CN209818144U - Diesel burner for temperature raising of DPF - Google Patents
Diesel burner for temperature raising of DPF Download PDFInfo
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- CN209818144U CN209818144U CN201920661160.9U CN201920661160U CN209818144U CN 209818144 U CN209818144 U CN 209818144U CN 201920661160 U CN201920661160 U CN 201920661160U CN 209818144 U CN209818144 U CN 209818144U
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 32
- 238000009792 diffusion process Methods 0.000 claims description 79
- 238000005192 partition Methods 0.000 claims description 24
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000010792 warming Methods 0.000 claims 2
- 230000008929 regeneration Effects 0.000 abstract description 22
- 238000011069 regeneration method Methods 0.000 abstract description 22
- 239000007789 gas Substances 0.000 description 45
- 239000003921 oil Substances 0.000 description 43
- 239000003595 mist Substances 0.000 description 14
- 239000002283 diesel fuel Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Processes For Solid Components From Exhaust (AREA)
Abstract
The utility model discloses a diesel burner for DPF temperature raising, which comprises a shell, wherein the side wall of the shell is connected with an air inlet pipe, and the shell is connected with a combustion chamber through a flange structure; the combustion chamber comprises an outer cavity cover and an inner cavity cover; the oil inlet of the inner cavity cover is connected with the outer cavity cover; the outer cavity cover is fixedly connected with an oil nozzle, and the oil nozzle extends into the oil inlet; an air inlet annular cavity is arranged between the inner cavity cover and the outer cavity cover, and an air inlet is formed in the side wall of the inner cavity cover; the outer cavity cover is communicated with a hot gas inlet end of the shell, and a gas guide pipe and an ignition plug are connected to the side wall of the outer cavity cover. The utility model discloses the success rate of igniteing is high, and the air current can not blow out flame, and the ignition plug is longe-lived, has practiced thrift and has set up water-cooled structure and cost, guarantees that the temperature condition of regeneration is even stable.
Description
Technical Field
The utility model relates to a diesel engine tail gas treatment technical field specifically is a diesel burner that is used for BR-DPF to carry temperature.
Background
The diesel engine is a machine for converting heat generated by diesel combustion into kinetic energy, and has high heat conversion efficiency, large torque and good economic performance, so that the diesel engine is widely applied.
When the diesel engine is operated, a large amount of PM (black smoke particles), HC and NO are generatedXAnd PM is a significant contributor to diesel engine emissions. The most effective way to treat PM at present is BR-DPF (diesel combustor regeneration particulate trap), which can intercept more than 90% of the particulate matters generated by the engine and re-combust the particulate matters intercepted in the BR-DPF by two ways, namely active regeneration and passive regeneration, thereby eliminating the particulate matters. The DPF active regeneration refers to a technology of injecting fuel oil in the DPF to assist combustion and promote DPF regeneration; DPF passive regeneration refers to a technique that relies only on engine exhaust heat to regenerate the DPF.
The BR-DPF System developed and produced by plain Filter, Inc. is an exhaust gas aftertreatment System product for filtering and trapping black smoke Particles (PM) discharged by diesel vehicles or machines and regenerating by means of diesel burners. The most effective working temperature of the system is about 550 ℃, when the diesel engine works for a long time at idle speed, the exhaust temperature cannot reach the ideal regeneration temperature, the intercepted particulate matters cannot be combusted, the exhaust back pressure of the engine can be gradually increased along with the increase of the particulate matters of the BR-DPF, and the performance of the engine can be gradually reduced or even flameout.
The current popular temperature raising method is as follows: the temperature is increased by electrical heating, the temperature is increased by a burner and the temperature is increased by spraying diesel oil, but the requirement of the electrical heating on an onboard power supply is high, and the universality is not strong; the temperature raising range of the burner is wide, for example, Chinese patent 201210159714 discloses a DPF controllable regeneration system of an engine using the burner. However, in the existing market, when the working condition of an engine suddenly changes, flame is easy to extinguish, the probability of ignition failure is high, unstable components in diesel oil can react at a certain temperature, and if no water is cooled, colloid or resin-like sticky substances can be formed to block an oil nozzle; if no additional air is available, the temperature field distribution is uneven, resulting in regeneration failure; the technical scheme of the diesel oil injection temperature raising cannot be regenerated under all working conditions, the injection quantity of the diesel oil cannot be accurately controlled, the diesel oil injection is too little, the temperature cannot be effectively raised, the oil consumption can be increased due to too much injection, and the incompletely combusted diesel oil can also cause secondary pollution to the environment.
