CN104265427A - Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship - Google Patents
Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship Download PDFInfo
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- CN104265427A CN104265427A CN201410386929.2A CN201410386929A CN104265427A CN 104265427 A CN104265427 A CN 104265427A CN 201410386929 A CN201410386929 A CN 201410386929A CN 104265427 A CN104265427 A CN 104265427A
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention provides a medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for a ship. Heat exchange is carried out on outlet waste gas of a main engine through a superheater and an evaporator of a waste heat boiler; steam-water separation is carried out on outlet steam of the evaporator through a steam pocket; one part of saturated steam enters the superheater to be superheated, and superheating steam is generated to push a steam turbine to rotate and then drive an electric generator to generate electricity; the other part of the saturated steam enters a daily steam system, saturated water of a steam outlet pocket passes through a circulating pump to enter a waste heat boiler, outlet steam of the steam turbine is condensed through a condenser, then, the outlet steam of the steam turbine and outlet cooling water of the daily steam system respectively enter a hot water well, and enter a waste heat boiler via a water feeding pump of the hot water well, outlet smoke of the waste heat boiler passes through a desulfurization washing tower to be washed, and sulfur oxide SOx and particles PM in recycling waste gas are removed. According to the system, on the basis of effectively improving waste heat energy utilization efficiency of the engine, ultralow emission of the SOx and the PM of the diesel engine can be achieved.
Description
Technical field
What the present invention relates to is a kind of marine diesel engine waste heat recovery and desulfurization combined cycle system.
Background technique
Energy problem is a first-class major issue in economic development always.International Maritime Organization IMO newly studies EEDI (the Energy Efficiency Design Index changed, new ship Energy design index) rule improves day by day to emissions reduction, the requirement that reduces shipping transport cost, the low-yield utilization ratio of boats and ships, except by the face of great number fuel cost except, also by the face of extra fine, to compensate the destruction to environment.Therefore, boats and ships energy consumption is effectively reduced very urgent with discharge.The equipment that boats and ships directly consume fuel is diesel main engine, subsidiary engine and donkey boiler etc.Wherein, main frame energy consumption ratio is maximum, the net quantity of heat that fuel combustion sends, and only some changes mechanical work into, and all the other are all used heat, and Waste Heat Recovery System (WHRS) effectively can utilize exhaust energy, and produces the electric power output being equivalent to main engine power 11%.If main frame waste gas can be utilized to carry out generating electricity or providing steam as supplementary equipment thermal source, then can Substitute For Partial subsidiary engine and donkey boiler, the effect reaching energy-conservation simultaneously and reduce discharging.Therefore the waste heat of marine main engine is fully reclaimed, significant.
The high-power medium speed engine of boats and ships not only can be used for Ship Propeling, also land generating is widely used in, for effectively reducing user cost and adopting the heavy oil HFO of high-sulfur in a large number, adopt miller cycle and be aided with internal EGR measure and also effectively can reduce NOx emission, if but waste gas sulphur oxide SOx does not take the outer measure of machine, certainly will cause environmental pollution.Current sulfur method has many, and wherein employing sodium alkali desulfurized effect is good, efficiency is high.This is because soda compound is to SO
2gas sorption capability is strong, and the sodium salt solubility of generation is large, has the ability remained on by absorption compound in solution, can avoid the fouling in absorption equipment and silt up.Waste gas washing desulphurization packing tower as a kind of mass transfer apparatus of absorption and separation, have that efficiency is high, pressure drop is low, liquid holdup is little, simple structure, installation easily, etc. advantage be widely used.
