CN116291810A - Hot patching device and tail gas aftertreatment ware - Google Patents
Hot patching device and tail gas aftertreatment ware Download PDFInfo
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- CN116291810A CN116291810A CN202310488704.7A CN202310488704A CN116291810A CN 116291810 A CN116291810 A CN 116291810A CN 202310488704 A CN202310488704 A CN 202310488704A CN 116291810 A CN116291810 A CN 116291810A
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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
- 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
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. This application has shunted tail gas, and the fractional part tail gas forms high temperature tail gas after getting into the ignitron by fuel heating from the tail gas inlet chamber earlier, and rethread ignitron enters into the collection pipe, and the direct collection pipe that gets into of heating of most tail gas then not through the ignitron, is heated in order to realize the whole rising of tail gas temperature through the heat transfer effect by high temperature tail gas. 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 aftertreatment device comprising the hot-fill device described above.
In the technical scheme of this application, a small portion tail gas gets into the ignitron from tail gas inlet chamber earlier, and after the fuel that the sprayer spouted to in the ignitron was lighted, this part tail gas was heated by the fuel of combustion state and is warmed up and form high temperature tail gas, then enters into the header through the ignitron, and most tail gas then gets into the header directly from tail gas inlet chamber and mixes with the high temperature tail gas after the intensification, utilizes the heat transfer effect to be heated by high temperature tail gas gradually in order to realize the whole improvement of tail gas temperature. That is, the exhaust gas is split, a small part of the exhaust gas participates in the combustion of fuel oil to heat, and a large part of the exhaust 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 improvement of the dynamic property of the engine is facilitated.
Drawings
Fig. 1 is a structural cross-sectional view 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 disclosure.
Fig. 3 is a schematic three-dimensional structure of a spoiler according to an embodiment of the disclosure.
FIG. 4 is a schematic diagram of the workflow 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 to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present 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 this 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 terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this 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 shows a cross-sectional view of a thermal remediation 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 present application; FIG. 3 illustrates a three-dimensional schematic view of a spoiler according to an embodiment of the present application; FIG. 4 illustrates a schematic workflow diagram of an exhaust aftertreatment device according to an embodiment of the present application.
Referring to fig. 1 and fig. 2 in combination, a thermal compensation device 1000 according to an embodiment of the present application is used in an exhaust gas post-processor, where the exhaust gas post-processor includes a housing 3. The hot patching device 1000 comprises a mixing module 100 and a spraying module 200, the mixing module 100 comprising a first direction F 1 A header 11 arranged in the box body 3, and a tail gas inlet cavity 4 communicated with the header 11 is defined between the box body 3 and the header 11; the injection module 200 comprises a squib 21, a pilot member 22 and an injector 23, the squib 21 being in a first direction F 1 At least partially penetrates through the box body 3 and is respectively communicated with the tail gas inlet cavity 4 and the collecting pipe 11; 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, in the first direction F 1 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 this application, shunted the tail gas, the burning heating of fuel in the little part tail gas participated in the ignitron 21, and the space inside the box 3 is walked to most tail gas is not heated, heats unheated low temperature tail gas by the high temperature tail gas after the heating again to realize the whole improvement of tail gas temperature. The traditional scheme is that all tail gas generated by the engine is 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 exhaust back pressure of the engine can be effectively reduced, and the dynamic performance of the engine is improved; 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, 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 utilization rate of hot-patch energy is also improved while the conversion efficiency of the exhaust gas post-processor to emission pollutants is 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 first partition board 5 sleeved on the collecting pipe 11 and in the first direction F 1 The upper second partition plate 6 is arranged at intervals, the tail gas inlet cavity 4 further comprises a second gas inlet cavity 42 formed between the first partition plate 5 and the second partition plate 6, and the second gas inlet cavity 42 is communicated with the first gas 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. Thus, about 80% of the total amount of the exhaust gasThe air flow of the ignition tube 21 is firstly introduced into the second air inlet cavity 42 from the first air inlet cavity 41 through the air vent hole on the first partition plate 5, then introduced into 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 header 11, and is converged with a small part of tail gas heated by fuel oil, so that the flow distribution, the collection 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 along the first direction F 1 Connected to the squib 21, the outlet porous plate 123 is arranged in a first direction F 1 Is connected to the air guide section 111. 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 jetting module 200 further includes a first direction F 1 An injector 23 seat detachably connected to the tank 3 and arranged coaxially with the header 11, the injector 23 being mounted to the injector 23 seat, and an end of the squib 21 facing away from the injector 23 being detachably connected to the header 11. It will be appreciated that, since the penetration distance and spray size of the various injectors 23 are different, the ignitron 21 and injector 23 seat are provided in a removable form to match the corresponding ignition zone in the ignitron 21, thereby facilitating removal and replacement to match the performance of the injectors 23And the matched specification is used for igniting at the optimal ignition position so as to improve 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 detection value T of the first temperature sensor 1 When the temperature is smaller than the first preset temperature value, the injector 23 injects fuel, the ignition element 22 ignites, and when the detection value T of the fourth temperature sensor 4 And a detection value T of a fifth temperature sensor 5 When the weighted value Tw of (2) is greater than the second preset temperature value, the injector 23 and the pilot member 22 are controlled to stop operating.
