Tail gas treatment structure of mobile diesel generating set

Abstract

The invention relates to the technical field of tail gas treatment, in particular to a tail gas treatment structure of a movable diesel generating set. Comprising a supporting seat and further comprises a cyclone separator, a first barrel, a flow guide part, a second barrel, a third barrel, a vibration part, a driving part and the like. Through cooperative cooperation of the cyclone separator, the impingement plate, the flow guide part, the vibration part and the driving part, in the tail gas treatment process, the cyclone separator separates and collects large particles, the impingement plate enables airflow to uniformly enter DOC for oxidation, the flow guide part sweeps high-temperature gas to the end face of the DPF to form uniform heating, and the tail gas treatment effect is improved. The vibration part transmits vibration to the DPF through the vibration transmission rod so that a soot layer can be loosened, and the driving part drives the flow guide part to rotate and the vibration part to work at the same time. Therefore, the problems that in the prior art, an ash-carbon composite layer formed by ash accumulation hinders regeneration heat transfer, and a soot layer is compacted compactly under the low-load working condition, so that regeneration starting is difficult, and heat spreading is slow are systematically solved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment technology, and in particular to an exhaust gas treatment structure for a mobile diesel generator set. Background Technology

[0002] With the continuous upgrading of emission standards for non-road mobile machinery, diesel generator sets generally adopt a combined aftertreatment system of DOC (diesel oxidation catalyst) + DPF (diesel particulate filter) + SCR (selective catalytic reduction) to meet the emission limits for particulate matter and nitrogen oxides. In existing technologies, the DPF captures soot through wall-flow filtration and restores its filtration capacity by oxidizing the soot into carbon dioxide through periodic regeneration. Passive regeneration relies on DOC to oxidize NO into NO2, thereby oxidizing soot. Active regeneration uses fuel injection after the engine or fuel injectors installed in the exhaust pipe to increase the DPF inlet temperature to 550℃-650℃ by using the heat released from DOC oxidation, thus burning the soot. For the problem of ash accumulation, existing technologies mainly rely on the periodic offline disassembly and cleaning of the DPF.

[0003] However, the current exhaust gas treatment structure has the following problems in use: 1. Lack of source pretreatment of large particulate ash, which leads to the formation of a dense ash-carbon composite layer in the DPF: Ash is non-combustible and has low thermal conductivity. During regeneration, it acts as a heat insulation layer, preventing heat from penetrating and oxygen from entering. Even if the regeneration temperature meets the standard, it can only burn off the surface carbon soot. The internal carbon soot is wrapped by ash and accumulates over a long period of time, eventually causing the regeneration to completely fail. Existing technology relies on periodic offline disassembly and cleaning, and cannot actively intervene during operation, which poses a risk of sudden failure for mobile generator sets.

[0004] 2. The lack of effective means to improve the physical state of the soot layer leads to the compaction of soot into a dense layer under low load conditions, making regeneration difficult to start and slow heat spread: The dense soot layer prevents NO2 from penetrating during passive regeneration and slows heat conduction during active regeneration. Even if local ignition is successful, the heat of combustion is difficult to spread quickly to the entire cross section, resulting in a local regeneration phenomenon where the center is burned out but the edges are still blocked. Existing technologies rely on increasing the regeneration temperature and extending the regeneration time to compensate, but this does not improve the loose state of the soot layer from a physical perspective. Instead, it increases fuel consumption and the risk of thermal stress damage.

[0005] Therefore, the lack of ash source pretreatment and carbon soot physical state improvement methods in the existing technology leads to problems such as the ash-carbon composite layer hindering the heat transfer of regeneration, the carbon soot compaction causing difficulty in regeneration start-up and slow heat spread, and ultimately poor regeneration effect. These are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above problems, the present invention provides an exhaust gas treatment structure for a mobile diesel generator set to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a tail gas treatment structure for a mobile diesel generator set, including a support base and a cyclone separator, wherein a dirt collection section is provided at the lower port of the cyclone separator, a connecting pipe is connected to the cyclone separator, and an anti-impact plate is provided inside the connecting pipe.

[0008] The first cylinder is connected to the connecting pipe at its left end, and a DOC is installed inside the first cylinder.

