Slag-leakage-proof bell-mounted air cap of circulating fluidized bed boiler

Abstract

The utility model discloses a slag-leakage-proof bell-mounted air cap for a circulating fluidized bed boiler, which relates to the technical field of air caps for circulating fluidized bed boilers and comprises a cap head, an air cap connecting pipe is mounted in the cap head, a sealing mechanism is mounted at the bottom of the air cap connecting pipe, and a connecting mechanism is mounted between the cap head and the air cap connecting pipe. The connecting mechanism comprises an upper connecting sleeve, the upper connecting sleeve is fixedly connected to one end of the cap head, and the bottom of the upper connecting sleeve is fixedly connected with a sealing ring. According to the air cap, the connecting bolt is rotated to enable the first connecting plate and the second connecting block to be connected in an attached mode, so that the upper connecting sleeve and the lower connecting sleeve are attached, meanwhile, the sealing ring is clamped into the clamping groove, and the effect that the cap head and the air cap connecting pipe are flexibly fixed and detached is achieved; the boiler hood is effectively fixed, the stability of the boiler hood is guaranteed, and ash leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wind caps for circulating fluidized bed boilers, and particularly relates to a slag-proof leakage bell-type circulating fluidized bed boiler wind cap. Background Technique

[0002] The slag-proof leakage bell-type circulating fluidized bed boiler wind cap is a specially designed boiler accessory, mainly used in circulating fluidized bed boilers to prevent slag leakage from the wind cap and maintain a stable fluidization state. This kind of wind cap usually has the characteristics of wear resistance and high temperature resistance, and can withstand the high temperature and wear environment during the operation of the boiler. Its structural forms may include directional wind caps and their improved forms, bell-type wind caps and their improved forms, etc. The specific design aims to prevent large particle deposition, generate reasonable resistance, and maintain uniform air distribution. In addition, the slag-proof leakage bell-type wind cap may also adopt special surface treatment processes and materials, such as Cr25Ni20, to enhance its wear resistance and high temperature resistance. In the market, this kind of wind cap is supplied by many professional manufacturers and can be customized and produced according to specific requirements;

[0003] Currently, the publicly disclosed patent No. CN214501204U discloses a slag-proof leakage device for a circulating fluidized bed boiler wind cap, including: an air duct mechanism, a primary wind cap, a primary counterweight cap top, a secondary wind cap, a secondary counterweight cap top, and a welding plate. The air duct mechanism is composed of a bottom air duct, a welding plate, a limit lug, and an upper air duct. The upper end of the bottom air duct is welded with a welding plate, and limit lugs are respectively arranged at the left end and the right end of the welding plate. Compared with the prior art, the utility model has the following beneficial effects: by setting the secondary wind cap, the air in the air duct passes through the air outlet chamber and the air outlet holes II on the secondary wind cap and does not contact the ash slag. At the same time, the lower end of the secondary wind cap is welded to the welding plate, which is more firm and will not fall off. The design of the primary wind cap prevents the ash slag from entering the primary wind cap, avoiding the backflow of ash slag and affecting the normal operation of the circulating fluidized bed boiler. The setting of the additional primary counterweight cap top makes the primary wind cap not easy to fall off.

[0004] In order to solve the problem of slag-proof leakage of the boiler wind cap, the prior art adopts the method of setting a secondary wind cap so that the air in the air duct passes through the air outlet chamber and the air outlet holes II on the secondary wind cap and does not contact the ash slag. However, there will still be situations where the fixed connection between the wind caps is not flexible and stable enough and the sealing performance of the wind cap is insufficient, resulting in the problems of ash slag leakage and short service life of the wind cap. Summary of the Invention

[0005] The purpose of the utility model is to provide a slag-proof leakage bell-type circulating fluidized bed boiler wind cap to solve the problems put forward in the above background technique.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A slag leakage-proof bell-type circulating fluidized bed boiler hood, comprising a hood head, a hood pipe is installed inside the hood head, a sealing mechanism is installed at the bottom of the hood pipe, and a connection mechanism is installed between the hood head and the hood pipe;

[0008] The connection mechanism comprises an upper connection sleeve, the upper connection sleeve is fixedly connected to one end of the cap head, and a sealing ring is fixedly connected to the bottom of the upper connection sleeve.

[0009] A further improvement of the technical solution of the utility model is that: a first connecting plate is fixedly connected to both sides of the upper connecting sleeve, and a connecting bolt is threadedly connected to the surface of the first connecting plate. By rotating the connecting bolt, the connecting bolt rotates so that the first connecting plate and the second connecting block are fitted and connected.

[0010] A further improvement of the technical solution of the utility model is that: the surface thread of the connecting bolt passes through a second connecting block, one end of the second connecting block is fixedly connected to a lower connecting sleeve, a groove is provided on the surface of the lower connecting sleeve, the upper connecting sleeve and the lower connecting sleeve are fitted together, and at the same time the sealing ring is snapped into the interior of the groove.

