CN114797517B

CN114797517B - Gas mixing device

Info

Publication number: CN114797517B
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: 2023-06-06
Anticipated expiration: 2042-05-25
Also published as: CN114797517A

Abstract

The application relates to a gas mixing device, comprising: a delivery tube having a lumen, and first and second inlets in communication with the lumen; the first mixing module is arranged in the lumen and 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 lumen wall of the lumen, a first guide groove for guiding the mixed gas is formed between each adjacent wave crest and each adjacent wave trough on the first corrugated plate, and the extending direction of the first guide groove is perpendicular to the axial direction; the second mixes the module and locates the lumen and be 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 direction to the mixed gas between adjacent crest and the adjacent trough on the second buckled plate, and the extending direction of second guide way personally submits the contained angle setting with the transversal of conveyer pipe. The gas mixing device can improve the uniformity of the two gases after being mixed.

Description

Gas mixing device

Technical Field

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

Background

Currently, mixing of gases is involved in many areas. For example, in the field of new energy automobiles, hydrogen is mixed with natural gas to achieve delivery of hydrogen. At present, some new energy automobiles begin to use hydrogen fuel cells to provide power, hydrogen is used as main fuel of the hydrogen fuel cells, and the transportation link of the hydrogen fuel cells is one of the bottlenecks restricting the large-scale application of the hydrogen fuel cells. In the related art, in order to reduce the cost and realize remote transportation, the conventional method is to mix hydrogen into 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 a great influence on the stability of the conveying process, the subsequent purification of hydrogen and the like, so that how to improve the uniformity of the mixing of the hydrogen and the natural gas is a problem to be solved 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 being mixed.

A gas mixing device for mixing a first gas with a second gas, comprising:

the conveying pipe is provided with a pipe cavity, a first inlet and a second inlet, wherein the first inlet and the second inlet 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 the mixed gas in the pipe cavity is parallel to the axial direction of the conveying pipe;

the first mixing module is arranged in the lumen and 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 lumen wall of the lumen, 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 be located first entry with the low reaches of second entry, the second mixes the module and includes the second buckled plate, all form between adjacent crest and the adjacent trough on the second buckled plate and be used for right the second guide way of mixed gas direction, the extending direction of second guide way with the transversal contained angle setting of personally submitting 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 and the first mixing modules are alternately arranged along the axial direction.

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

In one embodiment, the first mixing module includes a plurality of the first corrugated plates arranged along the axial direction, and at least a portion of the first corrugated plates have different extending directions.

In one embodiment, the first mixing module is arranged in at least a part of the area in the axial direction, and in the adjacent first corrugated plates, the projection outline of one upstream along the axial direction does not exceed the projection outline of one downstream along the axial direction.

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

In one embodiment, the peaks and the troughs of the first corrugated plate are sharp angles; and the peaks and the troughs of the second corrugated plate are sharp angles.

In one embodiment, the device further comprises a second gas injection member disposed in the lumen, the first inlet is disposed at one end of the delivery tube, the second inlet is disposed on a side wall of the delivery tube, 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 a pressure of the second gas is greater than a pressure of the first gas.

In one embodiment, the second gas spraying member includes a main body portion and a plurality of branch portions connected to an outer peripheral surface of the main body portion, the gas outlets are formed in the main body portion and the branch portions, 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 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 groove formed by the first corrugated plate 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 groove, a plurality of areas of the gas are mixed in the direction, and the uniformity of the mixed gas in the plurality of areas in the direction is improved. At the same time, because a gap is arranged between the first corrugated plate and the cavity wall of the pipe cavity, the mixed gas can flow along the axial direction of the pipe cavity through the gap. The extending direction of the second guiding groove formed by the second corrugated plate in the second mixing module is arranged at an included angle with the cross section of the conveying pipe, so that at least a part of components of the extending direction are along the axial direction of the conveying pipe, and when gas flows through the second guiding groove, at least a plurality of areas in the axial direction of the conveying pipe can be mixed, and 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 mixed gas can be mixed along the axial direction of the conveying pipe and along the direction perpendicular to the axial direction of the conveying pipe, so that the mixing uniformity of the first gas and the second gas is improved to a greater extent.

