Bedding air supply device

Abstract

The application discloses a furnace bed air supply device, which comprises a combustion chamber and an air supply chamber communicated with the combustion chamber, wherein a blowing pipe is arranged in the air supply chamber, the blowing pipe is communicated with a first air outlet opening upward and a second air outlet opening downward, and a dust outlet is arranged at the lower end of the air supply chamber; a cyclone generator communicated with the air supply chamber is arranged in the combustion chamber, a water cooling wall is further arranged in the combustion chamber, and a bending rib is arranged on the water cooling wall. The application is provided with the cyclone generator, and two air outlets arranged adjacently in the cyclone generator are reversely arranged, so that two adjacent cyclones converge together to improve the air power. Meanwhile, the bending rib arranged can overcome the transverse tensile stress caused by thermal expansion and cold contraction, can prevent the water cooling wall from being pulled and damaged, and prolongs the service life of the combustion chamber.

Description

Technical Field

[0001] This invention relates to the field of electric boiler technology, and in particular to a furnace bed air supply device. Background Technology

[0002] In fluidized bed systems used in conjunction with boilers, the circulating air is typically set to blow downwards first, and then the airflow is reflected off the inner wall to create an upward-moving airflow. This is used to move and burn fuel in the combustion chamber. However, because the airflow is reduced after being reflected off the inner wall, the effect on the fuel is weakened, making it easier for heavier fuel to fall into the combustion chamber. The fuel adhering to the combustion chamber will damage the inner wall of the combustion chamber after combustion, shortening the service life of the combustion chamber. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a furnace bed air supply device that can improve wind power and extend service life.

[0004] To solve the above-mentioned technical problems, the present invention provides a furnace bed air supply device, including a combustion chamber and an air supply chamber communicating with the combustion chamber. A baffle is provided between the combustion chamber and the air supply chamber. An air blowing pipe is provided in the air supply chamber, and the air blowing pipe is connected to a first air outlet opening upward and a second air outlet opening downward. An ash outlet is provided at the lower end of the air supply chamber. A cyclone generator communicating with the air supply chamber is provided in the combustion chamber. The cyclone generator includes a first air outlet and a second air outlet, and the air outlet directions of the first air outlet and the second air outlet are arranged in opposite directions. A slag discharge port communicating with the air supply chamber is provided on the baffle. A connecting sleeve protruding from the upper surface of the baffle is connected to the slag discharge port, and a slag discharge cover is screwed onto the connecting sleeve. A water-cooled wall is also provided in the combustion chamber, and bent ribs are provided on the water-cooled wall.

[0005] With the above structure, an air supply duct is installed. The air from the second air outlet mainly assists in discharging the accumulated ash on the inner wall of the air supply chamber, while the air from the first air outlet supplies air to the cyclone generator, forming an upward-flowing cyclone at the generator. Under the action of the cyclone, the fuel is suspended and moved within the combustion chamber, preventing fuel from adhering to the inner wall of the combustion chamber and thus preventing damage to the combustion chamber due to adhering combustion. It also ensures complete combustion of the fuel. In addition, the bending ribs on the water-cooled wall are installed to remove the lateral tensile stress, prevent the water-cooled wall from being torn by thermal expansion and contraction, extend the service life of the combustion chamber, and reduce maintenance costs.

[0006] To simplify the structure and facilitate installation, preferably, the baffle is provided with multiple rows of mounting holes. The cyclone generator also includes a wind cap shaft provided in each mounting hole. The wind cap shaft is provided with a vent hole communicating with the air supply chamber. Two adjacent wind cap shafts are respectively provided with a first wind cap and a second wind cap communicating with the vent hole.

[0007] To simplify the installation structure, preferably, the cyclone generator further includes a connecting shaft on each wind cap shaft. The first wind cap includes a first cap sleeved on the connecting shaft. A first boss is provided on one side of the first cap. Multiple first air inlets communicating with vent holes are provided along the circumferential direction on the upper end face of the first boss. First air outlets are provided in the same direction on the side wall of the first boss at the position corresponding to the first air inlets. The air outlet direction of each first air outlet is the same as the external tangent direction of the corresponding first boss.

[0008] To simplify the installation structure and enhance the cyclone's wind power, the second wind cap preferably includes a second cap sleeved on the connecting shaft. A second protrusion is provided on one side of the second cap, and multiple second air inlets communicating with vents are provided on the upper end face of the second protrusion along the circumferential direction. Second air outlets are provided on the side wall of the second protrusion at positions corresponding to the second air inlets, and the air outlet direction of each second air outlet is the same as the external tangent direction of the corresponding second protrusion.

[0009] For ease of installation, preferably, the water-cooled wall consists of multiple rows of steel pipes connected to cooling water pipes on the inner wall of the combustion chamber, with "U"-shaped bends connecting adjacent rows of steel pipes.

[0010] To facilitate fuel supply, preferably, a coal inlet is provided on the side wall of the combustion chamber, and the coal inlet is inclined with the top higher than the bottom.

