Exhaust gas washing desulfurization device and method for marine heavy oil engine based on open seawater method

Abstract

The present invention belongs to the technical field of tail gas treatment, especially an exhaust gas washing desulfurization device and method for marine heavy oil engines based on the open seawater method. Aiming at the problems of the existing technology, such as the fast gas flow and short contact time with seawater, unsatisfactory treatment effect, large space occupied by equipment, low desulfurization efficiency when used in low salinity sea areas, easy blockage of spray holes by sediment, and inconvenient use, the following scheme is proposed. It includes a water storage tank, and a desulfurization tower is fixedly arranged through the top of the water storage tank. An air inlet pipe for air intake is fixedly arranged through one side of the desulfurization tower. In the present invention, by starting the motor, not only can the desulfurization tower be sealed, but also the gas can be detected by the first gas analyzer while sealing, making the detection more accurate. And the seawater in the water storage tank can be detected by the water quality detector, so as to automatically control the addition of alkali, which is convenient for use in low salinity sea areas, improves the treatment effect, and the spray ring will not be blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment, and in particular to an exhaust gas washing and desulfurization device and method for marine heavy oil engines based on the open seawater method. Background Art

[0002] With the approaching of the implementation deadlines of the strict fuel sulfur content standards by countries and international organizations such as IMO, the European Union, and the United States, major marine engine manufacturers and ship emission reduction equipment manufacturers around the world have successively carried out the research and development of exhaust gas washing and desulfurization equipment, aiming to reduce ship fuel costs and operating costs while meeting SOx emission limits.

[0003] The seawater open desulfurization tower (Seawater Scrubber) is a relatively mature desulfurization technology developed in recent decades. Weakly alkaline natural seawater is pumped into the desulfurization tower by a seawater pump and mixed with the exhaust gas generated by the main engine, auxiliary engine, and boiler in the desulfurization tower in the form of spray. The acid-base buffering capacity of seawater and its strong ability to neutralize acidic gases are utilized to effectively remove SO2 in the flue gas, so that the discharged exhaust gas meets the sulfide emission requirements. The washing water containing sulfates is discharged into the sea after being treated up to standard.

[0004] At present, when the seawater desulfurization method is used to treat the gas discharged from fuel combustion, the gas flows relatively fast and the contact time with seawater is short, resulting in unsatisfactory treatment effect, large equipment occupancy space, low desulfurization efficiency when used in low salinity sea areas, easy blockage of spray holes by sediment, and inconvenient use. In addition, only the gas analyzer for detecting tail gas is installed in the treatment tower. If the gas analyzer is damaged or the detection is inaccurate, unqualified tail gas will be discharged. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages in the prior art that the gas flows relatively fast and the contact time with seawater is short, resulting in unsatisfactory treatment effect, large equipment occupancy space, low desulfurization efficiency when used in low salinity sea areas, easy blockage of spray holes by sediment, and inconvenient use, and to provide an exhaust gas washing and desulfurization device and method for marine heavy oil engines based on the open seawater method.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An exhaust gas washing and desulfurization device for marine heavy oil engines based on the open seawater method includes a water storage tank. A desulfurization tower is fixedly arranged through the top of the water storage tank. An air inlet pipe for air intake is fixedly arranged through one side of the desulfurization tower. A spray ring for spraying tail gas is arranged in the desulfurization tower. A first gas analyzer for gas detection is arranged through one side of the desulfurization tower. A demister is arranged in the desulfurization tower;

[0008] One side of the water storage tank is fixedly provided with a filter tank. The bottom inner wall of the filter tank is fixedly provided with a water inlet pipe penetrating through it. The water inlet pipe extends into the seawater. The top of the filter tank is fixedly provided with a water pump. The water inlet end of the water pump is connected with a first pipe and a second pipe through a three-way joint. The inner wall of the filter tank is fixedly provided with a filter plate. One end of the first pipe extends into the filter tank and is located above the filter plate. One end of the second pipe extends into the water storage tank. The water outlet end of the water pump is connected with a spray ring through a third pipe for pumping seawater. Solenoid valves are arranged on both the second pipe and the first pipe to control the use of seawater in the water storage tank. The middle section of the third pipe is wound around an air inlet pipe to cool the tail gas by using the water temperature;

[0009] The top of the water storage tank is fixedly provided with an alkali dissolving tank communicated with the water storage tank. A caustic adding mechanism for adding alkali to the seawater in the water storage tank is arranged on the top of the water storage tank to increase the alkalinity of the seawater and facilitate the use of low salinity seawater;

[0010] A flow blocking mechanism is arranged in the desulfurization tower to block the gas flow, enable the gas to be fully mixed with the seawater, and improve the treatment effect;

[0011] A transmission mechanism is arranged on one side of the water storage tank and is used in cooperation with the flow blocking mechanism and the caustic adding mechanism to provide power for them.