Once the BR-DPF is completely blocked, the exhaust back pressure of the engine can be sharply increased and even the engine can be shut down, at the moment, the BR-DPF needs to be detached for off-line regeneration, so that the normal work of the engine can be influenced, the normal working schedule can be influenced, the maintenance cost can be increased by the off-line regeneration, and the adverse effect can be brought to a producer.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a diesel burner for DPF carries temperature, the commonality is strong, and the success rate of igniteing is high, no secondary pollution.
In order to achieve the purpose, the diesel burner for temperature raising of the DPF comprises a shell, wherein one end of the shell is an air outlet end and the other end of the shell is a hot air inlet end for hot air to enter along the axial direction; the side wall of the shell adjacent to the hot gas inlet end is connected with an air inlet pipe, and the shell is connected to an engine exhaust pipe in series through the air inlet pipe and an air outlet end;
the hot gas inlet end of the shell is connected with a combustion chamber through a flange structure; the combustion chamber comprises an outer cavity cover and an inner cavity cover, the inner cavity cover is positioned in the outer cavity cover, and the inner cavity cover, the outer cavity cover and the shell are coaxially arranged;
along the axial direction of the shell, one end of the inner cavity cover is an oil inlet end and the other end of the inner cavity cover is a hot air outlet; the oil inlet end is connected with an oil inlet which is connected with the outer cavity cover; the outer cavity cover is fixedly connected with an oil nozzle, and the oil nozzle extends into the oil inlet; an air inlet annular cavity is arranged between the inner cavity cover and the outer cavity cover, an air inlet is formed in the side wall of the inner cavity cover, and the air inlet is communicated with the air inlet annular cavity; a hot gas outlet of the inner cavity cover extends radially to form a convex ring, and the convex ring is connected with the inner wall of the outer cavity cover;
the outer cavity cover at the hot gas outlet is communicated with the hot gas inlet end of the shell through the flange structure, the side wall of the outer cavity cover is connected with a gas-guiding pipe and an ignition plug, the ignition plug extends into the inner cavity cover, one end of the gas-guiding pipe is communicated with the gas-inlet annular cavity, and the other end of the gas-guiding pipe is communicated with the gas inlet pipe.
The air inlet pipe is connected with an air inlet flange, and the air outlet end of the shell is connected with an air outlet flange; the air inlet is provided with two, and two air inlets are located the top and the bottom of inner chamber cover respectively.
A flow equalizing structure is arranged in the shell;
the flow equalizing structure comprises a diffusion inner cylinder, a diffusion outer cylinder and a diffusion partition plate, wherein the diffusion inner cylinder, the diffusion outer cylinder and the diffusion partition plate are coaxially arranged with the shell; the diffusion inner cylinder is positioned between the diffusion partition plate and the hot gas inlet end of the shell, one end of the diffusion inner cylinder is communicated with the hot gas outlet of the inner cavity cover, and the other end of the diffusion inner cylinder is connected with the diffusion partition plate; diffusion holes are uniformly distributed on the diffusion partition plate;
the middle part of the diffusion inner cylinder is radially protruded to form an expanding part, the diffusion inner cylinders on two sides of the expanding part are respectively a first cylinder section and a third cylinder section, and the expanding part is a second cylinder section; air holes are respectively formed in the outer walls of the first cylinder section, the second cylinder section and the third cylinder section along the circumferential direction, and the air holes are uniformly distributed on the outer wall of the third cylinder section; a plurality of first flow disturbing holes are distributed on a step surface formed at the joint of the first cylinder section and the second cylinder section;
the diffusion outer cylinder is covered on the third cylinder section and is connected with the diffusion partition plate; the end part of the diffusion outer cylinder extends inwards and radially to form an annular connecting plate which is connected with the diffusion inner cylinder; a plurality of second flow disturbing holes are circumferentially distributed on the annular connecting plate, and a plurality of third flow disturbing holes are circumferentially distributed on the surface of the diffusion outer cylinder; spoilers are arranged at the first spoiling hole, the second spoiling hole and the third spoiling hole; an upstream air cavity is formed by the inner wall of the shell, the inner diffusion cylinder, the outer diffusion cylinder and the surface of one side of the diffusion partition plate, and a downstream air cavity is formed by the surface of the other side of the diffusion partition plate and the shell.
