CN103410588A - Diesel exhaust simulation generator and diesel particulate filter test system - Google Patents
Diesel exhaust simulation generator and diesel particulate filter test system Download PDFInfo
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- CN103410588A CN103410588A CN2013103464198A CN201310346419A CN103410588A CN 103410588 A CN103410588 A CN 103410588A CN 2013103464198 A CN2013103464198 A CN 2013103464198A CN 201310346419 A CN201310346419 A CN 201310346419A CN 103410588 A CN103410588 A CN 103410588A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02T10/40—Engine management systems
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Abstract
The invention aims to overcome the defects of the existing research methods and technologies and provides a diesel exhaust simulation generator. The diesel exhaust simulation generator is available for linear stable adjustment of parameters such as exhaust temperature, speed and particle concentration. According to the technical scheme for achieving the aim, the diesel exhaust simulation generator comprises a gas-solid ejector, a feeder and an air intake device. The invention further aims to overcome the defects of the existing research methods and technologies and provides a research and test system for filter efficiency, pressure drop characteristic and regeneration characteristic in the diesel particle filter on the basis of the diesel exhaust simulation generator..
Description
Technical field
The present invention relates to diesel engine vent gas carbon soot particles post-processing technology, be specifically related to the adjustable diesel engine vent gas simulation generator of the linear-in-the-parameters such as a kind of exhaust temperature, speed and granule density and take this device be the particle trapper filter efficiency in exhaust emissions source, drooping characteristic and reproducing characteristic research test system, can be for the performance study of different types of diesel engine particle catcher.
Background technique
Diesel engine has good power performance and the economy performance, and it is applied widely; Diesel engine is compared with petrol engine, has efficiency high, and oil consumption is low, harmful gas HC, CO discharge amount are quite low, generally only have 1/tens of petrol engine, NOx discharge amount and the petrol engine of diesel engine are in the same order of magnitude, but the diesel oil engine carbon smoke particulate discharge is 30～80 times of petrol engine.The porous carbon granules group that the soot particulate of diesel emission is 0.1～10 μ m by particle diameter forms.Wherein the particle diameter particulate matter that is less than 1 μ m accounts for more than 90%, and these superfine particulate matters have very strong adsorption force, thus almost all can be inhaled in human body, very large to heart and the respiratory tract injury of human body, often stick carcinogen is arranged.Utilize the chemical substance balancing method to determine that the result of study of source of particulate also shows, for the most fatal particle diameter, be less than the fine particle of 2.5 μ m, diesel-oil vehicle is topmost emission source, the diesel particulates pollution on the environment is day by day serious, has caused countries in the world government and the public's close attention and has extensively paid attention to.Diesel engine particle catcher is the practicability and effectiveness of generally acknowledging in the world at present and near commercial diesel particulates post-processing technology.At present the research of various particle trappers mainly concentrated on filter efficiency, drooping characteristic and reproducing characteristic, mainly adopt the research methods such as computer simulation emulation and prototype experiment.Especially imitation technology is widely applied, and can set flexibly the structural parameter of tail gas parameter and catcher.
But, because the parameters such as diesel engine exhaust emission temperature, speed, particle concentration, grain diameter can't realize linear adjustable, and emissions status is unstable, the tail gas of different parameters can't be realized the prototype experimental verification to filter efficiency, drooping characteristic, the reproducing characteristic of particle trapper, the analog simulation result lacks the experimental verification means, is seriously restricting the research and development of high-performance particle trapper.
Summary of the invention
One of purpose of the invention is the deficiency existed for existing biology barrier, proposes a kind of diesel engine vent gas simulation generator, and this device can realize that exhaust temperature, speed, the isoparametric linearity of granule density stablize adjustable.
For realizing that the technological scheme that the invention purpose adopts is such, a kind of diesel engine vent gas simulation generator, comprise gas-solid injector, charging device and air intake device.Described gas-solid injector comprises the reducer pipe I.The mouth of pipe radius of the tail end of described reducer pipe I is that the radius of R, the head end mouth of pipe is r
1, R
1R
1.Described charging device is positioned at the top of reducer pipe I, and charging device comprises: the hopper of carbon powder particle is housed, and drive link, blanking screw rod and feeding pipe.Described hopper is a hollow container, and its upper end is uncovered, lower end has discharge port.Described feeding pipe one end connects the tube wall of described discharge port, the other end insertion reducer pipe I.Described hopper top is equipped with speed-adjustable motor, and rotating shaft, the other end that an end of described drive link connects speed-adjustable motor connect the blanking screw rod that is positioned at hopper.Described air intake device comprises air pump, electric heater, reducer pipe II and air intake pipe, and described air pump has intake grill and exhaust outlet.Described electric heater comprises that an inside is equipped with the hollow casing of some heater elements, and described hollow casing has intake grill and exhaust outlet.The mouth of pipe radius of the tail end of described reducer pipe II is that the radius of R, the head end mouth of pipe is r
2, R
2R
2.One end of described air intake pipe connects the exhaust outlet of air pump, the intake grill that the other end connects described electric heater, and the tail end of described reducer pipe II is connected with the exhaust outlet of described electric heater.The head end of described reducer pipe II is inserted into the body inside of reducer pipe I from the tail end of reducer pipe I.
