Air-cooled refractory furnace wall for waste incinerator

Abstract

The utility model discloses an air cooling type fireproof furnace wall for garbage incinerator belongs to fireproof furnace wall technical field, including the firebrick layer that sets up from furnace wall inside to outside in proper order, air interlayer, heat preservation layer and heat insulating layer, is equipped with air inlet pipe and air outlet pipe respectively on heat insulating layer, is equipped with valve plate in air inlet pipe, and the pivot of valve plate is connected with air inlet pipe through torsional spring, and one end of pivot is equipped with torsion lever, is equipped with hollow tube on heat insulating layer, and one end of hollow tube extends to the inside of air outlet pipe, and pressurized liquid is installed in hollow tube, and piston rod is equipped with sliding seal in hollow tube, and piston rod is contacted with torsion lever, the fireproof furnace wall of the utility model can fill in air to air interlayer through air inlet pipe, and the air of air outlet pipe is discharged, makes the heat on firebrick layer be taken away by the airflow rapidly, to slow down the reaction of firebrick and molten ash, and alleviates the coking of furnace wall.

Description

Technical Field

[0001] This utility model relates to the field of refractory furnace wall technology, specifically to an air-cooled refractory furnace wall for a waste incinerator. Background Technology

[0002] A waste incinerator is a specialized piece of equipment that treats municipal solid waste, industrial waste, and medical waste through high-temperature combustion, aiming to achieve waste reduction, harmlessness, and resource recovery. The combustion zone of an incinerator typically requires a temperature of 850℃ or even higher. However, during high-temperature operation, the fly ash and slag produced transform into a soft, molten glassy state at 800–1000℃ and adhere to the furnace wall surface. As the incinerator continues to operate, the fly ash deposits grow, increasing the load on the furnace wall lining and generating significant thermomechanical stress. This causes bulging and protrusion of the refractory lining, and these deposits erode the refractory wall, ultimately leading to refractory brick detachment and fracture, furnace wall collapse, and severely impacting the stable operation of the incinerator. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an air-cooled refractory furnace wall for waste incinerators.

[0004] The technical solution of this utility model is: an air-cooled refractory furnace wall for a waste incinerator, comprising a refractory brick layer, an air interlayer, a heat insulation layer, and a heat insulation layer arranged sequentially from the inner side to the outer side of the furnace wall; an air inlet pipe and an air outlet pipe are respectively provided on the upper and lower sides of the outer side wall of the heat insulation layer, both the air inlet pipe and the air outlet pipe passing through the heat insulation layer and the heat insulation layer and communicating with the air interlayer, and a valve plate is provided in the air inlet pipe to control the air intake by rotation, the rotating shaft of the valve plate being connected to the air inlet pipe through a torsion spring, and one end of the rotating shaft passing through the air inlet pipe and having a torsion rod for rotating the rotating shaft by deflection; a hollow tube is vertically fixed on the outer side wall of the heat insulation layer, one end of the hollow tube extending into the interior of the air outlet pipe, the hollow tube being filled with pressurized liquid, and a piston rod slidingly sealed inside the hollow tube by the vaporization of the pressurized liquid, one end of the piston rod passing through the hollow tube and contacting the torsion rod.

[0005] Explanation: The aforementioned refractory furnace wall continuously injects air into the air jacket through the air inlet pipe and automatically exhausts air through the air outlet pipe. This allows the airflow to quickly remove heat from the refractory brick layer, slowing down the reaction between the refractory brick and the molten ash, and alleviating coking of the furnace wall. As the air outlet temperature increases, the pressure inside the hollow tube also increases. The piston rod slides under pressure to press the torsion rod, allowing the valve plate to adjust the air intake in the air inlet pipe according to the air outlet temperature. This prevents a large amount of gas from entering the air jacket during the preheating stage of the incinerator, which would cause excessively rapid temperature loss inside the incinerator.

[0006] Furthermore, one end of the piston rod is provided with a mating frame sleeved on the torsion rod.

[0007] Note: The mating frame can restrict the position of the torsion bar to prevent the torsion bar from separating from the piston rod, which would prevent the piston rod from driving the torsion bar.

