CN103007694B - Seawater desulfurization device for tail gas of marine diesel engine - Google Patents
Seawater desulfurization device for tail gas of marine diesel engine Download PDFInfo
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- CN103007694B CN103007694B CN201210577151.4A CN201210577151A CN103007694B CN 103007694 B CN103007694 B CN 103007694B CN 201210577151 A CN201210577151 A CN 201210577151A CN 103007694 B CN103007694 B CN 103007694B
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Abstract
The invention relates to a seawater desulfurization device for tail gas of a marine diesel engine. The seawater desulfurization device comprises a shell, an air flow inlet flange, a tail liquid collecting tank, a tail liquid separator, a uniform air flow distributor, a turbulent flow ball layer, a parallel independent straight-pipe cross flow spraying device, a dehumidification device and an air flow outlet flange, wherein the air flow inlet flange is mounted at the bottom of the shell; the tail liquid collecting tank is mounted inside the shell and is located above the air flow inlet flange; the tail liquid separator is mounted inside the shell and is located above the tail liquid collecting tank; the uniform air flow distributor is mounted inside the shell and is located above the tail liquid separator; the turbulent flow ball layer is mounted inside the shell and is located above the uniform air flow distributor; the parallel independent straight-pipe cross flow spraying device is mounted inside the shell and is located above the turbulent flow ball layer; the dehumidification device is mounted in the shell and is located above the parallel independent straight-pipe cross flow spraying device; and the air flow outlet flange is mounted above the dehumidification device and is located at the top of the shell. According to the seawater desulfurization device, independent straight-pipe-type optimization is carried out on a spraying manner, the height, pressure loss and gas-liquid ratio of the desulfurization device are reduced on the premise of not increasing equipment and operation, and the desulfurization efficiency is effectively improved.
Description
Technical field
The present invention relates to a kind of marine diesel tail gas sea water desulfuration method and device, refer in particular to the independent straight tube cross-current type of a kind of parallel connection spray-turbulence sphere marine diesel tail gas sea water desulfuration method and device, to realize the removal to marine diesel tail gas sulphur oxide.
Background technology
In bunker oil, contain 0.1%～7% sulphur, because sulfur content is lower, diesel engine sulfureous in flue gas oxide concentration is very low; But common ship's navigation distance, fuel consumption total amount is large, so the total amount of boats and ships discharge oxysulfide is huge.For preventing that vessel motion from causing the pollution of sulfur oxides emissions to atmosphere, International Maritime Organization (IMO) has formulated MARPOL pact supplemental provisions VI (prevent boats and ships from causing atmosphere pollution rule), has wherein stipulated that boats and ships must take measures the total release of oxysulfide to be reduced to 6.0g/ (kwh) or following.If marine diesel tail gas sulfur oxides emissions exceeds standard, its navigation will be subject to MARPOL73/78 pact limit value, cause huge economic loss.For reducing the discharge of vessel motion process sulphur oxide, meet the requirement of pact increasingly stringent, marine diesel tail gas is carried out to desulfurization imperative.
In prior art, it is to ensure sulfur oxides emissions Main Means up to standard that tail gas desulfurizer is installed on boats and ships.Seawater desulfurizing process mainly utilizes the alkalescence of seawater oxysulfide to be absorbed fixing, have and build and operating cost is relatively low, do not produce solid waste and mud, desulfurizing tower is difficult for the advantages such as obstruction fouling, the pressure loss be less, stable, technical characterstic meets the basic demand of desulfurizer peculiar to vessel.
