A new combined air inlet structure for fluidized bed

Abstract

The present application belongs to the field of chemical technology, and particularly relates to a combined gas inlet structure for a new type of fluidized bed. The combined gas inlet structure comprises a cylinder body, a lower head arranged at the lower part of the cylinder body, an upper distribution plate and a lower distribution plate arranged in the cylinder body, a first gas inlet pipe connected to the lower head, a second gas inlet pipe connected to the lower distribution plate, the second gas inlet pipe extending from the lower head, a plurality of short gas nozzles arranged on the upper distribution plate, a cavity between the upper distribution plate and the lower distribution plate being in communication with the gas inlet ends of the short gas nozzles, and an inner cavity of the cylinder body above the upper distribution plate being in communication with the gas outlet ends of the short gas nozzles, a plurality of long gas nozzles arranged between the upper distribution plate and the lower distribution plate, a cavity between the lower distribution plate and the lower head being in communication with the gas inlet ends of the long gas nozzles, and an inner cavity of the cylinder body above the upper distribution plate being in communication with the gas outlet ends of the long gas nozzles. The present application provides a combined gas inlet structure for a new type of fluidized bed, which has uniform gas distribution and good fluidization effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of chemical technology, and particularly relates to a new combined gas inlet structure for fluidized bed. BACKGROUND

[0002] The fluidized bed reactor usually adopts a single-layer distribution plate and a single gas inlet, and when the diameter of the reactor is large, the gas distribution is very uneven, which affects the fluidization effect; and the thickness of the single-layer distribution plate is also large, and the processing and welding are difficult. SUMMARY

[0003] In order to solve the above problems existing in the prior art, the purpose of the present application is to provide a new combined gas inlet structure for fluidized bed, which has uniform gas distribution and good fluidization effect.

[0004] The technical scheme adopted by the present application is as follows:

[0005] The new combined gas inlet structure for fluidized bed comprises a cylinder body, a lower head arranged at the lower part of the cylinder body, an upper distribution plate and a lower distribution plate installed in the cylinder body, a first gas inlet pipe connected to the lower head, a second gas inlet pipe connected to the lower distribution plate, and the second gas inlet pipe extending from the lower head; a plurality of short gas nozzles are installed on the upper distribution plate, a cavity between the upper distribution plate and the lower distribution plate is in communication with the gas inlet ends of the short gas nozzles, and the inner cavity of the cylinder body above the upper distribution plate is in communication with the gas outlet ends of the short gas nozzles; a plurality of long gas nozzles are installed between the upper distribution plate and the lower distribution plate, a cavity between the lower distribution plate and the lower head is in communication with the gas inlet ends of the long gas nozzles, and the inner cavity of the cylinder body above the upper distribution plate is in communication with the gas outlet ends of the long gas nozzles.

[0006] The present application adopts double-layer distribution plates, and a middle gas cavity is formed between the upper distribution plate and the lower distribution plate, and a lower gas cavity is formed between the lower distribution plate and the lower head, and the middle gas cavity and the lower gas cavity are respectively connected to different types or different numbers of gas nozzles.

[0007] The present application adopts double gas inlets for combined gas inlet, one gas inlet is connected to the middle gas cavity, and the other gas inlet is connected to the lower gas cavity, and the gas is introduced into the cylinder body from the two gas cavities respectively, and the fluidization effect and the reaction effect can be improved by adjusting the gas inlet speed or temperature of different gas inlets.

[0008] As a preferred scheme of the present application, the plurality of long gas nozzles and the plurality of short gas nozzles except the one located at the center of the upper distribution plate are arranged at intervals. The gas in the middle gas cavity and the lower gas cavity is introduced into the cylinder body uniformly from the upper distribution plate, which ensures the overall uniformity of the gas inlet and further improves the fluidization effect and the reaction effect.

[0009] As a preferred scheme of the present application, the first gas inlet pipe is connected to the center of the lower head, and the second gas inlet pipe is connected to the center of the lower distribution plate. Since the bottom of the lower head is in a spherical shape, the gas space gradually decreases and the pressure gradually increases from the center of the lower head to the outside, so when the gas is introduced into the lower gas cavity from the center of the lower head through the first gas inlet pipe, the velocity difference of the gas entering each long gas nozzle is reduced, thereby ensuring uniform gas inlet among the long gas nozzles.

