Flue gas washing device of oil tanker

Abstract

The utility model relates to the field of marine equipment, in particular to a flue gas washing device of an oil tanker, which comprises a washing box, a flue gas inlet pipe and a flue gas exhaust pipe, the inner top end of the washing box is provided with a shunting shell in sealed rotation with the flue gas inlet pipe, a plurality of flue gas distribution pipes are arrayed on the circumference of the lower end face of the shunting shell, and the flue gas exhaust pipe comprises a drying section coaxially arranged with the flue gas inlet pipe. An impeller connected with a plurality of smoke distribution pipes is arranged on the inner side of the bottom of the drying section, and the impeller is pushed to drive the smoke distribution pipes to rotate through a connecting frame under the flowing action of smoke discharged by the smoke, so that the smoke is automatically and evenly distributed in washing liquid, the washing effect of the smoke is improved, and in the process that the smoke flows through the drying section, on one hand, on one hand, on the other hand, on the other hand; on the one hand, the washed flue gas is used for cooling the unwashed high-temperature flue gas to reduce the cooling burden of the washing liquid, and on the other hand, the washed flue gas is used for heat recovery of the unwashed high-temperature flue gas to realize automatic drying of the flue gas, the workload of the electric drying equipment is reduced, and more energy is saved.

Description

Technical Field

[0001] This utility model relates to a flue gas scrubbing device for oil tankers, and more particularly to a flue gas scrubbing device for oil tankers applied in the field of marine equipment. Background Technology

[0002] During the loading and unloading of crude oil tankers, a large amount of oil vapor remains in the tanks. If the tanks are filled with a large amount of air, the static electricity generated by friction between the oil and the tank can easily ignite the volatile oil vapors, causing an explosion. To ensure the safety of the tanks, flue gas from the ship's boilers is usually introduced into them. Because the flue gas contains relatively little oxygen, it helps prevent explosions. However, the flue gas emitted from the boilers contains a large amount of dust and other pollutants, which would cause pollution if directly introduced into the tanks. Furthermore, the high temperature of the flue gas could damage the equipment in the tanks. Therefore, the flue gas must be cooled and scrubbed before being introduced into the tanks.

[0003] For example, the specification of patent publication number CN106582217B discloses a flue gas scrubbing device and system suitable for crude oil tankers, including a scrubbing tank, a water inlet pipe, an air inlet pipe, a diversion pipe, and a spray pipe. The scrubbing tank is equipped with a gas filtration device and a gas drying device. The water inlet pipe is located between the gas filtration device and the gas drying device. The air inlet pipe is located in the scrubbing tank. The spray pipe includes a first spray pipe and a second spray pipe. By injecting water into the inlet end of the water inlet pipe and flue gas into the inlet end of the air inlet pipe, the flue gas is fully mixed with the water sprayed from the nozzles on the second spray pipe at the inlet end of the air inlet pipe to perform the first scrubbing and cooling of the flue gas. After the flue gas is discharged into the scrubbing tank from the outlet end of the air inlet pipe, it is filtered by the gas filtration device to remove dust from the flue gas. At the same time, the water mist in the scrubbing tank performs a second scrubbing and cooling of the flue gas, which effectively reduces the dust in the flue gas and lowers the temperature of the flue gas. Finally, the flue gas is dried by the gas drying device.

[0004] Based on the above search and combined with existing technology, it was found that existing flue gas scrubbing devices for oil tankers are difficult to achieve uniform distribution of flue gas inside the scrubbing device, resulting in poor scrubbing effect. In order to improve this problem, electric drive equipment such as motors are generally added to cooperate with the intervention of the distributed structure or to increase the flue gas discharge path to make the flue gas uniformly distributed. However, the above methods have the drawbacks of high energy consumption or complex structure. Therefore, a flue gas scrubbing device for oil tankers is proposed to improve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model in view of the above-mentioned prior art is that the flue gas scrubbing device of the oil tanker in the prior art is difficult to achieve uniform distribution of flue gas inside the scrubbing device, resulting in poor scrubbing effect.

