CN107890773A - A kind of marine diesel waste gas Dry Desulphurisation System and sulfur method - Google Patents
A kind of marine diesel waste gas Dry Desulphurisation System and sulfur method Download PDFInfo
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- CN107890773A CN107890773A CN201711220779.8A CN201711220779A CN107890773A CN 107890773 A CN107890773 A CN 107890773A CN 201711220779 A CN201711220779 A CN 201711220779A CN 107890773 A CN107890773 A CN 107890773A
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- waste gas
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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
- B01D53/81—Solid phase processes
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- 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
- B01D53/565—Nitrogen oxides by treating the gases with solids
-
- 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
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- 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
Abstract
The invention discloses a kind of marine diesel waste gas Dry Desulphurisation System and sulfur method, belongs to marine diesel exhaust after-treatment techniques field.Marine diesel waste gas Dry Desulphurisation System includes dry type desulfurizing absorption tower, absorbent supplying module, waste storage module, bed heating module, regulating fan and control monitoring modular, in diesel exhaust temperature range, desulfurization absorbent is used as using 2~8mm of diameter porous type calcium hydroxide particle, pass through uniform staggered intake and exhaust, the desulfuration absorbing tower structure of multilayer deflector type mixed flow, fully improve the reaction effect of high-sulfur waste gas and absorbent calcium hydroxide, remove the SOx in waste gas, and utilize the heat transfer of desulfurizing tower, mass transfer characteristic, incidentally remove part CO in waste gas2, the pernicious gas such as NOx, solve the practical problems such as high energy consumption, the high water volume of spot ship waste gas wet type desulfurizing technology, reduce corrosivity of the waste gas to discharge duct, reduce the discharge of haze predecessor, there is higher economy, environmental benefit.
Description
Technical field
The invention belongs to marine diesel exhaust after-treatment techniques field, and in particular to a kind of marine diesel waste gas dry type
Desulphurization system and a kind of marine diesel waste gas dry desulfurization process.
Background technology
Because Ship Power Equipment waste gas causes serious harm, marine exhaust pollution to marine atmosphere and harbour environment
The extensive concern of international community is caused.In order to reduce pollution of the ship exhaust to ambient air, countries in the world and international organization
Different ship Abgasgesetzs has been formulated in succession, and has planned to enforce stricter sulphur oxygen in emission control region (ECA)
Compound (NOx), nitrogen oxides (SOx) discharge standard.At the same time, Department of Transportation of China is also by Pearl River Delta, the Yangtze River Delta, ring Bohai Sea
Extra large (Jing-jin-ji region) waters is established as ship and sets up ship Air Pollutant Emission control zone, with control China's ship oxysulfide,
Nitrogen oxides and granular material discharged.
Different from coal fired power plant power set, Ship Power Equipment working space is limited, cost-effectiveness requirement is high, and discharges control
Standard processed is increasingly strict.Land is difficult to apply to ship with desulphurization and denitration technology used by power station, or is difficult to directly apply to
Ship.At present, marine exhaust washing desulphurization technology is divided into dry washing and wet scrubbing, but special due to Ship Power Equipment
Property, marine exhaust washing selects wet desulphurisation system mostly.
The advantages such as desulfuration efficiency is high although wet scrubbing desulfurization technology peculiar to vessel has, operation and maintenance cost is low, wet type
Desulphurization system complex process, equipment investment are big, and discharge saturation waste gas entrainment sulfate, are easily caused the secondary pollutions such as haze.This
Outside, it is contemplated that forbid directly discharging SO with greater coasting area in harbourxThe limitation of washing system waste water, wet scrubbing system need to increase volume
Waste water caused by outer spatial manipulation ship's navigation, the waste water for meeting discharge standard is discharged into sea again after entering high sea
In.