[0011] A further improvement of the technical solution of the utility model is that the sealing mechanism includes a through-lumen tube, the through-lumen tube is fixedly connected to one end of the hood connecting pipe, the surface of the through-lumen tube is fixedly connected with an external thread, the inner diameter of the through-lumen tube is 30 mm, and the insulation ring is specifically made of rock wool material to play a role in insulation.

[0012] A further improvement of the technical solution of the utility model is that: one end of the through-lumen tube is fixedly connected to a heat-insulating ring, one end of the heat-insulating ring is fixedly connected to a sealing ring, the upper surface of the sealing ring is fixedly connected to a support ring, and the heat-insulating ring is specifically made of rock wool material to play a heat-insulating role, thereby preventing the heat on the hood pipe from being transferred to the sealing ring, thereby avoiding damage to the sealing ring.

[0013] A further improvement of the technical solution of the utility model is that the hat head includes a hat body, the hat body is sleeved on one end of the hood pipe, a hat top is arranged on the top of the hat body, an inner cavity is opened inside the hat body, and air outlet holes are opened on the surface of the hat body, and the air outlet holes are used for exhaust ventilation.

[0014] A further improvement of the technical solution of the utility model is that the hood connecting pipe includes an inner core tube, which is sleeved inside the hood head, and the surface of the inner core tube is provided with a first exhaust hole and a second exhaust hole. The first exhaust hole and the second exhaust hole are provided to prevent the wind speed from being too fast to be diverted and impacting the top of the hood head to cause the hood body and the inner core tube to fall off.

[0015] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0016] The utility model provides a slag leakage-proof bell-mounted circulating fluidized bed boiler hood. When the hood head needs to be fixed to the hood pipe, the connecting bolt is rotated so that the first connecting plate and the second connecting block are fitted and connected, thereby making the upper connecting sleeve fit with the lower connecting sleeve. At the same time, the sealing ring is clamped into the interior of the clamping groove, thereby achieving the effect of flexibly fixing and disassembling the hood head and the hood pipe, effectively fixing the boiler hood, ensuring the stability of the boiler hood, and preventing ash leakage.

[0017] The utility model provides a slag leakage-proof bell-type circulating fluidized bed boiler hood, the inner diameter of the through-cavity pipe is 30mm, the heat insulation ring is made of rock wool material, which plays a heat insulation role and avoids the heat on the hood pipe to be transferred to the sealing ring, thereby avoiding the damage of the sealing ring and the occurrence of air leakage. It is made of stainless steel material to avoid rust and is conducive to extending the service life of the hood. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the structure of the hood pipe of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the connection mechanism of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the sealing mechanism of the utility model;

[0022] Figure 5 The figure is a structural schematic diagram of a cap head of the utility model.

[0023] In the figure: 1. hat head; 10. hat body; 11. hat top; 12. inner cavity; 13. air outlet; 2. connecting mechanism; 20. upper connecting sleeve; 21. sealing ring; 22. lower connecting sleeve; 23. slot; 24. first connecting plate; 25. second connecting block; 26. connecting bolt; 3. hood connecting pipe; 30. inner core tube; 31. first air outlet; 32. second air outlet; 4. sealing mechanism; 40. support ring; 41. sealing ring; 42. heat insulation ring; 43. external thread; 44. through cavity tube. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the embodiments: Example

[0025] like Figures 1-5As shown, the utility model provides a slag leakage-proof bell-type circulating fluidized bed boiler hood, including a hood head 1, a hood pipe 3 is installed inside the hood head 1, a sealing mechanism 4 is installed at the bottom of the hood pipe 3, a connection mechanism 2 is installed between the hood head 1 and the hood pipe 3, the connection mechanism 2 includes an upper connection sleeve 20, the upper connection sleeve 20 is fixedly connected to one end of the hood head 1, a sealing ring 21 is fixedly connected to the bottom of the upper connection sleeve 20, first connection plates 24 are fixedly connected to both sides of the upper connection sleeve 20, a connection bolt 26 is threadedly connected to the surface of the first connection plate 24, a second connection block 25 is threadedly penetrated by the surface of the connection bolt 26, a lower connection sleeve 22 is fixedly connected to one end of the second connection block 25, and a card slot 23 is opened on the surface of the lower connection sleeve 22;

[0026] Specifically, when it is necessary to fix the cap head 1 and the hood pipe 3, the connecting bolt 26 is rotated, and the connecting bolt 26 is rotated to make the first connecting plate 24 and the second connecting block 25 fit together, so that the upper connecting sleeve 20 and the lower connecting sleeve 22 fit together. At the same time, the sealing ring 21 is snapped into the interior of the slot 23, so as to achieve the effect of flexibly fixing and disassembling the cap head 1 and the hood pipe 3, effectively fix the boiler hood, ensure the stability of the boiler hood, and prevent ash leakage. Example