Further, the valve I is installed on described air intake pipe, the valve II is installed on described feeding pipe.
What deserves to be explained is, in described diesel engine vent gas simulation generator, carbon powder particle is along with the rotation of blanking screw rod enters into the reducer pipe I, and under the effect of described air pump, reducer pipe I inside becomes in fact an aerosol generator.Described air pump, heater and aerosol generator can be realized linearly adjust and stable operation to wind speed, temperature, carbon soot particles concentration and the particle diameter of simulated exhaust gas respectively in the diesel engine vent gas parameter variation range.
Furthermore, described air pump can produce the controlled air-flow of speed, and the flow velocity of this air-flow, in diesel engine vent gas velocity variations scope, particularly, can be adjusted airspeed by the valve of adjusting on the air pump air intake pipe.And the employing in the present invention electric heater, its structure is: be comprised of electric heating tube and the semicircle dividing plate done every heat treated heater bucket wall and six roots of sensation band radiating fin, described dividing plate is mainly used in supporting heating pipe and changes airflow direction, air-flow is fully contacted with the heating pipe radiating fin, improve the efficiency of heating surface; Heating system is adjusted by switch on heating pipe group number and heater voltage of adjustment, and heater can be heated to setting temperature to the ambient air that air pump blows out, and this temperature is within the diesel engine vent gas range of temperature.
The structure of hopper described in the present invention is similar to helixes feed equipment, and the particle powder is contained in hopper, and speed-adjustable motor is connected with the blanking screw rod by drive link, and namely the drive link lower end is connected with the blanking screw rod, and mixing blade is installed on drive link.Described blanking screw rod is threaded metallic rod on a body of rod.The lower end of described hopper is discharge port, and material blanking tube is connected with discharge port, and material blanking tube is enclosed within outside the blanking screw rod, as preferably, and described material blanking tube and the little Spielpassung of blanking screw rod.Described speed-adjustable motor drives drive link and rotates, and drive link drives again mixing blade and blanking bolt rotary.Particle in hopper descends from hopper, exporting by the rotation of blanking screw flight gap.Can by regulate motor speed adjust the blanking screw rod rotating speed, namely can control discharge quantity, thereby control the concentration of particulate matter in air-flow.
The present invention utilizes the kinetic energy of high velocity air to realize gas-solid mixing and powder conveying, the air ejected from reducer pipe I high speed forms negative pressuren zone in gas-solid injector, solid powder enters injector interior by valve under negative pressure gravitation and self-gravity action.Gas-solid mixture generation kinetic energy transmits, and both enter mixing chamber together, and here the liquid speed field reaches balanced.
Another purpose of the invention is the deficiency existed for existing biology barrier, and a kind of filter efficiency for diesel engine particle catcher, drooping characteristic and reproducing characteristic research test system further are provided on above-mentioned diesel engine vent gas simulation generator basis.
This particle trapper test system is except the whole parts that comprise described diesel engine vent gas simulation generator, also comprise tail gas simulation generator test module, particle trapper test module and pipeline, described pipeline one end connects the head end of described reducer pipe I, the import that the other end connects particle trapper to be measured.Described tail gas simulation generator test module is measured wind speed and the gas temperature in described air intake pipe, and wind speed and the gas temperature at the exhaust outlet place of described electric heater.Described particle trapper test module is measured particle concentration, pressure, temperature and the flow velocity of the import and export of described particle trapper to be measured.
What deserves to be explained is, the parameters such as the simulated exhaust gas temperature that described test control system can produce the diesel engine vent gas simulation generator, flow velocity, granule density are measured in real time and show, control system can be carried out the parameter adjusting according to setting parameter.
Test system of the present invention, can measure research to granule density, pressure drop and reproducing characteristic etc. before and after different types of particle trapper and reclaimer thereof.Each constituent element of device of the present invention and system adopts modular design, between each module, adopts the mode that removably connects, can needing combination, split or replacing according to test.
The accompanying drawing explanation
The device of the invention can further illustrate by the indefiniteness embodiment that accompanying drawing provides.