[0006] To solve the above problems, this utility model provides a flue gas scrubbing device for oil tankers, including a scrubbing tank, an inlet pipe vertically penetrating the upper center of the scrubbing tank, a diversion shell rotatably installed on the inner top of the scrubbing tank, and the bottom end of the inlet pipe connected to the diversion shell and rotatably sealed with the diversion shell.

[0007] The lower end face of the diversion shell is provided with a circumferential array of multiple smoke distribution pipes, all of which are vertically fixed and connected to the diversion shell, and the bottom end of the smoke distribution pipes extends to the inner bottom end of the washing tank.

[0008] A smoke exhaust pipe is fixedly inserted through the side end of the smoke inlet pipe. The smoke exhaust pipe includes a drying section arranged coaxially with the smoke inlet pipe, and an impeller is provided on the bottom inner side of the drying section. The impeller is connected to multiple smoke distribution pipes through a connecting frame.

[0009] In the aforementioned flue gas scrubbing device for oil tankers, the flow of the flue gas itself drives the impeller to rotate through the connecting frame, which in turn rotates multiple flue gas distribution pipes. This allows the flue gas to be automatically and evenly distributed in the scrubbing liquid, improving the scrubbing effect. Furthermore, as the flue gas flows through the drying section, on the one hand, the scrubbed flue gas cools down the unscrubbed high-temperature flue gas, reducing the cooling burden on the scrubbing liquid. On the other hand, the scrubbed flue gas recovers heat from the unscrubbed high-temperature flue gas, achieving automatic drying of the flue gas, reducing the operational burden on the electric drying equipment, and making it more energy-efficient.

[0010] As a further improvement of this application, the drying section is a heat-conducting pipe, and multiple first heat-conducting plates are integrally and equidistantly fixed on the outer wall of the drying section, and a cleaning component is connected between the outer wall of the drying section and the connecting frame.

[0011] As a further improvement of this application, the connecting frame includes a reciprocating screw and multiple connecting rods. The reciprocating screw is coaxially arranged with the drying section, the upper end of the reciprocating screw is fixed to the impeller, and the multiple connecting rods are respectively fixed between the multiple smoke distribution pipes and the bottom end of the reciprocating screw.

[0012] The cleaning assembly includes a lifting block, a connecting rod, and a brush ring. The lifting block is equipped with a reciprocating bushing adapted to the reciprocating screw. The brush ring is vertically slidably sleeved on the outside of the drying section. The connecting rod is fixed between the lifting block and the brush ring. As the impeller rotates with the reciprocating screw, it drives the lifting block to move up and down along the outer wall of the drying section through the connecting rod, wiping away the impurities that are not washed by the flue gas and adhere to the first heat-conducting plate and the outer wall of the drying section, thereby ensuring the stable heat conduction of the first heat-conducting plate and the drying section.

[0013] As a further improvement of this application, multiple second heat-conducting plates are integrally and equidistantly arranged on the inner wall of the drying section. The second heat-conducting plates can increase the contact area between the second heat-conducting plates and the washed flue gas, thereby improving the drying efficiency.

[0014] As a further improvement of this application, the flue pipe also includes a water interception section, which is fixedly connected to the top of the drying section. The water interception section is fixedly inserted through the flue pipe and is inclined downwards on the side facing the drying section. Some of the water vapor carried in the flue gas condenses in the water interception section and falls back into the washing tank, thereby reducing the loss of washing liquid in the washing tank.

[0015] As a further improvement of this application, it also includes a water storage tank, a water pipe connected between the water storage tank and the washing tank, and a cooling section in the exhaust pipe. One end of the cooling section is fixedly connected to the end of the water interception section away from the drying section, and the other end of the cooling section passes through the water storage tank and extends to the outside of the water storage tank. The flue gas is immersed in the cooling water in the water storage tank along with the cooling section, which can play a final cooling role.

[0016] As a further improvement of this application, the portion of the cooling section located inside the water tank is a serpentine tube, and the serpentine tube portion of the cooling section located inside the water tank is a heat-conducting tube. The serpentine tube-shaped cooling section can make the flue gas cool more fully.

