Wave blocking device

Abstract

The invention belongs to the technical field of explosion resistance, and particularly relates to a wave blocking device. The wave blocking device comprises a cylindrical side screen, and the diameter of the two axial ends of the side screen is larger than that of the middle of the side screen. The first port screen mesh is arranged at one axial end of the side screen mesh, and the first port screen mesh is configured to be in an arc shape which is sunken towards the inside of the side screen mesh; and the second port screen mesh is arranged at the other axial end of the side screen mesh, and the second port screen mesh is configured to be in an arc shape which is sunken towards the inside of the side screen mesh. The invention is suitable for the gas-phase oxidation process, can be used in a gas-phase oxidation process air transport pipeline and in front of an inlet of a static mixer, has the effect of enhancing gas-phase mixing, has the effect of weakening detonation in the pipeline and shock wave harm in the detonation process, and is small in pressure drop.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of explosion suppression, and in particular relates to a wave blocking device. BACKGROUND

[0002] There are a large number of gas phase oxidation processes in the chemical industry, such as n-butane oxidation process for preparing maleic anhydride, o-xylene catalytic oxidation process for preparing phthalic anhydride, and p-xylene direct oxidation process for preparing p-toluic aldehyde. In the mixing section pipeline of these gas phase oxidation processes, the risk of explosion is high due to the coexistence of air and flammable gas. Once an explosion accident occurs, the shock wave caused by deflagration and detonation will backflow to the upstream along the gas phase conveying pipeline, causing damage to air compressors, heat exchangers and other equipment, and affecting normal process operation. Due to its huge potential to destroy structures, uncontrolled detonation may even trigger major events such as large-scale personnel deaths and environmental pollution.

[0003] Due to the problems of equipment cost and flow pressure drop, etc., special fire and explosion blocking equipment is not usually set before and after the mixing device of the gas phase oxidation process. For example, in the n-butane oxidation process for preparing maleic anhydride, only a check valve is set in the air pipeline for explosion isolation, but the check valve has a long reaction time and poor reliability, and once a fire and explosion risk occurs, it will cause damage to the upstream equipment along the pipeline.

[0004] Chinese patent document CN210521588U discloses a wave absorbing device of a detonation flame arrestor, which causes the backflow of shock waves in the shell to produce a braking effect on the flame shock wave, and the shock wave speed and pressure are offset to each other, so that the detonation shock wave is attenuated. However, the cavity structure of the device is not conducive to the stable flow of the gas in the positive direction, which will affect the gas mixing effect in the downstream mixing section.

[0005] Chinese patent document CN211024887U discloses a non-steady-state detonation flame shock wave blocking device, which causes turbulent flow of shock waves in the inner cavity by the shock wave blocking plate, and the shock wave speed and pressure are offset to each other, so that the non-steady-state detonation shock wave is attenuated, and the impact on the flame arrestor is reduced. The structure of the device is not conducive to the stable flow of the gas in the positive direction, which will affect the gas mixing effect in the downstream mixing section.

[0006] In view of the above, in order to weaken the damage caused by the shock wave in the deflagration and detonation process in the pipeline, the present application provides a wave blocking device with the effect of absorbing explosion shock wave. SUMMARY

[0007] In view of the above technical problems, the present application aims to provide a wave blocking device which is suitable for use in the gas phase oxidation process, can be used in the air conveying pipeline of the gas phase oxidation process and before the inlet of the static mixer, has the effect of strengthening the gas phase mixing, and at the same time has the effect of weakening the damage caused by the shock wave in the deflagration and detonation process in the pipeline, and has a small pressure drop.

[0008] According to the present application, a wave blocking device is provided, comprising:

[0009] a side screen in a cylindrical shape, the diameters of the axial two ends of the side screen being greater than the diameter of the middle part;

[0010] a first port screen arranged at one axial end of the side screen, the first port screen being configured as an arc shape recessed into the side screen; and

[0011] a second port screen arranged at the other axial end of the side screen, the second port screen being configured as an arc shape recessed into the side screen.

