CN114797517A

CN114797517A - Gas mixing device

Info

Publication number: CN114797517A
Application number: CN202210575189.1A
Authority: CN
Inventors: 马凡华; 刘永振
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-07-29
Anticipated expiration: 2042-05-25
Also published as: CN114797517B

Abstract

The application relates to a gas mixing device, comprising: a delivery tube having a lumen, and first and second inlets communicating with the lumen; the first mixing module is arranged in the tube cavity and is positioned at the downstream of the first inlet and the second inlet, the first mixing module comprises a first corrugated plate, a gap is formed between the first corrugated plate and the wall of the tube cavity, first guide grooves for guiding mixed gas are formed between adjacent wave crests and adjacent wave troughs on the first corrugated plate, and the extending direction of the first guide grooves is perpendicular to the axial direction; the lumen is located to the second mixes the module and is located the low reaches of first entry and second entry, and the second mixes the module and includes the second buckled plate, all forms the second guide way that is used for the mist direction on the second buckled plate between adjacent crest and the adjacent trough, and the extending direction of second guide way is personally submitted the contained angle setting with the cross section of conveyer pipe. The gas mixing device can improve the uniformity of two gases after mixing.

Description

Gas mixing device

Technical Field

The invention relates to the technical field of gas mixing, in particular to a gas mixing device.

Background

At present, the mixing of gases is involved in many fields. For example, in the new energy automobile field, hydrogen is mixed with natural gas to achieve the transport of hydrogen. At present, some new energy automobiles use hydrogen fuel cells to provide electricity, and hydrogen is used as a main fuel of the hydrogen fuel cells, and the conveying link of the new energy automobiles is one of the bottlenecks which restrict the large-scale application of the hydrogen fuel cells. In the related art, in order to reduce the cost and realize the long-distance transportation, the conventional method is to mix the hydrogen into the natural gas in a certain proportion and transport the hydrogen by using the existing natural gas pipe network. The uniformity of the mixed hydrogen and natural gas has great influence on the stability of the conveying process, the subsequent hydrogen purification and the like, and therefore, how to improve the uniformity of the mixed hydrogen and natural gas is a problem to be solved urgently at present.

Disclosure of Invention

Based on the above, the invention provides a gas mixing device, which can improve the uniformity of two gases after mixing.

Gas mixing device for mixing a first gas and a second gas, comprising:

the conveying pipe is provided with a pipe cavity, and a first inlet and a second inlet which are communicated with the pipe cavity, the first inlet is used for introducing the first gas, the second inlet is used for introducing the second gas, and the flowing direction of mixed gas in the pipe cavity is parallel to the axial direction of the conveying pipe;

the first mixing module is arranged in the tube cavity and is positioned at the downstream of the first inlet and the second inlet, the first mixing module comprises a first corrugated plate, a gap is formed between the first corrugated plate and the wall of the tube cavity, first guide grooves for guiding the mixed gas are formed between adjacent wave crests and adjacent wave troughs on the first corrugated plate, and the extending direction of the first guide grooves is perpendicular to the axial direction;

the second mixes the module, locates the lumen and is located first entry with the low reaches of second entry, the second mixes the module and includes the second buckled plate, it is right all to form between adjacent crest and the adjacent trough on the second buckled plate the second guide way of mist direction, the extending direction of second guide way with the contained angle setting is personally submitted to the cross section of conveyer pipe.

In one embodiment, the second mixing module is arranged along the axial direction with the first mixing module, and the second mixing module is located downstream of the first mixing module.

In one embodiment, the second mixing modules alternate with the first mixing modules along the axial direction.

In one embodiment, the extending direction of the second guide groove forms an included angle with the cross section of the conveying pipe, and the extending direction of the second guide groove forms an included angle with the axial direction.

In one embodiment, the first mixing module comprises a plurality of first corrugated plates arranged along the axial direction, and at least some of the first corrugated plates extend in different directions.

In one embodiment, the first mixing module is at least partially in the axial direction, and a projection outer contour along the axial direction of an upstream one of the adjacent first corrugated plates does not exceed a projection outer contour along the axial direction of a downstream one of the adjacent first corrugated plates.