The mean temperature row temperature of boats and ships medium speed diesel boat diesel engine waste gas is general more than 300 DEG C, and after boiler, exhaust gas temperature generally can drop to 170 DEG C.Research finds, along with the rising of inlet flue gas temperature, the desulphurization efficiency of packing tower desulfur technology will reduce, and when temperature reaches more than 190 DEG C, desulphurization efficiency is almost nil.Therefore, waste gas enters waste gas washing desulphurization packing tower ingress and first cools to 60 ~ 75 DEG C through spraying cooling, is conducive to SO
2absorption, and by the SO in waste gas
2be catalytically converted into SO
3, after reacting with the absorption liquid in desulfurization packing tower, generate stable SO
4 2-, desulfurized effect is higher.
Summary of the invention
The object of the invention is to propose a kind ofly can either reduce the exhuast gas desulfurization of boats and ships medium speed diesel and the waste heat recovery combined cycle system that diesel emission can reach again heat recovery effect.
The object of the present invention is achieved like this:
Main frame 1 outlet exhaust is through the superheater 7 of exhaust heat boiler B, vaporizer 4 heat exchange, vaporizer 4 outlet vapor is separated through drum 6 carbonated drink, it is overheated that the saturated vapour part going out drum 6 enters superheater 7, generation superheated vapor pushing turbine 5 rotates drive electrical generators 10 again and generates electricity, the another part going out the saturated vapour of drum 6 enters daily vapour system C, the saturation water going out drum 6 enters exhaust heat boiler B through recycle pump 9, the outlet vapor of steam turbine 5 enters hot well D respectively through the outlet cooling water of vapour condenser 11 condensation and daily vapour system, the water source as water supply system of hot well D, exhaust heat boiler B is entered through feed water pump 12, the exiting flue gas of exhaust heat boiler B washs through desulfurization washing tower A and removes oxysulfide SOx in EGR gas and particle PM.
The present invention proposes and a kind ofly can either reduce the association system that diesel emission can reach again heat recovery effect.Exhuast gas desulfurization (SOx) wash mill is installed in the present invention additional in boats and ships medium speed diesel, installs the association system that waste heat recovery (WHR) efficient joint circulation means reclaims diesel exhaust waste heat again additional simultaneously.Effectively improving on the basis of engine waste heat energy utilization efficiency, the minimum discharge of diesel engine SOx and PM also can be realized.
The present invention includes main frame, exhaust heat boiler, desulfurization packing tower, steam turbine etc.Sodium alkali desulfurization washing technology is adopted, other sedimentss such as the oxysulfide SOx effectively in removal EGR gas and particle PM in exhuast gas desulfurization (SOx) wash mill; Because this wash mill requires to reduce to inlet flue gas temperature, concerning with boats and ships medium speed diesel, the mean temperature of waste gas is generally more than 300 DEG C, therefore install again waste heat recovery (WHR) efficient joint circulation means additional, exhaust gas temperature will be reduced to about 160 DEG C, both improve the energy of waste gas recovery, again reduce packing tower exhaust gas entrance temperature.In waste heat recovery plant, utilize Steam Actuation steam turbine to carry out generating electricity or providing steam as supplementary equipment thermal source, the effect reaching energy-conservation and reduce discharging, effectively raises the utilization ratio of engine waste heat.
Beneficial effect of the present invention is: the present invention proposes to adopt WHR exhaust heat boiler steam generating system to reclaim used heat, effectively reduce the temperature of waste gas simultaneously, on this basis, fit applications is based on sodium alkali waste gas washing desulphurization system, effectively can remove the SOx in waste gas, owing to adopting effective spray system, also the PM in waste gas and part NOx can be effectively reduced, therefore, based on this combined cycle system, not only effectively can remove SOx and PM in waste gas, also effectively improve the energy utilization efficiency of whole power system simultaneously by Waste Heat Recovery System (WHRS).
Accompanying drawing explanation
Fig. 1 is for realizing boats and ships medium speed diesel power system Energy harvesting based on the circulation of waste heat recovery (WHR) efficient joint and exhuast gas desulfurization (SOx) and reduce the system schematic that in waste gas, SOx and PM discharges.
