A kind of engine of boat and ship flue gas desulphurization unit and methodTechnical field
The present invention relates to engine of boat and ship waste gas purification technology, specifically a kind of engine of boat and ship flue gas desulphurization unitAnd method.
Background technique
Ship uses miscellaneous oil inferior and to discharge the pernicious gases such as sulfur-containing oxide SO2 in flue gas at present, and SO2To atmosphereThe pollution of environment is the most serious.
For save the cost, Large ocean going vessels are all made of high sulfur content mink cell focus as fuel at present.According to statistics, combustion peculiar to vesselThe mean content of sulfur of oil 2.7% or so, a small number of ships up to 3.5%, even as high as 4.5%, so caused by SO2Big compression ringBorder pollution problem is increasingly serious.
Measure is mainly the following at present for sulfur content in control engine of boat and ship exhaust gas: 1, it is using sweet heavy oily,Shipping Company's operation cost can be made to increase using the fuel oil of low sulfur content, estimation fuel cost will increase 30% or more, in this way meetingReduce the competitiveness of Shipping in the industry.In the fuel oil using low sulfur content in addition to the expense of fuel oil is also needed to entire hairMotivation fuel system is transformed, because the parameters such as the physicochemical property of high-sulfur mink cell focus, flash-point, viscosity, specific gravity, calorific capacity are notWith, therefore two kinds of oil are different engine calls；2, use liquefied natural gas for fuel, there are engine fuel systemsTransformation difficulty and higher cost, natural gas storage problem on ship cause cruising ability weaker, the bases such as harbour aerating at presentFacility is not perfect；3, engine of boat and ship flue gas desulphurization unit is installed and used, although will increase the cost of investment of equipment component, butIt can want much lower to avoid change engine system compared to replacement sweet heavy oil operating cost, there is good economical, meshMost of preceding country's ship engine exhaust desulfurization emission abatement device is developing test phase, and with national emission regulation limit valueMore and more stringent, ship discharges SO2It controls extremely urgent, therefore is badly in need of a kind of engine of boat and ship exhuast gas desulfurization technology.
Application number: 200720038084.3 are related to rotational flow plate defroster.It includes blade, blind plate, cover cylinder and ring flat-plate, cover cylinderIt is connect with ring flat-plate, blind plate is placed in the center of cover cylinder, and several blades are evenly arranged in the annular space between blind plate and cover cylinder, two sidesSide is connect with blind plate and cover cylinder respectively.Its beneficial effect is, good greater than its defogging effect of 2 meters of absorption tower for tower diameter, to mentionHigh absorption tower desulfuration efficiency.
Application number: boat diesel engine tail gas desulfurization denitrification integrated device designed by 201810786982.X, its tailThe tail gas input terminal of gas cooler accesses diesel engine vent gas efferent duct, the cooling tail gas output end access low temperature of tail gas cooler etc.The exhaust gas oxidation area output end of plasma generator, low-temperature plasma generator accesses urea washes tower, urea washes towerWaste liquid output end accesses scrub raffinate container, the first output end connection scrub raffinate pump of scrub raffinate container, scrub raffinate pumpOutput end access tail gas cooler internal exchanger, internal exchanger output end access crystallization and separator, crystallization andSeparator output end accesses urea liquid container, and the second output terminal of scrub raffinate container accesses urea liquid container, ureaThe urea washes liquid output end of solution container accesses urea pump, and the output end of urea pump accesses urea washes tower.The present invention usesExhaust gas desulfurization denitrification integral system has many advantages, such as that low energy consumption, low in cost, product is recyclable, without secondary pollution.
