CN107511075A - A kind of new spray column removes ship tail gas NO simultaneouslyxAnd SO2Device and method - Google Patents
A kind of new spray column removes ship tail gas NO simultaneouslyxAnd SO2Device and method Download PDFInfo
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- CN107511075A CN107511075A CN201710717245.XA CN201710717245A CN107511075A CN 107511075 A CN107511075 A CN 107511075A CN 201710717245 A CN201710717245 A CN 201710717245A CN 107511075 A CN107511075 A CN 107511075A
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- flue gas
- sodium peroxydisulfate
- new spray
- sea water
- tail 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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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
- B01D53/343—Heat recovery
-
- 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
- B01D53/60—Simultaneously removing sulfur oxides and 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
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/608—Sulfates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The present invention removes ship tail gas NOx and SO simultaneously for a kind of new spray column2Device and method, use the technology that sodium peroxydisulfate advanced oxidation processes and urea reduction method are combined by the NO gases in NOx gases finally with N by solvent, activator and desulfurization absorbent of seawater2Form remove, realize the processing to ship tail gas desulfurization and denitrification integral, utilize fume afterheat to carry out reaction reagent activation and the concentrated extract of waste liquid.The present invention is using desulfurization and denitrification reaction device of the new spray scrubber 11 with aperture air distribution plate 12 as main body, velocity gradient caused by flow of fluid and the average wave amplitude increase of pressure in new spray scrubber 11, shearing force field is stronger, and pulsation is stronger, is more beneficial for the turbulence mixing of inside.Aperture air distribution plate 12 is capable of the gas-liquid contact in efficient hardening impinging stream reaction area 24, the reagent droplet of loss is obtained effective Collection utilization, improves W-response effect and reagent treatment utilization rate.
Description
Technical field
The invention belongs to boat diesel engine technical field of waste gas treatment, and in particular to a kind of new spray column removes ship simultaneously
Vessel exhaust NOx and SO2Device and method.
Background technology
Ship combusting heavy oil during navigation can produce substantial amounts of pernicious gas, and pernicious gas composition is that NOx (is mainly
NO) and SOx (is mainly SO2) acid rain and photochemical fog can be caused, it is detrimental to health and environment.Therefore, International Maritime
A series of anti-pollution conventions have been organized to set up, harmful components discharge in ship tail gas has strictly been limited.Meanwhile various countries also exist
Active development ship tail gas processing unit, to NOx the and SOx processing in tail gas.
Increasingly strict with regulation, combined desulfurization and denitration technology is imperative.But existing United Technologies are present as before
Phase investment is big, floor space is big, system administration is complicated, equipment is perishable, catalyst leakage and the problems such as the Effects of Salinity of marine site.
Therefore, a kind of focus for turning into Recent study suitable for ship tail gas desulfurization and denitrification integral technology is developed.Desulphurization denitration one
Body technology can complete the processing procedure of tail gas in a tower, reduce the investment cost of equipment, reduce vent gas treatment dress
The floor space put, make integral device management easy and effective.The difficult point of desulfurization and denitrification integral technology is how to solve tail gas
In be insoluble in the NO gas removal problems of the aqueous solution, sodium peroxydisulfate advanced oxidation processes can be good at solving such in the prior art
Problem.
Application No. 201310683163.X patent proposes a kind of using fume afterheat high-temperature activation sodium peroxydisulfate
The system and method for desulphurization denitration, the activation generation that this method mainly carries out sodium peroxydisulfate using the waste heat of flue gas have Strong oxdiative
The active sulfur acid group free radical of property, realizes desulfurization and denitrification integral, it is sulfuric acid and nitric acid to remove final product.Although this method
Effectively solve the problems, such as desulfurization and denitrification integral, but the final product of this method is two kinds of strong acid of nitric acid and sulfuric acid, pair set
Standby antiacid corrosivity requires higher, for ship, places two kinds of high strong acid in limited space and adds ship's navigation
Danger coefficient.And the preservation equipment of two kinds of strong acid will also occupy the useful space of ship.Tail gas residual temperature temperature is higher, over cure
The activation temperature of sour sodium is not the higher the better, and activation process has its optimal temperature range, and the device is difficult that control is effective living
Change temperature, be optimal activation.
