CN109458246A - A kind of diesel particulate moisture absorption apparatus and the evaluation method of particulate matter moisture absorption - Google Patents
A kind of diesel particulate moisture absorption apparatus and the evaluation method of particulate matter moisture absorption Download PDFInfo
- Publication number
- CN109458246A CN109458246A CN201811259343.4A CN201811259343A CN109458246A CN 109458246 A CN109458246 A CN 109458246A CN 201811259343 A CN201811259343 A CN 201811259343A CN 109458246 A CN109458246 A CN 109458246A
- Authority
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- China
- Prior art keywords
- moisture absorption
- diesel particulate
- main channel
- particle concentration
- particulate matter
- Prior art date
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 51
- 238000011156 evaluation Methods 0.000 title claims abstract description 11
- 239000013618 particulate matter Substances 0.000 title claims description 27
- 239000002245 particle Substances 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 239000003595 mist Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims description 27
- 230000008676 import Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 8
- 238000005070 sampling Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000035772 mutation Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of evaluation methods of diesel particulate moisture absorption, wherein, diesel engine vent gas enters diesel particulate moisture absorption apparatus from discharge pipe, then enter test pipeline by slowing down, with particle concentration detector and partial size tester measurement particle concentration and partial size in test pipeline, temperature and humidity are measured simultaneously, then water mist device is opened to moisten tail gas, particle concentration detector and partial size tester reading are being read in a moment, and record corresponding temperature and humidity.A kind of evaluation method of diesel particulate moisture absorption provided by the present invention, design structure is simple, it is easy to use, can from the exhaust pipe of engine extractor capacity 1/10-1/5, so that speed of the tail gas in sampling line drops to a lower state, temperature can be in a reasonable range, and the tail gas density in sampling line is more uniform.
Description
Technical field
The present invention relates to diesel particulate moisture absorption apparatus technical fields, and in particular to a kind of diesel particulate moisture absorption dress
It sets and the evaluation method of particulate matter moisture absorption.
Background technique
Due to diesel engine thermal efficiency height and the various advantages such as econmics comparison is good, although the use of diesel engine improves industry
Production efficiency and convenience in life, but exhaust pollution of diesel engines brings pressure to natural environment and causes to human health
Injury.Especially the particulate matter that goes out of diesel emission in conjunction with the moisture in atmosphere after, the wet particulate matter of formation, to the sun
Light has very strong refraction action, this makes to form haze in air.If people suck haze this health of people will be caused it is very big
Injury；Moisture absorption apparatus gas flow rate used at present is too fast, and humidifier can not make particulate matter wet complete.
Moisture absorption situation when being excluded by research diesel particulate for later environmental pollution improvement's problem provides foundation.
Summary of the invention
It is an object of the invention to provide a kind of diesel particulate moisture absorption apparatus, one in above-mentioned prior art problem is solved
Or it is multiple.
The evaluation method of a kind of diesel particulate moisture absorption according to the present invention, wherein diesel engine vent gas is from discharge pipe
It is middle to enter diesel particulate moisture absorption apparatus, then enter test pipeline by slowing down, uses particle concentration in test pipeline
Detector and partial size tester measurement particle concentration and partial size, while temperature and humidity are measured, then open water mist
Device moistens tail gas, is reading particle concentration detector and partial size tester reading in a moment, and record corresponding temperature
Humidity.
A kind of evaluation method of diesel particulate moisture absorption provided by the present invention, design structure is simple, easy to use, energy
The 1/10-1/5 of enough extractor capacities from the exhaust pipe of engine, so that speed of the tail gas in sampling line drops to one
Lower state, temperature can be in a reasonable range, and the tail gas density in sampling line is more uniform.
Flow is controlled by flow valve.In order to reduce the high-speed gas of enmgine exhaust discharge to probe tube inside
An elbow import is arranged in entrance in the disturbance of gas, sampler.So it is 30mm's that the import of sampler, which is a diameter,
Elbow.