Use is than wide in conglomerate for Dry Desulphurisation System, a kind of dry-type desulphurization device of patent
(CN201110392798.5), a kind of medium temperature dry type circulating fluidized bed fume desulfurizing method and device (CN98120507.0) are main
Dry Desulphurisation System used in station boiler device is disclosed, but such system is mainly used in coal fired power plant, it is coal-fired
Power set can generate new pollutant during power is provided, and absorbent uses the alkaline powders such as caustic soda, calcium hydroxide,
And absorbent sprays into desulfurizing tower in the form of suspended things etc., and the absorbent of suspended things is not easy to discharge in desulfurizing tower, uses effect
Rate is not high.
A kind of plasma dry fume desulphurization method (CN201410833747.5) of patent discloses a kind of dry type peculiar to vessel
Desulphurization system, its using plasma auxiliary desulfurizing filter, using plasma technique by SO2It is oxidized to SO3, SO3With desulfurization
Carbonate sorbing material reaction generation sulfate and carbon dioxide in filter, this method desulfurized effect is preferable, but cost
It is higher, and be limited only to remove sulfide, use limitation.
In order to solve the actual application problem of wet type desulfurizing technology peculiar to vessel, the present invention proposes a kind of suitable for using high-sulfur combustion
The marine diesel waste gas Dry Desulphurisation System of oil, i.e., in diesel exhaust temperature range (240 DEG C~450 DEG C), using more
Pass calcium hydroxide (CaOH2O) particle is inhaled as desulfurization absorbent, diesel engine or boiler waste gas and the graininess in absorption tower
Receive agent to contact, the SO in waste gasxChemically reacted with calcium hydroxide, remove the SO in waste gasx, and the heat transfer of utilization desulfurizing tower,
Mass transfer characteristic, incidentally remove part CO in waste gas2、NOxDeng pernicious gas.
The content of the invention
It is an object of the invention to provide one kind efficiently to remove sulphide removal, while removes other pernicious gases and operating efficiency
Marine diesel waste gas Dry Desulphurisation System and sulfur method high, use cost is low.
The object of the present invention is achieved like this：
The invention discloses a kind of marine diesel waste gas Dry Desulphurisation System, including dry type desulfurizing absorption tower, absorbent
Supplying module, waste storage module, bed heating module 12, regulating fan 13 and control monitoring modular, dry type desulfurizing absorption tower
Including air inlet 1, uniform tower air admission hole 2, umbellate form air intake duct 3, umbellate form exhaust duct 4, uniform tower steam vent 5, it is vented out
Mouth 6, absorbent granules entrance 7, absorbent supplying layer 8, waste material discharge layer 9, waste outlet 10 and desulfurization bed 11；Dry type desulfurizing
Absorption tower is located at diesel engine exhaust system end, is connected after uniform tower steam vent 5 with regulating fan 13, absorbent supply mould
Block connection absorbent supplying layer 8, bed heating module 12 is arranged in desulfurization bed 11, the connection waste material discharge of waste storage module
Layer 9, control monitoring modular are connected by temperature, pressure and component measuring point with dry type desulfurizing absorption tower and other modules.
Preferably, described umbellate form air intake duct 3 is staggered with umbellate form exhaust duct 4 in desulfurization bed 11, is rolled in multilayer
Streaming structure.
Preferably, desulfurization absorbent is filled with described absorbent supplying layer 8, waste material discharge layer 9 and desulfurization bed 11,
Desulfurization absorbent uses porous type calcium hydroxide (CaOH2O) particle, surface are covered with irregular cavernous structure, and desulfurization absorbs
Agent particle diameter is 2~8mm.