The required capital equipment of sea water desulfuration is absorption tower, current Absorption by Sea Water tower peculiar to vessel adopts spray column and the fixing packed tower structure of filler more, adopt the gas-liquid contact mode of two phase countercurrent flow, the current multinomial patent of this point is all on the books, the seawater desulfurization device > > that comprises No. 201110177073.4 < < marine tail exhaust-gas treatment system of patent of invention, No. 200810048002.2 < < desulfurizing exhaust gas of seagoing vessel method of patent of invention and device > >, and No. 200710012371.1 < < of patent of invention carries out the device and method > > of seawer washing processing to ship tail gas.Because gas-liquid mass transfer speed in the absorption tower of spray column structure is low, seawater easily occurs that wall stream causes that gas-liquid contact is insufficient and loss desulfuration efficiency needs gas, liquid two-phase in desulfurizer, to stop the long period, thereby the huge difficult shipment of tower height; When fixedly the packed tower of filler moves in addition, the pressure loss is large, and operation energy consumption is high, the same wall flow phenomenon that easily occurs.This two classes desulfurizer liquid-gas ratio is all larger, and when obtaining 95% desulfuration efficiency, board-like spray column liquid-gas ratio is 10L/m
3, packed tower liquid-gas ratio is 5.55L/m
3.The drawbacks limit such as in sum, desulfurizing tower height is excessive, the pressure loss is large, liquid-gas ratio is large the application of seawater desulfurization device in the desulfurization of marine diesel tail gas.
The common practice that overcomes above-mentioned defect is that the seawater as sulfur oxide absorbent is carried out to upgrading, this technical scheme also has multinomial patent to record at present, comprise the electrolysis sea water desulfuration method and apparatus > > that patent of invention CN201210211165.4 < < processes for combustion tail gas peculiar to vessel, with patent of invention CN201110039565.7 < < magnesium base-seawater method desulfurization system for ship > >.But seawater needs to use extra equipment or alkalinity additive in the process of upgrading, operation relative complex.
Summary of the invention
The object of this invention is to provide a kind of marine diesel tail gas seawater desulfurization device, spray mode is carried out to independent straight pipe type optimization, can under the prerequisite that does not increase equipment and operation, reduce desulfurizer height, the pressure loss and gas liquid ratio, effectively improve desulfuration efficiency.
For achieving the above object, the invention provides a kind of marine diesel tail gas seawater desulfurization device, it comprises shell, be arranged on the air flow inlet flange of outer casing bottom, be arranged on enclosure and be positioned at the tail washings feeder of air flow inlet flange top, be arranged on enclosure and be positioned at the tail washings separator of tail washings feeder top, be arranged on enclosure and be positioned at the air-flow even distributor of tail washings separator top, be arranged on enclosure and be positioned at the turbulence sphere layer of air-flow even distributor top, be arranged on enclosure and be positioned at the independent straight tube cross-current type of the parallel connection spray equipment of turbulence sphere layer top, be arranged on enclosure and be positioned at the dehydrating unit of independent straight tube cross-current type spray equipment in parallel top, and be arranged on dehydrating unit top and be positioned at the air stream outlet flange of cover top portion.
Described air flow inlet flange is connected with boats and ships blast pipe flange respectively with air stream outlet flange, and seawater desulfurization device is accessed in boats and ships blast pipe.
Described tail washings separator adopts spiral-flow type tail washings separator, is fixedly mounted on the inwall of shell by support.
The bottom of described turbulence sphere layer is provided with Under The Grille, and this Under The Grille is between air-flow even distributor and turbulence sphere layer; The top of described turbulence sphere layer is provided with grid, and on this, grid is between turbulence sphere layer and independent straight tube cross-current type spray equipment in parallel.
The independent straight tube cross-current type of described parallel connection spray equipment comprises: the independent straight tube of some parallel connections radially vertically arranges respectively, and is uniformly distributed in the radial section of this seawater desulfurization device in the shell of seawater desulfurization device; Some seawater pipes, spaced apart up and down, every seawater pipe is vertically introduced seawater desulfurization device inside and vertically through each independent straight tube, introduces each independent straight tube respectively inner through shell; Some shower nozzles, it is arranged on respectively on every seawater pipe of each independent straight tube inside, forms some grades of spray equipments.
