New type of rotary disc reactor for absorbing ship exhaust gases

Abstract

In a rotary disc type reactor for absorbing exhaust gases from ships, the absorption efficiency due to mass transfer of the absorbent liquid and the reaction efficiency of the reactor are improved. [Solution] A power unit 3 rotates a hollow rotating shaft 2, a rotating disc 4 fitted onto the hollow rotating shaft 2, a group of injection holes opened in the hollow rotating shaft 2, the group of injection holes including a plurality of injection holes, the opening direction of the injection holes is set toward the rotating disc 4, a baffle component is further fitted onto the hollow rotating shaft 2, the baffle component includes a first baffle and a second baffle, the first baffle and the second baffle are located on both sides of the rotating disc 4, a first reflection passage is formed between the first baffle and the rotating disc 4, and a second reflection passage is formed between the second baffle and the rotating disc 4. By providing the first baffle and the second baffle on both sides of the rotating disc 4, the first baffle and the second baffle block the absorbent liquid ejected from the injection holes to prevent the scattering of the absorbent liquid, and most of the ejected absorbent liquid is scattered on the surface of the rotating disc 4.

Description

Technical Field

[0001] The present invention relates to the technical field of a supergravity reactor, and particularly to a novel rotating disk reactor for ship exhaust gas absorption.

Background Art

[0002] The supergravity rotating bed has characteristics such as high mass transfer efficiency, small equipment size, short residence time, strong clogging resistance, simple operation, and easy maintenance, so it is widely used in exhaust gas treatment. Due to its compact structure, it is particularly suitable for ship exhaust gas treatment.

[0003] Chinese Patent Publication CN111335986A discloses an atomization device including a casing, a rotating shaft, and a power device, wherein the power device is connected to the rotating shaft, the rotating shaft is a hollow rotating shaft and is provided in the casing, a rotating disk device is inserted into the rotating shaft, the rotating disk device has a planar shape or a curved surface shape, a plurality of injection holes are opened in the rotating shaft, and the opening direction of the injection holes is provided toward the rotating disk device. A plurality of rotating disks are provided. The injection holes are drilled obliquely with respect to the central axis of the rotating shaft, the inclination angle is 30° - 60°, the number is plural, and the injection holes are provided above the rotating disk device. However, after the absorption liquid is introduced into the rotating shaft, with the high-speed rotation of the rotating shaft, it is ejected from the injection holes at high speed due to the action of centrifugal force and collides above the rotating disk device along the inclined direction. As a result, the absorption liquid is likely to scatter, and only a very small part of the absorption liquid is sprayed on the surface of the rotating disk, so the absorption efficiency due to the mass transfer of the absorption liquid decreases.

Summary of the Invention

[0004] The present invention provides a novel rotating disk reactor for ship exhaust gas absorption, which solves the technical problem of the existing device that the absorption liquid is likely to scatter, and only a very small part of the absorption liquid is sprayed on the surface of the rotating disk, resulting in a decrease in the absorption efficiency due to the mass transfer of the absorption liquid.

[0005] To achieve the above objective, the technical solutions of the present invention are as follows. This is a new type of rotary-disc reactor for absorbing exhaust gas from ships, comprising a casing, a hollow rotating shaft provided inside the casing, a power unit for rotating the hollow rotating shaft, a rotating disk fitted onto the hollow rotating shaft, and a group of injection holes opened in the hollow rotating shaft, wherein the group of injection holes includes multiple injection holes, the opening direction of the injection holes is provided toward the rotating disk, and a baffle component is further fitted onto the hollow rotating shaft, the baffle component includes a first baffle and a second baffle, the first baffle and the second baffle are located on both sides of the rotating disk, a first reflection passage is formed between the first baffle and the rotating disk, and a second reflection passage is formed between the second baffle and the rotating disk.

[0006] Preferably, the first baffle is a conical tube with its large-diameter end facing the turntable, and the second baffle is a conical tube with its large-diameter end facing the turntable.

[0007] Preferably, the end face of the first baffle facing the rotating disc is provided parallel to the surface of the rotating disc, and the end face of the second baffle facing the rotating disc is provided parallel to the surface of the rotating disc.

[0008] Preferably, the rotating disc divides the injection port into two.

[0009] Preferably, a plurality of rotating discs, a baffle component corresponding one-to-one with each of the rotating discs, and a group of injection holes corresponding one-to-one with each of the rotating discs are provided along the axial direction of the hollow rotating shaft, with the spacing between adjacent rotating discs being 10 mm to 50 mm.

[0010] Preferably, a mesh groove is provided on both sides of the rotating disc, and the mesh groove consists of a plurality of radial grooves uniformly arranged along the circumferential direction of the rotating disc and a plurality of concentric annular grooves arranged in the radial direction of the rotating disc.