Fig. 2 is a kind of list pressure exhaust gas turbine system of twin screw promotion diesel engine device, and reduces by desulfurization packed tower the system schematic that waste gas carries out SOx and PM discharge.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.In Fig. 1 and Fig. 2, the implication of a symbol is: 1, main frame; 2, pressurized machine; 3, turbine; 4, vaporizer; 5, steam turbine; 6, drum; 7, superheater; 8, modulating valve; 9, recycle pump; 10, generator; 11, vapour condenser; 12, feed water pump; 13, the pre-spray equipment of wash water; 14, high temperature spray system; 15, packing layer; 16, demister; 17, purging system; A, desulfurization washing tower; B, exhaust heat boiler; C, daily vapour system; D, hot well.
The waste gas that diesel engine in Fig. 1 produces is used for recovery waste heat through exhaust boiler.Desulfurization packing tower in Fig. 1 discharges for reducing SOx and PM of boiler export place waste gas.
In waste heat recovery (WHR) the efficient joint circulatory system, feed water pump 12 draws water from hot well, the preheater preheats in exhaust heat boiler, then through evaporator 4 heating evaporation; In the circulation loop producing saturated vapour, drum 6 serves the effect that carbonated drink is separated, and an isolated saturated vapour part enters daily vapour system C outward supplying heat, finally gets back to hot well; Another part heats through superheater 7, produces superheated vapor.
In turbine generating system design, the superheated vapor that exhaust heat boiler produces, for steam turbine 5 filling acting, drive electrical generators 10 generates electricity, and the exhaust steam after acting enters after vapour condenser 11 is condensed and enters hot well D.Superheated vapor outlet port is provided with relief valve (8), and part superheated vapor directly can enter condensation in vapour condenser 11 by it and enter hot well D, plays the effect controlling superheated vapor amount needed for steam turbine 5.
In desulfurization packing tower unit, the waste gas of heat boiler outlet enters packing tower, and first after the alkaline wash cooling that the pre-spray equipment 13 of wash water sprays, temperature can be down to 60 ~ 75 DEG C, a part of SO simultaneously in Absorbable rod waste gas
2gas and the partial particulate object in removing waste gas and greasy dirt.Employ area load at the packing layer (14) of packing tower and have CrO
3-SnO
2the filler of catalyzer, for by the SO in waste gas
2gas catalysis changes into SO
3gas, effectively can improve marine diesel engine desulfurization packing tower efficiency.
Fig. 2 design be the turbine generating system of a kind of pair of waste heat recovering device, and reduced SOx and PM of waste gas by desulfurization packed tower.For Large Container Ship and Ultra large crude carrier, they take four main frame twin screw designs usually, cause relatively high waste gas loss.Adopt two waste heat recovering device, abundant recovery waste heat; The design of Fig. 2, two exhaust heat boilers share a drum 6, optimize exhaust heat boiler on ship and arrange.Boiler export waste gas finally enters based on sodium alkali waste gas washing desulphurization system, effectively can remove the SOx in waste gas, owing to adopting effective spray system, also can effectively reduce the PM in waste gas and part NOx.
Claims (2)
1. boats and ships medium speed diesel exhuast gas desulfurization and waste heat recovery combined cycle system, it is characterized in that: main frame (1) outlet exhaust is through the superheater (7) of exhaust heat boiler (B), vaporizer (4) heat exchange, vaporizer (4) outlet vapor is separated through drum (6) carbonated drink, it is overheated that the saturated vapour part going out drum (6) enters superheater (7), produce superheated vapor pushing turbine (5) and rotate again drive electrical generators (10) generating, the another part going out the saturated vapour of drum (6) enters daily vapour system (C), the saturation water going out drum (6) enters exhaust heat boiler (B) through recycle pump (9), the outlet vapor of steam turbine (5) enters hot well (D) respectively through the outlet cooling water of vapour condenser (11) condensation and daily vapour system, the water source as water supply system of hot well (D), exhaust heat boiler (B) is entered through feed water pump (12), the exiting flue gas of exhaust heat boiler (B) removes oxysulfide SOx in EGR gas and particle PM through desulfurization washing tower (A) washing.
