CN103388525B - Two-stroke large diesel engine - Google Patents
Two-stroke large diesel engine Download PDFInfo
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- CN103388525B CN103388525B CN201310172357.3A CN201310172357A CN103388525B CN 103388525 B CN103388525 B CN 103388525B CN 201310172357 A CN201310172357 A CN 201310172357A CN 103388525 B CN103388525 B CN 103388525B
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- steam
- diesel engine
- large diesel
- stroke large
- waste gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
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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
Abstract
The present invention relates to a kind of two-stroke large diesel engine, and it includes：At least one combustion chamber limited by cylinder and piston coefficient with bent axle, the combustion chamber have at least one exhaust outlet for being used to waste gas be discharged in exhaust duct and at least one air inlet for being used to input scavenging gas from air intake duct；At least one turbocharger (1), the turbocharger have the compressor in air intake duct and the turbine in exhaust duct；And branch and guided from exhaust duct or combustion chamber to the recirculating line (3) of air intake duct, for waste gas shunting is directed back in air intake duct, there is at least one recycling compressor (10) in the recirculating line, so as to which the waste gas led back to is shunted in the scavenging air-flow being pressed into air intake duct.In order to drive recycling compressor, provided with the steam turbine (8) coupled with recycling compressor in a manner of transmitting torque, steam turbine forms the steamturbine machine assembly of transmission mechanism-free with recycling compressor.
Description
Technical field
The present invention relates to a kind of two-stroke large diesel engine, and it is recycled with turbocharging and waste gas.
Background technology
Particularly in the case of large-scale diesel engine, multiple turbocharging levels are common, for always from engine
Energy is extracted in waste gas, thus the pressurized air to engine to be transfused to or to be transfused to engine pressurization gas carry out
The burning compressed and so improved.Particularly in the case of multicylinder engine multiple turbochargings are also used for this
Device, they form turbocharger stage together.
Except being related in addition to the measure such as turbocharging of the burning gases or waste gas recovery energy of discharge, current focus
It is to be directed to burning as clean as possible.A part for waste gas is recycled to the air inlet side of engine for this, so as to according to
This mode reduces ignition temperature and thus reduces the NO of engineXDischarge.
Gas treatment equipment, such as waste gas cleaning device are often provided with recirculating line at this, so that will not the phase
Hope ground that the sulphur included in the waste gas led back to and carbon black granules are backed into combustion chamber, although being incited somebody to action because such waste gas is led back to
Cause the NO of engineXDischarge reduces, but the sulphur burden for causing waste gas to be improved in discharging for this.In so such as the applicant
Germany Patent document DE102009010808B3 show it is a kind of include waste gas recycling diesel engine, recycling wherein
Air-washer in pipeline be present.
When flowing through this gas treatment equipment, cause the pressure drop in the waste gas led back to.Both made do not flowing through this
In the case of kind gas treatment equipment, the pressure in the waste gas led back to often also can be waste gas without additional compressor without high arrive
In the case of be conducted directly in scavenging air or the pressurized air in air intake duct, the pressure finally be equal to combustion chamber in is taking
Go out to lead back to pressure at the time of waste gas.This particularly sets up in situations below, i.e., when recirculating line is in scavenging gas height
Press side, to be passed into the downstream of pressurized air turbocharger or turbocharger stage in air intake duct, in the turbocharging
On device or turbocharger stage, the scavenging air or pressurized air that to input engine are compressed.It is desirable that, what is led back to is useless
Gas is imported into air intake duct in scavenging with gas high pressure side, and thus turbine upstream of the recirculating line in turbocharger
From air intake duct branch, the waste gas led back to need not yet to be passed through the booster air compressor of turbocharger stage, by for this
It can will reduce the gross efficiency of internal combustion engine.
