CN115324688B

CN115324688B - Tail gas cooperative purification device for marine diesel engine and application method thereof

Info

Publication number: CN115324688B
Application number: CN202210970866.XA
Authority: CN
Inventors: 姚潞
Original assignee: Nantong University
Current assignee: Nantong University
Priority date: 2022-08-14
Filing date: 2022-08-14
Publication date: 2023-06-16
Anticipated expiration: 2042-08-14
Also published as: CN115324688A

Abstract

The utility model discloses a tail gas cooperative purification device for a marine diesel engine, which comprises a base, wherein a first purification box is arranged at the top of the base, and a shunt pipe is connected in a sealing manner in the connecting port; the utility model discloses a catalytic converter, including shunt tubes, baffle ring, honeycomb molecular sieve, barrier ring, active carbon granule, the inside of evenly arranging has been placed to the inside of pocket, the honeycomb molecular sieve has been placed to the inside of pocket, the outer surface of barrier ring has been cup jointed and has been installed the snap ring. According to the utility model, the first purifying box, the oxidation type catalyst, the activated carbon particles and the honeycomb molecular sieve are arranged, the diesel engine and the shunt pipe are connected together through the oxidation type catalyst, and in the subsequent tail gas purifying process, the honeycomb molecular sieve, the activated carbon particles and the oxidation type catalyst are used for carrying out primary filtration on the tail gas, so that the probability of blocking the filtering device in the subsequent purifying process is reduced.

Description

Tail gas cooperative purification device for marine diesel engine and application method thereof

Technical Field

The utility model relates to the technical field of tail gas treatment, in particular to a tail gas cooperative purification device for a marine diesel engine and a use method thereof.

Background

Most of the marine vessels use diesel engines as power devices, however, in the use process, as the tail gas of the diesel engines contains hundreds of different compounds, the gas has strange smell, can cause dizziness and nausea, affect the health and also have serious influence on the environment, and the conventional tail gas purifying device for the diesel engines is inconvenient for small vessels to use and has certain limitation, so that the tail gas synergistic purifying device for the marine diesel engines is urgently needed.

The defects of the existing tail gas cooperative purification device are as follows:

1. patent document CN210919207U discloses a high-efficient mining diesel engine tail gas cleanup unit, and it includes purifying box, defroster and intake pipe, purifying box's top is equipped with the gas outlet, and inside is equipped with purifying liquid, and the lateral wall outside is equipped with the diffusion room, the bottom of diffusion room and purifying box's bottom intercommunication, the one end of intake pipe is connected with diffusing room's top, and the other end is connected with mining diesel engine's blast pipe, the defroster is installed on purifying box's gas outlet. According to the utility model, the purifying liquid is utilized to adsorb soot particles in the tail gas of the diesel engine, toxic and harmful gases which are soluble in water in the tail gas are dissolved, and the purified tail gas is discharged to the atmosphere through the gas outlet after mist is removed by the mist eliminator, so that the secondary pollution is effectively avoided. The device can improve the tail gas purification efficiency of the mining diesel engine and ensure the physical health of underground operators, but the diesel engine tail gas purification device in the publication mainly considers how to improve the tail gas purification efficiency of the diesel engine, and does not consider the problem that the traditional tail gas cooperative purification device is easy to block when in use;

2. patent document CN216866827U provides an explosion-proof diesel engine exhaust gas purifying device, which comprises a sound insulation box, a cooling mechanism and a noise reduction mechanism; the cooling mechanism is arranged in the inner cavity of the sound insulation box, and the noise reduction mechanism is arranged on the surface of the sound insulation box; the inner chamber fixedly connected with clarifier body of sound insulation case, the inner chamber of sound insulation case is provided with the vacuum chamber, the bottom intercommunication of clarifier body has the intake pipe. The explosion-proof diesel engine tail gas purifying device is characterized in that the sound insulation box is arranged outside the purifier body in a covering mode, noise generated when the sound insulation box is used is blocked, noise propagation intensity of a diesel engine in the working process is reduced, noise in a working environment is smaller, noise is repeatedly refracted and weakened through the noise reduction pipe, the noise reduction bump and the noise reduction ball which are arranged in the noise reduction pipe, the noise reduction ball and the refraction block are mutually matched, the exhaust noise is discharged through the through hole, the exhaust noise is well reduced, the manual work is enabled to work in a good working environment, however, the diesel engine tail gas purifying device in the above publication mainly considers how to reduce the noise of the diesel engine tail gas purifying device in the working process, the existing tail gas collaborative purifying device is inconvenient to detect the purified tail gas after the tail gas is purified through puncturing, and the flexibility is poor;

