Wet-type hush pipe and diesel generator exhaust system

Abstract

The utility model relates to the technical field of diesel generator equipment, in particular to a wet-type hush pipe and a diesel generator exhaust system.The wet-type hush pipe comprises a muffling cylinder, a muffling net and an air inlet pipe, after smoke of a diesel generator enters a muffling chamber, part of sound energy rubs in muffling holes and is converted into heat energy to be dissipated, and the heat energy is dissipated. And a good noise reduction effect is achieved. A water inlet pipe is arranged on the side wall of the silencing barrel, a liquid medium can be injected into the silencing chamber through the water inlet pipe, when smoke passes through the silencing chamber, part of harmful gas can be dissolved in the liquid medium or directly chemically reacts with the liquid medium, and therefore emission of the harmful gas is reduced, and through the design of the mechanism, noise is reduced, and meanwhile the noise reduction effect is achieved. Part of harmful gas can be absorbed, meanwhile, the temperature of the silencing barrel can be reduced, the service life is prolonged, and the maintenance or replacement cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel generator equipment, in particular to a wet silencer pipe and a diesel generator exhaust system. Background Art

[0002] As a safe and reliable backup power source and emergency equipment, diesel generators are widely used in industrial, commercial and residential fields. In many places where power supply from the power grid cannot be guaranteed, diesel generators are also used as the main energy supply equipment for a long time. Diesel generators usually generate noise when working. If necessary noise reduction measures are not taken, the working noise of diesel generators will not only cause serious damage to the surrounding environment, but also shorten the service life of diesel generators. In order to protect and improve environmental quality and increase the service life of diesel engines, noise must be controlled. Diesel generator noise mainly includes three categories: combustion noise, mechanical vibration noise and gas flow noise. Among them, combustion noise and mechanical vibration noise can be reduced by shock-absorbing structures, while gas flow noise is usually reduced by setting a muffler at the exhaust. The noise reduction effect of the existing diesel generator muffler is poor and cannot meet the use of some environments with strict noise requirements.

[0003] In addition, the combustion mode of diesel generators is mainly diffusion combustion, and a large amount of smoke will be generated during operation. The high temperature of the smoke will cause the muffler to overheat and reduce the service life of the muffler. In addition, the main components of the smoke include carbon oxides, nitrogen oxides and particulate matter PM, which will pollute the environment when directly discharged into the air. In the existing technology, direct discharge or centralized treatment of the smoke is usually adopted. The former is more damaging to the environment, and the latter is more expensive, which cannot meet both economic and environmental requirements. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, in the first aspect, the utility model proposes a wet silencer pipe, which has a good noise reduction effect, can absorb some harmful gases in the smoke of diesel generators, and can also reduce the temperature of the silencer pipe, thereby increasing the service life of the silencer pipe.

[0005] In a second aspect, the utility model provides a diesel generator exhaust system, which uses the wet silencer pipe of the first aspect, so as to facilitate installation or modification of an existing diesel generator.

[0006] A wet silencer pipe and a diesel generator exhaust system according to an embodiment of the utility model include:

[0007] A silencer, wherein the silencer is provided with a silencer chamber, an air inlet is provided at the upper end of the silencer, a smoke exhaust pipe is provided at the lower end of the silencer, and a water inlet pipe is provided on the side wall of the silencer;

[0008] A silencer net, the silencer net is arranged in the silencer chamber, the outer peripheral wall of the silencer net abuts against the inner peripheral wall of the silencer tube; the silencer net is provided with a plurality of silencer holes;

[0009] An air intake pipe is arranged on the air intake port, and a lower end of the air intake pipe passes through the air intake port and extends into the muffler chamber.

[0010] According to some embodiments of the present invention, the axis of the water inlet pipe is tangent to the inner circumferential wall of the silencer; the projections of the axis of the water inlet pipe and the axis of the silencer on the vertical plane have an angle α, wherein 30°≤α≤60°.