A kind of compound automotive diesel of turbine is described in Germany Patent document DE102007052118A1, is included in
On high-tension side waste gas, which returns, to be drawn, that is, including recirculating line turbocharger turbine upstream from the branch of exhaust duct simultaneously
And the downstream for being included in booster air compressor is passed through in air intake duct.In the turbine of the turbocharger for compressing charge air
The downstream of machine have one it is other can be by not leading back to but be discharged to the work turbine machine that the waste gas in environment flows through and be integrated into
In gas exhaust piping, the work turbine machine is connected on bent axle via controllable hydraulic coupler and transmission mechanism.Here, lead back to
Waste gas cooled down by the heat exchanger that is disposed on recirculating line.These heat exchangers are embodied as steam generator and with giving up
Heat exchanger-steam generator that others on air pipe in work turbine machine downstream are accordingly formed is used for driving steam together
Turbine, the steam turbine are output to driving power via hydraulic coupler the auxilitary unit example on bent axle or in power train
On generator.On the one hand it can be extracted not by engine turbine from the waste gas being discharged into environment by work turbine machine
The energy that booster utilizes.But according to DE102007052118A, additional work turbine machine is mainly used to by adjusting work
Make the hydraulic coupler that turbine is connected with bent axle and adjust in the paths for discharge waste gas as obstacle work whirlpool
At turbine occur retarding pressure, and thus regulation lead back to waste gas relative to discharge waste gas share and in exhaust duct in whirlpool
The existing pressure being had by leading back to waste gas in wheel booster upstream.The hydraulic coupler that work turbine machine is connected with bent axle is therefore
Finally it is adjusted to, the waste gas of recycling is increased in scavenging gas high pressure side stress level present in air intake duct
On.
In two-stroke large diesel engine, it is included on high-tension side waste gas time and drawn, i.e., including recirculating line in turbine
The turbine upstream of booster is from the branch of exhaust duct and is included in the compressor downstream of turbocharger and is passed through in air intake duct,
The compressor of motorized motions is conversely provided with generally in recirculating line, so as to which recycling gas is increased in scavenging gas
High-pressure side is present in air intake duct on stress level, such as the international patent documents WO94/29587A1 (states from the applicant
Border application number PCT/DK93/00938) it is available.There is gas washer in recirculating line in the upstream of compressor there.It is used for
The electrical power required for compressor in driving recirculating line herein can be for example from for running by oil-engine driven ship
Boat-carrying power network generating set obtain.But thus reduce the gross efficiency of internal combustion engine.
Another kind is suggested, via in the turbine drives recirculating line of hydraulic in such diesel engine
Fan, the turbine again via the hydraulic pump being suspended on engine shaft be supplied to high pressure liquid force feed, referring to United States Patent (USP) Shen
Please US2009/0173071A1.A kind of cooler for being used for cooling down the waste gas led back is have also been disclosed there.But hydraulic pressure
The power picked out in engine shaft punishment of pump equally reduces the gross efficiency of diesel engine.
Moral of another example of two-stroke large diesel engine with waste gas or combustion gas recirculation from the applicant
Obtained in state patent document DE10331187B4.Recycling compressor can be provided with herein, i.e., set in recirculating line
Compressor, for the waste gas to be led back to shunting is compressed in scavenging gas high pressure side, entered in turbo-compressor downstream
Scavenging air pressure or charge-air pressure present in air flue.The electronic auxiliary of the compressor set in recirculating line
Driver is supported that the turbine forms low pressure turbocharger together with recycling compressor by turbine herein.Should
Recycling turbine again be branched off by the pressurized air in the booster air compressor downstream of turbocharger, i.e. by turbine
The pressurized air shunting driving of supercharging.Pressurized air shunting is lowered pressure when recycling turbine drives and must quilt
It imported into exhaust duct, does not contribute to combustion chamber supercharging.The gross efficiency of internal combustion engine therefore reduce herein for for
Power used in pressurized air shunting supercharging required for driving recycling turbine, and reduce in electronic auxiliary drive
The power consumed on dynamic device.
The content of the invention
Based on this, it is an object of the present invention to gross efficiency is further improved in the internal combustion engine for starting the type.
The present invention realizes a kind of two-stroke large diesel engine, and it includes：It is at least one by cylinder and with bent axle collective effect
The combustion chamber that limits of piston, the combustion chamber has at least one preferably to be formed between the valve disc of air bleeding valve and the disk seat of matching
, for the exhaust outlet that waste gas is discharged in exhaust duct and it is at least one it is can preferably being controlled by piston, for from air inlet
Road inputs the air inlet of scavenging gas；At least one turbocharger, the turbocharger have the compression in air intake duct
Machine and the turbine in exhaust duct；And branch and guided from exhaust duct or combustion chamber to the recirculating line of air intake duct,
For waste gas shunting is directed back in air intake duct, there is at least one recycling compressor in the recirculating line, so that handle is led
The waste gas shunting returned is pressed into the scavenging air-flow in air intake duct；In order to drive recycling compressor, provided with recycling pressure
The steam turbine that mechanism of qi is coupled in a manner of transmitting torque, steam turbine form transmission mechanism-free with recycling compressor
Steamturbine machine assembly；Steam generator provided with a part of waste gas operation at least through two-stroke large diesel engine, with
Just vaporized working fluid, preferably water；And working fluid conduit is guided to steamturbine including at least one from steam generator
The pressure pipe of machine, so as to which steam is conveyed to the steam turbine coupled with recycling compressor；Steamed in recirculating line
The upstream of steam turbine is provided with the heat exchanger of the waste gas shunting operation by leading back to, as steam generator.
