Air ratio dividing device for fluidized bed of decomposing furnace

Abstract

The utility model relates to the technical field of flue gas desulfurization equipment, in particular to an air ratio dividing device for a fluidized bed of a decomposing furnace, which comprises a base, a hollow first shell is mounted at the bottom end of the outer wall of the rotating shaft and communicates with the rotating shaft, and a plurality of first fan blades are fixed to the top of the first shell; the rotating shaft rotates to drive the first shell and the second shell to rotate, the first shell drives the multiple first fan blades to rotate, the first fan blades rotate to generate spiral ascending air flow, sulfide and lime spirally ascend under the action of the ascending air flow, and the sulfide and the lime are pushed to be fully suspended; under the action of airflow generated by rotation of a plurality of second fan blades, sulfide and lime are fully suspended and mixed, through the design, the high-speed airflow is fed into the decomposing furnace, full suspension and mixing between the sulfide and the lime are facilitated, the contact efficiency of the sulfide and the lime is improved, and therefore the desulfurization effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization equipment, in particular to an air distribution ratio device for a fluidized bed of a decomposition furnace. Background Art

[0002] A decomposition furnace fluidized bed is a device that uses high-speed airflow to suspend solid particles in the airflow, forming a fluid-like state, thereby realizing processes such as material mixing, reaction, and heat transfer. In a decomposition furnace fluidized bed, when gases (such as air, nitrogen, etc.) pass through the bed, their speed gradually increases to a critical value for suspending the particles, the gaps between the particles increase, the bed volume expands, and a fluidized bed is formed. In a decomposition furnace fluidized bed, the air distribution ratio is an important operating parameter, which refers to the proportional relationship between the airflows entering different areas or layers in the decomposition furnace. A reasonable air distribution ratio is of great significance to the stable operation and efficient combustion of the decomposition furnace.

[0003] The utility model patent with authorization announcement number CN211146457U discloses a circulating fluidized bed for flue gas desulfurization, which includes an air inlet pipe, a decomposition furnace, an exhaust pipe, an absorption tower, and a connecting pipe. The air inlet pipe is fixedly installed on the outer surface of the decomposition furnace, and a decomposition assembly is fixedly installed inside the decomposition furnace. The upper surface of the decomposition furnace is fixedly connected to a connecting pipe, and the other end of the connecting pipe is fixedly installed on the outer surface of the absorption tower. The absorption device is fixedly installed inside the absorption tower, and the exhaust pipe is fixedly installed on the top of the absorption tower. The decomposition assembly includes a motor, spiral blades, a lime storage tank, a rotating shaft, and a fixed sleeve. The motor is fixedly installed at the center of the upper surface of the decomposition furnace, and a lime storage tank is fixedly installed on the upper surface of the decomposition furnace on one side of the motor. The output end of the motor is fixedly connected to the rotating shaft, which is installed inside the motor, and the outer surface of the rotating shaft is fixedly installed with a fixed sleeve, and the outer surface of the fixed sleeve is welded with spiral blades. By installing a rotating shaft inside the decomposition furnace, the rotating shaft is driven to rotate by a motor. During the rotation of the rotating shaft, the fixed sleeve and the spiral blades are driven to rotate. As well as the lime storage tank installed on the top of the decomposition furnace, the high-speed rotation of the spiral blades accelerates the flue gas flow rate inside the decomposition furnace, so that the sulfide in the flue gas and the lime are fully reacted inside the decomposition furnace for desulfurization, thereby improving the desulfurization efficiency, effectively ensuring that the sulfide components will not enter the absorption tower, and further extending the service life of the equipment.

[0004] Although the circulating fluidized bed for flue gas desulfurization improves the desulfurization efficiency through the rotation of spiral blades, the device still has the following problems in actual use: when treating flue gas, the device reacts the sulfide in the flue gas with lime through spiral blades, and the decomposition furnace is not equipped with an air inlet structure, which results in a low air flow velocity in the decomposition furnace, resulting in the inability to fully suspend and mix solid particles (such as lime). At the same time, in the absence of sufficient air flow, the heat transfer efficiency in the decomposition furnace will also be reduced, which will directly affect the contact efficiency between sulfide and lime, thereby reducing the desulfurization effect. In view of this, we propose a decomposition furnace fluidized bed air distribution ratio device. Utility Model Content

[0005] The purpose of the utility model is to provide a decomposition furnace fluidized bed air distribution ratio device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A decomposition furnace fluidized bed air distribution ratio device comprises a base, a top seat is provided above the base; a decomposition furnace is fixed on the top of the top seat, the decomposition furnace passes through the top seat and is fixed to the top seat, and a detachable cover plate is installed at the top opening of the decomposition furnace;

