Novel high-efficient DPF blender
阅读说明：本技术 一种新型的高效dpf混合器 (Novel high-efficient DPF blender ) 是由 周爽 沈明 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种新型的高效DPF混合器,喷射底座固定于壳体上端,该喷射底座上设有尾气入口和尿素喷射口,混合板和导流板分别设置于壳体内中部和下部,混合板包括一体成型的第一分板和第二分板,第二分板位于壳体中部,其中部具有拱起,拱起位于尾气入口的下方,其远离壳体一侧连接呈斜向上延伸且抵接于喷射底座的第一分板,第一分板位于尿素喷射口与尾气入口之间,导流板呈螺旋状,其末端形成主出气口,主出气口连通壳体下端出气区,本发明通过拱起使尾气迅速分流加速其实现其大范围内扩散,且由于螺旋状的导流板实现螺旋状下降运动,可与已经进入混合区且呈扩散状态的尿素进行充分接触,在小空间内提高处理效果和效率。(The invention discloses a novel high-efficiency DPF mixer, wherein an injection base is fixed at the upper end of a shell, a tail gas inlet and a urea injection port are arranged on the injection base, a mixing plate and a guide plate are respectively arranged at the middle part and the lower part in the shell, the mixing plate comprises a first sub-plate and a second sub-plate which are integrally formed, the second sub-plate is positioned at the middle part of the shell, the middle part of the mixing plate is provided with an arch which is positioned below the tail gas inlet, one side of the mixing plate, far away from the shell, is connected with the first sub-plate which extends obliquely upwards and is abutted against the injection base, the first sub-plate is positioned between the urea injection port and the tail gas inlet, the guide plate is spiral, the tail end of the guide plate forms a main gas outlet, the main gas outlet is communicated with a gas outlet area at the lower end of the shell, the tail gas is quickly divided by the arch to accelerate the diffusion of, the treatment effect and efficiency are improved in a small space.)
1. The novel high-efficiency DPF mixer is characterized by comprising a shell (1), an injection base (2), a mixing plate (3) and a guide plate (4), wherein the injection base (2) is fixed at the upper end of the shell (1), a tail gas inlet (21) and a urea injection port (22) are arranged on the injection base (2), the mixing plate (3) and the guide plate (4) are respectively arranged at the middle part and the lower part in the shell (1), a mixing area is formed between the mixing plate and the injection base, the mixing plate (3) comprises a first sub-plate (32) and a second sub-plate (31) which are integrally formed, the second sub-plate (31) is positioned at the middle part of the shell (1) to realize tail gas diversion, an arch (311) is arranged at the middle part of the second sub-plate, the arch (311) is positioned below the tail gas inlet (21), one side, far away from the shell (1), of the second sub-plate is connected with the first sub-plate (32, the first sub-plate (32) is located between the urea injection port (22) and the tail gas inlet (21), the guide plate (4) extends to the lower portion of the shell (1) from the lower portion of the mixing plate (3) in a spiral shape, a main air outlet (42) is formed at the tail end of the guide plate (4), and the main air outlet (42) is communicated with an air outlet area of the lower end area of the shell (1).
2. The novel high efficiency DPF mixer of claim 1, wherein the second divider plate (31) has a flow guide port (312) and a flow guide table (313) on both sides, respectively, the flow guide table (313) being disposed obliquely to the mixing zone.
3. The novel high-efficiency DPF mixer as claimed in claim 2, wherein the head end of the guide plate (4) is located below the inclined guide table (313), a first auxiliary air outlet (43) is located below the guide table (313), and the first auxiliary air outlet (43) is communicated with the air outlet area.
4. The novel high efficiency DPF mixer as claimed in claim 3, wherein a plurality of second auxiliary air outlets (44) are provided on the deflector (4) between the first auxiliary air outlet (43) and the main air outlet (42), and the plurality of second auxiliary air outlets (44) are all communicated with the air outlet area and are located below the arch (311).
5. The new type of high efficiency DPF mixer as defined in claim 4, wherein the top ends of the first auxiliary air outlet (43) and the second auxiliary air outlet (44) are each provided with a boss (401) around its circumference, and the lower ends thereof are each provided with a flow guiding slope (402) around its circumference.
6. The novel high efficiency DPF mixer as claimed in claim 1, wherein a main air outlet (42) is formed on the connecting plate (41) between the head end and the tail end of the deflector (4), and the main air outlet (42) is vertically arranged.
7. A new type of high efficiency DPF mixer according to claim 1, characterized by the fact that both the mixing plate (3) and the deflector plate (4) are provided with a plurality of perforations (51).
8. A new type of high efficiency DPF mixer according to claim 1, characterized by the fact that the mixing plate (3) and the deflector plate (4) are welded to the inner wall of the casing (1) by a first rim (314) and a second rim (45), respectively, on the respective body.
