CN116291810B - Hot patching device and tail gas aftertreatment ware - Google Patents
Hot patching device and tail gas aftertreatment ware Download PDFInfo
- Publication number
- CN116291810B CN116291810B CN202310488704.7A CN202310488704A CN116291810B CN 116291810 B CN116291810 B CN 116291810B CN 202310488704 A CN202310488704 A CN 202310488704A CN 116291810 B CN116291810 B CN 116291810B
- Authority
- CN
- China
- Prior art keywords
- tail gas
- inlet cavity
- air
- communicated
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000000295 fuel oil Substances 0.000 claims abstract description 13
- 238000005192 partition Methods 0.000 claims description 21
- 239000000446 fuel Substances 0.000 claims description 18
- 239000003054 catalyst Substances 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 238000005067 remediation Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 230000006872 improvement Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 117
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The application relates to a hot patching device, which comprises a mixing module and an injection module, wherein the mixing module comprises a collecting pipe arranged in a box body along a first direction, and a tail gas inlet cavity communicated with the collecting pipe is defined between the box body and the collecting pipe; the injection module comprises an ignition tube, an ignition piece and an injector, wherein the ignition tube at least partially penetrates into the box body along a first direction and is respectively communicated with the tail gas inlet cavity and the collection tube. The application divides the tail gas, a small part of the tail gas firstly enters the ignition tube from the tail gas inlet cavity and is heated by the fuel oil to form high-temperature tail gas, then enters the collection tube through the ignition tube, and a large part of the tail gas directly enters the collection tube without being heated by the ignition tube, so that the temperature of the tail gas is integrally increased by heating the high-temperature tail gas through a heat transfer effect. Meanwhile, most of tail gas does not participate in combustion heating of the ignition tube, so that exhaust back pressure of the engine is effectively reduced, and improvement of dynamic performance of the engine is facilitated.
Description
Technical Field
The application relates to the technical field of thermal management of tail gas aftertreatment of diesel engines, in particular to a hot patching device and a tail gas aftertreatment device.
Background
The diesel engine can discharge toxic gases such as carbon monoxide, nitrogen oxides and the like due to insufficient combustion, and the catalyst can be used for reducing the nitrogen oxides in the tail gas into pollution-free nitrogen and water, and the reduction reaction temperature is required to be 300-400 ℃. Under the cold start or low load working condition, if the temperature of the tail gas of the common diesel engine is difficult to meet the requirement, the temperature of the tail gas needs to be increased firstly and then catalytic reduction is carried out.
In the related art, in order to raise the exhaust temperature, a burner or other heating device is usually arranged outside the front end of the exhaust gas aftertreatment device for performing a hot-air compensation treatment. However, in the above structural design, the external arrangement is adopted, so that the cost is high, all the tail gas generated by the engine needs to pass through the burner and be heated in the burner, and the mixing device in the burner can fully mix the tail gas and the fuel oil to generate higher exhaust back pressure in the burner, which is not beneficial to the improvement of the engine power.
Disclosure of Invention
Accordingly, it is necessary to provide a thermal compensation device and an exhaust gas aftertreatment device for solving the problem of high exhaust back pressure generated by an external burner thermal compensation device.
According to one aspect of the present application, there is provided a thermal remediation device for an exhaust gas aftertreatment device, the exhaust gas aftertreatment device comprising a housing; the hot patching device comprises a mixing module and an injection module, wherein the mixing module comprises a collecting pipe arranged in the box body along a first direction, and a tail gas inlet cavity communicated with the collecting pipe is defined between the box body and the collecting pipe; the injection module comprises an ignition tube, an ignition piece and an injector, wherein the ignition tube at least partially penetrates into the box body along a first direction and is respectively communicated with the tail gas inlet cavity and the collection tube; the injector is towards the end of the ignitron far away from the collecting pipe so as to inject fuel into the ignitron; the ignition piece is arranged in the ignition tube and is used for igniting the fuel oil flowing into the ignition tube; wherein the first direction is parallel to the axial direction of the case.