[0011] According to some embodiments of the utility model, a spiral guide groove is provided on the inner circumferential wall of the silencer, and the spiral guide groove and the water inlet pipe have a smooth transition.

[0012] According to some embodiments of the present invention, the muffler hole is a circular hole or a regular polygonal hole.

[0013] According to some embodiments of the present utility model, the silencing net is made of composite ceramics.

[0014] According to some embodiments of the present invention, the extension length of the air intake pipe is L1, and the height of the silencer is L2, wherein L1=k*L2, K is the length coefficient, 0.2≤K≤0.8.

[0015] A diesel generator exhaust system according to an embodiment of the second aspect of the utility model comprises the wet silencer pipe described in the first aspect.

[0016] According to some embodiments of the utility model, the diesel generator exhaust system further includes a gas-liquid separation mechanism and a water circulation mechanism;

[0017] The gas-liquid separation mechanism comprises a gas-liquid separator, a drain pipe and a filter screen, the gas-liquid separator is provided with an input port, an output port and a drain port, the input port is connected with the smoke exhaust pipe, the drain port is connected with the drain pipe, and the filter screen is provided on the drain port;

[0018] The water circulation mechanism includes a water pump, a cooling pipe, a return pipe, a three-way joint, a water supply pipe, a first ball valve and a second ball valve. One end of the cooling pipe is connected to the drain pipe, and the other end of the cooling pipe is connected to the input end of the water pump; the output end of the water pump is connected to the return pipe; the return pipe is connected to the first joint of the three-way joint, the second joint of the three-way joint is connected to the water supply pipe, and the third joint of the three-way joint is connected to the water inlet pipe; the first ball valve is arranged on the return pipe, and the second ball valve is arranged on the water supply pipe.

[0019] According to some embodiments of the utility model, the gas-liquid separator is provided with a water baffle between the input port and the output port, and the axis of the drain port is inclined and faces the input port; the water baffle is inclined, and the inclination direction of the water baffle is the same as the axis of the drain port.

[0020] According to some embodiments of the present invention, the cooling pipe is provided with a plurality of S-shaped pipe sections.

[0021] A wet silencer pipe and a diesel generator exhaust system according to an embodiment of the utility model have at least the following beneficial effects:

[0022] According to the scheme of the utility model, the wet silencer pipe includes a silencer, a silencer net and an air inlet pipe, wherein the silencer is provided with a silencer chamber, an air inlet is provided at the upper end of the silencer, the lower end of the air inlet pipe extends into the silencer chamber through the air inlet, and the silencer net is provided in the silencer chamber, the outer peripheral wall of the silencer net abuts the inner peripheral wall of the silencer; a plurality of silencer holes are provided on the silencer net, and through the design of this structure, after the flue gas of the diesel generator enters the silencer chamber, part of the sound energy is converted into heat energy and dissipated by friction in the silencer holes, which has a good noise reduction effect. A water inlet pipe is provided on the side wall of the silencer, and a liquid medium can be injected into the silencer chamber through the water inlet pipe. When the flue gas passes through the silencer chamber, part of the harmful gas can be dissolved in the liquid medium, or directly react chemically with the liquid medium, thereby reducing the emission of harmful gases. Through the design of this mechanism, while reducing noise, part of the harmful gas can be absorbed, and at the same time, the temperature of the silencer can be reduced, thereby increasing the service life and reducing the maintenance or replacement cost.

[0023] According to the scheme of the utility model, the wet silencer pipe in this embodiment can be directly connected to the exhaust pipe and cooling pipe of the generator for use. Specifically, an air inlet is provided at the upper end of the silencer, an air inlet pipe is provided on the inlet, the air inlet pipe is connected to the exhaust pipe of the diesel generator, and a water inlet pipe is provided on the side wall of the silencer, which can be connected to the cooling pipe of the diesel generator. The design of this structure facilitates the installation or modification of the existing diesel generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a silencer of the utility model;

[0025] Figure 2 It is a cross-sectional structure and a three-dimensional structure schematic diagram of another structure of the silencer of the utility model;

[0026] Figure 3 A schematic diagram of the structure of a sound-absorbing net with regular polygonal sound-absorbing holes of the utility model;

[0027] Figure 4 A schematic diagram of the structure of the exhaust system of a diesel generator of the utility model;

[0028] Figure 5 A cross-sectional structural schematic diagram of the exhaust system of a diesel generator of the utility model;

[0029] Figure 6 For the utility model Figure 5 Schematic diagram of the enlarged local structure at A.

