A method based on a rotating disk reaction device for absorbing ship exhaust gas

Abstract

The present invention discloses a method based on a ship exhaust gas absorption rotating disk reaction device, comprising: S1, starting an exhaust gas treatment system; S2, introducing ship exhaust gas and high-viscosity alkaline mixed absorption liquid; S3, online real-time detection of the treated ship exhaust gas; S4, recycling the high-viscosity alkaline mixed absorption liquid; S5, cyclically performing S1 to S4. The present invention treats ship exhaust gas through an exhaust gas treatment system using a ship exhaust gas absorption rotating disk reaction device, giving full play to the treatment effect of the ship exhaust gas absorption rotating disk reaction device and ensuring its treatment efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas treatment, and in particular to a method based on a ship exhaust gas absorption rotating disk reaction device. Background Art

[0002] The main pollutants in ship exhaust are carbon dioxide (CO2), sulfur oxides (SO x ) and nitrogen oxides (NO x ), if the exhaust gas is discharged directly without treatment, it will cause serious harm to the marine environment and the global ecosystem. The rotating bed is particularly suitable for ship exhaust treatment due to its high mass transfer efficiency, small equipment size, short residence time, strong anti-blocking ability, simple operation and convenient maintenance. In order to give full play to the treatment effect of the ship exhaust gas absorption rotating disk reactor and ensure its treatment efficiency, it is necessary to invent a ship exhaust gas treatment method based on the ship exhaust gas absorption rotating disk reactor. Summary of the invention

[0003] The present invention provides a method based on a ship exhaust gas absorption rotating disk reaction device to solve the above technical problems.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A method based on a ship exhaust gas absorption rotating disk reactor, treating exhaust gas through an exhaust gas treatment system using the ship exhaust gas absorption rotating disk reactor, comprising the following steps:

[0006] S1, start the exhaust gas treatment system, the controller controls the power unit to start, and the controller adjusts the speed of the power unit.

[0007] S2, the ship exhaust gas storage device outputs the ship exhaust gas, and the pressure reducing valve reduces the pressure of the ship exhaust gas output by the ship exhaust gas storage device; the controller controls the flow meter to adjust the flow rate of the ship exhaust gas to reach the specified flow rate range, and then the ship exhaust gas is introduced into the shell of the rotating disk reaction device; the controller controls the peristaltic pump to adjust the flow rate of the high-viscosity alkaline mixed absorption liquid to reach the specified flow rate range, and then the high-viscosity alkaline mixed absorption liquid is introduced into the hollow shaft of the rotating disk reaction device; the high-viscosity alkaline mixed absorption liquid is sprayed out from the spray hole under the action of centrifugal force; the high-viscosity alkaline mixed absorption liquid on both sides of the rotating disk is separated and discharged. The high-viscosity alkaline mixed absorption liquid is refracted multiple times in the first refraction channel and the second refraction channel respectively, and under the action of the first baffle plate and the second baffle plate, it is spread to the two side surfaces of the turntable to form a liquid film; the centrifugal force generated by the high-speed rotation of the turntable brings the high-viscosity alkaline mixed absorption liquid to the edge of the turntable, and the high-viscosity alkaline mixed absorption liquid flies out from the edge of the turntable in the form of liquid lines and droplets and is thrown onto the inner wall of the shell to form a liquid film; the liquid film on the turntable, the liquid lines and droplets in the shell, and the liquid film on the inner wall of the shell are fully in contact with the ship exhaust gas for mass transfer absorption, so as to obtain the treated ship exhaust gas and waste liquid.

[0008] S3, the treated ship exhaust gas is discharged from the rotating disk reaction device and transported to the dryer. The treated ship exhaust gas is dehumidified in the dryer and then transported to the online flue gas analyzer. The controller controls the online flue gas analyzer to detect the concentration of different components in the treated ship exhaust gas in real time. After the detection, the treated ship exhaust gas is passed into the exhaust gas absorption tank filled with alkaline mixed absorption liquid; the online flue gas analyzer transmits the analysis result to the controller, and the controller outputs control instructions to control the power unit, flow meter, online flue gas analyzer and peristaltic pump.

[0009] S4, the high viscosity alkaline mixed absorption liquid in the rotating disk reaction device is in dynamic flow, and the waste liquid obtained after the high viscosity alkaline mixed absorption liquid absorbs the ship's exhaust gas flows to the bottom of the rotating disk reaction device and is discharged into the absorption liquid storage tank.

[0010] S5, cycle from S1 to S4 until the ship exhaust gas treatment is completed.

[0011] Preferably, the rotation speed range of the power device is 500-5000r / min, the flow rate range of the ship exhaust gas is 1-10L / min, and the flow rate range of the high-viscosity alkaline mixed absorption liquid is 1-20L / min.

[0012] Preferably, the high viscosity alkaline mixed absorption liquid is composed of seawater, NaOH, C3H8O3 and H2O2

[0013] The molar concentration of NaOH is in the range of 0.5-2 mol / L, the mass fraction of C3H8O3 is in the range of 5%-15%, and the mass fraction of H2O2 is in the range of 5%-30%.

[0014] Preferably, the CO2, SO x and NO x The volume percentage concentration ranges are 3%-10%, 100-2000 ppm and 200-1500 ppm respectively.

[0015] Preferably, the exhaust gas treatment system includes: a ship exhaust gas storage tank, a pressure reducing valve, a flow meter, an exhaust gas input pipeline, a rotating disk reaction device, an exhaust gas output pipeline, a dryer, an online flue gas analyzer, an exhaust gas absorption tank, an absorption liquid storage tank, an absorption liquid input pipeline, a peristaltic pump, an absorption liquid output pipeline and a controller.