Drawings

FIG. 1 is a schematic view of the 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 apparatus of FIG. 1 in another view;

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 (the cut-away position being upstream of the first mixing module);

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

fig. 6 is a schematic structural view of a first corrugated plate of a first mixing module according to an embodiment of the present application;

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

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

fig. 9 is a schematic view of the structure of the second corrugation plate of fig. 8;

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

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

Reference numerals:

a delivery tube 10, a lumen 11, a first inlet 12, a second inlet 13;

the first mixing module 20, the first corrugation plate 21, the first corrugation plate corrugation peak 211, the first corrugation plate corrugation trough 212, the first guiding groove 213, the first corrugation plate 214, the second first corrugation plate 215, the third first corrugation plate 216;

the second mixing module 30, the second corrugation plate 31, the second corrugation plate corrugation 311, the second corrugation plate corrugation trough 312, the second guiding groove 313, the first second corrugation plate 314, the second corrugation plate 315, and the third corrugation plate 316;

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

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

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

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.

FIG. 1 is a schematic view showing the overall structure of a gas mixing apparatus in an embodiment of the present application; FIG. 2 shows a schematic view of the overall structure 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 (the cut-away position being upstream of the first mixing module); FIG. 5 shows a cross-sectional view of the gas mixing device of FIG. 1 (the cut-away position being upstream of the second mixing module); fig. 6 is a schematic structural view of a first corrugated plate of a first mixing module according to an embodiment of the present application; fig. 7 is a schematic view showing the structure of the first corrugation plate of fig. 6; fig. 8 is a schematic structural view of a second corrugated plate of a second mixing module according to an embodiment of the present application; fig. 9 shows a schematic structural view of the second corrugation plate of fig. 8.

Referring to fig. 1 to 3, a gas mixing device according to an embodiment of the 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 using the gas mixing device.

The gas mixing device 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 delivery tube 10 has a lumen 11, and a first inlet 12 and a second inlet 13 communicating with the lumen 11, the first inlet 12 being for introducing a first gas, the second inlet 13 being for introducing a second gas, the flow direction of the mixed gas in the lumen 11 being parallel to the axial direction of the delivery tube 10. The first mixing module 20 and the second mixing module 30 are both disposed in the lumen 11 and 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 a wall of the lumen 11, and first guide grooves 213 for guiding the mixed gas are formed between adjacent peaks and adjacent valleys on the first corrugated plate 21, and an extending direction of the first guide grooves 213 is perpendicular to an 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, and second guiding grooves 313 for guiding the mixed gas are formed between adjacent peaks and adjacent valleys on the second corrugated plate 31, and an extending direction of the second guiding grooves 313 is set at an included angle with a 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 extending direction of the first guide grooves 213 formed by the first corrugated plates 21 in the first mixing module 20 is perpendicular to the axial direction of the conveying pipe 10, so that the gas flows in the direction perpendicular to the axial direction of the conveying pipe 10 when flowing through the first guide grooves 213, thereby mixing the gas in a plurality of regions in the direction and improving the uniformity of the gas in the plurality of regions in the direction. At the same time, since there is a gap between the first corrugation plate 21 and the lumen wall of the lumen 11, the mixed gas can flow in the axial direction of the lumen 11 through the gap. The second corrugated plate 31 of the second mixing module 30 has the extension direction of the second guide groove 313 disposed at an angle with respect to the cross section of the delivery pipe 10, so that at least a part of the extension direction is along the axial direction of the delivery pipe 10, and the gas can be mixed at least in a plurality of regions in the axial direction of the delivery pipe 10 when flowing through the second guide groove 313, thereby improving the uniformity of the plurality of regions in the axial direction of the delivery pipe 10. 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 the first gas and the second gas is improved to a greater extent.

Referring to fig. 1 and 4, in the embodiment shown in the drawings, the conveying pipe 10 is a circular pipe, and its cross section is circular, and the direction perpendicular to its axial direction is the 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 elliptical. In the following embodiments, the description will be made on the basis of a round tube as shown in the drawings.