3. patent document CN216866825U provides a diesel engine tail gas purification device that heat preservation effect is good, including DPF particulate filter, DPF particulate filter's surface detachably is provided with vacuum heat preservation section of thick bamboo, the surface fixed cover of vacuum heat preservation section of thick bamboo other end is equipped with the connecting cylinder, the inner wall fixedly connected with first guide holder of connecting cylinder, the inner wall fixedly connected with of connecting cylinder with the heat collection piece of first guide holder other end laminating, vacuum heat preservation section of thick bamboo's inside is provided with heat preservation mechanism. According to the diesel engine tail gas purifying device with good heat preservation effect, heat is conducted to heat preservation cotton through the heat conducting strips, heat can be preserved by utilizing the heat preservation cotton in the heat shield, so that the DOC oxidation catalyst can be kept at a certain temperature for a long time, the DOC oxidation catalyst and the DPF particle filter can be heated up more quickly, the automatic regeneration function of the filter element coating in the DOC oxidation catalyst can be fully exerted, however, the diesel engine tail gas purifying device in the above publication mainly considers how to improve the heat preservation performance of the purifying device, and the problem of low purifying efficiency caused by incomplete tail gas purification is not considered;

4. patent document CN216342407U discloses an explosion-proof diesel engine tail gas purification device, including main casing and the inside DOC catalyst converter of main casing, the main casing includes inside inlet layer, middle heat preservation and outside cooling layer, and inside inlet layer links DOC catalyst converter and forms the gas circuit chamber, and middle heat preservation layer interval sets up outside inside inlet layer and forms the heat preservation chamber, and outside cooling layer interval sets up outside middle heat preservation layer and forms the cooling chamber. The anti-explosion diesel engine tail gas purification device is provided with the three-layer main shell structure and has the functions of cooling and heat preservation, the outer layer reduces the surface temperature of the tail gas purification device through heat exchange of cooling water to achieve the purpose of explosion prevention, the middle layer prevents the tail gas from being influenced by the cooling of the outer layer before entering the DOC catalyst, heat loss is effectively reduced, the tail gas entering the DOC catalyst can reach the optimal reaction temperature, thereby the DOC catalyst fully reacts, the problem that the device is not applicable due to high temperature of the tail gas is solved, but the diesel engine tail gas purification device in the above publication mainly considers how to solve the problem that the device is not applicable due to high temperature of the tail gas, and the traditional tail gas purification device is inconvenient to disassemble and assemble the filter device inside the purification box when in use.

Disclosure of Invention

The utility model aims to provide a tail gas cooperative purification device for a marine diesel engine and a use method thereof, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the tail gas collaborative purification device for the marine diesel engine comprises a base, wherein a first purification box is installed at the top of the base and is L-shaped, a connecting port which is arranged front and back is penetrated through the outer wall of one side of the first purification box, and a shunt pipe is connected in a sealing manner in the connecting port;

an oxidation catalyst is arranged at one end of the shunt tube, an air inlet pipe is arranged on the outer wall of one side of the oxidation catalyst, a baffle ring is arranged on the outer surface of the air inlet pipe, a mesh bag is sleeved on the outer surface of the air inlet pipe, uniformly arranged activated carbon particles are placed in the mesh bag, a honeycomb molecular sieve is placed in the mesh bag, and the honeycomb molecular sieve is positioned on one side of the activated carbon particles;

the outer surface of the baffle ring is sleeved and connected with a clamping ring.

Preferably, the object placing table is installed on one side outer wall of the first purifying box, the object placing table is located above the side of the shunt tubes, the air storage box is placed at the top of the object placing table, the connecting pipe is installed on one side outer wall of the air storage box, the air transmission pipe I is installed on the inner surface of the connecting pipe, the vent holes are formed in the top of the air storage box in a penetrating mode, the fan box is installed at the top of the air storage box, the fan box is located on the outer side of the vent holes, the exhaust fan is installed in the inner portion of the fan box, the air transmission pipe II is installed at the top of the fan box, the first storing box is installed on the bottom wall of the air storage box, the servo motor is installed on the bottom wall of the first storing box, the porous net cover is installed at the output end of the servo motor in the penetrating mode, and the gas detection device is installed in the inner portion of the porous net cover.

Preferably, the purifying box II is installed at the top of purifying box I, and the gas-supply pipe III is installed to the back of purifying box II, and the filter screen plate is installed to one side inner wall of purifying box II, and storing box II is installed to the opposite side inner wall of purifying box II, and rotating electrical machines is installed to one side inner wall of storing box II, and the connecting rod is installed to rotating electrical machines's output, and the surface mounting of connecting rod has porous fibreboard, and porous fibreboard's surface spraying has the catalyst, and particle filter is installed to purifying box II's inner wall, and particle filter is located porous fibreboard's top.

Preferably, the opposite side outer wall of purifying box one runs through and is provided with the notch, and the inside slidable mounting of notch has a filter screen section of thick bamboo, and the surface mounting of filter screen section of thick bamboo has the silica gel that symmetrical arrangement to keep off the pad, and wherein one side outer wall that one set of silica gel kept off the pad is laminated mutually with one side inner wall of purifying box one, and another one side outer wall that another set of silica gel kept off the pad is laminated mutually with the opposite side inner wall of purifying box one, and the baffle is installed to the one end of filter screen section of thick bamboo, and baffle and notch gomphosis mutually.

