Material blocking structure for cement grinding mill

Abstract

The utility model provides a material blocking structure for a cement mill, and relates to the technical field of cement production equipment, the material blocking structure for the cement mill comprises a plurality of arc-shaped material blocking plates which are annularly distributed above a milling bowl of a coal mill at equal intervals and a fixing assembly used for fixing each arc-shaped material blocking plate in a coal mill shell, and the fixing assembly comprises a fixing seat and a fixing plate; the arc-shaped material baffles are fixedly connected with one ends of the fixing plates through the fixing seats, and the ends, away from the arc-shaped material baffles, of the fixing plates are fixedly connected with the inner wall of the coal mill shell. When the grinding bowl of the coal mill rotates, the raw coal moves to the periphery of the grinding bowl of the coal mill from the position between the arc-shaped striker plate and the grinding bowl of the coal mill under the action of centrifugal force, and a grinding machine with the appropriate thickness is formed on the grinding bowl of the coal mill, so that the raw coal is fully ground, coal briquettes are reduced, and the content of the coal briquettes in discharged slag is reduced; and energy waste is avoided.

Description

Technical Field

[0001] This application relates to the technical field of cement production equipment, and more specifically, to a material retaining structure for a cement mill. Background Art

[0002] A coal mill is an important device for grinding raw coal into pulverized coal. During the cement production process, the raw coal is ground and pulverized by the coal mill to produce pulverized coal that meets the requirements of the cement production process. A bowl coal mill is a type of coal mill, and its working principle is as follows: The raw coal is fed through the central coal feeding pipe and falls onto the rotating grinding bowl. Under the action of centrifugal force, it moves towards the periphery of the grinding bowl, forming a grinding bed on the grinding bowl. Three independent spring-loaded grinding rollers are distributed at intervals of 120° and installed on the grinding bowl. There is a certain gap between the grinding rollers and the grinding bowl. The grinding rollers apply the necessary grinding pressure using a spring pressure device. The coal is ground into powder between the grinding bowl liner and the grinding rollers. The pulverized coal moves outward under the action of centrifugal force and overflows along the periphery of the grinding bowl. Hot air enters from the side body and then rises along the outer diameter of the rotating grinding bowl. The blades (impellers) installed on the grinding bowl make the airflow tend to be in the vertical direction. The smaller and lighter coal particles on the outer edge of the grinding bowl are carried upward by the airflow, while the heavy and non-grindable foreign impurities pass through the airflow and fall into the side body area.

[0003] However, during the use of the existing bowl coal mill, the raw coal moves towards the periphery of the grinding bowl under the action of centrifugal force, forming a relatively thick grinding bed on the grinding bowl, resulting in insufficient grinding under the grinding of the grinding rollers. The heavier and larger coal blocks are likely to pass through the airflow and fall into the side body area under the action of centrifugal force, increasing the amount of coal blocks in the slag discharge and causing energy waste. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a material retaining structure for a cement mill, which can solve the technical problem that the raw coal in the existing bowl coal mill is not sufficiently ground, resulting in an increase in the amount of coal blocks in the slag discharge and energy waste.

[0005] The embodiments of this application provide a material retaining structure for a cement mill, including a plurality of arc-shaped material retaining plates arranged in a ring at equal intervals above the grinding bowl of the coal mill and a fixing component for fixing each arc-shaped material retaining plate inside the coal mill housing. The fixing component includes a fixing seat and a fixing plate. The arc-shaped material retaining plate is fixedly connected to one end of the fixing plate through the fixing seat, and the end of the fixing plate away from the arc-shaped material retaining plate is fixedly connected to the inner wall of the coal mill housing. The distance between adjacent two arc-shaped material retaining plates is adapted to the width of the grinding rollers of the coal mill.

[0006] Further, three arc-shaped material retaining plates are provided, and the three grinding rollers of the coal mill are respectively arranged between adjacent two arc-shaped material retaining plates.