The flow equalizing structure also comprises a spoiler arranged in the downstream air cavity;
the spoiler comprises a spoiler cylinder, wherein the middle part of the axial end face of the spoiler cylinder is provided with a through hole, and spoiler pieces are uniformly distributed on the circumferential surface of the spoiler cylinder.
An air inlet temperature sensor seat and an air inlet pressure difference sensor seat are arranged at the air inlet pipe; a combustion temperature sensor is arranged at the position of the inner cavity cover of the combustion chamber, a mixed gas temperature sensor seat is arranged at the position of the downstream cavity at the upstream side of the turbulator, and an air outlet pressure difference sensor seat is arranged at the position of the downstream cavity at the downstream side of the turbulator.
The utility model discloses have following advantage:
when the device works, gas in the air inlet pipe enters the air inlet annular cavity through the air guide pipe, cannot be directly blown to flame, but enters the inner cavity cover through the air inlet to participate in combustion, so that the oxygen supply required by flame combustion can be ensured, meanwhile, the air flow is prevented from directly blowing the flame, and the flame cannot be blown out when the exhaust volume of an engine of a motor vehicle is changed.
The diesel oil is easy to atomize after being sprayed out from the oil nozzle with higher pressure, the oil mist is distributed in a conical shape, the ignition is easier when the oil mist concentration is higher under the condition of sufficient oxygen content, but the oil mist wets the ignition plug due to the fact that the distance between the ignition plug and the oil nozzle is too small, and the problems of carbon deposition, difficult ignition, shortened service life of the ignition plug and the like are caused. The utility model discloses well oil mist concentrates in inner chamber cover, and oil mist concentration obtains improving in the past, and the ignition plug need not too be close to the fuel sprayer, has avoided the oil mist to drench the problem that the ignition plug brought, has improved oil mist concentration, and the success rate of igniteing obtains obviously promoting in the past relatively, and furthest has prolonged the life-span of ignition plug, has good economic efficiency and excellent user experience.
The outer cavity cover and the inner cavity cover divide the combustion chamber into a low-temperature area (air inlet annular cavity) and a high-temperature area (inside the inner cavity cover), and the oil nozzle cannot be blocked by colloidal or resin-shaped sticky substances without water cooling, so that the structure and the cost for water cooling are saved. The utility model discloses a diesel burner job stabilization for DPF raises temperature can be in the steady operation when any operating mode at motor vehicle engine, guarantees to provide the gas of sufficient regeneration with the temperature for BR-DPF device, avoids the regeneration failure to lead to BR-DPF to block up completely, need not off-line regeneration, reduces the maintenance cost, does not influence the normal use of motor vehicle because of off-line regeneration.
The setting of flange and the flange of giving vent to anger of admitting air is convenient for with the utility model discloses install on the blast pipe of engine. The arrangement of the two air inlets can ensure that gas in the air guide pipe smoothly enters the inner cavity cover through the air inlet annular cavity and the air inlets to participate in combustion.
The structure of flow equalizing can make the low temperature gas who comes from the intake pipe and the high temperature gas who comes from the combustion chamber mix in limited space more evenly together, has reduced the space and has occupy, makes the utility model discloses a diesel oil burner for DPF carries the temperature can install on the limited motor vehicle in space, has improved the utility model discloses a practicality to air resistance is less, reduces the influence of combustor to motor vehicle exhaust back pressure as far as possible under the prerequisite of guaranteeing the misce bene. The flow equalizing structure guides the flowing direction of the airflow, prevents the airflow from blowing back the flame, and ensures the continuous combustion of the flame.
The vortex forms basically behind the air current through third vortex hole, spoiler and the diffusion baffle on the diffusion urceolus, and the air current passes through spoiler effect back temperature field distribution uniformity coefficient and can reach more than 0.96, makes the utility model provides an air current of BR-DPF device has very high temperature homogeneity, guarantees that regenerated temperature condition is even stable.