Referring to fig. 3 and 4, in the embodiment shown in the drawings, the axial direction of the delivery tube 10 is indicated by the X ' X or XX ' direction, where the X ' X direction is the flow direction of the mixed gas in the lumen 11. The X ' X direction, the Y ' Y direction and the Z ' Z direction are perpendicular to each other, 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. The above-mentioned flow of the mixed gas along the axial direction of the transfer pipe 10 is from a macroscopic point of view, and from a microscopic point of view, the mixed gas also flows along the radial direction of the transfer pipe 10.

Referring to fig. 4, 6 and 7, specifically, the first corrugation plate 21 has a plurality of first corrugation plate peaks 211 and a plurality of first corrugation plate valleys 212. First guide grooves 213 for guiding the mixed gas are formed between the adjacent first corrugation plate corrugation peaks 211, and first guide grooves 213 for guiding the mixed gas are also formed between the adjacent first corrugation plate corrugation troughs 212. When the mixed gas flows to the first corrugation plate 21, the first guiding groove 213 guides the mixed gas so that the mixed gas tends to flow along the extending direction of the first guiding groove 213, thereby making the uniformity of the mixed gas higher in a plurality of regions from inside to outside in the radial direction of the transfer pipe 10 so as not to concentrate the mixed gas in the central region or in the edge region. Meanwhile, as the surface of the first corrugated plate 21 is in a corrugated shape with concave-convex fluctuation, the mixed gas collides with the first corrugated plate 21 when flowing to the first corrugated plate 21, which is favorable for forming turbulence of the mixed gas, and the mixed gas is distributed more dispersedly, so that the distribution uniformity of the mixed gas is improved.

Referring to fig. 5, 8 and 9, the second corrugation plate 31 has a plurality of second corrugation plate peaks 311 and a plurality of second corrugation plate valleys 312. Second guide grooves 313 for guiding the mixed gas are formed between adjacent second corrugation plate corrugation peaks 311, and second guide grooves 313 for guiding the mixed gas are also formed between adjacent second corrugation plate corrugation troughs 312. When the mixed gas flows to the second corrugation plate 31, the second guiding groove 313 guides the mixed gas so that the mixed gas tends to flow along the extending direction of the second guiding groove 313, thereby enabling the mixed gas to have higher uniformity in a plurality of regions in the axial direction of the transfer pipe 10 at least. Meanwhile, as the surface of the second corrugated plate 31 is in a corrugated shape with concave-convex fluctuation, the mixed gas collides with the second corrugated plate 31 when flowing to the second corrugated plate 31, thereby being beneficial to forming turbulence of the mixed gas and being more dispersed, and further improving the distribution uniformity of the mixed gas.

Referring to fig. 3, in some embodiments, the second mixing module 30 is axially aligned with the first mixing module 20 along the transfer tube 10, and the second mixing module 30 is downstream of the first mixing module 20. As previously described, from a macroscopic point of view, the mixed gas flows axially along the duct 10, so that in the upstream region of the second mixing module 30 and the first mixing module 20, the gas flows axially. According to the foregoing analysis, the first mixing module 20 can improve the uniformity of the mixed gas in the radial direction of the delivery pipe 10, and the second mixing module 30 can at least improve the uniformity of the mixed gas in the axial direction of the delivery pipe 10. In this embodiment, when the second mixing module 30 is located downstream of the first mixing module 20, the mixed gas will flow through the first mixing module 20, and the first corrugated plate 21 can convert the gas originally flowing along the axial direction of the conveying pipe 10 into the gas flowing along the radial direction of the conveying pipe 10. When the mixed gas flows through the second mixing module 30 again, the second corrugation plate 31 converts the flow direction of the gas into the axial direction of the transfer pipe 10 again. The mixed gas can be converted through two flow directions when flowing through the two mixing modules by the arrangement, the mixing effect can be better, and the uniformity can be further improved.

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 alternate with the first mixing modules 20 along the axial direction of the delivery tube 10. For example, the first mixing module 20 may be added downstream of the second mixing module 30, so that the gas can be subjected to three flow direction conversion 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 guiding groove 313 is disposed at an angle with respect to the cross section of the conveying pipe 10, and the extending direction of the second guiding groove 313 is disposed at an angle with respect to the axial direction of the conveying pipe 10. Specifically, the extending direction of the second guide groove 313 is disposed at an angle to both the radial direction and the axial direction of the conveying pipe 10. Thus, the second guide groove 313 extends in a direction in which a part of the component is in the axial direction of the transport pipe 10 and a part of the component is in the radial direction of the transport pipe 10. When the gas flows through the second guide groove 313, not only uniformity in the axial direction of the delivery pipe 10 but also uniformity in the radial direction of the delivery pipe 10 can be improved, and the mixing effect is better.