[0016] The ship exhaust gas storage is connected to the rotating disk reaction device through the exhaust gas input pipeline, and the pressure reducing valve and flow meter are arranged on the exhaust gas input pipeline.

[0017] The rotating disk reaction device is connected to the exhaust gas absorption tank through the exhaust gas output pipeline. The dryer and the online flue gas analyzer are arranged on the exhaust gas output pipeline. The ship exhaust gas treated by the rotating disk reaction device first passes through the dryer and then passes into the online flue gas analyzer for online real-time detection. After the treated ship exhaust gas is detected, it is passed into the exhaust gas absorption tank, and the exhaust gas absorption tank contains alkaline mixed absorption liquid.

[0018] The absorption liquid storage tank is connected to the rotating disk reaction device through the absorption liquid input pipeline, and the peristaltic pump is arranged on the absorption liquid input pipeline.

[0019] The rotating disk reaction device is connected to the absorption liquid storage tank through the absorption liquid output pipeline.

[0020] The rotating disk reaction device includes: a shell, a hollow rotating shaft arranged in the shell, a power device for driving the hollow rotating shaft to rotate, a rotating disk sleeved on the hollow rotating shaft, and a spray hole group opened on the hollow rotating shaft, wherein the spray hole group includes a plurality of spray holes, and the opening direction of the spray holes is aligned with the rotating disk; a baffle assembly is also sleeved on the hollow rotating shaft, and the baffle assembly includes a first baffle and a second baffle, and the first baffle and the second baffle are located on both sides of the rotating disk.

[0021] The power device, flow meter, online flue gas analyzer and peristaltic pump are connected to the controller; the controller controls the power device, flow meter, online flue gas analyzer and peristaltic pump.

[0022] Preferably, the first baffle is a conical tube, and the large diameter end of the first baffle faces the turntable; the second baffle is a conical tube, and the large diameter end of the second baffle faces the turntable.

[0023] Preferably, the end surface of the first baffle plate facing the turntable is parallel to the turntable surface; the end surface of the second baffle plate facing the turntable is parallel to the turntable surface.

[0024] Preferably, the rotating disk divides the spray hole into two.

[0025] Preferably, a plurality of the rotating disks, the baffle assemblies corresponding to the plurality of the rotating disks one-to-one, and the spray hole groups corresponding to the plurality of the rotating disks one-to-one are arranged along the axial direction of the hollow rotating shaft, and the spacing between adjacent rotating disks is 10-50 mm.

[0026] Preferably, the exhaust gas treatment system comprises a plurality of the rotating disk reaction devices connected in parallel, the exhaust gas input pipeline, the exhaust gas output pipeline, the absorption liquid input pipeline and the absorption liquid output pipeline are all provided with branches respectively connected to each of the rotating disk reaction devices, and a flow meter is provided on each branch of the exhaust gas input pipeline.

[0027] Beneficial effects:

[0028] The present application discloses a method based on a ship exhaust gas absorption rotating disk reactor, which treats ship exhaust gas through an exhaust gas treatment system using the ship exhaust gas absorption rotating disk reactor, thereby giving full play to the treatment effect of the ship exhaust gas absorption rotating disk reactor and ensuring its treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 This is a schematic cross-sectional view of the structure of a rotating disk reaction device for absorbing ship exhaust gas disclosed in Example 1 of the present invention;

[0031] Figure 2 A structural cutaway top view of a rotating disk reaction device for absorbing exhaust gas from a ship disclosed in Example 1 of the present invention;

[0032] Figure 3 A cross-sectional view of an assembly of a hollow rotating shaft, a rotating disk and a baffle assembly of a ship exhaust gas absorption rotating disk reaction device disclosed in Example 1 of the present invention;

[0033] Figure 4 This is a schematic structural diagram of a rotating disk of a ship exhaust gas absorption rotating disk reaction device disclosed in Example 1 of the present invention;

[0034] Figure 5 This is a system block diagram of an exhaust gas treatment system using a ship exhaust gas absorption rotating disk reaction device disclosed in Example 2 of the present invention.

[0035] 1. Shell; 2. Hollow shaft; 21. First locking nut; 22. First sleeve; 23. Second sleeve; 24. Third sleeve; 25. Second locking nut;

[0036] 3. Power device; 4. Rotating disk; 41. Net-shaped groove; 411. Radial groove; 412. Annular groove; 42. Liquid separation notch;

[0037] 5. spray hole; 61. first baffle; 62. second baffle; 71. liquid inlet pipe; 72. liquid discharge pipe; 81. air inlet pipe; 82. air discharge pipe; 91. first bracket; 92. second bracket; 93. base;