9. The novel high efficiency DPF mixer as claimed in claim 1, wherein a socket (23) is provided on the injection base (2), and a slip (321) is provided on the first sub plate (32), the slip (321) is embedded in the socket (23) to position the mixing plate (3) on the injection base (2).
10. A new type of high efficiency DPF mixer according to claim 1, characterized by the fact that the injection base (2) has a conical structure, the exhaust gas inlet (21) being located at the top end of the conical structure.
Technical Field
The invention relates to the technical field of DPF mixer devices, in particular to a novel efficient DPF mixer.
Background
The diesel engine DPF system is a diesel engine tail gas treatment system, can burn the tail gas of the diesel engine once more, improves the utilization rate of fuel, and the multi-cavity integrated combustion mixer is an important component part of the DPF system and is a combustion chamber of the tail gas of the diesel engine. How to improve the mixing efficiency and the mixing uniformity of the urea and the tail gas in a small mixing space becomes a technical problem which needs to be solved urgently by the technical personnel in the field.
Chinese patent CN105545425A discloses a modular mixer inlet and mixer assembly for providing a compact mixer, the mixer having an upstream end and a downstream end, and a mixer inlet body having a closed end and an open end, the open end being attached to the upstream end of the mixer, the mixer inlet body comprising a peripheral surface extending from the closed end to the open end to surround a central axis, the peripheral surface comprising an inlet end, and wherein the closed end comprises a spiral formation that initiates a swirling motion of exhaust gas exiting the inlet port. This technical scheme makes the exhaust form the swirl motion in the blender, but tail gas is insufficient with the contact of urea at the fast rotation in-process, can lead to the tail gas treatment effect not good enough on the one hand, and on the other hand still can lead to the urea crystallization to accumulate in the blender, influences blender work efficiency.
Disclosure of Invention
The invention aims to provide a novel high-efficiency DPF mixer, which can quickly divide and accelerate exhaust gas through arching to realize large-range diffusion of the exhaust gas, can fully contact with urea which enters a mixing zone and is in a diffusion state due to spiral descending motion of a spiral guide plate, and can improve treatment effect and efficiency in a small space.
In order to achieve the purpose, the invention adopts the technical scheme that: a novel high-efficiency DPF mixer comprises a shell, an injection base, a mixing plate and a guide plate, wherein the injection base is fixed at the upper end of the shell, the spraying base is provided with a tail gas inlet and a urea spraying opening, the mixing plate and the guide plate are respectively arranged at the middle part and the lower part in the shell, a mixing area is formed between the mixing plate and the guide plate, the mixing plate comprises a first sub-plate and a second sub-plate which are integrally formed, the second sub-plate is positioned in the middle of the shell to realize tail gas diversion, the middle part of the exhaust gas inlet is provided with an arch which is positioned below the exhaust gas inlet, one side of the arch, which is far away from the shell, is connected with a first partial plate which extends upwards in an inclined way and is abutted against the injection base, the first splitter plate is positioned between the urea injection port and the tail gas inlet, the guide plate extends to the lower part of the shell from the lower part of the mixing plate in a spiral shape, the tail end of the guide plate forms a main air outlet which is communicated with an air outlet area of the lower end area of the shell.
As a further optimization, two sides of the second subplate are respectively provided with a flow guide port and a flow guide platform, and the flow guide platform is obliquely arranged towards the mixing area.
As a further optimization, the head end of the guide plate is located below the inclined guide table, a first auxiliary air outlet is arranged below the guide table, and the first auxiliary air outlet is communicated with the air outlet area.
As a further optimization, a plurality of second auxiliary air outlets are arranged on the guide plate and between the first auxiliary air outlet and the main air outlet, and the plurality of second auxiliary air outlets are communicated with the air outlet area and are positioned below the arch.
As a further optimization, the top ends of the first auxiliary air outlet and the second auxiliary air outlet are respectively provided with a boss around the periphery of the first auxiliary air outlet and a boss around the periphery of the second auxiliary air outlet, and the lower ends of the first auxiliary air outlet and the second auxiliary air outlet are respectively provided with a flow guide inclined plane around the periphery of the second auxiliary air outlet.
As a further optimization, a main air outlet is formed on the connecting plate between the head end and the tail end of the guide plate and is vertically arranged.
As a further optimization, a plurality of perforations are arranged on the mixing plate and the guide plate.
As a further optimization, the mixing plate and the flow guide plate are welded to the inner wall of the casing by a first and a second bead on the respective body, respectively.
As a further optimization, a socket is arranged on the injection base, a cutting is arranged on the first splitter plate, and the cutting is embedded into the socket to position the mixing plate on the injection base.
As a further optimization, the injection base has a conical structure, and the tail gas inlet is positioned at the top end of the conical structure.