[0012] In a possible design, the flow blocking mechanism includes a first flow dividing plate and a third flow dividing plate fixedly arranged in the desulfurization tower. A connecting column penetrates and slides through the top of the third flow dividing plate. The top of the connecting column is fixedly provided with a second flow dividing plate located below the first flow dividing plate. The outer wall of the connecting column is fixedly sleeved with a fourth flow dividing plate located below the third flow dividing plate. The first gas analyzer is located between the second flow dividing plate and the third flow dividing plate. The connecting column is connected with the transmission mechanism to drive the second flow dividing plate and the fourth flow dividing plate to move up and down. After moving, they are mutually displaced with the first flow dividing plate and the third flow dividing plate to seal the desulfurization tower. The bottom of the connecting column is fixedly provided with a connecting plate. A water quality detector for detecting the seawater in the water storage tank is arranged at the bottom of the connecting plate.

[0013] In a possible design, a connecting cylinder penetrates and slides through one side of the desulfurization tower. The first gas analyzer is located in the connecting cylinder. One end of the connecting cylinder is fixedly provided with a plug plate. Two guide rods penetrate and slide through one side of the plug plate. One end of the guide rods is fixedly connected with the desulfurization tower. A second spring is sleeved on the outer wall of the guide rods. The two ends of the second spring are respectively fixedly connected with the mutually close sides of the plug plate and the desulfurization tower. A second through hole is opened on the outer wall of the connecting cylinder for the first gas analyzer to contact the gas.

[0014] In a possible design, a first gas analyzer is fixedly arranged inside the connecting cylinder. The first gas analyzer is located inside the second gas analyzer. A first through hole located on one side of the first gas analyzer is formed in the outer wall of the connecting cylinder. The plug plate is used in cooperation with the connecting column to automatically push the first gas analyzer to move.

[0015] In a possible design, the spray ring is fixedly arranged at the bottom of the fourth flow dividing plate. The inside of the connecting column is hollow. A plurality of hollow tubes are fixedly arranged through between the connecting column and the spray ring. One end of the third pipeline is communicated and connected with the connecting column. A connecting ring is fixedly sleeved on the outer wall of the spray ring. A rectangular hole is formed in one side of the desulfurization tower. An L-shaped connecting strip is slidably arranged in the rectangular hole. An inclined plate used in cooperation with the plug plate is fixedly arranged at the top of the L-shaped connecting strip.

[0016] In a possible design, an extension plate corresponding to the rectangular hole is fixedly arranged at the bottom of the connecting ring.

[0017] In a possible design, the alkali adding mechanism includes a flow dividing plate rotatably arranged through the top of the water storage tank. Corresponding diversion holes are formed in the bottoms of the flow dividing plate and the alkali dissolving tank. A rotating column is fixedly arranged at the bottom of the flow dividing plate. The rotating column is rotatably arranged on the inner wall of the bottom of the water storage tank. The rotating column is connected with a transmission mechanism to drive the flow dividing plate to rotate.

[0018] In a possible design, the transmission mechanism includes a rotating shaft rotatably arranged through one side of the water storage tank and the filtration tank. A cam in contact with the connecting plate is fixedly sleeved on the outer wall of the rotating shaft. A first spring is sleeved on the outer wall of the connecting column. Two ends of the first spring are respectively fixedly connected to the mutually close sides of the second flow dividing plate and the third flow dividing plate. A motor is fixedly arranged on one side of the filtration tank. The output end of the motor is fixedly connected to the rotating shaft.

[0019] In a possible design, an L-shaped frame is rotatably sleeved on the outer wall of the rotating column. An electromagnetic clutch is fixedly arranged through one side of the L-shaped frame. Meshing bevel gears are fixedly sleeved on the output end of the electromagnetic clutch and the outer wall of the rotating column respectively. The input end of the electromagnetic clutch is fixedly connected to one end of the rotating shaft.