[0038] 10. Ship exhaust gas storage tank; 20. Pressure reducing valve; 30. Flow meter; 40. Dryer; 50. Online flue gas analyzer; 60. Exhaust gas absorption tank; 70. Absorption liquid storage tank; 80. Peristaltic pump. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] A ship exhaust gas absorption rotating disk reaction device, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, it comprises: a shell 1, a hollow rotating shaft 2 arranged in the shell 1, a power device 3 for driving the hollow rotating shaft 2 to rotate, a rotating disk 4 sleeved on the hollow rotating shaft 2, and a spray hole group provided on the hollow rotating shaft 2, wherein the spray hole group comprises a plurality of spray holes 5, and the opening direction of the spray holes 5 is aligned with the rotating disk 4; a baffle assembly is also sleeved on the hollow rotating shaft 2, and the baffle assembly comprises a first baffle 61 and a second baffle 62, and the first baffle 61 and the second baffle 62 are located on both sides of the rotating disk 4, and a first refraction channel is formed between the first baffle 61 and the rotating disk 4, and a second refraction channel is formed between the second baffle 62 and the rotating disk 4. After the high-viscosity alkaline mixed absorption liquid is sprayed out through the spray hole 5, it splashes outward under the action of centrifugal force, and the high-viscosity alkaline mixed absorption liquid on both sides of the rotating disk 4 is blocked by the first baffle 61 and the second baffle 62 respectively, thereby preventing a large part of the high-viscosity alkaline mixed absorption liquid from directly flying to the inner wall of the shell 1 without contacting the rotating disk 4. Take the high-viscosity alkaline mixed absorption liquid between the first baffle 61 and the turntable 4 as an example for explanation: after the high-viscosity alkaline mixed absorption liquid is sprayed out, it is continuously refracted in the first refraction channel between the first baffle 61 and the turntable 4 and then transmitted out of the first refraction channel, and the high-viscosity alkaline mixed absorption liquid is continuously in contact with the turntable 4, so that the amount of the splashed high-viscosity alkaline mixed absorption liquid is gradually reduced, so that most of the sprayed high-viscosity alkaline mixed absorption liquid is attached to the turntable 4; and due to the continuous refraction, the speed of the splashed high-viscosity alkaline mixed absorption liquid will gradually decrease, which is also conducive to the high-viscosity alkaline mixed absorption liquid attaching to the turntable 4. Further, the high-viscosity alkaline mixed absorption liquid rotates at high speed with the turntable 4 to perform a mass transfer absorption process, and the high-viscosity alkaline mixed absorption liquid covers the surface of the turntable 4, thereby improving the mass transfer absorption effect of the high-viscosity alkaline mixed absorption liquid and the mass transfer absorption efficiency of the turntable 4 surface area, thereby improving the operation efficiency of the reaction device.

[0042] Specifically, the reaction device can be set to a vertical or horizontal type as needed. In this embodiment, a horizontal structure is used for explanation. The shell 1 is cylindrical and made of plexiglass, which is convenient for observing and recording the distribution characteristics of the high-viscosity alkaline mixed absorption liquid on the surface of the turntable 4 and the diffusion width on the inner wall of the shell 1 during operation; its two ends are respectively fixed on the first bracket 91 and the second bracket 92, and the first bracket 91 and the second bracket 92 are made of stainless steel. The two ends of the shell 1 are respectively sealed with the first bracket 91 and the second bracket 92 through a sealing structure, and the two brackets are vertically installed on the base 93. The sealing structure is a prior art and will not be repeated here.

[0043] Preferably, one end of the hollow shaft 2 is connected to the power device 3, and the other end is connected to the liquid inlet pipe 71, and a liquid discharge pipe 72 is also provided below the shell 1; an air inlet pipe 81 and an exhaust pipe 82 are also provided on the shell 1. The high-viscosity alkaline mixed absorption liquid is introduced into the hollow shaft 2 through the liquid inlet pipe 71, and the high-viscosity alkaline mixed absorption liquid in the cavity of the shell 1 is discharged through the exhaust pipe 72. The ship exhaust gas enters the shell 1 through the air inlet pipe 81 and fully contacts with the high-viscosity alkaline mixed absorption liquid, and the treated gas is discharged through the exhaust pipe 82. The air inlet pipe 81 is connected to the flowmeter 30, and the liquid inlet pipe 71 is connected to the peristaltic pump 80. In this embodiment, the diameters of the air inlet pipe 81, the exhaust pipe 82 and the liquid discharge pipe 72 are all 6 mm, and the diameter of the liquid inlet pipe 71 is 6 mm.

[0044] Preferably, the axes of the air inlet pipe 81 and the exhaust pipe 82 are arranged vertically, and the axes of the air inlet pipe 81 and the exhaust pipe 82 are perpendicular to the axis of the hollow rotating shaft 2, so that the ship's exhaust gas enters in a direction parallel to the turntable 4 and is fully contacted with the high-viscosity alkaline mixed absorption liquid attached to the turntable 4.

[0045] Specifically, one end of the hollow shaft 2 is open and the other end is closed. The open end of the hollow shaft 2 passes through the first bracket 91 and is connected to the liquid inlet pipe 71, and the closed end passes through the second bracket 92 and is connected to the power device 3. Bearings are installed between the two ends of the hollow shaft 2 and the first bracket 91 and the second bracket 92, respectively, and are sealed by a sealing structure. The sealing structure is a prior art and will not be described in detail here.

[0046] Specifically, the power device 3 can use a high-speed motor, which is mounted on the second bracket 92, and the output end of the high-speed motor is connected to the hollow shaft 2 through a coupling. The high-speed motor is matched with a tachometer and connected to a controller, and the controller controls the high-speed motor.

[0047] Preferably, the first baffle 61 is a conical tube, and the large diameter end of the first baffle 61 faces the turntable 4; the second baffle 62 is a conical tube, and the large diameter end of the second baffle 62 faces the turntable 4. The first baffle 61 and the second baffle 62 are arranged at a certain angle to help change the refraction angle of the sprayed high-viscosity alkaline mixed absorption liquid, so that it is refracted multiple times. In this embodiment, the cone angles of the first baffle 61 and the second baffle 62 are both 120°.