According to the present invention, diesel engine, particularly two-stroke large diesel engine are calmed the anger with having transmission mechanism-free with recycling
The steam turbine that machine couples, for driving recycling compressor.
Advantageously, the loss heat thus always occurred on internal combustion engine can be used for driving recycling compressor.Thus
About 2% diesel engine power can be for example saved in the large-scale two cycle marine diesel engine of the above-mentioned type, otherwise in order to
Driving recycling compressor must apply such diesel engine power.
The waste gas stream come herein from combustion chamber is particularly suitable for the loss heat for tapping out steam generation.Therefore advantageously
Steam generator provided with a part of waste gas operation at least through internal combustion engine.
So can be for example in the waste gas low-pressure side of pressurized air turbocharger stage, steam generator is by exhaust pipe
Flow through, the steam generator is connected via working fluid conduit with steam turbine, the steam turbine and recycling compressor
Couple.
The present invention can be particularly used in such internal combustion engine, wherein, in pressurized air turbocharger or whirlpool
Take turns waste gas recycling on the high-pressure side of booster level.
In such systems particularly advantageously, steam generator is arranged on the upper of steam turbine in recirculating line
Trip.Because the heat energy on the one hand included in waste gas is led back to is not utilized so far.On the other hand even it is expected what cooling was led back to
Waste gas, to be achieved in preferably being pressurized.By extracting heat from the waste gas led back to, thus it is not only not utilized from so far
Source in obtain the driving energy of recycling compressor, and additionally reach the desired cooling for leading back to waste gas.
Steam generator is configured to heat exchanger herein, and heat is extracted from the waste gas led back at the heat exchanger, with
Just heat with superheated working media if necessary, it is often the case that water.
Because lead back to waste gas shunting in there are in order to recycle the steam turbine of compressor driving and sufficiently
Extractible heat, not only steam generator and also driving recycling compressor steam turbine be configured to it is relatively easy
, the rotational speed governor of also steam turbine is also such.It is preferred that recycling compressor transmission mechanism-free and steamturbine
Machine couples and is unified into steamturbine machine assembly.Then steam turbine is necessarily designed to, recycle the rotating speed of compressor
Scope (such as about 7000~15000 revs/min in two-stroke large diesel engine) is equal to the range of speeds of steam turbine.Steam
Therefore steam turbine assembly can also remain transmission mechanism-free herein, because in recycling compressor or being connected thereto
Steam turbine on required for power with steam generator preposition in recirculating line caused by and act on steam
1 is formed between the steam power of turbine:1 relation.
Advantageously, guided herein in order to control steam turbine rotating speed to be provided only with one and be arranged on from steam generator to steaming
Steam throttle valve in the pressure pipe of steam turbine.The steam valve or choke valve or steam throttle valve are used as steamturbine enough
The rotational speed governor of machine.In simplest situation, when the diameter of suitably selected uncontrolled steam throttle valve shrinks, that
Other control element is not needed.But steam throttle valve can be adjustable, make it by operating personnel's hand or via conjunction
Suitable driver can be calibrated or adjusted.In this case can also be individually via uncontrolled or adjustable by operator
The steam throttle valve of section carries out the rotating speed control of steam turbine.
Due to above-mentioned 1:1 relation, it is uncontrolled or by the adjustable steam throttle valve of operator in the case of many foot
Enough enable steam turbine rotating speed control remain it is particularly simple.
It is also contemplated that adjustable steam throttle valve may be used as adjusting in open or closing regulating loop
Whole element, now must also also there are controller measuring cell and adjustment element in other words for steam throttle valve.But at this
The control of steam turbine rotating speed uniquely and can also be guided individually to steam via from steam generator in kind situation
The steam throttle valve set in the pressure pipe of turbine is realized, such as pressure sensing to being arranged in recirculating line end
The pressure sensor signal of device responds.Certainly multiple pressure pipes in parallel between steam generator and steam turbine
In the case of, it may also be envisaged that in each or only multiple steam throttle valves being connected in parallel on some pressure pipes.
