An air distribution plate for uniform distribution of primary air in a boiling furnace

Abstract

The utility model discloses an air distribution plate which is beneficial to the uniform distribution of primary air in a boiling furnace, comprising: a plate body, an air inlet inner cylinder and a cover body; a plurality of through air inlet channels are evenly distributed on the plate body; the air inlet inner cylinder is arranged in the air inlet channel, and a plurality of air outlet slots are equidistantly provided on the peripheral wall of the air inlet inner cylinder along the axial direction; the cover body is arranged on the air inlet inner cylinder, and a plurality of annularly arranged air outlet holes are equidistantly provided on the peripheral wall of the cover body, and the open end of the cover body is fixedly arranged on the ring side of the open end of the air inlet channel; a movable cylinder which is arranged on the air inlet inner cylinder is arranged between the air inlet inner cylinder and the cover body, and the closed end of the movable cylinder abuts against the open end of the air inlet inner cylinder; the wall surface of the air inlet inner cylinder and the movable cylinder are slidably connected; during long-term use, the air distribution plate provided by the utility model is not easy to be affected by dust accumulation in the primary air chamber and the air duct and the air distribution effect can be affected, and the air outlet exposure range on the air outlet side can be adaptively adjusted according to the air flow pressure on the air inlet side of the hood.

Description

Technical Field

[0001] The utility model relates to the technical field of gypsum board drying equipment, in particular to an air distribution plate which is beneficial to uniform distribution of primary air in a boiling furnace. Background Art

[0002] Fluidized bed furnace is a device that adds coal and limestone to the air distribution plate in the furnace, and then lets air in through the wind chamber to improve the completeness of coal powder combustion. The air distribution plate used in the fluidized bed furnace will greatly affect the completeness of coal powder combustion in the fluidized bed furnace. Incomplete combustion of coal powder not only causes energy waste, but also makes it impossible to reach the heat required in the preparation process of gypsum board.

[0003] Existing air distribution plates are usually evenly distributed with multiple porous hoods to form an "air bed" on the air distribution plate, thereby improving the completeness of coal powder combustion. However, if the holes on the hood and the primary air chamber are in a connected state for a long time, the coal ash produced by the combustion of coal powder on the air distribution plate will easily enter the primary air chamber and air duct through the holes on the hood, causing ash accumulation inside. As the ash accumulation in the primary air chamber and air duct continues to increase, it will not only interfere with the primary air flow, causing the uniformity of air distribution inside the furnace to deteriorate; it will also cause the ash accumulation to re-enter the furnace with the primary air flow, causing the ash accumulation to affect the combustion of the newly filled coal powder. Utility Model Content

[0004] The purpose of the utility model is to provide an air distribution plate which is beneficial to the uniform distribution of the primary air of a boiling furnace, so as to solve the problems in the prior art that the primary air chamber and the air duct of the air distribution plate are prone to dust accumulation during long-term use, resulting in a decrease in the air distribution effect, and the existing wind hood cannot adaptively adjust the exposure range of the air outlet on the air outlet side according to the air flow pressure on the air inlet side.

[0005] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0006] The utility model provides an air distribution plate which is beneficial to the uniform distribution of primary air in a boiling furnace, comprising: a plate body, on which a plurality of through air inlet channels are evenly distributed; an air inlet inner cylinder, which is arranged in the air inlet channel, and a plurality of air outlet slots are equidistantly provided on the peripheral wall of the air inlet inner cylinder along the axial direction; a cover body, which is arranged on the air inlet inner cylinder, and a plurality of annularly arranged air outlet holes are equidistantly provided on the peripheral wall of the cover body, and the open end of the cover body is fixedly arranged on the ring side of the open end of the air inlet channel; wherein a movable cylinder which is arranged on the air inlet inner cylinder is provided between the air inlet inner cylinder and the cover body, the closed end of the movable cylinder abuts against the open end of the air inlet inner cylinder, and the open end of the movable cylinder completely blocks the air outlet slots; the air inlet inner cylinder and the wall surface of the movable cylinder are slidably connected, and the movable cylinder moves upward along its axis when the air inlet inner cylinder takes in air, so that the air outlet slots are at least partially exposed outside the movable cylinder.