[0008] Furthermore, the pressurizing fluid is alcohol or water.

[0009] Note: The pressurized fluid described above can be fully vaporized when the temperature rises to provide sufficient pressure to drive the piston rod to rotate.

[0010] Furthermore, the length of the hollow tube extending into the air outlet pipe is 1 / 4 to 3 / 4 of the inner diameter of the air outlet pipe.

[0011] Note: Limiting the insertion length of the hollow tube into the vent pipe ensures that the temperature inside the vent pipe can effectively heat the pressurized liquid and prevents the hollow tube from extending too far, thus affecting the exhaust of the vent pipe.

[0012] Furthermore, the valve plate is rotatably connected to the intake pipe, and the rotation angle of the valve plate is ≤90°.

[0013] Note: Limiting the rotation angle of the valve plate can prevent it from rotating excessively, which would cause the air intake volume of the air intake pipe to reach its maximum and then begin to decrease, thus affecting the heat dissipation effect of the refractory brick layer.

[0014] The beneficial effects of this utility model are:

[0015] (1) The refractory furnace wall of this utility model can continuously fill the air gap through the air inlet pipe and automatically exhaust the air through the air outlet pipe, so that the airflow can quickly carry away the heat on the refractory brick layer, thereby slowing down the reaction between the refractory brick and the molten ash and relieving the coking of the furnace wall.

[0016] (2) The valve plate of this utility model can adjust the amount of gas entering the inlet pipe according to the gas temperature of the gas outlet pipe, so as to avoid a large amount of gas entering the air jacket when the incinerator is in the preheating stage, which would cause the temperature inside the incinerator to drop too quickly. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the hollow tube structure of Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the intake pipe structure of Embodiment 1 of this utility model;

[0020] Figure 4 This is a top view of the air intake pipe in Embodiment 1 of this utility model;

[0021] Figure 5 This is a longitudinal sectional view of the air intake pipe in Embodiment 1 of this utility model;

[0022] Figure 6 This is a longitudinal sectional view of the air outlet pipe of Embodiment 1 of this utility model;

[0023] Figure 7 This is a schematic diagram of the air intake pipe structure of Embodiment 2 of this utility model;

[0024] Among them, 1-refractory brick layer, 11-support plate, 2-air interlayer, 21-air inlet pipe, 22-air outlet pipe, 23-valve plate, 231-rotating shaft, 232-torsion rod, 24-hollow tube, 241-piston rod, 242-connecting frame, 3-insulation layer, 4-heat insulation layer. Detailed Implementation

[0025] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0026] Example 1: As Figure 1 As shown, an air-cooled refractory furnace wall for a waste incinerator includes a refractory brick layer 1, an air interlayer 2, an insulation layer 3, and a heat insulation layer 4, arranged sequentially from the inner to the outer side of the furnace wall. The insulation layer 3 is made of perlite castable, and the heat insulation layer 4 is made of calcium silicate board. Support plates 11 for connecting the insulation layer 3 and the heat insulation layer 4 are provided on both the upper and lower sides of the refractory brick layer 1. Figure 2 , Figure 3 As shown, an air inlet pipe 21 and an air outlet pipe 22 are respectively provided on the upper and lower sides of the outer side wall of the insulation layer 4. Both the air inlet pipe 21 and the air outlet pipe 22 pass through the insulation layer 3 and the insulation layer 4 and are connected to the air gap 2. Figure 4 , Figure 5 As shown, the intake pipe 21 is equipped with a valve plate 23 that controls the air intake volume by rotation. The left end of the rotating shaft 231 of the valve plate 23 passes through the intake pipe 21 and is connected to the intake pipe 21 by a torsion spring. The right end of the rotating shaft 231 passes through the intake pipe 21 and is equipped with a torsion rod 232 for rotating the rotating shaft 231 by deflection. A hollow tube 24 is vertically fixed on the outer wall of the heat insulation layer 4, such as... Figure 6 As shown, the upper end of the hollow tube 24 extends into the interior of the vent pipe 22. The hollow tube 24 is filled with pressurizing liquid, and a piston rod 241 is slidably sealed inside the hollow tube 24, which slides by utilizing the vaporization of the pressurizing liquid. The lower end of the piston rod 241 passes through the hollow tube 24 and contacts the torsion rod 232. The pressurizing liquid is alcohol, and the length of the hollow tube 24 extending into the vent pipe 22 is 1 / 2 of the inner diameter of the vent pipe 22.

