CN210752468U

CN210752468U - Mixing device

Info

Publication number: CN210752468U
Application number: CN201921674048.5U
Authority: CN
Inventors: 廉宏伟; 陈龙; 王耀明
Original assignee: Ecosail Energy Technology Jiangsu Co ltd
Current assignee: Ecosail Energy Technology Jiangsu Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-16
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a mixer, include: the flue gas pipeline is arranged in the internal combustion engine and comprises a flue gas inlet and a flue gas outlet; the spiral device is arranged at one end, close to the flue gas inlet, in the flue gas pipeline and forms a spiral channel with the inner wall of the flue gas pipeline; the baffle is arranged at one end, close to a smoke outlet, in the smoke pipeline and comprises a fixing ring and a plurality of groups of baffle plates, the plurality of groups of baffle plates are arranged in parallel at intervals along a first direction perpendicular to the flow direction of smoke, and a folding channel is formed between the two adjacent groups of baffle plates. The flue gas enters the inner cavity of the flue gas pipeline from the flue gas inlet and firstly passes through the spiral channel, and the flowing length of the flue gas in the spiral channel is prolonged, so that the retention time of the flue gas is prolonged; then, the flue gas passes through a plurality of folding passageways, and a plurality of baffling passageways make the mixture of flue gas and reductant more even and make the time that the flue gas stayed further lengthen, from this, need not longer flue distance can realize comparatively ideal denitration effect.

Description

Mixing device

Technical Field

The utility model relates to a technical field is handled to the flue gas, especially relates to a mixer.

Background

The smoke emitted by the internal combustion engine contains a large amount of nitrogen oxides (NOx) when the internal combustion engine works, which not only stimulates the respiratory system of people and damages animals and plants, but also is one of the main substances causing acid rain and photochemical reaction to destroy the ozone layer and further cause greenhouse effect. In recent years, with the increasing perfection of national environmental awareness and environmental regulations, flue gas denitration technology has been adopted for NOx emission sources to realize NOx emission reduction. The flue gas denitration technology needs a matched denitration device, and the denitration device is used for mixing the reducing agent with the flue gas, so that denitration is realized. However, in the denitration of the internal combustion engine, the reducing agent injected into the flue needs a longer distance to be uniformly mixed with the flue gas due to the small pipe diameter of the tail gas flue, the high flow rate of the flue gas and the like. Therefore, when a denitration device is arranged in a place with limited site, the denitration efficiency is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a need not longer flue distance can realize the blender of comparatively ideal denitration effect.

In order to solve the technical problem, one technical solution adopted by the present invention is to provide a mixer, a flue gas pipeline is arranged in an internal combustion engine, and comprises a flue gas inlet and a flue gas outlet; the spiral device is arranged at one end, close to the flue gas inlet, in the flue gas pipeline and forms a spiral channel with the inner wall of the flue gas pipeline; the baffle is arranged at one end, close to the smoke outlet, in the smoke pipeline and comprises a fixing ring and a plurality of groups of baffle plates, the plurality of groups of baffle plates are arranged in parallel at intervals along a first direction perpendicular to the flow direction of smoke, and a folding channel is formed between every two adjacent groups of baffle plates.

The utility model discloses a concrete embodiment still includes the divertor, the divertor sets up the spiral organ with between the divertor, the divertor includes the net board and sets up the deflector at net board both ends, two distance between the deflector diminishes along the flue gas flow direction gradually, evenly be provided with the mesh on the net board.

In a particular embodiment of the present invention, the baffles are provided in plurality, and are arranged side by side along the direction of flow of the flue gas, and each of the baffles the folded channels are staggered and communicate with each other.

In an embodiment of the present invention, each set of the baffle plates comprises a first baffle plate and a second baffle plate, one end of the first baffle plate is connected to one end of the second baffle plate, the first baffle plate and the central axis of the fixing ring are in a first included angle, the second baffle plate and the central axis of the fixing ring are in a second included angle, and the first included angle and the second included angle are complementary.

In a specific embodiment of the present invention, the first included angle is 30 °, and the second included angle is 150 °.

In a specific embodiment of the present invention, each set of the baffles is wavy, and a curved channel is formed between two adjacent sets of the baffles.

In a particular embodiment of the invention, the central axes of the auger, the deflector and the deflector coincide with the central axis of the flue gas duct.

