Gas mixer and denitration system
By introducing turbulent and swirling structures into the gas mixer, the problem of uneven mixing of ammonia and hot air was solved, achieving a more efficient denitrification effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN LONGKING DSDN ENGINEERING CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, the mixing uniformity of ammonia and hot air is insufficient, which affects the denitrification efficiency of the denitrification system.
A gas mixer was designed, comprising a shell, a deflector structure, and a swirl structure. The deflector structure is used to place deflector blades and swirl blades upstream and downstream of the gas flow direction to promote the mixing of ammonia and hot air, forming a more uniform gas mixture.
This improved the uniformity of ammonia and hot air mixing, enhanced the reaction efficiency of the denitrification system, and avoided the impact of local concentration differences on the reaction.
Smart Images
Figure CN224404982U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of flue gas denitrification technology, and more particularly to a gas mixer and a denitrification system. Background Technology
[0002] In recent years, large thermal power plants and steel mills have primarily used denitrification systems to treat flue gas. These systems include gas mixers that mix ammonia and hot air to form a denitrification agent for subsequent denitrification operations.
[0003] Since the uniformity of the mixing of ammonia and hot air is an important factor affecting the denitrification efficiency of the denitrification system, it is crucial to improve the uniformity of the mixing of ammonia and hot air. Utility Model Content
[0004] The purpose of this application is to provide a gas mixer and a denitrification system, which aims to solve the problem of how to improve the mixing uniformity of ammonia and hot air.
[0005] In a first aspect, embodiments of this application provide a gas mixer, including a housing and a turbulent flow structure.
[0006] The tube shell has an inner cavity, a first inlet for a first gas to enter, a second inlet for a second gas to enter, and an outlet. The first inlet, the second inlet, and the outlet are all connected to the inner cavity so that the first gas and the second gas entering the inner cavity mix to form a preliminary mixed gas when flowing toward the outlet.
[0007] The turbulence structure is disposed within the inner cavity, and is located downstream of the first inlet and the second inlet along the flow direction of the first gas or the second gas, so that the preliminary mixed gas generates turbulence when passing through the turbulence structure, and mixes to form a mixed gas under the action of the turbulence.
[0008] In some embodiments, the flexural structure includes a connecting body and at least two flexural blades disposed on the connecting body;
[0009] The connecting body is connected to the inner cavity, and at least two of the deflection blades are arranged circumferentially along the shell. The deflection blades extend in a direction perpendicular to the flow of the first gas or the second gas and are inclined relative to the cross-section of the shell.
[0010] In some embodiments, the tilt angle of the deflector blades ranges from 30° to 60°;
[0011] And / or, at least two of the deflection blades are arranged in a centrally symmetrical manner with respect to the center of the connecting body;
[0012] And / or, the connecting body includes a first connecting blade and a second connecting blade, the first connecting blade and the second connecting blade are intersecting and arranged, and the outer edges of the first connecting blade and the outer edges of the second connecting blade are both connected to the inner cavity;
[0013] And / or, the connecting body and the deflector blade are integrally formed.
[0014] In some embodiments, the gas mixer further includes a swirling structure located between the first inlet and the second inlet along the flow direction of the first gas or the second gas, such that the first gas flowing into the cavity through the first inlet forms a swirling flow when passing through the swirling structure.
[0015] In some embodiments, the swirl structure includes a supporting outer ring, a supporting inner ring, and at least two swirl blades;
[0016] The inner support ring is disposed within the outer support ring, and at least two swirl blades are connected between the outer support ring and the inner support ring and are spaced apart along the circumference of the tube shell; the swirl blades extend parallel to the flow direction of the first gas or the second gas and are inclined relative to the central axis of the tube shell.
[0017] In some embodiments, the tilt angle of the swirl blades ranges from 30° to 60°;
[0018] And / or, at least two of the swirl blades are arranged in a centrally symmetrical manner with respect to the center of the inner support ring;
[0019] And / or, the swirl structure further includes at least two support blades, which are disposed on the outer periphery of the outer support ring and spaced apart circumferentially along the outer support ring, and all the support blades are connected to the inner cavity.
