Wall structure of fluidized bed furnace

Abstract

The utility model discloses a fluidized bed furnace wall body structure which comprises a vertical wall forming a rectangle in a surrounding mode, the vertical wall comprises a high-aluminum refractory brick layer, a light heat preservation pouring material layer and a red brick layer from inside to outside, and a fire barrier with the two ends abutting against the inner side of the vertical wall is arranged in the space defined by the vertical wall. First expansion gaps are formed in the abutting positions of the fire barrier and the high-aluminum refractory brick layers, Z-shaped second expansion gaps are formed between the high-aluminum refractory brick layers at the connecting positions of the vertical walls, and the first expansion gaps and the second expansion gaps are filled with aluminum silicate refractory fiber felts; a horizontally-arranged ring beam is arranged in the high-aluminum refractory brick layer, and the ring beam is fixed through a tie bar with the ends fixed and arranged in the vertical wall in a penetrating mode. By arranging the first expansion gap, the second expansion gap and the ring beam, the vertical wall has higher thermal state volume stability, the structural strength of the vertical wall is higher, expansion lap joint is more reasonable, and the service life of the fluidized bed furnace can be effectively prolonged.

Description

Technical field:

[0001] The utility model relates to the field of fluidized bed furnace structures, in particular to a fluidized bed furnace wall structure. Background technology:

[0002] The fluidized bed furnace is a device that provides heat source for the lime kiln. It "fluidizes" the solid fuel in the fluidized bed and burns it in a boiling state. During use, under the action of long-term high temperature, the furnace wall will expand with the high temperature, and then produce displacement and deformation. If the expansion joint of the furnace wall is not set properly or not set, it will lead to insufficient or blocked space for the expansion of the furnace wall, causing expansion stress damage to the furnace wall. Moreover, the fluidized bed furnace needs to be turned on and used according to the actual production situation. Under the alternation of hot and cold and the long-term erosion of slag, the furnace wall structure strength is insufficient, resulting in tilting, displacement and other conditions. In severe cases, there is a risk of falling off, cracking and collapse. Utility model content:

[0003] The utility model aims to provide a boiling furnace wall structure.

[0004] The utility model is implemented by the following technical solutions:

[0005] A fluidized bed furnace wall structure comprises a rectangular vertical wall, wherein the vertical wall comprises a high-aluminum refractory brick layer, a lightweight thermal insulation casting material layer and a red brick layer from the inside to the outside, a fire retaining wall with both ends abutting against the inner side of the vertical wall is arranged in the space enclosed by the vertical wall, a first expansion joint is arranged at the abutting position of the fire retaining wall and the high-aluminum refractory brick layer, a second expansion joint in the shape of "Z" is arranged between the high-aluminum refractory brick layers at the junction of the vertical walls, and aluminum silicate refractory fiber felt is filled in the first expansion joint and the second expansion joint; a horizontally arranged ring beam is arranged in the high-aluminum refractory brick layer, and the ring beam is fixed by tie rods fixed at the ends and inserted into the vertical wall.

[0006] Preferably, a plurality of cooling holes are provided on the vertical wall abutting against the fire retaining wall.

[0007] Preferably, a reinforcement beam is provided in the fire retaining wall.

[0008] Preferably, the width of the first expansion joint and the second expansion joint is 13-17 mm.

[0009] Preferably, the ring beam is 1000-1500 mm away from the bottom surface.

[0010] The utility model has the advantages that by setting the first expansion joint, the second expansion joint and the ring beam, the vertical wall has better thermal volume stability, the vertical wall structure strength is higher, the expansion overlap is more reasonable, and the service life of the boiling furnace can be effectively improved. Description of the drawings:

[0011] Figure 1 It is a horizontal cross-section of a vertical wall;

[0012] Figure 2 It is the vertical cross-section of the wall;

[0013] Figure 3 It is a structural diagram of a fire wall.

