CN208578614U - A kind of combined SCR after-treatment device - Google Patents
A kind of combined SCR after-treatment device Download PDFInfo
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- CN208578614U CN208578614U CN201821014208.9U CN201821014208U CN208578614U CN 208578614 U CN208578614 U CN 208578614U CN 201821014208 U CN201821014208 U CN 201821014208U CN 208578614 U CN208578614 U CN 208578614U
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- straight pipe
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Abstract
The utility model discloses a kind of combined SCR after-treatment devices, realize different arrangements by the change of each components setting angle of after-treatment device, connection type, meet vertical, horizontal, three kinds of arrangements of inclination the demand to after-treatment device；In addition, quantity by adjusting the matched after-treatment device of engine or the catalyst assembly quantity by increase and decrease after-treatment device connection, it can satisfy the emissions requirements of 16L-65L engine difference discharge phase, reduce research and development cost and manufacturing cost caused by exploitation amelioration product.This programme can satisfy the demand of different arrangement spaces；Simpler, reduction exploitation and manufacturing cost are arranged in its generalization, modular design concept；Unique mixing tube design, reinforces flow perturbation effect, promotes urea atomization to decompose, prevents urea deposits, air-flow mixing uniformity is turned up.
Description
Technical field
The utility model relates to technical field of engines, in particular to a kind of combined SCR after-treatment device.
Background technique
In order to reduce environmental pollution, the exhaust of engine is post-processed.
Currently, the matched after-treatment device volume of large-duty engine is larger, development cycle length, die sinking and manufacturing expense
It is high.Because arrangement space and arrangement demand difference cause after-treatment device to develop amelioration product, exploitation and manufacturing cost are caused
Increase.
Utility model content
In view of this, the present invention provides a kind of combined SCR after-treatment devices, pass through after-treatment device each zero
Different arrangements are realized in the change of component setting angle, connection type, meet vertical, horizontal, inclination to after-treatment device
The demand of three kinds of arrangements reduces research and development cost and manufacturing cost caused by exploitation amelioration product.
To achieve the above object, the utility model provides the following technical solutions:
A kind of combined SCR after-treatment device, comprising: flange, air inlet mixing tube, straight pipe mixing tube and catalyst group
Part；
The straight pipe mixing tube is connected to the downstream of the air inlet mixing tube, and the catalyst assembly is connected to described straight
The downstream of pipeline section mixing tube passes through the flanged joint between each adjacent tubes and component；
The air inlet mixing tube offers reducing agent spout.
It preferably, further include the bend pipe being connected between the air inlet mixing tube and the straight pipe mixing tube.
Preferably, the bend pipe that the bend pipe is 180 °, the straight pipe mixing tube are parallel to the air inlet mixing tube.
Preferably, the bend pipe that the bend pipe is 90 °, the straight pipe mixing tube is perpendicular to the air inlet mixing tube.
Preferably, fence type mixer is disposed in air inlet mixing tube.
Preferably, fence type mixer is disposed in the straight pipe mixing tube.
Preferably, the quantity of the catalyst assembly is multiple and connects.
Preferably, including a plurality of after-treatment device branch, every after-treatment device branch include the flange, it is described into
Gas mixing tube, the straight pipe mixing tube and the catalyst assembly.
It can be seen from the above technical scheme that combined SCR after-treatment device provided by the utility model, by rear
Different arrangements are realized in the change of each components setting angle of processing unit, connection type, and satisfaction erects after-treatment device
Directly, horizontal, three kinds of arrangements of inclination demand；In addition, by adjusting the matched after-treatment device of engine quantity or
By the catalyst assembly quantity of increase and decrease after-treatment device connection, the row of 16L-65L engine difference discharge phase can satisfy
Demand is put, research and development cost and manufacturing cost caused by exploitation amelioration product are reduced.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the configuration schematic diagram of combined SCR after-treatment device provided by the embodiment of the utility model；
Fig. 2 is the after-treatment device provided by the embodiment of the utility model horizontally disposed structural representation in portion on the engine
Figure；
Fig. 3 is after-treatment device provided by the embodiment of the utility model in the horizontally disposed structural representation of external engine
Figure；
Fig. 4 is the structural schematic diagram that after-treatment device provided by the embodiment of the utility model is arranged vertically；
Fig. 5 a be it is provided by the embodiment of the utility model connection two groups of catalyst assemblies after-treatment device on the engine
The horizontally disposed structural schematic diagram in portion；
Fig. 5 b is the after-treatment device of two groups of catalyst assemblies of connection provided by the embodiment of the utility model outside engine
The horizontally disposed structural schematic diagram in portion；
Fig. 5 c is that the after-treatment device of two groups of catalyst assemblies of connection provided by the embodiment of the utility model is arranged vertically
Structural schematic diagram；
Fig. 6 is the structural schematic diagram that matching provided by the embodiment of the utility model covers after-treatment device more.