At every seawater pipe, be positioned on one end of housing exterior seawater pipe flange is installed, it is connected with sea water supply system.
Described shower nozzle is installed downwards perpendicular to seawater pipe, and is positioned at the place, the cross section center of circle of each independent straight tube; The angular range of the spray angle α of described shower nozzle is 15 °～180 °, and the seawater being sprayed by this shower nozzle is at the inner seawater water curtain that forms conulite or solid conical of independent straight tube.
Described dehydrating unit comprises some spiral-flow type dehumidifiers, is arranged on respectively in each independent straight tube, and is positioned at the top of top seawater pipe.
In each independent straight tube, can, between the upper and lower every several spiral-flow type dehumidifiers are set, form some grades of dehydrating units.
Described tail washings feeder is around the also inwall setting of covering shell; On the shell of described tail washings feeder bottom, be provided with tail washings outlet, in one end of this tail washings outlet, be provided with tail washings and discharge flange, for external desulfurization tail washings receiving equipment; Between described tail washings outlet and tail washings discharge flange, be also provided with valve.
Marine diesel tail gas seawater desulfurization device provided by the present invention, carries out independent straight pipe type optimization to spray mode, can under the prerequisite that does not increase equipment and operation, reduce desulfurizer height, the pressure loss and gas liquid ratio, effectively improves desulfuration efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the marine diesel tail gas seawater desulfurization device in the present invention;
Fig. 2 is the schematic layout pattern of the independent straight tube of parallel connection in the present invention.
The specific embodiment
Below in conjunction with Fig. 1 and Fig. 2, describe a preferred embodiment of the present invention in detail.
As shown in Figure 1, be the structural representation of marine diesel tail gas seawater desulfurization device provided by the present invention.This seawater desulfurization device comprises shell 18, be arranged on the air flow inlet flange 1 of shell 18 bottoms, be arranged on shell 18 inner and be positioned at the tail washings feeder 2 of air flow inlet flange 1 top, be arranged on shell 18 inner and be positioned at the tail washings separator 6 of tail washings feeder 2 tops, be arranged on shell 18 inner and be positioned at the air-flow even distributor 8 of tail washings separator 6 tops, be arranged on shell 18 inner and be positioned at the turbulence sphere layer 10 of air-flow even distributor 8 tops, be arranged on shell 18 inner and be positioned at the independent straight tube cross-current type of the parallel connection spray equipment of turbulence sphere layer 10 top, be arranged on shell 18 inner and be positioned at the dehydrating unit of independent straight tube cross-current type spray equipment in parallel top, and be arranged on dehydrating unit top and be positioned at the air stream outlet flange 17 at shell 18 tops.
Described air flow inlet flange 1 is connected with boats and ships blast pipe flange respectively with air stream outlet flange 17, and seawater desulfurization device is accessed in boats and ships blast pipe.
Described tail washings separator 6 adopts spiral-flow type tail washings separator, is fixedly mounted on the inwall of shell 18 by support 7.
The bottom of described turbulence sphere layer 10 is provided with Under The Grille 9, and this Under The Grille 9 is between air-flow even distributor 8 and turbulence sphere layer 10; The top of described turbulence sphere layer 10 is provided with grid 11, and on this, grid 11 is between turbulence sphere layer 10 and independent straight tube cross-current type spray equipment in parallel.
The independent straight tube 12 that the independent straight tube cross-current type of described parallel connection spray equipment comprises some parallel connections, as shown in Figure 2, some described independent straight tubes 12 radially vertically arrange in the shell 18 of seawater desulfurization device, and are uniformly distributed in the radial section of this seawater desulfurization device.
The independent straight tube cross-current type of described parallel connection spray equipment also comprises some seawater pipes 14, spaced apart up and down, every seawater pipe 14 is vertical inner and vertical through each independent straight tube 12 each independent straight tube 12 inside of introducing respectively through shell 18 introducing seawater desulfurization devices; At every seawater pipe 14, be positioned on one end of shell 18 outsides seawater pipe flange 15 is installed, it is connected with sea water supply system.