[0014] In the figure: vertical wall 1, high-alumina refractory brick layer 2, lightweight thermal insulation casting material layer 3, red brick layer 4, fire retaining wall 5, first expansion joint 6, second expansion joint 7, aluminum silicate refractory fiber felt 8, ring beam 9, tie rod 10, reinforcement beam 11, cooling hole 12. Specific implementation method:

[0015] like Figures 1 to 3 As shown, a fluidized bed furnace wall structure comprises a rectangular vertical wall 1, wherein the vertical wall 1 comprises a high-aluminum refractory brick layer 2, a light-weight heat-insulating casting material layer 3 and a red brick layer 4 from the inside to the outside, a fire retaining wall 5 with both ends abutting against the inner side of the vertical wall 1 is arranged in the space enclosed by the vertical wall 1, a first expansion joint 6 is arranged at the abutting position of the fire retaining wall 5 and the high-aluminum refractory brick layer 2, a second expansion joint 7 in a "Z" shape is arranged between the high-aluminum refractory brick layers 2 at the junction of the vertical wall 1, and aluminum silicate refractory fiber felt 8 is filled in the first expansion joint 6 and the second expansion joint 7; a horizontally arranged ring beam 9 is arranged in the high-aluminum refractory brick layer 2, and the ring beam 9 is fixed by a tie rod 10 fixed at the ends and inserted into the vertical wall 1;

[0016] By providing the first expansion joint 6, after the fire retaining wall 5 expands, the aluminum silicate refractory fiber felt 8 in the first expansion joint 6 is squeezed, and the fire retaining wall 5 is not in direct contact with the high-aluminum refractory brick layer 2, thereby reducing the expansion stress at the abutment and improving the service life of the boiling furnace;

[0017] By setting a second expansion joint 7 in a "Z" shape, under the action of long-term high temperature, the connected high-aluminum refractory brick layer 2 will squeeze the aluminum silicate refractory fiber felt 8 in the second expansion joint 7 after expansion, reducing the expansion stress at the abutment point and avoiding deformation and displacement of the high-aluminum refractory brick layer 2; by setting a "Z" shape, expansion can be offset in two directions, further reducing the risk of cracking and collapse of the vertical wall 1;

[0018] The ring beam 9 is used to further reinforce the high-alumina refractory brick layer 2 and is fixed by the tie rods 10 to ensure that the ring beam 9 will not be displaced or moved, thereby improving the earthquake resistance of the fire retaining wall 5 and ensuring the stability of the vertical wall 1.

[0019] Three cooling holes 12 are opened on each vertical wall 1 abutting against the fire retaining wall 5. The cooling holes 12 can dissipate heat when the boiling furnace is burning, so as to reduce the maximum temperature of the boiling furnace during operation and extend the service life of the internal high-aluminum refractory brick layer 2.

[0020] A reinforcement beam 11 is provided inside the fire retaining wall 5 , and the reinforcement beam 11 is used to reinforce the fire retaining wall 5 to prevent the fire retaining wall 5 from deformation and collapse.

[0021] The width of the first expansion joint 6 and the second expansion joint 7 is 13-17 mm, and the compressed high-aluminum refractory brick layer 2 is filled therein to provide sufficient space for displacement caused by expansion, while ensuring that the compressed high-aluminum refractory brick layer 2 can play a certain supporting role to prevent the walls on both sides of the first expansion joint 6 and the second expansion joint 7 from detaching.

[0022] The ring beam 9 is 1000-1500mm away from the bottom surface. If the position of the ring beam 9 is too high or too low, it will lead to the problem of insufficient strength of the vertical wall 1. The position between 1000-1500mm is exactly in the middle of the vertical wall 1, which can fully play the reinforcement role.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluidized bed furnace wall structure, characterized in that: The utility model comprises a vertical wall in a rectangular shape, wherein the vertical wall comprises a high-aluminum refractory brick layer, a light-weight thermal insulation casting material layer and a red brick layer from the inside to the outside, a fire retaining wall with two ends abutting against the inner side of the vertical wall is arranged in the space enclosed by the vertical wall, a first expansion joint is arranged at the abutting position between the fire retaining wall and the high-aluminum refractory brick layer, a second expansion joint in a "Z" shape is arranged between the high-aluminum refractory brick layers at the junction of the vertical wall, and aluminum silicate refractory fiber felt is filled in the first expansion joint and the second expansion joint; a horizontally arranged ring beam is arranged in the high-aluminum refractory brick layer, and the ring beam is fixed by a tie rod fixed at the ends and inserted into the vertical wall.

2. A boiling furnace wall structure according to claim 1, characterized in that: A plurality of cooling holes are provided on the vertical wall abutting against the fire retaining wall.

3. A boiling furnace wall structure according to claim 1 or 2, characterized in that: A reinforcement beam is arranged inside the fire retaining wall.

4. A boiling furnace wall structure according to claim 1 or 2, characterized in that: The width of the first expansion joint and the second expansion joint is 13-17 mm.

5. A boiling furnace wall structure according to claim 1 or 2, characterized in that: The ring beam is 1000-1500mm away from the bottom surface.

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