CN208921585U - A kind of device obtaining diesel engine vent gas carbon soot particles - Google Patents
A kind of device obtaining diesel engine vent gas carbon soot particles Download PDFInfo
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- CN208921585U CN208921585U CN201821422050.9U CN201821422050U CN208921585U CN 208921585 U CN208921585 U CN 208921585U CN 201821422050 U CN201821422050 U CN 201821422050U CN 208921585 U CN208921585 U CN 208921585U
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Abstract
The utility model discloses a kind of devices for obtaining diesel engine vent gas carbon soot particles, including burner, displacement platform, stainless steel probe sampling system, Raman spectrometer, gas chromatograph, tail gas collecting device and computerized control system；Burner includes cylinder-shaped body, and upper end is embedded with cellular plunger, and honeycomb plunger is made of several long steel pipes, and burner gas import is connected by pipeline with each gas cylinder and diesel engine exhaust manifold；Exhaust manifold provides branch and is connected to gas chromatograph and tail gas collecting device；Soot is adsorbed on the filter membrane in sampler by vacuum pump by suction, and soot is analyzed for Raman spectrometer on filter membrane；Computerized control system is connected with gas chromatograph, Raman spectrometer, flowmeter and displacement platform.The utility model is the analysis for realizing diesel engine vent gas carbon soot particles breakage properties under lean-burn and rich condition, obtains fuel to air equivalence and lays a good foundation than the influence for soot breakage properties in diesel engine vent gas.
Description
Technical field
The utility model relates to a kind of diesel engine vent gas carbon obtained for characterizing diesel engine vent gas soot breakage properties
The device of smoke particle.
Background technique
Partial size and Particle density are one of the important indicators of carbon soot particles discharge, are had with human health and atmosphere environment impact
There is specific correlation.Therefore, Vehicular internal combustion engine also proposes grain number concentration discharge while controlling particulate matter quality discharge
Requirement higher and higher.The partial size and grain number concentration of carbon soot particles are mainly influenced by breakage properties, the hair of Fragmentation Phenomena
The raw partial size that will lead to carbon soot particles quickly reduces, and middle grain number concentration quicklys increase.Therefore, in order to effectively control exhaust gases of internal combustion engines
Particulate count concentration discharge simultaneously reduces its harm to atmospheric environment and human health, develops a kind of research diesel engine vent gas soot
The device and method of Particle Breakage characteristic is of great significance.
Utility model content
The utility model overcome the deficiencies in the prior art proposes a kind of device for obtaining diesel engine vent gas carbon soot particles, is
It realizes the acquisition for carrying out carbon soot particles to diesel engine vent gas carbon soot particles breakage properties analysis under lean-burn and rich condition, is the later period
Fuel to air equivalence is further obtained than laying the foundation for the research of the influence of carbon soot particles breakage properties in diesel engine vent gas.
