Cooling device for circulating fluidized bed boiler

Abstract

The utility model provides a cooling device for a circulating fluidized bed boiler, and belongs to the field of circulating fluidized bed boilers. The slag cooling assembly comprises a cooling box connected with the boiler body, a through groove is formed in the cooling box in a penetrating mode, a hollow plate which is obliquely arranged and hinged to the inner wall of the cooling box is arranged in the through groove, and a driving mechanism for driving the hollow plate to swing up and down is installed on the cooling box. A plurality of stainless steel plates distributed at equal intervals are fixed to the upper end of the hollow plate, a pumping mechanism for conveying cooling water into the hollow plate is installed on the cooling box, an upper cover is installed at the upper end of the cooling box, and a plurality of fans are installed on the upper cover. According to the utility model, the cooling area of the slag is increased, the slag is more effectively and comprehensively cooled, and meanwhile, the slag can be prevented from being blocked in the diversion trench, so that the cooled slag can be more stably discharged without manual participation.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating fluidized bed boilers, in particular to a cooling device for a circulating fluidized bed boiler. Background Art

[0002] The circulating fluidized bed boiler technology is a highly efficient, low-pollution and clean combustion technology that has developed rapidly in the past decade or so.

[0003] There is a slag cooling device for a circulating fluidized bed boiler with a prior art publication number of CN203489260U, which is arranged on the left side, right side or rear side of the main furnace of the circulating fluidized bed boiler. It includes a cooling air chamber, air caps, a cooling chamber, a slag discharge pipe, cooling buried pipes, and an overflow port; the air caps separate the cooling air chamber from the cooling chamber, one end of the slag discharge pipe is connected to the air cap and the other end passes through the cooling air chamber, the overflow port is located on the upper side of the cooling chamber to communicate the cooling chamber with the main furnace, and the cooling buried pipes are located between the overflow port and the air caps.

[0004] The above prior art cools the slag through the cooling buried pipes, but such cooling effect is poor and it is easy to cause the slag to block at the slag discharge pipe, and subsequent manual cleaning is very inconvenient; for this reason, this application proposes a cooling device for a circulating fluidized bed boiler. Summary of the Utility Model

[0005] Aiming at the deficiencies in the prior art, the utility model provides a cooling device for a circulating fluidized bed boiler.

[0006] An embodiment of the utility model provides a cooling device for a circulating fluidized bed boiler, including:

[0007] A boiler body;

[0008] A slag cooling assembly; the slag cooling assembly includes a cooling box connected to the boiler body. A through groove is provided through the cooling box. A hollow plate is provided in the through groove and is inclined and hinged to the inner wall of the cooling box. A driving mechanism for driving the hollow plate to swing up and down is installed on the cooling box. A plurality of stainless steel plates are fixed at the upper end of the hollow plate at equal intervals. A pumping mechanism for conveying cooling water into the hollow plate is installed on the cooling box. An upper cover is installed at the upper end of the cooling box, and a plurality of fans are installed on the upper cover.

[0009] Further, a slag discharge port is provided on the boiler body, and an overflow port is provided through the cooling box. The overflow port is arranged opposite to the slag discharge port.

[0010] Further, the driving mechanism includes a reversing box fixed on the cooling box. There are two meshing bevel gears inside the reversing box. A motor is installed on the reversing box. The output end of the motor is fixedly connected to one of the bevel gears. The other bevel gear is coaxially fixed with a short rod, and a cam is fixed on the short rod. The cam abuts against the bottom of the hollow plate.

[0011] Further, one end of the hollow plate located inside the cooling box is fixed with a connecting plate. A shaft rod fixedly connected is penetrated through the connecting plate. The shaft rod is rotatably connected to the inner wall of the cooling box.

[0012] Further, the pumping mechanism includes a water tank installed on the cooling box. A water pump is installed on the water tank. The water inlet end of the water pump is connected to the water tank. The water outlet end of the water pump is installed with a delivery hose. The delivery hose is communicated with the hollow plate. A return hose is installed on the hollow plate. The return hose is connected to the water tank.