In the sense that simple in construction and control is simple advantageously, it is provided with one herein in order to recycle the driving of compressor
It is individual itself and unique steam turbine, the steam turbine do not couple on other drivers, wherein, for recycling
Compressor is also not provided with other parallel drivers.The less electronic auxiliary actuator of only one is used in internal combustion engine
It is favourable to allow recycling compressor start during start-up period, and the auxiliary actuator can be coupled to steamturbine if necessary
On the axle of machine assembly.
It is also contemplated that setting additional drive device, such as generator, it can be coupled with steam turbine；Or
Additional steam consumption device is set, and such as generating set, it can be loaded the steam of surplus, so as to utilize superfluous steam
Can additionally it generate electricity.Sent out it is also contemplated that a part for caused steam is injected into steam via carbon black air blower
On the surface of recirculation pipe trackside in raw device or in the rearmounted pipe section in recirculating line, the surface due to
The harmful substance particle that is included in waste gas is led back to and by attack.
Steam turbine can have geometry that is very simple and thus can cost-effectively manufacturing, such as only have
There are one or two impeller or turbine, because having enough steam can be for its driving in recirculating line by steam generator
Using and thus without big optimization.Steam generator can remain again it is relatively small because only needing few area
For providing for the steam energy required for driving steam turbine.
When aboard ship getting out enough fresh waters-such as seawater-when being used for producing steam, in recycling compressor-steaming
The steam of " consumption " simply it can be discharged into environment on steam turbine.Because in order to avoid pollution working fluid conduit warp
Often need to use the working fluid being insufficient to, such as the fresh water without high content of salt, it is advantageous that, steam generation and steam energy
The consumption of amount be in the range of the cyclic process of thermokinetics, i.e. do not have in the system of closing working fluid loss ground or
Only implement working fluid small loss.Thus advantageously, working fluid conduit is guided to according to flowing from steam turbine
It is arranged on the condenser in downstream and guides therefrom to supply pump, working fluid is liquefied in the condenser, via work
The steam generator that fluid circuit is connected with supply pump is supplied to by the supply pump.
If the heat included in the offgas will more effectively be used in other purposes, for example, for additionally generating electricity or
Person is used for improve being pressurized engine chamber via additional steam-powered booster air compressor, naturally also can be with
Using structural detail relatively expend but more effective.Then steam generator for example can pass through recirculation pipe with guiding
The tube bank on road, the tube bank form a section of working fluid conduit and the waste gas circulation by leading back to.Each pipe of the tube bank
Spirally it can be suspended at this in exhaust path.It is also contemplated that multistage steam generator, it has evaporator with after
The superheater level put, but it is not absolutely required to individually be used for running and recycling the steam turbine that compressor couples.
Pass through the additional air-washer in road is recycled, it is possible to achieve washed from the waste gas led back to carbon black and
Sulphur, so that the discharge of poisonous waste of internal combustion engine reduces.Proposed recycles driving of the compressor via steam turbine
Especially by means of the steam generator set in recirculating line and thus it is specially suitable herein, using leading back to
Steam caused by waste gas itself.Because the gas pressure led back in waste gas is reduce further by gas washer so that recycling
Compressor must be embodied as that correspondingly power is stronger but also power is compared with shortage, and thus energy-saving potential is correspondingly high.
In the steam generator being arranged in recirculating line, herein also advantageously, gas washer is according to flowing relation
It is arranged between the steam generator and recycling compressor cooled down to leading back to waste gas shunting, i.e., positioned at steam generator
Downstream.Because then gas washer can be sized to relative to the gas washer not cooled down in advance in a vapor generator
It may be significantly smaller and thus cost is more favourable, and be in the case of uniform pressure drop in leading back to waste gas shunting.Herein, before
It is applied to for the described content of the controller of steam turbine, steam generator and steam turbine rotating speed：Gas washing fills
Put it is so structured that relatively small and simple, because the expected pressure loss existing for a large amount of, by steam generator due to existing
In recirculating line compensation can be readily derived for the driving recycling available energy of compressor.