In order to solve the above technical problems, the utility model proposes a kind of dresses for obtaining diesel engine vent gas carbon soot particles
It sets, including burner, displacement platform, stainless steel probe sampling system, Raman spectrometer, gas chromatograph, tail gas collecting device is more
A gas cylinder and computerized control system；The multiple gas cylinder include a methane gas cylinder, an oxygen gas cylinder, a nitrogen gas cylinder and
One argon gas gas cylinder；The burner includes cylinder-shaped body, and the cylinder-shaped body includes mutually nested outer cylinder and interior
Cylinder, the upper surface of described inner cylinder is concordant with the upper surface of the outer cylinder, and the outer cylinder is protruded from below the inner cylinder
Below, the lower part of the inner cylinder is equipped with gas feed, and the outer diameter of the outer cylinder is 75mm, and the outer diameter of the inner cylinder is
The upper end of 25mm, the inner cylinder are embedded with cellular plunger, the cellular plunger long steel small by several diameters
Pipe composition, the outer diameter of the long steel pipe are 1.62mm, internal diameter 1.5mm, the upper surface of described cellular plunger and the inner circle
The upper surface of cylinder is concordant；The outer cylinder is equipped with gas feed, and the lower part of the inner cylinder is equipped with first gas import and the second gas
The gas feed of body import, the outer cylinder is connected to the argon gas gas cylinder by connecting line A, sets on the connecting line A
There is flowmeter；The first gas import of the inner cylinder is connected to the one end on an inlet manifold road, the inlet manifold road it is another
One end is respectively connected to the methane gas cylinder, oxygen gas cylinder and nitrogen gas cylinder, three connecting lines by three pipelines in parallel
On be equipped with flowmeter；The second gas import of the inner cylinder is connected on the exhaust manifold of diesel engine；The exhaust manifold
It is equipped with flowmeter；The tube wall of the exhaust manifold is set there are two hole, which passes through pipeline B respectively and pipeline C is connected to
The gas chromatograph and the tail gas collecting device；The burner is fixed on the displacement platform, and the displacement platform is by two
A step motor control realizes the movement of combustor level and vertical direction；The stainless steel probe sampling system includes liquid nitrogen
Steel cylinder, cold nitrogen stream meter, stainless steel probe, sampler, vacuum pump, constant temperature water tank and controller, the stainless steel probe cloth
It sets in the surface of the burner, the stainless steel probe is equipped with a 0.128mm's in the middle position of length direction
Micropore, the stainless steel probe are embedded into a water-cooling groove, and the diameter of the stainless steel probe is 4/5 to be partially embedded into
In water-cooling groove, and it being in the relationship being fully sealed with water-cooling groove, the micropore of the stainless steel probe is exposed at except the water-cooling groove,
The input end of the stainless steel probe is connected by pipeline D with the outlet of a liquid nitrogen steel cylinder, and pipeline D is equipped with cold nitrogen stream
The outlet end of meter, the stainless steel probe is connected by pipeline E with the input end of the sampler, the outlet of the sampler
End is connected with the input end of the vacuum pump；The sampler is provided with the filter membrane of polytetrafluoroethylene (PTFE), in the suction of the vacuum pump
Under power effect, the carbon soot particles in burner flame are adsorbed on the filter membrane of polytetrafluoroethylene (PTFE), the teflon membrane filter
On the carbon soot particles that are collected into analyzed for Raman spectrometer；The inlet and outlet of the water-cooling groove is connected with the constant temperature water tank
Form circulation waterway；The gas chromatograph is furnished with thermal conductivity detector (TCD), and oxygen contains in the exhaust manifold for measuring diesel engine
Amount；All flowmeter, displacement platform, gas chromatograph and Raman spectrometers are connected with the computerized control system, the electricity
Brain control system is used to control the entrance burner different gas flow and combustion flame position height and gas chromatograph
Sampling analysis.
Further, the diameter of the stainless steel probe is 6.35mm, wall thickness 1.12mm.
The micropore of the stainless steel probe is downwards.
Compared with prior art, the utility model has the beneficial effects that
Realize the acquisition online to carbon soot particles in diesel engine vent gas；Using water cooling stainless steel probe sampling system,
The influence that stainless steel probe itself is rapidly heated in sampling process to carbon soot particles characteristic is avoided, for in diesel engine vent gas
The breakage properties research of carbon soot particles is laid a good foundation.
Detailed description of the invention
Fig. 1 the utility model obtains the device figure of the device of diesel engine vent gas carbon soot particles；
The schematic block diagram of water-cooled stainless steel probe sampling system in Fig. 2 the utility model；
The axial sectional view of stainless steel probe and water-cooling groove in Fig. 3 the utility model；
Fig. 4 is the end direction view of stainless steel probe and water-cooling groove shown in Fig. 3.
