A flue gas distributor for a rotary spray deacidification reaction tower

Abstract

The present invention proposes a flue gas distributor for a rotary spray deacidification reaction tower, comprising a flue shell, a guide plate assembly mounting flange, an atomizer support tube, a guide plate assembly, a corner guide plate, an outlet shell, a rotary atomizer and an atomizing wheel. The flue shell has a horizontal flue section and a vertical flue section. The guide plate assembly is mounted on the guide plate assembly mounting flange on the vertical flue section. The guide plate assembly has a plurality of first guide channels. A second guide channel is formed inside the corner guide plate. The horizontal flue section is connected to the inner cavity of the outlet shell through the first guide channel and the second guide channel. A double-layer cyclone assembly is installed in the outlet shell. The atomizer support tube is installed in the vertical flue section, and its lower end extends into the center of the double-layer cyclone assembly, and is installed with a rotary atomizer and an atomizing wheel. The flue gas distributor is easy to disassemble and overhaul, and the cross-section of the airflow channel is adjustable to adapt to changes in different flue gas volumes.

Description

[Technical field]

[0001] The invention relates to the technical field of semi-dry deacidification of flue gas from domestic waste incineration, in particular to a flue gas distributor of a rotary spray deacidification reaction tower. [Background technology]

[0002] Domestic waste incineration power plants need to purify and remove various pollutants in the flue gas before they meet emission standards. At present, the mainstream flue gas deacidification treatment method is the rotary spray semi-dry method, which mainly uses a high-speed rotating centrifugal atomizer to spray the deacidification agent into the deacidification reaction tower, and fully mixes, contacts and reacts with the flue gas entering the reaction tower in a swirl to achieve the maximum removal efficiency. Before the flue gas enters the reaction tower, it needs to be evenly distributed and guided to form a swirling airflow. The flue gas distributor arranged on the top of the reaction tower is an important device for sending the flue gas into the reaction tower in a uniform swirl so that the flue gas and the deacidification agent are fully mixed. Most of the existing reaction towers use a volute-shaped flue gas distributor, which has a complex structure, large volume, heavy weight, and is difficult to maintain or replace after the internal components are worn. In addition, the airflow channel of the existing distributor is fixed, and the cross-section of the airflow channel is fixed after installation, and the adaptability to changes in flue gas volume is relatively narrow. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a flue gas distributor for a rotary spray deacidification reaction tower, which is easy to disassemble and repair, and has an adjustable cross-section of the airflow channel to adapt to changes in different flue gas volumes.

[0004] To achieve the above-mentioned purpose, the present invention proposes a flue gas distributor for a rotary spray deacidification reaction tower, which is arranged at the top of the deacidification reaction tower, and includes a flue shell, a guide plate assembly mounting flange, an atomizer support pipe, a guide plate assembly, a corner guide plate, an outlet shell, a rotary atomizer and an atomizing wheel. The flue shell has a horizontal flue section and a vertical flue section. The top of the vertical flue section is provided with a guide plate assembly mounting flange, the guide plate assembly is detachably mounted on the guide plate assembly mounting flange, and a height-adjustable atomizer support pipe is also installed in the vertical flue section. The guide plate assembly and the guide plate assembly mounting flange are provided with a central slot for the atomizer support pipe to pass through, and the guide plate assembly has a plurality of first guide channels. A plurality of corner guide plates are installed in the vertical flue section, and a second guide channel is formed inside the vertical flue section. An outlet shell is installed at the outlet of the vertical flue section. The horizontal flue section is connected with the inner cavity of the outlet shell through the first guide channel and the second guide channel. A double-layer swirl assembly is installed in the outlet shell. The lower end of the atomizer support tube extends into the center of the double-layer swirl assembly, and a rotary atomizer and an atomizing wheel are installed. The double-layer swirl assembly includes an outer swirl assembly and an inner swirl assembly. The inner swirl assembly is detachably connected to the outer swirl assembly through a plurality of connecting plates. The double-layer swirl assembly forms an inner and outer airflow channel that converges to the center of the deacidification reaction tower between the outlet shell and the outer wall of the atomizer support tube.

