CN112832937A - Air intake and exhaust treatment system of low-emission internal combustion engine - Google Patents

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

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Publication number
CN112832937A
CN112832937A CN202110257680.5A CN202110257680A CN112832937A CN 112832937 A CN112832937 A CN 112832937A CN 202110257680 A CN202110257680 A CN 202110257680A CN 112832937 A CN112832937 A CN 112832937A
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CN
China
Prior art keywords
pipe
internal combustion
combustion engine
control valve
oxygen
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Pending
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CN202110257680.5A
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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 CN202110257680.5A priority Critical patent/CN112832937A/en
Publication of CN112832937A publication Critical patent/CN112832937A/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
    • 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
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention discloses an air inlet and exhaust treatment system of a low-emission 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 A seventh control valve.

Description

Air intake and exhaust treatment system of low-emission 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 and device of a low-emission 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 NO2The DPF (soot trap) may trap and intercept particulate components in the exhaust gas by the wall-flow DPF, thereby achieving the purification of the particulates. To reduce DPF system resistanceThe DPF system must burn off, i.e., regenerate, the soot in the intercepted 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 for a low emission internal combustion engine, which can improve measurement accuracy.
The technical scheme of the invention is as follows: the utility model provides an intake and exhaust treatment system of low emission internal-combustion engine, includes inert gas holding vessel, oxygen generator, black carbon combustion device, fuel jar, blender, the output of inert gas holding vessel, the output of oxygen holding vessel, oxygen generator's oxygen output are connected in same air supply pipe, the intake pipe of internal-combustion engine is connected to the air supply pipe, the blender is located 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, the first air supplementing pipe is provided with a sixth control valve, the fuel tank is connected with the black carbon combustion device through a fuel pipe, and a fuel pump and a seventh control valve are sequentially arranged on the fuel pipe from the fuel tank to the black carbon combustion device.
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, a nozzle connected with the fuel pipe is arranged in the shell.
Further, the fuel tank stores low pollution fuel.
Further, an intercooler is arranged on the first tail gas pipe between the exhaust pipe and the fifth control valve.
Furthermore, a post-treatment mechanism is arranged on a first tail gas pipe between the exhaust pipe and the intercooler.
Further, the nozzle mechanism comprises an annular pipe connected with the fuel pipe, and a plurality of nozzles which are uniformly arranged and are directed to the electric furnace wires are arranged on the circumference of the annular pipe.
Further, the aftertreatment mechanism comprises a diesel oxidation catalyst and a selective catalytic reduction device which are connected in sequence.
Further, the aftertreatment mechanism comprises a diesel oxidation catalyst, a soot particle catcher and a selective catalytic reduction device which are connected in sequence.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
the invention uses inert gas storage tank and oxygen storage tank in the starting stage of the internal combustion engineThe oxygen generator supplies mixed gas of inert gas and oxygen, and the mixed gas of tail gas and oxygen is supplied through the oxygen storage tank, the oxygen generator and the second tail gas pipe in the running stage of the internal combustion engine, so that the emission of NOx compounds and carbon 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, and 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 CO2And H2The O is discharged into the atmosphere, so that the emission of carbon smoke particles can be greatly reduced; the fuel tank supplies fuel to the black carbon combustion device through the fuel pump, and can ensure that soot particles are fully burnt under the combustion supporting of the fuel, so that the emission of the soot particles is further 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-inert gas storage tank, 2-oxygen storage tank, 3-oxygen generator, 4-black carbon combustion device, 5-fuel tank, 6-mixer, 7-air supply pipe, 8-internal combustion engine, 9-air inlet pipe, 10-first control valve, 11-second control valve, 12-third control valve, 13-fourth control valve, 14-first tail gas pipe, 15-exhaust pipe, 16-fifth control valve, 17-second tail gas pipe, 18-first air supplement pipe, 19-sixth control valve, 20-fuel pipe, 21-fuel pump, 22-seventh control valve, 23-shell, 24-electric furnace wire, 25-annular pipe, 26-intercooler, 27-after-treatment mechanism, 28-inflation pipe, 29-air pump, 5-fuel tank, 6-mixer, 9-internal combustion engine, 9-air inlet pipe, 10-first control valve, 11-second control valve, 12-third control valve, 13-fourth control valve, 30-air inlet, 31-nitrogen outlet, 32-nozzle.
