Ship tail gas desulfurization and denitrification integrated device

Abstract

The invention discloses a ship tail gas desulfurization and denitrification integrated device which is applied to the technical field of ship tail gas treatment, and is characterized in that the ship tail gas desulfurization and denitrification integrated device comprises a tail gas treatment tower and a dirty liquid treatment box communicated with the tail gas treatment tower, a gas outlet is formed in the top side of the tail gas treatment tower, and a gas inlet is formed in the outer side of the tail gas treatment tower; a water film spraying device is arranged in the tail gas treatment tower, a denitration spraying mechanism is arranged in the tail gas treatment tower and located above the water film spraying device, a desulfurization spraying assembly is arranged in the tail gas treatment tower and located above the denitration spraying mechanism, a smoke purifier is installed at the position, close to the gas outlet, in the tail gas treatment tower, and treated tail gas is exhausted through the gas outlet. The cleaned sewage enters the sewage treatment tank through the liquid inlet pipe for secondary treatment and then is discharged, so that the tail gas is better desulfurized and denitrated by the tail gas catalytic liquid, and the desulfurization and denitration effect of the tail gas is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship exhaust gas treatment, and in particular to an integrated device for desulfurization and denitrification of ship exhaust gas. Background Art

[0002] Shipping is globally recognized as the main source of air pollutants. In recent years, with the rapid development of international maritime trade, more and more people have begun to care about the impact of air pollutants on the world. Since ship exhaust emissions can easily be transmitted over long distances in the atmosphere, from ocean to land, or even from one continent to another, ship exhaust emissions can have a significant impact on local and regional air quality. In addition, some ship emissions occur in coastal areas, and exhaust pollutants can spread directly to the mainland, causing environmental problems that affect human health and ecosystems. According to statistics from the European Environment Agency, global ships emit about 25 million tons of nitrogen oxides (NOX), about 15 million tons of sulfur oxides (SOX), and about 1.3 million tons of particulate matter (PM) into the atmosphere each year.

[0003] Existing tail gas is simply treated by spraying sewage treatment liquid, the contact time between the sewage treatment liquid and the tail gas is short, and the tail gas treatment liquid does not contact the tail gas sufficiently, resulting in poor tail gas treatment effect. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated device for desulfurization and denitrification of ship exhaust gas, which has the advantages of: further capturing particulate matter and smoke in the exhaust gas, the treated exhaust gas is discharged through the outlet, and the cleaned sewage enters the sewage treatment tank through the liquid inlet pipe for secondary treatment and then discharged.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: an integrated device for desulfurization and denitrification of ship exhaust gas, comprising an exhaust gas treatment tower and a waste liquid treatment tank connected to the exhaust gas treatment tower, an air outlet is provided on the top side of the exhaust gas treatment tower, an air inlet is provided on the outside of the exhaust gas treatment tower, and a water film spray device is provided in the exhaust gas treatment tower, a denitrification spray mechanism is provided above the water film spray device in the exhaust gas treatment tower, a desulfurization spray assembly is provided above the denitrification spray mechanism in the exhaust gas treatment tower, a smoke purifier is installed near the air outlet in the exhaust gas treatment tower, a liquid outlet is provided on the outer surface of the exhaust gas treatment tower, and the waste liquid treatment tank is connected to the liquid outlet through a liquid inlet pipe.

[0006] The present invention is further configured as follows: a steam-water separator is provided above the denitration spray mechanism and the desulfurization spray assembly in the tail gas treatment tower.

[0007] The present invention is further configured as follows: a distributor is provided inside the tail gas treatment tower between the air inlet and the water film spraying device.

[0008] The present invention is further configured as follows: a demister is installed between the steam-water separator and the smoke purifier in the tail gas treatment tower, and a high-pressure sprayer is installed above the demister.

[0009] The present invention is further configured as follows: the smoke purifier is electrically connected to a control module, the control module is used to control the opening and closing of the smoke purifier, the control module is connected to a multi-channel data acquisition module, the multi-channel data acquisition module is electrically connected to a smoke collection module, and the smoke collection module uses a smoke sensor.

