CN104121072B - Waste gas pollutant combined removal device for two-stroke diesel engine - Google Patents
Waste gas pollutant combined removal device for two-stroke diesel engine Download PDFInfo
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- CN104121072B CN104121072B CN201410374452.6A CN201410374452A CN104121072B CN 104121072 B CN104121072 B CN 104121072B CN 201410374452 A CN201410374452 A CN 201410374452A CN 104121072 B CN104121072 B CN 104121072B
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- waste gas
- cleaning mixture
- diesel engine
- sox
- gas
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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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- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a waste gas pollutant combined removal device for a two-stroke diesel engine. The waste gas pollutant combined removal device comprises a waste gas washing device and a recirculation waste gas flow control device, the waste gas washing device comprises a washer, a washing solution storage box, a circulation pump, a SOx absorbing agent supply device and a fresh waste supply device, and the recirculation waste gas flow control device comprises a flow regulating valve, a recirculating draught fan and a one-way control valve. According to the waste gas pollutant combined removal device, waste gas of the two-stroke diesel engine is washed, the SOx content and the particle content in the waste gas are reduced, part of low-temperature clean waste gas is recirculated, the NOx generation amount of the engine is reduced, and combined desulfurization and denitration of waste gas pollutants of the ship diesel engine is achieved. According to the waste gas pollutant combined removal device, part of washed waste gas is recirculated, the combustion condition in a cylinder is improved to a large extent,by CO2 and vapor contained in the low-temperature clean waste gas and the NOx generation amount and the final discharge amount of the engine are reduced.
Description
Technical field
The present invention relates to a kind of marine exhaust pollutant emission control device is and in particular to for meeting International Maritime
Combining of the ship two stroke diesel engine of tissue (imo) marine exhaust pollutant emission regulation removes nox and sox device.
Background technology
For reducing vessel operating cost, merchant navy vessel all using high-sulfur heavy oil, produce nox and sox pair of engine combustion
Marine atmosphere and harbour environment produce serious harm.
Imo has carried out strict restriction to nox the and sox discharge in engine of boat and ship waste gas.
At present, conventional nox Mitigation options mainly include Mitigation options and the outer Mitigation options of machine in machine.Mitigation options in machine
It is by certain method, such as in cylinder, after injection, improvement fuel injection characteristic, the intake air temperature that reduces, increase ambient humidity etc., change
Become in-cylinder combustion, reduce nox in cylinder and generate, final minimizing electromotor nox discharge；Nox measure is reduced discharging, after mainly scr outside machine
Treatment technology (SCR), reduces the nox in Diesel Engine Exhaust Pipe using reducing agent, is allowed to be changed into harmless n2,
Finally decrease electromotor nox discharge.Comparatively, in above-mentioned machine, Mitigation options are easier to realize, but emission reduction effect is limited.
Scr technology is reduced discharging, emission reduction effect is good, can meet the nox emission request of imo, but after-treatment device is bulky, decreases outside machine
The useful space of ship, the operation of scr and maintenance cost are also higher simultaneously.
Ship sox emission-reduction technology, is mainly included using Low Sulfur Fuel Oil and two kinds of flue gas scrubbing technology.Comparatively, adopt
Low Sulfur Fuel Oil is more convenient, ship is changed relatively small, can meet the requirement that imo discharges to ship sox, but the combustion of high low-sulfur
Oil between price difference huge, too high using Low Sulfur Fuel Oil cost, simultaneously available engine using Low Sulfur Fuel Oil exist viscosity too low, profit
Slip is poor, the problems such as easily wear and tear, have certain infringement to electromotor, and Low Sulfur Fuel Oil can produce in refining process substantial amounts of
co2, aggravate Global Greenhouse Effect.The use of waste gas washing is a kind of effective ways removing sox in waste gas, ship still can use low
Valency heavy oil, but wash mill there is also that volume is larger, runs and safeguards the problem needing certain expense.
