperature reduces
Time, ammonium hydrogen sulfate can condense at catalyst surface, blocking catalyst, long ammonium hydrogen sulfate
Condense, catalyst blockage can be caused, even inactivate.Therefore, fortune is stopped at Benitration reactor 14
During row, burn a small amount of fuel oil (not burning away the refuse) by incinerator 15, and by straight for incinerator waste gas
Connect into Benitration reactor 14, the temperature of Benitration reactor 14 is brought up to 350 DEG C, now sulfur
Acid hydrogen ammonium decomposes, and discharges from the drain tap 191 of gas exhaust piping 19 with waste gas, makes denitration anti-
The gas ammonium hydrogen sulfate content in device 14 is answered to be gradually lowered.After incinerator 15 runs two hours
It is believed that the ammonium hydrogen sulfate in Benitration reactor 14 is the most all discharged, now close incinerator 15,
Close drain tap 191.The embodiment of the present invention utilizes the high temperature of incinerator waste gas to make catalyst surface
Ammonium hydrogen sulfate volatilization, reach to make the purpose of catalyst regeneration in Benitration reactor 14.
Continuing with seeing Fig. 1, exhaust gas bypass pipeline 13 is by the second valve 131 and diesel engine 10
Exhaust end 102 connect, heating bypass line 17 is by the 4th valve 171 and incinerator 15
Gas outlet connects.
Further, the exhaust end of heating bypass line 17 is connected with exhaust gas bypass pipeline 13, and
After the position connected is positioned at the second valve 131, so, incinerator waste gas can be bypassed by heating
Pipeline 17 enters exhaust gas bypass pipeline 13, and the exhaust end of exhaust gas bypass pipeline 13 passes through the 6th valve
132 are connected with waste heat boiler 18.Additionally, for ensureing to enter the incinerator of exhaust gas bypass pipeline 13
Exhausted air quantity and prevent incinerator exhaust gas recirculation, heating bypass line 17 is after the 4th valve 171
It is additionally provided with the second air-introduced machine 172.
When the second valve the 131, the 4th valve 171 and the 6th valve 132 are opened, diesel engine 10
The waste gas produced is in turbocharger 11 enters exhaust gas bypass pipeline 13, and incinerator 15 produces
The heated bypass line of waste gas 17 enters in exhaust gas bypass pipeline 13, through the 6th valve after both mixing
Door 132 enters after waste heat boiler 18 carries out waste heat recovery and discharges.In the present embodiment, in order to keep away
Exempting from the generation of two English, the length of heating bypass line 17 also should shorten as far as possible.
It follows that the work process of the marine exhaust denitrating system of the present invention is described in detail as follows.
When boats and ships run in ECA region, open the first valve the 121, the 3rd valve 161,
With the 5th valve 124, simultaneously close off the second valve the 131, the 4th valve the 171, the 6th valve 132
With drain tap 191, the waste gas that diesel engine 10 produces enters exhaust gas denitration through turbocharger 11
In pipeline 12, the heated pipeline of waste gas 16 that incinerator 15 produces enters exhaust gas denitration pipeline 12
In and converge with diesel exhaust so that the waste gas that diesel exhaust mixes with incinerator waste gas
Temperature higher than the temperature of diesel exhaust, thus bring up to meet denitration reaction by the temperature of waste gas
Temperature.Mixed waste gas initially enters blender 122, molten with carbamide in blender 122
Liquid decomposes the gas after the ammonia generated is sufficiently mixed and enters in Benitration reactor 14 and carry out denitration,
Make NO, the NO in waste gas2It is reduced to N2And H2O, finally, the waste gas after denitration enters useless
Heat boiler 18 is discharged, to meet the exhaust emission requirements of current region after carrying out waste heat recovery.
When boats and ships are at non-ECA area operation, Benitration reactor 14 is closed, and urea liquid is closed,
The working media of incinerator 15 changes fuel oil into, now, closes the first valve the 121, the 4th valve
171 and the 5th valve 124, open the second valve the 131, the 3rd valve the 161, the 6th valve 132
With drain tap 191, the waste gas of diesel engine 10 through turbocharger 11 out after do not enter denitration
Reactor 14, and directly enter from exhaust gas bypass pipeline 13 and waste heat boiler 18 carries out waste heat recovery
Rear discharge, the heated pipeline of flue gas 16 of incinerator 15 non-combusted fuels generation, exhaust gas denitration pipeline
12 enter Benitration reactor 14, the temperature of Benitration reactor 14 bring up to 350 DEG C, now sulfur
Acid hydrogen ammonium decomposes, and discharges from the drain tap 191 of gas exhaust piping 19 with flue gas, makes denitration anti-
The catalyst in device 14 is answered to regenerate.
