CN110145390B - Backpressure-reducing discharge device and backpressure-reducing discharge method - Google Patents
Backpressure-reducing discharge device and backpressure-reducing discharge method Download PDFInfo
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- CN110145390B CN110145390B CN201910464876.4A CN201910464876A CN110145390B CN 110145390 B CN110145390 B CN 110145390B CN 201910464876 A CN201910464876 A CN 201910464876A CN 110145390 B CN110145390 B CN 110145390B
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- laval nozzle
- pipe
- backpressure
- back pressure
- mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/06—Exhaust treating devices having provisions not otherwise provided for for improving exhaust evacuation or circulation, or reducing back-pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to the technical field of tail gas purification treatment, in particular to a backpressure reduction discharge device and a backpressure reduction discharge method. According to the backpressure-reducing discharge method, the branch pipeline and the Laval nozzle are additionally arranged, wherein the branch pipeline is used for being directly connected with the tail gas pipe, and the Laval nozzle is connected with the fan and used for generating negative pressure in the main pipeline; on the other hand can produce the negative pressure in the trunk line, reduces the backpressure in the trunk line, the tail gas of being convenient for is discharged. Based on the method, the backpressure reducing and discharging device provided by the invention not only can effectively reduce the backpressure of the system, but also can prolong the service life of the fan and reduce the cost.
Description
Technical Field
The invention relates to the technical field of tail gas purification treatment, in particular to a backpressure reduction discharge device and a backpressure reduction discharge method.
Background
The ship tail gas contains a large amount of oxysulfide, and the oxysulfide is discharged in the atmosphere to easily generate acid rain, so that the ecological environment is damaged, and therefore, the tail gas needs to be purified. In order to meet the increasingly strict requirements of exhaust emission, a filler with a filtering function is generally added in the washing tower to improve the purification rate of the ship exhaust. However, the increase of the filler increases the back pressure and affects the performance of the host machine.
To reduce back pressure, it is common practice to add a blower at the scrubber discharge end. However, the ship exhaust gas after purification contains more or less sulfur oxides, nitrogen oxides, dust and water vapor which are not completely treated, and the mixed compounds have a certain corrosion effect on the fan, so that the service life of the fan is shortened. In order to improve the corrosion resistance of the fan, a better fan manufacturing material has to be selected, but the cost is increased along with the selection.
Therefore, a new type of back pressure reducing discharge device is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a backpressure reducing discharge method, which not only can effectively reduce the backpressure of a system, but also can prolong the service life of a fan and reduce the cost.
The invention also aims to provide a backpressure-reducing discharging device, which can effectively reduce the backpressure of a system, prolong the service life of a fan and reduce the cost by applying the backpressure-reducing discharging method.
In order to realize the purpose, the following technical scheme is provided:
a reduced back pressure drain comprising:
the main pipeline comprises a first connecting port, a second connecting port and an exhaust port;
a laval nozzle having one end in communication with the first connection port and another end configured for mounting a blower to generate a negative pressure at the second connection port;
and the branch pipeline is communicated with the second connecting port.
Further, still include:
and the mounting sleeve is sleeved on the Laval nozzle and is connected with the first connecting port.
Further, one end of the laval nozzle is disposed in the main pipe.
Further, one end of the mounting sleeve is arranged in the main pipeline.
Further, be provided with first mount table on the outer wall of trunk line, be provided with the second mount table on the outer wall of installing sleeve, the second mount table can with first mount table is connected.
Further, still include:
a gasket disposed between the first mounting stage and the second mounting stage.
Further, the branch pipeline comprises a first pipe, one end of the first pipe is communicated with the second connecting port, and the other end of the first pipe faces towards one end far away from the exhaust port.
Further, the branch pipeline further comprises a second pipe communicated with the first pipe, the second pipe is arranged in parallel with the Laval nozzle, and is located at one end far away from the exhaust port.
A reduced back pressure discharge method for reducing back pressure of a discharge apparatus, the discharge apparatus including a main pipe, the reduced back pressure discharge method comprising:
the main pipeline is provided with a first connecting port, a second connecting port and an exhaust port;
a Laval nozzle is additionally arranged, one end of the Laval nozzle is communicated with the first connecting port, and the other end of the Laval nozzle is configured to be used for installing a fan so as to generate negative pressure at the second connecting port;
and a branch pipeline is additionally arranged and is communicated with the second connecting port.
Further, the backpressure reducing discharge method further comprises the following steps:
and additionally arranging a mounting sleeve, sleeving the mounting sleeve on the Laval nozzle, and connecting the mounting sleeve with the main pipeline.