Application number: 201710589328.5 provide a kind of ship tail gas combined desulfurization carbonization treatment device, including absorption tower,From bottom to top it is divided into desulfurization section, decarbonization section, demister inside it, the first membrane electrolytic cell carries out lower valency film to desulfurization section waste liquidElectrolysis, regenerates absorbing liquid；Second membrane electrolytic cell carries out the electrolysis of lower valency film to decarbonization section waste liquid, regenerates decarburization absorption liquid,And by-product pure CO2, SO2；Desulfuration recycle pump, by the absorbing liquid regenerated again blowback absorption tower；Charging spout, by the way that alkali is addedLiquid adjusts decarbonization section absorption liquid pH；Absorbing liquid is pumped into absorption tower by decarburization circulating pump；Fluid infusion pump, it is lower that desulfurization absorbs flow quantityWhen, fluid infusion is carried out to desulfurization absorbing liquid.The technologies such as the present invention is absorbed by double loop, film is electrolysed, can remove effectively in exhaust gasCO2, SO2, and high-purity co2, SO2 are prepared, absorbing liquid is Ke Xunhuanliyong, and it is easy to operate, effectively improve economic benefit and sectionIt can environmental protection.
Application number: 201810554492.7 disclose a kind of ship tail gas desulphurization system, including absorbing liquid feed unit andTail gas cleaning unit, tail gas cleaning unit include desulfuration absorbing tower, and the absorbing liquid entrance on absorption tower is separately connected alkali liquor pipe, seawaterThe alkali liquor pipe of pipe and/or connection mixing seawater；When ship is in emission control area, tail gas is discharged after lye desulfurization；WhenWhen ship is in non-emission control area, tail gas is discharged after the lye desulfurization of seawater or mixing seawater.The present invention uses seawaterThe method for adding base, effectively solves the problems, such as seawater regional difference, improves the stability of system；Absorption tower can be used U-shapedTower falls spraying in gas approach and sets nozzle, pre-processes ship tail gas, improve desulfuration efficiency, realize the abundant of ship spaceIt utilizes；The present invention hybrid system changeable using open type, closed cycle for different occasions, is concentrated by evaporation using waste heat from tail gasDesulfurization wastewater, using humidification removal methods processing exhaust problem containing mist.
Application number: 201510675487.8 disclose a kind of seawater, fresh water dual-purpose type ship tail gas desulphurizing system and technique,Belong to ship tail gas treatment and purification technical field, proposes through Venturi tube previous cleaning, scale traps separation, countercurrent spray towerWashing, aerating oxidation, cyclone removal particulate matter and be added lye improve it is various under the conditions of desulfurization effect technique.The techniqueDesulfuration efficiency is high, and structure is simple, and cheap, improvement cost is small, saves ship space, and realize seawater, fresh water dual-purpose,It can reach removal effect.Process system SO in midget plant test2Removal rate reach 90% or more, comply fully withMost stringent of discharge standard.
The application relative to a kind of 201510675487.8 seawater, fresh water dual-purpose type ship tail gas desulphurizing system and technique,The effect and exclusive technical effect for having any different played, as follows:
Difference one: increase scale traps separation, the present invention between the main desulfurizing tower of above-mentioned patent and venturi pretreaterIt is connected to by the wash-off mouth of itself bottom end with king-tower intracavity bottom using previous cleaning device, because being phase in previous cleaning device outlet gas velocityWhen fast, the sedimentation of solid is not only cannot be achieved in the addition of scale traps, gives system to increase resistance on the contrary.
Difference two: the above-mentioned main desulfurizing tower of patent is hollow-spraying-tower structure, is equipped with two layers from the bottom up inside king-tower of the present inventionPorous plate, every layer of porous plate top are equipped with spray gun, be equipped at the top of desulfurizing tower rotational flow plate defroster can by the moisture removal in flue gas,Flue gas is inversely contacted with doctor solution from bottom to top, and forms water membrane in porous plate surface, real when flue gas passes through moisture filmShow efficient mass transfer effect, improves the efficiency of desulfurization.Being equipped with rotational flow plate defroster in tower top simultaneously can be by the liquid in flue gasDrop removing.
Difference three: above-mentioned patent wastewater treatment uses cyclone, and the present invention uses rotary drum vacuum filter, can connect automaticallyContinuous operation, under vacuum condition, solid slag can form filter cake, and water content is lower, and the water content that cyclone has been handled is higher,It cannot get filter cake.