In one embodiment, the second mixing module comprises a plurality of second corrugated plates, the second corrugated plates are arranged along a direction perpendicular to the axial direction, and the extending directions of at least some of the second corrugated plates are different.

In one embodiment, the wave crests and the wave troughs of the first corrugated plate are in sharp angles; and the wave crests and the wave troughs of the second corrugated plates are all in a sharp-horn shape.

In one embodiment, the gas injection device further comprises a second gas injection member arranged in the tube cavity, the first inlet is located at one end of the conveying pipe, the second inlet is located on the side wall of the conveying pipe, a gas inlet of the second gas injection member is communicated with the second inlet, a gas outlet of the second gas injection member faces the first inlet, and the pressure of the second gas is greater than that of the first gas.

In one embodiment, the second gas injection member includes a main body portion and a plurality of branch portions connected to an outer circumferential surface of the main body portion, the main body portion and the branch portions are provided with the gas outlets, and the plurality of branch portions are distributed along a circumferential direction of the main body portion.

In the gas mixing device, the first mixing module and the second mixing module are arranged at the downstream of the first inlet and the downstream of the second inlet in the conveying pipe, so that the first gas introduced from the first inlet and the second gas introduced from the second inlet can pass through the first mixing module and the second mixing module. The extending direction of the first guide grooves formed by the first corrugated plates in the first mixing module is perpendicular to the axial direction of the conveying pipe, so that gas flows along the direction perpendicular to the axial direction of the conveying pipe when flowing through the first guide grooves, and therefore the gas is mixed in a plurality of areas in the direction, and the uniformity of the mixed gas in the plurality of areas in the direction is improved. Meanwhile, because the gap is formed between the first corrugated plate and the cavity wall of the cavity, the mixed gas can flow along the axial direction of the cavity through the gap. The extending direction of a second guide groove formed by a second corrugated plate in the second mixing module forms an included angle with the cross section of the conveying pipe, so that at least one part of component in the extending direction is along the axial direction of the conveying pipe, and gas can be at least mixed in a plurality of areas in the axial direction of the conveying pipe when flowing through the second guide groove, so that the uniformity of the plurality of areas in the axial direction of the conveying pipe is improved. Therefore, after the mixed gas flows through the first mixing module and the second mixing module, the mixing along the axial direction of the conveying pipe and along the direction perpendicular to the axial direction of the conveying pipe can be realized, and the mixing uniformity of the first gas and the second gas is improved to a greater extent.

Drawings

FIG. 1 is a schematic diagram of an overall structure of a gas mixing device according to an embodiment of the present application;

FIG. 2 is a schematic view of the gas mixing device of FIG. 1 at another angle;

FIG. 3 is a cross-sectional view (from one side) of the gas mixing device of FIG. 1;

FIG. 4 is a cross-sectional view of the gas mixing device of FIG. 1 (cut-away position located upstream of the first mixing module);

FIG. 5 is a cross-sectional view of the gas mixing device of FIG. 1 (cut-away position located upstream of the second mixing module);

fig. 6 is a schematic structural view of a first corrugation plate of a first hybrid module according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural view of the first corrugation plate of FIG. 6;

fig. 8 is a schematic structural view of a second corrugation plate of a second hybrid module according to an embodiment of the present application;

FIG. 9 is a schematic structural view of the second corrugation plate of FIG. 8;

FIG. 10 is a schematic structural diagram of a first hybrid module according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a second hybrid module according to an embodiment of the present application.

Reference numerals:

a delivery pipe 10, a pipe cavity 11, a first inlet 12 and a second inlet 13;

a first mixing module 20, a first corrugation plate 21, a first corrugation plate wave crest 211, a first corrugation plate wave trough 212, a first guide groove 213, a first corrugation plate 214, a second first corrugation plate 215, and a third first corrugation plate 216;

a second hybrid module 30, a second corrugation plate 31, second corrugation plate peaks 311, second corrugation plate valleys 312, second guide grooves 313, a first second corrugation plate 314, a second corrugation plate 315, a third second corrugation plate 316;