At present, the research to marine exhaust nox, sox and process, is all separately individually to carry out, using two sets of distinct devices,
Respectively to nox and sox process.This waste gas series connection processing method, equipment volume is huge, and back pressure is high, normal to electromotor
Work influence is larger, and equipment investment and operating cost very high.
So far, there is no one nox and sox of ship two stroke diesel engine discharge can be carried out at integration both at home and abroad
The device of reason, makes, on the basis of meeting imo nox and sox emission request, to reduce emission reduction device volume and cost, and reduce
The impact to vessel operating expenditures and the useful space for row's equipment.
Content of the invention
It is an object of the invention to provide one kind can improve engine firing condition effectively, reduce in-cylinder combustion temperature,
The nox reducing diesel engine generates and removes so in removing exhaust gasx, realize reducing nox and so in engine exhaust simultaneouslyxBe used for
The exhaust emission joint removing means of two stroke diesel engine.
The object of the present invention is achieved like this:
Including exhaust gas scrubber a and EGR gas volume control device b, described exhaust gas scrubber a includes washing
Device 4, cleaning mixture storing box 9, circulating pump 10, sox absorb agent feeding device 11 and fresh water feedway 12, described EGR gas
Volume control device b includes flow control valve 5, recirculation blower 6 and one-way control valve 7,
The waste gas of two stroke diesel engine 1 discharge enters gas exhaust piping after turbine 2 acting, by three-way valve 3, enters waste gas
Wash mill a, carries out washing desulphurization in scrubbing tower 4, and the waste gas after washing through the demister that scrubbing tower is built-in, removes it again
In after the water droplet that is mixed with, discharge scrubbing tower；
The cleaning mixture of washed waste gas, enters cleaning mixture storing box 9, absorbs agent feeding device 11 and fresh water by sox simultaneously
Feedway 12 supplements absorbent and fresh water respectively；
Cleaning mixture in cleaning mixture storing box 9 pressurizes through circulating pump 10, is again introduced into scrubbing tower 4；
Discharge the waste gas of scrubbing tower, be divided into two-way, a road is directly discharged into air, another road enters EGR gas flow control
Device b processed；
Enter the waste gas of EGR gas volume control device b, its flow, recycled wind are adjusted by flow control valve 5
After machine 6 pressurization, control 7 through check valve, mix with fresh air in supercharger 8 porch, enter after intensified device 8 compression supercharging
Cylinder participates in combustion reaction.
Real-time monitoring is carried out to the cleaning mixture in cleaning mixture storing box 9, when absorbing sox scarce capacity, extraction part is washed
Wash liquid entrance Waste Water Treatment 13 to be processed.
The present invention proposes a kind of exhaust emission combined removal device for two stroke diesel engine, with prior art phase
Ratio has the advantage that
A., before entering EGR gas volume control device b, scrubbed device, demister, in removing waste gas for waste gas
soxWith most of granule, so that waste gas is purified, decrease the granule content entering supercharger and cylinder in the air, it is to avoid
Supercharger and the abrasion of electromotor, significantly improve burning condition simultaneously, make diesel powered, economic performance and discharge performance all
It is significantly improved.
B. after waste gas is scrubbed, temperature is minimized, and increased the air inflow of electromotor it is ensured that engine power.
C., after demister, in low temperature waste gas, contain co2And vapor, after being re-circulated into electromotor, increased in cylinder
Co in working medium2And water vapour content, decrease oxygen concentration in cylinder, improve the specific heat of working medium in cylinder, reduce ignition temperature,
And then reduce noxGrowing amount.
D. due to removing nox and sox in engine exhaust using set of device simultaneously, the volume and weight of device is bright
Show less than the volume and weight sum carrying out the device of desulfurization and denitration respectively, operation and maintenance cost is also much smaller.
Brief description
Fig. 1 is the schematic diagram of the exhaust emission combined removal device for two stroke diesel engine of the present invention.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail.
In conjunction with Fig. 1, the main city of the exhaust emission joint removing means for two stroke diesel engine of the present invention includes giving up
Gas washing device a and EGR gas volume control device b.Exhaust gas scrubber a includes scrubber 4, cleaning mixture storing box
9th, circulating pump 10, sox absorb agent feeding device 11 and fresh water feedway 12；EGR gas volume control device b includes flowing
Adjustable valve 5, recirculation blower 6 and one-way control valve 7.