Difference four: above-mentioned patent wastewater treatment pipeline is directly connected to desulfurization tower bottom, and being directly connected to desulfurization tower bottom isLess than desulfurization wastewater, because seawater constantly recycles, wastewater treatment pipeline of the present invention extracts circulating water pool using displacement pumpThe waste water of bottom, waste water appear in bottom of pond by sedimentation heavy constituent, facilitate the extraction of desulfurization wastewater waste residue.
The technical solution of technology disclosed above and technical problem to be solved and the beneficial effect of generation with this hairIt is bright not identical, for more technical characteristics of the invention and technical problem to be solved and beneficial effect, skill disclosed aboveTechnical inspiration is not present in art file.
Summary of the invention
The purpose of the present invention is to provide a kind of engine of boat and ship flue gas desulphurization units and method, ship can in oceanic tripTo use seawater as absorbent, fresh water+alkaline matter is can be used in inland river traveling at home, can double mode operation, technique streamJourney is simple, system adjustability is strong, operating cost is low, absorbent can directly take seawater, can be discharged into ocean through processing after desulfurization.This hairTwo-grade desulfurizing technology that is bright to solve the problems, such as engine of boat and ship, making absorbent using seawater and combined using previous cleaning device+king-towerDesulfurization is carried out to engine of boat and ship exhaust gas.Porous plate can optimize flow field in tower, gas phase flow field can be made to be uniformly distributed, inhaled simultaneouslyIt receives liquid and forms one layer of liquid film in the top of porous plate, flue gas keeps the time of contact of flue gas and absorbing liquid and area big by liquid filmBig to increase, abundant mass transfer improves desulfuration efficiency.
In order to achieve the above objectives, present invention employs following technical solution, a kind of engine of boat and ship flue gas desulphurization unit,Including flue gas system, desulphurization system, sea water supply system, waste water treatment system, the outlet of the flue gas system connects desulfurization systemThe smoke inlet of system, the desulphurization system include desulfurizing tower, and the desulfurizing tower includes king-tower, previous cleaning device, and the previous cleaning device passes throughThe wash-off mouth of itself bottom end is connected to king-tower intracavity bottom, and the upper port of the king-tower is cleaning flue gases outlet mouth, under king-towerPort is waste liquid outlet mouth, and the desulphurization system further includes circulating pump, flowmeter, circulating water pool, and the seawater of the desulfurizing tower entersThe seawer outlet of mouth connection circulating water pool, and the pipe being connected between the seawater inlet of desulfurizing tower and the seawer outlet of circulating water poolCirculating pump and flowmeter are installed, the waste liquid outlet mouth of the king-tower connects the waste liquid entrance of circulating water pool, institute by pipeline on roadThe seawater inlet of sea water supply system outlet connection circulating water pool is stated, the waterwater entrance of the waste water treatment system connects recirculated waterThe wastewater outlet in pond；Installation porous plate and rotational flow plate defroster inside the king-tower, wherein porous plate is located at rotational flow plate defrosterLower section, the porous plate includes porous plate ontology, subregion riser, and the porous plate ontology uniformly gathers flowing hole, porous plateThis outer rim is connected and fixed with king-tower inner wall, subregion riser is arranged in porous plate body upper surface, subregion riser will be entirely moreOrifice plate ontology is divided at least two regions.
The height for stating subregion riser is between 50-100mm.
At least one spray gun is also set up inside the king-tower, and a spray gun, spray gun are also at least set inside the previous cleaning deviceEjiction opening direction downward, the arrival end of seawater inlet of the entrance of spray gun as desulfurizing tower, the spray gun in king-tower is pierced by masterFlowmeter outlet is connected after tower side wall, the arrival end of the spray gun in previous cleaning device connects flowmeter outlet after being pierced by previous cleaning device outer wall,Porous plate in king-tower is consistent with the quantity of the spray gun in king-tower, is respectively provided with a porous plate below each spray gun in king-tower,Spray gun in king-tower is located at below rotational flow plate defroster.