[0011] Beneficial effects: The present invention is equipped with a cyclone generator, and the two adjacent air outlets in the cyclone generator are arranged in opposite directions. The two adjacent cyclones converge to increase the air force. At the same time, the set bending ribs overcome the lateral tensile stress of thermal expansion and contraction, which can prevent the water-cooled wall from being pulled and damaged, and extend the service life of the combustion chamber. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2This is a schematic diagram of the structure of the first wind cap.

[0015] Figure 3 This is a schematic diagram of the windproof cap shaft.

[0016] Figure 4 This is a schematic diagram of the airway structure of the first protrusion.

[0017] Figure 5 This is a schematic diagram showing the airflow direction in the first wind cap.

[0018] Figure 6 This is a schematic diagram of the airway structure of the second protrusion.

[0019] Figure 7 This is a diagram showing the usage state of the present invention.

[0020] Figure 8 for Figure 7 Enlarged view of point A in the image.

[0021] The meanings of the labels in the attached diagram are as follows:

[0022] Combustion chamber-1; Bending rib-10; Steel pipe-101; Coal inlet-11;

[0023] Air supply chamber-2; baffle-20; first air outlet-21; second air outlet-22; slag discharge port-23; connecting sleeve-231; slag discharge cover-232; ash discharge port-24;

[0024] Connecting shaft-30; hood shaft-31; vent-310; first cap-311; first boss-312; first air inlet-313; first air outlet-314; second cap-321; second boss-322; second air inlet-323; second air outlet-324. Detailed Implementation

[0025] Depend on Figures 1 to 8 As shown, the present invention includes a combustion chamber 1 and an air supply chamber 2 connected to the combustion chamber 1. An air blowing pipe is provided in the air supply chamber 2, and the air blowing pipe is connected to a first air outlet 21 that opens upward and a second air outlet 22 that opens downward. An ash outlet 24 is provided at the lower end of the air supply chamber 2. A cyclone generator connected to the air supply chamber 2 is provided in the combustion chamber 1. A water-cooled wall is also provided in the combustion chamber 1, and a bending rib 10 is provided on the water-cooled wall.

[0026] Specifically, a baffle 20 is provided between the combustion chamber 1 and the air supply chamber 2, and multiple rows of mounting holes are provided on the baffle 20. The cyclone generator includes a wind cap shaft 31 provided in each mounting hole. A vent hole 310 communicating with the air supply chamber 2 is provided on the wind cap shaft 31, and a first wind cap and a second wind cap communicating with the vent hole 310 are respectively provided on two adjacent wind cap shafts 31.

[0027] The cyclone generator further includes a connecting shaft 30 disposed on each wind cap shaft 31. The first wind cap includes a first cap 311 sleeved on the connecting shaft 30. A first protrusion 312 is provided on one side of the first cap 311. A plurality of first air inlets 313 communicating with vent holes 310 are provided along the circumferential direction on the upper end face of the first protrusion 312. A first air outlet 314 is provided in the same direction on the side wall of the first protrusion 312 at the position corresponding to the first air inlets 313. The air outlet direction of each first air outlet 314 is the same as the external tangent direction of the corresponding position of the first protrusion 312. The second vent cap includes a second cap 321 sleeved on the connecting shaft 30. A second protrusion 322 is provided on one side of the second cap 321. A plurality of second air inlets 323 communicating with the vent holes 310 are provided on the upper end face of the second protrusion 322 along the circumferential direction. A second air outlet 324 is provided on the side wall of the second protrusion 322 at the position corresponding to the second air inlets 323, and the air outlet direction of each second air outlet 324 is the same as the external tangent direction of the corresponding second protrusion 322. The air outlet directions between the first air outlet 314 and the second air outlet 324 are all set in opposite directions.

[0028] The water-cooled wall consists of multiple rows of steel pipes 101 connected to cooling water pipes on the inner wall of the combustion chamber 1. A "U"-shaped bending rib 10 is connected between two adjacent rows of steel pipes 101. A slag discharge port 23 connected to the air supply chamber 2 is provided on the baffle 20. A connecting sleeve 231 protruding from the upper end face of the baffle 20 is connected to the slag discharge port 23. A slag discharge cover 232 is screwed onto the connecting sleeve 231.

[0029] A coal inlet 11 is provided on the side wall of the combustion chamber 1, and the coal inlet 11 is inclined with the upper part higher than the lower part.

[0030] The working principle of this invention is as follows:

[0031] like Figures 1 to 4 as well as Figure 6As shown, the coal inlet 11 is angled downwards to facilitate fuel input, prevent fuel stagnation and accumulation, and avoid adhering combustion on the inner wall of the combustion chamber 1, thus preventing equipment damage. An air supply pipe is installed. The air from the second air outlet 22 mainly assists in discharging the accumulated ash on the inner wall of the air supply chamber 2 to the ash outlet 24, while the air from the first air outlet 21 supplies air to the cyclone generator, forming an upward-flowing cyclone at the generator. Specifically, the air from the first air outlet 21 flows into the corresponding cap through the wind cap shaft 31 connected to the baffle 20 and the vent 310. Since adjacent wind cap shafts 31 are respectively equipped with a first wind cap and a second wind cap connected to the vent 311, in the first… The wind cap has a first protrusion 312 with nine first air inlets 313. A first air outlet 314 is connected to each of the first air inlets 313 on the side wall of the first protrusion 312, and all nine first air outlets 314 are oriented in the same direction. Similarly, the second wind cap has a second protrusion 322 with nine second air inlets 323. A second air outlet 324 is connected to each of the second air inlets 323 on the side wall of the second protrusion 322, and all nine second air outlets 324 are oriented in the same direction. Therefore, the air flowing into the cap flows through the corresponding air inlets to the corresponding air outlets and is discharged into the combustion chamber 1 (e.g., Figure 5 The flow direction diagram shown is the same for the second wind cap.

