A steady flow bin for a raw meal grinding roller press

Abstract

This invention relates to a flow stabilizing silo for a raw material grinding roller press, belonging to the technical field of cement production equipment. It includes a feed silo, a discharge silo, a distribution platform, a distributor, and a distribution motor. The feed silo is a cylindrical silo with a cover plate installed on its top. A feed inlet is located in the center of the cover plate. The opening at the top of the discharge silo is connected to the opening at the bottom of the feed silo. Fixed rings and rotating rings are evenly and alternately installed on the inner wall of the discharge silo. The distribution platform is installed at intervals below the bottom opening of the guide cylinder via support rods. The distributor and distribution motor are installed on the distribution platform. This application can solve the problems of poor material uniformity leading to segregation and skin formation caused by moisture in traditional flow stabilizing silos during the flow stabilization process of cement raw materials.

Description

Technical Field

[0001] This invention relates to the field of cement production equipment technology, specifically to a flow stabilizing chamber for a raw material grinding roller press. Background Technology

[0002] In the cement production process, raw meal grinding involves crushing and finely grinding raw materials such as limestone, clay, and iron ore to achieve a certain fineness and uniformity, forming raw meal suitable for calcination. The quality of the raw meal directly affects the quality of cement clinker and production efficiency. To ensure the uniformity and continuous supply of raw meal, a flow stabilizing silo becomes an important device connecting the roller press, storing, and conveying the raw meal.

[0003] The main function of the steady flow bin is to store materials from upstream equipment for a short period of time. Through the structure of the bin and the internal fluidization design, the flow of materials is adjusted and buffered to achieve uniform and stable material conveying, providing suitable material conditions for subsequent roller press grinding. Therefore, the effective operation of the steady flow bin is the key to ensuring the efficient and stable operation of the grinding system.

[0004] Cement raw materials are the core raw materials for cement production. They are mainly made by mixing limestone, clay, iron ore, and other raw materials in a certain proportion, and then crushing and grinding them. Cement raw materials are usually in the form of fine powder or granules, and their particle size distribution and moisture content directly affect their flowability, dispersibility, and grinding efficiency.

[0005] Traditional flow stabilizers, used as connecting devices for cement raw material roller presses, have the following drawbacks:

[0006] First, high moisture content in cement raw materials leads to crusting inside the silo: Cement raw materials often have a high moisture content, and the inner wall of traditional steady flow silos is prone to crusting due to the adhesion of moisture from the material. This crusting not only reduces the effective volume of the silo, but also hinders the normal flow of materials, leading to problems such as silo blockage and uneven silo movement, which seriously affects the operating efficiency of the steady flow silo.

[0007] Secondly, there is the issue of segregation caused by the inhomogeneity of cement raw meal and uneven feeding: the composition and particle distribution of cement raw meal may change with time and the source of the feed, and traditional steady-flow silos have a weak ability to regulate these fluctuations. When the material particles are not uniform, stratification or segregation is easily formed in the silo, resulting in poor uniformity of the material at discharge and affecting the grinding quality of the subsequent roller press. Moreover, the feeding method of traditional steady-flow silos mostly adopts gravity or belt conveyor direct feeding, while the feed in cement raw meal steady-flow silos not only includes cement raw meal, but also often includes V-separator return powder and high-efficiency classifier return powder. After different materials enter the silo, due to differences in flow velocity or particle size distribution, stratification and segregation will also occur, with larger particles and finer particles agglomerating in different areas, further reducing the uniformity of the discharge and increasing the volatility in the production process.

[0008] The above-mentioned problems not only affect the quality of material conveying, but also reduce the operating efficiency and reliability of the stabilizing bin. Therefore, this application proposes a stabilizing bin for a raw material grinding roller press. Summary of the Invention

[0009] In order to overcome the problems in the background art, the purpose of this invention is to provide a flow stabilizing bin for a raw material grinding roller press, which solves the problems of poor material uniformity leading to segregation and skin formation caused by moisture in the traditional flow stabilizing bin during the cement raw material flow stabilization process.

