Thermal power plant exhaust gas recovery equipment

Abstract

To provide exhaust gas recovery equipment for a thermal power plant, which allows easy and quick operation when replacing a filter plate, and eliminates the need for troublesome replacement of an old filter net or other complicated operations. [Solution] A thermal power plant flue gas recovery system includes a cylinder with a first connecting pipe fixed to one side of the cylinder, a first housing 4 fixed to one end of the first connecting pipe located on the outside of the cylinder, a fixed ring 28 fixed to the inner circumferential wall of the first housing, a waste box 27 mounted on the top of the fixed ring, and the outer circumferential wall of the waste box contacting the inner circumferential wall of the first housing. The combination of absorbent, filter plate, second connecting pipe, and first housing in the cylinder enables flue gas to be filtered multiple times, significantly improving flue gas filtration efficiency and avoiding the problem of insufficient filtration accuracy. Furthermore, the installation of a cover plate 3, waste box 27, and magnetic stripe 24 allows for quick replacement of the filter plate.

Description

[Technical Field]

[0001] The present invention relates to the technical field of thermal power plants, and more particularly to flue gas recovery equipment for thermal power plants. [Background technology]

[0002] Thermal power plants produce large amounts of exhaust gases in industrial production, which not only pollute the environment but can also pose a health threat to the community. In order to treat these exhaust gases, thermal power plants usually need to install capture facilities.

[0003] According to a search, a Chinese patent with publication number CN218306773U discloses an industrial exhaust gas recovery equipment including a filter box, in which a fixed plate and a filter bag are installed inside the filter box, the fixed plate is fixedly connected to the inner wall of the filter box, and the filter bag is installed at the bottom end of the fixed plate. However, when treating complex exhaust gases, the filter precision is easily insufficient and the filtering effect is poor, and only a single filter bag is used to filter the exhaust gas. Summary of the Invention [Means for solving the problem]

[0004] In response to the shortcomings of the prior art, the present invention provides flue gas recovery equipment for thermal power plants, which mainly uses only a single filter bag to filter flue gas. However, filtration using such a single filter bag is prone to insufficient filtration accuracy when treating complex flue gas, thereby solving the problem of relatively poor filtration effect.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A thermal power plant exhaust gas recovery facility, comprising: A first connecting pipe is fixedly connected to one side of the cylindrical body, a first housing is fixedly connected to one end of the first connecting pipe provided on the outside of the cylindrical body, a fixing ring is fixedly connected to the inner circumferential wall of the first housing, a waste box is provided on the top of the fixing ring, and the outer circumferential wall of the waste box contacts the inner circumferential wall of the first housing, a through groove is opened at the bottom of the waste box, a filter plate is provided on the inner wall of the waste box, and a lifting mechanism is provided at the top of the first housing to facilitate replacement of the filter plate, and both sides of the cylindrical body A plurality of guide bars are fixedly connected between the inner walls, two slide blocks are slidably connected between two adjacent guide bars, a second connecting pipe is rotatably connected between the two adjacent guide bars, a plurality of through holes are opened in the circumferential outer walls of the two second connecting pipes, and the plurality of through holes are all located on the upper surface of the second connecting pipe, a hose is fixedly connected to the circumferential outer walls of the two second connecting pipes, and the hose is connected to the second connecting pipe, and a pushing mechanism is provided on the bottom inner wall of the cylindrical body for moving the two second connecting pipes.

[0006] Furthermore, the lifting mechanism includes a cover plate provided on the top of the first housing, a magnetic stripe is fixedly connected to the top of the waste box, the magnetic stripe and the cover plate are adsorbed, and a position limiting mechanism for fixing the cover plate is provided on the outer circumference of the first housing.

[0007] Based on the above technical solutions, the position limiting mechanism includes a plurality of protruding blocks, all of which are uniformly fixedly connected to the circumferential outer wall of the first housing, a plurality of threaded rods slidably connected to the top of the cover plate, and the threaded rods are screwed into the protruding blocks, and one end of each of the threaded rods located on the top of the cover plate is fixedly connected to a pressing plate, and the bottoms of the pressing plates contact the top of the cover plate.

