CN112879188A - Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine - Google Patents

Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine Download PDF

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Publication number
CN112879188A
CN112879188A CN202110257604.4A CN202110257604A CN112879188A CN 112879188 A CN112879188 A CN 112879188A CN 202110257604 A CN202110257604 A CN 202110257604A CN 112879188 A CN112879188 A CN 112879188A
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CN
China
Prior art keywords
pipe
oxygen
combustion engine
control valve
internal combustion
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Pending
Application number
CN202110257604.4A
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Chinese (zh)
Inventor
李伟
黄永仲
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Guangxi Yuchai Marine and Genset Power Co Ltd
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Guangxi Yuchai Machinery Co Ltd
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Priority to CN202110257604.4A priority Critical patent/CN112879188A/en
Publication of CN112879188A publication Critical patent/CN112879188A/en
Pending legal-status Critical Current

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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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • 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
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/10—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone
    • F02M25/12—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone the apparatus having means for generating such gases
    • 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
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/04—Combinations of different methods of purification afterburning and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/06—Combinations of different methods of purification afterburning and filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10—Carbon or carbon oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • 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 an air inlet and exhaust treatment system capable of realizing low emission of an internal combustion engine, which relates to the technical field of internal combustion engines and solves the technical problem that tail gas of the internal combustion engine contains a large amount of harmful gases and soot particle pollutants, and comprises an inert gas storage tank, an oxygen generator, a black carbon combustion device and a mixer, wherein the output end of the inert gas storage tank, the output end of the oxygen storage tank and the oxygen output end of the oxygen generator are connected with the same air supply pipe, the air supply pipe is connected with an air inlet pipe of the internal combustion engine, the air supply pipe is provided with the mixer, the black carbon combustion device is connected with an exhaust pipe of the internal combustion engine through a first tail gas pipe, a fifth control valve is arranged on the first tail gas pipe between the black carbon combustion device and the exhaust pipe, the fifth control valve is connected with the input end of the mixer through a second tail gas pipe, the, and a sixth control valve is arranged on the first air supplementing pipe.

