CN105257369A - Tail gas treating device and method for large diesel engine - Google Patents
Tail gas treating device and method for large diesel engine Download PDFInfo
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- CN105257369A CN105257369A CN201510700703.XA CN201510700703A CN105257369A CN 105257369 A CN105257369 A CN 105257369A CN 201510700703 A CN201510700703 A CN 201510700703A CN 105257369 A CN105257369 A CN 105257369A
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- tail gas
- gas
- particle separator
- solid particle
- particle
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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 invention discloses a tail gas treating device and method for a large diesel engine. The tail gas treating device comprises a tail gas treatment tank connected to the tail gas outlet end of an air cylinder, and a stirling electric generator and a particle separator are sequentially connected with the interior of the tail gas treatment tank through pipes. An EGR system is further connected to the pipe arranged between the stirling electric generator and the particle separator, and the EGR system feeds a part of tail gas back to the gas inlet end of the air cylinder through an EGR circulation loop. The stirling electric generator, the EGR system and the particle separator are integrated into one tail gas treating tank, can be independently controlled, can be adjusted according to the practical condition of the tail gas, have good independence and can be disassembled and maintained respectively. In addition, hazardous substances generated after the tail gas is treated are collected in a unified manner through the tail gas treatment tank, and maintaining such as concentrated cleaning and matter removing is carried out on the tail gas treatment tank at certain intervals. The tail gas treatment tank is connected with a gas discharging opening of the diesel engine through the pipe, and the whole operability is achieved.
Description
Technical field
The present invention relates to the purified treatment field of diesel engine vent gas, particularly relate to a kind of exhaust gas processing device and method thereof of large-scale diesel engine.
Background technique
In recent years, diesel engine was large with its power, efficiency is high and be widely used, and especially in navigation ship field, be the development of human society, huge contribution has been made in the progress of seafaring.Compared to petrol engine, diesel fuel burns in the tail gas that produces containing the harmful components such as more solid particle and NOx.At present, in common exhaust emissions of diesel engine treatment technology, normally tail gas is directly disposed in air after simple purified treatment, harmful gas composition in air constantly increases, solid particle PM also becomes and newly pollutes the one that environment works the mischief now, not only to environmental danger, waste energy, simultaneously also threatened the health of the mankind.
At present, the processing method for exhaust pollution of diesel engines is mainly divided into process and off engine control technology in machine.In machine, process mainly processes fuel, makes fuel more Thorough combustion, as spray technique.Off engine control technology is then mainly processed, as EGR, SCR, WHR etc. by the tail gas of some technological means to discharge.In diesel engine system, often use a certain technological means to process, can not thoroughly remove the harmful components in tail gas; Meanwhile, the general and diesel engine system for the treatment of device supports the use, and in versatility, degree is not high, and treatment technology also haves much room for improvement.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, a kind of exhaust gas processing device and method thereof of large-scale diesel engine are provided.Can process the waste heat in tail gas, NOx, solid particle etc. respectively, waste gas is after treatment disposed in air again.
The present invention is achieved through the following technical solutions:
An exhaust gas processing device for large-scale diesel engine, comprises the vent gas treatment case being connected to cylinder tail gas outlet end, connects stirling generator and particle separator successively in described vent gas treatment case by pipeline; Pipeline between stirling generator and particle separator is also connected with an egr system, partial tail gas is fed back to the inlet end of cylinder by egr system again by EGR circulation loop.
Described particle separator comprises for the solid particle centrifuge of gas solid separation and the metal filter screen for collecting solid particle; By the rotation blade generation centrifugal force of solid particle centrifuge, the solid particle carried in gas is carried out two to be separated, solid particle is got rid of to the metal filtration on the tube wall being arranged on particle separator online, and solid particle is by metal filter screen absorption, collection.
A kind of exhaust gas treating method of large-scale diesel engine is as follows:
Pass into the combination of pure oxygen and inert gas at cylinder air inlet place, and condition regulates the concentration of oxygen as required;
Tail gas in cylinder is entered in vent gas treatment case by relief opening, enters the tail gas in vent gas treatment case, and first through Stirling engine, Stirling engine is collected the waste heat in tail gas and is used for generating electricity, and provides electric energy to external equipment;
The a part of tail gas flowing out Stirling engine feeds back in cylinder by EGR circulation loop, makes it in cylinder, carry out secondary combustion; Because the heat in the tail gas of outflow Stirling engine is lower than the heat flowed into before Stirling engine, thus decrease the generation of NOx; The tail gas flowed out after Stirling engine then enters particle separator, by the centrifugal force that the solid particle centrifuge rotation blade of particle separator produces, the solid particle carried in tail gas is carried out two be separated, solid particle after separation is under the effect of inertia, being got rid of on the tube wall of particle separator and to be adsorbed by metal filter screen, the first time completing tail gas filters;
Tail gas after filtering for the first time, then through being arranged on one deck filter screen of particle separator outlet, after making tail gas obtain second time filtration, and being disposed in air, realizing the purified treatment of tail gas.