In one embodiment, the hot patching device further comprises a first baffle plate and an air duct, the first baffle plate is sleeved on the collecting pipe, and the tail gas air inlet cavity comprises a first air inlet cavity formed between the first baffle plate and one side, close to the ignition tube, of the box body; one end of the air duct is communicated with the ignition tube, and the other end of the air duct is communicated with the first air inlet cavity.
In one embodiment, the hot patching device further comprises a second partition board sleeved on the collecting pipe and arranged at intervals with the first partition board in the first direction, the tail gas inlet cavity further comprises a second inlet cavity formed between the first partition board and the second partition board, and the second inlet cavity is communicated with the first inlet cavity; the portion of the header located in the second air inlet chamber includes an air guide section in communication with the squib and the second air inlet chamber, respectively, and a first air collection section in communication with the air guide section.
In one embodiment, the header further comprises a second gas gathering section located within the first gas inlet chamber, the second gas gathering section being located between the squib and the gas guiding section; the mixing module further comprises a spoiler arranged in the second gas condensation section, one end of the spoiler is communicated with the ignition tube, and the other end of the spoiler is communicated with the gas guiding section.
In one embodiment, the spoiler comprises a porous pipe coaxially arranged with the second gas condensation section, and a plurality of through holes are distributed in an array manner in the circumferential direction of the porous pipe; a swirl zone communicated with the first air inlet cavity is formed between the outer side of the porous pipe and the inner side of the second air condensing section, and a mixed combustion zone communicated with the swirl zone and the ignition tube respectively is formed on the inner side of the porous pipe.
In one embodiment, the spoiler further comprises an inlet porous plate and an outlet porous plate respectively connected to both ends of the porous tube; the inlet porous plate is connected to the squib in a first direction, and the outlet porous plate is connected to the gas guide section in the first direction.
In one embodiment, the spoiler further comprises a plurality of swirl blades arranged on one side of the perforated pipe close to the inlet perforated plate, and the swirl blades are circumferentially distributed at intervals around the perforated pipe.
In one embodiment, the swirl vanes are at an angle of no less than 60 ° to the generatrix of the perforated tube.
In one embodiment, the injection module further comprises an injector mount removably connected to the tank in the first direction and coaxially disposed with the header, the injector being mounted to the injector mount, and an end of the squib facing away from the injector being removably connected to the header.
According to another aspect of the present application, there is provided an exhaust gas aftertreatment device comprising the hot-fill device described above.
In the technical scheme of the application, a small part of tail gas firstly enters the ignition tube from the tail gas air inlet cavity, after fuel oil sprayed into the ignition tube by the ejector is ignited, the part of tail gas is heated by the fuel oil in a burning state to form high-temperature tail gas, then enters the collecting pipe through the ignition tube, and most of tail gas directly enters the collecting pipe from the tail gas air inlet cavity to be mixed with the high-temperature tail gas after temperature rise, and is gradually heated by the high-temperature tail gas by utilizing the heat transfer effect so as to realize the integral improvement of the tail gas temperature. The tail gas is split, a small part of the tail gas participates in the combustion of the fuel oil to heat, and a large part of the tail gas flows into the space inside the box body and directly enters the collecting pipe without being heated by the ignition tube, so that the exhaust back pressure of the engine is effectively reduced, and the power performance of the engine is improved.
Drawings
Fig. 1 is a structural cross-sectional view of a hot patching device according to an embodiment of the application.
Fig. 2 is a schematic three-dimensional structure of a thermal compensation device according to an embodiment of the application.
Fig. 3 is a schematic three-dimensional structure of a spoiler according to an embodiment of the application.
FIG. 4 is a schematic diagram of the operation of an exhaust aftertreatment device according to an embodiment of the present disclosure.