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

FIG. 10 is a schematic diagram of a first hybrid module according to 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 transfer pipe 10, and at least part of the first corrugation plates 21 have different extending directions. When a plurality of first corrugation plates 21 are provided, the gas can be dispersed to reach each of the first corrugation plates 21, thereby improving uniformity in the radial direction of the transfer tube 10, and the mixing effect can be better. At least part of the first corrugation plates 21 have different extension directions, but all extend in directions perpendicular to the axial direction of the transfer tube 10. When the gas reaches these first corrugation plates 21, a 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 the two adjacent first corrugated plates 21, the flowing direction is continuously changed by 90 degrees, which is advantageous for further improving the mixing uniformity.

With continued reference to fig. 3, 4 and 10, in some embodiments, preferably, the first mixing module 20 is located in at least a portion of the axial direction of the duct 10, and the adjacent first corrugated plate 21 is located in such a way that the projected outer contour of the upstream one along the axial direction of the duct 10 does not exceed the projected outer contour of the downstream one along the axial direction of the duct 10. Specifically, the first mixing module 20 is adjacent to the first corrugation plate 21 in at least a part of the region in the axial direction of the transfer pipe 10, and the radial dimension of the first corrugation plate 21 located upstream is not greater than the radial dimension of the first corrugation plate 21 located downstream. For example, among three adjacently disposed first corrugated plates 214, second first corrugated plates 215, and third first corrugated plates 216 shown in the drawings, the first corrugated plate 214 is located upstream of the second first corrugated plate 215, and the second first corrugated plate 215 is located upstream of the third first corrugated plate 216. 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 plate protruding in the upstream direction is referred to as a first corrugated plate crest 211, and the position of the three corrugated plate protruding in the downstream direction is referred to as a first corrugated plate trough 212. The gas flows first to the upstream side of the first corrugation plate 214, flows in the first guide grooves 213 formed between the adjacent first corrugation plate peaks 211, and when flowing to the edge position of the first corrugation plate 214, flows downstream in the axial direction of the transfer tube 10, and reaches the downstream side of the first corrugation plate 214, that is, the upstream side of the second corrugation plate 215. Thereafter, the gas will flow in the first guide grooves 213 formed between the adjacent first corrugation plate peaks 211 of the second first corrugation plate 215, and at the same time, will also flow in the first guide grooves 213 formed between the adjacent first corrugation plate valleys 212 of the first corrugation plate 214. Similarly, when flowing to the edge location of the second first corrugation plate 215, it will flow downstream in the axial direction of the tube 10 to downstream of the second first corrugation plate 215, i.e., upstream of the third first corrugation plate 216. Thereafter, the gas will flow in the first guide grooves 213 formed between adjacent first corrugation plate peaks 211 on the third first corrugation plate 216, and at the same time, will also flow in the first guide grooves 213 formed between adjacent first corrugation plate valleys 212 on the second first corrugation plate 215.

In the above-described flow process, since the radial dimension of the first corrugation plate 21 located upstream is not greater than the radial dimension of the first corrugation plate 21 located downstream, a flow path of "down-step" will be formed to reach the next corrugation plate when the gas flows to the edge of each corrugation plate. The arrangement can have better water conservancy diversion effect between adjacent buckled plate, makes gaseous more easily reach next buckled plate department, is favorable to realizing a lot of water conservancy diversion and mixing to further improve the mixing 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 in the axial direction of the transfer pipe 10 is maximized, 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 that the radial dimension of the first corrugation plate 21, which is located at the center in the axial direction of the transfer tube 10, is smaller than the radial dimension of the lumen 11, that is, that there is a gap between the first corrugation plate 21 and the lumen 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 within the first guiding 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 along the axial direction of the tube 10 is approximately circular. Preferably, the radial dimension of the first corrugated plate 21 is 90% of the radial dimension of the lumen 11, at this time, the gas can flow downstream through the gap more smoothly, and most of the gas can reach the gap after being guided by the first guiding grooves 213 of each first corrugated plate 21, and not directly flow downstream through the gap without being guided, i.e. has both conveying efficiency and mixing effect.