[0010] As a preferred scheme of the present application, the center of the upper distribution plate is fixed with a center short sleeve, and the short gas nozzle at the center of the upper distribution plate is connected to the center short sleeve. The short gas nozzle at the center of the upper distribution plate is opposite to the second gas inlet pipe, so the center short sleeve cannot be extended to the lower distribution plate.

[0011] As a preferred scheme of the present application, a slotted sleeve is fixed between the upper distribution plate and the lower distribution plate, the slotted sleeve is slotted at a section between the upper distribution plate and the lower distribution plate, the short gas nozzle at the center of the upper distribution plate is connected to the slotted sleeve, and a sealing screw plug is connected to the lower end of the slotted sleeve. The slot of the slotted sleeve is communicated with the upper gas cavity, so the gas in the upper gas cavity can enter the short gas nozzle through the slot of the slotted sleeve. The sealing screw plug is used for sealing the slotted sleeve and cleaning the medium particles.

[0012] As a preferred scheme of the present application, a long sleeve is fixed between the upper distribution plate and the lower distribution plate, and the long gas nozzle is connected to the long sleeve. The long sleeve is used for mounting the long gas nozzle and effectively isolating the lower gas cavity and the upper gas cavity.

[0013] As a preferred scheme of the present application, the lower head is fixed with a first sealing sleeve, the first gas inlet pipe is sleeved in the first sealing sleeve, and one end of the first sealing sleeve is sealingly connected with the first gas inlet pipe. The first sealing sleeve can seal the gap between the lower head and the first gas inlet pipe.

[0014] As a preferred scheme of the present application, the lower head is fixed with a second sealing sleeve, the second gas inlet pipe is sleeved in the second sealing sleeve, and one end of the second sealing sleeve is sealingly connected with the second gas inlet pipe. The second sealing sleeve can seal the gap between the lower head and the second gas inlet pipe.

[0015] As a preferred scheme of the present application, the outlet end of each of the short gas nozzle and the long gas nozzle is in a conical shape, a plurality of gas outlet holes are arranged on the conical surface and the cylindrical surface of the short gas nozzle, and a plurality of gas outlet holes are arranged on the conical surface and the cylindrical surface of the long gas nozzle. After the gas enters the short gas nozzle or the long gas nozzle, the gas is uniformly sprayed from the plurality of gas outlet holes on the conical surface and the cylindrical surface, thereby ensuring that the gas is fully dispersed in the cylinder.

[0016] As a preferred scheme of the present application, the upper distribution plate and the lower distribution plate are both in the shape of a downward convex curve. The shape of the lower distribution plate is a downward convex curve, so the tendency of the lower gas cavity to gradually decrease from the middle part to the outside is further increased, ensuring that the gas can enter the long-type gas nozzles more evenly.

[0017] The present application has the following advantages:

[0018] The present application adopts double-inlet-port combined gas inlet, one inlet port is connected with the middle gas cavity and the other inlet port is connected with the lower gas cavity, and the gas is introduced into the cylinder from the two gas cavities respectively, so that the fluidization effect and the reaction effect can be improved by adjusting the gas inlet speed or temperature of different inlet ports. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present application;

[0020] Figure 2 is Figure 1 is a local enlarged view of A in the middle part;

[0021] Figure 3 is Figure 1 is a local enlarged view of B in the middle part.

[0022] In the figure: 1-first gas inlet pipe; 2-second gas inlet pipe; 3-upper distribution plate; 4-lower distribution plate; 5-cylinder; 6-lower head; 7-short-type gas nozzle; 8-long-type gas nozzle; 9-long-type sleeve; 10-slotted sleeve; 11-sealing plug; 12-central short-type sleeve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0025] As Figures 1-3The new combined gas inlet structure for fluidized bed of the embodiment includes a cylinder 5, a lower head 6 arranged at the lower part of the cylinder 5, an upper distribution plate 3 and a lower distribution plate 4 installed in the cylinder 5, a first gas inlet pipe 1 connected to the lower head 6, a second gas inlet pipe 2 connected to the lower distribution plate 4, and the second gas inlet pipe 2 extending out of the lower head 6; a plurality of short gas nozzles 7 are installed on the upper distribution plate 3, the cavity between the upper distribution plate 3 and the lower distribution plate 4 is in communication with the gas inlet end of the short gas nozzles 7, and the inner cavity of the cylinder 5 above the upper distribution plate 3 is in communication with the gas outlet end of the short gas nozzles 7; a plurality of long gas nozzles 8 are installed between the upper distribution plate 3 and the lower distribution plate 4, the cavity between the lower distribution plate 4 and the lower head 6 is in communication with the gas inlet end of the long gas nozzles 8, and the inner cavity of the cylinder 5 above the upper distribution plate 3 is in communication with the gas outlet end of the long gas nozzles 8.

