Combined type pipeline filtering silencer

Abstract

The invention belongs to the field of chemical discharge silencers, and particularly relates to a composite pipeline filter silencer which comprises an upper shell, a lower shell is fixedly connected to the bottom of the upper shell, a centrifugal water condensation part is arranged in the lower shell, a partition plate is fixedly connected to the splicing position of the upper shell and the lower shell, and a silencing cylinder is fixedly connected to the center of the partition plate. A silencer air stabilizing exhaust hood is fixedly connected to the position, located above the silencing barrel, in the lower shell, the silencing barrel is communicated and connected with the centrifugal water condensation component, the silencing barrel and the silencer air stabilizing exhaust hood are of a porous structure, a grating plate is fixedly connected to the position, located above the silencer air stabilizing exhaust hood, in the lower shell, and a set of laminated silencing layers are arranged above the grating plate. The water in the waste gas can be effectively separated through the centrifugal water condensing part, the effect of effectively reducing noise is achieved, meanwhile, the temperature of the waste gas is reduced, water molecules are conveniently separated out, and the influence of high temperature and vibration on the service life of the device is avoided.

Description

Technical Field

[0001] This invention belongs to the field of chemical emission silencers, specifically a composite pipeline filter silencer. Background Technology

[0002] Currently, the high-density pipeline steam venting silencers used in thermal boilers of power plants, petrochemical plants, pharmaceutical plants, etc., generally release chemically treated water vapor directly into the atmosphere through the silencer, causing large-scale air pollution. Under normal circumstances, one silencer is usually configured for each steam venting pipeline. Due to the intermittent discharge characteristics of the steam pipeline, the equipment capacity is wasted and the condensate cannot be recovered.

[0003] A steam-water separation type energy-saving steam venting silencer, such as CN217843829U, includes a shell, a baffle plate fixed inside the shell, an anti-impact swirl plate at the lower part of the baffle plate, a throttling pipe at the upper part of the baffle plate, a diffuser fixed at the upper part of the baffle plate, a condensate outlet pipe at the bottom end cap of the shell outside the diffuser pipe, a lower sound-absorbing screen on the shell outside the diffuser pipe, and a steam inlet pipe at the lower part of the shell. The steam inlet pipe is arranged tangentially along the shell. Steam enters the anti-impact swirl plate through the tangential steam inlet pipe. Under the action of centrifugal force generated by high-speed swirl, flash evaporation is achieved to separate steam and water, improving the recovery and utilization of condensate, and significantly reducing the number of silencers used. It has the advantages of high integration, low air pollution, significant noise reduction effect, and safe and reliable performance.

[0004] However, the aforementioned patents still have the following drawbacks: 1. When high-temperature exhaust gas enters the above-mentioned patent, it is in a high-temperature and high-pressure state. Water vapor is not easy to be released under high temperature conditions. Therefore, the amount of water vapor that can be released by centrifugation alone is limited, resulting in low condensate recovery rate, waste of resources, and failure to meet the requirements of green environmental protection.

[0005] 2. The above-mentioned patent cannot cool down the high-temperature exhaust gas, which means that the venting silencer is prone to damage due to long-term exposure to high temperatures during operation, thus affecting its service life.

[0006] 3. When the above-mentioned patent is in operation, high-speed exhaust gas enters its swirl plate. The impact of the high-speed airflow on the swirl plate will cause vibration and noise. Long-term strong vibration can easily damage the silencer and affect its service life.