[0010] The present invention is further configured as follows: a liquid inlet for pouring sewage treatment liquid is opened on the top side of the sewage liquid treatment tank, a liquid inlet pipe and an air outlet pipe are respectively penetrated and connected on the top side of the sewage liquid treatment tank, the top side of the sewage liquid treatment tank is connected with a stirring shaft that penetrates the sewage liquid treatment tank through a driving member, and a plurality of stirring rods are symmetrically connected to the stirring shaft at equal intervals along the height direction, the driving member includes a servo motor fixedly connected to the top side of the sewage liquid treatment tank, a rotating shaft is coaxially connected to the output end of the servo motor, a first bevel gear is fixedly connected to the end of the rotating shaft, a second bevel gear is meshedly connected to the first bevel gear, and the second bevel gear is connected to the stirring shaft.

[0011] Through the above technical scheme, when it is necessary to treat the exhaust gas of the ship, the exhaust gas is input into the sewage treatment tank through the liquid inlet pipe, and then the sewage treatment liquid is injected through the liquid inlet. At this time, the servo motor is driven to drive the rotating shaft to rotate, the rotating shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the stirring shaft to rotate, and then drives the stirring rod to rotate, and the stirring rod drives the sewage treatment liquid to rotate, so that the sewage treatment liquid and the exhaust gas are fully mixed, and then the sewage treatment liquid can better desulfurize and denitrify the exhaust gas, thereby improving the desulfurization and denitrification effect of the exhaust gas.

[0012] The present invention is further configured such that an activated carbon filter is detachably connected to the air outlet pipe via a connecting assembly.

[0013] The present invention is further configured as follows: the connection assembly comprises a vertical groove provided in the height direction of the inner wall of the air outlet pipe, and a sliding block which slides in the vertical groove is fixedly connected to the activated carbon filter.

[0014] The present invention is further configured as follows: a second magnetic strip is arranged on the bottom wall of the vertical slot, and a first magnetic strip that is magnetically attracted to the second magnetic strip is installed on the bottom side of the slider.

[0015] The present invention is further configured as follows: a fixing rope is provided on the activated carbon filter, one end of the fixing rope away from the activated carbon filter is fixedly connected to a fixing ring, and a limiting rod connected to the fixing ring is provided on the outer side of the air outlet pipe.

[0016] In summary, the present invention has the following beneficial effects: 1. When treating ship exhaust gas, the exhaust gas is input into the exhaust gas treatment tower through the air inlet. The distributor plays a bubbling role on the exhaust gas, which has a desulfurization effect on the exhaust gas. Then the water film spray device sprays clean water on the exhaust gas to reduce dust in the exhaust gas. The denitrification spray mechanism sprays denitrification agent under high temperature conditions to denitrify nitrogen oxides in the exhaust gas. The treated exhaust gas passes through the steam-water separator, which is used to separate water and gas to prevent water from entering the subsequent desulfurization spray component. The desulfurization spray component sprays a sodium hydroxide mixture on the exhaust gas for It absorbs sulfur dioxide in the exhaust gas to form sulfate or sulfuric acid, thereby achieving the effect of desulfurization. The steam-water separator separates the water, and the exhaust gas goes to the high-pressure sprayer and demister. The demister can effectively remove particulate matter and water droplets in the exhaust gas. The high-pressure sprayer sprays high-pressure water on the demister to regularly clean the demister to prevent the particulate matter accumulated on its surface from affecting the operating effect. Finally, the exhaust gas passes through the smoke purifier to capture the particulate matter and smoke in the exhaust gas. The treated exhaust gas is discharged through the outlet, and the cleaned sewage enters the sewage treatment tank through the liquid inlet pipe for secondary treatment and then discharged.