If cooling device or cooler are additionally additionally provided with recirculating line, is for example situated between by the use of aqueous water as cooling
The waste heat recovery heat transmitter of matter work, it can also further reduce the temperature of the waste gas led back to so that due under waste gas low temperature
Higher density and thus less volume flow obtains also more favourable volumetric efficiency.If cooler is arranged on according to flowing
Between steam generator and waste gas cleaning device, such waste gas can be cooled down by such degree, enabling realize in gas washer
It is middle to use plastic member or plastic components, thus significantly decrease manufacturing cost and weight and can be realized not in gas washer
Corrosion or the surface only somewhat corroded occurs.
Cooler can be used as preheater simultaneously herein, and the working fluid, i.e. of steam generator is conveyed to for liquid
The water of liquid under normal circumstances.In other words, working fluid can by cooler be heated cooling medium preheating or
Person is itself functioned as cooling medium.
Advantageously, as long as air-washer in recirculating line be present, recycling compressor upstream is provided with drop
Separator, to separate the existing small water droplet due to gas washing in the offgas before compressor is reached.Then small water droplet exists
Separated at the liquid drop separator of outlet side from the volume flow for flow through recirculating line and can be by suitably condensing
Thing outlet discharge.Thus volume flow is further reduced, the volume flow to be increased in the logical porch for being passed through air intake duct
Stress level present in air flue.It is effective to be proved deflecting plate, obturator, silk screen and drilled base plate as liquid drop separator
, they can also be made of plastics due to waste gas cooling.
Brief description of the drawings
Next the preferable form of implementation of the present invention is elaborated by accompanying drawing.
Fig. 1 shows the schematic diagram of the internal combustion engine of the form of implementation according to the present invention.
Embodiment
The main application fields of the present invention are high-power engine, particularly two-stroke large diesel engine, as they can be with
Using as marine drive or applied to power plant.The construction and operation principle of this engine are known per se.
Two-stroke large diesel engine is schematically illustrated in Fig. 1, and it there can be a row cylinder Z.Each cylinder Z and collective effect
Piston K limit a combustion chamber B.In combustion chamber, B upper end is respectively equipped with an air bleeding valve A, by the air bleeding valve, is firing
The waste gas formed during burning is discharged to waste gas and collected in container 15.Waste gas reaches from there through (or multiple) discharge line 12
To the turbine 18 of turbocharger 1.
But a part for waste gas from collect in an illustrated embodiment in waste gas at container 15 but may also be from row
In the air intake duct 11,13,14 for going out at the recirculating line 3 that pipeline 12 branches out to be introduced back into air inlet side or internal combustion engine.Follow again
The upstream that endless tube road 3 can also collect container 15 in waste gas is branched off from exhaust duct 12,15, or by suitably going out
The mouth branch at the B of combustion chamber.
Air intake duct 11,13,14 has the compressor 19 of pressurized air-turbocharger 1 in input side, the compressor via
The exhaust gas driven guided by turbine 18, the pressurized air of input to be increased to the stress level of increasing.Pressurized air
Pipeline 11 is guided to pressurized air from compressor 19 via selectable charger-air cooler 13 collects container 14 or supercharging
In collect air pipe 11, each combustion chamber B is loaded fresh air from the manifold trunk.The waste gas before pressurized air memory 14
Recirculating line 3 is passed through in charge-air pipe 11, and is in the upstream of charger-air cooler 13 or due to recycling
Enough coolings in pipeline 3 and it is preferred that in the downstream of charger-air cooler 13.
Recirculating line 3 guides the steam generator 5 by being configured to heat transmitter in input side herein, is being sealed in opposite side
The guiding of working fluid conduit 4 passes through the steam generator in the circulatory system closed, the liquid to be vaporized in steam generator 5
Working fluid is conveyed to steam generator 5 by the working fluid conduit.In the downstream of steam generator 5, steam turbine 8 passes through
It is connected by the pressure pipeline section of working fluid conduit 4 with steam generator 5, the pressure pipeline section in steam generator 5 by obtaining
Steam pressure driven and itself drive recycling compressor 10, the recycling compressor is located at the defeated of recirculating line 3
Go out side end and be increased to the pressure present in charge-air pipe 11 in the downstream of steam generator 5 and the waste gas led back to
It is horizontal.
Water-the steam circulation being made up of working fluid conduit 4 has condenser 9 in the downstream of steam turbine 8,
In the condenser, the steam-like working fluid that pressure is reduced at steam turbine 8 condenses and then by supply pump
16 are conveyed to steam generator 5 again.Here, supply container can be set between condenser 9 and supply pump 16, condense
Working fluid is collected in the supply container.