Incinerator 15 run after two hours it is believed that the ammonium hydrogen sulfate in Benitration reactor 14
All discharge, now, close incinerator 15, close the 3rd valve 161 and drain tap 191.
As incinerator 15 also needs to burn away the refuse, then open the 4th valve 171, make incinerator 15 produce
The heated bypass line of waste gas 17 enters exhaust gas bypass pipeline 13, and incinerator waste gas gives up with diesel engine
Gas converges rear temperature to be reduced, and enters waste heat boiler 18 through the 6th valve 132 and carry out waste heat recovery
Rear discharge.
In sum, the marine exhaust denitrating system of the present invention at least includes following advantage:
The present invention connects incinerator and exhaust gas denitration pipeline by adding pipe line, utilizes diesel engine and burns
Burn the waste gas temperature difference of stove, and control incinerator and the distance of diesel exhaust pipeline and capacity,
Make EGT reach denitration reaction temperature required while, it is achieved that the waste gas of incinerator is carried out
Cool down, avoid incinerator waste gas generates the purpose of two English, and incinerator smoke is taken off
Nitre processes, and decreases atmospheric pollution.Meanwhile, when Benitration reactor off-duty, will burn on a small quantity
Furnace exhaust is individually passed directly in Benitration reactor, utilizes the high temperature of waste gas to make urging of Benitration reactor
The ammonium hydrogen sulfate volatilization on agent surface, reaches the purpose of catalyst regeneration, extends making of catalyst
Use the life-span.
Finally, the present invention illustrates its effect reached with specific embodiment:
Embodiment one:
Certain 72000DWT bulk freighter, main engine power is 8000kw, and exhaust gas flow is 50000kg/h.
Diesel exhaust temperature through turbocharger is 235 DEG C, uses the marine exhaust of the present invention to take off
Nitre system, after incinerator waste gas mixes, temperature is up to 345 DEG C, it is possible to meets SCR and reacts institute
Need temperature.Meanwhile, and use compared with burner carries out heating, save fuel oil (marine diesel oil MDO)
Consume and be about 20kg/h.
Embodiment two:
Certain 150000DWT crude oil carrier, main engine power is 15000kw, and exhaust gas flow is about
130000kg/h, the diesel exhaust temperature through turbocharger is 225 DEG C, uses the present invention
Marine exhaust denitrating system, after incinerator waste gas mixes, temperature is up to 340 DEG C, it is possible to full
Foot SCR reaction is temperature required.Meanwhile, and use compared with burner carries out heating, save fuel oil (ship
Use diesel oil MDO) consume about 37.5kg/h.
Embodiment three:
Certain 2000TEU container ship, main engine power is 17000kw, and exhaust gas flow is
150000kg/h, the diesel exhaust temperature through turbocharger is 230 DEG C, uses the present invention
Marine exhaust denitrating system, after incinerator waste gas mixes, temperature is up to 340 DEG C, it is possible to full
Foot SCR reaction is temperature required.Meanwhile, and use compared with burner carries out heating, save fuel oil (ship
Use diesel oil MDO) consume about 41kg/h.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any shape
Restriction in formula, although the present invention is disclosed above with preferred embodiment, but is not limited to
The present invention, any those skilled in the art, in the range of without departing from technical solution of the present invention,
When the technology contents of available the disclosure above makes a little change or is modified to the equivalence of equivalent variations
Embodiment, as long as being without departing from technical solution of the present invention content, according to the technical spirit pair of the present invention
Any simple modification, equivalent variations and the modification that above example is made, all still falls within skill of the present invention
In the range of art scheme.