[0020] In some embodiments, the shell includes a first conical shell section, a straight shell section, and a second conical shell section that are sequentially connected and communicate with each other along the length of the shell; the first inlet is located in the first conical shell section, the second inlet is located in the straight shell section, and the outlet is located in the second conical shell section;
[0021] Along the direction from the first conical shell segment to the second conical shell segment, the inner diameter of the first conical shell segment gradually increases, and / or the inner diameter of the second conical shell segment gradually decreases.
[0022] In some embodiments, the gas mixer includes an injection tube, at least a portion of which extends into the inner cavity through the second inlet, one end of which has an injection inlet for the second gas to enter, and the other end of which has an injection outlet communicating with the inner cavity;
[0023] Along the direction from the injection inlet to the injection outlet, the inner diameter of at least the portion of the injection pipe where the injection outlet is located gradually decreases.
[0024] In some embodiments, the injection pipe includes a straight pipe, a bend, and a tapered pipe connected in sequence and in communication; the straight pipe extends radially along the pipe shell, and the tapered pipe extends longitudinally along the pipe shell.
[0025] The injection inlet is located at the end of the straight pipe away from the bend, and the injection outlet is located at the end of the tapered pipe away from the bend. The inner diameter of the tapered pipe gradually decreases along the direction from the injection inlet to the injection outlet.
[0026] Secondly, embodiments of this utility model provide a denitrification system, including a gas mixer.
[0027] The beneficial effects of this utility model are:
[0028] This application provides a gas mixer and a denitrification system. The gas mixer includes a shell and a deflection structure. The shell has an inner cavity, a first inlet for a first gas, a second inlet for a second gas, and an outlet. The first inlet, second inlet, and outlet are all connected to the inner cavity, so that the first gas and the second gas entering the inner cavity mix to form a preliminary mixed gas as they flow toward the outlet. The deflection structure is located inside the inner cavity and downstream of the first and second inlets along the flow direction of the first or second gas. This causes the preliminary mixed gas to generate deflection as it passes through the deflection structure, allowing for more thorough mixing of the preliminary mixed gas formed by the first and second gases under the action of the deflection, ultimately forming a mixed gas with better mixing uniformity. This effectively improves the mixing uniformity of the first and second gases. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the gas mixer shown in the embodiment of this application;
[0031] Figure 2 This is a schematic diagram of the swirl structure of the gas mixer described in the embodiments of this application. Figure 1 ;
[0032] Figure 3 This is a schematic diagram of the swirl structure of the gas mixer described in the embodiments of this application. Figure 2 ;
[0033] Figure 4 This is a schematic diagram of the swirl structure of the gas mixer described in the embodiments of this application. Figure 3 ;
[0034] Figure 5 This is a schematic diagram of the turbulence structure of the gas mixer described in the embodiments of this application. Figure 1 ;
[0035] Figure 6 This is a schematic diagram of the turbulence structure of the gas mixer described in the embodiments of this application. Figure 2 ;
[0036] Figure 7 This is a schematic diagram of the deflection blades of the deflection structure of the gas mixer described in the embodiments of this application.
[0037] Figure label:
[0038] 100. Tube shell; 110. Inner cavity; 120. First inlet; 130. Second inlet; 140. Outlet; 150. First conical shell section; 160. Straight shell section; 170. Second conical shell section; 200. Flexural structure; 210. Connecting body; 211. First connecting blade; 212. Second connecting blade; 220. Flexural blade; 300. Swirl structure; 310. Supporting outer ring; 320. Supporting inner ring; 330. Swirl blade; 340. Supporting blade; 400. Injection pipe; 410. Injection inlet; 420. Injection outlet; 430. Straight pipe; 440. Bend; 450. Conical pipe; 510. Butt-welded flange; 520. Reverse flange; 530. Fastener. Detailed Implementation
[0039] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.
[0040] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or structure that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or structure. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or structure that includes that element.
[0041] Reference Figure 1 , Figures 5 to 7 As shown, this embodiment provides a gas mixer, including a housing 100 and a turbulence structure 200.
