A high-efficiency and energy-saving circulating fluidized bed boiler

Abstract

The utility model discloses a highly efficient and energy-saving circulating fluidized bed boiler, which relates to the technical field of fluidized bed boilers, and includes a boiler body and a spiral pipe, wherein the side wall of the boiler body is fixedly sleeved with two smoke outlet pipes, and the side wall of the spiral pipe is fixedly provided with a spiral heat-conducting sheet, which is fixedly wound around the outer wall of the boiler body, and the outer wall of the boiler body is fixedly sleeved with a heat insulation cover, and the spiral pipe and the spiral heat-conducting sheet are both arranged inside the heat insulation cover. The utility model uses the spiral pipe, the spiral heat-conducting sheet and the heat insulation cover to provide an air supply mechanism to smoothly transport the exhaust gas of the boiler body to the inside of the spiral pipe, and the exhaust gas has a relatively high heat content, and the spiral pipe can transfer the heat to the inside of the spiral heat-conducting sheet, thereby heating the boiler body, and the heat insulation cover can prevent the heat from being dissipated, thereby further improving the heat transfer effect, further strengthening the heating effect of the boiler body, and realizing energy reuse.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed boilers, in particular to a high-efficiency and energy-saving circulating fluidized bed boiler. Background Art

[0002] Coal is the main energy source in my country, and its main utilization method is coal-fired power generation. Pollutants such as NOx, SO2 and smoke produced by coal combustion seriously pollute the atmosphere, and NOx and SO2 are the main sources of pollution such as acid rain and photochemical smog.

[0003] After searching, an improved low-nitrogen, high-efficiency, energy-saving, high-temperature and high-pressure circulating fluidized bed boiler with publication number CN214064898U is found, which includes a furnace, a secondary air system, an in-furnace ammonia spraying and denitrification system, a conveying pipeline, a return system, a tail flue, a superheater, an economizer, a preheater, an outlet flue, an adjustable cleaning box structure, an auxiliary observation and inspection window structure and a standing workbench structure. The secondary air system is bolted on the right side of the lower end of the furnace; the in-furnace ammonia spraying and denitrification system is bolted on the upper right side inside the furnace; one end of the conveying pipeline is bolted to the upper end of the in-furnace ammonia spraying and denitrification system, and the other end is bolted to the tail flue; the return system is bolted between the lower right side of the furnace and the lower end of the in-furnace ammonia spraying and denitrification system.

[0004] However, the existing improved low-nitrogen, high-efficiency and energy-saving high-temperature and high-pressure circulating fluidized bed boiler has certain disadvantages when in use. Although the device can improve the combustion effect of the boiler, the boiler exhaust gas has a high heat content, and the device is difficult to convert and utilize the heat in the exhaust gas, making it difficult to achieve energy reuse. Utility Model Content

[0005] In view of the problems existing in the above-mentioned existing improved low-nitrogen, high-efficiency and energy-saving high-temperature and high-pressure circulating fluidized bed boiler, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-efficiency and energy-saving circulating fluidized bed boiler, which solves the problem that although the device can improve the combustion effect of the boiler, the boiler exhaust gas has a high heat content, and the device is difficult to convert and utilize the heat in the exhaust gas, thereby making it difficult to achieve energy reuse.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A high-efficiency and energy-saving circulating fluidized bed boiler comprises a boiler body and a spiral tube, wherein two smoke outlet pipes are fixedly sleeved on the side wall of the boiler body, a spiral heat conductive sheet is fixedly arranged on the side wall of the spiral tube, and the spiral heat conductive sheet is fixedly wound around the outer wall of the boiler body, a heat insulation cover is fixedly sleeved on the outer wall of the boiler body, the spiral tube and the spiral heat conductive sheet are both arranged inside the heat insulation cover, an air supply mechanism is arranged on the outer wall of the boiler body, and the smoke outlet pipe and the spiral tube are matched with the air supply mechanism.

[0009] Preferably, the air supply mechanism includes a hollow air collecting plate, an air pump, a first duct and a second duct. The hollow air collecting plate is fixedly arranged on the top of the boiler body by a plurality of fixing rods, and the air pump is fixedly arranged on the outer wall of the boiler body by a mounting frame. One end of the smoke outlet pipe passes through the interior of the hollow air collecting plate and is fixedly connected to the hollow air collecting plate, one end of the first duct and the second duct are fixedly connected to the air inlet end and the air outlet end of the air pump, respectively, and the other ends of the first duct and the second duct are fixedly sleeved on the interior of the hollow air collecting plate and the spiral tube, respectively.