In some embodiments, the variable quantity parameter after particulate matter moisture absorption is Δ,
Formula oneWherein i is group number, PisFor the accounting of i-th group of particle size interval after moisture absorption, Pi0
For the accounting of i-th group of particle size interval before moisture absorption, Δ1For relative size change of particles amount, the test section of particle instrument is 0.2,
0.4,0.6,1.0,2.0,5.0；
Formula two, wherein n is the quantity of particulate matter, nsFor the quantity of particulate matter after moisture absorption, n0For moisture absorption
The quantity of preceding particulate matter, Δ2For particulate count density relative variation；
Three Δ of formula3=ms-m0, wherein m is the mass density of particulate matter, msFor the mass density after particulate matter moisture absorption, m0
For the mass density before particulate matter moisture absorption, Δ3For the variable quantity of particle concentration.
In some embodiments, it is taken including probe tube, set on the elbow import of described probe tube one end and set on described
The exhaust pipe of the sample pipe other end, the probe tube include front end, probe tube middle part and tail end, the front end and the tail
End gradual change is connected to both ends in the middle part of the probe tube.Biggish diameter of section should be designed in the middle part of probe tube in order to tail gas
Slow down, sufficiently spread in the middle part of probe tube, moistens the accurate data measured of sensor for enabling be distributed in middle part completely；?
In circuit design, mutation should be avoided to manage as far as possible, how practical gradient tube prevents backflow phenomenon.
In some embodiments, the elbow import include main channel, set on the main channel side straight tube and
Heel set on described main channel one end, the main channel gradual change are connected in the heel, and the diameter of main channel is greater than
The diameter of the heel is vertically arranged between the straight tube and the heel, and the heel is set to the discharge pipe
In, blowing plant is connected on the straight tube, and valve is equipped between straight tube and the blowing plant, on main channel
Equipped with flowmeter.Elbow import is set, to reduce the high-speed gas of enmgine exhaust discharge to sampling tube interior gas
Disturbance.
In some embodiments, it is set in the middle part of the probe tube there are three preformed hole, is respectively arranged with water mist on preformed hole
Device, temperature and humidity test instrument and partial size tester/particle concentration detector.
In some embodiments, the diameter of the main channel is 20-40mm, and the diameter of the exhaust pipe is 40-80mm.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of diesel particulate moisture absorption apparatus of one embodiment of the present invention；
Fig. 2 is a kind of structure of the elbow import of diesel particulate moisture absorption apparatus of another embodiment of the invention
Schematic diagram.
Specific embodiment
With reference to the accompanying drawings of the specification, the present invention is described in more detail.
A kind of evaluation method of diesel particulate moisture absorption, wherein diesel engine vent gas enters diesel engine from discharge pipe
Then particulate matter moisture absorption apparatus enters test pipeline by slowing down, use particle concentration detector and grain in test pipeline
Diameter tester measures particle concentration and partial size, while measuring temperature and humidity, then opens water mist device and carries out to tail gas
It is wet, particle concentration detector and partial size tester reading are being read in a moment, and record corresponding temperature and humidity.
A kind of evaluation method of diesel particulate moisture absorption provided by the present invention, design structure is simple, easy to use, energy
The 1/10-1/5 of enough extractor capacities from the exhaust pipe of engine, so that speed of the tail gas in sampling line drops to one
Lower state, temperature can be in a reasonable range, and the tail gas density in sampling line is more uniform.
Flow is controlled by flow valve.In order to reduce the high-speed gas of enmgine exhaust discharge to probe tube inside
An elbow import 2 is arranged in entrance in the disturbance of gas, sampler.So it is 30mm's that the import of sampler, which is a diameter,
Elbow.