Drawings
FIG. 1 is a schematic diagram of a diesel combustor for DPF temperature increase according to the present invention;
FIG. 2 is a schematic structural view of the lumen cover;
FIG. 3 is a schematic structural view of a diffusion inner barrel;
FIG. 4 is a schematic structural view of the diffusion cylinder;
FIG. 5 is a schematic view of the spoiler construction;
fig. 6 is an enlarged view at a in fig. 4.
Detailed Description
The utility model discloses in to the gas flow direction is the downstream direction.
As shown in fig. 1 to 6, the utility model provides a diesel burner for raising temperature of DPF, comprising a casing 1, along the axial direction, one end of the casing 1 is an air outlet end and the other end is a hot air inlet end for hot air to enter; the side wall of the shell 1 adjacent to the hot gas inlet end is connected with an air inlet pipe 2, and the shell 1 is connected in series with an engine exhaust pipe through an air inlet flange 3 on the air inlet pipe 2 and an air outlet flange 4 at the air outlet end; the engine exhaust pipe is of a conventional structure of a motor vehicle and is not shown.
The hot gas inlet end of the shell 1 is connected with a combustion chamber through a flange structure 5; the combustion chamber comprises an outer cavity cover 6 and an inner cavity cover 7, the inner cavity cover 7 is positioned in the outer cavity cover 6, and the inner cavity cover 7, the outer cavity cover 6 and the shell 1 are coaxially arranged;
along the axial direction of the shell 1, one end of the inner cavity cover 7 is an oil inlet end and the other end is a hot air outlet; the oil inlet end is connected with an oil inlet 8, and the oil inlet 8 is connected with the outer cavity cover 6; the outer cavity cover 6 is fixedly connected with an oil nozzle 9, and the oil nozzle 9 extends into the oil inlet 8; an air inlet annular cavity 10 is arranged between the inner cavity cover 7 and the outer cavity cover 6, an air inlet 11 is formed in the side wall of the inner cavity cover 7, and the air inlet 11 is communicated with the air inlet annular cavity 10; a hot gas outlet of the inner cavity cover 7 extends radially to form a convex ring 12, and the convex ring 12 is connected with the inner wall of the outer cavity cover 6;
an outer cavity cover 6 at a hot gas outlet of the inner cavity cover 7 is communicated with a hot gas inlet end of the shell 1 through the flange structure 5, the side wall of the outer cavity cover 6 is connected with a gas guide pipe 13 and an ignition plug 14, the ignition plug 14 extends into the inner cavity cover 7, one end of the gas guide pipe 13 is communicated with the gas inlet annular cavity 10, and the other end of the gas guide pipe 13 is communicated with the gas inlet pipe 2.
In operation, the gas in the air inlet pipe 2 enters the air inlet annular cavity 10 through the air guide pipe 13, and does not directly blow on the flame, but enters the inner cavity cover 7 through the air inlet 11 to participate in combustion, so that the oxygen supply required by flame combustion can be ensured, the air flow is prevented from directly blowing the flame, and the flame cannot be blown out when the exhaust volume of the motor vehicle engine changes.
After being sprayed out from the oil nozzle 9 with high pressure, diesel oil is easy to atomize, oil mist is distributed in a conical shape, ignition is easier when the oil mist concentration is higher under the condition of sufficient oxygen content, but the oil mist wets the ignition plug 14 due to the fact that the distance between the ignition plug 14 and the oil nozzle 9 is too small, and the problems of carbon deposition, difficult ignition, service life reduction of the ignition plug 14 and the like are caused. The utility model discloses well oil mist is concentrated in inner chamber cover 7, and oil mist concentration obtains improving in the past, and ignition plug 14 need not too be close to fuel sprayer 9, has avoided the oil mist to drench the problem that ignition plug 14 brought, has improved oil mist concentration, and the success rate of igniteing obtains obviously promoting in the past relatively, and furthest has prolonged ignition plug 14's life-span, has good economic efficiency and excellent user experience.
The outer cavity cover 6 and the inner cavity cover 7 divide the combustion chamber into a low-temperature area (air inlet annular cavity 10) and a high-temperature area (inside the inner cavity cover 7), and no water cooling is needed, and no colloid or resin-shaped sticky matter is formed to block the oil nozzle 9, so that the structure and cost for arranging the water cooling are saved. The utility model discloses a diesel burner job stabilization for DPF raises temperature can be in the steady operation when any operating mode at motor vehicle engine, guarantees to provide the gas of sufficient regeneration with the temperature for BR-DPF device, avoids the regeneration failure to lead to BR-DPF to block up completely, need not off-line regeneration, reduces the maintenance cost, does not influence the normal use of motor vehicle because of off-line regeneration.