The flange of the gun inlets end setting connection, the ejiction opening of spray gun install spiral nozzle, the angle of spiral nozzleDegree is 120 °, and the quantity of nozzle is determined according to the sectional area of tower diameter, meets spray monolayer coverage 250% or more.
The waste liquid outlet mouth of the king-tower is inserted directly into the fluid-tight formed below of circulating water pool liquid level by taking over, in desulfurizing towerLiquid-gas ratio control in 15L/Nm3。
The flue gas system includes connecting pipe, booster fan, and connecting pipe both ends are separately connected the cigarette of previous cleaning device upper endGas entrance and engine of boat and ship exhaust manifold, install booster fan in connecting pipe.
The sea water supply system includes being sequentially connected filter, seawater detector one, sea water pump, and seawater pump discharge connects againConnect the seawater inlet of circulating water pool.
The waste water treatment system includes sequentially connected displacement pump, aeration tank, efflux pump, rotary drum vacuum filter, seaWater detector two, the aeration tank connect Aeration fan, and the rotary drum vacuum filter connects sludge-tank.
In order to achieve the above objectives, present invention employs following technical solution, a kind of engine of boat and ship desulfurizing method of exhaust gas,The following steps are included:
Step 1: engine of boat and ship flue gas enters the previous cleaning device of desulphurization system by flue gas system, while seawater passes through seaWater supply system also enters previous cleaning device, carries out previous cleaning desulfurization work to the flue gas for entering previous cleaning device by spray gun, then just elutionFlue gas and seawater after sulphur enter king-tower intracavity bottom together；
Step 2: after the flue gas after previous cleaning desulfurization enters in king-tower, rise, the spray gun in king-tower sprays porous plate, flue gasUniformly risen by the hole of porous plate, seawater carries out uniformly further desulfurization comprehensively to flue gas, and multistage spray gun is arranged in king-towerWith multistage porous plate, multiple desulfurization work is successively carried out；
Step 3: after flue gas after desulfurization process is finally by rotational flow plate defroster, become the flue gas of relative clean from masterThe upper port of tower is discharged, and carries out waste liquid outlet mouth of the seawater of desulfurization work in king-tower bottom and is discharged into circulating water pool, king-towerWaste liquid outlet mouth is inserted directly into the fluid-tight formed below of circulating water pool liquid level by adapter tube, and the liquid-gas ratio in desulfurizing tower is controlled in 15L/Nm3, desulfuration efficiency can reach 98% or more；
Step 4: after the waste water in circulating water pool is handled by waste water treatment system again, become relative clean seawater, be discharged intoSea.
Compared with the prior art, the invention has the following beneficial effects:
The second level that whole system is made absorbent using seawater or fresh water+alkaline matter and combined using previous cleaning device+king-towerDesulfurization technology, realizes the combination of " double mode+two-grade desulfurizing ", and double mode is that seawater or fresh water+alkalinity can be used in absorbentSubstance both of which, two-grade desulfurizing be flue gas first pass around previous cleaning device once cooled down, dedusting, desulfurization, afterwards enter king-towerInterior absorbing liquid and flue gas adverse current realize the effect of two-grade desulfurizing, and desulfuration efficiency is higher.
Previous cleaning device entrance installs spray gun, and absorbing liquid and flue gas downstream realize pre- dedusting, cooling and desulfurization in previous cleaning device, mainAbsorbing liquid is contacted with flue gas adverse current in tower, realizes the effect of two-grade desulfurizing.
It is equipped with porous plate in desulfurizing tower king-tower, flow field in tower can be optimized, gas phase flow field can be made to be uniformly distributed, inhaled simultaneouslyIt receives liquid and forms one layer of liquid film in the top of porous plate, flue gas keeps the time of contact of flue gas and absorbing liquid and area big by liquid filmBig to increase, abundant mass transfer improves desulfuration efficiency.