[0009] The flow guide is located at the right end of the cylinder body. The flow guide includes a cylinder installed at the right end of the cylinder body. A flow guide tube is rotatably installed inside the cylinder. Multiple tapered tubes are evenly connected to the right end of the flow guide tube.

[0010] The second cylinder is located at the right end of the cylinder, and a DPF is installed inside the second cylinder.

[0011] The third cylinder is located at the right end of the second cylinder. An SCR is installed inside the third cylinder, and an air outlet pipe and interface are connected to the third cylinder.

[0012] The vibration unit is installed on the second cylinder. The vibration unit includes a vibration transmission assembly. Multiple sets of vibration transmission assemblies are uniformly fixed on the outer circumference of the DPF. Each set of vibration transmission assemblies consists of two vibration transmission rods. The vibration transmission rods movably pass through the second cylinder. A corrugated pipe is provided between the vibration transmission rods and the second cylinder.

[0013] The drive unit is located between the flow guide unit and the vibration unit.

[0014] After the exhaust gas passes through the cyclone separator to separate large particles, it enters the DOC oxidation. The guide tube sweeps the high-temperature gas to the end face of the DPF through the conical tube. At the same time, the vibrating part generates high-frequency vibration, which is transmitted to the DPF through the vibration rod, making the carbon soot layer loose and regenerating it at high temperature.

[0015] As a preferred embodiment, the drive unit includes a rotating shaft rotatably mounted on a support base, a drive gear fixedly mounted on the rotating shaft, a driven gear meshing with the drive gear coaxially fixedly mounted on the guide tube, and a stepper motor whose output shaft is fixedly connected to the rotating shaft fixedly mounted on the support base.

[0016] As a preferred embodiment, the two vibration transmission rods in the same group are fixedly mounted with a connecting plate at the ends away from the DPF. The end of the connecting plate away from the vibration transmission rod is provided with a corrugated boss. Multiple guide rods are fixedly mounted on the cylinder body three. A sliding sleeve coaxial with the cylinder body three is slidably mounted on the guide rods. Rectangular holes are opened on the sliding sleeve at positions corresponding to the corrugated bosses.

[0017] As a preferred embodiment, the sliding sleeve is provided with an actuator for actuating the wave boss to generate vibration. The actuator includes a fixed plate fixedly installed in a rectangular hole. A compression spring is fixedly installed on the side of the fixed plate near the axis of the sliding sleeve. A shaft seat is fixedly installed on the end of the compression spring away from the fixed plate. A roller is rotatably installed on the shaft seat. The roller abuts against the corresponding wave boss.

[0018] As a preferred embodiment, the support base is provided with a push-pull part for driving the sliding sleeve to reciprocate. The push-pull part includes a drive shaft fixedly installed at the right end of the rotating shaft. The outer wall of the drive shaft is inclined with an annular groove along its circumference. A guide post that slides with the annular groove is fixedly installed on the sliding sleeve.

[0019] As a preferred embodiment, the sludge collection section includes a guide box fixedly installed at the lower end of the cyclone separator and communicating with it, a sealing block being movably installed inside the guide box, and a collection bottle being threadedly connected to the lower end of the guide box.

[0020] As a preferred embodiment, an electric telescopic rod is fixedly installed at the upper end of the guide box. After the telescopic section of the electric telescopic rod slides through the upper end of the guide box, a push-pull rod is fixedly installed thereon. The push-pull rod is fixedly connected to the lower end of the sealing block.

[0021] As a preferred embodiment, the tapered tubes are uniformly distributed in a vortex pattern.

[0022] As a preferred embodiment, the sealing block has a conical structure.

[0023] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, the present invention, through the coordinated cooperation of a cyclone separator, a baffle plate, a guide section, a vibration section, and a drive section, achieves the following in the exhaust gas treatment process: the cyclone separator separates and collects large particles, the baffle plate ensures that the airflow enters the DOC for oxidation evenly, the guide section sweeps high-temperature gas to the DPF end face to form uniform heating, the vibration section transmits vibration to the DPF through a vibration rod to loosen the soot layer, and the drive section simultaneously drives the guide section to rotate and the vibration section to work. This systematically solves the problems in the prior art where ash accumulation forms an ash-carbon composite layer that hinders the transfer of regeneration heat, and the problem of compacted and dense soot layer under low load conditions leading to difficulty in regeneration startup and slow heat spread.