The patent of Application No. 201510192027.X and Application No. 201520244728.9 proposes a kind of pre-oxidation skill
The desulfurization denitration demercuration integral method that art is combined with Wet technique, this method by hydrogen peroxide, ammonium persulfate, sodium peroxydisulfate and
One or more kinds of mixed solutions of potassium peroxydisulfate are the main reagent of desulphurization denitration, are hit two nozzles with uviol lamp are opposed
Hit in flow reactor to the SO in tail gas2, NOx and Hg harmful substances are removed.Hit Flow Technique and be applied to alkali lye desulfurization
Quick irreversible chemical absorption process, but desulfuration efficiency is relatively low, denitration efficiency is even more that it is impossible to meet emission regulation demands.And
And the key reaction area of two opposed jets reactor is in impingement region, the fine differences of two nozzle gas velocity can be with
Cause the skew by a relatively large margin of striking face, or even striking face oscillatory occurences occurs.Impurity in flue gas can be covered in ultraviolet spoke
According to the surface waited, the activation of ultraviolet irradiation technology is hindered, it is necessary to which periodic maintenance, adds maintenance cost.Activation of catalyst
The cost of desulphurization denitration technology is more the increase in, and the addition of catalyst can introduce new ion component, increase at waste liquid
The live load of unit is managed, increases cost.
The patent of Application No. 201410240142.5 proposes a kind of gas cleaning using ozone activation persulfate
Method and apparatus.Ozone in patent in flue gas contacts with the persulfate in solution in bubbling-spray two section reactor
Strong oxidative free radical is produced afterwards to be used for removing the SO in flue gas2, NOx, mercury, H2The harmful substances such as S and VOCs.Dress described in the patent
Put and method increases the equipment investment of vent gas treatment, ozone needs current limitation, and increase ozone generating-device not only increases
Equipment investment, floor space is further increased, reduce the effective space of ship.And the end-product composition handled by this method is more
It is complicated, it is necessary to reclaimed by post-processing unit, corresponding collector unit also is provided with ship, this also adds ship tail simultaneously
The floor space of gas control device.
In summary, developed for the method for handling ship tail gas existing at present there is various deficiencies
A kind of economical and effective and it is applicable under any operating mode while handles NOx and the method and device of the harmful substance such as SOx, is ship tail gas
The important research direction of Treatment process.
The content of the invention
For the defects of ship tail gas treatment technology is present in currently available technology, the present invention is intended to provide one kind is with seawater
As solvent, activator and desulfurization absorbent, the technology being combined using sodium peroxydisulfate advanced oxidation processes and urea reduction method
New spray column removes ship tail gas NOx and SO simultaneously2Device and method.
The object of the present invention is achieved like this：
The present invention removes ship tail gas NOx and SO simultaneously for a kind of new spray column2Device and method, including ship bavin
It is oil machine 1, sea water supply pump 2, sodium peroxydisulfate sea water solution blender 3, flue gas four-way shunting valve 4, urea storage tank 5, de-
Sulphur denitration reagent mixer 6, desulphurization denitration reagent supply pump 7, scrubbing tower import flue gas four-way control valve 8, waste liquid inspissator 9,
Enriched product storage box 10, new spray scrubber 11, aperture air distribution plate 12, opposed nozzle 13, greasy dirt and impurity storage box 14,
Waste trap 15, temperature controller 16, sodium peroxydisulfate storage box 17, sea water supply control valve 18, flue gas supply control valve
19th, scrubbing tower smoke inlet 20, inspissator smoke inlet 21, inspissator waste liquid entrance 22, inspissator exhanst gas outlet 23, percussion flow
Reaction zone 24, shell and tube flue 25, air distribution plate upper strata nozzle 26, air distribution plate underlying nozzle 27, it is characterised in that：Described one kind
New spray column removes ship tail gas NOx and SO simultaneously2Method be using seawater as solvent, activator and desulfurization absorbent,
Use the technology that sodium peroxydisulfate advanced oxidation processes and urea reduction method are combined by the NO gases in NOx gases finally with N2's
Form removes, and realizes the processing to ship tail gas desulfurization and denitrification integral, carries out reaction reagent activation using fume afterheat and gives up
The concentrated extract of liquid；Comprise the following steps that：
1. tail gas is divided into three parts and enters processing system；
2. configure sodium peroxydisulfate sea water solution；
3. configure desulphurization denitration reagent；
4. handle flue gas；
5. handle waste.