Preferably, the honeycomb molecular sieve is embedded with the air inlet pipe, a conveying pipe is arranged on the inner surface of the mesh bag, the conveying pipe is positioned on one side of the honeycomb molecular sieve, the clamping rings are divided into an upper group and a lower group, the cross section of each clamping ring is of a concave structure, and the edge of the mesh bag is fixed on the outer surface of the baffle ring through the clamping rings;

the outer surfaces of the first gas pipe and the second gas pipe are respectively provided with an electronic valve I and an electronic valve II, the electronic valve I and the electronic valve II are electrically connected with the gas detection device, and the gas storage tank is connected with the outer wall of one side of the first purifying tank through a flange;

one end of the second air delivery pipe is connected with the outer wall of one side of the second purifying box, the bottom of the filter screen plate is connected with the bottom wall of the second purifying box, and the porous fiber plate is positioned on one side of the filter screen plate.

Preferably, the small desulfurization tower is arranged at the top of the base, the small desulfurization tower is positioned at the rear of the first purifying box, one ends of the first air pipe and the third air pipe are connected with the outer surface of the small desulfurization tower, the first air pipe is positioned at the rear of the third air pipe, and the top end of the small desulfurization tower is provided with the smoke exhaust pipe

Preferably, the front of the first purifying box is slidably provided with three groups of filter plates with the diameters decreasing in sequence from left to right, and the filter plates are positioned on one side of the filter screen cylinder.

Preferably, the shower is installed to the opposite side outer wall of purifying box one, and the one end of shower is connected with one side inner wall of purifying box one, and the shower is located the top of filter screen section of thick bamboo, and particle trap is installed to the inner wall of purifying box one, and the particle trap is located the top of shower.

Preferably, the working steps of the tail gas cooperative purification device are as follows:

s1, before the tail gas cooperative purification device is used, firstly selecting a proper filter plate according to requirements, plugging the filter plate into the first purification box, then placing activated carbon particles into a mesh bag, and then plugging the mesh bag into an air inlet pipe;

s2, enabling the tail gas subjected to primary filtration to enter the first purifying box through a shunt pipe, then enabling the tail gas to enter the first purifying box through the filter plate layer by layer for adsorption and filtration, and then entering the filter screen barrel, wherein in the process, a catalyst can be sprayed through a spray pipe, so that the reaction efficiency between the tail gas and the catalyst is increased, the tail gas enters the particle catcher after being catalyzed by the filter screen barrel and the catalyst, and therefore particles in the tail gas can be intercepted and adsorbed through the particle catcher;

s3, when the gas detection device detects that other harmful gases except sulfide exist in the tail gas, an exhaust fan in the fan box is started, the electronic valve II is opened, and then the tail gas in the gas storage tank can enter the purifying tank II through the gas transmission pipe II for secondary purification;

s4, when the gas detection device detects that the tail gas does not contain other harmful gases except sulfide, the electronic valve is opened once, and then the tail gas in the gas storage tank can be conveyed into the small desulfurizing tower through the gas conveying pipe once, so that the efficiency and the effect of purifying the tail gas of the diesel engine can be improved.

Preferably, in the step S1, the method further includes the following steps:

s11, the edge part of the mesh bag is sleeved on the outer surface of the air inlet pipe and covers the surface of the baffle ring, then the mesh bag can be fixed through the jogging of the clamping ring and the baffle ring, and then the honeycomb molecular sieve is placed into the mesh bag, so that the honeycomb molecular sieve can be jogged with the air inlet pipe, a certain limiting effect can be achieved on active carbon particles in the mesh bag, and harmful gases such as sulfide in tail gas can be adsorbed and filtered;

s12, a filter screen cylinder is plugged into the first purifying box through a notch, a shunt pipe is connected with an exhaust pipe at the output end of the diesel engine through an oxidation catalyst, and then tail gas is purified through the oxidation catalyst after peculiar smell is adsorbed by activated carbon particles in a mesh bag, so that carbon monoxide and hydrocarbon in the tail gas can be purified;

in the step S2, the method further includes the following steps:

s21, enabling the tail gas after layer-by-layer adsorption and filtration to enter the gas storage box, starting a servo motor in the first storage box, so that the porous net cover can be driven to rotate, and enabling the tail gas to be fully contacted with the gas detection device through rotation of the porous net cover;

in the step S3, the method further includes the following steps:

s31, after the tail gas is pumped into the purifying box II, part of harmful gas remained in the tail gas is filtered through the filter screen plate, and then a rotating motor in the storing box II is started, so that the porous fiber board can be driven to rotate under the action of the connecting rod, and the contact area between the tail gas and the catalyst on the surface of the porous fiber board can be increased to a certain extent;

and S32, finally, opening an electronic valve III after filtering through a particulate filter, so that the tail gas after secondary purification can enter the small desulfurizing tower through a gas pipe III.

Compared with the prior art, the utility model has the beneficial effects that:

1. before the tail gas collaborative purification device is used, the active carbon particles are firstly placed in the mesh bag, the mesh bag is plugged into the air inlet pipe, then the edge of the mesh bag is sleeved on the surface of the air inlet pipe, the mesh bag is limited and fixed through the embedding of the clamping ring and the baffle ring, then the exhaust pipe at the output end of the diesel engine is connected with the shunt pipe through the oxidation catalyst, in the subsequent tail gas purification process, the tail gas can be filtered for the first time through the oxidation catalyst, and the probability of blocking the filtering device in the subsequent purification process is reduced.