[0024] Second, by setting a dirt-collecting section at the lower end of the cyclone separator, the large particles separated are collected in a concentrated manner, which avoids the ash from entering the downstream DPF and mixing with soot to form an ash-carbon composite layer. This eliminates the technical defects caused by the non-combustible nature and low thermal conductivity of ash, which prevent heat from penetrating and oxygen from entering during regeneration.

[0025] Third, the present invention simultaneously drives the guide tube to rotate, thereby driving the conical tube to sweep high-temperature gas to the DPF end face, and drives the vibration unit to generate high-frequency vibration, which is transmitted to the DPF carrier through the vibration rod. This allows the DPF to obtain uniform heating, while the carbon soot layer in the carrier becomes loose and porous due to the vibration. This effectively solves the technical problem of slow heat spread and incomplete local regeneration after the carbon soot is repeatedly impacted and compacted by the exhaust pressure under low load conditions.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 2 for Figure 1 A sectional view.

[0030] Figure 3 for Figure 2 Enlarged view of the structure at point A in the image.

[0031] Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle.

[0032] Figure 5 This is a schematic diagram of the anti-impact plate of the present invention.

[0033] Figure 6 This is a schematic diagram of the structure between the guide tube and the tapered tube of the present invention.

[0034] Figure 7 This is a schematic diagram of the drive unit of the present invention.

[0035] Figure 8 for Figure 7 Enlarged view of the structure at point C.

[0036] Reference numerals: 10, Support base; 2, Cyclone separator; 20, Connecting pipe; 21, Anti-impact plate; 11, Cylinder body one; 110, DOC; 3, Flow guide; 30, Cylinder; 31, Flow guide tube; 32, Rotary sealing ring; 33, Conical tube; 12, Cylinder body two; 120, DPF; 13, Cylinder body three; 130, SCR; 131, Air outlet pipe; 132, Interface; 4, Vibration unit; 40, Vibration transmission rod; 41, Bellows; 42. 43. Connecting plate; 44. Wave-shaped boss; 5. Sliding sleeve; 6. Actuating part; 50. Fixing plate; 51. Compression spring; 52. Shaft seat; 53. Roller shaft; 6. Push-pull part; 60. Drive shaft; 61. Ring groove; 62. Guide post; 7. Drive part; 70. Rotating shaft; 71. Driving gear; 72. Driven gear; 73. Stepper motor; 8. Sludge collection part; 80. Guide box; 81. Sealing block; 82. Collection bottle; 83. Electric telescopic rod; 84. Push-pull rod. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] like Figure 1 , Figure 2 and Figure 5 As shown, a mobile diesel generator set exhaust gas treatment structure includes a support base 10, and further includes: a cyclone separator 2, with a dirt-collecting part 8 provided at its lower port, a connecting pipe 20 installed at the air outlet of the cyclone separator 2, and an anti-impact plate 21 provided at the other end of the connecting pipe 20; a cylinder 11, the left end of which is connected to the connecting pipe 20, and a DOC110 installed inside the cylinder 11.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the flow guide 3 is located at the right end of the cylinder 11. The flow guide 3 includes a cylinder 30 fixedly installed at the right end of the cylinder 11. A flow guide 31 is provided inside the cylinder 30. The flow guide 31 and the cylinder 30 are connected by a rotating sealing ring 32. Multiple tapered tubes 33 are evenly connected to the right end of the flow guide 31.

[0040] like Figure 2 and Figure 5As shown, cylinder 12 is located at the right end of cylinder 30, and DPF120 is installed inside cylinder 12; cylinder 3 is located at the right end of cylinder 12, and SCR130 is installed inside cylinder 3. The right end and the outer circumference of cylinder 3 are respectively connected to air outlet pipe 131 and interface 132. Cylinder 11, cylinder 30, cylinder 2 12 and cylinder 3 13 are assembled and fixedly installed on support base 10.