Entire porous plate is divided into several regions by subregion riser, can guarantee that the liquid film that each region is formed on orifice plate is thickDegree be it is identical, the height of the subregion riser 27 is between 50~100mm.
The present invention realizes engine of boat and ship exhuast gas desulfurization.Seawater and fresh water+operation of alkaline matter double mode, work can be usedSkill process is simple, system adjustability is strong, operating cost is low, is suitable for engine of boat and ship exhuast gas desulfurization.
The application relative to a kind of 201510675487.8 seawater, fresh water dual-purpose type ship tail gas desulphurizing system and technique,The effect and exclusive technical effect for having any different played, as follows:
Difference one: increase scale traps separation, the present invention between the main desulfurizing tower of above-mentioned patent and venturi pretreaterIt is connected to by the wash-off mouth of itself bottom end with king-tower intracavity bottom using previous cleaning device, because being phase in previous cleaning device outlet gas velocityWhen fast, the sedimentation of solid is not only cannot be achieved in the addition of scale traps, gives system to increase resistance on the contrary.
Difference two: the above-mentioned main desulfurizing tower of patent is hollow-spraying-tower structure, is equipped with two layers from the bottom up inside king-tower of the present inventionPorous plate, every layer of porous plate top are equipped with spray gun, be equipped at the top of desulfurizing tower rotational flow plate defroster can by the moisture removal in flue gas,Flue gas is inversely contacted with doctor solution from bottom to top, and forms water membrane in porous plate surface, real when flue gas passes through moisture filmShow efficient mass transfer effect, improves the efficiency of desulfurization.Being equipped with rotational flow plate defroster in tower top simultaneously can be by the liquid in flue gasDrop removing.
Difference three: above-mentioned patent wastewater treatment uses cyclone, and the present invention uses rotary drum vacuum filter, can connect automaticallyContinuous operation, under vacuum condition, solid slag can form filter cake, and water content is lower, and the water content that cyclone has been handled is higher,It cannot get filter cake.
Difference four: above-mentioned patent wastewater treatment pipeline is directly connected to desulfurization tower bottom, and being directly connected to desulfurization tower bottom isLess than desulfurization wastewater, because seawater constantly recycles, wastewater treatment pipeline of the present invention extracts circulating water pool using displacement pumpThe waste water of bottom, waste water appear in bottom of pond by sedimentation heavy constituent, facilitate the extraction of desulfurization wastewater waste residue.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is Structure of Flue Gas Desulfuration Absorbing figure of the invention；
Fig. 3 is Fig. 2 inward turning flowing plate demister structure chart of the present invention；
Fig. 4 is perforated plate construction figure in Fig. 2 of the present invention.
Marked in the figure: 1, connecting pipe, 2, booster fan, 3, desulfurizing tower, 4, filter, 5, seawater detector one, 6, seaWater pump, 7, circulating pump, 8, circulating water pool, 9, displacement pump, 10, aeration tank, 11, efflux pump, 12, sludge-tank, 13, flowmeter, 14,Aeration fan, 15, rotary drum vacuum filter, 16, seawater detector two, 17, desulfurizing tower import, 18, spray gun one, 19, previous cleaning device,20, outlet mouth, 21, king-tower, 22, porous plate one, 23, spray gun two, 24, porous plate two, 25, spray gun three, 26, spiral board demistingDevice, 27, subregion riser, 28, porous plate ontology.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of technical solution referring to FIG. 1 to FIG. 4:
At a kind of engine of boat and ship flue gas desulphurization unit, including flue gas system, desulphurization system, sea water supply system, waste waterReason system, the smoke inlet of the outlet connection desulphurization system of the flue gas system, the desulphurization system includes desulfurizing tower 3, describedDesulfurizing tower includes king-tower 21, previous cleaning device 19, and the previous cleaning device 19 is connected by the wash-off mouth and 21 intracavity bottom of king-tower of itself bottom endLogical, the upper port of the king-tower is cleaning flue gases outlet mouth, and the lower port of king-tower is waste liquid outlet mouth 20, and the desulphurization system is alsoIncluding circulating pump 7, flowmeter 13, circulating water pool 8, the seawater inlet of the desulfurizing tower connects the seawer outlet of circulating water pool, andCirculating pump 7 and flowmeter 19 are installed on the pipeline being connected between the seawater inlet of desulfurizing tower and the seawer outlet of circulating water pool,The waste liquid outlet mouth of the king-tower connects the waste liquid entrance of circulating water pool by pipeline, and the sea water supply system outlet connection followsThe seawater inlet in ring pond, the wastewater outlet of the waterwater entrance connection circulating water pool of the waste water treatment system；The king-tower 21Inside installation porous plate and rotational flow plate defroster 27, wherein porous plate is located at the lower section of rotational flow plate defroster, the porous plate packetInclude porous plate ontology 28, subregion riser 27, the porous plate ontology uniformly gathers flowing hole, this outer rim of porous plate and king-towerInner wall is connected and fixed, and subregion riser 27 is arranged in 28 upper surface of porous plate ontology, entire porous plate ontology is divided by subregion riserAt least two regions.2 porous plates, respectively porous plate 1, porous plate 2 24 have been used in drawing.