[0048] Preferably, the end surface of the first baffle 61 facing the turntable 4 is parallel to the disk surface of the turntable 4; the end surface of the second baffle 62 facing the turntable 4 is parallel to the disk surface of the turntable 4. Taking the first baffle 61 as an example, after the high-viscosity alkaline mixed absorption liquid is refracted to the end surface of the first baffle 61 facing the turntable 4, the high-viscosity alkaline mixed absorption liquid is refracted in the gap between the end surface of the first baffle 61 facing the turntable 4 and the disk surface of the turntable 4, and the high-viscosity alkaline mixed absorption liquid is wavy and leaves the area covered by the first baffle 61 along the radial direction of the turntable 4, and then distributed on the end surface of the turntable 4. In this embodiment, the spacing between the end face of the large diameter end of the first baffle 61 and the disk surface of the turntable 4 is 2-10mm, and the difference between the inner and outer radii of the end face of the large diameter end of the first baffle 61 is 1-3mm; the spacing between the end face of the large diameter end of the second baffle 62 and the disk surface of the turntable 4 is 2-10mm, and the difference between the inner and outer radii of the end face of the large diameter end of the second baffle 62 is 1-3mm.

[0049] Specifically, the ratio of the outer diameter of the large diameter end of the first baffle 61 to the outer diameter of the rotating disk 4 is 1:10-1:5. In this embodiment, the thickness of the rotating disk 4 is 1 mm, and the diameter of the disk is 100 mm.

[0050] Preferably, the turntable 4 divides the spray hole 5 into two parts, and the turntable 4 corresponds to the middle position of the spray hole 5, and the high-viscosity alkaline mixed absorption liquid entering the spray hole 5 can be sprayed to both sides of the turntable 4. Since the high-viscosity alkaline mixed absorption liquid has a gradient in the axial direction of the hollow shaft 2 after entering the hollow shaft 2, the spray holes 5 on both sides of the turntable 4 are likely to cause the speed difference of the high-viscosity alkaline mixed absorption liquid on both sides of the turntable 4 to be too large. Spraying the high-viscosity alkaline mixed absorption liquid to both sides of the turntable 4 through one spray hole 5 can reduce the speed difference of the high-viscosity alkaline mixed absorption liquid sprayed from both sides of the turntable 4, which is conducive to the uniform distribution of the high-viscosity alkaline mixed absorption liquid on both sides of the turntable 4. In this embodiment, the inner hole diameter of the hollow shaft 2 is 8.05mm, and the diameter of the spray hole 5 is 3mm.

[0051] Specifically, the plurality of spray holes 5 of the spray hole group are evenly distributed around the circumference of the axis of the hollow rotating shaft 2 , so that the high-viscosity alkaline mixed absorption liquid can be evenly sprayed toward the rotating disk 4 along the circumferential direction.

[0052] Preferably, multiple turntables 4, baffle assemblies corresponding to the multiple turntables 4, and spray hole groups corresponding to the multiple turntables 4 are arranged along the axial direction of the hollow shaft 2. The multiple turntables 4 can increase the gas-liquid contact area, which is beneficial to improving the mass transfer efficiency. After the high-viscosity alkaline mixed absorption liquid flies out from the edge of the turntable 4, it will spread on the inner wall of the shell 1 to form an annular liquid film. The spacing between adjacent turntables 4 is set to 10mm-50mm to ensure that the multiple annular liquid films formed by the multiple turntables 4 do not overlap or have too large spacing, so as to make full use of the effective gas-liquid contact area of ​​the inner wall of the shell 1 to achieve sufficient mixing of ship exhaust gas and high-viscosity alkaline mixed absorption liquid.

[0053] Specifically, the axes of the air inlet pipe 81 and the exhaust pipe 82 are located between two adjacent turntables 4 .

[0054] Specifically, the hollow rotating shaft 2 is a stepped shaft, and a plurality of rotating disks 4 are fixed on the hollow rotating shaft 2 by means of a first locking nut 21, a first sleeve 22 and a second sleeve 23. This embodiment is described by taking the installation of three rotating disks 4 as an example, wherein the first rotating disk 4 is sleeved on the shaft head of the hollow rotating shaft 2 and abutted against the shaft shoulder of the hollow rotating shaft 2, and then the first first sleeve 22 is sleeved to press the first rotating disk 4. The second rotating disk 4 is sleeved on the hollow rotating shaft 2 and abutted against the end face of the first first sleeve 22, and then the second first sleeve 22 is sleeved to press the second rotating disk 4. The third rotating disk 4 is sleeved on the hollow rotating shaft 2 and abutted against the end face of the second first sleeve 22, and then the second sleeve 23 is sleeved to press the third rotating disk 4. The first locking nut 21 is screwed onto the hollow rotating shaft 2, and the first locking nut 21 presses the second sleeve 23 to fix the three rotating disks 4 on the hollow rotating shaft 2.

[0055] Specifically, the first sleeve 22 is fixedly sleeved with a first baffle 61 and a second baffle 62, and the second sleeve 23 is fixedly sleeved with a first baffle 61. The hollow shaft 2 is also sleeved with a third sleeve 24, which is located on the side of the shoulder away from the rotating disk 4 and abuts against the shoulder, and is fixed to the hollow shaft 2 by a second locking nut 25. The third sleeve 24 is fixedly sleeved with a second baffle 62. The first sleeve 22 and the first baffle 61 and the second baffle 62 thereon, the second sleeve 23 and the first baffle 61 thereon, and the third sleeve 24 and the second baffle 62 thereon can all be integrally processed and formed.