Reference numerals:
A hot patching device 1000;
a mixing module 100; a header 11; an air guide section 111; a first gas gathering section 112; a second condensing section 113;
a spoiler 12; a perforated tube 121; an inlet perforated plate 122; an outlet porous plate 123; swirl vanes 124;
a spray module 200; a squib 21; a pilot element 22; an ejector 23; an injector mount 24;
a case 3; a tail gas inlet cavity 4; a first air intake chamber 41; a second air intake chamber 42;
A first separator 5; a second separator 6; an air duct 7;
An air inlet pipe 8; a low-temperature reduction catalyst 81; a hoop 9;
first direction F 1.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
As described in the background art, in the conventional structural design, all exhaust gas generated by an engine needs to pass through a burner and be heated in the burner, and a mixing device in the burner can also cause higher exhaust back pressure in order to enable the exhaust gas and fuel to be fully mixed, so that the improvement of the power performance of the engine is not favored.
Accordingly, it is necessary to provide a hot-air make-up device and an exhaust gas aftertreatment device for an external burner, which solve the problem of high exhaust gas back pressure.
FIG. 1 is a cross-sectional view showing the construction of a hot patching device according to an embodiment of the present application; FIG. 2 is a schematic three-dimensional structure of a thermal compensation device according to an embodiment of the application; FIG. 3 is a schematic three-dimensional view of a spoiler according to an embodiment of the application; FIG. 4 illustrates a schematic workflow diagram of an exhaust aftertreatment device in accordance with an embodiment of the application.
Referring to fig. 1 and 2 in combination, a thermal compensation device 1000 according to an embodiment of the present application is used in an exhaust gas post-processor, and the exhaust gas post-processor includes a housing 3. The hot patching device 1000 comprises a mixing module 100 and an injection module 200, wherein the mixing module 100 comprises a collecting pipe 11 arranged in a box body 3 along a first direction F 1, and an exhaust gas inlet cavity 4 communicated with the collecting pipe 11 is defined between the box body 3 and the collecting pipe 11; the injection module 200 comprises a squib 21, a pilot member 22 and an injector 23, wherein the squib 21 at least partially penetrates into the box body 3 along a first direction F 1 and is communicated with the tail gas inlet cavity 4 and the header 11 respectively; the injector 23 is directed toward the end of the squib 21 remote from the header 11 to inject fuel into the squib 21, and the pilot member 22 is provided in the squib 21 for igniting the fuel flowing into the squib 21; wherein the first direction F 1 is parallel to the axial direction of the case 3.
On the one hand, a small part of tail gas firstly enters the ignition tube 21 from the tail gas inlet cavity 4, after the fuel oil sprayed into the ignition tube 21 by the injector 23 is ignited, the part of tail gas is heated by the fuel oil in a burning state to form high-temperature tail gas, then enters the collecting pipe 11 through the ignition tube 21, and most of tail gas directly enters the collecting pipe 11 from the tail gas inlet cavity 4 and is gradually heated by the high-temperature tail gas by utilizing a heat transfer effect after being mixed with the high-temperature tail gas. That is, in the scheme of the application, the tail gas is split, a small part of the tail gas participates in the combustion heating of the fuel oil in the ignition tube 21, a large part of the tail gas does not heat the space in the box body 3, and the unheated low-temperature tail gas is heated by the heated high-temperature tail gas, so that the overall improvement of the temperature of the tail gas is realized. In the traditional scheme, all tail gas generated by the engine is required to be heated in the burner and then discharged, and most of the tail gas in the application does not pass through the heating of the ignitron and directly enters the collecting pipe. Experimental results show that the exhaust back pressure of the traditional scheme is about 8-10KPa, and the exhaust back pressure in the application is about 2-3KPa, so that compared with the traditional scheme, the application can effectively reduce the exhaust back pressure of the engine, and is beneficial to improving the dynamic property of the engine; in another aspect, the mixing module 100 and the injection module 200 are integrated in the box body 3 of the exhaust gas post-processor, and the ignition tube 21 is respectively communicated with the exhaust gas inlet cavity 4 and the collecting pipe 11, so that heat loss caused by heat dissipation of an external exhaust pipe can be effectively reduced, the temperature of the whole exhaust gas post-processor can be synchronously and rapidly increased by redundant heat after combustion, rapid initiation of a catalyst is facilitated, and the conversion efficiency of the exhaust gas post-processor to discharged pollutants is improved, and meanwhile, the utilization rate of hot-patch energy is also improved.