2. According to the utility model, the object placing table, the air storage box, the first object storage box, the servo motor, the porous net cover, the fan box and the second air conveying pipe are arranged, tail gas enters the air storage box after primary filtration is completed in the first purifying box, then the servo motor is started, so that the porous net cover is driven to rotate, then the gas detection device is used for detecting whether the tail gas in the air storage box contains other harmful gases except sulfide, when the tail gas contains other harmful gases, the exhaust fan is started, and the tail gas is conveyed into the second purifying box through the second air conveying pipe, so that the tail gas purifying efficiency can be improved to a certain extent.

3. According to the utility model, the second purifying box, the filter screen plate, the rotating motor, the porous fiber plate, the particulate filter and the gas pipe III are arranged, the tail gas entering the second purifying box is filtered through the filter screen plate, then the rotating motor in the storage box II is started, so that the porous fiber plate is driven to rotate, the contact area between the tail gas and the surface catalyst of the porous fiber plate can be increased, finally the particulate matters in the tail gas are purified and intercepted through the particulate filter, and the tail gas after secondary purification enters the small desulfurizing tower through the gas pipe III for desulfurizing treatment.

4. According to the utility model, the notch, the baffle plate, the filter screen cylinder and the silica gel blocking pad are arranged, when the purifying device needs to be cleaned, the baffle plate is pulled outwards, so that the silica gel blocking pad can be pulled out from the notch, and then the filter screen cylinder can be pulled out from the purifying box, thereby providing certain convenience for cleaning the filter screen cylinder by workers.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of an assembly structure of the object placing table of the present utility model;

FIG. 3 is a schematic plan assembly view of a first purifying tank of the present utility model;

FIG. 4 is a schematic view of an assembled structure of the mesh bag of the present utility model;

FIG. 5 is a schematic plan view of an oxidation catalyst according to the present utility model;

FIG. 6 is a schematic plan view of an assembled gas tank according to the present utility model;

FIG. 7 is a schematic plan assembly view of a second purifying tank of the present utility model;

FIG. 8 is a schematic view of an assembled structure of a baffle plate according to the present utility model;

fig. 9 is a flowchart of the operation of the present utility model.

In the figure: 1. a base; 2. a first purifying box; 3. a connection port; 4. a shunt; 5. an oxidation catalyst; 6. an air inlet pipe; 7. a baffle ring; 8. a mesh bag; 9. activated carbon particles; 10. a honeycomb molecular sieve; 11. a clasp; 12. a storage table; 13. a gas storage tank; 14. a storage box I; 15. a servo motor; 16. a porous mesh enclosure; 17. a connecting pipe; 18. a first gas pipe; 19. a fan box; 20. a second gas pipe; 21. a small desulfurizing tower; 22. a second purifying box; 23. a filter screen plate; 24. a second storage box; 25. a rotating motor; 26. a connecting rod; 27. a porous fiberboard; 28. a particulate filter; 29. a third gas pipe; 30. a notch; 31. a baffle; 32. a filter screen cylinder; 33. a silica gel baffle pad; 34. a shower pipe; 35. a particle catcher; 36. and (5) a filter plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 4, 5 and 9, an embodiment of the present utility model is provided: the utility model provides a marine diesel engine is with tail gas cooperative purification device, including base 1 and snap ring 11, purifying box 12 is installed at the top of base 1, and purifying box 2 is "L" font, one side outer wall of purifying box 2 runs through and is provided with connector 3 that arranges around, connector 3's inside sealing connection has shunt tubes 4, oxidation catalyst 5 is installed to one end of shunt tubes 4, intake pipe 6 is installed to one side outer wall of oxidation catalyst 5, baffle ring 7 is installed to the surface of intake pipe 6, the pocket 8 has been cup jointed to the surface of intake pipe 6, evenly arranged active carbon particle 9 has been placed to the inside of pocket 8, honeycomb molecular sieve 10 has been placed to the inside of pocket 8, and honeycomb molecular sieve 10 is located one side of active carbon particle 9, baffle ring 11 has been cup jointed to the surface of baffle ring 7, honeycomb molecular sieve 10 is gomphosis mutually with intake pipe 6, the interior surface mounting of pocket 8 has the conveyer pipe, and the conveyer pipe is located one side of honeycomb molecular sieve 10, the snap ring 11 divide into two sets of upper and lower, the cross-section of snap ring 11 is "concave" structure, fix the edge of pocket 8 at the surface of baffle ring 7 through the snap ring 11.

Further, before using the purification device, firstly, the activated carbon particles 9 are poured into the mesh bag 8, the mesh bag 8 is plugged into the air inlet pipe 6, then the edge of the mesh bag 8 is sleeved on the outer surface of the air inlet pipe 6, then the mesh bag 8 is fixed on the air inlet pipe 6 through the jogging of the clamping ring 11 and the baffle ring 7, then the honeycomb molecular sieve 10 is plugged into the mesh bag 8, and is jogged with the air inlet pipe 6, then the oxidation catalyst 5 can be connected with the exhaust pipe of the diesel engine, in the subsequent use process, the tail gas firstly enters the mesh bag 8 after being filtered by the honeycomb molecular sieve 10, and is purified by the oxidation catalyst 5 after absorbing peculiar smell by the activated carbon particles 9, so that carbon monoxide and hydrocarbon in the tail gas can be converted into water and carbon dioxide through oxidation reaction, and then the tail gas after primary filtration and purification can enter the inside the purification box 1 through the pipe 4, and further the efficiency of tail gas purification can be improved to a certain extent.