Described step 1 is specific as follows：
Flue gas flows through flue gas four-way shunting valve 4, Part I cigarette by pipeline caused by 1.1 boat diesel engines 1
Air-flow is entered inside the shell and tube flue 25 in sodium peroxydisulfate sea water solution blender 3 through flue gas supply control valve 19, there is provided
Strengthen the heat energy of activation for sodium peroxydisulfate, then discharged by shell and tube flue 25, controlled by scrubbing tower import flue gas four-way
Valve 8 is entered inside new spray scrubber 11；Part II flue gas is then by scrubbing tower import flue gas four-way control valve 8 by washing
Tower flue gas entrance 20 is washed to enter inside new spray scrubber 11；Part III flue gas is entered by inspissator smoke inlet 21
The top of waste liquid inspissator 9, is contacted with blade-carrying heat conductive rod, is provided thermal source for waste liquid concentration, is then gone out by inspissator flue gas
Mouth 23 is discharged, and is entered by scrubbing tower import flue gas four-way control valve 8 inside new spray scrubber 11；
The tail gas of 1.2 three parts collect after by scrubbing tower smoke inlet 20 enter new spray scrubber 11, through aperture cloth
The even action of gas plate 12 is entered inside impinging stream reaction area 24.There are four opposed nozzles 13 in impinging stream reaction area 24, take off
Sulphur denitration reagent carries out haptoreaction after opposed nozzle 13 sprays and hit with flue gas；Aperture air distribution plate 12 collects percussion flow simultaneously
The desulphurization denitration reagent of loss, forms liquid layer, the desulfurization of tower wall takes off in the upper and lower surface of aperture air distribution plate 12 beyond reaction zone 24
Nitre reagent is flowed down after the collection of aperture air distribution plate 12 by aperture edge, forms vertical spray.
Described step 2 is：Seawater is matched somebody with somebody as the solvent of desulfuration reagent by sea water supply pump 2 through sea water supply control valve 18
Deliver in sodium peroxydisulfate sea water solution blender 3, and mixed with the sodium peroxydisulfate that sodium peroxydisulfate storage box 17 provides, formed
Certain density sodium peroxydisulfate sea water solution, a large amount of chlorions and carbanion in seawater utilize fume afterheat to carry out over cure
The activation strengthening process of sour sodium, make to produce substantial amounts of oxidative free radical in sodium peroxydisulfate sea water solution.
Described step 3 is：Mixed sodium peroxydisulfate sea water solution enter in desulphurization denitration reagent mixer 6 with urine
The urea that plain storage tank 5 provides is mixed, and forms final desulphurization denitration reagent.
Described step 4 is：Desulphurization denitration reagent delivers to new spray washing by the road by desulphurization denitration reagent supply pump 7
Each opposed nozzle of layer in tower 11, carry out fully contacting mixing with flue gas.
Described step 5 is：Flue gas after processing directly empties by the new top exhanst gas outlet of spray scrubber 11, its
Remaining waste is discharged by new spray scrubber lower part outlet, is entered in waste trap 15, and greasy dirt and solid impurity material are then
Enter in greasy dirt and impurity storage box 14, waste liquid then enters the bottom of waste liquid inspissator 9 from inspissator waste liquid entrance 22, utilizes
Fume afterheat is concentrated.
Described air distribution plate upper strata nozzle 26 is alternately arranged with air distribution plate underlying nozzle 27, Plane Angle angle alternating at 45 °
Arrangement；The adjacent opposed angle of nozzle 13 of same layer is 90 °.