Description

Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to an air intake and exhaust treatment system capable of realizing low emission of an internal combustion engine.
Background
As is well known, in an internal combustion engine using diesel oil, gasoline and other petrochemical fuel as fuel, air needs to be sucked into a cylinder, and carbon dioxide, nitrogen oxides NOx, hydrocarbons HC, soot particles, carbon dioxide CO and the like are generated after work is done by combustion2And water. Meanwhile, among the components of air, oxygen O 221% of nitrogen gas N2The percentage of the oxygen in the air sucked by the internal combustion engine is up to 78 percent, whether the internal combustion engine is a natural air suction type internal combustion engine or a turbocharged internal combustion engine, whether the internal combustion engine is in a plain area or a plateau area, and oxygen O in the air sucked by the internal combustion engine2With nitrogen N2The ratio of (a) is almost constant. It can be seen that oxygen O is helpful for combustion2The content ratio is always at a low level and during combustion, because of the large amount of N2The existence of the nitrogen oxide NOx can cause the internal combustion engine taking diesel oil as fuel to emit a large amount of nitrogen oxide NOx, and the oxygen O in the combustion process can be caused by the reduction of the air-fuel ratio during the heavy load or rapid acceleration process of the internal combustion engine because a large amount of fuel is injected into a cylinder to perform combustion work2The defects are caused, so that more soot particles are generated, and the environment is seriously influenced.
The increasing strictness of emission regulations has put higher demands on engine bodies, intake air treatment and exhaust gas aftertreatment, whether in the automotive engine market, the off-road engine market, or the marine and power generation engine market. In the field of internal combustion engines, exhaust gas aftertreatment is mainly carried out by oxidation reaction of carbon monoxide CO, HC hydrocarbon and nitrogen oxide NOx through DOC (diesel oxidation catalyst) to generate carbon dioxide CO2Water H2O and NO2DPF (soot trap)) Particulate components in the exhaust gas can be trapped and intercepted by the wall-flow DPF, thereby achieving the purification of particulates. To reduce DPF system drag, the DPF system must burn off, i.e., regenerate, the soot from the trapped particulates. And SCR (injecting urea solution NH)3Selective catalytic reduction device) to NO produced by a previous oxidation reaction2Carrying out catalytic reaction to generate N2And H2And O. Because DOC (diesel catalytic oxidation) uses rare noble metal as catalyst, DPF (carbon smoke particle catcher) adopts ceramic filter carrier with complex process and limited service life, SCR needs to consume a large amount of NH3The urea solution has high accumulated use cost, statistics shows that the purchase and maintenance cost of the internal combustion engine emission post-treatment device accounts for more than 30 percent of the purchase and maintenance cost of the whole engine, even higher cost, and a large amount of waste post-treatment devices are required to be recovered and treated due to faults or service life termination, so that the urea solution is not beneficial to the long-term and large-scale popularization and use of the post-treatment devices in the long term.
The main reason for this is the use of petrochemical oils, in particular the intake air required for combustion is taken from the air, which contains a high proportion of nitrogen N2Therefore, the exhaust gas discharged from the internal combustion engine contains a large amount of pollutants such as harmful gases like nitrogen oxides NOx and soot particles.
Disclosure of Invention
The present invention is directed to solving the above-mentioned problems of the prior art, and an object of the present invention is to provide an intake and exhaust treatment system that can achieve low emissions from an internal combustion engine.
The technical scheme of the invention is as follows: the utility model provides a can realize low processing system that admits air and exhausts that discharges of internal-combustion engine, includes inert gas holding vessel, oxygen generator, black carbon combustion device, blender, the output of inert gas holding vessel, the output of oxygen holding vessel, oxygen generator's oxygen output end are connected in same air supply pipe, the intake pipe of internal-combustion engine is connected to the air supply pipe, be equipped with the blender on the air supply pipe, the air supply pipe is kept away from the one end of intake pipe is equipped with first control valve, the output of inert gas holding vessel is equipped with the second control valve, the output of oxygen holding vessel is equipped with the third control valve, the oxygen output of oxygen generator is equipped with the fourth control valve, black carbon combustion device passes through first tail gas union coupling the blast pipe of internal-combustion engine, be equipped with the fifth control valve on the first tail gas union between black carbon combustion device and the blast pipe, the fifth control valve is connected with the input end of the mixer through a second tail gas pipe, the oxygen output end of the oxygen generator is connected with the input end of the black carbon combustion device through a first air supplementing pipe, and the first air supplementing pipe is provided with a sixth control valve.
As a further improvement, the black carbon combustion device comprises a shell, two ends of the shell are respectively connected with the first tail gas pipe, and an electric furnace wire is arranged inside the shell.