the second gas injection member 40, the main body part 41, the first gas outlet 411, the branch part 42, the second gas outlet 421, and the connection pipe 43.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Fig. 1 is a schematic view showing the overall structure of a gas mixing device in an embodiment of the present application; FIG. 2 is a schematic view of the gas mixing device of FIG. 1 at another angle; FIG. 3 shows a cross-sectional view (from one side) of the gas mixing device of FIG. 1; FIG. 4 shows a cross-sectional view of the gas mixing device of FIG. 1 (cut-away position upstream of the first mixing module); FIG. 5 shows a cross-sectional view of the gas mixing device of FIG. 1 (cut-away position upstream of the second mixing module); fig. 6 shows a schematic structural view of a first corrugation plate of a first hybrid module in an embodiment of the present application; FIG. 7 shows a schematic structural view of the first corrugation plate of FIG. 6; fig. 8 shows a schematic structural view of a second corrugation plate of a second hybrid module in an embodiment of the present application; fig. 9 shows a schematic view of the structure of the second corrugation plate of fig. 8.

Referring to fig. 1 to 3, a gas mixing device according to an embodiment of the present invention is used for mixing a first gas and a second gas. In this application, the first gas is natural gas and the second gas is hydrogen. Of course, other gases than the two gases described above may be mixed by using the gas mixing device.

The gas mixing apparatus according to an embodiment of the present invention includes a delivery pipe 10, a first mixing module 20, and a second mixing module 30. The conveying pipe 10 is provided with a pipe cavity 11, and a first inlet 12 and a second inlet 13 which are communicated with the pipe cavity 11, the first inlet 12 is used for introducing first gas, the second inlet 13 is used for introducing second gas, and the flowing direction of mixed gas in the pipe cavity 11 is parallel to the axial direction of the conveying pipe 10. The first mixing module 20 and the second mixing module 30 are disposed in the lumen 11 and are located downstream of the first inlet 12 and the second inlet 13. Referring to fig. 3, 4 and 6, the first mixing module 20 includes a first corrugated plate 21, a gap is formed between the first corrugated plate 21 and the wall of the lumen 11, first guide grooves 213 for guiding the mixed gas are formed between adjacent peaks and adjacent troughs of the first corrugated plate 21, and the first guide grooves 213 extend perpendicular to the axial direction of the conveying pipe 10. Referring to fig. 3, 5 and 8, the second mixing module 30 includes a second corrugated plate 31, second guide grooves 313 for guiding the mixed gas are formed between adjacent peaks and adjacent troughs of the second corrugated plate 31, and the extending direction of the second guide grooves 313 forms an included angle with the cross section of the conveying pipe 10.

In the above embodiment, the first mixing module 20 and the second mixing module 30 are disposed downstream of the first inlet 12 and the second inlet 13 of the conveying pipe 10, so that the mixed gas formed by the first gas introduced from the first inlet 12 and the second gas introduced from the second inlet 13 will pass through the first mixing module 20 and the second mixing module 30. The first guide grooves 213 formed by the first corrugation plates 21 in the first mixing module 20 extend perpendicular to the axial direction of the conveying pipe 10, so that the gas flows along the direction perpendicular to the axial direction of the conveying pipe 10 when flowing through the first guide grooves 213, and thus the gas is mixed in a plurality of regions in the direction, and the uniformity of the plurality of regions in the direction is improved. Meanwhile, since the first corrugation plate 21 has a gap with the wall of the lumen 11, the mixed gas can flow along the axial direction of the lumen 11 through the gap. The extending direction of the second guide groove 313 formed by the second corrugated plate 31 in the second mixing module 30 is arranged at an angle with the cross section of the conveying pipe 10, so that at least a part of the extending direction is along the axial direction of the conveying pipe 10, and when the gas flows through the second guide groove 313, the gas can be mixed at least in a plurality of areas in the axial direction of the conveying pipe 10, and the uniformity of the plurality of areas in the axial direction of the conveying pipe 10 is improved. Therefore, after the mixed gas flows through the first mixing module 20 and the second mixing module 30, mixing along the axial direction of the conveying pipe 10 and along the direction perpendicular to the axial direction of the conveying pipe 10 can be achieved, so that the uniformity of mixing of the first gas and the second gas is greatly improved.

