Building gypsum fluidization calcination system

Abstract

A building gypsum fluidization calcining system comprises a fluidization calcining furnace, an auger is arranged in the fluidization calcining furnace in the length direction of the fluidization calcining furnace, a discharging port of the fluidization calcining furnace is communicated with a conveying pipeline inclining downwards, and the conveying pipeline is of a square structure; a cooling unit is arranged on one side of the conveying pipeline and comprises a cooling fan, a dehumidifier and a cooling air pipe assembly which are sequentially communicated, the cooling air pipe assembly is arranged in the conveying pipeline, and an air outlet of the cooling air pipe assembly is formed in the end, away from the discharging opening, of the conveying pipeline; the cooling air pipe assembly comprises a first air pipe set and a second air pipe which are communicated, the first air pipe set is located on the upper portion of the inner side of the conveying pipeline, and the upper surface of the second air pipe is a plane. Gypsum powder calcined in the fluidization calcining furnace is conveyed to the conveying pipeline from the discharging port through the auger and conveyed to the next procedure through the lower end of the conveying pipeline, and the cooling air pipe assembly capable of conducting air cooling on the gypsum powder is arranged on the inner side of the conveying pipeline. The cooling positions of the cooling air pipe assembly are located on the upper side and the lower side of the conveying pipeline, the cooling area of the cooling air pipe assembly can be increased, water cannot be generated on the surface, and rehydration reaction of calcined gypsum powder is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to building gypsum fluidized calcination technical field, concretely is a kind of building gypsum fluidized calcination system. BACKGROUND

[0002] The calcination of building gypsum is to convert natural gypsum into calcium sulfate hemihydrate by dehydration through heating. The calcined gypsum needs to be cooled to improve quality and performance. The existing cooling methods are generally natural ventilation and cooling water cooling.

[0003] The prior art cools the calcined gypsum by cooling water, for example, a calcining device for producing building gypsum powder with patent No. CN217499088U, the calcined gypsum powder is transported to the top surface of the water storage cavity, and the cooling water circulates in the water storage cavity. The gypsum powder is cooled by the cooling water. However, the low temperature of the cooling water in this patent can cause the surface temperature of the water storage cavity to be lower than the dew point temperature of the surrounding air, resulting in condensation of water vapor in the air on the surface of the tank, especially the top surface. This can cause the gypsum powder to absorb moisture from the surface of the water storage cavity and undergo rehydration, which can reduce the strength of the gypsum powder and cause it to clump, affecting its loose type and flowability. SUMMARY

[0004] To solve the technical problems in the background art, the utility model provides a building gypsum fluidized calcination system.

[0005] The utility model technical scheme is as follows:

[0006] A building gypsum fluidized calcination system, comprising a fluidized calcination furnace, a screw conveyor is arranged along the length direction of the fluidized calcination furnace, the fluidized calcination furnace has a feed inlet and a discharge outlet, and a downwardly inclined conveying pipe is connected to the discharge outlet of the fluidized calcination furnace, and the conveying pipe has a square structure.

[0007] A cooling unit is provided on one side of the conveying pipe, which comprises a cooling fan, a dehumidifier and a cooling air pipe assembly connected in sequence, the cooling air pipe assembly is arranged in the conveying pipe, and the air outlet of the cooling air pipe assembly is arranged at the end of the conveying pipe away from the discharge outlet.

[0008] The cooling air pipe assembly comprises a first air pipe group and a second air pipe connected in series, the first air pipe group is located on the upper part of the inner side of the conveying pipe, the second air pipe is located on the bottom of the inner side of the conveying pipe, the length direction of the second air pipe is consistent with the length direction of the conveying pipe, and the upper surface of the second air pipe is a plane.

[0009] The gypsum powder calcined in the fluidized calciner is transported to the conveying pipeline from the discharge port through the auger, is transported to the next process through one end of the conveying pipeline located below, and the inside of the conveying pipeline is provided with a cooling air pipe assembly capable of air cooling the gypsum powder, and the cooling position of the cooling air pipe assembly is located on the upper and lower sides of the conveying pipeline, so that the cooling area of the cooling air pipe assembly can be increased, the surface will not produce moisture, and the rehydration reaction of the calcined gypsum powder is reduced.

[0010] The specific structure of the first air pipe group is that the first air pipe group comprises a plurality of first air pipes arranged side by side along the width direction of the conveying pipeline, the first air pipe is a circular pipe, the first air pipe is located at the upper part of the conveying pipeline, and the ratio of the outer diameter of the first air pipe to the internal height of the conveying pipeline is 0.3-0.4, so that the first air pipe can avoid occupying a large area and blocking a large amount of gypsum powder from being transported in the conveying pipeline.