The air inlet pipe 2 is connected with an air inlet flange 3, and the air outlet end of the shell 1 is connected with an air outlet flange 4; the number of the air inlets 11 is two, and the two air inlets 11 are respectively positioned at the top and the bottom of the inner cavity cover 7.
The setting of air inlet flange 3 and air outlet flange 4 is convenient for with the utility model discloses install on the blast pipe of engine. The arrangement of the two air inlets 11 can ensure that the gas in the bleed air pipe 13 smoothly enters the cavity cover 7 through the air inlet annular cavity 10 and the air inlets 11 to participate in combustion.
A flow equalizing structure is arranged in the shell 1;
the flow equalizing structure comprises a diffusion inner cylinder 15, a diffusion outer cylinder 16 and a diffusion partition plate 17, wherein the diffusion inner cylinder 15, the diffusion outer cylinder 16 and the diffusion partition plate 17 are arranged coaxially with the shell 1; the diffusion inner cylinder 15 is positioned between the diffusion partition 17 and the hot gas inlet end of the shell 1, one end of the diffusion inner cylinder 15 is communicated with the hot gas outlet of the inner cavity cover 7, and the other end of the diffusion inner cylinder is connected with the diffusion partition 17; diffusion holes are uniformly distributed on the diffusion partition plate 17; the provision of through holes in the plate-like structure is conventional and diffusion holes are not shown.
The middle part of the diffusion inner cylinder 15 is radially protruded to form an expanding part, the diffusion inner cylinders 15 on two sides of the expanding part are respectively a first cylinder section 18 and a third cylinder section 20, and the expanding part is a second cylinder section 19; air holes 21 are respectively formed in the outer walls of the first cylinder section 18, the second cylinder section 19 and the third cylinder section 20 along the circumferential direction, and the air holes 21 are uniformly distributed on the outer wall of the third cylinder section 20; a plurality of first flow disturbing holes 22 are uniformly distributed on a step surface formed at the joint of the first cylinder section 18 and the second cylinder section 19;
the diffusion outer cylinder 16 is covered on the third cylinder section 20 and is connected with the diffusion partition plate 17; the end part of the diffusion outer cylinder 16 extends inwards and radially to form an annular connecting plate 23, and the annular connecting plate 23 is connected with the diffusion inner cylinder 15; a plurality of second flow disturbing holes 24 are circumferentially distributed on the annular connecting plate 23, and a plurality of third flow disturbing holes 25 are circumferentially distributed on the surface of the diffusion outer cylinder 16; a spoiler 26 is arranged at each of the first spoiler hole 22, the second spoiler hole 24 and the third spoiler hole 25; an upstream air cavity 27 is defined between the inner wall of the shell 1 and one side surface of the diffusion inner cylinder 15, the diffusion outer cylinder 16 and the diffusion partition 17, and a downstream air cavity 28 is defined between the other side surface of the diffusion partition and the shell 1. The intake pipe 2 communicates with the upstream air chamber 27.
The flow equalizing structure further comprises a spoiler 29 disposed in the downstream air chamber 28; the spoiler 29 comprises a spoiler cylinder 30, a through hole 31 is formed in the middle of the axial end face of the spoiler cylinder 30, and spoiler pieces 26 are uniformly distributed on the circumferential surface of the spoiler cylinder 30.
The structure of flow equalizing can make the low temperature gas who comes from the intake pipe and the high temperature gas who comes from the combustion chamber mix in limited space more evenly together, has reduced the space and has occupy, makes the utility model discloses a diesel oil burner for DPF carries the temperature can install on the limited motor vehicle in space, has improved the utility model discloses a practicality to air resistance is less, reduces the influence of combustor to motor vehicle exhaust back pressure as far as possible under the prerequisite of guaranteeing the misce bene. The flow equalizing structure guides the flowing direction of the airflow, prevents the airflow from blowing back the flame, and ensures the continuous combustion of the flame.