Referring to fig. 1, 2, 6 and 7, an embodiment of the present utility model is provided: the utility model provides a marine diesel engine is with tail gas collaborative purification device, including putting thing platform 12, small-size desulfurizing tower 21 and gas-supply pipe three 29, the thing platform 12 is installed to one side outer wall of purifying box one 2, and put thing platform 12 and be located the side top of shunt tubes 4, the gas receiver 13 has been placed to the top of putting thing platform 12, the connecting pipe 17 is installed to one side outer wall of gas receiver 13, gas-supply pipe one 18 is installed to the internal surface of connecting pipe 17, the top of gas receiver 13 runs through and is provided with the ventilation hole, fan box 19 is installed at the top of gas receiver 13, and fan box 19 is located the outside of ventilation hole, the internally mounted of fan box 19 has the air exhauster, the gas-supply pipe two 20 are installed at the top of fan box 19, storage box one 14 is installed to the diapire of gas receiver 13, servo motor 15 is installed to the diapire of storage box one 14, porous screen 16 is installed at the top of servo motor 15 runs through storage box one 14, the inside of the porous net cover 16 is provided with a gas detection device, the outer surfaces of the first gas pipe 18 and the second gas pipe 20 are respectively provided with a first electronic valve and a second electronic valve, the first electronic valve and the second electronic valve are electrically connected with the gas detection device, the gas storage tank 13 is connected with the outer wall of one side of the first purifying tank 2 through a flange, the top of the base 1 is provided with a small desulfurizing tower 21, the small desulfurizing tower 21 is positioned at the rear of the first purifying tank 2, one ends of the first gas pipe 18 and the third gas pipe 29 are connected with the outer surface of the small desulfurizing tower 21, the first gas pipe 18 is positioned at the rear of the third gas pipe 29, the top of the small desulfurizing tower 21 is provided with a smoke exhaust pipe, the top of the first purifying tank 2 is provided with a second purifying tank 22, the back of the second purifying tank 22 is provided with the third gas pipe 29, the inner wall of one side of the second purifying tank 22 is provided with a filter screen 23, the inner wall of the other side of the second purifying tank 22 is provided with a second storing tank 24, the rotating motor 25 is installed to the inner wall of one side of storing box two 24, connecting rod 26 is installed to the output of rotating motor 25, porous fibreboard 27 is installed to the surface mounting of connecting rod 26, the surface spraying of porous fibreboard 27 has the catalyst, particle filter 28 is installed to the inner wall of purifying box two 22, and particle filter 28 is located the top of porous fibreboard 27, the one end of gas-supply pipe two 20 is connected with one side outer wall of purifying box two 22, the bottom of filter screen plate 23 is connected with the diapire of purifying box two 22, porous fibreboard 27 is located one side of filter screen plate 23.

Further, the tail gas after purifying through purifying box one 2 can enter the inside of gas receiver 13, then start servo motor 15 in storing box one 14, thereby drive porous screen panel 16 and rotate, just can drive the tail gas in the gas receiver 13 and flow, and then can increase the time that tail gas and the interior gaseous detection device of porous screen panel 16 contacted, when gaseous detection device detects still contain carbon monoxide and hydrocarbon in the tail gas in the gas receiver 13, the air exhauster in fan box 19 starts, meanwhile, electronic valve two opens, just can carry the inside of purifying box two 22 with the tail gas in the gas receiver 13 through gas-supply pipe two 20 afterwards, after the tail gas filters through the filter screen 23, start the rotating electrical machine 25 in storing box two 24, thereby drive connecting rod 26 and rotate, just can drive porous fiber board 27 and rotate, thereby increase the area of contact of catalyst and tail gas on the surface of porous fiber board 27, and the particulate matter in the tail gas is filtered through particulate filter 28, finally open electronic valve three, make the tail gas after the secondary purification can enter into small-size desulfurizing tower 21 through pipe three 29 and carry out desulfurization treatment, when gas detection device is opened, can make the inside of a desulfurizing tower can be passed through the inside of a certain desulfurizing tower through the gas-supply pipe two-supply pipe 21, and finally can be improved through the inside of a certain desulfurizing tower 18.

Referring to fig. 3 and 8, an embodiment of the present utility model is provided: the utility model provides a marine diesel engine is with tail gas collaborative purification device, including notch 30 and filter 36, the opposite side outer wall of purifying box one 2 runs through and is provided with notch 30, the inside slidable mounting of notch 30 has filter screen section of thick bamboo 32, the surface mounting of filter screen section of thick bamboo 32 has symmetrical arrangement's silica gel to keep off pad 33, one side outer wall that one set of silica gel kept off pad 33 is laminated with one side inner wall of purifying box one 2, one side outer wall that another set of silica gel kept off pad 33 is laminated with the opposite side inner wall of purifying box one 2, baffle 31 is installed to the one end of filter screen section of thick bamboo 32, and baffle 31 and notch 30 gomphosis, the front slidable mounting of purifying box one 2 has three sets of filter plates 36 that reduce in proper order from left to right aperture, and filter 36 is located one side of filter screen section of thick bamboo 32, spray pipe 34 is installed to the opposite side outer wall of purifying box one 2, and one end of spray pipe 34 is connected with one side inner wall of purifying box one 2, spray pipe 34 is located the top of filter screen section of thick bamboo 32, particle trap 35 is installed to the inner wall of purifying box one 2, and particle trap 35 is located the top of spray pipe 34.