[0041] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the vibration unit 4 is disposed on the second cylinder 12. The vibration unit 4 includes a vibration transmission assembly. Multiple sets of vibration transmission assemblies are uniformly fixedly installed on the outer circumference of the DPF120. Each set of vibration transmission assemblies consists of two vibration transmission rods 40. The vibration transmission rods 40 movably pass through the second cylinder 12. A bellows 41 is provided between the vibration transmission rods 40 and the second cylinder 12. The drive unit 7 is disposed between the flow guide unit 3 and the vibration unit 4.

[0042] like Figure 6 As shown, the tapered tubes 33 are uniformly distributed in a vortex pattern.

[0043] like Figures 1 to 7 As shown, during actual operation, after the diesel generator set starts, the high-temperature exhaust gas first enters the cyclone separator 2. The cyclone separator 2 is an existing technology structure, so it will not be described in detail. The cyclone separator 2 works on the principle of centrifugal sedimentation. After the exhaust gas enters tangentially, it forms a high-speed rotating airflow inside. The larger ash particles in the exhaust gas are thrown towards the cylinder wall under the action of centrifugal force and slide down the wall to the lower dirt collection section 8. The dirt collection section 8 collects and stores the ash, realizing the removal of large ash particles at the source. The purified gas in the central area is discharged from the air outlet of the cyclone separator 2 through the connecting pipe 20. The anti-impact plate 21 in the port of the connecting pipe 20 plays a role in buffering and uniformly distributing the airflow, preventing the high-speed airflow from directly impacting the subsequent components.

[0044] The airflow enters the cylinder 11 through the connecting pipe 20. Inside the cylinder 11 is installed DOC110 (diesel oxidation catalyst). The anti-impact plate 21 ensures that the airflow enters the DOC110 evenly. The precious metal catalyst on the surface of the DOC110 oxidizes carbon monoxide and hydrocarbons in the exhaust gas into carbon dioxide and water, and at the same time oxidizes some nitrogen monoxide into nitrogen dioxide, providing oxidant for downstream passive regeneration.

[0045] After the airflow flows out of the cylinder 11, it enters the guide section 3. When regeneration is required, the drive section 7 drives the rotating shaft 70 to rotate through the stepper motor 73. The drive gear 71 on the rotating shaft 70 drives the driven gear 72 on the guide cylinder 31 to rotate, thereby causing the guide cylinder 31 and the conical tube 33 to rotate slowly. The high-temperature gas drawn from the downstream of the DOC110 outlet is ejected from the conical tube 33 through the guide cylinder 31. Since the conical tube 33 is vortex-shaped and the guide cylinder 31 continues to rotate, the ejected high-temperature gas sweeps to the entire inlet end face of the DPF120 (diesel particulate filter) in the downstream cylinder 12, forming local high-temperature hot spots on the end face.

[0046] While the guide tube 31 rotates, the drive unit 7 drives the vibration transmission rod 40 to vibrate. The end of the vibration transmission rod 40 abuts against the DPF120 carrier, thereby transmitting the vibration to the DPF120, causing the carbon soot layer inside the DPF120 to vibrate and become loose and porous.

[0047] At this time, the guide tube 31 drives the conical tube 33 to rotate and spray high-temperature gas to continuously heat the inlet end face of the DPF120 inside the cylinder 12. The vibration makes the carbon soot layer inside the DPF120 loose and porous. The carbon soot in the central area of ​​the inlet end face is ignited first. The heat released by the combustion spreads rapidly to the surroundings in the loose carbon soot layer. The vibration further promotes the penetration of heat and oxygen, so that the entire DPF120 cross section is regenerated in a short time and the carbon soot is oxidized into carbon dioxide and discharged.

[0048] After the airflow exits from cylinder 2 12, it enters cylinder 3 13. SCR130 (Selective Catalytic Reduction) is installed inside cylinder 3 13. An interface 132 is connected to the outer circumference of cylinder 3 13 for spraying urea aqueous solution into cylinder 3 13. After the urea mixes with the exhaust gas, a reduction reaction occurs on the surface of the SCR130 carrier, converting nitrogen oxides into harmless nitrogen and water. Finally, the purified exhaust gas is discharged from the exhaust pipe 131 at the right end of cylinder 3 13.