Compared with the prior art, the invention has the beneficial effects that:
according to the backpressure-reducing discharge method, the branch pipeline and the Laval nozzle are additionally arranged, wherein the branch pipeline is used for being directly connected with the tail gas pipe, and the Laval nozzle is connected with the fan and used for generating negative pressure in the main pipeline, so that on one hand, the tail gas is prevented from being directly contacted with the fan, the corrosion and damage to the fan are prevented, and the service life of the fan is prolonged; on the other hand can produce the negative pressure in the trunk line, reduces the backpressure in the trunk line, the tail gas of being convenient for is discharged.
Based on the method, the backpressure-reducing discharging device provided by the invention has the advantages that the branch pipeline is arranged on the main pipeline and is used for being directly connected with the tail gas pipe, the Laval nozzle is connected with the fan and is used for generating negative pressure in the main pipeline, on one hand, the tail gas is prevented from being directly contacted with the fan, the corrosion and the damage to the fan are prevented, and the service life of the fan is prolonged; on the other hand can produce the negative pressure in the trunk line, reduces the backpressure in the trunk line, the tail gas of being convenient for is discharged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a backpressure reducing drain device provided by the present invention;
FIG. 2 is a cross-sectional view of a reduced back pressure drain provided by the present invention;
FIG. 3 is a schematic structural view of the connection of the main pipe and the branch pipe provided by the present invention;
FIG. 4 is a schematic structural view of a Laval nozzle provided in the present invention;
FIG. 5 is a schematic structural view of a mounting sleeve provided in accordance with the present invention;
fig. 6 is a partially enlarged view of a portion a in fig. 1.
Reference numerals:
1-a main pipeline; 11-a first connection port; 12-a second connection port; 13-an exhaust port; 14-a first mounting stage;
2-a laval nozzle; 21-an inlet end; 22-an outlet end;
3-branch pipelines; 31-a first tube; 32-a second tube; 321-a tail gas inlet;
4-installing a sleeve; 41-a second mounting table;
5-sealing gasket.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when the product is used, and are only for convenience of description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The present embodiment provides a reduced back pressure drain method for reducing the back pressure of a drain, the drain comprising a main conduit 1, the method comprising:
a first connecting port 11, a second connecting port 12 and an exhaust port 13 are formed in the main pipeline 1;
a Laval nozzle 2 is additionally arranged, one end of the Laval nozzle 2 is communicated with the first connecting port 11, and the other end of the Laval nozzle 2 is configured to be used for installing a fan so as to generate negative pressure at the second connecting port 12;
a branch pipeline 3 is additionally arranged, and the branch pipeline 3 is communicated with the second connecting port 12.
According to the backpressure-reducing discharge method provided by the embodiment, the branch pipeline 3 and the laval nozzle 2 are additionally arranged, wherein the branch pipeline 3 is used for being directly connected with the tail gas pipe, and the laval nozzle 2 is connected with the fan and used for generating negative pressure in the main pipeline 1, so that on one hand, the tail gas is prevented from being directly contacted with the fan, the corrosion and damage to the fan are prevented, and the service life of the fan is prolonged; on the other hand can produce the negative pressure in trunk line 1, reduces the backpressure in trunk line 1, the tail gas of being convenient for is discharged.
Preferably, be the contained angle setting with small transfer line 3 and trunk line 1, and small transfer line 3 orientation deviates from the one end of trunk line 1 gas vent 13 to make gaseous being certain inclination from small transfer line 3 entering trunk line 1, so that gaseous the emission.
It should be noted that the method mainly utilizes the characteristic of the laval nozzle 2, and the high-pressure air enters from the large-caliber end of the laval nozzle 2, enters into the contraction section, is compressed and accelerated, and then is ejected from the small-caliber end at a high speed. The principle is as follows:
A1V1＝A2V2
wherein A is the cross-sectional area; v is the gas flow rate; ρ is the gas density.
Assuming that air is ideal fluid and is incompressible, it can be seen from the above formula that the air flow velocity at the end of the laval nozzle 2 is greater than that at the front end, which results in the air pressure at the end decreasing, and when the difference between the air flow velocities at the front end and the end reaches a certain degree, the air pressure at the end is lower than that in the tail gas pipe, which results in the tail gas being sucked from the tail gas pipe and then being forcibly exhausted by the air ejected from the laval nozzle 2 at high speed.
Preferably, the method further comprises the step of additionally arranging a mounting sleeve 4, wherein the mounting sleeve 4 is sleeved on the laval nozzle 2 and is connected with the main pipeline 1, so that the laval nozzle 2 is convenient to connect on one hand, the connecting part is convenient to seal on the other hand, and the back pressure reducing effect of the fan is improved.