[0012] The wave blocking device provided by the present application is configured as a curved mesh structure as a whole, and the mesh is used to cut and break the shock wave, so that the shock wave cannot be superimposed and coupled after passing through the first port screen, the side screen and the second port screen. Meanwhile, the mesh in different directions causes turbulence after the shock wave passes through, and the speed and pressure of the shock wave are gradually reduced due to the friction of the turbulence, so that the explosion shock wave is gradually attenuated. The gas flow speed in the normal production process is relatively low, and the present application will not cause too much pressure drop to the gas in the normal production process. Therefore, the present application can prevent the pipeline and the upstream equipment from being damaged due to the explosion shock without affecting the normal production.

[0013] In a specific embodiment, the side screen is configured as a symmetric arc shape with the diameter gradually increasing from the middle to the axial two ends.

[0014] In a specific embodiment, the first port screen is configured as an axial symmetric structure.

[0015] In a specific embodiment, the second port screen is configured as an axial symmetric structure.

[0016] In a specific embodiment, the overall axial cross section of the side screen, the first port screen and the second port screen is a central symmetric figure.

[0017] In a specific embodiment, the mesh aperture of the side screen, the first port screen and the second port screen is 2-50 mm.

[0018] In a specific embodiment, the porosity of the side screen, the first port screen and the second port screen is 30%-60%.

[0019] In a specific embodiment, the mesh of the side screen, the first port screen and the second port screen adopts straight-line distribution.

[0020] In one specific embodiment, the mesh holes of the side edge screen, the first port screen and the second port screen are arranged in staggered distribution.

[0021] In one specific embodiment, the recess depth of the first port screen is 5% to 25% of its diameter.

[0022] In one specific embodiment, the recess depth of the second port screen is 5% to 30% of its diameter.

[0023] In one specific embodiment, the axial length of the side edge screen is 1 to 3 times of its diameter.

[0024] In one specific embodiment, the recess depth of the side edge screen is 5% to 20% of its maximum diameter.

[0025] Compared with the prior art, the application has the following advantages.

[0026] The application can effectively improve the gas-gas mixing effect through the forced cutting dispersion of the screens in multiple different directions, and the pressure loss after the gas passes through the application is much smaller than that of the conventional static mixer, which can effectively reduce the energy consumption in the production process and effectively inhibit the propagation of the mixed section flame to the upstream.

[0027] The mixing structure used in the prior art has low efficiency and large pressure drop, and cannot inhibit the pressure wave generated by combustion and explosion. The curved screen structure of the application can decouple the shock wave generated by explosion and weaken the damage risk to the upstream equipment. At the same time, the application uses the cutting and crushing effect of the mesh holes on the shock wave, so that the shock wave cannot be superimposed and coupled after passing through the screen, and the mesh holes in different directions produce turbulent flow after the shock wave passes through, so that the speed and pressure of the shock wave are gradually reduced by the friction of the turbulent flow, thereby gradually attenuating the explosion shock wave. The application can prevent the pipeline and upstream equipment from being damaged by explosion shock without affecting normal production. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be described below with reference to the accompanying drawings.

[0029] Figure 1 shows a perspective structural schematic view of one embodiment of the wave blocking device according to the application;

[0030] Figure 2 shows an axial cross-sectional schematic view of one embodiment of the wave blocking device according to the application.

[0031] In the drawings:

[0032] 1, side screen; 2, first port screen; 3, second port screen; 4, mesh; 5, clamping plate; 6, pipe; 10, central axis; 100, wave choke device.

[0033] In the present application, all the drawings are schematic drawings for illustrating the principles of the present application only and are not drawn to scale. DETAILED DESCRIPTION

[0034] The present application will be described below with reference to the drawings.

[0035] It should be noted that the directional terms or limiting terms "left", "right" and the like used in the present application are all relative to the Figure 2 directions of the drawings. They are not used to limit the absolute positions of the parts involved, but can vary according to the specific circumstances.

[0036] The directional terms or limiting terms "axial" used in the present application refer to the direction of extension of the central axis 10, i.e. Figure 2 the left-right direction.

