An adjustable counter-flushing mixing device for a hydrogen-rich gas pipeline

Abstract

This invention relates to the field of hydrogen-rich gas mixture transportation technology, specifically an adjustable counter-flushing mixing device for hydrogen-rich gas pipelines. The device includes a mixer comprising a counter-flushing mixing cylinder, a spiral mixing cylinder, and a vortex mixing cylinder connected in series from bottom to top. Two inlet pipes are installed on the side wall of the counter-flushing mixing cylinder, each equipped with a flow valve. The two inlet pipes are positioned opposite each other at one end within the counter-flushing mixing cylinder, and a counter-flushing mixing component is installed inside the cylinder. A spiral mixing component is installed inside the spiral mixing cylinder for spiral agitation and mixing of the fluid. A vortex mixing component is installed inside the vortex mixing cylinder for vortex mixing of the fluid. This invention, through its three-stage mixing structure (counter-flushing mixing, spiral mixing, and vortex mixing), achieves multi-stage, multi-dimensional mixing enhancement, significantly improving the uniformity of the mixed gas flow, avoiding localized uneven mixing, and offering high reliability and safety performance, stable operation, and low maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of hydrogen-rich gas transport technology, and more specifically to an adjustable counter-flushing mixing device for hydrogen-rich gas pipelines. Background Technology

[0002] Hydrogen-rich gas mixtures are mixtures of gases (such as natural gas, nitrogen, and ammonia) mixed with a certain proportion of hydrogen. They are widely used in hydrogen energy utilization, industrial combustion, and gas transmission. During the transportation and use of hydrogen-rich gas mixtures, it is essential to ensure that the hydrogen is uniformly mixed with the other gases. The uniformity of this mixing directly affects combustion efficiency, operational stability, and safety.

[0003] In existing technologies, hydrogen-rich gas mixtures are mostly mixed using methods such as pipeline counter-flow gas mixers and static mixers. Traditional counter-flow mixers rely solely on the direct collision of two gas streams to achieve mixing, resulting in a short mixing path, insufficient disturbance, and a single gas flow path, which easily leads to localized uneven mixing.

[0004] Conventional static mixers have a simple mixing disturbance structure, relying solely on helical blades for single-direction helical disturbance. They lack multiple disturbance mechanisms such as jets and eddies, resulting in limited mixing depth and an inability to achieve multi-level, multi-dimensional mixing enhancement.

[0005] Meanwhile, existing devices lack precise adjustment of the intake air volume, making it difficult to adapt to the mixing requirements under different operating conditions and unable to guarantee the stability of the mixed gas composition.

[0006] To address the aforementioned problems, this invention provides an adjustable counter-flushing mixing device for hydrogen-rich mixed gas pipelines, featuring multi-stage series connection, adjustable flow rate, and multiple forms of disturbance. Summary of the Invention

[0007] In view of the above situation, the present invention provides an adjustable counter-flushing mixing device for hydrogen-rich gas pipelines. Through a three-stage mixing structure of counter-flushing mixing, spiral static mixing and vortex mixing, combined with adjustable air intake and multiple diversion, jet and vortex enhancement structures, it achieves efficient, uniform and stable mixing of hydrogen-rich gas, and solves the technical problems of existing gas mixers such as single mixing form, insufficient uniformity, inconvenient flow adjustment and poor multi-stage mixing effect.

[0008] The technical solution adopted in this invention is as follows: an adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline, comprising a mixer, wherein the mixer comprises a counter-flushing mixing cylinder, a spiral mixing cylinder, and a vortex mixing cylinder connected in series from bottom to top;

[0009] Two air inlet pipes are installed on the side wall of the counter-fluid mixing cylinder, which are symmetrically positioned and collinear. Each air inlet pipe is equipped with a flow valve, which can regulate the flow rate of the fluid entering the counter-fluid mixing cylinder. The two air inlet pipes are positioned opposite each other at one end inside the counter-fluid mixing cylinder to achieve fluid counter-fluid. A counter-fluid mixing assembly is installed inside the counter-fluid mixing cylinder.