[0008] The decomposition furnace is internally rotatably installed with an air supply portion, which includes a hollow rotating shaft, the top end of the rotating shaft is coaxially fixed with a connecting shaft, the connecting shaft passes through the cover plate and is rotatably connected to the cover plate, the bottom end of the rotating shaft passes through the bottom end of the decomposition furnace and is rotatably connected to the decomposition furnace, a hollow first shell is installed at the bottom end of the outer wall of the rotating shaft, the first shell is communicated with the rotating shaft, a plurality of first fan blades are fixed on the top of the first shell, and a plurality of first air holes are opened between two adjacent first fan blades; a plurality of spiral blades are also coaxially keyed to the rotating shaft, and the top ends of the spiral blades are each provided with a second shell coaxially keyed to the rotating shaft, a plurality of second air holes are opened on the outer wall of the second shell, and a second fan blade is fixed between two adjacent second air holes; a transmission assembly is also provided at the bottom end of the rotating shaft; a motor is installed at the lower rear side of the transmission assembly, and the output shaft of the motor drives the rotating shaft to rotate through the transmission assembly;

[0009] An air supply device is installed at the top front side of the base, an air supply pipe is installed at the air outlet of the air supply device, a rotary joint is installed at the top of the air supply pipe, and the rotating shaft is rotatably connected to the air supply pipe through the rotary joint and communicated with the air supply pipe.

[0010] Preferably, support rods are fixed at the four corners between the base and the top seat, and the support rods are fixedly connected to the base and the top seat by bolts.

[0011] Preferably, the transmission assembly includes a first pulley connected to the rotating shaft with a coaxial key, a second pulley is provided on the rear side of the first pulley and is coaxially keyed to the output shaft of the motor, and a belt is provided between the first pulley and the second pulley.

[0012] Preferably, the cross-section of the first fan blade and the second fan blade is arc-shaped, and the first fan blade and the second fan blade are distributed in a circular shape with equal intervals.

[0013] Preferably, the cross-sections of the first pores and the second pores are circular, and the first pores and the second pores are distributed in a circular shape with equal intervals.

[0014] Preferably, the cover plate is fixedly connected to the decomposition furnace by bolts, and a discharge port connected to the decomposition furnace is installed on the top of the cover plate.

[0015] Preferably, a feed pipe is fixed to the outer wall of the decomposition furnace near the bottom end, and the horizontal height of the feed pipe is greater than the horizontal height of the first shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Through the provided air supply part: the air supply device sends high-speed airflow into the interior of the hollow shaft, and the airflow is ejected through the first air hole and the second air hole at the same time. At this time, the rotation of the shaft drives the first shell and the second shell to rotate, and the first shell drives the multiple first blades to rotate. The rotation of the first blades generates a spiral upward airflow. Under the action of the upward airflow, the sulfide and lime rise in a spiral shape, and under the action of the multiple spiral blades, the sulfide and lime are pushed to be fully suspended. When the sulfide and lime move to the second shell, under the action of the airflow generated by the rotation of the multiple second blades, the sulfide and lime are fully suspended and mixed. This design is beneficial to the full suspension and mixing of the sulfide and lime by sending the high-speed airflow into the decomposition furnace, which is beneficial to improving the contact efficiency of the sulfide and lime, thereby improving the desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0020] Figure 3 This is a structural diagram of the air delivery part of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the first shell in the present utility model;

[0022] In the picture:

[0023] 1. Base; 10. Support rod; 11. Side panel;

[0024] 2. Top seat;

[0025] 3. Decomposition furnace; 30. Cover plate; 31. Discharge port; 32. Feed pipe;

[0026] 4. Air delivery unit; 40. Rotating shaft; 41. First housing; 410. First air hole; 411. First blade; 42. Second housing; 420. Second air hole; 421. Second blade; 43. Spiral blade; 44. Connecting shaft; 45. Transmission assembly; 450. First pulley; 451. Second pulley; 452. Belt;

[0027] 5. Motor;

[0028] 6. Air supply device; 60. Air supply pipe; 61. Rotary joint. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] This embodiment provides a technical solution:

[0031] See also Figure 1-Figure 4As shown, a decomposition furnace fluidized bed air distribution ratio device includes a base 1, a top seat 2 is provided above the base 1; a decomposition furnace 3 is fixed on the top of the top seat 2, the decomposition furnace 3 passes through the top seat 2 and is fixed to the top seat 2, and a detachable cover plate 30 is installed at the top opening of the decomposition furnace 3; an air supply part 4 is rotatably installed inside the decomposition furnace 3, and the air supply part 4 includes a hollow rotating shaft 40, and a connecting shaft 44 is coaxially fixed to the top of the rotating shaft 40. The connecting shaft 44 passes through the cover plate 30 and is rotatably connected to the cover plate 30, and the bottom end of the rotating shaft 40 passes through the bottom end of the decomposition furnace 3 and is rotatably connected to the decomposition furnace 3, and a hollow first shell 41 is installed at the bottom end of the outer wall of the rotating shaft 40, and the first shell 41 is connected to the rotating shaft 40. A plurality of first fan blades 411 are fixed on the top of the first shell 41, and there is a space between two adjacent first fan blades 411. A plurality of first air holes 410 are provided; a plurality of spiral blades 43 are coaxially keyed to the rotating shaft 40, and a second shell 42 coaxially keyed to the rotating shaft 40 is provided at the top end of the spiral blade 43, and a plurality of second air holes 420 are provided on the outer wall of the second shell 42, and a second fan blade 421 is fixed between two adjacent second air holes 420; a transmission assembly 45 is also provided at the bottom end of the rotating shaft 40; a motor 5 is installed at the lower rear side of the transmission assembly 45, and the output shaft of the motor 5 drives the rotating shaft 40 to rotate through the transmission assembly 45; an air supply device 6 is installed at the top front side of the base 1, and an air supply pipe 60 is installed at the air outlet of the air supply device 6, and a rotary joint 61 is installed at the top end of the air supply pipe 60, and the rotating shaft 40 is rotatably connected to the air supply pipe 60 through the rotary joint 61 and communicated with the air supply pipe 60.

[0032] In this embodiment, support rods 10 are fixed at the four corners between the base 1 and the top seat 2, and the support rods 10 are fixedly connected to the base 1 and the top seat 2 by bolts. The provision of the support rods 10 increases the stability and reliability of the connection between the base 1 and the top seat 2.

[0033] In this embodiment, the transmission assembly 45 includes a first pulley 450 coaxially keyed to the rotating shaft 40. A second pulley 451 coaxially keyed to the output shaft of the motor 5 is disposed behind the first pulley 450. A belt 452 is disposed between the first pulley 450 and the second pulley 451. This design facilitates the rotation of the rotating shaft 40 driven by the motor 5.

[0034] In this embodiment, the cross-sections of the first blades 411 and the second blades 421 are arc-shaped, and the first blades 411 and the second blades 421 are evenly spaced in a circular pattern. This design facilitates high-speed airflow driven by the first blades 411 and the second blades 421, thereby facilitating sufficient suspension and mixing of the sulfide and lime.

[0035] In this embodiment, the cross-sections of the first and second air holes 410, 420 are circular, and the first and second air holes 410, 420 are evenly spaced in a circular pattern. This design facilitates the first and second air holes 410, 420 to deliver high-speed airflow into the decomposition furnace 3, thereby facilitating the sufficient suspension and mixing of the sulfide and lime under the action of the airflow.

[0036] In this embodiment, the cover plate 30 is fixedly connected to the decomposition furnace 3 by bolts. A discharge port 31 is installed on the top of the cover plate 30 and communicates with the decomposition furnace 3. The provision of the discharge port 31 facilitates the discharge of post-reaction gases, etc.; the bolted fixing method facilitates the removal and installation of the cover plate 30, facilitating the later inspection and maintenance of the interior of the decomposition furnace 3.

[0037] In this embodiment, a feed pipe 32 is fixed to the outer wall of the calciner 3 near the bottom end. The height of the feed pipe 32 is greater than the height of the first shell 41. This design facilitates the discharge of flue gas and lime into the calciner 3 through the feed pipe 32. At the same time, this height design facilitates the lime entering the feed pipe 32 to be fully suspended by the rising airflow generated by the first fan blade 411.

[0038] It can be understood that in this embodiment, a side plate 11 is fixed between the two support rods 10 on the rear side, and the motor 5 is fixedly connected to the side plate 11 by bolts. The side plate 11 supports the motor 5 and ensures the installation reliability of the motor 5.

[0039] It should be added that the air supply device 6 in this embodiment is an air pump, which can deliver a high-speed airflow into the decomposition furnace 3 to meet the reaction requirements of sulfide and lime.

[0040] It is worth noting that the motor 5 involved in this embodiment is an existing conventional technology and will not be described in detail here.