Steam turbine 8 and recycling compressor 10 via common axle to transmit the side of torque in this transmission mechanism-free
Formula is connected to each other and forms steamturbine machine assembly 8,10.The rotating speed of steam turbine 8 is herein via working fluid conduit 4
The pressure pipeline section between steam generator 5 and turbine 8 in flow controller 17 or steam throttle valve 17 adjust.
Recirculating line is between the steam generator 5 of input side and the recycling compressor 10 or air blower of outlet side
Gas treatment equipment is first directed through in region, the gas treatment equipment has heat recovery heat exchanger 6 and had downstream
There is air-washer 7.Gas treatment equipment can also have the pre-spray unit of input side, such as one or more is arranged on and followed again
Nozzle in endless tube road 3, the nozzle are loaded the cooling water from water inlet and cooling water are ejected into recirculating line 3
In, thus to realize wet environment in recirculating line 3, this is particularly arranged on pilot injection dress in recirculating line 3
Put in the region in downstream, the regional guidance is by heat recovery heat exchanger 6 and is thus cooled down.In heat recovery heat exchanger 6
Exhaust gas side then exist as wet environment, it forms the anticorrosive protection of liquid on the wall of heat recovery heat exchanger 6
Layer, prevents the adhesion of carbon black or prevents the chemical attack of sulfur granules included in the offgas.Air-washer 7 is advantageously located at herein
The lower section of waste heat recovery heat transmitter 6 so that the cocurrent being ejected into pre-spray unit in recirculating line 3 crosses waste heat recovery heat transfer
The cooling liquid of device 6 and it is flow to by the cooling in waste heat recovery heat transmitter 6 and the liquid condensed from waste gas stream
In gas washer 7.By the cooling of the vapor that always includes in the offgas in waste heat recovery heat transmitter 6 to it is thus related cold
Solidifying (waste gas includes the water until 25 mass % in large-scale diesel engine), realizes the first prerinse of waste gas herein.
In coolant side, heat recovery heat exchanger 6 is flowed through by cold aqueous water, and the water can be advantageously in most of feelings
It is provided in condition and there is heat-transfer capability.Aboard ship use same during internal combustion engine it is contemplated that being loaded for heat recovery heat exchanger 6
Seawater.In addition it is contemplated that as drawn in the accompanying drawings with dotted line, heat recovery heat exchanger 6 is with the work of water-steam circulation
Make fluid to run as cooling medium and thus preheat cooling Jie before the cooling medium is fed to steam generator 5
Matter.
The downstream of air-washer in recirculating line 3 can also selectively be additionally provided with liquid drop separator, i.e. for example
Different deflecting plates or corresponding obturator in waste gas stream path, to isolate the water droplet also included in cold waste gas stream
Thus the waste gas stream is also further dried and finally cleans the waste gas stream.Liquid outlet can also be provided with there.
Waste gas stream that is cold, dry and being cleaned is fed to recycling compressor 10, the recycling compressor now
Positioned at the end of recirculating line 3 and itself is via the caused steam in steam generator 5 or via passing through the steam
The steam turbine 8 of operation is driven.
Steam generator 5 is configured to the pipeline section of recirculating line 3 herein, and pipeline section guiding passes through working fluid conduit
Composition for steam boiler pipeline section.Because liquid is conveyed to the working fluid of steam generator 5 and leads back to the high temperature of waste gas
Degree is poor, can be with smaller in the available area of this convection heat transfer' heat-transfer by convection so that steam generator 5 can be simply formed as double-walled
The form of pipe, waste gas surrounds the working-fluid flow to be evaporated in the double-wall pipe, or in turn.
The variants and modifications of shown form of implementation are all possible, and without departing from the scope of the present invention.
So it is contemplated that steam generator is designed as twin-stage or more level, including one is configured to pipe bundle heat exchanger
Evaporator and one or more superheater levels for being configured to pipe bundle heat exchanger, and in order to using in recycling compressor-whirlpool
Unwanted steam power at machine assembly is taken turns, provided with another pressure for leading to another steam consumption device selectively switched on
Pipeline.
Replacement or supplement as the steam generator 5 set in recirculating line, can also be pressurized in exhaust duct
The downstream of air turbine booster 1 is provided with another steam generator 5a, as drawn in the accompanying drawings with dotted line, so as to complete
Steam pressure required for running recycling compressor-steam turbine 8 fully or partially is provided.
