CN217055349U

CN217055349U - Mixing chamber for SCR (Selective catalytic reduction) postprocessor

Info

Publication number: CN217055349U
Application number: CN202220723086.0U
Authority: CN
Inventors: 吕福来; 吴均均; 盖伟伟; 张欢乐
Original assignee: Hebei Lantian Automobile Muffler Co ltd
Current assignee: Hebei Lantian Automobile Muffler Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-26
Anticipated expiration: 2032-03-30

Abstract

The utility model relates to the technical field of mixing chambers, in particular to a mixing chamber for an SCR postprocessor; the device has a simple, compact and reasonable structure, can fully mix urea and tail gas, can save mixing time and mixing space, greatly improves gas mixing efficiency, and ensures tail gas treatment effect; the device comprises a cylinder body and baffle plates arranged at two ends of the cylinder body, wherein the cylinder body and the two groups of baffle plates enclose to form a mixing chamber, a plurality of groups of air inlets are arranged on one group of baffle plates, a plurality of groups of air outlets are arranged on the other group of baffle plates, and shutter clapboards are arranged at the plurality of groups of air inlets and the plurality of groups of air outlets; further multiunit air inlet and multiunit gas outlet all become fan-shaped distribution on the enclosure baffle that corresponds, be provided with the urea feed inlet on the barrel wall.

Description

Mixing chamber for SCR (Selective catalytic reduction) postprocessor

Technical Field

The utility model relates to a technical field of hybrid chamber especially relates to a hybrid chamber for SCR aftertreatment ware.

Background

As is well known, a mixing chamber for an SCR aftertreatment device is a device for mixing urea with exhaust gas to perform harmless treatment on the exhaust gas; the grant notice number CN207393286U discloses a barrel type SCR post-treatment spiral-flow type mixing chamber, which comprises a chamber body and a turbulent flow partition plate, wherein the turbulent flow partition plate divides the chamber body into a front chamber body and a rear chamber body, a urea nozzle is arranged on the front chamber body, a spiral-flow-shaped partition plate is arranged in the front chamber body, the urea nozzle is arranged on the front chamber body between the spiral-flow-shaped partition plate and the turbulent flow partition plate, and the spiral-flow-shaped partition plate comprises two arc surfaces which are arranged around the center in a spiral-flow-shaped cross manner; the device has compact design, simple structure and convenient use, the gas in the gas inlet cavity is divided into rotational flows by the rotational flow-shaped partition plate in the cavity, the mixing of ammonia mist can be increased, and the mixed gas flows through the turbulent flow partition plate of the cavity, so that the tail gas and the ammonia gas are mixed more fully, and the treatment of the tail gas is facilitated; the tail gas and urea are mixed by the cyclone-shaped partition plate, the mixing time is long, the mixing efficiency is poor, the spiral partition plate is complex in processing and manufacturing process, and certain use limitation is realized.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a simple structure, compactness, reasonable can make urea and tail gas intensive mixing to can save mixing time and mixing space, greatly improve gas mixing efficiency, guarantee the mixing chamber for the SCR aftertreatment ware of tail gas treatment effect.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the device comprises a cylinder body and baffle plates arranged at two ends of the cylinder body, wherein the cylinder body and the two groups of baffle plates enclose to form a mixing chamber, a plurality of groups of air inlets are arranged on one group of baffle plates, a plurality of groups of air outlets are arranged on the other group of baffle plates, and shutter clapboards are arranged at the plurality of groups of air inlets and the plurality of groups of air outlets; further multiunit air inlet and multiunit gas outlet all become fan-shaped distribution on the enclosure baffle that corresponds, be provided with the urea feed inlet on the barrel wall.

Preferably, a first arc-shaped baffle is arranged in the mixing chamber; the first arc-shaped baffle is arranged corresponding to the air inlet flow.

Preferably, a second arc-shaped baffle is arranged in the mixing chamber.

Preferably, the first arc-shaped baffle and the second arc-shaped baffle are fixedly arranged between the two groups of baffle sealing plates in a socket-and-spigot mode.

Preferably, the louver boards on the air inlet extend out from the opposite side of the mixing chamber in an inclined manner, and the louver boards on the air outlet extend into the mixing chamber in an inclined manner.

Preferably, a urea nozzle seat is fixedly installed at the urea feeding port.

(III) advantageous effects

Compared with the prior art, the utility model provides a mixing chamber for SCR aftertreatment ware possesses following beneficial effect: according to the mixing cavity for the SCR postprocessor, tail gas forms rotational flow through the shutter partition plate at the gas inlet and enters the mixing cavity, urea enters the mixing cavity through the urea feed port, and the urea and the tail gas are fully mixed and reacted under the rotational flow effect, so that the tail gas is harmlessly treated by the urea, the structure is simple, compact and reasonable, the urea and the tail gas can be fully mixed, the mixing time and the mixing space can be saved, the gas mixing efficiency is greatly improved, and the tail gas treatment effect is ensured; meanwhile, the shutter partition plate can be directly bent and formed, and compared with a rotational flow partition plate, the shutter partition plate is simple in structure, convenient and fast to machine and time-saving.