[0030] In the figure:

[0031] 100-silencer, 101-silencer chamber, 102-air inlet, 103-spiral guide groove, 110-smoke exhaust pipe, 120-water inlet pipe; 200-silencer net, 210-silencer hole; 300-inlet pipe;

[0032] 400-gas-liquid separation mechanism, 410-gas-liquid separator, 411-input port, 412-output port, 413-drain port, 414-water retaining plate, 420-drain pipe, 430-filter screen;

[0033] 500-water circulation mechanism, 510-water pump, 520-cooling pipe, 530-reflux pipe, 540-three-way joint, first joint, 542-second joint, 543-third joint, 550-water supply pipe, 560-first ball valve, 570-second ball valve. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Reference Figures 1 to 3 As shown, the utility model discloses a wet type muffler. The wet type muffler comprises a muffler 100, a muffler net 200 and an air inlet pipe 300, wherein the muffler 100 is provided with a muffler chamber 101, and an air inlet 102 is provided at the upper end of the muffler 100; a smoke exhaust pipe 110 is provided at the lower end of the muffler 100, and a water inlet pipe 120 is provided on the side wall of the muffler 100; the muffler net 200 is provided in the muffler chamber 101, and the outer peripheral wall of the muffler net 200 abuts against the inner peripheral wall of the muffler 100; a plurality of muffler holes 210 are provided on the muffler net 200; and the air inlet pipe 300 is provided on the air inlet 102, and the lower end of the air inlet pipe 300 passes through the air inlet 102 and extends into the muffler chamber 101. Specifically, the wet silencer pipe includes a silencer 100, a silencer net 200 and an air inlet pipe 300, wherein the silencer 100 is provided with a silencer chamber 101, an air inlet 102 is provided at the upper end of the silencer 100, and the lower end of the air inlet pipe 300 extends into the silencer chamber 101 through the air inlet 102, and the silencer net 200 is provided in the silencer chamber 101, and the outer peripheral wall of the silencer net 200 abuts against the inner peripheral wall of the silencer 100; a plurality of silencer holes 210 are provided on the silencer net 200. Through the design of this structure, after the smoke of the diesel generator enters the silencer chamber 101, part of the sound energy is converted into heat energy and dissipated by friction in the silencer holes 210, which has a good noise reduction effect. The side wall of the silencer 100 is provided with a water inlet pipe 120, and the liquid medium can be injected into the silencer chamber 101 through the water inlet pipe 120. In this embodiment, the liquid medium can be cooling water of the cooling pipeline in the diesel generator, or it can be a mixed solution with an alkaline solution added. The purpose of desulfurization is achieved by reacting the sulfur oxides in the flue gas with the alkaline solution to generate sulfates or sulfites. In addition, the particulate matter in the liquid medium can be mixed in the liquid medium, thereby reducing the emission of harmful gases. Through the design of this mechanism, while reducing noise, it can absorb part of the harmful gases and at the same time reduce the temperature of the silencer 100, thereby increasing the service life and reducing the maintenance or replacement cost.

[0039] In some embodiments of the present invention, the axis of the water inlet pipe 120 is tangent to the inner wall of the silencer 100; the projections of the axis of the water inlet pipe 120 and the axis of the silencer 100 on the vertical plane have an angle α, where 30°≤α≤60°.

