Coal pipe structure for a fluidized bed furnace

Abstract

The utility model discloses a lower coal pipeline structure for boiling furnace, it includes the embedded pipeline of inclining fixed on the wall body of boiling furnace and the lower coal pipeline of coaxial setting in embedded pipeline, and is linked through the buffer assembly between embedded pipeline and lower coal pipeline, the utility model discloses through the embedding of lower coal pipeline in the embedded pipeline on the wall body of boiling furnace, and is provided with the buffer assembly between embedded pipeline and lower coal pipeline to eliminate the vibration that embedded pipeline is received lower coal pipeline transmission, thereby avoiding the vibration that the wall body of boiling furnace is received raw coal delivery produces, prevents the falling of refractory brick, effectively has improved the service life of boiling furnace, has also reduced the manual and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed furnace technology, specifically to a coal feeding pipe structure for a fluidized bed furnace. Background Technology

[0002] The coal feeding pipe of the fluidized bed furnace is mainly used to transport raw coal with a particle size of less than 30mm from the disc feeder into the fluidized bed furnace, ensuring the normal combustion temperature inside the fluidized bed furnace and realizing the continuous supply of fuel.

[0003] The existing coal feeding pipes of fluidized bed furnaces are directly fixed to the walls of the fluidized bed furnaces. During the transportation of raw coal through the coal feeding pipes, in order to prevent coal from being suspended in the raw coal silo, the vibrators of the coal silo and the disc feeder transmit their own vibrations through the coal feeding pipes to the walls of the fluidized bed furnaces. This causes the refractory bricks around the coal feeding pipes to fall off, which greatly affects the service life of the fluidized bed furnaces and also increases maintenance costs. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a coal feeding pipe structure for a fluidized bed furnace, which solves the problem of refractory bricks falling off around the coal feeding pipe of the fluidized bed furnace due to the transportation of raw coal.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A coal feeding pipe structure for a fluidized bed furnace is provided, comprising a pre-embedded pipe that is inclinedly fixed to the wall of the fluidized bed furnace, and a coal feeding pipe coaxially disposed within the pre-embedded pipe, wherein the pre-embedded pipe and the coal feeding pipe are connected by a buffer assembly.

[0006] This utility model embeds the coal feeding pipe into a pre-embedded pipe in the wall of the fluidized bed furnace, and a buffer component is set between the pre-embedded pipe and the coal feeding pipe to eliminate the vibration transmitted by the coal feeding pipe to the pre-embedded pipe, thereby avoiding the vibration of the fluidized bed furnace wall caused by the raw coal transportation, preventing refractory bricks from falling off, effectively improving the service life of the fluidized bed furnace, and also reducing labor and maintenance costs.

[0007] Furthermore, the buffer assembly includes multiple sets of buffer mechanisms evenly arranged around the coal delivery pipe; the buffer mechanism includes a first arc-shaped plate disposed on the inner wall of the pre-embedded pipe and a second arc-shaped plate disposed on the outer wall of the coal delivery pipe; the first arc-shaped plate and the second arc-shaped plate are connected by springs.

[0008] Furthermore, heat-resistant cotton is used to fill the spaces between adjacent buffer mechanisms.

[0009] Furthermore, the wall thickness of the pre-embedded pipe is greater than 10mm.

[0010] Furthermore, a funnel is installed at the end of the coal feeding pipe located outside the wall of the fluidized bed furnace.

[0011] This utility model discloses a coal feeding pipe structure for a fluidized bed furnace, the beneficial effects of which are: This utility model embeds the coal feeding pipe into a pre-embedded pipe in the wall of the fluidized bed furnace, and a buffer component is set between the pre-embedded pipe and the coal feeding pipe to eliminate the vibration transmitted by the coal feeding pipe to the pre-embedded pipe, thereby avoiding the vibration of the fluidized bed furnace wall caused by the raw coal transportation, preventing refractory bricks from falling off, effectively improving the service life of the fluidized bed furnace, and also reducing labor and maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a coal feeding pipe structure for a fluidized bed furnace according to the present invention.

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the pre-embedded pipe and the coal delivery pipe of this utility model.

[0014] Among them, 1. Fluidized bed furnace wall; 2. Embedded pipe; 3. Coal feeding pipe; 41. First arc plate; 42. Second arc plate; 43. Spring; 44. Heat-resistant cotton; 5. Funnel. Detailed Implementation The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0015] Example 1 refer to Figures 1-2 This embodiment provides a coal feeding pipe structure for a fluidized bed furnace, which aims to solve the problem of refractory bricks falling off around the coal feeding pipe of the fluidized bed furnace due to the transportation of raw coal. The specific structure of this embodiment will be described in detail below.

[0016] A coal feeding pipe structure for a fluidized bed furnace, comprising a pre-embedded pipe 2 and a coal feeding pipe 3; Among them, the pre-embedded pipe 2 is inclined and fixed on the fluidized bed furnace wall 1, and the coal feeding pipe 3 is coaxially set inside the pre-embedded pipe 2; Specifically, the pre-buried pipe 2 and the coal delivery pipe 3 are connected by a buffer assembly.

[0017] Specifically, the wall thickness of the pre-embedded pipe 2 is greater than 10mm.

[0018] Specifically, a funnel 5 is provided at the end of the coal feeding pipe 3 located outside the wall 1 of the fluidized bed furnace.

[0019] In this embodiment, by embedding the coal feeding pipe 3 into the pre-embedded pipe 2 on the fluidized bed furnace wall 1, and by providing a buffer component between the pre-embedded pipe 2 and the coal feeding pipe 3, the vibration transmitted by the coal feeding pipe 3 to the pre-embedded pipe 2 is eliminated, thereby avoiding the vibration of the fluidized bed furnace wall 1 caused by the raw coal conveying, preventing the refractory bricks from falling off, effectively improving the service life of the fluidized bed furnace, and also reducing labor and maintenance costs.

[0020] Specifically, the buffer assembly includes multiple sets of buffer mechanisms evenly arranged around the coal delivery pipe 3; the buffer mechanism includes a first arc plate 41 disposed on the inner wall of the pre-embedded pipe 2 and a second arc plate 42 disposed on the outer wall of the coal delivery pipe 3; the first arc plate 41 and the second arc plate 42 are connected by a spring 43.

[0021] Specifically, heat-resistant cotton 44 is filled between adjacent buffer mechanisms.

[0022] In this embodiment, multiple sets of first arc-shaped plates 41 are evenly arranged in a ring around the coal conveying pipe 3. The first arc-shaped plates 41 and the second arc-shaped plates 42 are welded to the pre-embedded pipe 2 and the coal conveying pipe 3 respectively. Thus, the vibration of the coal conveying pipe 3 during the raw coal transportation process is eliminated by the spring 43 between the first arc-shaped plates 41 and the second arc-shaped plates 42.

[0023] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A coal feeding pipe structure for a fluidized bed furnace, characterized in that: Including a pre-embedded pipe (2) that is inclined and fixed on the wall (1) of the fluidized bed furnace, and a coal feeding pipe (3) that is coaxially arranged in the pre-embedded pipe (2); The pre-embedded pipe (2) and the coal delivery pipe (3) are connected by a buffer assembly.

2. The coal feeding pipe structure for a fluidized bed furnace according to claim 1, characterized in that: The buffer assembly includes multiple sets of buffer mechanisms evenly arranged around the coal delivery pipe (3); the buffer mechanism includes a first arc plate (41) disposed on the inner wall of the pre-embedded pipe (2) and a second arc plate (42) disposed on the outer wall of the coal delivery pipe (3); the first arc plate (41) and the second arc plate (42) are connected by a spring (43).

3. The coal feeding pipe structure for a fluidized bed furnace according to claim 2, characterized in that: Heat-resistant cotton (44) is filled between adjacent buffer mechanisms.

4. The coal feeding pipe structure for a fluidized bed furnace according to claim 1, characterized in that: The wall thickness of the pre-embedded pipe (2) is greater than 10 mm.

5. The coal feeding pipe structure for a fluidized bed furnace according to claim 1, characterized in that: A funnel (5) is provided at the end of the coal feeding pipe (3) located outside the wall (1) of the fluidized bed furnace.

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