[0037] Figure 1 The structure of the wave choke device 100 according to the present application is shown. As shown in the drawings, the wave choke device comprises a side screen 1, a first port screen 2 and a second port screen 3. Figure 1

[0038] In the present embodiment, the side screen 1 is integrally configured in a substantially cylindrical shape, and the diameters of the axial both ends of the side screen 1 are larger than the diameter of the middle part. Specifically, as shown in the drawings, viewed in the direction of the central axis 10 (i.e. the left-right direction in the drawings), the middle part of the side screen 1 is closer to the central axis 10 than the parts at the left and right ends. Figure 2 Figure 2 In the present embodiment, the wave choke device 100 is arranged in the pipe 6, and the diameters of the axial both ends of the side screen 1 are adapted to the inner wall diameter of the pipe 6, that is, the axial both ends of the side screen 1 are fixedly connected with the pipe 6.

[0039] The first port screen 2 is integrally configured in an arc surface structure, and the first port screen 2 is arranged at the axial left end of the side screen 1 and is recessed into the side screen 1. Specifically, as shown in the drawings, the circumferential edge of the first port screen 2 is adapted to the shape of the left end edge of the side screen 1 and is fixedly connected with each other, that is, the diameter of the first port screen 2 is equal to the inner diameter of the pipe 6 and the outer diameter of the left end of the side screen 1. The middle part (i.e. the part close to the central axis 10) of the first port screen 2 is recessed to the inside of the side screen 1 to the right.

[0040] The first port screen 2 is integrally configured in an arc surface structure, and the first port screen 2 is arranged at the axial left end of the side screen 1 and is recessed into the side screen 1. Specifically, as shown in the drawings, the circumferential edge of the first port screen 2 is adapted to the shape of the left end edge of the side screen 1 and is fixedly connected with each other, that is, the diameter of the first port screen 2 is equal to the inner diameter of the pipe 6 and the outer diameter of the left end of the side screen 1. The middle part (i.e. the part close to the central axis 10) of the first port screen 2 is recessed to the inside of the side screen 1 to the right. Figure 1 Figure 2 ​​​​

[0041] The second-port screen 3 has an overall arc-shaped structure. It is located at the axial right end of the side screen 1 and is recessed inwards from the side screen 1. Specifically, as shown... Figure 1 and Figure 2 As shown, the circumferential edge of the second port screen 3 is adapted to the shape of the right edge of the side screen 1 and is fixedly connected to each other. That is to say, the diameter of the second port screen 3 is equal to the inner diameter of the pipe 6 and the outer diameter of the right end of the side screen 1. The middle part of the second port screen 3 (i.e., the part near the central axis 10) is recessed to the left into the interior of the side screen 1.

[0042] like Figure 2 As shown, under normal operating conditions, the gas flows from left to right within pipe 6. The gas passes sequentially through the first port screen 2, the side screen 1, and the second port screen 3, finally exiting from the right end into the downstream mixing section (not shown). This invention enhances gas-phase mixing and has a low pressure drop, thus avoiding adverse effects on normal operating conditions.

[0043] After the explosion in the downstream mixing section, the shock wave rebounds upstream, passing sequentially through the second port screen 3, the side screen 1, and the first port screen 2. According to aerodynamic principles, the shock wave changes direction at the curved surfaces of the second port screen 3, the side screen 1, and the first port screen 2, while its velocity and pressure drop also decrease. After passing through the mesh 4 of the screens, the direction of the shock wave propagation changes, generating turbulence inside the wave-damping device 100. The shock wave velocity and pressure cancel each other out, further attenuating the explosion shock wave.

[0044] In a specific embodiment, such as Figure 2 As shown, a clamping plate 5 is provided at the right end of the side screen 1. Specifically, the clamping plate 5 has a ring structure and is coaxially disposed at the right end of the side screen 1. The inner diameter of the clamping plate 5 is adapted to and fixedly connected to the right end of the side screen 1. The function of the clamping plate 5 is to connect with other pipes via flanges to prevent the wave-damping device 100 from shifting due to impact.