[0005] Preferably, the outer swirl assembly and the inner swirl assembly are respectively provided with a plurality of circumferentially evenly distributed swirl blades, and holes are opened on the swirl blades on the outer swirl assembly and / or the inner swirl assembly, and are connected and fixed in series through circular ring connectors.

[0006] Preferably, the connecting plate is fixed on the inner side of the outer swirl assembly, and a plurality of first adjustment bolt holes for fixing the inner swirl assembly are provided on the connecting plate along the height direction, so that the relative heights of the outer swirl assembly and the inner swirl assembly can be adjusted.

[0007] Preferably, the double-layer cyclone assembly also includes an outlet inner cone shell welded to the lower part of the inner cyclone assembly, the bottom of the outlet shell has a first lower cone shell, the outer side of the inner cyclone assembly has an inner cyclone assembly shell, the bottom of the inner cyclone assembly shell has a second lower cone shell, and the bottom of the atomizer support tube has a third lower cone shell, the first lower cone shell, the second lower cone shell, the outlet inner cone shell, and the third lower cone shell have the same cone angle, and the intersection of the extended lines of the generatrix of each cone shell is located on the center line of the outlet shell.

[0008] Preferably, it also includes a plurality of support tube brackets arranged on the top maintenance platform of the deacidification reaction tower, wherein the support tube brackets are provided with a plurality of second adjustment bolt holes for fixing the atomizer support tubes along the height direction, and the atomizer support tubes are adjustably mounted on the support tube brackets.

[0009] Preferably, a middle partition is provided in the central vertical direction of the horizontal flue section, and the middle partition divides the inner cavity of the horizontal flue section into two independent flues.

[0010] Preferably, the guide plate assembly comprises a plurality of arc guide plates distributed at equal intervals, and a first guide channel is formed between the arc guide plate and the inner wall of the flue shell, and between two adjacent arc guide plates.

[0011] Preferably, a support tube sealing flange is further provided on the guide plate assembly mounting flange, and the atomizer support tube is detachably mounted on the support tube sealing flange.

[0012] Preferably, the outlet shell comprises a cylindrical flue section and a first lower cone shell which are arranged in sequence from top to bottom. The cylindrical flue section of the outlet shell is connected to the vertical flue section via a conversion plate, and the conversion plate is a rectangular plate with a circular hole in the middle.

[0013] Preferably, there are four corner guide plates, which are obliquely installed on the inner side of each side wall of the vertical flue section.

[0014] Beneficial effects of the present invention: The smoke distributor of the present invention can effectively ensure uniform distribution and swirl effect of smoke, simplify the shell structure, reduce the load on the top of the reaction tower, and bring convenience to the design of the reaction tower. In addition, all components in the shell of the smoke distributor are detachable and replaceable, and can be maintained or replaced separately after wear; the flow area is adjustable, and when the smoke volume changes seasonally, the flow rate of the smoke and deacidification agent when mixing is ensured to be within the design range, thereby ensuring sufficient and uniform mixing and improving the deacidification efficiency of the reaction tower.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0016] Attached Figure 1 It is a schematic diagram of the overall structure of the assembly of the present invention.

[0017] Attached Figure 2 It is a schematic diagram of the overall internal structure of the assembly of the present invention.

[0018] Attached Figure 3 This is a schematic diagram of the structure of the double-layer swirl component.

[0019] Attached Figure 4 It is a schematic diagram showing the internal swirl component at a high position.

[0020] Attached Figure 5 It is a schematic diagram showing the internal swirl component located at a low position.

[0021] In the figure: 1. Flue shell; 2. Guide plate assembly mounting flange; 3. Atomizer support tube; 4. Support tube sealing flange; 5. Guide plate assembly; 6. Inspection hole; 7. Corner guide plate; 8. Conversion plate; 9. Outlet shell; 10. Outer swirl assembly; 11. Connecting plate; 12. Inner swirl assembly shell; 13. Inner swirl assembly; 14. Outlet inner cone shell; 15. Rotary atomizer and atomizing wheel; 16. Support tube bracket. [Specific implementation method]

