Suspension calcining device

Abstract

A suspension calcining device relates to the field of calcium carbonate calcining devices and comprises a suspension calcining furnace and a rotary material scattering assembly arranged in the suspension calcining furnace, the rotary material scattering assembly comprises a blanking barrel with a plurality of discharge ports formed in the side wall, and material guide frames in one-to-one correspondence with the discharge ports are arranged on the inner wall of the blanking barrel; the outer wall of the discharging barrel is provided with material spraying plates in one-to-one correspondence with the discharging openings, one ends of the material spraying plates are fixed to the outer wall of the discharging barrel and flush with the lower edges of the discharging openings, and the other ends of the material spraying plates are lower than the lower edges of the discharging openings. According to the utility model, the material scattering plate is arranged on the outer side wall of the blanking barrel, so that materials passing through the discharge port fall onto the material scattering plate firstly and then are scattered along with the rotation of the material scattering plate, and the material scattering plate is of a relatively wide plate-shaped structure, so that the area for receiving calcium carbonate powder is increased, the blockage phenomenon in the material scattering process is reduced, and the material scattering efficiency is improved. And blanking can be realized at the edge part of the material scattering plate, so that the uniformity of calcium carbonate powder in the blanking process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium carbonate calcining device field, specifically speaking is a kind of suspension calcining device. BACKGROUND

[0002] Lime powder is white powder material with calcium carbonate as main component, and application range is very extensive, and most common is used in building industry, that is, calcium carbonate for industry, and calcination is important process in lime powder processing.

[0003] At present, when suspending calcination is carried out to powdery limestone, the ground powdery limestone is directly put into calcining furnace, then powdery limestone is suspended in calcining furnace by the way that vortex is formed by wind blowing, and is calcined by heating, but such powdery limestone feeding mode is prone to cause powdery limestone to accumulate and discharge.

[0004] Therefore, the patent with application No.202211502875.2 discloses a calcium carbonate suspension calcination preparation process, and also discloses a calcium carbonate suspension calcination preparation device used, the inner cavity of the calcining furnace of the device is provided with a rotating material spraying group, as shown in Figure 6 The lower part of the discharge cylinder 6 is provided with a driving gear 4 connected with an external driving motor, the side wall of the discharge cylinder 6 is provided with a discharge port, the inner wall of the discharge cylinder is provided with a material guide frame 7 aligned with the discharge port, and the outer side wall of the discharge cylinder 6 is provided with a spraying pipeline 16 communicated with the discharge port and aligned with the material guide frame.

[0005] Since the spraying channel 16 in the patent is in a cylindrical shape, in the use process, the calcium carbonate entering the spraying channel is prone to gather in the spraying channel due to its own gravity and centrifugal force, causing the channel to be blocked, thereby affecting the smooth progress of the suspension calcination preparation process, and the spraying channel gradually decreases from top to bottom, and the spraying channel has a certain length, especially the upper spraying channel is longer, so it is relatively inconvenient to dredge the blocked spraying channel. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a suspension calcining device to solve the problem that the side wall of the discharge cylinder is easily blocked in the prior art.

[0007] In order to solve the above technical problems, the utility model adopts the specific scheme that a suspension calcining device comprises a suspension calcining furnace and a rotating material spraying assembly arranged in the suspension calcining furnace, the rotating material spraying assembly comprises a discharge cylinder with a plurality of discharge ports arranged in the side wall, the inner wall of the discharge cylinder is provided with a material guide frame corresponding to the discharge ports, and the outer wall of the discharge cylinder is provided with a material spraying plate corresponding to the discharge ports, one end of the material spraying plate is fixed to the outer wall of the discharge cylinder and is flush with the lower edge of the discharge port, and the other end of the material spraying plate is lower than the lower edge of the discharge port.

[0008] As a further optimization of the above technical solution, the acute angle between the material spreading plate and the horizontal plane is 15-35 degrees.

[0009] As a further optimization of the above technical solution, the edge of the material spreading plate is provided with an upward protruding guard strip, the height of the guard strip gradually decreases along the direction away from the material outlet of the material spreading plate, and the end of the guard strip is flush with the upper plate surface of the material spreading plate.

[0010] As a further optimization of the above technical solution, the lower plate surface of the material spreading plate is provided with a disturbance plate, and the included angle between the disturbance plate and the material spreading plate is an acute angle.

[0011] As a further optimization of the above technical solution, the material outlet on the material feeding cylinder and the material spreading plate on the outer wall of the material feeding cylinder are both provided with multiple layers, and the disturbance plates below the material spreading plates of the same layer have the same inclination angle.

[0012] As a further optimization of the above technical solution, the material spreading plate is a fan-shaped plate.

[0013] As a further optimization of the above technical solution, a plurality of material spreading holes are formed in the plate body of the material spreading plate.