[0045] In one specific embodiment, the side screen 1 is constructed as a symmetrical arc shape with its diameter gradually increasing from the middle to both axial ends. That is, the side screen 1 is constructed as a left-right symmetrical structure, with the smallest diameter at the axial middle part of the side screen 1.

[0046] In one specific embodiment, the first port screen 2 is constructed with an axisymmetric structure. That is, the first port screen 2 is coaxially disposed at the left end of the side screen 1, and the portion of the first port screen 2 located on the central axis 10 has the greatest rightward indentation.

[0047] In one specific embodiment, the second port screen 3 is constructed with an axisymmetric structure. That is, the second port screen 3 is coaxially disposed at the right end of the side screen 1, and the portion of the second port screen 3 located on the central axis 10 has the largest leftward indentation.

[0048] In a specific embodiment, such as Figure 2 As shown, the overall axial cross-section of the side screen 1, the first port screen 2, and the second port screen 3 is a centrally symmetrical figure.

[0049] In one specific embodiment, the mesh size 4 of the side screen 1, the first port screen 2, and the second port screen 3 is 2-50 mm. Preferably, the mesh size 4 is circular with a diameter of 4-20 mm, which further increases the probability of the mesh size 4 cutting the detonation wave, helps to disperse the detonation wave, and reduces the intensity of the detonation wave.

[0050] According to the present invention, the shape of the mesh 4 can be set to various shapes such as circular or polygonal, and is preferably set to circular. When the mesh 4 is set to a shape other than circular, its equivalent aperture is 2 to 50 mm.

[0051] In one specific embodiment, the porosity of the side screen 1, the first port screen 2, and the second port screen 3 is 30% to 60%.

[0052] In one specific embodiment, the mesh openings 4 of the side screen 1, the first port screen 2, and the second port screen 3 are arranged in a straight line.

[0053] In one specific embodiment, the mesh openings 4 of the side screen 1, the first port screen 2, and the second port screen 3 are staggered.

[0054] In one specific embodiment, the recess depth of the first port screen 2 is 5% to 25% of its diameter. Specifically, the recess depth of the first port screen 2 refers to the axial distance from the leftmost end to the rightmost end of the first port screen 2, and the diameter of the first port screen 2 is equal to the diameters of the left and right ends of the side screen 1 and the inner diameter of the pipe 6.

[0055] In one specific embodiment, the recess depth of the second port screen 3 is 5% to 30% of its diameter. Specifically, the recess depth of the second port screen 3 refers to the axial distance from the leftmost end to the rightmost end of the second port screen 3, and the diameter of the second port screen 3 is equal to the diameters of the left and right ends of the side screen 1 and the inner diameter of the pipe 6. Preferably, the recess depth of the second port screen 3 is 10% to 20% of the diameter of the pipe 6, which helps to improve the impact resistance of the wave-damping device 100 and enhance the effect of the second port screen 3 in reducing shock waves.

[0056] In one specific embodiment, the axial length of the side screen 1 is 1 to 3 times its maximum diameter. Specifically, the axial length of the side screen 1 refers to the axial distance from the leftmost end to the rightmost end of the side screen 1. Preferably, the axial length of the side screen 1 is 1.5 to 2 times its maximum diameter, which can control the pressure drop to a low level while ensuring that the detonation wave stays in the wave-blocking device 100 for a sufficiently long time, and the pressure difference across the wave-blocking device 100 can be reduced to below 80 Pa.

[0057] In one specific embodiment, the recess depth of the side screen 1 is 5% to 20% of its maximum diameter (the diameter of the left or right end of the side screen 1). Specifically, the recess depth of the side screen 1 refers to the difference between the minimum radius and the maximum radius of the side screen.

[0058] Preferably, the recess depth of the side screen 1 is 10% to 15% of its maximum diameter, which helps to reduce the flow dead zone of the wave-blocking device 100 and increases the contact time between the detonation wave and the screen. According to the inventors' experiments, the recess depth of the side screen 1 is not necessarily better the larger it is; setting the recess depth of the side screen 1 within the range of 10% to 15% of its maximum diameter can minimize the intensity of the detonation wave.