[0010] The spiral mixing cylinder is equipped with a spiral mixing component inside, which is used to spirally agitate and mix the incoming fluid;

[0011] The vortex mixing cylinder is equipped with a vortex mixing component inside, which is used to mix the incoming fluid in a vortex.

[0012] Preferably, the counter-flushing mixing assembly includes a first partition, a first through hole, a first diverter plate, and a second diverter plate;

[0013] The bottom of the counter-fluid mixing cylinder is closed and the top opening is open. A first baffle is installed inside the first baffle. Multiple first through holes are opened through the edge of the first baffle. The mixing fluid inside the counter-fluid mixing cylinder can enter the interior of the spiral mixing cylinder through the multiple first through holes.

[0014] Preferably, both the first and second diverter plates are angled plates with a bend in the middle. The bottom ends of both the first and second diverter plates are fixedly connected to the bottom wall of the opposing mixing cylinder, and the top ends of both are in contact with the bottom surface of the first partition. There are two first diverter plates, which are symmetrically arranged on the front and rear sides of the two intake pipes facing each other, and their external corners are opposite each other.

[0015] Preferably, there are four second diverter plates, which are evenly distributed circumferentially on the outside of the two first diverter plates, with their positive corners facing the inner wall of the opposing mixing cylinder, and one side of each first diverter plate pointing to the negative corner of one of the second diverter plates.

[0016] Preferably, the flow valve is an electric flow regulating valve.

[0017] Preferably, the spiral mixing assembly includes an air inlet horn, an air outlet horn, a spiral mixing pipe, and spiral mixing blades;

[0018] The air inlet horn is installed inside the bottom opening of the spiral mixing cylinder, and the air outlet horn is installed inside the top opening of the spiral mixing cylinder. The ends of the air inlet horn and the air outlet facing the inside of the spiral mixing cylinder are both closed planes and taper towards the center into a frustum shape. Multiple spiral mixing tubes are fixedly installed between the opposite ends of the air inlet horn and the air outlet horn, and each spiral mixing tube is equipped with spiral mixing blades.

[0019] Preferably, the spiral mixing blade is a spiral structure that extends continuously along the axial direction, consisting of at least two spiral segments connected end to end, with the spiral directions of each pair of adjacent spiral segments being opposite, and the fluid flowing and mixing spirally along the spiral mixing blade;

[0020] Several DC through holes are arrayed on the surface of the spiral mixing blade along its spiral extension direction. Each DC through hole is arranged through the blade thickness direction to generate jet disturbance when the fluid flows in the spiral direction along the spiral mixing blade.

[0021] Preferably, the vortex mixing assembly includes a guide cone and a guide spiral plate. The guide cone is fixedly installed inside the bottom opening of the vortex mixing cylinder, with its tip facing downwards and placed inside the top opening of the spiral mixing cylinder. Multiple circumferentially evenly distributed guide spiral plates are installed on the cone surface of the guide cone.

[0022] Preferably, the vortex mixing assembly further includes a vortex arc plate, a jet pipe, a jet nozzle, a U-shaped tube, a second baffle plate, and a second through hole;

[0023] The inner wall of the vortex mixing cylinder is equipped with multiple circumferentially evenly distributed vortex arc plates. The other end of each vortex arc plate extends toward the middle of the vortex mixing cylinder. Multiple circumferentially evenly distributed injection pipes are fixedly installed on the outer side of the vortex mixing cylinder. Each injection pipe has at least one injection nozzle that extends obliquely into the interior of the vortex mixing cylinder. The outlet end of the injection nozzle on each injection pipe points to the inner arc surface of one of the vortex arc plates. Each injection pipe has a U-shaped tube connected to its outer wall. The other end of the U-shaped tube penetrates the side wall of the vortex mixing cylinder and communicates with the cavity located below the cone surface of the guide cone, which is used to guide the mixed fluid into the injection pipe.