[0042] The tube shell 100 has an inner cavity 110, a first inlet 120 for a first gas to enter, a second inlet 130 for a second gas to enter, and an outlet 140. The first inlet 120, the second inlet 130, and the outlet 140 are all connected to the inner cavity 110 so that the first gas and the second gas entering the inner cavity 110 mix to form a preliminary mixed gas when flowing toward the outlet 140.
[0043] The turbulence structure 200 is disposed in the inner cavity 110, and in the flow direction of the first gas or the second gas, the turbulence structure 200 is located downstream of the first inlet 120 and the second inlet 130, so that the preliminary mixed gas generates turbulence when passing through the turbulence structure 200, and mixes to form a mixed gas under the action of the turbulence.
[0044] In specific implementation, refer to Figure 1 As shown, the first inlet 120 can be located at the left end of the shell 100, the outlet 140 is located at the right end of the shell 100, and the second inlet 130 is located on the side wall of the shell 100. The flow direction of the first gas and the second gas in the shell 100 is basically along the direction towards the outlet 140. The specific gas flow direction can be referred to Figure 1 As shown by the dashed arrow in the image.
[0045] In practical use, a first gas is introduced into the inner cavity 110 through the first inlet 120, and a second gas is introduced into the inner cavity 110 through the second inlet 130. Both the first gas and the second gas flow in the inner cavity 110 toward the outlet 140 and are mixed to a certain extent.
[0046] To improve the mixing degree or uniformity of the first gas and the second gas, a deflection structure 200 can be provided downstream of the first inlet 120 and the second inlet 130. That is, the deflection structure 200 is located on the side of the first inlet 120 and the second inlet 130 facing the outlet 140. This allows the first gas entering the inner cavity 110 through the first inlet 120 and the second gas entering the inner cavity 110 through the second inlet 130 to initially mix and form a preliminary mixed gas. Then, the deflection structure 200 forms a deflection to further mix the preliminary mixed gas and form a mixed gas with a better degree of uniformity.
[0047] For example, when the first inlet 120 is located on the left end face of the casing 100 and the second inlet 130 is located on the side wall of the casing 100, the second inlet 130 is closer to the outlet 140 than the first inlet 120, that is, the second inlet 130 is located downstream of the first inlet 120. In this case, the deflection structure 200 is located downstream of the second inlet 130, that is, closer to the outlet 140. Alternatively, in other implementations, if the first inlet 120 is closer to the outlet 140 than the second inlet 130, that is, the first inlet 120 is located downstream of the second inlet 130, then the deflection structure 200 is located downstream of the first inlet 120.
[0048] For example, the first gas can be hot air, specifically air that has been heated by a centrifugal fan and fed to a steam heater. The temperature of the heated gas can be between 150 degrees Celsius and 300 degrees Celsius. For example, the second gas can be ammonia. The specific settings for the first and second gases can be selected according to actual conditions.
[0049] Specifically, turbulent flow is a lateral or secondary flow generated by the interaction between the main flow and the boundary. It is not a rotating flow and is used to enhance the mixing effect.
[0050] For example, the casing 100 may be made of alloy or metal.
[0051] The gas mixer of this embodiment includes a shell 100 and a deflection structure 200. The shell 100 has an inner cavity 110, a first inlet 120 for a first gas to enter, a second inlet 130 for a second gas to enter, and an outlet 140. The first inlet 120, the second inlet 130, and the outlet 140 are all connected to the inner cavity 110, so that the first gas and the second gas entering the inner cavity 110 mix to form a preliminary mixed gas when flowing towards the outlet 140. The deflection structure 200 is disposed in the inner cavity 110, and in the flow direction of the first gas or the second gas, the deflection structure 200 is located downstream of the first inlet 120 and the second inlet 130, so that the preliminary mixed gas generates deflection when passing through the deflection structure 200, so that the preliminary mixed gas formed by the mixing of the first gas and the second gas is more fully mixed under the action of the deflection, so as to finally form a mixed gas with better mixing uniformity. This can effectively improve the mixing uniformity of the first gas and the second gas, so as to avoid local concentration differences affecting the reaction efficiency of the denitrification system.
