CN211230585U

CN211230585U - Burner capable of achieving efficient regeneration of DPF of particulate filter under low-temperature working condition

Info

Publication number: CN211230585U
Application number: CN201921164619.0U
Authority: CN
Inventors: 臧志成; 朱磊; 曾伟; 刘德文
Original assignee: Kailong High Technology Co Ltd
Current assignee: Kailong High Technology Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-08-11
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a satisfy high-efficient palingenetic combustor of particulate filter DPF low temperature operating mode, it include the shell body with set up in combustion chamber in the shell body, the outer combustion cover of water conservancy diversion blender, interior combustion cover and one-level admits air, the water conservancy diversion blender that admits air connect in between combustion chamber and the outer combustion cover of one-level, interior combustion cover is established in the outer combustion cover of one-level, install the nozzle on the combustion chamber, the nozzle is connected and is spouted the oil pipe, just two sets at least ignition are installed to the combustion intracavity, the trailing end connection of the outer combustion cover of one-level has the outer combustion cover of second grade, interior combustion cover, the outer combustion cover of one-level and the outer combustion cover of second grade are sheathe in and have all seted. The burner has compact structure, convenient assembly and disassembly and convenient maintenance; and ignition failure can be avoided, the whole combustion process has better heat effect, and the combustion is sufficient.

Description

Burner capable of achieving efficient regeneration of DPF of particulate filter under low-temperature working condition

Technical Field

The utility model relates to a combustor especially relates to a satisfy high-efficient palingenetic combustor of particulate trap DPF low temperature operating mode for diesel engine selectivity catalytic conversion system.

Background

At present, the rapid development of motor vehicles is accompanied by serious atmospheric pollution, and the motor vehicles have the characteristics of regional composite type. Air pollution in many large cities has been shifted from soot type pollution to soot and motor vehicle composite type pollution, and a few extra large cities have obviously shown photochemical smog type (i.e. motor vehicle exhaust type) air pollution. Therefore, the research on the diesel vehicle exhaust pollution control technology is extremely important and urgent.

Particulate matters in the tail gas emission pollution of the diesel vehicle are also main pollutants, and the particulate matters in the exhaust gas are mainly reduced by a trapping means through a particulate matter treatment technology. The most effective technology currently recognized in reducing particulate emissions from diesel engines is particulate filtration. The diesel engine tail gas particulate matter trap (DPF) system can eliminate 95% of particulate matter (black smoke) emission of the diesel engine and reduce PM content in air.

Since the particulate trap continuously collects particulates in the exhaust gas of the internal combustion engine, which tends to cause an increase in exhaust back pressure, it is necessary to periodically clean the DPF of particulates. There are two functions of particulate removal in DPF operation, passive regeneration and active regeneration. The active regeneration is used for removing particles by adding a combustor in front of the DPF, wherein the combustor comprises an air supply system, a fuel supply system, a nozzle, an oil-gas mixer and an ignition plug. The atomized oil-gas mixture is ignited in the combustion chamber through the ignition plug, so that the exhaust temperature reaches about 620 ℃, the particulate matters in the DPF are ignited, and the purpose of active regeneration is realized.

At present, the existing combustor for removing particles through DPF active regeneration generally has the defects of insufficient combustion and poor heat effect, so that the phenomenon of black smoke or oil leakage can occur in the DPF active regeneration process, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a satisfy the combustor of particulate filter DPF low temperature operating mode high efficiency regeneration to there is insufficient and the poor problem of fuel factor in the combustor that is used for DPF initiative regeneration to clear away the granule among the solution prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a satisfy high-efficient palingenetic combustor of particulate filter DPF low temperature operating mode, its include the shell body with set up in combustion chamber in the shell body, the water conservancy diversion blender that admits air, interior combustion liner and the outer combustion liner of one-level, wherein, the water conservancy diversion blender that admits air connect in between combustion chamber and the outer combustion liner of one-level, interior combustion liner sets up in the outer combustion liner of one-level, install the nozzle on the combustion chamber, the nozzle is connected and is spouted the oil pipe, just two sets at least ignition, the trailing end connection of the outer combustion liner of one-level has the outer combustion liner of second grade, interior combustion liner, the outer combustion liner of one-level and the outer combustion liner of second grade are sheathe in and are.

Particularly, two sets of ignition devices are installed in the combustion chamber, and the two sets of ignition devices are arranged at the upper part and the bottom of the combustion chamber in a staggered mode.