[0027] like Figures 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the sealing mechanism 4 includes a through-cavity tube 44, the through-cavity tube 44 is fixedly connected to one end of the hood pipe 3, the surface of the through-cavity tube 44 is fixedly connected with an external thread 43, one end of the through-cavity tube 44 is fixedly connected with a heat insulation ring 42, one end of the heat insulation ring 42 is fixedly connected with a sealing ring 41, and the upper surface of the sealing ring 41 is fixedly connected with a support ring 40, the cap head 1 includes a cap body 10, the cap body 10 is sleeved on one end of the hood pipe 3, the top of the cap body 10 is provided with a cap top 11, the interior of the cap body 10 is provided with an inner cavity 12, the surface of the cap body 10 is provided with an air outlet hole 13, the hood pipe 3 includes an inner core tube 30, the inner core tube 30 is sleeved inside the cap head 1, and the surface of the inner core tube 30 is provided with a first exhaust hole 31 and a second exhaust hole 32;

[0028] Specifically, the inner diameter of the through-cavity tube 44 is 30 mm, and the heat-insulating ring 42 is made of rock wool material to play a heat-insulating role, thereby preventing the heat on the hood pipe 3 from being transferred to the sealing ring 41, thereby preventing the sealing ring 41 from being damaged and air leakage from occurring. It is made of stainless steel material to avoid rust, which is beneficial to extending the service life of the hood. A first air outlet hole 31 and a second air outlet hole 32 are provided to prevent the wind speed from being too fast to be diverted and impacting the top of the hood head 1 to cause the hood body 10 and the inner core tube 30 to fall off.

[0029] The working principle of the anti-leakage slag bell-mounted circulating fluidized bed boiler hood is described in detail below.

[0030] like Figures 1-5 As shown, when it is necessary to fix the cap head 1 and the hood pipe 3, the connecting bolt 26 is rotated, and the connecting bolt 26 rotates to make the first connecting plate 24 and the second connecting block 25 fit together, so that the upper connecting sleeve 20 and the lower connecting sleeve 22 fit together. At the same time, the sealing ring 21 is connected to the inside of the card slot 23, so as to achieve the effect of flexibly fixing and disassembling the cap head 1 and the hood pipe 3, effectively fix the boiler hood, ensure the stability of the boiler hood, and prevent ash from leaking out. The inner diameter of the through-cavity tube 44 is 30mm, and the insulation ring 42 is specifically made of rock wool material, which plays a role of insulation, avoids the heat on the hood pipe 3 from being transferred to the sealing ring 41, thereby avoiding the damage of the sealing ring 41 and avoiding the occurrence of air leakage. It is made of stainless steel material to avoid rust, which is beneficial to prolonging the service life of the hood. A first exhaust hole 31 and a second exhaust hole 32 are provided to prevent the wind speed from being too fast to be diverted, and the impact on the top of the cap head 1 causes the cap body 10 and the inner core tube 30 to fall off.

[0031] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A slag-proof bell-type circulating fluidized bed boiler air cap, comprising a cap head (1), characterized in that: A hood pipe (3) is installed inside the cap head (1), a sealing mechanism (4) is installed at the bottom of the hood pipe (3), and a connection mechanism (2) is installed between the cap head (1) and the hood pipe (3); The connection mechanism (2) comprises an upper connection sleeve (20), wherein the upper connection sleeve (20) is fixedly connected to one end of the cap head (1), and a sealing ring (21) is fixedly connected to the bottom of the upper connection sleeve (20).

2. The air cap of a slag-proof bell-type circulating fluidized bed boiler according to claim 1, characterized in that: First connecting plates (24) are fixedly connected to both sides of the upper connecting sleeve (20), and connecting bolts (26) are threadedly connected to the surface of the first connecting plate (24).

3. The wind cap of a slag-proof bell-type circulating fluidized bed boiler according to claim 2, characterized in that: The surface of the connecting bolt (26) is threaded with a second connecting block (25), one end of the second connecting block (25) is fixedly connected to a lower connecting sleeve (22), and a clamping groove (23) is provided on the surface of the lower connecting sleeve (22).

4. A wind cap for a slag-proof bell-type circulating fluidized bed boiler according to claim 1, characterized in that: The sealing mechanism (4) comprises a through-cavity tube (44), the through-cavity tube (44) being fixedly connected to one end of the hood connecting pipe (3), and an external thread (43) being fixedly connected to the surface of the through-cavity tube (44).

5. A slag-proof bell-type circulating fluidized bed boiler air cap according to claim 4, characterized in that: One end of the through-lumen tube (44) is fixedly connected to a heat-insulating ring (42), one end of the heat-insulating ring (42) is fixedly connected to a sealing ring (41), and the upper surface of the sealing ring (41) is fixedly connected to a support ring (40).

6. The wind cap of a slag-proof bell-type circulating fluidized bed boiler according to claim 1, characterized in that: The hat head (1) comprises a hat body (10), wherein the hat body (10) is sleeved on one end of a hood pipe (3), a hat top (11) is arranged on the top of the hat body (10), an inner cavity (12) is provided inside the hat body (10), and an air outlet hole (13) is provided on the surface of the hat body (10).

7. A wind cap for a slag-proof bell-type circulating fluidized bed boiler according to claim 1, characterized in that: The hood pipe (3) comprises an inner core tube (30), the inner core tube (30) is sleeved inside the hood head (1), and a first air exhaust hole (31) and a second air exhaust hole (32) are formed on the surface of the inner core tube (30).

Images