Further, before using, can pack new filter screen section of thick bamboo 32 into the inside of notch 30 as required, then promote baffle 31 for silica gel keeps off pad 33 and can enter into the inside of purifying box one 2 through notch 30, then continue to promote baffle 31 until making baffle 31 can gomphosis mutually with notch 30, after tail gas enters into the inside of purifying box one 2, first enter into filter screen section of thick bamboo 32 after filtering through three sets of filter plates 36 that the aperture size is different, in this process, constantly spray the catalyst through shower 34, thereby improve the essence rate, finally through granule catcher 35 intercept the particulate matter in the tail gas can be through dismantling filter screen section of thick bamboo 32 and filter plate 36, can improve this purifier's life to a certain extent, and can provide convenience for subsequent cleaning work.

Further, the working steps of the tail gas cooperative purification device are as follows:

s1, before the tail gas cooperative purification device is used, firstly selecting a proper filter plate 36 to plug into the first purification box 2 according to the requirement, then placing activated carbon particles 9 into the mesh bag 8, and then plugging the mesh bag 8 into the air inlet pipe 6;

s2, enabling the tail gas after primary filtration to enter the first purifying box 2 through the shunt tube 4, then enabling the tail gas to enter the filter screen barrel 32 after being subjected to layer-by-layer adsorption and filtration through the filter plate 36, spraying a catalyst through the spray tube 34 in the process, further increasing the reaction efficiency between the tail gas and the catalyst, enabling the tail gas to enter the particle catcher 35 after being catalyzed by the filter screen barrel 32 and the catalyst, and enabling the particle catcher 35 to intercept and adsorb particles in the tail gas;

s3, when the gas detection device detects that other harmful gases except sulfide exist in the tail gas, an exhaust fan in the fan box 19 is started, the electronic valve II is opened, and then the tail gas in the gas storage tank 13 can enter the purifying tank II 22 through the gas transmission pipe II 20 for secondary purification;

s4, when the gas detection device detects that the tail gas does not contain other harmful gases except sulfide, the tail gas in the gas storage tank 13 can be conveyed into the small desulfurizing tower 21 through the gas conveying pipe 18 as soon as the electronic valve is opened, and further the efficiency and the effect of purifying the tail gas of the diesel engine can be improved.

In step S1, the method further includes the steps of:

s11, the edge part of the mesh bag 8 is sleeved on the outer surface of the air inlet pipe 6 and covers the surface of the baffle ring 7, then the mesh bag 8 can be fixed through the embedding of the clamping ring 11 and the baffle ring 7, and then the honeycomb molecular sieve 10 is placed in the mesh bag 8, so that the honeycomb molecular sieve 10 can be embedded with the air inlet pipe 6, a certain limiting effect can be achieved on the activated carbon particles 9 in the mesh bag 8, and harmful gases such as sulfide in tail gas can be adsorbed and filtered;

s12, a filter screen cylinder 32 is plugged into the purifying box I2 through a notch 30, the shunt pipe 4 is connected with an exhaust pipe at the output end of the diesel engine through the oxidation catalyst 5, and then the tail gas is purified through the oxidation catalyst 5 after the tail gas is adsorbed by activated carbon particles 9 in a mesh bag 8, so that carbon monoxide and hydrocarbon in the tail gas can be purified;

in step S2, the method further includes the steps of:

s21, enabling the tail gas after layer-by-layer adsorption and filtration to enter the gas storage tank 13, starting a servo motor 15 in a first storage box 14, so that the porous net cover 16 can be driven to rotate, and enabling the tail gas to be fully contacted with the gas detection device through rotation of the porous net cover 16;

in step S3, the method further includes the steps of:

s31, after the tail gas is pumped into the purifying box II 22, part of harmful gas remained in the tail gas is filtered through the filter screen plate 23, and then the rotating motor 25 in the storing box II 24 is started, so that the porous fiber board 27 can be driven to rotate under the action of the connecting rod 26, and the contact area of the tail gas and the catalyst on the surface of the porous fiber board 27 can be increased to a certain extent;

and S32, finally, the electronic valve III is opened after the filtration through the particulate filter 28, so that the tail gas after the secondary purification can enter the small-sized desulfurizing tower 21 through the gas pipe III 29.