In other embodiments, it is also possible to make the radial dimension of the upstream first corrugation plate 21 of any two adjacent first corrugation plates 21 not larger than the radial dimension of the downstream first corrugation plate 21, that is, the radial dimension of all the first corrugation plates 21 is gradually increased in the flow direction. At this time, the radial dimension of one of the first corrugation plates 21 located most downstream is smaller than the radial dimension of the lumen 11, and the gas will form a "stepped down" 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 being arranged in a direction perpendicular to the axial direction of the transfer tube 10, and at least part of the second corrugation plates 31 being different in extending direction. For example, the second mixing module 30 includes a first second corrugation plate 314, a second corrugation plate 315, and a third corrugation plate 316 … …, and when a plurality of second corrugation plates 31 are provided, gas can flow between any two second corrugation plates 31 to be mixed, so that uniformity is improved. Preferably, the entire second mixing module 30 has a circular outer contour projected in the axial direction of the delivery tube 10 and has a radial dimension equal to the radial dimension of the lumen 11, i.e. no gap exists between the second mixing module 30 and the lumen 11. In this way, a portion of the gas may be caused to flow between adjacent second corrugated plates 31 and a portion of the gas may flow between the second corrugated plates 31 and the lumen wall of the lumen 11. In either way, the liquid flows through the second guide groove 313, so that the liquid can be guided and mixed thoroughly, and the uniformity is better. Preferably, the extending direction of any adjacent two second corrugation plates 31 is vertical, and the mixing effect is good.

Referring to fig. 7, in some embodiments, the peaks and valleys of the first corrugation plate 21 are pointed. Specifically, the first corrugated plate peaks 211 and the first corrugated plate valleys 212 are pointed. Thus, when the gas flows to the first corrugation plate wave crest 211 and the first corrugation plate wave trough 212, the gas can be better cut and dispersed, and the mixing effect is better.

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

Referring to fig. 7 and 9, preferably, the first corrugated plate peaks 211 and the first corrugated plate troughs 212 are pointed, and the second corrugated plate peaks 311 and the second corrugated plate troughs 312 are pointed.

Referring to fig. 4 and 7, it is preferable that the included angle α of the profile projected by 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, and the pressure drop is small and the flow efficiency is high when the gas flows.

Referring to fig. 9, similarly, the included angle α of the projection 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, and the pressure drop is small and the flow efficiency is high when the gas flows.

Referring to fig. 1 to 3, in some embodiments, the apparatus further includes a second gas injection member 40 disposed in the lumen 11, the first inlet 12 is located at one end of the delivery tube 10, the second inlet 13 is located at a side wall of the delivery tube 10, the gas inlet of the second gas injection member 40 is connected to the second inlet 13, the gas outlet of the second gas injection member 40 faces the first inlet 12, and the pressure of the second gas is greater than the pressure of the first gas. Specifically, the first gas is the primary gas, and 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 ejection member 40 is located on the side of itself close to the upstream side so that the gas can be ejected through the gas outlet toward the first inlet 12. Thus, the direction of the first gas and the direction of the second gas sprayed into the pipe cavity 11 are opposite, and the two opposite impacts can enable the mixing effect to be better. Since the pressure of the second gas is greater than the pressure of the first gas, the first gas can be restrained 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 injector 40 includes a main body 41 and a plurality of branch portions 42 connected to an outer peripheral surface of the main body 41, where the main body 41 and the branch portions 42 are each provided with a gas outlet, 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 conveying pipe 10 at 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 inner cavity of each branch portion 42 is communicated with the inner cavity of the main body 41. One end of the connection pipe 43 communicates with the second inlet 13, and the other end communicates with the inner cavity of the main body 41. The end face of the main body 41 near the upstream is provided with a plurality of first air outlets 411, and the side wall of the branch portion 42 near the upstream is provided with a plurality of second air outlets 421. 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 part of the second gas is ejected toward the first inlet 12 through the first gas outlet 411, and part of the second gas is ejected toward the first inlet 12 through the second gas outlet 421. The first air outlet 411 and the second air outlet 421 are matched to spray the second air, so that the second air can be sprayed out more uniformly in the radial direction of the tube cavity 11, the distribution is more uniform, and the uniformity of the mixed first air and the second air is improved. Preferably, the plurality of second air outlets 421 are arranged at intervals along the radial direction of the lumen 11, which is beneficial to further improving the uniformity of the first air in the radial direction of the lumen 11.