[0024] A second baffle is installed inside the top opening of the vortex mixing cylinder, and a second through hole runs through the middle of the second baffle.

[0025] Preferably, the mixer further includes an exhaust end cover, the top of which is connected to an exhaust pipe, and the opposing mixing cylinder, spiral mixing cylinder, vortex mixing cylinder, and exhaust end cover are fixedly connected by sealing flange bolts.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This device, through flow valves, can independently regulate the flow rate of the fluid entering the opposing mixing cylinder through the two inlet pipes, thereby precisely controlling the flow rate and ratio of the mixed gas; when the high-pressure gas in the two inlet pipes enters the opposing mixing cylinder, it generates opposing gas turbulence to achieve initial opposing mixing of the fluid; by setting the first and second flow dividers, the mixed gas flow after initial opposing mixing can undergo multiple diversions during diffusion flow, resulting in two more opposing mixing processes. Figure 5(The direction of the middle arrow indicates the counter-flow path of the mixed gas flow). Compared with the single direct counter-flow mixing of existing counter-flow mixers, this device uses a counter-flow mixing component to generate multiple refractive counter-flows of the mixed gas after the initial counter-flow, and the mixed gas flow can generate a total of three counter-flows, thereby enhancing the counter-flow mixing efficiency of the hydrogen-rich mixed gas and improving the mixing uniformity.

[0028] 2. By setting up a spiral mixing blade consisting of at least two spiral segments connected end to end, with each pair of adjacent spiral segments having opposite spiral directions, the mixed airflow enters the spiral mixing tube after being mixed and flows upward rapidly. During this process, the mixed airflow flows along the spiral direction of the spiral mixing blade and mixes. When passing through a spiral segment with opposite spiral directions, the flow direction of the mixed airflow changes, thereby generating spiral disturbances in different directions, further promoting thorough mixing of the mixed airflow. Several direct-flow holes are distributed on the surface of the spiral mixing blades, which are used to allow part of the airflow to directly pass through the direct-flow holes for straight-line injection when the fluid flows along the spiral direction of the spiral mixing blades, thereby jet disturbance of the spiral airflow, enhancing the spiral mixing effect, and achieving the purpose of secondary mixing.

[0029] 3. By setting up a guide cone, guide spiral plate, U-shaped tube, nozzle, and vortex arc plate, the mixed airflow diffuses and flows in all directions along the conical surface of the guide cone. Upon passing through multiple guide spiral plates, swirling flow is generated, thus initially creating vortex mixing in the mixed airflow. When the mixed airflow diffuses to the top of the guide cone, it is guided into the interior of multiple U-shaped tubes, flows into multiple nozzles, and then is obliquely and at high speed injected from multiple nozzles onto the inner arc surface of the vortex arc plate. Guided by the inner arc surface of the multiple vortex arc plates, the main vortex is generated in the middle of the vortex mixing cylinder. Figure 8 The direction of the middle arrow indicates the vortex flow path of the mixed airflow, thus achieving three-stage mixing of the mixed airflow.

[0030] 4. The mixed airflow passes through a three-stage continuous mixing structure (counter-current mixing, spiral mixing, and vortex mixing), which can achieve multi-stage and multi-dimensional mixing enhancement, significantly improving the mixing uniformity of the mixed airflow and avoiding the problem of local mixing inhomogeneity.

[0031] This device is a fully static hybrid structure with no transmission components. There is no potential risk (ignition, explosion) caused by heat generated during the operation of transmission components. It has high reliability and safety performance, stable operation, and low maintenance cost. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the mixer of the present invention.

[0033] Figure 2 This is a left view of the mixer of the present invention.

[0034] Figure 3 For the present invention Figure 2 Sectional view at point AA.