[0017] 2. When it is necessary to treat the exhaust gas of the ship, the exhaust gas is input into the sewage treatment tank through the liquid inlet pipe, and then the sewage treatment liquid is injected through the liquid inlet. At this time, the servo motor is driven to drive the shaft to rotate, the shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the stirring shaft to rotate, and then drives the stirring rod to rotate, the stirring rod drives the sewage treatment liquid to rotate, so that the sewage treatment liquid and the sewage are fully mixed, and then the sewage treatment liquid can better desulfurize and denitrify the sewage, thereby improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of this embodiment; Figure 2 Schematic diagram of the internal structure of the tail gas treatment tower of this embodiment; Figure 3 Schematic diagram of the internal structure of the waste liquid treatment tank of this embodiment; Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0019] Figure numerals: 1. waste liquid treatment box; 2. liquid inlet pipe; 3. liquid inlet; 4. air outlet pipe; 5. servo motor; 6. rotating shaft; 7. first bevel gear; 8. second bevel gear; 9. stirring shaft; 10. stirring rod; 11. vertical groove; 12. slider; 13. first magnetic strip; 14. second magnetic strip; 15. fixing rope; 16. limiting rod; 17. fixing ring; 18. activated carbon filter; 19. exhaust gas treatment tower; 20. air inlet; 21. distributor; 22. smoke purifier; 23. high-pressure sprayer; 24. demister; 25. steam-water separator; 26. desulfurization spray assembly; 27. denitrification spray mechanism; 28. liquid outlet; 29. ​​air outlet; 30. water film spray device. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] Example: Refer to Figure 1-4 As shown, an integrated device for desulfurization and denitration of ship exhaust gas includes an exhaust gas treatment tower 19 and a waste liquid treatment tank 1 connected to the exhaust gas treatment tower 19, an air outlet 29 is opened on the top side of the exhaust gas treatment tower 19, an air inlet 20 is opened on the outside of the exhaust gas treatment tower 19, and a water film spray device 30 is provided in the exhaust gas treatment tower 19, a denitration spray mechanism 27 is provided above the water film spray device 30 in the exhaust gas treatment tower 19, a desulfurization spray assembly 26 is provided above the denitration spray mechanism 27 in the exhaust gas treatment tower 19, and a desulfurization spray assembly 26 is provided near the exhaust gas treatment tower 19 near the air outlet 29 A dust purifier 22 is installed at the tail gas treatment tower 19, a liquid outlet 28 is opened on the outer surface of the tail gas treatment tower 19, and the waste liquid treatment box 1 is connected to the liquid outlet 28 through the liquid inlet pipe 2, and a steam-water separator 25 is arranged above the denitration spray mechanism 27 and the desulfurization spray assembly 26 in the tail gas treatment tower 19, and a uniform distributor 21 is arranged between the air inlet 20 and the water film spray device 30 on the inner side of the tail gas treatment tower 19, and a demister 24 is installed between the steam-water separator 25 and the dust purifier 22 in the tail gas treatment tower 19, and a high-pressure sprayer 23 is installed above the demister 24; Specifically, when treating the exhaust gas of a ship, the exhaust gas is input into the exhaust gas treatment tower 19 through the air inlet 20, the distributor 21 plays a bubbling role on the exhaust gas, and has a desulfurization effect on the exhaust gas, and then the water film spray device 30 sprays clean water on the exhaust gas to reduce dust in the exhaust gas, and the denitrification spray mechanism 27 sprays the denitrification agent under high temperature conditions to denitrify the nitrogen oxides in the exhaust gas. The treated exhaust gas passes through the steam-water separator 25, and the steam-water separator 25 is used to separate water and gas to prevent water from entering the subsequent desulfurization spray component 26. The desulfurization spray component 26 sprays a sodium hydroxide mixture on the exhaust gas for It absorbs sulfur dioxide in the tail gas to form sulfate or sulfuric acid, thereby achieving the effect of desulfurization. The steam-water separator 25 separates the water, and the tail gas goes to the high-pressure sprayer 23 and the demister 24. The demister 24 can effectively remove particulate matter and water droplets in the tail gas. The high-pressure sprayer 23 sprays water at high pressure on the demister 24 to regularly clean the demister 24 to prevent the particulate matter accumulated on its surface from affecting the operating effect. Finally, the tail gas passes through the smoke purifier 22 to capture the particulate matter and smoke in the tail gas. The treated tail gas is discharged through the outlet 29, and the cleaned sewage enters the sewage treatment tank 1 through the liquid inlet pipe 2 for secondary treatment and then discharged.

[0022] Furthermore, the smoke purifier 22 is electrically connected to a control module, which is used to control the opening and closing of the smoke purifier 22. The control module is connected to a multi-channel data acquisition module, which is electrically connected to a smoke collection module, and the smoke collection module uses a smoke sensor.