Compared with the prior art, the invention has the following beneficial effects:
1. the tail gas is quickly divided and accelerated by the arch to realize the large-range diffusion of the tail gas, the urea is fully atomized by the mixing plate and the guide plate, and the spiral guide plate realizes the spiral descending motion, so that the urea can be fully contacted with the urea which enters the mixing area and is in a diffusion state, and the treatment effect and efficiency can be improved in a small space;
2. the length of the mixer is shortened, the space is reduced, and the space is saved for the structural arrangement of the whole post-processing system.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a structural view showing a positional relationship between a mixing plate and a guide plate according to the present invention.
Fig. 3 is a structural view of a hybrid board of the present invention.
Fig. 4 is a block diagram of a baffle of the present invention.
Fig. 5 is a bottom view structural view of the baffle of the present invention.
In the drawings, 1. a housing; 2. a spray base; 21. a tail gas inlet; 22. a urea injection port; 23. a socket; 3. a mixing plate; 31. a second board; 311. arching; 312. a flow guide port; 313. a flow guide table; 314. a first edge; 315. a concave cavity; 32. a first sub plate; 321. cutting; 4. a baffle; 41. connecting plates; 42. a main air outlet; 43. a first auxiliary air outlet; 44. a second auxiliary air outlet; 45. a second edge; 401. a boss; 402. a diversion bevel; 51. and (6) perforating.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 5, a novel high-efficiency DPF mixer comprises a casing 1, an injection base 2, a mixing plate 3 and a
The tail gas enters through a tail gas inlet of the injection base, and is blocked by the arch in the movement process, the tail gas is shunted towards two sides of the second plate by the arch, and can be quickly dispersed and flow along the intersection area of the shell and the second plate, meanwhile, part of gas can flow along two sides of a bulge (the first plate faces one side of the tail gas inlet) formed by the first plate, and finally enters the mixing area by guiding, and urea enters the injection base through a urea injection port; because the guide plate is spiral, the tail gas guided by the second branch plate flows in a vortex descending mode in the mixing area, in the tail gas flowing process, the tail gas can be fully contacted in a large area (with a concave cavity) below the arch, high-efficiency treatment is realized, and the treated tail gas can enter the gas outlet area from the main gas outlet at the tail end of the guide plate so as to enter the next procedure.
Through the arch and the first arch that divides the board to form, can make tail gas reposition of redundant personnel rapidly and accelerate it and realize its internal diffusion on a large scale, and because the heliciform guide plate realizes heliciform descending motion, can carry out abundant contact with most urea that has got into the mixed zone and be the diffusion state, can improve treatment effect and efficiency in the little space.
The two sides of the
The guide opening is arranged on one side of the arch and can be arranged into various shapes, the guide opening is arranged into a semi-elliptical shape in the invention, so that the sinking flow of gas is more facilitated, the guide table is arranged on the other side of the arch, the second subplate on one side of the guide table has a larger area, so that the tail gas passing through the side can be facilitated to form a vortex-shaped motion, the guide table is inclined towards the mixing area and is helpful to form a descending motion, and the spiral guide plate is assisted to enable part of the tail gas to form a descending vortex motion; in addition, part of tail gas directly enters the mixing area through the flow guide port, and the part of tail gas can collide and contact with the tail gas of the descending vortex motion part below the concave cavity to form triple collision contact with urea sprayed to the concave cavity, so that the contact is more sufficient, and the treatment effect is better.
The head end of the
Because there is the clearance between mixing plate and the guide plate, the tail gas of water conservancy diversion platform water conservancy diversion on mixing plate second subplate has part to the regional motion that the pressure is less in the mixing area, and urea through breaking up also has part to move to this region in, and the two mixes and can flow out through first assistance gas outlet and get into out the gas zone after the contact.
A plurality of second
The second auxiliary air outlet below the arch can enable the tail gas which is converged at the second auxiliary air outlet and treated by urea to partially flow out and enter the air outlet area, and the overall pressure in the mixing area can be reduced.
The first auxiliary air outlet 43 and the second
Bosses are arranged on the first/second auxiliary air outlets, the bosses can realize the turbulent flow effect on the moving air flow, the contact between the tail gas and the urea is further enhanced through the turbulent air flow, and the treatment effect is improved; the area of the auxiliary gas outlet can be enlarged by the diversion inclined plane, so that the treated tail gas leaves the mixing area at an accelerated speed, and the treatment efficiency is improved.
The main air outlet 42 is formed on the connecting plate 41 between the head end and the tail end of the
Both the mixing plate 3 and the
The mixing plate 3 and the
Be equipped with socket 23 on the injection base 2, be equipped with cutting 321 on the
The spraying base 2 has a conical structure, and the exhaust gas inlet 21 is positioned at the top end of the conical structure, so that the diffusion of the exhaust gas in the shell can be accelerated.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
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