The independent straight tube cross-current type of described parallel connection spray equipment also comprises some shower nozzles 13, and it is arranged on respectively on every seawater pipe 14 of each independent straight tube 12 inside, thereby forms one or more levels spray equipment; This shower nozzle 13 is installed downwards perpendicular to seawater pipe 14, and is positioned at the place, the cross section center of circle of each independent straight tube 12; The angular range of the spray angle α of described shower nozzle 13 is 15 °～180 °, and the seawater being sprayed by this shower nozzle 13 is at the inner seawater water curtain 19 that forms conulite or solid conical of independent straight tube 12.
Described dehydrating unit comprises some spiral-flow type dehumidifiers 16, is arranged on respectively in each independent straight tube 12, and is positioned at the top of top seawater pipe 14.Further, can be between the upper and lower every a plurality of spiral-flow type dehumidifiers 16 are set in each independent straight tube 12, thus form multistage dehydrating unit.
Described tail washings feeder 2 is around the also inwall setting of covering shell 18; On the shell 18 of described tail washings feeder 2 bottoms, be provided with tail washings outlet 3, in one end of this tail washings outlet 3, be provided with tail washings and discharge flange 5, for external desulfurization tail washings receiving equipment, between described tail washings outlet 3 and tail washings discharge flange 5, be also provided with valve 4.
Marine diesel tail gas seawater desulfurization device provided by the present invention, its concrete sweetening process and method are as described below.First, air flow inlet flange 1 and air stream outlet flange 17 are docked fixing with boats and ships blast pipe companion flange, make in marine diesel tail gas seawater desulfurization device access boats and ships blast pipe, marine diesel tail gas enters seawater desulfurization device inside by airflow direction shown in Fig. 1 by air flow inlet flange 1 place.First marine diesel tail gas passes through spiral-flow type tail washings separator 6, drives 6 rotations of spiral-flow type tail washings separator; And further pass through air-flow even distributor 8, make to be about to enter marine diesel tail gas air-flow being radially uniformly distributed along seawater desulfurization device of turbulence sphere layer 10.Subsequently, when marine diesel tail gas air-flow enters turbulence sphere layer 10, blow turbulence sphere and carry out turbulent motion between upper grid 9 and Under The Grille 11, on turbulence sphere surface, mass-transfer progress occurs.Then, marine diesel tail gas air-flow enters respectively each independent straight tube 12, due to the external sea water supply system of seawater pipe flange 15, seawater enters shower nozzle 13 through seawater pipe 14, and spray and form seawater water curtain 19 to independent straight tube 12 inwalls by shower nozzle 13, thereby make seawater and the marine diesel tail gas air-flow generation mass-transfer progress that passes seawater water curtain 19, remove the oxysulfide in marine diesel tail gas air-flow.Finally, air-flow carries out dehumidification treatments through spiral-flow type dehumidifier 16, removes the steam in air-flow after desulfurization, and is discharged and entered in boats and ships blast pipe by air stream outlet flange 17.