Wherein, 1 is flange, and 2 be air inlet mixing tube, and 3 be bend pipe, and 4 be straight pipe mixing tube, and 5 be catalyst assembly.
Specific embodiment
Firstly, being explained as follows to the technical term that this programme is related to:
SCR technology (Selective Catalytic Reduction, SCR) refer to using ammonia, ammonium hydroxide,
Urea or hydro carbons are reducing agent, under conditions of oxygen concentration is higher by two orders of magnitude of NOx concentration or more, preferential handle with high selectivity
NOx is reduced to N2.The effect of catalysis is the activation energy for reducing decomposition reaction, its reaction temperature is made to be reduced to suitable humidity province
Between.Nitrogen oxides (DeNOx) catalytic converter also referred to as drops in selective catalytic reduction converter.
The most common catalyst V on diesel engine for automobile2O5/TiO2Metal oxides type catalyst and Cu based molecular sieve
Catalyst.Not only reduction efficiency is high, active temperature is broad for such catalyst, and performance is stablized.Urea is nontoxic, to environment and people
Class health not will cause big influence, and therefore storage, convenient transportation are more suitable as NOx in vehicle SCR systems
Reducing agent.It is much mounted with that the heavy truck of Urea-SCR system has begun operation in Europe, and successfully experienced road
Reliability test.But since the freezing point of aqueous solution of urea only has -11 DEG C, so may be led in the lower situation of temperature
Urea crystals are caused, diesel engine operation is influenced to prevent from being formed crystallization, needs to take it corresponding Insulation.
The utility model discloses a kind of combined SCR after-treatment devices, effectively solve large-duty engine post-processing
Layout Problem, arrangement versatility is high, Yi Shixian, and cost performance is high.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Combined SCR after-treatment device provided by the embodiment of the utility model, comprising: flange 1, air inlet mixing tube 2, straight
Pipeline section mixing tube 4 and catalyst assembly 5；
Wherein, straight pipe mixing tube 4 is connected to the downstream of air inlet mixing tube 2, and catalyst assembly 5 is connected to straight pipe mixing
The downstream of pipe 4 is connected between each adjacent tubes and component by flange 1；Its structure is referred to shown in Fig. 1 and Fig. 3；
Air inlet mixing tube 2 offers reducing agent spout, for cooperating with urea nozzle seat.
Principle illustrates: the tail gas of engine discharge enters air inlet mixing tube 2, mixed with urea liquid at air inlet mixing tube
It closes, enters catalyst assembly 5 after flowing through straight pipe mixing tube 4, after-treatment device is finally discharged.Air inlet mixing tube, straight pipe are mixed
It closes and is attached between pipe and catalyst assembly with flange 1.Urea nozzle seat is arranged on air inlet mixing tube.
It can be seen from the above technical scheme that combined SCR after-treatment device provided by the embodiment of the utility model,
Its each pipe and component use modularized design, between using the connection structure detachably cooperated with flange, there is versatility, can
Different arrangements are realized by the change of each components setting angle, connection type, meet and after-treatment device difference is arranged
The demand in space reduces exploitation and manufacturing cost；Unique mixing tube design, reinforces flow perturbation effect, promotes urea atomization
It decomposes, prevents urea deposits, air-flow mixing uniformity is turned up.
As shown in figure 3, air inlet mixing tube 2 and straight pipe mixing tube 4 connect, after-treatment device can satisfy outside engine
The horizontally disposed demand in side.