[0052] Reference Figure 1 , Figures 5 to 7 As shown, in some embodiments, the flexural structure 200 includes a connecting body 210 and at least two flexural blades 220 disposed on the connecting body 210.
[0053] The connecting body 210 is connected to the inner cavity 110, and at least two deflection blades 220 are arranged circumferentially along the shell 100. The deflection blades 220 extend in a direction perpendicular to the flow of the first gas or the second gas and are inclined relative to the cross section of the shell 100.
[0054] In a specific implementation, the connecting body 210 is used to connect the deflector blade 220 to the cavity wall of the inner cavity 110. For example, the connecting body 210 and the cavity wall of the inner cavity 110 can be connected by snap-fit, interference fit, or welding.
[0055] Furthermore, by providing at least two deflector blades 220 arranged circumferentially along the casing 100, and the deflector blades 220 extending in a direction perpendicular to the flow of the first gas or the second gas and inclined relative to the cross-section of the casing 100, when the first gas and the second gas pass through the deflector blades 220, the constraint effect of the deflector blades 220 on the first gas and the second gas breaks the original pressure-velocity balance, causing the first gas and the second gas to flow in the mainstream direction (i.e., towards the outlet 140). Figure 1 The straight line (in the direction indicated by the dashed arrow) is forced to deflect laterally or form local vortices, so that the first gas and the second gas are further mixed to form a mixed gas with higher mixing uniformity.
[0056] For example, the deflector blade 220 may be tilted in a direction toward the outlet 140 or in a direction away from the outlet 140.
[0057] For example, the deflector blade 220 can be configured as follows: Figures 5 to 7 The four shown can also be set to two, three, or more than four.
[0058] In some embodiments, the tilt angle of the deflector blade 220 ranges from 30° to 60°.
[0059] By reasonably setting the tilt angle range of the deflector blades 220, the first gas and the second gas can be fully mixed under the action of sufficient lateral deflection or vortex.
[0060] For example, the tilt angle of the deflector blade 220 can be understood as the angle between it and the cross-section of the tube shell 100, which can be 30°, 45° or 60°.
[0061] Reference Figures 5 to 7 As shown, in some embodiments, at least two deflection blades 220 are arranged in a centrally symmetrical manner with respect to the center of the connecting body 210, so that all the deflection blades 220 are evenly spaced along the circumference of the tube shell 100 and have the same outline size. This design not only facilitates processing and manufacturing but also makes the gas mixing uniform.
[0062] Reference Figures 5 to 7 As shown, in some embodiments, the connecting body 210 includes a first connecting blade 211 and a second connecting blade 212. The first connecting blade 211 and the second connecting blade 212 are intersecting and arranged. The outer edges of the first connecting blade 211 and the second connecting blade 212 are both connected to the inner cavity 110, so that the corresponding flexure blade 220 can be connected to the inner cavity 110 through the first connecting blade 211 and the second connecting blade 212 to achieve a reliable connection.
[0063] For example, the connecting body 210 and the deflector blade 220 are integrally formed, which saves manufacturing steps and can improve the structural strength of the entire deflector structure 200.
[0064] Reference Figures 1 to 4 As shown, in some embodiments, the gas mixer further includes a swirling structure 300 located between the first inlet 120 and the second inlet 130 along the flow direction of the first gas or the second gas, such that the first gas flowing into the inner cavity 110 through the first inlet 120 forms a swirling flow when passing through the swirling structure 300.
[0065] In practice, the first gas enters the inner cavity 110 through the first inlet 120 and forms a swirling flow through the swirling structure 300, thereby allowing the first gas to rotate under the action of the swirling flow. This can prolong the mixing time between the first gas and the second gas and improve the mixing efficiency.
[0066] Specifically, swirling refers to the rotation of the first gas around the central axis of the swirling structure 300 as it flows toward the outlet 140, thereby increasing the flow path of the first gas and thus extending the mixing time.