The height for stating subregion riser is between 50-100mm.
At least one spray gun is also set up inside the king-tower, and a spray gun, spray gun are also at least set inside the previous cleaning deviceEjiction opening direction downward, the arrival end of seawater inlet of the entrance of spray gun as desulfurizing tower, the spray gun in king-tower is pierced by masterFlowmeter outlet is connected after tower side wall, the arrival end of the spray gun in previous cleaning device connects flowmeter outlet after being pierced by previous cleaning device outer wall,Porous plate in king-tower is consistent with the quantity of the spray gun in king-tower, is respectively provided with a porous plate below each spray gun in king-tower,Spray gun in king-tower is located at below rotational flow plate defroster.2 spray guns, respectively spray gun 1, spray gun have been used in drawing in king-tower2 23, a spray gun has been used in previous cleaning device, is spray gun 3 25.
The flange of the gun inlets end setting connection, is convenient for connecting pipe, and pipeline reconnects flowmeter outlet, spray gunArrival end is welding with king-tower side-wall hole when being pierced by king-tower side wall, and similarly, spray gun and previous cleaning device are also welding.The spray of spray gunOutlet installation spiral nozzle, the angle of spiral nozzle are 120 °, can uniformly be sprayed down, the spray system in desulfurizing tower is this skillRoutine techniques in art field.The quantity of nozzle according to the sectional area of tower diameter determine, meet spray monolayer coverage 250% withIt is upper.
The waste liquid outlet mouth of the king-tower is inserted directly into the fluid-tight formed below of circulating water pool liquid level by taking over, in desulfurizing towerLiquid-gas ratio control in 15L/Nm3。
The flue gas system includes connecting pipe 1, booster fan 2, and connecting pipe both ends are separately connected previous cleaning device upper endSmoke inlet and engine of boat and ship exhaust manifold, install booster fan in connecting pipe.The smoke inlet of previous cleaning device upper end isFor the desulfurizing tower import 17 in figure.
The sea water supply system includes being sequentially connected filter 4, seawater detector 1, sea water pump 6, seawater pump dischargeReconnect the seawater inlet of circulating water pool.
The waste water treatment system includes sequentially connected displacement pump 9, aeration tank 10, efflux pump 11, rotating cylinder vacuum filterMachine 15, seawater detector 2 16, the aeration tank connect Aeration fan 14, and the rotary drum vacuum filter connects sludge-tank 12.