[0035] Figure 4 This is a front view of the mixer of the present invention.

[0036] Figure 5 For the present invention Figure 4 Sectional view at point BB.

[0037] Figure 6 For the present invention Figure 3 A magnified view of point C in the middle.

[0038] Figure 7 This is a three-dimensional schematic diagram of the spiral mixing blade of the present invention.

[0039] Figure 8 For the present invention Figure 4 Sectional view at point DD.

[0040] Figure 9 This is a schematic diagram of the flow guide cone and flow guide spiral plate of the present invention.

[0041] Figure 10 This is a cross-sectional view of the eddy current mixing component of the present invention.

[0042] In the picture:

[0043] 1. Mixer; 11. Counter-current mixing cylinder; 110. Inlet pipe; 111. Counter-current mixing assembly; 112. First baffle; 113. First through hole; 114. First splitter plate; 115. Second splitter plate; 116. Flow valve; 12. Spiral mixing cylinder; 121. Spiral mixing assembly; 122. Inlet bell; 123. Outlet bell; 124. Spiral mixing pipe; 125. Spiral mixing blade; 126. Direct flow through hole; 13. Vortex mixing cylinder; 131. Vortex mixing assembly; 132. Guide cone; 133. Guide spiral plate; 134. Vortex arc plate; 135. Injection pipe; 136. Injection nozzle; 137. U-tube; 138. Second baffle; 139. Second through hole; 14. Outlet end cover; 141. Outlet pipe; 15. Sealing flange. Detailed Implementation

[0044] The following will refer to the appendix. Figures 1-10 The description provides a detailed description of various embodiments of the present invention.

[0045] Example 1: An adjustable counter-flushing mixing device for a hydrogen-rich gas pipeline, as shown in the attached... Figures 1-10As shown, it includes a mixer 1, which includes a counter-current mixing cylinder 11, a spiral mixing cylinder 12, a vortex mixing cylinder 13, and an exhaust end cover 14 connected coaxially from bottom to top. The top of the exhaust end cover 14 is connected to an exhaust pipe 141.

[0046] The bottom of the counter-mixing cylinder 11 is sealed with a bottom-sealing structure and the top is open. Its top is fixedly connected to the bottom of the spiral mixing cylinder 12. The upper and lower ends of the spiral mixing cylinder 12 and the vortex mixing cylinder 13 are open. The top of the spiral mixing cylinder 12 is fixedly connected to the bottom of the vortex mixing cylinder 13. The bottom of the exhaust end cover 14 is open and fixedly installed on the top of the vortex mixing cylinder 13. The top of the exhaust pipe 141 is equipped with a flange, which allows the exhaust pipe 141 to be connected to the conveying pipeline.

[0047] The opposing mixing cylinder 11, spiral mixing cylinder 12, vortex mixing cylinder 13, and outlet end cover 14 are respectively fixedly connected by sealing flanges 15 and bolts. The internal cavities of the four are interconnected. When the cylinders are fixedly connected, sealing gaskets are installed between the sealing flanges 15 to achieve the sealing of the connection between the cylinders and avoid air leakage. The installation of flanges and bolts makes assembly, disassembly, and maintenance convenient.

[0048] Two air inlet pipes 110 are installed on the side wall of the counter-mixing cylinder 11, which are symmetrically positioned and collinear. The outer end of the air inlet pipe 110 is provided with a flange and is connected to the gas source pipeline to be mixed through the flange. Both air inlet pipes 110 are equipped with flow valves 116, which are remotely controllable electric flow regulating valves. The flow valves 116 can independently regulate the flow rate of the fluid entering the counter-mixing cylinder 11 from the two air inlet pipes 110, thereby accurately controlling the flow rate and ratio of the mixed gas, adapting to the flow requirements of different hydrogen-rich concentrations and different working conditions, with fast adjustment response and high control accuracy.

