An acoustic field enhanced gas coalescing separation filter

Abstract

The application belongs to the field of gas filters, and specifically discloses a gas coalescing separation filter with enhanced acoustic field, which comprises a filter body, a filter core and a plurality of acoustic wave outputters, wherein: the filter body is provided with an air inlet and an air outlet, and the side wall of the filter body adopts a hollow cylinder wall; the filter core is arranged inside the filter body and connected with the air outlet; each acoustic wave outputter is uniformly fixed inside the hollow cylinder wall and used for emitting acoustic waves and forming a uniform acoustic field inside the filter body, so as to reduce the speed of plugging of the internal pores of the filter core. By forming a uniform acoustic field inside the filter body, the application can make the pollutant particles in the gas deflect towards the stationary particles deposited on the surface of the filter core when the pollutant particles approach the filter core, instead of towards the gaps between the stationary particles, thereby effectively reducing the speed of plugging of the internal pores of the filter core, so as to ensure the filtering efficiency while having a lower pressure loss.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gas filters, and more particularly relates to a gas coalescing separation filter with enhanced acoustic field. BACKGROUND

[0002] Air, natural gas and other gases are key raw materials for devices such as gas turbines, and the cleanliness thereof is crucial for reliable operation of the devices, and how to achieve high-efficiency and low-pressure-loss filtration is a key point and difficulty of research.

[0003] When filtering gas, it is necessary to not only ensure high filtration efficiency to meet the cleanliness requirements of the gas, but also reduce pressure loss to reduce the power consumption of power equipment. In the use of traditional gas coalescing separation filters, with the passage of time, pollutant particles continuously accumulate between the surface and the internal fiber pores of the filter element, and the resistance of the gas passing through the filter element will become larger and larger, and when the alarm differential pressure is reached, the filter element needs to be replaced. Replacing the filter element requires steps such as shutdown, nitrogen replacement, disassembly and assembly of the filter element, air replacement, leakage test, and restart, which is time-consuming and labor-intensive, and costly. In particular, for filter elements with high filtration efficiency, the pressure resistance will rise sharply over time, requiring more power from downstream power equipment to maintain operation, and the replacement cycle of the filter element also needs to be shortened, greatly increasing the use cost of the equipment.

[0004] The existing technology mainly focuses on improving the material and structure of the filter element, but high filtration efficiency and low pressure loss have always been a pair of contradictory indicators. As the filtration efficiency requirement increases, the internal pores of the filter element need to be smaller, increasing the resistance of the airflow passing through the filter element, and the pressure loss of the filter element increases, and the internal pores of the filter element are more easily blocked by the filtered pollutant particles, resulting in a significant decrease in the service life of the filter element. SUMMARY

[0005] In view of the defects or improvement needs of the prior art, the present application provides a gas coalescing separation filter with enhanced acoustic field, which aims to solve the problems of rapid pressure resistance rise and low service life of the filter element in the existing gas coalescing separation filter.

[0006] The gas coalescing separation filter with enhanced acoustic field provided by the present application specifically comprises a filter main body, a filter element and a plurality of sound wave outputters, wherein: the filter main body is provided with an air inlet and an air outlet, and the side wall of the filter main body adopts a hollow cylinder wall; the filter element is arranged inside the filter main body and connected with the air outlet; each sound wave outputter is uniformly arranged inside the hollow cylinder wall and used for emitting sound waves and forming a uniform acoustic field inside the filter main body to reduce the speed of plugging of the internal pores of the filter element.

[0007] Compared with the prior art, the application can reduce the speed of plugging the internal pores of the filter element, thereby reducing the pressure drop of the gas passing through the filter element, and achieving the effect of low pressure loss while ensuring the filtering efficiency.

[0008] As a further preferred, the hollow cylinder wall comprises an outer wall and an inner wall, the inner side of the outer wall is coated with a sound wave reflection coating, and the outer side of the inner wall is fixed with a sound wave output device.

[0009] As a further preferred, the number of the sound wave output devices is 12-20.

[0010] As a further preferred, the distance between adjacent sound wave output devices is 200-400mm.

[0011] As a further preferred, the sound field frequency of the uniform sound field is 50-100Hz, and the sound field intensity is 125-130dB(A).

[0012] As a further preferred, the sound wave reflection coating is made of nano ceramic, nano PTFE or nano aluminum oxide.

[0013] As a further preferred, the inside of the filter body is provided with a baffle, the baffle comprises an inclined part and a vertical part, one end of the inclined part is fixed on the hollow cylinder wall, the other end is connected with the vertical part, and the inclined part is opposite to the air inlet to perform inertial filtration on large particle impurities in the entering gas.

[0014] As a further preferred, the bottom of the filter body is provided with an inspection opening.