[0007] Furthermore, a plurality of air outlet holes are linearly arranged along the axial direction of the cover body; wherein the air outlet holes are arranged opposite to the air outlet slots.

[0008] Furthermore, the wall surface of the movable cylinder is partially concave to form an inner concave portion; wherein the inner concave portion is embedded in the air outlet slot, and the convex surface of the inner concave portion abuts against the slot wall of the air outlet slot.

[0009] Furthermore, at least two inner concave portions are provided on the wall surface of the movable cylinder in a centrally symmetrical manner.

[0010] Furthermore, the number of the inner recesses is the same as the number of the air outlet slots, and the inner recesses and the air outlet slots correspond one to one.

[0011] Furthermore, the axial cross section of the inner concave portion is semi-elliptical.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model arranges a movable cylinder between the cover body and the air inlet inner cylinder which can be adjusted up and down according to the size of the air intake pressure in the air inlet inner cylinder, thereby being able to change the air outlet range of the air outlet slot, and adaptively adjusting the air outlet volume of the hood according to the size of the air intake pressure, thereby preventing the air outlet slot from being in an open state for a long time and allowing coal ash to enter therein through the holes on the cover body, which is beneficial to preventing the coal ash on the air distribution plate from entering the air inlet inner cylinder to form accumulation, blockage and agglomeration, thereby improving the air distribution effect of the hood and enabling the coal powder to be fully burned in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 This is a simplified structural diagram of the boiling furnace in the utility model;

[0016] Figure 2 for Figure 1 The three-dimensional structure diagram of the middle air distribution plate;

[0017] Figure 3 for Figure 2 A cross-sectional view of

[0018] Figure 4 for Figure 3 Enlarged view of middle Ⅱ;

[0019] Figure 5 for Figure 2 A three-dimensional diagram of the structure of a stroke cap.

[0020] Figure 6 for Figure 5 Exploded diagram of

[0021] Figure 7 for Figure 5 A cross-sectional view of

[0022] Figure 8 for Figure 7 Enlarged view of middle Ⅰ.

[0023] The numbers in the figure represent the following:

[0024] 10. Plate body; 11. Air inlet channel; 20. Air inlet inner cylinder; 21. Air outlet slot; 30. Cover body; 31. Air outlet hole; 40. Movable cylinder; 41. Inner recess. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-4 As shown, the utility model provides an air distribution plate which is beneficial to uniform distribution of primary air in a boiling furnace, comprising:

[0027] The plate body 10 has a plurality of through air inlet passages 11 evenly arranged thereon;

[0028] The air inlet inner cylinder 20 is arranged in the air inlet passage 11, and a plurality of air outlet slots 21 are equidistantly provided on the peripheral wall of the air inlet inner cylinder 20 along the axial direction;

[0029] The cover body 30 is disposed on the air inlet inner cylinder 20. A plurality of annularly arranged air outlet holes 31 are evenly spaced on the peripheral wall of the cover body 30. The open end of the cover body 30 is fixedly disposed on the open end ring side of the air inlet channel 11.

[0030] Among them, a movable cylinder 40 is provided between the air inlet inner cylinder 20 and the cover body 30 and is covered on the air inlet inner cylinder 20. The closed end of the movable cylinder 40 abuts against the open end of the air inlet inner cylinder 20, and the open end of the movable cylinder 40 completely blocks the air outlet slot 21.

[0031] The air inlet inner cylinder 20 and the wall surface of the movable cylinder 40 are slidably connected. When the air inlet inner cylinder 20 takes in air, the movable cylinder 40 moves upward along its axis, so that the air outlet slot 21 is at least partially exposed outside the movable cylinder 40 .

