CN217950549U

CN217950549U - Marine diesel engine exhaust gas recirculation device based on desulfurizing tower

Info

Publication number: CN217950549U
Application number: CN202220278803.3U
Authority: CN
Inventors: 潘逸杰; 陈宇凡
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2022-02-09
Filing date: 2022-02-09
Publication date: 2022-12-02
Anticipated expiration: 2032-02-09

Abstract

The utility model discloses a marine diesel engine exhaust gas recirculation device based on desulfurizing tower, including the diesel engine body, one side fixedly connected with support of diesel engine body, the upside fixedly connected with digester of support, the bottom side fixed connection flow guide box of digester, one side fixedly connected with connecting pipe of flow guide box, the connecting pipe is linked together with the exhaust gas pipe of diesel engine body, the utility model provides a marine diesel engine exhaust gas recirculation device based on desulfurizing tower, through the setting of aeration pipe, aeration hole, waste gas can expose from the aeration hole under the aeration pipe uniformly, can form fine and close microbubble, and the liquid desulfurizer area of contact in microbubble and the desulfurizing tank is big, can desulfurize better, through the setting of driving motor, stirring leaf for the stirring leaf can stir liquid desulfurizer repeatedly at this in-process, can form the turbulent flow, can promote the liquid desulfurizer and flow for the desulfurizer can exert effect completely, has improved desulfurated efficiency.

Description

Marine diesel engine exhaust gas recirculation device based on desulfurizing tower

Technical Field

The utility model relates to a marine diesel engine exhaust gas recirculation technical field especially relates to a marine diesel engine exhaust gas recirculation device based on desulfurizing tower.

Background

The diesel engine is an engine which burns diesel to obtain energy and release, the working process of the diesel engine has many places same as that of a gasoline engine, each working cycle also undergoes four strokes of air intake, compression, work application and exhaust, and the diesel engine has the advantages of high power and good economic performance and is also widely applied to ships;

in patent application number 202020635932.4's patent document, a marine diesel engine exhaust gas recirculation device based on desulfurizing tower is disclosed, including the diesel engine body, the positive fixed mounting of diesel engine body has the intake pipe, the right side fixed mounting of diesel engine body has vulcanizes the waste gas discharge pipe, vulcanize the right-hand member fixed mounting of waste gas discharge pipe and have horizontal desulfurizing tower, the back fixed mounting of horizontal desulfurizing tower has the purification gas discharge pipe, the lower fixed surface who purifies the gas discharge pipe installs the recirculated gas pipe. According to the ship diesel engine waste gas recirculation device based on the desulfurizing tower, the horizontal desulfurizing tower is arranged, the tank-shaped desulfurizing tower is compact in structure, the problem that the navigation resistance is increased due to a tall chimney when a ship navigates is avoided, a part of purified gas is led out of a diesel engine body again through a recirculating gas pipe to participate in combustion, the proportion of oxygen in a combustion chamber is reduced, and the specific heat capacity of carbon dioxide is higher than that of oxygen, so that the emission of nitrogen oxides is reduced;

in above-mentioned patent literature, it utilizes horizontal desulfurizing tower as desulfurization structure, but this structure still can occupy more hull space, can not effectively improve desulfurization efficiency and effect, for this reason the utility model provides a marine diesel engine exhaust gas recirculation device based on desulfurizing tower is used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a marine diesel engine exhaust gas recirculation device based on desulfurizing tower has solved current marine diesel engine exhaust gas recirculation device based on desulfurizing tower's desulfurization structure still can occupy more hull space, can not effectively improve the problem of desulfurization efficiency and effect.

For solving the technical problem, the utility model provides a pair of marine diesel engine exhaust gas recirculation device based on desulfurizing tower, including the diesel engine body, one side fixedly connected with support of diesel engine body, the upside fixedly connected with digester of support, the bottom side fixed connection water conservancy diversion case of digester, one side fixedly connected with connecting pipe of water conservancy diversion case, the connecting pipe is linked together with the exhaust pipe of diesel engine body, the downside fixedly connected with driving motor of water conservancy diversion case, driving motor's output shaft passes the water conservancy diversion case and extends to in the digester, just rotatory aeration subassembly is installed to the part that driving motor's output shaft is located the digester.

