CN210460808U

CN210460808U - Ultra-low emission device of environment-friendly automotive urea scr system

Info

Publication number: CN210460808U
Application number: CN201921046781.2U
Authority: CN
Inventors: 叶坛瑞
Original assignee: New Sanhe Petrochemical (fujian) Co Ltd
Current assignee: New Sanhe Petrochemical (fujian) Co Ltd
Priority date: 2019-07-06
Filing date: 2019-07-06
Publication date: 2020-05-05
Anticipated expiration: 2029-07-06

Abstract

The utility model discloses an ultra-low emission device of an environment-friendly vehicle urea SCR system, which comprises a first barrel, wherein the upper end of the first barrel is provided with a urea conveying pipe, the interiors of the first barrel and a second barrel are both fixedly provided with limiting rings, the inner walls of the first barrel and the second barrel are provided with a spring and a supporting plate, the supporting plate is connected with an SCR catalytic plate in a laminating way, and the bottom end of the second barrel is fixedly connected with an electrostatic generator; the utility model is provided with the electrostatic dust removal device on the SCR system, which can effectively collect the particles in the gas catalyzed by the SCR system; the top end of the urea conveying pipe is provided with an atomizing nozzle, so that urea can be in more effective contact with waste gas; the springs and the supporting plates are arranged at the two ends of the SCR catalytic plate, so that the SCR catalytic plate can be effectively supported, and the SCR catalytic plate can be prevented from being fixed in an SCR system in a stable and symmetrical mode.

Description

Ultra-low emission device of environment-friendly automotive urea scr system

Technical Field

The utility model relates to a waste gas treatment technical field specifically is an ultra-low discharging equipment of automobile-used urea scr system of environment-friendly.

Background

The Selective Catalytic Reduction (SCR) technology is a treatment process for NOx in tail gas emission of diesel vehicles, i.e. under the action of a catalyst, a reducing agent ammonia or urea is injected to reduce NOx in tail gas into N2 and H2O. The catalyst includes noble metal and non-noble metal. The technology is also widely applied to the aftertreatment of the tail gas of the diesel engine, the generation of particle PM is controlled as much as possible in the engine by optimizing the oil injection and combustion processes, then the nitrogen oxide formed under the oxygen-rich condition is treated outside the engine, and the selective catalytic reduction is carried out on the nitrogen oxide (NOx) by using vehicle urea (the vehicle urea is decomposed to generate ammonia at a certain temperature) in time, so that the aims of saving energy and reducing emission are fulfilled, the current common defects in the SCR system include poor injection effect of the urea, the urea cannot be in full contact with the waste gas, the catalytic reduction of the waste gas is not thorough, the waste of resources is caused, and the waste gas of the SCR system still contains a large amount of particles after being reduced, the particles are directly discharged into the air to cause air pollution, and the SCR catalytic plate in the prior art is unstable in fixation and often has poor catalytic reduction effect due to the displacement of the SCR catalytic plate, thus, there is a great need for an SCR system that can perform catalytic reduction efficiently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an environment-friendly automobile-used urea SCR system ultralow discharging equipment has effectively to add the catalyst, stable SCR catalysis board and collect advantages such as granule for solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an environment-friendly ultra-low emission device of a vehicle urea SCR system comprises a first barrel body, wherein a connecting pipe is fixedly welded at the upper end of the first barrel body and is fixedly connected with a urea conveying pipe through a first flange, an atomizing nozzle is arranged at the top end of the urea conveying pipe and is positioned in the first barrel body, the first barrel body is fixedly connected with a second barrel body through a third flange, limiting rings are fixedly arranged in the first barrel body and the second barrel body, springs are arranged on the inner sides of the limiting rings and are fixedly connected to the inner walls of the first barrel body and the second barrel body, a supporting plate is fixedly connected to the top end of each spring, an SCR catalytic plate is connected to the supporting plate in a laminating manner, an installation sleeve is fixedly welded at the bottom end of the second barrel body, an electrostatic generator is fixedly connected to the installation sleeve through bolts, and a dust collection box is embedded at the bottom end of the second barrel body, the top of second barrel is inlayed and is had static and take place the board, the fixed welding of one end of second barrel has the sensor mount pad, fixed mounting has temperature sensor and oxynitrides sensor on the sensor mount pad.

Preferably, one end of the first cylinder and one end of the second cylinder are both fixedly provided with a second flange.

Preferably, the first flange, the second flange and the third flange are fixedly connected through bolts.