[0022] See also Figures 1 to 5 The present invention discloses a flue gas distributor for a rotary spray deacidification reaction tower, which is arranged at the top of the deacidification reaction tower and comprises a flue shell 1, a guide plate assembly mounting flange 2, an atomizer support pipe 3, a guide plate assembly 5, a corner guide plate 7, and an outlet shell 9. The flue shell 1 comprises a horizontal flue section and a vertical flue section, the center line of the vertical flue section coincides with the center line of the deacidification reaction tower, a guide plate assembly mounting flange 2 is arranged on the top of the vertical flue section, the guide plate assembly 5 is detachably mounted on the guide plate assembly mounting flange 2, the guide plate assembly 5 can be removed by removing the fasteners (bolts), and the guide plate assembly 5 is convenient for lifting the guide plate assembly 5 to the upper maintenance platform for maintenance and repair; a height-adjustable atomizer support pipe 3 is also installed in the vertical flue section, a central slot for the atomizer support pipe 3 to pass through is provided on the guide plate assembly 5 and the guide plate assembly mounting flange 2, a plurality of first guide channels are provided in the guide plate assembly 5, and the inlet of the first guide channel The outlet is connected with the horizontal flue section, and several corner guide plates 7 are also installed in the vertical flue section, and a second guide channel is formed inside, the corner guide plate 7 is located below the outlet of the first guide channel, and the inlet of the second guide channel is connected with the outlet of the first guide channel. An outlet shell 9 is installed at the outlet of the vertical flue section, and the outlet of the horizontal flue section is connected with the inner cavity of the outlet shell 9 through the outlets of the first guide channel and the second guide channel. A double-layer swirl assembly is installed in the outlet shell 9, the lower end of the atomizer support tube 3 extends into the center of the double-layer swirl assembly, and a rotary atomizer and an atomizing wheel 15 are installed, the double-layer swirl assembly includes an outer swirl assembly 10 and an inner swirl assembly 13, the inner swirl assembly 13 is detachably connected to the outer swirl assembly 10 through several connecting plates 11, and the double-layer swirl assembly forms an inner and outer layer airflow channel that converges to the center of the deacidification reaction tower between the outlet shell 9 and the outer wall of the atomizer support tube 3.

[0023] Further, see Figure 2 and Figure 3The outer swirl assembly 10 and the inner swirl assembly 13 are respectively provided with a plurality of swirl blades uniformly distributed in the circumferential direction. Holes are opened on the swirl blades on the outer swirl assembly 10 and / or the inner swirl assembly 13, and are connected and fixed in series through circular connecting pieces to ensure the overall rigidity of the outer swirl assembly and / or the inner swirl assembly and the accurate positioning angle of the swirl blades. In this embodiment, each group of swirl assemblies includes 36 swirl plates to ensure the swirl effect of the flue gas.

[0024] Further, see Figures 2 to 5 , the connecting plate 11 is fixed on the inner side of the outer swirl assembly 10, and a plurality of first adjustment bolt holes for fixing the inner swirl assembly 13 are provided on the connecting plate 11 along the height direction, so that the relative heights of the outer swirl assembly 10 and the inner swirl assembly 13 can be adjusted. In the present embodiment, the connecting plate 11 is an L-shaped strip that is welded to the inner side of the frame shell of the outer swirl assembly 10, and 4 groups of first adjustment bolt holes are evenly distributed along the height direction, and the spacing between each group of bolt holes is 75 mm. By changing the installation position of the first adjustment bolt holes to adjust the height of the inner swirl assembly 13, the relative position of the inner swirl assembly 13 and the outer swirl assembly 10 and the shell in the vertical direction can be changed, thereby changing the cross-sectional area of ​​the outlet swirl channel. Figure 4 As shown, when the inner swirl assembly 13 is at a high position, the flow area increases and the flue gas flow rate decreases; Figure 5 As shown, when the inner swirl assembly 13 is at a low position, the flow area becomes smaller and the flue gas flow rate increases. The inner swirl assembly 13 at the lowest position can increase the flue gas flow rate by about 1.57 times compared to the highest position.