[0014] As a further optimization of the above technical solution, the diameter of the material spreading hole is 0.5-1 cm.

[0015] As a further optimization of the above technical solution, an air inlet assembly is arranged in the suspension calcination furnace, and the air inlet assembly is located at the bottom of the rotating material spreading assembly.

[0016] As a further optimization of the above technical solution, the air inlet assembly comprises an air conveying pipe and a plurality of air outlet nozzles arranged at intervals on the air conveying pipe.

[0017] The utility model discloses a material spreading plate is installed on the outside wall of the material feeding cylinder, and the material falling through the material outlet falls on the material spreading plate first, and then realizes material spreading along with the rotation of the material spreading plate, compared with the spraying channel in the prior art, the material spreading plate is relatively open plate structure, which increases the area of calcium carbonate powder receiving and reduces the occurrence of clogging phenomenon in the material spreading process, and the edge of the material spreading plate can realize material falling without the need of concentrating calcium carbonate powder to the outlet of the spraying channel for releasing, thereby improving the uniformity of calcium carbonate powder in the material falling process.

[0018] The utility model discloses a material spreading plate is installed on the outside wall of the material feeding cylinder, and the material falling through the material outlet falls on the material spreading plate first, and then realizes material spreading along with the rotation of the material spreading plate, compared with the spraying channel in the prior art, the material spreading plate is relatively open plate structure, which increases the area of calcium carbonate powder receiving and reduces the occurrence of clogging phenomenon in the material spreading process, and the edge of the material spreading plate can realize material falling without the need of concentrating calcium carbonate powder to the outlet of the spraying channel for releasing, thereby improving the uniformity of calcium carbonate powder in the material falling process.

[0019] The lower plate surface of the spreading plate is fixed with a disturbing plate which is at an acute angle with the plate surface, the disturbing plate can rotate with the rotation of the discharging cylinder, and the air in the calcining furnace is disturbed in the rotation process, so that the uniformity of the dispersion of the calcium carbonate powder in the calcining furnace is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the utility model;

[0021] Figure 2 It is a top view schematic view of the spreading plate on the discharging cylinder (omitting the material guide frame in the discharging cylinder);

[0022] Figure 3 It is a top view schematic view of the spreading plate;

[0023] Figure 4 It is a side view schematic view of the spreading plate;

[0024] Figure 5 It is a top view schematic view of the spreading plate on the discharging cylinder (omitting the material guide frame in the discharging cylinder);

[0025] Figure 6 It is a three-dimensional structure schematic view of the rotating spreading group in the prior art;

[0026] Fig. 1 is a calcining furnace, 2 is a heater, 3 is a feeding port, 4 is a driving gear, 5 is a driving motor, 501 is a rotating shaft, 6 is a discharging cylinder, 7 is a material guide frame, 8 is a discharging port, 9 is a spreading plate, 901 is a plate body, 902 is a guard strip, 903 is a disturbing plate, 904 is a spreading hole, 10 is a connecting rod, 11 is a radiation cone, 12 is an air outlet nozzle, 13 is an air conveying pipe, 14 is a support, 15 is a protective cover, and 16 is a spraying channel. DETAILED DESCRIPTION

[0027] The technical scheme of the utility model will be further described in detail in combination with specific embodiments, and the parts not described and disclosed in the following embodiments of the utility model should be understood as the prior art known or known by the person skilled in the art.

[0028] As Figure 1 shown, the utility model discloses a kind of suspension calcining devices, and same as prior art is, the suspension calcining device includes suspension calcining furnace 1 and the rotating spreading assembly of being arranged in suspension calcining furnace 1, suspension calcining furnace 1 is integrally installed on lower support 14, and the furnace cavity lower part of suspension calcining furnace 1 is provided with cooling group (not shown in the drawing), cooling group is located in the lower part of rotating spreading assembly, and the furnace cavity inner wall of suspension calcining furnace 1 is also provided with multiple heaters 2 to heat and calcine material in furnace cavity.

[0029] The rotating and scattering assembly comprises a discharging cylinder 6 with a plurality of discharging ports 8 formed in the side wall, the upper end of the discharging cylinder 6 is open and communicates with the feeding port 3 formed in the top of the suspension calcining furnace 1, the lower end of the discharging cylinder 6 is connected with a radiation cone 11 through a connecting rod 10, the inner wall of the discharging cylinder 6 is provided with a guide frame 7 corresponding to each discharging port 8, the outer wall of the discharging cylinder 6 is fixedly sleeved with a driving gear 4, and the driving gear 4 is located at the upper portion of the discharging cylinder 6, the top of the suspension calcining furnace 1 is rotatably provided with a rotating shaft 501, the upper end of the rotating shaft 501 extends out of the furnace cavity of the suspension calcining furnace 1 and is connected with a driving motor 5 for driving the rotating shaft 501 to rotate, the lower end of the rotating shaft 501 extends into the suspension calcining furnace 1 and is sleeved with the driving gear 4, and the driving gears 4 on the discharging cylinder 6 and the rotating shaft 501 are in meshing transmission to drive the discharging cylinder 6 to rotate.