[0020] A desulfurization method for an open seawater method marine heavy oil engine exhaust washing desulfurization device includes the following steps:

[0021] S1. First, the tail gas enters the desulfurization tower through the air inlet pipe. While passing through the air inlet pipe, the water pump is started to pump seawater into the spray ring. While flowing, the seawater cools the tail gas.

[0022] S2. Seawater is then sprayed out from the spray ring to clean and mix the tail gas and desulfurize it. The remaining seawater flows into the water storage tank for collection and the tail gas is tested by the second gas analyzer.

[0023] S3. Simultaneously start the motor to drive the connecting column to move up and down reciprocatingly. While moving upward, the first diverter plate, the second diverter plate, the third diverter plate, and the fourth diverter plate are used to seal and block the flow of gas in the desulfurization tower, and the first gas analyzer is driven to move into the desulfurization tower for detection;

[0024] S4. When the connecting column moves downward, the gas continues to be ejected through the desulfurization tower, and the seawater in the water tank is tested by a water quality detector. When the alkalinity in the seawater is low, the electromagnetic clutch is activated to allow the alkaline solution in the alkali solution tank to flow into the water tank for mixing, and it is used in low-salinity sea areas.

[0025] In this application, the exhaust gas first enters the desulfurization tower through the intake pipe. While passing through the intake pipe, the water pump is started to pump seawater into the spray ring. The seawater is filtered through the filter plate while flowing, and then enters the third pipe through the first pipe and the water pump to cool the exhaust gas.

[0026] The seawater then enters the spray ring through the connecting column and hollow tube and is sprayed out to clean and mix the tail gas and desulfurize it. The remaining seawater flows into the water storage tank for collection and is tested by the second gas analyzer for tail gas.

[0027] At the same time, the motor is started at a fixed time to drive the rotating shaft to rotate. The rotation of the rotating shaft can drive the connecting column to move upward through the cam, and while moving upward, it drives the second diverter plate and the fourth diverter plate to move upward, and conflict with the corresponding first diverter plate and the third diverter plate, so that the holes therebetween are staggered and sealed with each other, and the gas flow in the desulfurization tower is sealed and blocked by the first diverter plate, the fourth diverter plate and the third diverter plate. When the fourth diverter plate moves upward, it drives the connecting ring to move upward, and drives the L-shaped connecting strip and the inclined plate to move upward, which can drive the first gas analyzer to move between the second diverter plate and the third diverter plate to detect the desulfurized gas, and use the second gas analyzer to detect the treated exhaust gas, and intermittently move the first gas analyzer between the second diverter plate and the third diverter plate to perform intermittent closed detection on the desulfurized gas, and compare the two sets of data to prevent the discharge of substandard exhaust gas due to damage to the second gas analyzer;

[0028] When the cam moves away from the connecting column, the connecting column can move downward under the action of the first spring. At this time, the second diverter plate and the fourth diverter plate move away from the first diverter plate and the third diverter plate respectively, and the gas continues to be discharged through the desulfurization tower. At the same time, the seawater in the water storage tank is detected by the water quality detector. When the alkalinity of the seawater is low, the electromagnetic clutch is started, and the alkali solution in the alkali dissolution tank flows into the water storage tank for mixing, and it is used in low-salinity sea areas. Then, the solenoid valve on the first pipeline is closed, and the solenoid valve on the second pipeline is opened, and the seawater after mixing with the alkali solution in the water storage tank is used, so that it can be used in low-salinity sea areas.

[0029] In the present invention, for the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method, through the cooperation of the flow resistance mechanism and the first gas analyzer, the gas after separation can be detected, and part of the gas can be recycled for desulfurization, which not only improves the desulfurization effect, but also can continuously detect, making the detection convenient.

[0030] In the present invention, for the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method, through the alkali addition mechanism, the alkalinity solubility of the seawater in the water storage tank can be improved, so that it can be used in low-salinity sea areas, further improving the desulfurization effect. And through the setting of the second pipeline and the first pipeline, the seawater in the water storage tank and the water in the sea area can be mixed and used, reducing the use of the alkali solution and the treatment cost.

[0031] In the present invention, for the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method, through the cooperation of the transmission mechanism with the alkali addition mechanism and the flow resistance mechanism, the use of additional power sources can be reduced, and the alkali addition mechanism can be selectively opened, making the use control convenient and easy to use.

