Ultraviolet catalytic suspension reactor

Abstract

The utility model relates to the technical field of manufacturing of photocatalytic reactors, and discloses an ultraviolet catalytic suspension reactor which comprises a reactor main body with a reaction chamber and an upper cover hermetically connected to the upper end of the reactor main body to seal the reaction chamber, the bottom of the reactor main body is provided with an aqueous solution introduction port and a gas introduction assembly which are respectively communicated to the reaction chamber; the glass tube penetrates through the upper cover in a sealing manner and extends into the reaction chamber, an elastic supporting unit is arranged at the lower end of the glass tube, and the glass tube is supported at the bottom of the reaction chamber through the elastic supporting unit; and the ultraviolet lamp tube is mounted in the glass tube and at least partially extends to the part, positioned in the reaction chamber, of the glass tube, so that ultraviolet light can be radiated into the reaction chamber through the glass tube. According to the technical scheme, the elastic supporting unit is supported between the lower end of the glass tube and the bottom of the reaction chamber, so that the glass tube is buffered and protected, and the glass tube is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of photocatalytic reactor manufacturing, in particular to an ultraviolet catalytic suspension reactor. Background Art

[0002] At present, photocatalytic reactors generally require that an ultraviolet light source be immersed in an aqueous solution containing a catalyst, and gas needs to be introduced into the aqueous solution to promote full contact between the catalyst and the pollutants in the aqueous solution. At the same time, the aqueous solution can also be fully irradiated by ultraviolet light to achieve catalytic degradation of the pollutants in the aqueous solution.

[0003] Existing photocatalytic reactors usually use semi-open or closed containers and are equipped with exhaust measures, but the containers are atmospheric pressure containers and need to be disassembled frequently. The seals will not be sealed tightly after working for a long time, causing internal harmful gases to overflow. In addition, in order to facilitate the observation of the fluidization effect of the catalyst, the reactors are mostly made of transparent flexible materials and equipped with sunshades, but the use of transparent flexible materials may cause ultraviolet light to be emitted. If the reactor is made of rigid materials, the loss rate of the ultraviolet glass tube will be relatively high, and the catalyst at the bottom of the reactor needs to be replaced regularly. Reactors made of rigid materials also have disadvantages such as inconvenience in rapid loading and unloading of agents and the degree of unloading completion, and incomplete unloading. Utility Model Content

[0004] The utility model aims to overcome the problem of high loss rate of glass tubes in the prior art and to provide an ultraviolet catalytic suspension reactor, which can reduce the loss rate of glass tubes.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an ultraviolet catalytic suspension reactor on one hand, comprising: a reactor body formed with a reaction chamber and an upper cover sealedly connected to the upper end of the reactor body to close the reaction chamber, the bottom of the reactor body is provided with an aqueous solution inlet port and a gas inlet assembly respectively connected to the reaction chamber; a glass tube, the glass tube sealably passes through the upper cover and extends into the reaction chamber, and the lower end of the glass tube is provided with an elastic support unit to be supported at the bottom of the reaction chamber by the elastic support unit; and an ultraviolet lamp tube, the ultraviolet lamp tube is installed in the glass tube and at least partially extends to the part of the glass tube located in the reaction chamber, so as to be able to radiate ultraviolet light into the reaction chamber through the glass tube.

[0006] Optionally, the upper cover is formed with a catalyst adding port for adding catalyst into the reaction chamber and / or an exhaust port for exhausting gas in the reaction chamber.

[0007] Optionally, the upper cover is formed with a plurality of glass tube installation openings distributed along the circumferential direction, and the plurality of glass tubes respectively pass through the corresponding glass tube installation openings and extend into the reaction chamber.

[0008] Optionally, a locking nut is connected to the glass tube mounting port, and a sealing member is provided in the radial gap between the glass tube and the glass tube mounting port, and the locking nut is connected to squeeze the sealing member by penetrating a sealing sleeve into the radial gap between the glass tube and the glass tube mounting port.