[0007] 4. The above-mentioned patent causes condensate to flow to the drain outlet by gravity, which may cause some exhaust gas to leak from the drain outlet during drainage. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention addresses the technical problem by incorporating a spiral-shaped air passage. This passage guides the exhaust gas into a high-speed flow, generating centrifugal force that separates and precipitates water vapor from the exhaust gas, thus achieving the separation and recovery of moisture. A U-shaped water storage chamber stores the precipitated water and forms a water seal, effectively preventing downward leakage of exhaust gas. An elastic sealing ring seals the edge gaps of the cover plate, effectively preventing upward leakage of exhaust gas. Furthermore, the corrugated section and elastic sealing ring absorb the vibration energy of the centrifugal disc during vibration. This system achieves vibration reduction and noise reduction, ensuring the noise reduction effect of the device and reducing the damage caused by long-term vibration, thus extending its service life. By setting up a mixing pipe, when the exhaust gas flows through the volute at high speed, Bernoulli's principle is used to continuously draw in low-temperature outside air into the volute and mix it with the high-temperature exhaust gas. This absorbs heat and lowers the temperature of the volute, facilitating the condensation and precipitation of gaseous water molecules in the high-temperature exhaust gas during centrifugation. By pre-mixing low-temperature air to cool the exhaust gas, the system effectively avoids the problem of the continuous high temperature during long-term operation, which could cause aging or damage to other components of the device, thereby extending its service life.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a composite pipeline filter silencer, comprising: An upper shell, the bottom of which is fixedly connected to a lower shell, and a centrifugal condensate component is provided inside the lower shell; A partition is fixedly connected at the joint of the upper and lower shells, a silencer is fixedly connected at the center of the partition, and a silencer stabilizing exhaust hood is fixedly connected inside the lower shell above the silencer. The silencer cylinder is connected to the centrifugal condensate component. The silencer cylinder and the silencer gas stabilizing exhaust hood have a porous structure. A grid plate is fixedly connected inside the lower housing above the silencer gas stabilizing exhaust hood. A set of stacked sound-absorbing layers is provided above the grid plate.

[0010] Furthermore, a set of support rods is fixedly connected to the top edge of the upper shell, and a rain cap that covers the top of the upper shell is fixedly connected to the top of the support rods.

[0011] Furthermore, the centrifugal condensation component includes a water storage box, which is fixedly connected inside the lower housing. A centrifugal disc is fixedly connected to the water storage box. Two spiral-shaped baffles are provided on the upper surface of the centrifugal disc. A cover plate that is tightly fastened to the top of the spiral-shaped baffles is fixedly connected above the spiral-shaped baffles. Two spiral-shaped air passages are formed between the cover plate, the centrifugal disc, and the spiral-shaped baffles. An air inlet pipe is provided on the outer side of the lower housing at the position corresponding to the opening of each spiral-shaped air passage.

[0012] Furthermore, the edge of the centrifuge disc extends into the water storage box without contacting the inner wall of the water storage box, forming a U-shaped water storage cavity. The space inside the lower shell located below the water storage box and the centrifuge disc is a drainage cavity. A drain outlet pipe connected to the drainage cavity is fixedly installed at the bottom of the lower shell. The drainage cavity is connected to the water storage cavity.

[0013] Furthermore, the upper surface of the centrifugal disc is conical, and the spiral air passage gradually spirals upward from the edge to the center.

[0014] Furthermore, the water storage box is provided with a corrugated part for connecting with the centrifugal disc, and an elastic sealing ring is fixedly connected to the edge of the cover plate. The outer periphery of the elastic sealing ring is tightly fitted with the inner wall of the lower shell, and the silencer and the cover plate are flexibly connected by a connecting hose.

[0015] Furthermore, a mixing pipe is fixedly connected to the inlet edge of each spiral air passage on the cover plate. The bottom end of each mixing pipe faces the same direction as the flow of exhaust gas in the spiral air passage, and a one-way valve is connected to the top end of each mixing pipe.

[0016] Furthermore, the space between the partition and the cover plate inside the lower housing is an air cavity, and multiple porous filter plates are evenly distributed on the side wall of the lower housing.

[0017] Furthermore, a transparent observation window is provided on the side wall of the lower housing at the position corresponding to the water storage box, and a water inlet pipe communicating with the interior of the lower housing is provided on the side wall of the lower housing above the observation window.

[0018] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a spiral air passage, the exhaust gas is guided to flow at high speed when it enters the relatively closed spiral air passage, thereby generating centrifugal force to separate and precipitate the water vapor in the exhaust gas, thus achieving the function of separating and recovering the water in the exhaust gas. The relatively closed spiral air passage, compared with the circular chamber used in the prior art, can make the centrifugal effect more obvious and improve the centrifugal separation effect of water vapor.

[0019] (2) The U-shaped water storage chamber can store the precipitated water and form a water seal in the water storage chamber, effectively blocking the downward leakage of waste gas. The elastic sealing ring seals the gaps at the edge of the cover plate, thereby effectively preventing the upward leakage of waste gas. The combined effect of the sealing effect of the elastic sealing ring and the water storage chamber forces the waste gas to be discharged only after centrifugation through the spiral air passage, thereby improving the recovery efficiency of water in the waste gas.

