CN210509341U

CN210509341U - Guohu post-processor

Info

Publication number: CN210509341U
Application number: CN201921206090.4U
Authority: CN
Inventors: 董昕; 高超; 方今朝; 刘潇
Original assignee: Wanxiang Tongda Co ltd
Current assignee: Wanxiang Tongda Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-05-12
Anticipated expiration: 2029-07-30

Abstract

The utility model relates to a six post-processor in China, which comprises a DOC oxidation catalyst, a PDF particle catcher, a urea mixing box and an SCR catalysis box assembly which are sequentially arranged; the urea mixing box comprises a mixing box shell, a nozzle seat matched and installed on the outer wall of the mixing box shell, and an air guide pipe and a mixer matched and installed inside a urea mixing cavity of the mixing box shell; the pipe orifice of the upper end pipe body of the gas guide pipe is matched and aligned with the bottom jet orifice of the nozzle seat; one or more layers of steel wire meshes are axially arranged in the upper end pipe body of the air guide pipe at intervals in a matching mode. The utility model discloses an add the wire net more than one deck and the one deck in the air duct of the bottom jet below of nozzle holder, can effectively promote the vaporization effect and the homogeneity of urea mixing chamber.

Description

Guohu post-processor

Technical Field

The utility model relates to a vehicle aftertreatment ware technical field, concretely relates to six aftertreatment in state ware.

Background

And the Ministry of industry and communications 9 months in 2017 starts a related research on a fuel vehicle quit mechanism, and starts to set up a schedule for stopping producing and selling traditional energy vehicles. In the national standard 17691-2005 implemented in 1/2007, in 10/2017, in 6 provinces such as Beijing, Tianjin, Hebei, Shandong, Shanxi, Henan and the like, the automobile gasoline and diesel oil lower than the national standard is forbidden to be sold in each city, and in 1/2020, in all new vehicles which do not meet the emission standard of 'national standard' the research subject of the emission post-treatment of the commercial vehicles cannot be produced, sold and registered, so the research subject has wide social value and economic benefit.

The integrated exhaust aftertreatment system device suitable for the diesel vehicle is researched and developed, and the exhaust aftertreatment system device which is best matched with the vehicle type and the engine is designed according to the engine, the temperature characteristic, the noise spectrum characteristic, the air flow pressure characteristic, the pollutant emission characteristic, the noise reduction target and the emission target by utilizing CAE software, so that the whole system has the reliability with the same service life as the whole vehicle, and the integrated exhaust aftertreatment system device is a specific research and development direction.

The existing six-country postprocessor has certain defects in structural design, so that the vaporization effect and uniformity in a urea mixing cavity are not good enough, and the problems of urea crystallization and the like generated in the mixing cavity in large quantity are easily caused. Therefore, how to optimize the uniformity of the flow field and enhance the vaporization effect to prevent urea crystallization is a technical problem which is urgently needed to be solved at present.

Disclosure of Invention

The utility model discloses to the problem that exists among the above-mentioned prior art, a six postprocessors in state that can effectively promote the vaporization effect and the homogeneity of urea mixing chamber is proposed.

The utility model discloses a realize through following technical scheme:

the DOVI post-processor comprises a DOC oxidation catalyst, a PDF particle catcher arranged at the rear end of the DOC oxidation catalyst, a urea mixing box arranged at the rear end of the PDF particle catcher and an SCR catalytic box assembly arranged at the rear end of the urea mixing box; the urea mixing box comprises a mixing box shell, a nozzle seat matched and installed on the outer wall of the mixing box shell, and an air guide pipe and a mixer matched and installed inside a urea mixing cavity of the mixing box shell; the pipe orifice of the upper end pipe body of the gas guide pipe is matched and aligned with the bottom jet orifice of the nozzle seat; and a steel wire mesh is axially and matchedly arranged inside the upper end pipe body of the air duct.

The national six post-processor, wherein: the steel wire mesh is a layer. The steel wire mesh is divided into two layers; the two layers are arranged in an overlapping or spaced mode. The steel wire mesh is more than three layers; the more than three layers are arranged in a superposition or/and interval mode. The interval range between the adjacent steel wire meshes arranged at intervals of the steel wire meshes is 0-300 mm.

The national six post-processor, wherein: the diameter range of the steel wire mesh is 0.05mm-1.5 mm. The mesh number range of the steel wire mesh is 5-120 meshes.