[0056] Specifically, the turntable 4 and the hollow shaft 2 can be connected by splines to limit relative rotation, for example, splines are provided on the hollow shaft 2 and external threads are processed, and spline grooves are provided on the turntable 4, the first sleeve 22, the second sleeve 23 and the third sleeve 24, which are not shown in the figure. After the turntable 4, the first sleeve 22 and the second sleeve 23 are installed in sequence, the first locking nut 21 is screwed on to fix the turntable 4, and after the third sleeve 24 is installed, the second locking nut 25 is screwed on to fix the third sleeve 24.

[0057] Specifically, the outer diameters of the first sleeve 22, the second sleeve 23 and the third sleeve 24 are consistent with the outer diameter of the shoulder of the hollow rotating shaft 2, so as to reduce the speed difference of the high-viscosity alkaline mixed absorption liquid sprayed from both sides of the rotating disk 4. The first sleeve 22, the second sleeve 23 and the third sleeve 24 are uniformly provided with a plurality of long holes along the circumferential direction, and the plurality of long holes correspond to the plurality of spray holes 5 of the corresponding spray hole group one by one, so as to ensure that the spray holes 5 can leak normally after being installed in place.

[0058] Preferably, mesh grooves 41 are provided on both sides of the turntable 4, and the mesh grooves 41 include a plurality of radial grooves 411 evenly distributed along the circumferential direction of the turntable 4 and a plurality of concentric annular grooves 412 arranged along the radial direction of the turntable 4. That is, the plurality of radial grooves 411 are arranged in a spoke shape, and the plurality of concentric annular grooves 412 intersect with the radial grooves 411. The mesh grooves 41 can increase the specific surface area of ​​the turntable 4 and the residence time of the high-viscosity alkaline mixed absorption liquid on the turntable 4, thereby improving the mass transfer absorption efficiency of the turntable 4 surface area. In this embodiment, the depth of the mesh grooves 41 is 0.1-0.3 mm.

[0059] Preferably, the radial grooves 411 on the two sides of the turntable 4 correspond to each other, and the annular grooves 412 are staggered along the radial direction of the turntable 4 to ensure the rigidity of the turntable 4 and prevent the edge of the turntable 4 from shaking greatly.

[0060] Preferably, a plurality of liquid separation gaps 42 are provided at the edge of the turntable 4, the liquid separation gaps 42 are located between two adjacent radial grooves 411, and the plurality of liquid separation gaps 42 are evenly distributed at the edge of the turntable 4. When the high-viscosity alkaline mixed absorption liquid flows to the edge of the turntable 4, the high-viscosity alkaline mixed absorption liquid will be divided by the liquid separation gaps 42, and the high-viscosity alkaline mixed absorption liquid will fly out of the liquid separation gaps 42 in the form of liquid lines and liquid droplets, so that more liquid lines and liquid droplets are generated in the cavity of the shell 1, thereby increasing the gas-liquid mixing effect in the cavity of the shell 1, and improving the mass transfer absorption efficiency in the cavity of the shell 1.

[0061] Example 2

[0062] This embodiment also discloses an exhaust gas treatment system using the ship exhaust gas absorption rotating disk reaction device in embodiment 1. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the system includes: a ship exhaust gas storage tank 10, a pressure reducing valve 20, a flow meter 30, an exhaust gas input pipeline, a rotating disk reaction device, an exhaust gas output pipeline, a dryer 40, an online flue gas analyzer 50, an exhaust gas absorption tank 60, an absorption liquid storage tank 70, an absorption liquid input pipeline, a peristaltic pump 80, an absorption liquid output pipeline and a controller.

[0063] The ship exhaust gas storage 10 is connected to the intake pipe 81 of the rotating disk reaction device through the exhaust gas input pipeline. The exhaust gas input pipeline is provided with a pressure reducing valve 20 and a flow meter 30. The pressure reducing valve 20 adjusts the pressure of the ship exhaust gas output from the ship exhaust gas storage 10, and the flow meter 30 controls the flow of the ship exhaust gas entering the intake pipe 81. Furthermore, the exhaust gas input pipeline is also provided with a solenoid valve I, which is located between the flow meter 30 and the intake pipe 81 and is used to control the intake.

[0064] The exhaust pipe 82 of the rotating disk reaction device is connected to the exhaust gas absorption tank 60 through the exhaust gas output pipeline. The dryer 40 and the online flue gas analyzer 50 are arranged on the exhaust gas output pipeline. The treated ship exhaust gas is first dried by the dryer 40 and then passed into the online flue gas analyzer 50 for online real-time detection. The ship exhaust gas after detection is passed into the exhaust gas absorption tank 60. The exhaust gas absorption tank 60 contains alkaline mixed absorption liquid for secondary absorption of the ship exhaust gas. Furthermore, a solenoid valve II is also arranged on the exhaust gas output pipeline. The solenoid valve II is located between the exhaust pipe 82 and the dryer 40 to control the exhaust.

[0065] The absorption liquid storage tank 70 is connected to the liquid inlet pipe 71 through the absorption liquid input pipeline. A peristaltic pump 80 is arranged on the absorption liquid input pipeline. The peristaltic pump 80 regulates the flow rate of the high-viscosity alkaline mixed absorption liquid. Furthermore, a solenoid valve III is also arranged on the absorption liquid input pipeline. The solenoid valve III is located between the liquid inlet pipe 71 and the peristaltic pump 80 and is used to control the liquid inlet.