[0013] Further, a thermoelectric cooler is hermetically installed through the water tank. The refrigerating end of the thermoelectric cooler is located inside the water tank. A radiator is installed at the heating end of the thermoelectric cooler.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model increases the cooling area of the slag, cools the slag more effectively and comprehensively, and at the same time can avoid the blockage of the slag in the diversion groove, so that the cooled slag can be discharged more stably without manual participation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a cooling device for a circulating fluidized bed boiler in an embodiment of the utility model.

[0017] Figure 2 It is a side view of a cooling box in a cooling device for a circulating fluidized bed boiler in an embodiment of the utility model.

[0018] Figure 3 It is an internal schematic diagram of a cooling box in a cooling device for a circulating fluidized bed boiler in an embodiment of the utility model.

[0019] In the above-mentioned drawings: 1 boiler body, 2 cooling box, 3 upper cover, 4 fan, 5 water tank, 6 thermoelectric cooler, 7 water pump, 8 delivery hose, 9 return hose, 10 hollow plate, 11 stainless steel plate, 12 cam, 13 reversing box, 14 through groove, 15 motor, 16 overflow port, 17 connecting plate, 18 shaft rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] As Figures 1 - 3 shown, an embodiment of the present utility model provides a cooling device for a circulating fluidized bed boiler, including:

[0022] The boiler body 1;

[0023] The slag cooling assembly; the slag cooling assembly includes a cooling box 2 connected to the boiler body 1. There is a slag discharge port on the boiler body 1, and an overflow port 16 is provided through the cooling box 2. The overflow port 16 is disposed opposite to the slag discharge port, so that the slag can fall on the hollow plate 10 through the overflow port 16.

[0024] A through groove 14 is provided through the cooling box 2. A hollow plate 10 which is inclined and hinged to the inner wall of the cooling box 2 is arranged in the through groove 14. The hollow plate 10 is made of stainless steel; a connecting plate 17 is fixed at one end of the hollow plate 10 located in the cooling box 2. A shaft rod 18 which is fixedly connected is provided through the connecting plate 17. The shaft rod 18 is rotatably connected to the inner wall of the cooling box 2. As Figure 3 shown, the inclined arrangement is beneficial to guide and discharge the slag.

[0025] A plurality of stainless steel plates 11 are fixedly arranged at equal intervals at the upper end of the hollow plate 10. A flow guiding groove is formed between two adjacent stainless steel plates 11. When the slag moves downward through the flow guiding groove, the contact area between the slag and the hollow plate 10 and the stainless steel plates 11 can be increased, and the slag can be more effectively heat exchanged and cooled.

[0026] A pumping mechanism for conveying cooling water into the hollow plate 10 is installed on the cooling box 2. The pumping mechanism includes a water tank 5 installed on the cooling box 2. A semiconductor refrigeration sheet 6 is hermetically installed through the water tank 5. The refrigerating end of the semiconductor refrigeration sheet 6 is located inside the water tank 5, and a radiator is installed at the heating end of the semiconductor refrigeration sheet 6. The water in the water tank 5 can be refrigerated and cooled by the semiconductor refrigeration sheet 6 for use in cooling the slag.

[0027] A water pump 7 is installed on the water tank 5. The water inlet end of the water pump 7 is connected to the water tank 5, the water outlet end of the water pump 7 is installed with a delivery hose 8, the delivery hose 8 is communicated with the hollow plate 10, a return hose 9 is installed on the hollow plate 10, and the return hose 9 is connected to the water tank 5. When the water pump 7 works, the cooling water can be conveyed into the hollow plate 10 through the delivery hose 8. As the cooling water in the hollow plate 10 increases, it finally returns to the water tank 5 through the upper return hose 9. In this way, the recycling of the cooling water can be realized; the low-temperature cooling water fills the hollow plate 10, and the temperature can be transferred to the stainless steel plates 11. The slag can be heat exchanged and cooled through the hollow plate 10 and the stainless steel plates 11.