Preferably, rotatory aeration subassembly includes a plurality of aeration pipes, and is a plurality of all end to end of aeration pipe are cyclic annular structure, the diameter of aeration pipe sets gradually from small to big, just a plurality of aeration holes have all been seted up to the downside of aeration pipe.

Preferably, a plurality of the aeration pipes are communicated with the flow guide pipe, a plurality of stirring blades are uniformly distributed on the edge of the upper side of each aeration pipe, and the stirring blades are fixedly connected with the aeration pipes.

Preferably, the output shaft of the driving motor is of a hollow structure and is internally provided with a one-way valve, the outer wall of the output shaft of the driving motor, which is positioned in the diversion box, is provided with a drainage hole, and the output shaft of the driving motor is fixedly connected to the middle position of the diversion pipe.

Preferably, the sliding embedding is equipped with the clamp plate that supports in the digester, support and seted up a plurality of separating tanks on the clamp plate, just support a plurality of springs of fixedly connected with between clamp plate and the digester roof.

Preferably, an adding pipe and an exhaust pipe are fixedly embedded in the outer wall of the upper portion of the desulfurization tank, a flow divider is installed on the exhaust pipe, the other port of the flow divider is communicated with a return pipe, the return pipe is communicated with an air inlet of the diesel engine body, a liquid discharge pipe is fixedly embedded in the outer wall of the lower portion of the desulfurization tank, and the liquid discharge pipe is communicated with a waste liquid collecting box.

Compared with the prior art, the utility model provides a pair of marine diesel engine exhaust gas recirculation device based on desulfurizing tower has following beneficial effect: the utility model provides a marine diesel engine exhaust gas recirculation device based on desulfurizing tower, through the aeration pipe, the setting in aeration hole, waste gas can expose from the aeration hole under the aeration pipe uniformly, can form fine and close microbubble, the liquid desulfurizer area of contact in microbubble and the desulfurizing tank is big, can desulfurize better, through driving motor, the setting of stirring leaf, make the stirring leaf can stir liquid desulfurizer at this in-process repeatedly, can form the sinuous flow, can promote liquid desulfurizer to flow, make the desulfurizer can exert effect completely, the efficiency of desulfurization has been improved, through supporting the clamp plate, the setting of spring, can cushion the desulfurizer, make the desulfurizer can not acutely fluctuate, the desulfurization effect has been ensured, make the traditional desulfurizing tower technique can be applied to marine diesel engine exhaust gas recirculation, the performance of diesel engine body has been improved.

Drawings

Fig. 1 is an external view of a desulfurization tower-based exhaust gas recirculation device for a marine diesel engine of the present invention;

fig. 2 is a side sectional view of a digester in a tower-based marine diesel engine exhaust gas recirculation apparatus of the present invention;

FIG. 3 is a top sectional view of a desulfurizing tank of the desulfurization tower-based exhaust gas recirculation device for marine diesel engines;

fig. 4 is the utility model relates to a structural schematic diagram of the clamp plate that supports among the marine diesel engine exhaust gas recirculation device based on desulfurizing tower.

Reference numbers in the figures: 1. a diesel engine body; 2. a support; 3. a devulcanizer; 301. pressing the plate; 302. a separation tank; 303. a spring; 304. an addition pipe; 305. an exhaust pipe; 306. a flow divider valve; 307. a return pipe; 308. a liquid discharge pipe;

4. a flow guide box; 401. a connecting pipe; 5. a drive motor; 501. a drainage hole; 6. rotating the aeration assembly; 601. an aeration pipe; 602. aeration holes; 603. a flow guide pipe; 604. stirring the leaves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