[0007] Furthermore, the distance between the bottom of the arc-shaped baffle plate and the grinding bowl of the coal mill is 6 - 10 cm.

[0008] Furthermore, the height of the arc-shaped baffle plate is 10 - 20 cm.

[0009] Furthermore, support members are symmetrically arranged on both sides of the fixing plate. One end of the support member is fixedly connected to the fixing plate, and the other end of the support member is fixedly connected to the inner wall of the coal mill housing.

[0010] Furthermore, two fixing components are provided on each arc-shaped baffle plate, and the two fixing components are symmetrically arranged.

[0011] Advantages of the present utility model:

[0012] In the present utility model, a plurality of arc-shaped baffle plates are arranged in a ring at equal intervals above the grinding bowl of the coal mill. Through the arrangement of the plurality of arc-shaped baffle plates, the raw coal fed from the central coal feeding pipe and falling onto the grinding bowl of the coal mill is limited, and the raw coal is evenly distributed on the grinding disc. When the grinding bowl of the coal mill rotates, the raw coal moves from between the arc-shaped baffle plate and the grinding bowl of the coal mill to the periphery of the grinding bowl of the coal mill under the action of centrifugal force, forming a grinding bed with an appropriate thickness on the grinding bowl of the coal mill, enabling the raw coal to be ground sufficiently, reducing the generation of coal blocks, thereby reducing the content of coal blocks in the slag discharge, and avoiding energy waste. Description of the drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of some embodiments of the present application;

[0015] Figure 2 It is a schematic structural diagram of the arc-shaped baffle plate and the fixing component in some embodiments of the present application;

[0016] The reference numerals are respectively:

[0017] 1, grinding bowl of the coal mill; 2, arc-shaped baffle plate; 3, coal mill housing; 4, fixing component; 41, fixing seat; 42, fixing plate; 5, grinding roller of the coal mill; 6, support member. Detailed implementation manners

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0020] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0022] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. Specific embodiments:

[0025] Such as Figure 1and Figure 2 As shown in the figure, the present application provides a material baffle structure for a cement mill, which is improved on the bowl mill in the prior art. It includes a plurality of arc-shaped baffle plates 2 arranged in an annular shape at equal intervals above the grinding bowl 1 of the coal mill and a fixing component 4 for fixing each arc-shaped baffle plate 2 in the coal mill housing 3. The fixing component 4 includes a fixing seat 41 and a fixing plate 42. The arc-shaped baffle plate 2 is fixedly connected to one end of the fixing plate 42 through the fixing seat 41, and the end of the fixing plate 42 far from the arc-shaped baffle plate 2 is fixedly connected to the inner wall of the coal mill housing 3. The distance between two adjacent arc-shaped baffle plates 2 is adapted to the width of the coal mill roller 5. Through the arrangement of the plurality of arc-shaped baffle plates 2, the raw coal fed from the central coal feeding pipe and falling onto the grinding bowl 1 of the coal mill is limited, and the raw coal is evenly distributed on the grinding disc. When the grinding bowl 1 of the coal mill rotates, the raw coal moves from between the arc-shaped baffle plate 2 and the grinding bowl of the coal machine to the periphery of the grinding bowl 1 under the action of centrifugal force, forming a grinding bed with a suitable thickness on the grinding bowl 1 of the coal mill, making the raw coal be ground sufficiently, reducing the generation of coal blocks, and further reducing the content of coal blocks in the slag discharge, avoiding energy waste.

[0026] As Figure 1 and Figure 2 shown in the figure, three arc-shaped baffle plates 2 are provided, and the three coal mill rollers 5 of the coal mill are respectively arranged between two adjacent arc-shaped baffle plates 2. In the prior art, the three coal mill rollers 5 are distributed at an interval of 120°. Cooperating with the three arc-shaped baffle plates 2, the raw coal fed from the central coal feeding pipe and falling onto the grinding bowl 1 of the coal mill is surrounded and limited. In this embodiment, the horizontal distance between the arc-shaped baffle plate 2 and the coal spraying port of the central coal feeding pipe is 80 cm, which can surround enough raw coal.