[0017] In summary, through the coordinated arrangement of the impeller, connecting frame, and smoke distribution pipes, the flow of the exhaust gas itself drives the impeller to rotate through the connecting frame and multiple smoke distribution pipes, thereby automatically and evenly distributing the exhaust gas into the washing liquid and improving the washing effect. Furthermore, the partially interlocked design of the exhaust pipe and the inlet pipe allows the washed exhaust gas to be heated in the drying section before being discharged through the exhaust pipe. This heats the drying section, drying the gas flowing through it. On one hand, the washed exhaust gas cools the unwashed high-temperature exhaust gas, reducing the cooling burden on the washing liquid. On the other hand, the washed exhaust gas recovers heat from the unwashed high-temperature exhaust gas, achieving automatic drying of the exhaust gas, reducing the operational burden on the power drying equipment, and increasing energy efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the first embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the first embodiment of this application;

[0020] Figure 3 This is a three-dimensional structural diagram of the exhaust pipe, connecting frame, smoke distribution pipe and cleaning assembly in the first embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the drying section in the first embodiment of this application.

[0022] Explanation of the labels in the diagram:

[0023] 1 Washing tank, 2 Smoke inlet pipe, 3 Smoke outlet pipe, 31 Drying section, 32 Water interception section, 33 Cooling section, 4 Diverter shell, 5 Smoke distribution pipe, 6 Impeller, 7 Connecting frame, 71 Reciprocating screw, 72 Connecting rod, 8 First heat conduction plate, 9 Second heat conduction plate, 10 Cleaning assembly, 101 Lifting block, 102 Connecting rod, 103 Brush ring, 11 Water storage tank. Detailed Implementation

[0024] The following describes one embodiment of this application in detail with reference to the accompanying drawings.

[0025] Implementation method 1:

[0026] Figure 1-4 The present invention discloses a flue gas scrubbing device for an oil tanker, including a scrubbing tank 1. A flue gas inlet pipe 2 is vertically inserted through the center of the upper end of the scrubbing tank 1. A diversion shell 4 is rotatably installed on the inner top of the scrubbing tank 1. The bottom end of the flue gas inlet pipe 2 is connected to the diversion shell 4 and is rotatably and sealed to the diversion shell 4. For example, a conventional sealed bearing is used to connect the flue gas inlet pipe 2 and the diversion shell 4, which can ensure stable relative rotation between the flue gas inlet pipe 2 and the diversion shell 4, and also ensure that the internal flue gas does not overflow.

[0027] The lower end face of the diversion shell 4 is provided with a circumferential array of multiple smoke distribution pipes 5. The multiple smoke distribution pipes 5 are vertically fixed and connected to the diversion shell 4. The bottom end of the smoke distribution pipes 5 extends to the inner bottom end of the washing tank 1. The flue gas is directly and evenly distributed to the inner bottom end of the washing tank 1 by the multiple smoke distribution pipes 5.

[0028] The side end of the inlet pipe 2 is fixedly connected to the exhaust pipe 3. The exhaust pipe 3 includes a drying section 31 arranged coaxially with the inlet pipe 2, and an impeller 6 is provided on the bottom inner side of the drying section 31. The impeller 6 is connected to multiple smoke distribution pipes 5 through a connecting frame 7.

[0029] Based on the above structural configuration, the boiler's exhaust end is connected to the exhaust pipe 3 using a conventional flue gas emission pipe. The flue gas generated by the boiler on the crude oil tanker is guided to the distribution pipe 5 and discharged into the bottom of the washing tank 1. After being washed by the washing liquid inside the washing tank 1, the flue gas is discharged from the exhaust pipe 3. The flow of flue gas in the exhaust pipe 3 drives the impeller 6 to rotate through the connecting frame 7, thereby automatically and evenly distributing the flue gas in the washing liquid and improving the washing effect of the flue gas.

[0030] In addition, before the washed flue gas is discharged outward through the exhaust pipe 3, the high-temperature flue gas in the inlet pipe 2 heats the drying section 31 during its flow through the drying section 31, thereby drying the flue gas flowing inside the drying section 31. On the one hand, the washed flue gas cools down the unwashed high-temperature flue gas, reducing the cooling burden on the washing liquid. On the other hand, the washed flue gas recovers heat from the unwashed high-temperature flue gas, realizing automatic drying of the flue gas, reducing the operating burden on the electric drying equipment, and making it more energy-efficient.