The present invention provides a kind of technical solution referring to FIG. 1 to FIG. 4: a kind of engine of boat and ship desulfurizing method of exhaust gas, includingFollowing steps:
Step 1: engine of boat and ship flue gas enters the previous cleaning device of desulphurization system by flue gas system, while seawater passes through seaWater supply system also enters previous cleaning device, carries out previous cleaning desulfurization work to the flue gas for entering previous cleaning device by spray gun, then just elutionFlue gas and seawater after sulphur enter king-tower intracavity bottom together；
Step 2: after the flue gas after previous cleaning desulfurization enters in king-tower, rise, the spray gun in king-tower sprays porous plate, flue gasUniformly being risen by the hole of porous plate, the liquid film that seawater is formed on orifice plate carries out uniformly further desulfurization comprehensively to flue gas,Multistage spray gun and multistage porous plate are set in king-tower, successively carry out multiple desulfurization work；Entire porous plate is divided by subregion riserSeveral regions can guarantee that the thickness of liquid film that each region is formed on orifice plate is identical；
Step 3: after flue gas after desulfurization process is finally by rotational flow plate defroster, become the flue gas of relative clean from masterThe upper port of tower is discharged, and carries out waste liquid outlet mouth of the seawater of desulfurization work in king-tower bottom and is discharged into circulating water pool, king-towerWaste liquid outlet mouth is inserted directly into the fluid-tight formed below of circulating water pool liquid level by adapter tube, and the liquid-gas ratio in desulfurizing tower is controlled in 15L/Nm3, desulfuration efficiency can reach 98% or more；
Step 4: after the waste water in circulating water pool is handled by waste water treatment system again, become relative clean seawater, be discharged intoSea.
The desulfurizing tower that the desulfurizing tower uses previous cleaning device and king-tower to combine, desulfurizing tower overall material, which is selected, is not less than 2205Stainless steel, previous cleaning device use Venturi tube structure, and flue gas is realized flue gas cool-down and primary wash by spray gun one by previous cleaning device, taken offSulphur, have gas-liquid contact is abundant, crushing is small, dust removing effects are good, realize removing about 50% SO2, can be reduced king-towerDesign height；Two layers of porous plate is equipped with inside king-tower from the bottom up, every layer of porous plate top is equipped with spray gun, is equipped at the top of desulfurizing towerMoisture removal in flue gas, desulfurization tower bottom can be equipped with outlet mouth by rotational flow plate defroster, be inserted directly into recirculated water by adapter tubeThe fluid-tight formed below of pond liquid level, the liquid-gas ratio in desulfurizing tower are controlled in 15L/Nm3, desulfuration efficiency can reach 98% or more.
Previous cleaning device entrance installs spray gun, and absorbing liquid and flue gas downstream realize pre- dedusting, cooling and desulfurization in previous cleaning device, mainAbsorbing liquid is contacted with flue gas adverse current in tower, realizes the effect of two-grade desulfurizing.
The spray gun is connected using external flanges, it can be achieved that on-bne repair is replaced, and lance head installs spiral nozzle, spiral sprayThe angle of mouth is 120 °, and the quantity of nozzle is determined according to the sectional area of tower diameter, meets spray monolayer coverage 250% or more and isIt can.
The porous plate is made of subregion riser and orifice plate, and entire porous plate is divided into several regions, energy by subregion riserGuarantee thickness of liquid film that each region is formed on orifice plate be it is identical, the height of the subregion riser is between 50~100mm.
The sea water supply system is entered seawater lift using sea water pump after the sundries in filter removal seawaterCirculating water pool.When ship running is at inland river, without seawater, then can in the circulating water pool addition alkaline matter (NaOH orMgO), the switching of two kinds of desulfurizing agent operating modes of seawater or fresh water+alkaline matter is realized.
The waste water treatment system, due to the seawater dissolved oxygen DO decline after desulfurization, COD COD increases, thereforeUsing Air Exposure, force to be passed through air into waste water, by carbon dioxide eliminating seawater, and the DO in seawater will increase, CODIt can reduce accordingly, by the sludge in rotary drum vacuum filter removal waste water, treated, and sulfate radical in waste water ion can increasePH value can be adjusted by the way that seawater is added greatly, pH value, which is greater than 6.5, can be discharged into sea.