Based on the above method, as shown in fig. 1 to 3, the present embodiment provides a backpressure reducing drain comprising a main pipe 1, a laval nozzle 2 and a branch pipe 3. The main pipe 1 includes a first connection port 11, a second connection port 12, and an exhaust port 13. The branch duct 3 communicates with the second connection port 12 to facilitate gas discharge. One end of the laval nozzle 2 communicates with the first connection port 11 and the other end thereof is configured for mounting a fan for generating a negative pressure at the second connection port 12. Install the fan on Laval spray tube 2, avoid damaging the fan from the gas corrosion that branch pipeline 3 got into, prolong the life of fan. According to the backpressure-reducing discharging device provided by the embodiment, the branch pipeline 3 is arranged on the main pipeline 1, wherein the branch pipeline 3 is used for being directly connected with the tail gas pipe, and the laval nozzle 2 is connected with the fan and used for generating negative pressure in the main pipeline 1, so that on one hand, the tail gas is prevented from being directly contacted with the fan, the corrosion and damage to the fan are prevented, and the service life of the fan is prolonged; on the other hand can produce the negative pressure in trunk line 1, reduces the backpressure in trunk line 1, the tail gas of being convenient for is discharged.
The backpressure-reducing discharge device provided by the embodiment can be applied to a ship tail gas discharge system, so that the direct contact between a fan and ship tail gas can be avoided, and the service life of the fan is prolonged; in addition, the device can generate larger negative pressure in the main pipeline 1, thereby achieving the purposes of reducing the back pressure of the whole system, smoothly discharging tail gas discharged by a ship and improving the performance of a main machine; and finally, the tail gas is discharged to a farther position under the pushing of the gas sprayed at high speed by the Laval nozzle 2, so that the pollution and corrosion of the tail gas to the ship body are reduced.
Preferably, the small transfer line 3 is the contained angle setting with trunk line 1, and the orientation deviates from the one end of gas vent 13 to gaseous being certain inclination from small transfer line 3 entering trunk line 1, making gaseous 13 directions of gas vent flow, thereby be convenient for gas outgoing.
Preferably, the outlet end 22 of the laval nozzle 2 is arranged coaxially with the exhaust port 13 of the main conduit 1, so that the high velocity air ejected from the outlet end 22 of the laval nozzle 2 flushes the gas entering the main conduit 1 from the branch conduit 3 out of the exhaust port 13.
Illustratively, the front half of the laval nozzle 2 tapers from a large to a medium to a narrow throat. The narrow throat is then dilated from small to large. The gas flows into the front half part of the laval nozzle 2 under high pressure, passes through the narrow throat and then escapes from the rear half part, so that the speed of the gas flow is changed due to the change of the cross-sectional area of the laval nozzle 2, and the speed of the gas flow is increased.
Further, in the present embodiment, the front half of the laval nozzle 2 is a large-diameter cylinder and a tapered shape with a gradually decreasing cross section, the middle narrow throat is a small-diameter cylinder, the rear half is a tapered shape with a gradually increasing cross section, and the diameter of the outlet end 22 of the rear half is smaller than that of the inlet end of the front half.
Further, as shown in fig. 2, one end of the laval nozzle 2 is disposed in the main pipe 1, so that the high-speed air ejected from the laval nozzle 2 can quickly take away the gas entering the main pipe 1 from the branch pipe 3. Specifically, the small-diameter outlet end 22 of the laval nozzle 2 is slightly lower than the outlet end 22 of the branch pipe 3, that is, the small-diameter outlet end 22 of the laval nozzle 2 is slightly lower than the second connection port 12, so that the high-speed air ejected from the laval nozzle 2 can quickly take away the gas entering the main pipe 1 from the branch pipe 3.
Preferably, in order to facilitate this installation of reducing back pressure eduction gear to guarantee its effect of reducing back pressure, lateral 3 includes first pipe 31, and the one end of first pipe 31 is linked together with second connector 12 and is the contained angle setting with trunk line 1, and the one end setting of gas vent 13 is kept away from to the other end orientation of first pipe 31, thereby makes gaseous behind first pipe 31 entering trunk line 1, has the power to gas vent 13 direction flow, thereby is convenient for gas outgoing.
Preferably, the branch conduit 3 is communicated with the first conduit 31 and comprises a second conduit 32, and the second conduit 32 is arranged in parallel with the main conduit 1 and is arranged at one end far away from the exhaust port 13. Specifically, the tail gas inlet 321 of the second pipe 32 is connected to the tail gas pipe, and the second pipe 32 is parallel to the main pipe 1, so as to fix the second pipe 32 to the main pipe 1.