By applying the technical scheme of the embodiment, the flue gas enters the inner cavity of the flue gas pipeline from the flue gas inlet, and firstly passes through the spiral device and the inner wall of the flue gas pipeline to form the spiral channel, so that the flowing length of the flue gas in the spiral channel is prolonged, the retention time of the flue gas is prolonged, and the reducing agent and the flue gas are mixed more fully; then, the flue gas flows in a plurality of folding passageways through the baffler, and a plurality of baffling passageways make the mixture of flue gas and reductant more even and make the flue gas dwell time further lengthen, from this, need not longer flue distance can realize comparatively ideal denitration effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the mixer of the present invention;

FIG. 2 is a schematic cross-sectional view of the flow director of the mixer of the present invention;

figure 3 is a schematic cross-sectional view of the baffle of the mixer of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the mixer embodiment of the present invention comprises: flue gas duct 1, spiral 2 and deflector 4. The flue gas duct 1 is arranged in an internal combustion engine and comprises a flue gas inlet 11 and a flue gas outlet 12. And the screw 2 is arranged at one end, close to the flue gas inlet 11, in the flue gas pipeline 1 and forms a spiral channel with the inner wall of the flue gas pipeline 1. The baffle 4 is arranged at one end of the flue gas pipeline 1 close to the flue gas outlet 12 and comprises a fixing ring 41 and a plurality of groups of baffle plates 42, the groups of baffle plates 42 are arranged in parallel at intervals along a first direction perpendicular to the flow direction of the flue gas, and a folding channel is formed between two adjacent groups of baffle plates 42.

By applying the technical scheme of the embodiment, the flue gas enters the inner cavity of the flue gas pipeline 1 from the flue gas inlet 11, and firstly passes through the spiral device 2 and the inner wall of the flue gas pipeline 1 to form a spiral channel, so that the flowing length of the flue gas in the spiral channel is prolonged, the residence time of the flue gas is prolonged, and the reducing agent and the flue gas are mixed more fully; then, the flue gas flows in a plurality of folding passageways through baffle 4, and a plurality of baffling passageways make the mixture of flue gas and reductant more even and make the flue gas dwell time further lengthen, from this, need not longer flue distance can realize comparatively ideal denitration effect.

In an embodiment, the mixer further includes a flow director 3, the flow director 3 is disposed between the screw 2 and the flow deflector 4, the flow director 3 includes a grid plate 32 and guide plates 31 disposed at two ends of the grid plate 32, a distance between the two guide plates 31 gradually decreases along a flow direction of the flue gas, mesh holes 321 are uniformly disposed on the grid plate 32, and the mesh holes 321 may be circular, square, diamond, or the like.

In one embodiment, there are a plurality of baffles 4, which are arranged side by side along the flow direction of the flue gas, and the folded channels of each baffle 4 are staggered and communicate with each other.

Specifically, the number of the deflectors 4 is three.

In an embodiment, each set of baffles 42 includes a first baffle 421 and a second baffle 422, one end of the first baffle 421 is connected to one end of the second baffle 422, the central axes of the first baffle 421 and the fixing ring 41 form a first included angle, the central axes of the second baffle 422 and the fixing ring 41 form a second included angle, and the first included angle and the second included angle are complementary.

Specifically, the first included angle may be 30 °, and the second included angle may be 150 °.

In another embodiment, each set of baffles 42 is undulating in shape, with a tortuous path formed between adjacent sets of baffles 42.

In one embodiment, the central axes of the auger 2, deflector 3 and deflector 4 coincide with the central axis of the flue gas duct 1. Therefore, the mixing effect of the flue gas and the reducing agent is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A mixer, comprising:

the flue gas pipeline is arranged in the internal combustion engine and comprises a flue gas inlet and a flue gas outlet;

the spiral device is arranged at one end, close to the flue gas inlet, in the flue gas pipeline and forms a spiral channel with the inner wall of the flue gas pipeline;

the baffle is arranged at one end, close to the smoke outlet, in the smoke pipeline and comprises a fixing ring and a plurality of groups of baffle plates, the plurality of groups of baffle plates are arranged in parallel at intervals along a first direction perpendicular to the flow direction of smoke, and a folding channel is formed between every two adjacent groups of baffle plates.

2. The mixer of claim 1, further comprising a flow deflector, wherein the flow deflector is arranged between the screw and the flow deflector, the flow deflector comprises a grid plate and guide plates arranged at two ends of the grid plate, the distance between the two guide plates is gradually reduced along the flow direction of the flue gas, and the grid plate is uniformly provided with meshes.

3. The mixer of claim 1, wherein said plurality of baffles are arranged side by side along the direction of flow of the flue gas, and said folded passages of each of said baffles are staggered and in communication with each other.

4. The mixer of claim 1 wherein each set of baffles comprises a first baffle plate and a second baffle plate, one end of the first baffle plate and one end of the second baffle plate are connected, the first baffle plate and the central axis of the stationary ring are at a first included angle, the second baffle plate and the central axis of the stationary ring are at a second included angle, the first included angle and the second included angle are complementary.

5. The mixer of claim 4, wherein the first included angle is 30 ° and the second included angle is 150 °.

6. The mixer of claim 1 wherein each set of baffles is undulating in shape, with a tortuous path formed between adjacent sets of baffles.

7. The mixer of claim 2 wherein the central axes of the auger, deflector and deflector coincide with the central axis of the flue gas duct.