CN104121072A - 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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- CN104121072A CN104121072A CN201410374452.6A CN201410374452A CN104121072A CN 104121072 A CN104121072 A CN 104121072A CN 201410374452 A CN201410374452 A CN 201410374452A CN 104121072 A CN104121072 A CN 104121072A
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- waste gas
- flow control
- diesel engine
- wash water
- sox
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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 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
What the present invention relates to is a kind of marine exhaust pollutant emission control gear, is specifically related to as meeting associating NO_x removal and the Sox device of the boats and ships two stroke diesel engine of International Maritime Organization (IMO) marine exhaust pollutant emission rules.
Background technique
For reducing vessel operating cost, merchant navy vessel is all used high-sulfur heavy oil, and the NOx that engine combustion produces and SOx produce serious harm to marine atmosphere and harbour environment.
IMO has carried out strict restriction to the NOx in engine of boat and ship waste gas and SOx discharge.
At present, conventional NOx reduction of discharging measure mainly comprises reduction of discharging measure and the outer reduction of discharging measure of machine in machine.In machine, reduction of discharging measure is by certain method, such as after injection, improvement fuel injection characteristic, the intake temperature that reduces, increase ambient humidity etc. in cylinder, changes in-cylinder combustion, reduces the interior NOx of cylinder to generate, and finally reduces motor NOx to discharge; Machine reduces discharging NOx measure outward, is mainly SCR post-processing technology (selective catalytic reduction), utilizes the NOx in reducing agent reduction Diesel Engine Exhaust Pipe, makes it to become harmless N
2, finally reduced motor NOx discharge.Comparatively speaking, in above-mentioned machine, reduction of discharging measure ratio is easier to realize, but emission reduction effect is limited.Machine reduces discharging SCR technology outward, and emission reduction effect is good, can meet the NOx emission request of IMO, but after-treatment device is bulky, has reduced the useful space of boats and ships, and the operation and maintenance cost of SCR is also higher simultaneously.
Boats and ships SOx emission-reduction technology, mainly comprises two kinds of employing Low Sulfur Fuel Oil and waste gas washing technologies.Comparatively speaking, employing Low Sulfur Fuel Oil is more convenient, to boats and ships, change relatively little, can meet the requirement of IMO to boats and ships SOx discharge, but price difference is huge between high Low Sulfur Fuel Oil, use Low Sulfur Fuel Oil cost too high, available engine is used Low Sulfur Fuel Oil to have the problems such as viscosity is too low, poor lubricity, easy wearing and tearing simultaneously, motor is had to certain infringement, and Low Sulfur Fuel Oil can produce a large amount of CO in refining process
2, aggravation Global Greenhouse Effect.Using waste gas washing is a kind of effective ways of removing SOx in waste gas, and boats and ships still can use heavy oil at a low price, but wash mill also exists volume larger, and operation and maintenance needs the problem of certain expense.
At present, to the research of marine exhaust NOx, SOx and processing, be all separately to carry out separately, use two cover distinct devices, respectively NOx and SOx are processed.This waste gas series connection processing method, equipment volume is huge, back pressure is high, larger on engine work impact, and equipment investment and operating cost very high.
Up to now, there is no the device that an energy carries out integrated treatment to the NOx of boats and ships two stroke diesel engine discharge and SOx both at home and abroad, make meeting on the basis of IMO NOx and SOx emission request, reduction emission reduction device volume and cost, and reduce the impact of emission abatement device on vessel operating expenditures and the useful space.
Summary of the invention
The object of the present invention is to provide and a kind ofly can effectively improve engine combustion situation, reduce in-cylinder combustion temperature, the NOx that reduces diesel engine generates and removes the SO in waste gas
x, realize and reduce NOx and the SO in engine exhaust simultaneously
xthe exhaust emission for two stroke diesel engine combine and remove device.
The object of the present invention is achieved like this:
Comprise exhaust gas scrubber A and EGR gas flow control device B, described exhaust gas scrubber A comprises washing machine 4, wash water storing box 9, recycle pump 10, SOx absorbing agent supplier 11 and fresh water supplier 12, described EGR gas flow control device B comprises flow control valve 5, recirculating fan 6 and one-way control valve 7
The waste gas of two stroke diesel engine 1 discharge enters gas exhaust piping after turbine 2 actings, by three-way valve 3, enters exhaust gas scrubber A, in scrubber tower 4, carry out washing desulphurization, waste gas after washing passes through the built-in demister of scrubber tower again, removes after the water droplet being wherein mixed with, and discharges scrubber tower;
Wash the wash water of waste gas, entered wash water storing box 9, by SOx absorbing agent supplier 11 and fresh water supplier 12, supplemented respectively absorbing agent and fresh water simultaneously;
Wash water in wash water storing box 9, through recycle pump 10 pressurizations, enters scrubber tower 4 again;
The waste gas of discharging scrubber tower, is divided into two-way, and a road directly enters atmosphere, and another road enters EGR gas flow control device B;
Enter the waste gas of EGR gas flow control device B, by flow control valve 5, regulate its flow, after recirculating fan 6 pressurizations, through one-way valve, control 7, in pressurized machine 8 ingress, mix with fresh air, after pressurized machine 8 compression superchargings, enter cylinder and participate in combustion reaction.