The invention also discloses a kind of marine diesel waste gas dry desulfurization process, the high-sulfur waste gas of diesel engine discharge passes through
Air inlet 1 enters inside dry type desulfurizing absorption tower, by uniform tower air admission hole 2, umbellate form air intake duct 3, into desulfurization bed
11, with the abundant haptoreaction of desulfurization absorbent, remove the SO in waste gasxAnd part CO2、NOx, then waste gas be vented through umbellate form
Road 4, uniform tower steam vent 5 flow out dry type desulfurizing absorption tower from air exit 6, and row is into air after regulating fan 13；Control
Temperature, pressure and component measuring point are distributed with the junction on dry type desulfurizing absorption tower and other modules for monitoring system processed, and collection is dry
Formula desulfuration absorbing tower waste air temperature at inlet, desulfurization bed temperature, dry type desulfurizing absorption tower inlet pressure, dry type desulfurizing absorption tower go out
Mouth pressure, dry type desulfurizing absorption tower outlet SO2/CO2Value, bed heating system run signal and regulating fan run signal, it has
The control method of body is as follows：
(1) operating temperature range of Dry Desulphurisation System is set as 240 DEG C~450 DEG C, control and monitoring system collection dry type
Desulfuration absorbing tower waste air temperature at inlet, if dry type desulfuration absorbing tower waste air temperature at inlet is less than the operating temperature of Dry Desulphurisation System
Scope, operation bed heating module 12, heating EGT is until reach operating temperature range；If dry type desulfuration absorbing tower import
EGT is in the operating temperature range of Dry Desulphurisation System, then does not run bed heating system；
(2) setting the pressure of Dry Desulphurisation System allows range of operation as 600~1500Pa, and control and monitoring system collection is dry
Formula desulfuration absorbing tower inlet pressure and outlet pressure, if both pressure difference values allow to run higher than the pressure of Dry Desulphurisation System
Scope, booster fan is run, make up exhaust gas pressure loss；
(3) SO of Dry Desulphurisation System is set2/CO2Value, control and monitoring system collection dry type desulfurizing absorption tower outlet SO2/
CO2Value, if its numerical value is higher than SO2/CO2Setting value, then waste material discharge layer discharge part saturable absorber, absorbent supplying layer to
Desulfurization bed inputs new desulfurization absorbent.
The beneficial effects of the present invention are：The present invention proposes a kind of marine diesel waste gas Dry Desulphurisation System and desulfurization
Method, it can efficiently remove the SO in the removing waste gas in waste gasx, and attach part CO in removing waste gas2、NOxEtc. harmful gas
Body；Meanwhile the present invention solves the practical problems such as high energy consumption, the high water volume of spot ship waste gas wet type desulfurizing technology, and locate
Waste gas moisture-free and sulfate after reason, corrosivity of the waste gas to discharge duct is alleviated, and reduce the row of haze predecessor
Put, there is higher economy, environmental benefit.
Brief description of the drawings
Fig. 1 is the structural representation on dry type desulfurizing absorption tower in the present invention；
Fig. 2 is the process principle figure of dry desulfurization process in the present invention；
Fig. 3 is Dry Desulphurisation System intermediate fuel oil sulfur content in the present invention and diesel exhaust SO2/CO2Ratio table.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
With reference to Fig. 1, the invention discloses a kind of marine diesel waste gas Dry Desulphurisation System, including dry type desulfurizing to absorb
Tower, absorbent supplying module, waste storage module, bed heating module 12, regulating fan 13 and control monitoring modular, waste gas are done
Formula desulphurization system arranges uniform tower air admission hole 2, umbrella using dry type desulfurizing absorption tower as nucleus equipment inside dry type desulfurizing absorption tower
Type air intake duct 3, umbellate form exhaust duct 4, uniform tower steam vent 5, absorbent supplying layer 8, waste material discharge layer 9 and desulfurization bed
11, dry type desulfurizing absorption tower is located at diesel engine exhaust system end, is connected after uniform tower steam vent 5 with regulating fan 13,
Absorbent supplying module connection absorbent supplying layer 8, bed heating module 12 is arranged in desulfurization bed 11, waste storage module
Waste material discharge layer 9 is connected, control monitoring modular passes through temperature, pressure and component measuring point and dry type desulfurizing absorption tower and other modules
Connection.
The high-sulfur waste gas of diesel engine discharge is directly entered inside dry-type desulfurizing tower, is entered by uniform tower air admission hole 2, umbellate form
Air flue 3, into desulfurization bed 11, with the abundant haptoreaction of absorbent granules, remove the SO in waste gasxAnd part CO2、NOx,
Then waste gas flows out dry-type desulfurizing tower through umbellate form exhaust duct 4, uniform tower steam vent 5, and row is into air after regulating fan 13.