[0030] Different from the prior art, the outer wall of the discharging cylinder 6 is provided with a plurality of material scattering plates 9 corresponding to the discharging ports 8 and inclined downward, one end of each material scattering plate 9 is fixed to the outer wall of the discharging cylinder 6 and flush with the lower edge of the corresponding discharging port 8, and the other end of the material scattering plate 9 is lower than the lower edge of the corresponding discharging port 8. The material scattering plates 9 are connected with the discharging ports 8 and the guide frames 7, the calcium carbonate powder entering the discharging cylinder 6 falls into the guide frames 7 and then flows into the discharging ports 8 along the guide frames 7, with the rotation of the discharging cylinder 6, part of the material is directly thrown out of the discharging cylinder 6 from the discharging ports 8, and the other part is transported to the material scattering plates 9 through the discharging ports 8, since the material scattering plates 9 rotate with the discharging cylinder 6, the material (i.e. calcium carbonate powder) on the material scattering plates 9 can move to the lower end of the material scattering plate 9 under the action of gravity and centrifugal force, and at the same time, the material can also be scattered along the edge of the material scattering plate 9 due to the rotation of the material scattering plate 9, the material scattering process and the movement process of the material to the lower end of the material scattering plate 9 are carried out simultaneously, the edge of the material scattering plate 9 can realize material scattering, so the material can be dropped at different positions in the suspension calcining furnace 1, and the material scattering is more uniform. In addition, the material scattering plates can also disturb and scatter the material directly thrown out of the discharging ports 8, so as to improve the uniformity of the distribution of the material in the suspension calcining furnace 6.

[0031] The acute angle between the material scattering plate 9 and the horizontal plane is 15-35 degrees, and this arrangement facilitates the movement of the material along the plate surface 901 of the material scattering plate 9 and the scattering of the material. If the material scattering plate 9 is arranged horizontally, the material falling on the material scattering plate 9 is not easy to move away from the discharging cylinder 6 along the material scattering plate 9, and the material is mainly scattered at the position close to the discharging cylinder 6, so the scattered material is relatively concentrated, and the material scattering effect is poor. If the inclination angle of the material scattering plate 9 is too large, more material moves downward with the material scattering plate 9, and the material scattering effect is still general.

[0032] In combination with the above description, Figure 2 , 3As shown in Figure 4, the spray plate 9 is a fan-shaped plate, specifically including a fan-shaped plate body 901. The plate body 901 has an inner arc connected to the outer wall of the discharge cylinder 6, an outer arc away from the discharge cylinder 6, and two sides connecting the inner arc and the outer arc. The length of the outer arc is less than that of the inner arc. In order to prevent the material discharged from the discharge port 8 from being sprayed too much after falling into the spray plate 9, as the spray plate 9 rotates, an upwardly protruding guard strip 902 is provided on the edge of the two sides of the plate body 901. The height of the guard strip 902 gradually decreases along the direction of the spray plate 9 away from the discharge port 8, and the end of the guard strip 902 is flush with the upper surface of the spray plate 9. A large amount of material falls from the discharge port 8 into the spray plate 9. At this time, the material is restrained by the guard strip 902 to reduce the amount of spillage. As the material moves on the spray plate 9, some of the material has already spilled. The plate body 901 of the spray plate 9 gradually increases in size to facilitate the dispersion of the material. The guard strip 902 is no longer set at one end of the outer arc of the spray plate 9 to restrain the material, and the material can be directly thrown out of the spray plate 9.

[0033] The length of the spray plate 9 gradually decreases from top to bottom. The lower spray plate 9 can also disturb the material scattered by the upper spray plate 9, thereby improving its dispersion effect in the suspension calcining furnace 1.

[0034] To further improve the dispersion effect, a disturbance plate 903 is provided on the lower surface 901 of the spray plate 9. The angle between the disturbance plate 903 and the spray plate 9 is an acute angle. As the spray plate 9 rotates with the calcining furnace 1, the disturbance plate 903 can also rotate with the spray plate 9, thereby disturbing the air suspended in the calcining furnace 1. The discharge port 8 on the feeding cylinder 6 and the spray plate 9 on the outer wall of the feeding cylinder 6 are both set in multiple layers, and the discharge ports 8 of different layers are staggered. The disturbance plates 903 under the same layer of spray plate 9 have the same inclination angle. When rotating, the disturbance effect of the spray plate 9 can be achieved by controlling the rotation direction of the feeding cylinder 6.