There is temperature controller 16 in described sodium peroxydisulfate sea water solution blender 3, when sodium peroxydisulfate sea water solution mixes
When temperature is too high in device 3, temperature controller 16 can close flue gas supply control valve 19, and isolation flue gas goes successively to sodium peroxydisulfate sea
Inside shell and tube flue 25 in water-soluble liquid mixer 3, keep sea water supply control valve 18 to open and continue to provide seawater；Work as temperature
When relatively low, temperature controller 16 will close sea water supply control valve 18, open flue gas supply control valve 19, flue gas is entered tubulation
Continue to provide heat in formula flue 25.
Described reaction equation is as follows；
S2O8 2-→2SO4 2-；
2SO4 2-+H2O→HSO4 -+OH-；
OH-+NO→H++NO2 -；
OH-+Cl-→ClOH2-；
ClOH2-+NO→HNO2+Cl-；
S2O8 2-+2H2O+2NO→2HNO2+2HSO4 -；
2HNO2+CO(NH2)2→2N2+CO2+3H2O；
S2O8 2-+H2O+SO2→2HSO4 -+H2SO4；
S2O8 2-+H2O→2HSO4 -+1/2O2；
SO2+CO(NH2)2+2H2O+1/2O2→(NH4)2SO4+CO2。
Compared with prior art, beneficial effect is the present invention：
The present invention is handled the tail gas of boat diesel engine 1 using new spray scrubber 11：Flue gas is by new spray
The lower wash tower flue gas entrance 20 of scrubbing tower 11 enters the inside of new spray scrubber 11, makees through aperture air distribution plate 12
Inside evenly into impinging stream reaction area 24.There are four opposed nozzles 13, desulphurization denitration in impinging stream reaction area 24
Reagent forms strong disturbance after opposed nozzle 13 sprays and hit in impinging stream reaction area 24, and four opposed nozzles 13 are opposed
Arrangement can caused by traditional two arrangement of nozzles of the average wave amplitude ratio of velocity gradient and pressure it is bigger, shearing force field is stronger, and pulsation is more
Strongly, it is more beneficial for the turbulence mixing in impinging stream reaction area 24.
It is angled between the opposed nozzle 13 of adjacent layer in the new spray scrubber 11 of the present invention to be alternately arranged,
Because the difference of the opposed nozzle 13 of each adjacent layer is arranged, in every layer of impinging stream reaction area 24 the speed side of desulphurization denitration reagent droplet
To there is larger change, the flue gas entered in each impinging stream reaction area 24 produces stronger turbulence, increases desulphurization denitration reagent
The effect of drop and flue gas, residence time and reaction time of the flue gas in new spray scrubber 11 are improved, improve desulfurization and take off
Nitre efficiency.
Install aperture air distribution plate 12 between the opposed nozzle 13 of each layer of the present invention additional, make flue gas in impinging stream reaction area 24 more
Add uniformly, the desulphurization denitration reagent droplet in impinging stream reaction area 24 can uniformly contact with the flue gas of rising, after injection is hit
Desulphurization denitration reagent droplet can more thoroughly complete the homogeneous perturbation of flue gas, increase gas liquid interfacial area, improve desulfurization and take off
Nitre efficiency.
The aperture air distribution plate 12 of the present invention can also collect the drop of loss beyond the interface of impinging stream reaction area 24, in aperture
12 upper and lower surface of air distribution plate forms liquid layer, the drop of tower wall is flowed down after the collection of aperture air distribution plate 12 by aperture edge, is formed
Vertical spray, make the flue gas of rising continue to act on reaction reagent, add the utilization ratio of reagent treatment, increase place
Manage effect.
The present invention uses solvent of the seawater as desulfuration reagent, and numerous studies show the ability that natural sea-water has desulfurization,
Reduce a large amount of embarrassed shapes for using the limited fresh water of ship in conventional wet washing, reduce fresh water input, reduce cost, seawater
In contain a large amount of chlorions and carbanion, can effectively activate sodium peroxydisulfate, produce strong oxidizing property free radical, add
The oxidability of sodium peroxydisulfate, improve the efficiency of desulphurization denitration.