Wash water in wash water storing box 9 is carried out to Real-Time Monitoring, and when absorbing SOx scarce capacity, extraction part wash water enters Waste Water Treatment 13 and processes.
The present invention proposes a kind of exhaust emission combined removal device for two stroke diesel engine, compared with prior art have following advantage:
A. waste gas, before entering EGR gas flow control device B, through washing machine, demister, is removed the SO in waste gas
xwith most of particle, waste gas is purified, has reduced and entered pressurized machine and the airborne granule content of cylinder, avoided the wearing and tearing of pressurized machine and motor, significantly improved combustion condition, diesel powered, economic performance and emission performance are all significantly improved simultaneously.
B. waste gas is after washing, and temperature is minimized, and has increased the air inflow of motor, can guarantee engine power.
C. after demister, in low temperature waste gas, contain CO
2and water vapour, recirculation enters after motor, has increased the CO in working medium in cylinder
2and water vapour content, reduced oxygen concentration in cylinder, improved the specific heat of working medium in cylinder, reduce combustion temperature, and then reduced NO
xgrowing amount.
D. owing to using a covering device to remove NOx and the SOx in engine exhaust simultaneously, the volume and weight of device will be significantly less than the volume and weight sum of the device that carries out respectively desulfurization and denitration, and operation and maintenance cost is also much smaller.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the exhaust emission combined removal device for two stroke diesel engine of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail.
In conjunction with Fig. 1, the exhaust emission for two stroke diesel engine of the present invention is combined the main city that removes device and is comprised exhaust gas scrubber A and EGR gas flow control device B.Exhaust gas scrubber A comprises washing machine 4, wash water storing box 9, recycle pump 10, SOx absorbing agent supplier 11 and fresh water supplier 12; EGR gas flow control device B comprises flow control valve 5, recirculating fan 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 actings, by three-way valve 3, enter exhaust gas scrubber A, in scrubber tower 4, carry out washing desulphurization, SOx and the most of particle in waste gas removed in washing, waste gas after washing passes through the built-in demister of scrubber tower again, removes after the water droplet being wherein mixed with, and discharges scrubber tower;
B. wash the wash water of waste gas, entered wash water storing box 9, by SOx absorbing agent supplier 11 and fresh water supplier 12, supplemented respectively absorbing agent and fresh water simultaneously;
C. the wash water in wash water storing box 9, through recycle pump 10 pressurizations, enters scrubber tower 4 again;
D. for guaranteeing the washing effect of wash water, the wash water in wash water storing box 9 is carried out to Real-Time Monitoring, when absorbing SOx scarce capacity, extraction part wash water enters Waste Water Treatment 13 and processes;
The waste gas of e. discharging scrubber tower, is divided into two-way, and a road directly enters atmosphere, and another road enters EGR gas flow control device B;
F. enter the waste gas of EGR gas flow control device B pipeline, according to engine operating condition, by flow control valve 5, regulate its flow, after recirculating fan 6 pressurizations, through one-way valve, control 7, in pressurized machine 8 ingress, mix with fresh air, after pressurized machine 8 compression superchargings, enter cylinder and participate in combustion reaction.
The working procedure of device of the present invention is: the waste gas of two stroke diesel engine 1 is from turbine 2 is discharged, and waste gas enters exhaust gas scrubber A through gas exhaust piping by three-way valve 3 and washs.Low temperature waste gas after washing is divided into two-way, and a road directly enters atmosphere, and another road enters EGR gas flow control device B.The clean exhaust gas flow of recirculation is controlled according to engine operating condition by flow control valve 5, the flow control valve 5 of flowing through successively, EGR blower fan 6 and one-way control valve 7.Low temperature " clean " exhaust gas after pressurization mixes with fresh air at pressurized machine admission line, enters pressurized machine 8, then enters two stroke diesel engine 1 and participates in combustion reaction.Wash water after washing, enters wash water storing box 9, by SOx absorbing agent supplier 11 and fresh water supplier 12, supplements respectively absorbing agent and fresh water.Wash water in wash water storing box 9 pressurizes through recycle pump, circulation enters scrubber tower 4 for guaranteeing the assimilation effect of wash water, wash water in wash water storing box 9 is carried out to Real-Time Monitoring, and when absorptivity is not enough, extraction part wash water enters Waste Water Treatment 13 and processes.