[0031] It should be further noted that, in order to ensure that the flue gas is fully dried, a conventional electric drying device (not shown in the figure) can be added after the drying section 31.

[0032] The drying section 31 is a heat-conducting pipe, and multiple first heat-conducting plates 8 are integrally and equidistantly fixed on the outer wall of the drying section 31. A cleaning component 10 is connected between the outer wall of the drying section 31 and the connecting frame 7. Specifically, the connecting frame 7 includes a reciprocating screw 71 and multiple connecting rods 72. The reciprocating screw 71 is coaxially arranged with the drying section 31. The upper end of the reciprocating screw 71 is fixed to the impeller 6. The multiple connecting rods 72 are respectively fixed between the multiple smoke distribution pipes 5 and the bottom end of the reciprocating screw 71. The cleaning component 10 includes a lifting block 101, a connecting rod 102 and a brush ring 103. A reciprocating bushing adapted to the reciprocating screw 71 is installed on the lifting block 101. The brush ring 103 is vertically slidably sleeved on the outside of the drying section 31. The connecting rod 102 is fixed between the lifting block 101 and the brush ring 103.

[0033] With the above-mentioned structure in place, as the impeller 6 rotates with the reciprocating screw 71, the driving lifting block 101 moves up and down along the outer wall of the drying section 31 via the connecting rod 102 and the brush ring 103, wiping away the impurities that are not washed by the flue gas and are attached to the first heat-conducting plate 8 and the outer wall of the drying section 31, thereby ensuring the stable heat conduction of the first heat-conducting plate 8 and the drying section 31.

[0034] The inner wall of the drying section 31 is integrally and equidistantly provided with multiple second heat-conducting plates 9. The second heat-conducting plates 9 can increase the contact area between the second heat-conducting plates and the washed flue gas, thereby improving the drying efficiency.

[0035] In addition, the exhaust pipe 3 also includes a water interception section 32, which is fixedly connected to the top of the drying section 31. The water interception section 32 is fixedly inserted through the exhaust pipe 2, and the water interception section 32 is inclined downward on the side facing the drying section 31. Some of the water vapor carried in the flue gas condenses in the water interception section 32 and falls back into the washing tank 1, thereby reducing the loss of washing liquid in the washing tank 1.

[0036] In addition, the flue gas scrubbing device of the oil tanker also includes a water tank 11, and a water pipe is connected between the water tank 11 and the scrubbing tank 1. The exhaust pipe 3 also includes a cooling section 33. One end of the cooling section 33 is fixedly connected to the end of the water interception section 32 away from the drying section 31. The other end of the cooling section 33 passes through the water tank 11 and extends to the outside of the water tank 11. The flue gas is immersed in the cooling water in the water tank 11 along with the cooling section 33, which can play a final cooling role.

[0037] To ensure that the flue gas is fully cooled after washing, the part of the cooling section 33 located inside the water storage tank 11 is a serpentine tube, and the serpentine tube part of the cooling section 33 located inside the water storage tank 11 is a heat-conducting tube. The serpentine tube-shaped cooling section 33 can make the flue gas cool more fully.

[0038] It should be further explained that the heat pipes and heat-conducting plates mentioned above are all conventional heat-conducting materials, such as conventional copper pipes and copper plates. In addition, in order to reduce heat transfer in the drying section 31, the water-blocking section 32 and the drying section 31 are connected by conventional heat-insulating pipes, such as glass wool pipes, aluminum silicate pipes, etc.

[0039] Working principle: The staff uses a conventional flue gas emission pipe to connect the boiler's flue gas exhaust end to the flue gas exhaust pipe 3, guiding the flue gas generated by the boiler on the crude oil ship to the flue gas distribution pipe 5 and then discharging it into the bottom of the scrubbing tank 1. After being washed by the scrubbing liquid inside the scrubbing tank 1, the flue gas is discharged from the flue gas exhaust pipe 3. The flow of flue gas in the flue gas exhaust pipe 3 drives the impeller 6 to rotate through the connecting frame 7, thereby making the flue gas automatically and evenly distributed in the scrubbing liquid, improving the scrubbing effect of the flue gas.