The present invention not only effectively make use of fume afterheat, simultaneously using waste heat from tail gas activation sodium peroxydisulfate sea water solution
The activation degree of seawater sodium peroxydisulfate solution is improved, adds free-radical contents, improves oxidability, desulfurization is improved and takes off
Nitre efficiency；Shell and tube flue 25 in sodium peroxydisulfate sea water solution blender 3, the area of dissipation of waste heat from tail gas is added, reduced
Action time, improve the utilization rate of waste heat from tail gas.
Present invention increase temperature controller 16, is effectively controlled the activation temperature of seawater sodium peroxydisulfate, avoid due to
The too high free radical for causing sodium peroxydisulfate sea water solution of temperature loses.
The concentration that the present invention is disposed waste liquid using tail gas residual temperature.The upper strata heat conducting pipe of waste liquid inspissator 9 carries leaf
Piece, the contact area with tail gas is added, improve the absorption efficiency of heat energy, tail gas residual temperature is fully utilized.
The mode that the present invention is combined using oxidizing process and reducing process is by the NO gases in NOx gases finally with N2Form
Remove, O can be discharged in oxidizing process2, this has certain oxidation for the sulphite in solution, it is possible to reduce after
The waste liquid aerator of phase, reduces the input of equipment and the floor space of single unit system.
Reagent used in the present invention is reagent cheap and easy to get, is effectively improving denitrification efficiency simultaneously, is reduced
The cost of desulphurization denitration.
Brief description of the drawings
Fig. 1 is the schematic device of the present invention.
Fig. 2 is the schematic device ground dotted-line ellipse partial top diagrammatic cross-section of the present invention.
Fig. 3 is the schematic diagram of aperture air distribution plate 12 of the present invention.
Embodiment
The present invention is described in more detail below in conjunction with the accompanying drawings：
Fig. 1 is the schematic flow sheet of the present invention.Tail gas caused by boat diesel engine 1 flows through the reduction of fractions to a common denominator of flue gas four by pipeline
Flow control valve 4, part of smoke flow through the tubulation that flue gas supply control valve 19 is entered in sodium peroxydisulfate sea water solution blender 3
Inside formula flue 25, there is provided for the heat energy of activation, then discharged by shell and tube flue 25.Tail gas passes through scrubbing tower import flue gas
Four-way control valve 8 is entered inside new spray scrubber 11.Another part flue gas then passes through scrubbing tower import flue gas four-way control
Valve 8 processed is entered inside new spray scrubber 11 by scrubbing tower gas approach 20.Part III flue gas is entered by inspissator flue gas
Mouth 21 enters the top of waste liquid inspissator 9, is contacted with blade-carrying heat conductive rod, there is provided concentration heat.Then by inspissator cigarette
The discharge of gas outlet 23, is entered inside new spray scrubber 11 by scrubbing tower import flue gas four-way control valve 8.Three parts
Tail gas collect after by scrubbing tower smoke inlet 20 enter new spray scrubber 11, enter and hit after the gas distribution of aperture air distribution plate 12
Hit in stream reaction zone 24 and handled.
Sea water solvent is distributed to sodium peroxydisulfate sea water solution blender 3 by sea water supply pump 2 through sea water supply control valve 18
In, and mixed with the sodium peroxydisulfate that sodium peroxydisulfate storage box 17 provides.Temperature in sodium peroxydisulfate sea water solution blender 3
Monitored by temperature controller 16, when temperature is too high in blender, temperature controller 16 can close flue gas supply control valve 19, every
Exhausted flue gas is gone successively to inside the shell and tube flue 25 in blender, and is kept sea water supply control valve 18 to open and continued to provide sea
The aqueous solution.Conversely, when the temperature is low, temperature controller 16 will close sea water supply control valve 18, flue gas supply control is opened
Valve 19, flue gas is entered in shell and tube flue 25 and continue to provide heat.Mixed sodium peroxydisulfate sea water solution enters desulfurization
The urea provided in denitration reagent mixer 6 with urea storage tank 5 is mixed, and forms final desulphurization denitration reagent.