Working principle: during ship running, the tail gas firstly enters the air inlet pipe 6 through the exhaust pipe, the activated carbon particles 9 adsorb peculiar smell and then purify carbon monoxide and hydrocarbon in the tail gas through the oxidation catalyst 5, the tail gas after primary filtration enters the first purifying box 2, then enters the filter screen cylinder 32 after layer by layer adsorption and filtration through the filter plate 36, finally the particles in the tail gas are intercepted and adsorbed through the particle catcher 35, the tail gas after primary purification enters the gas storage box 13, meanwhile, the servo motor 15 is started, so that the porous net cover 16 is driven to rotate, and then the tail gas in the gas storage box 13 can be detected through the gas detection device in the porous net cover 16;

when the gas detection device detects that other harmful gases except sulfide in the tail gas exist, the exhaust fan is started, the electronic valve II is opened, then the tail gas can enter the interior of the purifying box II 22 through the gas pipe II 20 to be secondarily purified, a corresponding filtering device is selected according to the types of the harmful gases in the tail gas, then the tail gas can be secondarily purified through the filter screen 23 and the catalyst on the surface of the porous fiber plate 27, particulate matters in the tail gas are adsorbed through the particulate filter 28, after the secondary purification is finished, the electronic valve III is opened, so that the tail gas can enter the interior of the small-sized desulfurizing tower 21 through the gas pipe III 29, otherwise, the electronic valve I is opened, the tail gas in the gas storage box 13 is conveyed into the interior of the small-sized desulfurizing tower 21 through the gas pipe I18, and finally the tail gas is discharged through the smoke exhaust pipe after desulfurization treatment through the small-sized desulfurizing tower 21.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a marine diesel engine is with tail gas purification device in coordination, includes base (1), its characterized in that: the top of the base (1) is provided with a first purifying box (2), the first purifying box (2) is L-shaped, one side outer wall of the first purifying box (2) is provided with a front-back connecting port (3) in a penetrating way, and the inside of the connecting port (3) is connected with a shunt pipe (4) in a sealing way;

an oxidation catalyst (5) is arranged at one end of the shunt tube (4), an air inlet pipe (6) is arranged on the outer wall of one side of the oxidation catalyst (5), a baffle ring (7) is arranged on the outer surface of the air inlet pipe (6), a mesh bag (8) is sleeved on the outer surface of the air inlet pipe (6), uniformly arranged activated carbon particles (9) are arranged in the mesh bag (8), a honeycomb molecular sieve (10) is arranged in the mesh bag (8), and the honeycomb molecular sieve (10) is positioned on one side of the activated carbon particles (9);

a clamping ring (11) is sleeved on the outer surface of the baffle ring (7);

the device comprises a purifying box I (2), a storage table (12) is arranged on the outer wall of one side of the purifying box I (2), the storage table (12) is positioned above the side of a shunt tube (4), a gas storage box (13) is arranged at the top of the storage table (12), the gas storage box (13) is connected with the outer wall of one side of the purifying box I (2) through a flange, a connecting pipe (17) is arranged on the outer wall of one side of the gas storage box (13), a gas transmission pipe I (18) is arranged on the inner surface of the connecting pipe (17), a ventilation hole is formed in the top of the gas storage box (13) in a penetrating manner, a fan box (19) is arranged at the top of the gas storage box (13), an exhaust fan is arranged in the fan box (19), a gas transmission pipe II (20) is arranged at the top of the fan box (19), one end of the gas transmission pipe II (20) is connected with the outer wall of one side of the purifying box II (22), a storage box I (14) is arranged on the bottom wall of the gas storage box I (14), a servo motor (15) is arranged on the bottom wall of the storage box I (14), a servo motor (15) is arranged on the output end of the servo motor (15) penetrates through the top of the storage box I (14), and a porous detection device (16) is arranged in the porous screen;

the top of the first purifying box (2) is provided with a second purifying box (22), the back of the second purifying box (22) is provided with a third air pipe (29), the inner wall of one side of the second purifying box (22) is provided with a filter screen (23), the inner wall of the other side of the second purifying box (22) is provided with a second storing box (24), the inner wall of one side of the second storing box (24) is provided with a rotating motor (25), the output end of the rotating motor (25) is provided with a connecting rod (26), the outer surface of the connecting rod (26) is provided with a porous fiber board (27), the outer surface of the porous fiber board (27) is sprayed with a catalyst, the inner wall of the second purifying box (22) is provided with a particle filter (28), and the particle filter (28) is positioned above the porous fiber board (27);

the small desulfurization tower (21) is installed at the top of base (1), and small desulfurization tower (21) is located the rear of purifying box one (2), and gas-supply pipe one (18) and gas-supply pipe three (29)'s one end all are connected with the surface of small desulfurization tower (21), and gas-supply pipe one (18) are located the rear of gas-supply pipe three (29), and the tobacco pipe of discharging fume is installed on the top of small desulfurization tower (21).

2. The exhaust gas cooperative purification device for a marine diesel engine according to claim 1, wherein: the utility model discloses a purifying box, including purifying box, filter screen tube (32) is installed to the opposite side outer wall of purifying box (2), filter screen tube (32) is installed to the inside slidable mounting of notch (30), silica gel fender pad (33) of symmetrical arrangement is installed to the surface mounting of filter screen tube (32), wherein one side outer wall of a set of silica gel fender pad (33) is laminated mutually with one side inner wall of purifying box (2), one side outer wall of another set of silica gel fender pad (33) is laminated mutually with the opposite side inner wall of purifying box (2), baffle (31) are installed to the one end of filter screen tube (32), and baffle (31) are gomphosis mutually with notch (30).

