CN206928994U - A kind of DOC+CDPF after-treatment systems with preposition blender - Google Patents
A kind of DOC+CDPF after-treatment systems with preposition blender Download PDFInfo
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- CN206928994U CN206928994U CN201720190448.3U CN201720190448U CN206928994U CN 206928994 U CN206928994 U CN 206928994U CN 201720190448 U CN201720190448 U CN 201720190448U CN 206928994 U CN206928994 U CN 206928994U
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- doc
- cdpf
- blender
- increaser
- reducing pipe
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Abstract
The utility model discloses a kind of DOC+CDPF after-treatment systems with preposition blender, belong to diesel particulate trap field, one blender of series connection, internal mixer are provided with first support before DOC+CDPF after-treatment systems, and first support is provided with rotatable impeller.Internal mixer is additionally provided with the reducing pipe and increaser for being coaxial therewith the heart, and increaser is located at the inside of reducing pipe, and the inner space of blender divide into three passages by the middle part and rear portion of reducing pipe and increaser provided with through hole, reducing pipe and increaser.Tail gas disturbance can be strengthened by installing blender additional before DOC+CDPF systems, so that the flow velocity of DOC/CDPF central areas and borderline region almost keeps identical, the problems such as localized hyperthermia occur and can not be fully using DOC catalysis effective areas is loaded in uneven, DOC/CDPF so as to solve CDPF particulate matters.Its is simple in construction, easy to operate, cheap, has extremely strong practicality.
Description
Technical field
It the utility model is related to diesel particulate trap field, and in particular to a kind of DOC+ with preposition blender
CDPF after-treatment systems.
Background technology
Diesel engine is due to fuel-economy, reliability is high and is widely used, but its particulate matter (PM) discharge capacity is big, is equal
30~80 times of power gasoline engine.With the development of technology, diesel particulate trap (DPF) has turned into reduction PM outside machine most to be had
One of device of effect.With increasingly strict, the diesel oxidation catalyst (DOC)+catalytic type diesel particulate of the discharge standard of state VI
Filter (CDPF) system is as the indispensable selection of diesel engine after treatment.But due to the entrance blast pipe of the after-treatment system
Road diameter is much smaller than DOC/CDPF catalyst carrier diameters, so as to cause DOC/CDPF central area tail gas flow velocity to be more than edge
Region tail gas flow velocity, therefore, occurring that loading is uneven in CDPF particulate matter loading procedures causes CDPF in regenerative process
Being likely to occur localized hyperthermia causes the situation of carrier scorification, and DOC effective catalysis is underused in CO/HC/NO oxidizing process
The problems such as area causes transformation efficiency relatively low.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of DOC+CDPF post processings system with preposition blender
System, solve existing DOC+CDPF system particles thing and load uneven, carrier because there is localized hyperthermia the problems such as scorification, improve
The transformation efficiency of DOC+CDPF systems.
In order to solve the above technical problems, technical scheme is used by the utility model：
A kind of DOC+CDPF after-treatment systems with preposition blender, including DOC, DOC rear end are connected with CDPF,
CDPF rear end is connected with tapered connecting tube, and the small end of tapered connecting tube is connected with heel row tracheae；DOC front end is connected with mixing
Device, the front end of blender are connected with flaring connecting tube, and the small end of flaring connecting tube is connected with front exhaust pipe；The internal mixer
Provided with first support, first support is provided with rotatable impeller.
According to such scheme, the internal mixer is additionally provided with the reducing pipe and increaser for being coaxial therewith the heart；Reducing pipe and
The front end of increaser is connected to first support, and rear end is connected to the second support located at mixer outlet end；Increaser is positioned at gradually
The middle part and rear portion of the inside of the draw, reducing pipe and increaser are provided with through hole, reducing pipe and increaser, and the inside of blender is empty
Between divide into three passages.
Compared with prior art, the beneficial effects of the utility model are：Installing blender additional before DOC+CDPF systems can
Strengthen tail gas disturbance so that the flow velocity of DOC/CDPF central areas and borderline region almost keeps identical, so as to solve
The loading of CDPF particulate matters is uneven, occurs localized hyperthermia in DOC/CDPF and fully can not be catalyzed effective area etc. using DOC
Problem.Its is simple in construction, easy to operate, cheap, has extremely strong practicality.
Brief description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings, wherein：
Fig. 1 is general structure schematic diagram of the present utility model；
Fig. 2 is the structural representation of blender.
Each label is interpreted as in figure：1- front exhaust pipes, 2- flaring connecting tubes, 3- blenders, 4-DOC, 5- ring flanges, 6-
The tapered connecting tube of CDPF, 7-, 8- heel row tracheaes.