[0011] Preferably, the radial grooves on both sides of the turntable are corresponding to each other, and the annular grooves are offset along the radial direction of the turntable.

[0012] Preferably, a plurality of liquid separation notches are provided on the edge of the rotating disk, and the liquid separation notches are located between two adjacent radial grooves.

[0013] Preferably, one end of the hollow rotating shaft is connected to a power unit and the other end is connected to a fluid supply pipe, a drain pipe is further provided below the casing, and an intake pipe and an exhaust pipe are further provided in the casing.

[0014] Preferably, the axes of the intake pipe and the exhaust pipe are positioned perpendicular to each other, and the axes of the intake pipe and the exhaust pipe are perpendicular to the axis of the hollow rotating shaft. [Effects of the Invention]

[0015] According to the novel rotary disc type reactor for absorbing ship exhaust gas disclosed in this application, by providing a first baffle and a second baffle on both sides of the rotary disc, the first and second baffles block the absorbent liquid ejected from the injection holes, preventing the liquid from scattering, and causing most of the ejected absorbent liquid to be dispersed onto the surface of the rotary disc. This improves the absorption efficiency due to mass transfer of the absorbent liquid and the reaction efficiency of the reactor.

[0016] To more clearly explain embodiments of the present invention or technical solutions in the prior art, the following is a brief introduction of the drawings necessary for describing the embodiments or prior art. Clearly, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these without requiring any creative effort. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic cross-sectional view of a new type of rotary disc reactor for absorbing ship exhaust gas according to Embodiment 1 of the present invention. [Figure 2] This is a top cross-sectional view of the structure of a new type of rotary disc reactor for absorbing ship exhaust gas according to Embodiment 1 of the present invention. [Figure 3]This is a cross-sectional view of an assembly of a hollow rotating shaft, a rotating disk, and a baffle component of a new type of rotary disk reactor for absorbing exhaust gas from ships, according to Embodiment 1 of the present invention. [Figure 4] This is a schematic diagram of the structure of the turntable of a new type of turntable reactor for absorbing exhaust gas from ships, according to Embodiment 1 of the present invention. [Figure 5] This is a system block diagram of an exhaust gas treatment system applying a new type of rotary disc reactor for ship exhaust gas absorption according to Embodiment 2 of the present invention. [Modes for carrying out the invention]

[0018] To further clarify the object, technical solution, and advantages of the embodiments of the present invention, the technical solution in the embodiments of the present invention will be described clearly and completely below with reference to the drawings of the embodiments, but it should be clear that the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without requiring any creative effort based on the embodiments of the present invention are all within the scope of protection of the present invention.

[0019] Example 1 As shown in Figures 1, 2, 3, 4, and 5, the new rotary disc type reactor for absorbing ship exhaust gases includes a casing 1, a hollow rotating shaft 2 provided inside the casing 1, a power unit 3 for rotating the hollow rotating shaft 2, a rotating disc 4 fitted onto the hollow rotating shaft 2, and a group of injection holes opened in the hollow rotating shaft 2. The group of injection holes includes a plurality of injection holes 5, the opening direction of which is directed toward the rotating disc 4. A baffle component is further fitted onto the hollow rotating shaft 2, and the baffle component includes a first baffle 61 and a second baffle 62, the first baffle 61 and the second baffle 62 are located on both sides of the rotating disc 4, a first reflection passage is formed between the first baffle 61 and the rotating disc 4, and a second reflection passage is formed between the second baffle 62 and the rotating disc 4. After the high-viscosity alkaline mixed absorbent liquid is ejected from the injection holes 5, it is scattered outward by centrifugal force, and the high-viscosity alkaline mixed absorbent liquid on both sides of the rotating disc 4 is blocked by the first baffle 61 and the second baffle 62, respectively. This prevents most of the high-viscosity alkaline mixed absorbent liquid from directly scattering onto the inner wall of the casing 1 and coming into contact with the rotating disc 4. The high-viscosity alkaline mixed absorbent liquid between the first baffle 61 and the rotating disc 4 will be explained as an example. After the high-viscosity alkaline mixed absorbent liquid is ejected, it is continuously reflected within the first reflection passage between the first baffle 61 and the rotating disc 4 and discharged outside the first reflection passage, and as the high-viscosity alkaline mixed absorbent liquid continues to come into contact with the rotating disc 4, the amount of scattered high-viscosity alkaline mixed absorbent liquid gradually decreases. This ensures that most of the ejected high-viscosity alkaline mixed absorbent liquid adheres to the rotating disc 4. Furthermore, the continuous reflection gradually reduces the velocity of the scattered high-viscosity alkaline mixed absorbent solution, which also promotes its adhesion to the rotating disk 4. In addition, the high-viscosity alkaline mixed absorbent solution undergoes mass transfer as the rotating disk 4 rotates at high speed, covering the entire surface of the rotating disk 4. This improves the absorption efficiency due to mass transfer of the high-viscosity alkaline mixed absorbent solution and enhances the mass transfer efficiency in the surface region of the rotating disk 4, thereby improving the reaction efficiency of the reactor.