[0008] In a further aspect of the present invention, the pushing mechanism includes a bottom housing fixedly connected to the bottom inner wall of the cylindrical body, a motor fixedly connected to one side of the bottom housing, the motor's output shaft passing through the bottom housing and connected to a missing tooth gear via a key, a guide frame fixedly connected to one side of the inner wall of the cylindrical body, a fixed frame slidably connected to the circumferential outer wall of the guide frame, two second connecting pipes both rotatably connected to the fixed frame, a third rack fixedly connected to the bottom of the fixed frame, and the third rack meshes with the missing tooth gear, a tension spring fixedly connected to one side of the fixed frame, and the other end of the tension spring is fixed to the guide frame.

[0009] Furthermore, two first racks are fixedly connected to one side of the cylindrical body, and two second racks are fixedly connected to one side of the cylindrical body. One ends of the two second connecting pipes both pass through the slide block and are fixedly connected to a first gear, and the first gear can mesh with the first rack and the second rack.

[0010] Based on the above technical means, a second inlet pipe communicating with the cylinder is fixedly connected to one side of the cylinder, a spiral sheet is fixedly connected to the outer circumferential surface of the output shaft of the motor, and the outer side of the spiral sheet is in contact with the inner circumferential wall of the second inlet pipe, one end of the second inlet pipe is fixedly connected to a second housing communicating with the second inlet pipe, a first inlet pipe communicating with the second housing is fixedly connected to one side of the second housing, and the first inlet pipe is fixed to the cylinder, and a filtration mechanism for filtering the absorption liquid is provided on the inner wall of the second housing.

[0011] In a further aspect of the present invention, the filtering mechanism is a filter element, and the filter element is provided on an inner wall of the second housing.

[0012] Furthermore, an exhaust pipe is fixedly connected to the top of the cylinder and communicates with the cylinder, an air inlet pipe is fixedly connected to the outer circumferential surface of the first housing and communicates with the first housing, and flange discs are fixedly connected to one ends of both the air inlet pipe and the exhaust pipe. [Effects of the Invention]

[0013] Compared with the prior art, the present invention provides a thermal power plant flue gas recovery equipment, which has the following beneficial effects: The present invention achieves multiple filtering of exhaust gases by combining the absorbent liquid, filter plate, second connecting pipe, and first housing in the cylinder, thereby significantly improving the filtering efficiency of exhaust gases, avoiding the problem of insufficient filtering accuracy, ensuring the safety and environmental protection of exhaust gases, and at the same time improving the efficiency and effectiveness of the exhaust gas recovery equipment.

[0014] The present invention realizes quick replacement of the filter plate by installing a cover plate, a waste box, and a magnetic strip, making the operation of replacing the filter plate simple and quick, and eliminating the need for cumbersome replacement of old filter nets and other complicated operations, thereby reducing the equipment downtime and improving the filtration efficiency and equipment maintenance efficiency. In addition, the waste box can collect impurities filtered out from the filter plate, making subsequent processing more convenient.

[0015] By combining and using a missing tooth gear, a third rack, and a fixed frame, the present invention greatly increases the range of exhaust gas injection through the through-hole, thereby significantly increasing the contact area between the exhaust gas and the absorbing liquid. As the exhaust gas passes through the absorbing liquid, it can be more fully absorbed and purified, and the filtration efficiency is greatly improved.

[0016] In the present invention, by using the first gear, the first rack, and the second rack in combination, the exhaust gas injection range of the through holes is further improved, and the exhaust gas can be injected uniformly into the absorption liquid, thereby significantly improving the filtration efficiency of the absorption liquid.

[0017] 5. The present invention uses a spiral filter sheet and a filter element to filter the absorbent, effectively removing impurities and particulate matter, which not only greatly improves the utilization rate of the absorbent but also greatly saves resources. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a thermal power plant flue gas recovery system according to the present invention; [Figure 2] 1 is a cross-sectional view of a cylindrical body of a thermal power plant exhaust gas recovery system according to the present invention. [Figure 3] 1 is a partially enlarged view of the thermal power plant exhaust gas recovery equipment of the present invention. [Figure 4] 1 is a cross-sectional view of a first housing of the thermal power plant exhaust gas recovery equipment of the present invention. [Figure 5] 1 is an enlarged view of the waste box of the thermal power plant flue gas recovery equipment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, the technical aspects of the embodiments of the present invention will be clearly and completely described in connection with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present invention.