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 of a low emission 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, a fuel tank 5, and a mixer 6. 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 7, and the air supply pipe 7 is connected with an air inlet pipe 9 of an internal combustion engine 8. The mixer 6 is arranged on the gas supply pipe 7, a first control valve 10 is arranged at one end of the gas supply pipe 7, which is far away from the gas inlet pipe 9, a second control valve 11 is arranged at the output end of the inert gas storage tank 1, a third control valve 12 is arranged at the output end of the oxygen storage tank 2, and a fourth control valve 13 is arranged at the oxygen output end of the oxygen generator 3. The black carbon combustion device 4 is connected with an exhaust pipe 15 of the internal combustion engine 8 through a first tail gas pipe 14, a fifth control valve 16 is arranged on the first tail gas pipe 14 between the black carbon combustion device 4 and the exhaust pipe 15, and the fifth control valve 16 is connected with the input end of the mixer 6 through a second tail gas pipe 17. The oxygen output end of the oxygen generator 3 is connected with the input end of the black carbon combustion device 4 through a first air supply pipe 18, and a sixth control valve 19 is arranged on the first air supply pipe 18. The fuel tank 5 is connected to the black carbon combustion device 4 through a fuel pipe 20, and a fuel pump 21 and a seventh control valve 22 are provided in this order from the fuel tank 5 to the fuel pipe 20 of the black carbon combustion device 4.
The black carbon combustion device 4 comprises a shell 23, two ends of the shell 23 are respectively connected with the first tail gas pipes 14, an electric furnace wire 24 is arranged inside the shell 23, and the electric furnace wire 24 is connected with an external power supply. The housing 23 is provided with a nozzle mechanism connected with the fuel pipe 20, the nozzle mechanism comprises an annular pipe 25 connected with the fuel pipe 20, the circumference of the annular pipe 25 is provided with a plurality of nozzles 32 which are uniformly arranged and directed to the electric stove wire 24, so that the fuel and the tail gas can be mixed more uniformly, and the fuel pump 21 is a metering pump. The fuel tank 5 stores therein a low pollution fuel such as methanol or dimethyl ether fuel.
An intercooler 26 is arranged on the first tail gas pipe 14 between the exhaust pipe 15 and the fifth control valve 16, and the intercooler 26 can be cooled by seawater, fresh water or air. The intercooler 26 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 ℃, and 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 intercooler 26.
An aftertreatment mechanism 27 is provided on the first exhaust pipe 14 between the exhaust pipe 15 and the intercooler 26. In one embodiment, the aftertreatment means 27 comprise a diesel oxidation catalyst DOC, a selective catalytic reduction device SCR, connected in series.
In another embodiment, the aftertreatment means 27 comprise a diesel oxidation catalyst DOC, a soot trap DPF, a selective catalytic reduction device SCR connected in series. 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 the soot particles, and oxidation of very traces of NOx 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 main function of the SCR is that when the oxygen generator 3 and the oxygen storage tank 2 are completely out of operation and no oxygen is generated, and when other emergency needs to take gas from the atmosphere, the second control valve 11, the third control valve 12 and the fourth control valve 13 are closed at the same time, the first control valve 10 is opened, the internal combustion engine 8 takes gas from the atmosphere, and at this time, the nitrogen content in the air reaches 78%, so that the SCR is required to treat a large amount of NOx in the tail gas to meet the requirements of environmental 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 28, and an air pump 29 is arranged on the inflation tube 28 and can supplement oxygen into the oxygen storage tank 2 in time.
The oxygen generator 3 is a porous carbon molecular sieve type oxygen generator, air enters the oxygen generator 3 from an air inlet 30 after being pressurized, the nitrogen and the 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 the oxygen in the carbon molecular sieve is higher than that of the nitrogen, and the nitrogen is discharged from a nitrogen outlet 31. 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 working principle is as follows:
when the internal combustion engine is started, the opening degrees of the second control valve 11, the third control valve 12 and the fourth control valve 13 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 9 of the internal combustion engine 8 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 9 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 12, the fourth control valve 13 and the fifth control valve 16 and then are input into the air inlet pipe 9 for the internal combustion engine to run, wherein 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 8 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 24, the electric furnace wire 24 is heated to a set temperature to fully burn the carbon smoke particles in the tail gas, and the generated CO2And H2Discharging O to the atmosphere; the black carbon combustion device 4 from the fuel tank 5 supplements extra fuel, and can ensure that soot particles are fully burned under the combustion supporting of the fuel; the first air supply pipe 18 conveys the oxygen of the oxygen generator 3 into the black carbon combustion device 4, so that the oxygen in the black carbon combustion device 4 can be ensured to be sufficient, and the carbon smoke particles can be 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.
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 (9)