A. the waste gas of two stroke diesel engine 1 discharge enters gas exhaust piping after turbine 2 acting, by three-way valve 3, enters useless
Gas washing device a, carries out washing desulphurization in scrubbing tower 4, and washing removes sox and most of granule in waste gas, after washing
Waste gas, again through the demister that scrubbing tower is built-in, after removing the water droplet being wherein mixed with, discharges scrubbing tower；
B. the cleaning mixture of washed waste gas, enters cleaning mixture storing box 9, absorbs agent feeding device 11 and light by sox simultaneously
Water feeder 12 supplements absorbent and fresh water respectively；
C. the cleaning mixture in cleaning mixture storing box 9 pressurizes through circulating pump 10, is again introduced into scrubbing tower 4；
D. it is the clean result ensureing cleaning mixture, real-time monitoring is carried out to the cleaning mixture in cleaning mixture storing box 9, works as absorption
During sox scarce capacity, extract part cleaning mixture entrance Waste Water Treatment 13 and processed；
E. discharge the waste gas of scrubbing tower, be divided into two-way, a road is directly discharged into air, another road enters EGR gas flow
Control device b；
F. enter the waste gas of EGR gas volume control device b pipeline, according to engine operating condition, by flow control valve 5
Adjust its flow, after recycled blower fan 6 pressurization, control 7 through check valve, mix with fresh air in supercharger 8 porch, warp
Enter cylinder after supercharger 8 compression supercharging and participate in combustion reaction.
The work process of assembly of the invention is:, after turbine 2 discharge, waste gas is through aerofluxuss for the waste gas of two stroke diesel engine 1
Pipeline enters exhaust gas scrubber a by three-way valve 3 and is washed.Low temperature waste gas after washing are divided into two-way, and a road is directly discharged into
Air, another road enters EGR gas volume control device b.The net exhaust gas flow of recirculation by flow control valve 5 according to send out
Motivation operating conditions, flow through flow control valve 5, egr blower fan 6 and one-way control valve 7 successively.Low temperature " clean " exhaust gas after pressurization exist
Supercharger admission line mixes with fresh air, enters supercharger 8, participates in combustion reaction subsequently into two stroke diesel engine 1.Wash
Cleaning mixture after washing, enters cleaning mixture storing box 9, absorbs agent feeding device 11 by sox and fresh water feedway 12 supplements respectively
Absorbent and fresh water.Cleaning mixture in cleaning mixture storing box 9 pressurizes through circulating pump, and being recycled into scrubbing tower 4 is to ensure cleaning mixture
Assimilation effect, real-time monitoring is carried out to the cleaning mixture in cleaning mixture storing box 9, when absorbability is not enough, extraction part is washed
Wash liquid entrance Waste Water Treatment 13 to be processed.
Waste gas washing and waste gas recirculation are combined by present embodiment, realize ship two stroke diesel engine and remove simultaneously
Nox and sox.The waste gas that diesel engine 1 is discharged, through washing, eccysis sox therein and granule, through demister dehydration, makes in waste gas
Sox reaches imo emission regulation demands.Portion after washing recycled exhaust gas flow control device b, introduces supercharger 8,
Enter cylinder after mixing with fresh air and participate in combustion reaction.According to engine operating condition, participation is adjusted by flow regulator 5 and follows again
The low temperature " clean " exhaust gas amount of ring requires it is ensured that electromotor nox discharge can be made to meet imo, and so that diesel engine performance is being subjected to
Scope.Demister is processed further to waste gas, removes the water droplet that wherein carries, prevent diesel engine entering and exhaust channel corrosion and
Avoid water droplet to enter cylinder, destroy cylinder sleeve oil film.Waste gas after scrubbed, its temperature is down to less than 60 DEG C, permissible during recirculation
Ensure the air inflow of diesel engine.When desulfuring and denitrifying apparatus keep in repair and break down, engine exhaust can be bypassed to air.Anti-
Only fresh air enters EGR gas volume control device b；Simultaneously when EGR gas volume control device b safeguards and occurs
During fault, disconnect EGR gas volume control device b and be connected with the pipeline between supercharger 8.