[0066] The drain pipe 72 is connected to the absorption liquid storage tank 70 through the absorption liquid output pipeline, collects the high-viscosity alkaline mixed absorption liquid for recycling, and replaces it when the high-viscosity alkaline mixed absorption liquid is saturated. Furthermore, a solenoid valve IV is also provided on the absorption liquid input pipeline, and the solenoid valve IV is located between the drain pipe 72 and the absorption liquid storage tank 70 to control the discharge.

[0067] The power device 3, flow meter 30, solenoid valve I, solenoid valve II, online flue gas analyzer 50, peristaltic pump 80, solenoid valve III, and solenoid valve IV are all electrically connected to the controller, and the controller controls the power device 3, flow meter 30, solenoid valve I, solenoid valve II, online flue gas analyzer 50, peristaltic pump 80, solenoid valve III and solenoid valve IV.

[0068] Example 3

[0069] The difference between this embodiment and embodiment 2 is that the exhaust gas treatment system includes a plurality of rotating disk reaction devices connected in parallel.

[0070] The exhaust gas input pipeline, the exhaust gas output pipeline, the absorption liquid input pipeline and the absorption liquid output pipeline are all provided with branches respectively connected to each rotating disk reaction device, and each branch of the exhaust gas input pipeline is provided with a flow meter 30. The exhaust gas treatment system is provided with multiple rotating disk reaction devices in parallel according to the demand to meet the removal efficiency of the ship's exhaust gas.

[0071] Example 4

[0072] This embodiment discloses a method based on a ship exhaust gas absorption rotating disk reactor, and performs exhaust gas treatment through an exhaust gas treatment system using the ship exhaust gas absorption rotating disk reactor. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the method comprises the following steps:

[0073] S1, start the exhaust gas treatment system, the controller controls the high-speed motor of the power device 3 to start, and the controller adjusts the speed of the high-speed motor of the power device 3 to reach a specified speed range.

[0074] S2, the ship exhaust gas storage 10 outputs the ship exhaust gas, and the pressure reducing valve 20 reduces the pressure of the ship exhaust gas output from the ship exhaust gas storage 10; the controller controls the flow meter 30 to adjust the flow rate of the ship exhaust gas to reach the specified flow rate range, and then the ship exhaust gas is introduced into the rotating disk reaction device; the exhaust gas input pipeline is connected to the air inlet pipe 81 of the rotating disk reaction device, and the ship exhaust gas is introduced through the air inlet pipe 81. The absorption liquid storage tank 70 outputs high-viscosity alkaline mixed absorption liquid under the action of the peristaltic pump 80, and the controller controls the peristaltic pump 80 to adjust the flow rate of the high-viscosity alkaline mixed absorption liquid to reach the specified flow rate range, and then the high-viscosity alkaline mixed absorption liquid is introduced into the rotating disk reaction device; the absorption liquid storage tank 70 is connected to the liquid inlet pipe 71 of the rotating disk reaction device through the absorption liquid input pipeline, and the high-viscosity alkaline mixed absorption liquid is introduced into the hollow shaft 2 through the liquid inlet pipe 71. The high-viscosity alkaline mixed absorption liquid enters the hollow rotating shaft 2, and is sprayed out from the spray hole 5 under the action of centrifugal force; the high-viscosity alkaline mixed absorption liquid on both sides of the turntable 4 is refracted multiple times in the first refraction channel and the second refraction channel respectively, and the high-viscosity alkaline mixed absorption liquid is spread on the two side surfaces of the turntable 4 to form a liquid film under the action of the first baffle 61 and the second baffle 62; the centrifugal force generated by the high-speed rotation of the turntable 4 brings the high-viscosity alkaline mixed absorption liquid to the edge of the turntable 4, and the high-viscosity alkaline mixed absorption liquid is divided by the liquid separation gap 42, and the high-viscosity alkaline mixed absorption liquid flies out from the edge of the turntable 4 in the form of liquid lines and droplets and is thrown onto the inner wall of the shell 1 to form a liquid film; the ship exhaust gas is fully in contact with the liquid film on the turntable 4, the liquid lines and droplets in the shell 1, and the liquid film on the inner wall of the shell 1 for mass transfer absorption, so as to obtain the treated ship exhaust gas and waste liquid.

[0075] S3, the treated ship exhaust gas is discharged from the rotating disk reaction device and transported to the dryer 40. The treated ship exhaust gas is dehydrated in the dryer 40 and then transported to the online flue gas analyzer 50. The controller controls the online flue gas analyzer 50 to detect the concentration of different components in the treated ship exhaust gas in real time. The treated ship exhaust gas is passed into the exhaust gas absorption tank 60 after detection; the exhaust pipe 82 of the rotating disk reaction device is connected to the exhaust gas absorption tank 60 through the exhaust gas output pipeline, and the treated ship exhaust gas is discharged from the exhaust pipe 82; there may be a very small proportion of pollutant gas components remaining in the treated ship exhaust gas, and the exhaust gas absorption tank 60 filled with alkaline mixed absorption liquid is used to further absorb the treated ship exhaust gas to avoid secondary pollution. The online flue gas analyzer 50 transmits the analysis results to the controller, and the controller outputs control instructions to control the power device 3, the flow meter 30, the online flue gas analyzer 50 and the peristaltic pump 80.