Fig. 1 is the structural representation of diesel engine vent gas simulation generator;
Fig. 2 is diesel emission particulate particle trapper test system structure schematic diagram.
Embodiment
Below in conjunction with embodiment, the invention is described further, only limits to following embodiment but should not be construed the above-mentioned subject area of the invention.Without departing from the technical idea of the present inventions, according to ordinary skill knowledge and customary means, make various replacements and change, all should be included in the protection domain of the invention.
Embodiment 1:
A kind of diesel engine vent gas simulation generator, comprise gas-solid injector 10, charging device and air intake device.
Described gas-solid injector 10 comprises reducer pipe I 100.The mouth of pipe radius of the tail end of described reducer pipe I 100 is R
1, the head end mouth of pipe radius be r
1, R
1R
1.Preferably, R
1=0.3r
1～0.8r
1.
Described charging device is positioned at the top of reducer pipe I 100, and charging device comprises: the hopper 6 of carbon powder particle is housed, and drive link 61, blanking screw rod 62 and feeding pipe 64.Described hopper 6 is a hollow container, and its upper end is uncovered, lower end has discharge port.Described feeding pipe 64 1 ends connect the tube wall of described discharge port, the other end insertion reducer pipe I 100, and namely the mouth of pipe of described feeding pipe 64 lower ends is in the inside of reducer pipe I 100.Described hopper 6 tops are equipped with speed-adjustable motor 5, and rotating shaft, the other end that an end of described drive link 61 connects speed-adjustable motor 5 connect the blanking screw rod 62 that is positioned at hopper 6.Charging device in the present embodiment is similar to common spiral charging device, it generally includes hopper 6, drive link 61, blanking screw rod 62 and feeding pipe 64 etc., speed-adjustable motor 5 drives blanking screw rod 62 by drive link 61 and rotates, on the blanking screw rod, be carved with by the downward-sloping screw thread of several angle, powder is carried downwards along the rotation of spiral turn trough road, and the screw rod rotational speed determines the unit time discharge quantity.
Described air intake device comprises air pump 2, electric heater 3, reducer pipe II 101 and air intake pipe, and described air pump 2 has intake grill and exhaust outlet.Described electric heater 3 comprises that an inside is equipped with the hollow casing of the heater elements such as some electric heating wire, and described hollow casing has intake grill and exhaust outlet.The mouth of pipe radius of the tail end of described reducer pipe II 101 is R
2, the head end mouth of pipe radius be r
2, R
2R
2, R preferably
1=0.3r
1～0.8r
1.In the present embodiment, described reducer pipe I 100 and reducer pipe II 101 are large, little straight tubes, and preferably, it is identical with the Concentric Reducers shape used in common water pump.And work as R
1=0.5r
1, R
1=0.9R
2, R
2=0.5r
2The time, be beneficial to aerocolloidal formation most.
One end of described air intake pipe connects the exhaust outlet of air pump 2, the intake grill that the other end connects described electric heater 3, and the tail end of described reducer pipe II 101 is connected with the exhaust outlet of described electric heater 3.The head end of described reducer pipe II 101 is inserted into the body inside of reducer pipe I 100 from the tail end of reducer pipe I 100.As preferably, the mouth of pipe of described reducer pipe II 101 in reducer pipe I 100 be positioned at the described feeding pipe 64 lower end mouths of pipe below.In the present embodiment, described air pump 2 can adopt air compressor, only the exhaust outlet of air compressor need to be connected and get final product with the intake grill of electric heater 3.
Further, valve I 1 is installed on described air intake pipe, on described feeding pipe 64, valve II 7 is installed.
During this device busy, the cool air in environment, under the pumping action of air pump 2, enters air pump 2 through valve 1.Cool air enters electric heater 3 with certain flow rate after air pump 2 pressurizations, in the present embodiment, described electric heater 3 also has regulator 4.As preferably, cool air be heated after fin in electric heater 3 fully contacts, then enter in reducer pipe II 101.Simultaneously, start speed-adjustable motor 5, be contained in the carbon powder particle of 6 li of hoppers under the effect of mixing blade, transport downwards along the spiral channel on the blanking screw rod, carbon powder particle, under the acting in conjunction of the thrust of gravity and blanking screw rod, enters in reducer pipe I 100 through valve 7.Under the negative pressure graviational interaction that the reducer pipe high velocity air causes, form certain density aerosol, form the simulated exhaust gas that setup parameter is all arranged after mixing through stable section is stable, this simulated exhaust gas, from the ejection of the head end reducer pipe I 100, is used to do test.