[0049] Throughout the entire process, the components work together: the cyclone separator 2 removes large ash particles from the source, the anti-impact plate 21 protects the DOC110 and ensures uniform airflow, the guide tube 31 rotates and drives the conical tube 33 to sweep high-temperature gas to achieve uniform heating, the vibration unit 4 loosens the carbon soot layer through the vibration transmission rod 40, and the drive unit 7 simultaneously drives the rotation of the guide tube 31 and the operation of the vibration unit 4. Without relying on a complex electronic control system, the technical problems of diesel particulate filter regeneration failure and incomplete regeneration are systematically solved.

[0050] like Figure 1 , Figure 2 and Figure 8As shown, the drive unit 7 includes a rotating shaft 70 rotatably mounted on the support base 10, a drive gear 71 fixedly mounted on the rotating shaft 70, a driven gear 72 coaxially fixedly mounted on the guide tube 31 and meshing with the drive gear 71, and a stepper motor 73 whose output shaft is fixedly connected to the rotating shaft 70 fixedly mounted on the support base 10.

[0051] like Figure 2 , Figure 4 and Figure 7 As shown, the two vibration transmission rods 40 in the same group are fixedly mounted with a connecting plate 42 at the ends away from the DPF120. The connecting plate 42 is provided with a wave boss 43 at the end away from the vibration transmission rod 40. Multiple guide rods are fixedly mounted on the cylinder body 13. A sliding sleeve 44 coaxial with the cylinder body 13 is slidably mounted on the guide rods. Rectangular holes are opened on the sliding sleeve 44 at positions corresponding to the wave boss 43.

[0052] like Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the sliding sleeve 44 is provided with an actuator 5 for actuating the wave boss 43 to generate vibration. The actuator 5 includes a fixed plate 50 fixedly installed in a rectangular hole. A compression spring 51 is fixedly installed on the side of the fixed plate 50 near the axis of the sliding sleeve 44. A bearing seat 52 is fixedly installed on the end of the compression spring 51 away from the fixed plate 50. A roller 53 is rotatably installed on the bearing seat 52. The roller 53 abuts against the corresponding wave boss 43.

[0053] like Figure 1 , Figure 2 and Figure 7 As shown, the support base 10 is provided with a push-pull part 6 for driving the sliding sleeve 44 to reciprocate. The push-pull part 6 includes a drive shaft 60 fixedly installed at the right end of the rotating shaft 70. The outer wall of the drive shaft 60 is inclined with an annular groove 61 along its circumference. The sliding sleeve 44 is fixedly installed with a guide post 62 that slides in cooperation with the annular groove 61.

[0054] like Figures 1 to 7 As shown, during actual operation, after the stepper motor 73 starts, its output shaft drives the rotating shaft 70 to rotate. The driving gear 71 on the rotating shaft 70 meshes with the driven gear 72 on the guide tube 31, so that the guide tube 31 rotates stably inside the cylinder 30 through the rotating sealing ring 32.

[0055] Multiple tapered tubes 33 at the right end of the guide tube 31 rotate together with the guide tube 31, and spray the high-temperature gas flowing out of DOC110 evenly onto the end face of DPF120 installed inside the cylinder 12 in a rotating sweeping manner, so that the high-temperature gas forms a dynamic and uniform thermal field distribution on the end face of DPF120, avoiding local overheating and providing uniform preheating conditions for regeneration.

[0056] As the rotating shaft 70 rotates, the drive shaft 60 at the right end of the rotating shaft 70 rotates synchronously. The annular groove 61, which is inclined along the circumference of the outer wall of the drive shaft 60, slides and engages with the guide post 62 on the sliding sleeve 44. When the drive shaft 60 rotates, the annular groove 61 pushes the sliding sleeve 44 to move axially back and forth along the guide rod through the guide post 62, while the compression spring 51 always elastically presses the roller shaft 53 against the wave boss 43 of the connecting plate 42.