[0035] like Figure 5 As shown, the material spraying plate 9 has a spraying hole 904 on its plate body 901. The spraying hole 904 is a round hole with a diameter of 0.5-1cm, which allows some of the material falling on the material spraying plate 9 to fall into the suspension calcining furnace 1 along the spraying hole 904, increasing the number of material scattering points.

[0036] The suspension calcination furnace 1 is provided with an air inlet assembly, and the flowing gas is introduced into the suspension calcination furnace 1 through the air inlet assembly, so that the material is in a suspended state in the furnace cavity. The air inlet assembly is located at the bottom of the rotary material distribution assembly and above the cooling group (prior art, not shown in the figure), and the air inlet assembly comprises a wind conveying pipe 13 and a plurality of air outlet nozzles 12 which are arranged on the wind conveying pipe 13. The mounting rack is arranged transversely in the suspension calcination furnace 1, and the wind conveying pipe 13 is arranged on the mounting rack. The number of wind conveying pipes 13 of the same air inlet assembly is multiple, and the wind conveying pipes 13 are arranged horizontally and spaced apart, so as to provide uniform upward gas in the furnace cavity. A certain gap is left between adjacent wind conveying pipes 13 to allow the calcium carbonate powder in the suspension calcination furnace 1 to fall into the cooling group below.

[0037] In order to further improve the air inlet effect and the air inlet amount, the air inlet assembly is provided with a plurality of groups arranged vertically, and the air inlet assembly in the embodiment is provided with two groups.

[0038] In addition, since the calcium carbonate powder in the suspension calcination furnace 1 is in a suspended state, the calcium carbonate powder will diffuse to the driving gear 4 of the discharge cylinder 6 and the driving gear 4 of the rotating shaft 501, and the powder adhered to the driving gear 4 will affect the meshing transmission effect. Therefore, a protective cover 15 is arranged on the rotating shaft 501 in the furnace cavity, the protective cover 15 is opened towards the side of the discharge cylinder 6, and a gap is left between the protective cover 15 and the discharge cylinder 6 to avoid affecting the meshing transmission of the driving gear 4. The protective cover 15 protects the driving gear 4, to a certain extent, prevents the interference of the calcium carbonate powder on the meshing transmission of the two driving gears 4, and ensures the stable operation of the suspension calcination device.

[0039] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A suspension calcining device, comprising a suspension calcining furnace (1) and a rotary distribution assembly arranged in the suspension calcining furnace (1), the rotary distribution assembly comprising a distribution cylinder (6) with a plurality of discharge ports (8) formed in a side wall of the distribution cylinder (6), and a guide frame (7) corresponding to each of the discharge ports (8) arranged on an inner wall of the distribution cylinder (6), characterized in that, The outer wall of the discharging cylinder (6) is provided with a material scattering plate (9) corresponding to each discharging port (8), one end of the material scattering plate (9) is fixed to the outer wall of the discharging cylinder (6) and is flush with the lower edge of the discharging port (8), and the other end of the material scattering plate (9) is lower than the lower edge of the discharging port (8).

2. A suspension calciner according to claim 1, wherein The acute angle between the material scattering plate (9) and the horizontal plane is 15-35 degrees.

3. A suspension calciner according to claim 1, wherein The edge of the material scattering plate (9) is provided with an upper convex guard strip (902), the height of the guard strip (902) gradually decreases along the direction of the material scattering plate (9) away from the discharging port (8), and the end of the guard strip (902) is flush with the upper surface of the material scattering plate (9).

4. A suspension calciner according to claim 1, wherein The lower surface of the material scattering plate (9) is provided with a disturbance plate (903), and the included angle between the disturbance plate (903) and the material scattering plate (9) is an acute angle.

5. A suspension calciner according to claim 4, wherein The discharging ports (8) on the discharging cylinder (6) and the material scattering plates (9) on the outer wall of the discharging cylinder (6) are all provided in multiple layers, and the inclination angles of the disturbance plates (903) below the material scattering plates (9) in the same layer are the same.

6. A suspension calciner according to claim 1, wherein The material scattering plate (9) is a fan-shaped plate.

7. A suspension calciner according to claim 1, wherein A plurality of material scattering holes (904) are formed in the plate body (901) of the material scattering plate (9).

8. A suspension calciner according to claim 7, wherein The diameter of the material scattering hole (904) is 0.5-1 cm.

9. A suspension calciner according to claim 1, wherein The suspension calcination furnace (1) is provided with an air inlet assembly, and the air inlet assembly is located at the bottom of the rotating material scattering assembly.

10. A suspension calciner according to claim 9, wherein The air inlet assembly comprises an air inlet pipe (13) and a plurality of air outlet nozzles (12) arranged at intervals on the air inlet pipe (13).

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