[0020] Specifically, the reaction device may be provided in a vertical or horizontal shape as required. In this embodiment, a horizontal structure will be described as an example. The casing 1 is cylindrical in shape, made of organic glass, and it is easy to observe and record the distribution characteristics of the high-viscosity alkaline mixed absorption liquid on the surface of the rotating disk 4 and the diffusion width on the inner wall of the casing 1 during operation. Both ends of the casing 1 are fixed to the first support 91 and the second support 92 respectively, and both the first support 91 and the second support 92 are made of stainless steel. Both ends of the casing 1 are hermetically connected to the first support 91 and the second support 92 respectively by a sealing structure, and the first support 91 and the second support 92 are provided perpendicular to the base 93. The sealing structure is a prior art and will not be described in detail here.

[0021] Preferably, one end of the hollow rotating shaft 2 is connected to the power device 3, and the other end is connected to the liquid supply pipe 71. A drain pipe 72 is further provided below the casing 1, and an intake pipe 81 and an exhaust pipe 82 are further provided in the casing 1. The high-viscosity alkaline mixed absorption liquid is introduced into the hollow rotating shaft 2 through the liquid supply pipe 71, and the high-viscosity alkaline mixed absorption liquid inside the casing 1 is discharged through the drain pipe 72. The ship exhaust gas flows into the casing 1 through the intake pipe 81, and after sufficient contact with the high-viscosity alkaline mixed absorption liquid, the treated gas is discharged through the exhaust pipe 82. A flow meter 30 is connected to the intake pipe 81, and a peristaltic pump 80 is connected to the liquid supply pipe 71. In this embodiment, the diameters of the intake pipe 81, the exhaust pipe 82 and the drain pipe 72 are all 6 mm, and the diameter of the liquid supply pipe 71 is also 6 mm.

[0022] Preferably, the axes of the intake pipe 81 and the exhaust pipe 82 are provided perpendicular to each other, and the axes of the intake pipe 81 and the exhaust pipe 82 are provided perpendicular to the axis of the hollow rotating shaft 2. Thereby, the ship exhaust gas flows in from a direction parallel to the rotating disk 4, and sufficient contact with the high-viscosity alkaline mixed absorption liquid adhering to the rotating disk 4 is realized.

[0023] Specifically, the hollow rotating shaft 2 has an open end and a closed end. The open end of the hollow rotating shaft 2 passes through the first support 91 and is connected to the fluid supply pipe 71, and the closed end passes through the second support 92 and is connected to the power unit 3. Bearings are installed between both ends of the hollow rotating shaft 2 and the first support 91 and the second support 92, and a seal structure is used to create an airtight connection. The seal structure is prior art and will not be described in detail here.

[0024] Specifically, the power unit 3 can consist of a high-speed motor, which is mounted on the second support 92, and the output end of the high-speed motor is connected to the hollow rotating shaft 2 via a coupling. A tachometer is directly connected to the high-speed motor and is also connected to a controller. The controller controls the operation of the high-speed motor.

[0025] Preferably, the first baffle 61 is a conical tube with its large-diameter end facing the turntable 4, and the second baffle 62 is a conical tube with its large-diameter end facing the turntable 4. The specific angles provided for the first baffle 61 and the second baffle 62 change the reflection angle of the ejected high-viscosity alkaline mixed absorbent liquid, promoting multiple reflections of the absorbent liquid. In this embodiment, the conical angles of both the first baffle 61 and the second baffle 62 are 120°.

[0026] Preferably, the end face of the first baffle 61 facing the turntable 4 is provided parallel to the surface of the turntable 4, and the end face of the second baffle 62 facing the turntable 4 is provided parallel to the surface of the turntable 4. Taking the first baffle 61 as an example, the high-viscosity alkaline mixed absorbent liquid is reflected off the end face of the first baffle 61 facing the turntable 4, and then reflected again in the gap between the end face of the first baffle 61 facing the turntable 4 and the surface of the turntable 4. As a result, the high-viscosity alkaline mixed absorbent liquid detaches from the covering area of ​​the first baffle 61 in a wave-like pattern in the radial direction of the turntable 4, and then distributes to the end face of the turntable 4. In this embodiment, the distance between the large-diameter end face of the first baffle 61 and the surface of the turntable 4 is 2 to 10 mm, and the difference in inner and outer radii of the large-diameter end face of the first baffle 61 is 1 to 3 mm. The distance between the large-diameter end face of the second baffle 62 and the surface of the rotating disc 4 is 2 to 10 mm, and the difference in inner and outer radii of the large-diameter end face of the second baffle 62 is 1 to 3 mm.