Referring to fig. 1 and 4, in the embodiment shown in the drawings, the conveying pipe 10 is a circular pipe having a circular cross section, and a direction perpendicular to the axial direction is a radial direction. Of course, in other embodiments, the delivery tube 10 may have other shapes, and the cross section may be polygonal, such as square, pentagon, etc., or may be elliptical. The embodiments described below will be described based on the circular tube shown in the drawings.

Referring to fig. 3 and 4, in the embodiment shown in the drawings, the axial direction of the delivery pipe 10 is represented by the direction X ' X or XX ', wherein the direction X ' X is the flowing direction of the mixed gas in the pipe cavity 11. The X ' X direction, the Y ' Y direction and the Z ' Z direction are vertical pairwise, and the plane where the Y ' Y direction and the Z ' Z direction are located is taken as the cross section of the conveying pipe 10. Referring to fig. 6 and 8, the extending direction of the first guide groove 213 is a direction, and the extending direction of the second guide groove 313 is b direction. It should be noted that the above-mentioned mixed gas flowing along the axial direction of the conveying pipe 10 is from a macroscopic view, and from a microscopic view, the mixed gas will also flow along the radial direction of the conveying pipe 10.

Referring to fig. 4, 6 and 7, specifically, the first corrugation plate 21 has a plurality of first corrugation plate wave crests 211 and a plurality of first corrugation plate wave troughs 212. First guide grooves 213 for guiding the mixed gas are formed between the peaks 211 of the adjacent first corrugation plates, and first guide grooves 213 for guiding the mixed gas are also formed between the valleys 212 of the adjacent first corrugation plates. When the mixed gas flows to the first corrugation plate 21, the first guide grooves 213 guide the mixed gas to tend to flow along the extending direction of the first guide grooves 213, so that the mixed gas has higher uniformity in a plurality of regions from the inside to the outside in the radial direction of the conveying pipe 10, and the mixed gas is not concentrated in the central region or the edge region. Simultaneously, because the surface of first buckled plate 21 is the corrugate of unsmooth undulation, the mist when flowing to first buckled plate 21 will collide with first buckled plate 21, is favorable to the mist to form the torrent, distributes more dispersedly to improve its distribution uniformity.

Referring to fig. 5, 8 and 9, similarly, the second corrugation plate 31 has a plurality of second corrugation plate wave crests 311 and a plurality of second corrugation plate wave troughs 312. Second guide grooves 313 for guiding the mixed gas are formed between the peaks 311 of the adjacent second corrugation plates, and second guide grooves 313 for guiding the mixed gas are also formed between the valleys 312 of the adjacent second corrugation plates. When the mixed gas flows to the second corrugation plate 31, the second guide grooves 313 guide the mixed gas to tend to flow along the extending direction of the second guide grooves 313, so that the mixed gas can be more uniform at least in a plurality of regions in the axial direction of the conveying pipe 10. Simultaneously, because the surface of second buckled plate 31 is the corrugate of unsmooth undulation, the mist when flowing to second buckled plate 31 will collide with second buckled plate 31, is favorable to the mist to form the torrent, distributes more dispersedly to improve its distribution uniformity.

Referring to fig. 3, in some embodiments, the second mixing module 30 is arranged with the first mixing module 20 along the axial direction of the conveying pipe 10, and the second mixing module 30 is located downstream of the first mixing module 20. As described above, the mixed gas flows axially along the duct 10 from a macroscopic point of view, and therefore, the gas flows axially in the upstream area of the second mixing block 30 and the first mixing block 20. According to the foregoing analysis, the first mixing module 20 can improve the uniformity of the mixed gas in the radial direction of the conveying pipe 10, and the second mixing module 30 can improve the uniformity of the mixed gas in at least the axial direction of the conveying pipe 10. In this embodiment, when the second mixing module 30 is located downstream of the first mixing module 20, the mixed gas will first flow through the first mixing module 20, and the first corrugated plate 21 can convert the gas that originally flows along the axial direction of the conveying pipe 10 into a gas that flows along the radial direction of the conveying pipe 10. When the mixed gas flows through the second mixing module 30, the second corrugation plate 31 converts the gas flow direction along the axial direction of the conveying pipe 10. So set up and to make mist through twice flow direction conversion when two mixing modules of flowing through, it can be better to mix the effect, is favorable to further improving the homogeneity.