The national six post-processor, wherein: the bracket is matched and positioned at one side of the mixer and comprises a base plate horizontally arranged in a urea mixing cavity of the mixing box shell; one side end of the substrate in the horizontal direction is bent upwards at an angle of 90 degrees and extends to form an upper connecting plate, and the other end of the substrate in the horizontal direction is bent downwards at an angle of 90 degrees and extends to form a lower connecting plate; the upper connecting plate with mixing box casing upside inner wall fixed connection, the lower connecting plate with mixing box casing's downside inner wall fixed connection. The gas guide pipe is vertically arranged on the base plate, the lower end of the gas guide pipe extends to the lower part of the base plate and is provided with a rotary vane pipe in a matching and coaxial manner, and the upper end of the gas guide pipe extends to the upper part of the base plate and is provided with another rotary vane pipe in a matching and coaxial manner; the lower end pipe body of the air duct extending out of the lower portion of the substrate is of a mesh pipe structure. The front end of the DOC oxidation catalyst is provided with an air inlet pipe in a matching way; the front end of the mixing box shell is fixedly connected with the rear end of the PDF particle catcher in a matching way through a flange; the front end of the SCR catalysis box assembly is fixedly connected with the rear end of the mixing box shell in a matched mode through a flange, and an air outlet pipe is arranged at the rear end of the SCR catalysis box assembly in a matched mode.

Has the advantages that:

the utility model discloses a six aftertreatment in state structural design are simple, reasonable, especially match the wire net more than one deck and one deck at the inside axial of upper end body of air duct along the interval installation, through the mode of the steel wire of spraying liquid drop striking wire net, promote the crushing efficiency of spraying liquid drop, can effectively promote the vaporization effect and the homogeneity of aftertreatment device's urea mixing chamber, have effectively prevented mixed intracavity urea crystallization.

Drawings

Fig. 1 is a front view of the sixth postprocessor of the present invention;

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1 of the sixth aftertreatment apparatus of the present invention;

FIG. 3 is an external view of a nozzle holder of a urea mixing tank of a six post-processor of the present invention;

fig. 4 is a sectional view of the sixth postprocessor of the present invention in the direction B-B in fig. 4.

Detailed Description

As shown in fig. 1 to 4, the present invention relates to a six-way post-processor, which comprises a DOC oxidation catalyst 1, a PDF particle catcher 2, a urea mixing box 3 and an SCR catalyst box assembly 4.

The DOC oxidation catalyst 1 is positioned at the front part of the after-treatment device, and the front end of the DOC oxidation catalyst is provided with an air inlet pipe 11 in a matching way.

The PDF particle catcher 2 is matched and arranged at the rear end of the DOC oxidation catalyst 1; wherein, the front end of the PDF particle catcher 2 is fixedly connected with the rear end of the DOC oxidation catalyst 1 through a flange in a matching way.

The urea mixing box 3 is fittingly mounted to the rear end of the PDF particle trap 2, and comprises a mixing box housing 31, a nozzle holder 32, a bracket 33, an air duct 34, a rotary vane tube 35 and a mixer 36.

The mixing box shell 31 is internally provided with a urea mixing cavity, and the front end of the mixing box shell is fixedly connected with the rear end of the PDF particle catcher 2 through a flange in a matching way.

The nozzle holder 32 is fittingly mounted on the outer wall of the mixing box housing 31, and the bottom injection port 321 is located in the urea mixing chamber of the mixing box housing 31.

The bracket 33 is installed in the urea mixing cavity of the mixing box shell 31 in a matching way, is located on one side of the mixer 36 in a matching way, and comprises a base plate horizontally arranged in the urea mixing cavity of the mixing box shell 31; one side end of the substrate in the horizontal direction is bent upwards by 90 degrees and extends to form an upper connecting plate, the other end of the substrate in the horizontal direction is bent downwards by 90 degrees and extends to form a lower connecting plate, the upper connecting plate is fixedly connected with the inner wall of the upper side of the mixing box shell 31, and the lower connecting plate is fixedly connected with the inner wall of the lower side of the mixing box shell 31.