[0032] In the present invention, by starting the motor regularly (intermittently), not only can the desulfurization tower be sealed, but also the gas can be detected by the first gas analyzer and the second gas analyzer while sealing, making the detection more accurate. And the seawater in the water storage tank can be detected by the water quality detector, so as to automatically control the addition of alkali, which is convenient for use in low-salinity sea areas, improves the treatment effect, and the spray ring will not be blocked. Brief Description of the Drawings

[0033] Figure 1 is a three-dimensional structure schematic diagram of the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method proposed by the present invention;

[0034] Figure 2 is a sectional structure schematic diagram of the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method proposed by the present invention;

[0035] Figure 3 is a schematic diagram of the diverter plate structure of the marine heavy oil engine exhaust washing desulfurization device based on the open seawater method proposed by the present invention;

[0036] Figure 4 For Figure 3 Schematic diagram of the enlarged structure of part A in

[0037] Figure 5 For Figure 3 Schematic diagram of the enlarged structure of part B in

[0038] Figure 6 Schematic diagram of the L-shaped connecting frame structure of the marine heavy oil engine exhaust gas washing desulfurization device based on the open seawater method proposed by the present invention;

[0039] Figure 7 Schematic diagram of the connecting plate structure of the marine heavy oil engine exhaust gas washing desulfurization device based on the open seawater method proposed by the present invention.

[0040] In the figure: 1, water storage tank; 2, desulfurization tower; 3, intake pipe; 4, first gas analyzer; 5, alkali dissolution tank; 6, filter tank; 7, water inlet pipe; 8, water pump; 9, first pipeline; 10, second pipeline; 11, third pipeline; 12, motor; 13, solenoid valve; 14, connecting column; 15, filter plate; 16, shunt plate; 17, rotating column; 18, diversion hole; 19, inclined plate; 20, first through hole; 21, demister; 22, first shunt plate; 23, second shunt plate; 24, third shunt plate; 25, fourth shunt plate; 26, connecting ring; 27, first spring; 28, connecting cylinder; 29, second gas analyzer; 30, second through hole; 31, plug plate; 32, guide rod; 33, second spring; 34, extension plate; 35, rectangular hole; 36, spray ring; 37, hollow pipe; 38, rotating shaft; 39, L-shaped frame; 40, electromagnetic clutch; 41, bevel gear; 42, connecting plate; 43, water quality detector; 44, cam; 45, L-shaped connecting strip. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0042] Embodiment 1

[0043] Refer to Figures 1-7 , a marine heavy oil engine exhaust gas washing desulfurization device based on the open seawater method, which is applied in the field of tail gas treatment, includes: a water storage tank 1, a desulfurization tower 2 is fixedly provided through the top of the water storage tank 1, an intake pipe 3 for intake is fixedly provided through one side of the desulfurization tower 2, a spray ring 36 for spraying tail gas is provided in the desulfurization tower 2, a second gas analyzer 29 for detecting gas is provided through one side of the desulfurization tower 2, and a demister 21 is provided in the desulfurization tower 2;

[0044] One side of the water storage tank 1 is fixedly provided with a filter tank 6. The bottom inner wall of the filter tank 6 is fixedly provided with a water inlet pipe 7 penetrating through it. The water inlet pipe 7 extends into the seawater. The top of the filter tank 6 is fixedly provided with a water pump 8. The water inlet end of the water pump 8 is connected with a first pipeline 9 and a second pipeline 10 through a three-way joint. The inner wall of the filter tank 6 is fixedly provided with a filter plate 15. One end of the first pipeline 9 extends into the filter tank 6 and is located above the filter plate 15. One end of the second pipeline 10 extends into the water storage tank 1. The water outlet end of the water pump 8 is communicated with a spray ring 36 through a third pipeline 11 for pumping seawater. Solenoid valves 13 are provided on both the second pipeline 10 and the first pipeline 9 to control the use of seawater in the water storage tank 1. The middle section of the third pipeline 11 is wound around the air inlet pipe 3 to cool the tail gas by using the water temperature;

[0045] The top of the water storage tank 1 is fixedly provided with an alkali dissolving tank 5 communicated with the water storage tank 1. A caustic adding mechanism for adding alkali to the seawater in the water storage tank 1 is provided on the top of the water storage tank 1 to increase the alkalinity of the seawater and facilitate the use of low salinity seawater;

[0046] A flow blocking mechanism is arranged in the desulfurization tower 2 to block the gas flow, make the gas fully mix with the seawater, and improve the treatment effect;

[0047] A transmission mechanism is arranged on one side of the water storage tank 1 and is used in cooperation with the flow blocking mechanism and the caustic adding mechanism to provide power for them. Through the transmission mechanism, the flow blocking mechanism can be driven to block the gas in the desulfurization tower 2, make the gas fully mix with the seawater, improve the desulfurization effect, and the caustic adding mechanism can be driven to add alkali to the seawater stored in the water storage tank 1 to increase the alkalinity of the seawater, facilitate the use in low salinity sea areas, and make its use convenient.