Of course, in other embodiments, the second mixing module 30 may be located upstream of the first mixing module 20.

Preferably, in some embodiments, the second mixing modules 30 are alternately arranged with the first mixing modules 20 in the axial direction of the conveying pipe 10. For example, the first mixing module 20 may be additionally disposed at the downstream of the second mixing module 30, so that the gas is converted in flow direction three times when passing through the three mixing modules, and the mixing effect is better, which is beneficial to further improving the uniformity.

Referring to fig. 3, 5 and 8, in some embodiments, the extending direction of the second guide groove 313 is disposed at an angle to the cross section of the conveying pipe 10, and the extending direction of the second guide groove 313 is disposed at an angle to the axial direction of the conveying pipe 10. Specifically, the second guide groove 313 extends at an angle to both the radial and axial directions of the delivery pipe 10. Thus, the second guide groove 313 extends in a direction having a part of the axial direction of the feed pipe 10 and a part of the radial direction of the feed pipe 10. When the gas flows through the second guide groove 313, the uniformity of the gas along the axial direction of the conveying pipe 10 can be improved, the uniformity of the gas along the radial direction of the conveying pipe 10 can be improved, and the mixing effect is better.

Of course, in other embodiments, the extending direction of the second guiding groove 313 may be 90 degrees to the cross section of the conveying pipe 10, that is, the extending direction of the second guiding groove 313 is parallel to the axial direction of the conveying pipe 10. At this time, the uniformity of the gas in the axial direction of the conveying pipe 10 is improved only by the second corrugation plates 31.

FIG. 10 shows a schematic structural diagram of a first hybrid module in an embodiment of the present application; fig. 11 shows a schematic structural diagram of a second hybrid module in an embodiment of the present application.

Referring to fig. 3, 4 and 10, in some embodiments, the first mixing module 20 includes a plurality of first corrugation plates 21 arranged along the axial direction of the conveying pipe 10, and at least some of the first corrugation plates 21 extend in different directions. When a plurality of first corrugation plates 21 are provided, the gas reaches each first corrugation plate 21 to be dispersed, thereby improving uniformity in a radial direction of the feed pipe 10, and the mixing effect can be improved. At least some of the first corrugation plates 21 extend in different directions, but all extend in a direction perpendicular to the axial direction of the transport pipe 10. When the gas reaches these first corrugation plates 21, mixing in a plurality of directions in the cross section can be achieved, and the mixing effect is better. Preferably, the extending direction of any two adjacent first corrugated plates 21 is vertical, and at this time, when the gas flows at two adjacent first corrugated plates 21, the flowing direction will be continuously switched by 90 degrees, which is beneficial to further improving the mixing uniformity.

With continued reference to fig. 3, 4 and 10, preferably, in some embodiments, the first mixing module 20 at least partially extends in the axial direction of the conveying pipe 10, and a projection profile of an upstream one of the adjacent first corrugated plates 21 in the axial direction of the conveying pipe 10 does not exceed a projection profile of a downstream one in the axial direction of the conveying pipe 10. Specifically, the first mixing module 20 is at least partially in the axial direction of the conveying pipe 10, and of the adjacent first corrugation plates 21, the radial dimension of the first corrugation plate 21 located upstream is not larger than the radial dimension of the first corrugation plate 21 located downstream. For example, the first corrugation plate 214 is located upstream of the second corrugation plate 215 in the three

first corrugation plates

214, 215 and 216 which are adjacently arranged, and the second corrugation plate 215 is located upstream of the third corrugation plate 216 in the three

first corrugation plates

214, 215 shown in the figure. The radial dimension of the first corrugation plate 214 is not greater than the radial dimension of the second corrugation plate 215, and the radial dimension of the second corrugation plate 215 is not greater than the radial dimension of the third corrugation plate 216.