[0023] Furthermore, a liquid inlet 3 for pouring sewage treatment liquid is provided on the top side of the sewage treatment tank 1, and a liquid inlet pipe 2 and an air outlet pipe 4 are respectively penetrated and connected on the top side of the sewage treatment tank 1. The top side of the sewage treatment tank 1 is connected to a stirring shaft 9 that penetrates the sewage treatment tank 1 through a driving member, and a plurality of stirring rods 10 are fixedly connected to the stirring shaft 9 at equal intervals and symmetrically along the height direction. The driving member includes a servo motor 5 fixedly connected to the top side of the sewage treatment tank 1, and a rotating shaft 6 is coaxially fixedly connected to the output end of the servo motor 5, and a first bevel gear 7 is fixedly connected to the end of the rotating shaft 6, and a second bevel gear 7 is meshingly connected to the first bevel gear 7. 8. The second bevel gear 8 is connected to the stirring shaft 9. When the ship's exhaust gas needs to be treated, the exhaust gas is input into the sewage treatment tank 1 through the liquid inlet pipe 2, and then the sewage treatment liquid is injected through the liquid inlet 3. At this time, the servo motor 5 is driven to drive the rotating shaft 6 to rotate, the rotating shaft 6 drives the first bevel gear 7 to rotate, the first bevel gear 7 drives the second bevel gear 8 to rotate, the second bevel gear 8 drives the stirring shaft 9 to rotate, and then drives the stirring rod 10 to rotate, the stirring rod 10 drives the sewage treatment liquid to rotate, so that the sewage treatment liquid and the sewage are fully mixed, and then the sewage treatment liquid can better desulfurize and denitrify the sewage, thereby improving the sewage treatment effect.

[0024] Furthermore, an activated carbon filter 18 is detachably connected to the exhaust pipe 4 through a connecting component, and the connecting component includes a vertical groove 11 opened in the height direction of the inner wall of the exhaust pipe 4, and a slider 12 that slides in the vertical groove 11 is fixedly connected to the activated carbon filter 18, and a second magnetic strip 14 is welded on the bottom wall of the vertical groove 11, and a first magnetic strip 13 that is magnetically attracted to the second magnetic strip 14 is installed on the bottom side of the slider 12. The activated carbon filter 18 is slid into the vertical groove 11 through the slider 12, and the first magnetic strip 13 and the second magnetic strip 14 are magnetically coupled to each other, so that the activated carbon filter 18 can be conveniently and quickly installed in the exhaust pipe 4, and the activated carbon filter 18 adsorbs impurities and odors in the exhaust gas.

[0025] Furthermore, a fixing rope 15 is provided on the activated carbon filter 18, and one end of the fixing rope 15 away from the activated carbon filter 18 is fixedly connected to a fixing ring 17, and a limiting rod 16 hung with the fixing ring 17 is provided on the outer side of the exhaust pipe 4. When the activated carbon filter 18 needs to be removed, the fixing rope 15 is pulled, and the fixing rope 15 drives the activated carbon filter 18, so that the activated carbon filter 18 can be removed conveniently and quickly, and when installing the activated carbon filter 18, the fixing ring 17 is put on the limiting rod 16 to facilitate the fixed connection of the activated carbon filter 18.

[0026] Operation steps: When treating the exhaust gas of a ship, the exhaust gas is input into the exhaust gas treatment tower 19 through the air inlet 20, the distributor 21 has a bubbling effect on the exhaust gas, and has a desulfurization effect on the exhaust gas, and then the water film spray device 30 sprays clean water on the exhaust gas to reduce dust in the exhaust gas, and the denitrification spray mechanism 27 sprays a denitrification agent under high temperature conditions to denitrify the nitrogen oxides in the exhaust gas. The treated exhaust gas passes through the steam-water separator 25, and the steam-water separator 25 is used to separate water and gas to prevent water from entering the subsequent desulfurization spray component 26. The desulfurization spray component 26 sprays a sodium hydroxide mixture on the exhaust gas to absorb sulfur dioxide in the exhaust gas to form sulfate or sulfuric acid, thereby achieving the desulfurization effect. The steam-water separator 25 separates the moisture, and the exhaust gas goes to the high-pressure sprayer 23 and the demister 24. The demister 24 can effectively remove particulate matter and water droplets in the exhaust gas. The sprayer 23 sprays water at high pressure on the demister 24 to regularly clean the demister 24 to prevent the particulate matter accumulated on its surface from affecting the operating effect. Finally, the exhaust gas passes through the smoke purifier 22 to capture the particulate matter and smoke in the exhaust gas. The treated exhaust gas is discharged through the outlet 29. The cleaned sewage enters the sewage treatment tank 1 through the liquid inlet pipe 2 for secondary treatment and then discharged. The sewage is input into the sewage treatment tank 1 through the liquid inlet pipe 2, and then the sewage treatment liquid is injected through the liquid inlet 3. At this time, the servo motor 5 is driven to drive the rotating shaft 6 to rotate, the rotating shaft 6 drives the first bevel gear 7 to rotate, the first bevel gear 7 drives the second bevel gear 8 to rotate, the second bevel gear 8 drives the stirring shaft 9 to rotate, and then drives the stirring rod 10 to rotate, the stirring rod 10 drives the sewage treatment liquid to rotate, so that the sewage treatment liquid and the exhaust gas are fully mixed, and then the sewage treatment liquid can better desulfurize and denitrify the sewage, thereby improving the sewage treatment effect.