[0011] The structure of the second air pipe is that the cross section of the second air pipe is a hollow rectangular structure, the second air pipe is arranged along the bottom surface of the inside of the conveying pipeline, the upper surface of the second air pipe is a plane, and the second air pipe is consistent with the installation direction of the inclined conveying pipeline, so that the upper surface of the second air pipe is arranged in an inclined downward manner in the conveying pipeline, the gypsum powder is cooled on the upper surface of the second air pipe and slides out of the conveying pipeline downward at the same time, the contact area of the second air pipe and the gypsum powder is increased, and the phenomenon that the gypsum powder is accumulated in the conveying pipeline does not occur.

[0012] In order to further scatter the calcined gypsum powder, the gypsum powder can fall to the upper surface of the second air pipe uniformly, the gypsum powder can be uniformly cooled, and the scattering assembly is arranged in the discharge port, the scattering assembly comprises a rotating shaft arranged horizontally and a plurality of scattering paddles arranged on the rotating shaft, and both ends of the rotating shaft are rotatably connected with the side wall of the discharge port.

[0013] In order to improve the scattering effect of the scattering assembly on the gypsum powder, the auger comprises a rotating shaft, one end of the rotating shaft and one end of the rotating shaft on the same side are extended outward through the fluidized calciner, and the end portions of the rotating shaft and the rotating shaft extending out of the fluidized calciner are drivingly connected through a belt pulley assembly.

[0014] The connection structure of the first air pipe group and the second air pipe is that the first air pipe group and the second air pipe are communicated through the connecting pipeline arranged on the outside of the conveying pipeline, the air inlet of the connecting pipeline is communicated with the air outlet of the dehumidifier, the cooling air in the first air pipe group and the second air pipe needs to be discharged in time at a position away from the discharge port after cooling the gypsum powder in the conveying pipeline for a certain stroke, and the flow path of the cooling air is prolonged.

[0015] The specific setting position of the air outlet is that the first air outlet is arranged at the upper portion of the end of the conveying pipeline far from the discharge port, the first air outlet is communicated with the first air pipes respectively, and the second air outlet is arranged at the lower portion of the end of the conveying pipeline far from the discharge port, and the second air outlet is communicated with the second air pipe.

[0016] The utility model has the advantages of:

[0017] The conveying pipeline is used for conveying the calcined gypsum powder, the first air pipe group and the second air pipe are arranged in the conveying pipeline, the heat in the gypsum powder is cooled through the cooling air in the first air pipe group and the second air pipe, the second air pipe is adaptively arranged in the downwardly inclined conveying pipeline, the upper surface of the second air pipe is a downwardly inclined plane, the contact area with the gypsum powder is increased, the cooling of the gypsum powder is accelerated, the gypsum powder is conveniently conveyed along the inclined plane to the outlet of the conveying pipeline, and the phenomenon that the gypsum powder is accumulated in the conveying pipeline is reduced.

[0018] In order to further improve the cooling efficiency of the gypsum powder, the first air pipe is a circular pipe, the circular pipe is relative to the square structure of the second air pipe, the heat absorption area is greatly improved, the gypsum powder is cooled through the cooling air, the gypsum powder is prevented from being rehydrated due to damp, the quality and performance of the gypsum powder are improved.

[0019] The discharge port is provided with a scattering assembly, the calcined gypsum powder is further scattered, the gypsum powder is conveniently and evenly dropped to the upper surface of the second air pipe, and the gypsum powder is evenly cooled. BRIEF DESCRIPTION OF DRAWINGS

[0020] In the drawings:

[0021] Figure 1 It is a sectional view structure schematic view;

[0022] Figure 2 It is Figure 1 It is an enlarged structure schematic view of position A in the middle;

[0023] Figure 3 It is Figure 1 It is an enlarged structure schematic view of position B in the middle;

[0024] Figure 4 It is a right view;

[0025] Figure 5 It is a left view;

[0026] Figure 6 It is a conveying pipeline and cooling air pipe assembly structure schematic view;

[0027] The components represented by the reference signs in the drawings are:

[0028] 1, fluidized calciner; 11, feeding port; 12, discharging port; 13, burner; 2, auger; 21, rotating shaft; 3, conveying pipe; 31, first air outlet; 32, second air outlet; 4, cooling fan; 5, dehumidifier; 6, first air pipe; 7, second air pipe; 8, scattering assembly; 81, rotating shaft; 82, scattering paddle; 9, pulley assembly; 91, pulley; 92, belt; 10, connecting pipe. DETAILED DESCRIPTION

[0029] Referring to Figure 1 , Figure 2 and Figure 3 , a building gypsum fluidized calcination system includes a fluidized calciner 1, a furnace body of the fluidized calciner 1 and a burner 13 arranged thereon, the burner 13 can deliver generated heat energy into the furnace body for fluidized calcination of gypsum powder, the fluidized calciner 1 has a feeding port 11 and a discharging port 12, an auger 2 is arranged in the fluidized calciner 1 along the length direction thereof, the auger 2 is driven to rotate by a driving motor, the auger 2 can both turn the gypsum powder and push the gypsum powder to move towards the discharging port 12, and the fluidized calcination of the gypsum powder is realized by cooperation of the auger 2 and the high-temperature heating gas (not shown) in the fluidized calciner 1, the discharging port 12 of the fluidized calciner 1 is connected and communicated with an inclined downward conveying pipe 3, and the conveying pipe 3 has a square structure.

