Fluidized bed furnace with large air cap opening

Abstract

The utility model relates to the technical field of fluidized bed furnaces, in particular to a fluidized bed furnace with a large air cap opening, which comprises an outer furnace body and an inner furnace body arranged in the outer furnace body, an air cap is arranged at the top of the inner furnace body, and the air cap comprises a lower cap body communicated with the inside of the inner furnace body. A plurality of vertically-arranged strip-shaped holes are formed in the outer wall of the circumference of the lower cap body, the opening degrees of the strip-shaped holes are gradually increased from bottom to top, an upper cap body is arranged on the outer side of the lower cap body, the upper cap body and the lower cap body are connected in an up-down sliding mode, and a plurality of ventilation holes are formed in the outer wall of the circumference of the upper cap body. The inner furnace body is mainly characterized in that the air cap is arranged at the top of the inner furnace body, and due to the special air cap structural design, a larger ventilation area can be provided when the pressure of the inner furnace body is high, so that it is guaranteed that pressure-released airflow can be rapidly discharged, and the safety of the inner furnace body in the using process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed boilers, and particularly relates to a fluidized bed boiler with large tuyere caps having openings. Background Technique

[0002] In the technical field of fluidized bed boilers, the traditional design of fluidized bed boilers has certain limitations in dealing with gas flow and furnace pressure control. These limitations may lead to problems such as poor gas flow in the furnace, unstable pressure, and potential safety hazards. To solve these problems, innovative designs are needed for the key components of the fluidized bed boiler, especially the tuyere cap part, which plays a crucial role in controlling the gas flow and pressure in the furnace.

[0003] Gas flow control problem: The traditional design of the tuyere cap of the fluidized bed boiler may not be able to provide flexible adjustment of the ventilation area when the pressure in the inner furnace changes. When the pressure in the furnace increases, if the ventilation area of the tuyere cap cannot increase accordingly, it may lead to poor gas flow discharge, thereby affecting the combustion efficiency and temperature control in the furnace.

[0004] Safety hazard: If the pressure in the furnace cannot be released in a timely and effective manner, it may cause damage to the furnace body and even trigger safety accidents. Therefore, a tuyere cap design that can automatically increase the ventilation area when the pressure rises is needed to ensure the safe operation of the furnace. In view of this, we propose a fluidized bed boiler with large tuyere caps having openings. Content of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides a fluidized bed boiler with large tuyere caps having openings.

[0006] The technical solution of the utility model is as follows:

[0007] A fluidized bed boiler with large tuyere caps having openings includes an outer furnace body and an inner furnace body installed inside the outer furnace body. A tuyere cap is installed at the top of the inner furnace body. The tuyere cap includes a lower cap body that is in communication with the inside of the inner furnace body. A plurality of vertically arranged strip-shaped holes are opened on the circumferential outer wall of the lower cap body, and the opening degree of the strip-shaped holes gradually increases from bottom to top. An upper cap body is provided outside the lower cap body, and the upper cap body is slidably connected to the lower cap body up and down. A plurality of ventilation holes are opened on the circumferential outer wall of the upper cap body, and the plurality of ventilation holes are respectively aligned with the strip-shaped holes, and the diameter of the ventilation holes is equal to the width of the strip-shaped holes at the maximum opening degree.

[0008] As a preferred technical solution, a connecting rod is fixedly connected to the inner wall of the top of the upper cap body. Two limiting rods are integrally formed symmetrically at the bottom of the connecting rod. Two limiting chutes are symmetrically opened on the inner wall of the lower cap body. One ends of the two limiting rods away from the connecting rod are respectively slidably connected to the two limiting chutes.

[0009] As a preferred technical solution, a feeding pipe is fixed at the top of the inner furnace body, and a discharging pipe is fixed at a position close to the bottom of the outer wall. Both the feeding pipe and the discharging pipe extend to the outside of the outer furnace body, and valves are installed on both of them.

[0010] As a preferred technical solution, it further includes a separately provided combustion chamber. The interior of the combustion chamber is divided by a filter screen into a ventilation chamber located in the upper part and a combustion chamber located in the lower part. Two chamber doors are symmetrically and hingedly installed outside the combustion chamber on the outside of the combustion chamber.