In said process, sea water drops most of and marine diesel tail gas air-flow generation gas-liquid mass transfer moves downward or forms to lower wall and flow and enter turbulence sphere layer 10 at each independent straight tube 12 inwalls under Action of Gravity Field, at the marine diesel tail gas air-flow generation mass-transfer progress of turbulence sphere surface and follow-up inflow.And fraction sea water drops is entrained in spiral-flow type dehumidifier 16 by air-flow in addition, and it is separated to be dehumidified from air-flow by spiral-flow type dehumidifier 16, thereby forms and flow and enter the air-flow generation gas-liquid mass transfer of turbulence sphere layer and follow-up inflow to lower wall at each independent straight tube 12 inwalls.Finally, whole sea water drops forms desulfurization tail washings after turbulence sphere layer 10 downwards, separated from the marine diesel tail gas air-flow of follow-up inflow when desulfurization tail washings continues to move downward through tail washings separator 6, thus and form to lower wall stream and enter tail washings feeder 2 at shell 18 inwalls.When the desulfurization tail washings liquid level of tail washings feeder 2 interior collections lower than tail washings outlet 3 on along time, valve 4 keeps closing, and prevents that the marine diesel tail gas air-flow of not yet processing through desulfurization of follow-up inflow from spilling from tail washings outlet 3; And when the liquid level of the desulfurization tail washings of tail washings feeder 2 interior collections higher than tail washings outlet 3 on along time, Open valve 4, desulfurization tail washings is expelled to by tail washings and discharges the external desulfurization tail washings receiving equipment of flange 5 from tail washings outlet 3.
In sum, marine diesel tail gas seawater desulfurization device provided by the present invention, compared with prior art, has the following advantages and beneficial effect.
1, in the independent straight tube cross-current type of parallel connection spray equipment, tail gas air-flow and seawater cross-flow campaign, improve gas-liquid mass transfer speed, overcome the negative effect of wall stream to desulfuration efficiency, reduces absorption tower tower height, reduces the pressure loss.
2, in the independent straight tube cross-current type of parallel connection spray equipment, adopt independent straight tube structure, reduce the inhomogeneities that gas-liquid distributes, increase gas-liquid contact probability, improve desulfuration efficiency.
3, tail gas air-flow is in running, and turbulence sphere layer keeps turbulence state, reduces the pressure loss, increases gas-liquid contact probability and time of contact and improved absorption efficiency.
4, dehumidifier and tail washings separator all adopt spiral-flow type, reduce the pressure loss, make desulfurization tail washings all form wall stream.
5, be provided with in addition tail washings feeder 2, effectively collect the desulfurization tail washings that forms wall stream, simple in structure not fragile; And valve is set to avoid undressed tail gas air-flow to spill from tail washings outlet.
Therefore, marine diesel tail gas seawater desulfurization device provided by the present invention, desulfuration efficiency is not less than 90%, and device overall height is not higher than 2m, and the pressure loss is not higher than 300mmHg, and liquid-gas ratio is not higher than 4L/m
3.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a marine diesel tail gas seawater desulfurization device, is characterized in that, comprises:
Shell (18);
Be arranged on the air flow inlet flange (1) of shell (18) bottom;
Be arranged on shell (18) inner and be positioned at the tail washings feeder (2) of air flow inlet flange (1) top
Be arranged on shell (18) inner and be positioned at the tail washings separator (6) of tail washings feeder (2) top;
Be arranged on shell (18) inner and be positioned at the air-flow even distributor (8) of tail washings separator (6) top;
Be arranged on shell (18) inner and be positioned at the turbulence sphere layer (10) of air-flow even distributor (8) top;
Be arranged on shell (18) inner and be positioned at the independent straight tube cross-current type of the parallel connection spray equipment of turbulence sphere layer (10) top;
Be arranged on shell (18) inner and be positioned at the dehydrating unit of independent straight tube cross-current type spray equipment in parallel top; And
Be arranged on dehydrating unit top and be positioned at the air stream outlet flange (17) at shell (18) top;
Wherein, described tail washings separator (6) adopts spiral-flow type tail washings separator, by support (7), is fixedly mounted on the inwall of shell (18);
The bottom of described turbulence sphere layer (10) is provided with Under The Grille (9), and this Under The Grille (9) is positioned between air-flow even distributor (8) and turbulence sphere layer (10); The top of described turbulence sphere layer (10) is provided with grid (11), and grid on this (11) is positioned between turbulence sphere layer (10) and independent straight tube cross-current type spray equipment in parallel.
2. marine diesel tail gas seawater desulfurization device as claimed in claim 1, is characterized in that, described air flow inlet flange (1) is connected with boats and ships blast pipe flange respectively with air stream outlet flange (17), and seawater desulfurization device is accessed in boats and ships blast pipe.