[0010] A flow stabilizing chamber for a raw material grinding roller press includes a feeding chamber, a discharging chamber, a feeding platform, a feeding device, and a feeding motor. The feeding chamber is a cylindrical chamber with a cover plate installed on the top. A feeding port is opened in the middle of the cover plate, and a guide tube is installed at the bottom of the feeding port.

[0011] The fabric feeding platform is a frustum, and it is coaxially installed in the feed hopper below the guide tube via a support rod.

[0012] The feeder includes a central shaft and auger blades. The central shaft is coaxially mounted on the feed platform via a bearing installed on the feed platform housing. The central shaft above the feed platform extends into the guide tube, and the auger blades are mounted on the central shaft inside the guide tube.

[0013] The fabric motor is installed inside the housing of the fabric platform, and the power output end of the fabric motor is connected to the sprocket on the central shaft through chain drive.

[0014] The discharge hopper is a conical hopper. The top opening of the discharge hopper is connected to the bottom opening of the feed hopper. The bottom of the discharge hopper is provided with a discharge port. The central shaft below the fabric distribution platform extends into the discharge port. Fixed rings are evenly spaced on the inner wall of the discharge hopper. Rotating rings are evenly spaced between the fixed rings. An extension is installed on the central shaft below the fabric distribution platform to connect the rotating rings.

[0015] Furthermore, a cyclone separator is installed on the feed inlet, and the outlet at the bottom of the cyclone separator extends into the upper middle part of the guide tube. Symmetrical feed inlets one and two are tangentially arranged on the side wall at the top of the cyclone separator, and booster fans are installed on feed inlets one and two.

[0016] Furthermore, the top of the central shaft is positioned below the outlet of the cyclone separator, and an umbrella-shaped material distribution plate is installed at the top of the central shaft.

[0017] Furthermore, the fabric feeding table is uniformly provided with feeding rods connected to the central shaft.

[0018] Furthermore, the bottom flange of the discharge port is connected to a material distribution chute. The cross-section of the material distribution chute along the axis of the pipe body gradually transitions from a circle at the top to an ellipse at the bottom. The major axis of the elliptical opening at the bottom of the material distribution chute is greater than the diameter of the circular opening at the top of the material distribution chute, and the minor axis of the elliptical opening is less than the diameter of the circular opening at the top of the material distribution chute.

[0019] The beneficial effects of this invention are as follows:

[0020] This application improves upon the traditional steady-flow silo by adding a distributor inside the silo. Fixed and rotating rings are evenly and alternately installed on the inner wall of the discharge silo. The rotating rings rotate slowly under the drive of the distributor, increasing the fluidity of the material adhering to the wall and solving the problem of raw material adhesion and crusting. A guide cylinder and a cyclone separator are added above the distribution platform. The raw material and the dust collected by the cyclone separator are evenly mixed in the guide cylinder and then evenly conveyed to the distribution platform by the distributor. This can solve the problem of segregation caused by unevenness of cement raw materials and uneven feeding. Attached Figure Description

[0021] To clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments are explained.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the container structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the fabric feeder structure of the present invention;

[0027] Figure 6 This is a top view of the structure of the present invention;

[0028] Figure 7 This is a bottom-view structural diagram of the present invention.

[0029] 1-Feeding bin, 11-Cover plate, 12-Feeding port, 13-Guide cylinder, 2-Discharge bin, 21-Discharge port, 22-Fixing ring, 23-Rotating ring, 3-Distribution platform, 31-Support rod, 32-Pulley rod, 4-Distributor, 41-Central shaft, 42-Auger blade, 43-Extension piece, 44-Distribution tray, 5-Distribution motor, 6-Cyclone separator, 61-Feeding port one, 62-Feeding port two, 7-Distribution chute. Detailed Implementation

[0030] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below to facilitate understanding by those skilled in the art.

[0031] A flow stabilizing chamber for a raw material grinding roller press, see reference. Figure 1-2 It includes a feeding bin 1, a discharging bin 2, a feeding platform 3, a feeding device 4, and a feeding motor 5. The feeding bin 1 is a cylindrical bin, which allows for good flow and distribution of raw materials within the bin, preventing material accumulation. A cover plate 11 is installed on the top of the feeding bin 1, and a feeding port 12 is opened in the middle of the cover plate. A guide tube 13 is installed at the bottom of the feeding port 12, allowing raw materials to be added through the feeding port 12 and transported into the feeding bin 1 via the guide tube 13.