[0030] The conveying pipe 3 is provided with a cooling unit on one side, the cooling unit includes a cooling fan 4, a dehumidifier 5 and a cooling air pipe assembly which are sequentially and communicatively arranged, the cooling fan 4 and the dehumidifier 5 are both prior art, the cooling fan 4 is used for providing cooling air to the cooling air pipe assembly, the dehumidifier 5 is used for dehumidifying the cooling air to reduce the moisture in the cooling air, and then the dehumidified cooling air is delivered to the cooling air pipe assembly. The cooling air pipe assembly is arranged in the conveying pipe 3, and the air outlet of the cooling air pipe assembly is arranged at one end of the conveying pipe 3 away from the discharging port 12, the square conveying pipe 3 is convenient for installing the cooling air pipe assembly and can increase the cooling area of the cooling air pipe assembly.

[0031] The cooling air pipe assembly includes a first air pipe group and a second air pipe 7 which are communicatively arranged, the first air pipe group is located on the upper part of the inner side of the conveying pipe 3, the second air pipe 7 is located on the bottom of the inner side of the conveying pipe 3, the length direction of the second air pipe 7 is consistent with the length direction of the conveying pipe 3, and the upper surface of the second air pipe 7 is a plane.

[0032] The specific structure of the first air pipe group in the embodiment is that the first air pipe group includes a plurality of first air pipes 6 which are arranged side by side along the width direction of the conveying pipe 3, the first air pipe 6 is a circular pipe, the first air pipe 6 is located on the upper part of the conveying pipe 3, and the ratio of the outer diameter of the first air pipe 6 to the height of the conveying pipe 3 is 0.3-0.4, which can avoid the phenomenon that the first air pipe 6 occupies too large an area and blocks the conveying of a large amount of gypsum powder in the conveying pipe 3.

[0033] In this embodiment, the second air duct 7 is a square air duct with a hollow rectangular cross-section. The second air duct 7 is arranged along the bottom surface of the inner side of the conveying pipe 3. The upper surface of the second air duct 7 is flat, and the installation direction of the second air duct 7 is consistent with that of the inclined conveying pipe 3. This allows the upper surface of the second air duct 7 to be inclined downward inside the conveying pipe 3, which facilitates the cooling of gypsum powder on the upper surface of the second air duct 7 and allows it to slide downward out of the conveying pipe 3. This increases the contact area between the second air duct 7 and the gypsum powder and prevents the gypsum powder from accumulating inside the conveying pipe 3.

[0034] See Figure 5 and Figure 6 As shown, the specific locations of the air outlets are as follows: a first air outlet 31 is located at the upper part of the end of the conveying pipe 3 furthest from the discharge port 12. The first air outlet 31 is connected to multiple first air ducts 6 and is used for air outlet from the first air ducts 6. A second air outlet 32 ​​is located at the lower part of the end of the conveying pipe 3 furthest from the discharge port 12 and is connected to a second air duct 7. The second air outlet 32 ​​is used for air outlet from the second air duct 7. The cooling air temperature at the air outlet is relatively high. By placing the air outlet at the end of the conveying pipe 3 furthest from the discharge port 12, high-temperature heat can be avoided from accumulating near the discharge port.

[0035] The above structure enables the following functions: the conveying pipe 3 is used to convey calcined gypsum powder, and a first air duct group and a second air duct 7 are installed inside it. The cooling air in the first air duct group and the second air duct 7 cools the heat in the gypsum powder. The second air duct 7 is adapted to be installed in the downwardly inclined conveying pipe 3. The upper surface of the second air duct 7 is a downwardly inclined plane, which can increase the contact area with the gypsum powder, accelerate the cooling of the gypsum powder, and facilitate the gypsum powder to be transported along the inclined plane to the outlet of the conveying pipe 3, reducing the phenomenon of gypsum powder accumulating in the conveying pipe 3. By setting a dispersing component 8 that rotates synchronously with the auger 2 at the discharge port 12, the peak can be evenly dispersed to the upper surface of the second air duct 7, so that the gypsum powder can dissipate heat evenly.