[0059] The wave-damping device provided by this invention has a 100% pressure drop and a strong effect in absorbing explosive shock waves. It makes up for the shortcomings of conventional explosion-proof devices, such as large forward flow pressure drop and high equipment cost. It is especially suitable for occasions with high explosion-proof requirements and processes with pressure drop control requirements.

[0060] Compared with traditional explosion-proof devices, the wave-damping device 100 provided by this invention has a simple structure, low product cost, and is easy to install and replace.

[0061] The wave-damping device 100 provided by the present invention has a certain enhanced mixing effect. Through the cutting action of the mesh 4, the flow of gas can be improved, which is beneficial to improving the mixing effect of gas after entering the static mixer.

[0062] Example 1:

[0063] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0064] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0065] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0066] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0067] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0068] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 980 Pa.

[0069] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 56%.

[0070] Example 2:

[0071] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 10 mm, and the porosity is 30%.

[0072] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0073] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0074] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0075] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0076] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 370 Pa.

[0077] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 38% before and after the wave-blocking device 100.

[0078] Example 3:

[0079] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 15 mm, and the porosity is 30%.

[0080] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0081] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0082] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0083] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0084] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 320 Pa.

[0085] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 35% before and after the wave-blocking device 100.

[0086] Example 4:

[0087] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are circular in shape and arranged in a sequential manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0088] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0089] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0090] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0091] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0092] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 980 Pa.

[0093] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 56%.

[0094] Example 5:

[0095] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 60%.

[0096] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0097] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0098] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0099] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0100] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 760 Pa.

[0101] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 40%.

[0102] Example 6:

[0103] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are square in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 75%.

[0104] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0105] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0106] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0107] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0108] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 620 Pa.

[0109] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 36% before and after the wave-blocking device 100.

[0110] Example 7:

[0111] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0112] The depth of the recess in the first port screen 2 is 5% of the inner diameter of the pipe 6.

[0113] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0114] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0115] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0116] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 850 Pa.

[0117] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 50%.

[0118] Example 8:

[0119] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0120] The depth of the recess in the first port screen 2 is 15% of the inner diameter of the pipe 6.

[0121] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0122] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0123] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0124] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 1150 Pa.

[0125] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 59% before and after the wave-blocking device 100.

[0126] Example 9:

[0127] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0128] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0129] The depth of the recess in the second port screen 3 is 10% of the inner diameter of the pipe 6.

[0130] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0131] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0132] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 550 Pa.

[0133] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 43%.

[0134] Example 10:

[0135] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0136] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0137] The depth of the recess in the second port screen 3 is 15% of the inner diameter of the pipe 6.

[0138] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0139] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0140] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 770 Pa.

[0141] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 48%.

[0142] Example 11:

[0143] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0144] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0145] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0146] The recessed depth of the side screen 1 is 20% of the inner diameter of the pipe 6.

[0147] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0148] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 1030 Pa.

[0149] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 57% before and after the wave-blocking device 100.

[0150] Example 12:

[0151] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0152] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0153] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0154] The recessed depth of the side screen 1 is 10% of the inner diameter of the pipe 6.

[0155] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0156] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 740 Pa.

[0157] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 44% before and after the wave-blocking device 100.

[0158] Example 13:

[0159] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0160] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0161] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0162] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0163] The axial length of the side screen 1 is twice the inner diameter of the pipe 6.

[0164] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 490 Pa.

[0165] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 42% before and after the wave-blocking device 100.

[0166] Example 14:

[0167] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0168] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0169] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0170] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0171] The axial length of the side screen 1 is 1 times the inner diameter of the pipe 6.

[0172] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 410 Pa.

[0173] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 39% before and after the wave-blocking device 100.

[0174] Example 15:

[0175] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are triangular in shape and are arranged in a staggered manner. The equivalent aperture of the mesh 4 is set to 2 mm, and the porosity is 30%.