The hot patching device 1000 provided by the application divides the tail gas treated by the low-temperature reduction catalyst 81 into three parts, and the first part of tail gas passes throughThe air duct 7 enters the ignition tube 21, the fuel oil sprayed to the ignition tube 21 by the injector 23 can heat part of tail gas after being ignited by the ignition piece 22, and the heated tail gas then enters the mixed combustion layer inside the perforated tube 121 of the spoiler 12; the second part of tail gas is first introduced into the swirl zone formed by the outside of the porous pipe 121 and the inside of the second gas condensing section 113 of the collecting 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 is heated and raised, and then the two parts of high-temperature tail gas are heated along the first direction F 1 A first gas collection section 112 flowing to the header 11; 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 only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
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 an axial direction of the case.
2. The thermal remediation device of claim 1, further comprising:
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;
and 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.
3. The thermal remediation device of claim 2 further including a second baffle plate nested within the header and spaced from the first baffle plate in the first direction, the exhaust gas intake chamber further including a second intake chamber formed between the first baffle plate and the second baffle plate, the second intake chamber in communication with the first intake chamber;
the part of the collecting pipe 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.
4. A hot-fill apparatus as set forth in claim 3 wherein said header further comprises a second gas condensing section within said first gas inlet chamber, said second gas condensing section being located between said squib and said 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 guide section.
5. The hot patching device according to claim 4, wherein the spoiler comprises a porous tube coaxially arranged with the second gas condensing section, and a plurality of through holes are arrayed in the circumferential direction of the porous tube;
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.
6. The hot patching device of claim 5, 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.
7. The thermal remediation apparatus of claim 6 wherein the spoiler further comprises a plurality of swirl vanes disposed on a side of the perforated tube adjacent the inlet perforated plate, and wherein the plurality of swirl vanes are circumferentially spaced around the perforated tube.
8. The hot patching device of claim 7, wherein an included angle between the swirl vanes and a bus bar of the porous tube is not less than 60 °.
9. The thermal remediation device of any one of claims 1 to 8, 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.
10. A box-type aftertreatment device, characterized in that it comprises a hot-fill device according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310488704.7A CN116291810A (en) | 2023-05-04 | 2023-05-04 | Hot patching device and tail gas aftertreatment ware |
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| CN202310488704.7A CN116291810A (en) | 2023-05-04 | 2023-05-04 | Hot patching device and tail gas aftertreatment ware |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603361A (en) * | 2023-07-21 | 2023-08-18 | 天津市英格环保科技有限公司 | Waste gas treatment device for traditional Chinese medicine processing |
-
2023
- 2023-05-04 CN CN202310488704.7A patent/CN116291810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116603361A (en) * | 2023-07-21 | 2023-08-18 | 天津市英格环保科技有限公司 | Waste gas treatment device for traditional Chinese medicine processing |
| 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 |
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