[0067] Reference Figures 1 to 4 As shown, in some embodiments, the swirl structure 300 includes a supporting outer ring 310, a supporting inner ring 320, and at least two swirl blades 330.
[0068] The inner support ring 320 is located within the outer support ring 310, and at least two swirl blades 330 are connected between the outer support ring 310 and the inner support ring 320 and are spaced apart along the circumferential direction of the shell 100; the swirl blades 330 extend parallel to the flow direction of the first gas or the second gas and are inclined relative to the central axis of the shell 100.
[0069] In a specific implementation, the outer support ring 310 and the inner support ring 320 are used to enclose and form an annular space for mounting the swirl blade 330. For example, the outer support ring 310 and the swirl blade 330, as well as the inner support ring 320 and the swirl blade 330, can be welded together or snap-fitted together.
[0070] Furthermore, by providing at least two swirling blades 330 arranged circumferentially along the shell 100, and the swirling blades 330 extending parallel to the flow direction of the first gas or the second gas and inclined relative to the central axis of the shell 100, the swirling blades 330 change the flow direction of the first gas when it passes through the swirling blades 330, and ultimately cause the first gas to rotate about the central axis of the supporting inner ring 320, thereby increasing the flow path or flow time.
[0071] For example, the swirl vane 330 can be configured as follows: Figures 2 to 4 The six shown can also be set to two, three, or more than four.
[0072] In some embodiments, the tilt angle of the swirl blades 330 ranges from 30° to 60°.
[0073] By reasonably setting the tilt angle range of the swirl vane 330, the first gas can rotate when it flows through the swirl vane 330, thus effectively increasing the flow time of the first gas.
[0074] For example, the tilt angle of the swirl blade 330 can be understood as the angle between it and the central axis of the tube shell 100, which can be 30°, 45° or 60°.
[0075] Reference Figures 2 to 4 As shown, in some embodiments, at least two swirl blades 330 are centrally symmetrically arranged with respect to the center of the supporting inner ring 320, so that all the swirl blades 330 are evenly spaced along the circumference of the tube shell 100 and have the same profile size. This design not only facilitates processing and manufacturing but also makes the rotation of the first gas more stable.
[0076] Reference Figures 2 to 4 As shown, in some embodiments, the swirl structure 300 further includes at least two support blades 340, which are disposed on the outer periphery of the support outer ring 310 and spaced apart along the circumferential direction of the support outer ring 310, and all support blades 340 are connected to the inner cavity 110.
[0077] In a specific implementation, at least two support blades 340 are provided to reliably connect the outer support ring 310, the inner support ring 320, and the swirl blades 330 to the inner cavity 110. For example, the support blades 340 and the outer support ring 310 can be welded or snap-fitted together. The support blades 340 and the inner wall of the inner cavity 110 can be interference-fitted or snap-fitted together.
[0078] In addition, by providing at least two support blades 340 on the outer periphery of the outer support ring 310, the structural strength of the outer support ring 310 can also be increased.
[0079] Reference Figure 1 As shown, in some embodiments, the housing 100 includes a length direction along the housing 100 (see reference 100). Figure 1 The first conical shell section 150, the straight shell section 160, and the second conical shell section 170 are sequentially connected and interconnected in the x direction shown; the first inlet 120 is located in the first conical shell section 150, the second inlet 130 is located in the straight shell section 160, and the outlet 140 is located in the second conical shell section 170.
[0080] Along the direction from the first conical shell section 150 to the second conical shell section 170, the inner diameter of the first conical shell section 150 gradually increases, and / or the inner diameter of the second conical shell section 170 gradually decreases.
[0081] In practice, by gradually increasing the inner diameter of the first conical shell section 150, the first gas enters the inner cavity 110 through the first outlet 140. As the inner diameter of the first conical shell section 150 increases, it is beneficial for the diffusion of the first air, thereby forming a stable flow, so as to mix it evenly with the second gas. This also avoids the problem of poor mixing effect caused by the large flow resistance of the first gas.