[0048] The flow blocking mechanism includes a first diverter plate 22 and a third diverter plate 24 fixedly arranged in the desulfurization tower 2, a connecting column 14 is provided on the top of the third diverter plate 24 for sliding therethrough, a second diverter plate 23 located below the first diverter plate 22 is fixed on the top of the connecting column 14, a fourth diverter plate 25 located below the third diverter plate 24 is fixedly sleeved on the outer wall of the connecting column 14, a second gas analyzer 29 is located between the second diverter plate 23 and the third diverter plate 24, the connecting column 14 is connected to the transmission mechanism, and is used to drive the second diverter plate 23 and the fourth diverter plate 25 to move up and down, and after movement, they are offset from each other with the first diverter plate 22 and the third diverter plate 24 to seal the desulfurization tower 2, a connecting plate 42 is fixed on the bottom of the connecting column 14, and a water quality detector 43 for detecting seawater in the water storage tank 1 is provided at the bottom of the connecting column 14 through the transmission mechanism. The mechanical mechanism drives the connecting column 14 to rise and fall, and can drive the second diverter plate 23 and the fourth diverter plate 25 to move upward at the same time, so that they conflict with the first diverter plate 22 and the third diverter plate 24 respectively, and the filter holes are staggered with each other, which can seal the inside of the desulfurization tower 2, making it convenient for the second gas analyzer 29 to detect the treated gas. At the same time, the gas below the fourth diverter plate 25 stays in the desulfurization tower 2, which not only improves the treatment effect, but also improves the detection accuracy of the second gas analyzer 29. The second gas analyzer 29 adopts the first gas analyzer in the patent document CN105275558B, and after resetting, the seawater in the water tank 1 can be detected by the water quality detector 43 to control the alkali adding mechanism to add alkali. The water quality detector 43 adopts the water quality detector in the patent document CN114890575B.

[0049] The spray ring 36 is fixed at the bottom of the fourth diverter plate 25. The interior of the connecting column 14 is hollow. A plurality of hollow tubes 37 are fixedly provided between the connecting column 14 and the spray ring 36. One end of the third pipe 11 is connected to the connecting column 14. The outer wall of the spray ring 36 is fixedly sleeved with a connecting ring 26. A rectangular hole 35 is provided on one side of the desulfurization tower 2. An L-shaped connecting strip 45 is slidably provided in the rectangular hole 35. An inclined plate 19 used in conjunction with the blocking plate 31 is fixed on the top of the L-shaped connecting strip 45. The fourth diverter plate 25 can move upward by driving the L-shaped connecting strip 45 to move upward through the connecting ring 26, and the blocking plate 31 can be driven to move by the inclined plate 19, thereby driving the second gas analyzer 29 to move into the desulfurization tower 2. The setting of the connecting column 14 and the rotating column 17 can save the use of pipelines and support the fourth diverter plate 25 to make it more stable.

[0050] The alkali adding mechanism includes a diversion plate 16 rotatably arranged through the top of the water storage tank 1. Corresponding diversion holes 18 are provided at the bottoms of both the diversion plate 16 and the alkali dissolving tank 5. A rotating column 17 is fixedly arranged at the bottom of the diversion plate 16. The rotating column 17 is rotatably arranged on the inner wall of the bottom of the water storage tank 1. The rotating column 17 is connected to the transmission mechanism, driving the diversion plate 16 to rotate. Through the transmission mechanism, the rotating column 17 can be driven to rotate, thereby driving the diversion plate 16 to rotate. When the diversion holes 18 on the diversion plate 16 correspond to the diversion holes 18 on the alkali dissolving tank 5, the alkali solution in the alkali dissolving tank 5 will flow into the water storage tank 1, adding alkali to the seawater in the water storage tank 1, which is convenient to use.