[0041] When in use, the user first turns on the power of the motor 5 and the air supply device 6, and the motor 5 and the air supply device 6 start working. The output shaft of the motor 5 rotates to drive the second pulley 451 to rotate. Under the action of the belt 452, the first pulley 450 rotates and drives the rotating shaft 40 to rotate. The rotating shaft 40 drives the first shell 41, the second shell 42 and the spiral blade 43 to rotate. The first blade 411 and the second blade 421 rotate at the same time. At the same time, the high-speed airflow enters the rotating shaft 40 through the air supply pipe 60 and directly enters The high-speed airflow is discharged into the first shell 41 and the second shell 42 at the same time through the first air hole 410 and the second air hole 420. At this time, the first fan blade 411 rotates to generate a spiral upward airflow, and the sulfide and lime rise under the action of the airflow. When the sulfide and lime move to the spiral blade 43, the sulfide and lime are mixed. When the sulfide and lime move to the second fan blade 421, the sulfide and lime are mixed again. At this time, the sulfide and lime fully react, and finally the reacted gas is discharged through the discharge port 31.

[0042] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A decomposition furnace fluidized bed air distribution ratio device, comprising a base (1), characterized in that: A top seat (2) is provided above the base (1); a decomposition furnace (3) is fixed on the top of the top seat (2); the decomposition furnace (3) passes through the top seat (2) and is fixed to the top seat (2); a detachable cover plate (30) is installed at the top opening of the decomposition furnace (3); An air delivery portion (4) is rotatably installed inside the decomposition furnace (3). The air delivery portion (4) includes a hollow rotating shaft (40). A connecting shaft (44) is coaxially fixed to the top of the rotating shaft (40). The connecting shaft (44) passes through the cover plate (30) and is rotatably connected to the cover plate (30). The bottom end of the rotating shaft (40) passes through the bottom end of the decomposition furnace (3) and is rotatably connected to the decomposition furnace (3). A hollow first shell (41) is installed at the bottom end of the outer wall of the rotating shaft (40). The first shell (41) is connected to the rotating shaft (40). A plurality of first blades (411) are fixed to the top of the first shell (41). The space between two adjacent first blades (411) is substantially equal to the distance between the first blades (411). A plurality of first air holes (410) are provided at the rotating shaft (40); a plurality of spiral blades (43) are coaxially keyed to the rotating shaft (40); a second shell (42) coaxially keyed to the rotating shaft (40) is provided at the top of each spiral blade (43); a plurality of second air holes (420) are provided on the outer wall of the second shell (42); a second fan blade (421) is fixed between two adjacent second air holes (420); a transmission assembly (45) is provided at the bottom end of the rotating shaft (40); a motor (5) is installed at the lower rear side of the transmission assembly (45), and the output shaft of the motor (5) drives the rotating shaft (40) to rotate through the transmission assembly (45); An air supply device (6) is installed at the front side of the top of the base (1), an air supply pipe (60) is installed at the air outlet of the air supply device (6), a rotary joint (61) is installed at the top end of the air supply pipe (60), and the rotating shaft (40) is rotatably connected to the air supply pipe (60) through the rotary joint (61) and communicated with the air supply pipe (60).

2. The air distribution ratio device for the fluidized bed of a decomposition furnace according to claim 1, characterized in that: Support rods (10) are fixed at four corners between the base (1) and the top seat (2), and the support rods (10) are fixedly connected to the base (1) and the top seat (2) through bolts.

3. The air distribution ratio device for a decomposition furnace fluidized bed according to claim 1, characterized in that: The transmission assembly (45) includes a first pulley (450) coaxially keyed to the rotating shaft (40), a second pulley (451) coaxially keyed to the output shaft of the motor (5) is provided on the rear side of the first pulley (450), and a belt (452) is provided between the first pulley (450) and the second pulley (451).

4. The air distribution ratio device for a decomposition furnace fluidized bed according to claim 1, characterized in that: The cross-sections of the first fan blade (411) and the second fan blade (421) are arc-shaped, and the first fan blade (411) and the second fan blade (421) are both distributed in a circular shape with equal spacing.

5. The air distribution ratio device for a calciner fluidized bed according to claim 1, characterized in that: The cross-sectional shapes of the first air holes (410) and the second air holes (420) are circular, and the first air holes (410) and the second air holes (420) are both distributed in an annular shape with equal intervals.

6. The air distribution ratio device for a calciner fluidized bed according to claim 1, characterized in that: The cover plate (30) is fixedly connected to the decomposition furnace (3) by means of bolts, and a discharge port (31) communicating with the decomposition furnace (3) is installed on the top of the cover plate (30).

7. The air distribution ratio device for a calciner fluidized bed according to claim 1, characterized in that: A feed pipe (32) is fixed to the outer wall of the decomposition furnace (3) near the bottom end, and the horizontal height of the feed pipe (32) is greater than the horizontal height of the first shell (41).

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