[0036] The connection structure of the first air duct group and the second air duct 7 is as follows: the first air duct group and the second air duct 7 are connected by a connecting pipe 10 set outside the conveying pipe 3. The air inlet of the connecting pipe 10 is connected to the air outlet of the dehumidifier 5. After the cooling air in the first air duct group and the second air duct 7 cools the gypsum powder in the conveying pipe 3 for a certain distance, the temperature of the cooling air will rise and needs to be discharged in time at a position away from the discharge port 12 to extend the flow path of the cooling air.

[0037] See Figure 2 and Figure 4The size of the dispersing paddle 82 is smaller than the size of the discharge port 12, which can facilitate the rotation of the dispersing paddle 82, and both ends of the rotating shaft 81 are rotatably connected to the side wall of the discharge port 12. In order to improve the dispersing effect of the dispersing assembly 8 on the gypsum powder, the auger 2 includes a rotating shaft 21, and the same side end of the rotating shaft 21 and the rotating shaft 81 extends out of the fluidized calcination furnace 1. The end of the rotating shaft 21 and the rotating shaft 81 that penetrates out of the fluidized calcination furnace 1 is drivingly connected through a belt pulley assembly 9. The end of the rotating shaft 21 and the rotating shaft 81 that penetrates out of the fluidized calcination furnace 1 is provided with a belt pulley 91 matched therewith, and a belt 92 is sleeved on the two belt pulleys 91. Through the rotation of the auger 2, the rotating shaft 81 is driven to rotate, so that the dispersing paddle 82 can keep rotating, which facilitates the dispersing of the gypsum powder conveyed by the auger 2.

Claims

1. A fluidized calcining system for building gypsum, comprising a fluidized calcining furnace (1) having an auger (2) disposed along the length of the furnace (1), the furnace (1) having an inlet (11) and an outlet (12), characterized in that, The fluidized calcination furnace (1) is provided with an inclined downward conveying pipeline (3) communicated at the discharge port (12), and the conveying pipeline (3) is a square structure; The conveying pipeline (3) is provided with a cooling unit on one side, and the cooling unit comprises a cooling fan (4), a dehumidifier (5) and a cooling air pipe assembly communicated in sequence; the cooling air pipe assembly is arranged in the conveying pipeline (3), and the air outlet of the cooling air pipe assembly is arranged at one end of the conveying pipeline (3) away from the discharge port (12); The cooling air pipe assembly comprises a first air pipe group and a second air pipe (7) communicated, the first air pipe group is located on the upper side of the inner side of the conveying pipeline (3), the second air pipe (7) is located on the bottom of the inner side of the conveying pipeline (3), and the upper surface of the second air pipe (7) is a plane.

2. A fluidized calcining system for architectural gypsum according to claim 1, characterized in that, The first air pipe group comprises a plurality of first air pipes (6) arranged side by side along the width direction of the conveying pipeline (3), the first air pipe (6) is a circular pipe, and the ratio of the outer diameter of the first air pipe (6) to the height of the conveying pipeline (3) is 0.3-0.

4.

3. A fluidized calcining system for architectural gypsum according to claim 2, characterized in that, The second air pipe (7) is a hollow rectangular structure in cross section, and the second air pipe (7) is arranged along the bottom surface of the inner side of the conveying pipeline (3).

4. A fluidized calcining system for architectural gypsum according to claim 1, characterized in that, The discharge port (12) is provided with a scattering assembly (8), the scattering assembly (8) comprises a rotating shaft (81) arranged horizontally and a plurality of scattering paddles (82) arranged on the rotating shaft (81), and both ends of the rotating shaft (81) are rotatably connected with the side wall of the discharge port (12).

5. A fluidized calcining system for architectural gypsum according to claim 4, characterized in that, The auger (2) comprises a rotating shaft (21), one end of the rotating shaft (21) and one end of the rotating shaft (81) on the same side extend out of the fluidized calcination furnace (1), and the end portions of the rotating shaft (21) and the rotating shaft (81) extending out of the fluidized calcination furnace (1) are drivingly connected through a belt pulley assembly (9).

6. A fluidized calcining system for architectural gypsum according to claim 1, characterized in that, The first air pipe group and the second air pipe (7) are communicated through a connecting pipeline (10) arranged on the outer side of the conveying pipeline (3), and the air inlet of the connecting pipeline (10) is communicated with the air outlet of the dehumidifier (5).

7. A fluidized calcining system for architectural gypsum according to claim 3, characterized in that, The upper portion of one end of the conveying pipeline (3) away from the discharge port (12) is provided with a first air outlet (31), the first air outlet (31) is communicated with the plurality of first air pipes (6) respectively, and the lower portion of one end of the conveying pipeline (3) away from the discharge port (12) is provided with a second air outlet (32), and the second air outlet (32) is communicated with the second air pipe (7).

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