Further, the oxygen generator is a porous carbon molecular sieve type oxygen generator.
The gas supply pipe and the first exhaust pipe are correspondingly connected with a compressor and a turbine of the turbocharger.
Furthermore, a first intercooler is arranged on the air supply pipe between the air inlet pipe and the air compressor, and a second intercooler is arranged on the first tail gas pipe between the fifth control valve and the turbine.
Furthermore, an after-treatment device is arranged on a first tail gas pipe between the turbine and the second intercooler.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
in the starting stage of the internal combustion engine, the mixed gas of the inert gas and the oxygen is supplied through the inert gas storage tank, the oxygen storage tank and the oxygen generator, in the running stage of the internal combustion engine, the mixed gas of the tail gas and the oxygen is supplied through the oxygen storage tank, the oxygen generator and the second tail gas pipe, the emission of NOx compounds and carbon smoke particles can be greatly reduced, the dependence on an aftertreatment system is reduced, the use load of the aftertreatment system is reduced, the service life of the aftertreatment device is prolonged, the operation and maintenance cost is saved, and the black carbon combustion device is used for further reducing the emission of the NOx compounds and the carbon smoke particles in the tail gasThe soot particles are fully burned to generate CO2And H2And O is discharged into the atmosphere, so that the emission of soot particles can be greatly reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a black carbon combustion apparatus according to the present invention.
Wherein: 1-an inert gas storage tank, 2-an oxygen storage tank, 3-an oxygen generator, 4-a black carbon combustion device, 5-a mixer, 6-a gas supply pipe, 7-an internal combustion engine, 8-a gas inlet pipe, 9-a first control valve, 10-a second control valve, 11-a third control valve, 12-a fourth control valve, 13-a first tail gas pipe, 14-an exhaust pipe, 15-a fifth control valve, 16-a second tail gas pipe, 17-a first gas supply pipe, 18-a sixth control valve, 19-a shell, 20-an electric furnace wire, 21-a turbocharger, 22-a gas compressor, 23-a turbine, 24-a first intercooler, 25-a second intercooler and 26-a post-treatment device.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1 and 2, an intake and exhaust gas treatment system capable of achieving low emissions of an internal combustion engine includes an inert gas storage tank 1, an oxygen storage tank 2, an oxygen generator 3, a black carbon combustion device 4, and a mixer 5. The output end of the inert gas storage tank 1, the output end of the oxygen storage tank 2 and the oxygen output end of the oxygen generator 3 are connected with the same air supply pipe 6, the air supply pipe 6 is connected with an air inlet pipe 8 of an internal combustion engine 7, a mixer 5 is arranged on the air supply pipe 6, a first control valve 9 is arranged at one end, far away from the air inlet pipe 8, of the air supply pipe 6, a second control valve 10 is arranged at the output end of the inert gas storage tank 1, a third control valve 11 is arranged at the output end of the oxygen storage tank 2, a fourth control valve 12 is arranged at the oxygen output end of the oxygen generator 3, the black carbon combustion device 4 is connected with an exhaust pipe 14 of the internal combustion engine 7 through a first tail gas pipe 13, a fifth control valve 15 is arranged on the first tail gas pipe 13 between the black carbon combustion device 4 and the exhaust pipe 14, the fifth control valve 15 is connected with the input end of the mixer 5 through a second tail gas pipe 16, the first air supplement pipe 17 is provided with a sixth control valve 18.
The black carbon combustion device 4 comprises a shell 19, two ends of the shell 19 are respectively connected with the first tail gas pipes 13, an electric furnace wire 20 is arranged inside the shell 19, and the electric furnace wire 20 is connected with an external power supply.
The working principle is as follows:
when the internal combustion engine is started, the opening degrees of the second control valve 10, the third control valve 11 and the fourth control valve 12 can be controlled to enable oxygen and inert gas to be uniformly mixed according to a first set proportion and then input into the air inlet pipe 8 of the internal combustion engine 7 for the internal combustion engine to run, the inert gas does not participate in combustion, and the inert gas is mainly used for adjusting the proportion of the oxygen in the air inlet pipe 8 and preventing the problem of cylinder burning caused by overheating combustion due to overhigh proportion of the oxygen; the first set proportion is that the ratio of inert gas to oxygen is 3.7: 1-1: 1, and the ratio of inert gas to oxygen is continuously adjustable;
after the internal combustion engine is started successfully, oxygen and tail gas can be uniformly mixed according to a second set proportion by controlling the opening degrees of the third control valve 11, the fourth control valve 12 and the fifth control valve 15 and then are input into the air inlet pipe 8 for the internal combustion engine to run, the second set proportion is that the ratio of the tail gas to the oxygen is 1: 1-7: 1, the ratio of the tail gas to the oxygen is continuously adjustable, and the required amount of the oxygen can be adjusted in real time according to the running working condition of the internal combustion engine, so that the internal combustion engine 7 is always in an optimal air-fuel ratio state, the power performance and the economy are met, and the emission of soot particles is reduced;