[0027] Specifically, the ratio of the outer diameter of the large-diameter end of the first baffle 61 to the outer diameter of the rotating disc 4 is 1:10 to 1:5. In this embodiment, the rotating disc 4 has a thickness of 1 mm and a disc diameter of 100 mm.

[0028] Preferably, the rotating disc 4 divides the injection holes 5 into two, with the rotating disc 4 corresponding to the intermediate position of the injection holes 5, so that the high-viscosity alkaline mixed absorbent liquid flowing into the injection holes 5 can be injected to both sides of the rotating disc 4. When the high-viscosity alkaline mixed absorbent liquid flows into the hollow rotating shaft 2, the flow velocity creates a gradient in the axial direction of the hollow rotating shaft 2. Therefore, if injection holes 5 are opened on both sides of the rotating disc 4, the velocity difference of the absorbent liquid on both sides of the rotating disc 4 can easily become excessive. By injecting the high-viscosity alkaline mixed absorbent liquid to both sides of the rotating disc 4 through a single injection hole 5, the velocity difference of the high-viscosity alkaline mixed absorbent liquid injected from both sides of the rotating disc 4 can be reduced, promoting a uniform distribution of the high-viscosity alkaline mixed absorbent liquid to both sides of the rotating disc 4. In this embodiment, the inner bore diameter of the hollow rotating shaft 2 is 8.05 mm, and the hole diameter of the injection holes 5 is 3 mm.

[0029] Specifically, because the multiple injection holes 5 of the injection hole group are uniformly arranged in the circumferential direction around the axis of the hollow rotating shaft 2, the high-viscosity alkaline mixed absorbent liquid can be uniformly injected into the rotating disc 4 in the circumferential direction.

[0030] Preferably, multiple rotating discs 4, baffle components corresponding one-to-one to the multiple rotating discs 4, and groups of injection holes corresponding one-to-one to the multiple rotating discs 4 are provided along the axial direction of the hollow rotating shaft 2. The multiple rotating discs 4 increase the gas-liquid contact area, thereby promoting improved mass transfer efficiency. The high-viscosity alkaline mixed absorbent liquid is scattered from the edges of the rotating discs 4 and then sprayed onto the inner wall of the casing 1 to form an annular liquid film. By setting the spacing between adjacent rotating discs 4 to 10-50 mm, it is ensured that the multiple annular liquid films formed by the multiple rotating discs 4 do not overlap or have excessive spacing, and the effective gas-liquid contact area of ​​the inner wall of the casing 1 is made maximum use to achieve sufficient mixing of the ship's exhaust gas and the high-viscosity alkaline mixed absorbent liquid.

[0031] Specifically, the axes of the intake pipe 81 and the exhaust pipe 82 are located between two adjacent rotating discs 4.

[0032] Specifically, the hollow rotating shaft 2 is a stepped shaft, and the multiple rotating discs 4 are fixed to the hollow rotating shaft 2 via a first lock nut 21, a first sleeve 22, and a second sleeve 23. In this embodiment, the example of providing three rotating discs 4 will be described. The first rotating disc 4 is fitted onto the shaft head of the hollow rotating shaft 2 and brought into contact with the shaft shoulder of the hollow rotating shaft 2. Next, the first first sleeve 22 is placed over it and pressed against the first rotating disc 4. The second rotating disc 4 is fitted onto the hollow rotating shaft 2 and brought into contact with the end face of the first first sleeve 22, then the second first sleeve 22 is placed over it and pressed against the second rotating disc 4. The third rotating disc 4 is fitted onto the hollow rotating shaft 2 and brought into contact with the end face of the second first sleeve 22, then the second sleeve 23 is placed over it and pressed against the third rotating disc 4. The first lock nut 21 is screwed onto the hollow rotating shaft 2, and the first lock nut 21 presses against the second sleeve 23. This fixes the three rotating discs 4 to the hollow rotating shaft 2.

[0033] Specifically, the first baffle 61 and the second baffle 62 are fitted and fixed into the first sleeve 22, and the first baffle 61 is fitted and fixed into the second sleeve 23. A third sleeve 24 is further fitted onto the hollow rotating shaft 2, and the third sleeve 24 is positioned on the side of the shaft shoulder away from the rotating disc 4 while contacting the shaft shoulder, and the third sleeve 24 is fixed to the hollow rotating shaft 2 by a second lock nut 25. The second baffle 62 is fitted and fixed into the third sleeve. The first sleeve 22 and the first baffle 61 and the second baffle 62 on the sleeve, the second sleeve 23 and the first baffle 61 on the sleeve, and the third sleeve 24 and the second baffle 62 on the sleeve can all be integrally manufactured and molded.