[0040] Before the washed flue gas is discharged outward through the exhaust pipe 3, the high-temperature flue gas in the inlet pipe 2 heats the drying section 31 during its flow through the drying section 31, thereby drying the flue gas flowing inside the drying section 31. On the one hand, the washed flue gas cools down the unwashed high-temperature flue gas, reducing the cooling burden on the washing liquid. On the other hand, the washed flue gas recovers heat from the unwashed high-temperature flue gas, achieving automatic drying of the flue gas.

[0041] Furthermore, as the impeller 6 rotates with the reciprocating screw 71, the driving lifting block 101 moves up and down along the outer wall of the drying section 31 via the connecting rod 102, carrying the brush ring 103 to wipe away the impurities attached to the first heat-conducting plate 8 and the outer wall of the drying section 31 by the unwashed flue gas, thus ensuring the stable heat conduction of the first heat-conducting plate 8 and the drying section 31.

[0042] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A flue gas scrubbing device for an oil tanker, comprising a scrubbing tank (1), characterized in that: A smoke inlet pipe (2) is vertically inserted through the center of the upper end of the washing tank (1). A diversion shell (4) is rotatably installed on the inner top of the washing tank (1). The bottom end of the smoke inlet pipe (2) is connected to the diversion shell (4) and is rotatably and sealed to the diversion shell (4). The lower end face of the diversion shell (4) is provided with a plurality of smoke distribution pipes (5) arranged in a circular array. The plurality of smoke distribution pipes (5) are vertically fixed and connected to the diversion shell (4). The bottom end of the smoke distribution pipes (5) extends to the inner bottom end of the washing tank (1). The side end of the inlet pipe (2) is fixedly connected to the exhaust pipe (3). The exhaust pipe (3) includes a drying section (31) arranged coaxially with the inlet pipe (2), and an impeller (6) is provided on the bottom inner side of the drying section (31). The impeller (6) is connected to multiple smoke distribution pipes (5) through a connecting frame (7).

2. The flue gas scrubbing device for an oil tanker according to claim 1, characterized in that: The drying section (31) is a heat-conducting pipe, and multiple first heat-conducting plates (8) are integrally and equidistantly fixed on the outer wall of the drying section (31). A cleaning component (10) is connected between the outer wall of the drying section (31) and the connecting frame (7).

3. The flue gas scrubbing device for an oil tanker according to claim 2, characterized in that: The connecting frame (7) includes a reciprocating screw (71) and a plurality of connecting rods (72). The reciprocating screw (71) is coaxially arranged with the drying section (31). The upper end of the reciprocating screw (71) is fixed to the impeller (6). The plurality of connecting rods (72) are respectively fixed between the plurality of smoke distribution pipes (5) and the bottom end of the reciprocating screw (71). The cleaning assembly (10) includes a lifting block (101), a connecting rod (102), and a brush ring (103). The lifting block (101) is equipped with a reciprocating bushing adapted to the reciprocating screw (71). The brush ring (103) is vertically slidably sleeved on the outside of the drying section (31). The connecting rod (102) is fixed between the lifting block (101) and the brush ring (103).

4. The flue gas scrubbing device for an oil tanker according to claim 2, characterized in that: Multiple second heat-conducting plates (9) are integrally and equidistantly arranged on the inner wall of the drying section (31).

5. The flue gas scrubbing device for an oil tanker according to claim 1, characterized in that: The exhaust pipe (3) also includes a water interception section (32), which is fixedly connected to the top of the drying section (31). The water interception section (32) is fixedly inserted through the exhaust pipe (2), and the water interception section (32) is inclined downward on the side facing the drying section (31).

6. The flue gas scrubbing device for an oil tanker according to claim 5, characterized in that: It also includes a water storage tank (11), and a water pipe is connected between the water storage tank (11) and the washing tank (1). The exhaust pipe (3) also includes a cooling section (33). One end of the cooling section (33) is fixedly connected to the end of the water interception section (32) away from the drying section (31). The other end of the cooling section (33) passes through the water storage tank (11) and extends to the outside of the water storage tank (11).

7. A flue gas scrubbing device for an oil tanker according to claim 6, characterized in that: The portion of the cooling section (33) located inside the water tank (11) is a serpentine tube, and the serpentine tube portion of the cooling section (33) located inside the water tank (11) is a heat-conducting tube.

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