As an implementation manner, in particular to the embodiment shown in fig. 1 and 2, the hot patching device 1000 further comprises a first partition board 5 and an air duct 7, the first partition board 5 is sleeved on the collecting pipe 11, and the tail gas inlet cavity 4 comprises a first air inlet cavity 41 formed between the first partition board 5 and one side of the box body 3 close to the ignition tube 21; one end of the air duct 7 is communicated with the squib 21, and the other end is communicated with the first air inlet cavity 41. For example, one end of the air duct 7 is open to a bowl-shaped structure and faces the tail gas advancing direction in the first air inlet cavity 41, so as to supplement air to the injection module 200 as much as possible by means of air flow inertia, or directly take air from the engine air compressor and connect with the air duct 7, thereby improving the uniformity of oil-gas mixture and promoting complete combustion of fuel.
Further, the hot patching device 1000 further comprises a second partition board 6 sleeved on the collecting pipe 11 and arranged at intervals with the first partition board 5 in the first direction F 1, the tail gas inlet cavity 4 further comprises a second inlet cavity 42 formed between the first partition board 5 and the second partition board 6, and the second inlet cavity 42 is communicated with the first inlet cavity 41; the portion of the header 11 located within the second air intake chamber 42 includes an air guide section 111 in communication with the squib 21 and the second air intake chamber 42, respectively, and a first air collection section 112 in communication with the air guide section 111. In this way, about 80% of the air flow in the total amount of the tail gas enters the second air inlet cavity 42 from the first air inlet cavity 41 through the air vent hole on the first partition board 5, then enters the first air gathering section 112 from the second air inlet cavity 42 through the through hole on the air guide section 111 of the gathering pipe 11, and is converged with a small part of the tail gas heated by the fuel oil in the ignition tube 21, so that the flow distribution, the gathering and the heating of the tail gas are realized, and the exhaust back pressure is effectively reduced while the heating and the temperature rise of the tail gas are realized.
Optionally, the size of the vent hole provided in the second partition 6 is set according to the engine displacement matched with the exhaust gas aftertreatment device, so that about 80% of exhaust gas can flow from the first air inlet cavity 41 to the second air inlet cavity 42 through the vent hole in the second partition 6.
Optionally, through holes are formed around the air guide section 111 of the collecting pipe 11, and the flow guiding area of the through holes is larger than that of the smallest pipe diameter in the exhaust gas post-processor, so that the exhaust gas in the second air inlet cavity 42 is effectively ensured to enter the first air collecting section 112 from the second air inlet cavity 42 through the through holes of the air guide section 111.
In some embodiments, as a preferred embodiment, header 11 further includes a second condensing section 113 positioned within first air intake chamber 41, second condensing section 113 positioned between squib 21 and air duct section 111; the mixing module 100 further includes a spoiler 12 disposed in the second air condensing section 113, wherein one end of the spoiler 12 is connected to the squib 21, and the other end is connected to the air guiding section 111. In this way, the exhaust gas in the first air intake chamber 41 can be further split, so that about 5% -10% of the exhaust gas can be split into the spoiler 12, thereby further reducing the exhaust back pressure.