[0082] In addition, the inner diameter of the second conical shell section 170 gradually decreases, which can increase the flow rate of the mixed gas flowing out through the outlet 140, so as to make the discharge efficiency of the mixed gas higher.
[0083] Reference Figure 1 As shown, in some embodiments, the gas mixer includes a jet pipe 400, at least a portion of which extends into the inner cavity 110 via a second inlet 130. One end of the jet pipe 400 has a jet inlet 410 for a second gas to enter, and the other end of the jet pipe 400 has a jet outlet 420 communicating with the inner cavity 110.
[0084] Along the direction from the injection inlet 410 to the injection outlet 420, the inner diameter of the portion of the injection pipe 400 at least having the injection outlet 420 gradually decreases.
[0085] In practice, by setting the inner diameter of the part of the injection pipe 400 with at least the injection outlet 420 to gradually decrease, the flow rate of the second gas injected into the inner cavity 110 through the injection outlet 420 can be significantly increased, thereby making the first gas and the second gas mix more evenly. This can also avoid the problem of poor mixing effect caused by the large flow resistance of the second gas.
[0086] Reference Figure 1 As shown, in some embodiments, the injection pipe 400 includes a straight pipe 430, a bend 440, and a tapered pipe 450 connected in sequence; the straight pipe 430 is radially connected to the casing 100 (see reference). Figure 1 Extending in the y-direction shown, the tapered tube 450 extends along the length direction of the tube shell 100;
[0087] The injection inlet 410 is located at the end of the straight pipe 430 away from the bend 440, and the injection outlet 420 is located at the end of the tapered pipe 450 away from the bend 440. The inner diameter of the tapered pipe 450 gradually decreases along the direction from the injection inlet 410 to the injection outlet 420, so that the second gas enters the bend 440 through the straight pipe 430, changes its flow direction, and then exits through the tapered pipe 450. This allows the second gas to be injected into the inner cavity 110 at a higher flow rate in the direction toward the outlet 140, thereby improving the mixing uniformity with the first gas.
[0088] For example, the straight tube 430 extends radially along the casing 100, and the tapered tube 450 extends axially or longitudinally along the casing 100 (see reference). Figure 1 As shown in the x-direction, a bend 440 is needed between the straight pipe 430 and the tapered pipe 450 to connect the straight pipe 430 and the tapered pipe 450 with different extension directions.
[0089] For example, the straight pipe 430, the bend 440 and the tapered pipe 450 can be integrally formed to save manufacturing steps while improving the structural strength of the entire jet pipe 400.
[0090] In addition, the injection pipe 400 and the second inlet 130 can be interference-fitted or a sealing ring can be installed for gas sealing.
[0091] In addition, a welding flange 510 and a counter flange 520 corresponding to the welding flange 510 can be provided at both the first conical shell section 150 and the second conical shell section 170. The welding flange 510 and the counter flange 520 are compatible and connected by fasteners 530 to facilitate connection with external pipelines.
[0092] Reference Figures 1 to 7 As shown, this embodiment provides a denitrification system, including a gas mixer.
[0093] The specific structure and implementation principle of the gas mixer in this embodiment are the same as those of the gas mixer provided in the above embodiments, and can bring the same or similar technical effects. They will not be described in detail here, but can be referred to the description of the above embodiments.
[0094] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0095] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A gas mixer, characterized in that, include: A housing (100) having an inner cavity (110), a first inlet (120) for a first gas to enter, a second inlet (130) for a second gas to enter, and an outlet (140), wherein the first inlet (120), the second inlet (130), and the outlet (140) are all in communication with the inner cavity (110) so that the first gas and the second gas entering the inner cavity (110) mix to form a preliminary mixed gas when flowing toward the outlet (140); as well as A turbulent flow structure (200) is disposed within the inner cavity (110), and in the flow direction of the first gas or the second gas, the turbulent flow structure (200) is located downstream of the first inlet (120) and the second inlet (130), so that the preliminary mixed gas generates turbulence when passing through the turbulent flow structure (200), and mixes to form a mixed gas under the action of the turbulence.