Drawings

Fig. 1 is a schematic external perspective structure of the present invention;

FIG. 2 is a schematic view of the internal cross-sectional three-dimensional structure of the present invention;

fig. 3 is a schematic top view of the present invention;

fig. 4 is a schematic cross-sectional view taken along line a-a of fig. 3 according to the present invention;

in the drawings, the reference numbers: 1. a barrel; 2. sealing a baffle plate; 3. an air inlet; 4. an air outlet; 5. a shutter partition; 6. a urea feed port; 7. a first arced barrier; 8. a second arc baffle; 9. a urea nozzle holder.

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. 1-4, the mixing chamber for the SCR post-processor of the present invention comprises a cylinder 1 and baffle plates 2 installed at two ends of the cylinder 1, wherein the cylinder 1 and two sets of baffle plates 2 enclose a mixing chamber, one set of baffle plate 2 is provided with a plurality of air inlets 3, the other set of baffle plate 2 is provided with a plurality of air outlets 4, and the positions of the plurality of air inlets 3 and the plurality of air outlets 4 are provided with louver baffles 5; further multiunit air inlet 3 and multiunit gas outlet 4 all become fan-shaped and distribute on corresponding seal baffle 2, are provided with urea feed inlet 6 on the barrel 1 wall.

Specifically, a first arc-shaped baffle 7 is arranged in the mixing chamber; first cowl 7 corresponds the setting with the air current that admits air, and first cowl 7's arc portion is towards urea feed inlet 6, and tail gas enters into to the mixing chamber through air inlet 3 indoor, and urea enters into to the mixing chamber through urea feed inlet 6 indoor, and both are fully contacted under first cowl 7 effect to carry out the homodisperse to the air current, realize the homogeneous mixing of urea and tail gas, in order to guarantee the treatment effect to tail gas.

Specifically, a second arc-shaped baffle 8 is arranged in the mixing chamber; the urea and the tail gas after mixing further improve the whirl effect in the mixing chamber through the 8 water conservancy diversion of second cowl, realize the abundant homogeneous mixing of short time of urea and tail gas.

Specifically, the first arc baffle 7 and the second arc baffle 8 are fixedly arranged between the two groups of baffle sealing plates 2 in a socket-and-spigot manner; install between two sets of baffles 2 through the socket joint mode, more ordinary welded connection when guaranteeing installation stability, can improve first cowl 7 and second cowl 8's installation convenience.

Specifically, the shutter partition 5 on the air inlet 3 extends out from the opposite side of the mixing chamber in an inclined manner, and the shutter partition 5 on the air outlet 4 extends into the mixing chamber in an inclined manner; the shutter baffle 5 of 3 departments of air inlet stretches out from mixing chamber heteropleural, does benefit to tail gas and gets into in the mixing chamber, and the shutter baffle 5 of 4 departments of air outlet becomes the slope form and stretches into in the mixing chamber, can play the water conservancy diversion effect to tail gas in, reduces the resistance to tail gas, makes tail gas get into smoothly to the mixing chamber in to make the tail gas after handling discharge smoothly from the mixing chamber.

Specifically, a urea nozzle seat 9 is fixedly arranged at the urea feeding hole 6; be provided with the reservation screw on the urea nozzle seat 9, install the urea nozzle on urea nozzle seat 9 through the bolt, improve the convenience of urea nozzle installation or dismantlement.

When using, tail gas enters into to mixing chamber through air inlet 3, urea spouts into to mixing chamber from urea nozzle department, form the whirl under shutter baffle 5 effects, first cowl 7 distributes to flow equalize urea and the tail gas that gets into, reduce tail gas inlet pressure simultaneously, realize the initial mixing contact of tail gas and urea, under second cowl 8's effect, tail gas becomes the whirl form and flows in mixing chamber, further improve the whirl effect in the mixing chamber, realize the abundant homogeneous mixing of short time of urea and tail gas, after urea is handled tail gas, tail gas can through 4 departments of gas outlet discharge.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 mixing chamber for SCR aftertreatment ware, its characterized in that, includes barrel (1) and installs baffle (2) of sealing at barrel (1) both ends, barrel (1) and two sets of baffle (2) enclose synthetic mixing chamber, are provided with multiunit air inlet (3) on one set of baffle (2) wherein, are provided with multiunit gas outlet (4) on another set of baffle (2), and multiunit air inlet (3) and multiunit gas outlet (4) department all are provided with shutter baffle (5), be provided with urea feed inlet (6) on barrel (1) wall.

2. The mixing chamber for an SCR aftertreatment device according to claim 1, characterized in that a first curved baffle (7) is mounted in the mixing chamber.

3. The mixing chamber for an SCR aftertreatment device of claim 2, wherein a second cowl (8) is mounted within the mixing chamber.

4. The mixing chamber for an SCR aftertreatment device according to claim 3, wherein the first curved baffle (7) and the second curved baffle (8) are fixedly mounted between the two groups of baffles (2) in a socket-and-spigot manner.

5. The mixing chamber for the SCR aftertreatment device according to claim 4, wherein the louver plates (5) on the air inlet (3) extend obliquely from opposite sides of the mixing chamber, and the louver plates (5) on the air outlet (4) extend obliquely into the mixing chamber.

6. The mixing chamber for the SCR aftertreatment device according to claim 5, wherein a urea nozzle holder (9) is fixedly installed at the urea feed port (6).