[0032] The feeding platform 3 is a truncated cone. The outer circumference of the feeding platform 3 is chamfered to form a slope for easy material feeding. The feeding platform 3 is coaxially installed in the feed hopper 1 below the guide cylinder 13 via the support rod 31. The feeding platform 3 and the guide cylinder 13 are installed at a distance. The raw material coming out of the guide cylinder 13 falls onto the feeding platform 3. The material forms a natural accumulation on the feeding platform 3. The overflowing material is evenly sprinkled into the discharge hopper 2 to achieve uniform material feeding.

[0033] The feeder 4 includes a central shaft 41 and an auger blade 42. The central shaft 41 is coaxially mounted on the feed platform 3 via a bearing installed on the housing of the feed platform 3. It is the transmission structure of the uniform feed distribution mechanism in the silo. The central shaft 41 above the feed platform 3 extends into the guide cylinder 13. The auger blade 42 is mounted on the central shaft 41 inside the guide cylinder 13, which can mix the raw materials and solve the problem of unevenness of cement raw materials.

[0034] The fabric motor 5 is installed inside the housing of the fabric platform 3. The power output end of the fabric motor 5 is connected to the sprocket on the central shaft 41 through chain drive, which drives the rotating ring 23 and the auger blade 42 to rotate.

[0035] The discharge bin 2 is a conical silo, which facilitates the feeding of raw materials. The top opening of the discharge bin 2 is connected to the bottom opening of the feed bin 1. The bottom of the discharge bin 2 is provided with a discharge port 21, which can send the raw materials stored in the feed bin 1 into the roller press. The central shaft 41 under the feeding table 3 extends into the discharge port 21 to prevent material accumulation in the discharge port 21. Fixed rings 22 are evenly spaced on the inner wall of the discharge bin 2. Rotating rings 23 are evenly installed between the intervals of the fixed rings 22. An extension 43 is installed on the central shaft 41 under the feeding table 3 to connect each rotating ring 23. The rotating rings 23 can rotate slowly under the drive of the feeder 4 to increase the fluidity of the material adhering to the wall and prevent the raw materials from sticking to the wall and forming a skin for a long time.

[0036] See Figure 1 , Figure 2 , Figure 3 and Figure 6A cyclone separator 6 is installed on the feed inlet 12. The outlet at the bottom of the cyclone separator 6 extends to the upper part of the guide tube 13. Symmetrical feed inlets 61 and 62 are tangentially arranged on the side wall at the top of the cyclone separator 6. A booster fan is installed on feed inlet 61 and feed inlet 62, which can be connected to the return powder pipes of the V-separator and the high-efficiency powder separator, respectively, to screen out particulate materials and recover dust at the same time, so as to avoid the dust affecting the uniformity and pressure of the materials in the silo.

[0037] See Figure 2 , Figure 3 and Figure 5 The top of the central shaft 41 above the material distribution platform 3 is located below the outlet at the bottom of the cyclone separator 6. An umbrella-shaped material distribution plate 44 is installed at the top of the central shaft 41, which can make the separated material spread evenly.

[0038] See Figure 2 , Figure 3 The fabric spreading table 3 is uniformly provided with material-pulling rods 32 connected to the central shaft 41. The length of the material-pulling rods 32 is greater than the platform radius on the fabric spreading table 3. The material-pulling rods 32 can rotate slowly under the drive of the fabric spreading device 4 to avoid the unevenness of the fabric spreading caused by the skin forming on the surface of the fabric spreading table 3. At the same time, the material-pulling rods 32 can also remove the residual material when it remains on the fabric spreading device 4, avoiding manual cleaning.