when the internal combustion engine runs, the external power supply supplies power to the electric furnace wire 20, the electric furnace wire 20 is heated to a set temperature to fully burn the carbon smoke particles in the tail gas, and the generated CO2And H2O is discharged to the atmosphere, the first air supply pipe 17 conveys the oxygen of the oxygen generator 3 into the black carbon combustion device 4, and the oxygen in the black carbon combustion device 4 can be ensured to be sufficient, so that the carbon smoke particles are ensured to be fully burnt.
The inert gas may be any one of helium, neon, argon, krypton, and xenon, and preferably, the inert gas in this embodiment is argon.
In this embodiment, the oxygen generator 3 is a porous carbon molecular sieve type oxygen generator, after air is pressurized, air enters the oxygen generator 3 from the air inlet 29, and nitrogen and oxygen in the air are separated by utilizing the characteristic that the oxygen kinetic diameter is smaller than the nitrogen kinetic diameter and the diffusion speed of oxygen in the carbon molecular sieve is faster than that of nitrogen, and the nitrogen is discharged from the nitrogen outlet 30. Of course, in other embodiments, the oxygen generator 3 may also be a cryogenic air separation type oxygen generator, which uses the principle that the boiling point of liquid nitrogen is higher than that of liquid oxygen to separate and produce oxygen.
The system also comprises a turbocharger 21, and the air supply pipe 6 and the first tail gas pipe 13 are correspondingly connected with a compressor 22 and a turbine 23 of the turbocharger 21. A first intercooler 24 is arranged on the air supply pipe 6 between the air inlet pipe 8 and the compressor 22 and used for cooling the temperature of the supercharged inlet air. A second intercooler 25 is arranged on the first tail gas pipe 13 between the fifth control valve 15 and the turbine 23, and the second intercooler 25 can be cooled by seawater, fresh water or air. The second intercooler 25 preferably adopts a structure of cooling pipes and special-shaped cooling fins to effectively cool the tail gas, the temperature of the cooled tail gas is set to be less than 70 ℃, meanwhile, the lower temperature can reduce the exhaust energy, so that the thermal motion of carbon smoke particle molecules in the tail gas is greatly attenuated, and the residual carbon smoke particles are further settled and collected in the second intercooler 25.
An aftertreatment device 26 is arranged on the first exhaust pipe 13 between the turbine 23 and the second intercooler 25, and the aftertreatment device 26 includes at least one of a diesel oxidation catalyst DOC, a soot particulate trap DPF, and a selective catalytic reduction device SCR. Preferably, the aftertreatment device 26 in this embodiment includes a diesel oxidation catalyst DOC, a soot trap DPF, and a selective catalytic reduction device SCR, which are connected in this order. The fuel oil mainly contains C, H, S elements, N elements and oxygen and argon, so the content of nitrogen or nitrogen compound is very low. Therefore, in the exhaust gas aftertreatment device, the DOC device mainly oxidizes carbon monoxide CO and HC hydrocarbons to generate mainly carbon dioxide CO2Water H2O, part of soot particles, and trace amount of NOOxidation of x to NO2. The DPF traps soot particles and performs an active or passive regeneration cycle. While the SCR device reacts to the trace amount of NO previously generated by the oxidation reaction in the DOC2Catalytic reaction to generate trace N2And H2And O. The SCR is mainly used for closing the second control valve 10, the third control valve 11 and the fourth control valve 12 simultaneously, opening the first control valve 9 and taking gas from the atmosphere when the oxygen generator 3 and the oxygen storage tank 2 are completely out of service and no oxygen is generated and other emergency situations need to take gas from the atmosphere, wherein the nitrogen content in the air reaches 78%, so that the SCR is required to treat a large amount of NOx in tail gas to ensure the requirements of environmental protection laws and regulations. When the oxygen generator 3 and the oxygen storage tank 2 can work normally, the tail gas of the internal combustion engine only contains trace NOx, and the urea spraying amount of the SCR device is greatly reduced, so that the use cost of the internal combustion engine is saved, and the service life of the SCR device is prolonged.
The oxygen output end of the oxygen generator 3 is connected with the oxygen storage tank 2 through an inflation tube 27, and an air pump 28 is arranged on the inflation tube 27 and can supplement oxygen into the oxygen storage tank 2 in time.
In the starting stage of the internal combustion engine, the mixed gas of the inert gas and the oxygen is supplied through the inert gas storage tank, the oxygen storage tank and the oxygen generator, in the running stage of the internal combustion engine, the mixed gas of the tail gas and the oxygen is supplied through the oxygen storage tank, the oxygen generator and the second tail gas pipe, the emission of NOx compounds and soot particles can be greatly reduced, the dependence on an aftertreatment system is reduced, the use load of the aftertreatment system is reduced, the service life of the aftertreatment device is prolonged, the operation and maintenance cost is saved, the soot particles in the tail gas are further fully burned through the black carbon combustion device, and the generated CO is CO2And H2And O is discharged into the atmosphere, so that the emission of soot particles can be greatly reduced.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims (6)