[0040] Reference Figure 1 and Figure 2As shown, the projection of the axis of the water inlet pipe 120 and the axis of the silencer 100 on the vertical plane has an angle α, wherein 30°≤α≤60°. Specifically, in this embodiment, the silencer 100 is usually installed vertically, that is, the axis of the silencer 100 is vertically arranged. In this embodiment, the angle α is the acute angle between the axis of the water inlet pipe 120 and the axis of the silencer 100 in the vertical direction. Specifically, in this embodiment, the angle α is 30°. By tilting the water inlet pipe 120, not only can the backflow of the liquid medium be avoided, but also the contact time and contact area between the liquid medium and the silencer 100 can be increased. When the liquid medium moves on the surface of the silencer 100 and the silencer net 200, it can absorb the problems generated by the smoke passing through. Through heat exchange, the temperature of the silencer 100 and the silencer net 200 can be reduced, and the contact area between the liquid medium and the smoke can be increased, so that the harmful substances or particulate matter in the smoke can be fully dissolved in the liquid medium.

[0041] Reference Figure 2 As shown, in this embodiment, the silencer 100 is provided with a silencer chamber 101, and the silencer net 200 is provided in the silencer chamber 101, and the outer peripheral wall of the silencer net 200 abuts against the inner peripheral wall of the silencer 100; the side wall of the silencer 100 is provided with a water inlet pipe 120, and the axis of the water inlet pipe 120 is tangent to the inner peripheral wall of the silencer 100. Specifically, in this embodiment, the axis of the water inlet pipe 120 is tangent to the inner peripheral wall of the silencer 100, and when the liquid medium enters the silencer chamber 101 through the water inlet pipe 120, the liquid medium can form a vortex along the inner peripheral wall of the silencer 100, and fully contact with the inner peripheral wall of the silencer 100, thereby improving the heat exchange effect and the dissolution effect of harmful particles.

[0042] In some embodiments of the present invention, a spiral guide groove 103 is provided on the inner circumferential wall of the silencer 100 , and the spiral guide groove 103 and the water inlet pipe 120 are smoothly transitioned.

[0043] Reference Figure 2As shown, the silencer 100 is provided with a silencer chamber 101, and the silencer net 200 is arranged in the silencer chamber 101, and the outer peripheral wall of the silencer net 200 abuts against the inner peripheral wall of the silencer 100; the side wall of the silencer 100 is provided with a water inlet pipe 120, and the axis of the water inlet pipe 120 is tangent to the inner peripheral wall of the silencer 100, and the inner peripheral wall of the silencer 100 is provided with a spiral guide groove 103, and the connection between the water inlet pipe 120 and the inner peripheral wall of the silencer 100 is smoothly transitioned with the spiral guide groove 103. In order to prevent the silencer net 200 from moving relative to the silencer tube 100, the silencer net 200 and the silencer tube 100 are usually fitted in an interference fit manner so that the silencer net 200 can fit tightly against the inner wall of the silencer tube 100. However, with the design of this structure, the liquid medium can only enter the silencer chamber 101 through the silencer hole 210, and cannot flow through the gap between the silencer net 200 and the silencer tube 100, which makes it difficult for the liquid medium to flow, thereby reducing the efficiency of heat exchange. In this embodiment, by providing a spiral guide groove 103, the liquid medium can form a spiral flow between the silencer net 200 and the silencer tube 100 through the spiral guide groove 103, thereby improving the efficiency of heat exchange.

[0044] In some embodiments of the present invention, the muffler hole 210 is a circular hole or a regular polygonal hole.

[0045] Reference Figure 1 As shown, the silencer net 200 is a cylindrical structure. The silencer net 200 is made of metal material, such as steel plate. When processing the silencer net 200, punching holes can be performed on the metal plate, and then the silencer net 200 is rolled into a cylindrical structure by a plate rolling machine. In this embodiment, the silencer hole 210 can be a circular hole. The circular hole is convenient for processing and production, thereby saving production costs; in this embodiment, the silencer hole 210 can be a regular polygonal hole. Specifically, the silencer hole 210 is a regular hexagonal deformation hole. The silencer net 200 is provided with a regular polygonal hole. Part of the sound energy is converted into heat energy by friction in the silencer hole 210 and dissipated. Compared with the circular hole, the noise reduction effect is better.