[0009] Optionally, the upper cover is provided with a glass tube positioning piece extending vertically from the glass tube installation opening into the reaction chamber, and the outer peripheral wall of the glass tube is in contact with the inner peripheral wall of the glass tube positioning piece.

[0010] Optionally, a glass observation window for observing the fluidization of the catalyst in the reaction chamber is provided in the middle of the reactor body.

[0011] Optionally, a reactor base is installed at the bottom of the reaction chamber, and the reactor base includes a top plate assembly, a base flange and a bottom plate arranged in sequence from top to bottom. The elastic support unit is supported on the top plate assembly, and the base flange is sealed and connected to the lower end of the reactor body.

[0012] Optionally, the elastic support unit includes a buffer sleeve sleeved on the lower end of the glass tube and a spring whose two ends are respectively connected to a side of the buffer sleeve away from the glass tube and an end surface of the top plate assembly.

[0013] Optionally, a catalyst discharge port is provided on the reactor body near the top plate assembly and above the top plate assembly, and / or the aqueous solution inlet port is provided on the portion of the reactor body located between the top plate assembly and the base flange of the reactor base.

[0014] Optionally, the gas inlet assembly includes an aeration head, an aeration head connecting port and an injection pipe, the input end of the injection pipe forms a gas injection port, the injection pipe passes through the base flange and extends into the aeration head connecting port installed on the top plate assembly, the air inlet of the aeration head is connected to the air outlet end of the aeration head connecting port located above the top plate assembly.

[0015] Through the above technical solution, an elastic support unit is used to support between the lower end of the glass tube and the bottom of the reaction chamber, thereby providing a buffer and protection for the glass tube, preventing the lower end of the glass tube from directly and rigidly contacting the bottom of the reaction chamber, which would cause the glass tube to be easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a structural schematic diagram of an ultraviolet catalytic suspension reactor provided by an embodiment of the utility model;

[0017] Figure 2 It is a top view of the ultraviolet catalytic suspension reactor provided by an embodiment of the utility model;

[0018] Figure 3 Schematic diagram of the sealing structure of the upper end of the glass tube in the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the connection structure of the lower end of the glass tube in the embodiment of the utility model.

[0020] Description of Reference Numerals

[0021] 1-locking nut; 2-sealing sleeve; 3-first sealing gasket; 4-sealing member; 5-upper cover; 6-second sealing gasket; 7-reactor body; 8-aeration head; 9-reactor base; 10-third sealing gasket; 11-flange blind plug; 12-glass tube; 13-ultraviolet lamp tube; 14-elastic support unit; 15-glass tube positioning member; 16-spring; 17-glass observation window; 18-reaction chamber; 19-buffer sleeve; 20-first sieve plate; 21-second sieve plate; 22-gas inlet assembly; N1- Catalyst adding port; N2-exhaust port; N3-first glass tube installation port; N4-second glass tube installation port; N5-third glass tube installation port; N6-fourth glass tube installation port; N7-fifth glass tube installation port; N8-sixth glass tube installation port; N9-seventh glass tube installation port; N10-eighth glass tube installation port; N11-first liquid discharge port; N12-catalyst discharge port; N13-aqueous solution inlet port; N14-second liquid discharge port; N15-gas injection port; N16-aeration head connection port. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0023] In the present utility model, unless otherwise specified, the directions or positional relationships indicated by terms such as "up, down, left, right, inside, outside, top, bottom" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The ultraviolet catalytic suspension reactor according to the present utility model is described below with reference to the accompanying drawings.

[0027] Reference Figure 1As shown, a preferred embodiment of the utility model of an ultraviolet catalytic suspension reactor comprises: a reactor body 7 and an upper cover 5, a reaction chamber 18 is formed in the reactor body, and the upper cover 5 is sealed and connected to the upper end of the reactor body 7 to close the reaction chamber 18. In order to improve the sealing effect between the upper cover 5 and the upper end of the reactor body 7, a second sealing gasket 6 can be arranged between the upper cover 5 and the upper end of the reactor body 7. The bottom of the reactor body 7 is provided with a water solution inlet port N13 and a gas inlet assembly 22 respectively connected to the reaction chamber 18, so that the water solution enters the reaction chamber 18 through the water solution inlet port N13, and the gas enters the reaction chamber 18 through the gas inlet assembly 22. The lower end of the reactor body 7 can be a closed structure, for example, the lower end of the reactor body 7 is sealed by a flange, or, in the preferred embodiment shown in the figure, the ultraviolet catalytic suspension reactor also includes a reactor base 9, which at least partially extends to the bottom of the reaction chamber 18 and closes the lower end of the reactor body 7. In addition, according to a preferred embodiment of the utility model, the ultraviolet catalytic suspension reactor further includes a glass tube 12 and an ultraviolet lamp tube 13, wherein a glass tube installation opening is provided on the upper cover 5, the glass tube 12 passes through the glass tube installation opening and extends into the reaction chamber 18, the glass tube 12 is sealed and installed with the glass tube installation opening, and the ultraviolet lamp tube 13 is installed in the glass tube 12 and at least partially extends to the part of the glass tube 12 located in the reaction chamber 18, so that the ultraviolet light emitted by the ultraviolet lamp tube 13 can be radiated into the reaction chamber 18 through the glass tube 12. In addition, in the preferred embodiment shown in the figure, in order to prevent the lower end of the glass tube 12 from directly and rigidly contacting the bottom of the reaction chamber 18, the ultraviolet catalytic suspension reactor further includes an elastic support unit 14 provided at the lower end of the glass tube 12, that is, the lower end of the glass tube 12 is supported on the bottom of the reaction chamber 18 by the elastic support unit 14.

[0028] Existing ultraviolet catalytic reactors are mostly made of transparent or translucent flexible materials, which causes the ultraviolet light emitted by the ultraviolet lamp to pass through the reactor, reducing the utilization rate of ultraviolet light. The ultraviolet catalytic suspension reactor of the utility model mainly adopts opaque rigid materials, and the glass tube 12 directly contacts the rigid component at the lower end of the reactor body 7, which easily causes damage to the glass tube 12. Therefore, by arranging an elastic support unit 14 at the lower end of the glass tube 12, the elastic support unit 14 can play a role of buffering and protecting the glass tube 12, thereby reducing the risk of damage to the glass tube 12.

[0029] Reference Figure 1 and Figure 2The upper cover 5 is formed with a catalyst adding port N1 for adding catalyst into the reaction chamber 18 and an exhaust port N2 for exhausting gas in the reaction chamber 18. Of course, the utility model is not limited thereto, for example, the catalyst adding port N1 and / or the exhaust port N2 can be arranged at the upper part of the reactor body 7, as long as it is kept above the highest liquid level in the reaction chamber 18.

[0030] In addition, a first liquid discharge port N11 is provided at a position of the reactor body 7 below and close to the highest liquid level line to discharge the solution in the reaction chamber 18 after the reaction is completed. Of course, the first liquid discharge port N11 can also be provided at other positions of the reactor body 7, and it is necessary to ensure that the first liquid discharge port N11 is not higher than the highest liquid level line. Figure 1 As shown, in order to prevent the catalyst from being discharged along with the solution through the first liquid discharge port N11, a first sieve plate 20 is provided at the liquid inlet position of the first liquid discharge port N11, and a plurality of holes are formed on the first sieve plate 20, the diameter of the holes being smaller than the diameter of the catalyst particles, thereby preventing the catalyst particles from being discharged along with the solution through the first liquid discharge port N11.

[0031] Optional, see Figure 2 As shown, the upper cover 5 is formed with a plurality of glass tube installation ports distributed along the circumferential direction, and a plurality of glass tubes 12 extend into the reaction chamber 18 through the corresponding glass tube installation ports, for example, the upper cover 5 is formed with 8 glass tube installation ports, namely, the first glass tube installation port N3, the second glass tube installation port N4, the third glass tube installation port N5, the fourth glass tube installation port N6, the fifth glass tube installation port N7, the sixth glass tube installation port N8, the seventh glass tube installation port N9 and the eighth glass tube installation port N10, and the 8 glass tube installation ports are evenly distributed along the circumference of the circle with the center of the upper cover 5 as a circle. The catalyst adding port N1 and / or the exhaust port N2 can be arranged inside the circle, or, in a preferred embodiment of the utility model, the catalyst adding port N1 and / or the exhaust port N2 are arranged outside the circle.

[0032] Reference Figure 1 and Figure 3As shown, in the ultraviolet catalytic suspension reactor of the utility model, a locking nut 1 is connected to the glass tube mounting port, and a sealing member 4 is provided in the radial gap between the glass tube 12 and the glass tube mounting port, and the locking nut 1 is connected to squeeze the sealing member 4 by penetrating the sealing sleeve 2 in the radial gap between the glass tube 12 and the glass tube mounting port. The sealing member 4 can be an O-ring, a U-shaped sealing ring or a flat sealing ring. Since the sealing member 4 is elastic, when the locking nut 1 is tightened, the sealing sleeve 2 moves axially toward the sealing member 4 and squeezes the sealing member 4, and the sealing member 4 expands radially, thereby sealing the gap between the glass tube mounting port and the glass tube. In order to improve the sealing effect, the ultraviolet catalytic suspension reactor of the utility model also includes a first sealing gasket 3 arranged between the sealing sleeve 2 and the sealing member 4. In addition, the first sealing gasket 3 and the sealing member 4 form a sealing assembly, and the number of the sealing assembly can be multiple, for example, combined with Figure 1 and Figure 3 As shown, the number of the sealing assemblies is two, thereby further improving the sealing effect of the sealing assemblies.

[0033] Continue to refer to Figure 1 and Figure 3 As shown, the upper cover 5 is provided with a glass tube positioning member 15 extending vertically from the glass tube installation port into the reaction chamber 18, and the outer peripheral wall of the glass tube 12 is fitted with the inner peripheral wall of the glass tube positioning member 15, so that the glass tube 12 can be kept in a vertical state to prevent the glass tube 12 from shaking during the reaction process and causing damage to the glass tube 12.

[0034] Optionally, a glass observation window 17 for observing the fluidization of the catalyst in the reaction chamber 18 is provided in the middle of the reactor body 7, for example, Figure 1 As shown, two glass observation windows 17 are provided in the middle of the reactor body 7 for observing the fluidization of the catalyst in the reaction chamber 18 .

[0035] As mentioned above, combined with Figure 1As shown, a reactor base 9 is installed at the bottom of the reaction chamber 18, and the reactor base 9 includes a top plate assembly, a base flange and a bottom plate arranged in sequence from top to bottom, and an elastic support unit 14 is supported on the top plate assembly, and the base flange is sealed and connected to the lower end of the reactor body 7. In order to improve the sealing performance of the sealed connection between the base flange and the lower end of the reactor body 7, a third sealing gasket 10 is also arranged between the base flange and the lower end of the reactor body 7. According to a preferred embodiment of the utility model, the top plate assembly is connected to the base flange through a plurality of sieve plate support rollers, and the base flange is connected to the bottom plate through a skirt seat. The top plate assembly includes a second sieve plate 21 supported on a plurality of sieve plate support rollers and a welding wire mesh laid on the second sieve plate 21, wherein a plurality of holes are formed on the second sieve plate 21 and the welding wire mesh, and the diameter of the holes is smaller than the diameter of the catalyst particles, so that the catalyst in the reaction chamber 18 can be collected by the welding wire mesh.

[0036] Furthermore, combined with Figure 1 and Figure 4 As shown, the elastic support unit 14 includes a buffer sleeve 19 sleeved on the lower end of the glass tube 12 and a spring 16 whose two ends are respectively connected to the side of the buffer sleeve 19 away from the glass tube 12 and the end surface of the top plate assembly. Specifically, the buffer sleeve 19 is made of elastic material, such as rubber or polytetrafluoroethylene (PTFE), the outer wall of the lower end of the glass tube 12 is fitted with the inner wall of the buffer sleeve 19 to fix the lower end of the glass tube 12, one end of the spring 16 is connected to the side of the buffer sleeve 19 away from the glass tube 12, and the other end is connected to the welding wire mesh, wherein one end of the spring 16 is heated to melt into the side of the buffer sleeve 19 away from the glass tube 12 and form a whole with the buffer sleeve 19, and the other end of the spring 16 is welded and connected to the welding wire mesh. The utility model is not limited to this, for example, the elastic support unit 14 may only include the buffer sleeve 19, which is sleeved on the lower end of the glass tube 12 and supported on the welding wire mesh, and the buffer sleeve 19 can produce elastic deformation, thereby playing the role of buffering and protecting the glass tube 12.

[0037] Optional, see Figure 1As shown, a catalyst discharge port N12 is provided near the top plate assembly and above the top plate assembly of the reactor body 7, and a flange blind plug 11 is provided at the output end of the catalyst discharge port N12. When the reaction in the reaction chamber 18 is completed, the flange blind plug 11 is opened so that the catalyst collected on the welding wire mesh can be discharged through the catalyst discharge port N12. In the preferred embodiment shown in the figure, the aqueous solution inlet port N13 is provided at the portion of the reactor body 7 located between the top plate assembly and the base flange of the reactor base 9, that is, the aqueous solution inlet port N13 is provided at the position of the reactor body 7 corresponding to the sieve plate support roller, thereby, the aqueous solution injected from the aqueous solution inlet port N13 passes through the uniform distribution effect of the second sieve plate 21 and the welding wire mesh, so that the aqueous solution entering the reaction chamber 18 is more evenly distributed. According to the preferred embodiment of the utility model, before the reaction starts, the plug of the catalyst adding port N1 is opened, and the catalyst is added from the catalyst adding port N1 by a funnel. After the catalyst is added, the plug is installed on the catalyst adding port N1. After the reaction is finished, the flange blind plug 11 is opened, and the aqueous solution is injected from the aqueous solution inlet port N13, and the catalyst on the top plate assembly is discharged from the catalyst discharge port N12. Therefore, the ultraviolet catalytic suspension reactor of the utility model is convenient for loading and unloading the catalyst, and the catalyst can be loaded and unloaded only by using the catalyst adding port N1 and the catalyst discharge port N12 without disassembling the reactor structure.

[0038] Reference Figure 1 As shown, the gas introduction component 22 includes an aeration head 8, an aeration head connection port N16 and an injection pipe, the input end of the injection pipe forms an injection port N15, the injection pipe passes through the base flange and extends to the aeration head connection port N16 installed on the top plate assembly, and the air inlet of the aeration head 8 is connected to the air outlet end of the aeration head connection port N16 located above the top plate assembly. Thus, the gas is injected from the injection port N15, injected into the aeration head 8 through the injection pipe, and finally discharged from the multiple outlets on the aeration head 8, so that the gas entering the reaction chamber 18 is more evenly distributed, thereby improving the fluidization effect of the catalyst.

[0039] Optional, combined Figure 1 As shown, the skirt of the reactor base 9 may be provided with an air injection pipe installation port and a liquid discharge pipe installation port. After the air injection pipe passes through the air injection pipe installation port and enters the skirt, it extends upward through the base flange and enters the aeration head connection port 16 to communicate with the aeration head 8. The ultraviolet catalytic suspension reactor of the utility model also includes a liquid discharge pipe, the liquid inlet of the liquid discharge pipe is arranged on the base flange, one end of the liquid discharge pipe is sealedly connected to the liquid inlet, and the other end passes through the liquid discharge pipe installation port on the skirt to form a second liquid discharge port N14 to discharge the reaction residual solution in the reaction chamber 18.