[0039] See Figure 1 , Figure 2 , Figure 3 and Figure 7 The bottom flange of the discharge port 21 is connected to a material chute 7. The cross-section of the material chute 7 gradually transitions from a circle at the top to an ellipse at the bottom along the axis of the pipe body. The major axis of the elliptical opening at the bottom of the material chute 7 is greater than the diameter of the circular opening at the top of the material chute 7, and the minor axis is less than the diameter of the circular opening at the top of the material chute 7. This ensures that the feeding amount is maximized in the middle of the roller press and decreases along both sides, providing a stable material pressure for the roller press.

[0040] Work process:

[0041] Connect the return powder pipes of the V-separator and the high-efficiency classifier to the feed inlet 61 and the feed inlet 62. Start the feeding motor 5. During the feeding process of the stabilizing silo to the roller press, the feeding motor 5 drives the central shaft 41 to rotate slowly. The raw material is added to the guide cylinder 13 through the feed inlet 12. The auger blades 42 mix the raw material with the V-separator return powder and the high-efficiency classifier return powder and then convey it to the feeding platform 3 in the feed silo 1. The material forms a natural accumulation on the baffle. The overflowing material is evenly sprinkled into the discharge silo 2. When the material passes through the silo wall of the discharge silo 2, the fluidity increases due to the slow rotation of the rotating ring 23 driven by the feeder 4. The raw material that is difficult to adhere to the wall of the discharge silo 2 for a long time forms a skin. The raw material flows to the discharge port 21 of the discharge silo 2 and is conveyed by the feeding chute 7 along the width of the roller shaft to the rollers for roller pressing.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flow stabilizing chamber for a raw material grinding roller press, characterized in that: It includes a feeding bin (1), a discharging bin (2), a feeding platform (3), a feeding device (4), and a feeding motor (5). The feeding bin (1) is a cylindrical bin. A cover plate (11) is installed on the top of the feeding bin (1). A feeding port (12) is opened in the middle of the cover plate. A guide tube (13) is installed at the bottom of the feeding port (12). The fabric distribution table (3) is a frustum, and the fabric distribution table (3) is coaxially installed in the feed hopper (1) below the guide tube via a support rod (31); The feeder (4) includes a central shaft (41) and auger blades (42). The central shaft (41) is coaxially mounted on the feed platform (3) via a bearing installed on the housing of the feed platform (3). The central shaft (41) above the feed platform (3) extends into the guide tube (13). The auger blades (42) are mounted on the central shaft (41) inside the guide tube (13). The fabric motor (5) is installed inside the housing of the fabric table (3), and the power output end of the fabric motor (5) is connected to the sprocket on the central shaft (41) through chain drive. The discharge bin (2) is a conical silo. The top opening of the discharge bin (2) is connected to the bottom opening of the feed bin (1). The bottom of the discharge bin (2) is provided with a discharge port (21). The central shaft (41) below the fabric distribution table (3) extends into the discharge port (21). Fixed rings (22) are evenly spaced on the inner wall of the discharge bin (2). Rotating rings (23) are evenly spaced between the fixed rings (22). An extension (43) is installed on the central shaft (41) below the fabric distribution table (3) to connect each rotating ring (23). A cyclone separator (6) is installed on the feed inlet (12). The outlet at the bottom of the cyclone separator (6) extends into the upper middle part of the guide tube (13). Symmetrical feed inlets one (61) and two feed inlets two (62) are tangentially arranged on the side wall at the top of the cyclone separator (6). A booster fan is installed on feed inlets one (61) and feed inlets two (62). The top of the central shaft (41) is located below the outlet of the cyclone separator (6), and an umbrella-shaped material tray (44) is installed at the top of the central shaft (41). The fabric feeding table (3) has material feeding rods (32) evenly arranged on its surface and connected to the central shaft (41).

2. The flow stabilizing chamber of the raw material grinding roller press according to claim 1, characterized in that: The bottom flange of the discharge port (21) is connected to a material chute (7). The cross section of the material chute (7) along the axis of the pipe body gradually transitions from a circle at the top to an ellipse at the bottom. The major axis of the elliptical opening at the bottom of the material chute (7) is greater than the diameter of the circular opening at the top of the material chute (7), and the minor axis of the elliptical opening is less than the diameter of the circular opening at the top of the material chute (7).

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