In figure: 1- diesel engine, 2- gas chromatograph, 3- tail gas collecting device, 4- exhaust manifold, 5- flowmeter 1,6- inner circle
Cylinder, 7- displacement platform, 8- Raman spectrometer, the cellular plunger of 9-, 10- stainless steel probe sampling system, 11- outer cylinder, 12-
Methane gas cylinder, 13- oxygen gas cylinder, 14- nitrogen gas cylinder, 15- argon gas gas cylinder, 16- flowmeter 2,17- flowmeter 3,18- flowmeter
4,19- flowmeters 5,101- liquid nitrogen steel cylinder, the cold nitrogen stream meter of 102-, the stainless steel probe of 103-, 104- sampler, 105- vacuum
Pump, 106- water-cooling groove, 107- constant temperature water tank, 108- controller
Specific embodiment
Technical solutions of the utility model are described in further detail in the following with reference to the drawings and specific embodiments, it is described
Specific embodiment is only explained the utility model, is not intended to limit the utility model.
In order to solve the above technical problems, the utility model proposes a kind of acquisition diesel engine vent gas carbon soot particles dress
It sets, as shown in Figure 1, the device includes burner, displacement platform 7, stainless steel probe sampling system 10, Raman spectrometer 8, gas phase color
Spectrometer 2, tail gas collecting device 3, multiple gas cylinders and computerized control system；The multiple gas cylinder includes a methane gas cylinder 12, one
13, nitrogen gas cylinders 14 of a oxygen gas cylinder and an argon gas gas cylinder 15.
The burner includes cylinder-shaped body, and the cylinder-shaped body includes mutually nested outer cylinder 11 and inner cylinder
6, the upper surface of described inner cylinder 6 is concordant with the upper surface of the outer cylinder 11, protrudes from the outer cylinder below the inner cylinder 6
Below 11, the lower part of the inner cylinder 6 is equipped with gas feed, and the outer diameter of the outer cylinder 11 is 75mm, the inner cylinder
Outer diameter is 25mm, and the upper end of the inner cylinder 6 is embedded with cellular plunger 9, it is ensured that mixed gas and carbon soot particles uniformly flow out,
The cellular plunger 9 is made of the small long steel pipe of several diameters, and the outer diameter of the long steel pipe is 1.62mm, and internal diameter is
1.5mm, the upper surface of described cellular plunger 9 are concordant with the upper surface of the inner cylinder 6；The outer cylinder 11 be equipped with gas into
Mouthful, the lower part of the inner cylinder 6 is equipped with first gas import and second gas import, and the gas feed of the outer cylinder 11 passes through
Connecting line A is connected to the argon gas gas cylinder 15, and the connecting line A is equipped with flowmeter 19, ensure that gas pair in air
The interference of premixed flame；The first gas import of the inner cylinder 6 is connected to the one end on an inlet manifold road, the inlet manifold
The other end on road is respectively connected to the methane gas cylinder 12, oxygen gas cylinder 13 and nitrogen gas cylinder 14 by three pipelines in parallel,
Flowmeter 16,17,18 is equipped on three connecting lines；The second gas import of the inner cylinder 6 is connected to the row of diesel engine
On gas manifold 4, one layer of heat preservation substance is covered outside the exhaust manifold 4 of the diesel engine 1, reduces tail gas heat dissipation, and then guarantee exhaust
Soot characteristic in manifold will not find significant changes；The exhaust manifold 4 be equipped with flowmeter 5, control diesel engine vent gas into
Enter the flow of burner；The tube wall of the exhaust manifold 4 is set there are two hole, and aperture is 3cm, which passes through pipeline respectively
B and pipeline C is connected to the gas chromatograph 2 and the tail gas collecting device 3, and the tail gas collecting device 3 is for collecting tail
Gas is discharged into atmosphere after processing, and the burner is fixed on the displacement platform 7, and the displacement platform 7 is by two stepping electricity
Machine control, realizes the movement of combustor level and vertical direction；
As shown in Fig. 2, the stainless steel probe sampling system 10 in the utility model is that a water-cooled stainless steel is visited