The flowmeter can real-time detection doctor solution internal circulating load, the size of internal circulating load can be according to desulfurizing tower exiting flue gas pointAnalyzer can increase the internal circulating load of doctor solution when SO2 concentration is higher, when SO2 concentration is lower, can reduce the circulation of doctor solutionAmount.
The seawater detector two detects the indexs such as ocean temperature, pH value, COD, can be discharged into sea after up to standard.
The present invention is the desulfurization for adding alkaline matter to make absorbent using seawater or fresh water and being combined using previous cleaning device+king-towerTechnology, alkaline matter can use NaOH or MgO, and waste water can be directly discharged into ocean through processing, whole system include flue gas system,Desulphurization system, sea water supply system, waste water treatment system, the flue gas system includes connecting pipe 1, booster fan 2, by startingMachine chimney breast enters desulfurizing tower 3 after the pressurization of booster fan 2, and the desulphurization system includes desulfurizing tower 3, circulating pump 7, flow13, circulating water pool 8 are counted, the sea water supply system includes filter 4, seawater detector 1, sea water pump 6, the wastewater treatmentSystem includes displacement pump 9, aeration tank 10, Aeration fan 14, efflux pump 11, sludge-tank 12, rotary drum vacuum filter 15, seawater inspectionSurvey instrument 2 16.
The desulfurizing tower 3 is combined using previous cleaning device and king-tower in U-typed shape, and desulfurizing tower 3 is cylindrical shape, overall materialIt selects and is not less than 2205 stainless steels, previous cleaning device uses Venturi tube structure, and previous cleaning device top is equipped with desulfurizing tower import 17, spray gunOne 1, venturi previous cleaning device 19, previous cleaning device lower part access king-tower bottom using elbow, are equipped with porous plate in king-tower, are at least arranged oneLayer porous plate, this example are equipped with two layers of porous plate, and spray gun is equipped with above every layer of porous plate, installs spiral board demisting at the top of king-towerDevice 27, king-tower bottom are equipped with outlet mouth 20, are inserted into the fluid-tight formed below of 8 liquid level of circulating water pool by adapter tube.
The porous plate is made of subregion riser 27 and orifice plate 28, and entire porous plate is divided into several areas by subregion riser 27Domain, the height of the subregion riser 27 is between 50-100mm.
6 import of sea water pump connects filter 4, seawater detector 1, the outlet of sea water pump 6 connection circulating water pool 8, institute7 import of circulating pump connection circulating water pool 8 is stated, installation flowmeter 13 in the outlet of circulating pump 7 connects spray gun, and 9 import of displacement pump connectsConnect circulating water pool 8, the outlet of displacement pump 9 connection aeration tank 10, the Aeration fan 14 by pipeline to 10 bottom blowing of aeration tank,11 import of efflux pump connects aeration tank, the outlet of efflux pump 11 connection rotary drum vacuum filter 15, the rotating cylinder vacuum filter15 lower curtate of machine adapter tube connection sludge-tank 12,15 top cyclone pipe of rotary drum vacuum filter outlet connection seawater detector 2 16, instituteIt states seawater detector two and detects the indexs such as ocean temperature, pH value, COD.
The present invention is a kind of to make absorbent using seawater or fresh water+alkaline matter and combine two using previous cleaning device+king-towerGrade desulfurization technology carries out the method and device of desulfurization to engine of boat and ship exhaust gas.The present invention realizes seawater or fresh water adds basic speciesMatter makees absorbent, removes engine of boat and ship exhuast gas desulfurization.The desulfurization technology that the present invention uses previous cleaning device+king-tower to combine, waste waterOcean can be directly discharged into through processing.The combination of " double mode+two-grade desulfurizing " is realized, double mode operation, process flow is simple, isAdjustability of uniting is strong, operating cost is low.
In the description of the present invention, it is to be understood that, temporald eixis or positional relationship are orientation based on the figureOr positional relationship, it is merely for convenience of the description present invention, rather than the device or element of indication or suggestion meaning there must be spyFixed orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be withA variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understandingAnd modification, the scope of the present invention is defined by the appended.