[0015] As a further preferred, the sidewall of the filter body is provided with a diffusion pipe, one end of the diffusion pipe penetrates the hollow cylinder wall and extends into the inside of the filter body, and the other end is placed in the external environment.

[0016] As a further preferred, the top of the filter body is designed as an opening for replacing the filter element.

[0017] Overall, compared with the prior art, the above technical scheme conceived by the application mainly has the following technical advantages:

[0018] 1.The application can emit sound waves to form a uniform sound field inside the filter body by setting the side wall of the filter body as a hollow cylinder wall and setting a sound wave output device inside it, so that the pollutant particles in the gas are deflected towards the stationary particles that have been deposited on the surface of the filter element when they approach the filter element, rather than towards the gaps between the stationary particles, thereby effectively reducing the speed at which the pores inside the filter element are blocked, reducing the pressure drop of the gas flow through the filter element, thereby ensuring a lower pressure loss while maintaining the filtering efficiency, and increasing the service life of the filter element by about 5 to 10 times.

[0019] 2.At the same time, the application can prevent sound waves from propagating to the external environment by coating a sound wave reflection coating on the inside of the outer wall of the hollow cylinder wall and fixing the sound wave output device on the outside of the inner wall of the hollow cylinder wall, thereby reducing sound wave energy loss and reducing the impact on the environment.

[0020] 3.In particular, the application optimizes the number, arrangement position and parameters of the uniform sound field of the sound wave output device, which can significantly reduce the speed at which the filter element is blocked with lower sound wave power consumption. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front view of the sound field enhanced gas coalescing separation filter provided by the embodiments of the application.

[0022] Figure 2 is Figure 1 A-A sectional view.

[0023] Figure 3 is a perspective view of the sound field enhanced gas coalescing separation filter provided by the embodiments of the application.

[0024] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein:

[0025] 1-filter body, 2-hollow cylinder wall, 3-sound wave output device, 4-sound wave reflection coating, 5-filter element, 6-inlet, 7-outlet, 8-access hole, 9-baffle, 10-diffusion pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the application clearer, the application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0027] As Figures 1 to 3As shown, the application provides a sound field enhanced gas coalescing separation filter, which specifically comprises a filter body 1, a filter element 5 and a plurality of sound wave outputters 3, wherein: the filter body 1 is provided with an air inlet 6 and an air outlet 7 for passing in the gas to be filtered and discharging the filtered gas respectively, the side wall of the filter body 1 adopts a hollow cylinder wall 2, the hollow cylinder wall 2 is a hollow sandwich structure and is divided into an inner wall and an outer wall, the hollow cylinder wall 2 is designed according to the pressure vessel standard, and the wall thickness and material can be adjusted according to the design pressure and temperature; the filter element 5 is arranged in the inside of the filter body 1 and connected with the air outlet 7, and when working, the gas to be filtered passes through the filter element 5 from the outside, so that the pollutant particles in the gas are intercepted by the filter element 5 to obtain the filtered gas, and the filtered gas is discharged from the air outlet 7; each sound wave outputter 3 is uniformly arranged in the inside of the hollow cylinder wall 2, used for emitting sound waves and forming a uniform sound field in the inside of the filter body 1 after the reflection of the sound waves by the sound wave reflection coating 4, the stationary particles deposited on the surface of the filter element 5 cause secondary flow under the action of the uniform sound field, the secondary flow makes the approaching pollutant particles turn towards the stationary particles instead of the gap between the stationary particles, so that the pollutant particles are concentrated in one position, the speed of the internal pores of the filter element 5 being blocked is effectively reduced, thereby the pressure drop of the gas flow through the filter element is reduced, and the problems of rapid pressure resistance rise and low service life of the filter element are effectively solved. 。

[0028] Through the above technical scheme conceived by the application, compared with the prior art, since the application utilizes the sound wave outputters to form a uniform sound field in the inside of the filter body 1, the speed of the internal pores of the filter element being blocked can be reduced, thereby the pressure drop of the gas flow through the filter element is reduced, and the effect of low pressure loss is realized while the filtering efficiency is ensured.

[0029] Further, the outer side of the inner wall of the hollow cylinder wall 2 is coated with a sound wave reflection coating 4, and the outer side of the inner wall of the hollow cylinder wall 2 is fixed with a sound wave outputter 3, when working, the sound waves emitted by the sound wave outputter 3 are reflected by the sound wave reflection coating 4 and then form a uniform sound field in the inside of the filter body 1, which can prevent the sound waves from propagating to the external environment, thereby reducing the sound wave energy loss and reducing the impact on the environment.