[0026] The upper distribution plate 3 and the lower distribution plate 4 form a middle gas cavity therebetween, the lower distribution plate 4 and the lower head 6 form a lower gas cavity therebetween, and the middle gas cavity and the lower gas cavity are respectively connected to different types or different numbers of gas nozzles.

[0027] The combined gas inlet of the embodiment adopts two gas inlets, one of which is connected to the middle gas cavity and the other of which is connected to the lower gas cavity, and the gas is introduced into the cylinder 5 from the two gas cavities, respectively, so that the fluidization effect and the reaction effect can be improved by adjusting the gas inlet speed or temperature of different gas inlets.

[0028] The long gas nozzles 8 and the short gas nozzles 7 except the one located at the center of the upper distribution plate 3 are arranged at intervals. The gas in the middle gas cavity and the lower gas cavity is introduced into the cylinder 5 from the upper distribution plate 3 uniformly, so that the overall uniformity of the gas inlet is ensured and the fluidization effect and the reaction effect are further improved.

[0029] The first gas inlet pipe 1 is connected to the center of the lower head 6, and the second gas inlet pipe 2 is connected to the center of the lower distribution plate 4. Since the bottom of the lower head 6 is in the shape of a sphere, the gas space gradually decreases and the pressure gradually increases from the middle part of the lower head 6 to the outside, so that when the gas is introduced into the lower gas cavity from the center of the lower head 6 through the first gas inlet pipe 1, the speed difference of the gas entering each long gas nozzle 8 is reduced, and the uniformity of the gas inlet among the long gas nozzles 8 is ensured.

[0030] The upper distribution plate 3 and the lower distribution plate 4 are both in the shape of a downward convex curve. The lower distribution plate 4 is in the shape of a downward convex curve, so that the trend of the lower gas cavity gradually decreasing from the middle part to the outside is further increased, and the gas can be introduced into each long gas nozzle 8 more uniformly.

[0031] The center of the upper distribution plate 3 is fixed with a center short sleeve 12, and the short gas nozzle 7 in the center of the upper distribution plate 3 is screwed into the center short sleeve 12. The short gas nozzle 7 in the center of the upper distribution plate 3 is opposite to the second gas inlet pipe 2, so the center short sleeve cannot be extended to the lower distribution plate 4.

[0032] A slotted sleeve 10 is fixed between the upper distribution plate 3 and the lower distribution plate 4, and the slotted sleeve 10 is slotted at a section between the upper distribution plate 3 and the lower distribution plate 4. Except that the short gas nozzle 7 in the center of the upper distribution plate 3 is screwed into the slotted sleeve 10, the lower end of the slotted sleeve 10 is connected with a sealing screw plug 11. The slot on the slotted sleeve 10 is communicated with the upper gas cavity, so that the gas in the upper gas cavity can enter the short gas nozzle 7 from the slot on the slotted sleeve 10. The sealing screw plug 11 is used for sealing the slotted sleeve 10 and cleaning the medium particles.

[0033] Further, the slot on the slotted sleeve 10 is towards the center of the lower distribution plate 4, which facilitates the gas in the middle gas cavity to enter the short gas nozzle 7 from the slot on the slotted sleeve 10.

[0034] A long sleeve 9 is fixed between the upper distribution plate 3 and the lower distribution plate 4, and the long gas nozzle 8 is screwed into the long sleeve 9. The long sleeve 9 is used for installing the long gas nozzle 8 and effectively isolating the lower gas cavity and the upper gas cavity.

[0035] In order to ensure sealing, the lower head 6 is fixed with a first sealing sleeve, the first gas inlet pipe 1 is sleeved in the first sealing sleeve, and one end of the first sealing sleeve is sealingly connected with the first gas inlet pipe 1. The first sealing sleeve can seal the gap between the lower head 6 and the first gas inlet pipe 1.