Specifically, the spoiler 12 includes a perforated tube 121 coaxially disposed with the second air condensing section 113, the perforated tube 121 having a plurality of through holes arrayed in a circumferential direction thereof; a swirling area communicating with the first air intake chamber 41 is formed between the outside of the perforated tube 121 and the inside of the second gas condensing section 113, and a mixed combustion area communicating with the swirling area and the squib 21, respectively, is formed at the inside of the perforated tube 121. It will be appreciated that after the perforated pipe 121 of the spoiler 12 and the second air condensing section 113 of the header 11 are coaxially disposed, an annular swirling flow area can be formed between the outer side of the perforated pipe 121 and the inner side of the second air condensing section 113, so that the tail gas of the first air intake chamber 41 can rotate around the header 11 after being swirled, and the tail gas entering the header 11 from the ignition pipe 21 to mix with the combustion area and carrying fuel can effectively improve the mixing effect and heat release efficiency of the tail gas and the fuel under the action of the rotating air flow of the through holes on the perforated pipe 121 and the swirling flow area, thereby avoiding the generation of harmful substances due to incomplete combustion of the fuel.
Further, the spoiler 12 further includes an inlet porous plate 122 and an outlet porous plate 123 respectively connected to both ends of the porous tube 121; the inlet perforated plate 122 is connected to the squib 21 in the first direction F 1 and the outlet perforated plate 123 is connected to the air guide section 111 in the first direction F 1. Thus, the exhaust gas in the first gas inlet cavity 41 can further scatter the gas flow when entering the mixed combustion zone through the inlet porous plate 122, so that the effect of oil-gas mixing is enhanced, the combustion efficiency is improved, and the outlet porous plate 123 also has the effect of blocking part of combustion flame, so that the catalyst damage caused by the channeling of open flame into the catalyst inlet is prevented, and the exhaust gas treatment effect is affected.
In some embodiments, it should be noted that the spoiler 12 further includes a plurality of swirl blades 124 disposed on a side of the porous tube 121 near the inlet porous plate 122, and the plurality of swirl blades 124 are circumferentially spaced around the porous tube 121. In this way, a proper blowing angle can be set when the tail gas in the first air inlet cavity 41 enters the cyclone layer, so that the cyclone strength of the tail gas in the cyclone layer is improved.
Optionally, the included angle between the swirl vanes 124 and the bus bar of the perforated tube 121 is not less than 60 ° to ensure the swirl strength of the airflow.
In some embodiments, the injection module 200 further comprises an injector 23 seat removably connected to the tank 3 in the first direction F 1 and arranged coaxially with the header 11, the injector 23 being mounted to the injector 23 seat, the end of the squib 21 facing away from the injector 23 being removably connected to the header 11. It will be appreciated that, since the penetration distance and spray size etc. of the different injectors 23 are different, the squib 21 and the injector 23 seat are provided in a removable form for matching the ignition region in the corresponding squib 21, so as to facilitate the removal and replacement to a specification matching the performance of the injectors 23, and ignition is performed at an optimal ignition position to enhance the ignition efficiency. Meanwhile, considering that the spoiler 12 also has a matching problem, the spoiler 12 is replaced by a matching specification through the detachable anchor ear 9, so that the whole injection module 200 is replaced in a detachable manner, and the application range of the hot patching device 1000 is widened.
In some embodiments, the air inlet pipe 8 is arranged in a double parallel manner in consideration of exhaust back pressure, exhaust gas flow and effective utilization of space in the tank 3, the air inlet pipe 8 is arranged at two opposite sides of the collecting pipe 11 in the tank 3, the low-temperature reduction catalyst 81 is encapsulated in the air inlet pipe 8, and the exhaust gas enters the first air inlet cavity 41 after reduction catalysis. Furthermore, in view of future upgrades, upgrade space for future technical solutions is reserved in the air inlet pipe 8.
In some embodiments, the injection module 200 may be directly replaced by a six HC nozzle, the injected fuel and the exhaust gas are fully mixed in the header 11 and the spoiler 12, the exhaust gas with the fuel enters the DOC at the rear end of the header 11, the exhaust gas is heated after being oxidized by the DOC, and the heated exhaust gas enters the DPF to realize active regeneration of the DPF. For DPF regeneration, the spoiler 12 may be replaced with an exhaust mixing device dedicated to a six HC nozzle.