[0032] The utility model aims to provide a movable cylinder 40 between the cover body 30 and the air inlet inner cylinder 20, which can be adjusted up and down according to the size of the air inlet pressure in the air inlet inner cylinder 20, so as to change the air outlet range of the air outlet slot 21, so as to adaptively adjust the air outlet volume of the hood according to the size of the air inlet pressure, so as to avoid the air outlet slot 21 being in an open state for a long time, and to allow the coal ash to enter through the holes on the cover body 30, which is conducive to preventing the coal ash on the air distribution plate from entering the air inlet inner cylinder 20 to form accumulation, blockage, and agglomeration, thereby improving the air distribution effect of the hood, so that the coal powder can be fully burned in the furnace. Specifically, when the air inlet inner cylinder 20 is ventilated upward, the top of the movable cylinder 40 is sealed, and when it is impacted by the air flow, the movable cylinder 40 can move upward as a whole, and the lower open end of the movable cylinder 40 after moving upward exposes part of the air outlet slot 21, so that the air flow can be blown out from the through hole on the cover body 30, so as to form an air flow layer on the air distribution plate to disperse the coal ash. It should be noted that in order to prevent the top wall of the cover body 30 from limiting the range of movement of the movable cylinder 40, the radius of the top hemispherical structure of the cover body 30 should be equal to the height of the cylindrical structure below it, and the height of the movable cylinder 40 should not be greater than 1 / 2 of the height of the cover body 30, thereby ensuring that the movable cylinder 40 does not contact the top wall of the cover body 30 when moving upward, so that when the movable cylinder 40 moves upward due to the impact of the airflow, it can completely expose the wind slot 21, thereby achieving the maximum air output of the hood.

[0033] In this embodiment, the air distribution plate is arranged to provide support for the arrangement of the wind hood, thereby achieving uniform dispersion of the coal powder on the plate body 10 through the combination of the bearing capacity of the plate body 10 on the coal powder and the air distribution effect of the wind hood, so as to assist the combustion of the coal powder through multiple air flow layers and increase the heat energy emitted by the combustion of the coal powder.

[0034] In the above embodiment, the arrangement of the air outlet holes 31 on the cover body 30 limits the air outlet volume of the air outlet slot 21. Although the airflow flowing through the air outlet slot 21 can also be deflected by the inner wall of the cover body 30 and then flow through the air outlet holes 31 to act on the air distribution plate, the airflow that can be blown directly out of the air outlet holes 31 is relatively small, resulting in a thin airflow layer on the air distribution plate, which makes it difficult to lift the coal powder and play a role in combustion.

[0035] To solve the above problems, please continue to refer to Figure 5-6 As shown, in the preferred embodiment provided by the utility model based on the above embodiment, a plurality of air outlet holes 31 are linearly arranged along the axial direction of the cover body 30;

[0036] The air outlet hole 31 is disposed opposite to the air outlet slot 21 .

[0037] The utility model can correspond to the air flow path in the air outlet slot 21 by arranging a plurality of air outlet holes 31 in the axial direction of the cover body 30, so that the airflow flowing out of the air outlet slot 21 can be directly passed through the air outlet holes 31 to form relatively stable multiple airflows on the air guide plate, thereby supporting the combustion of the coal powder by lifting the coal powder and improving the combustion completeness of the coal powder.

[0038] In the above embodiment, the movable cylinder 40 is loosely fitted on the outer wall of the air inlet inner cylinder 20. During the movement of the movable cylinder 40, friction may occur between the wall surface of the movable cylinder 40 and the outer wall of the air inlet inner cylinder 20 due to uneven force on the movable cylinder 40, thus affecting the normal movement of the movable cylinder 40.

[0039] In order to solve the above problems, Figure 5-6 As shown, in the preferred embodiment provided by the present invention based on the above-mentioned embodiment, the wall surface of the movable cylinder 40 is partially concave to form a concave portion 41;

[0040] The inner concave portion 41 is embedded in the air outlet slot 21 , and the convex surface of the inner concave portion 41 abuts against the slot wall of the air outlet slot 21 ; at least two inner concave portions 41 are centrally symmetrically provided on the wall surface of the movable cylinder 40 .