[0034] Specifically, the rotating disc 4 and the hollow rotating shaft 2 can be connected with a spline coupling to restrict relative rotation. For example, splines can be provided on the hollow rotating shaft 2, external threads can be machined, and spline grooves (not shown) can be provided on the rotating disc 4, the first sleeve 22, the second sleeve 23, and the third sleeve 24. After sequentially attaching the rotating disc 4, the first sleeve 22, and the second sleeve 23, the rotating disc 4 is fixed by screwing on the first lock nut 21. Subsequently, the third sleeve 24 is attached, and then the third sleeve 24 is fixed by screwing on the second lock nut 25.

[0035] Specifically, the outer diameters of the first sleeve 22, the second sleeve 23, and the third sleeve 24 match the outer diameter of the shaft shoulder of the hollow rotating shaft 2, thereby reducing the velocity difference of the high-viscosity alkaline mixed absorbent liquid sprayed from both sides of the rotating disc 4. Multiple elongated holes are uniformly formed along the circumferential direction in each of the first sleeve 22, the second sleeve 23, and the third sleeve 24. The multiple elongated holes correspond one-to-one with the multiple injection holes 5 of the corresponding injection hole group, ensuring that the injection holes 5 can be reliably exposed after assembly is complete.

[0036] Preferably, mesh grooves 41 are provided on both sides of the rotating disk 4. The mesh grooves 41 consist of a plurality of radial grooves 411 uniformly arranged along the circumferential direction of the rotating disk 4 and a plurality of concentric annular grooves 412 arranged in the radial direction of the rotating disk 4. In other words, the plurality of radial grooves 411 are arranged in a spoke-like manner, and the plurality of concentric annular grooves 412 intersect with the radial grooves 411. The mesh grooves 41 increase the specific surface area of ​​the rotating disk 4 and extend the residence time of the high-viscosity alkaline mixed absorption liquid on the rotating disk 4, thereby improving the absorption efficiency by mass transfer in the surface region of the rotating disk 4. In this embodiment, the depth of the mesh grooves 41 is 0.1 to 0.3 mm.

[0037] Preferably, the radial grooves 411 on both sides of the turntable 4 correspond to each other, and the annular groove 412 is offset along the radial direction of the turntable 4. This ensures the rigidity of the turntable 4 and prevents excessive vibration at the edges of the turntable 4.

[0038] Preferably, a plurality of liquid separation notches 42 are provided on the edge of the rotating disk 4, the liquid separation notches 42 are located between two adjacent radial grooves 411, and the plurality of liquid separation notches 42 are distributed at uniform intervals along the edge of the rotating disk 4. When the high-viscosity alkaline mixed absorption liquid flows to the edge of the rotating disk 4, it is separated by the liquid separation notches 42 and ejected from the liquid separation notches 42 in the form of liquid threads and droplets. This generates even more liquid threads and droplets within the cavity of the casing 1, increasing the gas-liquid mixing effect within the cavity of the casing 1 and improving the absorption efficiency by mass transfer within the cavity of the casing 1.

[0039] Example 2 In this embodiment, we further disclose an exhaust gas treatment system using a new type of rotary-disc reactor for ship exhaust gas absorption as in Embodiment 1. As shown in Figures 1, 2, 3, 4, and 5, the system includes a ship exhaust gas storage device 10, a pressure reducing valve 20, a flow meter 30, exhaust gas introduction piping, a rotary-disc reactor, exhaust gas discharge piping, a drying device 40, an online exhaust gas analyzer 50, an exhaust gas absorption tank 60, an absorbent liquid storage tank 70, an absorbent liquid introduction piping, a peristaltic pump 80, an absorbent liquid discharge piping, and a controller.

[0040] The ship's exhaust gas storage device 10 is connected to the intake pipe 81 of the rotary-type reactor via an exhaust gas introduction pipe, and a pressure reducing valve 20 and a flow meter 30 are provided in the exhaust gas introduction pipe. The pressure reducing valve 20 adjusts the pressure of the ship's exhaust gas discharged from the ship's exhaust gas storage device 10, and the flow meter 30 controls the flow rate of the ship's exhaust gas introduced into the intake pipe 81. Furthermore, a solenoid valve I is provided in the exhaust gas introduction pipe, and the solenoid valve I is located between the flow meter 30 and the intake pipe 81 and is for controlling the intake.