The present invention, relative to prior art, has following advantage and effect:
1, the present invention is different from the pattern handled by conventional method.In traditional technological method, mainly for certain element of the first species process in emission, or several treatment device operates respectively, relatively independent.And the present invention is by being integrated in a vent gas treatment case by stirling generator, egr system and particle separator, in the process of tail gas by vent gas treatment case, discharge again after respectively the waste heat in tail gas, NOx, particle etc. being processed.Therefore, the tail gas of discharge be have passed through than more comprehensive process.
2, first the present invention utilizes the waste heat in tail gas in vent gas treatment case.Owing to containing a large amount of heats in tail gas, namely the principle of stirling generator is utilize the effect of external heat source to drive electricity generating device to generate electricity, and the electric energy obtained can be used for for external equipment, as motor uses.
3, the present invention's contained NOx gas in using egr system to tail gas processes.With conventional method unlike, owing to there is shifting relation between NOx and solid particle, of the present invention is the combination passing into pure oxygen and inert gas in air inlet place of diesel engine, wherein, condition can regulate the concentration of oxygen as required, compared to conventional method, can EGR rate be improved, the raising of oxygen concentration contributes to the minimizing of particle, and the method can reduce from source for the generation of NOx.
4, particle separation of the present invention is from directly to carry out filtration in conventional method different, the present invention adopts twice to be separated comprehensive use, first most of solid particle can be got rid of at tube wall by the blade of High Rotation Speed and be filtered by metal screen by tail gas, completes the centrifugal force cleaning filtration of first; Tail gas after the centrifugal force cleaning filtration of first, again through one deck filter screen, makes tail gas obtain secondary filter, and is disposed in air, realizes the purified treatment of tail gas.
5, stirling generator, egr system and particle separator are integrated in a vent gas treatment case by the present invention, can realize many-sided utilization and process to the tail gas of discharge.Meanwhile, various piece can according to circumstances regulate separately, can carry out independent management and utilization to each functional mode.
6, technical measure is simple and easy to do, and its application will be conducive to the further raising of tail gas disposal technique, more be conducive to environmental protection.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is EGR circulation loop schematic diagram.
Fig. 3 is that tail gas filters through first time and filters schematic diagram for the second time.
Embodiment
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The invention discloses a kind of exhaust gas processing device of large-scale diesel engine, comprise the vent gas treatment case being connected to cylinder tail gas outlet end, in described vent gas treatment case, connect stirling generator and particle separator successively by pipeline; Pipeline between stirling generator and particle separator is also connected with an egr system, partial tail gas is fed back to the inlet end of cylinder by egr system again by EGR circulation loop, makes unburnt tail gas return to cylinder and carries out secondary combustion.
Described particle separator comprises for the solid particle centrifuge of gas solid separation and the metal filter screen for collecting solid particle; By the rotation blade generation centrifugal force of solid particle centrifuge, the solid particle carried in gas is carried out two to be separated, solid particle is got rid of to the metal filtration on the tube wall being arranged on particle separator online, and solid particle is by metal filter screen absorption, collection.
Stirling generator, egr system are connected with particle separator by pipeline by the present invention, and be integrated in a vent gas treatment case, they are to control separately each other, also can adjust them according to the actual conditions of tail gas, there is good independence, can carry out respectively dismantling, safeguarding.In addition, vent gas treatment case is unified to collect to the harmful matter produced after vent gas treatment, carries out concentrating the maintenances such as cleaning, material removing more at set intervals to vent gas treatment case.Vent gas treatment case is connected by pipeline with the relief opening of diesel engine, realizes overall operability.
Adopt the exhaust gas processing device of large-scale diesel engine of the present invention, the process of vent gas treatment purification realized by following method:
Pass into the combination (replacing the air that conventional method adopts) of pure oxygen and inert gas at cylinder air inlet place, and condition regulates the concentration of oxygen as required;
Tail gas in cylinder is entered in vent gas treatment case by relief opening, enters the tail gas in vent gas treatment case, and first through Stirling engine, Stirling engine is collected the waste heat in tail gas and is used for generating electricity, and provides electric energy to external equipment;
The a part of tail gas flowing out Stirling engine feeds back in cylinder by EGR circulation loop, makes it in cylinder, carry out secondary combustion; Because the heat in the tail gas of outflow Stirling engine is lower than the heat flowed into before Stirling engine, thus decrease the generation of NOx; The tail gas flowed out after Stirling engine then enters particle separator, by the centrifugal force that the solid particle centrifuge rotation blade of particle separator produces, the solid particle carried in tail gas is carried out two be separated, solid particle after separation is under the effect of inertia, being got rid of on the tube wall of particle separator and to be adsorbed by metal filter screen, the first time completing tail gas filters;
Tail gas after filtering for the first time, then through being arranged on one deck filter screen of particle separator outlet, after making tail gas obtain second time filtration, and being disposed in air, realizing the purified treatment of tail gas.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. an exhaust gas processing device for large-scale diesel engine, is characterized in that, comprises the vent gas treatment case being connected to cylinder tail gas outlet end, connects stirling generator and particle separator successively in described vent gas treatment case by pipeline; Pipeline between stirling generator and particle separator is also connected with an egr system, partial tail gas is fed back to the inlet end of cylinder by egr system again by EGR circulation loop.