Optionally, as shown in fig. 4, the outer wall of the large-caliber inlet end 21 of the laval nozzle 2 is provided with a mounting flange to facilitate mounting and fixing the fan at the inlet end 21 of the laval nozzle 2.
Furthermore, a reinforcing rib can be arranged on the outer wall of the Laval nozzle 2 to improve the structural strength of the Laval nozzle. Specifically, the one end of strengthening rib is connected with the outer wall of Laval spray tube 2, and its other end is connected with mounting flange.
In order to improve the sealing performance of the connection between the laval nozzle 2 and the main pipeline 1, the backpressure reducing and discharging device further comprises a mounting sleeve 4, wherein the mounting sleeve 4 is sleeved on the laval nozzle 2 and is connected with the first connecting port 11.
Illustratively, as shown in fig. 5 in conjunction with fig. 2, the mounting sleeve 4 includes a cylindrical rotator connected to an outer wall of the inlet end 21 of the laval nozzle 2 and a conical rotator having an end connected to the outlet end 22 of the laval nozzle 2.
Optionally, in order to improve the sealing between the laval nozzle 2 and the main pipe 1, one end of the mounting sleeve 4 is arranged in the main pipe 1 to fix the laval nozzle 2 located in the main pipe 1.
Illustratively, one end of the laval nozzle 2 disposed in the main pipe 1 is connected to one end of the mounting sleeve 4 disposed in the main pipe 1 by welding. Specifically, in the present embodiment, the small-diameter outlet end 22 of the laval nozzle 2 is flush with the port of the mounting sleeve 4, and has the same diameter, so as to weld the two. That is, the diameter of one end of the mounting sleeve 4 is the same as the diameter of the outlet end 22 of the laval nozzle 2, and the diameter of the other end thereof is the same as the diameter of the inlet end 21 of the laval nozzle 2.
Preferably, as shown in fig. 6, a first mounting platform 14 is provided on the outer wall of the main pipe 1, and a second mounting platform 41 is provided on the outer wall of the mounting sleeve 4, wherein the second mounting platform 41 can be connected with the first mounting platform 14. Illustratively, the first mounting block 14 and the second mounting block 41 are both mounting flanges, and the first mounting block 14 and the second mounting block 41 are connected by fasteners.
Further, in order to improve the sealing effect at the joint of the first mounting table 14 and the second mounting table 41, the device further comprises a sealing gasket 5 arranged between the first mounting table 14 and the second mounting table 41. The seal 5 may be, for example, a rubber seal.
Further, an elastic pad and a flat pad may be provided between the first mounting stage 14 and the second mounting stage 41 to improve the connection strength and the sealing property at the connection portion.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A reduced back pressure drain, comprising:
a main pipe (1) comprising a first connecting port (11), a second connecting port (12) and an exhaust port (13);
a laval nozzle (2) having one end communicating with the first connection port (11) and slightly lower than the second connection port (12) and the other end configured for mounting a fan for generating a negative pressure at the second connection port (12);
the branch pipeline (3) is communicated with the second connecting port (12), the branch pipeline (3) and the main pipeline (1) form an included angle, and the branch pipeline (3) faces to one end of the exhaust port (13) deviating from the main pipeline (1) to enable gas to enter the main pipeline (1) from the branch pipeline (3) at a certain inclination angle;
the mounting sleeve (4) is sleeved on the Laval nozzle (2) and is connected with the first connecting port (11);
the mounting sleeve (4) comprises a cylindrical rotating body and a conical rotating body, the cylindrical rotating body is connected with the outer wall of the inlet end (21) of the Laval nozzle (2), and the end part of the conical rotating body is connected with the outlet end (22) of the Laval nozzle (2).
2. The reduced back pressure drain arrangement according to claim 1, characterized in that one end of the laval nozzle (2) is arranged in the main pipe (1).
3. A reduced back pressure drain according to claim 2, wherein one end of the mounting sleeve (4) is arranged in the main conduit (1).
4. The backpressure reducing drain device according to claim 3, characterized in that a first mounting stage (14) is provided on the outer wall of the main pipe (1), a second mounting stage (41) is provided on the outer wall of the mounting sleeve (4), the second mounting stage (41) being connectable with the first mounting stage (14).
5. The reduced back pressure drain of claim 4, further comprising:
a gasket (5) disposed between the first mounting stage (14) and the second mounting stage (41).