Embodiment
The utility model is mainly made up of DOC4, CDPF6 and blender 3, a diameter of 199.5mm DOC4 and a diameter of
199.5mm CDPF6 is encapsulated in inside the cylindrical metal container that internal diameter is 202mm, metal shell and DOC4, CDPF6
Carrier between using pad sealing.It is 202mm that metal shell both ends, which are welded with internal diameter, and external diameter is 268mm ring flange 5,
Ring flange 5 is provided with 4 through holes, and M12 bolt connections are used between ring flange 5.Connected before DOC4+CDPF6 after-treatment systems
One blender 3 with impeller, the front end of blender 3 are connected with flaring connecting tube 2, and CDPF6 rear ends are connected with tapered connecting tube
7, the front end of flaring connecting tube 2 is connected with front exhaust pipe 1, and the tapered rear end of connecting tube 7 is connected with heel row tracheae 8, the He of flaring connecting tube 2
Tapered connecting tube 7 is made using stainless steel material.
Blender 3 is mainly made up of metal shell, support, impeller and ring flange 5.The metal shell diameter of blender 3 with
The metal shell diameter of DOC4 encapsulation is identical, and both ends are welded with ring flange 5.Two are welded with metal shell inside mutually to hang down
Straight first support, the side of first support are provided with the impeller with three blades, and impeller can rotate freely on support.First
The opposite side of support is provided with the reducing pipe and increaser concentric with housing, and increaser is located at the inside of reducing pipe, reducing pipe and
The inner space of blender 3 divide into 3 passages by increaser.The middle part and rear portion of reducing pipe and increaser are evenly distributed with logical
Hole, the second support for fixing reducing pipe and increaser is welded with the exit of blender 3.The operation principle of blender 3
For：Swiftly flowing tail gas passes through impeller, produces thrust on the blade of impeller, impeller is rotated on support, so as to strengthen
Tail gas disturbance.But by the tail gas of impeller, flow velocity diametrically is not substantially uniformity.As tail gas is different logical at 3
Flowed through in road, because passage is tapered face or flaring face, so tail gas flow velocity can change, the then part in different passages
Tail gas can pass through the through hole that reducing pipe or increaser postmedian are set and is complementary to one another, and further strengthen the base of tail gas disturbance
On plinth, it is more uniformly distributed flow velocity radially.
When in use, first DOC4, CDPF6 and blender 3 are got up by ring flange 5 and bolt connection in sequence, then
Increaser 2 is connected in the front end of blender 3, CDPF6 rear end connection reducing pipe 7, is finally connected increaser 2 and front exhaust pipe 1
It is connected to together, reducing pipe 7 is connected together with heel row tracheae 8.
Claims (2)
- A kind of 1. DOC+CDPF after-treatment systems with preposition blender, it is characterised in that：Including DOC (4), after DOC (4) End is connected with CDPF (6), and CDPF (6) rear end is connected with tapered connecting tube (7), the small end of tapered connecting tube (7) and final vacuum Manage (8) connection；DOC (4) front end is connected with blender (3), and the front end of blender (3) is connected with flaring connecting tube (2), flaring The small end of connecting tube (2) is connected with front exhaust pipe (1)；First support is provided with inside the blender (3), first support is provided with Rotatable impeller.
- A kind of 2. DOC+CDPF after-treatment systems with preposition blender according to claim 1, it is characterised in that：Institute State and be additionally provided with the reducing pipe and increaser for being coaxial therewith the heart inside blender (3)；The front end of reducing pipe and increaser is connected to One support, rear end are connected to the second support located at mixer outlet end；Increaser is located at the inside of reducing pipe, reducing pipe and gradually The middle part and rear portion of expander are provided with through hole, reducing pipe and increaser and the inner space of blender divide into three passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720190448.3U CN206928994U (en) | 2017-03-01 | 2017-03-01 | A kind of DOC+CDPF after-treatment systems with preposition blender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720190448.3U CN206928994U (en) | 2017-03-01 | 2017-03-01 | A kind of DOC+CDPF after-treatment systems with preposition blender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206928994U true CN206928994U (en) | 2018-01-26 |
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ID=61349152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720190448.3U Active CN206928994U (en) | 2017-03-01 | 2017-03-01 | A kind of DOC+CDPF after-treatment systems with preposition blender |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206928994U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159406A (en) * | 2019-07-09 | 2019-08-23 | 苏州怀德自控科技有限公司 | Diesel motor exhaust processor |
| CN111810277A (en) * | 2019-04-10 | 2020-10-23 | 江苏伟博动力技术有限公司 | Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage |
-
2017
- 2017-03-01 CN CN201720190448.3U patent/CN206928994U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810277A (en) * | 2019-04-10 | 2020-10-23 | 江苏伟博动力技术有限公司 | Aftertreatment exhaust device capable of reducing DOC (catalyst treated) blockage |
| CN110159406A (en) * | 2019-07-09 | 2019-08-23 | 苏州怀德自控科技有限公司 | Diesel motor exhaust processor |
| CN110159406B (en) * | 2019-07-09 | 2024-01-23 | 苏州怀德自控科技有限公司 | Diesel engine tail gas processor |
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