2. the exhaust gas processing device of large-scale diesel engine according to claim 1, is characterized in that, described particle separator comprises for the solid particle centrifuge of gas solid separation and the metal filter screen for collecting solid particle; By the rotation blade generation centrifugal force of solid particle centrifuge, the solid particle carried in gas is carried out two to be separated, solid particle is got rid of to the metal filtration on the tube wall being arranged on particle separator online, and solid particle is by metal filter screen absorption, collection.
3. an exhaust gas treating method for large-scale diesel engine, it is characterized in that the exhaust gas processing device of the large-scale diesel engine adopted described in claim 1 or 2 realizes, concrete steps are as follows:
Pass into the combination of pure oxygen and inert gas at cylinder air inlet place, and condition regulates the concentration of oxygen as required;
Tail gas in cylinder is entered in vent gas treatment case by relief opening, enters the tail gas in vent gas treatment case, and first through Stirling engine, Stirling engine is collected the waste heat in tail gas and is used for generating electricity, and provides electric energy to external equipment;
The a part of tail gas flowing out Stirling engine feeds back in cylinder by EGR circulation loop, makes it in cylinder, carry out secondary combustion; Because the heat in the tail gas of outflow Stirling engine is lower than the heat flowed into before Stirling engine, thus decrease the generation of NOx; The tail gas flowed out after Stirling engine then enters particle separator, by the centrifugal force that the solid particle centrifuge rotation blade of particle separator produces, the solid particle carried in tail gas is carried out two be separated, solid particle after separation, under the effect of inertia, to be got rid of on the tube wall of particle separator and to be filtered by the first time that metal filter screen has adsorbed tail gas;
Tail gas after filtering for the first time, then through being arranged on one deck filter screen of particle separator outlet, after making tail gas obtain second time filtration, and being disposed in air, realizing the purified treatment of tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700703.XA CN105257369A (en) | 2015-10-23 | 2015-10-23 | Tail gas treating device and method for large diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700703.XA CN105257369A (en) | 2015-10-23 | 2015-10-23 | Tail gas treating device and method for large diesel engine |
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| CN105257369A true CN105257369A (en) | 2016-01-20 |
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| CN201510700703.XA Pending CN105257369A (en) | 2015-10-23 | 2015-10-23 | Tail gas treating device and method for large diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150246A (en) * | 2017-12-30 | 2018-06-12 | 佛山市顺智环保科技有限公司 | A kind of automobile exhaust gas processing apparatus |
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| JP2013537594A (en) * | 2010-06-21 | 2013-10-03 | コーニング インコーポレイテッド | Exhaust gas treatment system including thermoelectric generator |
| CN103423010A (en) * | 2013-08-22 | 2013-12-04 | 华南理工大学 | Diesel engine energy-saving emission-reducing comprehensive control system and control method thereof |
| CN103470352A (en) * | 2013-09-23 | 2013-12-25 | 谢勇 | Recovery device for automobile exhaust waste heat based on Stirling engine |
| CN104405529A (en) * | 2014-11-27 | 2015-03-11 | 吉林大学 | Stirling cycle based engine exhaust gas energy conversion device |
| CN205064046U (en) * | 2015-10-23 | 2016-03-02 | 华南理工大学 | Tail gas processing apparatus of large -scale diesel engine |
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2015
- 2015-10-23 CN CN201510700703.XA patent/CN105257369A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013537594A (en) * | 2010-06-21 | 2013-10-03 | コーニング インコーポレイテッド | Exhaust gas treatment system including thermoelectric generator |
| CN103423010A (en) * | 2013-08-22 | 2013-12-04 | 华南理工大学 | Diesel engine energy-saving emission-reducing comprehensive control system and control method thereof |
| CN103470352A (en) * | 2013-09-23 | 2013-12-25 | 谢勇 | Recovery device for automobile exhaust waste heat based on Stirling engine |
| CN104405529A (en) * | 2014-11-27 | 2015-03-11 | 吉林大学 | Stirling cycle based engine exhaust gas energy conversion device |
| CN205064046U (en) * | 2015-10-23 | 2016-03-02 | 华南理工大学 | Tail gas processing apparatus of large -scale diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108150246A (en) * | 2017-12-30 | 2018-06-12 | 佛山市顺智环保科技有限公司 | A kind of automobile exhaust gas processing apparatus |
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