Needle sampling system, including liquid nitrogen steel cylinder 101, stainless steel probe 103, sampler 104, vacuum pump 105, constant temperature water tank 107 and control
Device 108 processed, the stainless steel probe 103 are arranged in the surface of the burner, and the diameter of the stainless steel probe 103 is
6.35mm, wall thickness 1.12mm, the diameter of the sampling micropore on end is 0.128mm within the probe, as shown in Figure 3 and Figure 4, described
The diameter of stainless steel probe 103 is 4/5 to be partially embedded into water-cooling groove 106, and be in the pass being fully sealed with water-cooling groove 106
System, the micropore of the stainless steel probe 103 straight down and are exposed at except the water-cooling groove 106, the stainless steel probe 103
Left end be input end, which is connected by pipeline D with the outlet of the liquid nitrogen steel cylinder 101, and pipeline D is equipped with cold nitrogen
The right end of flowmeter 102, the stainless steel probe 103 is outlet end, which passes through pipeline E and the sampler 104
Input end is connected, and the outlet end of the sampler 104 is connected with the input end of the vacuum pump 105；The sampler 104 is built-in
There is the filter membrane of polytetrafluoroethylene (PTFE), under the suction of the vacuum pump 105, carbon soot particles in burner flame is adsorbed onto poly-
On the filter membrane of tetrafluoroethene, the carbon soot particles being collected on the teflon membrane filter are analyzed for Raman spectrometer 8；Such as figure
Shown in 2 and Fig. 3, the import 1061 of the water-cooling groove) and outlet (1062) and the constant temperature water tank (107) be connected to form recirculated water
Road；The gas chromatograph 2 is furnished with thermal conductivity detector (TCD), the content of oxygen in the exhaust manifold 4 for measuring diesel engine.
The computerized control system is connected with flowmeter 5,16,17,18,19, reads the signal and basis of flowmeter feedback
Situation adjusting air valve aperture is actually needed with adjusting gas flow, the computerized control system also with the displacement platform 7, gas phase color
Spectrometer 2 is connected with Raman spectrometer 8, controls sample position and and gas chromatograph of the stainless steel probe of water cooling in combustion flame
2 sampling analysis.
Soot sample is obtained using the device of above-mentioned acquisition diesel engine vent gas carbon soot particles and to the characterization of its breakage properties
Method the following steps are included:
Step 1: setup parameter, includes at least setting: opening each gas cylinder valve, pressure, the kind of fuel gas of each gas cylinder
The sampling height of class, the temperature of constant temperature water tank 107, stainless steel probe 103 in flame；
It selects methane as fuel gas in this example, selects argon gas as protective gas, flow velocity is set as 30L/
Min, working condition include: that the pressure of methane, oxygen, nitrogen and argon gas is set as 0.3MPa, the temperature setting of constant temperature water tank
It is 0 DEG C, stainless steel water cooling probe is highly set as 3mm in flame.
Step 2: diesel engine 2 is opened heat engine half an hour, after 1 operating condition of diesel engine is stablized, the exhaust of diesel engine is set
The flow velocity being passed into burner in manifold 4 is 2.43L/min, with 2 row of measuring of gas chromatograph with thermal conductivity detector (TCD)
Oxygen content in gas manifold, the flow velocity for calculating oxygen is 0.34L/min.
Step 3: fuel to air equivalence ratio total in setting burner flame is 0.85, guarantee the premixed flame that burner is formed
For Lean Burn Operating, measuring oxygen gas flow rate in diesel engine exhaust manifold is 0.34L/min, is found out by following formula and is passed through burner
The flow velocity of middle methane, oxygen and nitrogen gas is respectively 0.6,1.07 and 2.62L/min
In formula (1):Indicate total fuel to air equivalence ratio；Fuel oil indicates the flow of fuel oil, unit L/min；Oxygen1Table
Show the flow of oxygen in tail gas, unit L/min, oxygen2Indicate the flow for being passed through the oxygen of burner, unit L/min.