[0011] As a preferred technical solution, an air delivery pipe communicating with the inside of the outer furnace body is installed on an outer wall on one side of the ventilation chamber of the combustion chamber. A blower is installed on the air delivery pipe. An air inlet pipe is installed on an outer wall on the side of the ventilation chamber of the combustion chamber away from the air delivery pipe, and a check valve is installed on the air inlet pipe.

[0012] As a preferred technical solution, a return air pipe is installed near the top of the outer furnace body. The return air pipe communicates with the inside of the ventilation chamber, and an air pump is installed on the return air pipe.

[0013] As a preferred technical solution, at least three legs distributed in a circular array are fixedly installed at the bottom of the outer furnace body.

[0014] As a preferred technical solution, the height of the limit sliding groove is greater than the length of the strip-shaped hole.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The main feature of the present utility model lies in the design of the wind cap installed at the top of the inner furnace body. The wind cap is composed of a lower cap body and an upper cap body. The lower cap body communicates with the inside of the inner furnace body, and a number of vertically arranged strip-shaped holes are opened on its circumferential outer wall. The openings of these strip-shaped holes gradually increase from bottom to top. The upper cap body is slidably connected to the lower cap body up and down, and a number of ventilation holes are opened on its circumferential outer wall. These ventilation holes are aligned with the strip-shaped holes, and the diameter of the ventilation holes is equal to the width of the strip-shaped hole at the maximum opening. This special wind cap structure design can provide a larger ventilation area when the pressure in the inner furnace body is high, so as to ensure that the air flow for pressure relief can be quickly discharged, and ensure the safety of the inner furnace body during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the outer furnace body of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the wind cap of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the combustion chamber in the present utility model;

[0021] The meanings of the various labels in the figure are as follows:

[0022] 1. Outer furnace body; 2. Wind cap; 20. Upper cap body; 200. Ventilation holes; 201. Connecting rod; 202. Limiting rod; 21. Lower cap body; 210. Strip-shaped holes; 211. Limiting sliding grooves; 3. Inner furnace body; 30. Feeding pipe; 31. Discharge pipe; 4. Legs; 5. Return air pipe; 50. Air pump; 6. Combustion chamber; 60. Chamber door; 61. Gas transmission pipe; 62. Blower; 63. Air inlet pipe; 64. Filter screen; 65. Combustion chamber; 66. Ventilation chamber. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 - 4 , the present utility model provides a technical solution:

[0025] A fluidized bed furnace with large wind cap openings includes an outer furnace body 1 and an inner furnace body 3 installed inside the outer furnace body 1. A wind cap 2 is installed at the top of the inner furnace body 3. The wind cap 2 includes a lower cap body 21 communicating with the inside of the inner furnace body 3. A plurality of vertically arranged strip-shaped holes 210 are opened on the circumferential outer wall of the lower cap body 21, and the opening degree of the strip-shaped holes 210 gradually increases from bottom to top. An upper cap body 20 is arranged outside the lower cap body 21, and the upper cap body 20 is slidably connected to the lower cap body 21 up and down. A plurality of ventilation holes 200 are opened on the circumferential outer wall of the upper cap body 20, and the plurality of ventilation holes 200 are respectively aligned with the strip-shaped holes 210, and the diameter of the ventilation holes 200 is equal to the width of the strip-shaped holes 210 at the maximum opening degree. The main feature of this device lies in the design of the wind cap 2 installed at the top of the inner furnace body 3. The wind cap 2 is composed of a lower cap body 21 and an upper cap body 20. The lower cap body 21 communicates with the inside of the inner furnace body 3, and a plurality of vertically arranged strip-shaped holes 210 are opened on its circumferential outer wall, and the opening degree of these strip-shaped holes 210 gradually increases from bottom to top. The upper cap body 20 is slidably connected to the lower cap body 21 up and down, and a plurality of ventilation holes 200 are opened on its circumferential outer wall, and these ventilation holes 200 are aligned with the strip-shaped holes 210, and the diameter of the ventilation holes 200 is equal to the width of the strip-shaped holes 210 at the maximum opening degree. This special structural design of the wind cap 2 can provide a larger ventilation area when the pressure in the inner furnace body 3 is high, so as to ensure that the air flow for pressure relief can be quickly discharged, and ensure the safety of the inner furnace body 3 during use.