[0020] 1 to 5, a thermal power plant exhaust gas recovery facility includes a cylindrical body 1, A first connecting pipe 5 is welded to one side of the cylindrical body 1, one end of the first connecting pipe 5 located on the outside of the cylindrical body 1 is fixedly connected to a first housing 4 with bolts, an exhaust pipe 2 is fixedly connected to the top of the cylindrical body 1 and communicates with the cylindrical body 1, an air inlet pipe 30 is fixedly connected to the outer circumferential side of the first housing 4 and communicates with the first housing 4, and flange discs are fixedly connected to one end of both the air inlet pipe 30 and the exhaust pipe 2. The flange discs make it easy to connect the air inlet pipe 30, exhaust pipe 2, and external piping, greatly improving the efficiency of installation and maintenance. A fixing ring 28 is fixedly connected to the inner circumferential wall of the first housing 4, a waste box 27 is provided on the top of the fixing ring 28, and the outer circumferential wall of the waste box 27 contacts the inner circumferential wall of the first housing 4. A through groove 31 is opened at the bottom of the waste box 27, a filter plate 29 is provided on the inner wall of the waste box 27, and a lifting mechanism is provided at the top of the first housing 4 to facilitate replacement of the filter plate 29. A plurality of guide bars 15 are fixedly connected between the inner walls on both sides of the cylindrical body 1, and two adjacent guide bars 1 Two slide blocks 16 are slidably connected between the guide bars 15, and a second connecting pipe 20 is rotatably connected between two adjacent guide bars 15. A plurality of through holes 21 are formed in the circumferential outer walls of the two second connecting pipes 20, and the plurality of through holes 21 are all located on the upper surface of the second connecting pipe 20. A hose 22 is fixedly connected to the circumferential outer walls of the two second connecting pipes 20, and the hose 22 is connected to the second connecting pipe 20. A pushing mechanism for moving the two second connecting pipes 20 is provided on the bottom inner wall of the cylindrical body 1. The exhaust gas enters the first housing 4, passes from the first housing 4 through the filter plate 29 and into the first connecting pipe 5, the exhaust gas in the first connecting pipe 5 passes through two hoses 22 and enters two second connecting pipes 20 respectively, the exhaust gas in the second connecting pipes 20 passes through multiple through holes 21 and is sprayed evenly onto the absorption liquid in the cylindrical body 1, and by filtering the exhaust gas multiple times through the filter plate 29 and the absorption liquid in the cylindrical body 1, the filtering efficiency of the exhaust gas is greatly improved and the problem of insufficient filtration accuracy is avoided.

[0021] In this application, the lifting mechanism includes a cover plate 3 mounted on the top of the first housing 4, a magnetic stripe 24 fixedly connected to the top of the waste box 27, the magnetic stripe 24 and the cover plate 3 being attracted to each other, the magnetic force of the magnetic stripe 24 being greater than the gravity of the waste box 27 and the filter plate 29, and a position limiting mechanism for fixing the cover plate 3 is mounted on the outer circumferential surface of the first housing 4. The position limiting mechanism includes a plurality of protruding blocks 26, all of which are uniformly fixedly connected to the outer circumferential wall of the first housing 4 via bolts, a plurality of threaded rods 33 slidably connected to the top of the cover plate 3 and screwed into the protruding blocks 26, and one end of each of the threaded rods 33 mounted on the top of the cover plate 3 is fixedly connected to a pressing plate 25 via a bolt, the bottoms of the pressing plates 25 contacting the top of the cover plate 3. The pressure plate 25 is rotated, which rotates the threaded rod 33, threading the threaded rod 33 into the protruding block 26. The threaded rod 33 then moves the pressure plate 25 downward, bringing the pressure plate 25 into contact with the cover plate 3, achieving rapid locking of the cover plate 3. The rotation limiting mechanism releases the cover plate 3 from its locked position, and the cover plate 3 is then pulled up and detached from the first housing 4. The cover plate 3 then moves the magnetic strip 24 up, which moves the waste box 27 and filter plate 29 up, detaching the waste box 27 from the first housing 4. The filter plate 29 is then removed from the waste box 27 and a new filter plate 29 is placed into the waste box 27. The waste box 27 is then placed into the first housing 4, and the cover plate 3 is then replaced. This enables rapid replacement of the filter plate 29, significantly reducing downtime and improving filter efficiency and equipment maintenance efficiency.