3. marine diesel tail gas seawater desulfurization device as claimed in claim 1, is characterized in that, the independent straight tube cross-current type of described parallel connection spray equipment comprises:
The independent straight tube (12) of some parallel connections radially vertically arranges respectively, and is uniformly distributed in the radial section of this seawater desulfurization device in the shell (18) of seawater desulfurization device;
Some seawater pipes (14), spaced apart up and down, every seawater pipe (14) is vertically introduced seawater desulfurization device inside and vertically through each independent straight tube (12), introduces each independent straight tube (12) inside respectively through shell (18);
Some shower nozzles (13), it is upper that it is arranged on respectively the inner every seawater pipe (14) of each independent straight tube (12), forms some grades of spray equipments.
4. marine diesel tail gas seawater desulfurization device as claimed in claim 3, is characterized in that, at every seawater pipe (14), is positioned on the outside one end of shell (18) seawater pipe flange (15) is installed, and it is connected with sea water supply system.
5. marine diesel tail gas seawater desulfurization device as claimed in claim 3, is characterized in that, described shower nozzle (13) is installed downwards perpendicular to seawater pipe (14), and is positioned at the place, the cross section center of circle of each independent straight tube (12); The angular range of the spray angle of described shower nozzle (13) is 15 °～180 °, and the seawater being sprayed by this shower nozzle (13) is at the inner seawater water curtain (19) that forms conulite or solid conical of independent straight tube (12).
6. marine diesel tail gas seawater desulfurization device as claimed in claim 1, is characterized in that, described dehydrating unit comprises some spiral-flow type dehumidifiers (16), is arranged on respectively in each independent straight tube (12), and is positioned at the top of top seawater pipe (14).
7. marine diesel tail gas seawater desulfurization device as claimed in claim 6, is characterized in that, in each independent straight tube (12), can, between the upper and lower every several spiral-flow type dehumidifiers (16) are set, form some grades of dehydrating units.
8. marine diesel tail gas seawater desulfurization device as claimed in claim 1, is characterized in that, described tail washings feeder (2) is around the also inwall setting of covering shell (18);
On the shell (18) of described tail washings feeder (2) bottom, be provided with tail washings outlet (3), in one end of this tail washings outlet (3), be provided with tail washings and discharge flange (5), for external desulfurization tail washings receiving equipment;
Between described tail washings outlet (3) and tail washings discharge flange (5), be also provided with valve (4).
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| CN201210577151.4A CN103007694B (en) | 2012-12-27 | 2012-12-27 | Seawater desulfurization device for tail gas of marine diesel engine |
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| CN201210577151.4A CN103007694B (en) | 2012-12-27 | 2012-12-27 | Seawater desulfurization device for tail gas of marine diesel engine |
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Families Citing this family (6)
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| CN104703675A (en) * | 2013-04-17 | 2015-06-10 | 富士电机株式会社 | Exhaust gas treatment device, vessel, and exhaust gas treatment method |
| JP6775670B2 (en) * | 2017-03-24 | 2020-10-28 | 三菱造船株式会社 | Drainage system for marine desulfurization equipment |
| CN110252096A (en) * | 2019-07-04 | 2019-09-20 | 上海蓝魂环保科技有限公司 | A kind of ship tail gas high efficiency desulphurization plant and its application method |
| CN110665346A (en) * | 2019-10-24 | 2020-01-10 | 张浩博 | High-efficient sweetener of flue gas based on sea water |
| CN111036048A (en) * | 2019-12-24 | 2020-04-21 | 上海海事大学 | Novel ship exhaust gas washing desulfurization device |
| CN116020223A (en) * | 2023-01-06 | 2023-04-28 | 湖北远丰科技发展有限公司 | Kitchen garbage removes flavor and removes dust purifier |
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