CN217841792U

CN217841792U - Urea solution mixing device of SCR system

Info

Publication number: CN217841792U
Application number: CN202222198978.6U
Authority: CN
Inventors: 孙志国; 李明; 郑蒙蒙
Original assignee: Henan Diesel Engine Industry Co Ltd
Current assignee: Henan Diesel Engine Industry Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-18
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a SCR system urea solution mixing arrangement, comprising a steel pipe, the steel pipe is connected with the blast pipe, the internal diameter of steel pipe is the same with the internal diameter of blast pipe, be provided with the connector in the steel pipe, the central point of connector puts and is provided with the through-hole, the lateral surface equipartition of connector has the blade, the blade is connected with the inside wall of steel pipe, the welding that is the angle on the blade has the flow distribution plate, the quantity of connector is two, and two connectors are followed the inside length direction evenly distributed of steel pipe, and this SCR system urea solution mixing arrangement can improve the mixed condition of urea solution and diesel engine tail gas with the urea aqueous solution and the diesel engine tail gas misce who spout in the blast pipe, reduces NH3 leakage quantity when improving NOx conversion efficiency, reaches the emission requirement of diesel engine tail gas.

Description

Urea solution mixing device of SCR system

Technical Field

The utility model relates to a diesel engine tail gas treatment technical field specifically is a SCR system urea solution mixing arrangement.

Background

As emissions regulations become more stringent for diesel NOx emissions, it is increasingly important how to reduce the NOx content of diesel exhaust.

SCR tail gas aftertreatment system is the best choice of solving NOx emission at present, and the SCR system comprises injection mixing system, control system, catalyst converter device etc. urea aqueous solution and ammonia are the direct mixing in current SCR pipeline, and urea injection system leads to NOx conversion inefficiency when reducing it because urea aqueous solution and diesel engine tail gas distribute inhomogeneous, and NH3 lets out the leakage quantity greatly, discharges not up to standard, the polluted environment.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome current defect, provide a SCR system urea solution mixing arrangement, can improve the mixed situation of urea solution and diesel engine tail gas with the urea aqueous solution and the diesel engine tail gas misce bene who spout in the blast pipe, reduce NH3 when improving NOx conversion efficiency and let out leakage, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a SCR system urea solution mixing arrangement, includes the steel pipe, the steel pipe is connected with the blast pipe, the internal diameter of steel pipe is the same with the internal diameter of blast pipe, be provided with the connector in the steel pipe, the central point of connector puts and is provided with the through-hole, the lateral surface equipartition of connector has the blade, the blade is connected with the inside wall of steel pipe, the welding that is the angle on the blade has the flow distribution plate.

As a preferred technical scheme of the utility model, the quantity of connector is two, and two connectors are along the inside length direction evenly distributed of steel pipe.

As an optimal technical scheme of the utility model, the both ends of steel pipe all are provided with the flange, be provided with companion flange on the blast pipe, through the bolt fixed connection who passes flange and companion flange between steel pipe and the blast pipe.

As an optimized technical scheme of the utility model, the connector is the conical surface cylinder.

Compared with the prior art, the beneficial effects of the utility model are that: this SCR system urea solution mixing arrangement compact structure, the design is ingenious, the cost of manufacture is low, one end through at the blast pipe sets up the steel pipe, the equipartition has a plurality of blades and flow distribution plate in the steel pipe, form a plurality of mixing passage, shunt it when letting in urea aqueous solution and automobile exhaust, make urea aqueous solution and tail gas carry out the intensive mixing in mixing passage, reduce NH3 leakage quantity when improving NOx conversion efficiency, reach the emission requirement of diesel engine tail gas.

Drawings

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

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic view of the structure of the linker;

FIG. 4 is a schematic view of a blade configuration;

fig. 5 is a schematic structural view of the flow distribution plate.

In the figure: 1 flange, 2 steel pipes, 3 connectors, 4 blades, 5 splitter plates and 6 through holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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 efforts all belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a SCR system urea solution mixing arrangement, including steel pipe 2, steel pipe 2 is connected with the blast pipe, the both ends of steel pipe 2 all are provided with flange 1, be provided with companion flange on the blast pipe, through the bolt fixed connection who passes flange 1 and companion flange between steel pipe 2 and the blast pipe, connect through flange 1 between steel pipe 2 and the blast pipe, make things convenient for the dismantlement and the installation of this device, the internal diameter of steel pipe 2 is the same with the internal diameter of blast pipe, be provided with connector 3 in the steel pipe 2, the central point of connector 3 puts and is provided with through-hole 6, the lateral surface equipartition of connector 3 has blade 4, blade 4 is connected with the inside wall of steel pipe 2, the welding that is the angle on blade 4 has flow distribution plate 5, connector 3 is the conical surface cylinder, be convenient for the even welding of blade 4, the quantity of connector 3 is two, two connectors 3 are along 2 inside length direction evenly distributed of steel pipe, the blade 4 and the crisscross distribution of flow distribution plate 5 constitution on two connectors, make urea solution and tail gas mixture of urea solution and tail gas more thorough, the quantity and the arrangement mode of mixture piece can change according to different demands, finally select optimal design, urea solution and the exhaust gas mixing arrangement in the blast pipe of this system urea solution in the blast pipe, the diesel engine exhaust pipe is evenly, improve the urea solution and the diesel engine exhaust gas mixing arrangement condition of diesel engine improves the improvement, the improvement of the NH3 and improves the conversion efficiency reduction of the diesel engine.

The size of this mixing arrangement resistance will influence the performance of diesel engine, the model is established to carry out the emulation calculation to urea aqueous solution and diesel engine exhaust mixing uniformity, obtain the mixing effect and the resistance of blender, when exhaust velocity was 40m/s, the pressure drop of air current behind this device < 100Pa, mixing uniformity is 0.964, satisfies the mixing uniformity requirement, has reached the mixing effect of SCR system mixing device.

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 a SCR system urea solution mixing arrangement which characterized in that: including steel pipe (2), steel pipe (2) are connected with the blast pipe, the internal diameter of steel pipe (2) is the same with the internal diameter of blast pipe, be provided with connector (3) in steel pipe (2), the central point of connector (3) puts and is provided with through-hole (6), the lateral surface equipartition of connector (3) has blade (4), blade (4) are connected with the inside wall of steel pipe (2), the welding that is the angle on blade (4) has flow distribution plate (5).

2. The urea solution mixing device of an SCR system according to claim 1, wherein: the number of the connectors (3) is two, and the two connectors (3) are uniformly distributed along the length direction in the steel pipe (2).

3. The urea solution mixing device of an SCR system according to claim 1, wherein: flanges (1) are arranged at two ends of the steel pipe (2), mating flanges are arranged on the exhaust pipe, and the steel pipe (2) is fixedly connected with the exhaust pipe through bolts penetrating through the flanges (1) and the mating flanges.

4. The urea solution mixing device of the SCR system of claim 1, wherein: the connector (3) is a conical cylinder.