Step 4: according to find out come each gas flow velocity to enter burner in methane, oxygen and nitrogen stream
Speed is configured, and lights fuel gas by ignition；The position for adjusting the displacement platform 7, makes burner flame center
Floor projection be overlapped with the floor projection of the sampling micropore of middle position in the stainless steel probe 103, flame to be combusted
After stabilization；The switch of vacuum pump 105 is opened by controller, and the flow velocity of the nitrogen from the liquid nitrogen steel cylinder 101 is set,
Carbon soot particles in flame are sampled, sample time 2min, then, is put into culture dish after the filter membrane of polytetrafluoroethylene (PTFE) is taken out
In；The height that displacement platform 7 is adjusted after carbon soot particles sampling process of every completion, realizes and samples in different flame heights, this reality
Applying in example is to sample at 6mm, 9mm and 12mm flame height respectively, to obtain one group of carbon soot particles.
Step 5: fuel to air equivalence ratio total in setting burner flame is 1.05, it is fuel-rich for guaranteeing that burner forms flame
Operating condition, repeats Step 3: four, obtains another group of carbon soot particles according to above-mentioned identical method；By what is obtained under lean burn conditions
Carbon soot particles are denoted as carbon soot particles A, and the carbon soot particles obtained under rich condition are denoted as carbon soot particles B；
Step 6: carbon soot particles A and carbon soot particles B are detected on the Raman spectrometer 8 with analyzer respectively,
By adjusting the direction of analyzer, to obtain scattering light in polarized component vertically and horizontally, and then Depolarization Ratio is obtained, moved back
Partially than the light intensity ratio of as vertical direction and horizontal direction；Linear close is presented in the breakage properties of the Depolarization Ratio and carbon soot particles
System, specifically: soot particle degree of crushing is bigger, and depolarization ratio is also bigger；By the depolarization of carbon soot particles A and carbon soot particles B
It is compared and analyzed than data, can be obtained the breakage properties of the carbon soot particles under lean-burn and rich condition.Testing result shows
The Depolarization Ratio that soot Depolarization Ratio is greater than the soot under identical flame height rich condition is obtained under Lean Burn Operating, is illustrated dilute
Soot is easier to occur broken under combustion working condition.This is mainly due to the oxygen that Lean Burn Operating has more affluences, and oxygen, which has, more to be filled
The sufficient time, which is diffused into inside soot, makes its oxidation, leads to the generation of soot Fragmentation Phenomena.
Although the utility model is described above in conjunction with attached drawing, the utility model is not limited to above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, rather than restrictive, the ordinary skill of this field
Personnel are under the enlightenment of the utility model, in the case where not departing from the utility model aims, can also make many variations, this
It belongs within the protection of the utility model a bit.
Claims (3)
1. a kind of device for obtaining diesel engine vent gas carbon soot particles, including burner, displacement platform (7), stainless steel probe sampling system
System (10), Raman spectrometer (8), gas chromatograph (2), tail gas collecting device (3), multiple gas cylinders and computerized control system；Institute
Stating multiple gas cylinders includes a methane gas cylinder (12), an oxygen gas cylinder (13), a nitrogen gas cylinder (14) and an argon gas gas
Bottle (15)；
It is characterized in that,
The burner includes cylinder-shaped body, and the cylinder-shaped body includes mutually nested outer cylinder (11) and inner cylinder
(6), the upper surface of described inner cylinder (6) is concordant with the upper surface of the outer cylinder (11), protrudes from institute below the inner cylinder (6)
It states below outer cylinder (11), the lower part of the inner cylinder (6) is equipped with gas feed, and the outer diameter of the outer cylinder (11) is
75mm, the outer diameter of the inner cylinder are 25mm, and the upper end of the inner cylinder (6) is embedded with cellular plunger (9), the honeycomb
Plunger (9) be made of the small long steel pipe of several diameters, the outer diameter of the long steel pipe is 1.62mm, internal diameter 1.5mm, institute
It is concordant to state the upper surface of the upper surface of cellular plunger (9) and the inner cylinder (6)；The outer cylinder (11) is equipped with gas feed,
The lower part of the inner cylinder (6) is equipped with first gas import and second gas import, and the gas feed of the outer cylinder (11) is logical