[0076] S4, the high viscosity alkaline mixed absorption liquid in the rotating disk reaction device is in dynamic flow, and the waste liquid obtained after the high viscosity alkaline mixed absorption liquid absorbs the ship exhaust gas flows to the bottom of the rotating disk reaction device and is discharged into the absorption liquid storage tank 70. The drain pipe 72 of the rotating disk reaction device is connected to the absorption liquid storage tank 70 through the absorption liquid output pipeline, and the treated high viscosity alkaline mixed absorption liquid is discharged from the drain pipe 72 to the absorption liquid storage tank 70, so that the high viscosity alkaline mixed absorption liquid is recycled and the absorption capacity of the high viscosity alkaline mixed absorption liquid is fully utilized. The treatment efficiency of the rotating disk reaction device can be obtained by the detection data of the components in the treated ship exhaust gas by the online flue gas analyzer 50, and then the absorption saturation degree of the high viscosity alkaline mixed absorption liquid can be obtained. When the high viscosity alkaline mixed absorption liquid basically no longer has the absorption capacity, it is re-prepared and replaced.

[0077] S5, cycle from S1 to S4 until the ship exhaust gas treatment is completed.

[0078] Preferably, the speed range of the high-speed motor of the power device 3 is 500-5000r / min, the flow rate range of the ship exhaust gas is 1-10L / min, and the flow rate range of the high-viscosity alkaline mixed absorption liquid is 1-20L / min. By controlling the flow rate of the ship exhaust gas and the flow rate of the high-viscosity alkaline mixed absorption liquid in the rotating disk reaction device, the gas-liquid ratio in the rotating disk reaction device is ensured to be within a suitable range, thereby improving the absorption efficiency of the ship exhaust gas.

[0079] Preferably, the high-viscosity alkaline mixed absorption liquid is prepared from seawater, NaOH, C3H8O3 and H2O2, the molar concentration range of NaOH is 0.5-2 mol / L, the mass fraction range of C3H8O3 is 5%-15%, and the mass fraction range of H2O2 is 5%-30%, which can ensure that the high-viscosity alkaline mixed absorption liquid can efficiently absorb ship exhaust gas.

[0080] Preferably, CO2, SO x and NO x The volume percentage concentration ranges are 3%-10%, 100-2000ppm and 200-1500ppm respectively. The main components of ship exhaust gas include CO2, SO x and N Ox However, the diesel engine models and fuel types used by different ships are different, resulting in different volume percentage concentrations of ship exhaust components. Therefore, this method is not suitable for CO2, SO x and NO x The volume percentage concentration range of 3%-10%, 100-2000ppm and 200-1500ppm is more effective in treating ship exhaust gas.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method based on a ship exhaust gas absorption rotating disk reactor, wherein exhaust gas is treated by an exhaust gas treatment system using a ship exhaust gas absorption rotating disk reactor, characterized in that: The following steps are involved: S1, starting the exhaust gas treatment system, the controller controls the power device (3) to start, and the controller adjusts the speed of the power device (3); S2, the ship exhaust gas storage device (10) outputs the ship exhaust gas, and the pressure reducing valve (20) reduces the pressure of the ship exhaust gas output by the ship exhaust gas storage device (10); the controller controls the flow meter (30) to adjust the flow rate of the ship exhaust gas to reach a specified flow rate range, and then passes the ship exhaust gas into the shell (1) of the rotating disk reaction device; the controller controls the peristaltic pump (80) to adjust the flow rate of the high-viscosity alkaline mixed absorption liquid to reach a specified flow rate range, and then passes the high-viscosity alkaline mixed absorption liquid into the hollow shaft (2) of the rotating disk reaction device; the high-viscosity alkaline mixed absorption liquid is sprayed out from the spray hole (5) under the action of centrifugal force; the high-viscosity alkaline mixed absorption liquid on both sides of the rotating disk (4) is separated The high-viscosity alkaline mixed absorption liquid is refracted multiple times in the first refraction channel and the second refraction channel, and the high-viscosity alkaline mixed absorption liquid is spread on both sides of the turntable (4) to form a liquid film under the action of the first baffle (61) and the second baffle (62); the centrifugal force generated by the high-speed rotation of the turntable (4) brings the high-viscosity alkaline mixed absorption liquid to the edge of the turntable (4), and the high-viscosity alkaline mixed absorption liquid flies out from the edge of the turntable (4) in the form of liquid lines and liquid droplets and is thrown onto the inner wall of the shell (1) to form a liquid film; the liquid film on the turntable (4), the liquid lines and liquid droplets in the shell (1), and the liquid film on the inner wall of the shell (1) are fully in contact with the ship exhaust gas for mass transfer absorption, thereby obtaining treated ship exhaust gas and waste liquid; S3, the treated ship exhaust gas is discharged from the rotating disk reaction device and transported to the dryer (40), the treated ship exhaust gas is dehumidified in the dryer (40) and then transported to the online flue gas analyzer (50), the controller controls the online flue gas analyzer (50) to detect the concentration of different components in the treated ship exhaust gas online in real time, and the treated ship exhaust gas is passed into the exhaust gas absorption tank (60) filled with alkaline mixed absorption liquid after detection; the online flue gas analyzer (50) transmits the analysis result to the controller, and the controller outputs a control instruction to control the power device (3), the flow meter (30), the online flue gas analyzer (50) and the peristaltic pump (80); S4, the high-viscosity alkaline mixed absorption liquid in the rotating disk reaction device is in a dynamic flow state, and the waste liquid obtained after the high-viscosity alkaline mixed absorption liquid absorbs the ship exhaust gas flows to the bottom of the rotating disk reaction device and is discharged into the absorption liquid storage tank (70); S5, cyclically performing S1 to S4 until the ship exhaust gas treatment is completed; The rotating disk reaction device comprises: a shell (1), a hollow rotating shaft (2) arranged in the shell (1), a power device (3) for driving the hollow rotating shaft (2) to rotate, a rotating disk (4) sleeved on the hollow rotating shaft (2), and a spray hole group provided on the hollow rotating shaft (2), wherein the spray hole group comprises a plurality of spray holes (5), and the opening direction of the spray holes (5) is aligned with the rotating disk (4); a baffle assembly is also sleeved on the hollow rotating shaft (2), and the baffle assembly comprises a first baffle (61) and a second baffle (62), wherein the first baffle (61) and the second baffle (62) are located on both sides of the rotating disk (4), a first refraction channel is formed between the first baffle (61) and the rotating disk (4), and a second refraction channel is formed between the second baffle (62) and the rotating disk (4); The first baffle (61) is a conical tube, with the large diameter end of the first baffle (61) facing the rotating disk (4); the second baffle (62) is a conical tube, with the large diameter end of the second baffle (62) facing the rotating disk (4), and the cone angles of the first baffle (61) and the second baffle (62) are both 120°.