An embodiment is given by fig. 1-4, the utility model relates to a marine diesel engine exhaust gas recirculation device based on desulfurizing tower, including diesel engine body 1, one side fixedly connected with support 2 of diesel engine body 1, the upside fixedly connected with digester 3 of support 2, the bottom side fixedly connected with flow guide box 4 of digester 3, one side fixedly connected with connecting pipe 401 of flow guide box 4, connecting pipe 401 is linked together with the exhaust pipe of diesel engine body 1, the downside fixedly connected with driving motor 5 of flow guide box 4, driving motor 5's output shaft passes flow guide box 4 and extends to in the digester 3, just rotatory aeration subassembly 6 is installed to the part that driving motor 5's output shaft is located digester 3, and in driving motor 5's output shaft rotation in-process, diesel engine body 1's waste gas can uninterruptedly flow into rotatory aeration subassembly 6 to carry out rotatory aeration, can effectively improve the efficiency and the effect of aeration.

Wherein, rotatory aeration component 6 includes a plurality of aeration pipes 601, and is a plurality of aeration pipe 601 all end to end is cyclic annular structure, aeration pipe 601's diameter is set gradually from little to big, just a plurality of aeration holes 602 have all been seted up to aeration pipe 601's downside, and the area of aeration has greatly been strengthened in the setting of a plurality of aeration pipes 601.

The plurality of aeration pipes 601 are communicated with the guide pipe 603, the plurality of stirring blades 604 are uniformly distributed on the edge of the upper side of each aeration pipe 601, the stirring blades 604 are fixedly connected with the aeration pipes 601, the stirring blades 604 can stir the liquid desulfurizer repeatedly to form turbulent flow, the flow of the liquid desulfurizer can be promoted, the desulfurizer can play a role completely, and after being transmitted through the guide pipe 603, waste gas can be uniformly exposed from the aeration holes 602 below the aeration pipes 601.

The output shaft of the driving motor 5 is of a hollow structure and is internally provided with a one-way valve, the output shaft of the driving motor 5 and part of the outer wall of the output shaft of the diversion box 4 are provided with a drainage hole 501, the output shaft of the driving motor 5 is fixedly connected to the middle position of the diversion pipe 603, the one-way valve can prevent the desulfurizer from flowing backwards, and the output shaft of the driving motor 5 is communicated with the diversion pipe 603 and can be used for conveying waste gas.

Wherein, sliding fit is equipped with in digester 3 and supports clamp plate 301, support and seted up a plurality of separating tanks 302 on the clamp plate 301, just support a plurality of springs 303 of fixedly connected with between clamp plate 301 and the 3 roof of digester, the fluctuation power of desulfurizer can be cushioned to springs 303 for it can play stabilizing effect to support clamp plate 301.

The outer wall of the upper portion of the desulfurization tank 3 is fixedly embedded with an adding pipe 304 and an exhaust pipe 305, the exhaust pipe 305 is provided with a flow dividing valve 306, the other port of the flow dividing valve 306 is communicated with a return pipe 307, the return pipe 307 is communicated with an air inlet of the diesel engine body 1, the outer wall of the lower portion of the desulfurization tank 3 is fixedly embedded with a liquid discharge pipe 308, the liquid discharge pipe 308 is communicated with a waste liquid collecting box, treated waste gas can be discharged from the exhaust pipe 305, after being divided by the flow dividing valve 306, one part of the waste gas is discharged, the other part of the waste gas is mixed with air to be reused as running mixed gas of the diesel engine body 1, and the oxygen ratio of a combustion chamber of the diesel engine body 1 can be adjusted so as to improve the performance of the diesel engine body 1.