[0020] (3) By setting the corrugated part and the elastic sealing ring, the deformation of the corrugated part and the elastic sealing ring can absorb the vibration energy of the centrifugal disk when the centrifugal disk vibrates, thereby reducing vibration and noise, ensuring the noise reduction effect of the device, reducing the damage caused by long-term vibration, and improving the service life.

[0021] (4) By setting up a mixing pipe, when the exhaust gas flows through the volute at high speed, the Bernoulli principle is used to continuously draw the low-temperature air from the outside into the volute and mix it with the high-temperature exhaust gas. This absorbs heat and reduces the temperature of the volute, which facilitates the condensation and precipitation of gaseous water molecules in the high-temperature exhaust gas during centrifugation, thereby improving the water vapor separation effect.

[0022] (5) By pre-mixing low-temperature air to cool the exhaust gas, the high temperature that is difficult to dissipate during long-term operation of this device is effectively avoided, which may cause aging or damage to other components of this device due to high temperature, thereby improving the service life of this device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present patent.

[0024] Figure 2 This is a side view of the present patent.

[0025] Figure 3 for Figure 2 A three-dimensional sectional view at point AA.

[0026] Figure 4 for Figure 3 A magnified view of a section at point B.

[0027] Figure 5 This is a schematic diagram of the internal structure of this patent.

[0028] Figure 6 for Figure 5 A magnified view of a section at point C.

[0029] Figure 7 This is a schematic diagram of the centrifugal condensate component.

[0030] Figure 8 This is a top view of the centrifugal condensate unit.

[0031] Explanation of reference numerals in the attached drawings: Upper shell 10; Lower shell 11; Rain cap 12; Support rod 13; Support lug 14; Air inlet connector 15; Drain outlet connector 16; Drainage chamber 17; Water storage box 18; Corrugated part 19; Water storage chamber 20; Centrifugal disc 21; Spiral baffle 22; Spiral air passage 23; Cover plate 24; Elastic sealing ring 25; Mixing air pipe 26; One-way valve 27; Air chamber 28; Filter plate 29; Baffle 30; Silencer cylinder 31; Connecting hose 32; Silencer stabilizing exhaust hood 33; Stacked sound-absorbing layer 34; Grille plate 35; Observation window 36; Water inlet connector 37. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figure 1-8 As shown, a composite pipeline filter silencer includes an upper housing 10, a lower housing 11 fixedly connected to the bottom of the upper housing 10, a water storage box 18 fixedly connected inside the lower housing 11, a centrifugal disc 21 fixedly connected to the water storage box 18, two spiral baffles 22 evenly distributed on the upper surface of the centrifugal disc 21, a cover plate 24 tightly fastened to the top of the spiral baffles 22, two spiral air passages 23 formed between the centrifugal disc 21, the spiral baffles 22 and the cover plate 24, the cover plate 24 is through the center, the opening of the spiral air passage 23 is located at the edge of the centrifugal disc 21, the spiral air passages 23 converge towards the center of the centrifugal disc 21 and finally communicate with the through point of the center of the cover plate 24, and a through air inlet pipe 15 is provided on the side wall of the lower housing 11 at the corresponding position of the edge opening of each spiral air passage 23.

[0034] By setting up a spiral-shaped air passage 23, when the exhaust gas enters the relatively closed spiral-shaped air passage 23, it is guided by the spiral-shaped air passage 23 to flow at high speed, thereby generating centrifugal force to separate and precipitate the water vapor in the exhaust gas, thus achieving the function of separating and recovering moisture in the exhaust gas. Compared with the circular chamber used in the prior art, the relatively closed spiral-shaped air passage 23 can make the centrifugal effect more obvious and improve the centrifugal separation effect of water vapor.

[0035] like Figure 1-8As shown, the edge of the centrifuge disc 21 extends downward and into the water storage box 18, and the edge of the centrifuge disc 21 does not contact the inner wall of the water storage box 18, thus forming a U-shaped water storage cavity 20 inside the water storage box 18. The space inside the lower shell 11 below the centrifuge disc 21 and the water storage box 18 is a drain cavity 17, which is connected to the water storage cavity 20. The bottom end of the lower shell 11 is provided with a drain outlet pipe 16 that is connected to the water storage cavity 20. The upper surface of the centrifuge disc 21 is conical, and the spiral air passage 23 gradually spirals upward from the edge to the center. A transparent observation window 36 is provided on the side wall of the lower shell 11 at the corresponding position of the water storage box 18. Above the observation window 36 on the side wall of the lower shell 11, a water inlet pipe 37 that is connected to the interior of the lower shell 11 is provided. A sealing plug is provided at the end of the water inlet pipe 37.

[0036] The U-shaped water storage chamber 20 can store the precipitated water and form a water seal in the water storage chamber 20, effectively blocking the downward leakage of exhaust gas. During the operation, the water level in the water storage chamber 20 gradually rises until it overflows from the edge of the water storage box 18. The overflowing water enters the drain chamber 17 and is finally discharged and collected through the drain outlet pipe 16. The centrifugal disc 21 with a conical surface can facilitate the condensate to flow into the annular water storage box 18 by gravity, avoiding the condensate residue in the spiral air passage 23.

[0037] Sufficient water needs to be retained to form a seal in the water storage chamber 20. If there is no water in the water storage chamber 20 when the device is first installed, or if the water in the water storage chamber 20 may evaporate completely when the device has not been used for a long time, a seal cannot be formed. By setting an observation window 36, the operator can directly observe the water level and volume in the water storage chamber 20 during the initial installation or periodic inspection, and can replenish water into the water storage chamber 20 through the water inlet pipe 37 to ensure the sealing effect.

[0038] like Figure 1-8 As shown, the water storage box 18 is provided with a corrugated part 19 for connecting with the centrifugal disc 21. In this embodiment, the water storage box 18 is preferably made of elastic metal material. An elastic sealing ring 25 is fixedly connected to the edge of the cover plate 24, and the edge of the elastic sealing ring 25 is tightly fitted to the inner wall of the lower shell 11.

[0039] When the high-speed exhaust gas flows through the volute 23, it inevitably impacts the volute 23, causing the centrifugal disc 21 to vibrate, collide, or resonate, thus generating noise. By setting the corrugated part 19 and the elastic sealing ring 25, the deformation of the corrugated part 19 and the elastic sealing ring 25 absorbs the vibration energy of the centrifugal disc 21 when it vibrates, thereby reducing vibration and noise, and ensuring the noise reduction effect of this device.

[0040] Meanwhile, the elastic sealing ring 25 can absorb vibration energy, reduce vibration and noise, and seal the edge gap of the cover plate 24, thereby effectively preventing the exhaust gas from leaking upward. Together with the sealing effect of the water storage chamber 20, it forces the exhaust gas to be centrifuged through the spiral air passage 23 before it can continue to be discharged, thereby improving the recovery efficiency of moisture in the exhaust gas.

[0041] like Figure 1-8 As shown, a mixing pipe 26 is fixedly connected to the inlet edge of each spiral air passage 23 on the cover plate 24. The bottom end of each mixing pipe 26 faces the same direction as the flow of exhaust gas in the spiral air passage 23. A one-way valve 27 is connected to the top end of each mixing pipe 26. The space between the partition plate 30 and the cover plate 24 in the lower housing 11 is an air cavity 28. The one-way valve 27 is connected to the air cavity 28. Multiple porous filter plates 29 are evenly distributed on the side wall of the lower housing 11.

[0042] Since the exhaust gas entering the spiral air passage 23 is usually at a high temperature, and the water vapor in the exhaust gas is difficult to precipitate under high temperature, it is not conducive to water vapor separation and recovery. However, by setting up the mixing pipe 26, when the exhaust gas flows through the spiral air passage 23 at high speed, the Bernoulli principle is used to continuously draw low-temperature air from the outside into the spiral air passage 23 to mix with the high-temperature exhaust gas, absorb heat, and thus reduce the temperature of the spiral air passage 23. This facilitates the condensation and precipitation of gaseous water molecules in the high-temperature exhaust gas during the centrifugation process, thereby improving the water vapor separation effect.

[0043] Furthermore, by pre-mixing low-temperature air to cool the exhaust gas, the high temperature that is difficult to dissipate during long-term operation of this device is effectively avoided, which would cause aging or damage to other components of the device, thereby improving the service life of the device.

[0044] At the same time, pre-mixing with outside air can dilute the exhaust gas. Even if there are small amounts of harmful substances remaining in the exhaust gas, their concentration will decrease at the moment of emission, thus avoiding adverse consequences.

[0045] like Figure 1-8 As shown, a partition 30 is fixedly connected at the joint of the upper shell 10 and the lower shell 11. A silencer 31 is fixedly connected at the center of the partition 30. The bottom end of the silencer 31 is flexibly connected to the top end of the cover plate 24 through a connecting hose 32. A conical silencer stabilizing exhaust hood 33 is fixedly connected inside the upper shell 10 above the silencer 31. Both the silencer 31 and the silencer stabilizing exhaust hood 33 have a fine porous structure. A grid plate 35 is fixedly connected inside the upper shell 10 above the silencer stabilizing exhaust hood 33. Multiple sheet-like stacked sound-absorbing layers 34 are evenly distributed above the grid plate 35 inside the upper shell 10. Each stacked sound-absorbing layer 34 is vertically arranged.

[0046] By setting the silencer 31, an effective noise reduction effect can be achieved, and the silencer 31 can also play a certain filtering role. At the same time, the silencer stabilizing exhaust cover 33 stabilizes the airflow diffusion state, thereby reducing the noise generated by the airflow. Furthermore, the stacked sound-absorbing layer 34 can absorb the noise generated by the airflow again, achieving an effective and stable noise reduction effect.

[0047] like Figure 1-8 As shown, the top opening of the upper shell 10 is open to the atmosphere. Multiple support rods 13 are fixedly connected to the top edge of the upper shell 10 in a circumferential direction. A rain cap 12 covering the top opening of the upper shell 10 is fixedly connected to the top of the support rods 13. Multiple lugs 14 are fixedly connected to the outer wall of the upper shell 10 in a circumferential direction.

[0048] In this embodiment, initially, the device is installed in the designated location according to the working requirements. The air inlet pipe 15 is connected to the exhaust gas discharge pipe, and the drain pipe 16 is connected to the condensate recovery pipe. The operator opens the water inlet pipe 37 in advance and injects enough clean water into the water storage chamber 20 until the water level in the water storage chamber 20 meets the sealing requirements. Then the water inlet pipe 37 is sealed to complete the installation and preparation work.

[0049] During operation, high-temperature exhaust gas flows into the space where the centrifugal disc 21 is located through the air inlet pipe 15. Due to the sealing effect of the elastic sealing ring 25 and the water seal in the water storage chamber 20, the exhaust gas is forced to flow into the relatively closed spiral air passage 23. Since the spiral air passage 23 is relatively closed and has a small cross-sectional area, the flow velocity of the high-temperature airflow increases in the spiral air passage 23. The high-temperature exhaust gas generates centrifugal force by flowing along the spiral air passage 23. The centrifugal force can be used to centrifuge and separate the water in the exhaust gas.

[0050] The separated water slides outwards along the conical surface of the centrifugal disc 21 and eventually falls into the water storage chamber 20. As time goes by, the liquid level in the water storage chamber 20 gradually rises until it exceeds the edge of the water storage box 18 and overflows. The overflowing water falls into the drain chamber 17, gathers towards the center, and is finally discharged from the drain outlet pipe 16.

[0051] During the rapid flow of high-temperature exhaust gas within the volute 23, the Bernoulli principle is used to draw in low-temperature outside air into the volute 23, thereby absorbing heat and cooling the high-temperature exhaust gas. This facilitates the separation of water from the exhaust gas and improves the water vapor separation effect. Meanwhile, the filter plate 29 can filter and prevent external impurities from entering the device. At the same time, the one-way valve 27 can ensure unidirectional airflow and prevent exhaust gas from leaking backward from the mixing pipe 26 when the exhaust gas supply stops.

[0052] When the exhaust gas flows through the volute 23 at high speed, it will impact the centrifugal disc 21 and the volute baffle 22, which will easily cause the centrifugal disc 21 to vibrate. When the centrifugal disc 21 vibrates, the deformation of the corrugated part 19 and the elastic sealing ring 25 will absorb the energy, thereby achieving the effect of noise reduction.

[0053] After being centrifuged and separated by water vapor in the spiral air passage 23, the exhaust gas finally gathers at the center of the centrifugal disc 21. Then, it flows upward into the silencer 31 through the connecting hose 32. After passing through the silencer 31, the exhaust gas diffuses to the lower chamber of the silencer's stabilizing exhaust hood 33. Then, through the stabilizing diffusion effect of the silencer's stabilizing exhaust hood 33, it flows into the stacked sound-absorbing layer 34. After the stacked sound-absorbing layer 34 absorbs the noise, the exhaust gas is finally discharged, thus completing the sound-absorbing and emission work of the exhaust gas.

[0054] The aforementioned one-way valve 27, silencer 31, silencer stabilizing exhaust cover 33, and stacked sound-absorbing layer 34 are mature existing technologies, and will not be described in detail here.

[0055] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0056] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0057] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A composite pipeline filter silencer, characterized in that, The composite pipeline filter silencer includes: The upper shell (10) is fixedly connected to the bottom of the upper shell (10), and a centrifugal condensation component is provided inside the lower shell (11); Partition (30), the upper shell (10) and the lower shell (11) are fixedly connected to the partition (30), the center of the partition (30) is fixedly connected to the silencer (31), and the lower shell (11) is fixedly connected to the silencer stabilizing exhaust cover (33) above the silencer (31). The silencer (31) is connected to the centrifugal condensate component. The silencer (31) and the silencer gas stabilizing exhaust hood (33) have a porous structure. A grid plate (35) is fixedly connected inside the lower housing (11) above the silencer gas stabilizing exhaust hood (33). A set of stacked sound-absorbing layers (34) is provided above the grid plate (35).

2. The composite pipeline filter silencer according to claim 1, characterized in that, A set of support rods (13) are fixedly connected to the top edge of the upper shell (10), and a rain cap (12) that covers the top of the upper shell (10) is fixedly connected to the top of the support rods (13).

3. The composite pipeline filter silencer according to claim 1, characterized in that, The centrifugal condensation component includes a water storage box (18), which is fixedly connected inside the lower housing (11). A centrifugal disc (21) is fixedly connected to the water storage box (18). Two spiral baffles (22) are provided on the upper surface of the centrifugal disc (21). A cover plate (24) is fixedly connected above the spiral baffles (22) and tightly fastened to the top of the spiral baffles (22). Two spiral air passages (23) are formed between the cover plate (24), the centrifugal disc (21), and the spiral baffles (22). An air inlet pipe (15) is provided on the outer side of the lower housing (11) at the corresponding position of the opening of each spiral air passage (23).

4. The composite pipeline filter silencer according to claim 3, characterized in that, The edge of the centrifugal disc (21) extends into the water storage box (18) without contacting the inner wall of the water storage box (18), forming a U-shaped water storage cavity (20). The space inside the lower shell (11) below the water storage box (18) and the centrifugal disc (21) is a drain cavity (17). A drain outlet pipe (16) communicating with the drain cavity (17) is fixedly provided at the bottom of the lower shell (11). The drain cavity (17) is connected to the water storage cavity (20).

5. The composite pipeline filter silencer according to claim 4, characterized in that, The upper surface of the centrifugal disc (21) is conical, and the spiral air passage (23) gradually spirals upward from the edge to the center.

6. The composite pipeline filter silencer according to any one of claims 3 or 4, characterized in that, The water storage box (18) is provided with a corrugated part (19) for connecting with the centrifugal disc (21). An elastic sealing ring (25) is fixedly connected to the edge of the cover plate (24). The outer periphery of the elastic sealing ring (25) is tightly fitted with the inner wall of the lower shell (11). The silencer (31) and the cover plate (24) are flexibly connected by a connecting hose (32).

7. The composite pipeline filter silencer according to claim 6, characterized in that, A mixing pipe (26) is fixedly connected to the cover plate (24) at the edge inlet of each spiral air passage (23). The bottom end of each mixing pipe (26) is aligned with the flow direction of the exhaust gas flow in the spiral air passage (23), and a one-way valve (27) is connected to the top end of each mixing pipe (26).

8. The composite pipeline filter silencer according to claim 7, characterized in that, The space between the partition plate (30) and the cover plate (24) inside the lower housing (11) is an air cavity (28), and a plurality of porous filter plates (29) are evenly distributed on the side wall of the lower housing (11).

9. The composite pipeline filter silencer according to claim 4, characterized in that, A transparent observation window (36) is provided on the side wall of the lower housing (11) at the position corresponding to the water storage box (18), and a water inlet pipe (37) communicating with the interior of the lower housing (11) is provided on the side wall of the lower housing (11) above the observation window (36).

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