Particularly, the secondary outer combustion sleeve is integrally in a conical structure, and one end with a small radius is connected with the primary outer combustion sleeve.

Particularly, the whole air inlet flow guide mixer is of a conical structure, one end with a small radius is connected with the combustion cavity, and the other end with a large radius is connected with the first-stage outer combustion sleeve.

Particularly, both ends of the outer shell are provided with connecting flanges, and the outer shell is fixedly connected to an exhaust pipe of the diesel engine through the connecting flanges.

Particularly, temperature sensor fixing bases are installed at two ends of the outer shell, temperature sensors are installed in the temperature sensor fixing bases and are in communication connection with the oil-gas mixture supply device, and the injection amount of the oil-gas mixture supply device is controlled according to the detected temperature.

Particularly, the oil spraying pipe is connected with the nozzle through a connecting joint, an oil pipe fixing seat is arranged outside the outer shell, and the oil spraying pipe is installed on the oil pipe fixing seat.

Particularly, ignition includes ignition electrode, ignition electrode seat and ignition sleeve, the ignition electrode seat is fixed in on the shell body, the ignition electrode install in on the ignition electrode seat and stretch into the setting of combustion chamber, the ignition sleeve cover is located outside the ignition electrode.

In particular, the inner combustion casing is partially located within the induction flow mixer, with the remainder located within the primary outer combustion casing.

The beneficial effects of the utility model are that, compare with prior art the combustor that satisfies particulate trap DPF low temperature operating mode high efficiency regeneration has following advantage:

1) at least two sets of ignition devices are arranged in the combustion cavity, so that ignition failure can be avoided, higher heat is provided for primary combustion of an oil-gas mixture in the combustion cavity, sufficient combustion is facilitated, and high-temperature heat energy is generated;

2) the rear section of the combustion cavity is provided with a two-stage outer combustion sleeve to form a primary combustion chamber and a secondary combustion chamber, and high-temperature hot air after oil injection and combustion can be uniformly mixed with tail gas, so that the whole combustion process has better heat effect and full combustion;

3) the whole structure is simple, the volume is small, the disassembly and the assembly are convenient, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a combustor satisfying low-temperature working condition and efficient regeneration of a DPF of a particulate filter according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a burner meeting the requirement of efficient regeneration of a DPF of a particulate trap under low temperature conditions according to an embodiment of the present invention.

In this embodiment, a satisfy high-efficient palingenetic combustor of particulate trap DPF low temperature operating mode includes shell body 1 and sets up combustion chamber 2 in shell body 1, the water conservancy diversion blender 3 that admits air, interior burning cover 4, the outer burning cover of one-level 5 and the outer burning cover of second grade 6, and the equal welded fastening in both ends of shell body 1 has flange 7, through flange 7 with shell body 1 fixed connection on the blast pipe of diesel engine, easy dismounting, the later maintenance of being convenient for.

2 transverse arrangement in combustion chamber, the whole toper structure that is of diversion mixer 3 admits air, the little one end of its radius and 2 welded fastening in combustion chamber, the big one end of radius and the 5 welded fastening of one-level outer combustion cover, it is located the diversion mixer 3 that admits air to fire the cover 4 part in to fire the cover 5 in all the other parts are located the one-level, one-level outer combustion cover 5 transversely is fixed in shell body 1 through the fixed bolster, the whole toper structure that is of second grade outer combustion cover 6, the little one end of its radius is connected with the end of giving vent to anger of one-level outer combustion cover 5, interior combustion cover 4, a plurality of air vent 8 has all been seted up on one-level outer combustion cover 5 and the second grade outer combustion cover 6, form primary combustion chamber in the combustion chamber 2, form the one-level combustion chamber in the one.

Install two sets of ignition in combustion chamber 2, two sets of ignition crisscross settings in combustion chamber 2's upper portion and bottom, ignition includes ignition electrode 9, ignition electrode holder 10 and ignition sleeve 11, ignition electrode holder 10 is fixed in on the shell body 1, ignition electrode 9 is installed on ignition electrode holder 10 and is stretched into combustion chamber 2 and set up, ignition sleeve 11 covers is located outside ignition electrode 9, two sets of ignition can avoid the emergence of single set ignition failure, provide higher heat energy for oil-gas mixture's burning simultaneously, be favorable to producing higher high temperature hot gas flow ability in combustion chamber 2.