The vortex forms basically behind the air current through third vortex hole 25, spoiler 26 and the diffusion baffle 17 on the diffusion urceolus 16, and air current rethread spoiler 29 effect back temperature field distribution uniformity coefficient can reach more than 0.96, makes the utility model provides an air current of BR-DPF device has very high temperature homogeneity, guarantees that regenerated temperature condition is even stable.
An air inlet temperature sensor seat 32 and an air inlet pressure difference sensor seat 33 are arranged at the air inlet pipe 2; a combustion temperature sensor (conventional technology, not shown) is arranged at the inner cavity cover 7 of the combustion chamber, a mixed gas temperature sensor seat 34 is arranged at the downstream cavity at the upstream side of the spoiler 29, and an air outlet pressure difference sensor seat (conventional technology, not shown) is arranged at the downstream cavity at the downstream side of the spoiler 29.
The utility model also provides an extra method of raising the temperature that uses above-mentioned diesel oil burner for DPF to raise the temperature, will be used for DPF to raise the temperature the diesel oil burner through air inlet flange 3 and air outlet flange 4 install on DPF (such as BR-DPF) device upstream direction engine exhaust pipe; an inlet temperature sensor is arranged at an inlet temperature sensor seat 32, an inlet pressure difference sensor is arranged at an inlet pressure difference sensor seat 33, a mixed gas temperature sensor is arranged at a mixed gas temperature sensor seat 34, and an outlet pressure difference sensor is arranged at an outlet pressure difference sensor seat; a DPF differential pressure sensor is arranged at the DPF device;
the ignition plug 14, the oil nozzle 9, the air inlet temperature sensor, the combustion temperature sensor, the mixed gas temperature sensor, the air inlet differential pressure sensor and the air outlet differential pressure sensor are all connected with a vehicle-mounted ECU through a vehicle-mounted circuit, and the oil nozzle 9 is connected with an oil circuit of a motor vehicle. The vehicle-mounted ECU stores a target temperature and a target pressure difference;
when the DPF pressure difference sensor monitors that the pressure difference before and after the DPF device is larger than the target pressure difference, the trapped particles in the DPF are excessive, at the moment, the vehicle-mounted ECU controls the oil nozzle 9 to spray fuel oil into the combustion chamber inner cavity cover 7, and meanwhile, the vehicle-mounted ECU controls the ignition plug 14 to ignite; the air inlet pipe 2 supplies air to an air inlet annular cavity 10 of the combustion chamber through an air guide pipe 13, and the air enters an inner cavity cover 7 through an air inlet 11 to be mixed with fuel oil and combusted; high-temperature gas formed by combustion enters the shell 1 through the flange structure 5, and is mixed with low-temperature gas entering the shell 1 through the gas inlet pipe 2 through the flow equalizing structure to form mixed gas; when the temperature detected by the mixed gas temperature sensor is lower than the target temperature, the vehicle-mounted ECU controls the oil nozzle 9 to continuously inject oil and burn, and when the temperature detected by the mixed gas temperature sensor is higher than the target temperature, the vehicle-mounted ECU controls the oil nozzle 9 to stop injecting oil and stop burning; the mixed gas reaching the target temperature provides a temperature condition for regeneration of the DPF device while passing through the DPF device. The temperature raising method is matched with the utility model discloses a diesel combustor for DPF temperature raising provides stable regeneration temperature condition for BR-DPF device, avoids the problem that the BR-DPF device can't regenerate because of low exhaust temperature when diesel engine idles for a long time and when the operating mode is changed. Of course, the diesel burner for raising the temperature of the DPF of the present invention does not have to work by the above-mentioned temperature raising method, and the structure of the diesel burner for raising the temperature of the DPF itself determines that it inevitably has a plurality of advantages described in the content of the present invention.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (5)
1. A diesel burner for DPF heats, including the casing, its characterized in that: along the axial direction, one end of the shell is an air outlet end and the other end of the shell is a hot air inlet end for hot air to enter; the side wall of the shell adjacent to the hot gas inlet end is connected with an air inlet pipe, and the shell is connected to an engine exhaust pipe in series through the air inlet pipe and an air outlet end;
the hot gas inlet end of the shell is connected with a combustion chamber through a flange structure; the combustion chamber comprises an outer cavity cover and an inner cavity cover, the inner cavity cover is positioned in the outer cavity cover, and the inner cavity cover, the outer cavity cover and the shell are coaxially arranged;
along the axial direction of the shell, one end of the inner cavity cover is an oil inlet end and the other end of the inner cavity cover is a hot air outlet; the oil inlet end is connected with an oil inlet which is connected with the outer cavity cover; the outer cavity cover is fixedly connected with an oil nozzle, and the oil nozzle extends into the oil inlet; an air inlet annular cavity is arranged between the inner cavity cover and the outer cavity cover, an air inlet is formed in the side wall of the inner cavity cover, and the air inlet is communicated with the air inlet annular cavity; a hot gas outlet of the inner cavity cover extends radially to form a convex ring, and the convex ring is connected with the inner wall of the outer cavity cover;
the outer cavity cover at the hot gas outlet is communicated with the hot gas inlet end of the shell through the flange structure, the side wall of the outer cavity cover is connected with a gas-guiding pipe and an ignition plug, the ignition plug extends into the inner cavity cover, one end of the gas-guiding pipe is communicated with the gas-inlet annular cavity, and the other end of the gas-guiding pipe is communicated with the gas inlet pipe.