[0030] Further, the number of sound wave outputters 3 is 12-20, and the spacing between adjacent sound wave outputters 3 is 200-400 mm. Thus, under the premise of ensuring the sound field intensity, reducing the number of sound wave outputters 3 and appropriately increasing the spacing between adjacent sound wave outputters 3 can reduce the power consumption for maintaining the sound field intensity.

[0031] Further, when the sound field frequency of the uniform sound field is 50-100 Hz and the sound field intensity is 125-130 dB(A), the time for the filter element being blocked is greatly delayed, and under the condition of meeting the specified high filtering efficiency and low pressure loss, the service life of the filter element can be increased by about 5-10 times.

[0032] Further, the sound wave reflection coating 4 is made of a material with high reflection cross-sectional area and low dissipation coefficient, preferably nano ceramic, nano PTFE or nano alumina, and is prepared by coating the nano ceramic, nano PTFE or nano alumina on the inner side of the outer wall of the hollow cylinder wall 2 by high-temperature melt spraying process to form a dense reflection layer.

[0033] Further, the inside of the filter body 1 is provided with a baffle 9, which includes an inclined part and a vertical part, one end of the inclined part is fixed on the hollow cylinder wall 2, and the other end is connected with the vertical part, and at the same time, the inclined part is opposite to the air inlet 6 to inertially filter large particle impurities in the entering gas. At the same time, the bottom of the filter body 1 is provided with an inspection hole 8 for cleaning the bottom debris including large particle impurities filtered by inertia.

[0034] Further, the sidewall of the filter body 1 is provided with a diffusion pipe 10, one end of the diffusion pipe 10 penetrates through the hollow cylinder wall 2 and extends into the inside of the filter body 1, and the other end is placed in the external environment for discharging air in the inside of the filter body 1.

[0035] Further, the top of the filter body 1 is designed as an opening, when the pressure resistance of the filter core 5 rises to the upper limit, the top of the filter body 1 can be opened and the filter core 5 can be replaced.

[0036] It should be understood that the expressions such as "include" and "may include" used in the present application mean the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In the present application, terms such as "include" and / or "have" can be interpreted to mean that a specific feature, number, operation, constituent element, component or combination thereof is present, but cannot be interpreted to exclude the possibility of existence or addition of one or more other features, numbers, operations, constituent elements, components or combinations thereof.

[0037] It should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, the terms "first", "second", etc. are used only for the purpose of description and do not imply or imply relative importance or imply the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Those skilled in the art will readily understand that the above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An acoustic field enhanced gas coalescing separation filter, characterized by, The gas coalescence separation filter comprises a filter body (1), a filter core (5) and a plurality of acoustic wave output devices (3), wherein: the filter body (1) is provided with an air inlet (6) and an air outlet (7), the side wall of the filter body (1) is a hollow cylinder wall (2), the hollow cylinder wall (2) comprises an outer wall and an inner wall, the inner side of the outer wall is coated with an acoustic wave reflection coating (4), and the outer side of the inner wall is fixed with the acoustic wave output device (3); the filter core (5) is arranged in the inside of the filter body (1) and connected with the air outlet (7); each acoustic wave output device (3) is arranged in the inside of the hollow cylinder wall (2) and used for emitting acoustic waves and forming a uniform acoustic field in the inside of the filter body (1), so as to reduce the speed of the blockage of the pores in the filter core (5).

2. The gas coalescing separation filter of claim 1, wherein, The number of the acoustic wave output devices (3) is 12-20.

3. The gas coalescing separation filter of claim 1, wherein, The interval between adjacent acoustic wave output devices (3) is 200-400 mm.

4. The gas coalescing separation filter of claim 1, wherein, The acoustic field frequency of the uniform acoustic field is 50-100 Hz, and the acoustic field intensity is 125-130 dB(A).

5. The gas coalescing separation filter of claim 1, wherein, The acoustic wave reflection coating (4) is made of nano ceramic, nano PTFE or nano alumina.

6. The gas coalescing separation filter of claim 1, wherein, The inside of the filter body (1) is provided with a baffle (9), the baffle (9) comprises an inclined part and a vertical part, one end of the inclined part is fixed on the hollow cylinder wall (2), the other end is connected with the vertical part, and the inclined part faces the air inlet (6), so as to inertially filter large-particle impurities in the entering gas.

7. The gas coalescing separation filter of claim 1 wherein, The bottom of the filter body (1) is provided with an inspection opening (8).

8. The gas coalescing separation filter of claim 1 wherein, The side wall of the filter body (1) is provided with a diffusion pipe (10), one end of the diffusion pipe (10) penetrates through the hollow cylinder wall (2) and extends into the inside of the filter body (1), and the other end is arranged in the external environment.

9. The gas coalescer separation filter of any of claims 1-8, wherein, The top of the filter body (1) is designed as an opening, which is used for replacing the filter core (5).

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