The air duct 34 is vertically installed on the base plate of the bracket 33, the lower end of the air duct extends to the lower part of the base plate and is coaxially installed with a rotary vane tube 35 in a matching way, and the upper end of the air duct extends to the upper part of the base plate and is coaxially installed with another rotary vane tube 35 in a matching way. The upper end pipe orifice of the air duct 34 is matched and aligned with the bottom jet orifice 321 of the nozzle seat 32, one or more layers of steel wire meshes 341 are arranged in the upper end pipe orifice of the air duct 34 in a matched and axially matched mode at intervals, and the vaporization effect and uniformity of the urea mixing cavity of the national post-processor and the national post-processor can be effectively improved by additionally arranging the steel wire meshes 341. The optimal range of the number of the steel wire meshes 341 is 1 to 10, and the optimal range of the distance between adjacent steel wire meshes 341 is 0 to 300 mm; the optimal range of the wire diameter of the steel wire mesh 341 is 0.05mm-1.5 mm; the mesh number of the steel mesh 341 is preferably in the range of 5 mesh to 120 mesh.

The mixer 36 is installed in the urea mixing chamber of the urea mixing tank 3 and is located at one side of the bracket 33 in the horizontal direction.

The SCR catalytic box assembly 4 is arranged at the rear end of the urea mixing box 3 in a matching way; wherein, the front end of this SCR catalysis case assembly 4 passes through flange and the rear end matching connection of the mixing box casing 31 of this urea mixing box 3 to be fixed, and the rear end matching of this SCR catalysis case assembly 4 is provided with outlet duct 41.

The utility model has the advantages of simple and reasonable design, match the wire net more than one deck at the inside axial of the upper end body of air duct and install one deck and one deck, through the mode of the steel wire of spraying liquid drop striking wire net, promote the crushing efficiency of spraying liquid drop, effectively promote the vaporization effect and the homogeneity of aftertreatment device's urea mixing chamber, prevented mixing intracavity urea crystallization.

Claims

1. A national six post-processor comprises a DOC oxidation catalyst, a PDF particle catcher, a urea mixing box and an SCR catalytic box assembly which are sequentially arranged; the urea mixing box comprises a mixing box shell, a nozzle seat matched and installed on the outer wall of the mixing box shell, and an air guide pipe and a mixer matched and installed inside a urea mixing cavity of the mixing box shell; the pipe orifice of the upper end pipe body of the gas guide pipe is matched and aligned with the bottom jet orifice of the nozzle seat; the method is characterized in that: and a steel wire mesh is axially and matchedly arranged inside the upper end pipe body of the air duct.

2. The national six post-processor of claim 1, wherein: the steel wire mesh is a layer.

3. The national six post-processor of claim 1, wherein: the steel wire mesh is divided into two layers; the two layers are arranged in an overlapping or spaced mode.

4. The national six post-processor of claim 1, wherein: the steel wire mesh is more than three layers; the more than three layers are arranged in a superposition or/and interval mode.

5. The national six post-processor of claim 4, wherein: the interval range between the adjacent steel wire meshes arranged at intervals of the steel wire meshes is 0-300 mm.

6. The national six post-processor of claim 1, wherein: the diameter range of the steel wire mesh is 0.05mm-1.5 mm.

7. The national six post-processor of claim 1, wherein: the mesh number range of the steel wire mesh is 5-120 meshes.

8. The national six post-processor of claim 1, wherein: the air duct is installed in a urea mixing cavity of the mixing box shell through a bracket.

9. The national six post-processor of claim 8, wherein: the bracket is matched and positioned at one side of the mixer and comprises a base plate horizontally arranged in a urea mixing cavity of the mixing box shell; one side end of the substrate in the horizontal direction is bent upwards at an angle of 90 degrees and extends to form an upper connecting plate, and the other end of the substrate in the horizontal direction is bent downwards at an angle of 90 degrees and extends to form a lower connecting plate; the upper connecting plate with mixing box casing upside inner wall fixed connection, the lower connecting plate with mixing box casing's downside inner wall fixed connection.

10. The national six post-processor of claim 9, wherein: the gas guide pipe is vertically arranged on the base plate, the lower end of the gas guide pipe extends to the lower part of the base plate and is provided with a rotary vane pipe in a matching and coaxial manner, and the upper end of the gas guide pipe extends to the upper part of the base plate and is provided with another rotary vane pipe in a matching and coaxial manner; the lower end pipe body of the air duct extending out of the lower portion of the substrate is of a mesh pipe structure.