1. The air intake and exhaust treatment system of the low-emission internal combustion engine is characterized by comprising an inert gas storage tank (1), an oxygen storage tank (2), an oxygen generator (3), a black carbon combustion device (4), a fuel tank (5) and a mixer (6), wherein 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 (7), the air supply pipe (7) is connected with an air intake pipe (9) of the internal combustion engine (8), the mixer (6) is positioned on the air supply pipe (7), one end, far away from the air intake pipe (9), of the air supply pipe (7) is provided with a first control valve (10), the output end of the inert gas storage tank (1) is provided with a second control valve (11), the output end of the oxygen storage tank (2) is provided with a third control valve (12), the oxygen output end of the oxygen generator (3) is provided with a fourth control valve (13), the black carbon combustion device (4) is connected with an exhaust pipe (15) of the internal combustion engine (8) through a first tail gas pipe (14), a fifth control valve (16) is arranged on the first tail gas pipe (14) between the black carbon combustion device (4) and the exhaust pipe (15), the fifth control valve (16) is connected with the input end of the mixer (6) through a second tail gas pipe (17), the oxygen output end of the oxygen generator (3) is connected with the input end of the black carbon combustion device (4) through a first gas supplementing pipe (18), a sixth control valve (19) is arranged on the first gas supplementing pipe (18), the fuel tank (5) is connected with the black carbon combustion device (4) through a fuel pipe (20), and a fuel pump (21) are sequentially arranged on the fuel pipe (20) of the black carbon combustion device (4) from the fuel tank (5), A seventh control valve (22).
2. The intake and exhaust treatment system of a low-emission internal combustion engine according to claim 1, wherein the black carbon combustion device (4) comprises a housing (23), the two ends of the housing (23) are respectively connected with the first tail gas pipe (14), and an electric furnace wire (24) is arranged inside the housing (23).
3. An intake and exhaust treatment system for a low emission internal combustion engine according to claim 2, wherein nozzle means are provided in the housing (23) for connection to the fuel pipe (20).
4. An intake and exhaust treatment system for a low-emission internal combustion engine according to claim 3, wherein said nozzle means comprises an annular pipe (25) connecting said fuel pipes (20), said annular pipe (25) being provided on its circumference with a plurality of nozzles (32) uniformly arranged and directed toward said electric wires (24).
5. The intake and exhaust gas treatment system of a low-emission internal combustion engine according to claim 1, wherein the fuel tank (5) stores low-pollution fuel therein.
6. An intake and exhaust treatment system for a low-emission internal combustion engine according to claim 1, wherein an intercooler (26) is provided in the first exhaust pipe (14) between the exhaust pipe (15) and the fifth control valve (16).
7. An intake and exhaust treatment system for a low-emission internal combustion engine according to claim 6, wherein an after-treatment mechanism (27) is provided in the first exhaust pipe (14) between the exhaust pipe (15) and the intercooler (26).
8. An intake and exhaust treatment system for a low-emission internal combustion engine according to claim 7, wherein the aftertreatment means (27) comprises a Diesel Oxidation Catalyst (DOC), a selective catalytic reduction device (SCR) connected in series.
9. The intake and exhaust treatment system of a low-emission internal combustion engine according to claim 7, wherein the aftertreatment means (27) comprises a Diesel Oxidation Catalyst (DOC), a soot trap (DPF), and a selective catalytic reduction device (SCR) connected in series.
CN202110257680.5A 2021-03-09 2021-03-09 Air intake and exhaust treatment system of low-emission internal combustion engine Pending CN112832937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110257680.5A CN112832937A (en) 2021-03-09 2021-03-09 Air intake and exhaust treatment system of low-emission internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110257680.5A CN112832937A (en) 2021-03-09 2021-03-09 Air intake and exhaust treatment system of low-emission internal combustion engine

Publications (1)

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CN112832937A true CN112832937A (en) 2021-05-25

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