The position of the three corrugated plates protruding toward the upstream direction is used as the wave crests 211 of the first corrugated plate, and the position of the three corrugated plates protruding toward the downstream direction is used as the wave troughs 212 of the first corrugated plate. The gas first flows to the upstream side of the first corrugation plate 214, flows in the first guide grooves 213 formed between the adjacent corrugation peaks 211 of the first corrugation plate, and flows downstream along the axial direction of the conveying pipe 10 to the downstream of the first corrugation plate 214, i.e. upstream of the second corrugation plate 215 when flowing to the edge position of the first corrugation plate 214. Thereafter, the gas flows in the first guide grooves 213 formed between the peaks 211 of the adjacent first corrugation plates 215 of the second first corrugation plate 215 and also flows in the first guide grooves 213 formed between the valleys 212 of the adjacent first corrugation plates 214 of the first corrugation plate. Similarly, when flowing to the edge of the second corrugated plate 215, it will flow downstream in the axial direction of the conveying pipe 10 to the downstream of the second corrugated plate 215, i.e. upstream of the third corrugated plate 216. The gas will then flow in the first guide channels 213 formed between adjacent first corrugation ridges 211 of the third first corrugation plate 216 and in the first guide channels 213 formed between adjacent first corrugation valleys 212 of the second first corrugation plate 215.

In the above-mentioned flowing process, since the radial dimension of the first corrugation plate 21 located at the upstream is not larger than that of the first corrugation plate 21 located at the downstream, when the gas flows to the edge of each corrugation plate, a flow path of a 'lower step' is formed to reach the next corrugation plate. So set up and to have better water conservancy diversion effect between adjacent buckled plate, make gaseous change in reaching next buckled plate department, be favorable to realizing water conservancy diversion and mixing many times to further improve and mix the degree of consistency.

In the embodiment shown in the drawings, the radial dimension of the first corrugation plates 21 in the first mixing module 20 at the center position in the axial direction of the transport pipe 10 is the largest, the radial dimension of each first corrugation plate 21 located upstream of the first corrugation plate 21 is gradually increased in the flow direction, and the radial dimension of each first corrugation plate 21 located downstream of the first corrugation plate 21 is gradually decreased in the flow direction. At this time, it is necessary to make the radial dimension of the first corrugation plate 21, which is located at the center in the axial direction of the conveying pipe 10, smaller than the radial dimension of the lumen 11, that is, to make a gap between the first corrugation plate 21 and the wall of the lumen 11, so that the gas can continue to flow downstream through the gap when flowing to the edge of the first corrugation plate 21 in the first guide groove 213 of the first corrugation plate 21. The shape of the first corrugation plate 21 matches the shape of the lumen 11, i.e. the projected outer contour of the first corrugation plate 21 in the axial direction of the conveying pipe 10 is approximately circular. Preferably, the radial dimension of the first corrugation plate 21 is 90% of the radial dimension of the tube cavity 11, at this time, the gas can flow smoothly toward the downstream through the gap, and most of the gas can reach the gap after being guided by the first guide grooves 213 of the first corrugation plates 21, rather than directly flow toward the downstream through the gap without being guided, that is, the gas has both the conveying efficiency and the mixing effect.

In other embodiments, the radial dimension of any two adjacent first corrugation plates 21, the first corrugation plate 21 located at the upstream is not larger than the radial dimension of the first corrugation plate 21 located at the downstream, that is, the radial dimension of all the first corrugation plates 21 is gradually increased in the flowing direction. At this time, the radial dimension of the most downstream one of the first corrugation plates 21 is smaller than the radial dimension of the lumen 11, and the gas will form a "lower step" flow path between all adjacent first corrugation plates 21.

Referring to fig. 3, 5 and 11, preferably, in some embodiments, the second mixing module 30 includes a plurality of second corrugation plates 31, the plurality of second corrugation plates 31 are arranged in a direction perpendicular to the axial direction of the conveying pipe 10, and at least some of the second corrugation plates 31 extend in different directions. For example, the second mixing module 30 includes a first second corrugation plate 314, a second corrugation plate 315, and a third second corrugation plate 316 … … when a plurality of second corrugation plates 31 are provided, the gas can flow between any two second corrugation plates 31 to be mixed, and the uniformity is better. Preferably, the entire second mixing module 30 has a circular outer contour in projection along the axial direction of the conveying pipe 10, and its radial dimension is equal to the radial dimension of the lumen 11, i.e. there is no gap between the second mixing module 30 and the lumen 11. In this way, part of the gas can flow between the adjacent second corrugated plates 31, and part of the gas can flow between the second corrugated plates 31 and the wall of the lumen 11. No matter which mode, all flow through second guide way 313, the homoenergetic leads to make direction and mix more thoroughly, the homogeneity is better. Preferably, the extending direction of any two adjacent second corrugation plates 31 is vertical, and the mixing effect is better.