Variable quantity parameter after particulate matter moisture absorption is Δ,
Formula oneWherein i is group number, PisFor the accounting of i-th group of particle size interval after moisture absorption, Pi0
For the accounting of i-th group of particle size interval before moisture absorption, Δ1For relative size change of particles amount, the test section of particle instrument is 0.2,
0.4,0.6,1.0,2.0,5.0；
Formula two, wherein n is the quantity of particulate matter, nsFor the quantity of particulate matter after moisture absorption, n0For moisture absorption
The quantity of preceding particulate matter, Δ2For particulate count density relative variation；
Three Δ of formula3=ms-m0, wherein m is the mass density of particulate matter, msFor the mass density after particulate matter moisture absorption, m0
For the mass density before particulate matter moisture absorption, Δ3For the variable quantity of particle concentration.
The moisture absorption situation of particulate matter is evaluated by analyzing the size variation of parameter, Δ value.Δ value is bigger, partial size after moisture absorption
Variation is bigger, otherwise smaller.
As shown in fig. 1, diesel particulate moisture absorption apparatus includes probe tube 1, the elbow import set on 1 one end of probe tube
2 and set on 1 other end of probe tube exhaust pipe 3, probe tube 1 includes front end 11,12 and tail end 13 in the middle part of probe tube, front end
Portion 11 and 13 gradual change of tail end are connected to 12 both ends in the middle part of probe tube, in the middle part of probe tube 12 should design biggish diameter of section with
Convenient for the deceleration of tail gas, the 12 sufficiently diffusion in the middle part of probe tube moistens and enables the sensor for being distributed in middle part accurate completely
Data measured；In circuit design, mutation should be avoided to manage as far as possible, how practical gradient tube prevents backflow phenomenon.
In order to reduce exhaust resistance, 3 tunnel of exhaust pipe should be as straight as possible, when needing dog leg piping, the curvature of crooked pipeline
Radius should be big as far as possible.
As shown in Fig. 2, elbow import 2 includes main channel 21, set on the straight tube 22 of 21 side of main channel and set on main logical
The heel 23 of 21 one end of road, 21 gradual change of main channel are connected in heel 23, and the diameter of main channel 21 is greater than heel 23
Diameter is vertically arranged between straight tube 22 and heel 23, and heel 23 is set in discharge pipe, and it is empty that compression is connected on straight tube 22
Device of air 24, and valve 25 is equipped between straight tube 22 and blowing plant 24, main channel 21 is equipped with flowmeter 26, is arranged curved
Head import 2, to reduce disturbance of the high-speed gas of enmgine exhaust discharge to sampling tube interior gas.
In circuit design, mutation should be avoided to manage as far as possible, how practical gradient tube prevents backflow phenomenon.
12 set there are three preformed hole in the middle part of probe tube, are respectively arranged with water mist device 14, temperature and humidity test instrument 15 on preformed hole
And partial size tester/particle concentration detector 16, facilitate the various measuring instruments of installation, expands more convenient.
The diameter of main channel 21 is 20-40mm, and the diameter of exhaust pipe 3 is 40-80mm.
The above is only preferred embodiment of the invention, it is noted that those skilled in the art, not
Under the premise of being detached from the invention design, some similar deformation and improvement can be made, these are also considered as invention protection
Within.
Claims (6)
1. a kind of evaluation method of diesel particulate moisture absorption, wherein diesel engine vent gas enters diesel engine from discharge pipe
Then grain object moisture absorption apparatus enters test pipeline by slowing down, use particle concentration detector and partial size in test pipeline
Tester measures particle concentration and partial size, while measuring temperature and humidity, and it is wet to tail gas progress then to open water mist device
Profit is reading particle concentration detector and partial size tester reading in a moment, and is recording corresponding temperature and humidity.