[0049] Two air inlet pipes 110 are positioned opposite each other at one end inside the opposing mixing cylinder 11. When the high-pressure gas entering the two air inlet pipes 110 enters the opposing mixing cylinder 11 at high speed, it creates an opposing flow, thereby generating turbulent flow of mixed gas inside the opposing mixing cylinder 11 to achieve initial opposing mixing of the fluid.

[0050] The anti-flush mixing cylinder 11 is equipped with an anti-flush mixing component 111, which causes the mixed gas after initial anti-flush to undergo multiple refraction anti-flushing, thereby enhancing the anti-flushing effect. The anti-flush mixing component 111 includes a first baffle 112, a first through hole 113, a first diverter plate 114, and a second diverter plate 115.

[0051] The bottom of the counter-current mixing cylinder 11 is closed and the top opening is open. A first baffle 112 is installed inside the cylinder. The first baffle 112 prevents the counter-current airflow from directly entering the spiral mixing cylinder 12. Multiple first through holes 113 are opened through the edge of the first baffle 112, and the mixed gas inside the counter-current mixing cylinder 11 can enter the spiral mixing cylinder 12 through the multiple first through holes 113.

[0052] Both the first diverter plate 114 and the second diverter plate 115 are angled plates with a bend in the middle. The bottom ends of the first diverter plate 114 and the second diverter plate 115 are fixedly connected to the bottom wall of the opposing mixing cylinder 11, and the top ends of the first diverter plate 112 abut against the bottom surface. There are two first diverter plates 114, which are symmetrically arranged on the front and rear sides of the two intake pipes 110 facing each other, and their external corners are opposite each other.

[0053] There are four second diverter plates 115, which are evenly distributed circumferentially outside the two first diverter plates 114, with their external corners pointing towards the inner wall of the opposing mixing cylinder 11. One side of each first diverter plate 114 points to the internal corner of one of the second diverter plates 115. When the mixed gas after opposing mixing diffuses rapidly outward, it can follow the path shown in the figure. Figure 5 The arrow direction is refracted and mixed multiple times.

[0054] Specifically: the mixed airflow ejected and mixed by the two intake pipes 110 diffuses towards the external corners of the two first split plates 114, and is then split by the first split plates 114, so that the mixed airflow flows along the two surfaces of the external corners of the first split plates 114 and flows into the internal corner of the second split plate 115 to achieve mixing again.

[0055] Then the mixed airflow is refracted from the inside of the inner corner of the second splitter plate 115 to the inside of the inner corner of the first splitter plate 14. The airflow refracted inside the inner corner of the second splitter plate 115 on both sides of the first splitter plate 14 can generate counter-mixing again inside the inner corner of the first splitter plate 114. Finally, the mixed airflow inside the inner corner of the first splitter plate 114 flows towards the first through hole 113 and is discharged from the first through hole 113 into the spiral mixing cylinder 12.

[0056] By using the first diverter plate 114 and the second diverter plate 115, the mixed airflow ejected from the two inlet pipes 110 and initially mixed by offset is diverted multiple times during diffusion flow, and then mixed by offset twice. Compared with the single direct offset mixing of existing offset mixers, this device can generate a total of three offset mixings through the offset mixing component 111, thereby enhancing the offset mixing efficiency of hydrogen-rich mixed gas and improving the mixing uniformity.

[0057] The spiral mixing cylinder 12 is equipped with a spiral mixing assembly 121 for spirally agitating and mixing the incoming fluid; the spiral mixing assembly 121 includes an air inlet horn 122, an air outlet horn 123, a spiral mixing tube 124, and spiral mixing blades 125.

[0058] The air inlet 122 is fixedly installed inside the bottom opening of the spiral mixing cylinder 12 by welding, and the air outlet 123 is fixedly installed inside the top opening of the spiral mixing cylinder 12 by welding. The ends of the air inlet 122 and the air outlet 123 facing the inside of the spiral mixing cylinder 12 are both closed planes and taper towards the center into a frustum shape. Multiple spiral mixing tubes 124 are fixedly installed between the opposite ends of the air inlet 122 and the air outlet 123, and each spiral mixing tube 124 is equipped with a spiral mixing blade 125.