[0027] As Figure 1 shown in the figure, the distance between the bottom of the arc-shaped baffle plate 2 and the grinding bowl 1 of the coal mill is 6 - 10 cm. The thickness of the raw coal formed on the grinding bowl 1 of the coal mill depends on the distance between the bottom of the arc-shaped baffle plate 2 and the grinding bowl 1 of the coal mill. The greater the distance between the bottom of the arc-shaped baffle plate 2 and the grinding bowl 1 of the coal mill, the greater the thickness of the raw coal formed on the grinding bowl 1 of the coal mill. In this embodiment, the distance between the bottom of the arc-shaped baffle plate 2 and the grinding bowl 1 of the coal mill is 8 cm, making the thickness of the raw coal formed on the grinding bowl 1 of the coal mill moderate, and improving the grinding efficiency of the raw coal while reducing the generation of coal blocks.

[0028] As Figure 2 shown in the figure Figure 2As shown, the height of the arc-shaped baffle 2 is 10-20 cm. The higher the height of the arc-shaped baffle 2, the more raw coal can be enclosed on the grinding bowl 1 of the coal mill. In this embodiment, the height of the arc-shaped baffle 2 is 15 cm, ensuring that the enclosed raw coal is sufficient to ensure the continuous flow of the raw coal around under the action of centrifugal force, while avoiding excessive height of the arc-shaped baffle 2 from causing movement interference to the internal operation of the coal mill.

[0029] As Figure 1 and Figure 2 shown, support members 6 are symmetrically arranged on both sides of the fixing plate 42. One end of the support member 6 is fixedly connected to the fixing plate 42, and the other end of the support member 6 is fixedly connected to the inner wall of the coal mill housing 3. Through the arrangement of the support members 6, the connection between the fixing plate 42 and the inner wall of the coal mill housing 3 is enhanced, making the structure more stable.

[0030] As Figure 1 and Figure 2 shown, two fixing components 4 are provided on each arc-shaped baffle 2. The two fixing components 4 are symmetrically arranged, and each arc-shaped baffle 2 is fixed by the two fixing components 4, making the fixing structure of the arc-shaped baffle 2 more stable.

[0031] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A material retaining structure for a cement mill, characterized in that: It includes a plurality of arc-shaped baffle plates which are arranged in a ring shape at equal intervals above the grinding bowl of the coal mill and a fixing component for fixing each of the arc-shaped baffle plates in the coal mill shell, the fixing component includes a fixing seat and a fixing plate, the arc-shaped baffle plate is fixedly connected to one end of the fixing plate via the fixing seat, the end of the fixing plate away from the arc-shaped baffle plate is fixedly connected to the inner wall of the coal mill shell, and the distance between two adjacent arc-shaped baffle plates is adapted to the width of the grinding roller of the coal mill.

2. A cement mill retaining structure according to claim 1, characterized in that: The arc-shaped material baffle plates are provided in three numbers, and the three coal mill grinding rollers of the coal mill are respectively and correspondingly arranged between two adjacent arc-shaped material baffle plates.

3. A cement mill retaining structure according to claim 1, characterized in that: The distance between the bottom of the arc-shaped baffle plate and the grinding bowl of the coal mill is 6 to 10 cm.

4. A cement mill retaining structure according to claim 1, characterized in that: The height of the arc-shaped material blocking plate is 10 to 20 cm.

5. The material retaining structure for cement mill according to claim 1, characterized in that: Support members are symmetrically arranged on both sides of the fixing plate, one end of the support member is fixedly connected to the fixing plate, and the other end of the support member is fixedly connected to the inner wall of the coal mill casing.

6. A cement mill retaining structure according to claim 1, characterized in that: Each of the arc-shaped baffle plates is provided with two fixing components, and the two fixing components are symmetrically arranged.

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