Embodiment 2:
The present embodiment provides a kind of particle trapper test system, it comprises the entire infrastructure of the described diesel engine vent gas simulation generator of embodiment, also comprise tail gas simulation generator test module 11, particle trapper test module 9 and pipeline, described pipeline one end connect described reducer pipe I 100 head end,, the other end connects the import of particle trapper 8 to be measured;
Wind speed and gas temperature that described tail gas simulation generator test module 11 is measured in described air intake pipe, and wind speed and the gas temperature at the exhaust outlet place of described electric heater 3.
Described particle trapper test module 9 is measured particle concentration, pressure, temperature and the flow velocity of the import and export of described particle trapper 8 to be measured.
In the present embodiment, adopt said system to test the diesel engine particle catcher (being above-mentioned particle trapper to be measured 8) that certain factory produces.Described particle trapper to be measured 8 comprises a suction port and an air outlet, and the suction port of described particle trapper 8 to be measured is connected with the head end (being the puff prot of reducer pipe I 100) of described reducer pipe I 100 by pipeline.The purpose of test is will simulate diesel engine under different operating mode (startup, idle running, load etc.), the performance of particle trapper 8 and regenerability.
The working method of native system:
Cool air in environment, under the pumping action of air pump 2, enters air pump 2 through valve 1.Cool air enters electric heater 3 with certain flow rate after air pump 2 pressurizations.After fin in cool air and electric heater fully contacts, be heated, then enter in reducer pipe II 101.Simultaneously, start speed-adjustable motor 5, be contained in the carbon powder particle of 6 li of hoppers under the effect of mixing blade, transport downwards along the spiral channel on the blanking screw rod, carbon powder particle, under the acting in conjunction of the thrust of gravity and blanking screw rod, enters in reducer pipe I 100 through valve 7.Under the negative pressure graviational interaction that the reducer pipe high velocity air causes, form certain density aerosol, form the simulated exhaust gas that setup parameter is all arranged after mixing through stable section is stable, this simulated exhaust gas sprays from the head end reducer pipe I 100.This simulated exhaust gas enters particle trapper to be measured 8, and the carbon soot particles in tail gas is discharged after filtering; Particle trapper test module 9 can be measured parameters such as the particle concentration before and after particle trapper, pressure, temperature, flow velocitys.
By the linearity adjustment to tail gas Operational Limitss such as flow velocity, temperature, granule density and particle diameters.Namely by adjusting rotating speed or the air intake valve of air pump 2, to control the flow velocity of tail gas; By the heating-up temperature (controlling the heating pipe quantity of opening) of controlling electric heater 3, control the temperature of tail gas; By controlling the rotating speed of speed-adjustable motor 5, control the tail gas middle particle concentration; The powder that a certain particle diameter of packing on demand in described hopper 6 distributes, control particle size distribution in tail gas.
Utilize this test system to carry out experimental research to filter efficiency, drooping characteristic and the reproducing characteristic of particle trapper, can complete the detailed performance experiment that the prototype experiment can't realize, can be for the improvement of the checking to the analog simulation result and computation model.
Further, native system has several mode of operations: the diesel motor exhaust simulative generator can carry out the linear parameter of adjusting and mainly comprise airspeed (parameter 1), temperature (parameter 2), granule density (parameter 3), and the difference of can also distribute according to powder particle size (parameter 4) forms the aerosol of variable grain particle diameter.
Pattern 1: parameter 4 is constant; Select to adjust any one parameter (not selected two kinds of parameters are constant) in parameter 1,2 and 3.Can study the affect rule of running parameter on the particle trapper performance.As constant as particle diameter distribution, temperature, concentration, adjust airspeed, the affect rule of research airspeed on the particle trapper various aspects of performance.
Pattern 2: parameter 4 is constant; Select any one in parameter 1,2 and 3 and immobilize, adjust not selected other two kinds of parameters in 1,2 and 3, the compound influence rule of two kinds of parameters of comprehensive study to particle trapper.
Mode 3: can also be according to the experiment needs, adjust simultaneously three kinds of Operational Limitss and particle diameter and distribute the particle trapper performance is studied.