Further, the fuel injection of the injector 23 and the ignition of the ignition part 22 are controlled by the engine control unit, and the first sensor, the fourth sensor and the fifth temperature sensor of the exhaust gas post-processor are combined to judge whether to perform active hot patching on the exhaust gas temperature, selectively inject quantitative fuel and control the ignition frequency, so as to realize heating of the exhaust gas after fuel combustion. A heating control strategy may be preferred: when the detected value T 1 of the first temperature sensor is smaller than the first preset temperature value, the injector 23 injects fuel and the pilot element 22 ignites, and when the weighted value Tw of the detected value T 4 of the fourth temperature sensor and the detected value T 5 of the fifth temperature sensor is larger than the second preset temperature value, the injector 23 and the pilot element 22 are controlled to stop working.
According to the hot patching device 1000 provided by the application, the tail gas treated by the low-temperature reduction catalyst 81 is split into three parts, the first part of tail gas enters the ignition tube 21 through the gas guide tube 7, the fuel oil sprayed to the ignition tube 21 by the injector 23 can heat the part of tail gas after being ignited by the ignition piece 22, and the heated tail gas then enters the mixed combustion layer at the inner side of the porous tube 121 of the spoiler 12; the second part of tail gas firstly enters a swirl zone formed by the outer side of the porous pipe 121 and the inner side of the second gas gathering section 113 of the gathering pipe 11, then enters the inner mixed combustion layer through the through holes on the porous pipe 121, is fully mixed with the tail gas carrying fuel oil, and then is heated and warmed, and then the two parts of high-temperature tail gas flows to the first gas gathering section 112 of the gathering pipe 11 along the first direction F 1; the third part of the tail gas enters the second air inlet cavity 42 from the first air inlet cavity 41 through the through holes on the first partition board 5, then enters the first air collecting section 112 of the collecting pipe 11 from the second air inlet cavity 42 through the through holes on the air guiding section 111 of the collecting pipe 11, finally merges with the high-temperature tail gas reaching the first air collecting section 112, is heated by the high-temperature tail gas through the heat transfer effect, and effectively reduces the back pressure of the exhaust while realizing the integral heating and temperature rise of the tail gas. In addition, the mode of relevant module integration in box 3 is inside can reduce effectively because of external blast pipe heat dissipation leads to the heat loss, and unnecessary heat after the burning can promote whole tail gas aftertreatment ware's temperature fast in step, is favorable to the catalyst to take off the fire fast, when improving tail gas aftertreatment ware to emission pollutant conversion efficiency, has also improved the utilization ratio of hot patching energy.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. The hot patching device is used for a tail gas aftertreatment device and is characterized in that the tail gas aftertreatment device comprises a box body; the hot patching device includes:
The mixing module comprises a collecting pipe arranged in the box body along a first direction, and an exhaust gas inlet cavity communicated with the collecting pipe is defined between the box body and the collecting pipe;
The injection module comprises a squib, a pilot element and an injector, wherein the squib at least partially penetrates into the box body along the first direction and is respectively communicated with the tail gas inlet cavity and the header pipe; the injector faces towards one end of the ignitron far away from the collecting pipe so as to inject fuel into the ignitron;
the ignition piece is arranged in the ignition tube and is used for igniting the fuel oil flowing into the ignition tube;
Wherein the first direction is parallel to the axial direction of the box body;
The hot patching device further comprises:
The first partition board is sleeved on the collecting pipe, and the tail gas inlet cavity comprises a first gas inlet cavity formed between the first partition board and one side, close to the ignition tube, of the box body;
one end of the air duct is communicated with the ignition tube, and the other end of the air duct is communicated with the first air inlet cavity;
The hot patching device further comprises a second partition board sleeved on the collecting pipe and arranged at intervals in the first direction with the first partition board, the tail gas inlet cavity further comprises a second gas inlet cavity formed between the first partition board and the second partition board, and the second gas inlet cavity is communicated with the first gas inlet cavity;
The part of the collecting pipe positioned in the second air inlet cavity comprises an air guide section communicated with the ignition tube and the second air inlet cavity respectively, and a first air collecting section communicated with the air guide section;
the header further includes a second gas condensing section within the first gas inlet chamber, the second gas condensing section being located between the squib and the gas guide section;
The mixing module further comprises a spoiler arranged in the second gas condensation section, one end of the spoiler is communicated with the ignition tube, and the other end of the spoiler is communicated with the gas guide section;
the spoiler comprises a porous pipe coaxially arranged with the second gas condensation section, and a plurality of through holes are distributed in an array manner in the circumferential direction of the porous pipe;
A swirl zone communicated with the first air inlet cavity is formed between the outer side of the porous pipe and the inner side of the second air condensing section, and a mixed combustion zone communicated with the swirl zone and the ignition tube respectively is formed on the inner side of the porous pipe.