[0041] The exhaust pipe 82 of the rotary-type reactor is connected to the exhaust gas absorption tank 60 via an exhaust gas discharge piping. The exhaust gas discharge piping is equipped with a drying device 40 and an online exhaust gas analyzer 50. After processing, the ship's exhaust gas is first dried in the drying device 40 and then introduced into the online exhaust gas analyzer 50 for real-time online detection. The detected ship's exhaust gas is then introduced into the exhaust gas absorption tank 60. The exhaust gas absorption tank 60 is filled with an alkaline mixed absorbent liquid, which performs secondary absorption on the ship's exhaust gas. Furthermore, a solenoid valve II is provided in the exhaust gas discharge piping, located between the exhaust pipe 82 and the drying device 40, and is used to control the exhaust.

[0042] The absorbent liquid storage tank 70 is connected to the liquid supply pipe 71 via an absorbent liquid introduction pipe, and a peristaltic pump 80 is provided in the absorbent liquid introduction pipe. The peristaltic pump 80 adjusts the flow rate of the high-viscosity alkaline mixed absorbent liquid. Furthermore, a solenoid valve III is provided in the absorbent liquid introduction pipe, and the solenoid valve III is located between the liquid supply pipe 71 and the peristaltic pump 80 and is for controlling the liquid supply.

[0043] The drain pipe 72 is connected to the absorbent liquid storage tank 70 via the absorbent liquid discharge pipe, and the high-viscosity alkaline mixed absorbent liquid is recovered and recycled. When the high-viscosity alkaline mixed absorbent liquid reaches absorption saturation, it is replaced. Furthermore, a solenoid valve IV is provided in the absorbent liquid introduction pipe, and the solenoid valve IV is located between the drain pipe 72 and the absorbent liquid storage tank 70 to control the drainage.

[0044] The power unit 3, flow meter 30, solenoid valve I, solenoid valve II, online exhaust gas analyzer 50, peristaltic pump 80, solenoid valve III, and solenoid valve IV are all electrically connected to the controller, which controls the power unit 3, flow meter 30, solenoid valve I, solenoid valve II, online exhaust gas analyzer 50, peristaltic pump 80, solenoid valve III, and solenoid valve IV.

[0045] Example 3 The difference between this embodiment and Embodiment 2 is that the exhaust gas treatment system includes multiple parallel-connected rotary-disk type reactors.

[0046] Each of the exhaust gas inlet pipe, exhaust gas outlet pipe, absorbent liquid inlet pipe, and absorbent liquid outlet pipe is provided with a branch pipe for connecting to each rotary-disc type reactor, and each branch pipe of the exhaust gas inlet pipe is equipped with one flow meter 30. Multiple rotary-disc type reactors are connected in parallel in the exhaust gas treatment system as needed to meet the requirements for the removal efficiency of ship exhaust gases.

[0047] Example 4 This embodiment discloses a method based on a novel rotary-disc reactor for absorbing ship exhaust gases. Exhaust gas treatment is performed using an exhaust gas treatment system with a novel rotary-disc reactor for absorbing ship exhaust gases. As shown in Figures 1, 2, 3, 4, and 5, the method includes the following steps.

[0048] In step S1, the exhaust gas treatment system is activated, the controller activates the high-speed motor of the power unit 3, and adjusts the rotational speed of the high-speed motor of the power unit 3 so that it reaches a specified rotational speed range.

[0049] In step S2, ship exhaust gas is discharged from the ship exhaust gas storage device 10, the pressure reducing valve 20 reduces the pressure of the ship exhaust gas discharged from the ship exhaust gas storage device 10, the controller controls the flow meter 30 to adjust the flow velocity of the ship exhaust gas to a specified flow velocity range, and then the ship exhaust gas is introduced into the rotary-type reactor, which is connected to the intake pipe 81 of the rotary-type reactor via the exhaust gas introduction piping, and the ship exhaust gas is introduced from the intake pipe 81. The absorbent liquid storage tank 70 discharges the high-viscosity alkaline mixed absorbent liquid by the operation of the peristaltic pump 80, the controller controls the peristaltic pump 80 to adjust the flow velocity of the high-viscosity alkaline mixed absorbent liquid to a specified range, and then introduces the high-viscosity alkaline mixed absorbent liquid into the rotary-type reactor. The absorbent liquid storage tank 70 is connected to the supply pipe 71 of the rotary-type reactor via the absorbent liquid introduction piping, and the high-viscosity alkaline mixed absorbent liquid is introduced into the hollow rotating shaft 2 via the supply pipe 71. The highly viscous alkaline mixed absorbent liquid that flows into the hollow rotating shaft 2 is ejected from the injection holes 5 by centrifugal force. The highly viscous alkaline mixed absorbent liquid on both sides of the rotating disk 4 is reflected multiple times in the first and second reflection passages, respectively, and the highly viscous alkaline mixed absorbent liquid is sprayed onto both sides of the rotating disk 4 by the action of the first baffle 61 and the second baffle 62, forming a liquid film. The centrifugal force generated by the high-speed rotation of the rotating disk 4 moves the highly viscous alkaline mixed absorbent liquid to the edge of the rotating disk 4, where it is separated by the liquid separation notch 42 and scattered from the edge of the rotating disk 4 in the form of liquid threads and droplets, colliding with the inner wall surface of the casing 1 and forming a liquid film. The liquid film on the rotating disk 4, the liquid threads and droplets in the casing 1, and the liquid film on the inner wall surface of the casing 1 come into sufficient contact with the ship's exhaust gas, and an absorption reaction by mass transfer proceeds, resulting in treated exhaust gas and waste liquid.