[0025] Further, see Figure 2 The double-layer cyclone assembly also includes an outlet inner cone shell 14 welded to the lower part of the inner cyclone assembly 13, a first lower cone shell at the bottom of the outlet shell 9, an inner cyclone assembly shell 12 on the outer side of the inner cyclone assembly 13, a second lower cone shell at the bottom of the inner cyclone assembly shell 12, and a third lower cone shell at the bottom of the atomizer support tube 3. The cone angles of the first lower cone shell, the second lower cone shell, the outlet inner cone shell 14, and the third lower cone shell are the same, all of which are 60 degrees, and the intersection of the extension lines of the generatrix of each cone shell is located on the center line of the outlet shell 9. The four cone shells evenly divide the flue gas into 3 layers or 2 layers (when the inner cyclone assembly 13 is at the lowest position) of flue gas that converges to the center of the deacidification reaction tower, ensuring that the flue gas is mixed with the deacidification agent at an angle of 60° at the designed flow rate, accelerating the heat exchange between the deacidification agent at room temperature and the hot flue gas, and improving the deacidification efficiency.

[0026] Further, see Figure 1 and Figure 2It also includes a plurality of support tube brackets 16 arranged on the maintenance platform at the top of the deacidification reaction tower, and a plurality of second adjustment bolt holes for fixing the atomizer support tube 3 are arranged on the support tube bracket 16 along the height direction. The atomizer support tube 3 is adjustably installed on the support tube bracket 16. The height of the atomizer support tube 3 is adjusted by adjusting the position of the second adjustment bolt hole installed on the support tube bracket 16, thereby ensuring that the relative positions of the rotary atomizer and the atomizing wheel 15 and the inner cyclone component 13 are fixed, so that the flue gas and the deacidification agent are always mixed at the optimal designed position.

[0027] Further, see Figure 2 The flue shell 1 is in a right angle shape, the inlet cross-section of the flue shell 1 is a rectangle with a height h, and the outlet cross-section of the outlet shell 9 is a circle; the cross-section of the horizontal flue section is rectangular, and a middle partition is arranged in the vertical direction of the center. The middle partition divides the inner cavity of the horizontal flue section into two independent flues, and evenly guides the smoke to the left and right sides, so as to avoid uneven smoke distribution on both sides of the inlet due to dust accumulation at the right angle.

[0028] Further, see Figure 2 The guide plate assembly 5 includes a plurality of equally spaced arc guide plates. A first guide channel is formed between the arc guide plate and the inner wall of the flue housing 1, and between two adjacent arc guide plates. In this embodiment, the guide plate assembly 5 is composed of 5 arc guide plates, which are welded as a whole through side plates and top flanges. The spacing between the arc guide plates is h / 6, which can ensure that the flue gas is evenly distributed after passing through the right-angle flue. The center of the arc guide plate is slotted for placing the atomizer support tube 3 into the vertical flue.

[0029] Further, see Figure 2 A support tube sealing flange 4 is also provided on the guide plate assembly mounting flange 2, and the atomizer support tube 3 is detachably mounted on the support tube sealing flange 4. By removing the bolts and seals of the sealing flange, the atomizer support tube 3 can be removed separately, so that the atomizer support tube 3 can be lifted to the maintenance platform for maintenance or replacement.

[0030] Further, see Figure 2 The outlet shell 9 includes a cylindrical flue section and a first lower cone shell which are arranged in sequence from top to bottom. The cone angle of the first lower cone shell is 60°. The intersection of the extended line of the cone generatrix is ​​located on the center line of the deacidification reaction tower. The cylindrical flue section of the outlet shell 9 is connected to the vertical flue section through a conversion plate 8. The conversion plate 8 is a rectangular plate with a circular hole in the middle.

[0031] Further, see Figure 2There are four corner guide plates 7, which are installed obliquely on the inner side of each side wall of the vertical flue section, and the angle between the intersection line with the adjacent vertical flue section side wall is 45°, ensuring that the flue gas enters the lower swirl component smoothly and evenly.

[0032] Further, referring to FIG. 2 , the side wall of the vertical flue section is provided with an inspection hole 6 , through which the guide plate assembly 5 and the lower components in the vertical flue section can be checked and maintained or replaced when necessary.