[0057] When the sliding sleeve 44 reciprocates, the roller 53 rolls on the undulating surface of the corrugated boss 43. The continuous high and low peaks and troughs on the surface of the corrugated boss 43 cause the roller 53 to generate high-frequency up and down vibrations that are consistent with the undulation period of the corrugated boss 43 during the rolling process. This vibration is directly transmitted to the vibration transmission rod 40, which is fixedly connected to the connecting plate 42, through the bearing seat 52 and the connecting plate 42. The vibration transmission rod 40 transmits the vibration generated by the roller 53 to the DPF120 carrier, so that the DPF120 generates continuous and stable micro-amplitude vibrations.

[0058] It is important to note that the vibration amplitude is small, primarily affecting the interface between soot particles rather than the carrier skeleton itself. Therefore, it will not damage the overall structure of the DPF120 or affect its designed service life. Under vibration, the carrier only experiences minute displacement within its elastic deformation range. The soot layer becomes loose and porous due to the vibration, providing excellent heat and oxygen permeation channels for subsequent regeneration.

[0059] Through the above transmission process, the stepper motor 73 simultaneously drives the guide tube 31 to rotate to achieve high-temperature gas sweeping heating. The rotational motion is converted into high-frequency reciprocating vibration of the vibration rod 40 through the mechanical transmission of the drive shaft 60, the sliding sleeve 44, the wave boss 43 and the roller shaft 53. This allows the diesel particulate filter to obtain uniform heating, while the carbon soot layer in the carrier becomes loose and porous under the action of vibration. This enables rapid heat spread and full oxidation of carbon soot during regeneration, effectively solving the problems of difficult regeneration start-up and incomplete regeneration.

[0060] like Figure 1 and Figure 2 As shown, the dirt collection section 8 includes a guide box 80 fixedly installed at the lower end of the cyclone separator 2 and connected to it. A sealing block 81 is movably installed inside the guide box 80, and a collection bottle 82 is threadedly connected to the lower end of the guide box 80.

[0061] like Figure 1 and Figure 2 As shown, an electric telescopic rod 83 is fixedly installed on the upper end of the guide box 80. The telescopic section of the electric telescopic rod 83 slides through the upper end of the guide box 80 and is then fixedly installed with a push-pull rod 84. The push-pull rod 84 is fixedly connected to the lower end of the sealing block 81.

[0062] like Figure 2 As shown, the sealing block 81 has a conical structure.

[0063] like Figure 1 and Figure 2 As shown, during operation, after the collection bottle 82 is installed at the lower end of the guide box 80 via a threaded connection, the electric telescopic rod 83 is activated. Its telescopic section drives the push-pull rod 84 to move downwards. The push-pull rod 84 pushes the sealing block 81 downwards simultaneously, causing the sealing block 81 to leave the upper port of the guide box 80. The channel between the guide box 80 and the cyclone separator 2 opens, and the ash falls into the collection bottle 82 through the guide box 80. The conical structure of the sealing block 81 allows the ash to slide down along the conical surface upon contact, preventing accumulation on the surface of the sealing block 81.

[0064] When the collection bottle 82 needs to be cleaned, the electric telescopic rod 83 drives the push-pull rod 84 to move upward, raising the sealing block 81 to a position that is tightly fitted with the upper port of the guide box 80. The sealing block 81 and the port seal the passage between the guide box 80 and the cyclone separator 2. At this time, the cyclone separator 2 can still continue to work, and the ash temporarily accumulates in the lower port of the cyclone separator 2.

[0065] Then, the collection bottle 82 is unscrewed from the lower end of the guide box 80, the ash is poured out, and then it is tightened and installed again. Subsequently, the electric telescopic rod 83 pushes the sealing block 81 down again to open the channel. The ash temporarily stored in the cyclone separator 2 and the ash separated later fall into the collection bottle 82 together for continued collection.

[0066] Throughout the cleaning process, the sealing block 81 sealed the upper port of the guide box 80 before disassembly, and the exhaust gas treatment process of the cyclone separator 2 was not interrupted.

[0067] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0068] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" 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.