Referring to fig. 7, in some embodiments, the peaks and valleys of the first corrugation plate 21 are all in a sharp angle shape. Specifically, the first corrugation plate wave crests 211 and the first corrugation plate wave troughs 212 are all sharp-angled. Thus, when gas flows to the wave crests 211 and wave troughs 212 of the first corrugated plate, the gas can be dispersed by better cutting, and the mixing effect is better.

Referring to fig. 9, in some embodiments, the peaks and valleys of the second corrugation plate 31 are all sharp-angled. Specifically, the peaks 311 and the troughs 312 of the second corrugation plate are both sharp-angled. Thus, when the gas flows to the wave crests 311 and wave troughs 312 of the second corrugated plate, the gas can be dispersed by better cutting, and the mixing effect is better.

Referring to fig. 7 and 9, preferably, the peaks 211 and the troughs 212 of the first corrugation plate are all sharp-angled, and the peaks 311 and the troughs 312 of the second corrugation plate are all sharp-angled.

Referring to fig. 4 and 7, preferably, the included angle α between the projected profiles of the two groove walls of the first guide groove 213 along the Y' Y direction is 60 degrees. At this time, the number of the first guide grooves 213 is large, the mixing effect is good, the pressure drop is small when the gas flows, and the flow efficiency is high.

Referring to fig. 9, similarly, the angle α between the projections of the two groove walls of the second guide groove 313 along the X' X direction is 60 degrees. At this time, the number of the second guide grooves 313 is large, the mixing effect is good, the pressure drop is small when the gas flows, and the flow efficiency is high.

Referring to fig. 1 to 3, in some embodiments, the gas supply device further includes a second gas injection member 40 disposed in the tube cavity 11, the first inlet 12 is located at one end of the conveying pipe 10, the second inlet 13 is located on a side wall of the conveying pipe 10, an inlet of the second gas injection member 40 is communicated with the second inlet 13, an outlet of the second gas injection member 40 faces the first inlet 12, and a pressure of the second gas is greater than a pressure of the first gas. Specifically, the first gas, which is the main gas, flows into the lumen 11 from the first inlet 12. The second gas is a follow-up gas, flows into the second gas injection member 40 from the second inlet 13, and flows into the lumen 11 through the gas outlet of the second gas injection member 40. The mixed gas finally flows out from the other end of the delivery pipe 10. The gas outlet of the second gas injection member 40 is located on the side thereof close to the upstream side so that the gas can be injected through the gas outlet toward the first inlet 12. Thus, the first gas and the second gas are injected into the tube cavity 11 in opposite directions, and the two gases are opposite to each other, so that the mixing effect is better. Since the pressure of the second gas is greater than that of the first gas, the first gas can be inhibited from flowing into the second gas injection member 40 through the gas outlet of the second gas injection member 40.

With continued reference to fig. 1 to 3, in some embodiments, the second gas injection member 40 includes a main body 41 and a plurality of branch portions 42 connected to an outer circumferential surface of the main body 41, the main body 41 and the branch portions 42 are respectively provided with gas outlets, and the plurality of branch portions 42 are distributed along a circumferential direction of the main body 41. Specifically, each branch portion 42 extends outward in the radial direction of the delivery pipe 10 from the outer peripheral surface of the main body portion 41. The main body 41 and the plurality of branch portions 42 are hollow, and the lumen of each branch portion 42 communicates with the lumen of the main body 41. One end of the connection pipe 43 is connected to the second inlet 13, and the other end is connected to the inner cavity of the body 41. The main body 41 has a plurality of first air outlets 411 on its upstream end face, and the branch portion 42 has a plurality of second air outlets 421 on its upstream side wall. The second gas flows into the connecting pipe 43 through the second inlet 13, and then flows into the inner cavity of the main body 41, wherein a part of the second gas is ejected towards the first inlet 12 through the first gas outlet 411, and a part of the second gas is ejected towards the first inlet 12 through the second gas outlet 421. Through first gas outlet 411 and the cooperation of second gas outlet 421 second gas of spouting, can make the second gas radially spout the position more even at lumen 11 to it is more even to distribute, and then improves the homogeneity after first gas and the second gas mixture. Preferably, the plurality of second air outlets 421 are arranged at intervals along the radial direction of the tube cavity 11, which is beneficial to further improving the radial uniformity of the first air in the tube cavity 11.