3. The exhaust gas cooperative purification device for a marine diesel engine according to claim 2, wherein: the honeycomb molecular sieve (10) is embedded with the air inlet pipe (6), a conveying pipe is arranged on the inner surface of the mesh bag (8), the conveying pipe is positioned on one side of the honeycomb molecular sieve (10), the clamping rings (11) are divided into an upper group and a lower group, the section of each clamping ring (11) is of a concave structure, and the edge of the mesh bag (8) is fixed on the outer surface of the baffle ring (7) through the clamping rings (11);

the outer surfaces of the first gas pipe (18) and the second gas pipe (20) are respectively provided with a first electronic valve and a second electronic valve, and the first electronic valve and the second electronic valve are electrically connected with the gas detection device; the bottom of the filter screen plate (23) is connected with the bottom wall of the second purifying box (22), and the porous fiber plate (27) is positioned on one side of the filter screen plate (23).

4. A marine diesel exhaust gas cooperative purification apparatus according to claim 3, wherein: the front of the first purifying box (2) is slidably provided with three groups of filter plates (36) with the diameters decreasing from left to right, and the filter plates (36) are positioned on one side of the filter screen cylinder (32).

5. The exhaust gas cooperative purification device for a marine diesel engine according to claim 4, wherein: the shower (34) is installed to the opposite side outer wall of purifying box one (2), and one end of shower (34) is connected with one side inner wall of purifying box one (2), and shower (34) are located the top of filter screen section of thick bamboo (32), and particle trap (35) are installed to the inner wall of purifying box one (2), and particle trap (35) are located the top of shower (34).

6. The method for using the exhaust gas collaborative purification apparatus for a marine diesel engine according to claim 5, characterized in that the working steps of the exhaust gas collaborative purification apparatus are as follows:

s1, before the tail gas cooperative purification device is used, firstly selecting a proper filter plate (36) to plug into the first purification box (2) according to the requirement, then placing activated carbon particles (9) into a mesh bag (8), and then plugging the mesh bag (8) into an air inlet pipe (6);

s2, enabling the tail gas subjected to primary filtration to enter the first purifying box (2) through a shunt tube (4), then entering the filter screen cylinder (32) after being subjected to layer-by-layer adsorption and filtration through a filter plate (36), spraying a catalyst through a spray pipe (34) in the process, and further increasing the reaction efficiency between the tail gas and the catalyst, so that the tail gas enters the particle catcher (35) after being catalyzed by the filter screen cylinder (32) and the catalyst, and then intercepting and adsorbing particles in the tail gas through the particle catcher (35);

s3, when the gas detection device detects that other harmful gases except sulfide exist in the tail gas, an exhaust fan in the fan box (19) is started, the electronic valve II is opened, and then the tail gas in the gas storage tank (13) enters the purifying tank II (22) through the gas transmission pipe II (20) for secondary purification;

s4, when the gas detection device detects that the tail gas does not contain other harmful gases except sulfide, the electronic valve I is opened, and then the tail gas in the gas storage tank (13) is conveyed into the small desulfurizing tower (21) through the gas conveying pipe I (18), so that the efficiency and the effect of purifying the tail gas of the diesel engine are improved.

7. The method of using a marine diesel exhaust gas collaborative purification apparatus according to claim 6, characterized in that in step S1, further comprising the steps of:

s11, the edge part of the mesh bag (8) is sleeved on the outer surface of the air inlet pipe (6) and covers the surface of the baffle ring (7), then the mesh bag (8) is fixed through the embedding of the clamping ring (11) and the baffle ring (7), and then the honeycomb molecular sieve (10) is placed into the mesh bag (8), so that the honeycomb molecular sieve (10) is embedded with the air inlet pipe (6), a certain limiting effect can be achieved on the activated carbon particles (9) in the mesh bag (8), and sulfide harmful gas in tail gas can be adsorbed and filtered;

s12, a filter screen cylinder (32) is plugged into the purifying box I (2) through a notch (30), a shunt pipe (4) is connected with an exhaust pipe at the output end of the diesel engine through an oxidation catalyst (5), and tail gas is purified through the oxidation catalyst (5) after peculiar smell is adsorbed by activated carbon particles (9) in a mesh bag (8), so that carbon monoxide and hydrocarbon in the tail gas are purified;

in step S2, the method further includes the steps of:

s21, enabling the tail gas after layer-by-layer adsorption and filtration to enter the gas storage box (13), starting a servo motor (15) in the first storage box (14) at the same time, driving the porous net cover (16) to rotate, and enabling the tail gas to fully contact with the gas detection device through rotation of the porous net cover (16);

in step S3, the method further includes the steps of:

s31, after the tail gas is pumped into the second purifying box (22), part of harmful gas remained in the tail gas is filtered through the filter screen plate (23), and then the rotating motor (25) in the second storing box (24) is started, so that the porous fiber plate (27) is driven to rotate under the action of the connecting rod (26), and the contact area of the tail gas and the catalyst on the surface of the porous fiber plate (27) is increased to a certain extent;

and S32, finally, the electronic valve III is opened after the filtration of the particle filter (28), so that the tail gas after the secondary purification enters the interior of the small desulfurizing tower (21) through the gas pipe III (29).