Claims (10)
1. a marine exhaust denitrating system, it is characterised in that: include
Exhaust gas denitration pipeline (12), this exhaust gas denitration pipeline (12) passes through the first valve (121)
It is connected with the exhaust end (102) of diesel engine (10)；
Exhaust gas bypass pipeline (13), this exhaust gas bypass pipeline (13) passes through the second valve (131)
It is connected with the exhaust end (102) of diesel engine (10)；
Benitration reactor (14), this Benitration reactor (14) is connected to this exhaust gas denitration pipeline (12)
In；
Add pipe line (16), this add one end of pipe line (16) by the 3rd valve (161) with
The gas outlet of incinerator (15) connects, and the other end connects with this exhaust gas denitration pipeline (12)；
Heating bypass line (17), this heating bypass line (17) passes through the 4th valve (171)
It is connected with the gas outlet of incinerator (15)；Wherein,
This first valve (121) and the 3rd valve (161) are opened, this second valve (131)
Closing with the 4th valve (171), incinerator waste gas adds pipe line (16) and diesel engine through this
Waste gas, after this exhaust gas denitration pipeline (12) carries out mixing homoiothermic, enters this Benitration reactor (14)
Carry out denitration and discharge；This first valve (121) and the 3rd valve (161) are closed, this
Two valves (131) are opened with the 4th valve (171), and incinerator waste gas divides with diesel exhaust
It is not expelled directly out with this exhaust gas bypass pipeline (13) through this heating bypass line (17).
2. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this denitration is anti-
The port of export answering device (14) is provided with gas exhaust piping (19), and this gas exhaust piping (19) passes through aerofluxus
Valve (191) is connected with this exhaust gas denitration pipeline (12), and this exhaust gas denitration pipeline (12) exists
It is provided with the 5th valve (124), this first valve after the position being connected with this gas exhaust piping (19)
(121), the 4th valve (171) and the 5th valve (124) closedown, the 3rd valve (161)
Opening with this drain tap (191), incinerator waste gas adds pipe line (16) through this, this waste gas takes off
Nitre pipeline (12) is discharged by this gas exhaust piping (19) after entering this Benitration reactor (14).
3. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this incinerator
(15) the length of pipe between gas outlet and the entrance of this Benitration reactor (14) is less than 2.5
Rice.
4. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: by this heating
The exhaust end on siphunculus road (17) is connected with this exhaust gas bypass pipeline (13), the position, position of this connection
After this second valve (131).
5. marine exhaust denitrating system as claimed in claim 3, it is characterised in that: this waste gas takes off
The exhaust end of nitre pipeline (12) is connected with waste heat boiler (18), this exhaust gas bypass pipeline (13)
Exhaust end be connected with this waste heat boiler (18) by the 6th valve (132).
6. the marine exhaust denitrating system as described in claim 2 or 5, it is characterised in that: each valve
Door is autocontrol valve.
7. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this diesel engine
And between this marine exhaust denitrating system, be provided with turbocharger (11), this turbocharger (10)
(11) exhaust gas inlet end (113), waste gas outlet end (114), air intlet end (111) are included
Exhaust end with air outlet slit end (112), this exhaust gas inlet end (113) and this diesel engine (10)
(102) by connection, this waste gas outlet end (114) and this exhaust gas denitration pipeline (12), this waste gas
Siphunculus road (13) connects.
8. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this waste gas takes off
Being additionally provided with blender (122) in nitre pipeline (12), it is anti-that this blender (122) is positioned at this denitration
Before answering device (14), this blender (122) is provided with urea liquid spray gun (123).
9. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this denitration is anti-
Answer in device (14) and be provided with soot blower.
10. marine exhaust denitrating system as claimed in claim 1, it is characterised in that: this heating
Pipeline (16) is provided with the first air-introduced machine (162) after the 3rd valve (161), this heating
Bypass line (17) is provided with the second air-introduced machine (172) after the 4th valve (171).
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| CN201610474217.5A CN105944567B (en) | 2016-06-24 | 2016-06-24 | Marine exhaust denitrating system |
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| CN201610474217.5A CN105944567B (en) | 2016-06-24 | 2016-06-24 | Marine exhaust denitrating system |
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| CN105944567A true CN105944567A (en) | 2016-09-21 |
| CN105944567B CN105944567B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610474217.5A Active CN105944567B (en) | 2016-06-24 | 2016-06-24 | Marine exhaust denitrating system |
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| Country | Link |
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| CN (1) | CN105944567B (en) |
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| CN106731832A (en) * | 2017-01-09 | 2017-05-31 | 青岛双瑞海洋环境工程股份有限公司 | Marine exhaust denitrating system |
| CN107143418A (en) * | 2017-05-12 | 2017-09-08 | 哈尔滨工程大学 | A kind of low-speed diesel engine SCR system and its control method suitable for high-sulfur fuel oil |
| CN111108269A (en) * | 2017-09-29 | 2020-05-05 | 大陆汽车有限公司 | Method for selective catalytic reduction by desorption of ammonia from a cartridge in an exhaust line |
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