Then, reagent delivers to each layer nozzle in new spray scrubber 11 by the road by desulphurization denitration reagent supply pump 7, right
Tail gas carries out desulphurization denitration processing.Flue gas after processing directly empties by the new top exhanst gas outlet of spray scrubber 11, its
Remaining waste is exited into waste trap 15 by the new lower part outlet of spray scrubber 11, and greasy dirt and solid impurity material are then
Enter in greasy dirt and impurity storage box 14, waste liquid then enters the bottom of waste liquid inspissator 9 from inspissator waste liquid entrance 22, utilizes
Fume afterheat is concentrated, and the material after concentration is fed directly to for sale in enriched product storage box 10.
Fig. 2 is Fig. 1 dotted-line ellipse partial top diagrammatic cross-sections.Air distribution plate upper strata nozzle 26 and air distribution plate lower floor in Fig. 2
Nozzle 27 is alternately arranged, and aperture air distribution plate is alternately arranged at two layers of the opposed Plane Angle of nozzle 13 angle at 45 ° about 12, same layer
The adjacent angle of opposed nozzle 13 is 90 °.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright principle, it should be understood that the protection domain of invention is not limited to such especially statement and embodiment.It is every according to upper
State description and make various possible equivalent substitutions or change, be all considered to the scope of the claims for belonging to the present invention.
Claims (9)
1. a kind of new spray column removes ship tail gas NOx and SO simultaneously2Device and method, including boat diesel engine (1), sea
It is water supply pump (2), sodium peroxydisulfate sea water solution blender (3), flue gas four-way shunting valve (4), urea storage tank (5), de-
Sulphur denitration reagent mixer (6), desulphurization denitration reagent supply pump (7), scrubbing tower import flue gas four-way control valve (8), waste liquid are dense
Contracting device (9), enriched product storage box (10), new spray scrubber (11), aperture air distribution plate (12), opposed nozzle (13), oil
Dirty and impurity storage box (14), waste trap (15), temperature controller (16), sodium peroxydisulfate storage box (17), sea water supply
Control valve (18), flue gas supply control valve (19), scrubbing tower smoke inlet (20), inspissator smoke inlet (21), inspissator give up
Liquid entrance (22), inspissator exhanst gas outlet (23), impinging stream reaction area (24), shell and tube flue (25), air distribution plate upper strata nozzle
(26), air distribution plate underlying nozzle (27), it is characterised in that：A kind of described new spray column remove simultaneously ship tail gas NOx and
SO2Method be using seawater as solvent, activator and desulfurization absorbent, reduced using sodium peroxydisulfate advanced oxidation processes and urea
The technology that method is combined is by the NO gases in NOx gases finally with N2Form remove, realize to ship tail gas desulphurization denitration one
The processing of body, reaction reagent activation and the concentrated extract of waste liquid are carried out using fume afterheat；Comprise the following steps that：
(1) tail gas is divided into three parts and enters processing system；
(2) sodium peroxydisulfate sea water solution is configured；
(3) desulphurization denitration reagent is configured；
(4) flue gas is handled；
(5) waste is handled.
2. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described step (1) is specific as follows：
(1.1) flue gas flows through flue gas four-way shunting valve (4), Part I by pipeline caused by boat diesel engine (1)
Flue gas is flowed through in the shell and tube flue (25) that flue gas supply control valve (19) is entered in sodium peroxydisulfate sea water solution blender (3)
Portion, there is provided strengthen the heat energy of activation for sodium peroxydisulfate, then discharged by shell and tube flue (25), by scrubbing tower import flue gas
It is internal that four-way control valve (8) enters new spray scrubber (11)；Part II flue gas then passes through scrubbing tower import flue gas four
Logical control valve (8) enters new spray scrubber (11) inside by scrubbing tower smoke inlet (20)；Part III flue gas is by dense
Contracting device smoke inlet (21) enters waste liquid inspissator (9) top, is contacted with blade-carrying heat conductive rod, is provided for waste liquid concentration
Thermal source, then discharged by inspissator exhanst gas outlet (23), novel spraying is entered by scrubbing tower import flue gas four-way control valve (8)
It is internal to drench scrubbing tower (11)；
(1.2) new spray scrubber (11) is entered by scrubbing tower smoke inlet (20) after the tail gas of three parts collects, through aperture
It is internal that air distribution plate (12) even action enters impinging stream reaction area (24).There are four opposed sprays in impinging stream reaction area (24)
Mouth (13), desulphurization denitration reagent carry out haptoreaction after opposed nozzle (13) sprays and hit with flue gas；Aperture air distribution plate (12)
The desulphurization denitration reagent of loss beyond impinging stream reaction area (24) is collected simultaneously, is formed in aperture air distribution plate (12) upper and lower surface
Liquid layer, the desulphurization denitration reagent of tower wall are flowed down after aperture air distribution plate (12) collection by aperture edge, form vertical spray.
3. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described step (2) is：Seawater is controlled as the solvent of desulfuration reagent by sea water supply pump (2) through sea water supply
Valve (18) is distributed in sodium peroxydisulfate sea water solution blender (3), and the sodium peroxydisulfate provided with sodium peroxydisulfate storage box (17)
Mixed, form certain density sodium peroxydisulfate sea water solution, a large amount of chlorions and carbanion in seawater utilize cigarette
Gas waste heat carries out the activation strengthening process of sodium peroxydisulfate, makes to produce substantial amounts of oxidative free radical in sodium peroxydisulfate sea water solution.
4. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described step (3) is：Mixed sodium peroxydisulfate sea water solution enters desulphurization denitration reagent mixer (6)
In with urea storage tank (5) provide urea mixed, form final desulphurization denitration reagent.
5. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described step (4) is：Desulphurization denitration reagent delivers to novel spraying by the road by desulphurization denitration reagent supply pump (7)
Each opposed nozzle of layer in scrubbing tower (11) is drenched, carries out fully contacting mixing with flue gas.
6. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described step (5) is：Flue gas after processing is directly arranged by new spray scrubber (11) top exhanst gas outlet
Sky, remaining waste are discharged by new spray scrubber lower part outlet, are entered in waste trap (15), greasy dirt and solid impurity
Material is then entered in greasy dirt and impurity storage box (14), and waste liquid then enters waste liquid inspissator from inspissator waste liquid entrance (22)
(9) bottom, concentrated using fume afterheat.
7. a kind of new spray column according to claim 2 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described air distribution plate upper strata nozzle (26) is alternately arranged with air distribution plate underlying nozzle (27), Plane Angle angle at 45 °
It is alternately arranged；Adjacent opposed nozzle (13) angle of same layer is 90 °.
8. a kind of new spray column according to claim 3 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：There is temperature controller (16) in described sodium peroxydisulfate sea water solution blender (3), when sodium peroxydisulfate sea water solution
When blender (3) interior temperature is too high, temperature controller (16) can close flue gas supply control valve (19), and isolation flue gas is gone successively to
Shell and tube flue (25) in sodium peroxydisulfate sea water solution blender (3) is internal, keep sea water supply control valve (18) open after
It is continuous that seawater is provided；When the temperature is low, temperature controller (16) will close sea water supply control valve (18), open flue gas supply control
Valve (19) processed, flue gas is entered in shell and tube flue (25) and continue to provide heat.
9. a kind of new spray column according to claim 1 removes ship tail gas NOx and SO simultaneously2Device and method, its
It is characterised by：Described reaction equation is as follows；
S2O8 2-→2SO4 2-；
2SO4 2-+H2O→HSO4 -+OH-；
OH-+NO→H++NO2 -；
OH-+Cl-→ClOH2-；
ClOH2-+NO→HNO2+Cl-；
S2O8 2-+2H2O+2NO→2HNO2+2HSO4 -；
2HNO2+CO(NH2)2→2N2+CO2+3H2O；
S2O8 2-+H2O+SO2→2HSO4 -+H2SO4；
S2O8 2-+H2O→2HSO4 -+1/2O2；
SO2+CO(NH2)2+2H2O+1/2O2→(NH4)2SO4+CO2。
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| CN108939756A (en) * | 2018-06-01 | 2018-12-07 | 东南大学 | Ship tail gas desulphurization system |
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