2. The diesel burner for DPF warming of claim 1, wherein: the air inlet pipe is connected with an air inlet flange, and the air outlet end of the shell is connected with an air outlet flange; the air inlet is provided with two, and two air inlets are located the top and the bottom of inner chamber cover respectively.
3. The diesel burner for DPF temperature raising of claim 2, wherein: a flow equalizing structure is arranged in the shell;
the flow equalizing structure comprises a diffusion inner cylinder, a diffusion outer cylinder and a diffusion partition plate, wherein the diffusion inner cylinder, the diffusion outer cylinder and the diffusion partition plate are coaxially arranged with the shell; the diffusion inner cylinder is positioned between the diffusion partition plate and the hot gas inlet end of the shell, one end of the diffusion inner cylinder is communicated with the hot gas outlet of the inner cavity cover, and the other end of the diffusion inner cylinder is connected with the diffusion partition plate; diffusion holes are uniformly distributed on the diffusion partition plate;
the middle part of the diffusion inner cylinder is radially protruded to form an expanding part, the diffusion inner cylinders on two sides of the expanding part are respectively a first cylinder section and a third cylinder section, and the expanding part is a second cylinder section; air holes are respectively formed in the outer walls of the first cylinder section, the second cylinder section and the third cylinder section along the circumferential direction, and the air holes are uniformly distributed on the outer wall of the third cylinder section; a plurality of first flow disturbing holes are distributed on a step surface formed at the joint of the first cylinder section and the second cylinder section;
the diffusion outer cylinder is covered on the third cylinder section and is connected with the diffusion partition plate; the end part of the diffusion outer cylinder extends inwards and radially to form an annular connecting plate which is connected with the diffusion inner cylinder; a plurality of second flow disturbing holes are circumferentially distributed on the annular connecting plate, and a plurality of third flow disturbing holes are circumferentially distributed on the surface of the diffusion outer cylinder; spoilers are arranged at the first spoiling hole, the second spoiling hole and the third spoiling hole; an upstream air cavity is formed by the inner wall of the shell, the inner diffusion cylinder, the outer diffusion cylinder and the surface of one side of the diffusion partition plate, and a downstream air cavity is formed by the surface of the other side of the diffusion partition plate and the shell.
4. The diesel burner for DPF temperature raising of claim 3, characterized by: the flow equalizing structure also comprises a spoiler arranged in the downstream air cavity;
the spoiler comprises a spoiler cylinder, wherein the middle part of the axial end face of the spoiler cylinder is provided with a through hole, and spoiler pieces are uniformly distributed on the circumferential surface of the spoiler cylinder.
5. The diesel burner for DPF warming according to any of the claims 1 to 4, characterized by: an air inlet temperature sensor seat and an air inlet pressure difference sensor seat are arranged at the air inlet pipe; a combustion temperature sensor is arranged at the position of the inner cavity cover of the combustion chamber, a mixed gas temperature sensor seat is arranged at the position of the downstream cavity at the upstream side of the turbulator, and an air outlet pressure difference sensor seat is arranged at the position of the downstream cavity at the downstream side of the turbulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110067619B (en) * | 2019-05-09 | 2024-04-12 | 平原滤清器有限公司 | Diesel burner for DPF temperature raising and temperature raising method |
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