2. boats and ships medium speed diesel according to claim 1 exhuast gas desulfurization and waste heat recovery combined cycle system, is characterized in that: described exhaust heat boiler (B) is two, and two exhaust heat boilers share a drum (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386929.2A CN104265427A (en) | 2014-08-07 | 2014-08-07 | Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410386929.2A CN104265427A (en) | 2014-08-07 | 2014-08-07 | Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship |
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| CN104265427A true CN104265427A (en) | 2015-01-07 |
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|---|---|---|---|
| CN201410386929.2A Pending CN104265427A (en) | 2014-08-07 | 2014-08-07 | Medium speed diesel engine waste gas desulfurization and waste heat recovery combined cycle system for ship |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879555A (en) * | 2016-06-12 | 2016-08-24 | 哈尔滨工程大学 | Combined cleaning device for waste gas of low speed marine diesel engine |
| CN107486016A (en) * | 2017-08-22 | 2017-12-19 | 哈尔滨工程大学 | A kind of low-temp desulfurization denitration technology of marine low speed diesel engine suitable for high-sulfur fuel oil |
| CN109252910A (en) * | 2018-10-30 | 2019-01-22 | 中船动力研究院有限公司 | A kind of exhaust heat utilization system |
| CN109925847A (en) * | 2017-03-28 | 2019-06-25 | 三菱日立电力***株式会社 | Ship desulfurizer and ship |
| CN114109544A (en) * | 2021-11-22 | 2022-03-01 | 沪东中华造船(集团)有限公司 | LNG ship redundant volatile gas combustion power generation device and combustion power generation method |
| CN115263597A (en) * | 2022-09-21 | 2022-11-01 | 苏州亚太精睿传动科技股份有限公司 | Hybrid power system utilizing self-heating auxiliary direct drive and driving method thereof |
| WO2024067704A1 (en) * | 2022-09-30 | 2024-04-04 | 中船动力研究院有限公司 | Dual-fuel engine exhaust gas recirculation system |
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| CN103691267A (en) * | 2013-12-19 | 2014-04-02 | 海南中航特玻材料有限公司 | Low-temperature synchronous denitration and desulfurization equipment and process for flue gas |
| CN103925025A (en) * | 2014-04-18 | 2014-07-16 | 哈尔滨工程大学 | Waste heat recovery device for marine diesel engine exhaust |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879555A (en) * | 2016-06-12 | 2016-08-24 | 哈尔滨工程大学 | Combined cleaning device for waste gas of low speed marine diesel engine |
| CN105879555B (en) * | 2016-06-12 | 2017-10-31 | 哈尔滨工程大学 | A kind of marine low speed diesel exhaust composite washing device |
| CN109925847A (en) * | 2017-03-28 | 2019-06-25 | 三菱日立电力***株式会社 | Ship desulfurizer and ship |
| CN107486016A (en) * | 2017-08-22 | 2017-12-19 | 哈尔滨工程大学 | A kind of low-temp desulfurization denitration technology of marine low speed diesel engine suitable for high-sulfur fuel oil |
| CN109252910A (en) * | 2018-10-30 | 2019-01-22 | 中船动力研究院有限公司 | A kind of exhaust heat utilization system |
| CN114109544A (en) * | 2021-11-22 | 2022-03-01 | 沪东中华造船(集团)有限公司 | LNG ship redundant volatile gas combustion power generation device and combustion power generation method |
| CN115263597A (en) * | 2022-09-21 | 2022-11-01 | 苏州亚太精睿传动科技股份有限公司 | Hybrid power system utilizing self-heating auxiliary direct drive and driving method thereof |
| WO2024067704A1 (en) * | 2022-09-30 | 2024-04-04 | 中船动力研究院有限公司 | Dual-fuel engine exhaust gas recirculation system |
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Application publication date: 20150107 |
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