[0046] In some embodiments of the utility model, the silencer net 200 is made of composite ceramics. In this embodiment, the silencer net 200 can be integrally formed of composite ceramics. The silencer net 200 made of composite ceramics has good high temperature resistance and can maintain good performance in the high temperature environment of the silencer chamber 101. The silencer net 200 made of composite ceramics has high strength and high hardness, and can withstand processes such as cutting or drilling when the silencer net 200 is made. The silencer net 200 made of composite ceramics has good corrosion resistance, and the composite ceramics have good resistance to the smoke generated by diesel generators. The silencer net 200 made of composite ceramics has a low thermal expansion coefficient: the thermal expansion coefficient of composite ceramics is small, which means that their volume changes are small when the temperature changes, which is conducive to maintaining the accuracy and stability of the silencer 100.

[0047] In some embodiments of the present invention, the extending length of the air intake pipe 300 is L1, and the height of the silencer 100 is L2, wherein L1=k*L2, K is the length coefficient, 0.2≤K≤0.8.

[0048] Reference Figure 1 As shown, the silencer 100 is provided with a silencer chamber 101, an air inlet 102 is provided at the upper end of the silencer 100, the lower end of the air inlet pipe 300 passes through the air inlet 102 and extends into the silencer chamber 101, and the silencer net 200 is provided in the silencer chamber 101, the outer peripheral wall of the silencer net 200 abuts against the inner peripheral wall of the silencer 100; and a plurality of silencer holes 210 are provided on the silencer net 200. In this embodiment, the diameter of the air inlet pipe 300 is smaller than the diameter of the silencer 100, and a variable diameter pipeline is used, and the principle of resistive noise reduction is utilized. The sudden change of the cross section of the air inlet pipe 300 and the pipe of the silencer 100 makes the noise of some frequencies or frequency bands propagating along the pipe partially reflected back, so that some noise cannot pass through the silencer 100. At the same time, through the silencer holes 210 on the silencer net 200, the noise reduction combination of impedance composite is utilized, which can improve the noise reduction effect.

[0049] In this embodiment, the air intake pipe 300 and the silencer 100 can be an integrated structure. Specifically, the silencer net 200 is installed in the silencer 100 and then the air intake pipe 300 is welded to the silencer 100. Through the design of this structure, the structure and process are relatively simple, which reduces the production cost.

[0050] In this embodiment, the air intake pipe 300 can also be installed in a movable manner and inserted into the silencing chamber 101 through the air intake hole. Under the premise of ensuring the sealing, the extension length of the air intake pipe 300 can be reciprocated by a linear drive such as a cylinder, an electric cylinder and the like. The design of this structure is adopted to control the extension length of the air intake pipe 300. By continuously changing the air extension length, most of the noise can be filtered out. Through the design of this mechanism, the noise reduction ability is better.

[0051] Reference Figures 4 to 6 As shown, the utility model also proposes a diesel generator exhaust system, which should have the wet silencer of the first aspect. In this embodiment, the wet silencer is provided with a silencer 100, an air intake pipe 300 is provided at the upper end of the silencer 100, a smoke exhaust pipe 110 is provided at the lower end of the silencer 100, and a water inlet pipe 120 is provided on the side wall of the silencer 100; it is connected to the exhaust pipeline of the diesel generator through the air intake pipe 300, and can be connected to the cooling pipe 520 of the diesel generator through the water inlet pipe 120. Through the design of this mechanism, the wet silencer in the embodiment of the first aspect can be directly connected to the exhaust pipeline and cooling pipe 520 of the generator for use, and the structure is simple, which is convenient for the installation of new equipment or the modification of old equipment.