[0051] The transmission mechanism includes a rotating shaft 38 rotatably arranged through one side of the water storage tank 1 and the filtration tank 6. An outer wall of the rotating shaft 38 is fixedly sleeved with a cam 44 that abuts against a connecting plate 42. A first spring 27 is sleeved on an outer wall of the connecting column 14. Two ends of the first spring 27 are respectively fixedly connected to mutually approaching sides of a second diversion plate 23 and a third diversion plate 24. A motor 12 is fixedly arranged on one side of the filtration tank 6. An output end of the motor 12 is fixedly connected to the rotating shaft 38. By starting the motor 12, the rotating shaft 38 can be driven to rotate, driving the cam 44 to rotate. During the rotation process, the cam 44 will abut against the connecting plate 42 and move it upward. When the convex part of the cam 44 moves away from the connecting plate 42, the connecting column 14 can be reset under the action of the first spring 27, making the connecting plate 42 always abut against the cam 44, facilitating its reciprocating movement.

[0052] Embodiment 2

[0053] Reference Figures 1-7 , on the basis of Embodiment 1, the improvement is as follows:

[0054] A connecting cylinder 28 is slidably arranged through one side of the desulfurization tower 2. A second gas analyzer 29 is located inside the connecting cylinder 28. One end of the connecting cylinder 28 is fixedly provided with a plug plate 31. Two guide rods 32 are slidably arranged through one side of the plug plate 31. One end of the guide rods 32 is fixedly connected to the desulfurization tower 2. A second spring 33 is sleeved on an outer wall of the guide rods 32. Two ends of the second spring 33 are respectively fixedly connected to mutually approaching sides of the plug plate 31 and the desulfurization tower 2. A second through hole 30 is provided on an outer wall of the connecting cylinder 28 for the second gas analyzer 29 to contact the gas and detect the flowing tail gas. A first gas analyzer 4 is fixedly arranged inside the connecting cylinder 28. The first gas analyzer 4 is located inside the second gas analyzer 29. A first through hole 20 is provided on an outer wall of the connecting cylinder 28 on one side of the first gas analyzer 4. The plug plate 31 is used in cooperation with the connecting column 14 to automatically push the first gas analyzer 4 to move. The plug plate 31 can be pushed to move through the connecting column 14, pushing the first gas analyzer 4 into the sealed space inside the desulfurization tower 2 to synchronize with the seal. At the same time of resetting, the first gas analyzer 4 can be reset under the action of the second spring 33, making it convenient to use.

[0055] A extension plate 34 corresponding to the rectangular hole 35 is fixedly provided at the bottom of the connecting ring 26. When the connecting ring 26 moves upward, it can drive the extension plate 34 to move upward, making the extension plate 34 correspond to the rectangular hole 35, which can ensure the sealing performance of the desulfurization tower 2 and prevent the unprocessed gas from leaking out.

[0056] An L-shaped frame 39 is rotatably sleeved on the outer wall of the rotating column 17. One side of the L-shaped frame 39 is fixedly provided with an electromagnetic clutch 40 through it. Meshing bevel gears 41 are fixedly sleeved on the output end of the electromagnetic clutch 40 and the outer wall of the rotating column 17. The input end of the electromagnetic clutch 40 is fixedly connected to one end of the rotating shaft 38. When the rotating shaft 38 rotates, it can drive the input end of the electromagnetic clutch 40 to rotate. When the water quality detector 43 detects that alkali needs to be added, the electromagnetic clutch 40 is started to drive the output end to rotate. The rotating column 17 is driven to rotate through the two bevel gears 41 to control the alkali solution to flow into the water storage tank 1, and the electromagnetic clutch 40 can be supported by the L-shaped frame 39 to make its rotation more stable.

[0057] A desulfurization method for an open seawater method marine heavy oil engine exhaust washing desulfurization device includes the following steps:

[0058] S1. First, the tail gas enters the desulfurization tower 2 through the intake pipe 3. While passing through the intake pipe 3, the water pump 8 is started to pump seawater into the spray ring 36. The seawater cools the tail gas while flowing.

[0059] S2. Then the seawater is sprayed out from the spray ring 36 to wash and mix the tail gas for desulfurization. The remaining seawater flows into the water storage tank 1 for collection, and the tail gas is detected by the second gas analyzer 29.

[0060] S3. At the same time, the motor 12 is started to drive the connecting column 14 to move up and down reciprocally. While moving upward, the gas flow in the desulfurization tower 2 is sealed and blocked through the first flow dividing plate 22, the second flow dividing plate 23, the third flow dividing plate 24 and the fourth flow dividing plate 25, and the second gas analyzer 29 is driven to move into the desulfurization tower 2 for detection.