[0028] However, the slag located at the upper part and the upper end cannot be effectively cooled. For this reason, an upper cover 3 is installed at the upper end of the cooling box 2, and a plurality of fans 4 are installed on the upper cover 3. When the fans 4 work, they can perform air cooling on the slag above, achieving effective and comprehensive cooling treatment of the slag.

[0029] In order to prevent the slag from blocking in the diversion trough, a driving mechanism for driving the hollow plate 10 to swing up and down is installed on the cooling box 2. The driving mechanism includes a reversing box 13 fixed on the cooling box 2. Two meshing bevel gears are arranged in the reversing box 13. A motor 15 is installed on the reversing box 13. The output end of the motor 15 is fixedly connected to one of the bevel gears. The other bevel gear is coaxially fixed with a short rod, and a cam 12 is fixed on the short rod. The cam 12 abuts against the bottom of the hollow plate 10. When the motor 15 works, the cam 12 rotates through the transmission of the bevel gears. The rotation of the cam 12 and the use of the gravity of the hollow plate 10 can make the hollow plate 10 swing up and down, thus preventing the slag from blocking in the diversion trough and eliminating the need for manual cleaning.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A cooling device for a circulating fluidized bed boiler, characterized in that: include: Boiler body (1); A slag cooling assembly; the slag cooling assembly comprises a cooling box (2) connected to a boiler body (1), the cooling box (2) being provided with a through slot (14), the through slot (14) being provided with a hollow plate (10) which is arranged obliquely and hingedly connected to the inner wall of the cooling box (2), the cooling box (2) being provided with a driving mechanism for driving the hollow plate (10) to swing up and down, a plurality of stainless steel plates (11) which are equidistantly fixed to the upper end of the hollow plate (10), the cooling box (2) being provided with a pumping mechanism for conveying cooling water into the hollow plate (10), the upper end of the cooling box (2) being provided with an upper cover (3), and the upper cover (3) being provided with a plurality of fans (4).

2. A cooling device for a circulating fluidized bed boiler according to claim 1, characterized in that: in: The boiler body (1) is provided with a slag outlet, and the cooling box (2) is provided with an overflow port (16) penetrating therethrough, wherein the overflow port (16) is arranged opposite to the slag outlet.

3. The cooling device for a circulating fluidized bed boiler according to claim 1, characterized in that: in: The driving mechanism comprises a direction-changing box (13) fixed on the cooling box (2), two meshing bevel gears are arranged in the direction-changing box (13), a motor (15) is installed on the direction-changing box (13), an output end of the motor (15) is fixedly connected to one of the bevel gears, a short rod is coaxially fixed to the other bevel gear, a cam (12) is fixed on the short rod, and the cam (12) abuts against the bottom of the hollow plate (10).

4. The cooling device for a circulating fluidized bed boiler according to claim 1, characterized in that: in: A connecting plate (17) is fixed to one end of the hollow plate (10) located in the cooling box (2), and a fixedly connected shaft rod (18) passes through the connecting plate (17), and the shaft rod (18) is rotatably connected to the inner wall of the cooling box (2).

5. The cooling device for a circulating fluidized bed boiler according to claim 1, characterized in that: in: The pumping mechanism comprises a water tank (5) mounted on the cooling box (2), a water pump (7) mounted on the water tank (5), a water inlet end of the water pump (7) being connected to the water tank (5), a delivery hose (8) being mounted on the water outlet end of the water pump (7), the delivery hose (8) being connected to the hollow plate (10), a return hose (9) being mounted on the hollow plate (10), and the return hose (9) being connected to the water tank (5).

6. A cooling device for a circulating fluidized bed boiler according to claim 5, characterized in that: in: A semiconductor refrigeration sheet (6) is installed through the water tank (5) in a sealed manner. The cooling end of the semiconductor refrigeration sheet (6) is located inside the water tank (5). A heat sink is installed at the heating end of the semiconductor refrigeration sheet (6).

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