[0041] In the present embodiment, a plurality of annularly arranged inner recesses 41 are provided on the wall surface of the movable cylinder 40 so that it can be embedded in the air outlet slot 21 to limit the movement of the movable cylinder 40. This not only avoids the friction between the wall surface of the movable cylinder 40 and the outer wall of the air inlet inner cylinder 20 due to uneven force on the movable cylinder 40, but also avoids the displacement of the axial position of the movable cylinder 40 during the movement, thereby improving the smoothness of the movement of the movable cylinder 40 and ensuring its regulating effect on the air volume of the air outlet slot 21.

[0042] In order to improve the stability of the movable cylinder 40 when sliding along the air outlet slot 21, in a preferred embodiment provided by the present invention based on the above embodiment, the number of the inner recesses 41 is the same as the number of the air outlet slots 21, and the inner recesses 41 and the air outlet slots 21 correspond one to one.

[0043] like Figure 7-8 As shown, in order to prevent the inner concave portion 41 from being easily deviated from the movable range in the air outlet slot 21, in a preferred embodiment provided by the utility model based on the above embodiment, the axial cross section of the inner concave portion 41 is semi-elliptical.

[0044] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. An air distribution plate that is beneficial to the uniform distribution of primary air in a boiling furnace, characterized in that: include: A plate body (10) on which a plurality of through-going air inlet passages (11) are evenly arranged; An air inlet inner cylinder (20) is arranged in the air inlet passage (11), and a plurality of air outlet slots (21) are equidistantly arranged in the axial direction on the peripheral wall of the air inlet inner cylinder (20); A cover body (30) is disposed on the air inlet inner cylinder (20), a plurality of annularly arranged air outlet holes (31) are equidistantly provided on the peripheral wall of the cover body (30), and an open end of the cover body (30) is fixedly disposed on the open end ring side of the air inlet channel (11); Wherein, a movable cylinder (40) is provided between the air inlet inner cylinder (20) and the cover body (30), and is covered on the air inlet inner cylinder (20); the closed end of the movable cylinder (40) abuts against the open end of the air inlet inner cylinder (20); and the open end of the movable cylinder (40) completely covers the air outlet slot (21); The air inlet inner cylinder (20) and the wall surface of the movable cylinder (40) are slidably connected, and the movable cylinder (40) moves upward along its axis when the air inlet inner cylinder (20) takes in air, so that the air outlet slot (21) is at least partially exposed outside the movable cylinder (40).

2. The air distribution plate for uniformly distributing primary air in a fluidized bed furnace according to claim 1, characterized in that: A plurality of the air outlet holes (31) are linearly arranged along the axial direction of the cover body (30); Wherein, the air outlet hole (31) is arranged opposite to the air outlet slot (21).

3. The air distribution plate for uniformly distributing primary air in a fluidized bed furnace according to claim 2, characterized in that: The wall surface of the movable cylinder (40) is partially concave to form a concave portion (41); The inner recess (41) is embedded in the air outlet slot (21), and the convex surface of the inner recess (41) abuts against the slot wall of the air outlet slot (21).

4. The air distribution plate for uniformly distributing primary air in a fluidized bed furnace according to claim 3, characterized in that: At least two inner recesses (41) are provided on the wall surface of the movable cylinder (40) in a centrally symmetrical manner.

5. The air distribution plate for uniformly distributing primary air in a fluidized bed furnace according to claim 4, characterized in that: The number of the inner recesses (41) is the same as the number of the air outlet slots (21), and the inner recesses (41) and the air outlet slots (21) correspond one to one.

6. The air distribution plate for uniformly distributing primary air in a fluidized bed furnace according to claim 5, characterized in that: include: The axial cross section of the inner concave portion (41) is semi-elliptical.

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