[0176] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0177] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0178] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0179] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0180] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 840 Pa.

[0181] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 50%.

[0182] Example 16:

[0183] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first port screen 2, the second port screen 3, and the side screen 1 are square in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0184] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0185] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0186] The recessed depth of the side screen 1 is 15% of the inner diameter of the pipe 6.

[0187] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0188] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 810 Pa.

[0189] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Pressure was monitored using dynamic pressure sensors at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure was reduced by 47% before and after the wave-blocking device 100.

[0190] Example 17:

[0191] In this embodiment, the structure of the wave-blocking device 100 is roughly as described above. The mesh 4 of the first-port screen 2, the second-port screen 3, and the side screen 1 are circular in shape and are arranged in a staggered manner. The aperture of the mesh 4 is 2 mm, and the porosity is 30%.

[0192] The depth of the recess in the first port screen 2 is 10% of the inner diameter of the pipe 6.

[0193] The depth of the recess in the second port screen 3 is 20% of the inner diameter of the pipe 6.

[0194] The recessed depth of the side screen 1 is 25% of the inner diameter of the pipe 6.

[0195] The axial length of the side screen 1 is 3 times the inner diameter of the pipe 6.

[0196] Under normal operating conditions, the gas in pipe 6 flows from left to right through wave-blocking device 100, and the forward flow pressure drop of wave-blocking device 100 is measured to be 1420 Pa.

[0197] Shock wave absorption experiments were conducted. The wave-blocking device 100 was fixed inside pipe 6, which served as a detonation tube (80 mm inner diameter). The detonation tube was filled with a premixed gas of butane and air. A high-pressure ignition electrode was used to ignite the premixed gas, generating a shock wave that propagated towards the wave-blocking device 100. Dynamic pressure sensors were used to monitor the pressure at the axial front and rear points of the wave-blocking device 100. The experiment showed that the shock wave overpressure before and after the wave-blocking device 100 was reduced by 55%.

[0198] In the description of this invention, it should be understood that the terms "first" and "second" 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0199] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0200] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0201] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wave-blocking device, characterized in that, include: The side screen (1) is configured as a cylinder, wherein the diameter of the two ends of the side screen (1) is larger than the diameter of the middle part; A first port screen (2) is provided at one axial end of the side screen (1), and the first port screen (2) is constructed as an arc shape that is recessed into the side screen (1). as well as A second port screen (3) is provided at the other axial end of the side screen (1), and the second port screen (3) is constructed as an arc shape that is recessed into the side screen (1).

2. The wave-blocking device according to claim 1, characterized in that, The side screen (1) is constructed as a symmetrical arc shape with the diameter gradually increasing from the middle to both ends of the axial direction.

3. The wave-blocking device according to claim 1, characterized in that, The first port screen (2) is constructed as an axisymmetric structure.

4. The wave-blocking device according to claim 1, characterized in that, The second port screen (3) is constructed as an axisymmetric structure.

5. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The overall axial cross-section of the side screen (1), the first port screen (2), and the second port screen (3) is a centrally symmetrical figure.

6. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The mesh size (4) of the side screen (1), the first port screen (2) and the second port screen (3) is 2 to 50 mm.

7. The wave-blocking device according to claim 6, characterized in that, The porosity of the side screen (1), the first port screen (2), and the second port screen (3) is 30% to 60%.

8. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The mesh openings (4) of the side screen (1), the first port screen (2), and the second port screen (3) are arranged in a straight line.

9. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The mesh openings (4) of the side screen (1), the first port screen (2), and the second port screen (3) are staggered.

10. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The depth of the indentation of the first port screen (2) is 5% to 25% of its diameter.

11. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The depth of the indentation of the second port screen (3) is 5% to 30% of its diameter.

12. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The axial length of the side screen (1) is 1 to 3 times its diameter.

13. The wave-blocking device according to any one of claims 1 to 4, characterized in that, The recessed depth of the side screen (1) is 5% to 20% of its maximum diameter.

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