[0050] In step S3, the treated ship exhaust gas is discharged from the rotary reactor and transferred to the dryer 40. After moisture is removed from the treated exhaust gas in the dryer 40, it is transferred to the online exhaust gas analyzer 50. The controller controls the online exhaust gas analyzer 50 to detect the concentration of each component in the treated exhaust gas online in real time. The detected treated ship exhaust gas is introduced into the exhaust gas absorption tank 60. The exhaust pipe 82 of the rotary reactor is connected to the exhaust gas absorption tank 60 via the exhaust gas discharge piping. The treated ship exhaust gas is discharged from the exhaust pipe 82. Trace amounts of polluting gas components may remain in the treated ship exhaust gas, and the exhaust gas absorption tank 60, filled with an alkaline mixed absorbent, further absorbs the treated ship exhaust gas, thereby preventing secondary pollution. The online exhaust gas analyzer 50 transmits the analysis results to the controller, which outputs control commands to control the power unit 3, flow meter 30, online exhaust gas analyzer 50, and peristaltic pump 80.

[0051] In step S4, the high-viscosity alkaline mixed absorbent liquid in the rotary-type reactor is in a state of dynamic flow. The waste liquid absorbed by the high-viscosity alkaline mixed absorbent liquid from the ship flows to the bottom of the rotary-type reactor and is discharged into the absorbent liquid storage tank 70. The drain pipe 72 of the rotary-type reactor is connected to the absorbent liquid storage tank 70 via an absorbent liquid discharge pipe, and the treated high-viscosity alkaline mixed absorbent liquid is discharged from the drain pipe 72 into the absorbent liquid storage tank 70. This allows for the circulation and reuse of the high-viscosity alkaline mixed absorbent liquid, maximizing its absorption capacity. The processing effect of the rotary-type reactor can be derived from the component detection data in the treated ship's exhaust gas obtained by the online exhaust gas analyzer 50. This allows for the acquisition of the absorption saturation of the high-viscosity alkaline mixed absorbent liquid, and if the high-viscosity alkaline mixed absorbent liquid has substantially lost its absorption capacity, it is replaced by re-preparation.

[0052] In step S5, steps S1 through S4 are performed cyclically until the ship's exhaust gas treatment is complete.

[0053] Preferably, the rotational speed range of the high-speed motor of the power unit 3 is 500 to 5000 r / min, the flow velocity range of the ship's exhaust gas is 1 to 10 L / min, and the flow velocity range of the high-viscosity alkaline mixed absorbent liquid is 1 to 20 L / min. By controlling the flow velocity of the ship's exhaust gas and the flow velocity of the high-viscosity alkaline mixed absorbent liquid in the rotary-disk reactor, it is ensured that the gas-liquid ratio in the rotary-disk reactor is within an appropriate range. This improves the absorption effect of the ship's exhaust gas.

[0054] Preferably, the high-viscosity alkaline mixed absorbent solution is prepared with seawater, NaOH, and C3H8O3, with a molar concentration range of 0.5 to 2 mol of NaOH and a mass fraction range of 5% to 15% of C3H8O3. This ensures that the high-viscosity alkaline mixed absorbent solution efficiently absorbs ship exhaust gases.

[0055] Preferably, CO2 and SO2 in the ship's exhaust gas. x and NO x The volume percentage concentration ranges are 3% to 10%, 100 to 2000 ppm, and 200 to 1500 ppm, respectively. The main components of ship exhaust gas are CO2 and SO2. x and NO x Although it includes these components, the volume percentage concentration of exhaust gas components differs depending on the type of marine diesel engine and the type of fuel oil used. Therefore, this method is suitable for CO2 at 3% to 10%, SO2 at 1% to 10%. x NO is 100-2000 ppm. x It exhibits particularly excellent effects in the treatment of ship exhaust gases with a volume percentage concentration range of 200 to 1500 ppm.