1. The utility model provides a can realize low gas admission and exhaust treatment system who discharges of internal-combustion engine, its characterized in that includes inert gas holding vessel (1), oxygen holding vessel (2), oxygen generator (3), black carbon burner (4), blender (5), the output of inert gas holding vessel (1), the output of oxygen holding vessel (2), the oxygen output of oxygen generator (3) are connected in same air supply pipe (6), air supply pipe (6) are connected intake pipe (8) of internal-combustion engine (7), be equipped with blender (5) on air supply pipe (6), the one end that air supply pipe (6) kept away from intake pipe (8) is equipped with first control valve (9), the output of inert gas holding vessel (1) is equipped with second control valve (10), the output of oxygen holding vessel (2) is equipped with third control valve (11), the oxygen output of oxygen generator (3) is equipped with fourth control valve (12), black carbon combustion device (4) are connected through first tail gas pipe (13) blast pipe (14) of internal-combustion engine (7), be equipped with fifth control valve (15) on first tail gas pipe (13) between black carbon combustion device (4) and blast pipe (14), fifth control valve (15) are connected through second tail gas pipe (16) the input of blender (5), the oxygen output of oxygen generator (3) is connected through first air make-up pipe (17) the input of black carbon combustion device (4), be equipped with sixth control valve (18) on first air make-up pipe (17).
2. The intake and exhaust treatment system capable of realizing low emission of the internal combustion engine according to claim 1, wherein the black carbon combustion device (4) comprises a housing (19), two ends of the housing (19) are respectively connected with the first tail gas pipe (13), and an electric furnace wire (20) is arranged inside the housing (19).
3. The intake and exhaust treatment system for realizing low emission of internal combustion engine according to claim 1, wherein said oxygen generator (3) is a porous carbon molecular sieve type oxygen generator.
4. The intake and exhaust gas treatment system capable of realizing low emission of the internal combustion engine according to claim 1, further comprising a turbocharger (21), wherein the air supply pipe (6) and the first exhaust pipe (13) are correspondingly connected with a compressor (22) and a turbine (23) of the turbocharger (21).
5. An intake and exhaust gas treatment system for achieving low emissions from internal combustion engines according to claim 4, characterized in that the intake pipe (6) between the intake pipe (8) and the compressor (22) is provided with a first charge air cooler (24) and the first exhaust pipe (13) between the fifth control valve (15) and the turbine (23) is provided with a second charge air cooler (25).
6. An intake and exhaust treatment system for achieving low emissions from an internal combustion engine according to claim 5, characterised in that an after-treatment device (26) is provided in the first exhaust pipe (13) between the turbine (23) and the second charge air cooler (25).
CN202110257604.4A 2021-03-09 2021-03-09 Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine Pending CN112879188A (en)

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CN202110257604.4A CN112879188A (en) 2021-03-09 2021-03-09 Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine

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CN202110257604.4A CN112879188A (en) 2021-03-09 2021-03-09 Air intake and exhaust treatment system capable of realizing low emission of internal combustion engine

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