Install nozzle 12 on combustion chamber 2, nozzle 12 is connected with oil spout pipe 14 through attach fitting 13, is provided with oil pipe fixing base 15 outside shell body 1, and oil spout pipe 14 is installed on oil pipe fixing base 15, and temperature sensor fixing base 16 is all installed at the both ends of shell body 1, installs temperature sensor in the temperature sensor fixing base 16, and temperature sensor and oil-gas mixture feeding device communication connection control oil-gas mixture feeding device's injection volume according to the temperature that detects.

When the diesel engine is in work, the post-processing electronic control unit carries out preheating of the ignition preheating plug according to parameters collected by the exhaust temperature sensor and the differential pressure sensor, when the front differential pressure and the rear differential pressure of the DPF reach a calibrated value to be regenerated, the electronic control unit carries out fuel supply of the electromagnetic fuel pump when the preheating time reaches a certain time, gas and liquid are conveyed to the nozzle 12 through the connecting pipe to be atomized and sprayed into the combustion cavity 2, oil mist contacts the ignition plug to ignite and burn, the fuel is fully heated on the preheating plug to form flames, in order to further form the flames through the flames, the air pump is started to work, the oil-gas mixer is further propagated to form the flames to further diffuse and burn, and the exhaust temperature is rapidly increased. The tail gas discharged by the engine is uniformly mixed and combusted with the tail gas in the inner combustion sleeve 4, the primary outer combustion sleeve 5 and the secondary outer combustion sleeve 6 through the air inlet diversion mixer 3, the controller controls the oil injection quantity to control the high-temperature air flow to be 550 +/-20 ℃, so that the high-temperature air flow is uniformly sprayed to the particle catcher to burn off deposited particles to generate reliable active regeneration.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a satisfy high-efficient palingenetic combustor of particulate filter DPF low temperature operating mode, its include the shell body with set up in combustion chamber in the shell body, the water conservancy diversion blender that admits air, interior combustion liner and the outer combustion liner of one-level, its characterized in that, admit air the water conservancy diversion blender connect in between combustion chamber and the outer combustion liner of one-level, interior combustion liner is established and is arranged in the outer combustion liner of one-level, install the nozzle on the combustion chamber, the oil spout pipe is connected to the nozzle, just two sets at least ignition, the trailing end connection of the outer combustion liner of one-level has the outer combustion liner of second grade, interior combustion liner, the outer combustion liner of one-level and the outer combustion liner of second grade are sheathe in and have.

2. The burner for satisfying the low-temperature condition and high-efficiency regeneration of the DPF of the particulate trap as defined in claim 1, wherein two sets of ignition devices are installed in the combustion chamber, and the two sets of ignition devices are alternately arranged at the upper part and the bottom part of the combustion chamber.

3. The burner for performing efficient regeneration of a particulate trap DPF under low temperature conditions as recited in claim 1, wherein said secondary outer combustion sleeve is a conical structure as a whole, and the end with a small radius is connected to said primary outer combustion sleeve.

4. The burner of claim 1, wherein the intake-flow-guide mixer is a conical structure, the end with a small radius is connected to the combustion chamber, and the end with a large radius is connected to the first-stage external combustion sleeve.

5. The burner for realizing the low-temperature working condition and the high-efficiency regeneration of the DPF of the particulate trap as claimed in claim 1, wherein both ends of the outer shell are provided with connecting flanges, and the outer shell is fixedly connected to an exhaust pipe of a diesel engine through the connecting flanges.

6. The burner meeting the requirement of efficient regeneration of the particulate trap DPF under low temperature conditions as claimed in claim 1, wherein both ends of the outer shell are mounted with temperature sensor fixing seats, and a temperature sensor is mounted in each temperature sensor fixing seat.

7. The burner meeting the requirement of efficient regeneration of the DPF of the particulate trap under the low-temperature working condition as recited in claim 1, wherein the oil injection pipe is connected with the nozzle through a connecting joint, an oil pipe fixing seat is arranged outside the outer shell, and the oil injection pipe is mounted on the oil pipe fixing seat.

8. The burner meeting the requirement of efficient regeneration of the particulate trap DPF under low-temperature conditions as set forth in claim 1, wherein the ignition device comprises an ignition electrode, an ignition electrode holder and an ignition sleeve, the ignition electrode holder is fixed on the outer shell, the ignition electrode is mounted on the ignition electrode holder and extends into the combustion chamber, and the ignition sleeve is sleeved outside the ignition electrode.

9. The burner of claim 1 for efficient regeneration of a particulate trap DPF at low temperatures, wherein the inner combustion liner is partially disposed within the induction mixer and the remainder is disposed within the primary outer combustion liner.