Preferably, the radial dimension of first air outlet 411 is smaller than the radial dimension of second air outlet 421. Like a water pipe, in this configuration, the pressure is greater at a position closer to the air supply, that is, the pressure at the first air outlet 411 is greater. In this embodiment, if the radial dimension of the first gas outlet 411 is made smaller, the amount of the gas ejected from the second gas outlet 421 can be increased, and the second gas can be ejected more uniformly along the radial direction of the tube cavity 11. Specifically, in some embodiments, the radial dimension of first air outlet 411 is 80% of the radial dimension of second air outlet 421. At this time, the second gas is more uniformly distributed in the radial direction of the lumen 11 after being ejected.

The specific dimensions of the corrugated plates and the gas flow rate are given below in several examples.

In some embodiments, the first gas is natural gas and the second gas is hydrogen. The volume ratio of the hydrogen after mixing is in the range of 0-20%, and the speed of the hydrogen inlet (the second inlet 13) is 5 times of the speed of the natural gas inlet (the first inlet 12). The diameter of the lumen 11 is 400 mm. The inner diameter of the main body 41 was 160mm, the inner diameter of the branch portion 42 was 20mm, and 6 branch portions 42 were provided in total. The diameter of the first air outlet 411 is 8mm, and the diameter of the second air outlet 421 is 10 mm. The thickness of the first corrugation plate 21 and the second corrugation plate 31 is 0.2mm, and the number of the first corrugation plate and the second corrugation plate is 7-16. When the number of the two is 12, the height between the wave crest and the wave trough of the two is 34 mm.

Of course, in other embodiments, the hydrogen volume ratio after mixing may be higher, and the hydrogen volume ratio may range from 0 to 50%, so that a better blending effect may be obtained.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A gas mixing apparatus for mixing a first gas with a second gas, comprising:

2. The gas mixing apparatus of claim 1, wherein the second mixing module is arranged with the first mixing module along the axial direction, and the second mixing module is located downstream of the first mixing module.

3. The gas mixing device of claim 2, wherein the second mixing modules alternate with the first mixing modules along the axial direction.

4. The gas mixing device according to claim 1, wherein the second guide groove extends at an angle to the cross-section of the conveying pipe, and the second guide groove extends at an angle to the axial direction.

5. The gas mixing device according to any one of claims 1 to 4, wherein the first mixing module comprises a plurality of first corrugated plates arranged along the axial direction, and at least some of the first corrugated plates extend in different directions.

6. A gas mixing arrangement according to claim 5, characterised in that the first mixing module is at least partly within the axial direction, adjacent first corrugated plates having a projected outer contour in the axial direction upstream which does not exceed a projected outer contour in the axial direction downstream.

7. The gas mixing device according to any one of claims 1 to 4, wherein the second mixing module comprises a plurality of second corrugated plates, the plurality of second corrugated plates are arranged along a direction perpendicular to the axial direction, and at least some of the second corrugated plates have different extending directions.

8. A gas mixing device according to any one of claims 1 to 4, wherein the peaks and troughs of the first corrugated plate are each pointed and the peaks and troughs of the second corrugated plate are each pointed.

9. The gas mixing device of claim 1, further comprising a second gas injection member disposed in the lumen, wherein the first inlet is located at one end of the delivery tube, the second inlet is located on a side wall of the delivery tube, an inlet of the second gas injection member is communicated with the second inlet, an outlet of the second gas injection member faces the first inlet, and a pressure of the second gas is greater than a pressure of the first gas.

10. The gas mixing device according to claim 9, wherein the second gas injection member includes a main body portion and a plurality of branch portions connected to an outer peripheral surface of the main body portion, the main body portion and the branch portions each having the gas outlet provided thereon, the plurality of branch portions being distributed along a circumferential direction of the main body portion.