Preferably, the radial dimension of the first air outlet 411 is smaller than the radial dimension of the second air outlet 421. Similar to a water pipe, in this structure, the pressure at a position closer to the air source is larger, that is, the pressure at the first air outlet 411 is larger. In the present embodiment, by making the radial dimension of the first gas outlet 411 smaller, the amount of the gas ejected from the second gas outlet 421 can be increased, so that the second gas is ejected more uniformly in the radial direction of the lumen 11. Specifically, in some embodiments, the radial dimension of the first air outlet 411 is 80% of the radial dimension of the second air outlet 421. At this time, the distribution of the second gas in the radial direction of the lumen 11 after the ejection is more uniform.

The specific dimensions of the corrugated board and the gas flow rate parameters 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 mixed hydrogen ranges from 0 to 20%, and the speed of the hydrogen inlet (the second inlet 13) is 5 times that of the natural gas inlet (the first inlet 12). The lumen 11 has a diameter of 400mm. The inner diameter of the main body 41 is 160mm, and the inner diameter of the branch 42 is 20mm, and there are 6 branch 42 in total. The diameter of the first air outlet 411 is 8mm, and the diameter of the second air outlet 421 is 10mm. 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 sheets is 12, the height between the wave crest and the wave trough of the two sheets is 34mm.

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

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

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

the first mixing module is arranged in the lumen and positioned at the downstream of the first inlet and the second inlet, the first mixing module comprises a plurality of first corrugated plates which are arranged along the axial direction, at least part of the first corrugated plates are different in extending direction, gaps are reserved between the first corrugated plates and the lumen walls of the lumen, first guide grooves used for guiding the mixed gas are formed between adjacent wave crests and adjacent wave troughs on each first corrugated plate, the first guide grooves formed on the adjacent first corrugated plates are communicated, and the extending direction of the first guide grooves is perpendicular to the axial direction; the radial dimension of the first corrugation plates in the first mixing module at the axially central position is the largest, the radial dimension of each of the first corrugation plates upstream of the first corrugation plates in the axially central position is gradually increased in the flow direction, and the radial dimension of each of the first corrugation plates downstream of the first corrugation plates in the axially central position is gradually decreased in the flow direction;

the second mixes the module, locates the lumen and be located first entry with the low reaches of second entry, the second mixes the module and includes a plurality of edges perpendicular to the second buckled plate that axial direction was arranged, and at least part the extending direction of second buckled plate is different, every all form between adjacent crest and the adjacent trough on the second buckled plate and be used for right the second guide way of mixed gas direction, it is adjacent form on the second buckled plate the second guide way intercommunication, the extending direction of second guide way with the transversal contained angle setting of personally submitting of conveyer pipe.

2. The gas mixing device of claim 1, wherein the second mixing module is axially aligned with the first mixing module and the second mixing module is 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 of claim 1, wherein the extending direction of the second guide groove is disposed at an angle to the cross section of the delivery pipe, and the extending direction of the second guide groove is disposed at an angle to the axial direction.

5. A gas mixing device according to claim 1, wherein the direction of extension of any adjacent two of said first corrugated plates is perpendicular.

6. The gas mixing device of any one of claims 1 to 4, wherein the peaks and valleys of the first corrugated plate are pointed and the peaks and valleys of the second corrugated plate are pointed.

7. The gas mixing device of claim 1, further comprising a second gas jet member disposed in the lumen, the first inlet being located at one end of the delivery tube, the second inlet being located at a side wall of the delivery tube, the gas inlet of the second gas jet member being in communication with the second inlet, the gas outlet of the second gas jet member being oriented toward the first inlet, and the pressure of the second gas being greater than the pressure of the first gas.

8. The gas mixing device according to claim 7, 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 gas outlets are provided in the main body portion and the branch portions, and the plurality of branch portions are distributed in a circumferential direction of the main body portion.