Preferably, the inclination angle of the atomizer is thirty-five to forty-five degrees, and the atomizer is obliquely opposite to the SCR catalytic plate.

Preferably, the through holes of the SCR catalyst plate are arranged in a honeycomb pattern, and the SCR catalyst plate is located at the third flange connection.

Preferably, the supporting plates are arranged on four sides of the first cylinder and the second cylinder, and at least one group of springs is arranged below each group of supporting plates.

Compared with the prior art, the beneficial effects of the utility model are that:

the electrostatic dust removal device is arranged on the SCR system, so that particles in gas catalyzed by the SCR system can be effectively collected, and the particles are prevented from being discharged into the air to cause air pollution and even harm to human body safety; the top end of the urea conveying pipe is provided with the atomizing nozzle, so that urea can be in more effective contact with waste gas, and the urea can be prevented from being liquefied and collected in front of the SCR catalytic plate, so that the catalytic effect of the waste gas is poor; the springs and the supporting plates are arranged at the two ends of the SCR catalytic plate, so that the SCR catalytic plate can be effectively supported, and the SCR catalytic plate can be prevented from being fixed in an SCR system in a stable and symmetrical mode.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a schematic view a of the present invention.

In the figure: 1. a first cylinder; 2. a second cylinder; 3. a connecting pipe; 4. a first flange; 5. a urea delivery pipe; 6. a second flange; 7. a third flange; 8. a bolt; 9. installing a sleeve; 10. an electrostatic generator; 11. a dust collection box; 12. a static electricity generating plate; 13. a temperature sensor; 15. a nitrogen oxide sensor; 16. a sensor mount; 17. an atomizing spray head; 18. a limiting ring; 19. an SCR catalyst plate; 20. a support plate; 21. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The same reference numbers in different drawings identify the same or similar elements; it should be further understood that terms such as "first," "second," "third," "upper," "lower," "front," "rear," "inner," "outer," "end," "portion," "section," "width," "thickness," "zone," and the like, may be used solely for convenience in reference to the figures and to aid in describing the invention, and are not intended to limit the invention.

Referring to fig. 1-3, the present invention provides a technical solution: an ultra-low emission device of an environment-friendly vehicle urea SCR system comprises a first cylinder body 1, wherein the upper end of the first cylinder body 1 is fixedly welded with a connecting pipe 3, the connecting pipe 3 is fixedly connected with a urea conveying pipe 5 through a first flange 4, the top end of the urea conveying pipe 5 is provided with an atomizing nozzle 17, the atomizing nozzle 17 is positioned in the first cylinder body 1, and the position can be set to convey urea into an SCR system to be combined with exhaust gas on an SCR catalytic plate 19 to realize catalytic reduction; the first barrel 1 is fixedly connected with the second barrel 2 through a third flange 7, limiting rings 18 are fixedly arranged inside the first barrel 1 and the second barrel 2, springs 21 are arranged on the inner sides of the limiting rings 18 and fixedly connected to the inner walls of the first barrel 1 and the second barrel 2, a supporting plate 20 is fixedly connected to the top ends of the springs 21, an SCR catalytic plate 19 is attached to the supporting plate 20, and the first barrel 1 and the second barrel 2 at the positions are connected through the third flange 7, so that the first barrel 1 and the second barrel 2 are convenient to disassemble, and internal equipment can be maintained and replaced; the bottom end of the second cylinder body 2 is fixedly welded with a mounting sleeve 9, an electrostatic generator 10 is fixedly connected in the mounting sleeve 9 through a bolt 8, a dust collecting box 11 is inlaid in the bottom end of the second cylinder body 2, an electrostatic generating plate 12 is inlaid in the top of the second cylinder body 2, and the electrostatic generator 10 at the position can be set to collect particles in the treated waste gas; one end of the second cylinder 2 is fixedly welded with a sensor mounting seat 16, a temperature sensor 13 and an oxynitride sensor 15 are fixedly mounted on the sensor mounting seat 16, and the temperature sensor 13 and the oxynitride sensor 15 at the position can detect whether the exhaust gas reaches the emission standard.

Specifically, the one end of first barrel 1 and second barrel 2 is all fixed and is equipped with second flange 6, and the settlement of this department can conveniently be to the dismantlement of first barrel 1 and second barrel 2 for be convenient for maintain and change inside equipment.

Specifically, first flange 4, second flange 6 and third flange 7 all carry out fixed connection through bolt 8, and the flange of this department all adopts bolt 8 to carry out fixed connection for can be stable fixed prevent leaking gas, and convenient the dismantlement.