[0010] Preferably, two support plates are fixedly provided on the inner wall of the hollow gas collecting plate, a filter plate is placed on the top of the two support plates, and the smoke outlet pipe and the first guide tube are respectively provided on both sides of the filter plate.

[0011] Preferably, a tail smoke pipe is fixedly sleeved on the tube wall of the spiral tube, one end of the tail smoke pipe penetrates into the interior of the boiler body and is fixedly connected to the boiler body, and a gas one-way valve is rotatably provided on the tube wall of the tail smoke pipe.

[0012] Preferably, the spiral heat conductive sheet is a copper sheet.

[0013] Preferably, a plurality of screw rods are movably sleeved on the side wall of the filter plate, and the other end of each screw rod is threadedly sleeved on the side wall of the corresponding support plate.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. In the utility model, the air supply mechanism smoothly delivers the exhaust gas of the boiler body to the inside of the spiral pipe through the spiral pipe, the spiral heat conductive sheet and the heat insulating cover. The exhaust gas has a relatively high heat content, and the spiral pipe can transfer the heat to the inside of the spiral heat conductive sheet, thereby heating the boiler body. The heat insulating cover can prevent the heat from dissipating, thereby further improving the heat transfer effect, further strengthening the heating effect of the boiler body, and realizing energy reuse.

[0016] 2. The utility model provides an air supply mechanism, which includes a hollow air collecting plate, an air pump, a first conduit and a second conduit. When the air pump is started, the first conduit can smoothly draw the hot air inside the hollow air collecting plate into the inside of the second conduit, thereby smoothly transporting the hot air to the inside of the spiral tube.

[0017] 3. The utility model, through the filter plate, the inner wall of the hollow gas collecting plate is fixedly provided with two support plates, the filter plate is placed on the top of the two support plates, the smoke outlet pipe and the first duct are respectively located on both sides of the filter plate, so that the exhaust gas discharged from the boiler body can be filtered to prevent impurities from clogging the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 For the utility model Figure 1 A schematic diagram of the cross-sectional structure of a spiral tube;

[0021] Figure 3 It is a rear cross-sectional structural schematic diagram of the utility model;

[0022] Figure 4 For the utility model Figure 2 Enlarged view of part A.

[0023] Description of reference numerals:

[0024] 1. Boiler body; 2. Spiral tube; 3. Smoke outlet pipe; 4. Spiral heat conducting plate; 5. Heat insulation cover; 6. Hollow gas collecting plate; 7. Air pump; 8. First conduit; 9. Second conduit; 10. Support plate; 11. Filter plate; 12. Tail smoke pipe; 13. One-way valve; 14. Screw. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model embodiment discloses a high-efficiency and energy-saving circulating fluidized bed boiler.

[0027] The utility model provides Figure 1-3A high-efficiency and energy-saving circulating fluidized bed boiler shown in the figure comprises a boiler body 1 and a spiral tube 2. Two smoke outlet pipes 3 are fixedly sleeved on the side wall of the boiler body 1. A spiral heat conductive sheet 4 is fixedly arranged on the side wall of the spiral tube 2. The spiral heat conductive sheet 4 is fixedly arranged around the outer wall of the boiler body 1. A heat insulating cover 5 is fixedly sleeved on the outer wall of the boiler body 1. The spiral tube 2 and the spiral heat conductive sheet 4 are both arranged inside the heat insulating cover 5. An air supply mechanism is arranged on the outer wall of the boiler body 1. The smoke outlet pipe 3 and the spiral tube 2 are both matched with the air supply mechanism.

[0028] In order to smoothly transport the hot gas to the interior of the spiral tube 2, Figure 1-4 As shown, the air supply mechanism includes a hollow air collecting plate 6, an air pump 7, a first duct 8 and a second duct 9. The hollow air collecting plate 6 is fixedly arranged on the top of the boiler body 1 by a plurality of fixing rods, and the air pump 7 is fixedly arranged on the outer wall of the boiler body 1 by a mounting frame. One end of the smoke outlet pipe 3 passes through the interior of the hollow air collecting plate 6 and is fixedly connected to the hollow air collecting plate 6. One end of the first duct 8 and the second duct 9 are fixedly connected to the air inlet end and the air outlet end of the air pump 7, respectively. The other ends of the first duct 8 and the second duct 9 are fixedly sleeved on the interior of the hollow air collecting plate 6 and the spiral tube 2, respectively.