[0022] In the present application, the pushing mechanism includes a bottom housing 32 fixedly connected to the bottom inner wall of the cylindrical body 1, a motor fixedly connected to one side of the bottom housing 32, the motor's output shaft passing through the bottom housing 32 and connected to the missing tooth gear 13 via a key, a guide frame 14 fixedly connected to one side inner wall of the cylindrical body 1 via a bolt, a fixed frame 18 slidably connected to the circumferential outer wall of the guide frame 14, two second connecting pipes 20 both rotatably connected to the fixed frame 18, a third rack 19 fixedly connected to the bottom of the fixed frame 18 and meshing with the missing tooth gear 13, a tension spring 17 fixedly connected to one side of the fixed frame 18, and the other end of the tension spring 17 is fixed to the guide frame 14. When the motor is started, the motor output shaft rotates the missing tooth gear 13, which drives the third rack 19 to move to the right, which drives the fixed frame 18 to move to the right, and the fixed frame 18 drives the two second connecting pipes 20 to the right. When the missing tooth gear 13 rotates to the missing tooth position, the missing tooth gear 13 and the rack cannot mesh together, and the tension force of the tension spring 17 drives the fixed frame 18 to move to the left, which then drives the two second connecting pipes 20 to move to the left. At the same time, the fixed frame 18 drives the third rack 19 to move left, resetting the third rack 19, which then moves back and forth, causing the two second connecting pipes 20 to move back and forth, thereby greatly increasing the flue gas injection range of the through hole 21. Furthermore, the contact area between the flue gas and the absorption liquid is increased, which further improves the efficiency of flue gas filtration and improves the effectiveness of the flue gas recovery equipment.

[0023] In the present application, two first racks 8 are fixedly connected to one side of the cylindrical body 1, and two second racks 9 are fixedly connected to one side of the cylindrical body 1. One ends of two second connecting pipes 20 each pass through the slide block 16 and are fixedly connected to a first gear 23, which can mesh with the first rack 8 and the second rack 9. The two second connecting pipes 20 reciprocate, which in turn reciprocate the first gear 23, which sequentially meshes with the first rack 8 and the second rack 9, causing the first gear 23 to rotate reciprocally, which in turn causes the first gear 23 to swing. This further increases the flue gas injection range of the through-hole 21, allowing the flue gas to be injected uniformly into the absorbing liquid, thereby improving the filtering efficiency of the absorbing liquid for the flue gas.

[0024] In the present application, a second inflow pipe 11 communicating with the cylindrical body 1 is fixedly connected to one side of the cylindrical body 1, a spiral sheet 10 is fixedly connected to the circumferential outside of the motor output shaft, the outside of the spiral sheet 10 is in contact with the circumferential inner wall of the second inflow pipe 11, one end of the second inflow pipe 11 is fixedly connected to a second housing 6 communicating with the second inflow pipe 11, a first inflow pipe 7 communicating with the second housing 6 is fixedly connected to one side of the second housing 6, and the first inflow pipe 7 is fixed to the cylindrical body 1, and a filtration mechanism for filtering the absorption liquid is provided on the inner wall of the second housing 6. The filtration mechanism is a filter element 12, and the filter element 12 is provided on the inner wall of the second housing 6. The diluted liquid is filtered through the filter element 12, effectively removing impurities and particulate matter, thereby increasing the utilization rate of the absorbent liquid and significantly saving resources. The motor output shaft rotates the spiral sheet 10, which pushes the absorbent liquid in the cylinder 1 through the first flow pipe 11 into the second housing 6, and the diluted liquid enters the first flow pipe 7 through the filtration mechanism. The second flow pipe 7 then returns the absorbent liquid to the cylinder 1, circulating it. The diluted liquid is then filtered through the filtration mechanism, thereby increasing the utilization rate of the absorbent liquid.