2. The gas mixer according to claim 1, characterized in that, The flexure structure (200) includes a connecting body (210) and at least two flexure blades (220) disposed on the connecting body (210); The connecting body (210) is connected to the inner cavity (110), and at least two of the deflection blades (220) are arranged circumferentially along the shell (100). The deflection blades (220) extend in a direction perpendicular to the flow of the first gas or the second gas and are inclined relative to the cross section of the shell (100).
3. The gas mixer according to claim 2, characterized in that, The tilt angle of the deflector blade (220) ranges from 30° to 60°; And / or, at least two of the deflector blades (220) are arranged in a centrally symmetrical manner with respect to the center of the connecting body (210); And / or, the connecting body (210) includes a first connecting blade (211) and a second connecting blade (212), the first connecting blade (211) and the second connecting blade (212) are intersecting and are connected to the inner cavity (110) by the outer edge of the first connecting blade (211) and the outer edge of the second connecting blade (212). And / or, the connecting body (210) and the deflector blade (220) are integrally formed.
4. The gas mixer according to claim 1, characterized in that, The gas mixer further includes a swirling structure (300) located between the first inlet (120) and the second inlet (130) in the flow direction of the first gas or the second gas, such that the first gas flowing into the inner cavity (110) through the first inlet (120) forms a swirling flow when passing through the swirling structure (300).
5. The gas mixer according to claim 4, characterized in that, The swirl structure (300) includes a supporting outer ring (310), a supporting inner ring (320), and at least two swirl blades (330); The inner support ring (320) is disposed within the outer support ring (310), and at least two swirl blades (330) are connected between the outer support ring (310) and the inner support ring (320) and are spaced apart circumferentially along the shell (100); the swirl blades (330) extend parallel to the flow direction of the first gas or the second gas and are inclined relative to the central axis of the shell (100).
6. The gas mixer according to claim 5, characterized in that, The tilt angle of the swirl blade (330) ranges from 30° to 60°; And / or, at least two of the swirl blades (330) are arranged in a centrally symmetrical manner with respect to the center of the inner support ring (320); And / or, the swirl structure (300) further includes at least two support blades (340), which are disposed on the outer periphery of the outer support ring (310) and spaced apart circumferentially along the outer support ring (310), and all the support blades (340) are connected to the inner cavity (110).
7. The gas mixer according to any one of claims 1 to 6, characterized in that, The shell (100) includes a first conical shell section (150), a straight shell section (160), and a second conical shell section (170) that are sequentially connected and communicated along the length of the shell (100); the first inlet (120) is located in the first conical shell section (150), the second inlet (130) is located in the straight shell section (160), and the outlet (140) is located in the second conical shell section (170); Along the direction from the first conical shell section (150) to the second conical shell section (170), the inner diameter of the first conical shell section (150) gradually increases, and / or the inner diameter of the second conical shell section (170) gradually decreases.
8. The gas mixer according to claim 7, characterized in that, The gas mixer includes a jet pipe (400), at least a portion of which extends into the inner cavity (110) through the second inlet (130). One end of the jet pipe (400) has a jet inlet (410) for the second gas to enter, and the other end of the jet pipe (400) has a jet outlet (420) communicating with the inner cavity (110). In the direction from the injection inlet (410) to the injection outlet (420), the inner diameter of the portion of the injection pipe (400) at least having the injection outlet (420) gradually decreases.
9. The gas mixer according to claim 8, characterized in that, The injection pipe (400) includes a straight pipe (430), a bent pipe (440), and a tapered pipe (450) connected in sequence and in communication; the straight pipe (430) extends radially along the pipe shell (100), and the tapered pipe (450) extends longitudinally along the pipe shell (100); The injection inlet (410) is located at the end of the straight pipe (430) away from the bend (440), and the injection outlet (420) is located at the end of the tapered pipe (450) away from the bend (440). The inner diameter of the tapered pipe (450) gradually decreases in the direction from the injection inlet (410) to the injection outlet (420).
10. A denitrification system, characterized in that, Includes the gas mixer according to any one of claims 1 to 9.