2. The hot-patch device according to claim 1, wherein one end of the air duct is open to a bowl-like structure and faces the direction of the exhaust gas advancing in the first air intake chamber.
3. The hot patching device of claim 1, wherein the spoiler further comprises an inlet porous plate and an outlet porous plate respectively connected to both ends of the porous tube;
The inlet porous plate is connected to the squib in the first direction, and the outlet porous plate is connected to the air guide section in the first direction.
4. The hot patching device of claim 3, wherein the spoiler further comprises a plurality of swirl vanes disposed on a side of the porous tube adjacent to the inlet porous plate, and the plurality of swirl vanes are circumferentially spaced around the porous tube.
5. The hot patching device of claim 4, wherein an included angle between the swirl vanes and a bus bar of the porous tube is not less than 60 °.
6. The thermal remediation device of any one of claims 1 to 5, wherein the spray module further includes a sprayer mount removably connected to the tank in the first direction and disposed coaxially with the header, the sprayer being mounted to the sprayer mount;
the end of the squib facing away from the injector is detachably connected to the header.
7. The hot patching device of claim 6, further comprising an air inlet pipe, wherein the air inlet pipe is arranged in double parallel, the air inlet pipe is arranged at two opposite sides of the collecting pipe in the box body, a low-temperature reduction catalyst is packaged in the air inlet pipe, and tail gas enters the first air inlet cavity after reduction catalysis.
8. The thermal remediation device of claim 6 wherein fuel injection from the injector and ignition of the pilot is controlled by an engine control unit, in combination with a first temperature sensor, a fourth temperature sensor, and a fifth temperature sensor of the exhaust aftertreatment device, to determine whether to actively thermally remediate the exhaust gas temperature, to selectively inject a metered amount of fuel, and to control the ignition frequency.
9. The hot-fill apparatus according to claim 8, wherein the injector injects the fuel and the pilot member ignites when the detection value of the first temperature sensor is smaller than a first preset temperature value, and wherein the injector and the pilot member are controlled to stop operating when the weighted value of the detection value of the fourth temperature sensor and the detection value of the fifth temperature sensor is larger than a second preset temperature value.