[0025] The operating principle of this embodiment is as follows: during use, exhaust gas enters the first housing 4 through the intake pipe 30, and from the first housing 4 passes through the filter plate 29 into the first connecting pipe 5. The exhaust gas in the first connecting pipe 5 enters the two second connecting pipes 20 through the two hoses 22, respectively. The exhaust gas in the second connecting pipes 20 is uniformly sprayed onto the absorption liquid in the cylindrical body 1 through the multiple through holes 21. At the same time, the motor is started, and the output shaft of the motor rotates the missing tooth gear 13. The missing tooth gear 13 moves the third rack 19 to the right, which in turn moves the fixed frame 18 to the right. The fixed frame 18 moves the two second connecting pipes 20 to the right. Due to the position of the missing tooth gear 13 rotating the missing tooth gear 19, the missing tooth gear 13 and the rack gear cannot mesh, and the tension of the tension spring 17 causes the fixed frame 18 to move to the left. The fixed frame 18 moves the two second connecting pipes 20 to the left, and at the same time, the fixed frame 18 moves the third rack 19 to the left, resetting the third rack 19 and causing it to move back and forth. The movement of the two second connecting pipes 20 greatly increases the exhaust gas injection range of the through-hole 21, and the two second connecting pipes 20 move back and forth, which in turn move the first gear 23 back and forth. The first gear 23 meshes with the first rack 8 and the second rack 9 sequentially, causing the first gear 23 to rotate back and forth, which in turn causes the second connecting pipe 20 to oscillate. At the same time, the motor output shaft rotates the spiral sheet 10, which pushes the absorbing liquid in the cylindrical body 1 through the second guide pipe 11 into the second housing 6, and the liquid to be diluted passes through the filter element 12 and enters the first guide pipe 7, and the second guide pipe 7 returns to the cylindrical body 1.

[0026] All electrical components appearing in the text are connected to an external master controller and a 220V streetcar, and the master controller can be a conventionally known device controlled by a computer or the like.

[0027] In the description of this specification, unless otherwise clearly specified or limited, the terms "connect" and "connect" should be understood in a broad sense, and may refer to, for example, a fixed connection, a mechanical connection, an electrical connection, or a direct connection. Those skilled in the art can specifically understand the specific meaning of the above terms in the present invention.

[0028] In the description herein, the terms "comprises," "comprises," or any other variation thereof, are intended to encompass a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a set of elements includes not only those elements but also other elements not expressly listed, or should be interpreted to include elements inherent in such process, method, article, or apparatus.

[0029] While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that changes, modifications, substitutions and variations can be made without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. [Explanation of symbols]

[0030] 1. Cylinder; 2. Exhaust pipe; 3. Cover plate; 4. First housing; 5. First connecting pipe; 6. Second housing; 7. First guide pipe; 8. First rack; 9. Second rack; 10. Spiral sheet; 11. Second guide pipe; 12. Filter element; 13. Missing tooth gear; 14. Guide frame; 15. Guide bar; 16. Slide block; 17. Tension spring; 18. Fixing frame; 19. Third rack; 20. Second connecting pipe; 21. Through hole; 22. Hose; 23. First gear; 24. Magnetic strip; 25. Pressing plate; 26. Protruding block; 27. Waste box; 28. Fixing ring; 29. ​​Filter plate; 30. Intake pipe; 31. Through groove; 32. Bottom housing; 33. Screw rod.

Claims

1. A thermal power plant exhaust gas recovery facility including a cylindrical body (1), A first connecting pipe (5) is fixedly connected to one side of the cylindrical body (1), a first housing (4) is fixedly connected to one end of the first connecting pipe (5) provided on the outside of the cylindrical body (1), a fixing ring (28) is fixedly connected to the circumferential inner wall of the first housing (4), a waste box (27) is provided on the top of the fixing ring (28), and the circumferential outer wall of the waste box (27) contacts the circumferential inner wall of the first housing (4), a through groove (31) is opened in the bottom of the waste box (27), a filter plate (29) is provided on the inner wall of the waste box (27), a lifting mechanism is provided on the top of the first housing (4) to facilitate replacement of the filter plate (29), and a plurality of filters are provided between the inner walls on both sides of the cylindrical body (1). a second connecting pipe (20) rotatably connected between the two adjacent guide bars (15); a plurality of through holes (21) formed in the circumferential outer walls of the two second connecting pipes (20), the plurality of through holes (21) being all located on the upper surface of the second connecting pipe (20); a hose (22) fixedly connected to the circumferential outer walls of the two second connecting pipes (20), the hose (22) communicating with the second connecting pipe (20); and a pushing mechanism for moving the two second connecting pipes (20) provided on the bottom inner wall of the cylindrical body (1).