[0026] Preferably, in this embodiment, a connecting rod 201 is fixedly connected to the inner wall of the top of the upper cap body 20. Two limiting rods 202 are integrally formed symmetrically at the bottom of the connecting rod 201. Two limiting chutes 211 are symmetrically formed on the inner wall of the lower cap body 21. One ends of the two limiting rods 202 away from the connecting rod 201 are respectively slidably connected to the two limiting chutes 211. This design enables the upper cap body 20 to slide stably on the lower cap body 21, further adjusting the alignment degree of the ventilation holes 200 and the strip-shaped holes 210, so as to more precisely control the air flow in the furnace.

[0027] Preferably, in this embodiment, a feeding pipe 30 is fixed to the top of the inner furnace body 3, and a discharging pipe 31 is fixed to the outer wall near the bottom. Both the feeding pipe 30 and the discharging pipe 31 extend to the outside of the outer furnace body 1, and valves are installed on both of them. The design of the feeding pipe 30 and the discharging pipe 31 fixed to the top of the inner furnace body 3 makes the feeding and discharging operations more convenient. And by installing valves, it is convenient to control the addition and discharge of materials, improving the operation flexibility and the use efficiency of the furnace.

[0028] Preferably, in this embodiment, it further includes a separately provided combustion chamber 6. The inside of the combustion chamber 6 is divided by a filter screen 64 into a ventilation chamber 66 located in the upper part and a combustion chamber 65 located in the lower part. Two chamber doors 60 are symmetrically hinged and installed outside the combustion chamber 6 at the outside of the combustion chamber 65. An air delivery pipe 61 communicating with the inside of the outer furnace body 1 is installed on the outer wall of the combustion chamber 6 on one side of the ventilation chamber 66. A blower 62 is installed on the air delivery pipe 61. An air inlet pipe 63 is installed on the outer wall of the combustion chamber 6 on the side of the ventilation chamber 66 away from the air delivery pipe 61. A check valve is installed on the air inlet pipe 63. The design of the combustion chamber 6 separates the ventilation chamber 66 and the combustion chamber 65 through the filter screen 64, ensuring the stability and efficiency of combustion. At the same time, the provision of the air delivery pipe 61 and the air inlet pipe 63, as well as the installation of the blower 62 and the check valve, further ensure the smoothness and stability of the air flow in the furnace.

[0029] Preferably, in this embodiment, a return air pipe 5 is installed near the top of the outer furnace body 1. The return air pipe 5 communicates with the inside of the ventilation chamber 66, and an air pump 50 is installed on the return air pipe 5. The design of the return air pipe 5 and the air pump 50 helps the circulation and reuse of the gas in the furnace, improving the energy utilization efficiency.

[0030] Preferably, in this embodiment, at least three legs 4 are fixedly installed at the bottom of the outer furnace body 1 and are distributed in a circular array. The design of the legs 4 enables the fluidized bed furnace to be stably placed on the ground, ensuring the stability and safety of the furnace.

[0031] Preferably, in this embodiment, the height of the limit sliding groove 211 is greater than the length of the strip-shaped hole 210. The design that the height of the limit sliding groove 211 is greater than the length of the strip-shaped hole 210 ensures that the upper cap body 20 will not break away from the lower cap body 21 during the sliding process, further enhancing the structural stability and use safety of the furnace.

[0032] When the fluidized bed furnace with large wind cap openings of the present utility model is in use, it specifically includes:

[0033] Working principle of the wind cap 2

[0034] Structure of the wind cap 2: The wind cap 2 is composed of a lower cap body 21 and an upper cap body 20. The lower cap body 21 is communicated with the inner furnace body 3, and the upper cap body 20 is slidably connected to the lower cap body 21. A strip-shaped hole 210 is formed in the lower cap body 21, and a ventilation hole 200 is formed in the upper cap body 20. The two are aligned to control the air flow.