Preferably, combined SCR after-treatment device provided by the utility model, further includes being connected to air inlet mixing tube
Bend pipe 3 between 2 and straight pipe mixing tube 4, structure are referred to shown in Fig. 2 and Fig. 4, are erected with meeting to after-treatment device
Directly, horizontal, three kinds of arrangements of inclination demand.
Specifically, the bend pipe that bend pipe 3 is 180 °, straight pipe mixing tube 4 are parallel to air inlet mixing tube 2, as shown in Figure 2.This
When, after-treatment device may be implemented, and portion is horizontally disposed on the engine.
In another embodiment that this programme provides, the bend pipe that bend pipe 3 is 90 °, straight pipe mixing tube 4 is perpendicular to air inlet
Mixing tube 2, as shown in Figure 4.At this point it is possible to meet the needs of after-treatment device is arranged vertically.It is, of course, also possible to using other shapes
The bend pipe of formula realizes different arrangements, such as tilts, details are not described herein.
Preferably, fence type mixer is disposed in air inlet mixing tube 2, tail gas urea liquid under the action of mixer
Flow at high speed, the urea liquid for ejecting urea nozzle are sufficiently mixed with tail gas in air inlet mixing tube with tail gas, prevent from producing
Raw urea crystals.
In order to advanced optimize above-mentioned technical solution, it is disposed with fence type mixer in straight pipe mixing tube 4, adjusts tail
Gas enters the uniformity of catalyst assembly, improves the utilization rate of catalyst, to improve transformation efficiency.
According to former row's result of engine and emissions object to be achieved is needed, which can increase and decrease urging for connection
Agent component count: one group, two or more groups.In the present embodiment, the quantity of catalyst assembly 5 is multiple and connects.Such as
Fig. 5 a, Fig. 5 b show different post-processing arrangements with Fig. 5 c and connect two groups of catalyst assemblies.
According to former row's result of engine and emissions object to be achieved is needed, matched after-treatment device branch can be increased and decreased
Quantity.Specifically, combined SCR after-treatment device provided by the embodiment of the utility model, including a plurality of after-treatment device
Branch, every after-treatment device branch include flange 1, air inlet mixing tube 2, straight pipe mixing tube 4 and catalyst assembly 5, branch
Assembly relation in road between each part is referred to described above.Preferably, a plurality of after-treatment device leg parallel arrangement.Such as
Fig. 6 show the post-processing of four tunnels of matching, two groups of catalyst assemblies of every flow adaptation.This after-treatment device can meet in this way
The emissions requirements of engine difference discharge phase from 16L to 65L avoid development cycle caused by developing repeatedly and development cost wave
Take, reduces a large amount of expenses that post-processing mould development generates.
This programme is described further combined with specific embodiments below:
The utility model after-treatment device five parts as shown in Figure 1, be mainly made of: flange, air inlet mixing tube, bend pipe,
Straight pipe mixing tube and catalyst assembly.
Principle explanation:
The tail gas of engine discharge enters air inlet mixing tube 2, mixes at air inlet mixing tube with urea liquid, flows through bend pipe
3, enter catalyst assembly 5 after straight pipe mixing tube 4, after-treatment device is finally discharged.Air inlet mixing tube, bend pipe, straight pipe are mixed
It closes and is attached between pipe, catalyst assembly with flange 1.Urea nozzle seat is arranged on air inlet mixing tube.
Arrange fence type mixer in air inlet mixing tube, tail gas under the action of mixer urea liquid and tail gas in air inlet
Flow at high speed in mixing tube, the urea liquid for ejecting urea nozzle are sufficiently mixed with tail gas, prevent urea crystals.Directly
Arrange that fence type mixer, adjustment tail gas enter the uniformity of catalyst assembly, improve the utilization of catalyst in pipeline section mixer
Rate, to improve transformation efficiency.
Different cloth may be implemented by adjusting connection type and layout angle between each components in this SCR after-treatment device
Mode is set, meets the needs of different arrangement space arrangements:
1, arrangement one, as indicated with 2: upper position of engine is horizontally disposed.
2, arrangement two, as indicated at 3: external engine is horizontally disposed.Bend pipe is cancelled, air inlet mixing tube and straight pipe
Mixing tube connection, can satisfy after-treatment device horizontally disposed demand on the outside of engine.