2. The thermal power plant exhaust gas recovery equipment according to claim 1, characterized in that the lifting mechanism includes a cover plate (3) provided on the top of the first housing (4), a magnetic stripe (24) is fixedly connected to the top of the waste box (27), the magnetic stripe (24) and the cover plate (3) are attracted to each other, and a position limiting mechanism for fixing the cover plate (3) is provided on the outer circumferential side of the first housing (4).

3. 3. The thermal power plant exhaust gas recovery equipment according to claim 2, wherein the position limiting mechanism includes a plurality of protruding blocks (26), all of which are uniformly fixedly connected to the circumferential outer wall of the first housing (4), a plurality of threaded rods (33) slidably connected to the top of the cover plate (3), and the threaded rods (33) are screwed into the protruding blocks (26), and one end of each of the threaded rods (33) located on the top of the cover plate (3) is fixedly connected to a pressing plate (25), and the bottoms of the plurality of pressing plates (25) contact the top of the cover plate (3).

4. The pushing mechanism includes a bottom housing (32) fixedly connected to the bottom inner wall of the cylindrical body (1), a motor fixedly connected to one side of the bottom housing (32), the motor's output shaft passing through the bottom housing (32) and connected to a missing tooth gear (13) via a key, a guide frame (14) fixedly connected to the inner wall on one side of the cylindrical body (1), and a fixed frame (18) slidably connected to the circumferential outer wall of the guide frame (14), and 2. The thermal power plant exhaust gas recovery equipment according to claim 1, wherein each of the second connecting pipes (20) is rotatably connected to a fixed frame (18), a third rack (19) is fixedly connected to the bottom of the fixed frame (18), and the third rack (19) is engaged with the missing tooth gear (13), and a tension spring (17) is fixedly connected to one side of the fixed frame (18), and the other end of the tension spring (17) is fixed to a guide frame (14).

5. The thermal power plant exhaust gas recovery equipment according to claim 4, characterized in that two first racks (8) are fixedly connected to one side of the cylindrical body (1), two second racks (9) are fixedly connected to one side of the cylindrical body (1), one ends of the two second connecting pipes (20) each pass through a slide block (16) and are fixedly connected to a first gear (23), and the first gear (23) can mesh with the first rack (8) and the second rack (9).

6. 6. The thermal power plant exhaust gas recovery system according to claim 5, wherein a second conduit (11) communicating with the cylindrical body (1) is fixedly connected to one side of the cylindrical body (1), a spiral sheet (10) is fixedly connected to the outer circumferential surface of the output shaft of the motor, the outer side of the spiral sheet (10) is in contact with the inner circumferential wall of the second conduit (11), one end of the second conduit (11) is fixedly connected to a second housing (6) communicating with the second conduit (11), one side of the second housing (6) is fixedly connected to a first conduit (7) communicating with the second housing (6), the first conduit (7) is fixed to the cylindrical body (1), and a filtration mechanism for filtering the absorption liquid is provided on the inner wall of the second housing (6).

7. 7. The thermal power plant exhaust gas recovery system according to claim 6, wherein the filtering mechanism is a filter element (12), and the filter element (12) is provided on an inner wall of the second housing (6).

8. 7. The thermal power plant exhaust gas recovery system according to claim 6, wherein an exhaust pipe (2) is fixedly connected to the top of the cylindrical body (1), the exhaust pipe (2) is in communication with the cylindrical body (1), an inlet air pipe (30) is fixedly connected to the outer circumferential surface of the first housing (4) and the inlet air pipe (30) is in communication with the first housing (4), and flange discs are fixedly connected to one ends of both the inlet air pipe (30) and the exhaust pipe (2).

Images