Dry Desulphurisation System is installed on boat diesel engine gas extraction system end, and marine diesel exhaust gas temperature after turbine one
As in the range of 200 DEG C~400 DEG C, only part marine low-speed high-power diesel engine EGT can be less than 200 DEG C.Ship bavin
After the high-sulfur waste gas of oil machine discharge flows through waste heat boiler, into the desulfurizing tower of filling absorbent, sent out with absorbent calcium hydroxide
Biochemical reaction, remove the SO in waste gas2、SO3, its chemical reaction is：
SO2+Ca(OH)2→CaSO3+H2O
SO3+Ca(OH)2→CaSO4+H2O
2CaSO3+O2→2CaSO4
CaSO4+2H2O→CaSO4·2H2O
In addition, when EGT is less than 400 DEG C, CO2, NO can also chemically react with absorbent in waste gas, and it is changed
Learning reaction equation is：
CO2+Ca(OH)2→CaCO3+H2O
4NO+3O2+2Ca(OH)2→2Ca(NO3)2+2H2O
In order to increase the contact area of high-sulfur waste gas and absorbent, absorbent uses 2~8mm of diameter porous type hydroxide
Calcium (CaOH2O) particle, and its surface is covered with irregular cavernous structure.Meanwhile uniform tower is arranged inside desulfuration absorbing tower
Port 2, umbellate form entering and exhaust channel 3, using multilayer deflector type design structure, when increasing the reaction of high-sulfur waste gas and absorbent
Between, to improve desulfuration efficiency.
With reference to Fig. 2, control and monitoring system collection desulfurizing tower waste air temperature at inlet A, desulfurization bed temperature B, desulfurizing tower import
Pressure D, desulfurizing tower outlet pressure E, desulfurizing tower outlet SO2/CO2Value, bed heating system run signal J and booster fan operation
Signal H, its working method are divided into three parts：First, control and monitoring system I gather desulfurizing tower waste air temperature at inlet A, at its numerical value
In 240 DEG C in its operating temperature range~450 DEG C, then bed heating system 12 need not be run, on the contrary, then running bed heating
System 12, its bed temperature B is set to be higher than 240 DEG C；Second, control and monitoring system I collection desulfurizing tower inlet pressure D, desulfurizing tower go out
Mouth pressure E, both pressure difference values then run booster fan 13, more higher than desulphurization system operation allowed band (600~1500Pa)
Waste filling atmosphere pressure losses；The desulfurizing tower outlet SO of 3rd, control and monitoring system I collection2/CO2Value G, its numerical value are higher than SO2/CO2
Setting value F, as shown in figure 3, the then waste material discharge discharge part saturable absorber of layer 9, the inside fresh absorbent of absorbent supplying layer 8
Into desulfurization bed 11.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (4)
1. a kind of marine diesel waste gas Dry Desulphurisation System, including dry type desulfurizing absorption tower, absorbent supplying module, waste material storage
Storing module, bed heating module (12), regulating fan (13) and control monitoring modular, it is characterised in that：Dry type desulfurizing absorption tower
Including air inlet (1), uniform tower air admission hole (2), umbellate form air intake duct (3), umbellate form exhaust duct (4), uniform tower steam vent
(5), air exit (6), absorbent granules entrance (7), absorbent supplying layer (8), waste material discharge layer (9), waste outlet (10)
And desulfurization bed (11)；Dry type desulfurizing absorption tower is located at diesel engine exhaust system end, and uniform tower steam vent (5) is afterwards and pressure regulation
Blower fan 13 is connected, and absorbent supplying module connection absorbent supplying layer (8), bed heating module (12) is arranged in desulfurization bed
(11) in, waste storage module connection waste material discharge layer (9), control monitoring modular is by temperature, pressure and component measuring point with doing
Formula desulfuration absorbing tower and the connection of other modules.
A kind of 2. marine diesel waste gas Dry Desulphurisation System according to claim 1, it is characterised in that：Described umbellate form
Air intake duct (3) is staggered with umbellate form exhaust duct (4) in desulfurization bed (11), in multilayer deflector type structure.