10. A box-type aftertreatment device, characterized in that it comprises a hot-fill device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310488704.7A CN116291810B (en) | 2023-05-04 | 2023-05-04 | Hot patching device and tail gas aftertreatment ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310488704.7A CN116291810B (en) | 2023-05-04 | 2023-05-04 | Hot patching device and tail gas aftertreatment ware |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116291810A CN116291810A (en) | 2023-06-23 |
| CN116291810B true CN116291810B (en) | 2024-06-04 |
Family
ID=86787281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310488704.7A Active CN116291810B (en) | 2023-05-04 | 2023-05-04 | Hot patching device and tail gas aftertreatment ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116291810B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603361B (en) * | 2023-07-21 | 2023-09-26 | 天津市英格环保科技有限公司 | Waste gas treatment device for traditional Chinese medicine processing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263594A (en) * | 2003-02-28 | 2004-09-24 | Calsonic Kansei Corp | Diesel particulate filter device |
| JP2010275905A (en) * | 2009-05-27 | 2010-12-09 | Sumitomo (Shi) Construction Machinery Co Ltd | Dpf self-regeneration assisting device for construction machine |
| CN208106531U (en) * | 2018-03-06 | 2018-11-16 | 黄育新 | A kind of burner for dpf regeneration |
| CN208534579U (en) * | 2018-06-28 | 2019-02-22 | 中自环保科技股份有限公司 | A kind of burner for dpf regeneration |
| CN110067619A (en) * | 2019-05-09 | 2019-07-30 | 平原滤清器有限公司 | Diesel fuel burner and temperature raising method for DPF temperature raising |
-
2023
- 2023-05-04 CN CN202310488704.7A patent/CN116291810B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004263594A (en) * | 2003-02-28 | 2004-09-24 | Calsonic Kansei Corp | Diesel particulate filter device |
| JP2010275905A (en) * | 2009-05-27 | 2010-12-09 | Sumitomo (Shi) Construction Machinery Co Ltd | Dpf self-regeneration assisting device for construction machine |
| CN208106531U (en) * | 2018-03-06 | 2018-11-16 | 黄育新 | A kind of burner for dpf regeneration |
| CN208534579U (en) * | 2018-06-28 | 2019-02-22 | 中自环保科技股份有限公司 | A kind of burner for dpf regeneration |
| CN110067619A (en) * | 2019-05-09 | 2019-07-30 | 平原滤清器有限公司 | Diesel fuel burner and temperature raising method for DPF temperature raising |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116291810A (en) | 2023-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5740056B2 (en) | burner | |
| EP2388451B1 (en) | Exhaust purification apparatus for internal combustion engine | |
| US5934073A (en) | Auxiliary heating for motor vehicles with internal combustion engines | |
| JP5086199B2 (en) | Plasma burner and smoke filter | |
| JP6084605B2 (en) | Burner and filter regeneration device | |
| ES2542145T3 (en) | System of reduction of particulate materials in exhaust gases | |
| KR100866327B1 (en) | Plasma burner and diesel particulate filter trap | |
| CN116291810B (en) | Hot patching device and tail gas aftertreatment ware | |
| CN106287708B (en) | Catalytic burner and gas heater with it | |
| JP2008031955A (en) | Diesel engine | |
| BRPI0905379B1 (en) | self-ignition internal combustion engine and method for the disinfection of combustion air ether in a self-igniting internal combustion engine for vehicles | |
| CN103256105B (en) | Catalyst for waste gas heat-storage combustion and circular combustion of engine | |
| CN110822420B (en) | Combustion chamber structural assembly | |
| CN208845282U (en) | Constant temperature cracker and vehicle | |
| CN109026450A (en) | Constant temperature cracker and vehicle | |
| CN209818144U (en) | Diesel burner for temperature raising of DPF | |
| JP2955273B1 (en) | Black smoke removal device | |
| CN112944674A (en) | High-efficient gas heating boiler | |
| CN108194234B (en) | A kind of exhaust gas circulating device carrying out methanol decomposition using engine exhaust heat | |
| KR100866328B1 (en) | Plasma burner and diesel particulate filter trap | |
| KR100866331B1 (en) | Plasma burner and diesel particulate filter trap | |
| CN110067619A (en) | Diesel fuel burner and temperature raising method for DPF temperature raising | |
| CN220720769U (en) | Porous medium parking heater | |
| CN216667977U (en) | High-efficient gas heating boiler | |
| CN220227011U (en) | SCR mixer with flue gas heating function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |