Tail gas purification device for marine diesel engine

Abstract

The utility model provides a marine diesel engine tail gas purification device which comprises a first barrel, a second barrel, a third barrel and a driving motor, the output end of the driving motor is connected with a rotating shaft, a filtering assembly is installed on the rotating shaft, and an arc-shaped installation groove is formed in the inner side of the second barrel and is formed in the side close to the first barrel; the spray head assembly is mounted in the arc-shaped mounting groove, and the top side is externally connected with an external water inlet pipe; one end of the scraping plate is mounted on the rotating shaft, and the scraping plate abuts against the inner wall of the second barrel; the first through hole is formed in the bottom side of the second cylinder body and is formed in the bottom side of the scraping plate; the collecting box is mounted on the bottom side of the first through hole. According to the tail gas purification device for the marine diesel engine, particle sediments on the filtering assembly and the second barrel can be effectively cleaned through the scraper, the nozzle assembly and the filtering assembly, accumulation of the particle sediments is avoided, the cleaning efficiency of workers is improved, meanwhile, the normal exhaust speed and the purification effect of tail gas can be guaranteed, and the service life of the tail gas purification device is prolonged. And the influence on used equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a marine diesel engine tail gas purification device. Background Art

[0002] Prior art, Patent No. 202220903651 discloses a device for purifying exhaust gas emitted by a marine diesel engine. By setting a driving motor, a first filter screen, a second filter screen, a connecting pipe and a nozzle, the first filter screen and the second filter screen in the device are in motion, thereby preventing the first filter screen and the second filter screen from being easily blocked. At the same time, the centrifugal force generated by the rotation can effectively clean itself, thereby ensuring the filtering effect of the first filter screen and the second filter screen, so that the filter screen of the device can still remain unobstructed after long-term use, avoiding blockage, ensuring the normal removal speed and purification effect of the exhaust gas, and avoiding affecting the equipment used.

[0003] In the above technology, after the nozzle sprays water mist, the particles coming out of the air inlet pipe are easily mixed with the water mist and attached to the inner wall of the first cylinder. As time goes by, the particles continue to accumulate and deposit, making it inconvenient for staff to clean the inner wall of the first cylinder. Utility Model Content

[0004] In view of the above problems, the utility model provides a marine diesel engine exhaust purification device to solve the problem that the exhaust gas particles and water mist are easily mixed and attached to the inner wall of the first cylinder in the existing marine diesel engine exhaust purification device, which is inconvenient for the staff to clean it up daily.

[0005] A marine diesel engine exhaust purification device comprises a first cylinder, a second cylinder and a third cylinder connected in sequence, wherein the first cylinder is provided with an air inlet pipe, the third cylinder is provided with an air outlet pipe, and a driving motor is arranged on the outside of the third cylinder, the output end of the driving motor is connected with a rotating shaft, the rotating shaft passes through the third cylinder, and is extended and fixed to the second cylinder, and a filter assembly is installed on the rotating shaft. The marine diesel engine exhaust purification device also comprises: an arc-shaped installation groove, which is arranged on the inner side of the second cylinder and is arranged on the side close to the first cylinder; a nozzle assembly, which is installed in the arc-shaped installation groove and the top side is connected to an external water inlet pipe; a scraper, one end of which is installed on the rotating shaft and the other end is arranged between the first cylinder and the arc-shaped installation groove, and the scraper is arranged against the inner wall of the second cylinder; a first through hole, which is arranged on the bottom side of the second cylinder and is arranged on the bottom side of the scraper; a collecting box, which is installed on the bottom side of the first through hole.

[0006] Preferably, the nozzle assembly further comprises: a water inlet pipe, connected to the external water inlet pipe;

[0007] The arc-shaped conduit is installed in the arc-shaped installation groove, and the top side is connected to the water inlet pipe; a plurality of nozzles are arranged on the inner side of the arc-shaped conduit and are connected to the arc-shaped conduit.

[0008] Preferably, the filter assembly includes: a first filter screen having a circular structure, the inner side of which is fixed on the rotating shaft, and the outer side is rotatably connected to the first arc groove of the second cylinder; a second filter screen having a circular structure, which is installed on the side of the first filter screen away from the first cylinder, and the inner side is fixed on the rotating shaft, and the outer side is rotatably connected to the second arc groove of the second cylinder.

[0009] Preferably, the first filter is arranged on the top side of the first through hole; a second through hole is opened on the second cylinder at the bottom side of the second filter, and the second through hole is connected to the collection box.

[0010] Preferably, the mesh diameter of the second filter is smaller than the mesh diameter of the first filter, and the nozzle is configured as an atomizing nozzle.

[0011] Preferably, the marine diesel engine exhaust purification device further comprises: a fan blade, which is arranged on a side of the second filter screen close to the third cylinder and fixed on the rotating shaft.

[0012] Preferably, the filter assembly includes: a filter element, which is arranged on a side of the fan blade close to the third cylinder and is sleeved on the outside of the rotating shaft.

[0013] Preferably, the marine diesel engine exhaust purification device further comprises: an oxidation catalyst disposed in the first cylinder.

[0014] The utility model marine diesel engine exhaust purification device has the following technical effects:

[0015] 1. The marine diesel engine exhaust purification device of the present application can effectively clean the particle sediment attached to the filter assembly and the second cylinder through the scraper, nozzle assembly, and filter assembly, avoid the accumulation of particle sediment, and improve the cleaning efficiency of the staff.

[0016] 2. The marine diesel engine exhaust purification device of the present application can ensure the normal exhaust gas removal speed and purification effect through the nozzle assembly and the filter assembly, and avoid affecting the equipment used.

[0017] 3. The marine diesel engine exhaust purification device of the present application can increase the range of the scraper to clean the particle sediment, improve the cleaning efficiency, and prevent the nozzle assembly from being attached to the particle sediment by installing the nozzle assembly in the arc-shaped installation groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other characteristics, features and advantages of the present invention will become clear by reading the following description of the exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Structural diagram of the utility model marine diesel engine exhaust purification device;

[0020] Figure 2 Internal structure diagram of the embodiment 1-3 of the marine diesel engine exhaust purification device of the utility model;

[0021] Figure 3 Internal structure diagram of the second cylinder of Embodiment 1-3 of the marine diesel engine exhaust purification device of the utility model;

[0022] Figure 4 Structural diagram of the nozzle assembly of the marine diesel engine exhaust purification device of the utility model;

[0023] Figure 5 Internal structure diagram of embodiment 4 of the marine diesel engine exhaust purification device of the utility model;

[0024] Figure 6 A structural diagram of a marine diesel engine exhaust purification device embodiment 4 of the utility model without a nozzle assembly installed;

[0025] Figure 7 An enlarged view of position A of the marine diesel engine exhaust purification device of the utility model.

[0026] In the figure: 10, first cylinder; 20, second cylinder; 30, third cylinder; 11, air inlet pipe; 31, air outlet pipe; 40, drive motor; 41, rotating shaft; 50, filter assembly; 21, arc-shaped mounting groove; 60, nozzle assembly; 61, water inlet pipe; 42, scraper; 22, first through hole; 23, collecting box; 51, first filter screen; 24, first arc-shaped groove; 52, second filter screen; 25, second arc-shaped groove; 26, second through hole; 62, arc-shaped conduit; 63, nozzle; 43, fan blade; 53, filter element; 12, oxidation catalyst. Implementation

[0027] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0028] The marine diesel engine exhaust purification device is described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0029] like Figure 1-3 The exhaust gas purification device for a marine diesel engine shown in the figure comprises a first cylinder 10, a second cylinder 20, and a third cylinder 30 connected in sequence, wherein an air inlet pipe 11 is arranged on the first cylinder 10, an air outlet pipe 31 is arranged on the third cylinder 30, and a driving motor 40 is arranged outside the third cylinder 30, and a rotating shaft 41 is connected to the output end of the driving motor 40, the rotating shaft 41 passes through the third cylinder 30, and is extended and fixed to the second cylinder 20, and a filter assembly 50 is installed on the rotating shaft 41. The exhaust gas purification device for a marine diesel engine also It includes: an arc-shaped installation groove 21, which is opened on the inner side of the second cylinder 20 and is opened on the side close to the first cylinder 10; a nozzle assembly 60, which is installed in the arc-shaped installation groove 21 and is connected to the external water inlet pipe on the top side; a scraper 42, one end of which is installed on the rotating shaft 41, and the other end is arranged between the first cylinder 10 and the arc-shaped installation groove 21, and the scraper 42 is arranged to abut against the inner wall of the second cylinder 20; a first through hole 22, which is opened on the bottom side of the second cylinder 20 and is arranged on the bottom side of the scraper 42; a collecting box 23, which is installed on the bottom side of the first through hole 22.

[0030] When working, after the exhaust gas generated by the diesel engine enters the first cylinder 10 through the intake pipe 11, its particles are mixed, condensed and settled by the water mist from the nozzle assembly 60, and a part of them is attached to the filter assembly 50, and the other part is attached to the inner wall of the second cylinder 20. As the driving motor 40 works, the particle sediment attached to the filter assembly 50 slowly separates from the filter assembly 50 due to centrifugal force and falls into the collection box 23 through the first through hole 22, and the particle sediment attached to the inner wall of the second cylinder 20 is cleaned by the scraper 42 and falls into the collection box 23 through the first through hole 22. The diesel engine exhaust purification device of the present application can effectively clean the particle sediment on the filter assembly 50 and the second cylinder 20, avoid the accumulation of particle sediment, and avoid the blockage phenomenon. At the same time, it can ensure the normal exhaust speed and purification effect of the exhaust gas, and avoid affecting the use of the equipment.

[0031] At the same time, if the nozzle assembly 60 is only installed on the inner wall of the second cylinder 20, the nozzle assembly 60 is easily attached by particle sediment. When the nozzle assembly 60 is installed in the arc-shaped installation groove 21, the range of the scraper 42 to clean the particle attachment can be increased, thereby improving the cleaning efficiency.

[0032] Embodiment 2 is a preferred embodiment of Embodiment 1, and specifically describes the structure and position of the nozzle assembly 60, including:

[0033] The nozzle assembly 60 includes: a water inlet pipe 61, an arc-shaped conduit 62, and a plurality of nozzles 63. The water inlet pipe 61 is connected to an external water inlet pipe; the arc-shaped conduit 62 is installed in the arc-shaped installation groove 21, and its top side is connected to the water inlet pipe 61; a plurality of nozzles 63 are arranged on the inner side of the arc-shaped conduit 62 and are connected to the arc-shaped conduit 62, wherein the nozzle is configured as an atomizing nozzle.

[0034] When working, the external water inlet pipe is connected to the water inlet pipe 61, and the clean water is sprayed into the second cylinder 20 through the arc-shaped conduit 62 and the nozzle 63. Since the arc-shaped conduit 62 has an arc-shaped structure, the water mist generated by the nozzle 63 can mix and cover the particle sediment flowing into the second cylinder 20 as much as possible.

[0035] Embodiment 3 is a preferred embodiment of Embodiment 1, and specifically describes the structure and position of the filter assembly 50, including:

[0036] The filter assembly 50 includes: a first filter screen 51, a second filter screen 52, and a filter element 53. The first filter screen 51 is a circular structure, the inner side of which is fixed on the rotating shaft 41, and the outer side is rotatably connected to the first arc groove 24 of the second cylinder 20, and the first filter screen 51 is arranged on the top side of the first through hole 22; the second filter screen 52 is a circular structure, installed on the side of the first filter screen 51 away from the first cylinder 10, and the inner side is fixed on the rotating shaft 41, and the outer side is rotatably connected to the second arc groove 25 of the second cylinder 20, and the second through hole 26 is opened on the second cylinder 20 at the bottom side of the second filter screen 52, and the second through hole 26 is connected to the collection box 23. Specifically, the mesh diameter of the second filter screen 52 is smaller than the mesh diameter of the first filter screen 51; the filter element 53 is arranged on the side of the fan blade 43 close to the third cylinder 30, and is sleeved on the outer side of the rotating shaft 41.

[0037] When working, the diesel engine exhaust particulate matter first passes through the first filter 51 and the second filter 52. As the drive motor 40 works, the first filter 51 and the second filter 52 are subjected to centrifugal force, and the attached particulate matter is thrown into the collection box 23. The particulate matter that is not intercepted is further filtered under the action of the filter element 53, thereby ensuring that the exhaust particulate matter is fully filtered, ensuring the normal exhaust removal speed and purification effect, and avoiding affecting the equipment in use.

[0038] Since the mesh diameter of the second filter 52 is smaller than the mesh diameter of the first filter 51, and the filtering capacity of the filter element 53 is higher than that of the second filter 52, it can ensure that the exhaust particulate matter can be fully processed, and the first filter 51 and the second filter 52 are respectively rotatably arranged in the second arc groove 25, which can avoid the particulate matter from escaping into the filter element 53 as much as possible.

[0039] The scraper 42 is fixed to the first filter screen 51 by screws.

[0040] In actual use, a partition may be provided in the collection box 23 to separate the first through hole from the second through hole, thereby preventing particles from bypassing the first filter screen 51 from the collection box 23 .

[0041] Embodiment 4 is an improvement on Embodiment 1, and the improvement includes:

[0042] The marine diesel engine exhaust purification device further includes: a fan blade 43 , which is arranged on a side of the second filter screen 52 close to the third cylinder 30 and fixed on the rotating shaft 41 .

[0043] If the fan blade 43 is arranged on the side close to the nozzle assembly 60, the exhaust gas particles are easily combined with the water mist and attached to the fan blade 43. If the fan blade 43 is arranged on the side of the second filter screen 52 close to the third cylinder 30, since the exhaust gas particles have been filtered by the first filter screen 51 and the second filter screen 52, the problem can be avoided.

[0044] When actually used, the marine diesel engine exhaust purification device further includes: an oxidation catalyst 12 disposed in the first cylinder 10 .