[0070] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A tail gas treatment structure for a mobile diesel generator set, comprising a support base, characterized in that, Also includes: A cyclone separator with a dirt collection section at its lower port and a connecting pipe connected to the top of the cyclone separator, with an anti-impact plate installed inside the connecting pipe; The first cylinder has its left end connected to the connecting pipe, and a DOC is installed inside the first cylinder. The flow guide is located at the right end of the cylinder body. The flow guide includes a cylinder installed at the right end of the cylinder body. A flow guide tube is rotatably installed inside the cylinder. Multiple tapered tubes are evenly connected to the right end of the flow guide tube. The second cylinder is located at the right end of the cylinder, and a DPF is installed inside the second cylinder. The third cylinder is located at the right end of the second cylinder. An SCR is installed inside the third cylinder, and an air outlet pipe and interface are connected to the third cylinder. The vibration unit is set on the second cylinder. The vibration unit includes a vibration transmission assembly. Multiple sets of vibration transmission assemblies are uniformly fixedly installed on the outer circumference of the DPF. Each set of vibration transmission assemblies consists of two vibration transmission rods. The vibration transmission rods movably pass through the second cylinder. A bellows is provided between the vibration transmission rods and the second cylinder. A drive unit is disposed between the flow guide unit and the vibration unit; After the exhaust gas passes through the cyclone separator to separate large particles, it enters the DOC oxidation. The guide tube sweeps the high-temperature gas to the end face of the DPF through the conical tube. At the same time, the vibrating part generates high-frequency vibration, which is transmitted to the DPF through the vibration rod, making the carbon soot layer loose and regenerating it at high temperature.

2. The exhaust gas treatment structure for a mobile diesel generator set according to claim 1, characterized in that: The drive unit includes a rotating shaft rotatably mounted on a support base, a drive gear fixedly mounted on the rotating shaft, a driven gear coaxially fixedly mounted on the guide tube and meshing with the drive gear, and a stepper motor with an output shaft fixedly connected to the rotating shaft fixedly mounted on the support base.

3. The exhaust gas treatment structure for a mobile diesel generator set according to claim 1, characterized in that: Two vibration transmission rods in the same group are fixedly mounted with a connecting plate at the ends away from the DPF. The end of the connecting plate away from the vibration transmission rod is provided with a corrugated boss. Multiple guide rods are fixedly mounted on the cylinder body three. A sliding sleeve coaxial with the cylinder body three is slidably mounted on the guide rods. Rectangular holes are opened on the sliding sleeve at positions corresponding to the corrugated bosses.

4. The exhaust gas treatment structure for a mobile diesel generator set according to claim 3, characterized in that: The sliding sleeve is provided with an actuator for actuating the wave boss to generate vibration. The actuator includes a fixed plate fixedly installed in a rectangular hole. A compression spring is fixedly installed on the side of the fixed plate near the axis of the sliding sleeve. A shaft seat is fixedly installed on the end of the compression spring away from the fixed plate. A roller is rotatably installed on the shaft seat. The roller abuts against the corresponding wave boss.

5. The exhaust gas treatment structure for a mobile diesel generator set according to claim 3, characterized in that: The support base is provided with a push-pull part for driving the sliding sleeve to reciprocate. The push-pull part includes a drive shaft fixedly installed at the right end of the rotating shaft. The outer wall of the drive shaft is inclined with an annular groove along its circumference. A guide post that slides with the annular groove is fixedly installed on the sliding sleeve.

6. The exhaust gas treatment structure for a mobile diesel generator set according to claim 1, characterized in that: The sludge collection section includes a guide box that is fixedly installed at the lower end of the cyclone separator and communicates with it. A sealing block is movably installed inside the guide box, and a collection bottle is threadedly connected to the lower end of the guide box.

7. The exhaust gas treatment structure for a mobile diesel generator set according to claim 6, characterized in that: An electric telescopic rod is fixedly installed at the upper end of the guide box. After the telescopic section of the electric telescopic rod slides through the upper end of the guide box, a push-pull rod is fixedly installed thereon. The push-pull rod is fixedly connected to the lower end of the sealing block.

8. The exhaust gas treatment structure for a mobile diesel generator set according to claim 1, characterized in that: The tapered tubes are evenly distributed in a vortex pattern.

9. The exhaust gas treatment structure for a mobile diesel generator set according to claim 6, characterized in that: The sealing block has a conical structure.

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