3, arrangement three, as indicated at 4: vertical arrangement.Bend pipe structure is only needed replacing, other component is without changing, just
The demand that after-treatment device is arranged vertically may be implemented.
According to former row's result of engine and emissions object to be achieved is needed, which can increase and decrease urging for connection
Agent component count: one group, two or more groups are connected as Fig. 5 a, Fig. 5 b show different post-processing arrangements with Fig. 5 c
Two groups of catalyst assemblies.
According to former row's result of engine and emissions object to be achieved is needed, matched after-treatment device branch can be increased and decreased
Quantity, be illustrated in figure 6 matching four tunnels post-processing, two groups of catalyst assemblies of every flow adaptation.In this way after this utility model
Processing unit can meet the emissions requirements of the engine difference discharge phase from 16L to 65L, avoid opening caused by developing repeatedly
Period and development cost waste are sent out, a large amount of expenses that post-processing mould development generates are reduced.
In conclusion passing through after-treatment device each zero the utility model discloses a kind of combined SCR after-treatment device
Different arrangements are realized in the change of component setting angle, connection type, meet vertical, horizontal, inclination to after-treatment device
The demand of three kinds of arrangements；In addition, after by adjusting the quantity of the matched after-treatment device of engine or by increase and decrease
The catalyst assembly quantity for managing device connection, can satisfy the emissions requirements of 16L-65L engine difference discharge phase, reduction is opened
Send out research and development cost and manufacturing cost caused by amelioration product.This programme can satisfy the demand of different arrangement spaces；Its generalization,
Modular design concept arranges simpler, reduction exploitation and manufacturing cost；Unique mixing tube design, reinforces flow perturbation and makees
With promotion urea atomization is decomposed, and prevents urea deposits, air-flow mixing uniformity is turned up.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of combined SCR after-treatment device characterized by comprising flange (1), air inlet mixing tube (2), straight pipe
Mixing tube (4) and catalyst assembly (5)；
The straight pipe mixing tube (4) is connected to the downstream of the air inlet mixing tube (2), and the catalyst assembly (5) is connected to
The downstream of the straight pipe mixing tube (4) is connected between each adjacent tubes and component by the flange (1)；
The air inlet mixing tube (2) offers reducing agent spout.
2. combined SCR after-treatment device according to claim 1, which is characterized in that further include be connected to it is described into
Bend pipe (3) between gas mixing tube (2) and the straight pipe mixing tube (4).
3. combined SCR after-treatment device according to claim 2, which is characterized in that the bend pipe (3) is 180 °
Bend pipe, the straight pipe mixing tube (4) are parallel to the air inlet mixing tube (2).
4. combined SCR after-treatment device according to claim 2, which is characterized in that the bend pipe (3) is 90 °
Bend pipe, the straight pipe mixing tube (4) is perpendicular to the air inlet mixing tube (2).
5. combined SCR after-treatment device according to claim 1, which is characterized in that arrangement in air inlet mixing tube (2)
There is fence type mixer.
6. combined SCR after-treatment device according to claim 1, which is characterized in that the straight pipe mixing tube (4)
Inside it is disposed with fence type mixer.
7. combined SCR after-treatment device according to claim 1, which is characterized in that the catalyst assembly (5)
Quantity is multiple and connects.
8. combined SCR after-treatment device according to claim 1, which is characterized in that including a plurality of after-treatment device
Branch, every after-treatment device branch include the flange (1), the air inlet mixing tube (2), the straight pipe mixing tube
(4) and the catalyst assembly (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014208.9U CN208578614U (en) | 2018-06-28 | 2018-06-28 | A kind of combined SCR after-treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014208.9U CN208578614U (en) | 2018-06-28 | 2018-06-28 | A kind of combined SCR after-treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208578614U true CN208578614U (en) | 2019-03-05 |
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ID=65508179
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821014208.9U Active CN208578614U (en) | 2018-06-28 | 2018-06-28 | A kind of combined SCR after-treatment device |
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| Country | Link |
|---|---|
| CN (1) | CN208578614U (en) |
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2018
- 2018-06-28 CN CN201821014208.9U patent/CN208578614U/en active Active
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