Present embodiment combines waste gas washing and EGR, realizes boats and ships two stroke diesel engine NO_x removal and SOx simultaneously.The waste gas that diesel engine 1 is discharged is through washing, and eccysis SOx and particle wherein, through demister dehydration, makes SOx in waste gas reach IMO emission regulation demands.Part waste gas after washing, through EGR gas flow control device B, is introduced pressurized machine 8, enters cylinder participate in combustion reaction with fresh air after mixing.According to engine operating condition, by flow regulator 5, adjust the low temperature " clean " exhaust gas amount that participates in recirculation, assurance can make motor NOx discharge meet IMO requirement, and makes diesel engine performance in acceptable scope.Demister is further processed waste gas, removes the water droplet wherein carrying, and prevents the corrosion of diesel engine intake and exhaust port and avoids water droplet to enter cylinder, destroys cylinder sleeve oil film.Waste gas after washing, its temperature is down to below 60 ℃, can guarantee the air inflow of diesel engine during recirculation.When desulfuring and denitrifying apparatus keeps in repair and breaks down, engine exhaust can be bypassed to atmosphere.Prevent that fresh air from entering EGR gas flow control device B; When EGR gas flow control device B safeguards and breaks down, disconnect EGR gas flow control device B and be connected with the pipeline between pressurized machine 8 simultaneously.
Claims (2)
1. the exhaust emission for two stroke diesel engine is combined and is removed device, it is characterized in that: comprise exhaust gas scrubber (A) and EGR gas flow control device (B), described exhaust gas scrubber (A) comprises washing machine (4), wash water storing box (9), recycle pump (10), SOx absorbing agent supplier (11) and fresh water supplier (12), and described EGR gas flow control device (B) comprises flow control valve (5), recirculating fan (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), enter exhaust gas scrubber (A), in scrubber tower (4), carry out washing desulphurization, waste gas after washing passes through the built-in demister of scrubber tower again, remove after the water droplet being wherein mixed with, discharge scrubber tower;
Wash the wash water of waste gas, entered wash water storing box (9), by SOx absorbing agent supplier (11) and fresh water supplier (12), supplemented respectively absorbing agent and fresh water simultaneously;
Wash water in wash water storing box (9), through recycle pump (10) pressurization, enters scrubber tower (4) again;
The waste gas of discharging scrubber tower, is divided into two-way, and a road directly enters atmosphere, and another road enters EGR gas flow control device (B);
Enter the waste gas of EGR gas flow control device (B), by flow control valve (5), regulate its flow, after recirculating fan (6) pressurization, through one-way valve, control (7), in pressurized machine (8) ingress, mix with fresh air, after pressurized machine (8) compression supercharging, enter cylinder and participate in combustion reaction.
2. the exhaust emission for two stroke diesel engine according to claim 1 is combined and is removed device, it is characterized in that: the wash water in wash water storing box (9) is carried out to Real-Time Monitoring, when absorbing SOx scarce capacity, extraction part wash water enters Waste Water Treatment (13) and processes.
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| 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 |
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| 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 |
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| CN104121072A true CN104121072A (en) | 2014-10-29 |
| CN104121072B CN104121072B (en) | 2017-01-18 |
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Cited By (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 |
| CN112585344A (en) * | 2018-08-23 | 2021-03-30 | 沃尔沃卡车集团 | 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 |
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| JP2002332919A (en) * | 2001-02-26 | 2002-11-22 | Mitsubishi Heavy Ind Ltd | Exhaust gas recirculation system |
| CN101424216A (en) * | 2007-10-30 | 2009-05-06 | 通用电气公司 | System zur ruckfuhrung von abgas einer gasturbine |
| CN102140978A (en) * | 2010-01-29 | 2011-08-03 | 曼恩柴油机涡轮公司,曼恩柴油机涡轮德国公司子公司 | Large two-stroke diesel engine with exhaust gas recirculation system |
| CN103388514A (en) * | 2012-05-10 | 2013-11-13 | 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 | Internal combustion engine |
| EP2711067A1 (en) * | 2012-09-25 | 2014-03-26 | Alfa Laval Corporate AB | Combined cleaning system and method for reduction of SOx and NOx in exhaust gases from a combustion engine |
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2014
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Patent Citations (5)
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| JP2002332919A (en) * | 2001-02-26 | 2002-11-22 | Mitsubishi Heavy Ind Ltd | Exhaust gas recirculation system |
| CN101424216A (en) * | 2007-10-30 | 2009-05-06 | 通用电气公司 | System zur ruckfuhrung von abgas einer gasturbine |
| CN102140978A (en) * | 2010-01-29 | 2011-08-03 | 曼恩柴油机涡轮公司,曼恩柴油机涡轮德国公司子公司 | Large two-stroke diesel engine with exhaust gas recirculation system |
| CN103388514A (en) * | 2012-05-10 | 2013-11-13 | 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 | Internal combustion engine |
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Cited By (5)
| 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 |
| CN112585344A (en) * | 2018-08-23 | 2021-03-30 | 沃尔沃卡车集团 | Method for operating an internal combustion engine system |
| US11339731B2 (en) | 2018-08-23 | 2022-05-24 | Volvo Truck Corporation | Method for operating an internal combustion engine system |
| CN112585344B (en) * | 2018-08-23 | 2022-10-04 | 沃尔沃卡车集团 | 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 |
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| CN104121072B (en) | 2017-01-18 |
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