[0056] The last point to be explained is as follows: The above embodiments are merely for illustrating, and not limiting, the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand the following: It is still possible to modify the technical solutions described in the above embodiments, or to substitute some or all of the technical features thereof, and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of each embodiment of the present invention. [Explanation of symbols]

[0057] 1. Casing; 2. Hollow rotating shaft; 21. First lock nut; 22. First sleeve; 23. Second sleeve; 24. Third sleeve; 25. Second lock nut; 3. Power unit; 4. Turntable; 41. Mesh grooves; 411. Radial grooves; 412. Annular grooves; 42. Liquid separation notch; 5. Injection nozzle; 61. First baffle; 62. Second baffle; 71. Supply pipe; 72. Drain pipe; 81. Intake pipe; 82. Exhaust pipe; 91. First support; 92. Second support; 93. Base; 10. Ship exhaust gas storage equipment; 20. Pressure reducing valve; 30. Flow meter; 40. Drying equipment; 50. Online exhaust gas analyzer; 60. Exhaust gas absorption tank; 70. Absorbent liquid storage tank; 80. Peristaltic pump

Claims

1. The device includes a casing (1), a hollow rotating shaft (2) provided within the casing (1), a power unit (3) for rotating the hollow rotating shaft (2), a rotating disc (4) fitted onto the hollow rotating shaft (2), and a group of injection holes opened in the hollow rotating shaft (2), The aforementioned group of injection holes includes a plurality of injection holes (5), and the opening direction of the injection holes (5) is provided toward the rotating disk (4), in a new type of rotary disk reaction apparatus for absorbing exhaust gas from ships. A new type of rotary disc reactor for absorbing exhaust gas from ships is characterized in that a baffle component is further fitted onto the hollow rotating shaft (2), the baffle component includes a first baffle (61) and a second baffle (62), the first baffle (61) and the second baffle (62) are located on both sides of the rotating disc (4), a first reflection passage is formed between the first baffle (61) and the rotating disc (4), and a second reflection passage is formed between the second baffle (62) and the rotating disc (4).

2. The novel rotary disc type reactor for absorbing ship exhaust gas according to claim 1, characterized in that the first baffle (61) is a conical tube and the large-diameter end of the first baffle (61) faces the rotary disc (4), and the second baffle (62) is a conical tube and the large-diameter end of the second baffle (62) faces the rotary disc (4).

3. The novel rotary disc type reactor for absorbing ship exhaust gas according to claim 2, characterized in that the end face of the first baffle (61) facing the rotary disc (4) is provided parallel to the surface of the rotary disc (4), and the end face of the second baffle (62) facing the rotary disc (4) is provided parallel to the surface of the rotary disc (4).

4. The rotary disk (4) is characterized in that it divides the injection hole (5) into two parts, a new type of rotary disk reaction apparatus for absorbing ship exhaust gas according to claim 1.

5. A novel rotary disc type reaction apparatus for absorbing ship exhaust gas according to claim 1, characterized in that a plurality of rotary discs (4), a baffle component corresponding one-to-one with the plurality of rotary discs (4), and a group of injection holes corresponding one-to-one with the plurality of rotary discs (4) are provided along the axial direction of the hollow rotating shaft (2), and the spacing between adjacent rotary discs (4) is 10 mm to 50 mm.

6. A new type of rotary disc reactor for absorbing ship exhaust gas, as described in claim 1, characterized in that a mesh groove (41) is provided on both sides of the rotary disc (4), and the mesh groove (41) is composed of a plurality of radial grooves (411) uniformly provided along the circumferential direction of the rotary disc (4) and a plurality of concentric annular grooves (412) provided along the radial direction of the rotary disc (4).

7. The new rotary disc type reaction apparatus for absorbing ship exhaust gas according to claim 6, characterized in that the radial grooves (411) on both sides of the rotary disc (4) are provided symmetrically, and the annular groove (412) is provided offset along the radial direction of the rotary disc (4).

8. A novel rotary disc type reaction apparatus for absorbing ship exhaust gas according to claim 6, characterized in that a plurality of liquid separation notches (42) are provided on the edge of the rotary disc (4), and the liquid separation notches (42) are located between two adjacent radial grooves (411).

9. The hollow rotating shaft (2) is connected at one end to the power unit (3) and at the other end to the liquid supply pipe (71), a drain pipe (72) is further provided below the casing (1), and an intake pipe (81) and an exhaust pipe (82) are further provided in the casing (1), characterized in that a new type of rotary disc reactor for absorbing ship exhaust gas is provided according to claim 1.

10. The novel rotary disc type reaction apparatus for absorbing ship exhaust gas according to claim 9, characterized in that the axes of the intake pipe (81) and the exhaust pipe (82) are provided perpendicular to each other, and the axes of the intake pipe (81) and the exhaust pipe (82) are provided perpendicular to the axis of the hollow rotating shaft (2).

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