Claims (3)
1. a diesel engine vent gas simulation generator, is characterized in that: comprise gas-solid injector (10), charging device and air intake device;
Described gas-solid injector (10) comprises reducer pipe I (100); The mouth of pipe radius of the tail end of described reducer pipe I (100) is R
1, the head end mouth of pipe radius be r
1, R
1R
1
Described charging device is positioned at the top of reducer pipe I (100), and charging device comprises: the hopper (6) of carbon powder particle is housed, and drive link (61), blanking screw rod (62) and feeding pipe (64); Described hopper (6) is a hollow container, and its upper end is uncovered, lower end has discharge port; Described feeding pipe (64) one ends connect the tube wall of described discharge port, the other end insertion reducer pipe I (100); Described hopper (6) top is equipped with speed-adjustable motor (5), and rotating shaft, the other end that an end of described drive link (61) connects speed-adjustable motor (5) connect the blanking screw rod (62) that is positioned at hopper (6);
Described air intake device comprises air pump (2), electric heater (3), reducer pipe II (101) and air intake pipe, and described air pump (2) has intake grill and exhaust outlet; Described electric heater (3) comprises that an inside is equipped with the hollow casing of some heater elements, and described hollow casing has intake grill and exhaust outlet; The mouth of pipe radius of the tail end of described reducer pipe II (101) is R
2, the head end mouth of pipe radius be r
2, R
2R
2One end of described air intake pipe connects the exhaust outlet of air pump (2), the intake grill that the other end connects described electric heater (3), and the tail end of described reducer pipe II (101) is connected with the exhaust outlet of described electric heater (3); The head end of described reducer pipe II (101) is inserted into the body inside of reducer pipe I (100) from the tail end of reducer pipe I (100).
2. diesel engine vent gas simulation generator according to claim 1, is characterized in that: valve I (1) is installed on described air intake pipe, valve II (7) is installed on described feeding pipe (64).
3. adopt the particle trapper test system of claim 1 or 2 described device, it is characterized in that: also comprise tail gas simulation generator test module (11), particle trapper test module (9) and pipeline, described pipeline one end connects the head end of described reducer pipe I (100), the import that the other end connects particle trapper to be measured (8);
Described tail gas simulation generator test module (11) is measured wind speed and the gas temperature in described air intake pipe, and wind speed and the gas temperature at the exhaust outlet place of described electric heater (3);
Described particle trapper test module (9) is measured particle concentration, pressure, temperature and the flow velocity of the import and export of described particle trapper to be measured (8).
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|---|---|---|---|
| CN201310346419.8A CN103410588B (en) | 2013-08-11 | 2013-08-11 | Diesel exhaust simulation generator and diesel particulate filter test system |
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|---|---|---|---|
| CN201310346419.8A CN103410588B (en) | 2013-08-11 | 2013-08-11 | Diesel exhaust simulation generator and diesel particulate filter test system |
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| CN103410588B CN103410588B (en) | 2015-06-17 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913418A (en) * | 2014-03-12 | 2014-07-09 | 中国人民解放军电子工程学院 | Automatic bio-particle spraying and releasing device |
| CN104014285A (en) * | 2014-06-25 | 2014-09-03 | 西华大学 | Aerosol generator capable of simulating exhaust grain flow of diesel engine |
| CN104833512A (en) * | 2015-04-14 | 2015-08-12 | 江苏大学 | Apparatus simulating the motion of particles in engine cylinders |
| CN109736926A (en) * | 2019-01-04 | 2019-05-10 | 无锡威孚力达催化净化器有限责任公司 | A kind of test device and test method of diesel engine DPF carbon carrying capacity |
| CN110102228A (en) * | 2019-04-30 | 2019-08-09 | 清华大学 | For reducing the I. C. engine exhaust particle stream evolution process simulator of motor vehicle emission |
| WO2022006768A1 (en) * | 2020-07-08 | 2022-01-13 | Corning Incorporated | Increasing and measuring filtration efficiency of a honeycomb body |
| CN115450737A (en) * | 2022-07-08 | 2022-12-09 | 陕煤集团神木红柳林矿业有限公司 | Fuel vehicle tail gas simulation generating device |
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| GB2546095A (en) * | 2016-01-08 | 2017-07-12 | Perkins Engines Co Ltd | System for simulating an aftertreatment of an engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103913418A (en) * | 2014-03-12 | 2014-07-09 | 中国人民解放军电子工程学院 | Automatic bio-particle spraying and releasing device |
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| CN109736926A (en) * | 2019-01-04 | 2019-05-10 | 无锡威孚力达催化净化器有限责任公司 | A kind of test device and test method of diesel engine DPF carbon carrying capacity |
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| WO2022006768A1 (en) * | 2020-07-08 | 2022-01-13 | Corning Incorporated | Increasing and measuring filtration efficiency of a honeycomb body |
| CN115450737A (en) * | 2022-07-08 | 2022-12-09 | 陕煤集团神木红柳林矿业有限公司 | Fuel vehicle tail gas simulation generating device |
| CN115450737B (en) * | 2022-07-08 | 2023-07-18 | 陕煤集团神木红柳林矿业有限公司 | Fuel vehicle tail gas simulation generating device |
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