Claims (20)
1. two-stroke large diesel engine,
It includes：It is at least one to pass through cylinder (Z) and the combustion chamber (B) limited with the coefficient piston of bent axle (K), the combustion chamber
With it is at least one be used for waste gas be discharged to exhaust outlet in exhaust duct (12,15) and it is at least one be used for from air intake duct (11,
13rd, the air inlet of scavenging gas 14) is inputted；At least one turbocharger (1), the turbocharger have in air intake duct
Compressor (19) in (11,13,14) and the turbine (18) in exhaust duct (12,15)；And from exhaust duct (12,15) or
Combustion chamber (B) branch and guide to air intake duct (11,13,14) recirculating line (3), for waste gas shunting be directed back into
In air flue (11,13,14), there is at least one recycling compressor (10) in the recirculating line, so as to the waste gas led back to
Shunting is pressed into the scavenging air-flow in air intake duct (11,13,14)；
Characterized in that, in order to drive recycling compressor (10), provided with recycling compressor (10) to transmit the side of torque
The steam turbine (8) that formula couples, the steam turbine (8) form the steam of transmission mechanism-free with recycling compressor (10)
Turbine set is fit；
Steam generator (5) provided with a part of waste gas operation at least through two-stroke large diesel engine, to evaporate work
Fluid；And working fluid conduit (4) includes at least one pressure from steam generator (5) guiding to steam turbine (8)
Pipe, so as to which steam is conveyed to the steam turbine (8) coupled with recycling compressor (10)；
The heat exchanger of the waste gas shunting operation by leading back to is provided with the upstream of steam turbine (8) in recirculating line (3),
As steam generator (5)；
It is used to control steam turbine rotating speed provided with only one steam throttle valve (17), the steam throttle valve is arranged on from steam and sent out
Raw device (5) guiding is into the pressure pipe of steam turbine (8)；
Recirculating line (3) guiding pass through air-washer (7), the air-washer be arranged on the downstream of steam generator (5) with
Recycle the upstream of compressor (10).
2. according to the two-stroke large diesel engine described in claim 1, it is characterised in that：Working fluid conduit (4) is sent out in steam
It is configured to guiding in the region of raw device (5) and passes through the pipeline section of exhaust path or tube bank section；And/or working fluid conduit (4) is steaming
It is configured to steam boiler section in the region of vapour generator (5), the steam boiler section, which surrounds, is configured to flue gas pipeline section or flue gas
Restrain the exhaust path of section.
3. according to the two-stroke large diesel engine described in claim 1, it is characterised in that：The exhaust outlet is in air bleeding valve (A)
Formed between valve disc and the disk seat of matching.
4. according to the two-stroke large diesel engine described in claim 1, it is characterised in that：The air inlet can pass through piston (K)
Control.
5. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：Working fluid conduit (4) from
Steam turbine (8) guiding is to the condenser (9) that downstream is arranged on according to flowing and guides therefrom to supply pump (16), work
Make fluid to be liquefied in the condenser, steam generator (5) is supplied by the supply pump (16), steam hair
Raw device is connected via working fluid conduit (4) with supply pump (16).
6. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：Steam generator is configured to
Multistage, including a First Heat Exchanger section for being used as evaporator and at least one the second heat exchanger area as superheater
Section.
7. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：Steam generator is via energy
The pressure piping branch ended is connected with another steam consumption device that can be selectively switched on, and/or provided with can with transmit turn
The mode of square is coupled to another steam consumption device on steam turbine.
8. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：Steam turbine (8) has
Only one or two stage of turbines.
9. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：It is auxiliary provided with electronic starting
Driver is helped, for the driving recycling compressor (10) during the start-up period of two-stroke large diesel engine.
10. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：Recirculating line (3) draws
Turn on apparatus for supercooling.
11. according to the two-stroke large diesel engine described in claim 10, it is characterised in that：Working fluid conduit (4) is in steam
Guiding passes through cooling device in the region of generator (5) upstream, and working fluid is preheated or itself functioned as cold by cooling medium
But medium.
12. according to the two-stroke large diesel engine described in claim 10, it is characterised in that：The cooling device is arranged on steam
The downstream of generator (5) and the upstream of recycling compressor (10).