Specifically, the inclination angle of the atomizer 17 is thirty degrees to forty-five degrees, and the atomizer 17 is inclined to the SCR catalytic plate 19, and the setting of the atomizer 17 at this position can make urea contact with the large surface of the exhaust gas, and can contact the SCR catalytic plate 19 with the exhaust gas quickly, so that the exhaust gas is catalytically reduced.

Specifically, the through holes on the SCR catalyst plate 19 are arranged in a honeycomb pattern, and the SCR catalyst plate 19 is located at the joint of the third flange 7, the SCR catalyst plate 19 at this position is set so that the exhaust gas can be in contact with the SCR catalyst plate 19 in a large area to react, and the position of the SCR catalyst plate 19 is set so as to be convenient to detach and replace.

Specifically, the supporting plates 20 are arranged on four sides of the first cylinder 1 and the second cylinder 2, and at least one group of springs 21 is arranged under each group of supporting plates 20, and the supporting plates 20 and the springs 21 are arranged at the positions to support the SCR catalytic plates 19, so that the SCR catalytic plates 19 can not be balanced.

The working principle is as follows: when the SCR system is used, the SCR system is connected with an exhaust system of a vehicle, then the connecting pipe 3 is connected with a urea storage box through the urea conveying pipe 5, when the SCR system is started, urea is atomized and sprayed in the first cylinder 1 through the urea conveying pipe 5 and the atomizing spray head 17, the atomized urea is contacted with exhaust gas in the first cylinder 1, then catalytic reduction is realized on the SCR catalytic plate 19, oxynitride in the exhaust gas is reduced into nitrogen and water and then discharged, the supporting plate 20 and the spring 21 are arranged below the SCR catalytic plate 19 to keep the balance of the SCR catalytic plate 19, the SCR catalytic plate 19 is prevented from inclining when the SCR catalytic plate 19 is used, so that the exhaust gas is discharged without being treated, the static electricity generation plate 12 and the dust collection box 11 are embedded on the second cylinder 2, particles in the exhaust gas can be collected and prevented from being discharged into the air, this allows the treatment of the exhaust gas to be completed even with the entire SCR system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an ultra-low discharging equipment of automobile-used urea scr system of environment-friendly, includes first barrel (1), its characterized in that: the upper end fixed welding of first barrel (1) has connecting pipe (3), connecting pipe (3) is through first flange (4) and urea conveyer pipe (5) fixed connection, the top of urea conveyer pipe (5) is equipped with atomizer (17), atomizer (17) are in the inside of first barrel (1), first barrel (1) is through third flange (7) and second barrel (2) fixed connection, the inside of first barrel (1) and second barrel (2) all is fixed and is equipped with spacing ring (18), the inboard of spacing ring (18) is equipped with spring (21) fixed connection on first barrel (1) and second barrel (2) inner wall, spring (21) top fixed connection has backup pad (20), the laminating is connected with SCR catalysis board (19) on backup pad (20), the bottom fixed welding of second barrel (2) has installation sleeve (9), through bolt (8) fixedly connected with static generator (10) in installation sleeve (9), the bottom of second barrel (2) is inlayed and is had dust collection box (11), the top of second barrel (2) is inlayed and is had static board (12) that takes place, the fixed welding of one end of second barrel (2) has sensor mount pad (16), fixed mounting has temperature sensor (13) and oxynitrides sensor (15) on sensor mount pad (16).

2. The ultra-low emission device of the environment-friendly vehicular urea scr system according to claim 1, wherein: and a second flange (6) is fixedly arranged at one end of each of the first cylinder (1) and the second cylinder (2).

3. The ultra-low emission device of the environment-friendly vehicular urea scr system according to claim 1, wherein: the first flange (4), the second flange (6) and the third flange (7) are fixedly connected through bolts (8).

4. The ultra-low emission device of the environment-friendly vehicular urea scr system according to claim 1, wherein: the inclination angle of the atomizing spray head (17) is thirty-five degrees to forty-five degrees, and the atomizing spray head (17) is obliquely opposite to the SCR catalytic plate (19).

5. The ultra-low emission device of the environment-friendly vehicular urea scr system according to claim 1, wherein: the through holes on the SCR catalyst plates (19) are arranged in a honeycomb mode, and the SCR catalyst plates (19) are arranged at the joint of the third flanges (7).

6. The ultra-low emission device of the environment-friendly vehicular urea scr system according to claim 1, wherein: the supporting plates (20) are arranged on four sides of the first cylinder (1) and the second cylinder (2), and at least one group of springs (21) is arranged below each group of supporting plates (20).