Claims (1)
1. a kind of exhaust emission joint removing means for two stroke diesel engine, is characterized in that: include exhaust gas scrubber
A () and EGR gas volume control device (b), described exhaust gas scrubber (a) includes scrubbing tower (4), cleaning mixture storing box
(9), circulating pump (10), sox absorb agent feeding device (11) and fresh water feedway (12), and described EGR gas flow controls
Device (b) includes flow control valve (5), recirculation blower (6) and one-way control valve (7)；
The waste gas that two stroke diesel engine (1) discharges enters gas exhaust piping after turbine (2) acting, by three-way valve (3), enters useless
Gas washing device (a), carries out washing desulphurization in scrubbing tower (4), the waste gas after washing again through the demister that scrubbing tower is built-in,
After removing the water droplet being wherein mixed with, discharge scrubbing tower；
The cleaning mixture of washed waste gas, enters cleaning mixture storing box (9), absorbs agent feeding device (11) and fresh water by sox simultaneously
Feedway (12) supplements absorbent and fresh water respectively；
Cleaning mixture in cleaning mixture storing box (9) pressurizes through circulating pump (10), is again introduced into scrubbing tower (4)；
Discharge the waste gas of scrubbing tower, be divided into two-way, a road is directly discharged into air, another road enters EGR gas flow and controls dress
Put (b)；
Enter the waste gas of EGR gas volume control device (b), its flow, recycled wind are adjusted by flow control valve (5)
After machine (6) pressurization, through one-way control valve (7), mix with fresh air in supercharger (8) porch, intensified device (8) compression increases
Enter cylinder after pressure and participate in combustion reaction；
Real-time monitoring is carried out to the cleaning mixture in cleaning mixture storing box (9), when absorbing sox scarce capacity, extracts portion washes
Liquid enters Waste Water Treatment (13) and is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374452.6A CN104121072B (en) | 2014-08-01 | 2014-08-01 | Waste gas pollutant combined removal device for two-stroke diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374452.6A CN104121072B (en) | 2014-08-01 | 2014-08-01 | Waste gas pollutant combined removal device for two-stroke diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104121072A CN104121072A (en) | 2014-10-29 |
| CN104121072B true CN104121072B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410374452.6A Active CN104121072B (en) | 2014-08-01 | 2014-08-01 | Waste gas pollutant combined removal device for two-stroke diesel engine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289241A (en) * | 2015-09-24 | 2016-02-03 | 哈尔滨工程大学 | Combined desulphurization and denitration device and method of marine diesel engine |
| US11339731B2 (en) | 2018-08-23 | 2022-05-24 | Volvo Truck Corporation | Method for operating an internal combustion engine system |
| CN112682226A (en) * | 2020-12-21 | 2021-04-20 | 中国北方发动机研究所(天津) | Combined pollutant emission reduction system for dual-fuel marine diesel engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002332919A (en) * | 2001-02-26 | 2002-11-22 | Mitsubishi Heavy Ind Ltd | Exhaust gas recirculation system |
| US7861511B2 (en) * | 2007-10-30 | 2011-01-04 | General Electric Company | System for recirculating the exhaust of a turbomachine |
| JP4997336B2 (en) * | 2010-01-29 | 2012-08-08 | エムエーエヌ・ディーゼル・アンド・ターボ・フィリアル・アフ・エムエーエヌ・ディーゼル・アンド・ターボ・エスイー・ティスクランド | Large two-cycle diesel engine with exhaust gas recirculation system |
| DE102012009314B4 (en) * | 2012-05-10 | 2020-01-30 | Man Diesel & Turbo, Filial Af Man Diesel & Turbo Se, Tyskland | internal combustion engine |
| NO2711067T3 (en) * | 2012-09-25 | 2018-07-28 |
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