13. according to the two-stroke large diesel engine described in claim 10, it is characterised in that：The cooling device is arranged on gas washing
The upstream of device (7).
14. according to the two-stroke large diesel engine described in claim 10, it is characterised in that：There is the cooling device waste heat to return
Receive heat transmitter (6) and/or there is wet bed cooler, the wet bed cooler has the big table towards the waste gas to be directed back
Therefore face, the large surface cooling liquid wetting are simultaneously cold.
15. according to the two-stroke large diesel engine described in claim 14, it is characterised in that：The waste heat recovery heat transmitter (6)
Worked by the use of water as cooling medium.
16. according to the two-stroke large diesel engine described in claim 14, it is characterised in that：The waste heat recovery heat transmitter (6)
Form is cross-flow cooler.
17. according to the two-stroke large diesel engine described in claim 14, it is characterised in that：The large surface form is to be arranged on
Grid, silk screen, plate, rib, obturator and/or diameter change portion in recirculating line.
18. according to the two-stroke large diesel engine described in one of Claims 1-4, it is characterised in that：The working fluid is
Water.
19. according to the two-stroke large diesel engine described in claim 7, it is characterised in that：It is described can selectively switch on it is another
One steam consumption device is generating set.
20. according to the two-stroke large diesel engine described in claim 7, it is characterised in that：It is described can be in a manner of transmitting torque
Another steam consumption device being coupled on steam turbine is generator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012009319.5A DE102012009319B4 (en) | 2012-05-10 | 2012-05-10 | Two-stroke large diesel engine with Rezirkulationsgasverdichter and thus coupled steam turbine |
| DE102012009319.5 | 2012-05-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103388525A CN103388525A (en) | 2013-11-13 |
| CN103388525B true CN103388525B (en) | 2018-03-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310172357.3A Active CN103388525B (en) | 2012-05-10 | 2013-05-10 | Two-stroke large diesel engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6095470B2 (en) |
| KR (2) | KR20130126505A (en) |
| CN (1) | CN103388525B (en) |
| DE (1) | DE102012009319B4 (en) |
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| CN103953470B (en) * | 2014-03-21 | 2016-06-29 | 哈尔滨工程大学 | A kind of supercharged diesel engine air intake duct humidifying device |
| CN104500218B (en) * | 2014-11-26 | 2017-01-11 | 上海交通大学 | System capable of simultaneously improving low-speed working condition performance, high-speed working condition fuel efficiency, NOx emission and transient performance of internal combustion engine |
| JP5778849B1 (en) | 2014-12-22 | 2015-09-16 | 三井造船株式会社 | Power equipment |
| JP6156410B2 (en) | 2015-02-25 | 2017-07-05 | トヨタ自動車株式会社 | Rankine cycle system |
| WO2017041857A1 (en) * | 2015-09-11 | 2017-03-16 | Volvo Truck Corporation | Exhaust gas recirculation arrangement |
| DE102016200567A1 (en) * | 2016-01-18 | 2017-07-20 | Mahle International Gmbh | Engine system |
| KR102463697B1 (en) * | 2016-12-14 | 2022-11-07 | 현대자동차주식회사 | Vehicle heat exchanger |
| FR3064300A1 (en) * | 2017-03-23 | 2018-09-28 | New Times | TWO-TIME EXPLOSION ENGINE |
| US10995657B2 (en) * | 2017-12-20 | 2021-05-04 | John Manley McDonald | Externally powered turbine for an internal combustion engine |
| AT522176B1 (en) * | 2019-07-23 | 2020-09-15 | Avl List Gmbh | METHOD OF OPERATING A COMBUSTION ENGINE |
| DE102019122643A1 (en) * | 2019-08-22 | 2021-02-25 | Man Energy Solutions Se | Exhaust gas recirculation fan and internal combustion engine |
| CN113864040B (en) * | 2021-09-24 | 2022-12-06 | 中船动力研究院有限公司 | Pressure regulating system for low-load air suction of two-stroke diesel engine and ship |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103388525A (en) | 2013-11-13 |
| DE102012009319A1 (en) | 2013-11-14 |
| JP2013234662A (en) | 2013-11-21 |
| KR20170028912A (en) | 2017-03-14 |
| DE102012009319B4 (en) | 2018-11-08 |
| JP6095470B2 (en) | 2017-03-15 |
| KR101793460B1 (en) | 2017-11-03 |
| KR20130126505A (en) | 2013-11-20 |
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