[0029] In order to filter the exhaust gas discharged from the boiler body 1 and prevent impurities from clogging the pipe body, Figure 1-4 As shown, two support plates 10 are fixedly arranged on the inner wall of the hollow gas collecting plate 6, a filter plate 11 is placed on the top of the two support plates 10, and the smoke outlet pipe 3 and the first conduit 8 are respectively arranged on both sides of the filter plate 11.

[0030] In order to discharge the heated tail gas smoothly into the boiler body 1 and realize the third use of heat, Figure 1-3 As shown, the spiral tube 2 has a tail smoke pipe 12 fixedly sleeved on its wall, one end of which penetrates into the boiler body 1 and is fixedly connected to the boiler body 1 , and a gas one-way valve 13 is rotatably provided on the wall of the tail smoke pipe 12 .

[0031] In order to ensure that the spiral heat conducting sheet 4 has a high heat conducting effect, Figure 2 As shown, the spiral heat conducting sheet 4 is a copper sheet.

[0032] Finally, in order to achieve smooth installation and removal of the filter plate 10, as Figure 4 As shown, a plurality of screw rods 14 are movably sleeved on the side wall of the filter plate 11 , and the other end of each screw rod 14 is threadedly sleeved on the side wall of the corresponding support plate 10 .

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency and energy-saving circulating fluidized bed boiler, comprising a boiler body (1) and a spiral tube (2), characterized in that: Two smoke outlet pipes (3) are fixedly sleeved on the side wall of the boiler body (1); a spiral heat conductive sheet (4) is fixedly arranged on the side wall of the spiral tube (2); the spiral heat conductive sheet (4) is fixedly arranged around the outer wall of the boiler body (1); a heat insulating cover (5) is fixedly sleeved on the outer wall of the boiler body (1); the spiral tube (2) and the spiral heat conductive sheet (4) are both arranged inside the heat insulating cover (5); an air supply mechanism is arranged on the outer wall of the boiler body (1); and the smoke outlet pipe (3) and the spiral tube (2) are both matched with the air supply mechanism.

2. The high-efficiency and energy-saving circulating fluidized bed boiler according to claim 1, characterized in that: The air supply mechanism comprises a hollow air collecting plate (6), an air pump (7), a first conduit (8) and a second conduit (9); the hollow air collecting plate (6) is fixedly arranged on the top of the boiler body (1) by a plurality of fixing rods; the air pump (7) is fixedly arranged on the outer wall of the boiler body (1) by a mounting frame; one end of the smoke outlet pipe (3) passes through the interior of the hollow air collecting plate (6) and is fixedly connected to the hollow air collecting plate (6); one end of the first conduit (8) and the second conduit (9) are respectively fixedly connected to the air inlet end and the air outlet end of the air pump (7); the other ends of the first conduit (8) and the second conduit (9) are respectively fixedly sleeved on the interior of the hollow air collecting plate (6) and the spiral tube (2).

3. The high-efficiency and energy-saving circulating fluidized bed boiler according to claim 2, characterized in that: Two support plates (10) are fixedly arranged on the inner wall of the hollow gas collecting plate (6), a filter plate (11) is placed on the top of the two support plates (10), and the smoke outlet pipe (3) and the first guide tube (8) are respectively arranged on both sides of the filter plate (11).

4. The high-efficiency and energy-saving circulating fluidized bed boiler according to claim 1, characterized in that: The wall of the spiral tube (2) is fixedly sleeved with a tail smoke pipe (12), one end of the tail smoke pipe (12) penetrates into the interior of the boiler body (1) and is fixedly connected to the boiler body (1), and the wall of the tail smoke pipe (12) is rotatably provided with a gas one-way valve (13).

5. The high-efficiency and energy-saving circulating fluidized bed boiler according to claim 1, characterized in that: The spiral heat conducting sheet (4) is a copper sheet.

6. The high-efficiency and energy-saving circulating fluidized bed boiler according to claim 3, characterized in that: A plurality of screw rods (14) are movably sleeved on the side wall of the filter plate (11), and the other end of each screw rod (14) is threadedly sleeved on the side wall of the corresponding support plate (10).

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