[0036] The lower head 6 is fixed with a second sealing sleeve, the second gas inlet pipe 2 is sleeved in the second sealing sleeve, and one end of the second sealing sleeve is sealingly connected with the second gas inlet pipe 2. The second sealing sleeve can seal the gap between the lower head 6 and the second gas inlet pipe 2.

[0037] Further, the outlet end of the short gas nozzle 7 and the long gas nozzle 8 is conical, and a plurality of gas outlets are arranged on the conical surface and the cylindrical surface of the short gas nozzle 7 and the long gas nozzle 8. After the gas enters the short gas nozzle 7 or the long gas nozzle 8, it is uniformly sprayed from the plurality of gas outlets on the conical surface and the cylindrical surface, so as to ensure that the gas is fully dispersed in the cylinder 5.

[0038] The present application is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the present application, but regardless of any changes in shape or structure, any technical solutions falling within the scope defined by the claims of the present application fall within the protection scope of the present application.

Claims

1. A new combined air inlet structure for fluidized bed, characterized in that: The utility model provides a kind of gas distribution device, including cylinder (5), the lower part of cylinder (5) is provided with lower head (6), upper distribution plate (3) and lower distribution plate (4) are installed in cylinder (5), first air inlet pipe (1) is connected on lower head (6), second air inlet pipe (2) is connected on lower distribution plate (4), and second air inlet pipe (2) extends from lower head (6);A plurality of short gas nozzles (7) are installed on the upper distribution plate (3), the cavity between the upper distribution plate (3) and the lower distribution plate (4) is communicated with the air inlet end of short gas nozzle (7), and the inner cavity of the cylinder (5) above the upper distribution plate (3) is communicated with the air outlet end of short gas nozzle (7);A plurality of long gas nozzles (8) are installed between the upper distribution plate (3) and the lower distribution plate (4), the cavity between the lower distribution plate (4) and the lower head (6) is communicated with the air inlet end of long gas nozzle (8), and the inner cavity of the cylinder (5) above the upper distribution plate (3) is communicated with the air outlet end of long gas nozzle (8); A plurality of long gas nozzles (8) and a plurality of short gas nozzles (7) except located in the center of the upper distribution plate (3) are arranged at intervals; The first air inlet pipe (1) is connected to the center of the lower head (6), and the second air inlet pipe (2) is connected to the center of the lower distribution plate (4); The air outlet end of the short gas nozzle (7) and the long gas nozzle (8) is conical, and a plurality of air outlet holes are arranged on the conical surface and the cylindrical surface of the short gas nozzle (7), and a plurality of air outlet holes are arranged on the conical surface and the cylindrical surface of the long gas nozzle (8); The shape of the upper distribution plate (3) and the lower distribution plate (4) is a downward convex curved surface.

2. A combined gas inlet structure for a fluidized bed according to claim 1, characterized in that: A center short sleeve (12) is fixed in the center of the upper distribution plate (3), and the short gas nozzle (7) in the center of the upper distribution plate (3) is connected in the center short sleeve (12).

3. A combined gas inlet structure for a fluidized bed according to claim 1, characterized in that: A slotted sleeve (10) is fixed between the upper distribution plate (3) and the lower distribution plate (4), the slotted sleeve (10) is slotted on a section between the upper distribution plate (3) and the lower distribution plate (4), the short gas nozzle (7) in the center of the upper distribution plate (3) is connected in the slotted sleeve (10), and the lower end of the slotted sleeve (10) is connected with a sealing plug (11).

4. A combined gas inlet structure for a fluidized bed according to claim 1, characterized in that: A long sleeve (9) is fixed between the upper distribution plate (3) and the lower distribution plate (4), and the long gas nozzle (8) is connected in the long sleeve (9).

5. A combined gas inlet structure for a fluidized bed according to claim 1, characterized in that: The lower head (6) is fixed with a first sealing sleeve, the first air inlet pipe (1) is sleeved in the first sealing sleeve, and one end of the first sealing sleeve is sealingly connected with the first air inlet pipe (1).

6. A combined gas inlet structure for a fluidized bed according to claim 1, characterized in that: The lower head (6) is fixed with a second sealing sleeve, the second air inlet pipe (2) is sleeved in the second sealing sleeve, and one end of the second sealing sleeve is sealingly connected with the second air inlet pipe (2).

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