[0059] The spiral mixing blade 125 is a spiral structure that extends continuously along the axial direction. It consists of at least two spiral segments connected end to end. The spiral directions of each pair of adjacent spiral segments are opposite. After the mixed airflow enters the spiral mixing cylinder 12 through the first through hole 113, it first enters the air inlet horn 122, and then splits into the bottom openings of multiple spiral mixing tubes 124 and flows upward rapidly. During the flow, the mixed airflow flows along the spiral direction of the spiral mixing blade 125 for mixing. When it passes through a spiral segment with the opposite spiral direction, the flow direction of the mixed airflow changes, so that the airflow continuously generates spiral reversal disturbances in different directions during the spiral propulsion process, further promoting the full mixing of the mixed airflow and achieving the purpose of secondary mixing.

[0060] Several direct current through holes 126 are arrayed on the surface of the spiral mixing blade 125 along its spiral extension direction. Each direct current through hole 126 is arranged through the blade thickness direction. When the fluid flows in the spiral direction along the spiral mixing blade 125, part of the airflow directly passes through the direct current through hole 126 for straight injection, thereby jetting the spiral airflow and enhancing the spiral mixing effect.

[0061] Compared to the existing static mixers with their simple mixing disturbance structure that relies solely on helical blades for unidirectional helical disturbance, this device employs multi-segmented helical mixing blades 125 with opposite helical directions to continuously reverse and shear the airflow, thus increasing the structure and effect of jet disturbance and achieving a higher mixing efficiency than existing static mixers.

[0062] The mixed airflow after being helically mixed by the helical mixing blades 125 flows out from the top openings of multiple helical mixing tubes 124 to the outlet horn 123 and merges into the interior of the vortex mixing cylinder 13.

[0063] The vortex mixing cylinder 13 is equipped with a vortex mixing component 131 inside, which is used to mix the incoming fluid in a vortex. The vortex mixing component 131 includes a guide cone 132, a guide spiral plate 133, a vortex arc plate 134, a jet pipe 135, a jet nozzle 136, a U-shaped tube 137, a second baffle 138, and a second through hole 139.

[0064] The guide cone 132 is fixedly installed inside the bottom opening of the vortex mixing cylinder 13, with its tip pointing downwards and placed inside the outlet 123 inside the top opening of the spiral mixing cylinder 12. The bottom end of the guide cone 132 is located above multiple spiral mixing tubes 124, and multiple circumferentially evenly distributed guide spiral plates 133 are installed on the cone surface of the guide cone 132.

[0065] When the mixed airflow after spiral mixing flows out from the top opening of multiple spiral mixing tubes 124 to the inside of the air outlet 123, the mixed airflow continues to flow upward and spreads in all directions along the conical surface of the guide cone 32. When the airflow passes through multiple guide spiral plates 133, it generates swirling flow, thereby causing the mixed airflow entering the vortex mixing cylinder 13 to initially generate vortex mixing.

[0066] Multiple circumferentially evenly distributed vortex arc plates 134 are installed on the inner wall of the vortex mixing cylinder 13. The other end of each vortex arc plate 134 extends towards the middle of the vortex mixing cylinder 13. Multiple circumferentially evenly distributed injection pipes 135 are fixedly installed on the outer side of the vortex mixing cylinder 13. At least one injection nozzle 136 obliquely penetrates into the interior of the vortex mixing cylinder 13 is connected to the outer wall of each injection pipe 135. In this embodiment, the number of injection nozzles 136 on each injection pipe 135 is 5. Figure 10 As shown), the outlet end of the nozzle 136 on each injection pipe 135 points to the inner arc surface of one of the vortex arc plates 134. The nozzle 136 forms an angle with the radial line of the vortex mixing cylinder 13, with the angle being 30°-45°, preferably 30°. The 30° angle allows the jetting airflow to better conform to the inner arc surface of the vortex arc plate 134, forming a stable main vortex. At the same time, it reduces the local resistance between the nozzle 136 and the inner arc surface during airflow injection, ensuring mixing stability. Each injection pipe 135 is connected to a U-shaped pipe 137 on its outer wall. The other end of the U-shaped pipe 137 penetrates the side wall of the vortex mixing cylinder 13 and communicates with the cavity located below the cone surface of the guide cone 132, for introducing the mixed fluid into the injection pipe 135.