[0052] In some embodiments of the present utility model, the diesel generator exhaust system further includes a gas-liquid separation mechanism 400 and a water circulation mechanism 500;

[0053] The gas-liquid separation mechanism 400 includes a gas-liquid separator 410, a drain pipe 420 and a filter 430. The gas-liquid separator 410 is provided with an input port 411, an output port 412 and a drain port 413. The input port 411 is connected to the smoke exhaust pipe 110, the drain port 413 is connected to the drain pipe 420, and the filter 430 is provided on the drain port 413.

[0054] The water circulation mechanism 500 includes a water pump 510, a cooling pipe 520, a return pipe 530, a three-way joint 540, a water supply pipe 550, a first ball valve 560 and a second ball valve 570. One end of the cooling pipe 520 is connected to the drain pipe 420, and the other end of the cooling pipe 520 is connected to the input end of the water pump 510; the output end of the water pump 510 is connected to the return pipe 530; the return pipe 530 is connected to the first joint 541 of the three-way joint 540, the second joint 542 of the three-way joint 540 is connected to the water supply pipe 550, and the third joint 543 of the three-way joint 540 is connected to the water inlet pipe 120; the first ball valve 560 is arranged on the return pipe 530, and the second ball valve 570 is arranged on the water supply pipe 550.

[0055] Specifically, in the present embodiment, the exhaust system of the diesel generator includes a wet silencer pipe, a gas-liquid separation mechanism 400 and a water circulation mechanism 500. Specifically, under normal working conditions, the smoke of the diesel generator enters the silencer chamber 101 of the silencer 100 through the air inlet pipe 300. At the same time, the liquid medium enters the silencer chamber 101 of the silencer 100 through the water inlet pipe 120, and completes contact and noise reduction in the silencer chamber 101. The mixed medium enters the gas-liquid separation mechanism 400 through the smoke exhaust pipe 110. Specifically, the mixed medium enters the gas-liquid separator 410 and completes gas-liquid separation. The separated gas is discharged through the output port 412 of the gas-liquid separator 410, and the separated liquid enters the drain pipe 420 through the drain port 413. The separated liquid can filter impurities at the same time when passing through the drain port 413; further, the separated liquid enters the water circulation mechanism 500 through the drain pipe 420. Specifically, the separated liquid enters the cooling pipe 520 through the drain pipe 420, and is lifted to a high position by the water pump 510, and is then injected into the water supply pipe 550 through the three-way joint 540 and the water inlet pipe 120 and re-injected into the muffler chamber 101. Repeat the above working process under normal working conditions.

[0056] In normal working state, the second ball valve 570 on the water supply pipe 550 is closed, and the liquid medium is circulated in the wet silencer pipe, the gas-liquid separation mechanism 400 and the water circulation mechanism 500. The design of this structure can circulate the liquid medium, thereby protecting water resources.

[0057] In the water replenishment state, the second ball valve 570 on the water replenishment pipe 550 is opened, the first ball valve 560 is closed, and the water replenishment pipe 550 connected to the cooling pipe 520 of the diesel generator can replenish the cooling water in the cooling pipe 520 into the exhaust system of the diesel generator, thereby ensuring that the liquid medium in the silencing chamber 101 is always kept full.

[0058] In some embodiments of the utility model, the gas-liquid separator 410 is provided with a water baffle 414 between the input port 411 and the output port 412, and the axis of the drain port 413 is tilted and faces the input port 411; the water baffle 414 is tilted, and the tilt direction of the water baffle 414 is the same as the axis of the drain port 413. Specifically, when the mixed medium passes through the gas-liquid separator 410, it can smoothly enter the drain port 413 under the cooperation of gravity and its own kinetic energy, and the gas medium can enter the oil input port 411 and the output port 412 for discharge. In this embodiment, by providing the water baffle 414 between the input port 411 and the output port 412, the kinetic energy of the liquid medium passing through the gas-liquid separator 410 can be reduced, so that most of the liquid medium can enter the drain port 413.