[0027] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An integrated device for desulfurization and denitrification of ship exhaust, characterized in that: The invention comprises a tail gas treatment tower (19) and a waste liquid treatment box (1) connected to the tail gas treatment tower (19), wherein the top side of the tail gas treatment tower (19) is provided with a gas outlet (29), the outer side of the tail gas treatment tower (19) is provided with a gas inlet (20), and the tail gas treatment tower (19) is provided with a water film spray device (30), a denitration spray mechanism (27) is provided above the water film spray device (30) in the tail gas treatment tower (19), a desulfurization spray assembly (26) is provided above the denitration spray mechanism (27) in the tail gas treatment tower (19), a smoke purifier (22) is installed near the gas outlet (29) in the tail gas treatment tower (19), a liquid outlet (28) is provided on the outer surface of the tail gas treatment tower (19), and the waste liquid treatment box (1) is connected to the liquid outlet (28) through a liquid inlet pipe (2).

2. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 1, characterized in that: A steam-water separator (25) is provided above the denitration spray mechanism (27) and the desulfurization spray assembly (26) in the tail gas treatment tower (19).

3. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 1, characterized in that: A distributor (21) is provided inside the tail gas treatment tower (19) between the air inlet (20) and the water film spraying device (30).

4. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 1, characterized in that: A demister (24) is installed between the steam-water separator (25) and the smoke purifier (22) in the tail gas treatment tower (19), and a high-pressure sprayer (23) is installed above the demister (24).

5. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 1, characterized in that: The smoke purifier (22) is electrically connected to a control module, the control module is used to control the opening and closing of the smoke purifier (22), the control module is connected to a multi-channel data acquisition module, the multi-channel data acquisition module is electrically connected to a smoke collection module, and the smoke collection module uses a smoke sensor.

6. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 1, characterized in that: The top side of the sewage treatment tank (1) is provided with a liquid inlet (3) for pouring sewage treatment liquid, and the top side of the sewage treatment tank (1) is respectively penetrated and connected with a liquid inlet pipe (2) and an air outlet pipe (4). The top side of the sewage treatment tank (1) is connected to a stirring shaft (9) penetrating the sewage treatment tank (1) through a driving member, and a plurality of stirring rods (10) are symmetrically connected to the stirring shaft (9) at equal intervals along the height direction. The driving member comprises a servo motor (5) fixedly connected to the top side of the sewage treatment tank (1), and a rotating shaft (6) is coaxially connected to the output end of the servo motor (5), and a first bevel gear (7) is fixedly connected to the end of the rotating shaft (6), and a second bevel gear (8) is meshedly connected to the first bevel gear (7), and the second bevel gear (8) is connected to the stirring shaft (9).

7. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 6, characterized in that: An activated carbon filter screen (18) is detachably connected to the air outlet pipe (4) via a connecting assembly.

8. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 7, characterized in that: The connection assembly comprises a vertical groove (11) formed in the height direction of the inner wall of the air outlet pipe (4), and a sliding block (12) which slides in the vertical groove (11) is fixedly connected to the activated carbon filter (18).

9. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 8, characterized in that: A second magnetic strip (14) is arranged on the inner bottom wall of the vertical slot (11), and a first magnetic strip (13) magnetically attracted to the second magnetic strip (14) is installed on the bottom side of the slider (12).

10. The integrated desulfurization and denitrification device for ship exhaust gas according to claim 7, characterized in that: A fixing rope (15) is provided on the activated carbon filter (18), one end of the fixing rope (15) away from the activated carbon filter (18) is fixedly connected to a fixing ring (17), and a limiting rod (16) connected to the fixing ring (17) is provided on the outer side of the air outlet pipe (4).

Images