[0033] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A flue gas distributor for a rotary spray deacidification reaction tower, arranged at the top of the deacidification reaction tower, characterized in that: The invention comprises a flue shell (1), a guide plate assembly mounting flange (2), an atomizer support pipe (3), a guide plate assembly (5), a corner guide plate (7), an outlet shell (9), a rotary atomizer and an atomizer wheel (15), wherein the flue shell (1) comprises a horizontal flue section and a vertical flue section, a guide plate assembly mounting flange (2) is arranged at the top of the vertical flue section, the guide plate assembly (5) is detachably mounted on the guide plate assembly mounting flange (2), a height-adjustable atomizer support pipe (3) is also installed in the vertical flue section, a central slot for the atomizer support pipe (3) to pass through is provided on the guide plate assembly (5) and the guide plate assembly mounting flange (2), a plurality of first guide channels are provided in the guide plate assembly (5), and a plurality of corner guide channels are also installed in the vertical flue section. A flow plate (7) is provided, and a second flow guide channel is formed inside. An outlet shell (9) is installed at the outlet of the vertical flue section. The horizontal flue section is connected to the inner cavity of the outlet shell (9) through the first flow guide channel and the second flow guide channel. A double-layer cyclone component is installed in the outlet shell (9). The lower end of the atomizer support tube (3) extends into the center of the double-layer cyclone component, and a rotary atomizer and an atomizing wheel (15) are installed. The double-layer cyclone component includes an outer cyclone component (10) and an inner cyclone component (13). The inner cyclone component (13) is detachably connected to the outer cyclone component (10) through a plurality of connecting plates (11). The double-layer cyclone component forms an inner and outer layer airflow channel that converges toward the center of the deacidification reaction tower between the outlet shell (9) and the outer wall of the atomizer support tube (3).

2. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: The outer swirl assembly (10) and the inner swirl assembly (13) are respectively provided with a plurality of swirl blades evenly distributed in the circumferential direction. Holes are opened on the swirl blades on the outer swirl assembly (10) and / or the inner swirl assembly (13) and they are connected and fixed in series via a circular connecting piece.

3. A flue gas distributor for a rotary spray deacidification reaction tower as claimed in claim 1 or 2, characterized in that: The connecting plate (11) is fixed on the inner side of the outer swirl assembly (10), and a plurality of first adjustment bolt holes for fixing the inner swirl assembly (13) are provided on the connecting plate (11) along the height direction, so that the relative heights of the outer swirl assembly (10) and the inner swirl assembly (13) can be adjusted.

4. A flue gas distributor for a rotary spray deacidification reaction tower as claimed in claim 1 or 2, characterized in that: The double-layer cyclone assembly also includes an outlet inner cone shell (14) welded to the lower part of the inner cyclone assembly (13), a first lower cone shell is provided at the bottom of the outlet shell (9), an inner cyclone assembly shell (12) is provided on the outer side of the inner cyclone assembly (13), a second lower cone shell is provided at the bottom of the inner cyclone assembly shell (12), and a third lower cone shell is provided at the bottom of the atomizer support tube (3); the first lower cone shell, the second lower cone shell, the outlet inner cone shell (14), and the third lower cone shell have the same cone angle, and the intersection of the extended lines of the generatrix of each cone shell is located on the center line of the outlet shell (9).

5. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: It also includes a plurality of support tube brackets (16) arranged on the maintenance platform at the top of the deacidification reaction tower, wherein the support tube brackets (16) are provided with a plurality of second adjustment bolt holes for fixing the atomizer support tube (3) along the height direction, and the atomizer support tube (3) is adjustably mounted on the support tube brackets (16).

6. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: A middle partition is arranged in the vertical direction of the center of the horizontal flue section, and the middle partition divides the inner cavity of the horizontal flue section into two independent flues.

7. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: The guide plate assembly (5) comprises a plurality of arc-shaped guide plates distributed at equal intervals, and a first guide channel is formed between the arc-shaped guide plates and the inner wall of the flue casing (1), and between two adjacent arc-shaped guide plates.

8. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: A support tube sealing flange (4) is also provided on the guide plate assembly mounting flange (2), and the atomizer support tube (3) is detachably mounted on the support tube sealing flange (4).

9. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: The outlet shell (9) comprises a cylindrical flue section and a first lower cone shell which are arranged in sequence from top to bottom. The cylindrical flue section of the outlet shell (9) is connected to the vertical flue section via a conversion plate (8). The conversion plate (8) is a rectangular plate with a circular hole in the middle.

10. The flue gas distributor of a rotary spray deacidification reaction tower according to claim 1, characterized in that: There are four corner guide plates (7), which are respectively installed obliquely on the inner side of each side wall of the vertical flue section.

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