[0045] Working principle of the marine diesel engine exhaust purification device in this application

[0046] When working, the external water inlet pipe is connected to the water inlet pipe 61, and the clean water is sprayed into the second cylinder 20 through the arc-shaped guide tube 62 and the nozzle 63, and the driving motor 40 is started. The exhaust gas generated by the diesel engine enters the first cylinder 10 through the air inlet pipe 11, and is first processed by the oxidation catalyst 12, and then its particles are mixed, condensed and settled by the water mist from the nozzle assembly 60, and part of them are attached to the filter assembly 50, and part of them are attached to the inner wall of the second cylinder 20. The particle sediment attached to the filter assembly 50 slowly separates from the filter assembly 50 due to centrifugal force and falls into the collection box 23 through the first through hole 22, and the particle sediment attached to the inner wall of the second cylinder 20 is cleaned by the scraper 42 and falls into the collection box 23 through the first through hole 22. The exhaust gas filtered by the first filter 51 and the second filter 52 is further filtered by the filter element 53 and flows out from the outlet pipe 31 on the third cylinder 30. The entire device can effectively clean the particulate sediment on the filter assembly 50 and the second cylinder 20, avoid the accumulation of particulate sediment, avoid blockage, ensure the normal exhaust gas removal speed and purification effect, and avoid affecting the equipment in use.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0048] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. The utility model is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, and all should be included in the scope of the claims of the utility model.

Claims

1. A marine diesel engine exhaust purification device, comprising a first cylinder (10), a second cylinder (20), and a third cylinder (30) connected in sequence, wherein the first cylinder (10) is provided with an air inlet pipe (11), the third cylinder (30) is provided with an air outlet pipe (31), and a drive motor (40) is arranged outside the third cylinder (30), the output end of the drive motor (40) is connected with a rotating shaft (41), the rotating shaft (41) passes through the third cylinder (30), and is extended and fixed to the second cylinder (20), and a filter assembly (50) is installed on the rotating shaft (41), characterized in that: The marine diesel engine exhaust purification device also includes: An arc-shaped installation groove (21) is provided inside the second cylinder (20) and is provided on a side close to the first cylinder (10); A spray head assembly (60) is installed in the arc-shaped installation groove (21), and the top side is connected to an external water inlet pipe; A scraper (42), one end of which is mounted on the rotating shaft (41), and the other end of which is arranged between the first cylinder (10) and the arc-shaped mounting groove (21), and the scraper (42) is arranged to abut against the inner wall of the second cylinder (20); A first through hole (22) is formed on the bottom side of the second cylinder (20) and is arranged on the bottom side of the scraper (42); A collection box (23), installed on the bottom side of the first through hole (22); A partition is arranged inside the collecting box (23).

2. The marine diesel engine exhaust purification device according to claim 1, characterized in that: The spray head assembly (60) further comprises: A water inlet pipe (61) communicates with an external water inlet pipe; An arc-shaped conduit (62) is installed in the arc-shaped installation groove (21), and the top side is connected to the water inlet pipe (61); A plurality of nozzles (63) are arranged inside the arc-shaped conduit (62) and are in communication with the arc-shaped conduit (62).

3. The marine diesel engine exhaust purification device according to claim 1, characterized in that: The filter assembly (50) comprises: The first filter screen (51) is of circular structure, the inner side of which is fixed on the rotating shaft (41), and the outer side of which is rotatably connected to the first arc-shaped groove (24) of the second cylinder (20); The second filter screen (52) is circular in structure and is installed on a side of the first filter screen (51) away from the first cylinder (10), with its inner side fixed on the rotating shaft (41) and its outer side rotatably connected to the second arc groove (25) of the second cylinder (20).

4. The marine diesel engine exhaust purification device according to claim 3, characterized in that: The first filter screen (51) is arranged on the top side of the first through hole (22); The second cylinder (20) at the bottom side of the second filter screen (52) is provided with a second through hole (26), and the second through hole (26) is connected to the collection box (23).

5. The marine diesel engine exhaust purification device according to claim 3, characterized in that: The mesh diameter of the second filter screen (52) is smaller than the mesh diameter of the first filter screen (51), and the nozzle is configured as an atomizing nozzle.

6. The marine diesel engine exhaust purification device according to claim 5, characterized in that: The marine diesel engine exhaust purification device also includes: The fan blade (43) is arranged on a side of the second filter screen (52) close to the third cylinder (30) and is fixed on the rotating shaft (41).

7. The marine diesel engine exhaust purification device according to claim 6, characterized in that: The filter assembly (50) comprises: The filter element (53) is arranged on a side of the fan blade (43) close to the third cylinder (30) and is sleeved on the outside of the rotating shaft (41).

8. The marine diesel engine exhaust purification device according to claim 1, characterized in that: The marine diesel engine exhaust purification device also includes: An oxidation catalyst (12) is arranged in the first cylinder (10).

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