It crosses connecting line A and is connected to the argon gas gas cylinder (15), the connecting line A is equipped with flowmeter；The of the inner cylinder (6)
One gas feed is connected to the one end on an inlet manifold road, and the other end on the inlet manifold road passes through three pipelines point in parallel
It is not connected to the methane gas cylinder (12), oxygen gas cylinder (13) and nitrogen gas cylinder (14), is equipped with flow on three connecting lines
Meter；The second gas import of the inner cylinder (6) is connected on the exhaust manifold (4) of diesel engine；
The exhaust manifold (4) is equipped with flowmeter (5)；The tube wall of the exhaust manifold (4) is set there are two hole, which divides
The gas chromatograph (2) and the tail gas collecting device (3) are not connected to by pipeline B and pipeline C；
The burner is fixed on the displacement platform (7), and the displacement platform (7) realizes burning by two step motor controls
The movement in the horizontal and vertical direction of device；
The stainless steel probe sampling system (10) include liquid nitrogen steel cylinder (101), stainless steel probe (103), sampler (104),
Vacuum pump (105), constant temperature water tank (107) and controller (108), the stainless steel probe (103) are arranged in the burner
Surface, the stainless steel probe (103) length direction middle position be equipped with a 0.128mm micropore, it is described not
Rust steel probe (103) is embedded into a water-cooling groove (106), and the 4/5 of stainless steel probe (103) diameter is embedded into water-cooling groove
(106) in, and it being in the relationship being fully sealed with water-cooling groove, the micropore of the stainless steel probe is exposed at except the water-cooling groove,
The input end of the stainless steel probe (103) is connected by pipeline D with the outlet of a liquid nitrogen steel cylinder (101), and pipeline D is equipped with
Cold nitrogen stream meter (102), the outlet end of the stainless steel probe (103) pass through the import of pipeline E and the sampler (104)
End is connected, and the outlet end of the sampler (104) is connected with the input end of the vacuum pump (105)；In the sampler (104)
Filter membrane equipped with polytetrafluoroethylene (PTFE) inhales the carbon soot particles in burner flame under the suction of the vacuum pump (105)
It is attached on the filter membrane of polytetrafluoroethylene (PTFE), the carbon soot particles being collected on the teflon membrane filter are used for Raman spectrometer (8)
Analysis；The import (1061) and outlet (1062) of the water-cooling groove and the constant temperature water tank (107) are connected to form circulation waterway；Institute
It states gas chromatograph (2) and is furnished with thermal conductivity detector (TCD), the content of oxygen in the exhaust manifold (4) for measuring diesel engine；
All flowmeter, displacement platform (7), gas chromatograph (2) and Raman spectrometers (8) with the computerized control system phase
Connection.
2. obtaining the device of diesel engine vent gas carbon soot particles according to claim 1, which is characterized in that the stainless steel probe
(103) diameter is 6.35mm, wall thickness 1.12mm.
3. obtaining the device of diesel engine vent gas carbon soot particles according to claim 1, which is characterized in that the stainless steel probe
Micropore downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821422050.9U CN208921585U (en) | 2018-08-31 | 2018-08-31 | A kind of device obtaining diesel engine vent gas carbon soot particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821422050.9U CN208921585U (en) | 2018-08-31 | 2018-08-31 | A kind of device obtaining diesel engine vent gas carbon soot particles |
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| Publication Number | Publication Date |
|---|---|
| CN208921585U true CN208921585U (en) | 2019-05-31 |
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ID=66704745
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821422050.9U Withdrawn - After Issue CN208921585U (en) | 2018-08-31 | 2018-08-31 | A kind of device obtaining diesel engine vent gas carbon soot particles |
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| CN (1) | CN208921585U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141890A (en) * | 2018-08-31 | 2019-01-04 | 天津大学 | Device and method based on Depolarization Ratio characterization diesel engine vent gas soot breakage properties |
-
2018
- 2018-08-31 CN CN201821422050.9U patent/CN208921585U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141890A (en) * | 2018-08-31 | 2019-01-04 | 天津大学 | Device and method based on Depolarization Ratio characterization diesel engine vent gas soot breakage properties |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190531 Effective date of abandoning: 20200313 |
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