[0059] In some embodiments of the present invention, the cooling pipe 520 is provided with a plurality of S-shaped pipe sections. By providing the S-shaped pipe sections, the passage path of the liquid medium can be extended, thereby improving the heat dissipation efficiency.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A wet silencer pipe, characterized in that: include: A silencer (100), wherein the silencer (100) is provided with a silencer chamber (101), and an air inlet (102) is provided at the upper end of the silencer (100); a smoke exhaust pipe (110) is provided at the lower end of the silencer (100), and a water inlet pipe (120) is provided on the side wall of the silencer (100); a silencer net (200), the silencer net (200) being arranged in the silencer chamber (101), the outer peripheral wall of the silencer net (200) abutting against the inner peripheral wall of the silencer cylinder (100); and a plurality of silencer holes (210) being arranged on the silencer net (200); An air intake pipe (300), the air intake pipe (300) being arranged on the air intake port (102), and the lower end of the air intake pipe (300) passing through the air intake port (102) and extending into the muffler chamber (101).

2. The wet type muffler pipe according to claim 1, characterized in that: The axis of the water inlet pipe (120) is tangent to the inner circumferential wall of the silencer (100); the projections of the axis of the water inlet pipe (120) and the axis of the silencer (100) on a vertical plane have an angle α, wherein 30°≤α≤60°.

3. The wet type muffler pipe according to claim 2, characterized in that: A spiral guide groove (103) is provided on the inner peripheral wall of the silencer cylinder (100), and the spiral guide groove (103) and the water inlet pipe (120) are smoothly transitioned.

4. The wet type muffler pipe according to claim 1, characterized in that: The muffler hole (210) is a circular hole or a regular polygonal hole.

5. The wet type muffler pipe according to claim 4, characterized in that: The sound-absorbing net (200) is made of composite ceramics.

6. The wet type muffler pipe according to claim 1, characterized in that: The extension length of the air intake pipe (300) is L1, and the height of the silencer (100) is L2, wherein L1=k*L2, K is the length coefficient, and 0.2≤K≤0.

8.

7. A diesel generator exhaust system, characterized in that: A wet silencer pipe comprising any one of claims 1 to 6.

8. The diesel generator exhaust system according to claim 7, characterized in that: The diesel generator exhaust system further comprises a gas-liquid separation mechanism (400) and a water circulation mechanism (500); The gas-liquid separation mechanism (400) comprises a gas-liquid separator (410), a drain pipe (420) and a filter net (430); the gas-liquid separator (410) is provided with an input port (411), an output port (412) and a drain port (413); the input port (411) is connected to the smoke exhaust pipe (110); the drain port (413) is connected to the drain pipe (420); and the filter net (430) is provided on the drain port (413); The water circulation mechanism (500) comprises a water pump (510), a cooling pipe (520), a return pipe (530), a three-way joint (540), a water supply pipe (550), a first ball valve (560) and a second ball valve (570); one end of the cooling pipe (520) is connected to the drain pipe (420), and the other end of the cooling pipe (520) is connected to the input end of the water pump (510); the output end of the water pump (510) is connected to the return pipe (530); 0); the return pipe (530) is connected to the first joint (541) of the three-way joint (540), the second joint (542) of the three-way joint (540) is connected to the water supply pipe (550), and the third joint (543) of the three-way joint (540) is connected to the water inlet pipe (120); the first ball valve (560) is arranged on the return pipe (530), and the second ball valve (570) is arranged on the water supply pipe (550).

9. The diesel generator exhaust system according to claim 8, characterized in that: The gas-liquid separator (410) is provided with a water baffle (414) between the input port (411) and the output port (412); the axis of the drain port (413) is arranged at an inclination and faces the input port (411); the water baffle (414) is arranged at an inclination, and the inclination direction of the water baffle (414) is the same as the axis of the drain port (413).

10. The diesel generator exhaust system according to claim 8, characterized in that: The cooling pipe (520) is provided with a plurality of S-shaped pipe sections.

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