[0067] As the mixed airflow diffuses along the conical surface of the guide cone 32 to its top, it is introduced into the bottom of multiple U-shaped tubes 137 and flows along the U-shaped tubes 137 into multiple injection tubes 135. Then, it is obliquely and at high speed injected from multiple injection nozzles 136 onto the inner arc surface of the vortex arc plate 134. Guided by the inner arc surface of the multiple vortex arc plates 134, the mixed airflow converges in the middle of the vortex mixing cylinder 13, generating a main vortex. Figure 8 The direction of the middle arrow indicates the vortex flow path of the mixed airflow, thus achieving three-stage mixing of the mixed airflow.

[0068] A second baffle 138 is installed inside the top opening of the vortex mixing cylinder 13. A second through hole 139 passes through the middle of the second baffle 138. The second baffle 138 can prevent the mixed airflow from being ejected from the nozzle 136 and directly entering the exhaust end cover 14 for discharge. This can increase the residence time of the mixed airflow in the vortex mixing cylinder 13. When the air pressure inside the vortex mixing cylinder 13 increases, the mixed airflow can be discharged from the second through hole 139 into the exhaust end cover 14 and discharged through the exhaust pipe 141.

[0069] The mixed airflow passes through a three-stage continuous mixing structure (counter-current mixing, spiral mixing, and vortex mixing), which enables multi-stage and multi-dimensional mixing enhancement, significantly improving the mixing uniformity of the mixed airflow and avoiding the problem of localized uneven mixing.

[0070] This device is a fully static hybrid structure with no transmission components. There is no potential risk (ignition, explosion) caused by heat generated during the operation of transmission components. It has high reliability and safety performance, stable operation, and low maintenance cost.

[0071] It can be directly connected to the pipeline for conveying flammable and explosive hydrogen-rich mixed gas. The two inlet pipes 110 are respectively connected to the hydrogen source and the gas source to be mixed through flanges. The outlet pipe 141 can be connected to the subsequent conveying pipeline system or equipment through flanges.

[0072] It should be noted that in the description of this invention, terms such as “center,” “upper,” “lower,” “left,” “right,” “vertical,” “horizontal,” “inner,” and “outer,” which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline, comprising a mixer (1), characterized in that, The mixer (1) includes a counter-current mixing cylinder (11), a spiral mixing cylinder (12), and a vortex mixing cylinder (13) connected in series from bottom to top. The opposing mixing cylinder (11) has two air inlet pipes (110) installed on its side wall, which are symmetrically positioned and collinear. Each air inlet pipe (110) is equipped with a flow valve (116), which can regulate the flow rate of the fluid entering the opposing mixing cylinder (11). The two air inlet pipes (110) are positioned opposite each other at one end inside the opposing mixing cylinder (11) to achieve fluid opposing. The opposing mixing cylinder (11) is equipped with an opposing mixing assembly (111). The spiral mixing cylinder (12) is provided with a spiral mixing component (121) inside, which is used to spirally agitate and mix the incoming fluid; The vortex mixing cylinder (13) is provided with a vortex mixing component (131) inside, which is used to mix the incoming fluid in a vortex.

2. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 1, characterized in that, The counter-flushing mixing assembly (111) includes a first partition (112), a first through hole (113), a first diverter plate (114), and a second diverter plate (115). The bottom of the counter-fluid mixing cylinder (11) is closed and the top opening is open. A first partition (112) is installed inside the cylinder. Multiple first through holes (113) are opened through the edge of the first partition (112). The mixed fluid inside the counter-fluid mixing cylinder (11) can enter the interior of the spiral mixing cylinder (12) through the multiple first through holes (113).

3. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 2, characterized in that, Both the first diverter plate (114) and the second diverter plate (115) are angle plates with a bend in the middle. The bottom ends of the first diverter plate (114) and the second diverter plate (115) are fixedly connected to the bottom wall of the counter-flushing mixing cylinder (11), and the top ends are in contact with the bottom surface of the first partition plate (112).

4. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 1, characterized in that, The flow valve (116) is an electric flow regulating valve.

5. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 1, characterized in that, The spiral mixing assembly (121) includes an air inlet horn (122), an air outlet horn (123), a spiral mixing pipe (124), and spiral mixing blades (125). The air inlet horn (122) is installed inside the bottom opening of the spiral mixing cylinder (12), and the air outlet horn (123) is installed inside the top opening of the spiral mixing cylinder (12). The ends of the air inlet horn (122) and the air outlet horn (123) facing the inside of the spiral mixing cylinder (12) are both closed planes and taper towards the center into a frustum shape. Multiple spiral mixing tubes (124) are fixedly installed between the opposite ends of the air inlet horn (122) and the air outlet horn (123), and each spiral mixing tube (124) is equipped with a spiral mixing blade (125).

6. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 5, characterized in that, The spiral mixing blade (125) is a spiral structure that extends continuously along the axial direction. It consists of at least two spiral segments connected end to end. The spiral directions of each pair of adjacent spiral segments are opposite, and the fluid flows and mixes spirally along the spiral mixing blade (125).

7. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 1, characterized in that, The vortex mixing assembly (131) includes a guide cone (132) and a guide spiral plate (133). The guide cone (132) is fixedly installed inside the bottom opening of the vortex mixing cylinder (13), with its tip facing down inside the top opening of the spiral mixing cylinder (12). Multiple circumferentially evenly distributed guide spiral plates (133) are installed on the cone surface of the guide cone (132).

8. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 7, characterized in that, The vortex mixing assembly (131) also includes a vortex arc plate (134), a jet pipe (135), a jet nozzle (136), a U-shaped tube (137), a second partition plate (138), and a second through hole (139). The inner wall of the vortex mixing cylinder (13) is equipped with a plurality of circumferentially evenly distributed vortex arc plates (134), the other end of each vortex arc plate (134) extends toward the middle of the vortex mixing cylinder (13), and a plurality of circumferentially evenly distributed injection pipes (135) are fixedly installed on the outer side of the vortex mixing cylinder (13). Each injection pipe (135) is connected to at least one injection nozzle (136) that extends obliquely into the interior of the vortex mixing cylinder (13), and the outlet end of the injection nozzle (136) on each injection pipe (135) points to the inner arc surface of one of the vortex arc plates (134). Each injection pipe (135) is connected to a U-shaped pipe (137) on its outer wall, the other end of which penetrates the side wall of the vortex mixing cylinder (13) and communicates with the cavity located below the cone surface of the guide cone (132) for introducing the mixed fluid into the injection pipe (135). A second baffle (138) is installed inside the top opening of the vortex mixing cylinder (13), and a second through hole (139) is passed through the middle of the second baffle (138).

9. The adjustable counter-flushing mixing device for a hydrogen-rich mixed gas pipeline according to claim 1, characterized in that, It also includes an exhaust end cover (14), the top of which is connected to an exhaust pipe (141), and the opposing mixing cylinder (11), spiral mixing cylinder (12), vortex mixing cylinder (13) and exhaust end cover (14) are fixedly connected by a sealing flange (15) bolts.

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