[0027] The working principle of the above-mentioned refractory furnace wall is as follows: In the initial state, the valve plate 23 is in an inclined state. When the incinerator just starts to heat up, the valve plate 23 will block the air intake of the air inlet pipe 21 to prevent a large amount of air from entering the air jacket 2 and taking away heat, which will cause the incinerator to heat up at a slower rate. After the incinerator heats up, the outlet temperature in the outlet pipe 22 will rise and heat the hollow tube 24. The pressurized liquid will vaporize due to the temperature rise, which will increase the pressure in the hollow tube 24 and push the piston rod 241 to slide downward. The downward movement of the piston rod 241 will push the torsion rod 232 to rotate, which will reduce the inclination angle of the valve plate 23 driven by the rotating shaft 231, and gradually increase the air intake in the air inlet pipe 21.

[0028] Example 2: As Figure 7 As shown, this embodiment is basically the same as embodiment 1, except that the lower end of the piston rod 241 is provided with a docking frame 242 sleeved on the torsion rod 232.

[0029] The working principle of the above-mentioned docking frame 242 is as follows: when the piston rod 241 slides downward, the top surface of the docking frame 242 will press down the torsion rod 232 to prevent the torsion rod 232 from separating from the piston rod 241.

[0030] Example 3: This example is basically the same as Example 1, except that the valve plate 23 is rotatably connected to the intake pipe 21, and the valve plate 23 is rotatably connected to the intake pipe 21 through the arc groove provided on the rotating shaft 231 and the retaining post provided on the side wall of the intake pipe 21, and the maximum rotation angle of the valve plate 23 is 90°.

[0031] Example 4: This example is basically the same as Example 1, except that the pressurizing fluid is water.

Claims

1. An air-cooled refractory furnace wall for a waste incinerator, characterized in that, The furnace wall includes a refractory brick layer (1), an air interlayer (2), an insulation layer (3), and a heat insulation layer (4) arranged sequentially from the inside to the outside. The heat insulation layer (4) has an air inlet pipe (21) and an air outlet pipe (22) on its upper and lower sides, respectively. Both the air inlet pipe (21) and the air outlet pipe (22) pass through the insulation layer (3) and the heat insulation layer (4) and are connected to the air interlayer (2). The air inlet pipe (21) is equipped with a valve plate (23) that controls the air intake by rotation. The rotating shaft (231) of the valve plate (23) is connected to the air inlet pipe (21) by a torsion spring. The shaft (231) is connected, and one end of the shaft (231) passes through the air inlet pipe (21) and is provided with a torsion rod (232) for rotating the shaft (231) by deflection; a hollow tube (24) is vertically fixed on the outer wall of the heat insulation layer (4), one end of the hollow tube (24) extends into the air outlet pipe (22), the hollow tube (24) is filled with pressurized liquid, and a piston rod (241) is slidably sealed in the hollow tube (24) for sliding by heating and vaporizing the pressurized liquid, one end of the piston rod (241) passes through the hollow tube (24) and contacts the torsion rod (232).

2. The air-cooled refractory furnace wall for a waste incinerator according to claim 1, characterized in that, One end of the piston rod (241) is provided with a docking frame (242) sleeved on the torsion rod (232).

3. The air-cooled refractory furnace wall for a waste incinerator according to claim 1, characterized in that, The pressurizing fluid is alcohol or water.

4. The air-cooled refractory furnace wall for a waste incinerator according to claim 1, characterized in that, The length of the hollow tube (24) extending into the air outlet pipe (22) is 1 / 4 to 3 / 4 of the inner diameter of the air outlet pipe (22).

5. The air-cooled refractory furnace wall for a waste incinerator according to claim 1, characterized in that, The valve plate (23) is rotatably connected to the air intake pipe (21), and the rotation angle of the valve plate (23) is ≤90°.

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