[0035] Air flow control: When the pressure in the inner furnace body 3 increases, the upper cap body 20 will slide relative to the lower cap body 21, increasing the alignment area between the ventilation hole 200 and the strip-shaped hole 210, thereby providing more ventilation area to ensure that the pressure-relieving air flow can be quickly discharged and ensuring the safety of the inner furnace body 3 during use.

[0036] Working principle of combustion and circulation

[0037] Combustion process: Raw materials are added into the inner furnace body 3 through the feeding pipe 30. Raw coal is burned in the combustion chamber 65, and the blower 62 is started. The blower 62 sends high-temperature gas into the outer furnace body 1, and the high-temperature gas in the outer furnace body 1 heats the inner furnace body 3, so that the raw materials in the inner furnace body 3 are heated to boiling.

[0038] Gas circulation: The gas in the outer furnace body 1 is recycled through the return pipe 5 and the air pump 50, further reducing energy consumption.

[0039] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed boiler with an opening in a large wind cap, comprising an outer furnace body (1) and an inner furnace body (3) installed inside the outer furnace body (1), characterized in that: A wind cap (2) is installed at the top of the inner furnace body (3). The wind cap (2) includes a lower cap body (21) communicating with the inside of the inner furnace body (3). A plurality of vertically arranged strip-shaped holes (210) are formed in the circumferential outer wall of the lower cap body (21). The opening degree of the strip-shaped holes (210) gradually increases from bottom to top. An upper cap body (20) is arranged outside the lower cap body (21). The upper cap body (20) is slidably connected with the lower cap body (21) up and down. A plurality of ventilation holes (200) are formed in the circumferential outer wall of the upper cap body (20). The plurality of ventilation holes (200) are respectively aligned with the strip-shaped holes (210), and the diameter of the ventilation holes (200) is equal to the width of the strip-shaped holes (210) at the maximum opening degree.

2. The fluidized bed boiler with a large wind cap opening according to claim 1, characterized in that: A connecting rod (201) is fixedly connected to the inner wall of the top of the upper cap body (20). Two limiting rods (202) are integrally formed symmetrically at the bottom of the connecting rod (201). Two limiting chutes (211) are symmetrically formed in the inner wall of the lower cap body (21). The ends of the two limiting rods (202) far away from the connecting rod (201) are respectively slidably connected with the two limiting chutes (211).

3. The fluidized bed boiler with a large wind cap having openings as claimed in claim 2, wherein: A feeding pipe (30) is fixed at the top of the inner furnace body (3), and a discharging pipe (31) is fixed at the outer wall near the bottom of the inner furnace body (3). The feeding pipe (30) and the discharging pipe (31) both extend to the outside of the outer furnace body (1), and valves are installed on both of them.

4. The fluidized bed boiler with a large wind cap having openings as claimed in claim 3, wherein: It further includes a separately arranged combustion chamber (6). The inside of the combustion chamber (6) is divided into a ventilation chamber (66) located in the upper part and a combustion chamber (65) located in the lower part by a filter screen (64). Two chamber doors (60) are symmetrically hinged and installed outside the combustion chamber (6) at the position of the combustion chamber (65).

5. The fluidized bed boiler with a large wind cap opening according to claim 4, characterized in that: An air delivery pipe (61) communicating with the inside of the outer furnace body (1) is installed on the outer wall of the combustion chamber (6) on one side of the ventilation chamber (66). A blower (62) is installed on the air delivery pipe (61). An air inlet pipe (63) is installed on the outer wall of the combustion chamber (6) on the side of the ventilation chamber (66) far away from the air delivery pipe (61). A check valve is installed on the air inlet pipe (63).

6. The fluidized bed boiler with a large wind cap opening according to claim 5, characterized in that: A return air pipe (5) is installed near the top of the outer furnace body (1). The return air pipe (5) is internally communicated with the ventilation chamber (66), and an air pump (50) is installed on the return air pipe (5).

7. The fluidized bed boiler with a large wind cap having openings as claimed in claim 6, wherein: At least three legs (4) distributed in a circular array are fixedly installed at the bottom of the outer furnace body (1).

8. The fluidized bed boiler with a large wind cap having openings as claimed in claim 7, wherein: The height of the limiting chute (211) is greater than the length of the strip-shaped hole (210).

Images