2. A method based on a rotating disk reaction device for absorbing ship exhaust gas according to claim 1, characterized in that: The rotation speed range of the power device (3) is 500-5000 r / min, the flow rate range of the ship exhaust gas is 1-10 L / min, and the flow rate range of the high-viscosity alkaline mixed absorption liquid is 1-20 L / min.

3. A method based on a rotating disk reaction device for absorbing ship exhaust gas according to claim 1, characterized in that: The high-viscosity alkaline mixed absorption liquid is prepared from seawater, NaOH, C3H8O3 and H2O2, the molar concentration of NaOH is in the range of 0.5-2 mol / L, the mass fraction of C3H8O3 is in the range of 5%-15%, and the mass fraction of H2O2 is in the range of 5%-30%.

4. A method based on a rotating disk reaction device for absorbing ship exhaust gas according to claim 1, characterized in that: The CO2, SO x and NO x The volume percentage concentration ranges are 3%-10%, 100-2000 ppm and 200-1500 ppm respectively.

5. The method based on the ship exhaust gas absorption rotating disk reaction device according to claim 1 is characterized in that: The exhaust gas treatment system comprises: a ship exhaust gas storage device (10), a pressure reducing valve (20), a flow meter (30), an exhaust gas input pipeline, a rotating disk reaction device, an exhaust gas output pipeline, a dryer (40), an online flue gas analyzer (50), an exhaust gas absorption tank (60), an absorption liquid storage tank (70), an absorption liquid input pipeline, a peristaltic pump (80), an absorption liquid output pipeline, and a controller; The ship exhaust gas storage device (10) is connected to the rotating disk reaction device via the exhaust gas input pipeline, and the exhaust gas input pipeline is provided with the pressure reducing valve (20) and the flow meter (30); The rotating disk reaction device is connected to the exhaust gas absorption tank (60) through the exhaust gas output pipeline. The dryer (40) and the online flue gas analyzer (50) are arranged on the exhaust gas output pipeline. The ship exhaust gas treated by the rotating disk reaction device first passes through the dryer (40) and then passes into the online flue gas analyzer (50) for online real-time detection. After the treated ship exhaust gas is detected, it passes into the exhaust gas absorption tank (60). The exhaust gas absorption tank (60) contains an alkaline mixed absorption liquid. The absorption liquid storage tank (70) is connected to the rotating disk reaction device via the absorption liquid input pipeline, and the peristaltic pump (80) is arranged on the absorption liquid input pipeline; The rotating disk reaction device is connected to the absorption liquid storage tank (70) via the absorption liquid output pipeline; The power device (3), the flow meter (30), the online flue gas analyzer (50), and the peristaltic pump (80) are connected to the controller; and the controller controls the power device (3), the flow meter (30), the online flue gas analyzer (50), and the peristaltic pump (80).

6. A method based on a rotating disk reaction device for absorbing ship exhaust gas according to claim 5, characterized in that: The end surface of the first baffle (61) facing the turntable (4) is parallel to the disk surface of the turntable (4); and the end surface of the second baffle (62) facing the turntable (4) is parallel to the disk surface of the turntable (4).

7. The method based on the ship exhaust gas absorption rotating disk reaction device according to claim 1 is characterized in that: The rotating disk (4) divides the spray hole (5) into two.

8. The method based on the ship exhaust gas absorption rotating disk reaction device according to claim 1 is characterized in that: A plurality of rotating disks (4), baffle assemblies corresponding one-to-one to the plurality of rotating disks (4), and spray hole groups corresponding one-to-one to the plurality of rotating disks (4) are arranged along the axial direction of the hollow rotating shaft (2), and the spacing between adjacent rotating disks (4) is 10-50 mm.

9. The method based on the ship exhaust gas absorption rotating disk reaction device according to claim 5 is characterized in that: The exhaust gas treatment system comprises a plurality of rotating disk reaction devices connected in parallel, the exhaust gas input pipeline, the exhaust gas output pipeline, the absorption liquid input pipeline and the absorption liquid output pipeline are all provided with branches respectively connected to each of the rotating disk reaction devices, and a flow meter (30) is provided on each branch of the exhaust gas input pipeline.

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