[0061] S4. When the connecting column 14 moves downward, the gas continues to be discharged through the desulfurization tower 2, and the seawater in the water storage tank 1 is detected by the water quality detector 43. When the alkalinity of the seawater is relatively low, the electromagnetic clutch 40 is started to make the alkali solution in the alkali solution tank 5 flow into the water storage tank 1 for mixing, and it is used in low salinity sea areas.

[0062] However, as is well known to those skilled in the art, the working principles and wiring methods of the first gas analyzer 4, the motor 12, the solenoid valve 13, the second gas analyzer 29, the electromagnetic clutch 40, and the water quality detector 43 are common knowledge, and they all belong to conventional means or well-known common sense. Therefore, they will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

[0063] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. Marine heavy oil engine exhaust gas washing desulfurization device based on open seawater method, including a water storage tank (1), characterized in that, The top of the water storage tank (1) is fixedly provided with a desulfurization tower (2) through it. One side of the desulfurization tower (2) is fixedly provided with an air inlet pipe (3) for air intake. Inside the desulfurization tower (2), there is a spray ring (36) for spraying the tail gas. One side of the desulfurization tower (2) is provided with a second gas analyzer (29) for gas detection. Inside the desulfurization tower (2), there is a demister (21). One side of the water storage tank (1) is fixedly provided with a filter tank (6). The bottom inner wall of the filter tank (6) is fixedly provided with a water inlet pipe (7) passing through it. The water inlet pipe (7) extends to the sea water. The top of the filter tank (6) is fixedly provided with a water pump (8). The water inlet end of the water pump (8) is connected with a first pipe (9) and a second pipe (10) through a three-way joint. The inner wall of the filter tank (6) is fixedly provided with a filter plate (15). One end of the first pipe (9) extends into the filter tank (6) and is located above the filter plate (15). One end of the second pipe (10) extends into the water storage tank (1). The water outlet end of the water pump (8) is communicated with the spray ring (36) through a third pipe (11) for pumping sea water. Solenoid valves (13) are arranged on both the second pipe (10) and the first pipe (9) to control the use of sea water in the water storage tank (1). The middle section of the third pipe (11) is wound around the air inlet pipe (3) to cool the tail gas by using the water temperature. The top of the water storage tank (1) is fixedly provided with an alkali dissolution tank (5) communicated with the water storage tank (1). The top of the water storage tank (1) is provided with an alkali adding mechanism for adding alkali to the sea water in the water storage tank (1) to increase the alkalinity of the sea water and facilitate the use of low salinity sea water. A flow blocking mechanism is arranged inside the desulfurization tower (2) to block the gas flow, enable the gas to be fully mixed with the sea water, and improve the treatment effect. A transmission mechanism is arranged on one side of the water storage tank (1) and is used in cooperation with the flow blocking mechanism and the alkali adding mechanism to provide power for them. The flow blocking mechanism includes a first flow dividing plate (22) and a third flow dividing plate (24) fixedly arranged inside the desulfurization tower (2). A connecting column (14) is slidably arranged through the top of the third flow dividing plate (24). The top of the connecting column (14) is fixedly provided with a second flow dividing plate (23) located below the first flow dividing plate (22). The outer wall of the connecting column (14) is fixedly sleeved with a fourth flow dividing plate (25) located below the third flow dividing plate (24). The second gas analyzer (29) is located between the second flow dividing plate (23) and the third flow dividing plate (24). The connecting column (14) is connected with the transmission mechanism to drive the second flow dividing plate (23) and the fourth flow dividing plate (25) to move up and down, and after moving, they are mutually misaligned with the first flow dividing plate (22) and the third flow dividing plate (24) to seal the inside of the desulfurization tower (2). The bottom of the connecting column (14) is fixedly provided with a connecting plate (42). The bottom of the connecting plate (42) is provided with a water quality detector (43) for detecting the sea water in the water storage tank (1).

2. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 1, characterized in that, On one side of the desulfurization tower (2), a connecting cylinder (28) is slidably arranged through. The second gas analyzer (29) is located inside the connecting cylinder (28). One end of the connecting cylinder (28) is fixedly provided with a plug plate (31). Two guide rods (32) are slidably arranged through one side of the plug plate (31). One end of the guide rod (32) is fixedly connected to the desulfurization tower (2). A second spring (33) is sleeved on the outer wall of the guide rod (32). Two ends of the second spring (33) are respectively fixedly connected to the mutually approaching sides of the plug plate (31) and the desulfurization tower (2). A second through hole (30) is formed in the outer wall of the connecting cylinder (28) for the second gas analyzer (29) to contact the gas.

3. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 2, wherein, A first gas analyzer (4) is fixedly arranged inside the connecting cylinder (28). The first gas analyzer (4) is located inside the second gas analyzer (29). A first through hole (20) is formed in the outer wall of the connecting cylinder (28) on one side of the first gas analyzer (4). The plug plate (31) is used in cooperation with the connecting column (14) to automatically push the first gas analyzer (4) to move.

4. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 3, characterized in that, The spray ring (36) is fixedly arranged at the bottom of the fourth flow dividing plate (25). The inside of the connecting column (14) is hollow. A plurality of hollow tubes (37) are fixedly arranged through between the connecting column (14) and the spray ring (36). One end of the third pipeline (11) is communicated with the connecting column (14). A connecting ring (26) is fixedly sleeved on the outer wall of the spray ring (36). A rectangular hole (35) is formed in one side of the desulfurization tower (2). An L-shaped connecting strip (45) is slidably arranged in the rectangular hole (35). The top of the L-shaped connecting strip (45) is fixedly provided with an inclined plate (19) used in cooperation with the plug plate (31).

5. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 4, wherein The bottom of the connecting ring (26) is fixedly provided with an extension plate (34) corresponding to the rectangular hole (35).

6. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 5, characterized in that The alkali adding mechanism includes a flow dividing disc (16) rotatably arranged through the top of the water storage tank (1). Corresponding diversion holes (18) are formed in the bottoms of the flow dividing disc (16) and the alkali dissolving tank (5). A rotating column (17) is fixedly arranged at the bottom of the flow dividing disc (16). The rotating column (17) is rotatably arranged on the bottom inner wall of the water storage tank (1). The rotating column (17) is connected to the transmission mechanism to drive the flow dividing disc (16) to rotate.

7. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 6, characterized in that, The transmission mechanism includes a rotating shaft (38) rotatably arranged through one side of the water storage tank (1) and the filtration tank (6). A cam (44) in contact with the connecting plate (42) is fixedly sleeved on the outer wall of the rotating shaft (38). A first spring (27) is sleeved on the outer wall of the connecting column (14). Two ends of the first spring (27) are respectively fixedly connected to the mutually approaching sides of the second flow dividing plate (23) and the third flow dividing plate (24). A motor (12) is fixedly arranged on one side of the filtration tank (6). The output end of the motor (12) is fixedly connected to the rotating shaft (38).

8. The exhaust gas scrubbing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 7, characterized in that, An L-shaped frame (39) is rotatably sleeved on the outer wall of the rotating column (17). One side of the L-shaped frame (39) is fixedly provided with an electromagnetic clutch (40) through it. Conical gears (41) that mesh with each other are fixedly sleeved on the output end of the electromagnetic clutch (40) and the outer wall of the rotating column (17). The input end of the electromagnetic clutch (40) is fixedly connected to one end of a rotating shaft (38).

9. The desulfurization method of the exhaust gas washing desulfurization device for marine heavy oil engines based on the open seawater method according to claim 8, characterized in that, It includes the following steps: S1. First, the tail gas enters the desulfurization tower (2) through the intake pipe (3). While passing through the intake pipe (3), the water pump (8) is started to pump seawater into the spray ring (36). While the seawater is flowing, it cools the tail gas. S2. Then, the seawater is sprayed out from the spray ring (36) to wash and mix the tail gas for desulfurization. The remaining seawater flows into the water storage tank (1) for collection, and the tail gas is detected by the second gas analyzer (29). S3. At the same time, the motor (12) is started to drive the connecting column (14) to move up and down reciprocally. While moving upward, the gas flow in the desulfurization tower (2) is sealed off through the first flow dividing plate (22), the second flow dividing plate (23), the third flow dividing plate (24) and the fourth flow dividing plate (25), and the first gas analyzer (4) is driven to move into the desulfurization tower (2) for detection. S4. When the connecting column (14) moves downward, the gas continues to be discharged through the desulfurization tower (2), and the seawater in the water storage tank (1) is detected by the water quality detector (43). When the alkalinity in the seawater is relatively low, the electromagnetic clutch (40) is started to make the alkali solution in the alkali dissolution tank (5) flow into the water storage tank (1) for mixing, for use in low-salinity sea areas.

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