The working principle is as follows: in the operation process of the diesel engine body 1, exhaust gas can enter the flow guide box 4 along the exhaust pipe and the connecting pipe 401, and can enter the flow guide pipe 603 from the flow guide hole 501 and the output shaft of the driving motor 5, after being transmitted through the flow guide pipe 603, the exhaust gas can uniformly expose from the aeration hole 602 below the aeration pipe 601, compact micro bubbles can be formed, the contact area between the micro bubbles and a liquid desulfurizer in the desulfurization tank 3 is large, desulfurization can be better achieved, and the driving motor 5 can drive the flow guide pipe 603 to repeatedly rotate, so that the stirring blades 604 can repeatedly stir the liquid desulfurizer in the process, a turbulent flow can be formed, the flow of the liquid desulfurizer can be promoted, the desulfurizer can completely exert effects, the desulfurization efficiency is improved, the pressing plate 301 can float on the surface of the liquid, when a ship bumps, the pressing plate 301 can play a stabilizing role, so that the liquid desulfurizer cannot violently stir, the desulfurization effect is ensured, the traditional desulfurizing tower technology can be applied to exhaust gas recirculation of the ship diesel engine, the treated exhaust gas can be discharged from the exhaust pipe 305, after being shunted by the flow divider valve 306, one part of the exhaust gas can be mixed with air to be used as the diesel engine body 1, and the oxygen mixing ratio of the diesel engine body 1 can be improved.

Claims

1. The utility model provides a marine diesel engine exhaust gas recirculation device based on desulfurizing tower, includes diesel engine body (1), its characterized in that, one side fixedly connected with support (2) of diesel engine body (1), upside fixedly connected with digester (3) of support (2), bottom side fixedly connected with water conservancy diversion case (4) of digester (3), one side fixedly connected with connecting pipe (401) of water conservancy diversion case (4), connecting pipe (401) are linked together with the exhaust pipe of diesel engine body (1), downside fixedly connected with driving motor (5) of water conservancy diversion case (4), the output shaft of driving motor (5) passes in water conservancy diversion case (4) extend to digester (3), just rotatory aeration subassembly (6) are installed to the part that the output shaft of driving motor (5) is located digester (3).

2. The desulfurization tower-based marine diesel engine exhaust gas recirculation apparatus according to claim 1, wherein the rotary aeration assembly (6) comprises a plurality of aeration pipes (601), the aeration pipes (601) are connected end to form an annular structure, the diameters of the aeration pipes (601) are sequentially arranged from small to large, and a plurality of aeration holes (602) are formed in the lower side of each aeration pipe (601).

3. The diesel engine exhaust gas recirculation device for the ship based on the desulfurization tower of claim 2, wherein a plurality of aeration pipes (601) are communicated with each other through a flow guide pipe (603), a plurality of stirring blades (604) are uniformly distributed on the upper side edge of each aeration pipe (601), and the stirring blades (604) are fixedly connected with the aeration pipes (601).

4. The diesel engine exhaust gas recirculation device for the ship based on the desulfurization tower of claim 1, wherein the output shaft of the driving motor (5) is of a hollow structure and is internally provided with a one-way valve, the outer wall of the output shaft of the driving motor (5) and a part of the outer wall of the output shaft positioned in the diversion box (4) is provided with a diversion hole (501), and the output shaft of the driving motor (5) is fixedly connected to the middle position of the diversion pipe (603).

5. The marine diesel engine exhaust gas recirculation device based on the desulfurizing tower is characterized in that a pressing plate (301) is embedded in the desulfurizing tank (3) in a sliding mode, a plurality of separating grooves (302) are formed in the pressing plate (301), and a plurality of springs (303) are fixedly connected between the pressing plate (301) and the top wall of the desulfurizing tank (3).

6. The marine diesel engine exhaust gas recirculation device based on the desulfurizing tower is characterized in that an adding pipe (304) and an exhaust pipe (305) are fixedly embedded in the outer wall of the upper portion of the desulfurizing tank (3), a flow dividing valve (306) is installed on the exhaust pipe (305), the other port of the flow dividing valve (306) is communicated with a return pipe (307), the return pipe (307) is communicated with an air inlet of the diesel engine body (1), a liquid discharge pipe (308) is fixedly embedded in the outer wall of the lower portion of the desulfurizing tank (3), and the liquid discharge pipe (308) is communicated with a waste liquid collecting tank.