6. The backpressure-reducing drain device according to any one of claims 1 to 5, wherein the branch conduit (3) comprises a first pipe (31), one end of the first pipe (31) is communicated with the second connection port (12), and the other end of the first pipe (31) is disposed toward the end far away from the exhaust port (13).
7. The reduced back pressure exhaust apparatus according to claim 6, wherein the branch duct (3) further comprises a second pipe (32) communicating with the first pipe (31), the second pipe (32) being arranged in parallel with the laval nozzle (2) and being located at an end remote from the exhaust port (13).
8. A reduced back pressure discharge method for reducing the back pressure of a discharge device, characterized in that the discharge device comprises a main pipe (1), the reduced back pressure discharge method comprising:
a first connecting port (11), a second connecting port (12) and an exhaust port (13) are formed in the main pipeline (1);
adding a Laval nozzle (2), wherein one end of the Laval nozzle (2) is communicated with the first connecting port (11), and the other end of the Laval nozzle is configured to be used for installing a fan so as to generate negative pressure at the second connecting port (12);
a branch pipeline (3) is additionally arranged, and the branch pipeline (3) is communicated with the second connecting port (12);
the mounting sleeve (4) comprises a cylindrical rotating body and a conical rotating body, the cylindrical rotating body is connected with the outer wall of the inlet end (21) of the Laval nozzle (2), and the end part of the conical rotating body is connected with the outlet end (22) of the Laval nozzle (2).
9. The reduced back pressure venting method of claim 8, further comprising:
add installation sleeve (4), will installation sleeve (4) cover is established on Laval spray tube (2), and will installation sleeve (4) with trunk line (1) is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464876.4A CN110145390B (en) | 2019-05-30 | 2019-05-30 | Backpressure-reducing discharge device and backpressure-reducing discharge method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910464876.4A CN110145390B (en) | 2019-05-30 | 2019-05-30 | Backpressure-reducing discharge device and backpressure-reducing discharge method |
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| CN110145390A CN110145390A (en) | 2019-08-20 |
| CN110145390B true CN110145390B (en) | 2021-11-26 |
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| CN115596544B (en) * | 2022-10-26 | 2024-04-23 | 赛力斯集团股份有限公司 | Exhaust manifold for engine |
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| CN207905907U (en) * | 2018-01-05 | 2018-09-25 | 无锡威孚力达催化净化器有限责任公司 | Tailpipe with waste gas ejecting ash-clearing structure |
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| GB357906A (en) * | 1930-01-10 | 1931-10-01 | Benjamin Maurice Rochat | Improvements relating to silencers for internal combustion engines, of aeroplanes in particular |
| DE2220634A1 (en) * | 1972-04-27 | 1973-11-08 | Karl Maria Biehl | Exhaust gas purifier - with venturi tube and inclined air supply holes at narrowest section |
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| FR2689577A1 (en) * | 1992-04-02 | 1993-10-08 | Pidell Lucien | Fluid flow booster e.g. for i.c. engine intake or exhaust - consists of convergent pipe set at distance from end of intake pipe to create supplementary flow |
| JPH10238342A (en) * | 1997-02-25 | 1998-09-08 | Hirohiko Mizusawa | Device to improve exhaust efficiency of engine |
| SE516446C2 (en) * | 2000-05-22 | 2002-01-15 | Scania Cv Ab | Process and apparatus for exhaust gas recirculation in an internal combustion engine and such overcharged diesel engine |
| JP4526395B2 (en) * | 2004-02-25 | 2010-08-18 | 臼井国際産業株式会社 | Internal combustion engine supercharging system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1263892A1 (en) * | 1984-12-30 | 1986-10-15 | Алма-Атинский Энергетический Институт | Internal combustion engine exhaust system |
| JPH1172022A (en) * | 1997-08-28 | 1999-03-16 | Go Kan | Exhaust device of engine for mobile object |
| US7051524B1 (en) * | 2003-06-30 | 2006-05-30 | Bernard A Kraft | Venturi device |
| CN101245714A (en) * | 2008-03-18 | 2008-08-20 | 孙敏超 | Ejection air-supplying turbosupercharger |
| CN202125377U (en) * | 2011-05-25 | 2012-01-25 | 广西玉柴机器股份有限公司 | EGR (Exhaust Gas Recircualtion) system of diesel engine |
| CN207905907U (en) * | 2018-01-05 | 2018-09-25 | 无锡威孚力达催化净化器有限责任公司 | Tailpipe with waste gas ejecting ash-clearing structure |
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| CN110145390A (en) | 2019-08-20 |
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