2. a kind of evaluation method of diesel particulate moisture absorption according to claim 1, wherein the change after particulate matter moisture absorption
Change amount parameter is △,
Formula oneWherein i is group number, PisFor the accounting of i-th group of particle size interval after moisture absorption, Pi0To inhale
The accounting of wet thousand i-th group of particle size interval, Δ1For relative size change of particles amount, the test section of particle instrument is 0.2,0.4,
0.6,1.0,2.0,5.0；
Formula twoWherein n is the quantity of particulate matter, nsFor the quantity of particulate matter after moisture absorption, n0It is before moisture absorption
The quantity of grain object, Δ2For particulate count density relative variation；
Three Δ of formula3=ms-m0, wherein m is the mass density of particulate matter, msFor the mass density after particulate matter moisture absorption, m0For
Mass density before grain object moisture absorption, Δ3For the variable quantity of particle concentration.
3. a kind of diesel particulate moisture absorption apparatus based on claim 2, which is characterized in that including probe tube (1), be set to institute
It states the elbow import (2) of probe tube (1) one end and is set to the exhaust pipe (3) of the probe tube (1) other end, the probe tube
It (1) include front end (11), probe tube middle part (12) and tail end (13), the front end (11) and the tail end (13) are gradually
Change is connected to (12) both ends in the middle part of the probe tube.
4. a kind of diesel particulate moisture absorption apparatus according to claim 3, which is characterized in that the elbow import (2)
Including main channel (21), it is set to the straight tube (22) of the main channel (21) side and is set to the curved of the main channel (21) one end
Head (23), main channel (21) gradual change are connected on the heel (23), and the diameter of main channel (21) is greater than described curved
The diameter on head (23) is vertically arranged between the straight tube (22) and the heel (23), and the heel (23) is set to institute
It states in discharge pipe, is connected with blowing plant (24) on the straight tube (22), and straight tube (22) and the compressed air fill
It sets and is equipped with valve (25) between (24), main channel (21) are equipped with flowmeter (26).
5. a kind of diesel particulate moisture absorption apparatus according to claim 4, which is characterized in that in the middle part of the probe tube
(12) it sets there are three preformed hole, water mist device (14), temperature and humidity test instrument (15) and partial size test is respectively arranged on preformed hole
Instrument/particle concentration detector (16).
6. a kind of diesel particulate moisture absorption apparatus according to claim 5, which is characterized in that the main channel (21)
Diameter is 20-40mm, and the diameter of the exhaust pipe (3) is 40-80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259343.4A CN109458246B (en) | 2018-10-26 | 2018-10-26 | Diesel engine particulate matter moisture absorption device and particulate matter moisture absorption evaluation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259343.4A CN109458246B (en) | 2018-10-26 | 2018-10-26 | Diesel engine particulate matter moisture absorption device and particulate matter moisture absorption evaluation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109458246A true CN109458246A (en) | 2019-03-12 |
| CN109458246B CN109458246B (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811259343.4A Active CN109458246B (en) | 2018-10-26 | 2018-10-26 | Diesel engine particulate matter moisture absorption device and particulate matter moisture absorption evaluation method |
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| CN (1) | CN109458246B (en) |
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2018
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|---|---|---|---|---|
| US4092845A (en) * | 1976-05-28 | 1978-06-06 | Comitato Nazionale per l'Energia Nucleare -- Cnen | Lung simulating aerosol sampler |
| US4710887A (en) * | 1984-08-21 | 1987-12-01 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence | Computer controlled constant concentration and size particulate general system |
| US6151953A (en) * | 1998-01-27 | 2000-11-28 | Rupprecht & Patashnick Company, Inc. | Gas stream conditioning apparatus, system and method for use in measuring particulate matter |
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| CN109458246B (en) | 2020-12-04 |
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Effective date of registration: 20240110 Address after: Room 2919, Building B, No. 9 Tianchen Road, Lixia District, Jinan City, Shandong Province, 250000 Patentee after: SHANDONG CHENGKUN INFORMATION TECHNOLOGY CO.,LTD. Address before: 226000 No. 9 Siyuan Road, Chongchuan District, Nantong City, Jiangsu Province Patentee before: NANTONG University |