A kind of 3. marine diesel waste gas Dry Desulphurisation System according to claim 1, it is characterised in that：Described absorption
Desulfurization absorbent is filled with agent supplying layer (8), waste material discharge layer (9) and desulfurization bed (11), desulfurization absorbent is using porous
Type calcium hydroxide (CaOH2O) particle, surface are covered with irregular cavernous structure, and desulfurization absorbent particle diameter is 2~8mm.
4. a kind of marine diesel waste gas dry desulfurization process, it is characterised in that the high-sulfur waste gas of diesel engine discharge passes through air inlet
Entrance (1) enters inside dry type desulfurizing absorption tower, by uniform tower air admission hole (2), umbellate form air intake duct (3), into desulfurization bed
Layer (11), with the abundant haptoreaction of desulfurization absorbent, remove the SO in waste gasxAnd part CO2、NOx, then waste gas is through umbellate form
Exhaust duct (4), uniform tower steam vent (5) are from air exit (6) outflow dry type desulfurizing absorption tower, through regulating fan (13) heel row
Into air；Temperature, pressure and component is distributed with the junction on dry type desulfurizing absorption tower and other modules in control and monitoring system
Measuring point, collection dry type desulfurizing absorption tower waste air temperature at inlet, desulfurization bed temperature, dry type desulfurizing absorption tower inlet pressure, dry type
Desulfuration absorbing tower outlet pressure, dry type desulfurizing absorption tower outlet SO2/CO2Value, bed heating system run signal and regulating fan
Run signal, its specific control method are as follows：
(1) operating temperature range of Dry Desulphurisation System is set as 240 DEG C~450 DEG C, control and monitoring system collection dry type desulfurizing
Absorption tower waste air temperature at inlet, if dry type desulfuration absorbing tower waste air temperature at inlet is less than the operating temperature model of Dry Desulphurisation System
Enclose, operation bed heating module 12, heating EGT is until reach operating temperature range；If dry type desulfuration absorbing tower import is given up
Temperature degree is in the operating temperature range of Dry Desulphurisation System, then does not run bed heating system；
(2) setting the pressure of Dry Desulphurisation System allows range of operation as 600~1500Pa, and control and monitoring system collection dry type takes off
Sulphur absorption tower inlet pressure and outlet pressure, if both pressure difference values allow to run model higher than the pressure of Dry Desulphurisation System
Enclose, run booster fan, make up exhaust gas pressure loss；
(3) SO of Dry Desulphurisation System is set2/CO2Value, control and monitoring system collection dry type desulfurizing absorption tower outlet SO2/CO2Value,
If its numerical value is higher than SO2/CO2Setting value, then waste material discharge layer discharge part saturable absorber, absorbent supplying layer is to desulfurization bed
Layer inputs new desulfurization absorbent.
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| CN201711220779.8A CN107890773A (en) | 2017-11-29 | 2017-11-29 | A kind of marine diesel waste gas Dry Desulphurisation System and sulfur method |
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Cited By (4)
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| CN108479374A (en) * | 2018-06-14 | 2018-09-04 | 江苏华本环境科技有限公司 | A kind of double tower desulfurizer |
| CN109999628A (en) * | 2019-04-15 | 2019-07-12 | 哈尔滨工程大学 | Based on the axial flue gas desulphurization unit for absorbing diffusion, desulfurizing method of exhaust gas and for the control system of flue gas desulphurization unit |
| CN110605023A (en) * | 2019-10-30 | 2019-12-24 | 苏州仕净环保科技股份有限公司 | Marine diesel engine exhaust gas desulfurization system with monitoring function |
| CN114768517A (en) * | 2022-05-13 | 2022-07-22 | 中素新科技有限公司 | Flue gas treatment method |
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| CN110605023A (en) * | 2019-10-30 | 2019-12-24 | 苏州仕净环保科技股份有限公司 | Marine diesel engine exhaust gas desulfurization system with monitoring function |
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| CN114768517A (en) * | 2022-05-13 | 2022-07-22 | 中素新科技有限公司 | Flue gas treatment method |
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Application publication date: 20180410 |