[0040] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An ultraviolet catalytic suspension reactor, characterized in that: include: A reactor body (7) formed with a reaction chamber (18) and an upper cover (5) sealedly connected to the upper end of the reactor body (7) to close the reaction chamber (18), wherein the bottom of the reactor body (7) is provided with an aqueous solution inlet port (N13) and a gas inlet assembly (22) respectively connected to the reaction chamber (18); a glass tube (12), the glass tube (12) passing through the upper cover (5) in a sealed manner and extending into the reaction chamber (18), and an elastic support unit (14) is provided at the lower end of the glass tube (12) so as to be supported on the bottom of the reaction chamber (18) by the elastic support unit (14); and An ultraviolet light tube (13) is installed in the glass tube (12) and at least partially extends to the portion of the glass tube (12) located in the reaction chamber (18), so as to be able to radiate ultraviolet light into the reaction chamber (18) through the glass tube (12).

2. The ultraviolet catalytic suspension reactor according to claim 1, characterized in that: The upper cover (5) is formed with a catalyst adding port (N1) for adding a catalyst into the reaction chamber (18) and / or an exhaust port (N2) for exhausting gas in the reaction chamber (18).

3. The ultraviolet catalytic suspension reactor according to claim 1, characterized in that: The upper cover (5) is formed with a plurality of glass tube installation openings distributed along the circumferential direction, and the plurality of glass tubes (12) respectively pass through the corresponding glass tube installation openings and extend into the reaction chamber (18).

4. The ultraviolet catalytic suspension reactor according to claim 3, characterized in that: A locking nut (1) is connected to the glass tube installation opening, and a sealing member (4) is provided in the radial gap between the glass tube (12) and the glass tube installation opening. The locking nut (1) is connected to squeeze the sealing member (4) by penetrating a sealing sleeve (2) in the radial gap between the glass tube (12) and the glass tube installation opening.

5. The ultraviolet catalytic suspension reactor according to claim 3, characterized in that: The upper cover (5) is provided with a glass tube positioning piece (15) extending vertically from the glass tube installation opening into the reaction chamber (18), and the outer peripheral wall of the glass tube (12) is in contact with the inner peripheral wall of the glass tube positioning piece (15).

6. The ultraviolet catalytic suspension reactor according to claim 1, characterized in that: A glass observation window (17) for observing the fluidization of the catalyst in the reaction chamber (18) is provided in the middle of the reactor body (7).

7. The ultraviolet catalytic suspension reactor according to claim 1, characterized in that: A reactor base (9) is installed at the bottom of the reaction chamber (18), and the reactor base (9) includes a top plate assembly, a base flange and a bottom plate arranged in sequence from top to bottom. The elastic support unit (14) is supported on the top plate assembly, and the base flange is sealed and connected to the lower end of the reactor body (7).

8. The ultraviolet catalytic suspension reactor according to claim 7, characterized in that: The elastic support unit (14) comprises a buffer sleeve (19) sleeved on the lower end of the glass tube (12) and a spring (16) having two ends respectively connected to a side of the buffer sleeve (19) away from the glass tube (12) and an end surface of the top plate assembly.

9. The ultraviolet catalytic suspension reactor according to claim 7, characterized in that: The reactor body (7) is provided with a catalyst discharge port (N12) near the top plate assembly and above the top plate assembly, and / or the aqueous solution inlet port (N13) is provided in the portion of the reactor body (7) located between the top plate assembly and the base flange of the reactor base (9).

10. The ultraviolet catalytic suspension reactor according to claim 7, characterized in that: The gas introduction component (22) comprises an aeration head (8), an aeration head connection port (N16) and an injection pipe, wherein the input end of the injection pipe forms an injection port (N15), the injection pipe passes through the base flange and extends into the aeration head connection port (N16) mounted on the top plate component, and the air inlet of the aeration head (8) is connected to the air outlet end of the aeration head connection port (N16) located above the top plate component.

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