[0032] At the same time, combined Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, in each row and each column, the air outlet directions of the first air outlet 314 and the second air outlet 324 are set in opposite directions. According to the above settings, the air blown out by the two adjacent air caps converges, and there is no longer any collision or interference between them, which increases the wind force. In addition, the air outlet directions of the first air outlet 314 and the second air outlet 324 are the same as the outer tangent direction of the corresponding boss. The blown air diverges in the horizontal circumferential direction and forms an upward swirling wind. When the converged wind speed reaches 0.2-2.0 m / s, the wind force lifting effect on the fuel is better, and the fuel combustion is more complete.

[0033] In addition, such as Figure 1 , Figure 7 and Figure 8As shown, the "U"-shaped bending ribs 10 set on the water-cooled wall eliminate the stress of lateral pulling, avoid the steel pipes 101 in the water-cooled wall from being pulled and damaged by thermal expansion and contraction, and extend the service life. After use, open the ash discharge cover 232 and sweep the ash from the connecting sleeve 231 on the ash discharge port 23 into the air supply chamber 2. Then, it is necessary to leave an ash thickness that is flush with the upper end face of the connecting sleeve 231, mainly as an isolation pad for the inner wall of the combustion chamber 1 to prevent fuel from falling and adhering to the inside of the combustion chamber 1.

Claims

1. A furnace bed air supply device, characterized in that: The device includes a combustion chamber (1) and an air supply chamber (2) connected to the combustion chamber (1). A baffle (20) is provided between the combustion chamber (1) and the air supply chamber (2). An air blowing pipe is provided in the air supply chamber (2). The air blowing pipe is connected to a first air outlet (21) that opens upward and a second air outlet (22) that opens downward. An ash outlet (24) is provided at the lower end of the air supply chamber (2). A slag discharge port (23) connected to the air supply chamber (2) is provided on the baffle (20). A connecting sleeve (231) protruding from the upper surface of the baffle (20) is connected to the slag discharge port (23). A slag discharge cover (232) is screwed onto the connecting sleeve (231). A cyclone generator communicating with the air supply chamber (2) is provided in the combustion chamber (1). Multiple rows of mounting holes are provided on the baffle (20). The cyclone generator includes a wind cap shaft (31) provided in each mounting hole. A connecting shaft (30) is provided on each wind cap shaft (31). A vent hole (310) communicating with the air supply chamber (2) is provided on the wind cap shaft (31). A first wind cap and a second wind cap communicating with the vent hole (310) are respectively provided on two adjacent wind cap shafts (31). The first wind cap includes a first cap (311) sleeved on the connecting shaft (30). A first boss (312) is provided on one side of the first cap (311). Multiple first air inlets (313) communicating with the vent hole (310) are provided along the circumferential direction on the upper end face of the first boss (312). The first boss (312) has a first air outlet (314) connected in the same direction at the position corresponding to the first air inlet (313) on the side wall of the first boss (312); the second wind cap includes a second cap (321) sleeved on the connecting shaft (30), a second boss (322) is provided on one side of the second cap (321), and a plurality of second air inlets (323) connected to the vent (310) are provided on the upper end face of the second boss (322) along the circumferential direction. A second air outlet (324) is connected in the same direction at the position corresponding to the second air inlet (323) on the side wall of the second boss (322), and the air outlet directions between the first air outlet (314) and the second air outlet (324) are all set in opposite directions; a water-cooled wall is also provided in the combustion chamber (1), and a bent rib (10) is provided on the water-cooled wall.

2. The furnace bed air supply device as described in claim 1, characterized in that: The air outlet direction of each of the first air outlets (314) is the same as the external tangent direction of the corresponding first protrusion (312).

3. The furnace bed air supply device as described in claim 2, characterized in that: The air outlet direction of each of the second air outlets (324) is the same as the external tangent direction of the corresponding second protrusion (322).

4. The furnace bed air supply device as described in claim 1, characterized in that: The water-cooled wall consists of multiple rows of steel pipes (101) connected to cooling water pipes on the inner wall of the combustion chamber (1), with "U"-shaped bent ribs (10) connecting adjacent rows of steel pipes (101).

5. The furnace bed air supply device as described in claim 1, characterized in that: A coal inlet (11) is provided on the side wall of the combustion chamber (1), and the coal inlet (11) is obliquely arranged with the upper part higher than the lower part.

Images